1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.619 2010/06/05 10:16:36 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.
19 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
21 PP/05 Bugzilla 834: provide a permit_codedump option for pipe transports.
23 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
29 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
31 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
33 NM/01 Bugzilla 965: Support mysql stored procedures.
34 Patch from Alain Williams
36 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
38 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
39 Patch from Andreas Metzler
41 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
42 Patch from Kirill Miazine
44 NM/05 Bugzilla 671: Added umask to procmail example.
46 JJ/03 installed exipick 20100323.0, fixing doc bug
48 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
49 directory. Notification and patch from Dan Rosenberg.
51 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
53 TK/02 Improve log output when DKIM signing operation fails.
55 MH/01 Treat the transport option dkim_domain as a colon separated
56 list, not as a single string, and sign the message with each element,
57 omitting multiple occurences of the same signer.
59 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
60 Bugzilla 985, 986. Patch by Simon Arlott
62 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
65 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
66 MBX locking. Notification from Dan Rosenberg.
72 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
74 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
76 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
78 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
80 NM/04 Bugzilla 915: Flag broken perl installation during build.
86 TK/01 Added patch by Johannes Berg that expands the main option
87 "spamd_address" if it starts with a dollar sign.
89 TK/02 Write list of recipients to X-Envelope-Sender header when building
90 the mbox-format spool file for content scanning (suggested by Jakob
93 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
94 (http://www.dcc-servers.net/) support via dccifd. Activated by
95 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
97 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
98 by Mark Daniel Reidel <mr@df.eu>.
100 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
101 When building exim an external PCRE library is now needed -
102 PCRE is a system library on the majority of modern systems.
103 See entry on PCRE_LIBS in EDITME file.
105 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
106 conversation. Added nologin parameter to request.
107 Patch contributed by Kirill Miazine
109 TF/01 Do not log submission mode rewrites if they do not change the address.
111 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
113 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
114 log files in place. Contributed by Roberto Lima
116 NM/04 Bugzilla 667: close socket used by dovecot authenticator
118 TF/03 Bugzilla 615: When checking the local_parts router precondition
119 after a local_part_suffix or local_part_prefix option, Exim now
120 does not use the address's named list lookup cache, since this
121 contains cached lookups for the whole local part.
123 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
124 Robert Millan. Documentation is in experimental-spec.txt
126 TF/04 Bugzilla 668: Fix parallel build (make -j).
128 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
130 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
131 Patch provided by Jan Srzednicki
133 TF/05 Leading white space used to be stripped from $spam_report which
134 wrecked the formatting. Now it is preserved.
136 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
137 that they are available at delivery time.
139 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
141 TF/08 TLS error reporting now respects the incoming_interface and
142 incoming_port log selectors.
144 TF/09 Produce a more useful error message if an SMTP transport's hosts
145 setting expands to an empty string.
147 NM/06 Bugzilla 744: EXPN did not work under TLS.
148 Patch provided by Phil Pennock
150 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
151 Patch provided by Richard Godbee
153 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
154 acl_smtp_notquit, added index entry.
156 NM/09 Bugzilla 787: Potential buffer overflow in string_format
157 Patch provided by Eugene Bujak
159 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
160 Patch provided by Maxim Dounin
162 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
163 Patch provided by Phil Pennock
165 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
167 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
168 Patch provided by Brad "anomie" Jorsch
170 NM/14 Bugzilla 622: Added timeout setting to transport filter.
171 Patch provided by Dean Brooks
173 TK/05 Add native DKIM support (does not depend on external libraries).
175 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
176 Patch provided by Graeme Fowler
178 NM/16 Bugzilla 851: Documentation example syntax fix.
180 NM/17 Changed NOTICE file to remove references to embedded PCRE.
182 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
184 NM/19 Bugzilla 745: TLS version reporting
185 Patch provided by Phil Pennock
187 NM/20 Bugzilla 167: bool: condition support
188 Patch provided by Phil Pennock
190 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
191 Patch provided by Phil Pennock
193 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
194 Patch provided by Brad "anomie" Jorsch
196 NM/23 Bugzilla 687: Fix misparses in eximstats
197 Patch provided by Heiko Schlittermann
199 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
200 Patch provided by Heiko Schlittermann
202 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
203 plus update to original patch.
205 NM/26 Bugzilla 799: Documentation correction for ratelimit
207 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
208 Patch provided by David Brownlee
210 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
212 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
214 NM/30 Bugzilla 888: TLS documentation bugfixes
216 NM/31 Bugzilla 896: Dovecot buffer overrun fix
218 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
219 Unlike the original bugzilla I have changed all shell scripts in src tree
221 NM/33 Bugzilla 898: Transport filter timeout fix
222 Patch by Todd Rinaldo
224 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
225 Patch by Serge Demonchaux
227 NM/35 Bugzilla 39: Base64 decode bug fixes
228 Patch by Jakob Hirsch
230 NM/36 Bugzilla 909: Correct connect() call in dcc code
232 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
234 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
236 NM/39 Bugzilla 911: Fixed MakeLinks build script
242 TK/01 Add preliminary DKIM support. Currently requires a forked version of
243 ALT-N's libdkim that I have put here:
244 http://duncanthrax.net/exim-experimental/
246 Note to Michael Haardt: I had to rename some vars in sieve.c. They
247 were called 'true' and it seems that C99 defines that as a reserved
248 keyword to be used with 'bool' variable types. That means you could
249 not include C99-style headers which use bools without triggering
250 build errors in sieve.c.
252 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
253 as mailq or other aliases. Changed the --help handling significantly
254 to do whats expected. exim_usage() emits usage/help information.
256 SC/01 Added the -bylocaldomain option to eximstats.
258 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
260 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
262 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
268 PH/01 Another patch from the Sieve maintainer.
270 PH/02 When an IPv6 address is converted to a string for single-key lookup
271 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
272 dots are used instead of colons so that keys in lsearch files need not
273 contain colons. This was done some time before quoting was made available
274 in lsearch files. However, iplsearch files do require colons in IPv6 keys
275 (notated using the quote facility) so as to distinguish them from IPv4
276 keys. This meant that lookups for IP addresses in host lists did not work
277 for iplsearch lookups.
279 This has been fixed by arranging for IPv6 addresses to be expressed with
280 colons if the lookup type is iplsearch. This is not incompatible, because
281 previously such lookups could never work.
283 The situation is now rather anomolous, since one *can* have colons in
284 ordinary lsearch keys. However, making the change in all cases is
285 incompatible and would probably break a number of configurations.
287 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
290 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
291 conversion specification without a maximum field width, thereby enabling
292 a rogue spamd server to cause a buffer overflow. While nobody in their
293 right mind would setup Exim to query an untrusted spamd server, an
294 attacker that gains access to a server running spamd could potentially
295 exploit this vulnerability to run arbitrary code as the Exim user.
297 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
298 $primary_hostname instead of what libspf2 thinks the hosts name is.
300 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
301 a directory entry by the name of the lookup key. Previously, if a
302 symlink pointed to a non-existing file or a file in a directory that
303 Exim lacked permissions to read, a lookup for a key matching that
304 symlink would fail. Now it is enough that a matching directory entry
305 exists, symlink or not. (Bugzilla 503.)
307 PH/03 The body_linecount and body_zerocount variables are now exported in the
310 PH/04 Added the $dnslist_matched variable.
312 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
313 This means they are set thereafter only if the connection becomes
316 PH/06 Added the client_condition to authenticators so that some can be skipped
317 by clients under certain conditions.
319 PH/07 The error message for a badly-placed control=no_multiline_responses left
320 "_responses" off the end of the name.
322 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
324 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
325 (without spaces) instead of just copying the configuration text.
327 PH/10 Added the /noupdate option to the ratelimit ACL condition.
329 PH/11 Added $max_received_linelength.
331 PH/12 Added +ignore_defer and +include_defer to host lists.
333 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
334 way in which PCRE > 7.0 is built.
336 PH/14 Implemented queue_only_load_latch.
338 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
339 MAIL command. The effect was to mangle the value on 64-bit systems.
341 PH/16 Another patch from the Sieve maintainer.
343 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
345 PH/18 If a system quota error occurred while trying to create the file for
346 a maildir delivery, the message "Mailbox is full" was not appended to the
347 bounce if the delivery eventually timed out. Change 4.67/27 below applied
348 only to a quota excession during the actual writing of the file.
350 PH/19 It seems that peer DN values may contain newlines (and other non-printing
351 characters?) which causes problems in log lines. The DN values are now
352 passed through string_printing() before being added to log lines.
354 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
355 and InterBase are left for another time.)
357 PH/21 Added message_body_newlines option.
359 PH/22 Guard against possible overflow in moan_check_errorcopy().
361 PH/23 POSIX allows open() to be a macro; guard against that.
363 PH/24 If the recipient of an error message contained an @ in the local part
364 (suitably quoted, of course), incorrect values were put in $domain and
365 $local_part during the evaluation of errors_copy.
371 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
372 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
375 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
376 issue a MAIL command.
378 PH/02 In an ACL statement such as
380 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
382 if a client was not listed at all, or was listed with a value other than
383 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
384 the condition was not true (as it should be), so access was not denied.
385 The bug was that the ! inversion was incorrectly passed on to the second
386 item. This has been fixed.
388 PH/03 Added additional dnslists conditions == and =& which are different from
389 = and & when the dns lookup returns more than one IP address.
391 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
392 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
394 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
395 FSYNC, which compiles an option called disable_fsync that allows for
396 bypassing fsync(). The documentation is heavily laced with warnings.
398 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
400 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
401 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
402 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
403 including adding "make clean"; (3) Added -fPIC when compiling the test
404 dynamically loaded module, to get rid of a warning.
406 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
407 message fails, move_frozen_messages = true and ignore_bounce_errors_after
408 = 0s. The bug is otherwise harmless.
410 PH/07 There was a bug in the dovecot authenticator such that the value of
411 $auth1 could be overwritten, and so not correctly preserved, after a
412 successful authentication. This usually meant that the value preserved by
413 the server_setid option was incorrect.
415 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
417 PH/09 Installed PCRE release 7.0.
419 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
420 run for batched SMTP input. It is now run at the start of every message
421 in the batch. While fixing this I discovered that the process information
422 (output by running exiwhat) was not always getting set for -bs and -bS
423 input. This is fixed, and it now also says "batched" for BSMTP.
425 PH/11 Added control=no_pipelining.
427 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
428 patch, slightly modified), and move the expansion of helo_data till after
429 the connection is made in the smtp transport (so it can use these
432 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
434 PH/14 Added log_selector = +pid.
436 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
438 PH/16 Add ${if forany and ${if forall.
440 PH/17 Added dsn_from option to vary the From: line in DSNs.
442 PH/18 Flush SMTP output before performing a callout, unless control =
443 no_callout_flush is set.
445 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
446 was true (the default) a successful delivery failed to delete the retry
447 item, thus causing premature timeout of the address. The bug is now
450 PH/20 Added hosts_avoid_pipelining to the smtp transport.
452 PH/21 Long custom messages for fakedefer and fakereject are now split up
453 into multiline reponses in the same way that messages for "deny" and
454 other ACL rejections are.
456 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
457 with slight modification.
459 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
460 draft, changing the syntax and factoring some duplicate code".
462 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
463 for deliveries of the second and subsequent messages over the same SMTP
466 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
467 ${reduce, with only minor "tidies".
469 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
471 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
472 expansion side effects.
474 PH/27 When a message times out after an over-quota error from an Exim-imposed
475 quota, the bounce message says "mailbox is full". This message was not
476 being given when it was a system quota that was exceeded. It now should
479 MH/03 Made $recipients available in local_scan(). local_scan() already has
480 better access to the recipient list through recipients_list[], but
481 $recipients can be useful in postmaster-provided expansion strings.
483 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
484 in the case of a MAIL command with additional options following the
485 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
486 were accidentally chopped off.
488 PH/29 SMTP synchronization checks are implemented when a command is read -
489 there is a check that no more input is waiting when there shouldn't be
490 any. However, for some commands, a delay in an ACL can mean that it is
491 some time before the response is written. In this time, more input might
492 arrive, invalidly. So now there are extra checks after an ACL has run for
493 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
494 pipelining has not been advertised.
496 PH/30 MH's patch to allow iscntrl() characters to be list separators.
498 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
499 returned in the SMTP response when smtp_return_error_details was false.
502 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
503 instead of the C I/O that was originally supplied, because problems were
506 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
507 Exim which did not show up earlier: it was assuming that a call to
508 SSL_CTX_set_info_callback() might give an error value. In fact, there is
509 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
510 was a macro that became an assignment, so it seemed to work. This has
511 changed to a proper function call with a void return, hence the compile
512 error. Exim's code has been fixed.
514 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
517 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
519 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
521 PH/37 If a message is not accepted after it has had an id assigned (e.g.
522 because it turns out to be too big or there is a timeout) there is no
523 "Completed" line in the log. When some messages of this type were
524 selected by exigrep, they were listed as "not completed". Others were
525 picked up by some special patterns. I have improved the selection
526 criteria to be more general.
528 PH/38 The host_find_failed option in the manualroute router can now be set
529 to "ignore", to completely ignore a host whose IP address cannot be
530 found. If all hosts are ignored, the behaviour is controlled by the new
531 host_all_ignored option.
533 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
534 homing or because of multiple MX records with /mx) generated more than
535 one IP address, and the following item turned out to be the local host,
536 all the secondary addresses of the first item were incorrectly removed
537 from the list, along with the local host and any following hosts (which
538 is what is supposed to happen).
540 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
541 whoever called Exim into the -H file. In the case of the daemon it was
542 behaving confusingly. When first started, it used values for whoever
543 started the daemon, but after a SIGHUP it used the Exim user (because it
544 calls itself on a restart). I have changed the code so that it now always
547 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
548 message are rejected with the same error (e.g. no authentication or bad
549 sender address), and a DATA command is nevertheless sent (as can happen
550 with PIPELINING or a stupid MUA), the error message that was given to the
551 RCPT commands is included in the rejection of the DATA command. This is
552 intended to be helpful for MUAs that show only the final error to their
555 PH/42 Another patch from the Sieve maintainer.
557 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
558 Eximstats - Fixed some broken HTML links and added missing column headers
560 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
561 columns for Rejects, Temp Rejects, Ham, and Spam rows.
563 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
565 PH/43 Yet another patch from the Sieve maintainer.
567 PH/44 I found a way to check for a TCP/IP connection going away before sending
568 the response to the final '.' that terminates a message, but only in the
569 case where the client has not sent further data following the '.'
570 (unfortunately, this is allowed). However, in many cases there won't be
571 any further data because there won't be any more messages to send. A call
572 to select() can be used: if it shows that the input is "ready", there is
573 either input waiting, or the socket has been closed. An attempt to read
574 the next input character can distinguish the two cases. Previously, Exim
575 would have sent an OK response which the client would never have see.
576 This could lead to message repetition. This fix should cure that, at
577 least in a lot of common cases.
579 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
580 advertised in response to EHLO.
586 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
587 fixed by 4.65/MH/01 (is this a record?) are fixed:
589 (i) An empty string was always treated as zero by the numeric comparison
590 operators. This behaviour has been restored.
592 (ii) It is documented that the numeric comparison operators always treat
593 their arguments as decimal numbers. This was broken in that numbers
594 starting with 0 were being interpreted as octal.
596 While fixing these problems I realized that there was another issue that
597 hadn't been noticed. Values of message_size_limit (both the global option
598 and the transport option) were treated as octal if they started with 0.
599 The documentation was vague. These values are now always treated as
600 decimal, and I will make that clear in the documentation.
606 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
607 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
610 MH/01 Don't check that the operands of numeric comparison operators are
611 integers when their expansion is in "skipping" mode (fixes bug
612 introduced by 4.64-PH/07).
614 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
615 child addresses, Exim now panics and dies. Previously, because the count
616 is held in a short int, deliveries were likely to be lost. As such a
617 large number of recipients for a single message is ridiculous
618 (performance will be very, very poor), I have chosen to impose a limit
619 rather than extend the field.
625 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
626 leftover -K file (the existence of which was triggered by #402).
627 While we were at it, introduced process PID as part of the -K
628 filename. This should rule out race conditions when creating
631 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
632 processing considerably. Previous code took too long for large mails,
633 triggering a timeout which in turn triggers #401.
635 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
636 in the DK code in transports.c. sendfile() is not really portable,
637 hence the _LINUX specificness.
639 TF/01 In the add_headers option to the mail command in an Exim filter,
640 there was a bug that Exim would claim a syntax error in any
641 header after the first one which had an odd number of characters
644 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
645 callout verification, Exim cached a "reject" for the entire domain. This
646 is correct for most verifications, but it is not correct for a recipient
647 verification with use_sender or use_postmaster set, because in that case
648 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
649 case of MAIL FROM:<> rejection from other early rejections (e.g.
650 rejection of HELO). When verifying a recipient using a non-null MAIL
651 address, the cache is ignored if it shows MAIL FROM:<> rejection.
652 Whatever the result of the callout, the value of the domain cache is
653 left unchanged (for any other kind of callout, getting as far as trying
654 RCPT means that the domain itself is ok).
656 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
659 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
660 manifest itself as EPIPE rather than ECONNECT. When tidying away a
661 session, the daemon ignores ECONNECT errors and logs others; it now
662 ignores EPIPE as well.
664 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
665 (quoted-printable decoding).
667 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
668 later the small subsequent patch to fix an introduced bug.
670 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
672 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
674 PH/08 An error is now given if message_size_limit is specified negative.
676 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
677 to be given (somewhat) arbitrary names.
679 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
682 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
683 miscellaneous code fixes
685 PH/10 Added the log_reject_target ACL modifier to specify where to log
688 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
689 hostname. This is wrong, because it relates to the incoming message (and
690 probably the interface on which it is arriving) and not to the outgoing
691 callout (which could be using a different interface). This has been
692 changed to use the value of the helo_data option from the smtp transport
693 instead - this is what is used when a message is actually being sent. If
694 there is no remote transport (possible with a router that sets up host
695 addresses), $smtp_active_hostname is used.
697 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
698 tweaks were necessary in order to get it to work (see also 21 below):
699 (a) The code assumed that strncpy() returns a negative number on buffer
700 overflow, which isn't the case. Replaced with Exim's string_format()
702 (b) There were several signed/unsigned issues. I just did the minimum
703 hacking in of casts. There is scope for a larger refactoring.
704 (c) The code used strcasecmp() which is not a standard C function.
705 Replaced with Exim's strcmpic() function.
706 (d) The code set only $1; it now sets $auth1 as well.
707 (e) A simple test gave the error "authentication client didn't specify
708 service in request". It would seem that Dovecot has changed its
709 interface. Fortunately there's a specification; I followed it and
710 changed what the client sends and it appears to be working now.
712 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
715 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
716 address A is aliased to B and C, where B exists and C does not. Without
717 -v the output is "A verified" because verification stops after a
718 successful redirection if more than one address is generated. However,
719 with -v the child addresses are also verified. Exim was outputting "A
720 failed to verify" and then showing the successful verification for C,
721 with its parentage. It now outputs "B failed to verify", showing B's
722 parentage before showing the successful verification of C.
724 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
725 look up a TXT record in a specific list after matching in a combined
728 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
729 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
730 they consult the DNS. I had assumed they would set it the way they
731 wanted; and indeed my experiments on Linux seem to show that in some
732 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
733 To be on the safe side, however, I have now made the interface to
734 host_find_byname() similar to host_find_bydns(), with an argument
735 containing the DNS resolver options. The host_find_byname() function now
736 sets these options at its start, just as host_find_bydns() does. The smtp
737 transport options dns_qualify_single and dns_search_parents are passed to
738 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
739 of host_find_byname() use the default settings of RES_DEFNAMES
740 (qualify_single) but not RES_DNSRCH (search_parents).
742 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
743 spool_read_header() do less string testing, by means of a preliminary
744 switch on the second character of optional "-foo" lines. (This is
745 overdue, caused by the large number of possibilities that now exist.
746 Originally there were few.) While I was there, I also converted the
747 str(n)cmp tests so they don't re-test the leading "-" and the first
748 character, in the hope this might squeeze out yet more improvement.
750 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
751 flag allowing group syntax was set by the header_syntax check but not
752 turned off, possible causing trouble later; (2) The flag was not being
753 set at all for the header_verify test, causing "group"-style headers to
754 be rejected. I have now set it in this case, and also caused header_
755 verify to ignore an empty address taken from a group. While doing this, I
756 came across some other cases where the code for allowing group syntax
757 while scanning a header line wasn't quite right (mostly, not resetting
758 the flag correctly in the right place). These bugs could have caused
759 trouble for malformed header lines. I hope it is now all correct.
761 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
762 with the "reply" argument non-NULL. The code, however (which originally
763 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
764 but it didn't always do it. This confused somebody who was copying the
765 code for some other use. I have removed all the tests.
767 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
768 feature that was used to support insecure browsers during the U.S. crypto
769 embargo. It requires special client support, and Exim is probably the
770 only MTA that supported it -- and would never use it because real RSA is
771 always available. This code has been removed, because it had the bad
772 effect of slowing Exim down by computing (never used) parameters for the
773 RSA_EXPORT functionality.
775 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
776 authenticator to fail if there's a tab character in the incoming data
777 (there should never be unless someone is messing about, as it's supposed
778 to be base64-encoded). Also added, on Timo's advice, the "secured" option
779 if the connection is using TLS or if the remote IP is the same as the
780 local IP, and the "valid-client-cert option" if a client certificate has
783 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
784 authenticators. This can be used for authorization after authentication
785 succeeds. (In the case of plaintext, it servers for both authentication
788 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
789 if any retry times were supplied.
791 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
792 connection, where there is no client IP address to check. In this
793 situation, the verify now always succeeds.
795 PH/25 Applied John Jetmore's -Mset patch.
797 PH/26 Added -bem to be like -Mset, but loading a message from a file.
799 PH/27 In a string expansion for a processed (not raw) header when multiple
800 headers of the same name were present, leading whitespace was being
801 removed from all of them, but trailing whitespace was being removed only
802 from the last one. Now trailing whitespace is removed from each header
803 before concatenation. Completely empty headers in a concatenation (as
806 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
807 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
809 PH/29 [Removed. This was a change that I later backed out, and forgot to
810 correct the ChangeLog entry (that I had efficiently created) before
811 committing the later change.]
813 PH/30 Exim was sometimes attempting to deliver messages that had suffered
814 address errors (4xx response to RCPT) over the same connection as other
815 messages routed to the same hosts. Such deliveries are always "forced",
816 so retry times are not inspected. This resulted in far too many retries
817 for the affected addresses. The effect occurred only when there were more
818 hosts than the hosts_max_try setting in the smtp transport when it had
819 the 4xx errors. Those hosts that it had tried were not added to the list
820 of hosts for which the message was waiting, so if all were tried, there
821 was no problem. Two fixes have been applied:
823 (i) If there are any address or message errors in an SMTP delivery, none
824 of the hosts (tried or untried) are now added to the list of hosts
825 for which the message is waiting, so the message should not be a
826 candidate for sending over the same connection that was used for a
827 successful delivery of some other message. This seems entirely
828 reasonable: after all the message is NOT "waiting for some host".
829 This is so "obvious" that I'm not sure why it wasn't done
830 previously. Hope I haven't missed anything, but it can't do any
831 harm, as the worst effect is to miss an optimization.
833 (ii) If, despite (i), such a delivery is accidentally attempted, the
834 routing retry time is respected, so at least it doesn't keep
835 hammering the server.
837 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
838 in ${readsocket because some servers need this prod.
840 PH/32 Added some extra debug output when updating a wait-xxx database.
842 PH/33 The hint "could be header name not terminated by colon", which has been
843 given for certain expansion errors for a long time, was not being given
844 for the ${if def:h_colon_omitted{... case.
846 PH/34 The spec says: "With one important exception, whenever a domain list is
847 being scanned, $domain contains the subject domain." There was at least
848 one case where this was not true.
850 PH/35 The error "getsockname() failed: connection reset by peer" was being
851 written to the panic log as well as the main log, but it isn't really
852 panic-worthy as it just means the connection died rather early on. I have
853 removed the panic log writing for the ECONNRESET error when getsockname()
856 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
857 runs only) independently of the message's sender address. This meant
858 that, if the 4xx error was in fact related to the sender, a different
859 message to the same recipient with a different sender could confuse
860 things. In particualar, this can happen when sending to a greylisting
861 server, but other circumstances could also provoke similar problems.
862 I have changed the default so that the retry time for these errors is now
863 based a combination of the sender and recipient addresses. This change
864 can be overridden by setting address_retry_include_sender=false in the
867 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
868 remote server are returned as part of bounce messages. This was not
869 happening for LMTP over a pipe (the lmtp transport), but now it is the
870 same for both kinds of LMTP.
872 PH/38 Despite being documented as not happening, Exim was rewriting addresses
873 in header lines that were in fact CNAMEs. This is no longer the case.
875 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
876 and queue runs started by the daemon processed all messages. This has
877 been fixed so that -R and -S can now usefully be given with -q<time>.
879 PH/40 Import PCRE release 6.7 (fixes some bugs).
881 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
883 PH/42 Give an error if -q is specified more than once.
885 PH/43 Renamed the variables $interface_address and $interface_port as
886 $received_ip_address and $received_port, to make it clear that these
887 values apply to message reception, and not to the outgoing interface when
888 a message is delivered. (The old names remain recognized, of course.)
890 PH/44 There was no timeout on the connect() call when using a Unix domain
891 socket in the ${readsocket expansion. There now is.
893 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
894 be meaningful with "accept".
896 SC/01 Eximstats V1.43
897 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
899 SC/02 Eximstats V1.44
900 Use a glob alias rather than an array ref in the generated
901 parser. This improves both readability and performance.
903 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
904 Collect SpamAssassin and rejection statistics.
905 Don't display local sender or destination tables unless
906 there is data to show.
907 Added average volumes into the top table text output.
909 SC/04 Eximstats V1.46
910 Collect data on the number of addresses (recipients)
911 as well as the number of messages.
913 SC/05 Eximstats V1.47
914 Added 'Message too big' to the list of mail rejection
915 reasons (thanks to Marco Gaiarin).
917 SC/06 Eximstats V1.48
918 Mainlog lines which have GMT offsets and are too short to
919 have a flag are now skipped.
921 SC/07 Eximstats V1.49 (Alain Williams)
922 Added the -emptyok flag.
924 SC/08 Eximstats V1.50
925 Fixes for obtaining the IP address from reject messages.
927 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
928 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
929 whitesspace changes from 4.64-PH/27
931 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
934 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
935 are found, allow negative numbers in numeric criteria)
937 JJ/06 exipick.20061117.2, added new $message_body_missing variable
939 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
940 to match changes made in 4.64-PH/43
942 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
944 PH/47 Put in an explicit test for a DNS lookup of an address record where the
945 "domain" is actually an IP address, and force a failure. This locks out
946 those revolvers/nameservers that support "A-for-A" lookups, in
947 contravention of the specifications.
949 PH/48 When a host name was looked up from an IP address, and the subsequent
950 forward lookup of the name timed out, the host name was left in
951 $sender_host_name, contrary to the specification.
953 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
954 restricted to single-key lookups, Exim was not diagnosing an error if
955 * or *@ was used with a query-style lookup.
957 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
959 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
960 long ago, but noone interested enough thought of it. Let's just say that
961 the "1.1" means that there are some new functions that weren't there at
962 some point in the past.
964 PH/51 Error processing for expansion failure of helo_data from an smtp
965 transport during callout processing was broken.
967 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
968 tested/used via the -bh/-bhc/-bs options.
970 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
971 bug, fixed in subsequent PCRE releases).
973 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
974 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
976 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
982 SC/01 Use a glob alias rather than an array ref in eximstats generated
983 parser. This improves both readability and performance.
985 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
986 Don't display local sender or destination tables in eximstats unless
987 there is data to show.
988 Added average volumes into the eximstats top table text output.
990 SC/03 Collect data on the number of addresses (recipients) as well
991 as the number of messages in eximstats.
993 TF/01 Correct an error in the documentation for the redirect router. Exim
994 does (usually) call initgroups() when daemonizing.
996 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
997 with consistent privilege compared to when running as a daemon.
999 TF/03 Note in the spec that $authenticated_id is not set for local
1000 submissions from trusted users.
1002 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1003 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1005 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1006 by adding some example configuration directives to the default
1007 configuration file. A little bit of work is required to uncomment the
1008 directives and define how usernames and passwords are checked, but
1009 there is now a framework to start from.
1011 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1012 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1013 without this. I don't know how relevant this is to other LDAP libraries.
1015 PH/02 Add the verb name to the "unknown ACL verb" error.
1017 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1019 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1021 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1022 directory not expanded when it should be if an expanded home directory
1023 was set for the address (which is overridden by the transport).
1025 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1028 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1029 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1030 because it is too late at that time, and has no effect.
1032 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1033 security issue with \' (bugzilla #107). I could not use the
1034 PQescapeStringConn() function, because it needs a PGconn value as one of
1037 PH/08 When testing addresses using -bt, indicate those final addresses that
1038 are duplicates that would not cause an additional delivery. At least one
1039 person was confused, thinking that -bt output corresponded to deliveries.
1040 (Suppressing duplicates isn't a good idea as you lose the information
1041 about possibly different redirections that led to the duplicates.)
1043 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1044 systems where poll() doesn't work, in particular OS X.
1046 PH/10 Added more information to debugging output for retry time not reached.
1048 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1049 operations in malware.c.
1051 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1054 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1055 syslog_duplication set false, log lines that would normally be written
1056 both the the main log and to the reject log were not written to syslog at
1059 PH/14 In the default configuration, change the use of "message" in ACL warn
1060 statements to "add_header".
1062 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1063 not followed by a command (e.g. "seen endif").
1065 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1066 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1069 PH/17 Added extra conditions to the default value of delay_warning_condition
1073 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1074 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1075 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1078 The Auto-Submitted: and various List- headers are standardised, whereas I
1079 don't think Precedence: ever was.
1081 PH/18 Refactored debugging code in route_finduser() to show more information,
1082 in particular, the error code if getpwnam() issues one.
1084 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1085 This is apparently needed in addition to the PH/07 change above to avoid
1086 any possible encoding problems.
1088 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1089 but not after initializing Perl.
1091 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1092 output them only if debugging. By default they are written stderr,
1093 apparently, which is not desirable.
1095 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1098 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1101 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1103 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1104 authenticated or an ident call has been made. Suppress the default
1105 values for $authenticated_id and $authenticated_sender (but permit -oMai
1106 and -oMas) when testing with -bh.
1108 PH/24 Re-jigged the order of the tests in the default configuration so that the
1109 tests for valid domains and recipients precede the DNS black list and CSA
1110 tests, on the grounds that those ones are more expensive.
1112 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1113 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1114 This bug exists in every version of Exim that I still have, right back to
1117 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1118 However, an attempt to turn on case-sensitivity in a regex key by
1119 including (?-i) didn't work because the subject string was already
1120 lowercased, and the effects were non-intuitive. It turns out that a
1121 one-line patch can be used to allow (?-i) to work as expected.
1127 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1128 other effects) broke the use of negated acl sub-conditions.
1130 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1133 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1134 "Deny" causes Exim to reject the incoming connection with a 554 error.
1135 Unfortunately, if there is a major crisis, such as a disk failure,
1136 tcp-wrappers gives "deny", whereas what one would like would be some
1137 kind of temporary error. A kludge has been added to help with this.
1138 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1139 554 error is used if errno is still zero or contains ENOENT (which occurs
1140 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1143 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1145 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1146 errors. Otherwise a message that provokes a temporary error (when other
1147 messages do not) can cause a whole host to time out.
1149 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1150 addresses were routed directly to files or pipes from a redirect router.
1151 File deliveries just didn't batch; pipe deliveries might have suffered
1154 PH/06 A failure to get a lock for a hints database would erroneously always say
1155 "Failed to get write lock", even when it was really a read lock.
1157 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1158 of 0600. This has been changed to use the value of the lockfile_mode
1159 option (which defaults to 0600).
1161 PH/08 Applied small patch from the Sieve maintainer.
1163 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1164 folder from quota calculations, a direct delivery into this folder messed
1165 up the contents of the maildirsize file. This was because the regex was
1166 used only to exclude .Trash (or whatever) when the size of the mailbox
1167 was calculated. There was no check that a delivery was happening into an
1168 excluded directory. This bug has been fixed by ignoring all quota
1169 processing for deliveries into excluded directories.
1171 PH/10 Added the maildirfolder_create_regex option to appendfile.
1177 PH/01 The code for finding all the local interface addresses on a FreeBSD
1178 system running IPv6 was broken. This may well have applied to all BSD
1179 systems, as well as to others that have similar system calls. The broken
1180 code found IPv4 interfaces correctly, but gave incorrect values for the
1181 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1182 that it would not match correctly against @[] and not recognize the IPv6
1185 PH/02 The ipliteral router was not recognizing addresses of the form user@
1186 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1188 PH/03 Added disable_ipv6.
1190 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1191 decoded form, because it is most often used to construct To: headers
1192 lines in autoreplies, and the decoded form may well be syntactically
1193 invalid. However, $reply_address has leading white space removed, and all
1194 newlines turned into spaces so that the autoreply transport does not
1197 PH/05 If group was specified without a user on a router, and no group or user
1198 was specified on a transport, the group from the router was ignored.
1200 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1201 for visible compile-time settings that can be used to change these
1202 numbers, for those that want even more. Backwards compatibility with old
1203 spool files has been maintained. However, going back to a previous Exim
1204 release will lost any variables that are in spool files.
1206 PH/07 Two small changes when running in the test harness: increase delay when
1207 passing a TCP/IP connection to a new process, in case the original
1208 process has to generate a bounce, and remove special handling of
1209 127.0.0.2 (sic), which is no longer necessary.
1211 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1212 be the same on different OS.
1214 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1217 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1218 whether --show-vars was specified or not
1220 JJ/02 exipick: Added support for new ACL variable spool format introduced
1223 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1224 syntactically invalid From: or Reply-to: line, and a filter used this to
1225 generate an autoreply, and therefore failed to obtain an address for the
1226 autoreply, Exim could try to deliver to a non-existent relative file
1227 name, causing unrelated and misleading errors. What now happens is that
1228 it logs this as a hard delivery error, but does not attempt to create a
1231 PH/11 The exinext utility has a -C option for testing purposes, but although
1232 the given file was scanned by exinext itself; it wasn't being passed on
1233 when Exim was called.
1235 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1236 an end-of-file indication when reading a command response.
1238 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1239 compiled. In many other places in Exim, IPv6 addresses are always
1240 recognized, so I have changed this. It also means that IPv4 domain
1241 literals of the form [IPV4:n.n.n.n] are now always recognized.
1243 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1244 used if the router is not running as root, for example, when verifying at
1245 ACL time, or when using -bh. The debugging output from this situation was
1246 non-existent - all you got was a failure to exec. I have made two
1249 (a) Failures to set uid/gid, the current directory, or a process leader
1250 in a subprocess such as that created by queryprogram now generate
1251 suitable debugging ouput when -d is set.
1253 (b) The queryprogram router detects when it is not running as root,
1254 outputs suitable debugging information if -d is set, and then runs
1255 the subprocess without attempting to change uid/gid.
1257 PH/15 Minor change to Makefile for building test_host (undocumented testing
1260 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1261 additional section of a DNS packet that returns MX or SRV records.
1262 Instead, it always explicitly searches for A/AAAA records. This avoids
1263 major problems that occur when a DNS server includes only records of one
1264 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1265 fixed another bug: if SRV records were looked up and the corresponding
1266 address records were *not* found in the additional section, the port
1267 values from the SRV records were lost.
1269 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1270 using the correct key (the original address) when searching the retry
1271 rules in order to find which one to use for generating the retry hint.
1273 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1274 adding the default one. Similarly, if it contains a Reply-To: header, the
1275 errors_reply_to option, if set, is not used.
1277 PH/19 When calculating a retry time, Exim used to measure the "time since
1278 failure" by looking at the "first failed" field in the retry record. Now
1279 it does not use this if it is later than than the arrival time of the
1280 message. Instead it uses the arrival time. This makes for better
1281 behaviour in cases where some deliveries succeed, thus re-setting the
1282 "first failed" field. An example is a quota failure for a huge message
1283 when small messages continue to be delivered. Without this change, the
1284 "time since failure" will always be short, possible causing more frequent
1285 delivery attempts for the huge message than are intended.
1286 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1288 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1289 $1, $2, $3) because the numerical variables can be reset during some
1290 expansion items (e.g. "match"), thereby losing the authentication data.
1292 PH/21 Make -bV show the size of off_t variables so that the test suite can
1293 decide whether to run tests for quotas > 2G.
1295 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1296 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1297 filecount value is greater than 2G or if a quota value is greater than 2G
1298 on a system where the size of off_t is not greater than 4, a panic error
1301 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1302 never match. The debug and -bh output now contains an explicit error
1303 message indicating a malformed IPv4 address or mask.
1305 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1306 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1307 PH/23 above applies.
1309 PH/25 Do not write to syslog when running in the test harness. The only
1310 occasion when this arises is a failure to open the main or panic logs
1311 (for which there is an explicit test).
1313 PH/26 Added the /no_tell option to "control=freeze".
1315 PH/27 If a host name lookup failed very early in a connection, for example, if
1316 the IP address matched host_lookup and the reverse lookup yielded a name
1317 that did not have a forward lookup, an error message of the form "no IP
1318 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1319 could be logged. Now it outputs the IP address instead of "NULL".
1321 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1322 allows the sender and the authenticated sender to be set when
1323 submitting a message from within Exim. Since child_open_exim() is
1324 documented for local_scan(), the new function should be too.
1326 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1327 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1328 results in an empty string is now treated as unset.
1330 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1332 PH/31 Added sender_verify_fail logging option.
1334 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1335 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1336 tidied the source and removed it altogether.
1338 PH/33 When a queue run was abandoned because the load average was too high, a
1339 log line was always written; now it is written only if the queue_run log
1340 selector is set. In addition, the log line for abandonment now contains
1341 information about the queue run such as the pid. This is always present
1342 in "start" and "stop" lines but was omitted from the "abandon" line.
1344 PH/34 Omit spaces between a header name and the colon in the error message that
1345 is given when verify = headers_syntax fails (if there are lots of them,
1346 the message gets confusing).
1348 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1349 names, as there are now some PTR records that contain slashes. This check
1350 is only to protect against broken name servers that fall over on strange
1351 characters, so the fact that it applies to all lookups doesn't matter.
1353 PH/36 Now that the new test suite is complete, we can remove some of the
1354 special code in Exim that was needed for the old test suite. For example,
1355 sorting DNS records because real resolvers return them in an arbitrary
1356 order. The new test suite's fake resolver always returns records in the
1359 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1360 bounces) except when queue_only is set, to avoid logging races between
1361 the different processes.
1363 PH/38 Panic-die if .include specifies a non-absolute path.
1365 PH/39 A tweak to the "H" retry rule from its user.
1367 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1368 a label. They prevented compilation on older perls.
1370 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1371 a warning to be raised on newish perls.
1373 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1374 on queue. Changes to match documented behaviour of showing count of
1375 messages matching specified criteria.
1377 PH/40 Changed the default ident timeout from 30s to 5s.
1379 PH/41 Added support for the use of login_cap features, on those BSD systems
1380 that have them, for controlling the resources used by pipe deliveries.
1382 PH/42 The content-scanning code uses fopen() to create files in which to put
1383 message data. Previously it was not paying any attention to the mode of
1384 the files. Exim runs with umask(0) because the rest of the code creates
1385 files with open(), and sets the required mode explicitly. Thus, these
1386 files were ending up world-writeable. This was not a big issue, because,
1387 being within the spool directory, they were not world-accessible. I have
1388 created a function called modefopen, which takes an additional mode
1389 argument. It sets umask(777), creates the file, chmods it to the required
1390 mode, then resets the umask. All the relevant calls to fopen() in the
1391 content scanning code have been changed to use this function.
1393 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1394 to 24 hours. This avoids potential overflow problems when processing G
1395 and H retry rules. I suspect nobody ever tinkers with this value.
1397 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1399 PH/45 When the plaintext authenticator is running as a client, the server's
1400 challenges are checked to ensure they are valid base64 strings. By
1401 default, the authentication attempt is cancelled if an invalid string is
1402 received. Setting client_ignore_invalid_base64 true ignores these errors.
1403 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1404 they are received. Thus, the responses can be made to depend on the
1405 challenges. If an invalid string is ignored, an empty string is placed in
1408 PH/46 Messages that are created by the autoreply transport now contains a
1409 References: header, in accordance with RFCs 2822 and 3834.
1411 PH/47 Added authenticated_sender_force to the smtp transport.
1413 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1415 PH/49 Installed latest patch from the Sieve maintainer.
1417 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1418 was also set, the appendfile transport was unnecessarily scanning a
1419 directory of message files (e.g. for maildir delivery) to find the count
1420 of files (along with the size), even though it did not need this
1421 information. It now does the scan only if it needs to find either the
1422 size of the count of files.
1424 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1426 PH/52 Two bugs concerned with error handling when the smtp transport is
1429 (i) Exim was not creating retry information for temporary errors given
1430 for individual recipients after the DATA command when the smtp transport
1431 was used in LMTP mode. This meant that they could be retried too
1432 frequently, and not timed out correctly.
1434 (ii) Exim was setting the flag that allows error details to be returned
1435 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1436 recipients that were returned after the DATA command.
1438 PH/53 This is related to PH/52, but is more general: for any failing address,
1439 when detailed error information was permitted to be returned to the
1440 sender, but the error was temporary, then after the final timeout, only
1441 "retry timeout exceeded" was returned. Now it returns the full error as
1442 well as "retry timeout exceeded".
1444 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1445 do this, and (what is worse) MTAs that accept it.
1447 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1448 will now be deprecated.
1450 PH/56 New os.c-cygwin from the Cygwin maintainer.
1452 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1453 formats (previously only available in exim formats via -bpr, -bpru,
1454 and -bpra. Now also available in native and exiqgrep formats)
1456 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1457 with very large, slow to parse queues
1459 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1461 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1463 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1464 responses to authentication challenges, though it was showing the
1465 challenges; (ii) I've removed the CR characters from the debug output for
1468 PH/58 Allow for the insertion of a newline as well as a space when a string
1469 is turned into more than one encoded-word during RFC 2047 encoding. The
1470 Sieve code now uses this.
1472 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1473 data_4xx, lost_connection, tls_required.
1475 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1476 message was being sent as an SMTP response.
1478 PH/61 Add -l and -k options to exicyclog.
1480 PH/62 When verifying, if an address was redirected to one new address, so that
1481 verification continued, and the new address failed or deferred after
1482 having set something in $address_data, the value of $address_data was not
1483 passed back to the ACL. This was different to the case when no
1484 redirection occurred. The value is now passed back in both cases.
1486 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1487 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1488 use login_cap.h, so on its own it isn't the distinguishing feature. The
1489 new name refers directly to the setclassresources() function.
1491 PH/65 Added configuration files for NetBSD3.
1493 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1495 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1496 is preferred over IPv4.
1498 PH/68 The bounce_return_message and bounce_return_body options were not being
1499 honoured for bounces generated during the reception of non-SMTP messages.
1500 In particular, this applied to messages rejected by the ACL. This bug has
1501 been fixed. However, if bounce_return_message is true and bounce_return_
1502 body is false, the headers that are returned for a non-SMTP message
1503 include only those that have been read before the error was detected.
1504 (In the case of an ACL rejection, they have all been read.)
1506 PH/69 The HTML version of the specification is now built in a directory called
1507 spec_html instead of spec.html, because the latter looks like a path with
1508 a MIME-type, and this confuses some software.
1510 PH/70 Catch two compiler warnings in sieve.c.
1512 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1513 function verify_get_ident() calls ip_connect() to connect a socket, but
1514 if the "connect()" function timed out, ip_connect() used to close the
1515 socket. However, verify_get_ident() also closes the socket later, and in
1516 between Exim writes to the log, which may get opened at this point. When
1517 the socket was closed in ip_connect(), the log could get the same file
1518 descriptor number as the socket. This naturally causes chaos. The fix is
1519 not to close the socket in ip_connect(); the socket should be closed by
1520 the function that creates it. There was only one place in the code where
1521 this was missing, in the iplookup router, which I don't think anybody now
1522 uses, but I've fixed it anyway.
1524 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1525 well as to direct DNS lookups. Otherwise the handling of names in host
1526 lists is inconsistent and therefore confusing.
1532 PH/01 Two changes to the default runtime configuration:
1534 (1) Move the checks for relay_from_hosts and authenticated clients from
1535 after to before the (commented out) DNS black list checks.
1537 (2) Add control=submission to the relay_from_hosts and authenticated
1538 clients checks, on the grounds that messages accepted by these
1539 statements are most likely to be submissions.
1541 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1543 (1) Generate an error if the third argument for the ${prvs expansion is
1546 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1549 (3) Reset the variables that are obtained from the first argument of
1550 ${prvscheck and used in the second argument before leaving the code,
1551 because their memory is reclaimed, so using them afterwards may do
1554 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1555 one (it's much easier than Tom thought :-).
1557 (5) Because of (4), we can now allow for the use of $prvscheck_result
1558 inside the third argument.
1560 PH/03 For some reason, the default setting of PATH when running a command from
1561 a pipe transport was just "/usr/bin". I have changed it to
1564 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1565 anything to be listed in the output from -bV.
1567 PH/05 When a filter generated an autoreply, the entire To: header line was
1568 quoted in the delivery log line, like this:
1570 => >A.N.Other <ano@some.domain> <original@ddress> ...
1572 This has been changed so that it extracts the operative address. There
1573 may be more than one such address. If so, they are comma-separated, like
1576 => >ano@some.domain,ona@other.domain <original@ddress> ...
1578 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1579 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1580 not being looked up in the rDNS to get a host name, Exim was showing the
1581 IP address twice in Received: lines, even though the IP addresses were
1582 identical. For example:
1584 Received: from [1.2.3.4] (helo=[1.2.3.4])
1586 However, if the real host name was known, it was omitting the HELO data
1587 if it matched the actual IP address. This has been tidied up so that it
1588 doesn't show the same IP address twice.
1590 PH/07 When both +timestamp and +memory debugging was on, the value given by
1591 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1592 called by the debug printing, thereby overwriting the timestamp buffer.
1593 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1595 PH/08 When the original message was included in an autoreply transport, it
1596 always said "this is a copy of the message, including all the headers",
1597 even if body_only or headers_only was set. It now gives an appropriate
1600 PH/09 Applied a patch from the Sieve maintainer which:
1602 o fixes some comments
1603 o adds the (disabled) notify extension core
1604 o adds some debug output for the result of if/elsif tests
1605 o points to the current vacation draft in the documentation
1606 and documents the missing references header update
1610 o fixes a bug in processing the envelope test (when testing
1611 multiple envelope elements, the last element determinted the
1614 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1615 Electronic Mail") by including:
1617 Auto-submitted: auto-generated
1619 in the messages that it generates (bounce messages and others, such as
1620 warnings). In the case of bounce messages for non-SMTP mesages, there was
1621 also a typo: it was using "Auto_submitted" (underscore instead of
1622 hyphen). Since every message generated by Exim is necessarily in response
1623 to another message, thes have all been changed to:
1625 Auto-Submitted: auto-replied
1627 in accordance with these statements in the RFC:
1629 The auto-replied keyword:
1631 - SHOULD be used on messages sent in direct response to another
1632 message by an automatic process,
1634 - MUST NOT be used on manually-generated messages,
1636 - MAY be used on Delivery Status Notifications (DSNs) and Message
1637 Disposition Notifications (MDNs),
1639 - MUST NOT be used on messages generated by automatic or periodic
1640 processes, except for messages which are automatic responses to
1643 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1644 to the default Received: header definition.
1646 PH/12 Added log selector acl_warn_skipped (default on).
1648 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1649 variables because (a) they are in the wrong storage pool and (b) even if
1650 they were copied, it wouldn't work properly because of the caching.
1652 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1653 checking when decoding. Apparently there are clients that generate
1654 overlong encoded strings. Why am I not surprised?
1656 PH/15 If the first argument of "${if match_address" was not empty, but did not
1657 contain an "@" character, Exim crashed. Now it writes a panic log message
1658 and treats the condition as false.
1660 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1662 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1663 extension "envelope-auth". The code is finished and in agreement with
1664 other implementations, but there is no documentation so far and in fact,
1665 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1666 not changing the active code.
1668 Print executed "if" and "elsif" statements when debugging is used. This
1669 helps a great deal to understand what a filter does.
1671 Document more things not specified clearly in RFC3028. I had all this
1672 sorted out, when out of a sudden new issues came to my mind. Oops."
1674 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1677 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1678 canonical form (as documented). However, after a host name lookup from
1679 the IP address, check_host() was doing a simple string comparison with
1680 addresses acquired from the DNS when checking that the found name did
1681 have the original IP as one of its addresses. Since any found IPv6
1682 addresses are likely to be in abbreviated form, the comparison could
1683 fail. Luckily, there already exists a function for doing the comparison
1684 by converting both addresses to binary, so now that is used instead of
1685 the text comparison.
1687 PH/20 There was another similar case to PH/19, when a complete host name was
1688 given in a host list; looking up its IP address could give an abbreviated
1689 form, whereas the current host's name might or might not be abbreviated.
1690 The same fix has been applied.
1696 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1697 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1700 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1701 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1703 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1705 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1706 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1707 Also, for "Auto-Submitted", treat anything other than "no" as
1708 non-personal, in accordance with RFC 3834. (Previously it treated
1709 anything starting "auto-" as non-personal.)
1711 TF/01 The control=submission/name=... option had a problem with syntax
1712 errors if the name included a slash character. The /name= option
1713 now slurps the rest of the string, so it can include any characters
1714 but it must come last in the list of options (after /sender_retain
1717 PH/05 Some modifications to the interface to the fake nameserver for the new
1725 TK/01 Added the "success_on_redirect" address verification option. See
1726 NewStuff for rationale and an example.
1728 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1730 PH/02 Patch to exigrep to allow it to work on syslog lines.
1732 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1733 fread() to skip over the body file's header line, because in Cygwin the
1734 header line is locked and is inaccessible.
1736 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1737 co-exist for some time) to make it clear that it is the Exim ID that is
1738 referenced, not the Message-ID: header line.
1740 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1741 string_format() function, because snprintf() does not exist on all
1744 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1745 ${stat: expansion item.
1747 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1748 protocol synchronization error", to keep the pedants happy.
1750 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1751 well as for IRIX systems, when gcc is being used. See the host.c source
1754 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1756 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1759 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1760 transport and to the smtp transport in LMTP mode.
1762 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1764 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1765 run a filter in a subprocess. This could lead to confusion in subsequent
1766 lookups in the parent process. There should also be a search_tidyup() at
1767 the end of the subprocess.
1769 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1770 only if the host matched helo_try_verify_hosts, which caused the
1771 verification to occur when the EHLO/HELO command was issued. The ACL just
1772 tested the remembered result. Now, if a previous verification attempt has
1773 not happened, "verify = helo" does it there and then.
1775 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1777 TK/03 Fix log output including CR from clamd.
1779 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1780 exist provoked a memory error which could cause a segfault.
1782 PH/15 Installed PCRE 6.2
1784 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1786 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1787 of the problem. Specifically, suggested +O2 rather than +O1 for the
1790 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1792 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1793 record, the port was not correctly logged when the outgoing_port log
1794 selector was set (it logged the transort's default port).
1796 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1797 fallback_hosts, and "hosts" in the smtp transport.
1799 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1800 host errors such as "Connection refused".
1802 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1803 authentication with radiusclient 0.4.9:
1805 - Error returned from rc_read_config was caught wrongly
1806 - Username/password not passed on to radius server due to wrong length.
1808 The presumption is that some radiusclient API changes for 4.51/PH/17
1809 were not taken care of correctly. The code is still untested by me (my
1810 Linux distribution still has 0.3.2 of radiusclient), but it was
1811 contributed by a Radius user.
1813 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1814 expanding the "port" option of the smtp transport.
1816 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1817 while reading a MIME header. Thanks to Tom Hughes for a patch.
1819 PH/24 Include config.h inside local_scan.h so that configuration settings are
1822 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1823 that in an ACL for RCPT (for example), you can examine exactly what was
1826 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1827 commands, but it was not correctly comparing the address with the actual
1828 client host address. Thus, it would show the EHLO address in Received:
1829 header lines when this was not necessary.
1831 PH/27 Added the % operator to ${eval:}.
1833 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1834 it should be ignoring failures (because with -C, for example, it has lost
1835 privilege). It wasn't ignoring creation failures other than "already
1838 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1841 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1842 because an input line was too long, either on its own, or by virtue of
1843 too many continuations, the temporary file was not being removed, and the
1844 return code was incorrect.
1846 PH/31 Missing "BOOL" in function definition in filtertest.c.
1848 PH/32 Applied Sieve patches from the maintainer.
1850 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1852 PH/33 Added "verify = not_blind".
1854 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1855 Local/Makefile (with some defaults set). These are used in built scripts
1856 such as exicyclog, but they have never been used in the exim_install
1857 script (though there are many overriding facilities there). I have
1858 arranged that the exim_install script now takes note of these two
1861 PH/35 Installed configuration files for Dragonfly.
1863 PH/36 When a locally submitted message by a trusted user did not contain a
1864 From: header, and the sender address was obtained from -f or from an SMTP
1865 MAIL command, and the trusted user did not use -F to supply a sender
1866 name, $originator_name was incorrectly used when constructing a From:
1867 header. Furthermore, $originator_name was used for submission mode
1868 messages from external hosts without From: headers in a similar way,
1869 which is clearly wrong.
1871 PH/37 Added control=suppress_local_fixups.
1873 PH/38 When log_selector = +received_sender was set, and the addition of the
1874 sender made the log line's construction buffer exactly full, or one byte
1875 less than full, an overflow happened when the terminating "\n" was
1878 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1879 when the result of a list match is failure because a DNS lookup failed.
1881 PH/40 RM_COMMAND is now used in the building process.
1883 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1884 the "build-* directories that it finds.
1886 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1887 address in a domain literal was a prefix of an interface address.
1889 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1890 when verifying a sender address, unless rewrite_headers is false.
1892 PH/44 Wrote a long comment about why errors_to addresses are verified as
1893 recipients, not senders.
1895 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1896 the ratelimit ACL was added.
1898 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1900 PH/46 Added extra information about PostgreSQL errors to the error string.
1902 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1903 avoiding the need to install special zones in a real server. This is
1904 backwards compatible; if it can't find the fake resolver, it drops back.
1905 Thus, both old and new test suites can be run.
1907 TF/02 Added util/ratelimit.pl
1909 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1910 clock is set back in time.
1912 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1913 Candler <B.Candler@pobox.com>.
1915 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1916 OK for addresses that are the result of redirections.
1918 PH/48 A number of further additions for the benefit of the new test suite,
1919 including a fake gethostbyname() that interfaces to the fake DNS resolver
1922 TF/06 The fix for widen_domains has also been applied to qualify_single and
1923 search_parents which are the other dnslookup options that can cause
1926 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1929 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1931 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1932 service" if it encountered an MX record with an empty target hostname.
1933 The message is now "an MX or SRV record indicated no SMTP service".
1935 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1936 if the DNS of the sending site is misconfigured. This is quite a
1937 common situation. This change restores the behaviour of treating a
1938 helo verification defer as a failure.
1940 PH/51 If self=fail was set on a router, the bounce message did not include the
1941 actual error message.
1947 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1949 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1950 command itself ended in error, the underlying message about the transport
1951 filter timeout was being overwritten with the pipe command error. Now the
1952 underlying error message should be appended to the second error message.
1954 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1956 PH/02 Reduce the amount of output that "make" produces by default. Full output
1957 can still be requested.
1959 PH/03 The warning log line about a condition test deferring for a "warn" verb
1960 was being output only once per connection, rather than after each
1961 occurrence (because it was using the same function as for successful
1962 "warn" verbs). This seems wrong, so I have changed it.
1964 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1965 it should not have, which might have caused a crash in the right
1966 circumstances, but probably never did.
1968 PH/04 Installed a modified version of Tony Finch's patch to make submission
1969 mode fix the return path as well as the Sender: header line, and to
1970 add a /name= option so that you can make the user's friendly name appear
1973 TF/03 Added the control = fakedefer ACL modifier.
1975 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1976 Mark Lowes for thorough testing.
1978 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1980 TK/03 Merged latest SRS patch from Miles Wilton.
1982 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1983 with the definition in sysexits.h (which is #included earlier).
1984 Fortunately, Exim does not actually use EX_OK. The code used to try to
1985 preserve the sysexits.h value, by assumimg that macro definitions were
1986 scanned for macro replacements. I have been disabused of this notion,
1987 so now the code just undefines EX_OK before #including unistd.h.
1989 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1990 in the smtp transport. When a block could not be written in a single
1991 write() function, the timeout was being re-applied to each part-write.
1992 This seems wrong - if the receiver was accepting one byte at a time it
1993 would take for ever. The timeout is now adjusted when this happens. It
1994 doesn't have to be particularly precise.
1996 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1997 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1999 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2000 without a domain if the check to <postmaster@domain> fails.
2002 SC/01 Eximstats: added -xls and the ability to specify output files
2003 (patch written by Frank Heydlauf).
2005 SC/02 Eximstats: use FileHandles for outputing results.
2007 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2009 SC/04 Eximstats: fixed display of large numbers with -nvr option
2011 SC/05 Eximstats: fixed merging of reports with empty tables.
2013 SC/06 Eximstats: added the -include_original_destination flag
2015 SC/07 Eximstats: removed tabs and trailing whitespace.
2017 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2019 TK/06 MBOX spool code: Add real "From " MBOX separator line
2020 so the .eml file is really in mbox format (even though
2021 most programs do not really care). Patch from Alex Miller.
2023 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2024 The latter is generated from $received_to and is only set if the
2025 message has one envelope recipient. SA can use these headers,
2026 obviously out-of-the-box. Patch from Alex Miller.
2028 PH/08 The ${def test on a variable was returning false if the variable's
2029 value was "0", contrary to what the specification has always said!
2030 The result should be true unless the variable is empty.
2032 PH/09 The syntax error of a character other than { following "${if
2033 def:variable_name" (after optional whitespace) was not being diagnosed.
2034 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2035 accidental colon was present, for example, could give incorrect results.
2037 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2038 result is used (not including appendfile, where other changes are about
2041 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2042 This involved changing a lot of size variables from int to off_t. It
2043 should work with maildirs and everything.
2045 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2046 spamd dying while we are connected to it.
2048 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2051 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2052 function for BDB 4.3.
2054 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2056 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2057 the sources for PCRE have been re-arranged and more files are now
2060 PH/15 The code I had for printing potentially long long variables in PH/11
2061 above was not the best (it lost precision). The length of off_t variables
2062 is now inspected at build time, and an appropriate printing format (%ld
2063 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2064 to be "long long int" or "long int". This is needed for the internal
2065 formatting function string_vformat().
2067 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2068 the configuration file to be ":syslog", then the script "guesses" where
2069 the logs files are, rather than using the compiled in default. In our
2070 case the guess is not the same as the compiled default, so the script
2071 suddenly stopped working when I started to use syslog. The patch checks
2072 to see if log_file_path is "". If so, it attempts to read it from exim
2073 with no configuration file to get the compiled in version, before it
2074 falls back to the previous guessing code."
2076 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2077 implementing BATV in an Exim configuration. See NewStuff for the gory
2080 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2081 Makefile that are specific to HP-UX.
2083 PH/18 If the "use_postmaster" option was set for a recipient callout together
2084 with the "random" option, the postmaster address was used as the MAIL
2085 FROM address for the random test, but not for the subsequent recipient
2086 test. It is now used for both.
2088 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2089 patch removes a few documentation additions to RFC 3028, because the
2090 latest draft now contains them. It adds the new en;ascii-case comparator
2091 and a new error check for 8bit text in MIME parts. Comparator and
2092 require names are now matched exactly. I enabled the subaddress
2093 extension, but it is not well tested yet (read: it works for me)."
2095 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2096 rework some of the code of TK/09 above to avoid the hardwired use of
2097 "%lld" and "long long". Replaced the call to snprintf() with a call to
2100 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2101 records point to non-existent hosts", "retry timeout exceeded", and
2102 "retry time not reached for any host after a long failure period".
2104 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2105 experimental DomainKeys support:
2107 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2108 (2) On an error such as an illegally used "control", the wrong name for
2109 the control was given.
2111 These problems did NOT occur unless DomainKeys support was compiled.
2113 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2115 PH/24 Added ${if match_ip condition.
2117 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2118 databases so that it will be absolutely obvious if a crash occurs in the
2119 DB library. This is a regular occurrence (often caused by mis-matched
2122 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2123 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2124 picked up on a user's system that detects such things. There doesn't seem
2125 to be a gcc warning option for this - only an attribute that has to be
2126 put on the function's prototype. It seems that in Fedora Core 4 they have
2127 set this on a number of new functions. No doubt there will be more in due
2130 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2131 specify a transport. However, if an address that was verified by such a
2132 router was the subject of a callout, Exim crashed because it tried to
2133 read the rcpt_include_affixes from the non-existent transport. Now it
2134 just assumes that the setting of that option is false. This bug was
2135 introduced by 4.51/PH/31.
2137 PH/28 Changed -d+all to exclude +memory, because that information is very
2138 rarely of interest, but it makes the output a lot bigger. People tend to
2139 do -d+all out of habit.
2141 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2142 code in os-type was giving problems when libc.so lives in lib64, like on
2145 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2146 aren't the modern standard, and it seems that some systems' include files
2147 don't always have them. Exim was already checking for some of the newer
2148 ones like T_AAAA, and defining it itself. I've added checks for all the
2149 record types that Exim uses.
2151 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2152 not automatically generating a new one, as it is supposed to. This
2153 prevented TLS from working. If the file did exist, but contained invalid
2154 data, a new version was generated, as expected. It was only the case of a
2155 non-existent file that was broken.
2157 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2158 with a change in libdomainkeys > 0.64.
2160 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2161 from DNS. If the selector record carries the flag, it now has
2162 precedence over the domain-wide flag.
2164 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2166 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2167 the use of a port name that isn't defined in /etc/services) occurred, the
2168 message was deferred as in a normal delivery, and thus remained on the
2169 spool, instead of being failed because of the mua_wrapper setting. This
2170 is now fixed, and I tidied up some of the mua_wrapper messages at the
2173 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2174 the messages in a hash of arrays rather than using individual hashes.
2175 This is a bit cleaner and results in dramatic memory savings, albeit
2176 at a slight CPU cost.
2178 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2179 as requested by Marc Sherman.
2181 SC/10 Eximstats: added histograms for user specified patterns as requested
2184 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2186 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2187 fopen() in the content-scanning modules that did not already have it.
2193 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2194 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2196 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2198 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2200 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2201 to test Sieve filters that use "vacation".
2203 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2204 that changes the way the GnuTLS parameters are stored in the cache file.
2205 The new format can be generated externally. For backward compatibility,
2206 if the data in the cache doesn't make sense, Exim assumes it has read an
2207 old-format file, and it generates new data and writes a new file. This
2208 means that you can't go back to an older release without removing the
2211 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2212 work if there are any delivery delays because "one_time" forces the
2213 parent to be marked "delivered", so its unseen clone is never tried
2214 again. For this reason, Exim now forbids the simultaneous setting of
2217 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2218 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2219 entry if you want to know the details. The fix, however, neglected to
2220 consider the case when local delivery batching is involved. The test for
2221 "previously delivered" was not happening when checking to see if an
2222 address could be batched with a previous (undelivered) one; under
2223 certain circumstances this could lead to multiple deliveries to the same
2226 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2227 in its include files, and this causes problems building Exim.
2229 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2230 header_syntax) but Exim was just ignoring anything given after a slash.
2231 In particular, this caused confusion with an attempt to use "verify =
2232 reverse_host_lookup/defer_ok". An error is now given when options are
2233 supplied for verify items that do not have them. (Maybe reverse_host_
2234 lookup should have a defer_ok option, but that's a different point.)
2236 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2237 defined by RFC 821) to 2048, because there were problems with some AUTH
2238 commands, and RFC 1869 says the size should be increased for extended
2239 SMTP commands that take arguments.
2241 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2244 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2245 "unknown" error; now it says that the functionality isn't in the binary.
2247 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2248 an address' error message when a string expansion fails (syntax or
2249 whatever). Otherwise the password may appear in the log. Following change
2250 PH/42 below, there is no longer a chance of it appearing in a bounce
2253 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2255 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2256 of its addresses was ever tried. (Bugzilla bug #2.)
2258 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2259 the result incorrectly in the debug output. (It correctly added a newline
2260 to what was transported.)
2262 TF/01 Added $received_time.
2264 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2265 commented out examples of how to interface to a virus scanner and to
2266 SpamAssassin. Also added commented examples of av_scanner and
2267 spamd_address settings.
2269 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2270 and controls are allowed in which ACLs. There were a couple of minor
2271 errors. Some of the entries in the conditions table (which is a table of
2272 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2273 negation of where the condition IS allowed.
2275 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2277 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2278 header file does not have a version number, so I've had to invent a new
2279 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2280 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2281 radiusclient), but it was contributed by a Radius user.
2283 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2284 files or directories, for OpenSSL.
2286 PH/19 When an Exim process that is running as root has to create an Exim log
2287 file, it does so in a subprocess that runs as exim:exim so as to get the
2288 ownership right at creation (otherwise, other Exim processes might see
2289 the file with the wrong ownership). There was no test for failure of this
2290 fork() call, which would lead to the process getting stuck as it waited
2291 for a non-existent subprocess. Forks do occasionally fail when resources
2292 run out. I reviewed all the other calls to fork(); they all seem to check
2295 PH/20 When checking for unexpected SMTP input at connect time (before writing
2296 the banner), Exim was not dealing correctly with a non-positive return
2297 from the read() function. If the client had disconnected by this time,
2298 the result was a log entry for a synchronization error with an empty
2299 string after "input=" when read() returned zero. If read() returned -1
2300 (an event I could not check), uninitialized data bytes were printed.
2301 There were reports of junk text (parts of files, etc) appearing after
2304 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2306 PH/22 Added support for macro redefinition, and (re)definition in between
2307 driver and ACL definitions.
2309 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2310 forgetting to use the resulting value; it was using the unexpanded value.
2312 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2313 hadn't been configured. The fix is from Juergen Kreileder, who
2314 understands it better than I do:
2316 "Here's what I see happening with three configured cyrus_sasl
2317 authenticators configured (plain, login, cram-md5):
2319 On startup auth_cyrus_sasl_init() gets called for each of these.
2320 This means three calls to sasl_listmech() without a specified mech_list.
2321 => SASL tests which mechs of all available mechs actually work
2322 => three warnings about OTP not working
2323 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2325 With the patch, sasl_listmech() also gets called three times. But now
2326 SASL's mech_list option is set to the server_mech specified in the the
2327 authenticator. Or in other words, the answer from sasl_listmech()
2328 gets limited to just the mech you're testing for (which is different
2330 => the return list contains just 'plain' or 'login', 'cram-md5' or
2331 nothing depending on the value of ob->server_mech.
2333 I've just tested the patch: Authentication still works fine,
2334 unavailable mechs specified in the exim configuration are still
2335 caught, and the auth.log warnings about OTP are gone."
2337 PH/25 When debugging is enabled, the contents of the command line are added
2338 to the debugging output, even when log_selector=+arguments is not
2341 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2342 answer is "GNU", and only if the return is "GNU/something" is the answer
2345 PH/27 $acl_verify_message is now set immediately after the failure of a
2346 verification in an ACL, and so is available in subsequent modifiers. In
2347 particular, the message can be preserved by coding like this:
2349 warn !verify = sender
2350 set acl_m0 = $acl_verify_message
2352 Previously, $acl_verify_message was set only while expanding "message"
2353 and "log_message" when a very denied access.
2355 PH/28 Modified OS/os.c-Linux with
2357 -#ifndef OS_LOAD_AVERAGE
2358 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2360 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2361 nomenclature these days.)
2363 PH/29 Installed patch from the Sieve maintainer that adds the options
2364 sieve_useraddress and sieve_subaddress to the redirect router.
2366 PH/30 In these circumstances:
2367 . Two addresses routed to the same list of hosts;
2368 . First host does not offer TLS;
2369 . First host accepts first address;
2370 . First host gives temporary error to second address;
2371 . Second host offers TLS and a TLS session is established;
2372 . Second host accepts second address.
2373 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2374 and peerdn, if requested) that were in fact used only for the second
2377 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2378 attention to any local part prefix or suffix that was matched by the
2379 router that accepted the address. It now behaves in the same way as it
2380 does for delivery: the affixes are removed from the local part unless
2381 rcpt_include_affixes is set on the transport.
2383 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2384 timeout during the DATA phase of an incoming message.
2386 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2387 applied a patch sanctioned by the Sieve maintainer.
2389 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2390 the uid or gid is negative. A case of a negative gid caused this to be
2391 noticed. The fix allows for either to be negative.
2393 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2394 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2397 PH/36 The change PH/12 above was broken. Fixed it.
2399 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2400 the grounds that routing the same address twice would always produce the
2401 same answer. This might have been true once, but it is certainly no
2402 longer true now. Routing a child address may depend on the previous
2403 routing that produced that child. Some complicated redirection strategies
2404 went wrong when messages had multiple recipients, and made Exim's
2405 behaviour dependent on the order in which the addresses were given.
2407 I have moved the duplicate checking until after the routing is complete.
2408 Exim scans the addresses that are assigned to local and remote
2409 transports, and removes any duplicates. This means that more work will be
2410 done, as duplicates will always all be routed, but duplicates are
2411 presumably rare, so I don't expect this is of any significance.
2413 For deliveries to pipes, files, and autoreplies, the duplicate checking
2414 still happens during the routing process, since they are not going to be
2417 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2418 It corrects a timeout issue with spamd. This is Ian's comment: "The
2419 background is that sometimes spamd either never reads data from a
2420 connection it has accepted, or it never writes response data. The exiscan
2421 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2422 blindly assumes that writes won't block so it may never time out."
2424 PH/39 Allow G after quota size as well as K and M.
2426 PH/40 The value set for $authenticated_id in an authenticator may not contain
2427 binary zeroes or newlines because the value is written to log lines and
2428 to spool files. There was no check on this. Now the value is run through
2429 the string_printing() function so that such characters are converted to
2430 printable escape sequences.
2432 PH/41 $message_linecount is a new variable that contains the total number of
2433 lines in the message. Compare $body_linecount, which is the count for the
2436 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2437 bounce and delay warning messages, except in certain special cases, which
2440 (a) An SMTP error message from a remote host;
2441 (b) A message specified in a :fail: redirection;
2442 (c) A message specified in a "fail" command in a system filter;
2443 (d) A message specified in a FAIL return from the queryprogram router;
2444 (e) A message specified by the cannot_route_message router option.
2446 In these cases only, Exim does include the error details in bounce and
2447 warning messages. There are also a few cases where bland messages such
2448 as "unrouteable address" or "local delivery error" are given.
2450 PH/43 $value is now also set for the "else" part of a ${run expansion.
2452 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2453 being worked on, but at least Exim now implements the latest version to
2456 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2457 process to complete was treated as a delivery failure, a timeout while
2458 writing the message to the pipe was logged, but erroneously treated as a
2459 successful delivery. Such timeouts include transport filter timeouts. For
2460 consistency with the overall process timeout, these timeouts are now
2461 treated as errors, giving rise to delivery failures by default. However,
2462 there is now a new Boolean option for the pipe transport called
2463 timeout_defer, which, if set TRUE, converts the failures into defers for
2464 both kinds of timeout. A transport filter timeout is now identified in
2467 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2468 systems where "make" and "gmake" are different, calling "gmake" at top
2469 level broke things. I've arranged for the value of $(MAKE) to be passed
2470 from the Makefile to this script so that it can call the same version of
2474 A note about Exim versions 4.44 and 4.50
2475 ----------------------------------------
2477 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2478 changes of various kinds. As a consequence, a big documentation update was
2479 needed. This delayed the release for rather longer than seemed good, especially
2480 in the light of a couple of (minor) security issues. Therefore, the changes
2481 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2482 release. So 4.44 and 4.50 are in effect two different branches that both start
2485 I have left the 4.50 change log unchanged; it contains all the changes since
2486 4.43. The change log for 4.44 is below; many of its items are identical to
2487 those for 4.50. This seems to be the most sensible way to preserve the
2488 historical information.
2494 1. Minor wording change to the doc/README.SIEVE file.
2496 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2497 computation of the current number of files was incorrect.
2499 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2500 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2503 4. Give more explanation in the error message when the command for a transport
2504 filter fails to execute.
2506 5. There are several places where Exim runs a non-Exim command in a
2507 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2508 was being done only for the command run by the queryprogram router. It is
2509 now done for all such subprocesses. The other cases are: ${run, transport
2510 filters, and the commands run by the lmtp and pipe transports.
2512 6. Added CONFIGURE_GROUP build-time option.
2514 7. Some older OS have a limit of 256 on the maximum number of file
2515 descriptors. Exim was using setrlimit() to set 1000 as a large value
2516 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2517 systems. I've change it so that if it can't get 1000, it tries for 256.
2519 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2520 was an oversight, and furthermore, ever since the addition of extra
2521 controls (e.g. 4.43/32), the checks on when to allow different forms of
2522 "control" were broken. There should now be diagnostics for all cases when a
2523 control that does not make sense is encountered.
2525 9. Added the /retain_sender option to "control=submission".
2527 10. $recipients is now available in the predata ACL (oversight).
2529 11. Tidy the search cache before the fork to do a delivery from a message
2530 received from the command line. Otherwise the child will trigger a lookup
2531 failure and thereby defer the delivery if it tries to use (for example) a
2532 cached ldap connection that the parent has called unbind on.
2534 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2535 of $address_data from the recipient verification was clobbered by the
2536 sender verification.
2538 13. The value of address_data from a sender verification is now available in
2539 $sender_address_data in subsequent conditions in the ACL statement.
2541 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2543 15. Added a new option "connect=<time>" to callout options, to set a different
2546 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2547 was its contents. (It was OK if the option was not defined at all.)
2549 17. A "Completed" log line is now written for messages that are removed from
2550 the spool by the -Mrm option.
2552 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2553 information about exactly what failed.
2555 19. Added -dd to debug only the daemon process.
2557 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2558 handles timeouts, both on the server side and network timeouts. Renamed the
2559 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2561 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2562 It is now set to "smtps".
2564 22. $host_address is now set to the target address during the checking of
2565 ignore_target_hosts.
2567 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2568 being passed; this would have caused $sender_host_name to have been used if
2569 matching the list had actually called for a host name (not very likely,
2570 since this list is usually IP addresses). A host name is now passed as
2573 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2574 code that specifies a non-restarting handler (typically sigaction() in
2575 modern systems) in an attempt to fix a rare and obscure crash bug.
2577 25. Narrowed the window for a race in the daemon that could cause it to ignore
2578 SIGCHLD signals. This is not a major problem, because they are used only to
2579 wake it up if nothing else does.
2581 26. A malformed maildirsize file could cause Exim to calculate negative values
2582 for the mailbox size or file count. Odd effects could occur as a result.
2583 The maildirsize information is now recalculated if the size or filecount
2586 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2587 support for a long time. Removed HAVE_SYS_VFS_H.
2589 28. Installed the latest version of exipick from John Jetmore.
2591 29. In an address list, if the pattern was not a regular expression, an empty
2592 subject address (from a bounce message) matched only if the pattern was an
2593 empty string. Non-empty patterns were not even tested. This was the wrong
2594 because it is perfectly reasonable to use an empty address as part of a
2595 database query. An empty address is now tested by patterns that are
2596 lookups. However, all the other forms of pattern expect the subject to
2597 contain a local part and a domain, and therefore, for them, an empty
2598 address still always fails if the pattern is not itself empty.
2600 30. Exim went into a mad DNS loop when attempting to do a callout where the
2601 host was specified on an smtp transport, and looking it up yielded more
2602 than one IP address.
2604 31. Re-factored the code for checking spool and log partition space into a
2605 function that finds that data and another that does the check. The former
2606 is then used to implement four new variables: $spool_space, $log_space,
2607 $spool_inodes, and $log_inodes.
2609 32. The RFC2047 encoding function was originally intended for short strings
2610 such as real names; it was not keeping to the 75-character limit for
2611 encoded words that the RFC imposes. It now respects the limit, and
2612 generates multiple encoded words if necessary. To be on the safe side, I
2613 have increased the buffer size for the ${rfc2047: expansion operator from
2616 33. It is now permitted to omit both strings after an "if" condition; if the
2617 condition is true, the result is "true". As before, when the second string
2618 is omitted, a false condition yields an empty string. This makes it less
2619 cumbersome to write custom ACL and router conditions.
2621 34. Failure to deliver a bounce message always caused it to be frozen, even if
2622 there was an errors_to setting on the router. The errors_to setting is now
2625 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2626 canonical form (fully expanded) before being placed in
2627 $sender_host_address.
2629 36. The table in the code that translates DNS record types into text (T_A to
2630 "A" for instance) was missing entries for NS and CNAME. It is just possible
2631 that this could have caused confusion if both these types were looked up
2632 for the same domain, because the text type is used as part of Exim's
2633 per-process caching. But the chance of anyone hitting this buglet seems
2636 37. The dnsdb lookup has been extended in a number of ways.
2638 (1) There is a new type, "zns", which walks up the domain tree until it
2639 finds some nameserver records. It should be used with care.
2641 (2) There is a new type, "mxh", which is like "mx" except that it returns
2642 just the host names, not the priorities.
2644 (3) It is now possible to give a list of domains (or IP addresses) to be
2645 looked up. The behaviour when one of the lookups defers can be
2646 controlled by a keyword.
2648 (4) It is now possible to specify the separator character for use when
2649 multiple records are returned.
2651 38. The dnslists ACL condition has been extended: it is now possible to supply
2652 a list of IP addresses and/or domains to be looked up in a particular DNS
2655 39. Added log_selector=+queue_time_overall.
2657 40. When running the queue in the test harness, wait just a tad after forking a
2658 delivery process, to get repeatability of debugging output.
2660 41. Include certificate and key file names in error message when GnuTLS fails
2661 to set them up, because the GnuTLS error message doesn't include the name
2662 of the failing file when there is a problem reading it.
2664 42. Allow both -bf and -bF in the same test run.
2666 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2668 44. The "Exiscan patch" is now merged into the mainline Exim source.
2670 45. Sometimes the final signoff response after QUIT could fail to get
2671 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2672 < 0 before doing a fflush(). This bug looks as though it goes back to the
2673 introduction of TLS in release 3.20, but "sometimes" must have been rare
2674 because the tests only now provoked it.
2676 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2677 (this can affect the format of dates).
2679 47. exim_tidydb, when checking for the continued existence of a message for
2680 which it has found a message-specific retry record, was not finding
2681 messages that were in split spool directories. Consequently, it was
2682 deleting retry records that should have stayed in existence.
2684 48. Steve fixed some bugs in eximstats.
2686 49. The SPA authentication driver was not abandoning authentication and moving
2687 on to the next authenticator when an expansion was forced to fail,
2688 contradicting the general specification for all authenticators. Instead it
2689 was generating a temporary error. It now behaves as specified.
2691 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2692 (the order specifies the preference for clients). The order is now AES256,
2693 AES128, 3DES, ARCFOUR128.
2695 51. Small patch to Sieve code - explicitly set From: when generating an
2698 52. Exim crashed if a remote delivery caused a very long error message to be
2699 recorded - for instance if somebody sent an entire SpamAssassin report back
2700 as a large number of 550 error lines. This bug was coincidentally fixed by
2701 increasing the size of one of Exim's internal buffers (big_buffer) that
2702 happened as part of the Exiscan merge. However, to be on the safe side, I
2703 have made the code more robust (and fixed the comments that describe what
2706 53. Now that there can be additional text after "Completed" in log lines (if
2707 the queue_time_overall log selector is set), a one-byte patch to exigrep
2708 was needed to allow it to recognize "Completed" as not the last thing in
2711 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2712 patch that reportedly fixes this has been added. I am not expert enough to
2713 create a test for it. This is what the patch creator wrote:
2715 "I found a little strange behaviour of ldap code when working with
2716 Windows 2003 AD Domain, where users was placed in more than one
2717 Organization Units. When I tried to give exim partial DN, the exit code
2718 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2719 But simultaneously result of request was absolutely normal ldap result,
2720 so I produce this patch..."
2722 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2723 REFERENCE, so I have modified the code to exclude the patch when that macro
2726 55. Some experimental protocols are using DNS PTR records for new purposes. The
2727 keys for these records are domain names, not reversed IP addresses. The
2728 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2729 leaves it alone. Component reversal etc. now happens only for IP addresses.
2732 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2734 57. Double the size of the debug message buffer (to 2048) so that more of very
2735 long debug lines gets shown.
2737 58. The exicyclog utility now does better if the number of log files to keep
2738 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2740 59. Two changes related to the smtp_active_hostname option:
2742 (1) $smtp_active_hostname is now available as a variable.
2743 (2) The default for smtp_banner uses $smtp_active_hostname instead
2744 of $primary_hostname.
2746 60. The host_aton() function is supposed to be passed a string that is known
2747 to be a valid IP address. However, in the case of IPv6 addresses, it was
2748 not checking this. This is a hostage to fortune. Exim now panics and dies
2749 if the condition is not met. A case was found where this could be provoked
2750 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2751 components; fortuitously, this particular loophole had already been fixed
2752 by change 4.50/55 above.
2754 If there are any other similar loopholes, the new check in host_aton()
2755 itself should stop them being exploited. The report I received stated that
2756 data on the command line could provoke the exploit when Exim was running as
2757 exim, but did not say which command line option was involved. All I could
2758 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2759 running as the user.
2762 61. There was a buffer overflow vulnerability in the SPA authentication code
2763 (which came originally from the Samba project). I have added a test to the
2764 spa_base64_to_bits() function which I hope fixes it.
2767 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2768 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2770 63. The daemon start-up calls getloadavg() while still root for those OS that
2771 need the first call to be done as root, but it missed one case: when
2772 deliver_queue_load_max is set with deliver_drop_privilege. This is
2773 necessary for the benefit of the queue runner, because there is no re-exec
2774 when deliver_drop_privilege is set.
2776 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2777 This has been fixed.
2779 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2780 was in use, was not putting the data itself into the right store pool;
2781 consequently, it could be overwritten for a subsequent message in the same
2782 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2785 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2787 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2788 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2789 the function were treating the return as a boolean value, which happened to
2790 work because 0=false and not-0=true, but is not correct code.
2792 68. The host_aton() function was not handling scoped IPv6 addresses (those
2793 with, for example, "%eth0" on the end) correctly.
2795 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2796 negated items (that is, ~something) in unsigned ints. Some compilers
2797 apparently mutter when there is no cast.
2799 70. If an address verification called from an ACL failed, and did not produce a
2800 user-specific message (i.e. there was only a "system" message), nothing was
2801 put in $acl_verify_message. In this situation, it now puts the system
2804 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2805 session; change 4.31/43 added the unwanted input to the log line - except
2806 that it did not do this in the start of session case. It now does.
2808 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2809 This is wrong and can cause the other end to generate a synchronization
2810 error if it is another Exim or anything else that does the synchronization
2811 check. A QUIT command is no longer sent after a timeout.
2813 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2814 during host lookups.
2816 74. The defer_ok option of callout verification was not working if it was used
2817 when verifying addresses in header lines, that is, for this case:
2819 verify = header_sender/callout=defer_ok
2821 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2822 those file descriptors could be used for SMTP connections. If anything
2823 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2824 could be sent to the SMTP client, causing chaos. The daemon now opens
2825 stdin, stdout, and stderr to /dev/null when it puts itself into the
2828 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2829 log by default. The user can override this with suitable Perl magic.
2831 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2832 the log message when discard triggers, was not working for the DATA ACL or
2833 for the non-SMTP ACL.
2835 78. Error message wording change in sieve.c.
2837 79. If smtp_accept_max_per_host was set, the number of connections could be
2838 restricted to fewer than expected, because the daemon was trying to set up
2839 a new connection before checking whether the processes handling previous
2840 connections had finished. The check for completed processes is now done
2841 earlier. On busy systems, this bug wouldn't be noticed because something
2842 else would have woken the daemon, and it would have reaped the completed
2845 80. If a message was submitted locally by a user whose login name contained one
2846 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2847 It caused a spool format error. I have fixed the spool reading code. A
2848 related problem was that the "from" clause in the Received: line became
2849 illegal because of the space(s). It is now covered by ${quote_local_part.
2851 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2854 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2856 83. Patch from Sieve maintainer to fix unterminated string problem in
2857 "vacation" handling.
2859 84. Some minor changes to the Linux configuration files to help with other
2860 OS variants using glibc.
2862 85. One more patch for Sieve to update vacation handling to latest spec.
2865 ----------------------------------------------------
2866 See the note above about the 4.44 and 4.50 releases.
2867 ----------------------------------------------------
2873 1. Change 4.43/35 introduced a bug that caused file counts to be
2874 incorrectly computed when quota_filecount was set in an appendfile
2877 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2878 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2881 3. Give more explanation in the error message when the command for a transport
2882 filter fails to execute.
2884 4. There are several places where Exim runs a non-Exim command in a
2885 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2886 was being done only for the command run by the queryprogram router. It is
2887 now done for all such subprocesses. The other cases are: ${run, transport
2888 filters, and the commands run by the lmtp and pipe transports.
2890 5. Some older OS have a limit of 256 on the maximum number of file
2891 descriptors. Exim was using setrlimit() to set 1000 as a large value
2892 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2893 systems. I've change it so that if it can't get 1000, it tries for 256.
2895 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2896 was an oversight, and furthermore, ever since the addition of extra
2897 controls (e.g. 4.43/32), the checks on when to allow different forms of
2898 "control" were broken. There should now be diagnostics for all cases when a
2899 control that does not make sense is encountered.
2901 7. $recipients is now available in the predata ACL (oversight).
2903 8. Tidy the search cache before the fork to do a delivery from a message
2904 received from the command line. Otherwise the child will trigger a lookup
2905 failure and thereby defer the delivery if it tries to use (for example) a
2906 cached ldap connection that the parent has called unbind on.
2908 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2909 of $address_data from the recipient verification was clobbered by the
2910 sender verification.
2912 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2913 was its contents. (It was OK if the option was not defined at all.)
2915 11. A "Completed" log line is now written for messages that are removed from
2916 the spool by the -Mrm option.
2918 12. $host_address is now set to the target address during the checking of
2919 ignore_target_hosts.
2921 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2922 being passed; this would have caused $sender_host_name to have been used if
2923 matching the list had actually called for a host name (not very likely,
2924 since this list is usually IP addresses). A host name is now passed as
2927 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2928 code that specifies a non-restarting handler (typically sigaction() in
2929 modern systems) in an attempt to fix a rare and obscure crash bug.
2931 15. Narrowed the window for a race in the daemon that could cause it to ignore
2932 SIGCHLD signals. This is not a major problem, because they are used only to
2933 wake it up if nothing else does.
2935 16. A malformed maildirsize file could cause Exim to calculate negative values
2936 for the mailbox size or file count. Odd effects could occur as a result.
2937 The maildirsize information is now recalculated if the size or filecount
2940 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2941 support for a long time. Removed HAVE_SYS_VFS_H.
2943 18. Updated exipick to current release from John Jetmore.
2945 19. Allow an empty sender to be matched against a lookup in an address list.
2946 Previously the only cases considered were a regular expression, or an
2949 20. Exim went into a mad DNS lookup loop when doing a callout where the
2950 host was specified on the transport, if the DNS lookup yielded more than
2953 21. The RFC2047 encoding function was originally intended for short strings
2954 such as real names; it was not keeping to the 75-character limit for
2955 encoded words that the RFC imposes. It now respects the limit, and
2956 generates multiple encoded words if necessary. To be on the safe side, I
2957 have increased the buffer size for the ${rfc2047: expansion operator from
2960 22. Failure to deliver a bounce message always caused it to be frozen, even if
2961 there was an errors_to setting on the router. The errors_to setting is now
2964 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2965 canonical form (fully expanded) before being placed in
2966 $sender_host_address.
2968 24. Updated eximstats to version 1.33
2970 25. Include certificate and key file names in error message when GnuTLS fails
2971 to set them up, because the GnuTLS error message doesn't include the name
2972 of the failing file when there is a problem reading it.
2974 26. Expand error message when OpenSSL has problems setting up cert/key files.
2977 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2978 (this can affect the format of dates).
2980 28. exim_tidydb, when checking for the continued existence of a message for
2981 which it has found a message-specific retry record, was not finding
2982 messages that were in split spool directories. Consequently, it was
2983 deleting retry records that should have stayed in existence.
2985 29. eximstats updated to version 1.35
2986 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2987 1.35 - bugfix such that pie charts by volume are generated correctly
2989 30. The SPA authentication driver was not abandoning authentication and moving
2990 on to the next authenticator when an expansion was forced to fail,
2991 contradicting the general specification for all authenticators. Instead it
2992 was generating a temporary error. It now behaves as specified.
2994 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2995 (the order specifies the preference for clients). The order is now AES256,
2996 AES128, 3DES, ARCFOUR128.
2998 31. Small patch to Sieve code - explicitly set From: when generating an
3001 32. Exim crashed if a remote delivery caused a very long error message to be
3002 recorded - for instance if somebody sent an entire SpamAssassin report back
3003 as a large number of 550 error lines. This bug was coincidentally fixed by
3004 increasing the size of one of Exim's internal buffers (big_buffer) that
3005 happened as part of the Exiscan merge. However, to be on the safe side, I
3006 have made the code more robust (and fixed the comments that describe what
3009 33. Some experimental protocols are using DNS PTR records for new purposes. The
3010 keys for these records are domain names, not reversed IP addresses. The
3011 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3012 leaves it alone. Component reversal etc. now happens only for IP addresses.
3015 34. The host_aton() function is supposed to be passed a string that is known
3016 to be a valid IP address. However, in the case of IPv6 addresses, it was
3017 not checking this. This is a hostage to fortune. Exim now panics and dies
3018 if the condition is not met. A case was found where this could be provoked
3019 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3020 components; fortuitously, this particular loophole had already been fixed
3021 by change 4.50/55 or 4.44/33 above.
3023 If there are any other similar loopholes, the new check in host_aton()
3024 itself should stop them being exploited. The report I received stated that
3025 data on the command line could provoke the exploit when Exim was running as
3026 exim, but did not say which command line option was involved. All I could
3027 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3028 running as the user.
3031 35. There was a buffer overflow vulnerability in the SPA authentication code
3032 (which came originally from the Samba project). I have added a test to the
3033 spa_base64_to_bits() function which I hope fixes it.
3036 36. The daemon start-up calls getloadavg() while still root for those OS that
3037 need the first call to be done as root, but it missed one case: when
3038 deliver_queue_load_max is set with deliver_drop_privilege. This is
3039 necessary for the benefit of the queue runner, because there is no re-exec
3040 when deliver_drop_privilege is set.
3042 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3043 was in use, was not putting the data itself into the right store pool;
3044 consequently, it could be overwritten for a subsequent message in the same
3045 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3048 38. Sometimes the final signoff response after QUIT could fail to get
3049 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3050 < 0 before doing a fflush(). This bug looks as though it goes back to the
3051 introduction of TLS in release 3.20, but "sometimes" must have been rare
3052 because the tests only now provoked it.
3058 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3059 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3060 Now it returns an integer. A number of calls were still expecting a T/F
3061 return. Fortuitously, in all cases, the tests worked in OK situations,
3062 which is the norm. However, things would have gone wrong on any write
3063 failures on the smtp file descriptor. This function is used when sending
3064 messages over SMTP and also when doing verify callouts.
3066 2. When Exim is called to do synchronous delivery of a locally submitted
3067 message (the -odf or -odi options), it no longer closes stderr before doing
3070 3. Implemented the mua_wrapper option.
3072 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3074 5. Implemented the functions header_remove(), header_testname(),
3075 header_add_at_position(), and receive_remove_recipient(), and exported them
3078 6. If an ACL "warn" statement specified the addition of headers, Exim already
3079 inserted X-ACL-Warn: at the start if there was no header name. However, it
3080 was not making this test for the second and subsequent header lines if
3081 there were newlines in the string. This meant that an invalid header could
3082 be inserted if Exim was badly configured.
3084 7. Allow an ACL "warn" statement to add header lines at the start or after all
3085 the Received: headers, as well as at the end.
3087 8. Added the rcpt_4xx retry error code.
3089 9. Added postmaster_mailfrom=xxx to callout verification option.
3091 10. Added mailfrom=xxxx to the callout verification option, for verify=
3094 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3095 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3097 12. Inserted some casts to stop certain compilers warning when using pointer
3098 differences as field lengths or precisions in printf-type calls (mostly
3099 affecting debugging statements).
3101 13. Added optional readline() support for -be (dynamically loaded).
3103 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3104 same clock tick as a message's arrival, so that its received time was the
3105 same as the "first fail" time on the retry record, and that message
3106 remained on the queue past the ultimate address timeout, every queue runner
3107 would try a delivery (because it was past the ultimate address timeout) but
3108 after another failure, the ultimate address timeout, which should have then
3109 bounced the address, did not kick in. This was a "< instead of <=" error;
3110 in most cases the first failure would have been in the next clock tick
3111 after the received time, and all would be well.
3113 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3114 being recognized when the domain list was tested by the match_domain
3115 condition in an expansion string.
3117 16. Added the ${str2b64: operator.
3119 17. Exim was always calling setrlimit() to set a large limit for the number of
3120 processes, without checking whether the existing limit was already
3121 adequate. (It did check for the limit on file descriptors.) Furthermore,
3122 errors from getrlimit() and setrlimit() were being ignored. Now they are
3123 logged to the main and panic logs, but Exim does carry on, to try to do its
3124 job under whatever limits there are.
3126 18. Imported PCRE 5.0.
3128 19. Trivial typo in log message " temporarily refused connection" (the leading
3131 20. If the log selector return_path_on_delivery was set and an address was
3132 redirected to /dev/null, the delivery process crashed because it assumed
3133 that a return path would always be set for a "successful" delivery. In this
3134 case, the whole delivery is bypassed as an optimization, and therefore no
3137 21. Internal re-arrangement: the function for sending a challenge and reading
3138 a response while authentication was assuming a zero-terminated challenge
3139 string. It's now changed to take a pointer and a length, to allow for
3140 binary data in such strings.
3142 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3144 23. Exim was not respecting finduser_retries when seeking the login of the
3145 uid under which it was called; it was always trying 10 times. (The default
3146 setting of finduser_retries is zero.) Also, it was sleeping after the final
3147 failure, which is pointless.
3149 24. Implemented tls_on_connect_ports.
3151 25. Implemented acl_smtp_predata.
3153 26. If the domain in control=submission is set empty, Exim assumes that the
3154 authenticated id is a complete email address when it generates From: or
3155 Sender: header lines.
3157 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3158 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3159 chown and chgrp in /bin and hostname in /usr/bin.
3161 28. Exim was keeping the "process log" file open after each use, just as it
3162 does for the main log. This opens the possibility of it remaining open for
3163 long periods when the USR1 signal hits a daemon. Occasional processlog
3164 errors were reported, that could have been caused by this. Anyway, it seems
3165 much more sensible not to leave this file open at all, so that is what now
3168 29. The long-running daemon process does not normally write to the log once it
3169 has entered its main loop, and it closes the log before doing so. This is
3170 so that log files can straightforwardly be renamed and moved. However,
3171 there are a couple of unusual error situations where the daemon does write
3172 log entries, and I had neglected to close the log afterwards.
3174 30. The text of an SMTP error response that was received during a remote
3175 delivery was being truncated at 512 bytes. This is too short for some of
3176 the long messages that one sometimes sees. I've increased the limit to
3179 31. It is now possible to make retry rules that apply only when a message has a
3180 specific sender, in particular, an empty sender.
3182 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3183 it possible to be selective about when SMTP synchronization is enforced.
3185 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3187 32. Implemented hosts_connection_nolog.
3189 33. Added an ACL for QUIT.
3191 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3194 35. Added mailbox_size and mailbox_filecount to appendfile.
3196 36. Added control = no_multiline_responses to ACLs.
3198 37. There was a bug in the logic of the code that waits for the clock to tick
3199 in the case where the clock went backwards by a substantial amount such
3200 that the microsecond fraction of "now" was more than the microsecond
3201 fraction of "then" (but the whole seconds number was less).
3203 38. Added support for the libradius Radius client library this is found on
3204 FreeBSD (previously only the radiusclient library was supported).
3210 1. When certain lookups returned multiple values in the form name=value, the
3211 quoting of the values was not always being done properly. Specifically:
3212 (a) If the value started with a double quote, but contained no whitespace,
3214 (b) If the value contained whitespace other than a space character (i.e.
3215 tabs or newlines or carriage returns) it was not quoted.
3216 This fix has been applied to the mysql and pgsql lookups by writing a
3217 separate quoting function and calling it from the lookup code. The fix
3218 should probably also be applied to nisplus, ibase and oracle lookups, but
3219 since I cannot test any of those, I have not disturbed their existing code.
3221 2. A hit in the callout cache for a specific address caused a log line with no
3222 reason for rejecting RCPT. Now it says "Previous (cached) callout
3223 verification failure".
3225 3. There was an off-by-one bug in the queryprogram router. An over-long
3226 return line was truncated at 256 instead of 255 characters, thereby
3227 overflowing its buffer with the terminating zero. As well as fixing this, I
3228 have increased the buffer size to 1024 (and made a note to document this).
3230 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3231 when Exim is waiting for an SMTP response from a remote server, Exim
3232 restarts its select() call on the socket, thereby resetting its timeout.
3233 This is not a problem when such interrupts are rare. Somebody set up a cron
3234 job to run exiwhat every 2 minutes, which is less than the normal select()
3235 timeout (5 or 10 minutes). This meant that the select() timeout never
3236 kicked in because it was always reset. I have fixed this by comparing the
3237 time when an interrupt arrives with the time at the start of the first call
3238 to select(). If more time than the timeout has elapsed, the interrupt is
3239 treated as a timeout.
3241 5. Some internal re-factoring in preparation for the addition of Sieve
3242 extensions (by MH). In particular, the "personal" test is moved to a
3243 separate function, and given an option for scanning Cc: and Bcc: (which is
3244 not set for Exim filters).
3246 6. When Exim created an email address using the login of the caller as the
3247 local part (e.g. when creating a From: or Sender: header line), it was not
3248 quoting the local part when it contained special characters such as @.
3250 7. Installed new OpenBSD configuration files.
3252 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3253 try to make them clearer.
3255 9. Callout options, other than the timeout value, were being ignored when
3256 verifying sender addresses in header lines. For example, when using
3258 verify = header_sender/callout=no_cache
3260 the cache was (incorrectly) being used.
3262 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3263 only the Cygwin environment.
3265 11. When return_path_on_delivery was set as a log selector, if different remote
3266 addresses in the same message used different return paths and parallel
3267 remote delivery occurred, the wrong values would sometimes be logged.
3268 (Whenever a remote delivery process finished, the return path value from
3269 the most recently started remote delivery process was logged.)
3271 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3272 lines when AUTH and/or TLS are in use. This is the "received protocol"
3273 field. Exim used to use "asmtp" for authenticated SMTP, without any
3274 indication (in the protocol name) for TLS use. Now it follows the RFC and
3275 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3276 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3277 names appear in log lines as well as in Received: header lines.
3279 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3280 extensions, and comparison tests, and to fix some bugs.
3282 14. Changes to the "personal" filter test:
3284 (1) The test was buggy in that it was just doing the equivalent of
3285 "contains" tests on header lines. For example, if a user's address was
3286 anne@some.where, the "personal" test would incorrectly be true for
3288 To: susanne@some.where
3290 This test is now done by extracting each address from the header in turn,
3291 and checking the entire address. Other tests that are part of "personal"
3292 are now done using regular expressions (for example, to check local parts
3293 of addresses in From: header lines).
3295 (2) The list of non-personal local parts in From: addresses has been
3296 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3297 taken from the Sieve specification recommendations.
3299 (3) If the message contains any header line starting with "List-" it is
3300 treated as non-personal.
3302 (4) The test for "circular" in the Subject: header line has been removed
3303 because it now seems ill-conceived.
3305 15. Minor typos in src/EDITME comments corrected.
3307 16. Installed latest exipick from John Jetmore.
3309 17. If headers_add on a router specified a text string that was too long for
3310 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3311 of string_sprintf() is now avoided.
3313 18. $message_body_size was not set (it was always zero) when running the DATA
3314 ACL and the local_scan() function.
3316 19. For the "mail" command in an Exim filter, no default was being set for
3317 the once_repeat time, causing a random time value to be used if "once" was
3318 specified. (If the value happened to be <= 0, no repeat happened.) The
3319 default is now 0s, meaning "never repeat". The "vacation" command was OK
3320 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3321 (I found it when inspecting the code).
3323 20. There is now an overall timeout for performing a callout verification. It
3324 defaults to 4 times the callout timeout, which applies to individual SMTP
3325 commands during the callout. The overall timeout applies when there is more
3326 than one host that can be tried. The timeout is checked before trying the
3327 next host. This prevents very long delays if there are a large number of
3328 hosts and all are timing out (e.g. when the network connections are timing
3329 out). The value of the overall timeout can be changed by specifying an
3330 additional sub-option for "callout", called "maxwait". For example:
3332 verify = sender/callout=5s,maxwait=20s
3334 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3335 to the end before writing, but this should make it even safer).
3337 22. Exim was forgetting that it had advertised PIPELINING for the second and
3338 subsequent messages on an SMTP connection. It was also not resetting its
3339 memory on STARTTLS and an internal HELO.
3341 23. When Exim logs an SMTP synchronization error within a session, it now
3342 records whether PIPELINING has been advertised or not.
3344 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3345 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3346 rather than long int.
3348 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3350 26. Added the never_mail option to autoreply.
3356 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3357 crash if the getsockname() call failed; this can happen if a connection is
3358 closed very soon after it is established. The problem was simply in the
3359 order in which certain operations were done, causing Exim to try to write
3360 to the SMTP stream before it had set up the file descriptor. The bug has
3361 been fixed by making things happen in the correct order.
3367 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3368 before the connection was closed, thus losing the rejection response.
3370 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3371 some early Solaris releases, but causes trouble in current releases where
3372 socklen_t is defined.
3374 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3377 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3380 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3381 that releasing the top of it at the end releases what was used for sub-
3382 expansions (unless the block got too big). However, discard this block if
3383 the first thing is a variable or header, so that we can use its block when
3384 it is dynamic (useful for very large $message_headers, for example).
3386 6. Lookups now cache *every* query, not just the most recent. A new, separate
3387 store pool is used for this. It can be recovered when all lookup caches are
3388 flushed. Lookups now release memory at the end of their result strings.
3389 This has involved some general refactoring of the lookup sources.
3391 7. Some code has been added to the store_xxx() functions to reduce the amount
3392 of flapping under certain conditions.
3394 8. log_incoming_interface used to affect only the <= reception log lines. Now
3395 it causes the local interface and port to be added to several more SMTP log
3396 lines, for example "SMTP connection from", and rejection lines.
3398 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3400 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3402 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3403 could be overwritten at the end of the current message (or the start of a
3404 new message if it was set in a HELO ACL). The value is now preserved for
3405 the duration of the SMTP connection.
3407 12. If a transport had a headers_rewrite setting, and a matching header line
3408 contained an unqualified address, that address was qualified, even if it
3409 did not match any rewriting rules. The underlying bug was that the values
3410 of the flags that permit the existence of unqualified sender and recipient
3411 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3412 non-local messages, and by -bnq for local messages) were not being
3413 preserved with the message after it was received.
3415 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3416 "next input=" as part of the text comprising the host identity instead of
3417 the correct text. The code was using the same buffer for two different
3418 strings. However, depending on which order the printing function evaluated
3419 its arguments, the bug did not always show up. Under Linux, for example, my
3420 test suite worked just fine.
3422 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3423 doesn't work with some older versions of Perl. It has been changed to "my",
3424 which in any case is probably the better facility to use.
3426 15. A really picky compiler found some instances of statements for creating
3427 error messages that either had too many or two few arguments for the format
3430 16. The size of the buffer for calls to the DNS resolver has been increased
3431 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3432 for addresses that have a lot of PTR records. This alleviates a problem; it
3433 does not fully solve it.
3435 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3436 buffer now truncates the list and logs the incident, which is the same
3437 action as happens when Exim is looking up a host name and its aliases.
3438 Previously in this situation something unpredictable would happen;
3439 sometimes it was "internal error: store_reset failed".
3441 18. If a server dropped the connection unexpectedly when an Exim client was
3442 using GnuTLS and trying to read a response, the client delivery process
3443 crashed while trying to generate an error log message.
3445 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3446 string, for example:
3448 warn message = H1: something\nH2: something
3450 the text was added as a single header line from Exim's point of view
3451 though it ended up OK in the delivered message. However, searching for the
3452 second and subsequent header lines using $h_h2: did not work. This has been
3453 fixed. Similarly, if a system filter added multiple headers in this way,
3454 the routers could not see them.
3456 20. Expanded the error message when iplsearch is called with an invalid key to
3457 suggest using net-iplsearch in a host list.
3459 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3460 ACLs are no longer actually imposed (and a message to that effect is
3463 22. If a "gecos" field in a passwd entry contained escaped characters, in
3464 particular, if it contained a \" sequence, Exim got it wrong when building
3465 a From: or a Sender: header from that name. A second bug also caused
3466 incorrect handling when an unquoted " was present following a character
3467 that needed quoting.
3469 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3470 was not being matched caselessly.
3472 24. Arranged for all hyphens in the exim.8 source to be escaped with
3475 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3476 properly. Recipient callout cache records were still being keyed to include
3477 the sender, even when use_sender was set false. This led to far more
3478 callouts that were necessary. The sender is no longer included in the key
3479 when use_sender is false.
3481 26. Added "control = submission" modifier to ACLs.
3483 27. Added the ${base62d: operator to decode base 62 numbers.
3485 28. dnsdb lookups can now access SRV records.
3487 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3488 the configuration file.
3490 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3491 (-v) mode. This makes the output for a verbose queue run more intelligible.
3493 31. Added a use_postmaster feature to recipient callouts.
3495 32. Added the $body_zerocount variable, containing the number of binary zero
3496 bytes in the message body.
3498 33. The time of last modification of the "new" subdirectory is now used as the
3499 "mailbox time last read" when there is a quota error for a maildir
3502 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3504 35. Added +ignore_unknown as a special item in host lists.
3506 36. Code for decoding IPv6 addresses in host lists is now included, even if
3507 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3508 address was recognized as an IP address, but was then not correctly decoded
3509 into binary, causing unexpected and incorrect effects when compared with
3516 1. Very minor rewording of debugging text in manualroute to say "list of
3517 hosts" instead of "hostlist".
3519 2. If verify=header_syntax was set, and a header line with an unqualified
3520 address (no domain) and a large number of spaces between the end of the
3521 name and the colon was received, the reception process suffered a buffer
3522 overflow, and (when I tested it) crashed. This was caused by some obsolete
3523 code that should have been removed. The fix is to remove it!
3525 3. When running in the test harness, delay a bit after writing a bounce
3526 message to get a bit more predictability in the log output.
3528 4. Added a call to search_tidyup() just before forking a reception process. In
3529 theory, someone could use a lookup in the expansion of smtp_accept_max_
3530 per_host which, without the tidyup, could leave open a database connection.
3532 5. Added the variables $recipient_data and $sender_data which get set from a
3533 lookup success in an ACL "recipients" or "senders" condition, or a router
3534 "senders" option, similar to $domain_data and $local_part_data.
3536 6. Moved the writing of debug_print from before to after the "senders" test
3539 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3540 problems for message scanning, either using a data ACL, or using
3541 local_scan() because the Received: header was not generated till after they
3542 were called (in order to set the time as the time of reception completion).
3543 I have revised the way this works. The header is now generated after the
3544 body is received, but before the ACL or local_scan() are called. After they
3545 are run, the timestamp in the header is updated.
3551 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3552 before starting a queue runner without re-exec. This happened only when
3553 deliver_drop_privilege was set or when the Exim user was set to root. The
3554 effect of the bug was that timeouts during subsequent deliveries caused
3555 crashes instead of being properly handled. The handler is now left at its
3556 default (and expected) setting.
3558 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3559 message, again when deliver_drop_privilege is set or Exim is run as root.
3560 The bug described in (1) was not present in this case, but the tidying up
3561 of the other signals was missing. I have made the two cases consistent.
3563 3. The ignore_target_hosts setting on a manualroute router was being ignored
3564 for hosts that were looked up using the /MX notation.
3566 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3569 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3570 operated on the sender address. After changing the $sender_address to <>
3571 for the sender address verify, Exim was re-instated it as the original
3572 (before rewriting) address, but remembering that it had rewritten it, so it
3573 wasn't rewriting it again. This bug also had the effect of breaking the
3574 sender address verification caching when the sender address was rewritten.
3576 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3577 This has been changed so that if the ip literal address matches
3578 ignore_target_hosts, the router declines.
3580 7. Added expansion conditions match_domain, match_address, and match_local_
3581 part (NOT match_host).
3583 8. The placeholder for the Received: header didn't have a length field set.
3585 9. Added code to Exim itself and to exim_lock to test for a specific race
3586 condition that could lead to file corruption when using MBX delivery. The
3587 issue is with the lockfile that is created in /tmp. If this file is removed
3588 after a process has opened it but before that process has acquired a lock,
3589 there is the potential for a second process to recreate the file and also
3590 acquire a lock. This could lead to two Exim processes writing to the file
3591 at the same time. The added code performs the same test as UW imapd; it
3592 checks after acquiring the lock that its file descriptor still refers to
3593 the same named file.
3595 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3596 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3599 11. Added the smtp_active_hostname option. If used, this will typically be made
3600 to depend on the incoming interface address. Because $interface_address is
3601 not set up until the daemon has forked a reception process, error responses
3602 that can happen earlier (such as "too many connections") no longer contain
3605 12. If an expansion in a condition on a "warn" statement fails because a lookup
3606 defers, the "warn" statement is abandoned, and the next ACL statement is
3607 processed. Previously this caused the whole ACL to be aborted.
3609 13. Added the iplsearch lookup type.
3611 14. Added ident_timeout as a log selector.
3613 15. Added tls_certificate_verified as a log selector.
3615 16. Added a global option tls_require_ciphers (compare the smtp transport
3616 option of the same name). This controls incoming TLS connections.
3618 17. I finally figured out how to make tls_require_ciphers do a similar thing
3619 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3620 before starting the TLS session.
3622 18. Tabs are now shown as \t in -bP output.
3624 19. If the log selector return_path_on_delivery was set, Exim crashed when
3625 bouncing a message because it had too many Received: header lines.
3627 20. If two routers both had headers_remove settings, and the first one included
3628 a superfluous trailing colon, the final name in the first list and the
3629 first name in the second list were incorrectly joined into one item (with a
3630 colon in the middle).
3636 1. Added -C and -D options to the exinext utility, mainly to make it easier
3637 to include in the automated testing, but these could be helpful when
3638 multiple configurations are in use.
3640 2. The exinext utility was not formatting the output nicely when there was
3641 an alternate port involved in the retry record key, nor when there was a
3642 message id as well (for retries that were specific to a specific message
3643 and a specific host). It was also confused by IPv6 addresses, because of
3644 the additional colons they contain. I have fixed the IPv4 problem, and
3645 patched it up to do a reasonable job for IPv6.
3647 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3648 delivery, the log line now contains "pipelined" if PIPELINING was used.
3650 4. An SMTP transport process used to panic and die if the bind() call to set
3651 an explicit outgoing interface failed. This has been changed; it is now
3652 treated in the same way as a connect() failure.
3654 5. A reference to $sender_host_name in the part of a conditional expansion
3655 that was being skipped was still causing a DNS lookup. This no longer
3658 6. The def: expansion condition was not recognizing references to header lines
3659 that used bh_ and bheader_.
3661 7. Added the _cache feature to named lists.
3663 8. The code for checking quota_filecount in the appendfile transport was
3664 allowing one more file than it should have been.
3666 9. For compatibility with Sendmail, the command line option
3674 and sets the incoming protocol and host name (for trusted callers). The
3675 host name and its colon can be omitted when only the protocol is to be set.
3676 Note the Exim already has two private options, -pd and -ps, that refer to
3677 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3678 "s", but I don't think that's a major issue.
3680 10. A number of refactoring changes to the code, none of which should affect
3683 (a) The number of logging options was getting close to filling up the
3684 32-bit word that was used as a bit map. I have split them into two classes:
3685 those that are passed in the argument to log_write(), and those that are
3686 only ever tested independently outside of that function. These are now in
3687 separate 32-bit words, so there is plenty of room for expansion again.
3688 There is no change in the user interface or the logging behaviour.
3690 (b) When building, for example, log lines, the code previously used a
3691 macro that called string_cat() twice, in order to add two strings. This is
3692 not really sufficiently general. Furthermore, there was one instance where
3693 it was actually wrong because one of the argument was used twice, and in
3694 one call a function was used. (As it happened, calling the function twice
3695 did not affect the overall behaviour.) The macro has been replaced by a
3696 function that can join an arbitrary number of extra strings onto a growing
3699 (c) The code for expansion conditions now uses a table and a binary chop
3700 instead of a serial search (which was left over from when there were very
3701 few conditions). Also, it now recognizes conditions like "pam" even when
3702 the relevant support is not compiled in: a suitably worded error message is
3703 given if an attempt is made to use such a condition.
3705 11. Added ${time_interval:xxxxx}.
3707 12. A bug was causing one of the ddress fields not to be passed back correctly
3708 from remote delivery subprocesses. The field in question was not being
3709 subsequently used, so this caused to problems in practice.
3711 13. Added new log selectors queue_time and deliver_time.
3713 14. Might have fixed a bug in maildirsizefile handling that threw up
3714 "unexpected character" debug warnings, and recalculated the data
3715 unnecessarily. In any case, I expanded the warning message to give more
3718 15. Added the message "Restricted characters in address" to the statements in
3719 the default ACL that block characters like @ and % in local parts.
3721 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3722 Three changes have been made:
3724 (a) There was a serious bug; a negative response to MAIL caused the whole
3725 recipient domain to be cached as invalid, thereby blocking all messages
3726 to all local parts at the same domain, from all senders. This bug has
3727 been fixed. The domain is no longer cached after a negative response to
3728 MAIL if the sender used is not empty.
3730 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3733 (c) A new callout option, "use_sender" has been added for people who want
3734 the modified behaviour.
3740 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3743 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3744 indeed breaks things for older releases.
3746 3. Added additional logging to the case where there is a problem reading data
3747 from a filter that is running in a subprocess using a pipe, in order to
3748 try to track down a specific problem.
3750 4. Testing facility fudge: when running in the test harness and attempting
3751 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3752 getting "No route to host". Convert this to a timeout.
3754 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3757 6. Some OS don't have socklen_t but use size_t instead. This affects the
3758 fifth argument of getsockopt() amongst other things. This is now
3759 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3760 can be set for individual OS. I have set it for SunOS5, OSF1, and
3761 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3762 some earlier ones do not.
3764 7. Change 4.30/15 was not doing the test caselessly.
3766 8. The standard form for an IPv6 address literal was being rejected by address
3767 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3768 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3769 this, as well as the form without the "IPv6" on the front (but only when
3770 address literals are enabled, of course).
3772 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3774 10. Exim crashed if a message with an empty sender address specified by -f
3775 encountered a router with an errors_to setting. This could be provoked only
3776 by a command such as
3780 where an empty string was supplied; "<>" did not hit this bug.
3782 11. Installed PCRE release 4.5.
3784 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3785 remained set. It is now erased.
3787 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3788 times from message ids (which are base 36 rather than the normal 62).
3790 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3791 were being counted as actual protocol errors, and logged if the log
3792 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3793 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3794 and DATA following a set of rejected RCPTs do not count as protocol errors.
3795 In other words, Exim assumes they were pipelined, though this may not
3796 actually be the case. Of course, in all cases the client gets an
3797 appropriate error code.
3799 15. If a lookup fails in an ACL condition, a message about the failure may
3800 be available; it is used if testing the ACL cannot continue, because most
3801 such messages specify what the cause of the deferral is. However, some
3802 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3803 that caused an old message to be retained and used if a later statement
3804 caused a defer, replacing the real cause of the deferral.
3806 16. If an IP address had so many PTR records that the DNS lookup buffer
3807 was not large enough to hold them, Exim could crash while trying to process
3808 the truncated data. It now detects and logs this case.
3810 17. Further to 4.21/58, another change has been made: if (and only if) the
3811 first line of a message (the first header line) ends with CRLF, a bare LF
3812 in a subsequent header line has a space inserted after it, so as not to
3813 terminate the header.
3815 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3816 unnecessarily, used atoi() instead of strtol(), and didn't check the
3817 termination when getting file sizes from file names by regex.
3819 19. Completely re-implemented the support for maildirsize files, in the light
3820 of a number of problems with the previous contributed implementation
3821 (4.30/29). In particular:
3823 . If the quota is zero, the maildirsize file is maintained, but no quota is
3826 . If the maildir directory does not exist, it is created before any attempt
3827 to write a maildirsize file.
3829 . The quota value in the file is just a cache; if the quota is changed in
3830 the transport, the new value overrides.
3832 . A regular expression is available for excluding directories from the
3835 20. The autoreply transport checks the characters in options that define the
3836 message's headers; it allows continued headers, but it was checking with
3837 isspace() after an embedded newline instead of explicitly looking for a
3840 21. If all the "regular" hosts to which an address was routed had passed their
3841 expiry times, and had not reached their retry times, the address was
3842 bounced, even if fallback hosts were defined. Now Exim should go on to try
3845 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3846 equivalent code in the SMTP transport. Some hosts send humungous responses
3847 to HELO/EHLO, more than 1024 it seems.
3849 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3850 gives compiler warnings in some environments. I've now done it "properly",
3853 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3854 (because of problems with the built-in one) was declared to return uschar *
3855 instead of char *, causing compiler failure.
3857 25. Fixed a file descriptor leak when processing alias/forward files.
3859 26. Fixed a minor format string issue in dbfn.c.
3861 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3863 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3864 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3867 29. When a sender address is verified, it is cached, to save repeating the test
3868 when there is more than one recipient in a message. However, when the
3869 verification involves a callout, it is possible for different callout
3870 options to be set for different recipients. It is too complicated to keep
3871 track of this in the cache, so now Exim always runs a verification when a
3872 callout is required, relying on the callout cache for the optimization.
3873 The overhead is duplication of the address routing, but this should not be
3876 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3877 to be verified with callout=postmaster, and the main callout worked but the
3878 postmaster check failed, the verification correctly failed. However, if a
3879 subsequent RCPT command asked for sender verification *without* the
3880 postmaster check, incorrect caching caused this verification also to fail,
3883 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3884 it was not caching the DNS options (qualify_single, search_parents) that
3885 were used when the lookup failed. A subsequent lookup with different
3886 options therefore always gave the same answer, though there were cases
3887 where it should not have. (Example: a "domains = !$mx_any" option on a
3888 dnslookup router: the "domains" option is always processed without any
3889 widening, but the router might have qualify_single set.) Now Exim uses the
3890 cached value only when the same options are set.
3892 32. Added John Jetmore's "exipick" utility to the distribution.
3894 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3895 than a timeout (e.g. a certificate is required, and is not provided), an
3896 Exim server now closes the connection immediately. Previously it waited for
3897 the client to close - but if the client is SSL, it seems that they each
3898 wait for each other, leading to a delay before one of them times out.
3900 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3901 maintained 0.8.x compatibility because I don't think many are using it, and
3902 it is clearly obsolete.
3904 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3907 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3908 client certificate was expired. A simple patch fixes this, though I don't
3909 understand the full logic of why the verify callback is called multiple
3912 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3913 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3914 which causes problems with some clients (such as the Certicom SSL Plus
3915 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3916 disables the coutermeasure allowing Eudora to connect."
3918 38. Exim was not checking that a write() to a log file succeeded. This could
3919 lead to Bad Things if a log got too big, in particular if it hit a file
3920 size limit. Exim now panics and dies if it cannot write to a log file, just
3921 as it does if it cannot open a log file.
3923 39. Modified OS/Makefile-Linux so that it now contains
3925 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3927 The two -D definitions ensure that Exim is compiled with large file
3928 support, which makes it possible to handle log files that are bigger than
3931 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3932 instance) a domain was checked against a named list that involved a lookup,
3933 causing $domain_data to be set, then another domain was checked against the
3934 same list, then the first domain was re-checked, the value of $domain_data
3935 after the final check could be wrong. In particular, if the second check
3936 failed, it could be set empty. This bug probably also applied to
3939 41. The strip_trailing_dot option was not being applied to the address given
3940 with the -f command-line option.
3942 42. The code for reading a message's header from the spool was incrementing
3943 $received_count, but never initializing it. This meant that the value was
3944 incorrect (doubled) while delivering a message in the same process in which
3945 it was received. In the most common configuration of Exim, this never
3946 happens - a fresh exec is done - but it can happen when
3947 deliver_drop_privilege is set.
3949 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3950 it now includes up to 150 characters of the unexpected data in the log
3953 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3954 and building data strings. The size of both of these buffers was 10 000
3955 bytes - far larger than anybody would *ever* want, thought I. Needless to
3956 say, somebody hit the limit. I have increased the maximum line length to
3957 20 000 and the maximum data length of concatenated lines to 100 000. I have
3958 also fixed two bugs, because there was no checking on these buffers. Tsk,
3959 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3960 buffer is too small.
3962 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3963 lsearch lookups. Now it does.
3965 46. When parsing a route_list item in a manualroute router, a fixed-length
3966 buffer was used for the list of hosts. I made this 1024 bytes long,
3967 thinking that nobody would ever have a list of hosts that long. Wrong.
3968 Somebody had a whole pile of complicated expansion conditions, and the
3969 string was silently truncated, leading to an expansion error. It turns out
3970 that it is easier to change to an unlimited length (owing to other changes
3971 that have happened since this code was originally written) than to build
3972 structure for giving a limitation error. The length of the item that
3973 expands into the list of hosts is now unlimited.
3975 47. The lsearch lookup could not handle data where the length of text line was
3976 more than 4095 characters. Such lines were truncated, leading to shortened
3977 data being returned. It should now handle lines of any length.
3979 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3980 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3983 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3984 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3985 no longer happens in comment lines. A list of replacements is now placed
3986 at the head of all of the source files, except those whose only change is
3987 to replace PERL_COMMAND in the very first #! line.
3989 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3990 messages on the queue, with a bottom-up merge sort, using code contributed
3991 by Michael Haardt. This should make operations like -bp somewhat faster on
3992 large queues. It won't affect queue runners, except when queue_run_in_order
3995 51. Installed eximstats 1.31 in the distribution.
3997 52. Added support for SRV lookups to the dnslookup router.
3999 53. If an ACL referred to $message_body or $message_body_end, the value was not
4000 reset for any messages that followed in the same SMTP session.
4002 54. The store-handling optimization for building very long strings was not
4003 differentiating between the different store pools. I don't think this
4004 actually made any difference in practice, but I've tidied it.
4006 55. While running the routers to verify a sender address, $sender_address
4007 was still set to the sender address. This is wrong, because when routing to
4008 send a bounce to the sender, it would be empty. Therefore, I have changed
4009 it so that, while verifying a sender address, $sender_address is set to <>.
4010 (There is no change to what happens when verifying a recipient address.)
4012 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4013 target A or AAAA records (if not already returned) without resetting the
4014 qualify_single or search_parents options of the DNS resolver. These are
4015 inappropriate in this case because the targets of MX and SRV records must
4016 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4017 target that, when qualified, matched something in the local domain. These
4018 two options are now turned off when doing these lookups.
4020 57. It seems that at least some releases of Reiserfs (which does not have the
4021 concept of a fixed number of inodes) returns zero and not -1 for the
4022 number of available inodes. This interacted badly with check_spool_inodes,
4023 which assumed that -1 was the "no such thing" setting. What I have done is
4024 to check that the total number of inodes is greater than zero before doing
4025 the test of how many are available.
4027 58. When a "warn" ACL statement has a log_message modifier, the message is
4028 remembered, and not repeated. This is to avoid a lot of repetition when a
4029 message has many recipients that cause the same warning to be written.
4030 Howewer, Exim was preserving the list of already written lines for an
4031 entire SMTP session, which doesn't seem right. The memory is now reset if a
4032 new message is started.
4034 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4035 debugging output unless log_rewrite was also set.
4037 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4038 of (int)(handle) when we know that handle contains (void *)(-1).
4040 61. The Exim daemon panic-logs an error return when it closes the incoming
4041 connection. However "connection reset by peer" seems to be common, and
4042 isn't really an error worthy of noting specially, so that particular error
4045 62. When Exim is trying to find all the local interfaces, it used to panic and
4046 die if the ioctl to get the interface flags failed. However, it seems that
4047 on at least one OS (Solaris 9) it is possible to have an interface that is
4048 included in the list of interfaces, but for which you get a failure error
4049 for this call. This happens when the interface is not "plumbed" into a
4050 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4051 failure of the "get flags" call assumes that the interface is down.
4053 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4054 makes life easier for people who are doing arithmetic on fields extracted
4055 from dates, where you often get leading zeros that should not be
4056 interpreted as octal.
4058 64. Added qualify_domain to the redirect router, to override the global
4061 65. If a pathologically long header line contained very many addresses (the
4062 report of this problem mentioned 10 000) and each of them was rewritten,
4063 Exim could use up a very large amount of memory. (It kept on making new
4064 copies of the header line as it rewrote, and never released the old ones.)
4065 At the expense of a bit more processing, the header rewriting function has
4066 been changed so that it no longer eats memory in this way.
4068 66. The generation of the Received: header has been moved from the time that a
4069 message starts to be received, to the time that it finishes. The timestamp
4070 in the Received: header should now be very close to that of the <= log
4071 line. There are two side-effects of this change:
4073 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4074 logged header lines no longer include the local Received: line, because
4075 it has not yet been created. The same applies to a copy of the message
4076 that is returned to a non-SMTP sender when a message is rejected.
4078 (b) When a filter file is tested using -bf, no additional Received: header
4079 is added to the test message. After some thought, I decided that this
4082 This change does not affect the value of $received_for. It is still set
4083 after address rewriting, but before local_scan() is called.
4085 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4087 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4088 gave an unhelpful panic error message, and a defer error. I have managed to
4089 change this behaviour so that it now rejects any supplied certificate,
4090 which seems right, as the list of acceptable certificates is empty.
4092 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4093 gave an unhelpful defer error. I have not managed to make this reject any
4094 supplied certificates, but the error message it gives is "no certificate
4095 supplied", which is not helpful.
4097 70. exigrep's output now also includes lines that are not associated with any
4098 message, but which match the given pattern. Implemented by a patch from
4099 Martin Sluka, which also tidied up the Perl a bit.
4101 71. Recipient callout verification, like sender verification, was using <> in
4102 the MAIL FROM command. This isn't really the right thing, since the actual
4103 sender may affect whether the remote host accepts the recipient or not. I
4104 have changed it to use the actual sender in the callout; this means that
4105 the cache record is now keyed on a recipient/sender pair, not just the
4106 recipient address. There doesn't seem to be a real danger of callout loops,
4107 since a callout by the remote host to check the sender would use <>.
4108 [SEE ABOVE: changed after hitting problems.]
4110 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4111 temporary errors. However, in the case of such a code being given after
4112 the end of a data transmission (i.e. after ".") Exim was failing to write
4113 a retry record for the message. (Yes, there was some broken host that was
4114 actually sending 8xx at this point.)
4116 73. An unknown lookup type in a host list could cause Exim to panic-die when
4117 the list was checked. (An example that provoked this was putting <; in the
4118 middle of a list instead of at the start.) If this happened during a DATA
4119 ACL check, a -D file could be left lying around. This kind of configuration
4120 error no longer causes Exim to die; instead it causes a defer errror. The
4121 incident is still logged to the main and panic logs.
4123 74. Buglet left over from Exim 3 conversion. The message "too many messages
4124 in one connection" was written to the rejectlog but not the mainlog, except
4125 when address rewriting (yes!) was being logged.
4127 75. Added write_rejectlog option.
4129 76. When a system filter was run not as root (that is, when system_filter_user
4130 was set), the values of the $n variables were not being returned to the
4131 main process; thus, they were not subsequently available in the $sn
4134 77. Added +return_path_on_delivery log selector.
4136 78. A connection timeout was being treated differently from recipients deferred
4137 when testing hosts_max_try with a message that was older than the host's
4138 retry timeout. (The host should not be counted, thus allowing all hosts to
4139 be tried at least once before bouncing.) This may have been the cause of an
4140 occasionally reported bug whereby a message would remain on the queue
4141 longer than the retry timeout, but would be bounced if a delivery was
4142 forced. I say "may" because I never totally pinned down the problem;
4143 setting up timeout/retry tests is difficult. See also the next item.
4145 79. The ultimate address timeout was not being applied to errors that involved
4146 a combination of host plus message (for example, a timeout on a MAIL
4147 command). When an address resolved to a number of possible hosts, and they
4148 were not all tried for each delivery (e.g. because of hosts_max_try), a
4149 message could remain on the queue longer than the retry timeout.
4151 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4154 81. Fixed an obscure SMTP outgoing bug which required at least the following
4155 conditions: (a) there was another message waiting for the same server;
4156 (b) the server returned 5xx to all RCPT commands in the first message so
4157 that the message was not completed; (c) the server dropped the connection
4158 or gave a negative response to the RSET that Exim sends to abort the
4159 transaction. The observed case was a dropped connection after DATA that had
4160 been sent in pipelining mode. That is, the server had advertised PIPELINING
4161 but was not implementing it correctly. The effect of the bug was incorrect
4162 behaviour, such as trying another host, and this could lead to a crash.
4168 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4169 and daemon.c were passed as pointers to ints; they should have been
4170 pointers to socklen_t variables (which are typically unsigned ints).
4172 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4175 3. Fixed a really odd bug that affected only the testing scheme; patching a
4176 certain fixed string in the binary changed the value of another string that
4177 happened to be identical to the end of the original first string.
4179 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4180 name", it returns that address as the IP address. On some operating
4181 systems (e.g. Solaris), it also passes back the IP address string as the
4182 "host name". However, on others (e.g. Linux), it passes back an empty
4183 string. Exim wasn't checking for this, and was changing the host name to an
4184 empty string, assuming it had been canonicized.
4186 5. Although rare, it is permitted to have more than one PTR record for a given
4187 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4188 all the names associated with an address, because they do in Solaris.
4189 However, it seems that they do not in Linux for data that comes from the
4190 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4191 I found this out when I moved to a new Linux workstation and tried to run
4192 the Exim test suite.
4194 To get round this problem I have changed the code so that it now does its
4195 own call to the DNS to look up PTR records when searching for a host name.
4196 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4197 addresses that are only in /etc/hosts are still found.
4199 This behaviour is, however, controlled by an option called host_lookup_
4200 order, which defaults to "bydns:byaddr". If people want to use the other
4201 order, or indeed, just use one or the other means of lookup, they can
4202 specify it in this variable.
4204 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4205 some operating systems, this comes back from gethostbyaddr() as an empty
4206 string, and this is what Exim used to test for. However, it seems that in
4207 other systems, "." is yielded. Exim now tests for this case too.
4209 7. The values of check_spool_space and check_log_space are now held internally
4210 as a number of kilobytes instead of an absolute number of bytes. If a
4211 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4212 kilobyte. This means that much larger values can be stored.
4214 8. Exim monitor: an attempt to get the action menu when not actually pointing
4215 at a message produces an empty menu entitled "No message selected". This
4216 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4217 no entries in it ("Shell widget menu has zero width and/or height"). So I
4218 have added a single, blank menu entry in this case.
4220 9. Added ${quote_local_part.
4222 10. MIME decoding is now applied to the contents of Subject: header lines when
4225 11. Now that a reference to $sender_host_address automatically causes a reverse
4226 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4227 host lookup before query-style lookups in lists that might use this
4228 variable. This has therefore been abolished, and the "net-" prefix is no
4229 longer necessary for query-style lookups.
4231 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4232 have been a typo for LFLAGS, so it has been changed.
4234 13. The install script calls Exim with "-C /dev/null" in order to find the
4235 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4236 to be output. Howeve, since Exim outputs its version number before the
4237 error, it didn't break the script. It just looked ugly. I fixed this by
4238 always allowing "-C /dev/null" if the caller is root.
4240 14. Ignore overlarge ACL variable number when reading spool file - insurance
4241 against a later release with more variables having written the file.
4243 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4244 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4245 this, as well as the form without the "IPv6" on the front.
4247 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4248 OS/Makefile-Darwin file.
4250 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4251 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4253 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4254 variable. However, some OS use ints for inodes. I've added cast to long int
4255 to get rid of the compiler warning.
4257 19. I had forgotten to lock out "/../" in configuration file names when
4258 ALT_CONFIG_PREFIX was set.
4260 20. Routers used for verification do not need to specify transports. However,
4261 if such a router generated a host list, and callout was configured, Exim
4262 crashed, because it could not find a port number from the (non-existent)
4263 transport. It now assumes port 25 in this circumstance.
4265 21. Added the -t option to exigrep.
4267 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4268 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4269 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4270 them is set, LOOKUP_LSEARCH is forced.
4272 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4274 24. Added sender and host information to the "rejected by local_scan()" log
4275 line; previously there was no indication of these.
4277 25. Added .include_if_exists.
4279 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4280 Linux. It turns out that not all file systems support this. Apparently some
4281 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4282 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4283 not supported on the file descriptor, is now ignored when Exim is trying to
4284 sync a directory. This applies only to Linux.
4286 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4288 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4289 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4292 29. Added support for maildirsize files from supplied patch (modified a bit).
4294 30. The use of :fail: followed by an empty string could lead Exim to respond to
4295 sender verification failures with (e.g.):
4297 550 Verification failed for <xxx>
4298 550 Sender verify failed
4300 where the first response line was missing the '-' that indicates it is not
4301 the final line of the response.
4303 31. The loop for finding the name of the user that called Exim had a hardwired
4304 limit of 10; it now uses the value of finduser_retries, which is used for
4305 all other user lookups.
4307 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4310 33. Exim was neglecting to zero errno before one call of strtol() when
4311 expanding a string and expecting an integer value. On some systems this
4312 resulted in spurious "integer overflow" errors. Also, it was casting the
4313 result into an int without checking.
4315 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4316 did not work. The code looks as if it has *never* worked, though it appears
4317 to have been documented since at least releast 1.62. I have made it work.
4319 35. The "timeout_DNS" error in retry rules, also documented since at least
4320 1.62, also never worked. As it isn't clear exactly what this means, and
4321 clearly it isn't a major issue, I have abolished the feature by treating it
4322 as "timeout", and writing a warning to the main and panic logs.
4324 36. The display of retry rules for -brt wasn't always showing the error code
4327 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4328 timeout_connect_A, timeout_connect_MX.
4330 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4331 to the empty sender.
4333 39. The daemon was not analysing the content of -oX till after it had closed
4334 stderr and disconnected from the controlling terminal. This meant that any
4335 syntax errors were only noted on the panic log, and the return code from
4336 the command was 0. By re-arranging the code a little, I've made the
4337 decoding happen first, so such errors now appear on stderr, and the return
4338 code is 1. However, the actual setting up of the sockets still happens in
4339 the disconnected process, so errors there are still only recorded on the
4342 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4343 connections (as happens on some IP stacks) was logged at start up time as
4344 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4345 it from "IPv6 and IPv4", which means that two separate sockets are being
4348 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4349 says whether AF_INET or AF_INET6 was passed as an argument.
4351 42. Exiwhat output was messed up when time zones were included in log
4354 43. Exiwhat now gives more information about the daemon's listening ports,
4355 and whether -tls-on-connect was used.
4357 44. The "port" option of the smtp transport is now expanded.
4359 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4360 silently ignored. Now an error message is written to the main and panic
4363 46. There's a new ACL modifier called "logwrite" which writes to a log file
4364 as soon as it is encountered.
4366 47. Added $local_user_uid and $local_user_gid at routing time.
4368 48. Exim crashed when trying to verify a sender address that was being
4371 49. Exim was recognizing only a space character after ".include". It now also
4372 recognizes a tab character.
4374 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4375 extracting the relevant information from the specification. The man page no
4376 longer contains scrambled data for the -d option, and I've added a section
4377 at the front about calling Exim under different names.
4379 51. Added "extra_headers" argument to the "mail" command in filter files.
4381 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4384 53. Installed eximstats 1.29.
4386 54. Added transport_filter_timeout as a generic transport option.
4388 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4389 Cc: header lines. This was required by RFC 822, but it not required by RFC
4392 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4393 incoming messages that did not have them. Now it does so only if the
4394 message originates locally, that is, if there is no associated remote host
4395 address. When Resent- header lines are present, this applies to the Resent-
4396 lines rather than the non-Resent- lines.
4398 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4399 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4401 58. Messages for configuration errors now include the name of the main
4402 configuration file - useful now that there may be more than one file in a
4403 list (.included file names were always shown).
4405 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4406 for those rare installations that do not start the daemon as root or run it
4407 setuid root. I've cut out the call to initgroups() if the daemon is not
4410 60. The Exim user and group can now be bound into the binary as text strings
4411 that are looked up at the start of Exim's processing.
4413 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4415 62. Added $mailstore_basename variable.
4417 63. Installed patch to sieve.c from Michael Haardt.
4419 64. When Exim failed to open the panic log after failing to open the main log,
4420 the original message it was trying to log was written to stderr and debug
4421 output, but if they were not available (the usual case in production), it
4422 was lost. Now it is written to syslog before the two lines that record the
4423 failures to open the logs.
4425 65. Users' Exim filters run in subprocesses under the user's uid. It is
4426 possible for a "deliver" command or an alias in a "personal" command to
4427 provoke an address rewrite. If logging of address rewriting is configured,
4428 this fails because the process is not running as root or exim. There may be
4429 a better way of dealing with this, but for the moment (because 4.30 needs
4430 to be released), I have disabled address rewrite logging when running a
4431 filter in a non-root, non-exim process.
4437 1. The buildconfig auxiliary program wasn't quoting the value set for
4438 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4439 not defined. This bug was masked in 4.22 by the effect that was fixed in
4442 2. Some messages that were rejected after a message id was allocated were
4443 shown as "incomplete" by exigrep. It no longer does this for messages that
4444 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4446 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4447 have allow_domain_literals set, the ID did not get logged in the <= line.
4448 Domain literals are now always recognized in Message-ID: header lines.
4450 4. The first argument for a ${extract expansion item is the key name or field
4451 number. Leading and trailing spaces in this item were not being ignored,
4452 causing some misleading effects.
4454 5. When deliver_drop_privilege was set, single queue runner processes started
4455 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4456 same command in the process it spins off) were not dropping privilege.
4458 6. When the daemon running as "exim" started a queue runner, it always
4459 re-executed Exim in the spun-off process. This is a waste of effort when
4460 deliver_drop_privilege is set. The new process now just calls the
4461 queue-runner function directly.
4467 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4470 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4471 ignored. Though the use of -oP was forcing the writing of a pid file, it
4472 was always written to the default place.
4474 3. If the message "no IP address found for host xxxx" is generated during
4475 incoming verification, it is now followed by identification of the incoming
4476 connection (so you can more easily find what provoked it).
4478 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4480 5. Added some features to "harden" Exim a bit more against certain attacks:
4482 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4483 be put in Local/Makefile. This is like the never_users runtime option,
4484 but it cannot be overridden. The default setting is "root".
4486 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4487 prefix string with which any file named in a -C command line option
4490 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4491 is retained for -C and -D only if the caller of Exim is root. Without
4492 it, the exim user may also use -C and -D and retain privilege.
4494 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4495 command line option is disabled.
4497 6. Macro names set by the -D option must start with an upper case letter, just
4498 like macro names defined in the configuration file.
4500 7. Added "dereference=" facility to LDAP.
4502 8. Two instances of the typo "uknown" in the source files are fixed.
4504 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4505 the Configure-Makefile script screwed up while processing it.
4507 10. Incorporated PCRE 4.4.
4509 11. The SMTP synchronization check was not operating right at the start of an
4510 SMTP session. For example, it could not catch a HELO sent before the client
4511 waited for the greeting. There is now a check for outstanding input at the
4512 point when the greeting is written. Because of the duplex, asynchronous
4513 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4514 way, but not yet received, when the check is performed.
4516 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4517 on TCP/IP sockets, because this apparently causes some broken clients to
4520 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4521 unchanged) from the Cygwin maintainer.
4523 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4524 was supported instead of testing for mbx. Effectively a typo.
4526 15. The spa authenticator server code was not checking that the input it
4527 received was valid base64.
4529 16. The debug output line for the "set" modifier in ACLs was not showing the
4530 name of the variable that was being set.
4532 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4534 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4535 lookup on its own. Something else was needed to trigger the lookup. For
4536 example, a match in host_lookup or the need for a host name in a host list.
4537 Now, if $sender_host_name is referenced and the host name has not yet been
4538 looked up, a lookup is performed. If the lookup fails, the variable remains
4539 empty, and $host_lookup_failed is set to "1".
4541 19. Added "eqi" as a case-independent comparison operator.
4543 20. The saslauthd authentication condition could segfault if neither service
4544 nor realm was specified.
4546 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4547 error message that was logged was misleading, and incoming SMTP
4548 connections were dropped. The message is now more accurate, and temporary
4549 errors are given to SMTP connections.
4551 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4552 (except RSET) with a 421 error, until QUIT is received. However, it was
4553 failing to send a response to QUIT.
4555 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4556 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4557 ACL is now run after the helo_try_verify_hosts code.
4559 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4560 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4561 case-independent, so other case variants are also recognized). Apparently
4562 some systems use these upper case variants.
4564 25. If more than two messages were waiting for the same host, and a transport
4565 filter was specified for the transport, Exim sent two messages over the
4566 same TCP/IP connection, and then failed with "socket operation on non-
4567 socket" when it tried to send the third.
4569 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4571 27. The extern definition of crypt16() in expand.c was not being excluded when
4572 the OS had its own crypt16() function.
4574 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4575 as a preferred synonym for return_size_limit, both as an option and as an
4578 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4580 30. Changed the default configuration ACL to relax the local part checking rule
4581 for addresses that are not in any local domains. For these addresses,
4582 slashes and pipe symbols are allowed within local parts, but the sequence
4583 /../ is explicitly forbidden.
4585 31. SPA server authentication was not clearing the challenge buffer before
4588 32. log_message in a "warn" ACL statement was writing to the reject log as
4589 well as to the main log, which contradicts the documentation and doesn't
4590 seem right (because no rejection is happening). So I have stopped it.
4592 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4593 However, I am unable to do any testing of this.
4595 34. Fixed an infelicity in the appendfile transport. When checking directories
4596 for a mailbox, to see if any needed to be created, it was accidentally
4597 using path names with one or more superfluous leading slashes; tracing
4598 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4600 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4601 contents are added to the log line that is written for every discarded
4602 recipient. (Previously a log_message setting was ignored.)
4604 36. The ${quote: operator now quotes the string if it is empty.
4606 37. The install script runs exim in order to find its version number. If for
4607 some reason other than non-existence or emptiness, which it checks, it
4608 could not run './exim', it was installing it with an empty version number,
4609 i.e. as "exim-". This error state is now caught, and the installation is
4612 38. An argument was missing from the function that creates an error message
4613 when Exim fails to connect to the socket for saslauthd authentication.
4614 This could cause Exim to crash, or give a corrupted message.
4616 39. Added isip, isip4, and isip6 to ${if conditions.
4618 40. The ACL variables $acl_xx are now saved with the message, and can be
4619 accessed later in routers, transports, and filters.
4621 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4622 strings in the file are not string-expanded.
4624 42. If a MAIL command specified a SIZE value that was too large to fit into an
4625 int variable, the check against message_size_limit failed. Such values are
4626 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4627 day this will have to be increased, but I don't think I want to be around
4628 when emails are that large.
4635 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4636 iconv() is not standard in FreeBSD.
4638 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4639 IPv6 enabled. The observed symptom was a segmentation fault on return from
4640 the function os_common_find_running_interfaces() in src/os.c.
4642 3. In the check_special_case() function in daemon.c I had used "errno" as an
4643 argument name, which causes warnings on some systems. This was basically a
4644 typo, since it was named "eno" in the comments!
4646 4. The code that waits for the clock to tick (at a resolution of some fraction
4647 of a second) so as to ensure message-id uniqueness was always waiting for
4648 at least one whole tick, when it could have waited for less. [This is
4649 almost certainly not relevant at current processor speeds, where it is
4650 unlikely to ever wait at all. But we try to future-proof.]
4652 5. The function that sleeps for a time interval that includes fractions of a
4653 second contained a race. It did not block SIGALRM between setting the
4654 timer, and suspending (a couple of lines later). If the interval was short
4655 and the sigsuspend() was delayed until after it had expired, the suspension
4656 never ended. On busy systems this could lead to processes getting stuck for
4659 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4660 process, before it forks any delivery processes. The open lookup caching
4661 mechanism meant that the open file or database connection was passed into
4662 the delivery process. The problem was that delivery processes always tidy
4663 up cached lookup data. This could cause a problem for the next delivery
4664 process started by the queue runner, because the external queue runner
4665 process does not know about the closure. So the next delivery process
4666 still has data in the lookup cache. In the case of a file lookup, there was
4667 no problem because closing a file descriptor in a subprocess doesn't affect
4668 the parent. However, if the lookup was caching a connection to a database,
4669 the connection was closed, and the second delivery process was likely to
4670 see errors such as "PGSQL: query failed: server closed the connection
4671 unexpectedly". The problem has been fixed by closing all cached lookups
4672 in a queue runner before running a delivery process.
4674 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4675 seem to have the "const" qualifier which it has on other OS. I've
4678 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4679 *of the same type* (client or server) with the same public name that an
4680 error should be diagnosed.
4682 9. When Exim looked up a host name for an IP address, but failed to find the
4683 original IP address when looking up the host name (a safety check), it
4684 output the message "<ip address> does not match any IP for NULL", which was
4685 confusing, to say the least. The bug was that the host name should have
4686 appeared instead of "NULL".
4688 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4689 user that is built into the binary, and the -C or -D options is used, root
4690 privilege is dropped before the configuration file is read. In addition,
4691 logging is switched to stderr instead of the normal log files. If the
4692 configuration then re-defines the Exim user, the unprivileged environment
4693 is probably not what is expected, so Exim logs a panic warning message (but
4696 However, if deliver_drop_privilege is set, the unprivileged state may well
4697 be exactly what is intended, so the warning has been cut out in that case,
4698 and Exim is allowed to try to write to its normal log files.
4704 1. smtp_return_error_details was not giving details for temporary sender
4705 or receiver verification errors.
4707 2. Diagnose a configuration error if two authenticators have the same public
4710 3. Exim used not to create the message log file for a message until the first
4711 delivery attempt. This could be confusing when incoming messages were held
4712 for policy or load reasons. The message log file is now created at the time
4713 the message is received, and an initial "Received" line is written to it.
4715 4. The automatically generated man page for command line options had a minor
4716 bug that caused no ill effects; however, a more serious problem was that
4717 the procedure for building the man page automatically didn't always
4718 operate. Consequently, release 4.20 contains an out-of-date version. This
4719 shouldn't happen again.
4721 5. When building Exim with embedded Perl support, the script that builds the
4722 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4723 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4725 6. The freeze_tell option was not being used for messages that were frozen on
4726 arrival, either by an ACL or by local_scan().
4728 7. Added the smtp_incomplete_transaction log selector.
4730 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4731 was accepting AUTH without a new EHLO.
4733 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4734 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4737 10. Logging of TCP/IP connections (when configured) now happens in the main
4738 daemon process instead of the child process, so that the TCP/IP connection
4739 count is more accurate (but it can never be perfect).
4741 11. The use of "drop" in a nested ACL was not being handled correctly in the
4742 outer ACL. Now, if condition failure induced by the nested "drop" causes
4743 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4744 or "require"), the connection is dropped.
4746 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4747 that yield "discard" can now be used with an "accept" or a "discard" verb,
4748 but an error is generated for any others (because I can't see a useful way
4749 to define what should happen).
4751 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4752 are now processed in the same way as lines in the Exim configuration file.
4753 In particular, continuation lines are supported.
4755 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4757 15. Added -ti meaning -t -i.
4759 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4760 domains, and warn by logging if others are found.
4762 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4763 returned from GIFCONF when Exim is trying to find the list of interfaces on
4764 a host. The code in os.c has been modified to copy each ifreq to an aligned
4765 structure in all cases.
4767 Also, in some cases, the returned ifreq's were being copied to a 'struct
4768 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4769 means the last couple of bytes of an IPv6 address could be chopped if the
4770 ifreq contained only a normal sockaddr (14 bytes storage).
4772 18. Named domain lists were not supported in the hosts_treat_as_local option.
4773 An entry such as +xxxx was not recognized, and was treated as a literal
4776 19. Ensure that header lines added by a DATA ACL are included in the reject log
4777 if the ACL subsequently rejects the message.
4779 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4780 MD5 (which is deprecated).
4782 21. When testing a filter file using -bf, Exim was writing a message when it
4783 took the sender from a "From " line in the message, but it was not doing so
4784 when it took $return_path from a Return-Path: header line. It now does.
4786 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4787 with a valid header line field name (a series of printing characters
4788 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4790 23. Changed "disc" in the source to "disk" to conform to the documentation and
4791 the book and for uniformity.
4793 24. Ignore Sendmail's -Ooption=value command line item.
4795 25. When execve() failed while trying to run a command in a pipe transport,
4796 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4797 could be confused with a return value of 69 from the command itself. This
4798 has been changed to 127, the value the shell returns if it is asked to run
4799 a non-existent command. The wording for the related log line suggests a
4800 non-existent command as the problem.
4802 26. If received_header_text expands to an empty string, do not add a Received:
4803 header line to the message. (Well, it adds a token one on the spool, but
4804 marks it "old" so that it doesn't get used or transmitted.)
4806 27. Installed eximstats 1.28 (addition of -nt option).
4808 28. There was no check for failure on the call to getsockname() in the daemon
4809 code. This can fail if there is a shortage of resources on the system, with
4810 ENOMEM, for example. A temporary error is now given on failure.
4812 29. Contrary to the C standard, it seems that in some environments, the
4813 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4814 program. Exim now does this explicitly; it affects the formatting of
4815 timestamps using strftime().
4817 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4818 complaints. I've now initialized all the variables, to avoid this.
4820 32. Header lines added by a system filter were not being "seen" during
4821 transport-time rewrites.
4823 33. The info_callback() function passed to OpenSSL is set up with type void
4824 (*)(SSL *, int, int), as described somewhere. However, when calling the
4825 function (actually a macro) that sets it up, the type void(*)() is
4826 expected. I've put in a cast to prevent warnings from picky compilers.
4828 34. If a DNS black list lookup found a CNAME record, but there were no A
4829 records associated with the domain it pointed at, Exim crashed.
4831 35. If a DNS black list lookup returned more than one A record, Exim ignored
4832 all but the first. It now scans all returned addresses if a particular IP
4833 value is being sought. In this situation, the contents of the
4834 $dnslist_value variable are a list of all the addresses, separated by a
4837 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4838 to accept a host name and all its aliases if the forward lookup for any of
4839 them yielded the IP address of the incoming connection. Now it accepts only
4840 those names whose forward lookup yields the correct IP address. Any other
4841 names are discarded. This closes a loophole whereby a rogue DNS
4842 administrator could create reverse DNS records to break through a
4843 wildcarded host restriction in an ACL.
4845 37. If a user filter or a system filter that ran in a subprocess used any of
4846 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4847 the wrong values were passed to the pipe command ($thisaddress had the
4848 value of $0, $0 had the value of $1, etc). This bug was introduced by
4849 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4851 38. Improved the line breaking for long SMTP error messages from ACLs.
4852 Previously, if there was no break point between 40 and 75 characters, Exim
4853 left the rest of the message alone. Two changes have been made: (a) I've
4854 reduced the minimum length to 35 characters; (b) if it can't find a break
4855 point between 35 and 75 characters, it looks ahead and uses the first one
4856 that it finds. This may give the occasional overlong line, but at least the
4857 remaining text gets split now.
4859 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4860 file descriptors might be low, and that setting 1000 would always raise it.
4861 It turns out that in some environments, the limit is already over 1000 and
4862 that lowering it causes trouble. So now Exim takes care not to decrease it.
4864 40. When delivering a message, the value of $return_path is set to $sender_
4865 address at the start of routing (routers may change the value). By an
4866 oversight, this default was not being set up when an address was tested by
4867 -bt or -bv, which affected the outcome if any router or filter referred to
4870 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4871 log only when "message" or "log_message" are set. However, if one of the
4872 conditions was an address verification, or a call to a nested ACL, the
4873 messages generated by the underlying test were being passed through. This
4874 no longer happens. The underlying message is available in $acl_verify_
4875 message for both "message" and "log_message" expansions, so it can be
4876 passed through if needed.
4878 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4879 new expansion $bh_ to give the encoded byte string without charset
4880 translation. Translation happens only if iconv() is available; HAVE_ICONV
4881 indicates this at build time. HEADERS_CHARSET gives the charset to
4882 translate to; headers_charset can change it in the configuration, and
4883 "headers charset" can change it in an individual filter file.
4885 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4886 that creates RFC 2047 encoded "words" labels them as that charset instead
4887 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4888 expansion operator; (ii) when Exim creates a From: line for a local
4889 message; (iii) when a header line is rewritten to include a "phrase" part.
4891 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4892 buggy, causing it to skip the first lines of messages whose message ID
4893 ended in 'D'. This would not have bitten before Exim release 4.14, because
4894 message IDs were unlikely to end in 'D' before then. The effect was to have
4895 incorrect size information for certain domains.
4897 45. #include "config.h" was missing at the start of the crypt16.c module. This
4898 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4901 46. If there was a timeout during a "random" callout check, Exim treated it as
4902 a failure of the random address, and carried on sending RSET and the real
4903 address. If the delay was just some slowness somewhere, the response to the
4904 original RCPT would be taken as a response to RSET and so on, causing
4905 mayhem of various kinds.
4907 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4908 when I implemented it. It didn't allow for the fact that some option values
4909 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4910 the right test for positive values.
4912 48. Domain names in DNS records are case-independent. Exim always looks them up
4913 in lower case. Some resolvers return domain names in exactly the case they
4914 appear in the zone file, that is, they may contain uppercase letters. Not
4915 all resolvers do this - some return always lower case. Exim was treating a
4916 change of case by a resolver as a change of domain, similar to a widening
4917 of a domain abbreviation. This triggered its re-routing code and so it was
4918 trying to route what was effectively the same domain again. This normally
4919 caused routing to fail (because the router wouldn't handle the domain
4920 twice). Now Exim checks for this case specially, and just changes the
4921 casing of the domain that it ultimately uses when it transmits the message
4924 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4927 50. If a filter generated a file delivery with a non-absolute name (possible if
4928 no home directory exists for the router), the forbid_file option was not
4931 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4932 the existing equality matching.
4934 52. Exim was using ints instead of ino_t variables in some places where it was
4935 dealing with inode numbers.
4937 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4938 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4939 called TMPDIR, and if it finds it is different, it changes its value.
4941 54. The smtp_printf() function is now made available to local_scan() so
4942 additional output lines can be written before returning. There is also an
4943 smtp_fflush() function to enable the detection of a dropped connection.
4944 The variables smtp_input and smtp_batched_input are exported to
4947 55. Changed the default runtime configuration: the message "Unknown user"
4948 has been removed from the ACL, and instead placed on the localuser router,
4949 using the cannot_route_message feature. This means that any verification
4950 failures that generate their own messages won't get overridden. Similarly,
4951 the "Unrouteable address" message that was in the ACL for unverifiable
4952 relay addresses has also been removed.
4954 56. Added hosts_avoid_esmtp to the smtp transport.
4956 57. The exicyclog script was not checking for the esoteric option
4957 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4958 will work only if exicyclog is run under the appropriate euid.
4960 58. Following a discussion on the list, the rules by which Exim recognises line
4961 endings on incoming messages have been changed. The -dropcr and drop_cr
4962 options are now no-ops, retained only for backwards compatibility. The
4963 following line terminators are recognized: LF CRLF CR. However, special
4964 processing applies to CR:
4966 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4967 nor a local message in the state where . is a terminator.
4969 (ii) If a bare CR is encountered in a header line, an extra space is added
4970 after the line terminator so as not to end the header. The reasoning
4971 behind this is that bare CRs in header lines are most likely either
4972 to be mistakes, or people trying to play silly games.
4974 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4975 was being incorrectly given as 18 bytes larger than it should have been.
4976 This is a VOB (very old bug).
4978 60. This may never have affected anything current, but just in case it has:
4979 When the local host is found other than at the start of a list of hosts,
4980 the local host, those with the same MX, and any that follow, are discarded.
4981 When the list in question was part of a longer list of hosts, the following
4982 hosts (not currently being processed) were also being discarded. This no
4983 longer happens. I'm not sure if this situation could ever has previously
4986 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4989 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4990 header. This is something that is recommended in a new Internet Draft, and
4991 is something that is documented as being done by Sendmail. There are two
4992 possible values. For messages generated by the autoreply transport, Exim
4995 Auto-Submitted: auto-replied
4997 whereas for all other generated messages (e.g. bounces) it adds
4999 Auto-Submitted: auto-generated
5001 63. The "personal" condition in filters now includes a test for the
5002 Auto-Submitted: header. If it contains the string "auto-" the message it
5003 not considered personal.
5005 64. Added rcpt_include_affixes as a generic transport option.
5007 65. Added queue_only_override (default true).
5009 66. Added the syslog_duplication option.
5011 67. If what should have been the first header line of a message consisted of
5012 a space followed by a colon, Exim was mis-interpreting it as a header line.
5013 It isn't of course - it is syntactically invalid and should therefore be
5014 treated as the start of the message body. The misbehaviour could have
5015 caused a number of strange effects, including loss of data in subsequent
5016 header lines, and spool format errors.
5018 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5019 client host had authenticated. This control can now be exercised by an ACL
5020 for more flexibility.
5022 69. By default, callouts do not happen when testing with -bh. There is now a
5023 variant, -bhc, which does actually run the callout code, including
5024 consulting and updating the callout cache.
5026 70. Added support for saslauthd authentication, courtesy of Alexander
5029 71. If statvfs() failed on the spool or log directories while checking their
5030 size for availability, Exim confusingly gave the error "space shortage".
5031 Furthermore, in debugging mode it crashed with a floating point exception.
5032 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5033 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5034 serious problem, Exim now writes to the main and panic logs when this
5035 happens, with details of the failure. It then refuses to accept the
5036 incoming message, giving the message "spool directory problem" or "log
5037 directory problem" with a 421 code for SMTP messages.
5039 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5040 0, 1, and 2 exist, because some OS complain for execs without them (see
5041 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5042 descriptors. However, the code omitted to check that the open succeeded,
5043 causing mysterious errors if for some reason the permissions on /dev/null
5044 got screwed. Now Exim writes a message to the main and panic logs, and
5045 bombs out if it can't open /dev/null.
5047 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5048 interact so that it is all more flexible. It is supposed to remain
5049 backwards compatible. Also added extra_local_interfaces.
5051 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5052 to bomb out with an assertion failure - to the client this appears as a
5053 connection drop. This problem occurs in the part of the code that was taken
5054 from the Samba project. Fortunately, the assertion is in a very simple
5055 function, so I have fixed this by reproducing the function inline in the
5056 one place where it is called, and arranging for authentication to fail
5057 instead of killing the process with assert().
5059 75. The SPA client code was not working when the server requested OEM rather
5060 than Unicode encoding.
5062 76. Added code to make require_files with a specific uid setting more usable in
5063 the case where statting the file as root fails - usually a non-root-mounted
5064 NFS file system. When this happens and the failure is EACCES, Exim now
5065 forks a subprocess and does the per-uid checking as the relevant uid.
5067 77. Added process_log_path.
5069 78. If log_file_path was not explicitly set, a setting of check_log_space or
5070 check_log_inodes was ignored.
5072 79. If a space check for the spool or log partitions fails, the incident is now
5073 logged. Of course, in the latter case the data may get lost...
5075 80. Added the %p formatting code to string_format() so that it can be used to
5076 print addresses in debug_print(). Adjusted all the address printing in the
5077 debugging in store.c to use %p rather than %d.
5079 81. There was a concern that a line of code in smtp_in.c could overflow a
5080 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5081 initially expressed, the concern was not well-founded, because trailing
5082 spaces are removed early. However, if the trailing spaces were followed by
5083 a NULL, they did not get removed, so the overflow was possible. Two fixes
5086 (a) I re-wrote the offending code in a cleaner fashion.
5087 (b) If an incoming SMTP command contains a NULL character, it is rejected
5090 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5091 runs initgroups(), so that if the Exim user is in any additional groups,
5092 they will be used during message reception.
5098 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob