1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.617 2010/06/05 09:10:09 pdp Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
8 PP/01 Date: & Message-Id: revert to normally being appended to a message,
9 only prepend for the Resent-* case. Fixes regression introduced in
10 Exim 4.70 by NM/22 for Bugzilla 607.
12 PP/02 Include check_rfc2047_length in configure.default because we're seeing
13 increasing numbers of administrators be bitten by this.
15 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
17 PP/03 Bugzilla 994: added openssl_options main configuration option.
22 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
24 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
26 NM/01 Bugzilla 965: Support mysql stored procedures.
27 Patch from Alain Williams
29 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
31 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
32 Patch from Andreas Metzler
34 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
35 Patch from Kirill Miazine
37 NM/05 Bugzilla 671: Added umask to procmail example.
39 JJ/03 installed exipick 20100323.0, fixing doc bug
41 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
42 directory. Notification and patch from Dan Rosenberg.
44 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
46 TK/02 Improve log output when DKIM signing operation fails.
48 MH/01 Treat the transport option dkim_domain as a colon separated
49 list, not as a single string, and sign the message with each element,
50 omitting multiple occurences of the same signer.
52 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
53 Bugzilla 985, 986. Patch by Simon Arlott
55 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
58 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
59 MBX locking. Notification from Dan Rosenberg.
65 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
67 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
69 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
71 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
73 NM/04 Bugzilla 915: Flag broken perl installation during build.
79 TK/01 Added patch by Johannes Berg that expands the main option
80 "spamd_address" if it starts with a dollar sign.
82 TK/02 Write list of recipients to X-Envelope-Sender header when building
83 the mbox-format spool file for content scanning (suggested by Jakob
86 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
87 (http://www.dcc-servers.net/) support via dccifd. Activated by
88 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
90 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
91 by Mark Daniel Reidel <mr@df.eu>.
93 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
94 When building exim an external PCRE library is now needed -
95 PCRE is a system library on the majority of modern systems.
96 See entry on PCRE_LIBS in EDITME file.
98 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
99 conversation. Added nologin parameter to request.
100 Patch contributed by Kirill Miazine
102 TF/01 Do not log submission mode rewrites if they do not change the address.
104 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
106 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
107 log files in place. Contributed by Roberto Lima
109 NM/04 Bugzilla 667: close socket used by dovecot authenticator
111 TF/03 Bugzilla 615: When checking the local_parts router precondition
112 after a local_part_suffix or local_part_prefix option, Exim now
113 does not use the address's named list lookup cache, since this
114 contains cached lookups for the whole local part.
116 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
117 Robert Millan. Documentation is in experimental-spec.txt
119 TF/04 Bugzilla 668: Fix parallel build (make -j).
121 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
123 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
124 Patch provided by Jan Srzednicki
126 TF/05 Leading white space used to be stripped from $spam_report which
127 wrecked the formatting. Now it is preserved.
129 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
130 that they are available at delivery time.
132 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
134 TF/08 TLS error reporting now respects the incoming_interface and
135 incoming_port log selectors.
137 TF/09 Produce a more useful error message if an SMTP transport's hosts
138 setting expands to an empty string.
140 NM/06 Bugzilla 744: EXPN did not work under TLS.
141 Patch provided by Phil Pennock
143 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
144 Patch provided by Richard Godbee
146 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
147 acl_smtp_notquit, added index entry.
149 NM/09 Bugzilla 787: Potential buffer overflow in string_format
150 Patch provided by Eugene Bujak
152 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
153 Patch provided by Maxim Dounin
155 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
156 Patch provided by Phil Pennock
158 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
160 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
161 Patch provided by Brad "anomie" Jorsch
163 NM/14 Bugzilla 622: Added timeout setting to transport filter.
164 Patch provided by Dean Brooks
166 TK/05 Add native DKIM support (does not depend on external libraries).
168 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
169 Patch provided by Graeme Fowler
171 NM/16 Bugzilla 851: Documentation example syntax fix.
173 NM/17 Changed NOTICE file to remove references to embedded PCRE.
175 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
177 NM/19 Bugzilla 745: TLS version reporting
178 Patch provided by Phil Pennock
180 NM/20 Bugzilla 167: bool: condition support
181 Patch provided by Phil Pennock
183 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
184 Patch provided by Phil Pennock
186 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
187 Patch provided by Brad "anomie" Jorsch
189 NM/23 Bugzilla 687: Fix misparses in eximstats
190 Patch provided by Heiko Schlittermann
192 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
193 Patch provided by Heiko Schlittermann
195 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
196 plus update to original patch.
198 NM/26 Bugzilla 799: Documentation correction for ratelimit
200 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
201 Patch provided by David Brownlee
203 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
205 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
207 NM/30 Bugzilla 888: TLS documentation bugfixes
209 NM/31 Bugzilla 896: Dovecot buffer overrun fix
211 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
212 Unlike the original bugzilla I have changed all shell scripts in src tree
214 NM/33 Bugzilla 898: Transport filter timeout fix
215 Patch by Todd Rinaldo
217 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
218 Patch by Serge Demonchaux
220 NM/35 Bugzilla 39: Base64 decode bug fixes
221 Patch by Jakob Hirsch
223 NM/36 Bugzilla 909: Correct connect() call in dcc code
225 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
227 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
229 NM/39 Bugzilla 911: Fixed MakeLinks build script
235 TK/01 Add preliminary DKIM support. Currently requires a forked version of
236 ALT-N's libdkim that I have put here:
237 http://duncanthrax.net/exim-experimental/
239 Note to Michael Haardt: I had to rename some vars in sieve.c. They
240 were called 'true' and it seems that C99 defines that as a reserved
241 keyword to be used with 'bool' variable types. That means you could
242 not include C99-style headers which use bools without triggering
243 build errors in sieve.c.
245 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
246 as mailq or other aliases. Changed the --help handling significantly
247 to do whats expected. exim_usage() emits usage/help information.
249 SC/01 Added the -bylocaldomain option to eximstats.
251 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
253 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
255 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
261 PH/01 Another patch from the Sieve maintainer.
263 PH/02 When an IPv6 address is converted to a string for single-key lookup
264 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
265 dots are used instead of colons so that keys in lsearch files need not
266 contain colons. This was done some time before quoting was made available
267 in lsearch files. However, iplsearch files do require colons in IPv6 keys
268 (notated using the quote facility) so as to distinguish them from IPv4
269 keys. This meant that lookups for IP addresses in host lists did not work
270 for iplsearch lookups.
272 This has been fixed by arranging for IPv6 addresses to be expressed with
273 colons if the lookup type is iplsearch. This is not incompatible, because
274 previously such lookups could never work.
276 The situation is now rather anomolous, since one *can* have colons in
277 ordinary lsearch keys. However, making the change in all cases is
278 incompatible and would probably break a number of configurations.
280 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
283 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
284 conversion specification without a maximum field width, thereby enabling
285 a rogue spamd server to cause a buffer overflow. While nobody in their
286 right mind would setup Exim to query an untrusted spamd server, an
287 attacker that gains access to a server running spamd could potentially
288 exploit this vulnerability to run arbitrary code as the Exim user.
290 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
291 $primary_hostname instead of what libspf2 thinks the hosts name is.
293 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
294 a directory entry by the name of the lookup key. Previously, if a
295 symlink pointed to a non-existing file or a file in a directory that
296 Exim lacked permissions to read, a lookup for a key matching that
297 symlink would fail. Now it is enough that a matching directory entry
298 exists, symlink or not. (Bugzilla 503.)
300 PH/03 The body_linecount and body_zerocount variables are now exported in the
303 PH/04 Added the $dnslist_matched variable.
305 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
306 This means they are set thereafter only if the connection becomes
309 PH/06 Added the client_condition to authenticators so that some can be skipped
310 by clients under certain conditions.
312 PH/07 The error message for a badly-placed control=no_multiline_responses left
313 "_responses" off the end of the name.
315 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
317 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
318 (without spaces) instead of just copying the configuration text.
320 PH/10 Added the /noupdate option to the ratelimit ACL condition.
322 PH/11 Added $max_received_linelength.
324 PH/12 Added +ignore_defer and +include_defer to host lists.
326 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
327 way in which PCRE > 7.0 is built.
329 PH/14 Implemented queue_only_load_latch.
331 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
332 MAIL command. The effect was to mangle the value on 64-bit systems.
334 PH/16 Another patch from the Sieve maintainer.
336 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
338 PH/18 If a system quota error occurred while trying to create the file for
339 a maildir delivery, the message "Mailbox is full" was not appended to the
340 bounce if the delivery eventually timed out. Change 4.67/27 below applied
341 only to a quota excession during the actual writing of the file.
343 PH/19 It seems that peer DN values may contain newlines (and other non-printing
344 characters?) which causes problems in log lines. The DN values are now
345 passed through string_printing() before being added to log lines.
347 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
348 and InterBase are left for another time.)
350 PH/21 Added message_body_newlines option.
352 PH/22 Guard against possible overflow in moan_check_errorcopy().
354 PH/23 POSIX allows open() to be a macro; guard against that.
356 PH/24 If the recipient of an error message contained an @ in the local part
357 (suitably quoted, of course), incorrect values were put in $domain and
358 $local_part during the evaluation of errors_copy.
364 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
365 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
368 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
369 issue a MAIL command.
371 PH/02 In an ACL statement such as
373 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
375 if a client was not listed at all, or was listed with a value other than
376 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
377 the condition was not true (as it should be), so access was not denied.
378 The bug was that the ! inversion was incorrectly passed on to the second
379 item. This has been fixed.
381 PH/03 Added additional dnslists conditions == and =& which are different from
382 = and & when the dns lookup returns more than one IP address.
384 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
385 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
387 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
388 FSYNC, which compiles an option called disable_fsync that allows for
389 bypassing fsync(). The documentation is heavily laced with warnings.
391 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
393 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
394 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
395 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
396 including adding "make clean"; (3) Added -fPIC when compiling the test
397 dynamically loaded module, to get rid of a warning.
399 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
400 message fails, move_frozen_messages = true and ignore_bounce_errors_after
401 = 0s. The bug is otherwise harmless.
403 PH/07 There was a bug in the dovecot authenticator such that the value of
404 $auth1 could be overwritten, and so not correctly preserved, after a
405 successful authentication. This usually meant that the value preserved by
406 the server_setid option was incorrect.
408 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
410 PH/09 Installed PCRE release 7.0.
412 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
413 run for batched SMTP input. It is now run at the start of every message
414 in the batch. While fixing this I discovered that the process information
415 (output by running exiwhat) was not always getting set for -bs and -bS
416 input. This is fixed, and it now also says "batched" for BSMTP.
418 PH/11 Added control=no_pipelining.
420 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
421 patch, slightly modified), and move the expansion of helo_data till after
422 the connection is made in the smtp transport (so it can use these
425 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
427 PH/14 Added log_selector = +pid.
429 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
431 PH/16 Add ${if forany and ${if forall.
433 PH/17 Added dsn_from option to vary the From: line in DSNs.
435 PH/18 Flush SMTP output before performing a callout, unless control =
436 no_callout_flush is set.
438 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
439 was true (the default) a successful delivery failed to delete the retry
440 item, thus causing premature timeout of the address. The bug is now
443 PH/20 Added hosts_avoid_pipelining to the smtp transport.
445 PH/21 Long custom messages for fakedefer and fakereject are now split up
446 into multiline reponses in the same way that messages for "deny" and
447 other ACL rejections are.
449 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
450 with slight modification.
452 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
453 draft, changing the syntax and factoring some duplicate code".
455 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
456 for deliveries of the second and subsequent messages over the same SMTP
459 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
460 ${reduce, with only minor "tidies".
462 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
464 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
465 expansion side effects.
467 PH/27 When a message times out after an over-quota error from an Exim-imposed
468 quota, the bounce message says "mailbox is full". This message was not
469 being given when it was a system quota that was exceeded. It now should
472 MH/03 Made $recipients available in local_scan(). local_scan() already has
473 better access to the recipient list through recipients_list[], but
474 $recipients can be useful in postmaster-provided expansion strings.
476 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
477 in the case of a MAIL command with additional options following the
478 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
479 were accidentally chopped off.
481 PH/29 SMTP synchronization checks are implemented when a command is read -
482 there is a check that no more input is waiting when there shouldn't be
483 any. However, for some commands, a delay in an ACL can mean that it is
484 some time before the response is written. In this time, more input might
485 arrive, invalidly. So now there are extra checks after an ACL has run for
486 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
487 pipelining has not been advertised.
489 PH/30 MH's patch to allow iscntrl() characters to be list separators.
491 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
492 returned in the SMTP response when smtp_return_error_details was false.
495 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
496 instead of the C I/O that was originally supplied, because problems were
499 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
500 Exim which did not show up earlier: it was assuming that a call to
501 SSL_CTX_set_info_callback() might give an error value. In fact, there is
502 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
503 was a macro that became an assignment, so it seemed to work. This has
504 changed to a proper function call with a void return, hence the compile
505 error. Exim's code has been fixed.
507 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
510 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
512 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
514 PH/37 If a message is not accepted after it has had an id assigned (e.g.
515 because it turns out to be too big or there is a timeout) there is no
516 "Completed" line in the log. When some messages of this type were
517 selected by exigrep, they were listed as "not completed". Others were
518 picked up by some special patterns. I have improved the selection
519 criteria to be more general.
521 PH/38 The host_find_failed option in the manualroute router can now be set
522 to "ignore", to completely ignore a host whose IP address cannot be
523 found. If all hosts are ignored, the behaviour is controlled by the new
524 host_all_ignored option.
526 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
527 homing or because of multiple MX records with /mx) generated more than
528 one IP address, and the following item turned out to be the local host,
529 all the secondary addresses of the first item were incorrectly removed
530 from the list, along with the local host and any following hosts (which
531 is what is supposed to happen).
533 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
534 whoever called Exim into the -H file. In the case of the daemon it was
535 behaving confusingly. When first started, it used values for whoever
536 started the daemon, but after a SIGHUP it used the Exim user (because it
537 calls itself on a restart). I have changed the code so that it now always
540 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
541 message are rejected with the same error (e.g. no authentication or bad
542 sender address), and a DATA command is nevertheless sent (as can happen
543 with PIPELINING or a stupid MUA), the error message that was given to the
544 RCPT commands is included in the rejection of the DATA command. This is
545 intended to be helpful for MUAs that show only the final error to their
548 PH/42 Another patch from the Sieve maintainer.
550 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
551 Eximstats - Fixed some broken HTML links and added missing column headers
553 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
554 columns for Rejects, Temp Rejects, Ham, and Spam rows.
556 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
558 PH/43 Yet another patch from the Sieve maintainer.
560 PH/44 I found a way to check for a TCP/IP connection going away before sending
561 the response to the final '.' that terminates a message, but only in the
562 case where the client has not sent further data following the '.'
563 (unfortunately, this is allowed). However, in many cases there won't be
564 any further data because there won't be any more messages to send. A call
565 to select() can be used: if it shows that the input is "ready", there is
566 either input waiting, or the socket has been closed. An attempt to read
567 the next input character can distinguish the two cases. Previously, Exim
568 would have sent an OK response which the client would never have see.
569 This could lead to message repetition. This fix should cure that, at
570 least in a lot of common cases.
572 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
573 advertised in response to EHLO.
579 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
580 fixed by 4.65/MH/01 (is this a record?) are fixed:
582 (i) An empty string was always treated as zero by the numeric comparison
583 operators. This behaviour has been restored.
585 (ii) It is documented that the numeric comparison operators always treat
586 their arguments as decimal numbers. This was broken in that numbers
587 starting with 0 were being interpreted as octal.
589 While fixing these problems I realized that there was another issue that
590 hadn't been noticed. Values of message_size_limit (both the global option
591 and the transport option) were treated as octal if they started with 0.
592 The documentation was vague. These values are now always treated as
593 decimal, and I will make that clear in the documentation.
599 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
600 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
603 MH/01 Don't check that the operands of numeric comparison operators are
604 integers when their expansion is in "skipping" mode (fixes bug
605 introduced by 4.64-PH/07).
607 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
608 child addresses, Exim now panics and dies. Previously, because the count
609 is held in a short int, deliveries were likely to be lost. As such a
610 large number of recipients for a single message is ridiculous
611 (performance will be very, very poor), I have chosen to impose a limit
612 rather than extend the field.
618 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
619 leftover -K file (the existence of which was triggered by #402).
620 While we were at it, introduced process PID as part of the -K
621 filename. This should rule out race conditions when creating
624 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
625 processing considerably. Previous code took too long for large mails,
626 triggering a timeout which in turn triggers #401.
628 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
629 in the DK code in transports.c. sendfile() is not really portable,
630 hence the _LINUX specificness.
632 TF/01 In the add_headers option to the mail command in an Exim filter,
633 there was a bug that Exim would claim a syntax error in any
634 header after the first one which had an odd number of characters
637 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
638 callout verification, Exim cached a "reject" for the entire domain. This
639 is correct for most verifications, but it is not correct for a recipient
640 verification with use_sender or use_postmaster set, because in that case
641 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
642 case of MAIL FROM:<> rejection from other early rejections (e.g.
643 rejection of HELO). When verifying a recipient using a non-null MAIL
644 address, the cache is ignored if it shows MAIL FROM:<> rejection.
645 Whatever the result of the callout, the value of the domain cache is
646 left unchanged (for any other kind of callout, getting as far as trying
647 RCPT means that the domain itself is ok).
649 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
652 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
653 manifest itself as EPIPE rather than ECONNECT. When tidying away a
654 session, the daemon ignores ECONNECT errors and logs others; it now
655 ignores EPIPE as well.
657 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
658 (quoted-printable decoding).
660 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
661 later the small subsequent patch to fix an introduced bug.
663 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
665 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
667 PH/08 An error is now given if message_size_limit is specified negative.
669 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
670 to be given (somewhat) arbitrary names.
672 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
675 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
676 miscellaneous code fixes
678 PH/10 Added the log_reject_target ACL modifier to specify where to log
681 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
682 hostname. This is wrong, because it relates to the incoming message (and
683 probably the interface on which it is arriving) and not to the outgoing
684 callout (which could be using a different interface). This has been
685 changed to use the value of the helo_data option from the smtp transport
686 instead - this is what is used when a message is actually being sent. If
687 there is no remote transport (possible with a router that sets up host
688 addresses), $smtp_active_hostname is used.
690 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
691 tweaks were necessary in order to get it to work (see also 21 below):
692 (a) The code assumed that strncpy() returns a negative number on buffer
693 overflow, which isn't the case. Replaced with Exim's string_format()
695 (b) There were several signed/unsigned issues. I just did the minimum
696 hacking in of casts. There is scope for a larger refactoring.
697 (c) The code used strcasecmp() which is not a standard C function.
698 Replaced with Exim's strcmpic() function.
699 (d) The code set only $1; it now sets $auth1 as well.
700 (e) A simple test gave the error "authentication client didn't specify
701 service in request". It would seem that Dovecot has changed its
702 interface. Fortunately there's a specification; I followed it and
703 changed what the client sends and it appears to be working now.
705 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
708 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
709 address A is aliased to B and C, where B exists and C does not. Without
710 -v the output is "A verified" because verification stops after a
711 successful redirection if more than one address is generated. However,
712 with -v the child addresses are also verified. Exim was outputting "A
713 failed to verify" and then showing the successful verification for C,
714 with its parentage. It now outputs "B failed to verify", showing B's
715 parentage before showing the successful verification of C.
717 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
718 look up a TXT record in a specific list after matching in a combined
721 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
722 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
723 they consult the DNS. I had assumed they would set it the way they
724 wanted; and indeed my experiments on Linux seem to show that in some
725 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
726 To be on the safe side, however, I have now made the interface to
727 host_find_byname() similar to host_find_bydns(), with an argument
728 containing the DNS resolver options. The host_find_byname() function now
729 sets these options at its start, just as host_find_bydns() does. The smtp
730 transport options dns_qualify_single and dns_search_parents are passed to
731 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
732 of host_find_byname() use the default settings of RES_DEFNAMES
733 (qualify_single) but not RES_DNSRCH (search_parents).
735 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
736 spool_read_header() do less string testing, by means of a preliminary
737 switch on the second character of optional "-foo" lines. (This is
738 overdue, caused by the large number of possibilities that now exist.
739 Originally there were few.) While I was there, I also converted the
740 str(n)cmp tests so they don't re-test the leading "-" and the first
741 character, in the hope this might squeeze out yet more improvement.
743 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
744 flag allowing group syntax was set by the header_syntax check but not
745 turned off, possible causing trouble later; (2) The flag was not being
746 set at all for the header_verify test, causing "group"-style headers to
747 be rejected. I have now set it in this case, and also caused header_
748 verify to ignore an empty address taken from a group. While doing this, I
749 came across some other cases where the code for allowing group syntax
750 while scanning a header line wasn't quite right (mostly, not resetting
751 the flag correctly in the right place). These bugs could have caused
752 trouble for malformed header lines. I hope it is now all correct.
754 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
755 with the "reply" argument non-NULL. The code, however (which originally
756 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
757 but it didn't always do it. This confused somebody who was copying the
758 code for some other use. I have removed all the tests.
760 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
761 feature that was used to support insecure browsers during the U.S. crypto
762 embargo. It requires special client support, and Exim is probably the
763 only MTA that supported it -- and would never use it because real RSA is
764 always available. This code has been removed, because it had the bad
765 effect of slowing Exim down by computing (never used) parameters for the
766 RSA_EXPORT functionality.
768 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
769 authenticator to fail if there's a tab character in the incoming data
770 (there should never be unless someone is messing about, as it's supposed
771 to be base64-encoded). Also added, on Timo's advice, the "secured" option
772 if the connection is using TLS or if the remote IP is the same as the
773 local IP, and the "valid-client-cert option" if a client certificate has
776 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
777 authenticators. This can be used for authorization after authentication
778 succeeds. (In the case of plaintext, it servers for both authentication
781 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
782 if any retry times were supplied.
784 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
785 connection, where there is no client IP address to check. In this
786 situation, the verify now always succeeds.
788 PH/25 Applied John Jetmore's -Mset patch.
790 PH/26 Added -bem to be like -Mset, but loading a message from a file.
792 PH/27 In a string expansion for a processed (not raw) header when multiple
793 headers of the same name were present, leading whitespace was being
794 removed from all of them, but trailing whitespace was being removed only
795 from the last one. Now trailing whitespace is removed from each header
796 before concatenation. Completely empty headers in a concatenation (as
799 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
800 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
802 PH/29 [Removed. This was a change that I later backed out, and forgot to
803 correct the ChangeLog entry (that I had efficiently created) before
804 committing the later change.]
806 PH/30 Exim was sometimes attempting to deliver messages that had suffered
807 address errors (4xx response to RCPT) over the same connection as other
808 messages routed to the same hosts. Such deliveries are always "forced",
809 so retry times are not inspected. This resulted in far too many retries
810 for the affected addresses. The effect occurred only when there were more
811 hosts than the hosts_max_try setting in the smtp transport when it had
812 the 4xx errors. Those hosts that it had tried were not added to the list
813 of hosts for which the message was waiting, so if all were tried, there
814 was no problem. Two fixes have been applied:
816 (i) If there are any address or message errors in an SMTP delivery, none
817 of the hosts (tried or untried) are now added to the list of hosts
818 for which the message is waiting, so the message should not be a
819 candidate for sending over the same connection that was used for a
820 successful delivery of some other message. This seems entirely
821 reasonable: after all the message is NOT "waiting for some host".
822 This is so "obvious" that I'm not sure why it wasn't done
823 previously. Hope I haven't missed anything, but it can't do any
824 harm, as the worst effect is to miss an optimization.
826 (ii) If, despite (i), such a delivery is accidentally attempted, the
827 routing retry time is respected, so at least it doesn't keep
828 hammering the server.
830 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
831 in ${readsocket because some servers need this prod.
833 PH/32 Added some extra debug output when updating a wait-xxx database.
835 PH/33 The hint "could be header name not terminated by colon", which has been
836 given for certain expansion errors for a long time, was not being given
837 for the ${if def:h_colon_omitted{... case.
839 PH/34 The spec says: "With one important exception, whenever a domain list is
840 being scanned, $domain contains the subject domain." There was at least
841 one case where this was not true.
843 PH/35 The error "getsockname() failed: connection reset by peer" was being
844 written to the panic log as well as the main log, but it isn't really
845 panic-worthy as it just means the connection died rather early on. I have
846 removed the panic log writing for the ECONNRESET error when getsockname()
849 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
850 runs only) independently of the message's sender address. This meant
851 that, if the 4xx error was in fact related to the sender, a different
852 message to the same recipient with a different sender could confuse
853 things. In particualar, this can happen when sending to a greylisting
854 server, but other circumstances could also provoke similar problems.
855 I have changed the default so that the retry time for these errors is now
856 based a combination of the sender and recipient addresses. This change
857 can be overridden by setting address_retry_include_sender=false in the
860 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
861 remote server are returned as part of bounce messages. This was not
862 happening for LMTP over a pipe (the lmtp transport), but now it is the
863 same for both kinds of LMTP.
865 PH/38 Despite being documented as not happening, Exim was rewriting addresses
866 in header lines that were in fact CNAMEs. This is no longer the case.
868 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
869 and queue runs started by the daemon processed all messages. This has
870 been fixed so that -R and -S can now usefully be given with -q<time>.
872 PH/40 Import PCRE release 6.7 (fixes some bugs).
874 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
876 PH/42 Give an error if -q is specified more than once.
878 PH/43 Renamed the variables $interface_address and $interface_port as
879 $received_ip_address and $received_port, to make it clear that these
880 values apply to message reception, and not to the outgoing interface when
881 a message is delivered. (The old names remain recognized, of course.)
883 PH/44 There was no timeout on the connect() call when using a Unix domain
884 socket in the ${readsocket expansion. There now is.
886 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
887 be meaningful with "accept".
889 SC/01 Eximstats V1.43
890 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
892 SC/02 Eximstats V1.44
893 Use a glob alias rather than an array ref in the generated
894 parser. This improves both readability and performance.
896 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
897 Collect SpamAssassin and rejection statistics.
898 Don't display local sender or destination tables unless
899 there is data to show.
900 Added average volumes into the top table text output.
902 SC/04 Eximstats V1.46
903 Collect data on the number of addresses (recipients)
904 as well as the number of messages.
906 SC/05 Eximstats V1.47
907 Added 'Message too big' to the list of mail rejection
908 reasons (thanks to Marco Gaiarin).
910 SC/06 Eximstats V1.48
911 Mainlog lines which have GMT offsets and are too short to
912 have a flag are now skipped.
914 SC/07 Eximstats V1.49 (Alain Williams)
915 Added the -emptyok flag.
917 SC/08 Eximstats V1.50
918 Fixes for obtaining the IP address from reject messages.
920 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
921 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
922 whitesspace changes from 4.64-PH/27
924 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
927 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
928 are found, allow negative numbers in numeric criteria)
930 JJ/06 exipick.20061117.2, added new $message_body_missing variable
932 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
933 to match changes made in 4.64-PH/43
935 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
937 PH/47 Put in an explicit test for a DNS lookup of an address record where the
938 "domain" is actually an IP address, and force a failure. This locks out
939 those revolvers/nameservers that support "A-for-A" lookups, in
940 contravention of the specifications.
942 PH/48 When a host name was looked up from an IP address, and the subsequent
943 forward lookup of the name timed out, the host name was left in
944 $sender_host_name, contrary to the specification.
946 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
947 restricted to single-key lookups, Exim was not diagnosing an error if
948 * or *@ was used with a query-style lookup.
950 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
952 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
953 long ago, but noone interested enough thought of it. Let's just say that
954 the "1.1" means that there are some new functions that weren't there at
955 some point in the past.
957 PH/51 Error processing for expansion failure of helo_data from an smtp
958 transport during callout processing was broken.
960 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
961 tested/used via the -bh/-bhc/-bs options.
963 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
964 bug, fixed in subsequent PCRE releases).
966 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
967 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
969 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
975 SC/01 Use a glob alias rather than an array ref in eximstats generated
976 parser. This improves both readability and performance.
978 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
979 Don't display local sender or destination tables in eximstats unless
980 there is data to show.
981 Added average volumes into the eximstats top table text output.
983 SC/03 Collect data on the number of addresses (recipients) as well
984 as the number of messages in eximstats.
986 TF/01 Correct an error in the documentation for the redirect router. Exim
987 does (usually) call initgroups() when daemonizing.
989 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
990 with consistent privilege compared to when running as a daemon.
992 TF/03 Note in the spec that $authenticated_id is not set for local
993 submissions from trusted users.
995 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
996 Thanks to Dean Brooks <dean@iglou.com> for the patch.
998 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
999 by adding some example configuration directives to the default
1000 configuration file. A little bit of work is required to uncomment the
1001 directives and define how usernames and passwords are checked, but
1002 there is now a framework to start from.
1004 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1005 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1006 without this. I don't know how relevant this is to other LDAP libraries.
1008 PH/02 Add the verb name to the "unknown ACL verb" error.
1010 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1012 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1014 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1015 directory not expanded when it should be if an expanded home directory
1016 was set for the address (which is overridden by the transport).
1018 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1021 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1022 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1023 because it is too late at that time, and has no effect.
1025 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1026 security issue with \' (bugzilla #107). I could not use the
1027 PQescapeStringConn() function, because it needs a PGconn value as one of
1030 PH/08 When testing addresses using -bt, indicate those final addresses that
1031 are duplicates that would not cause an additional delivery. At least one
1032 person was confused, thinking that -bt output corresponded to deliveries.
1033 (Suppressing duplicates isn't a good idea as you lose the information
1034 about possibly different redirections that led to the duplicates.)
1036 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1037 systems where poll() doesn't work, in particular OS X.
1039 PH/10 Added more information to debugging output for retry time not reached.
1041 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1042 operations in malware.c.
1044 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1047 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1048 syslog_duplication set false, log lines that would normally be written
1049 both the the main log and to the reject log were not written to syslog at
1052 PH/14 In the default configuration, change the use of "message" in ACL warn
1053 statements to "add_header".
1055 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1056 not followed by a command (e.g. "seen endif").
1058 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1059 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1062 PH/17 Added extra conditions to the default value of delay_warning_condition
1066 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1067 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1068 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1071 The Auto-Submitted: and various List- headers are standardised, whereas I
1072 don't think Precedence: ever was.
1074 PH/18 Refactored debugging code in route_finduser() to show more information,
1075 in particular, the error code if getpwnam() issues one.
1077 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1078 This is apparently needed in addition to the PH/07 change above to avoid
1079 any possible encoding problems.
1081 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1082 but not after initializing Perl.
1084 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1085 output them only if debugging. By default they are written stderr,
1086 apparently, which is not desirable.
1088 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1091 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1094 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1096 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1097 authenticated or an ident call has been made. Suppress the default
1098 values for $authenticated_id and $authenticated_sender (but permit -oMai
1099 and -oMas) when testing with -bh.
1101 PH/24 Re-jigged the order of the tests in the default configuration so that the
1102 tests for valid domains and recipients precede the DNS black list and CSA
1103 tests, on the grounds that those ones are more expensive.
1105 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1106 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1107 This bug exists in every version of Exim that I still have, right back to
1110 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1111 However, an attempt to turn on case-sensitivity in a regex key by
1112 including (?-i) didn't work because the subject string was already
1113 lowercased, and the effects were non-intuitive. It turns out that a
1114 one-line patch can be used to allow (?-i) to work as expected.
1120 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1121 other effects) broke the use of negated acl sub-conditions.
1123 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1126 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1127 "Deny" causes Exim to reject the incoming connection with a 554 error.
1128 Unfortunately, if there is a major crisis, such as a disk failure,
1129 tcp-wrappers gives "deny", whereas what one would like would be some
1130 kind of temporary error. A kludge has been added to help with this.
1131 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1132 554 error is used if errno is still zero or contains ENOENT (which occurs
1133 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1136 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1138 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1139 errors. Otherwise a message that provokes a temporary error (when other
1140 messages do not) can cause a whole host to time out.
1142 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1143 addresses were routed directly to files or pipes from a redirect router.
1144 File deliveries just didn't batch; pipe deliveries might have suffered
1147 PH/06 A failure to get a lock for a hints database would erroneously always say
1148 "Failed to get write lock", even when it was really a read lock.
1150 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1151 of 0600. This has been changed to use the value of the lockfile_mode
1152 option (which defaults to 0600).
1154 PH/08 Applied small patch from the Sieve maintainer.
1156 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1157 folder from quota calculations, a direct delivery into this folder messed
1158 up the contents of the maildirsize file. This was because the regex was
1159 used only to exclude .Trash (or whatever) when the size of the mailbox
1160 was calculated. There was no check that a delivery was happening into an
1161 excluded directory. This bug has been fixed by ignoring all quota
1162 processing for deliveries into excluded directories.
1164 PH/10 Added the maildirfolder_create_regex option to appendfile.
1170 PH/01 The code for finding all the local interface addresses on a FreeBSD
1171 system running IPv6 was broken. This may well have applied to all BSD
1172 systems, as well as to others that have similar system calls. The broken
1173 code found IPv4 interfaces correctly, but gave incorrect values for the
1174 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1175 that it would not match correctly against @[] and not recognize the IPv6
1178 PH/02 The ipliteral router was not recognizing addresses of the form user@
1179 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1181 PH/03 Added disable_ipv6.
1183 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1184 decoded form, because it is most often used to construct To: headers
1185 lines in autoreplies, and the decoded form may well be syntactically
1186 invalid. However, $reply_address has leading white space removed, and all
1187 newlines turned into spaces so that the autoreply transport does not
1190 PH/05 If group was specified without a user on a router, and no group or user
1191 was specified on a transport, the group from the router was ignored.
1193 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1194 for visible compile-time settings that can be used to change these
1195 numbers, for those that want even more. Backwards compatibility with old
1196 spool files has been maintained. However, going back to a previous Exim
1197 release will lost any variables that are in spool files.
1199 PH/07 Two small changes when running in the test harness: increase delay when
1200 passing a TCP/IP connection to a new process, in case the original
1201 process has to generate a bounce, and remove special handling of
1202 127.0.0.2 (sic), which is no longer necessary.
1204 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1205 be the same on different OS.
1207 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1210 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1211 whether --show-vars was specified or not
1213 JJ/02 exipick: Added support for new ACL variable spool format introduced
1216 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1217 syntactically invalid From: or Reply-to: line, and a filter used this to
1218 generate an autoreply, and therefore failed to obtain an address for the
1219 autoreply, Exim could try to deliver to a non-existent relative file
1220 name, causing unrelated and misleading errors. What now happens is that
1221 it logs this as a hard delivery error, but does not attempt to create a
1224 PH/11 The exinext utility has a -C option for testing purposes, but although
1225 the given file was scanned by exinext itself; it wasn't being passed on
1226 when Exim was called.
1228 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1229 an end-of-file indication when reading a command response.
1231 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1232 compiled. In many other places in Exim, IPv6 addresses are always
1233 recognized, so I have changed this. It also means that IPv4 domain
1234 literals of the form [IPV4:n.n.n.n] are now always recognized.
1236 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1237 used if the router is not running as root, for example, when verifying at
1238 ACL time, or when using -bh. The debugging output from this situation was
1239 non-existent - all you got was a failure to exec. I have made two
1242 (a) Failures to set uid/gid, the current directory, or a process leader
1243 in a subprocess such as that created by queryprogram now generate
1244 suitable debugging ouput when -d is set.
1246 (b) The queryprogram router detects when it is not running as root,
1247 outputs suitable debugging information if -d is set, and then runs
1248 the subprocess without attempting to change uid/gid.
1250 PH/15 Minor change to Makefile for building test_host (undocumented testing
1253 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1254 additional section of a DNS packet that returns MX or SRV records.
1255 Instead, it always explicitly searches for A/AAAA records. This avoids
1256 major problems that occur when a DNS server includes only records of one
1257 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1258 fixed another bug: if SRV records were looked up and the corresponding
1259 address records were *not* found in the additional section, the port
1260 values from the SRV records were lost.
1262 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1263 using the correct key (the original address) when searching the retry
1264 rules in order to find which one to use for generating the retry hint.
1266 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1267 adding the default one. Similarly, if it contains a Reply-To: header, the
1268 errors_reply_to option, if set, is not used.
1270 PH/19 When calculating a retry time, Exim used to measure the "time since
1271 failure" by looking at the "first failed" field in the retry record. Now
1272 it does not use this if it is later than than the arrival time of the
1273 message. Instead it uses the arrival time. This makes for better
1274 behaviour in cases where some deliveries succeed, thus re-setting the
1275 "first failed" field. An example is a quota failure for a huge message
1276 when small messages continue to be delivered. Without this change, the
1277 "time since failure" will always be short, possible causing more frequent
1278 delivery attempts for the huge message than are intended.
1279 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1281 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1282 $1, $2, $3) because the numerical variables can be reset during some
1283 expansion items (e.g. "match"), thereby losing the authentication data.
1285 PH/21 Make -bV show the size of off_t variables so that the test suite can
1286 decide whether to run tests for quotas > 2G.
1288 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1289 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1290 filecount value is greater than 2G or if a quota value is greater than 2G
1291 on a system where the size of off_t is not greater than 4, a panic error
1294 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1295 never match. The debug and -bh output now contains an explicit error
1296 message indicating a malformed IPv4 address or mask.
1298 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1299 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1300 PH/23 above applies.
1302 PH/25 Do not write to syslog when running in the test harness. The only
1303 occasion when this arises is a failure to open the main or panic logs
1304 (for which there is an explicit test).
1306 PH/26 Added the /no_tell option to "control=freeze".
1308 PH/27 If a host name lookup failed very early in a connection, for example, if
1309 the IP address matched host_lookup and the reverse lookup yielded a name
1310 that did not have a forward lookup, an error message of the form "no IP
1311 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1312 could be logged. Now it outputs the IP address instead of "NULL".
1314 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1315 allows the sender and the authenticated sender to be set when
1316 submitting a message from within Exim. Since child_open_exim() is
1317 documented for local_scan(), the new function should be too.
1319 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1320 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1321 results in an empty string is now treated as unset.
1323 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1325 PH/31 Added sender_verify_fail logging option.
1327 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1328 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1329 tidied the source and removed it altogether.
1331 PH/33 When a queue run was abandoned because the load average was too high, a
1332 log line was always written; now it is written only if the queue_run log
1333 selector is set. In addition, the log line for abandonment now contains
1334 information about the queue run such as the pid. This is always present
1335 in "start" and "stop" lines but was omitted from the "abandon" line.
1337 PH/34 Omit spaces between a header name and the colon in the error message that
1338 is given when verify = headers_syntax fails (if there are lots of them,
1339 the message gets confusing).
1341 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1342 names, as there are now some PTR records that contain slashes. This check
1343 is only to protect against broken name servers that fall over on strange
1344 characters, so the fact that it applies to all lookups doesn't matter.
1346 PH/36 Now that the new test suite is complete, we can remove some of the
1347 special code in Exim that was needed for the old test suite. For example,
1348 sorting DNS records because real resolvers return them in an arbitrary
1349 order. The new test suite's fake resolver always returns records in the
1352 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1353 bounces) except when queue_only is set, to avoid logging races between
1354 the different processes.
1356 PH/38 Panic-die if .include specifies a non-absolute path.
1358 PH/39 A tweak to the "H" retry rule from its user.
1360 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1361 a label. They prevented compilation on older perls.
1363 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1364 a warning to be raised on newish perls.
1366 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1367 on queue. Changes to match documented behaviour of showing count of
1368 messages matching specified criteria.
1370 PH/40 Changed the default ident timeout from 30s to 5s.
1372 PH/41 Added support for the use of login_cap features, on those BSD systems
1373 that have them, for controlling the resources used by pipe deliveries.
1375 PH/42 The content-scanning code uses fopen() to create files in which to put
1376 message data. Previously it was not paying any attention to the mode of
1377 the files. Exim runs with umask(0) because the rest of the code creates
1378 files with open(), and sets the required mode explicitly. Thus, these
1379 files were ending up world-writeable. This was not a big issue, because,
1380 being within the spool directory, they were not world-accessible. I have
1381 created a function called modefopen, which takes an additional mode
1382 argument. It sets umask(777), creates the file, chmods it to the required
1383 mode, then resets the umask. All the relevant calls to fopen() in the
1384 content scanning code have been changed to use this function.
1386 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1387 to 24 hours. This avoids potential overflow problems when processing G
1388 and H retry rules. I suspect nobody ever tinkers with this value.
1390 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1392 PH/45 When the plaintext authenticator is running as a client, the server's
1393 challenges are checked to ensure they are valid base64 strings. By
1394 default, the authentication attempt is cancelled if an invalid string is
1395 received. Setting client_ignore_invalid_base64 true ignores these errors.
1396 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1397 they are received. Thus, the responses can be made to depend on the
1398 challenges. If an invalid string is ignored, an empty string is placed in
1401 PH/46 Messages that are created by the autoreply transport now contains a
1402 References: header, in accordance with RFCs 2822 and 3834.
1404 PH/47 Added authenticated_sender_force to the smtp transport.
1406 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1408 PH/49 Installed latest patch from the Sieve maintainer.
1410 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1411 was also set, the appendfile transport was unnecessarily scanning a
1412 directory of message files (e.g. for maildir delivery) to find the count
1413 of files (along with the size), even though it did not need this
1414 information. It now does the scan only if it needs to find either the
1415 size of the count of files.
1417 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1419 PH/52 Two bugs concerned with error handling when the smtp transport is
1422 (i) Exim was not creating retry information for temporary errors given
1423 for individual recipients after the DATA command when the smtp transport
1424 was used in LMTP mode. This meant that they could be retried too
1425 frequently, and not timed out correctly.
1427 (ii) Exim was setting the flag that allows error details to be returned
1428 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1429 recipients that were returned after the DATA command.
1431 PH/53 This is related to PH/52, but is more general: for any failing address,
1432 when detailed error information was permitted to be returned to the
1433 sender, but the error was temporary, then after the final timeout, only
1434 "retry timeout exceeded" was returned. Now it returns the full error as
1435 well as "retry timeout exceeded".
1437 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1438 do this, and (what is worse) MTAs that accept it.
1440 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1441 will now be deprecated.
1443 PH/56 New os.c-cygwin from the Cygwin maintainer.
1445 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1446 formats (previously only available in exim formats via -bpr, -bpru,
1447 and -bpra. Now also available in native and exiqgrep formats)
1449 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1450 with very large, slow to parse queues
1452 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1454 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1456 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1457 responses to authentication challenges, though it was showing the
1458 challenges; (ii) I've removed the CR characters from the debug output for
1461 PH/58 Allow for the insertion of a newline as well as a space when a string
1462 is turned into more than one encoded-word during RFC 2047 encoding. The
1463 Sieve code now uses this.
1465 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1466 data_4xx, lost_connection, tls_required.
1468 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1469 message was being sent as an SMTP response.
1471 PH/61 Add -l and -k options to exicyclog.
1473 PH/62 When verifying, if an address was redirected to one new address, so that
1474 verification continued, and the new address failed or deferred after
1475 having set something in $address_data, the value of $address_data was not
1476 passed back to the ACL. This was different to the case when no
1477 redirection occurred. The value is now passed back in both cases.
1479 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1480 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1481 use login_cap.h, so on its own it isn't the distinguishing feature. The
1482 new name refers directly to the setclassresources() function.
1484 PH/65 Added configuration files for NetBSD3.
1486 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1488 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1489 is preferred over IPv4.
1491 PH/68 The bounce_return_message and bounce_return_body options were not being
1492 honoured for bounces generated during the reception of non-SMTP messages.
1493 In particular, this applied to messages rejected by the ACL. This bug has
1494 been fixed. However, if bounce_return_message is true and bounce_return_
1495 body is false, the headers that are returned for a non-SMTP message
1496 include only those that have been read before the error was detected.
1497 (In the case of an ACL rejection, they have all been read.)
1499 PH/69 The HTML version of the specification is now built in a directory called
1500 spec_html instead of spec.html, because the latter looks like a path with
1501 a MIME-type, and this confuses some software.
1503 PH/70 Catch two compiler warnings in sieve.c.
1505 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1506 function verify_get_ident() calls ip_connect() to connect a socket, but
1507 if the "connect()" function timed out, ip_connect() used to close the
1508 socket. However, verify_get_ident() also closes the socket later, and in
1509 between Exim writes to the log, which may get opened at this point. When
1510 the socket was closed in ip_connect(), the log could get the same file
1511 descriptor number as the socket. This naturally causes chaos. The fix is
1512 not to close the socket in ip_connect(); the socket should be closed by
1513 the function that creates it. There was only one place in the code where
1514 this was missing, in the iplookup router, which I don't think anybody now
1515 uses, but I've fixed it anyway.
1517 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1518 well as to direct DNS lookups. Otherwise the handling of names in host
1519 lists is inconsistent and therefore confusing.
1525 PH/01 Two changes to the default runtime configuration:
1527 (1) Move the checks for relay_from_hosts and authenticated clients from
1528 after to before the (commented out) DNS black list checks.
1530 (2) Add control=submission to the relay_from_hosts and authenticated
1531 clients checks, on the grounds that messages accepted by these
1532 statements are most likely to be submissions.
1534 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1536 (1) Generate an error if the third argument for the ${prvs expansion is
1539 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1542 (3) Reset the variables that are obtained from the first argument of
1543 ${prvscheck and used in the second argument before leaving the code,
1544 because their memory is reclaimed, so using them afterwards may do
1547 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1548 one (it's much easier than Tom thought :-).
1550 (5) Because of (4), we can now allow for the use of $prvscheck_result
1551 inside the third argument.
1553 PH/03 For some reason, the default setting of PATH when running a command from
1554 a pipe transport was just "/usr/bin". I have changed it to
1557 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1558 anything to be listed in the output from -bV.
1560 PH/05 When a filter generated an autoreply, the entire To: header line was
1561 quoted in the delivery log line, like this:
1563 => >A.N.Other <ano@some.domain> <original@ddress> ...
1565 This has been changed so that it extracts the operative address. There
1566 may be more than one such address. If so, they are comma-separated, like
1569 => >ano@some.domain,ona@other.domain <original@ddress> ...
1571 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1572 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1573 not being looked up in the rDNS to get a host name, Exim was showing the
1574 IP address twice in Received: lines, even though the IP addresses were
1575 identical. For example:
1577 Received: from [1.2.3.4] (helo=[1.2.3.4])
1579 However, if the real host name was known, it was omitting the HELO data
1580 if it matched the actual IP address. This has been tidied up so that it
1581 doesn't show the same IP address twice.
1583 PH/07 When both +timestamp and +memory debugging was on, the value given by
1584 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1585 called by the debug printing, thereby overwriting the timestamp buffer.
1586 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1588 PH/08 When the original message was included in an autoreply transport, it
1589 always said "this is a copy of the message, including all the headers",
1590 even if body_only or headers_only was set. It now gives an appropriate
1593 PH/09 Applied a patch from the Sieve maintainer which:
1595 o fixes some comments
1596 o adds the (disabled) notify extension core
1597 o adds some debug output for the result of if/elsif tests
1598 o points to the current vacation draft in the documentation
1599 and documents the missing references header update
1603 o fixes a bug in processing the envelope test (when testing
1604 multiple envelope elements, the last element determinted the
1607 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1608 Electronic Mail") by including:
1610 Auto-submitted: auto-generated
1612 in the messages that it generates (bounce messages and others, such as
1613 warnings). In the case of bounce messages for non-SMTP mesages, there was
1614 also a typo: it was using "Auto_submitted" (underscore instead of
1615 hyphen). Since every message generated by Exim is necessarily in response
1616 to another message, thes have all been changed to:
1618 Auto-Submitted: auto-replied
1620 in accordance with these statements in the RFC:
1622 The auto-replied keyword:
1624 - SHOULD be used on messages sent in direct response to another
1625 message by an automatic process,
1627 - MUST NOT be used on manually-generated messages,
1629 - MAY be used on Delivery Status Notifications (DSNs) and Message
1630 Disposition Notifications (MDNs),
1632 - MUST NOT be used on messages generated by automatic or periodic
1633 processes, except for messages which are automatic responses to
1636 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1637 to the default Received: header definition.
1639 PH/12 Added log selector acl_warn_skipped (default on).
1641 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1642 variables because (a) they are in the wrong storage pool and (b) even if
1643 they were copied, it wouldn't work properly because of the caching.
1645 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1646 checking when decoding. Apparently there are clients that generate
1647 overlong encoded strings. Why am I not surprised?
1649 PH/15 If the first argument of "${if match_address" was not empty, but did not
1650 contain an "@" character, Exim crashed. Now it writes a panic log message
1651 and treats the condition as false.
1653 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1655 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1656 extension "envelope-auth". The code is finished and in agreement with
1657 other implementations, but there is no documentation so far and in fact,
1658 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1659 not changing the active code.
1661 Print executed "if" and "elsif" statements when debugging is used. This
1662 helps a great deal to understand what a filter does.
1664 Document more things not specified clearly in RFC3028. I had all this
1665 sorted out, when out of a sudden new issues came to my mind. Oops."
1667 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1670 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1671 canonical form (as documented). However, after a host name lookup from
1672 the IP address, check_host() was doing a simple string comparison with
1673 addresses acquired from the DNS when checking that the found name did
1674 have the original IP as one of its addresses. Since any found IPv6
1675 addresses are likely to be in abbreviated form, the comparison could
1676 fail. Luckily, there already exists a function for doing the comparison
1677 by converting both addresses to binary, so now that is used instead of
1678 the text comparison.
1680 PH/20 There was another similar case to PH/19, when a complete host name was
1681 given in a host list; looking up its IP address could give an abbreviated
1682 form, whereas the current host's name might or might not be abbreviated.
1683 The same fix has been applied.
1689 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1690 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1693 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1694 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1696 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1698 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1699 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1700 Also, for "Auto-Submitted", treat anything other than "no" as
1701 non-personal, in accordance with RFC 3834. (Previously it treated
1702 anything starting "auto-" as non-personal.)
1704 TF/01 The control=submission/name=... option had a problem with syntax
1705 errors if the name included a slash character. The /name= option
1706 now slurps the rest of the string, so it can include any characters
1707 but it must come last in the list of options (after /sender_retain
1710 PH/05 Some modifications to the interface to the fake nameserver for the new
1718 TK/01 Added the "success_on_redirect" address verification option. See
1719 NewStuff for rationale and an example.
1721 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1723 PH/02 Patch to exigrep to allow it to work on syslog lines.
1725 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1726 fread() to skip over the body file's header line, because in Cygwin the
1727 header line is locked and is inaccessible.
1729 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1730 co-exist for some time) to make it clear that it is the Exim ID that is
1731 referenced, not the Message-ID: header line.
1733 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1734 string_format() function, because snprintf() does not exist on all
1737 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1738 ${stat: expansion item.
1740 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1741 protocol synchronization error", to keep the pedants happy.
1743 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1744 well as for IRIX systems, when gcc is being used. See the host.c source
1747 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1749 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1752 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1753 transport and to the smtp transport in LMTP mode.
1755 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1757 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1758 run a filter in a subprocess. This could lead to confusion in subsequent
1759 lookups in the parent process. There should also be a search_tidyup() at
1760 the end of the subprocess.
1762 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1763 only if the host matched helo_try_verify_hosts, which caused the
1764 verification to occur when the EHLO/HELO command was issued. The ACL just
1765 tested the remembered result. Now, if a previous verification attempt has
1766 not happened, "verify = helo" does it there and then.
1768 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1770 TK/03 Fix log output including CR from clamd.
1772 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1773 exist provoked a memory error which could cause a segfault.
1775 PH/15 Installed PCRE 6.2
1777 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1779 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1780 of the problem. Specifically, suggested +O2 rather than +O1 for the
1783 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1785 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1786 record, the port was not correctly logged when the outgoing_port log
1787 selector was set (it logged the transort's default port).
1789 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1790 fallback_hosts, and "hosts" in the smtp transport.
1792 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1793 host errors such as "Connection refused".
1795 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1796 authentication with radiusclient 0.4.9:
1798 - Error returned from rc_read_config was caught wrongly
1799 - Username/password not passed on to radius server due to wrong length.
1801 The presumption is that some radiusclient API changes for 4.51/PH/17
1802 were not taken care of correctly. The code is still untested by me (my
1803 Linux distribution still has 0.3.2 of radiusclient), but it was
1804 contributed by a Radius user.
1806 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1807 expanding the "port" option of the smtp transport.
1809 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1810 while reading a MIME header. Thanks to Tom Hughes for a patch.
1812 PH/24 Include config.h inside local_scan.h so that configuration settings are
1815 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1816 that in an ACL for RCPT (for example), you can examine exactly what was
1819 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1820 commands, but it was not correctly comparing the address with the actual
1821 client host address. Thus, it would show the EHLO address in Received:
1822 header lines when this was not necessary.
1824 PH/27 Added the % operator to ${eval:}.
1826 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1827 it should be ignoring failures (because with -C, for example, it has lost
1828 privilege). It wasn't ignoring creation failures other than "already
1831 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1834 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1835 because an input line was too long, either on its own, or by virtue of
1836 too many continuations, the temporary file was not being removed, and the
1837 return code was incorrect.
1839 PH/31 Missing "BOOL" in function definition in filtertest.c.
1841 PH/32 Applied Sieve patches from the maintainer.
1843 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1845 PH/33 Added "verify = not_blind".
1847 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1848 Local/Makefile (with some defaults set). These are used in built scripts
1849 such as exicyclog, but they have never been used in the exim_install
1850 script (though there are many overriding facilities there). I have
1851 arranged that the exim_install script now takes note of these two
1854 PH/35 Installed configuration files for Dragonfly.
1856 PH/36 When a locally submitted message by a trusted user did not contain a
1857 From: header, and the sender address was obtained from -f or from an SMTP
1858 MAIL command, and the trusted user did not use -F to supply a sender
1859 name, $originator_name was incorrectly used when constructing a From:
1860 header. Furthermore, $originator_name was used for submission mode
1861 messages from external hosts without From: headers in a similar way,
1862 which is clearly wrong.
1864 PH/37 Added control=suppress_local_fixups.
1866 PH/38 When log_selector = +received_sender was set, and the addition of the
1867 sender made the log line's construction buffer exactly full, or one byte
1868 less than full, an overflow happened when the terminating "\n" was
1871 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1872 when the result of a list match is failure because a DNS lookup failed.
1874 PH/40 RM_COMMAND is now used in the building process.
1876 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1877 the "build-* directories that it finds.
1879 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1880 address in a domain literal was a prefix of an interface address.
1882 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1883 when verifying a sender address, unless rewrite_headers is false.
1885 PH/44 Wrote a long comment about why errors_to addresses are verified as
1886 recipients, not senders.
1888 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1889 the ratelimit ACL was added.
1891 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1893 PH/46 Added extra information about PostgreSQL errors to the error string.
1895 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1896 avoiding the need to install special zones in a real server. This is
1897 backwards compatible; if it can't find the fake resolver, it drops back.
1898 Thus, both old and new test suites can be run.
1900 TF/02 Added util/ratelimit.pl
1902 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1903 clock is set back in time.
1905 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1906 Candler <B.Candler@pobox.com>.
1908 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1909 OK for addresses that are the result of redirections.
1911 PH/48 A number of further additions for the benefit of the new test suite,
1912 including a fake gethostbyname() that interfaces to the fake DNS resolver
1915 TF/06 The fix for widen_domains has also been applied to qualify_single and
1916 search_parents which are the other dnslookup options that can cause
1919 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1922 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1924 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1925 service" if it encountered an MX record with an empty target hostname.
1926 The message is now "an MX or SRV record indicated no SMTP service".
1928 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1929 if the DNS of the sending site is misconfigured. This is quite a
1930 common situation. This change restores the behaviour of treating a
1931 helo verification defer as a failure.
1933 PH/51 If self=fail was set on a router, the bounce message did not include the
1934 actual error message.
1940 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1942 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1943 command itself ended in error, the underlying message about the transport
1944 filter timeout was being overwritten with the pipe command error. Now the
1945 underlying error message should be appended to the second error message.
1947 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1949 PH/02 Reduce the amount of output that "make" produces by default. Full output
1950 can still be requested.
1952 PH/03 The warning log line about a condition test deferring for a "warn" verb
1953 was being output only once per connection, rather than after each
1954 occurrence (because it was using the same function as for successful
1955 "warn" verbs). This seems wrong, so I have changed it.
1957 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1958 it should not have, which might have caused a crash in the right
1959 circumstances, but probably never did.
1961 PH/04 Installed a modified version of Tony Finch's patch to make submission
1962 mode fix the return path as well as the Sender: header line, and to
1963 add a /name= option so that you can make the user's friendly name appear
1966 TF/03 Added the control = fakedefer ACL modifier.
1968 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1969 Mark Lowes for thorough testing.
1971 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1973 TK/03 Merged latest SRS patch from Miles Wilton.
1975 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1976 with the definition in sysexits.h (which is #included earlier).
1977 Fortunately, Exim does not actually use EX_OK. The code used to try to
1978 preserve the sysexits.h value, by assumimg that macro definitions were
1979 scanned for macro replacements. I have been disabused of this notion,
1980 so now the code just undefines EX_OK before #including unistd.h.
1982 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1983 in the smtp transport. When a block could not be written in a single
1984 write() function, the timeout was being re-applied to each part-write.
1985 This seems wrong - if the receiver was accepting one byte at a time it
1986 would take for ever. The timeout is now adjusted when this happens. It
1987 doesn't have to be particularly precise.
1989 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1990 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1992 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1993 without a domain if the check to <postmaster@domain> fails.
1995 SC/01 Eximstats: added -xls and the ability to specify output files
1996 (patch written by Frank Heydlauf).
1998 SC/02 Eximstats: use FileHandles for outputing results.
2000 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2002 SC/04 Eximstats: fixed display of large numbers with -nvr option
2004 SC/05 Eximstats: fixed merging of reports with empty tables.
2006 SC/06 Eximstats: added the -include_original_destination flag
2008 SC/07 Eximstats: removed tabs and trailing whitespace.
2010 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2012 TK/06 MBOX spool code: Add real "From " MBOX separator line
2013 so the .eml file is really in mbox format (even though
2014 most programs do not really care). Patch from Alex Miller.
2016 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2017 The latter is generated from $received_to and is only set if the
2018 message has one envelope recipient. SA can use these headers,
2019 obviously out-of-the-box. Patch from Alex Miller.
2021 PH/08 The ${def test on a variable was returning false if the variable's
2022 value was "0", contrary to what the specification has always said!
2023 The result should be true unless the variable is empty.
2025 PH/09 The syntax error of a character other than { following "${if
2026 def:variable_name" (after optional whitespace) was not being diagnosed.
2027 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2028 accidental colon was present, for example, could give incorrect results.
2030 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2031 result is used (not including appendfile, where other changes are about
2034 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2035 This involved changing a lot of size variables from int to off_t. It
2036 should work with maildirs and everything.
2038 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2039 spamd dying while we are connected to it.
2041 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2044 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2045 function for BDB 4.3.
2047 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2049 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2050 the sources for PCRE have been re-arranged and more files are now
2053 PH/15 The code I had for printing potentially long long variables in PH/11
2054 above was not the best (it lost precision). The length of off_t variables
2055 is now inspected at build time, and an appropriate printing format (%ld
2056 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2057 to be "long long int" or "long int". This is needed for the internal
2058 formatting function string_vformat().
2060 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2061 the configuration file to be ":syslog", then the script "guesses" where
2062 the logs files are, rather than using the compiled in default. In our
2063 case the guess is not the same as the compiled default, so the script
2064 suddenly stopped working when I started to use syslog. The patch checks
2065 to see if log_file_path is "". If so, it attempts to read it from exim
2066 with no configuration file to get the compiled in version, before it
2067 falls back to the previous guessing code."
2069 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2070 implementing BATV in an Exim configuration. See NewStuff for the gory
2073 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2074 Makefile that are specific to HP-UX.
2076 PH/18 If the "use_postmaster" option was set for a recipient callout together
2077 with the "random" option, the postmaster address was used as the MAIL
2078 FROM address for the random test, but not for the subsequent recipient
2079 test. It is now used for both.
2081 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2082 patch removes a few documentation additions to RFC 3028, because the
2083 latest draft now contains them. It adds the new en;ascii-case comparator
2084 and a new error check for 8bit text in MIME parts. Comparator and
2085 require names are now matched exactly. I enabled the subaddress
2086 extension, but it is not well tested yet (read: it works for me)."
2088 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2089 rework some of the code of TK/09 above to avoid the hardwired use of
2090 "%lld" and "long long". Replaced the call to snprintf() with a call to
2093 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2094 records point to non-existent hosts", "retry timeout exceeded", and
2095 "retry time not reached for any host after a long failure period".
2097 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2098 experimental DomainKeys support:
2100 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2101 (2) On an error such as an illegally used "control", the wrong name for
2102 the control was given.
2104 These problems did NOT occur unless DomainKeys support was compiled.
2106 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2108 PH/24 Added ${if match_ip condition.
2110 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2111 databases so that it will be absolutely obvious if a crash occurs in the
2112 DB library. This is a regular occurrence (often caused by mis-matched
2115 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2116 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2117 picked up on a user's system that detects such things. There doesn't seem
2118 to be a gcc warning option for this - only an attribute that has to be
2119 put on the function's prototype. It seems that in Fedora Core 4 they have
2120 set this on a number of new functions. No doubt there will be more in due
2123 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2124 specify a transport. However, if an address that was verified by such a
2125 router was the subject of a callout, Exim crashed because it tried to
2126 read the rcpt_include_affixes from the non-existent transport. Now it
2127 just assumes that the setting of that option is false. This bug was
2128 introduced by 4.51/PH/31.
2130 PH/28 Changed -d+all to exclude +memory, because that information is very
2131 rarely of interest, but it makes the output a lot bigger. People tend to
2132 do -d+all out of habit.
2134 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2135 code in os-type was giving problems when libc.so lives in lib64, like on
2138 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2139 aren't the modern standard, and it seems that some systems' include files
2140 don't always have them. Exim was already checking for some of the newer
2141 ones like T_AAAA, and defining it itself. I've added checks for all the
2142 record types that Exim uses.
2144 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2145 not automatically generating a new one, as it is supposed to. This
2146 prevented TLS from working. If the file did exist, but contained invalid
2147 data, a new version was generated, as expected. It was only the case of a
2148 non-existent file that was broken.
2150 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2151 with a change in libdomainkeys > 0.64.
2153 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2154 from DNS. If the selector record carries the flag, it now has
2155 precedence over the domain-wide flag.
2157 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2159 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2160 the use of a port name that isn't defined in /etc/services) occurred, the
2161 message was deferred as in a normal delivery, and thus remained on the
2162 spool, instead of being failed because of the mua_wrapper setting. This
2163 is now fixed, and I tidied up some of the mua_wrapper messages at the
2166 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2167 the messages in a hash of arrays rather than using individual hashes.
2168 This is a bit cleaner and results in dramatic memory savings, albeit
2169 at a slight CPU cost.
2171 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2172 as requested by Marc Sherman.
2174 SC/10 Eximstats: added histograms for user specified patterns as requested
2177 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2179 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2180 fopen() in the content-scanning modules that did not already have it.
2186 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2187 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2189 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2191 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2193 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2194 to test Sieve filters that use "vacation".
2196 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2197 that changes the way the GnuTLS parameters are stored in the cache file.
2198 The new format can be generated externally. For backward compatibility,
2199 if the data in the cache doesn't make sense, Exim assumes it has read an
2200 old-format file, and it generates new data and writes a new file. This
2201 means that you can't go back to an older release without removing the
2204 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2205 work if there are any delivery delays because "one_time" forces the
2206 parent to be marked "delivered", so its unseen clone is never tried
2207 again. For this reason, Exim now forbids the simultaneous setting of
2210 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2211 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2212 entry if you want to know the details. The fix, however, neglected to
2213 consider the case when local delivery batching is involved. The test for
2214 "previously delivered" was not happening when checking to see if an
2215 address could be batched with a previous (undelivered) one; under
2216 certain circumstances this could lead to multiple deliveries to the same
2219 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2220 in its include files, and this causes problems building Exim.
2222 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2223 header_syntax) but Exim was just ignoring anything given after a slash.
2224 In particular, this caused confusion with an attempt to use "verify =
2225 reverse_host_lookup/defer_ok". An error is now given when options are
2226 supplied for verify items that do not have them. (Maybe reverse_host_
2227 lookup should have a defer_ok option, but that's a different point.)
2229 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2230 defined by RFC 821) to 2048, because there were problems with some AUTH
2231 commands, and RFC 1869 says the size should be increased for extended
2232 SMTP commands that take arguments.
2234 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2237 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2238 "unknown" error; now it says that the functionality isn't in the binary.
2240 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2241 an address' error message when a string expansion fails (syntax or
2242 whatever). Otherwise the password may appear in the log. Following change
2243 PH/42 below, there is no longer a chance of it appearing in a bounce
2246 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2248 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2249 of its addresses was ever tried. (Bugzilla bug #2.)
2251 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2252 the result incorrectly in the debug output. (It correctly added a newline
2253 to what was transported.)
2255 TF/01 Added $received_time.
2257 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2258 commented out examples of how to interface to a virus scanner and to
2259 SpamAssassin. Also added commented examples of av_scanner and
2260 spamd_address settings.
2262 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2263 and controls are allowed in which ACLs. There were a couple of minor
2264 errors. Some of the entries in the conditions table (which is a table of
2265 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2266 negation of where the condition IS allowed.
2268 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2270 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2271 header file does not have a version number, so I've had to invent a new
2272 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2273 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2274 radiusclient), but it was contributed by a Radius user.
2276 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2277 files or directories, for OpenSSL.
2279 PH/19 When an Exim process that is running as root has to create an Exim log
2280 file, it does so in a subprocess that runs as exim:exim so as to get the
2281 ownership right at creation (otherwise, other Exim processes might see
2282 the file with the wrong ownership). There was no test for failure of this
2283 fork() call, which would lead to the process getting stuck as it waited
2284 for a non-existent subprocess. Forks do occasionally fail when resources
2285 run out. I reviewed all the other calls to fork(); they all seem to check
2288 PH/20 When checking for unexpected SMTP input at connect time (before writing
2289 the banner), Exim was not dealing correctly with a non-positive return
2290 from the read() function. If the client had disconnected by this time,
2291 the result was a log entry for a synchronization error with an empty
2292 string after "input=" when read() returned zero. If read() returned -1
2293 (an event I could not check), uninitialized data bytes were printed.
2294 There were reports of junk text (parts of files, etc) appearing after
2297 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2299 PH/22 Added support for macro redefinition, and (re)definition in between
2300 driver and ACL definitions.
2302 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2303 forgetting to use the resulting value; it was using the unexpanded value.
2305 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2306 hadn't been configured. The fix is from Juergen Kreileder, who
2307 understands it better than I do:
2309 "Here's what I see happening with three configured cyrus_sasl
2310 authenticators configured (plain, login, cram-md5):
2312 On startup auth_cyrus_sasl_init() gets called for each of these.
2313 This means three calls to sasl_listmech() without a specified mech_list.
2314 => SASL tests which mechs of all available mechs actually work
2315 => three warnings about OTP not working
2316 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2318 With the patch, sasl_listmech() also gets called three times. But now
2319 SASL's mech_list option is set to the server_mech specified in the the
2320 authenticator. Or in other words, the answer from sasl_listmech()
2321 gets limited to just the mech you're testing for (which is different
2323 => the return list contains just 'plain' or 'login', 'cram-md5' or
2324 nothing depending on the value of ob->server_mech.
2326 I've just tested the patch: Authentication still works fine,
2327 unavailable mechs specified in the exim configuration are still
2328 caught, and the auth.log warnings about OTP are gone."
2330 PH/25 When debugging is enabled, the contents of the command line are added
2331 to the debugging output, even when log_selector=+arguments is not
2334 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2335 answer is "GNU", and only if the return is "GNU/something" is the answer
2338 PH/27 $acl_verify_message is now set immediately after the failure of a
2339 verification in an ACL, and so is available in subsequent modifiers. In
2340 particular, the message can be preserved by coding like this:
2342 warn !verify = sender
2343 set acl_m0 = $acl_verify_message
2345 Previously, $acl_verify_message was set only while expanding "message"
2346 and "log_message" when a very denied access.
2348 PH/28 Modified OS/os.c-Linux with
2350 -#ifndef OS_LOAD_AVERAGE
2351 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2353 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2354 nomenclature these days.)
2356 PH/29 Installed patch from the Sieve maintainer that adds the options
2357 sieve_useraddress and sieve_subaddress to the redirect router.
2359 PH/30 In these circumstances:
2360 . Two addresses routed to the same list of hosts;
2361 . First host does not offer TLS;
2362 . First host accepts first address;
2363 . First host gives temporary error to second address;
2364 . Second host offers TLS and a TLS session is established;
2365 . Second host accepts second address.
2366 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2367 and peerdn, if requested) that were in fact used only for the second
2370 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2371 attention to any local part prefix or suffix that was matched by the
2372 router that accepted the address. It now behaves in the same way as it
2373 does for delivery: the affixes are removed from the local part unless
2374 rcpt_include_affixes is set on the transport.
2376 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2377 timeout during the DATA phase of an incoming message.
2379 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2380 applied a patch sanctioned by the Sieve maintainer.
2382 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2383 the uid or gid is negative. A case of a negative gid caused this to be
2384 noticed. The fix allows for either to be negative.
2386 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2387 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2390 PH/36 The change PH/12 above was broken. Fixed it.
2392 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2393 the grounds that routing the same address twice would always produce the
2394 same answer. This might have been true once, but it is certainly no
2395 longer true now. Routing a child address may depend on the previous
2396 routing that produced that child. Some complicated redirection strategies
2397 went wrong when messages had multiple recipients, and made Exim's
2398 behaviour dependent on the order in which the addresses were given.
2400 I have moved the duplicate checking until after the routing is complete.
2401 Exim scans the addresses that are assigned to local and remote
2402 transports, and removes any duplicates. This means that more work will be
2403 done, as duplicates will always all be routed, but duplicates are
2404 presumably rare, so I don't expect this is of any significance.
2406 For deliveries to pipes, files, and autoreplies, the duplicate checking
2407 still happens during the routing process, since they are not going to be
2410 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2411 It corrects a timeout issue with spamd. This is Ian's comment: "The
2412 background is that sometimes spamd either never reads data from a
2413 connection it has accepted, or it never writes response data. The exiscan
2414 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2415 blindly assumes that writes won't block so it may never time out."
2417 PH/39 Allow G after quota size as well as K and M.
2419 PH/40 The value set for $authenticated_id in an authenticator may not contain
2420 binary zeroes or newlines because the value is written to log lines and
2421 to spool files. There was no check on this. Now the value is run through
2422 the string_printing() function so that such characters are converted to
2423 printable escape sequences.
2425 PH/41 $message_linecount is a new variable that contains the total number of
2426 lines in the message. Compare $body_linecount, which is the count for the
2429 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2430 bounce and delay warning messages, except in certain special cases, which
2433 (a) An SMTP error message from a remote host;
2434 (b) A message specified in a :fail: redirection;
2435 (c) A message specified in a "fail" command in a system filter;
2436 (d) A message specified in a FAIL return from the queryprogram router;
2437 (e) A message specified by the cannot_route_message router option.
2439 In these cases only, Exim does include the error details in bounce and
2440 warning messages. There are also a few cases where bland messages such
2441 as "unrouteable address" or "local delivery error" are given.
2443 PH/43 $value is now also set for the "else" part of a ${run expansion.
2445 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2446 being worked on, but at least Exim now implements the latest version to
2449 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2450 process to complete was treated as a delivery failure, a timeout while
2451 writing the message to the pipe was logged, but erroneously treated as a
2452 successful delivery. Such timeouts include transport filter timeouts. For
2453 consistency with the overall process timeout, these timeouts are now
2454 treated as errors, giving rise to delivery failures by default. However,
2455 there is now a new Boolean option for the pipe transport called
2456 timeout_defer, which, if set TRUE, converts the failures into defers for
2457 both kinds of timeout. A transport filter timeout is now identified in
2460 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2461 systems where "make" and "gmake" are different, calling "gmake" at top
2462 level broke things. I've arranged for the value of $(MAKE) to be passed
2463 from the Makefile to this script so that it can call the same version of
2467 A note about Exim versions 4.44 and 4.50
2468 ----------------------------------------
2470 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2471 changes of various kinds. As a consequence, a big documentation update was
2472 needed. This delayed the release for rather longer than seemed good, especially
2473 in the light of a couple of (minor) security issues. Therefore, the changes
2474 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2475 release. So 4.44 and 4.50 are in effect two different branches that both start
2478 I have left the 4.50 change log unchanged; it contains all the changes since
2479 4.43. The change log for 4.44 is below; many of its items are identical to
2480 those for 4.50. This seems to be the most sensible way to preserve the
2481 historical information.
2487 1. Minor wording change to the doc/README.SIEVE file.
2489 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2490 computation of the current number of files was incorrect.
2492 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2493 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2496 4. Give more explanation in the error message when the command for a transport
2497 filter fails to execute.
2499 5. There are several places where Exim runs a non-Exim command in a
2500 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2501 was being done only for the command run by the queryprogram router. It is
2502 now done for all such subprocesses. The other cases are: ${run, transport
2503 filters, and the commands run by the lmtp and pipe transports.
2505 6. Added CONFIGURE_GROUP build-time option.
2507 7. Some older OS have a limit of 256 on the maximum number of file
2508 descriptors. Exim was using setrlimit() to set 1000 as a large value
2509 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2510 systems. I've change it so that if it can't get 1000, it tries for 256.
2512 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2513 was an oversight, and furthermore, ever since the addition of extra
2514 controls (e.g. 4.43/32), the checks on when to allow different forms of
2515 "control" were broken. There should now be diagnostics for all cases when a
2516 control that does not make sense is encountered.
2518 9. Added the /retain_sender option to "control=submission".
2520 10. $recipients is now available in the predata ACL (oversight).
2522 11. Tidy the search cache before the fork to do a delivery from a message
2523 received from the command line. Otherwise the child will trigger a lookup
2524 failure and thereby defer the delivery if it tries to use (for example) a
2525 cached ldap connection that the parent has called unbind on.
2527 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2528 of $address_data from the recipient verification was clobbered by the
2529 sender verification.
2531 13. The value of address_data from a sender verification is now available in
2532 $sender_address_data in subsequent conditions in the ACL statement.
2534 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2536 15. Added a new option "connect=<time>" to callout options, to set a different
2539 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2540 was its contents. (It was OK if the option was not defined at all.)
2542 17. A "Completed" log line is now written for messages that are removed from
2543 the spool by the -Mrm option.
2545 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2546 information about exactly what failed.
2548 19. Added -dd to debug only the daemon process.
2550 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2551 handles timeouts, both on the server side and network timeouts. Renamed the
2552 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2554 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2555 It is now set to "smtps".
2557 22. $host_address is now set to the target address during the checking of
2558 ignore_target_hosts.
2560 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2561 being passed; this would have caused $sender_host_name to have been used if
2562 matching the list had actually called for a host name (not very likely,
2563 since this list is usually IP addresses). A host name is now passed as
2566 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2567 code that specifies a non-restarting handler (typically sigaction() in
2568 modern systems) in an attempt to fix a rare and obscure crash bug.
2570 25. Narrowed the window for a race in the daemon that could cause it to ignore
2571 SIGCHLD signals. This is not a major problem, because they are used only to
2572 wake it up if nothing else does.
2574 26. A malformed maildirsize file could cause Exim to calculate negative values
2575 for the mailbox size or file count. Odd effects could occur as a result.
2576 The maildirsize information is now recalculated if the size or filecount
2579 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2580 support for a long time. Removed HAVE_SYS_VFS_H.
2582 28. Installed the latest version of exipick from John Jetmore.
2584 29. In an address list, if the pattern was not a regular expression, an empty
2585 subject address (from a bounce message) matched only if the pattern was an
2586 empty string. Non-empty patterns were not even tested. This was the wrong
2587 because it is perfectly reasonable to use an empty address as part of a
2588 database query. An empty address is now tested by patterns that are
2589 lookups. However, all the other forms of pattern expect the subject to
2590 contain a local part and a domain, and therefore, for them, an empty
2591 address still always fails if the pattern is not itself empty.
2593 30. Exim went into a mad DNS loop when attempting to do a callout where the
2594 host was specified on an smtp transport, and looking it up yielded more
2595 than one IP address.
2597 31. Re-factored the code for checking spool and log partition space into a
2598 function that finds that data and another that does the check. The former
2599 is then used to implement four new variables: $spool_space, $log_space,
2600 $spool_inodes, and $log_inodes.
2602 32. The RFC2047 encoding function was originally intended for short strings
2603 such as real names; it was not keeping to the 75-character limit for
2604 encoded words that the RFC imposes. It now respects the limit, and
2605 generates multiple encoded words if necessary. To be on the safe side, I
2606 have increased the buffer size for the ${rfc2047: expansion operator from
2609 33. It is now permitted to omit both strings after an "if" condition; if the
2610 condition is true, the result is "true". As before, when the second string
2611 is omitted, a false condition yields an empty string. This makes it less
2612 cumbersome to write custom ACL and router conditions.
2614 34. Failure to deliver a bounce message always caused it to be frozen, even if
2615 there was an errors_to setting on the router. The errors_to setting is now
2618 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2619 canonical form (fully expanded) before being placed in
2620 $sender_host_address.
2622 36. The table in the code that translates DNS record types into text (T_A to
2623 "A" for instance) was missing entries for NS and CNAME. It is just possible
2624 that this could have caused confusion if both these types were looked up
2625 for the same domain, because the text type is used as part of Exim's
2626 per-process caching. But the chance of anyone hitting this buglet seems
2629 37. The dnsdb lookup has been extended in a number of ways.
2631 (1) There is a new type, "zns", which walks up the domain tree until it
2632 finds some nameserver records. It should be used with care.
2634 (2) There is a new type, "mxh", which is like "mx" except that it returns
2635 just the host names, not the priorities.
2637 (3) It is now possible to give a list of domains (or IP addresses) to be
2638 looked up. The behaviour when one of the lookups defers can be
2639 controlled by a keyword.
2641 (4) It is now possible to specify the separator character for use when
2642 multiple records are returned.
2644 38. The dnslists ACL condition has been extended: it is now possible to supply
2645 a list of IP addresses and/or domains to be looked up in a particular DNS
2648 39. Added log_selector=+queue_time_overall.
2650 40. When running the queue in the test harness, wait just a tad after forking a
2651 delivery process, to get repeatability of debugging output.
2653 41. Include certificate and key file names in error message when GnuTLS fails
2654 to set them up, because the GnuTLS error message doesn't include the name
2655 of the failing file when there is a problem reading it.
2657 42. Allow both -bf and -bF in the same test run.
2659 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2661 44. The "Exiscan patch" is now merged into the mainline Exim source.
2663 45. Sometimes the final signoff response after QUIT could fail to get
2664 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2665 < 0 before doing a fflush(). This bug looks as though it goes back to the
2666 introduction of TLS in release 3.20, but "sometimes" must have been rare
2667 because the tests only now provoked it.
2669 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2670 (this can affect the format of dates).
2672 47. exim_tidydb, when checking for the continued existence of a message for
2673 which it has found a message-specific retry record, was not finding
2674 messages that were in split spool directories. Consequently, it was
2675 deleting retry records that should have stayed in existence.
2677 48. Steve fixed some bugs in eximstats.
2679 49. The SPA authentication driver was not abandoning authentication and moving
2680 on to the next authenticator when an expansion was forced to fail,
2681 contradicting the general specification for all authenticators. Instead it
2682 was generating a temporary error. It now behaves as specified.
2684 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2685 (the order specifies the preference for clients). The order is now AES256,
2686 AES128, 3DES, ARCFOUR128.
2688 51. Small patch to Sieve code - explicitly set From: when generating an
2691 52. Exim crashed if a remote delivery caused a very long error message to be
2692 recorded - for instance if somebody sent an entire SpamAssassin report back
2693 as a large number of 550 error lines. This bug was coincidentally fixed by
2694 increasing the size of one of Exim's internal buffers (big_buffer) that
2695 happened as part of the Exiscan merge. However, to be on the safe side, I
2696 have made the code more robust (and fixed the comments that describe what
2699 53. Now that there can be additional text after "Completed" in log lines (if
2700 the queue_time_overall log selector is set), a one-byte patch to exigrep
2701 was needed to allow it to recognize "Completed" as not the last thing in
2704 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2705 patch that reportedly fixes this has been added. I am not expert enough to
2706 create a test for it. This is what the patch creator wrote:
2708 "I found a little strange behaviour of ldap code when working with
2709 Windows 2003 AD Domain, where users was placed in more than one
2710 Organization Units. When I tried to give exim partial DN, the exit code
2711 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2712 But simultaneously result of request was absolutely normal ldap result,
2713 so I produce this patch..."
2715 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2716 REFERENCE, so I have modified the code to exclude the patch when that macro
2719 55. Some experimental protocols are using DNS PTR records for new purposes. The
2720 keys for these records are domain names, not reversed IP addresses. The
2721 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2722 leaves it alone. Component reversal etc. now happens only for IP addresses.
2725 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2727 57. Double the size of the debug message buffer (to 2048) so that more of very
2728 long debug lines gets shown.
2730 58. The exicyclog utility now does better if the number of log files to keep
2731 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2733 59. Two changes related to the smtp_active_hostname option:
2735 (1) $smtp_active_hostname is now available as a variable.
2736 (2) The default for smtp_banner uses $smtp_active_hostname instead
2737 of $primary_hostname.
2739 60. The host_aton() function is supposed to be passed a string that is known
2740 to be a valid IP address. However, in the case of IPv6 addresses, it was
2741 not checking this. This is a hostage to fortune. Exim now panics and dies
2742 if the condition is not met. A case was found where this could be provoked
2743 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2744 components; fortuitously, this particular loophole had already been fixed
2745 by change 4.50/55 above.
2747 If there are any other similar loopholes, the new check in host_aton()
2748 itself should stop them being exploited. The report I received stated that
2749 data on the command line could provoke the exploit when Exim was running as
2750 exim, but did not say which command line option was involved. All I could
2751 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2752 running as the user.
2755 61. There was a buffer overflow vulnerability in the SPA authentication code
2756 (which came originally from the Samba project). I have added a test to the
2757 spa_base64_to_bits() function which I hope fixes it.
2760 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2761 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2763 63. The daemon start-up calls getloadavg() while still root for those OS that
2764 need the first call to be done as root, but it missed one case: when
2765 deliver_queue_load_max is set with deliver_drop_privilege. This is
2766 necessary for the benefit of the queue runner, because there is no re-exec
2767 when deliver_drop_privilege is set.
2769 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2770 This has been fixed.
2772 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2773 was in use, was not putting the data itself into the right store pool;
2774 consequently, it could be overwritten for a subsequent message in the same
2775 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2778 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2780 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2781 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2782 the function were treating the return as a boolean value, which happened to
2783 work because 0=false and not-0=true, but is not correct code.
2785 68. The host_aton() function was not handling scoped IPv6 addresses (those
2786 with, for example, "%eth0" on the end) correctly.
2788 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2789 negated items (that is, ~something) in unsigned ints. Some compilers
2790 apparently mutter when there is no cast.
2792 70. If an address verification called from an ACL failed, and did not produce a
2793 user-specific message (i.e. there was only a "system" message), nothing was
2794 put in $acl_verify_message. In this situation, it now puts the system
2797 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2798 session; change 4.31/43 added the unwanted input to the log line - except
2799 that it did not do this in the start of session case. It now does.
2801 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2802 This is wrong and can cause the other end to generate a synchronization
2803 error if it is another Exim or anything else that does the synchronization
2804 check. A QUIT command is no longer sent after a timeout.
2806 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2807 during host lookups.
2809 74. The defer_ok option of callout verification was not working if it was used
2810 when verifying addresses in header lines, that is, for this case:
2812 verify = header_sender/callout=defer_ok
2814 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2815 those file descriptors could be used for SMTP connections. If anything
2816 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2817 could be sent to the SMTP client, causing chaos. The daemon now opens
2818 stdin, stdout, and stderr to /dev/null when it puts itself into the
2821 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2822 log by default. The user can override this with suitable Perl magic.
2824 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2825 the log message when discard triggers, was not working for the DATA ACL or
2826 for the non-SMTP ACL.
2828 78. Error message wording change in sieve.c.
2830 79. If smtp_accept_max_per_host was set, the number of connections could be
2831 restricted to fewer than expected, because the daemon was trying to set up
2832 a new connection before checking whether the processes handling previous
2833 connections had finished. The check for completed processes is now done
2834 earlier. On busy systems, this bug wouldn't be noticed because something
2835 else would have woken the daemon, and it would have reaped the completed
2838 80. If a message was submitted locally by a user whose login name contained one
2839 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2840 It caused a spool format error. I have fixed the spool reading code. A
2841 related problem was that the "from" clause in the Received: line became
2842 illegal because of the space(s). It is now covered by ${quote_local_part.
2844 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2847 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2849 83. Patch from Sieve maintainer to fix unterminated string problem in
2850 "vacation" handling.
2852 84. Some minor changes to the Linux configuration files to help with other
2853 OS variants using glibc.
2855 85. One more patch for Sieve to update vacation handling to latest spec.
2858 ----------------------------------------------------
2859 See the note above about the 4.44 and 4.50 releases.
2860 ----------------------------------------------------
2866 1. Change 4.43/35 introduced a bug that caused file counts to be
2867 incorrectly computed when quota_filecount was set in an appendfile
2870 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2871 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2874 3. Give more explanation in the error message when the command for a transport
2875 filter fails to execute.
2877 4. There are several places where Exim runs a non-Exim command in a
2878 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2879 was being done only for the command run by the queryprogram router. It is
2880 now done for all such subprocesses. The other cases are: ${run, transport
2881 filters, and the commands run by the lmtp and pipe transports.
2883 5. Some older OS have a limit of 256 on the maximum number of file
2884 descriptors. Exim was using setrlimit() to set 1000 as a large value
2885 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2886 systems. I've change it so that if it can't get 1000, it tries for 256.
2888 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2889 was an oversight, and furthermore, ever since the addition of extra
2890 controls (e.g. 4.43/32), the checks on when to allow different forms of
2891 "control" were broken. There should now be diagnostics for all cases when a
2892 control that does not make sense is encountered.
2894 7. $recipients is now available in the predata ACL (oversight).
2896 8. Tidy the search cache before the fork to do a delivery from a message
2897 received from the command line. Otherwise the child will trigger a lookup
2898 failure and thereby defer the delivery if it tries to use (for example) a
2899 cached ldap connection that the parent has called unbind on.
2901 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2902 of $address_data from the recipient verification was clobbered by the
2903 sender verification.
2905 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2906 was its contents. (It was OK if the option was not defined at all.)
2908 11. A "Completed" log line is now written for messages that are removed from
2909 the spool by the -Mrm option.
2911 12. $host_address is now set to the target address during the checking of
2912 ignore_target_hosts.
2914 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2915 being passed; this would have caused $sender_host_name to have been used if
2916 matching the list had actually called for a host name (not very likely,
2917 since this list is usually IP addresses). A host name is now passed as
2920 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2921 code that specifies a non-restarting handler (typically sigaction() in
2922 modern systems) in an attempt to fix a rare and obscure crash bug.
2924 15. Narrowed the window for a race in the daemon that could cause it to ignore
2925 SIGCHLD signals. This is not a major problem, because they are used only to
2926 wake it up if nothing else does.
2928 16. A malformed maildirsize file could cause Exim to calculate negative values
2929 for the mailbox size or file count. Odd effects could occur as a result.
2930 The maildirsize information is now recalculated if the size or filecount
2933 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2934 support for a long time. Removed HAVE_SYS_VFS_H.
2936 18. Updated exipick to current release from John Jetmore.
2938 19. Allow an empty sender to be matched against a lookup in an address list.
2939 Previously the only cases considered were a regular expression, or an
2942 20. Exim went into a mad DNS lookup loop when doing a callout where the
2943 host was specified on the transport, if the DNS lookup yielded more than
2946 21. The RFC2047 encoding function was originally intended for short strings
2947 such as real names; it was not keeping to the 75-character limit for
2948 encoded words that the RFC imposes. It now respects the limit, and
2949 generates multiple encoded words if necessary. To be on the safe side, I
2950 have increased the buffer size for the ${rfc2047: expansion operator from
2953 22. Failure to deliver a bounce message always caused it to be frozen, even if
2954 there was an errors_to setting on the router. The errors_to setting is now
2957 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2958 canonical form (fully expanded) before being placed in
2959 $sender_host_address.
2961 24. Updated eximstats to version 1.33
2963 25. Include certificate and key file names in error message when GnuTLS fails
2964 to set them up, because the GnuTLS error message doesn't include the name
2965 of the failing file when there is a problem reading it.
2967 26. Expand error message when OpenSSL has problems setting up cert/key files.
2970 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2971 (this can affect the format of dates).
2973 28. exim_tidydb, when checking for the continued existence of a message for
2974 which it has found a message-specific retry record, was not finding
2975 messages that were in split spool directories. Consequently, it was
2976 deleting retry records that should have stayed in existence.
2978 29. eximstats updated to version 1.35
2979 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2980 1.35 - bugfix such that pie charts by volume are generated correctly
2982 30. The SPA authentication driver was not abandoning authentication and moving
2983 on to the next authenticator when an expansion was forced to fail,
2984 contradicting the general specification for all authenticators. Instead it
2985 was generating a temporary error. It now behaves as specified.
2987 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2988 (the order specifies the preference for clients). The order is now AES256,
2989 AES128, 3DES, ARCFOUR128.
2991 31. Small patch to Sieve code - explicitly set From: when generating an
2994 32. Exim crashed if a remote delivery caused a very long error message to be
2995 recorded - for instance if somebody sent an entire SpamAssassin report back
2996 as a large number of 550 error lines. This bug was coincidentally fixed by
2997 increasing the size of one of Exim's internal buffers (big_buffer) that
2998 happened as part of the Exiscan merge. However, to be on the safe side, I
2999 have made the code more robust (and fixed the comments that describe what
3002 33. Some experimental protocols are using DNS PTR records for new purposes. The
3003 keys for these records are domain names, not reversed IP addresses. The
3004 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3005 leaves it alone. Component reversal etc. now happens only for IP addresses.
3008 34. The host_aton() function is supposed to be passed a string that is known
3009 to be a valid IP address. However, in the case of IPv6 addresses, it was
3010 not checking this. This is a hostage to fortune. Exim now panics and dies
3011 if the condition is not met. A case was found where this could be provoked
3012 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3013 components; fortuitously, this particular loophole had already been fixed
3014 by change 4.50/55 or 4.44/33 above.
3016 If there are any other similar loopholes, the new check in host_aton()
3017 itself should stop them being exploited. The report I received stated that
3018 data on the command line could provoke the exploit when Exim was running as
3019 exim, but did not say which command line option was involved. All I could
3020 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3021 running as the user.
3024 35. There was a buffer overflow vulnerability in the SPA authentication code
3025 (which came originally from the Samba project). I have added a test to the
3026 spa_base64_to_bits() function which I hope fixes it.
3029 36. The daemon start-up calls getloadavg() while still root for those OS that
3030 need the first call to be done as root, but it missed one case: when
3031 deliver_queue_load_max is set with deliver_drop_privilege. This is
3032 necessary for the benefit of the queue runner, because there is no re-exec
3033 when deliver_drop_privilege is set.
3035 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3036 was in use, was not putting the data itself into the right store pool;
3037 consequently, it could be overwritten for a subsequent message in the same
3038 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3041 38. Sometimes the final signoff response after QUIT could fail to get
3042 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3043 < 0 before doing a fflush(). This bug looks as though it goes back to the
3044 introduction of TLS in release 3.20, but "sometimes" must have been rare
3045 because the tests only now provoked it.
3051 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3052 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3053 Now it returns an integer. A number of calls were still expecting a T/F
3054 return. Fortuitously, in all cases, the tests worked in OK situations,
3055 which is the norm. However, things would have gone wrong on any write
3056 failures on the smtp file descriptor. This function is used when sending
3057 messages over SMTP and also when doing verify callouts.
3059 2. When Exim is called to do synchronous delivery of a locally submitted
3060 message (the -odf or -odi options), it no longer closes stderr before doing
3063 3. Implemented the mua_wrapper option.
3065 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3067 5. Implemented the functions header_remove(), header_testname(),
3068 header_add_at_position(), and receive_remove_recipient(), and exported them
3071 6. If an ACL "warn" statement specified the addition of headers, Exim already
3072 inserted X-ACL-Warn: at the start if there was no header name. However, it
3073 was not making this test for the second and subsequent header lines if
3074 there were newlines in the string. This meant that an invalid header could
3075 be inserted if Exim was badly configured.
3077 7. Allow an ACL "warn" statement to add header lines at the start or after all
3078 the Received: headers, as well as at the end.
3080 8. Added the rcpt_4xx retry error code.
3082 9. Added postmaster_mailfrom=xxx to callout verification option.
3084 10. Added mailfrom=xxxx to the callout verification option, for verify=
3087 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3088 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3090 12. Inserted some casts to stop certain compilers warning when using pointer
3091 differences as field lengths or precisions in printf-type calls (mostly
3092 affecting debugging statements).
3094 13. Added optional readline() support for -be (dynamically loaded).
3096 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3097 same clock tick as a message's arrival, so that its received time was the
3098 same as the "first fail" time on the retry record, and that message
3099 remained on the queue past the ultimate address timeout, every queue runner
3100 would try a delivery (because it was past the ultimate address timeout) but
3101 after another failure, the ultimate address timeout, which should have then
3102 bounced the address, did not kick in. This was a "< instead of <=" error;
3103 in most cases the first failure would have been in the next clock tick
3104 after the received time, and all would be well.
3106 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3107 being recognized when the domain list was tested by the match_domain
3108 condition in an expansion string.
3110 16. Added the ${str2b64: operator.
3112 17. Exim was always calling setrlimit() to set a large limit for the number of
3113 processes, without checking whether the existing limit was already
3114 adequate. (It did check for the limit on file descriptors.) Furthermore,
3115 errors from getrlimit() and setrlimit() were being ignored. Now they are
3116 logged to the main and panic logs, but Exim does carry on, to try to do its
3117 job under whatever limits there are.
3119 18. Imported PCRE 5.0.
3121 19. Trivial typo in log message " temporarily refused connection" (the leading
3124 20. If the log selector return_path_on_delivery was set and an address was
3125 redirected to /dev/null, the delivery process crashed because it assumed
3126 that a return path would always be set for a "successful" delivery. In this
3127 case, the whole delivery is bypassed as an optimization, and therefore no
3130 21. Internal re-arrangement: the function for sending a challenge and reading
3131 a response while authentication was assuming a zero-terminated challenge
3132 string. It's now changed to take a pointer and a length, to allow for
3133 binary data in such strings.
3135 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3137 23. Exim was not respecting finduser_retries when seeking the login of the
3138 uid under which it was called; it was always trying 10 times. (The default
3139 setting of finduser_retries is zero.) Also, it was sleeping after the final
3140 failure, which is pointless.
3142 24. Implemented tls_on_connect_ports.
3144 25. Implemented acl_smtp_predata.
3146 26. If the domain in control=submission is set empty, Exim assumes that the
3147 authenticated id is a complete email address when it generates From: or
3148 Sender: header lines.
3150 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3151 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3152 chown and chgrp in /bin and hostname in /usr/bin.
3154 28. Exim was keeping the "process log" file open after each use, just as it
3155 does for the main log. This opens the possibility of it remaining open for
3156 long periods when the USR1 signal hits a daemon. Occasional processlog
3157 errors were reported, that could have been caused by this. Anyway, it seems
3158 much more sensible not to leave this file open at all, so that is what now
3161 29. The long-running daemon process does not normally write to the log once it
3162 has entered its main loop, and it closes the log before doing so. This is
3163 so that log files can straightforwardly be renamed and moved. However,
3164 there are a couple of unusual error situations where the daemon does write
3165 log entries, and I had neglected to close the log afterwards.
3167 30. The text of an SMTP error response that was received during a remote
3168 delivery was being truncated at 512 bytes. This is too short for some of
3169 the long messages that one sometimes sees. I've increased the limit to
3172 31. It is now possible to make retry rules that apply only when a message has a
3173 specific sender, in particular, an empty sender.
3175 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3176 it possible to be selective about when SMTP synchronization is enforced.
3178 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3180 32. Implemented hosts_connection_nolog.
3182 33. Added an ACL for QUIT.
3184 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3187 35. Added mailbox_size and mailbox_filecount to appendfile.
3189 36. Added control = no_multiline_responses to ACLs.
3191 37. There was a bug in the logic of the code that waits for the clock to tick
3192 in the case where the clock went backwards by a substantial amount such
3193 that the microsecond fraction of "now" was more than the microsecond
3194 fraction of "then" (but the whole seconds number was less).
3196 38. Added support for the libradius Radius client library this is found on
3197 FreeBSD (previously only the radiusclient library was supported).
3203 1. When certain lookups returned multiple values in the form name=value, the
3204 quoting of the values was not always being done properly. Specifically:
3205 (a) If the value started with a double quote, but contained no whitespace,
3207 (b) If the value contained whitespace other than a space character (i.e.
3208 tabs or newlines or carriage returns) it was not quoted.
3209 This fix has been applied to the mysql and pgsql lookups by writing a
3210 separate quoting function and calling it from the lookup code. The fix
3211 should probably also be applied to nisplus, ibase and oracle lookups, but
3212 since I cannot test any of those, I have not disturbed their existing code.
3214 2. A hit in the callout cache for a specific address caused a log line with no
3215 reason for rejecting RCPT. Now it says "Previous (cached) callout
3216 verification failure".
3218 3. There was an off-by-one bug in the queryprogram router. An over-long
3219 return line was truncated at 256 instead of 255 characters, thereby
3220 overflowing its buffer with the terminating zero. As well as fixing this, I
3221 have increased the buffer size to 1024 (and made a note to document this).
3223 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3224 when Exim is waiting for an SMTP response from a remote server, Exim
3225 restarts its select() call on the socket, thereby resetting its timeout.
3226 This is not a problem when such interrupts are rare. Somebody set up a cron
3227 job to run exiwhat every 2 minutes, which is less than the normal select()
3228 timeout (5 or 10 minutes). This meant that the select() timeout never
3229 kicked in because it was always reset. I have fixed this by comparing the
3230 time when an interrupt arrives with the time at the start of the first call
3231 to select(). If more time than the timeout has elapsed, the interrupt is
3232 treated as a timeout.
3234 5. Some internal re-factoring in preparation for the addition of Sieve
3235 extensions (by MH). In particular, the "personal" test is moved to a
3236 separate function, and given an option for scanning Cc: and Bcc: (which is
3237 not set for Exim filters).
3239 6. When Exim created an email address using the login of the caller as the
3240 local part (e.g. when creating a From: or Sender: header line), it was not
3241 quoting the local part when it contained special characters such as @.
3243 7. Installed new OpenBSD configuration files.
3245 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3246 try to make them clearer.
3248 9. Callout options, other than the timeout value, were being ignored when
3249 verifying sender addresses in header lines. For example, when using
3251 verify = header_sender/callout=no_cache
3253 the cache was (incorrectly) being used.
3255 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3256 only the Cygwin environment.
3258 11. When return_path_on_delivery was set as a log selector, if different remote
3259 addresses in the same message used different return paths and parallel
3260 remote delivery occurred, the wrong values would sometimes be logged.
3261 (Whenever a remote delivery process finished, the return path value from
3262 the most recently started remote delivery process was logged.)
3264 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3265 lines when AUTH and/or TLS are in use. This is the "received protocol"
3266 field. Exim used to use "asmtp" for authenticated SMTP, without any
3267 indication (in the protocol name) for TLS use. Now it follows the RFC and
3268 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3269 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3270 names appear in log lines as well as in Received: header lines.
3272 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3273 extensions, and comparison tests, and to fix some bugs.
3275 14. Changes to the "personal" filter test:
3277 (1) The test was buggy in that it was just doing the equivalent of
3278 "contains" tests on header lines. For example, if a user's address was
3279 anne@some.where, the "personal" test would incorrectly be true for
3281 To: susanne@some.where
3283 This test is now done by extracting each address from the header in turn,
3284 and checking the entire address. Other tests that are part of "personal"
3285 are now done using regular expressions (for example, to check local parts
3286 of addresses in From: header lines).
3288 (2) The list of non-personal local parts in From: addresses has been
3289 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3290 taken from the Sieve specification recommendations.
3292 (3) If the message contains any header line starting with "List-" it is
3293 treated as non-personal.
3295 (4) The test for "circular" in the Subject: header line has been removed
3296 because it now seems ill-conceived.
3298 15. Minor typos in src/EDITME comments corrected.
3300 16. Installed latest exipick from John Jetmore.
3302 17. If headers_add on a router specified a text string that was too long for
3303 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3304 of string_sprintf() is now avoided.
3306 18. $message_body_size was not set (it was always zero) when running the DATA
3307 ACL and the local_scan() function.
3309 19. For the "mail" command in an Exim filter, no default was being set for
3310 the once_repeat time, causing a random time value to be used if "once" was
3311 specified. (If the value happened to be <= 0, no repeat happened.) The
3312 default is now 0s, meaning "never repeat". The "vacation" command was OK
3313 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3314 (I found it when inspecting the code).
3316 20. There is now an overall timeout for performing a callout verification. It
3317 defaults to 4 times the callout timeout, which applies to individual SMTP
3318 commands during the callout. The overall timeout applies when there is more
3319 than one host that can be tried. The timeout is checked before trying the
3320 next host. This prevents very long delays if there are a large number of
3321 hosts and all are timing out (e.g. when the network connections are timing
3322 out). The value of the overall timeout can be changed by specifying an
3323 additional sub-option for "callout", called "maxwait". For example:
3325 verify = sender/callout=5s,maxwait=20s
3327 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3328 to the end before writing, but this should make it even safer).
3330 22. Exim was forgetting that it had advertised PIPELINING for the second and
3331 subsequent messages on an SMTP connection. It was also not resetting its
3332 memory on STARTTLS and an internal HELO.
3334 23. When Exim logs an SMTP synchronization error within a session, it now
3335 records whether PIPELINING has been advertised or not.
3337 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3338 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3339 rather than long int.
3341 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3343 26. Added the never_mail option to autoreply.
3349 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3350 crash if the getsockname() call failed; this can happen if a connection is
3351 closed very soon after it is established. The problem was simply in the
3352 order in which certain operations were done, causing Exim to try to write
3353 to the SMTP stream before it had set up the file descriptor. The bug has
3354 been fixed by making things happen in the correct order.
3360 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3361 before the connection was closed, thus losing the rejection response.
3363 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3364 some early Solaris releases, but causes trouble in current releases where
3365 socklen_t is defined.
3367 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3370 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3373 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3374 that releasing the top of it at the end releases what was used for sub-
3375 expansions (unless the block got too big). However, discard this block if
3376 the first thing is a variable or header, so that we can use its block when
3377 it is dynamic (useful for very large $message_headers, for example).
3379 6. Lookups now cache *every* query, not just the most recent. A new, separate
3380 store pool is used for this. It can be recovered when all lookup caches are
3381 flushed. Lookups now release memory at the end of their result strings.
3382 This has involved some general refactoring of the lookup sources.
3384 7. Some code has been added to the store_xxx() functions to reduce the amount
3385 of flapping under certain conditions.
3387 8. log_incoming_interface used to affect only the <= reception log lines. Now
3388 it causes the local interface and port to be added to several more SMTP log
3389 lines, for example "SMTP connection from", and rejection lines.
3391 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3393 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3395 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3396 could be overwritten at the end of the current message (or the start of a
3397 new message if it was set in a HELO ACL). The value is now preserved for
3398 the duration of the SMTP connection.
3400 12. If a transport had a headers_rewrite setting, and a matching header line
3401 contained an unqualified address, that address was qualified, even if it
3402 did not match any rewriting rules. The underlying bug was that the values
3403 of the flags that permit the existence of unqualified sender and recipient
3404 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3405 non-local messages, and by -bnq for local messages) were not being
3406 preserved with the message after it was received.
3408 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3409 "next input=" as part of the text comprising the host identity instead of
3410 the correct text. The code was using the same buffer for two different
3411 strings. However, depending on which order the printing function evaluated
3412 its arguments, the bug did not always show up. Under Linux, for example, my
3413 test suite worked just fine.
3415 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3416 doesn't work with some older versions of Perl. It has been changed to "my",
3417 which in any case is probably the better facility to use.
3419 15. A really picky compiler found some instances of statements for creating
3420 error messages that either had too many or two few arguments for the format
3423 16. The size of the buffer for calls to the DNS resolver has been increased
3424 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3425 for addresses that have a lot of PTR records. This alleviates a problem; it
3426 does not fully solve it.
3428 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3429 buffer now truncates the list and logs the incident, which is the same
3430 action as happens when Exim is looking up a host name and its aliases.
3431 Previously in this situation something unpredictable would happen;
3432 sometimes it was "internal error: store_reset failed".
3434 18. If a server dropped the connection unexpectedly when an Exim client was
3435 using GnuTLS and trying to read a response, the client delivery process
3436 crashed while trying to generate an error log message.
3438 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3439 string, for example:
3441 warn message = H1: something\nH2: something
3443 the text was added as a single header line from Exim's point of view
3444 though it ended up OK in the delivered message. However, searching for the
3445 second and subsequent header lines using $h_h2: did not work. This has been
3446 fixed. Similarly, if a system filter added multiple headers in this way,
3447 the routers could not see them.
3449 20. Expanded the error message when iplsearch is called with an invalid key to
3450 suggest using net-iplsearch in a host list.
3452 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3453 ACLs are no longer actually imposed (and a message to that effect is
3456 22. If a "gecos" field in a passwd entry contained escaped characters, in
3457 particular, if it contained a \" sequence, Exim got it wrong when building
3458 a From: or a Sender: header from that name. A second bug also caused
3459 incorrect handling when an unquoted " was present following a character
3460 that needed quoting.
3462 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3463 was not being matched caselessly.
3465 24. Arranged for all hyphens in the exim.8 source to be escaped with
3468 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3469 properly. Recipient callout cache records were still being keyed to include
3470 the sender, even when use_sender was set false. This led to far more
3471 callouts that were necessary. The sender is no longer included in the key
3472 when use_sender is false.
3474 26. Added "control = submission" modifier to ACLs.
3476 27. Added the ${base62d: operator to decode base 62 numbers.
3478 28. dnsdb lookups can now access SRV records.
3480 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3481 the configuration file.
3483 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3484 (-v) mode. This makes the output for a verbose queue run more intelligible.
3486 31. Added a use_postmaster feature to recipient callouts.
3488 32. Added the $body_zerocount variable, containing the number of binary zero
3489 bytes in the message body.
3491 33. The time of last modification of the "new" subdirectory is now used as the
3492 "mailbox time last read" when there is a quota error for a maildir
3495 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3497 35. Added +ignore_unknown as a special item in host lists.
3499 36. Code for decoding IPv6 addresses in host lists is now included, even if
3500 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3501 address was recognized as an IP address, but was then not correctly decoded
3502 into binary, causing unexpected and incorrect effects when compared with
3509 1. Very minor rewording of debugging text in manualroute to say "list of
3510 hosts" instead of "hostlist".
3512 2. If verify=header_syntax was set, and a header line with an unqualified
3513 address (no domain) and a large number of spaces between the end of the
3514 name and the colon was received, the reception process suffered a buffer
3515 overflow, and (when I tested it) crashed. This was caused by some obsolete
3516 code that should have been removed. The fix is to remove it!
3518 3. When running in the test harness, delay a bit after writing a bounce
3519 message to get a bit more predictability in the log output.
3521 4. Added a call to search_tidyup() just before forking a reception process. In
3522 theory, someone could use a lookup in the expansion of smtp_accept_max_
3523 per_host which, without the tidyup, could leave open a database connection.
3525 5. Added the variables $recipient_data and $sender_data which get set from a
3526 lookup success in an ACL "recipients" or "senders" condition, or a router
3527 "senders" option, similar to $domain_data and $local_part_data.
3529 6. Moved the writing of debug_print from before to after the "senders" test
3532 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3533 problems for message scanning, either using a data ACL, or using
3534 local_scan() because the Received: header was not generated till after they
3535 were called (in order to set the time as the time of reception completion).
3536 I have revised the way this works. The header is now generated after the
3537 body is received, but before the ACL or local_scan() are called. After they
3538 are run, the timestamp in the header is updated.
3544 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3545 before starting a queue runner without re-exec. This happened only when
3546 deliver_drop_privilege was set or when the Exim user was set to root. The
3547 effect of the bug was that timeouts during subsequent deliveries caused
3548 crashes instead of being properly handled. The handler is now left at its
3549 default (and expected) setting.
3551 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3552 message, again when deliver_drop_privilege is set or Exim is run as root.
3553 The bug described in (1) was not present in this case, but the tidying up
3554 of the other signals was missing. I have made the two cases consistent.
3556 3. The ignore_target_hosts setting on a manualroute router was being ignored
3557 for hosts that were looked up using the /MX notation.
3559 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3562 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3563 operated on the sender address. After changing the $sender_address to <>
3564 for the sender address verify, Exim was re-instated it as the original
3565 (before rewriting) address, but remembering that it had rewritten it, so it
3566 wasn't rewriting it again. This bug also had the effect of breaking the
3567 sender address verification caching when the sender address was rewritten.
3569 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3570 This has been changed so that if the ip literal address matches
3571 ignore_target_hosts, the router declines.
3573 7. Added expansion conditions match_domain, match_address, and match_local_
3574 part (NOT match_host).
3576 8. The placeholder for the Received: header didn't have a length field set.
3578 9. Added code to Exim itself and to exim_lock to test for a specific race
3579 condition that could lead to file corruption when using MBX delivery. The
3580 issue is with the lockfile that is created in /tmp. If this file is removed
3581 after a process has opened it but before that process has acquired a lock,
3582 there is the potential for a second process to recreate the file and also
3583 acquire a lock. This could lead to two Exim processes writing to the file
3584 at the same time. The added code performs the same test as UW imapd; it
3585 checks after acquiring the lock that its file descriptor still refers to
3586 the same named file.
3588 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3589 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3592 11. Added the smtp_active_hostname option. If used, this will typically be made
3593 to depend on the incoming interface address. Because $interface_address is
3594 not set up until the daemon has forked a reception process, error responses
3595 that can happen earlier (such as "too many connections") no longer contain
3598 12. If an expansion in a condition on a "warn" statement fails because a lookup
3599 defers, the "warn" statement is abandoned, and the next ACL statement is
3600 processed. Previously this caused the whole ACL to be aborted.
3602 13. Added the iplsearch lookup type.
3604 14. Added ident_timeout as a log selector.
3606 15. Added tls_certificate_verified as a log selector.
3608 16. Added a global option tls_require_ciphers (compare the smtp transport
3609 option of the same name). This controls incoming TLS connections.
3611 17. I finally figured out how to make tls_require_ciphers do a similar thing
3612 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3613 before starting the TLS session.
3615 18. Tabs are now shown as \t in -bP output.
3617 19. If the log selector return_path_on_delivery was set, Exim crashed when
3618 bouncing a message because it had too many Received: header lines.
3620 20. If two routers both had headers_remove settings, and the first one included
3621 a superfluous trailing colon, the final name in the first list and the
3622 first name in the second list were incorrectly joined into one item (with a
3623 colon in the middle).
3629 1. Added -C and -D options to the exinext utility, mainly to make it easier
3630 to include in the automated testing, but these could be helpful when
3631 multiple configurations are in use.
3633 2. The exinext utility was not formatting the output nicely when there was
3634 an alternate port involved in the retry record key, nor when there was a
3635 message id as well (for retries that were specific to a specific message
3636 and a specific host). It was also confused by IPv6 addresses, because of
3637 the additional colons they contain. I have fixed the IPv4 problem, and
3638 patched it up to do a reasonable job for IPv6.
3640 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3641 delivery, the log line now contains "pipelined" if PIPELINING was used.
3643 4. An SMTP transport process used to panic and die if the bind() call to set
3644 an explicit outgoing interface failed. This has been changed; it is now
3645 treated in the same way as a connect() failure.
3647 5. A reference to $sender_host_name in the part of a conditional expansion
3648 that was being skipped was still causing a DNS lookup. This no longer
3651 6. The def: expansion condition was not recognizing references to header lines
3652 that used bh_ and bheader_.
3654 7. Added the _cache feature to named lists.
3656 8. The code for checking quota_filecount in the appendfile transport was
3657 allowing one more file than it should have been.
3659 9. For compatibility with Sendmail, the command line option
3667 and sets the incoming protocol and host name (for trusted callers). The
3668 host name and its colon can be omitted when only the protocol is to be set.
3669 Note the Exim already has two private options, -pd and -ps, that refer to
3670 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3671 "s", but I don't think that's a major issue.
3673 10. A number of refactoring changes to the code, none of which should affect
3676 (a) The number of logging options was getting close to filling up the
3677 32-bit word that was used as a bit map. I have split them into two classes:
3678 those that are passed in the argument to log_write(), and those that are
3679 only ever tested independently outside of that function. These are now in
3680 separate 32-bit words, so there is plenty of room for expansion again.
3681 There is no change in the user interface or the logging behaviour.
3683 (b) When building, for example, log lines, the code previously used a
3684 macro that called string_cat() twice, in order to add two strings. This is
3685 not really sufficiently general. Furthermore, there was one instance where
3686 it was actually wrong because one of the argument was used twice, and in
3687 one call a function was used. (As it happened, calling the function twice
3688 did not affect the overall behaviour.) The macro has been replaced by a
3689 function that can join an arbitrary number of extra strings onto a growing
3692 (c) The code for expansion conditions now uses a table and a binary chop
3693 instead of a serial search (which was left over from when there were very
3694 few conditions). Also, it now recognizes conditions like "pam" even when
3695 the relevant support is not compiled in: a suitably worded error message is
3696 given if an attempt is made to use such a condition.
3698 11. Added ${time_interval:xxxxx}.
3700 12. A bug was causing one of the ddress fields not to be passed back correctly
3701 from remote delivery subprocesses. The field in question was not being
3702 subsequently used, so this caused to problems in practice.
3704 13. Added new log selectors queue_time and deliver_time.
3706 14. Might have fixed a bug in maildirsizefile handling that threw up
3707 "unexpected character" debug warnings, and recalculated the data
3708 unnecessarily. In any case, I expanded the warning message to give more
3711 15. Added the message "Restricted characters in address" to the statements in
3712 the default ACL that block characters like @ and % in local parts.
3714 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3715 Three changes have been made:
3717 (a) There was a serious bug; a negative response to MAIL caused the whole
3718 recipient domain to be cached as invalid, thereby blocking all messages
3719 to all local parts at the same domain, from all senders. This bug has
3720 been fixed. The domain is no longer cached after a negative response to
3721 MAIL if the sender used is not empty.
3723 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3726 (c) A new callout option, "use_sender" has been added for people who want
3727 the modified behaviour.
3733 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3736 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3737 indeed breaks things for older releases.
3739 3. Added additional logging to the case where there is a problem reading data
3740 from a filter that is running in a subprocess using a pipe, in order to
3741 try to track down a specific problem.
3743 4. Testing facility fudge: when running in the test harness and attempting
3744 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3745 getting "No route to host". Convert this to a timeout.
3747 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3750 6. Some OS don't have socklen_t but use size_t instead. This affects the
3751 fifth argument of getsockopt() amongst other things. This is now
3752 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3753 can be set for individual OS. I have set it for SunOS5, OSF1, and
3754 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3755 some earlier ones do not.
3757 7. Change 4.30/15 was not doing the test caselessly.
3759 8. The standard form for an IPv6 address literal was being rejected by address
3760 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3761 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3762 this, as well as the form without the "IPv6" on the front (but only when
3763 address literals are enabled, of course).
3765 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3767 10. Exim crashed if a message with an empty sender address specified by -f
3768 encountered a router with an errors_to setting. This could be provoked only
3769 by a command such as
3773 where an empty string was supplied; "<>" did not hit this bug.
3775 11. Installed PCRE release 4.5.
3777 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3778 remained set. It is now erased.
3780 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3781 times from message ids (which are base 36 rather than the normal 62).
3783 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3784 were being counted as actual protocol errors, and logged if the log
3785 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3786 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3787 and DATA following a set of rejected RCPTs do not count as protocol errors.
3788 In other words, Exim assumes they were pipelined, though this may not
3789 actually be the case. Of course, in all cases the client gets an
3790 appropriate error code.
3792 15. If a lookup fails in an ACL condition, a message about the failure may
3793 be available; it is used if testing the ACL cannot continue, because most
3794 such messages specify what the cause of the deferral is. However, some
3795 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3796 that caused an old message to be retained and used if a later statement
3797 caused a defer, replacing the real cause of the deferral.
3799 16. If an IP address had so many PTR records that the DNS lookup buffer
3800 was not large enough to hold them, Exim could crash while trying to process
3801 the truncated data. It now detects and logs this case.
3803 17. Further to 4.21/58, another change has been made: if (and only if) the
3804 first line of a message (the first header line) ends with CRLF, a bare LF
3805 in a subsequent header line has a space inserted after it, so as not to
3806 terminate the header.
3808 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3809 unnecessarily, used atoi() instead of strtol(), and didn't check the
3810 termination when getting file sizes from file names by regex.
3812 19. Completely re-implemented the support for maildirsize files, in the light
3813 of a number of problems with the previous contributed implementation
3814 (4.30/29). In particular:
3816 . If the quota is zero, the maildirsize file is maintained, but no quota is
3819 . If the maildir directory does not exist, it is created before any attempt
3820 to write a maildirsize file.
3822 . The quota value in the file is just a cache; if the quota is changed in
3823 the transport, the new value overrides.
3825 . A regular expression is available for excluding directories from the
3828 20. The autoreply transport checks the characters in options that define the
3829 message's headers; it allows continued headers, but it was checking with
3830 isspace() after an embedded newline instead of explicitly looking for a
3833 21. If all the "regular" hosts to which an address was routed had passed their
3834 expiry times, and had not reached their retry times, the address was
3835 bounced, even if fallback hosts were defined. Now Exim should go on to try
3838 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3839 equivalent code in the SMTP transport. Some hosts send humungous responses
3840 to HELO/EHLO, more than 1024 it seems.
3842 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3843 gives compiler warnings in some environments. I've now done it "properly",
3846 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3847 (because of problems with the built-in one) was declared to return uschar *
3848 instead of char *, causing compiler failure.
3850 25. Fixed a file descriptor leak when processing alias/forward files.
3852 26. Fixed a minor format string issue in dbfn.c.
3854 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3856 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3857 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3860 29. When a sender address is verified, it is cached, to save repeating the test
3861 when there is more than one recipient in a message. However, when the
3862 verification involves a callout, it is possible for different callout
3863 options to be set for different recipients. It is too complicated to keep
3864 track of this in the cache, so now Exim always runs a verification when a
3865 callout is required, relying on the callout cache for the optimization.
3866 The overhead is duplication of the address routing, but this should not be
3869 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3870 to be verified with callout=postmaster, and the main callout worked but the
3871 postmaster check failed, the verification correctly failed. However, if a
3872 subsequent RCPT command asked for sender verification *without* the
3873 postmaster check, incorrect caching caused this verification also to fail,
3876 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3877 it was not caching the DNS options (qualify_single, search_parents) that
3878 were used when the lookup failed. A subsequent lookup with different
3879 options therefore always gave the same answer, though there were cases
3880 where it should not have. (Example: a "domains = !$mx_any" option on a
3881 dnslookup router: the "domains" option is always processed without any
3882 widening, but the router might have qualify_single set.) Now Exim uses the
3883 cached value only when the same options are set.
3885 32. Added John Jetmore's "exipick" utility to the distribution.
3887 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3888 than a timeout (e.g. a certificate is required, and is not provided), an
3889 Exim server now closes the connection immediately. Previously it waited for
3890 the client to close - but if the client is SSL, it seems that they each
3891 wait for each other, leading to a delay before one of them times out.
3893 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3894 maintained 0.8.x compatibility because I don't think many are using it, and
3895 it is clearly obsolete.
3897 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3900 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3901 client certificate was expired. A simple patch fixes this, though I don't
3902 understand the full logic of why the verify callback is called multiple
3905 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3906 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3907 which causes problems with some clients (such as the Certicom SSL Plus
3908 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3909 disables the coutermeasure allowing Eudora to connect."
3911 38. Exim was not checking that a write() to a log file succeeded. This could
3912 lead to Bad Things if a log got too big, in particular if it hit a file
3913 size limit. Exim now panics and dies if it cannot write to a log file, just
3914 as it does if it cannot open a log file.
3916 39. Modified OS/Makefile-Linux so that it now contains
3918 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3920 The two -D definitions ensure that Exim is compiled with large file
3921 support, which makes it possible to handle log files that are bigger than
3924 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3925 instance) a domain was checked against a named list that involved a lookup,
3926 causing $domain_data to be set, then another domain was checked against the
3927 same list, then the first domain was re-checked, the value of $domain_data
3928 after the final check could be wrong. In particular, if the second check
3929 failed, it could be set empty. This bug probably also applied to
3932 41. The strip_trailing_dot option was not being applied to the address given
3933 with the -f command-line option.
3935 42. The code for reading a message's header from the spool was incrementing
3936 $received_count, but never initializing it. This meant that the value was
3937 incorrect (doubled) while delivering a message in the same process in which
3938 it was received. In the most common configuration of Exim, this never
3939 happens - a fresh exec is done - but it can happen when
3940 deliver_drop_privilege is set.
3942 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3943 it now includes up to 150 characters of the unexpected data in the log
3946 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3947 and building data strings. The size of both of these buffers was 10 000
3948 bytes - far larger than anybody would *ever* want, thought I. Needless to
3949 say, somebody hit the limit. I have increased the maximum line length to
3950 20 000 and the maximum data length of concatenated lines to 100 000. I have
3951 also fixed two bugs, because there was no checking on these buffers. Tsk,
3952 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3953 buffer is too small.
3955 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3956 lsearch lookups. Now it does.
3958 46. When parsing a route_list item in a manualroute router, a fixed-length
3959 buffer was used for the list of hosts. I made this 1024 bytes long,
3960 thinking that nobody would ever have a list of hosts that long. Wrong.
3961 Somebody had a whole pile of complicated expansion conditions, and the
3962 string was silently truncated, leading to an expansion error. It turns out
3963 that it is easier to change to an unlimited length (owing to other changes
3964 that have happened since this code was originally written) than to build
3965 structure for giving a limitation error. The length of the item that
3966 expands into the list of hosts is now unlimited.
3968 47. The lsearch lookup could not handle data where the length of text line was
3969 more than 4095 characters. Such lines were truncated, leading to shortened
3970 data being returned. It should now handle lines of any length.
3972 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3973 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3976 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3977 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3978 no longer happens in comment lines. A list of replacements is now placed
3979 at the head of all of the source files, except those whose only change is
3980 to replace PERL_COMMAND in the very first #! line.
3982 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3983 messages on the queue, with a bottom-up merge sort, using code contributed
3984 by Michael Haardt. This should make operations like -bp somewhat faster on
3985 large queues. It won't affect queue runners, except when queue_run_in_order
3988 51. Installed eximstats 1.31 in the distribution.
3990 52. Added support for SRV lookups to the dnslookup router.
3992 53. If an ACL referred to $message_body or $message_body_end, the value was not
3993 reset for any messages that followed in the same SMTP session.
3995 54. The store-handling optimization for building very long strings was not
3996 differentiating between the different store pools. I don't think this
3997 actually made any difference in practice, but I've tidied it.
3999 55. While running the routers to verify a sender address, $sender_address
4000 was still set to the sender address. This is wrong, because when routing to
4001 send a bounce to the sender, it would be empty. Therefore, I have changed
4002 it so that, while verifying a sender address, $sender_address is set to <>.
4003 (There is no change to what happens when verifying a recipient address.)
4005 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4006 target A or AAAA records (if not already returned) without resetting the
4007 qualify_single or search_parents options of the DNS resolver. These are
4008 inappropriate in this case because the targets of MX and SRV records must
4009 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4010 target that, when qualified, matched something in the local domain. These
4011 two options are now turned off when doing these lookups.
4013 57. It seems that at least some releases of Reiserfs (which does not have the
4014 concept of a fixed number of inodes) returns zero and not -1 for the
4015 number of available inodes. This interacted badly with check_spool_inodes,
4016 which assumed that -1 was the "no such thing" setting. What I have done is
4017 to check that the total number of inodes is greater than zero before doing
4018 the test of how many are available.
4020 58. When a "warn" ACL statement has a log_message modifier, the message is
4021 remembered, and not repeated. This is to avoid a lot of repetition when a
4022 message has many recipients that cause the same warning to be written.
4023 Howewer, Exim was preserving the list of already written lines for an
4024 entire SMTP session, which doesn't seem right. The memory is now reset if a
4025 new message is started.
4027 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4028 debugging output unless log_rewrite was also set.
4030 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4031 of (int)(handle) when we know that handle contains (void *)(-1).
4033 61. The Exim daemon panic-logs an error return when it closes the incoming
4034 connection. However "connection reset by peer" seems to be common, and
4035 isn't really an error worthy of noting specially, so that particular error
4038 62. When Exim is trying to find all the local interfaces, it used to panic and
4039 die if the ioctl to get the interface flags failed. However, it seems that
4040 on at least one OS (Solaris 9) it is possible to have an interface that is
4041 included in the list of interfaces, but for which you get a failure error
4042 for this call. This happens when the interface is not "plumbed" into a
4043 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4044 failure of the "get flags" call assumes that the interface is down.
4046 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4047 makes life easier for people who are doing arithmetic on fields extracted
4048 from dates, where you often get leading zeros that should not be
4049 interpreted as octal.
4051 64. Added qualify_domain to the redirect router, to override the global
4054 65. If a pathologically long header line contained very many addresses (the
4055 report of this problem mentioned 10 000) and each of them was rewritten,
4056 Exim could use up a very large amount of memory. (It kept on making new
4057 copies of the header line as it rewrote, and never released the old ones.)
4058 At the expense of a bit more processing, the header rewriting function has
4059 been changed so that it no longer eats memory in this way.
4061 66. The generation of the Received: header has been moved from the time that a
4062 message starts to be received, to the time that it finishes. The timestamp
4063 in the Received: header should now be very close to that of the <= log
4064 line. There are two side-effects of this change:
4066 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4067 logged header lines no longer include the local Received: line, because
4068 it has not yet been created. The same applies to a copy of the message
4069 that is returned to a non-SMTP sender when a message is rejected.
4071 (b) When a filter file is tested using -bf, no additional Received: header
4072 is added to the test message. After some thought, I decided that this
4075 This change does not affect the value of $received_for. It is still set
4076 after address rewriting, but before local_scan() is called.
4078 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4080 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4081 gave an unhelpful panic error message, and a defer error. I have managed to
4082 change this behaviour so that it now rejects any supplied certificate,
4083 which seems right, as the list of acceptable certificates is empty.
4085 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4086 gave an unhelpful defer error. I have not managed to make this reject any
4087 supplied certificates, but the error message it gives is "no certificate
4088 supplied", which is not helpful.
4090 70. exigrep's output now also includes lines that are not associated with any
4091 message, but which match the given pattern. Implemented by a patch from
4092 Martin Sluka, which also tidied up the Perl a bit.
4094 71. Recipient callout verification, like sender verification, was using <> in
4095 the MAIL FROM command. This isn't really the right thing, since the actual
4096 sender may affect whether the remote host accepts the recipient or not. I
4097 have changed it to use the actual sender in the callout; this means that
4098 the cache record is now keyed on a recipient/sender pair, not just the
4099 recipient address. There doesn't seem to be a real danger of callout loops,
4100 since a callout by the remote host to check the sender would use <>.
4101 [SEE ABOVE: changed after hitting problems.]
4103 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4104 temporary errors. However, in the case of such a code being given after
4105 the end of a data transmission (i.e. after ".") Exim was failing to write
4106 a retry record for the message. (Yes, there was some broken host that was
4107 actually sending 8xx at this point.)
4109 73. An unknown lookup type in a host list could cause Exim to panic-die when
4110 the list was checked. (An example that provoked this was putting <; in the
4111 middle of a list instead of at the start.) If this happened during a DATA
4112 ACL check, a -D file could be left lying around. This kind of configuration
4113 error no longer causes Exim to die; instead it causes a defer errror. The
4114 incident is still logged to the main and panic logs.
4116 74. Buglet left over from Exim 3 conversion. The message "too many messages
4117 in one connection" was written to the rejectlog but not the mainlog, except
4118 when address rewriting (yes!) was being logged.
4120 75. Added write_rejectlog option.
4122 76. When a system filter was run not as root (that is, when system_filter_user
4123 was set), the values of the $n variables were not being returned to the
4124 main process; thus, they were not subsequently available in the $sn
4127 77. Added +return_path_on_delivery log selector.
4129 78. A connection timeout was being treated differently from recipients deferred
4130 when testing hosts_max_try with a message that was older than the host's
4131 retry timeout. (The host should not be counted, thus allowing all hosts to
4132 be tried at least once before bouncing.) This may have been the cause of an
4133 occasionally reported bug whereby a message would remain on the queue
4134 longer than the retry timeout, but would be bounced if a delivery was
4135 forced. I say "may" because I never totally pinned down the problem;
4136 setting up timeout/retry tests is difficult. See also the next item.
4138 79. The ultimate address timeout was not being applied to errors that involved
4139 a combination of host plus message (for example, a timeout on a MAIL
4140 command). When an address resolved to a number of possible hosts, and they
4141 were not all tried for each delivery (e.g. because of hosts_max_try), a
4142 message could remain on the queue longer than the retry timeout.
4144 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4147 81. Fixed an obscure SMTP outgoing bug which required at least the following
4148 conditions: (a) there was another message waiting for the same server;
4149 (b) the server returned 5xx to all RCPT commands in the first message so
4150 that the message was not completed; (c) the server dropped the connection
4151 or gave a negative response to the RSET that Exim sends to abort the
4152 transaction. The observed case was a dropped connection after DATA that had
4153 been sent in pipelining mode. That is, the server had advertised PIPELINING
4154 but was not implementing it correctly. The effect of the bug was incorrect
4155 behaviour, such as trying another host, and this could lead to a crash.
4161 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4162 and daemon.c were passed as pointers to ints; they should have been
4163 pointers to socklen_t variables (which are typically unsigned ints).
4165 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4168 3. Fixed a really odd bug that affected only the testing scheme; patching a
4169 certain fixed string in the binary changed the value of another string that
4170 happened to be identical to the end of the original first string.
4172 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4173 name", it returns that address as the IP address. On some operating
4174 systems (e.g. Solaris), it also passes back the IP address string as the
4175 "host name". However, on others (e.g. Linux), it passes back an empty
4176 string. Exim wasn't checking for this, and was changing the host name to an
4177 empty string, assuming it had been canonicized.
4179 5. Although rare, it is permitted to have more than one PTR record for a given
4180 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4181 all the names associated with an address, because they do in Solaris.
4182 However, it seems that they do not in Linux for data that comes from the
4183 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4184 I found this out when I moved to a new Linux workstation and tried to run
4185 the Exim test suite.
4187 To get round this problem I have changed the code so that it now does its
4188 own call to the DNS to look up PTR records when searching for a host name.
4189 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4190 addresses that are only in /etc/hosts are still found.
4192 This behaviour is, however, controlled by an option called host_lookup_
4193 order, which defaults to "bydns:byaddr". If people want to use the other
4194 order, or indeed, just use one or the other means of lookup, they can
4195 specify it in this variable.
4197 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4198 some operating systems, this comes back from gethostbyaddr() as an empty
4199 string, and this is what Exim used to test for. However, it seems that in
4200 other systems, "." is yielded. Exim now tests for this case too.
4202 7. The values of check_spool_space and check_log_space are now held internally
4203 as a number of kilobytes instead of an absolute number of bytes. If a
4204 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4205 kilobyte. This means that much larger values can be stored.
4207 8. Exim monitor: an attempt to get the action menu when not actually pointing
4208 at a message produces an empty menu entitled "No message selected". This
4209 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4210 no entries in it ("Shell widget menu has zero width and/or height"). So I
4211 have added a single, blank menu entry in this case.
4213 9. Added ${quote_local_part.
4215 10. MIME decoding is now applied to the contents of Subject: header lines when
4218 11. Now that a reference to $sender_host_address automatically causes a reverse
4219 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4220 host lookup before query-style lookups in lists that might use this
4221 variable. This has therefore been abolished, and the "net-" prefix is no
4222 longer necessary for query-style lookups.
4224 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4225 have been a typo for LFLAGS, so it has been changed.
4227 13. The install script calls Exim with "-C /dev/null" in order to find the
4228 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4229 to be output. Howeve, since Exim outputs its version number before the
4230 error, it didn't break the script. It just looked ugly. I fixed this by
4231 always allowing "-C /dev/null" if the caller is root.
4233 14. Ignore overlarge ACL variable number when reading spool file - insurance
4234 against a later release with more variables having written the file.
4236 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4237 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4238 this, as well as the form without the "IPv6" on the front.
4240 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4241 OS/Makefile-Darwin file.
4243 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4244 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4246 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4247 variable. However, some OS use ints for inodes. I've added cast to long int
4248 to get rid of the compiler warning.
4250 19. I had forgotten to lock out "/../" in configuration file names when
4251 ALT_CONFIG_PREFIX was set.
4253 20. Routers used for verification do not need to specify transports. However,
4254 if such a router generated a host list, and callout was configured, Exim
4255 crashed, because it could not find a port number from the (non-existent)
4256 transport. It now assumes port 25 in this circumstance.
4258 21. Added the -t option to exigrep.
4260 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4261 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4262 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4263 them is set, LOOKUP_LSEARCH is forced.
4265 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4267 24. Added sender and host information to the "rejected by local_scan()" log
4268 line; previously there was no indication of these.
4270 25. Added .include_if_exists.
4272 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4273 Linux. It turns out that not all file systems support this. Apparently some
4274 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4275 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4276 not supported on the file descriptor, is now ignored when Exim is trying to
4277 sync a directory. This applies only to Linux.
4279 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4281 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4282 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4285 29. Added support for maildirsize files from supplied patch (modified a bit).
4287 30. The use of :fail: followed by an empty string could lead Exim to respond to
4288 sender verification failures with (e.g.):
4290 550 Verification failed for <xxx>
4291 550 Sender verify failed
4293 where the first response line was missing the '-' that indicates it is not
4294 the final line of the response.
4296 31. The loop for finding the name of the user that called Exim had a hardwired
4297 limit of 10; it now uses the value of finduser_retries, which is used for
4298 all other user lookups.
4300 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4303 33. Exim was neglecting to zero errno before one call of strtol() when
4304 expanding a string and expecting an integer value. On some systems this
4305 resulted in spurious "integer overflow" errors. Also, it was casting the
4306 result into an int without checking.
4308 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4309 did not work. The code looks as if it has *never* worked, though it appears
4310 to have been documented since at least releast 1.62. I have made it work.
4312 35. The "timeout_DNS" error in retry rules, also documented since at least
4313 1.62, also never worked. As it isn't clear exactly what this means, and
4314 clearly it isn't a major issue, I have abolished the feature by treating it
4315 as "timeout", and writing a warning to the main and panic logs.
4317 36. The display of retry rules for -brt wasn't always showing the error code
4320 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4321 timeout_connect_A, timeout_connect_MX.
4323 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4324 to the empty sender.
4326 39. The daemon was not analysing the content of -oX till after it had closed
4327 stderr and disconnected from the controlling terminal. This meant that any
4328 syntax errors were only noted on the panic log, and the return code from
4329 the command was 0. By re-arranging the code a little, I've made the
4330 decoding happen first, so such errors now appear on stderr, and the return
4331 code is 1. However, the actual setting up of the sockets still happens in
4332 the disconnected process, so errors there are still only recorded on the
4335 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4336 connections (as happens on some IP stacks) was logged at start up time as
4337 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4338 it from "IPv6 and IPv4", which means that two separate sockets are being
4341 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4342 says whether AF_INET or AF_INET6 was passed as an argument.
4344 42. Exiwhat output was messed up when time zones were included in log
4347 43. Exiwhat now gives more information about the daemon's listening ports,
4348 and whether -tls-on-connect was used.
4350 44. The "port" option of the smtp transport is now expanded.
4352 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4353 silently ignored. Now an error message is written to the main and panic
4356 46. There's a new ACL modifier called "logwrite" which writes to a log file
4357 as soon as it is encountered.
4359 47. Added $local_user_uid and $local_user_gid at routing time.
4361 48. Exim crashed when trying to verify a sender address that was being
4364 49. Exim was recognizing only a space character after ".include". It now also
4365 recognizes a tab character.
4367 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4368 extracting the relevant information from the specification. The man page no
4369 longer contains scrambled data for the -d option, and I've added a section
4370 at the front about calling Exim under different names.
4372 51. Added "extra_headers" argument to the "mail" command in filter files.
4374 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4377 53. Installed eximstats 1.29.
4379 54. Added transport_filter_timeout as a generic transport option.
4381 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4382 Cc: header lines. This was required by RFC 822, but it not required by RFC
4385 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4386 incoming messages that did not have them. Now it does so only if the
4387 message originates locally, that is, if there is no associated remote host
4388 address. When Resent- header lines are present, this applies to the Resent-
4389 lines rather than the non-Resent- lines.
4391 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4392 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4394 58. Messages for configuration errors now include the name of the main
4395 configuration file - useful now that there may be more than one file in a
4396 list (.included file names were always shown).
4398 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4399 for those rare installations that do not start the daemon as root or run it
4400 setuid root. I've cut out the call to initgroups() if the daemon is not
4403 60. The Exim user and group can now be bound into the binary as text strings
4404 that are looked up at the start of Exim's processing.
4406 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4408 62. Added $mailstore_basename variable.
4410 63. Installed patch to sieve.c from Michael Haardt.
4412 64. When Exim failed to open the panic log after failing to open the main log,
4413 the original message it was trying to log was written to stderr and debug
4414 output, but if they were not available (the usual case in production), it
4415 was lost. Now it is written to syslog before the two lines that record the
4416 failures to open the logs.
4418 65. Users' Exim filters run in subprocesses under the user's uid. It is
4419 possible for a "deliver" command or an alias in a "personal" command to
4420 provoke an address rewrite. If logging of address rewriting is configured,
4421 this fails because the process is not running as root or exim. There may be
4422 a better way of dealing with this, but for the moment (because 4.30 needs
4423 to be released), I have disabled address rewrite logging when running a
4424 filter in a non-root, non-exim process.
4430 1. The buildconfig auxiliary program wasn't quoting the value set for
4431 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4432 not defined. This bug was masked in 4.22 by the effect that was fixed in
4435 2. Some messages that were rejected after a message id was allocated were
4436 shown as "incomplete" by exigrep. It no longer does this for messages that
4437 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4439 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4440 have allow_domain_literals set, the ID did not get logged in the <= line.
4441 Domain literals are now always recognized in Message-ID: header lines.
4443 4. The first argument for a ${extract expansion item is the key name or field
4444 number. Leading and trailing spaces in this item were not being ignored,
4445 causing some misleading effects.
4447 5. When deliver_drop_privilege was set, single queue runner processes started
4448 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4449 same command in the process it spins off) were not dropping privilege.
4451 6. When the daemon running as "exim" started a queue runner, it always
4452 re-executed Exim in the spun-off process. This is a waste of effort when
4453 deliver_drop_privilege is set. The new process now just calls the
4454 queue-runner function directly.
4460 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4463 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4464 ignored. Though the use of -oP was forcing the writing of a pid file, it
4465 was always written to the default place.
4467 3. If the message "no IP address found for host xxxx" is generated during
4468 incoming verification, it is now followed by identification of the incoming
4469 connection (so you can more easily find what provoked it).
4471 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4473 5. Added some features to "harden" Exim a bit more against certain attacks:
4475 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4476 be put in Local/Makefile. This is like the never_users runtime option,
4477 but it cannot be overridden. The default setting is "root".
4479 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4480 prefix string with which any file named in a -C command line option
4483 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4484 is retained for -C and -D only if the caller of Exim is root. Without
4485 it, the exim user may also use -C and -D and retain privilege.
4487 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4488 command line option is disabled.
4490 6. Macro names set by the -D option must start with an upper case letter, just
4491 like macro names defined in the configuration file.
4493 7. Added "dereference=" facility to LDAP.
4495 8. Two instances of the typo "uknown" in the source files are fixed.
4497 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4498 the Configure-Makefile script screwed up while processing it.
4500 10. Incorporated PCRE 4.4.
4502 11. The SMTP synchronization check was not operating right at the start of an
4503 SMTP session. For example, it could not catch a HELO sent before the client
4504 waited for the greeting. There is now a check for outstanding input at the
4505 point when the greeting is written. Because of the duplex, asynchronous
4506 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4507 way, but not yet received, when the check is performed.
4509 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4510 on TCP/IP sockets, because this apparently causes some broken clients to
4513 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4514 unchanged) from the Cygwin maintainer.
4516 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4517 was supported instead of testing for mbx. Effectively a typo.
4519 15. The spa authenticator server code was not checking that the input it
4520 received was valid base64.
4522 16. The debug output line for the "set" modifier in ACLs was not showing the
4523 name of the variable that was being set.
4525 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4527 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4528 lookup on its own. Something else was needed to trigger the lookup. For
4529 example, a match in host_lookup or the need for a host name in a host list.
4530 Now, if $sender_host_name is referenced and the host name has not yet been
4531 looked up, a lookup is performed. If the lookup fails, the variable remains
4532 empty, and $host_lookup_failed is set to "1".
4534 19. Added "eqi" as a case-independent comparison operator.
4536 20. The saslauthd authentication condition could segfault if neither service
4537 nor realm was specified.
4539 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4540 error message that was logged was misleading, and incoming SMTP
4541 connections were dropped. The message is now more accurate, and temporary
4542 errors are given to SMTP connections.
4544 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4545 (except RSET) with a 421 error, until QUIT is received. However, it was
4546 failing to send a response to QUIT.
4548 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4549 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4550 ACL is now run after the helo_try_verify_hosts code.
4552 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4553 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4554 case-independent, so other case variants are also recognized). Apparently
4555 some systems use these upper case variants.
4557 25. If more than two messages were waiting for the same host, and a transport
4558 filter was specified for the transport, Exim sent two messages over the
4559 same TCP/IP connection, and then failed with "socket operation on non-
4560 socket" when it tried to send the third.
4562 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4564 27. The extern definition of crypt16() in expand.c was not being excluded when
4565 the OS had its own crypt16() function.
4567 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4568 as a preferred synonym for return_size_limit, both as an option and as an
4571 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4573 30. Changed the default configuration ACL to relax the local part checking rule
4574 for addresses that are not in any local domains. For these addresses,
4575 slashes and pipe symbols are allowed within local parts, but the sequence
4576 /../ is explicitly forbidden.
4578 31. SPA server authentication was not clearing the challenge buffer before
4581 32. log_message in a "warn" ACL statement was writing to the reject log as
4582 well as to the main log, which contradicts the documentation and doesn't
4583 seem right (because no rejection is happening). So I have stopped it.
4585 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4586 However, I am unable to do any testing of this.
4588 34. Fixed an infelicity in the appendfile transport. When checking directories
4589 for a mailbox, to see if any needed to be created, it was accidentally
4590 using path names with one or more superfluous leading slashes; tracing
4591 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4593 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4594 contents are added to the log line that is written for every discarded
4595 recipient. (Previously a log_message setting was ignored.)
4597 36. The ${quote: operator now quotes the string if it is empty.
4599 37. The install script runs exim in order to find its version number. If for
4600 some reason other than non-existence or emptiness, which it checks, it
4601 could not run './exim', it was installing it with an empty version number,
4602 i.e. as "exim-". This error state is now caught, and the installation is
4605 38. An argument was missing from the function that creates an error message
4606 when Exim fails to connect to the socket for saslauthd authentication.
4607 This could cause Exim to crash, or give a corrupted message.
4609 39. Added isip, isip4, and isip6 to ${if conditions.
4611 40. The ACL variables $acl_xx are now saved with the message, and can be
4612 accessed later in routers, transports, and filters.
4614 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4615 strings in the file are not string-expanded.
4617 42. If a MAIL command specified a SIZE value that was too large to fit into an
4618 int variable, the check against message_size_limit failed. Such values are
4619 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4620 day this will have to be increased, but I don't think I want to be around
4621 when emails are that large.
4628 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4629 iconv() is not standard in FreeBSD.
4631 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4632 IPv6 enabled. The observed symptom was a segmentation fault on return from
4633 the function os_common_find_running_interfaces() in src/os.c.
4635 3. In the check_special_case() function in daemon.c I had used "errno" as an
4636 argument name, which causes warnings on some systems. This was basically a
4637 typo, since it was named "eno" in the comments!
4639 4. The code that waits for the clock to tick (at a resolution of some fraction
4640 of a second) so as to ensure message-id uniqueness was always waiting for
4641 at least one whole tick, when it could have waited for less. [This is
4642 almost certainly not relevant at current processor speeds, where it is
4643 unlikely to ever wait at all. But we try to future-proof.]
4645 5. The function that sleeps for a time interval that includes fractions of a
4646 second contained a race. It did not block SIGALRM between setting the
4647 timer, and suspending (a couple of lines later). If the interval was short
4648 and the sigsuspend() was delayed until after it had expired, the suspension
4649 never ended. On busy systems this could lead to processes getting stuck for
4652 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4653 process, before it forks any delivery processes. The open lookup caching
4654 mechanism meant that the open file or database connection was passed into
4655 the delivery process. The problem was that delivery processes always tidy
4656 up cached lookup data. This could cause a problem for the next delivery
4657 process started by the queue runner, because the external queue runner
4658 process does not know about the closure. So the next delivery process
4659 still has data in the lookup cache. In the case of a file lookup, there was
4660 no problem because closing a file descriptor in a subprocess doesn't affect
4661 the parent. However, if the lookup was caching a connection to a database,
4662 the connection was closed, and the second delivery process was likely to
4663 see errors such as "PGSQL: query failed: server closed the connection
4664 unexpectedly". The problem has been fixed by closing all cached lookups
4665 in a queue runner before running a delivery process.
4667 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4668 seem to have the "const" qualifier which it has on other OS. I've
4671 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4672 *of the same type* (client or server) with the same public name that an
4673 error should be diagnosed.
4675 9. When Exim looked up a host name for an IP address, but failed to find the
4676 original IP address when looking up the host name (a safety check), it
4677 output the message "<ip address> does not match any IP for NULL", which was
4678 confusing, to say the least. The bug was that the host name should have
4679 appeared instead of "NULL".
4681 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4682 user that is built into the binary, and the -C or -D options is used, root
4683 privilege is dropped before the configuration file is read. In addition,
4684 logging is switched to stderr instead of the normal log files. If the
4685 configuration then re-defines the Exim user, the unprivileged environment
4686 is probably not what is expected, so Exim logs a panic warning message (but
4689 However, if deliver_drop_privilege is set, the unprivileged state may well
4690 be exactly what is intended, so the warning has been cut out in that case,
4691 and Exim is allowed to try to write to its normal log files.
4697 1. smtp_return_error_details was not giving details for temporary sender
4698 or receiver verification errors.
4700 2. Diagnose a configuration error if two authenticators have the same public
4703 3. Exim used not to create the message log file for a message until the first
4704 delivery attempt. This could be confusing when incoming messages were held
4705 for policy or load reasons. The message log file is now created at the time
4706 the message is received, and an initial "Received" line is written to it.
4708 4. The automatically generated man page for command line options had a minor
4709 bug that caused no ill effects; however, a more serious problem was that
4710 the procedure for building the man page automatically didn't always
4711 operate. Consequently, release 4.20 contains an out-of-date version. This
4712 shouldn't happen again.
4714 5. When building Exim with embedded Perl support, the script that builds the
4715 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4716 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4718 6. The freeze_tell option was not being used for messages that were frozen on
4719 arrival, either by an ACL or by local_scan().
4721 7. Added the smtp_incomplete_transaction log selector.
4723 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4724 was accepting AUTH without a new EHLO.
4726 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4727 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4730 10. Logging of TCP/IP connections (when configured) now happens in the main
4731 daemon process instead of the child process, so that the TCP/IP connection
4732 count is more accurate (but it can never be perfect).
4734 11. The use of "drop" in a nested ACL was not being handled correctly in the
4735 outer ACL. Now, if condition failure induced by the nested "drop" causes
4736 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4737 or "require"), the connection is dropped.
4739 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4740 that yield "discard" can now be used with an "accept" or a "discard" verb,
4741 but an error is generated for any others (because I can't see a useful way
4742 to define what should happen).
4744 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4745 are now processed in the same way as lines in the Exim configuration file.
4746 In particular, continuation lines are supported.
4748 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4750 15. Added -ti meaning -t -i.
4752 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4753 domains, and warn by logging if others are found.
4755 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4756 returned from GIFCONF when Exim is trying to find the list of interfaces on
4757 a host. The code in os.c has been modified to copy each ifreq to an aligned
4758 structure in all cases.
4760 Also, in some cases, the returned ifreq's were being copied to a 'struct
4761 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4762 means the last couple of bytes of an IPv6 address could be chopped if the
4763 ifreq contained only a normal sockaddr (14 bytes storage).
4765 18. Named domain lists were not supported in the hosts_treat_as_local option.
4766 An entry such as +xxxx was not recognized, and was treated as a literal
4769 19. Ensure that header lines added by a DATA ACL are included in the reject log
4770 if the ACL subsequently rejects the message.
4772 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4773 MD5 (which is deprecated).
4775 21. When testing a filter file using -bf, Exim was writing a message when it
4776 took the sender from a "From " line in the message, but it was not doing so
4777 when it took $return_path from a Return-Path: header line. It now does.
4779 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4780 with a valid header line field name (a series of printing characters
4781 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4783 23. Changed "disc" in the source to "disk" to conform to the documentation and
4784 the book and for uniformity.
4786 24. Ignore Sendmail's -Ooption=value command line item.
4788 25. When execve() failed while trying to run a command in a pipe transport,
4789 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4790 could be confused with a return value of 69 from the command itself. This
4791 has been changed to 127, the value the shell returns if it is asked to run
4792 a non-existent command. The wording for the related log line suggests a
4793 non-existent command as the problem.
4795 26. If received_header_text expands to an empty string, do not add a Received:
4796 header line to the message. (Well, it adds a token one on the spool, but
4797 marks it "old" so that it doesn't get used or transmitted.)
4799 27. Installed eximstats 1.28 (addition of -nt option).
4801 28. There was no check for failure on the call to getsockname() in the daemon
4802 code. This can fail if there is a shortage of resources on the system, with
4803 ENOMEM, for example. A temporary error is now given on failure.
4805 29. Contrary to the C standard, it seems that in some environments, the
4806 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4807 program. Exim now does this explicitly; it affects the formatting of
4808 timestamps using strftime().
4810 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4811 complaints. I've now initialized all the variables, to avoid this.
4813 32. Header lines added by a system filter were not being "seen" during
4814 transport-time rewrites.
4816 33. The info_callback() function passed to OpenSSL is set up with type void
4817 (*)(SSL *, int, int), as described somewhere. However, when calling the
4818 function (actually a macro) that sets it up, the type void(*)() is
4819 expected. I've put in a cast to prevent warnings from picky compilers.
4821 34. If a DNS black list lookup found a CNAME record, but there were no A
4822 records associated with the domain it pointed at, Exim crashed.
4824 35. If a DNS black list lookup returned more than one A record, Exim ignored
4825 all but the first. It now scans all returned addresses if a particular IP
4826 value is being sought. In this situation, the contents of the
4827 $dnslist_value variable are a list of all the addresses, separated by a
4830 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4831 to accept a host name and all its aliases if the forward lookup for any of
4832 them yielded the IP address of the incoming connection. Now it accepts only
4833 those names whose forward lookup yields the correct IP address. Any other
4834 names are discarded. This closes a loophole whereby a rogue DNS
4835 administrator could create reverse DNS records to break through a
4836 wildcarded host restriction in an ACL.
4838 37. If a user filter or a system filter that ran in a subprocess used any of
4839 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4840 the wrong values were passed to the pipe command ($thisaddress had the
4841 value of $0, $0 had the value of $1, etc). This bug was introduced by
4842 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4844 38. Improved the line breaking for long SMTP error messages from ACLs.
4845 Previously, if there was no break point between 40 and 75 characters, Exim
4846 left the rest of the message alone. Two changes have been made: (a) I've
4847 reduced the minimum length to 35 characters; (b) if it can't find a break
4848 point between 35 and 75 characters, it looks ahead and uses the first one
4849 that it finds. This may give the occasional overlong line, but at least the
4850 remaining text gets split now.
4852 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4853 file descriptors might be low, and that setting 1000 would always raise it.
4854 It turns out that in some environments, the limit is already over 1000 and
4855 that lowering it causes trouble. So now Exim takes care not to decrease it.
4857 40. When delivering a message, the value of $return_path is set to $sender_
4858 address at the start of routing (routers may change the value). By an
4859 oversight, this default was not being set up when an address was tested by
4860 -bt or -bv, which affected the outcome if any router or filter referred to
4863 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4864 log only when "message" or "log_message" are set. However, if one of the
4865 conditions was an address verification, or a call to a nested ACL, the
4866 messages generated by the underlying test were being passed through. This
4867 no longer happens. The underlying message is available in $acl_verify_
4868 message for both "message" and "log_message" expansions, so it can be
4869 passed through if needed.
4871 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4872 new expansion $bh_ to give the encoded byte string without charset
4873 translation. Translation happens only if iconv() is available; HAVE_ICONV
4874 indicates this at build time. HEADERS_CHARSET gives the charset to
4875 translate to; headers_charset can change it in the configuration, and
4876 "headers charset" can change it in an individual filter file.
4878 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4879 that creates RFC 2047 encoded "words" labels them as that charset instead
4880 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4881 expansion operator; (ii) when Exim creates a From: line for a local
4882 message; (iii) when a header line is rewritten to include a "phrase" part.
4884 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4885 buggy, causing it to skip the first lines of messages whose message ID
4886 ended in 'D'. This would not have bitten before Exim release 4.14, because
4887 message IDs were unlikely to end in 'D' before then. The effect was to have
4888 incorrect size information for certain domains.
4890 45. #include "config.h" was missing at the start of the crypt16.c module. This
4891 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4894 46. If there was a timeout during a "random" callout check, Exim treated it as
4895 a failure of the random address, and carried on sending RSET and the real
4896 address. If the delay was just some slowness somewhere, the response to the
4897 original RCPT would be taken as a response to RSET and so on, causing
4898 mayhem of various kinds.
4900 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4901 when I implemented it. It didn't allow for the fact that some option values
4902 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4903 the right test for positive values.
4905 48. Domain names in DNS records are case-independent. Exim always looks them up
4906 in lower case. Some resolvers return domain names in exactly the case they
4907 appear in the zone file, that is, they may contain uppercase letters. Not
4908 all resolvers do this - some return always lower case. Exim was treating a
4909 change of case by a resolver as a change of domain, similar to a widening
4910 of a domain abbreviation. This triggered its re-routing code and so it was
4911 trying to route what was effectively the same domain again. This normally
4912 caused routing to fail (because the router wouldn't handle the domain
4913 twice). Now Exim checks for this case specially, and just changes the
4914 casing of the domain that it ultimately uses when it transmits the message
4917 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4920 50. If a filter generated a file delivery with a non-absolute name (possible if
4921 no home directory exists for the router), the forbid_file option was not
4924 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4925 the existing equality matching.
4927 52. Exim was using ints instead of ino_t variables in some places where it was
4928 dealing with inode numbers.
4930 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4931 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4932 called TMPDIR, and if it finds it is different, it changes its value.
4934 54. The smtp_printf() function is now made available to local_scan() so
4935 additional output lines can be written before returning. There is also an
4936 smtp_fflush() function to enable the detection of a dropped connection.
4937 The variables smtp_input and smtp_batched_input are exported to
4940 55. Changed the default runtime configuration: the message "Unknown user"
4941 has been removed from the ACL, and instead placed on the localuser router,
4942 using the cannot_route_message feature. This means that any verification
4943 failures that generate their own messages won't get overridden. Similarly,
4944 the "Unrouteable address" message that was in the ACL for unverifiable
4945 relay addresses has also been removed.
4947 56. Added hosts_avoid_esmtp to the smtp transport.
4949 57. The exicyclog script was not checking for the esoteric option
4950 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4951 will work only if exicyclog is run under the appropriate euid.
4953 58. Following a discussion on the list, the rules by which Exim recognises line
4954 endings on incoming messages have been changed. The -dropcr and drop_cr
4955 options are now no-ops, retained only for backwards compatibility. The
4956 following line terminators are recognized: LF CRLF CR. However, special
4957 processing applies to CR:
4959 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4960 nor a local message in the state where . is a terminator.
4962 (ii) If a bare CR is encountered in a header line, an extra space is added
4963 after the line terminator so as not to end the header. The reasoning
4964 behind this is that bare CRs in header lines are most likely either
4965 to be mistakes, or people trying to play silly games.
4967 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4968 was being incorrectly given as 18 bytes larger than it should have been.
4969 This is a VOB (very old bug).
4971 60. This may never have affected anything current, but just in case it has:
4972 When the local host is found other than at the start of a list of hosts,
4973 the local host, those with the same MX, and any that follow, are discarded.
4974 When the list in question was part of a longer list of hosts, the following
4975 hosts (not currently being processed) were also being discarded. This no
4976 longer happens. I'm not sure if this situation could ever has previously
4979 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4982 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4983 header. This is something that is recommended in a new Internet Draft, and
4984 is something that is documented as being done by Sendmail. There are two
4985 possible values. For messages generated by the autoreply transport, Exim
4988 Auto-Submitted: auto-replied
4990 whereas for all other generated messages (e.g. bounces) it adds
4992 Auto-Submitted: auto-generated
4994 63. The "personal" condition in filters now includes a test for the
4995 Auto-Submitted: header. If it contains the string "auto-" the message it
4996 not considered personal.
4998 64. Added rcpt_include_affixes as a generic transport option.
5000 65. Added queue_only_override (default true).
5002 66. Added the syslog_duplication option.
5004 67. If what should have been the first header line of a message consisted of
5005 a space followed by a colon, Exim was mis-interpreting it as a header line.
5006 It isn't of course - it is syntactically invalid and should therefore be
5007 treated as the start of the message body. The misbehaviour could have
5008 caused a number of strange effects, including loss of data in subsequent
5009 header lines, and spool format errors.
5011 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5012 client host had authenticated. This control can now be exercised by an ACL
5013 for more flexibility.
5015 69. By default, callouts do not happen when testing with -bh. There is now a
5016 variant, -bhc, which does actually run the callout code, including
5017 consulting and updating the callout cache.
5019 70. Added support for saslauthd authentication, courtesy of Alexander
5022 71. If statvfs() failed on the spool or log directories while checking their
5023 size for availability, Exim confusingly gave the error "space shortage".
5024 Furthermore, in debugging mode it crashed with a floating point exception.
5025 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5026 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5027 serious problem, Exim now writes to the main and panic logs when this
5028 happens, with details of the failure. It then refuses to accept the
5029 incoming message, giving the message "spool directory problem" or "log
5030 directory problem" with a 421 code for SMTP messages.
5032 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5033 0, 1, and 2 exist, because some OS complain for execs without them (see
5034 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5035 descriptors. However, the code omitted to check that the open succeeded,
5036 causing mysterious errors if for some reason the permissions on /dev/null
5037 got screwed. Now Exim writes a message to the main and panic logs, and
5038 bombs out if it can't open /dev/null.
5040 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5041 interact so that it is all more flexible. It is supposed to remain
5042 backwards compatible. Also added extra_local_interfaces.
5044 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5045 to bomb out with an assertion failure - to the client this appears as a
5046 connection drop. This problem occurs in the part of the code that was taken
5047 from the Samba project. Fortunately, the assertion is in a very simple
5048 function, so I have fixed this by reproducing the function inline in the
5049 one place where it is called, and arranging for authentication to fail
5050 instead of killing the process with assert().
5052 75. The SPA client code was not working when the server requested OEM rather
5053 than Unicode encoding.
5055 76. Added code to make require_files with a specific uid setting more usable in
5056 the case where statting the file as root fails - usually a non-root-mounted
5057 NFS file system. When this happens and the failure is EACCES, Exim now
5058 forks a subprocess and does the per-uid checking as the relevant uid.
5060 77. Added process_log_path.
5062 78. If log_file_path was not explicitly set, a setting of check_log_space or
5063 check_log_inodes was ignored.
5065 79. If a space check for the spool or log partitions fails, the incident is now
5066 logged. Of course, in the latter case the data may get lost...
5068 80. Added the %p formatting code to string_format() so that it can be used to
5069 print addresses in debug_print(). Adjusted all the address printing in the
5070 debugging in store.c to use %p rather than %d.
5072 81. There was a concern that a line of code in smtp_in.c could overflow a
5073 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5074 initially expressed, the concern was not well-founded, because trailing
5075 spaces are removed early. However, if the trailing spaces were followed by
5076 a NULL, they did not get removed, so the overflow was possible. Two fixes
5079 (a) I re-wrote the offending code in a cleaner fashion.
5080 (b) If an incoming SMTP command contains a NULL character, it is rejected
5083 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5084 runs initgroups(), so that if the Exim user is in any additional groups,
5085 they will be used during message reception.
5091 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob