1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.608 2010/05/26 12:26:00 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 JJ/01 installed exipick 20100104.1, adding $max_received_linelength, $data_path, and $header_path variables; fixed documentation bugs and typos
11 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow exipick to access non-standard spools, including the "frozen" queue (Finput)
13 NM/01 Bugzilla 965: Support mysql stored procedures.
14 Patch from Alain Williams
16 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
18 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
19 Patch from Andreas Metzler
21 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
22 Patch from Kirill Miazine
24 NM/05 Bugzilla 671: Added umask to procmail example.
26 JJ/03 installed exipick 20100323.0, fixing doc bug
28 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
29 directory. Notification and patch from Dan Rosenberg
35 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body
37 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
39 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
41 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
43 NM/04 Bugzilla 915: Flag broken perl installation during build.
49 TK/01 Added patch by Johannes Berg that expands the main option
50 "spamd_address" if it starts with a dollar sign.
52 TK/02 Write list of recipients to X-Envelope-Sender header when building
53 the mbox-format spool file for content scanning (suggested by Jakob
56 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
57 (http://www.dcc-servers.net/) support via dccifd. Activated by
58 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
60 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
61 by Mark Daniel Reidel <mr@df.eu>.
63 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
64 When building exim an external PCRE library is now needed -
65 PCRE is a system library on the majority of modern systems.
66 See entry on PCRE_LIBS in EDITME file.
68 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
69 conversation. Added nologin parameter to request.
70 Patch contributed by Kirill Miazine
72 TF/01 Do not log submission mode rewrites if they do not change the address.
74 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
76 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
77 log files in place. Contributed by Roberto Lima
79 NM/04 Bugzilla 667: close socket used by dovecot authenticator
81 TF/03 Bugzilla 615: When checking the local_parts router precondition
82 after a local_part_suffix or local_part_prefix option, Exim now
83 does not use the address's named list lookup cache, since this
84 contains cached lookups for the whole local part.
86 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
87 Robert Millan. Documentation is in experimental-spec.txt
89 TF/04 Bugzilla 668: Fix parallel build (make -j).
91 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000
93 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
94 Patch provided by Jan Srzednicki
96 TF/05 Leading white space used to be stripped from $spam_report which
97 wrecked the formatting. Now it is preserved.
99 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
100 that they are available at delivery time.
102 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
104 TF/08 TLS error reporting now respects the incoming_interface and
105 incoming_port log selectors.
107 TF/09 Produce a more useful error message if an SMTP transport's hosts
108 setting expands to an empty string.
110 NM/06 Bugzilla 744: EXPN did not work under TLS.
111 Patch provided by Phil Pennock
113 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
114 Patch provided by Richard Godbee
116 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
117 acl_smtp_notquit, added index entry.
119 NM/09 Bugzilla 787: Potential buffer overflow in string_format
120 Patch provided by Eugene Bujak
122 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to accept()
123 Patch provided by Maxim Dounin
125 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
126 Patch provided by Phil Pennock
128 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
130 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
131 Patch provided by Brad "anomie" Jorsch
133 NM/14 Bugzilla 622: Added timeout setting to transport filter.
134 Patch provided by Dean Brooks
136 TK/05 Add native DKIM support (does not depend on external libraries).
138 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
139 Patch provided by Graeme Fowler
141 NM/16 Bugzilla 851: Documentation example syntax fix.
143 NM/17 Changed NOTICE file to remove references to embedded PCRE.
145 NM/18 Bugzilla 894: Fix issue with very long lines including comments in lsearch
147 NM/19 Bugzilla 745: TLS version reporting
148 Patch provided by Phil Pennock
150 NM/20 Bugzilla 167: bool: condition support
151 Patch provided by Phil Pennock
153 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken clients
154 Patch provided by Phil Pennock
156 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date
157 Patch provided by Brad "anomie" Jorsch
159 NM/23 Bugzilla 687: Fix misparses in eximstats
160 Patch provided by Heiko Schlittermann
162 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid
163 Patch provided by Heiko Schlittermann
165 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file
166 plus update to original patch.
168 NM/26 Bugzilla 799: Documentation correction for ratelimit
170 NM/27 Bugzilla 802: Improvements to local interface IP addr detection
171 Patch provided by David Brownlee
173 NM/28 Bugzilla 807: Improvements to LMTP delivery logging
175 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes
177 NM/30 Bugzilla 888: TLS documentation bugfixes
179 NM/31 Bugzilla 896: Dovecot buffer overrun fix
181 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
182 Unlike the original bugzilla I have changed all shell scripts in src tree
184 NM/33 Bugzilla 898: Transport filter timeout fix
185 Patch by Todd Rinaldo
187 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches
188 Patch by Serge Demonchaux
190 NM/35 Bugzilla 39: Base64 decode bug fixes
191 Patch by Jakob Hirsch
193 NM/36 Bugzilla 909: Correct connect() call in dcc code
195 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling
197 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed
199 NM/39 Bugzilla 911: Fixed MakeLinks build script
205 TK/01 Add preliminary DKIM support. Currently requires a forked version of
206 ALT-N's libdkim that I have put here:
207 http://duncanthrax.net/exim-experimental/
209 Note to Michael Haardt: I had to rename some vars in sieve.c. They
210 were called 'true' and it seems that C99 defines that as a reserved
211 keyword to be used with 'bool' variable types. That means you could
212 not include C99-style headers which use bools without triggering
213 build errors in sieve.c.
215 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
216 as mailq or other aliases. Changed the --help handling significantly
217 to do whats expected. exim_usage() emits usage/help information.
219 SC/01 Added the -bylocaldomain option to eximstats.
221 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
223 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
225 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
231 PH/01 Another patch from the Sieve maintainer.
233 PH/02 When an IPv6 address is converted to a string for single-key lookup
234 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
235 dots are used instead of colons so that keys in lsearch files need not
236 contain colons. This was done some time before quoting was made available
237 in lsearch files. However, iplsearch files do require colons in IPv6 keys
238 (notated using the quote facility) so as to distinguish them from IPv4
239 keys. This meant that lookups for IP addresses in host lists did not work
240 for iplsearch lookups.
242 This has been fixed by arranging for IPv6 addresses to be expressed with
243 colons if the lookup type is iplsearch. This is not incompatible, because
244 previously such lookups could never work.
246 The situation is now rather anomolous, since one *can* have colons in
247 ordinary lsearch keys. However, making the change in all cases is
248 incompatible and would probably break a number of configurations.
250 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
253 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
254 conversion specification without a maximum field width, thereby enabling
255 a rogue spamd server to cause a buffer overflow. While nobody in their
256 right mind would setup Exim to query an untrusted spamd server, an
257 attacker that gains access to a server running spamd could potentially
258 exploit this vulnerability to run arbitrary code as the Exim user.
260 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
261 $primary_hostname instead of what libspf2 thinks the hosts name is.
263 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
264 a directory entry by the name of the lookup key. Previously, if a
265 symlink pointed to a non-existing file or a file in a directory that
266 Exim lacked permissions to read, a lookup for a key matching that
267 symlink would fail. Now it is enough that a matching directory entry
268 exists, symlink or not. (Bugzilla 503.)
270 PH/03 The body_linecount and body_zerocount variables are now exported in the
273 PH/04 Added the $dnslist_matched variable.
275 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
276 This means they are set thereafter only if the connection becomes
279 PH/06 Added the client_condition to authenticators so that some can be skipped
280 by clients under certain conditions.
282 PH/07 The error message for a badly-placed control=no_multiline_responses left
283 "_responses" off the end of the name.
285 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
287 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
288 (without spaces) instead of just copying the configuration text.
290 PH/10 Added the /noupdate option to the ratelimit ACL condition.
292 PH/11 Added $max_received_linelength.
294 PH/12 Added +ignore_defer and +include_defer to host lists.
296 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
297 way in which PCRE > 7.0 is built.
299 PH/14 Implemented queue_only_load_latch.
301 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
302 MAIL command. The effect was to mangle the value on 64-bit systems.
304 PH/16 Another patch from the Sieve maintainer.
306 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
308 PH/18 If a system quota error occurred while trying to create the file for
309 a maildir delivery, the message "Mailbox is full" was not appended to the
310 bounce if the delivery eventually timed out. Change 4.67/27 below applied
311 only to a quota excession during the actual writing of the file.
313 PH/19 It seems that peer DN values may contain newlines (and other non-printing
314 characters?) which causes problems in log lines. The DN values are now
315 passed through string_printing() before being added to log lines.
317 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
318 and InterBase are left for another time.)
320 PH/21 Added message_body_newlines option.
322 PH/22 Guard against possible overflow in moan_check_errorcopy().
324 PH/23 POSIX allows open() to be a macro; guard against that.
326 PH/24 If the recipient of an error message contained an @ in the local part
327 (suitably quoted, of course), incorrect values were put in $domain and
328 $local_part during the evaluation of errors_copy.
334 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
335 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
338 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
339 issue a MAIL command.
341 PH/02 In an ACL statement such as
343 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
345 if a client was not listed at all, or was listed with a value other than
346 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
347 the condition was not true (as it should be), so access was not denied.
348 The bug was that the ! inversion was incorrectly passed on to the second
349 item. This has been fixed.
351 PH/03 Added additional dnslists conditions == and =& which are different from
352 = and & when the dns lookup returns more than one IP address.
354 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
355 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
357 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
358 FSYNC, which compiles an option called disable_fsync that allows for
359 bypassing fsync(). The documentation is heavily laced with warnings.
361 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
363 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
364 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
365 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
366 including adding "make clean"; (3) Added -fPIC when compiling the test
367 dynamically loaded module, to get rid of a warning.
369 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
370 message fails, move_frozen_messages = true and ignore_bounce_errors_after
371 = 0s. The bug is otherwise harmless.
373 PH/07 There was a bug in the dovecot authenticator such that the value of
374 $auth1 could be overwritten, and so not correctly preserved, after a
375 successful authentication. This usually meant that the value preserved by
376 the server_setid option was incorrect.
378 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
380 PH/09 Installed PCRE release 7.0.
382 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
383 run for batched SMTP input. It is now run at the start of every message
384 in the batch. While fixing this I discovered that the process information
385 (output by running exiwhat) was not always getting set for -bs and -bS
386 input. This is fixed, and it now also says "batched" for BSMTP.
388 PH/11 Added control=no_pipelining.
390 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
391 patch, slightly modified), and move the expansion of helo_data till after
392 the connection is made in the smtp transport (so it can use these
395 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
397 PH/14 Added log_selector = +pid.
399 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
401 PH/16 Add ${if forany and ${if forall.
403 PH/17 Added dsn_from option to vary the From: line in DSNs.
405 PH/18 Flush SMTP output before performing a callout, unless control =
406 no_callout_flush is set.
408 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
409 was true (the default) a successful delivery failed to delete the retry
410 item, thus causing premature timeout of the address. The bug is now
413 PH/20 Added hosts_avoid_pipelining to the smtp transport.
415 PH/21 Long custom messages for fakedefer and fakereject are now split up
416 into multiline reponses in the same way that messages for "deny" and
417 other ACL rejections are.
419 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
420 with slight modification.
422 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
423 draft, changing the syntax and factoring some duplicate code".
425 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
426 for deliveries of the second and subsequent messages over the same SMTP
429 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
430 ${reduce, with only minor "tidies".
432 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
434 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
435 expansion side effects.
437 PH/27 When a message times out after an over-quota error from an Exim-imposed
438 quota, the bounce message says "mailbox is full". This message was not
439 being given when it was a system quota that was exceeded. It now should
442 MH/03 Made $recipients available in local_scan(). local_scan() already has
443 better access to the recipient list through recipients_list[], but
444 $recipients can be useful in postmaster-provided expansion strings.
446 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
447 in the case of a MAIL command with additional options following the
448 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
449 were accidentally chopped off.
451 PH/29 SMTP synchronization checks are implemented when a command is read -
452 there is a check that no more input is waiting when there shouldn't be
453 any. However, for some commands, a delay in an ACL can mean that it is
454 some time before the response is written. In this time, more input might
455 arrive, invalidly. So now there are extra checks after an ACL has run for
456 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
457 pipelining has not been advertised.
459 PH/30 MH's patch to allow iscntrl() characters to be list separators.
461 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
462 returned in the SMTP response when smtp_return_error_details was false.
465 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
466 instead of the C I/O that was originally supplied, because problems were
469 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
470 Exim which did not show up earlier: it was assuming that a call to
471 SSL_CTX_set_info_callback() might give an error value. In fact, there is
472 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
473 was a macro that became an assignment, so it seemed to work. This has
474 changed to a proper function call with a void return, hence the compile
475 error. Exim's code has been fixed.
477 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
480 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
482 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
484 PH/37 If a message is not accepted after it has had an id assigned (e.g.
485 because it turns out to be too big or there is a timeout) there is no
486 "Completed" line in the log. When some messages of this type were
487 selected by exigrep, they were listed as "not completed". Others were
488 picked up by some special patterns. I have improved the selection
489 criteria to be more general.
491 PH/38 The host_find_failed option in the manualroute router can now be set
492 to "ignore", to completely ignore a host whose IP address cannot be
493 found. If all hosts are ignored, the behaviour is controlled by the new
494 host_all_ignored option.
496 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
497 homing or because of multiple MX records with /mx) generated more than
498 one IP address, and the following item turned out to be the local host,
499 all the secondary addresses of the first item were incorrectly removed
500 from the list, along with the local host and any following hosts (which
501 is what is supposed to happen).
503 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
504 whoever called Exim into the -H file. In the case of the daemon it was
505 behaving confusingly. When first started, it used values for whoever
506 started the daemon, but after a SIGHUP it used the Exim user (because it
507 calls itself on a restart). I have changed the code so that it now always
510 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
511 message are rejected with the same error (e.g. no authentication or bad
512 sender address), and a DATA command is nevertheless sent (as can happen
513 with PIPELINING or a stupid MUA), the error message that was given to the
514 RCPT commands is included in the rejection of the DATA command. This is
515 intended to be helpful for MUAs that show only the final error to their
518 PH/42 Another patch from the Sieve maintainer.
520 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
521 Eximstats - Fixed some broken HTML links and added missing column headers
523 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
524 columns for Rejects, Temp Rejects, Ham, and Spam rows.
526 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
528 PH/43 Yet another patch from the Sieve maintainer.
530 PH/44 I found a way to check for a TCP/IP connection going away before sending
531 the response to the final '.' that terminates a message, but only in the
532 case where the client has not sent further data following the '.'
533 (unfortunately, this is allowed). However, in many cases there won't be
534 any further data because there won't be any more messages to send. A call
535 to select() can be used: if it shows that the input is "ready", there is
536 either input waiting, or the socket has been closed. An attempt to read
537 the next input character can distinguish the two cases. Previously, Exim
538 would have sent an OK response which the client would never have see.
539 This could lead to message repetition. This fix should cure that, at
540 least in a lot of common cases.
542 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
543 advertised in response to EHLO.
549 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
550 fixed by 4.65/MH/01 (is this a record?) are fixed:
552 (i) An empty string was always treated as zero by the numeric comparison
553 operators. This behaviour has been restored.
555 (ii) It is documented that the numeric comparison operators always treat
556 their arguments as decimal numbers. This was broken in that numbers
557 starting with 0 were being interpreted as octal.
559 While fixing these problems I realized that there was another issue that
560 hadn't been noticed. Values of message_size_limit (both the global option
561 and the transport option) were treated as octal if they started with 0.
562 The documentation was vague. These values are now always treated as
563 decimal, and I will make that clear in the documentation.
569 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
570 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
573 MH/01 Don't check that the operands of numeric comparison operators are
574 integers when their expansion is in "skipping" mode (fixes bug
575 introduced by 4.64-PH/07).
577 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
578 child addresses, Exim now panics and dies. Previously, because the count
579 is held in a short int, deliveries were likely to be lost. As such a
580 large number of recipients for a single message is ridiculous
581 (performance will be very, very poor), I have chosen to impose a limit
582 rather than extend the field.
588 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
589 leftover -K file (the existence of which was triggered by #402).
590 While we were at it, introduced process PID as part of the -K
591 filename. This should rule out race conditions when creating
594 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
595 processing considerably. Previous code took too long for large mails,
596 triggering a timeout which in turn triggers #401.
598 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
599 in the DK code in transports.c. sendfile() is not really portable,
600 hence the _LINUX specificness.
602 TF/01 In the add_headers option to the mail command in an Exim filter,
603 there was a bug that Exim would claim a syntax error in any
604 header after the first one which had an odd number of characters
607 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
608 callout verification, Exim cached a "reject" for the entire domain. This
609 is correct for most verifications, but it is not correct for a recipient
610 verification with use_sender or use_postmaster set, because in that case
611 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
612 case of MAIL FROM:<> rejection from other early rejections (e.g.
613 rejection of HELO). When verifying a recipient using a non-null MAIL
614 address, the cache is ignored if it shows MAIL FROM:<> rejection.
615 Whatever the result of the callout, the value of the domain cache is
616 left unchanged (for any other kind of callout, getting as far as trying
617 RCPT means that the domain itself is ok).
619 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
622 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
623 manifest itself as EPIPE rather than ECONNECT. When tidying away a
624 session, the daemon ignores ECONNECT errors and logs others; it now
625 ignores EPIPE as well.
627 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
628 (quoted-printable decoding).
630 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
631 later the small subsequent patch to fix an introduced bug.
633 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
635 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
637 PH/08 An error is now given if message_size_limit is specified negative.
639 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
640 to be given (somewhat) arbitrary names.
642 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
645 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
646 miscellaneous code fixes
648 PH/10 Added the log_reject_target ACL modifier to specify where to log
651 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
652 hostname. This is wrong, because it relates to the incoming message (and
653 probably the interface on which it is arriving) and not to the outgoing
654 callout (which could be using a different interface). This has been
655 changed to use the value of the helo_data option from the smtp transport
656 instead - this is what is used when a message is actually being sent. If
657 there is no remote transport (possible with a router that sets up host
658 addresses), $smtp_active_hostname is used.
660 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
661 tweaks were necessary in order to get it to work (see also 21 below):
662 (a) The code assumed that strncpy() returns a negative number on buffer
663 overflow, which isn't the case. Replaced with Exim's string_format()
665 (b) There were several signed/unsigned issues. I just did the minimum
666 hacking in of casts. There is scope for a larger refactoring.
667 (c) The code used strcasecmp() which is not a standard C function.
668 Replaced with Exim's strcmpic() function.
669 (d) The code set only $1; it now sets $auth1 as well.
670 (e) A simple test gave the error "authentication client didn't specify
671 service in request". It would seem that Dovecot has changed its
672 interface. Fortunately there's a specification; I followed it and
673 changed what the client sends and it appears to be working now.
675 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
678 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
679 address A is aliased to B and C, where B exists and C does not. Without
680 -v the output is "A verified" because verification stops after a
681 successful redirection if more than one address is generated. However,
682 with -v the child addresses are also verified. Exim was outputting "A
683 failed to verify" and then showing the successful verification for C,
684 with its parentage. It now outputs "B failed to verify", showing B's
685 parentage before showing the successful verification of C.
687 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
688 look up a TXT record in a specific list after matching in a combined
691 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
692 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
693 they consult the DNS. I had assumed they would set it the way they
694 wanted; and indeed my experiments on Linux seem to show that in some
695 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
696 To be on the safe side, however, I have now made the interface to
697 host_find_byname() similar to host_find_bydns(), with an argument
698 containing the DNS resolver options. The host_find_byname() function now
699 sets these options at its start, just as host_find_bydns() does. The smtp
700 transport options dns_qualify_single and dns_search_parents are passed to
701 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
702 of host_find_byname() use the default settings of RES_DEFNAMES
703 (qualify_single) but not RES_DNSRCH (search_parents).
705 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
706 spool_read_header() do less string testing, by means of a preliminary
707 switch on the second character of optional "-foo" lines. (This is
708 overdue, caused by the large number of possibilities that now exist.
709 Originally there were few.) While I was there, I also converted the
710 str(n)cmp tests so they don't re-test the leading "-" and the first
711 character, in the hope this might squeeze out yet more improvement.
713 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
714 flag allowing group syntax was set by the header_syntax check but not
715 turned off, possible causing trouble later; (2) The flag was not being
716 set at all for the header_verify test, causing "group"-style headers to
717 be rejected. I have now set it in this case, and also caused header_
718 verify to ignore an empty address taken from a group. While doing this, I
719 came across some other cases where the code for allowing group syntax
720 while scanning a header line wasn't quite right (mostly, not resetting
721 the flag correctly in the right place). These bugs could have caused
722 trouble for malformed header lines. I hope it is now all correct.
724 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
725 with the "reply" argument non-NULL. The code, however (which originally
726 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
727 but it didn't always do it. This confused somebody who was copying the
728 code for some other use. I have removed all the tests.
730 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
731 feature that was used to support insecure browsers during the U.S. crypto
732 embargo. It requires special client support, and Exim is probably the
733 only MTA that supported it -- and would never use it because real RSA is
734 always available. This code has been removed, because it had the bad
735 effect of slowing Exim down by computing (never used) parameters for the
736 RSA_EXPORT functionality.
738 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
739 authenticator to fail if there's a tab character in the incoming data
740 (there should never be unless someone is messing about, as it's supposed
741 to be base64-encoded). Also added, on Timo's advice, the "secured" option
742 if the connection is using TLS or if the remote IP is the same as the
743 local IP, and the "valid-client-cert option" if a client certificate has
746 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
747 authenticators. This can be used for authorization after authentication
748 succeeds. (In the case of plaintext, it servers for both authentication
751 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
752 if any retry times were supplied.
754 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
755 connection, where there is no client IP address to check. In this
756 situation, the verify now always succeeds.
758 PH/25 Applied John Jetmore's -Mset patch.
760 PH/26 Added -bem to be like -Mset, but loading a message from a file.
762 PH/27 In a string expansion for a processed (not raw) header when multiple
763 headers of the same name were present, leading whitespace was being
764 removed from all of them, but trailing whitespace was being removed only
765 from the last one. Now trailing whitespace is removed from each header
766 before concatenation. Completely empty headers in a concatenation (as
769 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
770 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
772 PH/29 [Removed. This was a change that I later backed out, and forgot to
773 correct the ChangeLog entry (that I had efficiently created) before
774 committing the later change.]
776 PH/30 Exim was sometimes attempting to deliver messages that had suffered
777 address errors (4xx response to RCPT) over the same connection as other
778 messages routed to the same hosts. Such deliveries are always "forced",
779 so retry times are not inspected. This resulted in far too many retries
780 for the affected addresses. The effect occurred only when there were more
781 hosts than the hosts_max_try setting in the smtp transport when it had
782 the 4xx errors. Those hosts that it had tried were not added to the list
783 of hosts for which the message was waiting, so if all were tried, there
784 was no problem. Two fixes have been applied:
786 (i) If there are any address or message errors in an SMTP delivery, none
787 of the hosts (tried or untried) are now added to the list of hosts
788 for which the message is waiting, so the message should not be a
789 candidate for sending over the same connection that was used for a
790 successful delivery of some other message. This seems entirely
791 reasonable: after all the message is NOT "waiting for some host".
792 This is so "obvious" that I'm not sure why it wasn't done
793 previously. Hope I haven't missed anything, but it can't do any
794 harm, as the worst effect is to miss an optimization.
796 (ii) If, despite (i), such a delivery is accidentally attempted, the
797 routing retry time is respected, so at least it doesn't keep
798 hammering the server.
800 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
801 in ${readsocket because some servers need this prod.
803 PH/32 Added some extra debug output when updating a wait-xxx database.
805 PH/33 The hint "could be header name not terminated by colon", which has been
806 given for certain expansion errors for a long time, was not being given
807 for the ${if def:h_colon_omitted{... case.
809 PH/34 The spec says: "With one important exception, whenever a domain list is
810 being scanned, $domain contains the subject domain." There was at least
811 one case where this was not true.
813 PH/35 The error "getsockname() failed: connection reset by peer" was being
814 written to the panic log as well as the main log, but it isn't really
815 panic-worthy as it just means the connection died rather early on. I have
816 removed the panic log writing for the ECONNRESET error when getsockname()
819 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
820 runs only) independently of the message's sender address. This meant
821 that, if the 4xx error was in fact related to the sender, a different
822 message to the same recipient with a different sender could confuse
823 things. In particualar, this can happen when sending to a greylisting
824 server, but other circumstances could also provoke similar problems.
825 I have changed the default so that the retry time for these errors is now
826 based a combination of the sender and recipient addresses. This change
827 can be overridden by setting address_retry_include_sender=false in the
830 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
831 remote server are returned as part of bounce messages. This was not
832 happening for LMTP over a pipe (the lmtp transport), but now it is the
833 same for both kinds of LMTP.
835 PH/38 Despite being documented as not happening, Exim was rewriting addresses
836 in header lines that were in fact CNAMEs. This is no longer the case.
838 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
839 and queue runs started by the daemon processed all messages. This has
840 been fixed so that -R and -S can now usefully be given with -q<time>.
842 PH/40 Import PCRE release 6.7 (fixes some bugs).
844 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
846 PH/42 Give an error if -q is specified more than once.
848 PH/43 Renamed the variables $interface_address and $interface_port as
849 $received_ip_address and $received_port, to make it clear that these
850 values apply to message reception, and not to the outgoing interface when
851 a message is delivered. (The old names remain recognized, of course.)
853 PH/44 There was no timeout on the connect() call when using a Unix domain
854 socket in the ${readsocket expansion. There now is.
856 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
857 be meaningful with "accept".
859 SC/01 Eximstats V1.43
860 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
862 SC/02 Eximstats V1.44
863 Use a glob alias rather than an array ref in the generated
864 parser. This improves both readability and performance.
866 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
867 Collect SpamAssassin and rejection statistics.
868 Don't display local sender or destination tables unless
869 there is data to show.
870 Added average volumes into the top table text output.
872 SC/04 Eximstats V1.46
873 Collect data on the number of addresses (recipients)
874 as well as the number of messages.
876 SC/05 Eximstats V1.47
877 Added 'Message too big' to the list of mail rejection
878 reasons (thanks to Marco Gaiarin).
880 SC/06 Eximstats V1.48
881 Mainlog lines which have GMT offsets and are too short to
882 have a flag are now skipped.
884 SC/07 Eximstats V1.49 (Alain Williams)
885 Added the -emptyok flag.
887 SC/08 Eximstats V1.50
888 Fixes for obtaining the IP address from reject messages.
890 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
891 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
892 whitesspace changes from 4.64-PH/27
894 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
897 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
898 are found, allow negative numbers in numeric criteria)
900 JJ/06 exipick.20061117.2, added new $message_body_missing variable
902 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
903 to match changes made in 4.64-PH/43
905 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
907 PH/47 Put in an explicit test for a DNS lookup of an address record where the
908 "domain" is actually an IP address, and force a failure. This locks out
909 those revolvers/nameservers that support "A-for-A" lookups, in
910 contravention of the specifications.
912 PH/48 When a host name was looked up from an IP address, and the subsequent
913 forward lookup of the name timed out, the host name was left in
914 $sender_host_name, contrary to the specification.
916 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
917 restricted to single-key lookups, Exim was not diagnosing an error if
918 * or *@ was used with a query-style lookup.
920 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
922 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
923 long ago, but noone interested enough thought of it. Let's just say that
924 the "1.1" means that there are some new functions that weren't there at
925 some point in the past.
927 PH/51 Error processing for expansion failure of helo_data from an smtp
928 transport during callout processing was broken.
930 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
931 tested/used via the -bh/-bhc/-bs options.
933 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
934 bug, fixed in subsequent PCRE releases).
936 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
937 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
939 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
945 SC/01 Use a glob alias rather than an array ref in eximstats generated
946 parser. This improves both readability and performance.
948 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
949 Don't display local sender or destination tables in eximstats unless
950 there is data to show.
951 Added average volumes into the eximstats top table text output.
953 SC/03 Collect data on the number of addresses (recipients) as well
954 as the number of messages in eximstats.
956 TF/01 Correct an error in the documentation for the redirect router. Exim
957 does (usually) call initgroups() when daemonizing.
959 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
960 with consistent privilege compared to when running as a daemon.
962 TF/03 Note in the spec that $authenticated_id is not set for local
963 submissions from trusted users.
965 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
966 Thanks to Dean Brooks <dean@iglou.com> for the patch.
968 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
969 by adding some example configuration directives to the default
970 configuration file. A little bit of work is required to uncomment the
971 directives and define how usernames and passwords are checked, but
972 there is now a framework to start from.
974 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
975 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
976 without this. I don't know how relevant this is to other LDAP libraries.
978 PH/02 Add the verb name to the "unknown ACL verb" error.
980 PH/03 Magnus Holmgren's patch for filter_prepend_home.
982 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
984 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
985 directory not expanded when it should be if an expanded home directory
986 was set for the address (which is overridden by the transport).
988 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
991 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
992 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
993 because it is too late at that time, and has no effect.
995 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
996 security issue with \' (bugzilla #107). I could not use the
997 PQescapeStringConn() function, because it needs a PGconn value as one of
1000 PH/08 When testing addresses using -bt, indicate those final addresses that
1001 are duplicates that would not cause an additional delivery. At least one
1002 person was confused, thinking that -bt output corresponded to deliveries.
1003 (Suppressing duplicates isn't a good idea as you lose the information
1004 about possibly different redirections that led to the duplicates.)
1006 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1007 systems where poll() doesn't work, in particular OS X.
1009 PH/10 Added more information to debugging output for retry time not reached.
1011 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1012 operations in malware.c.
1014 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1017 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1018 syslog_duplication set false, log lines that would normally be written
1019 both the the main log and to the reject log were not written to syslog at
1022 PH/14 In the default configuration, change the use of "message" in ACL warn
1023 statements to "add_header".
1025 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1026 not followed by a command (e.g. "seen endif").
1028 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1029 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1032 PH/17 Added extra conditions to the default value of delay_warning_condition
1036 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1037 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1038 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1041 The Auto-Submitted: and various List- headers are standardised, whereas I
1042 don't think Precedence: ever was.
1044 PH/18 Refactored debugging code in route_finduser() to show more information,
1045 in particular, the error code if getpwnam() issues one.
1047 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1048 This is apparently needed in addition to the PH/07 change above to avoid
1049 any possible encoding problems.
1051 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1052 but not after initializing Perl.
1054 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1055 output them only if debugging. By default they are written stderr,
1056 apparently, which is not desirable.
1058 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1061 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1064 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1066 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1067 authenticated or an ident call has been made. Suppress the default
1068 values for $authenticated_id and $authenticated_sender (but permit -oMai
1069 and -oMas) when testing with -bh.
1071 PH/24 Re-jigged the order of the tests in the default configuration so that the
1072 tests for valid domains and recipients precede the DNS black list and CSA
1073 tests, on the grounds that those ones are more expensive.
1075 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1076 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1077 This bug exists in every version of Exim that I still have, right back to
1080 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1081 However, an attempt to turn on case-sensitivity in a regex key by
1082 including (?-i) didn't work because the subject string was already
1083 lowercased, and the effects were non-intuitive. It turns out that a
1084 one-line patch can be used to allow (?-i) to work as expected.
1090 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1091 other effects) broke the use of negated acl sub-conditions.
1093 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1096 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1097 "Deny" causes Exim to reject the incoming connection with a 554 error.
1098 Unfortunately, if there is a major crisis, such as a disk failure,
1099 tcp-wrappers gives "deny", whereas what one would like would be some
1100 kind of temporary error. A kludge has been added to help with this.
1101 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1102 554 error is used if errno is still zero or contains ENOENT (which occurs
1103 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1106 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1108 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1109 errors. Otherwise a message that provokes a temporary error (when other
1110 messages do not) can cause a whole host to time out.
1112 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1113 addresses were routed directly to files or pipes from a redirect router.
1114 File deliveries just didn't batch; pipe deliveries might have suffered
1117 PH/06 A failure to get a lock for a hints database would erroneously always say
1118 "Failed to get write lock", even when it was really a read lock.
1120 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1121 of 0600. This has been changed to use the value of the lockfile_mode
1122 option (which defaults to 0600).
1124 PH/08 Applied small patch from the Sieve maintainer.
1126 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1127 folder from quota calculations, a direct delivery into this folder messed
1128 up the contents of the maildirsize file. This was because the regex was
1129 used only to exclude .Trash (or whatever) when the size of the mailbox
1130 was calculated. There was no check that a delivery was happening into an
1131 excluded directory. This bug has been fixed by ignoring all quota
1132 processing for deliveries into excluded directories.
1134 PH/10 Added the maildirfolder_create_regex option to appendfile.
1140 PH/01 The code for finding all the local interface addresses on a FreeBSD
1141 system running IPv6 was broken. This may well have applied to all BSD
1142 systems, as well as to others that have similar system calls. The broken
1143 code found IPv4 interfaces correctly, but gave incorrect values for the
1144 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1145 that it would not match correctly against @[] and not recognize the IPv6
1148 PH/02 The ipliteral router was not recognizing addresses of the form user@
1149 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1151 PH/03 Added disable_ipv6.
1153 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1154 decoded form, because it is most often used to construct To: headers
1155 lines in autoreplies, and the decoded form may well be syntactically
1156 invalid. However, $reply_address has leading white space removed, and all
1157 newlines turned into spaces so that the autoreply transport does not
1160 PH/05 If group was specified without a user on a router, and no group or user
1161 was specified on a transport, the group from the router was ignored.
1163 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1164 for visible compile-time settings that can be used to change these
1165 numbers, for those that want even more. Backwards compatibility with old
1166 spool files has been maintained. However, going back to a previous Exim
1167 release will lost any variables that are in spool files.
1169 PH/07 Two small changes when running in the test harness: increase delay when
1170 passing a TCP/IP connection to a new process, in case the original
1171 process has to generate a bounce, and remove special handling of
1172 127.0.0.2 (sic), which is no longer necessary.
1174 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1175 be the same on different OS.
1177 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1180 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1181 whether --show-vars was specified or not
1183 JJ/02 exipick: Added support for new ACL variable spool format introduced
1186 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1187 syntactically invalid From: or Reply-to: line, and a filter used this to
1188 generate an autoreply, and therefore failed to obtain an address for the
1189 autoreply, Exim could try to deliver to a non-existent relative file
1190 name, causing unrelated and misleading errors. What now happens is that
1191 it logs this as a hard delivery error, but does not attempt to create a
1194 PH/11 The exinext utility has a -C option for testing purposes, but although
1195 the given file was scanned by exinext itself; it wasn't being passed on
1196 when Exim was called.
1198 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1199 an end-of-file indication when reading a command response.
1201 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1202 compiled. In many other places in Exim, IPv6 addresses are always
1203 recognized, so I have changed this. It also means that IPv4 domain
1204 literals of the form [IPV4:n.n.n.n] are now always recognized.
1206 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1207 used if the router is not running as root, for example, when verifying at
1208 ACL time, or when using -bh. The debugging output from this situation was
1209 non-existent - all you got was a failure to exec. I have made two
1212 (a) Failures to set uid/gid, the current directory, or a process leader
1213 in a subprocess such as that created by queryprogram now generate
1214 suitable debugging ouput when -d is set.
1216 (b) The queryprogram router detects when it is not running as root,
1217 outputs suitable debugging information if -d is set, and then runs
1218 the subprocess without attempting to change uid/gid.
1220 PH/15 Minor change to Makefile for building test_host (undocumented testing
1223 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1224 additional section of a DNS packet that returns MX or SRV records.
1225 Instead, it always explicitly searches for A/AAAA records. This avoids
1226 major problems that occur when a DNS server includes only records of one
1227 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1228 fixed another bug: if SRV records were looked up and the corresponding
1229 address records were *not* found in the additional section, the port
1230 values from the SRV records were lost.
1232 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1233 using the correct key (the original address) when searching the retry
1234 rules in order to find which one to use for generating the retry hint.
1236 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1237 adding the default one. Similarly, if it contains a Reply-To: header, the
1238 errors_reply_to option, if set, is not used.
1240 PH/19 When calculating a retry time, Exim used to measure the "time since
1241 failure" by looking at the "first failed" field in the retry record. Now
1242 it does not use this if it is later than than the arrival time of the
1243 message. Instead it uses the arrival time. This makes for better
1244 behaviour in cases where some deliveries succeed, thus re-setting the
1245 "first failed" field. An example is a quota failure for a huge message
1246 when small messages continue to be delivered. Without this change, the
1247 "time since failure" will always be short, possible causing more frequent
1248 delivery attempts for the huge message than are intended.
1249 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1251 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1252 $1, $2, $3) because the numerical variables can be reset during some
1253 expansion items (e.g. "match"), thereby losing the authentication data.
1255 PH/21 Make -bV show the size of off_t variables so that the test suite can
1256 decide whether to run tests for quotas > 2G.
1258 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1259 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1260 filecount value is greater than 2G or if a quota value is greater than 2G
1261 on a system where the size of off_t is not greater than 4, a panic error
1264 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1265 never match. The debug and -bh output now contains an explicit error
1266 message indicating a malformed IPv4 address or mask.
1268 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1269 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1270 PH/23 above applies.
1272 PH/25 Do not write to syslog when running in the test harness. The only
1273 occasion when this arises is a failure to open the main or panic logs
1274 (for which there is an explicit test).
1276 PH/26 Added the /no_tell option to "control=freeze".
1278 PH/27 If a host name lookup failed very early in a connection, for example, if
1279 the IP address matched host_lookup and the reverse lookup yielded a name
1280 that did not have a forward lookup, an error message of the form "no IP
1281 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1282 could be logged. Now it outputs the IP address instead of "NULL".
1284 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1285 allows the sender and the authenticated sender to be set when
1286 submitting a message from within Exim. Since child_open_exim() is
1287 documented for local_scan(), the new function should be too.
1289 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1290 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1291 results in an empty string is now treated as unset.
1293 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1295 PH/31 Added sender_verify_fail logging option.
1297 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1298 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1299 tidied the source and removed it altogether.
1301 PH/33 When a queue run was abandoned because the load average was too high, a
1302 log line was always written; now it is written only if the queue_run log
1303 selector is set. In addition, the log line for abandonment now contains
1304 information about the queue run such as the pid. This is always present
1305 in "start" and "stop" lines but was omitted from the "abandon" line.
1307 PH/34 Omit spaces between a header name and the colon in the error message that
1308 is given when verify = headers_syntax fails (if there are lots of them,
1309 the message gets confusing).
1311 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1312 names, as there are now some PTR records that contain slashes. This check
1313 is only to protect against broken name servers that fall over on strange
1314 characters, so the fact that it applies to all lookups doesn't matter.
1316 PH/36 Now that the new test suite is complete, we can remove some of the
1317 special code in Exim that was needed for the old test suite. For example,
1318 sorting DNS records because real resolvers return them in an arbitrary
1319 order. The new test suite's fake resolver always returns records in the
1322 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1323 bounces) except when queue_only is set, to avoid logging races between
1324 the different processes.
1326 PH/38 Panic-die if .include specifies a non-absolute path.
1328 PH/39 A tweak to the "H" retry rule from its user.
1330 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1331 a label. They prevented compilation on older perls.
1333 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1334 a warning to be raised on newish perls.
1336 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1337 on queue. Changes to match documented behaviour of showing count of
1338 messages matching specified criteria.
1340 PH/40 Changed the default ident timeout from 30s to 5s.
1342 PH/41 Added support for the use of login_cap features, on those BSD systems
1343 that have them, for controlling the resources used by pipe deliveries.
1345 PH/42 The content-scanning code uses fopen() to create files in which to put
1346 message data. Previously it was not paying any attention to the mode of
1347 the files. Exim runs with umask(0) because the rest of the code creates
1348 files with open(), and sets the required mode explicitly. Thus, these
1349 files were ending up world-writeable. This was not a big issue, because,
1350 being within the spool directory, they were not world-accessible. I have
1351 created a function called modefopen, which takes an additional mode
1352 argument. It sets umask(777), creates the file, chmods it to the required
1353 mode, then resets the umask. All the relevant calls to fopen() in the
1354 content scanning code have been changed to use this function.
1356 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1357 to 24 hours. This avoids potential overflow problems when processing G
1358 and H retry rules. I suspect nobody ever tinkers with this value.
1360 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1362 PH/45 When the plaintext authenticator is running as a client, the server's
1363 challenges are checked to ensure they are valid base64 strings. By
1364 default, the authentication attempt is cancelled if an invalid string is
1365 received. Setting client_ignore_invalid_base64 true ignores these errors.
1366 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1367 they are received. Thus, the responses can be made to depend on the
1368 challenges. If an invalid string is ignored, an empty string is placed in
1371 PH/46 Messages that are created by the autoreply transport now contains a
1372 References: header, in accordance with RFCs 2822 and 3834.
1374 PH/47 Added authenticated_sender_force to the smtp transport.
1376 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1378 PH/49 Installed latest patch from the Sieve maintainer.
1380 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1381 was also set, the appendfile transport was unnecessarily scanning a
1382 directory of message files (e.g. for maildir delivery) to find the count
1383 of files (along with the size), even though it did not need this
1384 information. It now does the scan only if it needs to find either the
1385 size of the count of files.
1387 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1389 PH/52 Two bugs concerned with error handling when the smtp transport is
1392 (i) Exim was not creating retry information for temporary errors given
1393 for individual recipients after the DATA command when the smtp transport
1394 was used in LMTP mode. This meant that they could be retried too
1395 frequently, and not timed out correctly.
1397 (ii) Exim was setting the flag that allows error details to be returned
1398 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1399 recipients that were returned after the DATA command.
1401 PH/53 This is related to PH/52, but is more general: for any failing address,
1402 when detailed error information was permitted to be returned to the
1403 sender, but the error was temporary, then after the final timeout, only
1404 "retry timeout exceeded" was returned. Now it returns the full error as
1405 well as "retry timeout exceeded".
1407 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1408 do this, and (what is worse) MTAs that accept it.
1410 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1411 will now be deprecated.
1413 PH/56 New os.c-cygwin from the Cygwin maintainer.
1415 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1416 formats (previously only available in exim formats via -bpr, -bpru,
1417 and -bpra. Now also available in native and exiqgrep formats)
1419 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1420 with very large, slow to parse queues
1422 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1424 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1426 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1427 responses to authentication challenges, though it was showing the
1428 challenges; (ii) I've removed the CR characters from the debug output for
1431 PH/58 Allow for the insertion of a newline as well as a space when a string
1432 is turned into more than one encoded-word during RFC 2047 encoding. The
1433 Sieve code now uses this.
1435 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1436 data_4xx, lost_connection, tls_required.
1438 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1439 message was being sent as an SMTP response.
1441 PH/61 Add -l and -k options to exicyclog.
1443 PH/62 When verifying, if an address was redirected to one new address, so that
1444 verification continued, and the new address failed or deferred after
1445 having set something in $address_data, the value of $address_data was not
1446 passed back to the ACL. This was different to the case when no
1447 redirection occurred. The value is now passed back in both cases.
1449 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1450 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1451 use login_cap.h, so on its own it isn't the distinguishing feature. The
1452 new name refers directly to the setclassresources() function.
1454 PH/65 Added configuration files for NetBSD3.
1456 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1458 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1459 is preferred over IPv4.
1461 PH/68 The bounce_return_message and bounce_return_body options were not being
1462 honoured for bounces generated during the reception of non-SMTP messages.
1463 In particular, this applied to messages rejected by the ACL. This bug has
1464 been fixed. However, if bounce_return_message is true and bounce_return_
1465 body is false, the headers that are returned for a non-SMTP message
1466 include only those that have been read before the error was detected.
1467 (In the case of an ACL rejection, they have all been read.)
1469 PH/69 The HTML version of the specification is now built in a directory called
1470 spec_html instead of spec.html, because the latter looks like a path with
1471 a MIME-type, and this confuses some software.
1473 PH/70 Catch two compiler warnings in sieve.c.
1475 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1476 function verify_get_ident() calls ip_connect() to connect a socket, but
1477 if the "connect()" function timed out, ip_connect() used to close the
1478 socket. However, verify_get_ident() also closes the socket later, and in
1479 between Exim writes to the log, which may get opened at this point. When
1480 the socket was closed in ip_connect(), the log could get the same file
1481 descriptor number as the socket. This naturally causes chaos. The fix is
1482 not to close the socket in ip_connect(); the socket should be closed by
1483 the function that creates it. There was only one place in the code where
1484 this was missing, in the iplookup router, which I don't think anybody now
1485 uses, but I've fixed it anyway.
1487 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1488 well as to direct DNS lookups. Otherwise the handling of names in host
1489 lists is inconsistent and therefore confusing.
1495 PH/01 Two changes to the default runtime configuration:
1497 (1) Move the checks for relay_from_hosts and authenticated clients from
1498 after to before the (commented out) DNS black list checks.
1500 (2) Add control=submission to the relay_from_hosts and authenticated
1501 clients checks, on the grounds that messages accepted by these
1502 statements are most likely to be submissions.
1504 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1506 (1) Generate an error if the third argument for the ${prvs expansion is
1509 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1512 (3) Reset the variables that are obtained from the first argument of
1513 ${prvscheck and used in the second argument before leaving the code,
1514 because their memory is reclaimed, so using them afterwards may do
1517 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1518 one (it's much easier than Tom thought :-).
1520 (5) Because of (4), we can now allow for the use of $prvscheck_result
1521 inside the third argument.
1523 PH/03 For some reason, the default setting of PATH when running a command from
1524 a pipe transport was just "/usr/bin". I have changed it to
1527 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1528 anything to be listed in the output from -bV.
1530 PH/05 When a filter generated an autoreply, the entire To: header line was
1531 quoted in the delivery log line, like this:
1533 => >A.N.Other <ano@some.domain> <original@ddress> ...
1535 This has been changed so that it extracts the operative address. There
1536 may be more than one such address. If so, they are comma-separated, like
1539 => >ano@some.domain,ona@other.domain <original@ddress> ...
1541 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1542 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1543 not being looked up in the rDNS to get a host name, Exim was showing the
1544 IP address twice in Received: lines, even though the IP addresses were
1545 identical. For example:
1547 Received: from [1.2.3.4] (helo=[1.2.3.4])
1549 However, if the real host name was known, it was omitting the HELO data
1550 if it matched the actual IP address. This has been tidied up so that it
1551 doesn't show the same IP address twice.
1553 PH/07 When both +timestamp and +memory debugging was on, the value given by
1554 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1555 called by the debug printing, thereby overwriting the timestamp buffer.
1556 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1558 PH/08 When the original message was included in an autoreply transport, it
1559 always said "this is a copy of the message, including all the headers",
1560 even if body_only or headers_only was set. It now gives an appropriate
1563 PH/09 Applied a patch from the Sieve maintainer which:
1565 o fixes some comments
1566 o adds the (disabled) notify extension core
1567 o adds some debug output for the result of if/elsif tests
1568 o points to the current vacation draft in the documentation
1569 and documents the missing references header update
1573 o fixes a bug in processing the envelope test (when testing
1574 multiple envelope elements, the last element determinted the
1577 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1578 Electronic Mail") by including:
1580 Auto-submitted: auto-generated
1582 in the messages that it generates (bounce messages and others, such as
1583 warnings). In the case of bounce messages for non-SMTP mesages, there was
1584 also a typo: it was using "Auto_submitted" (underscore instead of
1585 hyphen). Since every message generated by Exim is necessarily in response
1586 to another message, thes have all been changed to:
1588 Auto-Submitted: auto-replied
1590 in accordance with these statements in the RFC:
1592 The auto-replied keyword:
1594 - SHOULD be used on messages sent in direct response to another
1595 message by an automatic process,
1597 - MUST NOT be used on manually-generated messages,
1599 - MAY be used on Delivery Status Notifications (DSNs) and Message
1600 Disposition Notifications (MDNs),
1602 - MUST NOT be used on messages generated by automatic or periodic
1603 processes, except for messages which are automatic responses to
1606 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1607 to the default Received: header definition.
1609 PH/12 Added log selector acl_warn_skipped (default on).
1611 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1612 variables because (a) they are in the wrong storage pool and (b) even if
1613 they were copied, it wouldn't work properly because of the caching.
1615 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1616 checking when decoding. Apparently there are clients that generate
1617 overlong encoded strings. Why am I not surprised?
1619 PH/15 If the first argument of "${if match_address" was not empty, but did not
1620 contain an "@" character, Exim crashed. Now it writes a panic log message
1621 and treats the condition as false.
1623 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1625 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1626 extension "envelope-auth". The code is finished and in agreement with
1627 other implementations, but there is no documentation so far and in fact,
1628 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1629 not changing the active code.
1631 Print executed "if" and "elsif" statements when debugging is used. This
1632 helps a great deal to understand what a filter does.
1634 Document more things not specified clearly in RFC3028. I had all this
1635 sorted out, when out of a sudden new issues came to my mind. Oops."
1637 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1640 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1641 canonical form (as documented). However, after a host name lookup from
1642 the IP address, check_host() was doing a simple string comparison with
1643 addresses acquired from the DNS when checking that the found name did
1644 have the original IP as one of its addresses. Since any found IPv6
1645 addresses are likely to be in abbreviated form, the comparison could
1646 fail. Luckily, there already exists a function for doing the comparison
1647 by converting both addresses to binary, so now that is used instead of
1648 the text comparison.
1650 PH/20 There was another similar case to PH/19, when a complete host name was
1651 given in a host list; looking up its IP address could give an abbreviated
1652 form, whereas the current host's name might or might not be abbreviated.
1653 The same fix has been applied.
1659 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1660 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1663 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1664 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1666 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1668 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1669 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1670 Also, for "Auto-Submitted", treat anything other than "no" as
1671 non-personal, in accordance with RFC 3834. (Previously it treated
1672 anything starting "auto-" as non-personal.)
1674 TF/01 The control=submission/name=... option had a problem with syntax
1675 errors if the name included a slash character. The /name= option
1676 now slurps the rest of the string, so it can include any characters
1677 but it must come last in the list of options (after /sender_retain
1680 PH/05 Some modifications to the interface to the fake nameserver for the new
1688 TK/01 Added the "success_on_redirect" address verification option. See
1689 NewStuff for rationale and an example.
1691 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1693 PH/02 Patch to exigrep to allow it to work on syslog lines.
1695 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1696 fread() to skip over the body file's header line, because in Cygwin the
1697 header line is locked and is inaccessible.
1699 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1700 co-exist for some time) to make it clear that it is the Exim ID that is
1701 referenced, not the Message-ID: header line.
1703 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1704 string_format() function, because snprintf() does not exist on all
1707 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1708 ${stat: expansion item.
1710 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1711 protocol synchronization error", to keep the pedants happy.
1713 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1714 well as for IRIX systems, when gcc is being used. See the host.c source
1717 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1719 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1722 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1723 transport and to the smtp transport in LMTP mode.
1725 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1727 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1728 run a filter in a subprocess. This could lead to confusion in subsequent
1729 lookups in the parent process. There should also be a search_tidyup() at
1730 the end of the subprocess.
1732 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1733 only if the host matched helo_try_verify_hosts, which caused the
1734 verification to occur when the EHLO/HELO command was issued. The ACL just
1735 tested the remembered result. Now, if a previous verification attempt has
1736 not happened, "verify = helo" does it there and then.
1738 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1740 TK/03 Fix log output including CR from clamd.
1742 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1743 exist provoked a memory error which could cause a segfault.
1745 PH/15 Installed PCRE 6.2
1747 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1749 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1750 of the problem. Specifically, suggested +O2 rather than +O1 for the
1753 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1755 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1756 record, the port was not correctly logged when the outgoing_port log
1757 selector was set (it logged the transort's default port).
1759 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1760 fallback_hosts, and "hosts" in the smtp transport.
1762 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1763 host errors such as "Connection refused".
1765 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1766 authentication with radiusclient 0.4.9:
1768 - Error returned from rc_read_config was caught wrongly
1769 - Username/password not passed on to radius server due to wrong length.
1771 The presumption is that some radiusclient API changes for 4.51/PH/17
1772 were not taken care of correctly. The code is still untested by me (my
1773 Linux distribution still has 0.3.2 of radiusclient), but it was
1774 contributed by a Radius user.
1776 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1777 expanding the "port" option of the smtp transport.
1779 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1780 while reading a MIME header. Thanks to Tom Hughes for a patch.
1782 PH/24 Include config.h inside local_scan.h so that configuration settings are
1785 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1786 that in an ACL for RCPT (for example), you can examine exactly what was
1789 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1790 commands, but it was not correctly comparing the address with the actual
1791 client host address. Thus, it would show the EHLO address in Received:
1792 header lines when this was not necessary.
1794 PH/27 Added the % operator to ${eval:}.
1796 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1797 it should be ignoring failures (because with -C, for example, it has lost
1798 privilege). It wasn't ignoring creation failures other than "already
1801 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1804 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1805 because an input line was too long, either on its own, or by virtue of
1806 too many continuations, the temporary file was not being removed, and the
1807 return code was incorrect.
1809 PH/31 Missing "BOOL" in function definition in filtertest.c.
1811 PH/32 Applied Sieve patches from the maintainer.
1813 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1815 PH/33 Added "verify = not_blind".
1817 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1818 Local/Makefile (with some defaults set). These are used in built scripts
1819 such as exicyclog, but they have never been used in the exim_install
1820 script (though there are many overriding facilities there). I have
1821 arranged that the exim_install script now takes note of these two
1824 PH/35 Installed configuration files for Dragonfly.
1826 PH/36 When a locally submitted message by a trusted user did not contain a
1827 From: header, and the sender address was obtained from -f or from an SMTP
1828 MAIL command, and the trusted user did not use -F to supply a sender
1829 name, $originator_name was incorrectly used when constructing a From:
1830 header. Furthermore, $originator_name was used for submission mode
1831 messages from external hosts without From: headers in a similar way,
1832 which is clearly wrong.
1834 PH/37 Added control=suppress_local_fixups.
1836 PH/38 When log_selector = +received_sender was set, and the addition of the
1837 sender made the log line's construction buffer exactly full, or one byte
1838 less than full, an overflow happened when the terminating "\n" was
1841 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1842 when the result of a list match is failure because a DNS lookup failed.
1844 PH/40 RM_COMMAND is now used in the building process.
1846 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1847 the "build-* directories that it finds.
1849 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1850 address in a domain literal was a prefix of an interface address.
1852 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1853 when verifying a sender address, unless rewrite_headers is false.
1855 PH/44 Wrote a long comment about why errors_to addresses are verified as
1856 recipients, not senders.
1858 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1859 the ratelimit ACL was added.
1861 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1863 PH/46 Added extra information about PostgreSQL errors to the error string.
1865 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1866 avoiding the need to install special zones in a real server. This is
1867 backwards compatible; if it can't find the fake resolver, it drops back.
1868 Thus, both old and new test suites can be run.
1870 TF/02 Added util/ratelimit.pl
1872 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1873 clock is set back in time.
1875 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1876 Candler <B.Candler@pobox.com>.
1878 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1879 OK for addresses that are the result of redirections.
1881 PH/48 A number of further additions for the benefit of the new test suite,
1882 including a fake gethostbyname() that interfaces to the fake DNS resolver
1885 TF/06 The fix for widen_domains has also been applied to qualify_single and
1886 search_parents which are the other dnslookup options that can cause
1889 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1892 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1894 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1895 service" if it encountered an MX record with an empty target hostname.
1896 The message is now "an MX or SRV record indicated no SMTP service".
1898 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1899 if the DNS of the sending site is misconfigured. This is quite a
1900 common situation. This change restores the behaviour of treating a
1901 helo verification defer as a failure.
1903 PH/51 If self=fail was set on a router, the bounce message did not include the
1904 actual error message.
1910 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1912 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1913 command itself ended in error, the underlying message about the transport
1914 filter timeout was being overwritten with the pipe command error. Now the
1915 underlying error message should be appended to the second error message.
1917 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1919 PH/02 Reduce the amount of output that "make" produces by default. Full output
1920 can still be requested.
1922 PH/03 The warning log line about a condition test deferring for a "warn" verb
1923 was being output only once per connection, rather than after each
1924 occurrence (because it was using the same function as for successful
1925 "warn" verbs). This seems wrong, so I have changed it.
1927 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1928 it should not have, which might have caused a crash in the right
1929 circumstances, but probably never did.
1931 PH/04 Installed a modified version of Tony Finch's patch to make submission
1932 mode fix the return path as well as the Sender: header line, and to
1933 add a /name= option so that you can make the user's friendly name appear
1936 TF/03 Added the control = fakedefer ACL modifier.
1938 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1939 Mark Lowes for thorough testing.
1941 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1943 TK/03 Merged latest SRS patch from Miles Wilton.
1945 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1946 with the definition in sysexits.h (which is #included earlier).
1947 Fortunately, Exim does not actually use EX_OK. The code used to try to
1948 preserve the sysexits.h value, by assumimg that macro definitions were
1949 scanned for macro replacements. I have been disabused of this notion,
1950 so now the code just undefines EX_OK before #including unistd.h.
1952 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1953 in the smtp transport. When a block could not be written in a single
1954 write() function, the timeout was being re-applied to each part-write.
1955 This seems wrong - if the receiver was accepting one byte at a time it
1956 would take for ever. The timeout is now adjusted when this happens. It
1957 doesn't have to be particularly precise.
1959 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1960 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1962 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1963 without a domain if the check to <postmaster@domain> fails.
1965 SC/01 Eximstats: added -xls and the ability to specify output files
1966 (patch written by Frank Heydlauf).
1968 SC/02 Eximstats: use FileHandles for outputing results.
1970 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1972 SC/04 Eximstats: fixed display of large numbers with -nvr option
1974 SC/05 Eximstats: fixed merging of reports with empty tables.
1976 SC/06 Eximstats: added the -include_original_destination flag
1978 SC/07 Eximstats: removed tabs and trailing whitespace.
1980 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1982 TK/06 MBOX spool code: Add real "From " MBOX separator line
1983 so the .eml file is really in mbox format (even though
1984 most programs do not really care). Patch from Alex Miller.
1986 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1987 The latter is generated from $received_to and is only set if the
1988 message has one envelope recipient. SA can use these headers,
1989 obviously out-of-the-box. Patch from Alex Miller.
1991 PH/08 The ${def test on a variable was returning false if the variable's
1992 value was "0", contrary to what the specification has always said!
1993 The result should be true unless the variable is empty.
1995 PH/09 The syntax error of a character other than { following "${if
1996 def:variable_name" (after optional whitespace) was not being diagnosed.
1997 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1998 accidental colon was present, for example, could give incorrect results.
2000 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2001 result is used (not including appendfile, where other changes are about
2004 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2005 This involved changing a lot of size variables from int to off_t. It
2006 should work with maildirs and everything.
2008 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2009 spamd dying while we are connected to it.
2011 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2014 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2015 function for BDB 4.3.
2017 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2019 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2020 the sources for PCRE have been re-arranged and more files are now
2023 PH/15 The code I had for printing potentially long long variables in PH/11
2024 above was not the best (it lost precision). The length of off_t variables
2025 is now inspected at build time, and an appropriate printing format (%ld
2026 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2027 to be "long long int" or "long int". This is needed for the internal
2028 formatting function string_vformat().
2030 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2031 the configuration file to be ":syslog", then the script "guesses" where
2032 the logs files are, rather than using the compiled in default. In our
2033 case the guess is not the same as the compiled default, so the script
2034 suddenly stopped working when I started to use syslog. The patch checks
2035 to see if log_file_path is "". If so, it attempts to read it from exim
2036 with no configuration file to get the compiled in version, before it
2037 falls back to the previous guessing code."
2039 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2040 implementing BATV in an Exim configuration. See NewStuff for the gory
2043 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2044 Makefile that are specific to HP-UX.
2046 PH/18 If the "use_postmaster" option was set for a recipient callout together
2047 with the "random" option, the postmaster address was used as the MAIL
2048 FROM address for the random test, but not for the subsequent recipient
2049 test. It is now used for both.
2051 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2052 patch removes a few documentation additions to RFC 3028, because the
2053 latest draft now contains them. It adds the new en;ascii-case comparator
2054 and a new error check for 8bit text in MIME parts. Comparator and
2055 require names are now matched exactly. I enabled the subaddress
2056 extension, but it is not well tested yet (read: it works for me)."
2058 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2059 rework some of the code of TK/09 above to avoid the hardwired use of
2060 "%lld" and "long long". Replaced the call to snprintf() with a call to
2063 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2064 records point to non-existent hosts", "retry timeout exceeded", and
2065 "retry time not reached for any host after a long failure period".
2067 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2068 experimental DomainKeys support:
2070 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2071 (2) On an error such as an illegally used "control", the wrong name for
2072 the control was given.
2074 These problems did NOT occur unless DomainKeys support was compiled.
2076 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2078 PH/24 Added ${if match_ip condition.
2080 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2081 databases so that it will be absolutely obvious if a crash occurs in the
2082 DB library. This is a regular occurrence (often caused by mis-matched
2085 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2086 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2087 picked up on a user's system that detects such things. There doesn't seem
2088 to be a gcc warning option for this - only an attribute that has to be
2089 put on the function's prototype. It seems that in Fedora Core 4 they have
2090 set this on a number of new functions. No doubt there will be more in due
2093 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2094 specify a transport. However, if an address that was verified by such a
2095 router was the subject of a callout, Exim crashed because it tried to
2096 read the rcpt_include_affixes from the non-existent transport. Now it
2097 just assumes that the setting of that option is false. This bug was
2098 introduced by 4.51/PH/31.
2100 PH/28 Changed -d+all to exclude +memory, because that information is very
2101 rarely of interest, but it makes the output a lot bigger. People tend to
2102 do -d+all out of habit.
2104 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2105 code in os-type was giving problems when libc.so lives in lib64, like on
2108 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2109 aren't the modern standard, and it seems that some systems' include files
2110 don't always have them. Exim was already checking for some of the newer
2111 ones like T_AAAA, and defining it itself. I've added checks for all the
2112 record types that Exim uses.
2114 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2115 not automatically generating a new one, as it is supposed to. This
2116 prevented TLS from working. If the file did exist, but contained invalid
2117 data, a new version was generated, as expected. It was only the case of a
2118 non-existent file that was broken.
2120 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2121 with a change in libdomainkeys > 0.64.
2123 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2124 from DNS. If the selector record carries the flag, it now has
2125 precedence over the domain-wide flag.
2127 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2129 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2130 the use of a port name that isn't defined in /etc/services) occurred, the
2131 message was deferred as in a normal delivery, and thus remained on the
2132 spool, instead of being failed because of the mua_wrapper setting. This
2133 is now fixed, and I tidied up some of the mua_wrapper messages at the
2136 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2137 the messages in a hash of arrays rather than using individual hashes.
2138 This is a bit cleaner and results in dramatic memory savings, albeit
2139 at a slight CPU cost.
2141 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2142 as requested by Marc Sherman.
2144 SC/10 Eximstats: added histograms for user specified patterns as requested
2147 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2149 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2150 fopen() in the content-scanning modules that did not already have it.
2156 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2157 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2159 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2161 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2163 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2164 to test Sieve filters that use "vacation".
2166 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2167 that changes the way the GnuTLS parameters are stored in the cache file.
2168 The new format can be generated externally. For backward compatibility,
2169 if the data in the cache doesn't make sense, Exim assumes it has read an
2170 old-format file, and it generates new data and writes a new file. This
2171 means that you can't go back to an older release without removing the
2174 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2175 work if there are any delivery delays because "one_time" forces the
2176 parent to be marked "delivered", so its unseen clone is never tried
2177 again. For this reason, Exim now forbids the simultaneous setting of
2180 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2181 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2182 entry if you want to know the details. The fix, however, neglected to
2183 consider the case when local delivery batching is involved. The test for
2184 "previously delivered" was not happening when checking to see if an
2185 address could be batched with a previous (undelivered) one; under
2186 certain circumstances this could lead to multiple deliveries to the same
2189 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2190 in its include files, and this causes problems building Exim.
2192 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2193 header_syntax) but Exim was just ignoring anything given after a slash.
2194 In particular, this caused confusion with an attempt to use "verify =
2195 reverse_host_lookup/defer_ok". An error is now given when options are
2196 supplied for verify items that do not have them. (Maybe reverse_host_
2197 lookup should have a defer_ok option, but that's a different point.)
2199 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2200 defined by RFC 821) to 2048, because there were problems with some AUTH
2201 commands, and RFC 1869 says the size should be increased for extended
2202 SMTP commands that take arguments.
2204 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2207 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2208 "unknown" error; now it says that the functionality isn't in the binary.
2210 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2211 an address' error message when a string expansion fails (syntax or
2212 whatever). Otherwise the password may appear in the log. Following change
2213 PH/42 below, there is no longer a chance of it appearing in a bounce
2216 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2218 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2219 of its addresses was ever tried. (Bugzilla bug #2.)
2221 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2222 the result incorrectly in the debug output. (It correctly added a newline
2223 to what was transported.)
2225 TF/01 Added $received_time.
2227 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2228 commented out examples of how to interface to a virus scanner and to
2229 SpamAssassin. Also added commented examples of av_scanner and
2230 spamd_address settings.
2232 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2233 and controls are allowed in which ACLs. There were a couple of minor
2234 errors. Some of the entries in the conditions table (which is a table of
2235 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2236 negation of where the condition IS allowed.
2238 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2240 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2241 header file does not have a version number, so I've had to invent a new
2242 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2243 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2244 radiusclient), but it was contributed by a Radius user.
2246 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2247 files or directories, for OpenSSL.
2249 PH/19 When an Exim process that is running as root has to create an Exim log
2250 file, it does so in a subprocess that runs as exim:exim so as to get the
2251 ownership right at creation (otherwise, other Exim processes might see
2252 the file with the wrong ownership). There was no test for failure of this
2253 fork() call, which would lead to the process getting stuck as it waited
2254 for a non-existent subprocess. Forks do occasionally fail when resources
2255 run out. I reviewed all the other calls to fork(); they all seem to check
2258 PH/20 When checking for unexpected SMTP input at connect time (before writing
2259 the banner), Exim was not dealing correctly with a non-positive return
2260 from the read() function. If the client had disconnected by this time,
2261 the result was a log entry for a synchronization error with an empty
2262 string after "input=" when read() returned zero. If read() returned -1
2263 (an event I could not check), uninitialized data bytes were printed.
2264 There were reports of junk text (parts of files, etc) appearing after
2267 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2269 PH/22 Added support for macro redefinition, and (re)definition in between
2270 driver and ACL definitions.
2272 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2273 forgetting to use the resulting value; it was using the unexpanded value.
2275 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2276 hadn't been configured. The fix is from Juergen Kreileder, who
2277 understands it better than I do:
2279 "Here's what I see happening with three configured cyrus_sasl
2280 authenticators configured (plain, login, cram-md5):
2282 On startup auth_cyrus_sasl_init() gets called for each of these.
2283 This means three calls to sasl_listmech() without a specified mech_list.
2284 => SASL tests which mechs of all available mechs actually work
2285 => three warnings about OTP not working
2286 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2288 With the patch, sasl_listmech() also gets called three times. But now
2289 SASL's mech_list option is set to the server_mech specified in the the
2290 authenticator. Or in other words, the answer from sasl_listmech()
2291 gets limited to just the mech you're testing for (which is different
2293 => the return list contains just 'plain' or 'login', 'cram-md5' or
2294 nothing depending on the value of ob->server_mech.
2296 I've just tested the patch: Authentication still works fine,
2297 unavailable mechs specified in the exim configuration are still
2298 caught, and the auth.log warnings about OTP are gone."
2300 PH/25 When debugging is enabled, the contents of the command line are added
2301 to the debugging output, even when log_selector=+arguments is not
2304 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2305 answer is "GNU", and only if the return is "GNU/something" is the answer
2308 PH/27 $acl_verify_message is now set immediately after the failure of a
2309 verification in an ACL, and so is available in subsequent modifiers. In
2310 particular, the message can be preserved by coding like this:
2312 warn !verify = sender
2313 set acl_m0 = $acl_verify_message
2315 Previously, $acl_verify_message was set only while expanding "message"
2316 and "log_message" when a very denied access.
2318 PH/28 Modified OS/os.c-Linux with
2320 -#ifndef OS_LOAD_AVERAGE
2321 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2323 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2324 nomenclature these days.)
2326 PH/29 Installed patch from the Sieve maintainer that adds the options
2327 sieve_useraddress and sieve_subaddress to the redirect router.
2329 PH/30 In these circumstances:
2330 . Two addresses routed to the same list of hosts;
2331 . First host does not offer TLS;
2332 . First host accepts first address;
2333 . First host gives temporary error to second address;
2334 . Second host offers TLS and a TLS session is established;
2335 . Second host accepts second address.
2336 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2337 and peerdn, if requested) that were in fact used only for the second
2340 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2341 attention to any local part prefix or suffix that was matched by the
2342 router that accepted the address. It now behaves in the same way as it
2343 does for delivery: the affixes are removed from the local part unless
2344 rcpt_include_affixes is set on the transport.
2346 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2347 timeout during the DATA phase of an incoming message.
2349 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2350 applied a patch sanctioned by the Sieve maintainer.
2352 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2353 the uid or gid is negative. A case of a negative gid caused this to be
2354 noticed. The fix allows for either to be negative.
2356 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2357 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2360 PH/36 The change PH/12 above was broken. Fixed it.
2362 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2363 the grounds that routing the same address twice would always produce the
2364 same answer. This might have been true once, but it is certainly no
2365 longer true now. Routing a child address may depend on the previous
2366 routing that produced that child. Some complicated redirection strategies
2367 went wrong when messages had multiple recipients, and made Exim's
2368 behaviour dependent on the order in which the addresses were given.
2370 I have moved the duplicate checking until after the routing is complete.
2371 Exim scans the addresses that are assigned to local and remote
2372 transports, and removes any duplicates. This means that more work will be
2373 done, as duplicates will always all be routed, but duplicates are
2374 presumably rare, so I don't expect this is of any significance.
2376 For deliveries to pipes, files, and autoreplies, the duplicate checking
2377 still happens during the routing process, since they are not going to be
2380 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2381 It corrects a timeout issue with spamd. This is Ian's comment: "The
2382 background is that sometimes spamd either never reads data from a
2383 connection it has accepted, or it never writes response data. The exiscan
2384 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2385 blindly assumes that writes won't block so it may never time out."
2387 PH/39 Allow G after quota size as well as K and M.
2389 PH/40 The value set for $authenticated_id in an authenticator may not contain
2390 binary zeroes or newlines because the value is written to log lines and
2391 to spool files. There was no check on this. Now the value is run through
2392 the string_printing() function so that such characters are converted to
2393 printable escape sequences.
2395 PH/41 $message_linecount is a new variable that contains the total number of
2396 lines in the message. Compare $body_linecount, which is the count for the
2399 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2400 bounce and delay warning messages, except in certain special cases, which
2403 (a) An SMTP error message from a remote host;
2404 (b) A message specified in a :fail: redirection;
2405 (c) A message specified in a "fail" command in a system filter;
2406 (d) A message specified in a FAIL return from the queryprogram router;
2407 (e) A message specified by the cannot_route_message router option.
2409 In these cases only, Exim does include the error details in bounce and
2410 warning messages. There are also a few cases where bland messages such
2411 as "unrouteable address" or "local delivery error" are given.
2413 PH/43 $value is now also set for the "else" part of a ${run expansion.
2415 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2416 being worked on, but at least Exim now implements the latest version to
2419 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2420 process to complete was treated as a delivery failure, a timeout while
2421 writing the message to the pipe was logged, but erroneously treated as a
2422 successful delivery. Such timeouts include transport filter timeouts. For
2423 consistency with the overall process timeout, these timeouts are now
2424 treated as errors, giving rise to delivery failures by default. However,
2425 there is now a new Boolean option for the pipe transport called
2426 timeout_defer, which, if set TRUE, converts the failures into defers for
2427 both kinds of timeout. A transport filter timeout is now identified in
2430 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2431 systems where "make" and "gmake" are different, calling "gmake" at top
2432 level broke things. I've arranged for the value of $(MAKE) to be passed
2433 from the Makefile to this script so that it can call the same version of
2437 A note about Exim versions 4.44 and 4.50
2438 ----------------------------------------
2440 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2441 changes of various kinds. As a consequence, a big documentation update was
2442 needed. This delayed the release for rather longer than seemed good, especially
2443 in the light of a couple of (minor) security issues. Therefore, the changes
2444 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2445 release. So 4.44 and 4.50 are in effect two different branches that both start
2448 I have left the 4.50 change log unchanged; it contains all the changes since
2449 4.43. The change log for 4.44 is below; many of its items are identical to
2450 those for 4.50. This seems to be the most sensible way to preserve the
2451 historical information.
2457 1. Minor wording change to the doc/README.SIEVE file.
2459 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2460 computation of the current number of files was incorrect.
2462 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2463 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2466 4. Give more explanation in the error message when the command for a transport
2467 filter fails to execute.
2469 5. There are several places where Exim runs a non-Exim command in a
2470 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2471 was being done only for the command run by the queryprogram router. It is
2472 now done for all such subprocesses. The other cases are: ${run, transport
2473 filters, and the commands run by the lmtp and pipe transports.
2475 6. Added CONFIGURE_GROUP build-time option.
2477 7. Some older OS have a limit of 256 on the maximum number of file
2478 descriptors. Exim was using setrlimit() to set 1000 as a large value
2479 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2480 systems. I've change it so that if it can't get 1000, it tries for 256.
2482 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2483 was an oversight, and furthermore, ever since the addition of extra
2484 controls (e.g. 4.43/32), the checks on when to allow different forms of
2485 "control" were broken. There should now be diagnostics for all cases when a
2486 control that does not make sense is encountered.
2488 9. Added the /retain_sender option to "control=submission".
2490 10. $recipients is now available in the predata ACL (oversight).
2492 11. Tidy the search cache before the fork to do a delivery from a message
2493 received from the command line. Otherwise the child will trigger a lookup
2494 failure and thereby defer the delivery if it tries to use (for example) a
2495 cached ldap connection that the parent has called unbind on.
2497 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2498 of $address_data from the recipient verification was clobbered by the
2499 sender verification.
2501 13. The value of address_data from a sender verification is now available in
2502 $sender_address_data in subsequent conditions in the ACL statement.
2504 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2506 15. Added a new option "connect=<time>" to callout options, to set a different
2509 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2510 was its contents. (It was OK if the option was not defined at all.)
2512 17. A "Completed" log line is now written for messages that are removed from
2513 the spool by the -Mrm option.
2515 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2516 information about exactly what failed.
2518 19. Added -dd to debug only the daemon process.
2520 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2521 handles timeouts, both on the server side and network timeouts. Renamed the
2522 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2524 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2525 It is now set to "smtps".
2527 22. $host_address is now set to the target address during the checking of
2528 ignore_target_hosts.
2530 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2531 being passed; this would have caused $sender_host_name to have been used if
2532 matching the list had actually called for a host name (not very likely,
2533 since this list is usually IP addresses). A host name is now passed as
2536 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2537 code that specifies a non-restarting handler (typically sigaction() in
2538 modern systems) in an attempt to fix a rare and obscure crash bug.
2540 25. Narrowed the window for a race in the daemon that could cause it to ignore
2541 SIGCHLD signals. This is not a major problem, because they are used only to
2542 wake it up if nothing else does.
2544 26. A malformed maildirsize file could cause Exim to calculate negative values
2545 for the mailbox size or file count. Odd effects could occur as a result.
2546 The maildirsize information is now recalculated if the size or filecount
2549 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2550 support for a long time. Removed HAVE_SYS_VFS_H.
2552 28. Installed the latest version of exipick from John Jetmore.
2554 29. In an address list, if the pattern was not a regular expression, an empty
2555 subject address (from a bounce message) matched only if the pattern was an
2556 empty string. Non-empty patterns were not even tested. This was the wrong
2557 because it is perfectly reasonable to use an empty address as part of a
2558 database query. An empty address is now tested by patterns that are
2559 lookups. However, all the other forms of pattern expect the subject to
2560 contain a local part and a domain, and therefore, for them, an empty
2561 address still always fails if the pattern is not itself empty.
2563 30. Exim went into a mad DNS loop when attempting to do a callout where the
2564 host was specified on an smtp transport, and looking it up yielded more
2565 than one IP address.
2567 31. Re-factored the code for checking spool and log partition space into a
2568 function that finds that data and another that does the check. The former
2569 is then used to implement four new variables: $spool_space, $log_space,
2570 $spool_inodes, and $log_inodes.
2572 32. The RFC2047 encoding function was originally intended for short strings
2573 such as real names; it was not keeping to the 75-character limit for
2574 encoded words that the RFC imposes. It now respects the limit, and
2575 generates multiple encoded words if necessary. To be on the safe side, I
2576 have increased the buffer size for the ${rfc2047: expansion operator from
2579 33. It is now permitted to omit both strings after an "if" condition; if the
2580 condition is true, the result is "true". As before, when the second string
2581 is omitted, a false condition yields an empty string. This makes it less
2582 cumbersome to write custom ACL and router conditions.
2584 34. Failure to deliver a bounce message always caused it to be frozen, even if
2585 there was an errors_to setting on the router. The errors_to setting is now
2588 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2589 canonical form (fully expanded) before being placed in
2590 $sender_host_address.
2592 36. The table in the code that translates DNS record types into text (T_A to
2593 "A" for instance) was missing entries for NS and CNAME. It is just possible
2594 that this could have caused confusion if both these types were looked up
2595 for the same domain, because the text type is used as part of Exim's
2596 per-process caching. But the chance of anyone hitting this buglet seems
2599 37. The dnsdb lookup has been extended in a number of ways.
2601 (1) There is a new type, "zns", which walks up the domain tree until it
2602 finds some nameserver records. It should be used with care.
2604 (2) There is a new type, "mxh", which is like "mx" except that it returns
2605 just the host names, not the priorities.
2607 (3) It is now possible to give a list of domains (or IP addresses) to be
2608 looked up. The behaviour when one of the lookups defers can be
2609 controlled by a keyword.
2611 (4) It is now possible to specify the separator character for use when
2612 multiple records are returned.
2614 38. The dnslists ACL condition has been extended: it is now possible to supply
2615 a list of IP addresses and/or domains to be looked up in a particular DNS
2618 39. Added log_selector=+queue_time_overall.
2620 40. When running the queue in the test harness, wait just a tad after forking a
2621 delivery process, to get repeatability of debugging output.
2623 41. Include certificate and key file names in error message when GnuTLS fails
2624 to set them up, because the GnuTLS error message doesn't include the name
2625 of the failing file when there is a problem reading it.
2627 42. Allow both -bf and -bF in the same test run.
2629 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2631 44. The "Exiscan patch" is now merged into the mainline Exim source.
2633 45. Sometimes the final signoff response after QUIT could fail to get
2634 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2635 < 0 before doing a fflush(). This bug looks as though it goes back to the
2636 introduction of TLS in release 3.20, but "sometimes" must have been rare
2637 because the tests only now provoked it.
2639 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2640 (this can affect the format of dates).
2642 47. exim_tidydb, when checking for the continued existence of a message for
2643 which it has found a message-specific retry record, was not finding
2644 messages that were in split spool directories. Consequently, it was
2645 deleting retry records that should have stayed in existence.
2647 48. Steve fixed some bugs in eximstats.
2649 49. The SPA authentication driver was not abandoning authentication and moving
2650 on to the next authenticator when an expansion was forced to fail,
2651 contradicting the general specification for all authenticators. Instead it
2652 was generating a temporary error. It now behaves as specified.
2654 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2655 (the order specifies the preference for clients). The order is now AES256,
2656 AES128, 3DES, ARCFOUR128.
2658 51. Small patch to Sieve code - explicitly set From: when generating an
2661 52. Exim crashed if a remote delivery caused a very long error message to be
2662 recorded - for instance if somebody sent an entire SpamAssassin report back
2663 as a large number of 550 error lines. This bug was coincidentally fixed by
2664 increasing the size of one of Exim's internal buffers (big_buffer) that
2665 happened as part of the Exiscan merge. However, to be on the safe side, I
2666 have made the code more robust (and fixed the comments that describe what
2669 53. Now that there can be additional text after "Completed" in log lines (if
2670 the queue_time_overall log selector is set), a one-byte patch to exigrep
2671 was needed to allow it to recognize "Completed" as not the last thing in
2674 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2675 patch that reportedly fixes this has been added. I am not expert enough to
2676 create a test for it. This is what the patch creator wrote:
2678 "I found a little strange behaviour of ldap code when working with
2679 Windows 2003 AD Domain, where users was placed in more than one
2680 Organization Units. When I tried to give exim partial DN, the exit code
2681 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2682 But simultaneously result of request was absolutely normal ldap result,
2683 so I produce this patch..."
2685 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2686 REFERENCE, so I have modified the code to exclude the patch when that macro
2689 55. Some experimental protocols are using DNS PTR records for new purposes. The
2690 keys for these records are domain names, not reversed IP addresses. The
2691 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2692 leaves it alone. Component reversal etc. now happens only for IP addresses.
2695 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2697 57. Double the size of the debug message buffer (to 2048) so that more of very
2698 long debug lines gets shown.
2700 58. The exicyclog utility now does better if the number of log files to keep
2701 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2703 59. Two changes related to the smtp_active_hostname option:
2705 (1) $smtp_active_hostname is now available as a variable.
2706 (2) The default for smtp_banner uses $smtp_active_hostname instead
2707 of $primary_hostname.
2709 60. The host_aton() function is supposed to be passed a string that is known
2710 to be a valid IP address. However, in the case of IPv6 addresses, it was
2711 not checking this. This is a hostage to fortune. Exim now panics and dies
2712 if the condition is not met. A case was found where this could be provoked
2713 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2714 components; fortuitously, this particular loophole had already been fixed
2715 by change 4.50/55 above.
2717 If there are any other similar loopholes, the new check in host_aton()
2718 itself should stop them being exploited. The report I received stated that
2719 data on the command line could provoke the exploit when Exim was running as
2720 exim, but did not say which command line option was involved. All I could
2721 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2722 running as the user.
2725 61. There was a buffer overflow vulnerability in the SPA authentication code
2726 (which came originally from the Samba project). I have added a test to the
2727 spa_base64_to_bits() function which I hope fixes it.
2730 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2731 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2733 63. The daemon start-up calls getloadavg() while still root for those OS that
2734 need the first call to be done as root, but it missed one case: when
2735 deliver_queue_load_max is set with deliver_drop_privilege. This is
2736 necessary for the benefit of the queue runner, because there is no re-exec
2737 when deliver_drop_privilege is set.
2739 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2740 This has been fixed.
2742 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2743 was in use, was not putting the data itself into the right store pool;
2744 consequently, it could be overwritten for a subsequent message in the same
2745 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2748 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2750 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2751 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2752 the function were treating the return as a boolean value, which happened to
2753 work because 0=false and not-0=true, but is not correct code.
2755 68. The host_aton() function was not handling scoped IPv6 addresses (those
2756 with, for example, "%eth0" on the end) correctly.
2758 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2759 negated items (that is, ~something) in unsigned ints. Some compilers
2760 apparently mutter when there is no cast.
2762 70. If an address verification called from an ACL failed, and did not produce a
2763 user-specific message (i.e. there was only a "system" message), nothing was
2764 put in $acl_verify_message. In this situation, it now puts the system
2767 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2768 session; change 4.31/43 added the unwanted input to the log line - except
2769 that it did not do this in the start of session case. It now does.
2771 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2772 This is wrong and can cause the other end to generate a synchronization
2773 error if it is another Exim or anything else that does the synchronization
2774 check. A QUIT command is no longer sent after a timeout.
2776 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2777 during host lookups.
2779 74. The defer_ok option of callout verification was not working if it was used
2780 when verifying addresses in header lines, that is, for this case:
2782 verify = header_sender/callout=defer_ok
2784 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2785 those file descriptors could be used for SMTP connections. If anything
2786 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2787 could be sent to the SMTP client, causing chaos. The daemon now opens
2788 stdin, stdout, and stderr to /dev/null when it puts itself into the
2791 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2792 log by default. The user can override this with suitable Perl magic.
2794 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2795 the log message when discard triggers, was not working for the DATA ACL or
2796 for the non-SMTP ACL.
2798 78. Error message wording change in sieve.c.
2800 79. If smtp_accept_max_per_host was set, the number of connections could be
2801 restricted to fewer than expected, because the daemon was trying to set up
2802 a new connection before checking whether the processes handling previous
2803 connections had finished. The check for completed processes is now done
2804 earlier. On busy systems, this bug wouldn't be noticed because something
2805 else would have woken the daemon, and it would have reaped the completed
2808 80. If a message was submitted locally by a user whose login name contained one
2809 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2810 It caused a spool format error. I have fixed the spool reading code. A
2811 related problem was that the "from" clause in the Received: line became
2812 illegal because of the space(s). It is now covered by ${quote_local_part.
2814 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2817 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2819 83. Patch from Sieve maintainer to fix unterminated string problem in
2820 "vacation" handling.
2822 84. Some minor changes to the Linux configuration files to help with other
2823 OS variants using glibc.
2825 85. One more patch for Sieve to update vacation handling to latest spec.
2828 ----------------------------------------------------
2829 See the note above about the 4.44 and 4.50 releases.
2830 ----------------------------------------------------
2836 1. Change 4.43/35 introduced a bug that caused file counts to be
2837 incorrectly computed when quota_filecount was set in an appendfile
2840 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2841 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2844 3. Give more explanation in the error message when the command for a transport
2845 filter fails to execute.
2847 4. There are several places where Exim runs a non-Exim command in a
2848 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2849 was being done only for the command run by the queryprogram router. It is
2850 now done for all such subprocesses. The other cases are: ${run, transport
2851 filters, and the commands run by the lmtp and pipe transports.
2853 5. Some older OS have a limit of 256 on the maximum number of file
2854 descriptors. Exim was using setrlimit() to set 1000 as a large value
2855 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2856 systems. I've change it so that if it can't get 1000, it tries for 256.
2858 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2859 was an oversight, and furthermore, ever since the addition of extra
2860 controls (e.g. 4.43/32), the checks on when to allow different forms of
2861 "control" were broken. There should now be diagnostics for all cases when a
2862 control that does not make sense is encountered.
2864 7. $recipients is now available in the predata ACL (oversight).
2866 8. Tidy the search cache before the fork to do a delivery from a message
2867 received from the command line. Otherwise the child will trigger a lookup
2868 failure and thereby defer the delivery if it tries to use (for example) a
2869 cached ldap connection that the parent has called unbind on.
2871 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2872 of $address_data from the recipient verification was clobbered by the
2873 sender verification.
2875 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2876 was its contents. (It was OK if the option was not defined at all.)
2878 11. A "Completed" log line is now written for messages that are removed from
2879 the spool by the -Mrm option.
2881 12. $host_address is now set to the target address during the checking of
2882 ignore_target_hosts.
2884 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2885 being passed; this would have caused $sender_host_name to have been used if
2886 matching the list had actually called for a host name (not very likely,
2887 since this list is usually IP addresses). A host name is now passed as
2890 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2891 code that specifies a non-restarting handler (typically sigaction() in
2892 modern systems) in an attempt to fix a rare and obscure crash bug.
2894 15. Narrowed the window for a race in the daemon that could cause it to ignore
2895 SIGCHLD signals. This is not a major problem, because they are used only to
2896 wake it up if nothing else does.
2898 16. A malformed maildirsize file could cause Exim to calculate negative values
2899 for the mailbox size or file count. Odd effects could occur as a result.
2900 The maildirsize information is now recalculated if the size or filecount
2903 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2904 support for a long time. Removed HAVE_SYS_VFS_H.
2906 18. Updated exipick to current release from John Jetmore.
2908 19. Allow an empty sender to be matched against a lookup in an address list.
2909 Previously the only cases considered were a regular expression, or an
2912 20. Exim went into a mad DNS lookup loop when doing a callout where the
2913 host was specified on the transport, if the DNS lookup yielded more than
2916 21. The RFC2047 encoding function was originally intended for short strings
2917 such as real names; it was not keeping to the 75-character limit for
2918 encoded words that the RFC imposes. It now respects the limit, and
2919 generates multiple encoded words if necessary. To be on the safe side, I
2920 have increased the buffer size for the ${rfc2047: expansion operator from
2923 22. Failure to deliver a bounce message always caused it to be frozen, even if
2924 there was an errors_to setting on the router. The errors_to setting is now
2927 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2928 canonical form (fully expanded) before being placed in
2929 $sender_host_address.
2931 24. Updated eximstats to version 1.33
2933 25. Include certificate and key file names in error message when GnuTLS fails
2934 to set them up, because the GnuTLS error message doesn't include the name
2935 of the failing file when there is a problem reading it.
2937 26. Expand error message when OpenSSL has problems setting up cert/key files.
2940 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2941 (this can affect the format of dates).
2943 28. exim_tidydb, when checking for the continued existence of a message for
2944 which it has found a message-specific retry record, was not finding
2945 messages that were in split spool directories. Consequently, it was
2946 deleting retry records that should have stayed in existence.
2948 29. eximstats updated to version 1.35
2949 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2950 1.35 - bugfix such that pie charts by volume are generated correctly
2952 30. The SPA authentication driver was not abandoning authentication and moving
2953 on to the next authenticator when an expansion was forced to fail,
2954 contradicting the general specification for all authenticators. Instead it
2955 was generating a temporary error. It now behaves as specified.
2957 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2958 (the order specifies the preference for clients). The order is now AES256,
2959 AES128, 3DES, ARCFOUR128.
2961 31. Small patch to Sieve code - explicitly set From: when generating an
2964 32. Exim crashed if a remote delivery caused a very long error message to be
2965 recorded - for instance if somebody sent an entire SpamAssassin report back
2966 as a large number of 550 error lines. This bug was coincidentally fixed by
2967 increasing the size of one of Exim's internal buffers (big_buffer) that
2968 happened as part of the Exiscan merge. However, to be on the safe side, I
2969 have made the code more robust (and fixed the comments that describe what
2972 33. Some experimental protocols are using DNS PTR records for new purposes. The
2973 keys for these records are domain names, not reversed IP addresses. The
2974 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2975 leaves it alone. Component reversal etc. now happens only for IP addresses.
2978 34. The host_aton() function is supposed to be passed a string that is known
2979 to be a valid IP address. However, in the case of IPv6 addresses, it was
2980 not checking this. This is a hostage to fortune. Exim now panics and dies
2981 if the condition is not met. A case was found where this could be provoked
2982 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2983 components; fortuitously, this particular loophole had already been fixed
2984 by change 4.50/55 or 4.44/33 above.
2986 If there are any other similar loopholes, the new check in host_aton()
2987 itself should stop them being exploited. The report I received stated that
2988 data on the command line could provoke the exploit when Exim was running as
2989 exim, but did not say which command line option was involved. All I could
2990 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2991 running as the user.
2994 35. There was a buffer overflow vulnerability in the SPA authentication code
2995 (which came originally from the Samba project). I have added a test to the
2996 spa_base64_to_bits() function which I hope fixes it.
2999 36. The daemon start-up calls getloadavg() while still root for those OS that
3000 need the first call to be done as root, but it missed one case: when
3001 deliver_queue_load_max is set with deliver_drop_privilege. This is
3002 necessary for the benefit of the queue runner, because there is no re-exec
3003 when deliver_drop_privilege is set.
3005 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3006 was in use, was not putting the data itself into the right store pool;
3007 consequently, it could be overwritten for a subsequent message in the same
3008 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3011 38. Sometimes the final signoff response after QUIT could fail to get
3012 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3013 < 0 before doing a fflush(). This bug looks as though it goes back to the
3014 introduction of TLS in release 3.20, but "sometimes" must have been rare
3015 because the tests only now provoked it.
3021 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3022 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3023 Now it returns an integer. A number of calls were still expecting a T/F
3024 return. Fortuitously, in all cases, the tests worked in OK situations,
3025 which is the norm. However, things would have gone wrong on any write
3026 failures on the smtp file descriptor. This function is used when sending
3027 messages over SMTP and also when doing verify callouts.
3029 2. When Exim is called to do synchronous delivery of a locally submitted
3030 message (the -odf or -odi options), it no longer closes stderr before doing
3033 3. Implemented the mua_wrapper option.
3035 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3037 5. Implemented the functions header_remove(), header_testname(),
3038 header_add_at_position(), and receive_remove_recipient(), and exported them
3041 6. If an ACL "warn" statement specified the addition of headers, Exim already
3042 inserted X-ACL-Warn: at the start if there was no header name. However, it
3043 was not making this test for the second and subsequent header lines if
3044 there were newlines in the string. This meant that an invalid header could
3045 be inserted if Exim was badly configured.
3047 7. Allow an ACL "warn" statement to add header lines at the start or after all
3048 the Received: headers, as well as at the end.
3050 8. Added the rcpt_4xx retry error code.
3052 9. Added postmaster_mailfrom=xxx to callout verification option.
3054 10. Added mailfrom=xxxx to the callout verification option, for verify=
3057 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3058 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3060 12. Inserted some casts to stop certain compilers warning when using pointer
3061 differences as field lengths or precisions in printf-type calls (mostly
3062 affecting debugging statements).
3064 13. Added optional readline() support for -be (dynamically loaded).
3066 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3067 same clock tick as a message's arrival, so that its received time was the
3068 same as the "first fail" time on the retry record, and that message
3069 remained on the queue past the ultimate address timeout, every queue runner
3070 would try a delivery (because it was past the ultimate address timeout) but
3071 after another failure, the ultimate address timeout, which should have then
3072 bounced the address, did not kick in. This was a "< instead of <=" error;
3073 in most cases the first failure would have been in the next clock tick
3074 after the received time, and all would be well.
3076 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3077 being recognized when the domain list was tested by the match_domain
3078 condition in an expansion string.
3080 16. Added the ${str2b64: operator.
3082 17. Exim was always calling setrlimit() to set a large limit for the number of
3083 processes, without checking whether the existing limit was already
3084 adequate. (It did check for the limit on file descriptors.) Furthermore,
3085 errors from getrlimit() and setrlimit() were being ignored. Now they are
3086 logged to the main and panic logs, but Exim does carry on, to try to do its
3087 job under whatever limits there are.
3089 18. Imported PCRE 5.0.
3091 19. Trivial typo in log message " temporarily refused connection" (the leading
3094 20. If the log selector return_path_on_delivery was set and an address was
3095 redirected to /dev/null, the delivery process crashed because it assumed
3096 that a return path would always be set for a "successful" delivery. In this
3097 case, the whole delivery is bypassed as an optimization, and therefore no
3100 21. Internal re-arrangement: the function for sending a challenge and reading
3101 a response while authentication was assuming a zero-terminated challenge
3102 string. It's now changed to take a pointer and a length, to allow for
3103 binary data in such strings.
3105 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3107 23. Exim was not respecting finduser_retries when seeking the login of the
3108 uid under which it was called; it was always trying 10 times. (The default
3109 setting of finduser_retries is zero.) Also, it was sleeping after the final
3110 failure, which is pointless.
3112 24. Implemented tls_on_connect_ports.
3114 25. Implemented acl_smtp_predata.
3116 26. If the domain in control=submission is set empty, Exim assumes that the
3117 authenticated id is a complete email address when it generates From: or
3118 Sender: header lines.
3120 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3121 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3122 chown and chgrp in /bin and hostname in /usr/bin.
3124 28. Exim was keeping the "process log" file open after each use, just as it
3125 does for the main log. This opens the possibility of it remaining open for
3126 long periods when the USR1 signal hits a daemon. Occasional processlog
3127 errors were reported, that could have been caused by this. Anyway, it seems
3128 much more sensible not to leave this file open at all, so that is what now
3131 29. The long-running daemon process does not normally write to the log once it
3132 has entered its main loop, and it closes the log before doing so. This is
3133 so that log files can straightforwardly be renamed and moved. However,
3134 there are a couple of unusual error situations where the daemon does write
3135 log entries, and I had neglected to close the log afterwards.
3137 30. The text of an SMTP error response that was received during a remote
3138 delivery was being truncated at 512 bytes. This is too short for some of
3139 the long messages that one sometimes sees. I've increased the limit to
3142 31. It is now possible to make retry rules that apply only when a message has a
3143 specific sender, in particular, an empty sender.
3145 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3146 it possible to be selective about when SMTP synchronization is enforced.
3148 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3150 32. Implemented hosts_connection_nolog.
3152 33. Added an ACL for QUIT.
3154 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3157 35. Added mailbox_size and mailbox_filecount to appendfile.
3159 36. Added control = no_multiline_responses to ACLs.
3161 37. There was a bug in the logic of the code that waits for the clock to tick
3162 in the case where the clock went backwards by a substantial amount such
3163 that the microsecond fraction of "now" was more than the microsecond
3164 fraction of "then" (but the whole seconds number was less).
3166 38. Added support for the libradius Radius client library this is found on
3167 FreeBSD (previously only the radiusclient library was supported).
3173 1. When certain lookups returned multiple values in the form name=value, the
3174 quoting of the values was not always being done properly. Specifically:
3175 (a) If the value started with a double quote, but contained no whitespace,
3177 (b) If the value contained whitespace other than a space character (i.e.
3178 tabs or newlines or carriage returns) it was not quoted.
3179 This fix has been applied to the mysql and pgsql lookups by writing a
3180 separate quoting function and calling it from the lookup code. The fix
3181 should probably also be applied to nisplus, ibase and oracle lookups, but
3182 since I cannot test any of those, I have not disturbed their existing code.
3184 2. A hit in the callout cache for a specific address caused a log line with no
3185 reason for rejecting RCPT. Now it says "Previous (cached) callout
3186 verification failure".
3188 3. There was an off-by-one bug in the queryprogram router. An over-long
3189 return line was truncated at 256 instead of 255 characters, thereby
3190 overflowing its buffer with the terminating zero. As well as fixing this, I
3191 have increased the buffer size to 1024 (and made a note to document this).
3193 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3194 when Exim is waiting for an SMTP response from a remote server, Exim
3195 restarts its select() call on the socket, thereby resetting its timeout.
3196 This is not a problem when such interrupts are rare. Somebody set up a cron
3197 job to run exiwhat every 2 minutes, which is less than the normal select()
3198 timeout (5 or 10 minutes). This meant that the select() timeout never
3199 kicked in because it was always reset. I have fixed this by comparing the
3200 time when an interrupt arrives with the time at the start of the first call
3201 to select(). If more time than the timeout has elapsed, the interrupt is
3202 treated as a timeout.
3204 5. Some internal re-factoring in preparation for the addition of Sieve
3205 extensions (by MH). In particular, the "personal" test is moved to a
3206 separate function, and given an option for scanning Cc: and Bcc: (which is
3207 not set for Exim filters).
3209 6. When Exim created an email address using the login of the caller as the
3210 local part (e.g. when creating a From: or Sender: header line), it was not
3211 quoting the local part when it contained special characters such as @.
3213 7. Installed new OpenBSD configuration files.
3215 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3216 try to make them clearer.
3218 9. Callout options, other than the timeout value, were being ignored when
3219 verifying sender addresses in header lines. For example, when using
3221 verify = header_sender/callout=no_cache
3223 the cache was (incorrectly) being used.
3225 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3226 only the Cygwin environment.
3228 11. When return_path_on_delivery was set as a log selector, if different remote
3229 addresses in the same message used different return paths and parallel
3230 remote delivery occurred, the wrong values would sometimes be logged.
3231 (Whenever a remote delivery process finished, the return path value from
3232 the most recently started remote delivery process was logged.)
3234 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3235 lines when AUTH and/or TLS are in use. This is the "received protocol"
3236 field. Exim used to use "asmtp" for authenticated SMTP, without any
3237 indication (in the protocol name) for TLS use. Now it follows the RFC and
3238 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3239 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3240 names appear in log lines as well as in Received: header lines.
3242 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3243 extensions, and comparison tests, and to fix some bugs.
3245 14. Changes to the "personal" filter test:
3247 (1) The test was buggy in that it was just doing the equivalent of
3248 "contains" tests on header lines. For example, if a user's address was
3249 anne@some.where, the "personal" test would incorrectly be true for
3251 To: susanne@some.where
3253 This test is now done by extracting each address from the header in turn,
3254 and checking the entire address. Other tests that are part of "personal"
3255 are now done using regular expressions (for example, to check local parts
3256 of addresses in From: header lines).
3258 (2) The list of non-personal local parts in From: addresses has been
3259 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3260 taken from the Sieve specification recommendations.
3262 (3) If the message contains any header line starting with "List-" it is
3263 treated as non-personal.
3265 (4) The test for "circular" in the Subject: header line has been removed
3266 because it now seems ill-conceived.
3268 15. Minor typos in src/EDITME comments corrected.
3270 16. Installed latest exipick from John Jetmore.
3272 17. If headers_add on a router specified a text string that was too long for
3273 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3274 of string_sprintf() is now avoided.
3276 18. $message_body_size was not set (it was always zero) when running the DATA
3277 ACL and the local_scan() function.
3279 19. For the "mail" command in an Exim filter, no default was being set for
3280 the once_repeat time, causing a random time value to be used if "once" was
3281 specified. (If the value happened to be <= 0, no repeat happened.) The
3282 default is now 0s, meaning "never repeat". The "vacation" command was OK
3283 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3284 (I found it when inspecting the code).
3286 20. There is now an overall timeout for performing a callout verification. It
3287 defaults to 4 times the callout timeout, which applies to individual SMTP
3288 commands during the callout. The overall timeout applies when there is more
3289 than one host that can be tried. The timeout is checked before trying the
3290 next host. This prevents very long delays if there are a large number of
3291 hosts and all are timing out (e.g. when the network connections are timing
3292 out). The value of the overall timeout can be changed by specifying an
3293 additional sub-option for "callout", called "maxwait". For example:
3295 verify = sender/callout=5s,maxwait=20s
3297 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3298 to the end before writing, but this should make it even safer).
3300 22. Exim was forgetting that it had advertised PIPELINING for the second and
3301 subsequent messages on an SMTP connection. It was also not resetting its
3302 memory on STARTTLS and an internal HELO.
3304 23. When Exim logs an SMTP synchronization error within a session, it now
3305 records whether PIPELINING has been advertised or not.
3307 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3308 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3309 rather than long int.
3311 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3313 26. Added the never_mail option to autoreply.
3319 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3320 crash if the getsockname() call failed; this can happen if a connection is
3321 closed very soon after it is established. The problem was simply in the
3322 order in which certain operations were done, causing Exim to try to write
3323 to the SMTP stream before it had set up the file descriptor. The bug has
3324 been fixed by making things happen in the correct order.
3330 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3331 before the connection was closed, thus losing the rejection response.
3333 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3334 some early Solaris releases, but causes trouble in current releases where
3335 socklen_t is defined.
3337 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3340 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3343 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3344 that releasing the top of it at the end releases what was used for sub-
3345 expansions (unless the block got too big). However, discard this block if
3346 the first thing is a variable or header, so that we can use its block when
3347 it is dynamic (useful for very large $message_headers, for example).
3349 6. Lookups now cache *every* query, not just the most recent. A new, separate
3350 store pool is used for this. It can be recovered when all lookup caches are
3351 flushed. Lookups now release memory at the end of their result strings.
3352 This has involved some general refactoring of the lookup sources.
3354 7. Some code has been added to the store_xxx() functions to reduce the amount
3355 of flapping under certain conditions.
3357 8. log_incoming_interface used to affect only the <= reception log lines. Now
3358 it causes the local interface and port to be added to several more SMTP log
3359 lines, for example "SMTP connection from", and rejection lines.
3361 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3363 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3365 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3366 could be overwritten at the end of the current message (or the start of a
3367 new message if it was set in a HELO ACL). The value is now preserved for
3368 the duration of the SMTP connection.
3370 12. If a transport had a headers_rewrite setting, and a matching header line
3371 contained an unqualified address, that address was qualified, even if it
3372 did not match any rewriting rules. The underlying bug was that the values
3373 of the flags that permit the existence of unqualified sender and recipient
3374 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3375 non-local messages, and by -bnq for local messages) were not being
3376 preserved with the message after it was received.
3378 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3379 "next input=" as part of the text comprising the host identity instead of
3380 the correct text. The code was using the same buffer for two different
3381 strings. However, depending on which order the printing function evaluated
3382 its arguments, the bug did not always show up. Under Linux, for example, my
3383 test suite worked just fine.
3385 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3386 doesn't work with some older versions of Perl. It has been changed to "my",
3387 which in any case is probably the better facility to use.
3389 15. A really picky compiler found some instances of statements for creating
3390 error messages that either had too many or two few arguments for the format
3393 16. The size of the buffer for calls to the DNS resolver has been increased
3394 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3395 for addresses that have a lot of PTR records. This alleviates a problem; it
3396 does not fully solve it.
3398 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3399 buffer now truncates the list and logs the incident, which is the same
3400 action as happens when Exim is looking up a host name and its aliases.
3401 Previously in this situation something unpredictable would happen;
3402 sometimes it was "internal error: store_reset failed".
3404 18. If a server dropped the connection unexpectedly when an Exim client was
3405 using GnuTLS and trying to read a response, the client delivery process
3406 crashed while trying to generate an error log message.
3408 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3409 string, for example:
3411 warn message = H1: something\nH2: something
3413 the text was added as a single header line from Exim's point of view
3414 though it ended up OK in the delivered message. However, searching for the
3415 second and subsequent header lines using $h_h2: did not work. This has been
3416 fixed. Similarly, if a system filter added multiple headers in this way,
3417 the routers could not see them.
3419 20. Expanded the error message when iplsearch is called with an invalid key to
3420 suggest using net-iplsearch in a host list.
3422 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3423 ACLs are no longer actually imposed (and a message to that effect is
3426 22. If a "gecos" field in a passwd entry contained escaped characters, in
3427 particular, if it contained a \" sequence, Exim got it wrong when building
3428 a From: or a Sender: header from that name. A second bug also caused
3429 incorrect handling when an unquoted " was present following a character
3430 that needed quoting.
3432 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3433 was not being matched caselessly.
3435 24. Arranged for all hyphens in the exim.8 source to be escaped with
3438 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3439 properly. Recipient callout cache records were still being keyed to include
3440 the sender, even when use_sender was set false. This led to far more
3441 callouts that were necessary. The sender is no longer included in the key
3442 when use_sender is false.
3444 26. Added "control = submission" modifier to ACLs.
3446 27. Added the ${base62d: operator to decode base 62 numbers.
3448 28. dnsdb lookups can now access SRV records.
3450 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3451 the configuration file.
3453 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3454 (-v) mode. This makes the output for a verbose queue run more intelligible.
3456 31. Added a use_postmaster feature to recipient callouts.
3458 32. Added the $body_zerocount variable, containing the number of binary zero
3459 bytes in the message body.
3461 33. The time of last modification of the "new" subdirectory is now used as the
3462 "mailbox time last read" when there is a quota error for a maildir
3465 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3467 35. Added +ignore_unknown as a special item in host lists.
3469 36. Code for decoding IPv6 addresses in host lists is now included, even if
3470 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3471 address was recognized as an IP address, but was then not correctly decoded
3472 into binary, causing unexpected and incorrect effects when compared with
3479 1. Very minor rewording of debugging text in manualroute to say "list of
3480 hosts" instead of "hostlist".
3482 2. If verify=header_syntax was set, and a header line with an unqualified
3483 address (no domain) and a large number of spaces between the end of the
3484 name and the colon was received, the reception process suffered a buffer
3485 overflow, and (when I tested it) crashed. This was caused by some obsolete
3486 code that should have been removed. The fix is to remove it!
3488 3. When running in the test harness, delay a bit after writing a bounce
3489 message to get a bit more predictability in the log output.
3491 4. Added a call to search_tidyup() just before forking a reception process. In
3492 theory, someone could use a lookup in the expansion of smtp_accept_max_
3493 per_host which, without the tidyup, could leave open a database connection.
3495 5. Added the variables $recipient_data and $sender_data which get set from a
3496 lookup success in an ACL "recipients" or "senders" condition, or a router
3497 "senders" option, similar to $domain_data and $local_part_data.
3499 6. Moved the writing of debug_print from before to after the "senders" test
3502 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3503 problems for message scanning, either using a data ACL, or using
3504 local_scan() because the Received: header was not generated till after they
3505 were called (in order to set the time as the time of reception completion).
3506 I have revised the way this works. The header is now generated after the
3507 body is received, but before the ACL or local_scan() are called. After they
3508 are run, the timestamp in the header is updated.
3514 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3515 before starting a queue runner without re-exec. This happened only when
3516 deliver_drop_privilege was set or when the Exim user was set to root. The
3517 effect of the bug was that timeouts during subsequent deliveries caused
3518 crashes instead of being properly handled. The handler is now left at its
3519 default (and expected) setting.
3521 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3522 message, again when deliver_drop_privilege is set or Exim is run as root.
3523 The bug described in (1) was not present in this case, but the tidying up
3524 of the other signals was missing. I have made the two cases consistent.
3526 3. The ignore_target_hosts setting on a manualroute router was being ignored
3527 for hosts that were looked up using the /MX notation.
3529 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3532 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3533 operated on the sender address. After changing the $sender_address to <>
3534 for the sender address verify, Exim was re-instated it as the original
3535 (before rewriting) address, but remembering that it had rewritten it, so it
3536 wasn't rewriting it again. This bug also had the effect of breaking the
3537 sender address verification caching when the sender address was rewritten.
3539 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3540 This has been changed so that if the ip literal address matches
3541 ignore_target_hosts, the router declines.
3543 7. Added expansion conditions match_domain, match_address, and match_local_
3544 part (NOT match_host).
3546 8. The placeholder for the Received: header didn't have a length field set.
3548 9. Added code to Exim itself and to exim_lock to test for a specific race
3549 condition that could lead to file corruption when using MBX delivery. The
3550 issue is with the lockfile that is created in /tmp. If this file is removed
3551 after a process has opened it but before that process has acquired a lock,
3552 there is the potential for a second process to recreate the file and also
3553 acquire a lock. This could lead to two Exim processes writing to the file
3554 at the same time. The added code performs the same test as UW imapd; it
3555 checks after acquiring the lock that its file descriptor still refers to
3556 the same named file.
3558 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3559 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3562 11. Added the smtp_active_hostname option. If used, this will typically be made
3563 to depend on the incoming interface address. Because $interface_address is
3564 not set up until the daemon has forked a reception process, error responses
3565 that can happen earlier (such as "too many connections") no longer contain
3568 12. If an expansion in a condition on a "warn" statement fails because a lookup
3569 defers, the "warn" statement is abandoned, and the next ACL statement is
3570 processed. Previously this caused the whole ACL to be aborted.
3572 13. Added the iplsearch lookup type.
3574 14. Added ident_timeout as a log selector.
3576 15. Added tls_certificate_verified as a log selector.
3578 16. Added a global option tls_require_ciphers (compare the smtp transport
3579 option of the same name). This controls incoming TLS connections.
3581 17. I finally figured out how to make tls_require_ciphers do a similar thing
3582 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3583 before starting the TLS session.
3585 18. Tabs are now shown as \t in -bP output.
3587 19. If the log selector return_path_on_delivery was set, Exim crashed when
3588 bouncing a message because it had too many Received: header lines.
3590 20. If two routers both had headers_remove settings, and the first one included
3591 a superfluous trailing colon, the final name in the first list and the
3592 first name in the second list were incorrectly joined into one item (with a
3593 colon in the middle).
3599 1. Added -C and -D options to the exinext utility, mainly to make it easier
3600 to include in the automated testing, but these could be helpful when
3601 multiple configurations are in use.
3603 2. The exinext utility was not formatting the output nicely when there was
3604 an alternate port involved in the retry record key, nor when there was a
3605 message id as well (for retries that were specific to a specific message
3606 and a specific host). It was also confused by IPv6 addresses, because of
3607 the additional colons they contain. I have fixed the IPv4 problem, and
3608 patched it up to do a reasonable job for IPv6.
3610 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3611 delivery, the log line now contains "pipelined" if PIPELINING was used.
3613 4. An SMTP transport process used to panic and die if the bind() call to set
3614 an explicit outgoing interface failed. This has been changed; it is now
3615 treated in the same way as a connect() failure.
3617 5. A reference to $sender_host_name in the part of a conditional expansion
3618 that was being skipped was still causing a DNS lookup. This no longer
3621 6. The def: expansion condition was not recognizing references to header lines
3622 that used bh_ and bheader_.
3624 7. Added the _cache feature to named lists.
3626 8. The code for checking quota_filecount in the appendfile transport was
3627 allowing one more file than it should have been.
3629 9. For compatibility with Sendmail, the command line option
3637 and sets the incoming protocol and host name (for trusted callers). The
3638 host name and its colon can be omitted when only the protocol is to be set.
3639 Note the Exim already has two private options, -pd and -ps, that refer to
3640 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3641 "s", but I don't think that's a major issue.
3643 10. A number of refactoring changes to the code, none of which should affect
3646 (a) The number of logging options was getting close to filling up the
3647 32-bit word that was used as a bit map. I have split them into two classes:
3648 those that are passed in the argument to log_write(), and those that are
3649 only ever tested independently outside of that function. These are now in
3650 separate 32-bit words, so there is plenty of room for expansion again.
3651 There is no change in the user interface or the logging behaviour.
3653 (b) When building, for example, log lines, the code previously used a
3654 macro that called string_cat() twice, in order to add two strings. This is
3655 not really sufficiently general. Furthermore, there was one instance where
3656 it was actually wrong because one of the argument was used twice, and in
3657 one call a function was used. (As it happened, calling the function twice
3658 did not affect the overall behaviour.) The macro has been replaced by a
3659 function that can join an arbitrary number of extra strings onto a growing
3662 (c) The code for expansion conditions now uses a table and a binary chop
3663 instead of a serial search (which was left over from when there were very
3664 few conditions). Also, it now recognizes conditions like "pam" even when
3665 the relevant support is not compiled in: a suitably worded error message is
3666 given if an attempt is made to use such a condition.
3668 11. Added ${time_interval:xxxxx}.
3670 12. A bug was causing one of the ddress fields not to be passed back correctly
3671 from remote delivery subprocesses. The field in question was not being
3672 subsequently used, so this caused to problems in practice.
3674 13. Added new log selectors queue_time and deliver_time.
3676 14. Might have fixed a bug in maildirsizefile handling that threw up
3677 "unexpected character" debug warnings, and recalculated the data
3678 unnecessarily. In any case, I expanded the warning message to give more
3681 15. Added the message "Restricted characters in address" to the statements in
3682 the default ACL that block characters like @ and % in local parts.
3684 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3685 Three changes have been made:
3687 (a) There was a serious bug; a negative response to MAIL caused the whole
3688 recipient domain to be cached as invalid, thereby blocking all messages
3689 to all local parts at the same domain, from all senders. This bug has
3690 been fixed. The domain is no longer cached after a negative response to
3691 MAIL if the sender used is not empty.
3693 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3696 (c) A new callout option, "use_sender" has been added for people who want
3697 the modified behaviour.
3703 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3706 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3707 indeed breaks things for older releases.
3709 3. Added additional logging to the case where there is a problem reading data
3710 from a filter that is running in a subprocess using a pipe, in order to
3711 try to track down a specific problem.
3713 4. Testing facility fudge: when running in the test harness and attempting
3714 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3715 getting "No route to host". Convert this to a timeout.
3717 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3720 6. Some OS don't have socklen_t but use size_t instead. This affects the
3721 fifth argument of getsockopt() amongst other things. This is now
3722 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3723 can be set for individual OS. I have set it for SunOS5, OSF1, and
3724 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3725 some earlier ones do not.
3727 7. Change 4.30/15 was not doing the test caselessly.
3729 8. The standard form for an IPv6 address literal was being rejected by address
3730 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3731 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3732 this, as well as the form without the "IPv6" on the front (but only when
3733 address literals are enabled, of course).
3735 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3737 10. Exim crashed if a message with an empty sender address specified by -f
3738 encountered a router with an errors_to setting. This could be provoked only
3739 by a command such as
3743 where an empty string was supplied; "<>" did not hit this bug.
3745 11. Installed PCRE release 4.5.
3747 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3748 remained set. It is now erased.
3750 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3751 times from message ids (which are base 36 rather than the normal 62).
3753 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3754 were being counted as actual protocol errors, and logged if the log
3755 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3756 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3757 and DATA following a set of rejected RCPTs do not count as protocol errors.
3758 In other words, Exim assumes they were pipelined, though this may not
3759 actually be the case. Of course, in all cases the client gets an
3760 appropriate error code.
3762 15. If a lookup fails in an ACL condition, a message about the failure may
3763 be available; it is used if testing the ACL cannot continue, because most
3764 such messages specify what the cause of the deferral is. However, some
3765 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3766 that caused an old message to be retained and used if a later statement
3767 caused a defer, replacing the real cause of the deferral.
3769 16. If an IP address had so many PTR records that the DNS lookup buffer
3770 was not large enough to hold them, Exim could crash while trying to process
3771 the truncated data. It now detects and logs this case.
3773 17. Further to 4.21/58, another change has been made: if (and only if) the
3774 first line of a message (the first header line) ends with CRLF, a bare LF
3775 in a subsequent header line has a space inserted after it, so as not to
3776 terminate the header.
3778 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3779 unnecessarily, used atoi() instead of strtol(), and didn't check the
3780 termination when getting file sizes from file names by regex.
3782 19. Completely re-implemented the support for maildirsize files, in the light
3783 of a number of problems with the previous contributed implementation
3784 (4.30/29). In particular:
3786 . If the quota is zero, the maildirsize file is maintained, but no quota is
3789 . If the maildir directory does not exist, it is created before any attempt
3790 to write a maildirsize file.
3792 . The quota value in the file is just a cache; if the quota is changed in
3793 the transport, the new value overrides.
3795 . A regular expression is available for excluding directories from the
3798 20. The autoreply transport checks the characters in options that define the
3799 message's headers; it allows continued headers, but it was checking with
3800 isspace() after an embedded newline instead of explicitly looking for a
3803 21. If all the "regular" hosts to which an address was routed had passed their
3804 expiry times, and had not reached their retry times, the address was
3805 bounced, even if fallback hosts were defined. Now Exim should go on to try
3808 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3809 equivalent code in the SMTP transport. Some hosts send humungous responses
3810 to HELO/EHLO, more than 1024 it seems.
3812 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3813 gives compiler warnings in some environments. I've now done it "properly",
3816 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3817 (because of problems with the built-in one) was declared to return uschar *
3818 instead of char *, causing compiler failure.
3820 25. Fixed a file descriptor leak when processing alias/forward files.
3822 26. Fixed a minor format string issue in dbfn.c.
3824 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3826 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3827 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3830 29. When a sender address is verified, it is cached, to save repeating the test
3831 when there is more than one recipient in a message. However, when the
3832 verification involves a callout, it is possible for different callout
3833 options to be set for different recipients. It is too complicated to keep
3834 track of this in the cache, so now Exim always runs a verification when a
3835 callout is required, relying on the callout cache for the optimization.
3836 The overhead is duplication of the address routing, but this should not be
3839 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3840 to be verified with callout=postmaster, and the main callout worked but the
3841 postmaster check failed, the verification correctly failed. However, if a
3842 subsequent RCPT command asked for sender verification *without* the
3843 postmaster check, incorrect caching caused this verification also to fail,
3846 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3847 it was not caching the DNS options (qualify_single, search_parents) that
3848 were used when the lookup failed. A subsequent lookup with different
3849 options therefore always gave the same answer, though there were cases
3850 where it should not have. (Example: a "domains = !$mx_any" option on a
3851 dnslookup router: the "domains" option is always processed without any
3852 widening, but the router might have qualify_single set.) Now Exim uses the
3853 cached value only when the same options are set.
3855 32. Added John Jetmore's "exipick" utility to the distribution.
3857 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3858 than a timeout (e.g. a certificate is required, and is not provided), an
3859 Exim server now closes the connection immediately. Previously it waited for
3860 the client to close - but if the client is SSL, it seems that they each
3861 wait for each other, leading to a delay before one of them times out.
3863 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3864 maintained 0.8.x compatibility because I don't think many are using it, and
3865 it is clearly obsolete.
3867 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3870 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3871 client certificate was expired. A simple patch fixes this, though I don't
3872 understand the full logic of why the verify callback is called multiple
3875 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3876 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3877 which causes problems with some clients (such as the Certicom SSL Plus
3878 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3879 disables the coutermeasure allowing Eudora to connect."
3881 38. Exim was not checking that a write() to a log file succeeded. This could
3882 lead to Bad Things if a log got too big, in particular if it hit a file
3883 size limit. Exim now panics and dies if it cannot write to a log file, just
3884 as it does if it cannot open a log file.
3886 39. Modified OS/Makefile-Linux so that it now contains
3888 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3890 The two -D definitions ensure that Exim is compiled with large file
3891 support, which makes it possible to handle log files that are bigger than
3894 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3895 instance) a domain was checked against a named list that involved a lookup,
3896 causing $domain_data to be set, then another domain was checked against the
3897 same list, then the first domain was re-checked, the value of $domain_data
3898 after the final check could be wrong. In particular, if the second check
3899 failed, it could be set empty. This bug probably also applied to
3902 41. The strip_trailing_dot option was not being applied to the address given
3903 with the -f command-line option.
3905 42. The code for reading a message's header from the spool was incrementing
3906 $received_count, but never initializing it. This meant that the value was
3907 incorrect (doubled) while delivering a message in the same process in which
3908 it was received. In the most common configuration of Exim, this never
3909 happens - a fresh exec is done - but it can happen when
3910 deliver_drop_privilege is set.
3912 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3913 it now includes up to 150 characters of the unexpected data in the log
3916 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3917 and building data strings. The size of both of these buffers was 10 000
3918 bytes - far larger than anybody would *ever* want, thought I. Needless to
3919 say, somebody hit the limit. I have increased the maximum line length to
3920 20 000 and the maximum data length of concatenated lines to 100 000. I have
3921 also fixed two bugs, because there was no checking on these buffers. Tsk,
3922 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3923 buffer is too small.
3925 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3926 lsearch lookups. Now it does.
3928 46. When parsing a route_list item in a manualroute router, a fixed-length
3929 buffer was used for the list of hosts. I made this 1024 bytes long,
3930 thinking that nobody would ever have a list of hosts that long. Wrong.
3931 Somebody had a whole pile of complicated expansion conditions, and the
3932 string was silently truncated, leading to an expansion error. It turns out
3933 that it is easier to change to an unlimited length (owing to other changes
3934 that have happened since this code was originally written) than to build
3935 structure for giving a limitation error. The length of the item that
3936 expands into the list of hosts is now unlimited.
3938 47. The lsearch lookup could not handle data where the length of text line was
3939 more than 4095 characters. Such lines were truncated, leading to shortened
3940 data being returned. It should now handle lines of any length.
3942 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3943 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3946 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3947 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3948 no longer happens in comment lines. A list of replacements is now placed
3949 at the head of all of the source files, except those whose only change is
3950 to replace PERL_COMMAND in the very first #! line.
3952 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3953 messages on the queue, with a bottom-up merge sort, using code contributed
3954 by Michael Haardt. This should make operations like -bp somewhat faster on
3955 large queues. It won't affect queue runners, except when queue_run_in_order
3958 51. Installed eximstats 1.31 in the distribution.
3960 52. Added support for SRV lookups to the dnslookup router.
3962 53. If an ACL referred to $message_body or $message_body_end, the value was not
3963 reset for any messages that followed in the same SMTP session.
3965 54. The store-handling optimization for building very long strings was not
3966 differentiating between the different store pools. I don't think this
3967 actually made any difference in practice, but I've tidied it.
3969 55. While running the routers to verify a sender address, $sender_address
3970 was still set to the sender address. This is wrong, because when routing to
3971 send a bounce to the sender, it would be empty. Therefore, I have changed
3972 it so that, while verifying a sender address, $sender_address is set to <>.
3973 (There is no change to what happens when verifying a recipient address.)
3975 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3976 target A or AAAA records (if not already returned) without resetting the
3977 qualify_single or search_parents options of the DNS resolver. These are
3978 inappropriate in this case because the targets of MX and SRV records must
3979 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3980 target that, when qualified, matched something in the local domain. These
3981 two options are now turned off when doing these lookups.
3983 57. It seems that at least some releases of Reiserfs (which does not have the
3984 concept of a fixed number of inodes) returns zero and not -1 for the
3985 number of available inodes. This interacted badly with check_spool_inodes,
3986 which assumed that -1 was the "no such thing" setting. What I have done is
3987 to check that the total number of inodes is greater than zero before doing
3988 the test of how many are available.
3990 58. When a "warn" ACL statement has a log_message modifier, the message is
3991 remembered, and not repeated. This is to avoid a lot of repetition when a
3992 message has many recipients that cause the same warning to be written.
3993 Howewer, Exim was preserving the list of already written lines for an
3994 entire SMTP session, which doesn't seem right. The memory is now reset if a
3995 new message is started.
3997 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3998 debugging output unless log_rewrite was also set.
4000 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4001 of (int)(handle) when we know that handle contains (void *)(-1).
4003 61. The Exim daemon panic-logs an error return when it closes the incoming
4004 connection. However "connection reset by peer" seems to be common, and
4005 isn't really an error worthy of noting specially, so that particular error
4008 62. When Exim is trying to find all the local interfaces, it used to panic and
4009 die if the ioctl to get the interface flags failed. However, it seems that
4010 on at least one OS (Solaris 9) it is possible to have an interface that is
4011 included in the list of interfaces, but for which you get a failure error
4012 for this call. This happens when the interface is not "plumbed" into a
4013 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4014 failure of the "get flags" call assumes that the interface is down.
4016 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4017 makes life easier for people who are doing arithmetic on fields extracted
4018 from dates, where you often get leading zeros that should not be
4019 interpreted as octal.
4021 64. Added qualify_domain to the redirect router, to override the global
4024 65. If a pathologically long header line contained very many addresses (the
4025 report of this problem mentioned 10 000) and each of them was rewritten,
4026 Exim could use up a very large amount of memory. (It kept on making new
4027 copies of the header line as it rewrote, and never released the old ones.)
4028 At the expense of a bit more processing, the header rewriting function has
4029 been changed so that it no longer eats memory in this way.
4031 66. The generation of the Received: header has been moved from the time that a
4032 message starts to be received, to the time that it finishes. The timestamp
4033 in the Received: header should now be very close to that of the <= log
4034 line. There are two side-effects of this change:
4036 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4037 logged header lines no longer include the local Received: line, because
4038 it has not yet been created. The same applies to a copy of the message
4039 that is returned to a non-SMTP sender when a message is rejected.
4041 (b) When a filter file is tested using -bf, no additional Received: header
4042 is added to the test message. After some thought, I decided that this
4045 This change does not affect the value of $received_for. It is still set
4046 after address rewriting, but before local_scan() is called.
4048 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4050 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4051 gave an unhelpful panic error message, and a defer error. I have managed to
4052 change this behaviour so that it now rejects any supplied certificate,
4053 which seems right, as the list of acceptable certificates is empty.
4055 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4056 gave an unhelpful defer error. I have not managed to make this reject any
4057 supplied certificates, but the error message it gives is "no certificate
4058 supplied", which is not helpful.
4060 70. exigrep's output now also includes lines that are not associated with any
4061 message, but which match the given pattern. Implemented by a patch from
4062 Martin Sluka, which also tidied up the Perl a bit.
4064 71. Recipient callout verification, like sender verification, was using <> in
4065 the MAIL FROM command. This isn't really the right thing, since the actual
4066 sender may affect whether the remote host accepts the recipient or not. I
4067 have changed it to use the actual sender in the callout; this means that
4068 the cache record is now keyed on a recipient/sender pair, not just the
4069 recipient address. There doesn't seem to be a real danger of callout loops,
4070 since a callout by the remote host to check the sender would use <>.
4071 [SEE ABOVE: changed after hitting problems.]
4073 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4074 temporary errors. However, in the case of such a code being given after
4075 the end of a data transmission (i.e. after ".") Exim was failing to write
4076 a retry record for the message. (Yes, there was some broken host that was
4077 actually sending 8xx at this point.)
4079 73. An unknown lookup type in a host list could cause Exim to panic-die when
4080 the list was checked. (An example that provoked this was putting <; in the
4081 middle of a list instead of at the start.) If this happened during a DATA
4082 ACL check, a -D file could be left lying around. This kind of configuration
4083 error no longer causes Exim to die; instead it causes a defer errror. The
4084 incident is still logged to the main and panic logs.
4086 74. Buglet left over from Exim 3 conversion. The message "too many messages
4087 in one connection" was written to the rejectlog but not the mainlog, except
4088 when address rewriting (yes!) was being logged.
4090 75. Added write_rejectlog option.
4092 76. When a system filter was run not as root (that is, when system_filter_user
4093 was set), the values of the $n variables were not being returned to the
4094 main process; thus, they were not subsequently available in the $sn
4097 77. Added +return_path_on_delivery log selector.
4099 78. A connection timeout was being treated differently from recipients deferred
4100 when testing hosts_max_try with a message that was older than the host's
4101 retry timeout. (The host should not be counted, thus allowing all hosts to
4102 be tried at least once before bouncing.) This may have been the cause of an
4103 occasionally reported bug whereby a message would remain on the queue
4104 longer than the retry timeout, but would be bounced if a delivery was
4105 forced. I say "may" because I never totally pinned down the problem;
4106 setting up timeout/retry tests is difficult. See also the next item.
4108 79. The ultimate address timeout was not being applied to errors that involved
4109 a combination of host plus message (for example, a timeout on a MAIL
4110 command). When an address resolved to a number of possible hosts, and they
4111 were not all tried for each delivery (e.g. because of hosts_max_try), a
4112 message could remain on the queue longer than the retry timeout.
4114 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4117 81. Fixed an obscure SMTP outgoing bug which required at least the following
4118 conditions: (a) there was another message waiting for the same server;
4119 (b) the server returned 5xx to all RCPT commands in the first message so
4120 that the message was not completed; (c) the server dropped the connection
4121 or gave a negative response to the RSET that Exim sends to abort the
4122 transaction. The observed case was a dropped connection after DATA that had
4123 been sent in pipelining mode. That is, the server had advertised PIPELINING
4124 but was not implementing it correctly. The effect of the bug was incorrect
4125 behaviour, such as trying another host, and this could lead to a crash.
4131 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4132 and daemon.c were passed as pointers to ints; they should have been
4133 pointers to socklen_t variables (which are typically unsigned ints).
4135 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4138 3. Fixed a really odd bug that affected only the testing scheme; patching a
4139 certain fixed string in the binary changed the value of another string that
4140 happened to be identical to the end of the original first string.
4142 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4143 name", it returns that address as the IP address. On some operating
4144 systems (e.g. Solaris), it also passes back the IP address string as the
4145 "host name". However, on others (e.g. Linux), it passes back an empty
4146 string. Exim wasn't checking for this, and was changing the host name to an
4147 empty string, assuming it had been canonicized.
4149 5. Although rare, it is permitted to have more than one PTR record for a given
4150 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4151 all the names associated with an address, because they do in Solaris.
4152 However, it seems that they do not in Linux for data that comes from the
4153 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4154 I found this out when I moved to a new Linux workstation and tried to run
4155 the Exim test suite.
4157 To get round this problem I have changed the code so that it now does its
4158 own call to the DNS to look up PTR records when searching for a host name.
4159 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4160 addresses that are only in /etc/hosts are still found.
4162 This behaviour is, however, controlled by an option called host_lookup_
4163 order, which defaults to "bydns:byaddr". If people want to use the other
4164 order, or indeed, just use one or the other means of lookup, they can
4165 specify it in this variable.
4167 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4168 some operating systems, this comes back from gethostbyaddr() as an empty
4169 string, and this is what Exim used to test for. However, it seems that in
4170 other systems, "." is yielded. Exim now tests for this case too.
4172 7. The values of check_spool_space and check_log_space are now held internally
4173 as a number of kilobytes instead of an absolute number of bytes. If a
4174 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4175 kilobyte. This means that much larger values can be stored.
4177 8. Exim monitor: an attempt to get the action menu when not actually pointing
4178 at a message produces an empty menu entitled "No message selected". This
4179 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4180 no entries in it ("Shell widget menu has zero width and/or height"). So I
4181 have added a single, blank menu entry in this case.
4183 9. Added ${quote_local_part.
4185 10. MIME decoding is now applied to the contents of Subject: header lines when
4188 11. Now that a reference to $sender_host_address automatically causes a reverse
4189 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4190 host lookup before query-style lookups in lists that might use this
4191 variable. This has therefore been abolished, and the "net-" prefix is no
4192 longer necessary for query-style lookups.
4194 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4195 have been a typo for LFLAGS, so it has been changed.
4197 13. The install script calls Exim with "-C /dev/null" in order to find the
4198 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4199 to be output. Howeve, since Exim outputs its version number before the
4200 error, it didn't break the script. It just looked ugly. I fixed this by
4201 always allowing "-C /dev/null" if the caller is root.
4203 14. Ignore overlarge ACL variable number when reading spool file - insurance
4204 against a later release with more variables having written the file.
4206 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4207 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4208 this, as well as the form without the "IPv6" on the front.
4210 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4211 OS/Makefile-Darwin file.
4213 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4214 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4216 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4217 variable. However, some OS use ints for inodes. I've added cast to long int
4218 to get rid of the compiler warning.
4220 19. I had forgotten to lock out "/../" in configuration file names when
4221 ALT_CONFIG_PREFIX was set.
4223 20. Routers used for verification do not need to specify transports. However,
4224 if such a router generated a host list, and callout was configured, Exim
4225 crashed, because it could not find a port number from the (non-existent)
4226 transport. It now assumes port 25 in this circumstance.
4228 21. Added the -t option to exigrep.
4230 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4231 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4232 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4233 them is set, LOOKUP_LSEARCH is forced.
4235 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4237 24. Added sender and host information to the "rejected by local_scan()" log
4238 line; previously there was no indication of these.
4240 25. Added .include_if_exists.
4242 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4243 Linux. It turns out that not all file systems support this. Apparently some
4244 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4245 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4246 not supported on the file descriptor, is now ignored when Exim is trying to
4247 sync a directory. This applies only to Linux.
4249 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4251 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4252 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4255 29. Added support for maildirsize files from supplied patch (modified a bit).
4257 30. The use of :fail: followed by an empty string could lead Exim to respond to
4258 sender verification failures with (e.g.):
4260 550 Verification failed for <xxx>
4261 550 Sender verify failed
4263 where the first response line was missing the '-' that indicates it is not
4264 the final line of the response.
4266 31. The loop for finding the name of the user that called Exim had a hardwired
4267 limit of 10; it now uses the value of finduser_retries, which is used for
4268 all other user lookups.
4270 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4273 33. Exim was neglecting to zero errno before one call of strtol() when
4274 expanding a string and expecting an integer value. On some systems this
4275 resulted in spurious "integer overflow" errors. Also, it was casting the
4276 result into an int without checking.
4278 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4279 did not work. The code looks as if it has *never* worked, though it appears
4280 to have been documented since at least releast 1.62. I have made it work.
4282 35. The "timeout_DNS" error in retry rules, also documented since at least
4283 1.62, also never worked. As it isn't clear exactly what this means, and
4284 clearly it isn't a major issue, I have abolished the feature by treating it
4285 as "timeout", and writing a warning to the main and panic logs.
4287 36. The display of retry rules for -brt wasn't always showing the error code
4290 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4291 timeout_connect_A, timeout_connect_MX.
4293 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4294 to the empty sender.
4296 39. The daemon was not analysing the content of -oX till after it had closed
4297 stderr and disconnected from the controlling terminal. This meant that any
4298 syntax errors were only noted on the panic log, and the return code from
4299 the command was 0. By re-arranging the code a little, I've made the
4300 decoding happen first, so such errors now appear on stderr, and the return
4301 code is 1. However, the actual setting up of the sockets still happens in
4302 the disconnected process, so errors there are still only recorded on the
4305 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4306 connections (as happens on some IP stacks) was logged at start up time as
4307 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4308 it from "IPv6 and IPv4", which means that two separate sockets are being
4311 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4312 says whether AF_INET or AF_INET6 was passed as an argument.
4314 42. Exiwhat output was messed up when time zones were included in log
4317 43. Exiwhat now gives more information about the daemon's listening ports,
4318 and whether -tls-on-connect was used.
4320 44. The "port" option of the smtp transport is now expanded.
4322 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4323 silently ignored. Now an error message is written to the main and panic
4326 46. There's a new ACL modifier called "logwrite" which writes to a log file
4327 as soon as it is encountered.
4329 47. Added $local_user_uid and $local_user_gid at routing time.
4331 48. Exim crashed when trying to verify a sender address that was being
4334 49. Exim was recognizing only a space character after ".include". It now also
4335 recognizes a tab character.
4337 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4338 extracting the relevant information from the specification. The man page no
4339 longer contains scrambled data for the -d option, and I've added a section
4340 at the front about calling Exim under different names.
4342 51. Added "extra_headers" argument to the "mail" command in filter files.
4344 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4347 53. Installed eximstats 1.29.
4349 54. Added transport_filter_timeout as a generic transport option.
4351 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4352 Cc: header lines. This was required by RFC 822, but it not required by RFC
4355 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4356 incoming messages that did not have them. Now it does so only if the
4357 message originates locally, that is, if there is no associated remote host
4358 address. When Resent- header lines are present, this applies to the Resent-
4359 lines rather than the non-Resent- lines.
4361 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4362 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4364 58. Messages for configuration errors now include the name of the main
4365 configuration file - useful now that there may be more than one file in a
4366 list (.included file names were always shown).
4368 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4369 for those rare installations that do not start the daemon as root or run it
4370 setuid root. I've cut out the call to initgroups() if the daemon is not
4373 60. The Exim user and group can now be bound into the binary as text strings
4374 that are looked up at the start of Exim's processing.
4376 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4378 62. Added $mailstore_basename variable.
4380 63. Installed patch to sieve.c from Michael Haardt.
4382 64. When Exim failed to open the panic log after failing to open the main log,
4383 the original message it was trying to log was written to stderr and debug
4384 output, but if they were not available (the usual case in production), it
4385 was lost. Now it is written to syslog before the two lines that record the
4386 failures to open the logs.
4388 65. Users' Exim filters run in subprocesses under the user's uid. It is
4389 possible for a "deliver" command or an alias in a "personal" command to
4390 provoke an address rewrite. If logging of address rewriting is configured,
4391 this fails because the process is not running as root or exim. There may be
4392 a better way of dealing with this, but for the moment (because 4.30 needs
4393 to be released), I have disabled address rewrite logging when running a
4394 filter in a non-root, non-exim process.
4400 1. The buildconfig auxiliary program wasn't quoting the value set for
4401 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4402 not defined. This bug was masked in 4.22 by the effect that was fixed in
4405 2. Some messages that were rejected after a message id was allocated were
4406 shown as "incomplete" by exigrep. It no longer does this for messages that
4407 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4409 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4410 have allow_domain_literals set, the ID did not get logged in the <= line.
4411 Domain literals are now always recognized in Message-ID: header lines.
4413 4. The first argument for a ${extract expansion item is the key name or field
4414 number. Leading and trailing spaces in this item were not being ignored,
4415 causing some misleading effects.
4417 5. When deliver_drop_privilege was set, single queue runner processes started
4418 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4419 same command in the process it spins off) were not dropping privilege.
4421 6. When the daemon running as "exim" started a queue runner, it always
4422 re-executed Exim in the spun-off process. This is a waste of effort when
4423 deliver_drop_privilege is set. The new process now just calls the
4424 queue-runner function directly.
4430 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4433 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4434 ignored. Though the use of -oP was forcing the writing of a pid file, it
4435 was always written to the default place.
4437 3. If the message "no IP address found for host xxxx" is generated during
4438 incoming verification, it is now followed by identification of the incoming
4439 connection (so you can more easily find what provoked it).
4441 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4443 5. Added some features to "harden" Exim a bit more against certain attacks:
4445 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4446 be put in Local/Makefile. This is like the never_users runtime option,
4447 but it cannot be overridden. The default setting is "root".
4449 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4450 prefix string with which any file named in a -C command line option
4453 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4454 is retained for -C and -D only if the caller of Exim is root. Without
4455 it, the exim user may also use -C and -D and retain privilege.
4457 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4458 command line option is disabled.
4460 6. Macro names set by the -D option must start with an upper case letter, just
4461 like macro names defined in the configuration file.
4463 7. Added "dereference=" facility to LDAP.
4465 8. Two instances of the typo "uknown" in the source files are fixed.
4467 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4468 the Configure-Makefile script screwed up while processing it.
4470 10. Incorporated PCRE 4.4.
4472 11. The SMTP synchronization check was not operating right at the start of an
4473 SMTP session. For example, it could not catch a HELO sent before the client
4474 waited for the greeting. There is now a check for outstanding input at the
4475 point when the greeting is written. Because of the duplex, asynchronous
4476 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4477 way, but not yet received, when the check is performed.
4479 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4480 on TCP/IP sockets, because this apparently causes some broken clients to
4483 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4484 unchanged) from the Cygwin maintainer.
4486 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4487 was supported instead of testing for mbx. Effectively a typo.
4489 15. The spa authenticator server code was not checking that the input it
4490 received was valid base64.
4492 16. The debug output line for the "set" modifier in ACLs was not showing the
4493 name of the variable that was being set.
4495 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4497 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4498 lookup on its own. Something else was needed to trigger the lookup. For
4499 example, a match in host_lookup or the need for a host name in a host list.
4500 Now, if $sender_host_name is referenced and the host name has not yet been
4501 looked up, a lookup is performed. If the lookup fails, the variable remains
4502 empty, and $host_lookup_failed is set to "1".
4504 19. Added "eqi" as a case-independent comparison operator.
4506 20. The saslauthd authentication condition could segfault if neither service
4507 nor realm was specified.
4509 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4510 error message that was logged was misleading, and incoming SMTP
4511 connections were dropped. The message is now more accurate, and temporary
4512 errors are given to SMTP connections.
4514 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4515 (except RSET) with a 421 error, until QUIT is received. However, it was
4516 failing to send a response to QUIT.
4518 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4519 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4520 ACL is now run after the helo_try_verify_hosts code.
4522 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4523 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4524 case-independent, so other case variants are also recognized). Apparently
4525 some systems use these upper case variants.
4527 25. If more than two messages were waiting for the same host, and a transport
4528 filter was specified for the transport, Exim sent two messages over the
4529 same TCP/IP connection, and then failed with "socket operation on non-
4530 socket" when it tried to send the third.
4532 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4534 27. The extern definition of crypt16() in expand.c was not being excluded when
4535 the OS had its own crypt16() function.
4537 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4538 as a preferred synonym for return_size_limit, both as an option and as an
4541 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4543 30. Changed the default configuration ACL to relax the local part checking rule
4544 for addresses that are not in any local domains. For these addresses,
4545 slashes and pipe symbols are allowed within local parts, but the sequence
4546 /../ is explicitly forbidden.
4548 31. SPA server authentication was not clearing the challenge buffer before
4551 32. log_message in a "warn" ACL statement was writing to the reject log as
4552 well as to the main log, which contradicts the documentation and doesn't
4553 seem right (because no rejection is happening). So I have stopped it.
4555 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4556 However, I am unable to do any testing of this.
4558 34. Fixed an infelicity in the appendfile transport. When checking directories
4559 for a mailbox, to see if any needed to be created, it was accidentally
4560 using path names with one or more superfluous leading slashes; tracing
4561 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4563 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4564 contents are added to the log line that is written for every discarded
4565 recipient. (Previously a log_message setting was ignored.)
4567 36. The ${quote: operator now quotes the string if it is empty.
4569 37. The install script runs exim in order to find its version number. If for
4570 some reason other than non-existence or emptiness, which it checks, it
4571 could not run './exim', it was installing it with an empty version number,
4572 i.e. as "exim-". This error state is now caught, and the installation is
4575 38. An argument was missing from the function that creates an error message
4576 when Exim fails to connect to the socket for saslauthd authentication.
4577 This could cause Exim to crash, or give a corrupted message.
4579 39. Added isip, isip4, and isip6 to ${if conditions.
4581 40. The ACL variables $acl_xx are now saved with the message, and can be
4582 accessed later in routers, transports, and filters.
4584 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4585 strings in the file are not string-expanded.
4587 42. If a MAIL command specified a SIZE value that was too large to fit into an
4588 int variable, the check against message_size_limit failed. Such values are
4589 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4590 day this will have to be increased, but I don't think I want to be around
4591 when emails are that large.
4598 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4599 iconv() is not standard in FreeBSD.
4601 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4602 IPv6 enabled. The observed symptom was a segmentation fault on return from
4603 the function os_common_find_running_interfaces() in src/os.c.
4605 3. In the check_special_case() function in daemon.c I had used "errno" as an
4606 argument name, which causes warnings on some systems. This was basically a
4607 typo, since it was named "eno" in the comments!
4609 4. The code that waits for the clock to tick (at a resolution of some fraction
4610 of a second) so as to ensure message-id uniqueness was always waiting for
4611 at least one whole tick, when it could have waited for less. [This is
4612 almost certainly not relevant at current processor speeds, where it is
4613 unlikely to ever wait at all. But we try to future-proof.]
4615 5. The function that sleeps for a time interval that includes fractions of a
4616 second contained a race. It did not block SIGALRM between setting the
4617 timer, and suspending (a couple of lines later). If the interval was short
4618 and the sigsuspend() was delayed until after it had expired, the suspension
4619 never ended. On busy systems this could lead to processes getting stuck for
4622 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4623 process, before it forks any delivery processes. The open lookup caching
4624 mechanism meant that the open file or database connection was passed into
4625 the delivery process. The problem was that delivery processes always tidy
4626 up cached lookup data. This could cause a problem for the next delivery
4627 process started by the queue runner, because the external queue runner
4628 process does not know about the closure. So the next delivery process
4629 still has data in the lookup cache. In the case of a file lookup, there was
4630 no problem because closing a file descriptor in a subprocess doesn't affect
4631 the parent. However, if the lookup was caching a connection to a database,
4632 the connection was closed, and the second delivery process was likely to
4633 see errors such as "PGSQL: query failed: server closed the connection
4634 unexpectedly". The problem has been fixed by closing all cached lookups
4635 in a queue runner before running a delivery process.
4637 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4638 seem to have the "const" qualifier which it has on other OS. I've
4641 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4642 *of the same type* (client or server) with the same public name that an
4643 error should be diagnosed.
4645 9. When Exim looked up a host name for an IP address, but failed to find the
4646 original IP address when looking up the host name (a safety check), it
4647 output the message "<ip address> does not match any IP for NULL", which was
4648 confusing, to say the least. The bug was that the host name should have
4649 appeared instead of "NULL".
4651 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4652 user that is built into the binary, and the -C or -D options is used, root
4653 privilege is dropped before the configuration file is read. In addition,
4654 logging is switched to stderr instead of the normal log files. If the
4655 configuration then re-defines the Exim user, the unprivileged environment
4656 is probably not what is expected, so Exim logs a panic warning message (but
4659 However, if deliver_drop_privilege is set, the unprivileged state may well
4660 be exactly what is intended, so the warning has been cut out in that case,
4661 and Exim is allowed to try to write to its normal log files.
4667 1. smtp_return_error_details was not giving details for temporary sender
4668 or receiver verification errors.
4670 2. Diagnose a configuration error if two authenticators have the same public
4673 3. Exim used not to create the message log file for a message until the first
4674 delivery attempt. This could be confusing when incoming messages were held
4675 for policy or load reasons. The message log file is now created at the time
4676 the message is received, and an initial "Received" line is written to it.
4678 4. The automatically generated man page for command line options had a minor
4679 bug that caused no ill effects; however, a more serious problem was that
4680 the procedure for building the man page automatically didn't always
4681 operate. Consequently, release 4.20 contains an out-of-date version. This
4682 shouldn't happen again.
4684 5. When building Exim with embedded Perl support, the script that builds the
4685 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4686 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4688 6. The freeze_tell option was not being used for messages that were frozen on
4689 arrival, either by an ACL or by local_scan().
4691 7. Added the smtp_incomplete_transaction log selector.
4693 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4694 was accepting AUTH without a new EHLO.
4696 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4697 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4700 10. Logging of TCP/IP connections (when configured) now happens in the main
4701 daemon process instead of the child process, so that the TCP/IP connection
4702 count is more accurate (but it can never be perfect).
4704 11. The use of "drop" in a nested ACL was not being handled correctly in the
4705 outer ACL. Now, if condition failure induced by the nested "drop" causes
4706 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4707 or "require"), the connection is dropped.
4709 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4710 that yield "discard" can now be used with an "accept" or a "discard" verb,
4711 but an error is generated for any others (because I can't see a useful way
4712 to define what should happen).
4714 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4715 are now processed in the same way as lines in the Exim configuration file.
4716 In particular, continuation lines are supported.
4718 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4720 15. Added -ti meaning -t -i.
4722 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4723 domains, and warn by logging if others are found.
4725 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4726 returned from GIFCONF when Exim is trying to find the list of interfaces on
4727 a host. The code in os.c has been modified to copy each ifreq to an aligned
4728 structure in all cases.
4730 Also, in some cases, the returned ifreq's were being copied to a 'struct
4731 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4732 means the last couple of bytes of an IPv6 address could be chopped if the
4733 ifreq contained only a normal sockaddr (14 bytes storage).
4735 18. Named domain lists were not supported in the hosts_treat_as_local option.
4736 An entry such as +xxxx was not recognized, and was treated as a literal
4739 19. Ensure that header lines added by a DATA ACL are included in the reject log
4740 if the ACL subsequently rejects the message.
4742 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4743 MD5 (which is deprecated).
4745 21. When testing a filter file using -bf, Exim was writing a message when it
4746 took the sender from a "From " line in the message, but it was not doing so
4747 when it took $return_path from a Return-Path: header line. It now does.
4749 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4750 with a valid header line field name (a series of printing characters
4751 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4753 23. Changed "disc" in the source to "disk" to conform to the documentation and
4754 the book and for uniformity.
4756 24. Ignore Sendmail's -Ooption=value command line item.
4758 25. When execve() failed while trying to run a command in a pipe transport,
4759 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4760 could be confused with a return value of 69 from the command itself. This
4761 has been changed to 127, the value the shell returns if it is asked to run
4762 a non-existent command. The wording for the related log line suggests a
4763 non-existent command as the problem.
4765 26. If received_header_text expands to an empty string, do not add a Received:
4766 header line to the message. (Well, it adds a token one on the spool, but
4767 marks it "old" so that it doesn't get used or transmitted.)
4769 27. Installed eximstats 1.28 (addition of -nt option).
4771 28. There was no check for failure on the call to getsockname() in the daemon
4772 code. This can fail if there is a shortage of resources on the system, with
4773 ENOMEM, for example. A temporary error is now given on failure.
4775 29. Contrary to the C standard, it seems that in some environments, the
4776 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4777 program. Exim now does this explicitly; it affects the formatting of
4778 timestamps using strftime().
4780 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4781 complaints. I've now initialized all the variables, to avoid this.
4783 32. Header lines added by a system filter were not being "seen" during
4784 transport-time rewrites.
4786 33. The info_callback() function passed to OpenSSL is set up with type void
4787 (*)(SSL *, int, int), as described somewhere. However, when calling the
4788 function (actually a macro) that sets it up, the type void(*)() is
4789 expected. I've put in a cast to prevent warnings from picky compilers.
4791 34. If a DNS black list lookup found a CNAME record, but there were no A
4792 records associated with the domain it pointed at, Exim crashed.
4794 35. If a DNS black list lookup returned more than one A record, Exim ignored
4795 all but the first. It now scans all returned addresses if a particular IP
4796 value is being sought. In this situation, the contents of the
4797 $dnslist_value variable are a list of all the addresses, separated by a
4800 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4801 to accept a host name and all its aliases if the forward lookup for any of
4802 them yielded the IP address of the incoming connection. Now it accepts only
4803 those names whose forward lookup yields the correct IP address. Any other
4804 names are discarded. This closes a loophole whereby a rogue DNS
4805 administrator could create reverse DNS records to break through a
4806 wildcarded host restriction in an ACL.
4808 37. If a user filter or a system filter that ran in a subprocess used any of
4809 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4810 the wrong values were passed to the pipe command ($thisaddress had the
4811 value of $0, $0 had the value of $1, etc). This bug was introduced by
4812 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4814 38. Improved the line breaking for long SMTP error messages from ACLs.
4815 Previously, if there was no break point between 40 and 75 characters, Exim
4816 left the rest of the message alone. Two changes have been made: (a) I've
4817 reduced the minimum length to 35 characters; (b) if it can't find a break
4818 point between 35 and 75 characters, it looks ahead and uses the first one
4819 that it finds. This may give the occasional overlong line, but at least the
4820 remaining text gets split now.
4822 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4823 file descriptors might be low, and that setting 1000 would always raise it.
4824 It turns out that in some environments, the limit is already over 1000 and
4825 that lowering it causes trouble. So now Exim takes care not to decrease it.
4827 40. When delivering a message, the value of $return_path is set to $sender_
4828 address at the start of routing (routers may change the value). By an
4829 oversight, this default was not being set up when an address was tested by
4830 -bt or -bv, which affected the outcome if any router or filter referred to
4833 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4834 log only when "message" or "log_message" are set. However, if one of the
4835 conditions was an address verification, or a call to a nested ACL, the
4836 messages generated by the underlying test were being passed through. This
4837 no longer happens. The underlying message is available in $acl_verify_
4838 message for both "message" and "log_message" expansions, so it can be
4839 passed through if needed.
4841 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4842 new expansion $bh_ to give the encoded byte string without charset
4843 translation. Translation happens only if iconv() is available; HAVE_ICONV
4844 indicates this at build time. HEADERS_CHARSET gives the charset to
4845 translate to; headers_charset can change it in the configuration, and
4846 "headers charset" can change it in an individual filter file.
4848 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4849 that creates RFC 2047 encoded "words" labels them as that charset instead
4850 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4851 expansion operator; (ii) when Exim creates a From: line for a local
4852 message; (iii) when a header line is rewritten to include a "phrase" part.
4854 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4855 buggy, causing it to skip the first lines of messages whose message ID
4856 ended in 'D'. This would not have bitten before Exim release 4.14, because
4857 message IDs were unlikely to end in 'D' before then. The effect was to have
4858 incorrect size information for certain domains.
4860 45. #include "config.h" was missing at the start of the crypt16.c module. This
4861 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4864 46. If there was a timeout during a "random" callout check, Exim treated it as
4865 a failure of the random address, and carried on sending RSET and the real
4866 address. If the delay was just some slowness somewhere, the response to the
4867 original RCPT would be taken as a response to RSET and so on, causing
4868 mayhem of various kinds.
4870 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4871 when I implemented it. It didn't allow for the fact that some option values
4872 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4873 the right test for positive values.
4875 48. Domain names in DNS records are case-independent. Exim always looks them up
4876 in lower case. Some resolvers return domain names in exactly the case they
4877 appear in the zone file, that is, they may contain uppercase letters. Not
4878 all resolvers do this - some return always lower case. Exim was treating a
4879 change of case by a resolver as a change of domain, similar to a widening
4880 of a domain abbreviation. This triggered its re-routing code and so it was
4881 trying to route what was effectively the same domain again. This normally
4882 caused routing to fail (because the router wouldn't handle the domain
4883 twice). Now Exim checks for this case specially, and just changes the
4884 casing of the domain that it ultimately uses when it transmits the message
4887 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4890 50. If a filter generated a file delivery with a non-absolute name (possible if
4891 no home directory exists for the router), the forbid_file option was not
4894 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4895 the existing equality matching.
4897 52. Exim was using ints instead of ino_t variables in some places where it was
4898 dealing with inode numbers.
4900 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4901 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4902 called TMPDIR, and if it finds it is different, it changes its value.
4904 54. The smtp_printf() function is now made available to local_scan() so
4905 additional output lines can be written before returning. There is also an
4906 smtp_fflush() function to enable the detection of a dropped connection.
4907 The variables smtp_input and smtp_batched_input are exported to
4910 55. Changed the default runtime configuration: the message "Unknown user"
4911 has been removed from the ACL, and instead placed on the localuser router,
4912 using the cannot_route_message feature. This means that any verification
4913 failures that generate their own messages won't get overridden. Similarly,
4914 the "Unrouteable address" message that was in the ACL for unverifiable
4915 relay addresses has also been removed.
4917 56. Added hosts_avoid_esmtp to the smtp transport.
4919 57. The exicyclog script was not checking for the esoteric option
4920 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4921 will work only if exicyclog is run under the appropriate euid.
4923 58. Following a discussion on the list, the rules by which Exim recognises line
4924 endings on incoming messages have been changed. The -dropcr and drop_cr
4925 options are now no-ops, retained only for backwards compatibility. The
4926 following line terminators are recognized: LF CRLF CR. However, special
4927 processing applies to CR:
4929 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4930 nor a local message in the state where . is a terminator.
4932 (ii) If a bare CR is encountered in a header line, an extra space is added
4933 after the line terminator so as not to end the header. The reasoning
4934 behind this is that bare CRs in header lines are most likely either
4935 to be mistakes, or people trying to play silly games.
4937 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4938 was being incorrectly given as 18 bytes larger than it should have been.
4939 This is a VOB (very old bug).
4941 60. This may never have affected anything current, but just in case it has:
4942 When the local host is found other than at the start of a list of hosts,
4943 the local host, those with the same MX, and any that follow, are discarded.
4944 When the list in question was part of a longer list of hosts, the following
4945 hosts (not currently being processed) were also being discarded. This no
4946 longer happens. I'm not sure if this situation could ever has previously
4949 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4952 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4953 header. This is something that is recommended in a new Internet Draft, and
4954 is something that is documented as being done by Sendmail. There are two
4955 possible values. For messages generated by the autoreply transport, Exim
4958 Auto-Submitted: auto-replied
4960 whereas for all other generated messages (e.g. bounces) it adds
4962 Auto-Submitted: auto-generated
4964 63. The "personal" condition in filters now includes a test for the
4965 Auto-Submitted: header. If it contains the string "auto-" the message it
4966 not considered personal.
4968 64. Added rcpt_include_affixes as a generic transport option.
4970 65. Added queue_only_override (default true).
4972 66. Added the syslog_duplication option.
4974 67. If what should have been the first header line of a message consisted of
4975 a space followed by a colon, Exim was mis-interpreting it as a header line.
4976 It isn't of course - it is syntactically invalid and should therefore be
4977 treated as the start of the message body. The misbehaviour could have
4978 caused a number of strange effects, including loss of data in subsequent
4979 header lines, and spool format errors.
4981 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4982 client host had authenticated. This control can now be exercised by an ACL
4983 for more flexibility.
4985 69. By default, callouts do not happen when testing with -bh. There is now a
4986 variant, -bhc, which does actually run the callout code, including
4987 consulting and updating the callout cache.
4989 70. Added support for saslauthd authentication, courtesy of Alexander
4992 71. If statvfs() failed on the spool or log directories while checking their
4993 size for availability, Exim confusingly gave the error "space shortage".
4994 Furthermore, in debugging mode it crashed with a floating point exception.
4995 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4996 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4997 serious problem, Exim now writes to the main and panic logs when this
4998 happens, with details of the failure. It then refuses to accept the
4999 incoming message, giving the message "spool directory problem" or "log
5000 directory problem" with a 421 code for SMTP messages.
5002 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5003 0, 1, and 2 exist, because some OS complain for execs without them (see
5004 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5005 descriptors. However, the code omitted to check that the open succeeded,
5006 causing mysterious errors if for some reason the permissions on /dev/null
5007 got screwed. Now Exim writes a message to the main and panic logs, and
5008 bombs out if it can't open /dev/null.
5010 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5011 interact so that it is all more flexible. It is supposed to remain
5012 backwards compatible. Also added extra_local_interfaces.
5014 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5015 to bomb out with an assertion failure - to the client this appears as a
5016 connection drop. This problem occurs in the part of the code that was taken
5017 from the Samba project. Fortunately, the assertion is in a very simple
5018 function, so I have fixed this by reproducing the function inline in the
5019 one place where it is called, and arranging for authentication to fail
5020 instead of killing the process with assert().
5022 75. The SPA client code was not working when the server requested OEM rather
5023 than Unicode encoding.
5025 76. Added code to make require_files with a specific uid setting more usable in
5026 the case where statting the file as root fails - usually a non-root-mounted
5027 NFS file system. When this happens and the failure is EACCES, Exim now
5028 forks a subprocess and does the per-uid checking as the relevant uid.
5030 77. Added process_log_path.
5032 78. If log_file_path was not explicitly set, a setting of check_log_space or
5033 check_log_inodes was ignored.
5035 79. If a space check for the spool or log partitions fails, the incident is now
5036 logged. Of course, in the latter case the data may get lost...
5038 80. Added the %p formatting code to string_format() so that it can be used to
5039 print addresses in debug_print(). Adjusted all the address printing in the
5040 debugging in store.c to use %p rather than %d.
5042 81. There was a concern that a line of code in smtp_in.c could overflow a
5043 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5044 initially expressed, the concern was not well-founded, because trailing
5045 spaces are removed early. However, if the trailing spaces were followed by
5046 a NULL, they did not get removed, so the overflow was possible. Two fixes
5049 (a) I re-wrote the offending code in a cleaner fashion.
5050 (b) If an incoming SMTP command contains a NULL character, it is rejected
5053 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5054 runs initgroups(), so that if the Exim user is in any additional groups,
5055 they will be used during message reception.
5061 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob