1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.272 2005/12/12 11:02:44 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
17 PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
20 PH/03 Added disable_ipv6.
22 PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
33 PH/01 Two changes to the default runtime configuration:
35 (1) Move the checks for relay_from_hosts and authenticated clients from
36 after to before the (commented out) DNS black list checks.
38 (2) Add control=submission to the relay_from_hosts and authenticated
39 clients checks, on the grounds that messages accepted by these
40 statements are most likely to be submissions.
42 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
44 (1) Generate an error if the third argument for the ${prvs expansion is
47 (2) Treat a missing third argument of ${prvscheck as if it were an empty
50 (3) Reset the variables that are obtained from the first argument of
51 ${prvscheck and used in the second argument before leaving the code,
52 because their memory is reclaimed, so using them afterwards may do
55 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
56 one (it's much easier than Tom thought :-).
58 (5) Because of (4), we can now allow for the use of $prvscheck_result
59 inside the third argument.
61 PH/03 For some reason, the default setting of PATH when running a command from
62 a pipe transport was just "/usr/bin". I have changed it to
65 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
66 anything to be listed in the output from -bV.
68 PH/05 When a filter generated an autoreply, the entire To: header line was
69 quoted in the delivery log line, like this:
71 => >A.N.Other <ano@some.domain> <original@ddress> ...
73 This has been changed so that it extracts the operative address. There
74 may be more than one such address. If so, they are comma-separated, like
77 => >ano@some.domain,ona@other.domain <original@ddress> ...
79 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
80 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
81 not being looked up in the rDNS to get a host name, Exim was showing the
82 IP address twice in Received: lines, even though the IP addresses were
83 identical. For example:
85 Received: from [1.2.3.4] (helo=[1.2.3.4])
87 However, if the real host name was known, it was omitting the HELO data
88 if it matched the actual IP address. This has been tidied up so that it
89 doesn't show the same IP address twice.
91 PH/07 When both +timestamp and +memory debugging was on, the value given by
92 $tod_xxx expansions could be wrong, because the tod_stamp() function was
93 called by the debug printing, thereby overwriting the timestamp buffer.
94 Debugging no longer uses the tod_stamp() function when +timestamp is set.
96 PH/08 When the original message was included in an autoreply transport, it
97 always said "this is a copy of the message, including all the headers",
98 even if body_only or headers_only was set. It now gives an appropriate
101 PH/09 Applied a patch from the Sieve maintainer which:
103 o fixes some comments
104 o adds the (disabled) notify extension core
105 o adds some debug output for the result of if/elsif tests
106 o points to the current vacation draft in the documentation
107 and documents the missing references header update
111 o fixes a bug in processing the envelope test (when testing
112 multiple envelope elements, the last element determinted the
115 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
116 Electronic Mail") by including:
118 Auto-submitted: auto-generated
120 in the messages that it generates (bounce messages and others, such as
121 warnings). In the case of bounce messages for non-SMTP mesages, there was
122 also a typo: it was using "Auto_submitted" (underscore instead of
123 hyphen). Since every message generated by Exim is necessarily in response
124 to another message, thes have all been changed to:
126 Auto-Submitted: auto-replied
128 in accordance with these statements in the RFC:
130 The auto-replied keyword:
132 - SHOULD be used on messages sent in direct response to another
133 message by an automatic process,
135 - MUST NOT be used on manually-generated messages,
137 - MAY be used on Delivery Status Notifications (DSNs) and Message
138 Disposition Notifications (MDNs),
140 - MUST NOT be used on messages generated by automatic or periodic
141 processes, except for messages which are automatic responses to
144 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
145 to the default Received: header definition.
147 PH/12 Added log selector acl_warn_skipped (default on).
149 PH/13 After a successful wildlsearch lookup, discard the values of numeric
150 variables because (a) they are in the wrong storage pool and (b) even if
151 they were copied, it wouldn't work properly because of the caching.
153 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
154 checking when decoding. Apparently there are clients that generate
155 overlong encoded strings. Why am I not surprised?
157 PH/15 If the first argument of "${if match_address" was not empty, but did not
158 contain an "@" character, Exim crashed. Now it writes a panic log message
159 and treats the condition as false.
161 PH/16 In autoreply, treat an empty string for "once" the same as unset.
163 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
164 extension "envelope-auth". The code is finished and in agreement with
165 other implementations, but there is no documentation so far and in fact,
166 nobody wrote the draft yet. This extension is currently #undef'ed, thus
167 not changing the active code.
169 Print executed "if" and "elsif" statements when debugging is used. This
170 helps a great deal to understand what a filter does.
172 Document more things not specified clearly in RFC3028. I had all this
173 sorted out, when out of a sudden new issues came to my mind. Oops."
175 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
178 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
179 canonical form (as documented). However, after a host name lookup from
180 the IP address, check_host() was doing a simple string comparison with
181 addresses acquired from the DNS when checking that the found name did
182 have the original IP as one of its addresses. Since any found IPv6
183 addresses are likely to be in abbreviated form, the comparison could
184 fail. Luckily, there already exists a function for doing the comparison
185 by converting both addresses to binary, so now that is used instead of
188 PH/20 There was another similar case to PH/19, when a complete host name was
189 given in a host list; looking up its IP address could give an abbreviated
190 form, whereas the current host's name might or might not be abbreviated.
191 The same fix has been applied.
197 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
198 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
201 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
202 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
204 PH/03 Typo: missing ".o" in src/pcre/Makefile.
206 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
207 header line, restrict the check to what is listed in RFCs 2369 and 2929.
208 Also, for "Auto-Submitted", treat anything other than "no" as
209 non-personal, in accordance with RFC 3834. (Previously it treated
210 anything starting "auto-" as non-personal.)
212 TF/01 The control=submission/name=... option had a problem with syntax
213 errors if the name included a slash character. The /name= option
214 now slurps the rest of the string, so it can include any characters
215 but it must come last in the list of options (after /sender_retain
218 PH/05 Some modifications to the interface to the fake nameserver for the new
221 PH/06 Add ${if def:sender_address {(envelope-from <$sender_address>)\n\t}}
222 into the default Received: header string.
229 TK/01 Added the "success_on_redirect" address verification option. See
230 NewStuff for rationale and an example.
232 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
234 PH/02 Patch to exigrep to allow it to work on syslog lines.
236 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
237 fread() to skip over the body file's header line, because in Cygwin the
238 header line is locked and is inaccessible.
240 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
241 co-exist for some time) to make it clear that it is the Exim ID that is
242 referenced, not the Message-ID: header line.
244 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
245 string_format() function, because snprintf() does not exist on all
248 PH/06 The use of forbid_filter_existstest now also locks out the use of the
249 ${stat: expansion item.
251 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
252 protocol synchronization error", to keep the pedants happy.
254 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
255 well as for IRIX systems, when gcc is being used. See the host.c source
258 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
260 PH/10 Named domain lists were not working if used in a queue_smtp_domains
263 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
264 transport and to the smtp transport in LMTP mode.
266 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
268 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
269 run a filter in a subprocess. This could lead to confusion in subsequent
270 lookups in the parent process. There should also be a search_tidyup() at
271 the end of the subprocess.
273 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
274 only if the host matched helo_try_verify_hosts, which caused the
275 verification to occur when the EHLO/HELO command was issued. The ACL just
276 tested the remembered result. Now, if a previous verification attempt has
277 not happened, "verify = helo" does it there and then.
279 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
281 TK/03 Fix log output including CR from clamd.
283 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
284 exist provoked a memory error which could cause a segfault.
286 PH/15 Installed PCRE 6.2
288 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
290 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
291 of the problem. Specifically, suggested +O2 rather than +O1 for the
294 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
296 PH/20 If a delivery was routed to a non-standard port by means of an SRV
297 record, the port was not correctly logged when the outgoing_port log
298 selector was set (it logged the transort's default port).
300 PH/21 Added support for host-specific ports to manualroute, queryprogram,
301 fallback_hosts, and "hosts" in the smtp transport.
303 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
304 host errors such as "Connection refused".
306 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
307 authentication with radiusclient 0.4.9:
309 - Error returned from rc_read_config was caught wrongly
310 - Username/password not passed on to radius server due to wrong length.
312 The presumption is that some radiusclient API changes for 4.51/PH/17
313 were not taken care of correctly. The code is still untested by me (my
314 Linux distribution still has 0.3.2 of radiusclient), but it was
315 contributed by a Radius user.
317 PH/24 When doing a callout, the value of $domain wasn't set correctly when
318 expanding the "port" option of the smtp transport.
320 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
321 while reading a MIME header. Thanks to Tom Hughes for a patch.
323 PH/24 Include config.h inside local_scan.h so that configuration settings are
326 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
327 that in an ACL for RCPT (for example), you can examine exactly what was
330 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
331 commands, but it was not correctly comparing the address with the actual
332 client host address. Thus, it would show the EHLO address in Received:
333 header lines when this was not necessary.
335 PH/27 Added the % operator to ${eval:}.
337 PH/28 Exim tries to create and chdir to its spool directory when it starts;
338 it should be ignoring failures (because with -C, for example, it has lost
339 privilege). It wasn't ignoring creation failures other than "already
342 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
345 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
346 because an input line was too long, either on its own, or by virtue of
347 too many continuations, the temporary file was not being removed, and the
348 return code was incorrect.
350 PH/31 Missing "BOOL" in function definition in filtertest.c.
352 PH/32 Applied Sieve patches from the maintainer.
354 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
356 PH/33 Added "verify = not_blind".
358 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
359 Local/Makefile (with some defaults set). These are used in built scripts
360 such as exicyclog, but they have never been used in the exim_install
361 script (though there are many overriding facilities there). I have
362 arranged that the exim_install script now takes note of these two
365 PH/35 Installed configuration files for Dragonfly.
367 PH/36 When a locally submitted message by a trusted user did not contain a
368 From: header, and the sender address was obtained from -f or from an SMTP
369 MAIL command, and the trusted user did not use -F to supply a sender
370 name, $originator_name was incorrectly used when constructing a From:
371 header. Furthermore, $originator_name was used for submission mode
372 messages from external hosts without From: headers in a similar way,
373 which is clearly wrong.
375 PH/37 Added control=suppress_local_fixups.
377 PH/38 When log_selector = +received_sender was set, and the addition of the
378 sender made the log line's construction buffer exactly full, or one byte
379 less than full, an overflow happened when the terminating "\n" was
382 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
383 when the result of a list match is failure because a DNS lookup failed.
385 PH/40 RM_COMMAND is now used in the building process.
387 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
388 the "build-* directories that it finds.
390 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
391 address in a domain literal was a prefix of an interface address.
393 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
394 when verifying a sender address, unless rewrite_headers is false.
396 PH/44 Wrote a long comment about why errors_to addresses are verified as
397 recipients, not senders.
399 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
400 the ratelimit ACL was added.
402 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
404 PH/46 Added extra information about PostgreSQL errors to the error string.
406 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
407 avoiding the need to install special zones in a real server. This is
408 backwards compatible; if it can't find the fake resolver, it drops back.
409 Thus, both old and new test suites can be run.
411 TF/02 Added util/ratelimit.pl
413 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
414 clock is set back in time.
416 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
417 Candler <B.Candler@pobox.com>.
419 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
420 OK for addresses that are the result of redirections.
422 PH/48 A number of further additions for the benefit of the new test suite,
423 including a fake gethostbyname() that interfaces to the fake DNS resolver
426 TF/06 The fix for widen_domains has also been applied to qualify_single and
427 search_parents which are the other dnslookup options that can cause
430 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
433 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
435 TF/07 Exim produced the error message "an SRV record indicated no SMTP
436 service" if it encountered an MX record with an empty target hostname.
437 The message is now "an MX or SRV record indicated no SMTP service".
439 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
440 if the DNS of the sending site is misconfigured. This is quite a
441 common situation. This change restores the behaviour of treating a
442 helo verification defer as a failure.
444 PH/51 If self=fail was set on a router, the bounce message did not include the
445 actual error message.
451 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
453 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
454 command itself ended in error, the underlying message about the transport
455 filter timeout was being overwritten with the pipe command error. Now the
456 underlying error message should be appended to the second error message.
458 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
460 PH/02 Reduce the amount of output that "make" produces by default. Full output
461 can still be requested.
463 PH/03 The warning log line about a condition test deferring for a "warn" verb
464 was being output only once per connection, rather than after each
465 occurrence (because it was using the same function as for successful
466 "warn" verbs). This seems wrong, so I have changed it.
468 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
469 it should not have, which might have caused a crash in the right
470 circumstances, but probably never did.
472 PH/04 Installed a modified version of Tony Finch's patch to make submission
473 mode fix the return path as well as the Sender: header line, and to
474 add a /name= option so that you can make the user's friendly name appear
477 TF/03 Added the control = fakedefer ACL modifier.
479 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
480 Mark Lowes for thorough testing.
482 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
484 TK/03 Merged latest SRS patch from Miles Wilton.
486 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
487 with the definition in sysexits.h (which is #included earlier).
488 Fortunately, Exim does not actually use EX_OK. The code used to try to
489 preserve the sysexits.h value, by assumimg that macro definitions were
490 scanned for macro replacements. I have been disabused of this notion,
491 so now the code just undefines EX_OK before #including unistd.h.
493 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
494 in the smtp transport. When a block could not be written in a single
495 write() function, the timeout was being re-applied to each part-write.
496 This seems wrong - if the receiver was accepting one byte at a time it
497 would take for ever. The timeout is now adjusted when this happens. It
498 doesn't have to be particularly precise.
500 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
501 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
503 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
504 without a domain if the check to <postmaster@domain> fails.
506 SC/01 Eximstats: added -xls and the ability to specify output files
507 (patch written by Frank Heydlauf).
509 SC/02 Eximstats: use FileHandles for outputing results.
511 SC/03 Eximstats: allow any combination of xls, txt, and html output.
513 SC/04 Eximstats: fixed display of large numbers with -nvr option
515 SC/05 Eximstats: fixed merging of reports with empty tables.
517 SC/06 Eximstats: added the -include_original_destination flag
519 SC/07 Eximstats: removed tabs and trailing whitespace.
521 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
523 TK/06 MBOX spool code: Add real "From " MBOX separator line
524 so the .eml file is really in mbox format (even though
525 most programs do not really care). Patch from Alex Miller.
527 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
528 The latter is generated from $received_to and is only set if the
529 message has one envelope recipient. SA can use these headers,
530 obviously out-of-the-box. Patch from Alex Miller.
532 PH/08 The ${def test on a variable was returning false if the variable's
533 value was "0", contrary to what the specification has always said!
534 The result should be true unless the variable is empty.
536 PH/09 The syntax error of a character other than { following "${if
537 def:variable_name" (after optional whitespace) was not being diagnosed.
538 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
539 accidental colon was present, for example, could give incorrect results.
541 PH/10 Tidied the code in a number of places where the st_size field of a stat()
542 result is used (not including appendfile, where other changes are about
545 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
546 This involved changing a lot of size variables from int to off_t. It
547 should work with maildirs and everything.
549 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
550 spamd dying while we are connected to it.
552 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
555 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
556 function for BDB 4.3.
558 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
560 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
561 the sources for PCRE have been re-arranged and more files are now
564 PH/15 The code I had for printing potentially long long variables in PH/11
565 above was not the best (it lost precision). The length of off_t variables
566 is now inspected at build time, and an appropriate printing format (%ld
567 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
568 to be "long long int" or "long int". This is needed for the internal
569 formatting function string_vformat().
571 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
572 the configuration file to be ":syslog", then the script "guesses" where
573 the logs files are, rather than using the compiled in default. In our
574 case the guess is not the same as the compiled default, so the script
575 suddenly stopped working when I started to use syslog. The patch checks
576 to see if log_file_path is "". If so, it attempts to read it from exim
577 with no configuration file to get the compiled in version, before it
578 falls back to the previous guessing code."
580 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
581 implementing BATV in an Exim configuration. See NewStuff for the gory
584 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
585 Makefile that are specific to HP-UX.
587 PH/18 If the "use_postmaster" option was set for a recipient callout together
588 with the "random" option, the postmaster address was used as the MAIL
589 FROM address for the random test, but not for the subsequent recipient
590 test. It is now used for both.
592 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
593 patch removes a few documentation additions to RFC 3028, because the
594 latest draft now contains them. It adds the new en;ascii-case comparator
595 and a new error check for 8bit text in MIME parts. Comparator and
596 require names are now matched exactly. I enabled the subaddress
597 extension, but it is not well tested yet (read: it works for me)."
599 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
600 rework some of the code of TK/09 above to avoid the hardwired use of
601 "%lld" and "long long". Replaced the call to snprintf() with a call to
604 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
605 records point to non-existent hosts", "retry timeout exceeded", and
606 "retry time not reached for any host after a long failure period".
608 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
609 experimental DomainKeys support:
611 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
612 (2) On an error such as an illegally used "control", the wrong name for
613 the control was given.
615 These problems did NOT occur unless DomainKeys support was compiled.
617 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
619 PH/24 Added ${if match_ip condition.
621 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
622 databases so that it will be absolutely obvious if a crash occurs in the
623 DB library. This is a regular occurrence (often caused by mis-matched
626 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
627 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
628 picked up on a user's system that detects such things. There doesn't seem
629 to be a gcc warning option for this - only an attribute that has to be
630 put on the function's prototype. It seems that in Fedora Core 4 they have
631 set this on a number of new functions. No doubt there will be more in due
634 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
635 specify a transport. However, if an address that was verified by such a
636 router was the subject of a callout, Exim crashed because it tried to
637 read the rcpt_include_affixes from the non-existent transport. Now it
638 just assumes that the setting of that option is false. This bug was
639 introduced by 4.51/PH/31.
641 PH/28 Changed -d+all to exclude +memory, because that information is very
642 rarely of interest, but it makes the output a lot bigger. People tend to
643 do -d+all out of habit.
645 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
646 code in os-type was giving problems when libc.so lives in lib64, like on
649 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
650 aren't the modern standard, and it seems that some systems' include files
651 don't always have them. Exim was already checking for some of the newer
652 ones like T_AAAA, and defining it itself. I've added checks for all the
653 record types that Exim uses.
655 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
656 not automatically generating a new one, as it is supposed to. This
657 prevented TLS from working. If the file did exist, but contained invalid
658 data, a new version was generated, as expected. It was only the case of a
659 non-existent file that was broken.
661 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
662 with a change in libdomainkeys > 0.64.
664 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
665 from DNS. If the selector record carries the flag, it now has
666 precedence over the domain-wide flag.
668 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
670 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
671 the use of a port name that isn't defined in /etc/services) occurred, the
672 message was deferred as in a normal delivery, and thus remained on the
673 spool, instead of being failed because of the mua_wrapper setting. This
674 is now fixed, and I tidied up some of the mua_wrapper messages at the
677 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
678 the messages in a hash of arrays rather than using individual hashes.
679 This is a bit cleaner and results in dramatic memory savings, albeit
680 at a slight CPU cost.
682 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
683 as requested by Marc Sherman.
685 SC/10 Eximstats: added histograms for user specified patterns as requested
688 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
690 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
691 fopen() in the content-scanning modules that did not already have it.
697 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
698 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
700 TK/02 Fix ACL "control" statement not being available in MIME ACL.
702 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
704 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
705 to test Sieve filters that use "vacation".
707 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
708 that changes the way the GnuTLS parameters are stored in the cache file.
709 The new format can be generated externally. For backward compatibility,
710 if the data in the cache doesn't make sense, Exim assumes it has read an
711 old-format file, and it generates new data and writes a new file. This
712 means that you can't go back to an older release without removing the
715 PH/03 A redirect router that has both "unseen" and "one_time" set does not
716 work if there are any delivery delays because "one_time" forces the
717 parent to be marked "delivered", so its unseen clone is never tried
718 again. For this reason, Exim now forbids the simultaneous setting of
721 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
722 redirected to themselves ("homonym" addresses). Read the long ChangeLog
723 entry if you want to know the details. The fix, however, neglected to
724 consider the case when local delivery batching is involved. The test for
725 "previously delivered" was not happening when checking to see if an
726 address could be batched with a previous (undelivered) one; under
727 certain circumstances this could lead to multiple deliveries to the same
730 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
731 in its include files, and this causes problems building Exim.
733 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
734 header_syntax) but Exim was just ignoring anything given after a slash.
735 In particular, this caused confusion with an attempt to use "verify =
736 reverse_host_lookup/defer_ok". An error is now given when options are
737 supplied for verify items that do not have them. (Maybe reverse_host_
738 lookup should have a defer_ok option, but that's a different point.)
740 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
741 defined by RFC 821) to 2048, because there were problems with some AUTH
742 commands, and RFC 1869 says the size should be increased for extended
743 SMTP commands that take arguments.
745 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
748 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
749 "unknown" error; now it says that the functionality isn't in the binary.
751 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
752 an address' error message when a string expansion fails (syntax or
753 whatever). Otherwise the password may appear in the log. Following change
754 PH/42 below, there is no longer a chance of it appearing in a bounce
757 PH/11 Installed exipick version 20050225.0 from John Jetmore.
759 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
760 of its addresses was ever tried. (Bugzilla bug #2.)
762 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
763 the result incorrectly in the debug output. (It correctly added a newline
764 to what was transported.)
766 TF/01 Added $received_time.
768 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
769 commented out examples of how to interface to a virus scanner and to
770 SpamAssassin. Also added commented examples of av_scanner and
771 spamd_address settings.
773 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
774 and controls are allowed in which ACLs. There were a couple of minor
775 errors. Some of the entries in the conditions table (which is a table of
776 where they are NOT allowed) were getting very unwieldy; rewrote them as a
777 negation of where the condition IS allowed.
779 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
781 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
782 header file does not have a version number, so I've had to invent a new
783 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
784 API. The code is untested by me (my Linux distribution still has 0.3.2 of
785 radiusclient), but it was contributed by a Radius user.
787 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
788 files or directories, for OpenSSL.
790 PH/19 When an Exim process that is running as root has to create an Exim log
791 file, it does so in a subprocess that runs as exim:exim so as to get the
792 ownership right at creation (otherwise, other Exim processes might see
793 the file with the wrong ownership). There was no test for failure of this
794 fork() call, which would lead to the process getting stuck as it waited
795 for a non-existent subprocess. Forks do occasionally fail when resources
796 run out. I reviewed all the other calls to fork(); they all seem to check
799 PH/20 When checking for unexpected SMTP input at connect time (before writing
800 the banner), Exim was not dealing correctly with a non-positive return
801 from the read() function. If the client had disconnected by this time,
802 the result was a log entry for a synchronization error with an empty
803 string after "input=" when read() returned zero. If read() returned -1
804 (an event I could not check), uninitialized data bytes were printed.
805 There were reports of junk text (parts of files, etc) appearing after
808 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
810 PH/22 Added support for macro redefinition, and (re)definition in between
811 driver and ACL definitions.
813 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
814 forgetting to use the resulting value; it was using the unexpanded value.
816 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
817 hadn't been configured. The fix is from Juergen Kreileder, who
818 understands it better than I do:
820 "Here's what I see happening with three configured cyrus_sasl
821 authenticators configured (plain, login, cram-md5):
823 On startup auth_cyrus_sasl_init() gets called for each of these.
824 This means three calls to sasl_listmech() without a specified mech_list.
825 => SASL tests which mechs of all available mechs actually work
826 => three warnings about OTP not working
827 => the returned list contains: plain, login, cram-md5, digest-md5, ...
829 With the patch, sasl_listmech() also gets called three times. But now
830 SASL's mech_list option is set to the server_mech specified in the the
831 authenticator. Or in other words, the answer from sasl_listmech()
832 gets limited to just the mech you're testing for (which is different
834 => the return list contains just 'plain' or 'login', 'cram-md5' or
835 nothing depending on the value of ob->server_mech.
837 I've just tested the patch: Authentication still works fine,
838 unavailable mechs specified in the exim configuration are still
839 caught, and the auth.log warnings about OTP are gone."
841 PH/25 When debugging is enabled, the contents of the command line are added
842 to the debugging output, even when log_selector=+arguments is not
845 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
846 answer is "GNU", and only if the return is "GNU/something" is the answer
849 PH/27 $acl_verify_message is now set immediately after the failure of a
850 verification in an ACL, and so is available in subsequent modifiers. In
851 particular, the message can be preserved by coding like this:
853 warn !verify = sender
854 set acl_m0 = $acl_verify_message
856 Previously, $acl_verify_message was set only while expanding "message"
857 and "log_message" when a very denied access.
859 PH/28 Modified OS/os.c-Linux with
861 -#ifndef OS_LOAD_AVERAGE
862 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
864 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
865 nomenclature these days.)
867 PH/29 Installed patch from the Sieve maintainer that adds the options
868 sieve_useraddress and sieve_subaddress to the redirect router.
870 PH/30 In these circumstances:
871 . Two addresses routed to the same list of hosts;
872 . First host does not offer TLS;
873 . First host accepts first address;
874 . First host gives temporary error to second address;
875 . Second host offers TLS and a TLS session is established;
876 . Second host accepts second address.
877 Exim incorrectly logged both deliveries with the TLS parameters (cipher
878 and peerdn, if requested) that were in fact used only for the second
881 PH/31 When doing a callout as part of verifying an address, Exim was not paying
882 attention to any local part prefix or suffix that was matched by the
883 router that accepted the address. It now behaves in the same way as it
884 does for delivery: the affixes are removed from the local part unless
885 rcpt_include_affixes is set on the transport.
887 PH/32 Add the sender address, as F=<...>, to the log line when logging a
888 timeout during the DATA phase of an incoming message.
890 PH/33 Sieve envelope tests were broken for match types other than :is. I have
891 applied a patch sanctioned by the Sieve maintainer.
893 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
894 the uid or gid is negative. A case of a negative gid caused this to be
895 noticed. The fix allows for either to be negative.
897 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
898 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
901 PH/36 The change PH/12 above was broken. Fixed it.
903 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
904 the grounds that routing the same address twice would always produce the
905 same answer. This might have been true once, but it is certainly no
906 longer true now. Routing a child address may depend on the previous
907 routing that produced that child. Some complicated redirection strategies
908 went wrong when messages had multiple recipients, and made Exim's
909 behaviour dependent on the order in which the addresses were given.
911 I have moved the duplicate checking until after the routing is complete.
912 Exim scans the addresses that are assigned to local and remote
913 transports, and removes any duplicates. This means that more work will be
914 done, as duplicates will always all be routed, but duplicates are
915 presumably rare, so I don't expect this is of any significance.
917 For deliveries to pipes, files, and autoreplies, the duplicate checking
918 still happens during the routing process, since they are not going to be
921 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
922 It corrects a timeout issue with spamd. This is Ian's comment: "The
923 background is that sometimes spamd either never reads data from a
924 connection it has accepted, or it never writes response data. The exiscan
925 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
926 blindly assumes that writes won't block so it may never time out."
928 PH/39 Allow G after quota size as well as K and M.
930 PH/40 The value set for $authenticated_id in an authenticator may not contain
931 binary zeroes or newlines because the value is written to log lines and
932 to spool files. There was no check on this. Now the value is run through
933 the string_printing() function so that such characters are converted to
934 printable escape sequences.
936 PH/41 $message_linecount is a new variable that contains the total number of
937 lines in the message. Compare $body_linecount, which is the count for the
940 PH/42 Exim no longer gives details of delivery errors for specific addresses in
941 bounce and delay warning messages, except in certain special cases, which
944 (a) An SMTP error message from a remote host;
945 (b) A message specified in a :fail: redirection;
946 (c) A message specified in a "fail" command in a system filter;
947 (d) A message specified in a FAIL return from the queryprogram router;
948 (e) A message specified by the cannot_route_message router option.
950 In these cases only, Exim does include the error details in bounce and
951 warning messages. There are also a few cases where bland messages such
952 as "unrouteable address" or "local delivery error" are given.
954 PH/43 $value is now also set for the "else" part of a ${run expansion.
956 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
957 being worked on, but at least Exim now implements the latest version to
960 PH/45 In a pipe transport, although a timeout while waiting for the pipe
961 process to complete was treated as a delivery failure, a timeout while
962 writing the message to the pipe was logged, but erroneously treated as a
963 successful delivery. Such timeouts include transport filter timeouts. For
964 consistency with the overall process timeout, these timeouts are now
965 treated as errors, giving rise to delivery failures by default. However,
966 there is now a new Boolean option for the pipe transport called
967 timeout_defer, which, if set TRUE, converts the failures into defers for
968 both kinds of timeout. A transport filter timeout is now identified in
971 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
972 systems where "make" and "gmake" are different, calling "gmake" at top
973 level broke things. I've arranged for the value of $(MAKE) to be passed
974 from the Makefile to this script so that it can call the same version of
978 A note about Exim versions 4.44 and 4.50
979 ----------------------------------------
981 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
982 changes of various kinds. As a consequence, a big documentation update was
983 needed. This delayed the release for rather longer than seemed good, especially
984 in the light of a couple of (minor) security issues. Therefore, the changes
985 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
986 release. So 4.44 and 4.50 are in effect two different branches that both start
989 I have left the 4.50 change log unchanged; it contains all the changes since
990 4.43. The change log for 4.44 is below; many of its items are identical to
991 those for 4.50. This seems to be the most sensible way to preserve the
992 historical information.
998 1. Minor wording change to the doc/README.SIEVE file.
1000 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1001 computation of the current number of files was incorrect.
1003 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1004 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1007 4. Give more explanation in the error message when the command for a transport
1008 filter fails to execute.
1010 5. There are several places where Exim runs a non-Exim command in a
1011 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1012 was being done only for the command run by the queryprogram router. It is
1013 now done for all such subprocesses. The other cases are: ${run, transport
1014 filters, and the commands run by the lmtp and pipe transports.
1016 6. Added CONFIGURE_GROUP build-time option.
1018 7. Some older OS have a limit of 256 on the maximum number of file
1019 descriptors. Exim was using setrlimit() to set 1000 as a large value
1020 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1021 systems. I've change it so that if it can't get 1000, it tries for 256.
1023 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1024 was an oversight, and furthermore, ever since the addition of extra
1025 controls (e.g. 4.43/32), the checks on when to allow different forms of
1026 "control" were broken. There should now be diagnostics for all cases when a
1027 control that does not make sense is encountered.
1029 9. Added the /retain_sender option to "control=submission".
1031 10. $recipients is now available in the predata ACL (oversight).
1033 11. Tidy the search cache before the fork to do a delivery from a message
1034 received from the command line. Otherwise the child will trigger a lookup
1035 failure and thereby defer the delivery if it tries to use (for example) a
1036 cached ldap connection that the parent has called unbind on.
1038 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1039 of $address_data from the recipient verification was clobbered by the
1040 sender verification.
1042 13. The value of address_data from a sender verification is now available in
1043 $sender_address_data in subsequent conditions in the ACL statement.
1045 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1047 15. Added a new option "connect=<time>" to callout options, to set a different
1050 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1051 was its contents. (It was OK if the option was not defined at all.)
1053 17. A "Completed" log line is now written for messages that are removed from
1054 the spool by the -Mrm option.
1056 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1057 information about exactly what failed.
1059 19. Added -dd to debug only the daemon process.
1061 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1062 handles timeouts, both on the server side and network timeouts. Renamed the
1063 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1065 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1066 It is now set to "smtps".
1068 22. $host_address is now set to the target address during the checking of
1069 ignore_target_hosts.
1071 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1072 being passed; this would have caused $sender_host_name to have been used if
1073 matching the list had actually called for a host name (not very likely,
1074 since this list is usually IP addresses). A host name is now passed as
1077 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1078 code that specifies a non-restarting handler (typically sigaction() in
1079 modern systems) in an attempt to fix a rare and obscure crash bug.
1081 25. Narrowed the window for a race in the daemon that could cause it to ignore
1082 SIGCHLD signals. This is not a major problem, because they are used only to
1083 wake it up if nothing else does.
1085 26. A malformed maildirsize file could cause Exim to calculate negative values
1086 for the mailbox size or file count. Odd effects could occur as a result.
1087 The maildirsize information is now recalculated if the size or filecount
1090 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1091 support for a long time. Removed HAVE_SYS_VFS_H.
1093 28. Installed the latest version of exipick from John Jetmore.
1095 29. In an address list, if the pattern was not a regular expression, an empty
1096 subject address (from a bounce message) matched only if the pattern was an
1097 empty string. Non-empty patterns were not even tested. This was the wrong
1098 because it is perfectly reasonable to use an empty address as part of a
1099 database query. An empty address is now tested by patterns that are
1100 lookups. However, all the other forms of pattern expect the subject to
1101 contain a local part and a domain, and therefore, for them, an empty
1102 address still always fails if the pattern is not itself empty.
1104 30. Exim went into a mad DNS loop when attempting to do a callout where the
1105 host was specified on an smtp transport, and looking it up yielded more
1106 than one IP address.
1108 31. Re-factored the code for checking spool and log partition space into a
1109 function that finds that data and another that does the check. The former
1110 is then used to implement four new variables: $spool_space, $log_space,
1111 $spool_inodes, and $log_inodes.
1113 32. The RFC2047 encoding function was originally intended for short strings
1114 such as real names; it was not keeping to the 75-character limit for
1115 encoded words that the RFC imposes. It now respects the limit, and
1116 generates multiple encoded words if necessary. To be on the safe side, I
1117 have increased the buffer size for the ${rfc2047: expansion operator from
1120 33. It is now permitted to omit both strings after an "if" condition; if the
1121 condition is true, the result is "true". As before, when the second string
1122 is omitted, a false condition yields an empty string. This makes it less
1123 cumbersome to write custom ACL and router conditions.
1125 34. Failure to deliver a bounce message always caused it to be frozen, even if
1126 there was an errors_to setting on the router. The errors_to setting is now
1129 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1130 canonical form (fully expanded) before being placed in
1131 $sender_host_address.
1133 36. The table in the code that translates DNS record types into text (T_A to
1134 "A" for instance) was missing entries for NS and CNAME. It is just possible
1135 that this could have caused confusion if both these types were looked up
1136 for the same domain, because the text type is used as part of Exim's
1137 per-process caching. But the chance of anyone hitting this buglet seems
1140 37. The dnsdb lookup has been extended in a number of ways.
1142 (1) There is a new type, "zns", which walks up the domain tree until it
1143 finds some nameserver records. It should be used with care.
1145 (2) There is a new type, "mxh", which is like "mx" except that it returns
1146 just the host names, not the priorities.
1148 (3) It is now possible to give a list of domains (or IP addresses) to be
1149 looked up. The behaviour when one of the lookups defers can be
1150 controlled by a keyword.
1152 (4) It is now possible to specify the separator character for use when
1153 multiple records are returned.
1155 38. The dnslists ACL condition has been extended: it is now possible to supply
1156 a list of IP addresses and/or domains to be looked up in a particular DNS
1159 39. Added log_selector=+queue_time_overall.
1161 40. When running the queue in the test harness, wait just a tad after forking a
1162 delivery process, to get repeatability of debugging output.
1164 41. Include certificate and key file names in error message when GnuTLS fails
1165 to set them up, because the GnuTLS error message doesn't include the name
1166 of the failing file when there is a problem reading it.
1168 42. Allow both -bf and -bF in the same test run.
1170 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1172 44. The "Exiscan patch" is now merged into the mainline Exim source.
1174 45. Sometimes the final signoff response after QUIT could fail to get
1175 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1176 < 0 before doing a fflush(). This bug looks as though it goes back to the
1177 introduction of TLS in release 3.20, but "sometimes" must have been rare
1178 because the tests only now provoked it.
1180 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1181 (this can affect the format of dates).
1183 47. exim_tidydb, when checking for the continued existence of a message for
1184 which it has found a message-specific retry record, was not finding
1185 messages that were in split spool directories. Consequently, it was
1186 deleting retry records that should have stayed in existence.
1188 48. Steve fixed some bugs in eximstats.
1190 49. The SPA authentication driver was not abandoning authentication and moving
1191 on to the next authenticator when an expansion was forced to fail,
1192 contradicting the general specification for all authenticators. Instead it
1193 was generating a temporary error. It now behaves as specified.
1195 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1196 (the order specifies the preference for clients). The order is now AES256,
1197 AES128, 3DES, ARCFOUR128.
1199 51. Small patch to Sieve code - explicitly set From: when generating an
1202 52. Exim crashed if a remote delivery caused a very long error message to be
1203 recorded - for instance if somebody sent an entire SpamAssassin report back
1204 as a large number of 550 error lines. This bug was coincidentally fixed by
1205 increasing the size of one of Exim's internal buffers (big_buffer) that
1206 happened as part of the Exiscan merge. However, to be on the safe side, I
1207 have made the code more robust (and fixed the comments that describe what
1210 53. Now that there can be additional text after "Completed" in log lines (if
1211 the queue_time_overall log selector is set), a one-byte patch to exigrep
1212 was needed to allow it to recognize "Completed" as not the last thing in
1215 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1216 patch that reportedly fixes this has been added. I am not expert enough to
1217 create a test for it. This is what the patch creator wrote:
1219 "I found a little strange behaviour of ldap code when working with
1220 Windows 2003 AD Domain, where users was placed in more than one
1221 Organization Units. When I tried to give exim partial DN, the exit code
1222 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1223 But simultaneously result of request was absolutely normal ldap result,
1224 so I produce this patch..."
1226 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1227 REFERENCE, so I have modified the code to exclude the patch when that macro
1230 55. Some experimental protocols are using DNS PTR records for new purposes. The
1231 keys for these records are domain names, not reversed IP addresses. The
1232 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1233 leaves it alone. Component reversal etc. now happens only for IP addresses.
1236 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1238 57. Double the size of the debug message buffer (to 2048) so that more of very
1239 long debug lines gets shown.
1241 58. The exicyclog utility now does better if the number of log files to keep
1242 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1244 59. Two changes related to the smtp_active_hostname option:
1246 (1) $smtp_active_hostname is now available as a variable.
1247 (2) The default for smtp_banner uses $smtp_active_hostname instead
1248 of $primary_hostname.
1250 60. The host_aton() function is supposed to be passed a string that is known
1251 to be a valid IP address. However, in the case of IPv6 addresses, it was
1252 not checking this. This is a hostage to fortune. Exim now panics and dies
1253 if the condition is not met. A case was found where this could be provoked
1254 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1255 components; fortuitously, this particular loophole had already been fixed
1256 by change 4.50/55 above.
1258 If there are any other similar loopholes, the new check in host_aton()
1259 itself should stop them being exploited. The report I received stated that
1260 data on the command line could provoke the exploit when Exim was running as
1261 exim, but did not say which command line option was involved. All I could
1262 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1263 running as the user.
1266 61. There was a buffer overflow vulnerability in the SPA authentication code
1267 (which came originally from the Samba project). I have added a test to the
1268 spa_base64_to_bits() function which I hope fixes it.
1271 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1272 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1274 63. The daemon start-up calls getloadavg() while still root for those OS that
1275 need the first call to be done as root, but it missed one case: when
1276 deliver_queue_load_max is set with deliver_drop_privilege. This is
1277 necessary for the benefit of the queue runner, because there is no re-exec
1278 when deliver_drop_privilege is set.
1280 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1281 This has been fixed.
1283 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1284 was in use, was not putting the data itself into the right store pool;
1285 consequently, it could be overwritten for a subsequent message in the same
1286 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1289 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1291 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1292 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1293 the function were treating the return as a boolean value, which happened to
1294 work because 0=false and not-0=true, but is not correct code.
1296 68. The host_aton() function was not handling scoped IPv6 addresses (those
1297 with, for example, "%eth0" on the end) correctly.
1299 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1300 negated items (that is, ~something) in unsigned ints. Some compilers
1301 apparently mutter when there is no cast.
1303 70. If an address verification called from an ACL failed, and did not produce a
1304 user-specific message (i.e. there was only a "system" message), nothing was
1305 put in $acl_verify_message. In this situation, it now puts the system
1308 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1309 session; change 4.31/43 added the unwanted input to the log line - except
1310 that it did not do this in the start of session case. It now does.
1312 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1313 This is wrong and can cause the other end to generate a synchronization
1314 error if it is another Exim or anything else that does the synchronization
1315 check. A QUIT command is no longer sent after a timeout.
1317 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1318 during host lookups.
1320 74. The defer_ok option of callout verification was not working if it was used
1321 when verifying addresses in header lines, that is, for this case:
1323 verify = header_sender/callout=defer_ok
1325 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1326 those file descriptors could be used for SMTP connections. If anything
1327 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1328 could be sent to the SMTP client, causing chaos. The daemon now opens
1329 stdin, stdout, and stderr to /dev/null when it puts itself into the
1332 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1333 log by default. The user can override this with suitable Perl magic.
1335 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1336 the log message when discard triggers, was not working for the DATA ACL or
1337 for the non-SMTP ACL.
1339 78. Error message wording change in sieve.c.
1341 79. If smtp_accept_max_per_host was set, the number of connections could be
1342 restricted to fewer than expected, because the daemon was trying to set up
1343 a new connection before checking whether the processes handling previous
1344 connections had finished. The check for completed processes is now done
1345 earlier. On busy systems, this bug wouldn't be noticed because something
1346 else would have woken the daemon, and it would have reaped the completed
1349 80. If a message was submitted locally by a user whose login name contained one
1350 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1351 It caused a spool format error. I have fixed the spool reading code. A
1352 related problem was that the "from" clause in the Received: line became
1353 illegal because of the space(s). It is now covered by ${quote_local_part.
1355 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1358 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1360 83. Patch from Sieve maintainer to fix unterminated string problem in
1361 "vacation" handling.
1363 84. Some minor changes to the Linux configuration files to help with other
1364 OS variants using glibc.
1366 85. One more patch for Sieve to update vacation handling to latest spec.
1369 ----------------------------------------------------
1370 See the note above about the 4.44 and 4.50 releases.
1371 ----------------------------------------------------
1377 1. Change 4.43/35 introduced a bug that caused file counts to be
1378 incorrectly computed when quota_filecount was set in an appendfile
1381 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1382 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1385 3. Give more explanation in the error message when the command for a transport
1386 filter fails to execute.
1388 4. There are several places where Exim runs a non-Exim command in a
1389 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1390 was being done only for the command run by the queryprogram router. It is
1391 now done for all such subprocesses. The other cases are: ${run, transport
1392 filters, and the commands run by the lmtp and pipe transports.
1394 5. Some older OS have a limit of 256 on the maximum number of file
1395 descriptors. Exim was using setrlimit() to set 1000 as a large value
1396 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1397 systems. I've change it so that if it can't get 1000, it tries for 256.
1399 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1400 was an oversight, and furthermore, ever since the addition of extra
1401 controls (e.g. 4.43/32), the checks on when to allow different forms of
1402 "control" were broken. There should now be diagnostics for all cases when a
1403 control that does not make sense is encountered.
1405 7. $recipients is now available in the predata ACL (oversight).
1407 8. Tidy the search cache before the fork to do a delivery from a message
1408 received from the command line. Otherwise the child will trigger a lookup
1409 failure and thereby defer the delivery if it tries to use (for example) a
1410 cached ldap connection that the parent has called unbind on.
1412 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1413 of $address_data from the recipient verification was clobbered by the
1414 sender verification.
1416 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1417 was its contents. (It was OK if the option was not defined at all.)
1419 11. A "Completed" log line is now written for messages that are removed from
1420 the spool by the -Mrm option.
1422 12. $host_address is now set to the target address during the checking of
1423 ignore_target_hosts.
1425 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1426 being passed; this would have caused $sender_host_name to have been used if
1427 matching the list had actually called for a host name (not very likely,
1428 since this list is usually IP addresses). A host name is now passed as
1431 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1432 code that specifies a non-restarting handler (typically sigaction() in
1433 modern systems) in an attempt to fix a rare and obscure crash bug.
1435 15. Narrowed the window for a race in the daemon that could cause it to ignore
1436 SIGCHLD signals. This is not a major problem, because they are used only to
1437 wake it up if nothing else does.
1439 16. A malformed maildirsize file could cause Exim to calculate negative values
1440 for the mailbox size or file count. Odd effects could occur as a result.
1441 The maildirsize information is now recalculated if the size or filecount
1444 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1445 support for a long time. Removed HAVE_SYS_VFS_H.
1447 18. Updated exipick to current release from John Jetmore.
1449 19. Allow an empty sender to be matched against a lookup in an address list.
1450 Previously the only cases considered were a regular expression, or an
1453 20. Exim went into a mad DNS lookup loop when doing a callout where the
1454 host was specified on the transport, if the DNS lookup yielded more than
1457 21. The RFC2047 encoding function was originally intended for short strings
1458 such as real names; it was not keeping to the 75-character limit for
1459 encoded words that the RFC imposes. It now respects the limit, and
1460 generates multiple encoded words if necessary. To be on the safe side, I
1461 have increased the buffer size for the ${rfc2047: expansion operator from
1464 22. Failure to deliver a bounce message always caused it to be frozen, even if
1465 there was an errors_to setting on the router. The errors_to setting is now
1468 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1469 canonical form (fully expanded) before being placed in
1470 $sender_host_address.
1472 24. Updated eximstats to version 1.33
1474 25. Include certificate and key file names in error message when GnuTLS fails
1475 to set them up, because the GnuTLS error message doesn't include the name
1476 of the failing file when there is a problem reading it.
1478 26. Expand error message when OpenSSL has problems setting up cert/key files.
1481 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1482 (this can affect the format of dates).
1484 28. exim_tidydb, when checking for the continued existence of a message for
1485 which it has found a message-specific retry record, was not finding
1486 messages that were in split spool directories. Consequently, it was
1487 deleting retry records that should have stayed in existence.
1489 29. eximstats updated to version 1.35
1490 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1491 1.35 - bugfix such that pie charts by volume are generated correctly
1493 30. The SPA authentication driver was not abandoning authentication and moving
1494 on to the next authenticator when an expansion was forced to fail,
1495 contradicting the general specification for all authenticators. Instead it
1496 was generating a temporary error. It now behaves as specified.
1498 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1499 (the order specifies the preference for clients). The order is now AES256,
1500 AES128, 3DES, ARCFOUR128.
1502 31. Small patch to Sieve code - explicitly set From: when generating an
1505 32. Exim crashed if a remote delivery caused a very long error message to be
1506 recorded - for instance if somebody sent an entire SpamAssassin report back
1507 as a large number of 550 error lines. This bug was coincidentally fixed by
1508 increasing the size of one of Exim's internal buffers (big_buffer) that
1509 happened as part of the Exiscan merge. However, to be on the safe side, I
1510 have made the code more robust (and fixed the comments that describe what
1513 33. Some experimental protocols are using DNS PTR records for new purposes. The
1514 keys for these records are domain names, not reversed IP addresses. The
1515 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1516 leaves it alone. Component reversal etc. now happens only for IP addresses.
1519 34. The host_aton() function is supposed to be passed a string that is known
1520 to be a valid IP address. However, in the case of IPv6 addresses, it was
1521 not checking this. This is a hostage to fortune. Exim now panics and dies
1522 if the condition is not met. A case was found where this could be provoked
1523 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1524 components; fortuitously, this particular loophole had already been fixed
1525 by change 4.50/55 or 4.44/33 above.
1527 If there are any other similar loopholes, the new check in host_aton()
1528 itself should stop them being exploited. The report I received stated that
1529 data on the command line could provoke the exploit when Exim was running as
1530 exim, but did not say which command line option was involved. All I could
1531 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1532 running as the user.
1535 35. There was a buffer overflow vulnerability in the SPA authentication code
1536 (which came originally from the Samba project). I have added a test to the
1537 spa_base64_to_bits() function which I hope fixes it.
1540 36. The daemon start-up calls getloadavg() while still root for those OS that
1541 need the first call to be done as root, but it missed one case: when
1542 deliver_queue_load_max is set with deliver_drop_privilege. This is
1543 necessary for the benefit of the queue runner, because there is no re-exec
1544 when deliver_drop_privilege is set.
1546 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1547 was in use, was not putting the data itself into the right store pool;
1548 consequently, it could be overwritten for a subsequent message in the same
1549 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1552 38. Sometimes the final signoff response after QUIT could fail to get
1553 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1554 < 0 before doing a fflush(). This bug looks as though it goes back to the
1555 introduction of TLS in release 3.20, but "sometimes" must have been rare
1556 because the tests only now provoked it.
1562 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1563 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1564 Now it returns an integer. A number of calls were still expecting a T/F
1565 return. Fortuitously, in all cases, the tests worked in OK situations,
1566 which is the norm. However, things would have gone wrong on any write
1567 failures on the smtp file descriptor. This function is used when sending
1568 messages over SMTP and also when doing verify callouts.
1570 2. When Exim is called to do synchronous delivery of a locally submitted
1571 message (the -odf or -odi options), it no longer closes stderr before doing
1574 3. Implemented the mua_wrapper option.
1576 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1578 5. Implemented the functions header_remove(), header_testname(),
1579 header_add_at_position(), and receive_remove_recipient(), and exported them
1582 6. If an ACL "warn" statement specified the addition of headers, Exim already
1583 inserted X-ACL-Warn: at the start if there was no header name. However, it
1584 was not making this test for the second and subsequent header lines if
1585 there were newlines in the string. This meant that an invalid header could
1586 be inserted if Exim was badly configured.
1588 7. Allow an ACL "warn" statement to add header lines at the start or after all
1589 the Received: headers, as well as at the end.
1591 8. Added the rcpt_4xx retry error code.
1593 9. Added postmaster_mailfrom=xxx to callout verification option.
1595 10. Added mailfrom=xxxx to the callout verification option, for verify=
1598 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1599 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1601 12. Inserted some casts to stop certain compilers warning when using pointer
1602 differences as field lengths or precisions in printf-type calls (mostly
1603 affecting debugging statements).
1605 13. Added optional readline() support for -be (dynamically loaded).
1607 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1608 same clock tick as a message's arrival, so that its received time was the
1609 same as the "first fail" time on the retry record, and that message
1610 remained on the queue past the ultimate address timeout, every queue runner
1611 would try a delivery (because it was past the ultimate address timeout) but
1612 after another failure, the ultimate address timeout, which should have then
1613 bounced the address, did not kick in. This was a "< instead of <=" error;
1614 in most cases the first failure would have been in the next clock tick
1615 after the received time, and all would be well.
1617 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1618 being recognized when the domain list was tested by the match_domain
1619 condition in an expansion string.
1621 16. Added the ${str2b64: operator.
1623 17. Exim was always calling setrlimit() to set a large limit for the number of
1624 processes, without checking whether the existing limit was already
1625 adequate. (It did check for the limit on file descriptors.) Furthermore,
1626 errors from getrlimit() and setrlimit() were being ignored. Now they are
1627 logged to the main and panic logs, but Exim does carry on, to try to do its
1628 job under whatever limits there are.
1630 18. Imported PCRE 5.0.
1632 19. Trivial typo in log message " temporarily refused connection" (the leading
1635 20. If the log selector return_path_on_delivery was set and an address was
1636 redirected to /dev/null, the delivery process crashed because it assumed
1637 that a return path would always be set for a "successful" delivery. In this
1638 case, the whole delivery is bypassed as an optimization, and therefore no
1641 21. Internal re-arrangement: the function for sending a challenge and reading
1642 a response while authentication was assuming a zero-terminated challenge
1643 string. It's now changed to take a pointer and a length, to allow for
1644 binary data in such strings.
1646 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1648 23. Exim was not respecting finduser_retries when seeking the login of the
1649 uid under which it was called; it was always trying 10 times. (The default
1650 setting of finduser_retries is zero.) Also, it was sleeping after the final
1651 failure, which is pointless.
1653 24. Implemented tls_on_connect_ports.
1655 25. Implemented acl_smtp_predata.
1657 26. If the domain in control=submission is set empty, Exim assumes that the
1658 authenticated id is a complete email address when it generates From: or
1659 Sender: header lines.
1661 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1662 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1663 chown and chgrp in /bin and hostname in /usr/bin.
1665 28. Exim was keeping the "process log" file open after each use, just as it
1666 does for the main log. This opens the possibility of it remaining open for
1667 long periods when the USR1 signal hits a daemon. Occasional processlog
1668 errors were reported, that could have been caused by this. Anyway, it seems
1669 much more sensible not to leave this file open at all, so that is what now
1672 29. The long-running daemon process does not normally write to the log once it
1673 has entered its main loop, and it closes the log before doing so. This is
1674 so that log files can straightforwardly be renamed and moved. However,
1675 there are a couple of unusual error situations where the daemon does write
1676 log entries, and I had neglected to close the log afterwards.
1678 30. The text of an SMTP error response that was received during a remote
1679 delivery was being truncated at 512 bytes. This is too short for some of
1680 the long messages that one sometimes sees. I've increased the limit to
1683 31. It is now possible to make retry rules that apply only when a message has a
1684 specific sender, in particular, an empty sender.
1686 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1687 it possible to be selective about when SMTP synchronization is enforced.
1689 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1691 32. Implemented hosts_connection_nolog.
1693 33. Added an ACL for QUIT.
1695 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1698 35. Added mailbox_size and mailbox_filecount to appendfile.
1700 36. Added control = no_multiline_responses to ACLs.
1702 37. There was a bug in the logic of the code that waits for the clock to tick
1703 in the case where the clock went backwards by a substantial amount such
1704 that the microsecond fraction of "now" was more than the microsecond
1705 fraction of "then" (but the whole seconds number was less).
1707 38. Added support for the libradius Radius client library this is found on
1708 FreeBSD (previously only the radiusclient library was supported).
1714 1. When certain lookups returned multiple values in the form name=value, the
1715 quoting of the values was not always being done properly. Specifically:
1716 (a) If the value started with a double quote, but contained no whitespace,
1718 (b) If the value contained whitespace other than a space character (i.e.
1719 tabs or newlines or carriage returns) it was not quoted.
1720 This fix has been applied to the mysql and pgsql lookups by writing a
1721 separate quoting function and calling it from the lookup code. The fix
1722 should probably also be applied to nisplus, ibase and oracle lookups, but
1723 since I cannot test any of those, I have not disturbed their existing code.
1725 2. A hit in the callout cache for a specific address caused a log line with no
1726 reason for rejecting RCPT. Now it says "Previous (cached) callout
1727 verification failure".
1729 3. There was an off-by-one bug in the queryprogram router. An over-long
1730 return line was truncated at 256 instead of 255 characters, thereby
1731 overflowing its buffer with the terminating zero. As well as fixing this, I
1732 have increased the buffer size to 1024 (and made a note to document this).
1734 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1735 when Exim is waiting for an SMTP response from a remote server, Exim
1736 restarts its select() call on the socket, thereby resetting its timeout.
1737 This is not a problem when such interrupts are rare. Somebody set up a cron
1738 job to run exiwhat every 2 minutes, which is less than the normal select()
1739 timeout (5 or 10 minutes). This meant that the select() timeout never
1740 kicked in because it was always reset. I have fixed this by comparing the
1741 time when an interrupt arrives with the time at the start of the first call
1742 to select(). If more time than the timeout has elapsed, the interrupt is
1743 treated as a timeout.
1745 5. Some internal re-factoring in preparation for the addition of Sieve
1746 extensions (by MH). In particular, the "personal" test is moved to a
1747 separate function, and given an option for scanning Cc: and Bcc: (which is
1748 not set for Exim filters).
1750 6. When Exim created an email address using the login of the caller as the
1751 local part (e.g. when creating a From: or Sender: header line), it was not
1752 quoting the local part when it contained special characters such as @.
1754 7. Installed new OpenBSD configuration files.
1756 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1757 try to make them clearer.
1759 9. Callout options, other than the timeout value, were being ignored when
1760 verifying sender addresses in header lines. For example, when using
1762 verify = header_sender/callout=no_cache
1764 the cache was (incorrectly) being used.
1766 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1767 only the Cygwin environment.
1769 11. When return_path_on_delivery was set as a log selector, if different remote
1770 addresses in the same message used different return paths and parallel
1771 remote delivery occurred, the wrong values would sometimes be logged.
1772 (Whenever a remote delivery process finished, the return path value from
1773 the most recently started remote delivery process was logged.)
1775 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1776 lines when AUTH and/or TLS are in use. This is the "received protocol"
1777 field. Exim used to use "asmtp" for authenticated SMTP, without any
1778 indication (in the protocol name) for TLS use. Now it follows the RFC and
1779 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1780 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1781 names appear in log lines as well as in Received: header lines.
1783 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1784 extensions, and comparison tests, and to fix some bugs.
1786 14. Changes to the "personal" filter test:
1788 (1) The test was buggy in that it was just doing the equivalent of
1789 "contains" tests on header lines. For example, if a user's address was
1790 anne@some.where, the "personal" test would incorrectly be true for
1792 To: susanne@some.where
1794 This test is now done by extracting each address from the header in turn,
1795 and checking the entire address. Other tests that are part of "personal"
1796 are now done using regular expressions (for example, to check local parts
1797 of addresses in From: header lines).
1799 (2) The list of non-personal local parts in From: addresses has been
1800 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1801 taken from the Sieve specification recommendations.
1803 (3) If the message contains any header line starting with "List-" it is
1804 treated as non-personal.
1806 (4) The test for "circular" in the Subject: header line has been removed
1807 because it now seems ill-conceived.
1809 15. Minor typos in src/EDITME comments corrected.
1811 16. Installed latest exipick from John Jetmore.
1813 17. If headers_add on a router specified a text string that was too long for
1814 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1815 of string_sprintf() is now avoided.
1817 18. $message_body_size was not set (it was always zero) when running the DATA
1818 ACL and the local_scan() function.
1820 19. For the "mail" command in an Exim filter, no default was being set for
1821 the once_repeat time, causing a random time value to be used if "once" was
1822 specified. (If the value happened to be <= 0, no repeat happened.) The
1823 default is now 0s, meaning "never repeat". The "vacation" command was OK
1824 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1825 (I found it when inspecting the code).
1827 20. There is now an overall timeout for performing a callout verification. It
1828 defaults to 4 times the callout timeout, which applies to individual SMTP
1829 commands during the callout. The overall timeout applies when there is more
1830 than one host that can be tried. The timeout is checked before trying the
1831 next host. This prevents very long delays if there are a large number of
1832 hosts and all are timing out (e.g. when the network connections are timing
1833 out). The value of the overall timeout can be changed by specifying an
1834 additional sub-option for "callout", called "maxwait". For example:
1836 verify = sender/callout=5s,maxwait=20s
1838 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1839 to the end before writing, but this should make it even safer).
1841 22. Exim was forgetting that it had advertised PIPELINING for the second and
1842 subsequent messages on an SMTP connection. It was also not resetting its
1843 memory on STARTTLS and an internal HELO.
1845 23. When Exim logs an SMTP synchronization error within a session, it now
1846 records whether PIPELINING has been advertised or not.
1848 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1849 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1850 rather than long int.
1852 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1854 26. Added the never_mail option to autoreply.
1860 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1861 crash if the getsockname() call failed; this can happen if a connection is
1862 closed very soon after it is established. The problem was simply in the
1863 order in which certain operations were done, causing Exim to try to write
1864 to the SMTP stream before it had set up the file descriptor. The bug has
1865 been fixed by making things happen in the correct order.
1871 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1872 before the connection was closed, thus losing the rejection response.
1874 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1875 some early Solaris releases, but causes trouble in current releases where
1876 socklen_t is defined.
1878 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1881 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1884 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1885 that releasing the top of it at the end releases what was used for sub-
1886 expansions (unless the block got too big). However, discard this block if
1887 the first thing is a variable or header, so that we can use its block when
1888 it is dynamic (useful for very large $message_headers, for example).
1890 6. Lookups now cache *every* query, not just the most recent. A new, separate
1891 store pool is used for this. It can be recovered when all lookup caches are
1892 flushed. Lookups now release memory at the end of their result strings.
1893 This has involved some general refactoring of the lookup sources.
1895 7. Some code has been added to the store_xxx() functions to reduce the amount
1896 of flapping under certain conditions.
1898 8. log_incoming_interface used to affect only the <= reception log lines. Now
1899 it causes the local interface and port to be added to several more SMTP log
1900 lines, for example "SMTP connection from", and rejection lines.
1902 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1904 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1906 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1907 could be overwritten at the end of the current message (or the start of a
1908 new message if it was set in a HELO ACL). The value is now preserved for
1909 the duration of the SMTP connection.
1911 12. If a transport had a headers_rewrite setting, and a matching header line
1912 contained an unqualified address, that address was qualified, even if it
1913 did not match any rewriting rules. The underlying bug was that the values
1914 of the flags that permit the existence of unqualified sender and recipient
1915 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1916 non-local messages, and by -bnq for local messages) were not being
1917 preserved with the message after it was received.
1919 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1920 "next input=" as part of the text comprising the host identity instead of
1921 the correct text. The code was using the same buffer for two different
1922 strings. However, depending on which order the printing function evaluated
1923 its arguments, the bug did not always show up. Under Linux, for example, my
1924 test suite worked just fine.
1926 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1927 doesn't work with some older versions of Perl. It has been changed to "my",
1928 which in any case is probably the better facility to use.
1930 15. A really picky compiler found some instances of statements for creating
1931 error messages that either had too many or two few arguments for the format
1934 16. The size of the buffer for calls to the DNS resolver has been increased
1935 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1936 for addresses that have a lot of PTR records. This alleviates a problem; it
1937 does not fully solve it.
1939 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1940 buffer now truncates the list and logs the incident, which is the same
1941 action as happens when Exim is looking up a host name and its aliases.
1942 Previously in this situation something unpredictable would happen;
1943 sometimes it was "internal error: store_reset failed".
1945 18. If a server dropped the connection unexpectedly when an Exim client was
1946 using GnuTLS and trying to read a response, the client delivery process
1947 crashed while trying to generate an error log message.
1949 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1950 string, for example:
1952 warn message = H1: something\nH2: something
1954 the text was added as a single header line from Exim's point of view
1955 though it ended up OK in the delivered message. However, searching for the
1956 second and subsequent header lines using $h_h2: did not work. This has been
1957 fixed. Similarly, if a system filter added multiple headers in this way,
1958 the routers could not see them.
1960 20. Expanded the error message when iplsearch is called with an invalid key to
1961 suggest using net-iplsearch in a host list.
1963 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1964 ACLs are no longer actually imposed (and a message to that effect is
1967 22. If a "gecos" field in a passwd entry contained escaped characters, in
1968 particular, if it contained a \" sequence, Exim got it wrong when building
1969 a From: or a Sender: header from that name. A second bug also caused
1970 incorrect handling when an unquoted " was present following a character
1971 that needed quoting.
1973 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1974 was not being matched caselessly.
1976 24. Arranged for all hyphens in the exim.8 source to be escaped with
1979 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1980 properly. Recipient callout cache records were still being keyed to include
1981 the sender, even when use_sender was set false. This led to far more
1982 callouts that were necessary. The sender is no longer included in the key
1983 when use_sender is false.
1985 26. Added "control = submission" modifier to ACLs.
1987 27. Added the ${base62d: operator to decode base 62 numbers.
1989 28. dnsdb lookups can now access SRV records.
1991 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1992 the configuration file.
1994 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1995 (-v) mode. This makes the output for a verbose queue run more intelligible.
1997 31. Added a use_postmaster feature to recipient callouts.
1999 32. Added the $body_zerocount variable, containing the number of binary zero
2000 bytes in the message body.
2002 33. The time of last modification of the "new" subdirectory is now used as the
2003 "mailbox time last read" when there is a quota error for a maildir
2006 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2008 35. Added +ignore_unknown as a special item in host lists.
2010 36. Code for decoding IPv6 addresses in host lists is now included, even if
2011 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2012 address was recognized as an IP address, but was then not correctly decoded
2013 into binary, causing unexpected and incorrect effects when compared with
2020 1. Very minor rewording of debugging text in manualroute to say "list of
2021 hosts" instead of "hostlist".
2023 2. If verify=header_syntax was set, and a header line with an unqualified
2024 address (no domain) and a large number of spaces between the end of the
2025 name and the colon was received, the reception process suffered a buffer
2026 overflow, and (when I tested it) crashed. This was caused by some obsolete
2027 code that should have been removed. The fix is to remove it!
2029 3. When running in the test harness, delay a bit after writing a bounce
2030 message to get a bit more predictability in the log output.
2032 4. Added a call to search_tidyup() just before forking a reception process. In
2033 theory, someone could use a lookup in the expansion of smtp_accept_max_
2034 per_host which, without the tidyup, could leave open a database connection.
2036 5. Added the variables $recipient_data and $sender_data which get set from a
2037 lookup success in an ACL "recipients" or "senders" condition, or a router
2038 "senders" option, similar to $domain_data and $local_part_data.
2040 6. Moved the writing of debug_print from before to after the "senders" test
2043 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2044 problems for message scanning, either using a data ACL, or using
2045 local_scan() because the Received: header was not generated till after they
2046 were called (in order to set the time as the time of reception completion).
2047 I have revised the way this works. The header is now generated after the
2048 body is received, but before the ACL or local_scan() are called. After they
2049 are run, the timestamp in the header is updated.
2055 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2056 before starting a queue runner without re-exec. This happened only when
2057 deliver_drop_privilege was set or when the Exim user was set to root. The
2058 effect of the bug was that timeouts during subsequent deliveries caused
2059 crashes instead of being properly handled. The handler is now left at its
2060 default (and expected) setting.
2062 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2063 message, again when deliver_drop_privilege is set or Exim is run as root.
2064 The bug described in (1) was not present in this case, but the tidying up
2065 of the other signals was missing. I have made the two cases consistent.
2067 3. The ignore_target_hosts setting on a manualroute router was being ignored
2068 for hosts that were looked up using the /MX notation.
2070 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2073 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2074 operated on the sender address. After changing the $sender_address to <>
2075 for the sender address verify, Exim was re-instated it as the original
2076 (before rewriting) address, but remembering that it had rewritten it, so it
2077 wasn't rewriting it again. This bug also had the effect of breaking the
2078 sender address verification caching when the sender address was rewritten.
2080 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2081 This has been changed so that if the ip literal address matches
2082 ignore_target_hosts, the router declines.
2084 7. Added expansion conditions match_domain, match_address, and match_local_
2085 part (NOT match_host).
2087 8. The placeholder for the Received: header didn't have a length field set.
2089 9. Added code to Exim itself and to exim_lock to test for a specific race
2090 condition that could lead to file corruption when using MBX delivery. The
2091 issue is with the lockfile that is created in /tmp. If this file is removed
2092 after a process has opened it but before that process has acquired a lock,
2093 there is the potential for a second process to recreate the file and also
2094 acquire a lock. This could lead to two Exim processes writing to the file
2095 at the same time. The added code performs the same test as UW imapd; it
2096 checks after acquiring the lock that its file descriptor still refers to
2097 the same named file.
2099 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2100 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2103 11. Added the smtp_active_hostname option. If used, this will typically be made
2104 to depend on the incoming interface address. Because $interface_address is
2105 not set up until the daemon has forked a reception process, error responses
2106 that can happen earlier (such as "too many connections") no longer contain
2109 12. If an expansion in a condition on a "warn" statement fails because a lookup
2110 defers, the "warn" statement is abandoned, and the next ACL statement is
2111 processed. Previously this caused the whole ACL to be aborted.
2113 13. Added the iplsearch lookup type.
2115 14. Added ident_timeout as a log selector.
2117 15. Added tls_certificate_verified as a log selector.
2119 16. Added a global option tls_require_ciphers (compare the smtp transport
2120 option of the same name). This controls incoming TLS connections.
2122 17. I finally figured out how to make tls_require_ciphers do a similar thing
2123 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2124 before starting the TLS session.
2126 18. Tabs are now shown as \t in -bP output.
2128 19. If the log selector return_path_on_delivery was set, Exim crashed when
2129 bouncing a message because it had too many Received: header lines.
2131 20. If two routers both had headers_remove settings, and the first one included
2132 a superfluous trailing colon, the final name in the first list and the
2133 first name in the second list were incorrectly joined into one item (with a
2134 colon in the middle).
2140 1. Added -C and -D options to the exinext utility, mainly to make it easier
2141 to include in the automated testing, but these could be helpful when
2142 multiple configurations are in use.
2144 2. The exinext utility was not formatting the output nicely when there was
2145 an alternate port involved in the retry record key, nor when there was a
2146 message id as well (for retries that were specific to a specific message
2147 and a specific host). It was also confused by IPv6 addresses, because of
2148 the additional colons they contain. I have fixed the IPv4 problem, and
2149 patched it up to do a reasonable job for IPv6.
2151 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2152 delivery, the log line now contains "pipelined" if PIPELINING was used.
2154 4. An SMTP transport process used to panic and die if the bind() call to set
2155 an explicit outgoing interface failed. This has been changed; it is now
2156 treated in the same way as a connect() failure.
2158 5. A reference to $sender_host_name in the part of a conditional expansion
2159 that was being skipped was still causing a DNS lookup. This no longer
2162 6. The def: expansion condition was not recognizing references to header lines
2163 that used bh_ and bheader_.
2165 7. Added the _cache feature to named lists.
2167 8. The code for checking quota_filecount in the appendfile transport was
2168 allowing one more file than it should have been.
2170 9. For compatibility with Sendmail, the command line option
2178 and sets the incoming protocol and host name (for trusted callers). The
2179 host name and its colon can be omitted when only the protocol is to be set.
2180 Note the Exim already has two private options, -pd and -ps, that refer to
2181 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2182 "s", but I don't think that's a major issue.
2184 10. A number of refactoring changes to the code, none of which should affect
2187 (a) The number of logging options was getting close to filling up the
2188 32-bit word that was used as a bit map. I have split them into two classes:
2189 those that are passed in the argument to log_write(), and those that are
2190 only ever tested independently outside of that function. These are now in
2191 separate 32-bit words, so there is plenty of room for expansion again.
2192 There is no change in the user interface or the logging behaviour.
2194 (b) When building, for example, log lines, the code previously used a
2195 macro that called string_cat() twice, in order to add two strings. This is
2196 not really sufficiently general. Furthermore, there was one instance where
2197 it was actually wrong because one of the argument was used twice, and in
2198 one call a function was used. (As it happened, calling the function twice
2199 did not affect the overall behaviour.) The macro has been replaced by a
2200 function that can join an arbitrary number of extra strings onto a growing
2203 (c) The code for expansion conditions now uses a table and a binary chop
2204 instead of a serial search (which was left over from when there were very
2205 few conditions). Also, it now recognizes conditions like "pam" even when
2206 the relevant support is not compiled in: a suitably worded error message is
2207 given if an attempt is made to use such a condition.
2209 11. Added ${time_interval:xxxxx}.
2211 12. A bug was causing one of the ddress fields not to be passed back correctly
2212 from remote delivery subprocesses. The field in question was not being
2213 subsequently used, so this caused to problems in practice.
2215 13. Added new log selectors queue_time and deliver_time.
2217 14. Might have fixed a bug in maildirsizefile handling that threw up
2218 "unexpected character" debug warnings, and recalculated the data
2219 unnecessarily. In any case, I expanded the warning message to give more
2222 15. Added the message "Restricted characters in address" to the statements in
2223 the default ACL that block characters like @ and % in local parts.
2225 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2226 Three changes have been made:
2228 (a) There was a serious bug; a negative response to MAIL caused the whole
2229 recipient domain to be cached as invalid, thereby blocking all messages
2230 to all local parts at the same domain, from all senders. This bug has
2231 been fixed. The domain is no longer cached after a negative response to
2232 MAIL if the sender used is not empty.
2234 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2237 (c) A new callout option, "use_sender" has been added for people who want
2238 the modified behaviour.
2244 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2247 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2248 indeed breaks things for older releases.
2250 3. Added additional logging to the case where there is a problem reading data
2251 from a filter that is running in a subprocess using a pipe, in order to
2252 try to track down a specific problem.
2254 4. Testing facility fudge: when running in the test harness and attempting
2255 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2256 getting "No route to host". Convert this to a timeout.
2258 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2261 6. Some OS don't have socklen_t but use size_t instead. This affects the
2262 fifth argument of getsockopt() amongst other things. This is now
2263 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2264 can be set for individual OS. I have set it for SunOS5, OSF1, and
2265 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2266 some earlier ones do not.
2268 7. Change 4.30/15 was not doing the test caselessly.
2270 8. The standard form for an IPv6 address literal was being rejected by address
2271 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2272 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2273 this, as well as the form without the "IPv6" on the front (but only when
2274 address literals are enabled, of course).
2276 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2278 10. Exim crashed if a message with an empty sender address specified by -f
2279 encountered a router with an errors_to setting. This could be provoked only
2280 by a command such as
2284 where an empty string was supplied; "<>" did not hit this bug.
2286 11. Installed PCRE release 4.5.
2288 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2289 remained set. It is now erased.
2291 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2292 times from message ids (which are base 36 rather than the normal 62).
2294 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2295 were being counted as actual protocol errors, and logged if the log
2296 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2297 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2298 and DATA following a set of rejected RCPTs do not count as protocol errors.
2299 In other words, Exim assumes they were pipelined, though this may not
2300 actually be the case. Of course, in all cases the client gets an
2301 appropriate error code.
2303 15. If a lookup fails in an ACL condition, a message about the failure may
2304 be available; it is used if testing the ACL cannot continue, because most
2305 such messages specify what the cause of the deferral is. However, some
2306 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2307 that caused an old message to be retained and used if a later statement
2308 caused a defer, replacing the real cause of the deferral.
2310 16. If an IP address had so many PTR records that the DNS lookup buffer
2311 was not large enough to hold them, Exim could crash while trying to process
2312 the truncated data. It now detects and logs this case.
2314 17. Further to 4.21/58, another change has been made: if (and only if) the
2315 first line of a message (the first header line) ends with CRLF, a bare LF
2316 in a subsequent header line has a space inserted after it, so as not to
2317 terminate the header.
2319 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2320 unnecessarily, used atoi() instead of strtol(), and didn't check the
2321 termination when getting file sizes from file names by regex.
2323 19. Completely re-implemented the support for maildirsize files, in the light
2324 of a number of problems with the previous contributed implementation
2325 (4.30/29). In particular:
2327 . If the quota is zero, the maildirsize file is maintained, but no quota is
2330 . If the maildir directory does not exist, it is created before any attempt
2331 to write a maildirsize file.
2333 . The quota value in the file is just a cache; if the quota is changed in
2334 the transport, the new value overrides.
2336 . A regular expression is available for excluding directories from the
2339 20. The autoreply transport checks the characters in options that define the
2340 message's headers; it allows continued headers, but it was checking with
2341 isspace() after an embedded newline instead of explicitly looking for a
2344 21. If all the "regular" hosts to which an address was routed had passed their
2345 expiry times, and had not reached their retry times, the address was
2346 bounced, even if fallback hosts were defined. Now Exim should go on to try
2349 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2350 equivalent code in the SMTP transport. Some hosts send humungous responses
2351 to HELO/EHLO, more than 1024 it seems.
2353 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2354 gives compiler warnings in some environments. I've now done it "properly",
2357 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2358 (because of problems with the built-in one) was declared to return uschar *
2359 instead of char *, causing compiler failure.
2361 25. Fixed a file descriptor leak when processing alias/forward files.
2363 26. Fixed a minor format string issue in dbfn.c.
2365 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2367 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2368 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2371 29. When a sender address is verified, it is cached, to save repeating the test
2372 when there is more than one recipient in a message. However, when the
2373 verification involves a callout, it is possible for different callout
2374 options to be set for different recipients. It is too complicated to keep
2375 track of this in the cache, so now Exim always runs a verification when a
2376 callout is required, relying on the callout cache for the optimization.
2377 The overhead is duplication of the address routing, but this should not be
2380 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2381 to be verified with callout=postmaster, and the main callout worked but the
2382 postmaster check failed, the verification correctly failed. However, if a
2383 subsequent RCPT command asked for sender verification *without* the
2384 postmaster check, incorrect caching caused this verification also to fail,
2387 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2388 it was not caching the DNS options (qualify_single, search_parents) that
2389 were used when the lookup failed. A subsequent lookup with different
2390 options therefore always gave the same answer, though there were cases
2391 where it should not have. (Example: a "domains = !$mx_any" option on a
2392 dnslookup router: the "domains" option is always processed without any
2393 widening, but the router might have qualify_single set.) Now Exim uses the
2394 cached value only when the same options are set.
2396 32. Added John Jetmore's "exipick" utility to the distribution.
2398 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2399 than a timeout (e.g. a certificate is required, and is not provided), an
2400 Exim server now closes the connection immediately. Previously it waited for
2401 the client to close - but if the client is SSL, it seems that they each
2402 wait for each other, leading to a delay before one of them times out.
2404 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2405 maintained 0.8.x compatibility because I don't think many are using it, and
2406 it is clearly obsolete.
2408 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2411 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2412 client certificate was expired. A simple patch fixes this, though I don't
2413 understand the full logic of why the verify callback is called multiple
2416 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2417 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2418 which causes problems with some clients (such as the Certicom SSL Plus
2419 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2420 disables the coutermeasure allowing Eudora to connect."
2422 38. Exim was not checking that a write() to a log file succeeded. This could
2423 lead to Bad Things if a log got too big, in particular if it hit a file
2424 size limit. Exim now panics and dies if it cannot write to a log file, just
2425 as it does if it cannot open a log file.
2427 39. Modified OS/Makefile-Linux so that it now contains
2429 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2431 The two -D definitions ensure that Exim is compiled with large file
2432 support, which makes it possible to handle log files that are bigger than
2435 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2436 instance) a domain was checked against a named list that involved a lookup,
2437 causing $domain_data to be set, then another domain was checked against the
2438 same list, then the first domain was re-checked, the value of $domain_data
2439 after the final check could be wrong. In particular, if the second check
2440 failed, it could be set empty. This bug probably also applied to
2443 41. The strip_trailing_dot option was not being applied to the address given
2444 with the -f command-line option.
2446 42. The code for reading a message's header from the spool was incrementing
2447 $received_count, but never initializing it. This meant that the value was
2448 incorrect (doubled) while delivering a message in the same process in which
2449 it was received. In the most common configuration of Exim, this never
2450 happens - a fresh exec is done - but it can happen when
2451 deliver_drop_privilege is set.
2453 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2454 it now includes up to 150 characters of the unexpected data in the log
2457 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2458 and building data strings. The size of both of these buffers was 10 000
2459 bytes - far larger than anybody would *ever* want, thought I. Needless to
2460 say, somebody hit the limit. I have increased the maximum line length to
2461 20 000 and the maximum data length of concatenated lines to 100 000. I have
2462 also fixed two bugs, because there was no checking on these buffers. Tsk,
2463 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2464 buffer is too small.
2466 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2467 lsearch lookups. Now it does.
2469 46. When parsing a route_list item in a manualroute router, a fixed-length
2470 buffer was used for the list of hosts. I made this 1024 bytes long,
2471 thinking that nobody would ever have a list of hosts that long. Wrong.
2472 Somebody had a whole pile of complicated expansion conditions, and the
2473 string was silently truncated, leading to an expansion error. It turns out
2474 that it is easier to change to an unlimited length (owing to other changes
2475 that have happened since this code was originally written) than to build
2476 structure for giving a limitation error. The length of the item that
2477 expands into the list of hosts is now unlimited.
2479 47. The lsearch lookup could not handle data where the length of text line was
2480 more than 4095 characters. Such lines were truncated, leading to shortened
2481 data being returned. It should now handle lines of any length.
2483 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2484 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2487 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2488 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2489 no longer happens in comment lines. A list of replacements is now placed
2490 at the head of all of the source files, except those whose only change is
2491 to replace PERL_COMMAND in the very first #! line.
2493 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2494 messages on the queue, with a bottom-up merge sort, using code contributed
2495 by Michael Haardt. This should make operations like -bp somewhat faster on
2496 large queues. It won't affect queue runners, except when queue_run_in_order
2499 51. Installed eximstats 1.31 in the distribution.
2501 52. Added support for SRV lookups to the dnslookup router.
2503 53. If an ACL referred to $message_body or $message_body_end, the value was not
2504 reset for any messages that followed in the same SMTP session.
2506 54. The store-handling optimization for building very long strings was not
2507 differentiating between the different store pools. I don't think this
2508 actually made any difference in practice, but I've tidied it.
2510 55. While running the routers to verify a sender address, $sender_address
2511 was still set to the sender address. This is wrong, because when routing to
2512 send a bounce to the sender, it would be empty. Therefore, I have changed
2513 it so that, while verifying a sender address, $sender_address is set to <>.
2514 (There is no change to what happens when verifying a recipient address.)
2516 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2517 target A or AAAA records (if not already returned) without resetting the
2518 qualify_single or search_parents options of the DNS resolver. These are
2519 inappropriate in this case because the targets of MX and SRV records must
2520 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2521 target that, when qualified, matched something in the local domain. These
2522 two options are now turned off when doing these lookups.
2524 57. It seems that at least some releases of Reiserfs (which does not have the
2525 concept of a fixed number of inodes) returns zero and not -1 for the
2526 number of available inodes. This interacted badly with check_spool_inodes,
2527 which assumed that -1 was the "no such thing" setting. What I have done is
2528 to check that the total number of inodes is greater than zero before doing
2529 the test of how many are available.
2531 58. When a "warn" ACL statement has a log_message modifier, the message is
2532 remembered, and not repeated. This is to avoid a lot of repetition when a
2533 message has many recipients that cause the same warning to be written.
2534 Howewer, Exim was preserving the list of already written lines for an
2535 entire SMTP session, which doesn't seem right. The memory is now reset if a
2536 new message is started.
2538 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2539 debugging output unless log_rewrite was also set.
2541 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2542 of (int)(handle) when we know that handle contains (void *)(-1).
2544 61. The Exim daemon panic-logs an error return when it closes the incoming
2545 connection. However "connection reset by peer" seems to be common, and
2546 isn't really an error worthy of noting specially, so that particular error
2549 62. When Exim is trying to find all the local interfaces, it used to panic and
2550 die if the ioctl to get the interface flags failed. However, it seems that
2551 on at least one OS (Solaris 9) it is possible to have an interface that is
2552 included in the list of interfaces, but for which you get a failure error
2553 for this call. This happens when the interface is not "plumbed" into a
2554 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2555 failure of the "get flags" call assumes that the interface is down.
2557 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2558 makes life easier for people who are doing arithmetic on fields extracted
2559 from dates, where you often get leading zeros that should not be
2560 interpreted as octal.
2562 64. Added qualify_domain to the redirect router, to override the global
2565 65. If a pathologically long header line contained very many addresses (the
2566 report of this problem mentioned 10 000) and each of them was rewritten,
2567 Exim could use up a very large amount of memory. (It kept on making new
2568 copies of the header line as it rewrote, and never released the old ones.)
2569 At the expense of a bit more processing, the header rewriting function has
2570 been changed so that it no longer eats memory in this way.
2572 66. The generation of the Received: header has been moved from the time that a
2573 message starts to be received, to the time that it finishes. The timestamp
2574 in the Received: header should now be very close to that of the <= log
2575 line. There are two side-effects of this change:
2577 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2578 logged header lines no longer include the local Received: line, because
2579 it has not yet been created. The same applies to a copy of the message
2580 that is returned to a non-SMTP sender when a message is rejected.
2582 (b) When a filter file is tested using -bf, no additional Received: header
2583 is added to the test message. After some thought, I decided that this
2586 This change does not affect the value of $received_for. It is still set
2587 after address rewriting, but before local_scan() is called.
2589 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2591 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2592 gave an unhelpful panic error message, and a defer error. I have managed to
2593 change this behaviour so that it now rejects any supplied certificate,
2594 which seems right, as the list of acceptable certificates is empty.
2596 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2597 gave an unhelpful defer error. I have not managed to make this reject any
2598 supplied certificates, but the error message it gives is "no certificate
2599 supplied", which is not helpful.
2601 70. exigrep's output now also includes lines that are not associated with any
2602 message, but which match the given pattern. Implemented by a patch from
2603 Martin Sluka, which also tidied up the Perl a bit.
2605 71. Recipient callout verification, like sender verification, was using <> in
2606 the MAIL FROM command. This isn't really the right thing, since the actual
2607 sender may affect whether the remote host accepts the recipient or not. I
2608 have changed it to use the actual sender in the callout; this means that
2609 the cache record is now keyed on a recipient/sender pair, not just the
2610 recipient address. There doesn't seem to be a real danger of callout loops,
2611 since a callout by the remote host to check the sender would use <>.
2612 [SEE ABOVE: changed after hitting problems.]
2614 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2615 temporary errors. However, in the case of such a code being given after
2616 the end of a data transmission (i.e. after ".") Exim was failing to write
2617 a retry record for the message. (Yes, there was some broken host that was
2618 actually sending 8xx at this point.)
2620 73. An unknown lookup type in a host list could cause Exim to panic-die when
2621 the list was checked. (An example that provoked this was putting <; in the
2622 middle of a list instead of at the start.) If this happened during a DATA
2623 ACL check, a -D file could be left lying around. This kind of configuration
2624 error no longer causes Exim to die; instead it causes a defer errror. The
2625 incident is still logged to the main and panic logs.
2627 74. Buglet left over from Exim 3 conversion. The message "too many messages
2628 in one connection" was written to the rejectlog but not the mainlog, except
2629 when address rewriting (yes!) was being logged.
2631 75. Added write_rejectlog option.
2633 76. When a system filter was run not as root (that is, when system_filter_user
2634 was set), the values of the $n variables were not being returned to the
2635 main process; thus, they were not subsequently available in the $sn
2638 77. Added +return_path_on_delivery log selector.
2640 78. A connection timeout was being treated differently from recipients deferred
2641 when testing hosts_max_try with a message that was older than the host's
2642 retry timeout. (The host should not be counted, thus allowing all hosts to
2643 be tried at least once before bouncing.) This may have been the cause of an
2644 occasionally reported bug whereby a message would remain on the queue
2645 longer than the retry timeout, but would be bounced if a delivery was
2646 forced. I say "may" because I never totally pinned down the problem;
2647 setting up timeout/retry tests is difficult. See also the next item.
2649 79. The ultimate address timeout was not being applied to errors that involved
2650 a combination of host plus message (for example, a timeout on a MAIL
2651 command). When an address resolved to a number of possible hosts, and they
2652 were not all tried for each delivery (e.g. because of hosts_max_try), a
2653 message could remain on the queue longer than the retry timeout.
2655 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2658 81. Fixed an obscure SMTP outgoing bug which required at least the following
2659 conditions: (a) there was another message waiting for the same server;
2660 (b) the server returned 5xx to all RCPT commands in the first message so
2661 that the message was not completed; (c) the server dropped the connection
2662 or gave a negative response to the RSET that Exim sends to abort the
2663 transaction. The observed case was a dropped connection after DATA that had
2664 been sent in pipelining mode. That is, the server had advertised PIPELINING
2665 but was not implementing it correctly. The effect of the bug was incorrect
2666 behaviour, such as trying another host, and this could lead to a crash.
2672 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2673 and daemon.c were passed as pointers to ints; they should have been
2674 pointers to socklen_t variables (which are typically unsigned ints).
2676 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2679 3. Fixed a really odd bug that affected only the testing scheme; patching a
2680 certain fixed string in the binary changed the value of another string that
2681 happened to be identical to the end of the original first string.
2683 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2684 name", it returns that address as the IP address. On some operating
2685 systems (e.g. Solaris), it also passes back the IP address string as the
2686 "host name". However, on others (e.g. Linux), it passes back an empty
2687 string. Exim wasn't checking for this, and was changing the host name to an
2688 empty string, assuming it had been canonicized.
2690 5. Although rare, it is permitted to have more than one PTR record for a given
2691 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2692 all the names associated with an address, because they do in Solaris.
2693 However, it seems that they do not in Linux for data that comes from the
2694 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2695 I found this out when I moved to a new Linux workstation and tried to run
2696 the Exim test suite.
2698 To get round this problem I have changed the code so that it now does its
2699 own call to the DNS to look up PTR records when searching for a host name.
2700 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2701 addresses that are only in /etc/hosts are still found.
2703 This behaviour is, however, controlled by an option called host_lookup_
2704 order, which defaults to "bydns:byaddr". If people want to use the other
2705 order, or indeed, just use one or the other means of lookup, they can
2706 specify it in this variable.
2708 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2709 some operating systems, this comes back from gethostbyaddr() as an empty
2710 string, and this is what Exim used to test for. However, it seems that in
2711 other systems, "." is yielded. Exim now tests for this case too.
2713 7. The values of check_spool_space and check_log_space are now held internally
2714 as a number of kilobytes instead of an absolute number of bytes. If a
2715 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2716 kilobyte. This means that much larger values can be stored.
2718 8. Exim monitor: an attempt to get the action menu when not actually pointing
2719 at a message produces an empty menu entitled "No message selected". This
2720 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2721 no entries in it ("Shell widget menu has zero width and/or height"). So I
2722 have added a single, blank menu entry in this case.
2724 9. Added ${quote_local_part.
2726 10. MIME decoding is now applied to the contents of Subject: header lines when
2729 11. Now that a reference to $sender_host_address automatically causes a reverse
2730 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2731 host lookup before query-style lookups in lists that might use this
2732 variable. This has therefore been abolished, and the "net-" prefix is no
2733 longer necessary for query-style lookups.
2735 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2736 have been a typo for LFLAGS, so it has been changed.
2738 13. The install script calls Exim with "-C /dev/null" in order to find the
2739 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2740 to be output. Howeve, since Exim outputs its version number before the
2741 error, it didn't break the script. It just looked ugly. I fixed this by
2742 always allowing "-C /dev/null" if the caller is root.
2744 14. Ignore overlarge ACL variable number when reading spool file - insurance
2745 against a later release with more variables having written the file.
2747 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2748 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2749 this, as well as the form without the "IPv6" on the front.
2751 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2752 OS/Makefile-Darwin file.
2754 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2755 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2757 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2758 variable. However, some OS use ints for inodes. I've added cast to long int
2759 to get rid of the compiler warning.
2761 19. I had forgotten to lock out "/../" in configuration file names when
2762 ALT_CONFIG_PREFIX was set.
2764 20. Routers used for verification do not need to specify transports. However,
2765 if such a router generated a host list, and callout was configured, Exim
2766 crashed, because it could not find a port number from the (non-existent)
2767 transport. It now assumes port 25 in this circumstance.
2769 21. Added the -t option to exigrep.
2771 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2772 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2773 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2774 them is set, LOOKUP_LSEARCH is forced.
2776 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2778 24. Added sender and host information to the "rejected by local_scan()" log
2779 line; previously there was no indication of these.
2781 25. Added .include_if_exists.
2783 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2784 Linux. It turns out that not all file systems support this. Apparently some
2785 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2786 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2787 not supported on the file descriptor, is now ignored when Exim is trying to
2788 sync a directory. This applies only to Linux.
2790 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2792 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2793 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2796 29. Added support for maildirsize files from supplied patch (modified a bit).
2798 30. The use of :fail: followed by an empty string could lead Exim to respond to
2799 sender verification failures with (e.g.):
2801 550 Verification failed for <xxx>
2802 550 Sender verify failed
2804 where the first response line was missing the '-' that indicates it is not
2805 the final line of the response.
2807 31. The loop for finding the name of the user that called Exim had a hardwired
2808 limit of 10; it now uses the value of finduser_retries, which is used for
2809 all other user lookups.
2811 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2814 33. Exim was neglecting to zero errno before one call of strtol() when
2815 expanding a string and expecting an integer value. On some systems this
2816 resulted in spurious "integer overflow" errors. Also, it was casting the
2817 result into an int without checking.
2819 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2820 did not work. The code looks as if it has *never* worked, though it appears
2821 to have been documented since at least releast 1.62. I have made it work.
2823 35. The "timeout_DNS" error in retry rules, also documented since at least
2824 1.62, also never worked. As it isn't clear exactly what this means, and
2825 clearly it isn't a major issue, I have abolished the feature by treating it
2826 as "timeout", and writing a warning to the main and panic logs.
2828 36. The display of retry rules for -brt wasn't always showing the error code
2831 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2832 timeout_connect_A, timeout_connect_MX.
2834 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2835 to the empty sender.
2837 39. The daemon was not analysing the content of -oX till after it had closed
2838 stderr and disconnected from the controlling terminal. This meant that any
2839 syntax errors were only noted on the panic log, and the return code from
2840 the command was 0. By re-arranging the code a little, I've made the
2841 decoding happen first, so such errors now appear on stderr, and the return
2842 code is 1. However, the actual setting up of the sockets still happens in
2843 the disconnected process, so errors there are still only recorded on the
2846 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2847 connections (as happens on some IP stacks) was logged at start up time as
2848 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2849 it from "IPv6 and IPv4", which means that two separate sockets are being
2852 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2853 says whether AF_INET or AF_INET6 was passed as an argument.
2855 42. Exiwhat output was messed up when time zones were included in log
2858 43. Exiwhat now gives more information about the daemon's listening ports,
2859 and whether -tls-on-connect was used.
2861 44. The "port" option of the smtp transport is now expanded.
2863 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2864 silently ignored. Now an error message is written to the main and panic
2867 46. There's a new ACL modifier called "logwrite" which writes to a log file
2868 as soon as it is encountered.
2870 47. Added $local_user_uid and $local_user_gid at routing time.
2872 48. Exim crashed when trying to verify a sender address that was being
2875 49. Exim was recognizing only a space character after ".include". It now also
2876 recognizes a tab character.
2878 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2879 extracting the relevant information from the specification. The man page no
2880 longer contains scrambled data for the -d option, and I've added a section
2881 at the front about calling Exim under different names.
2883 51. Added "extra_headers" argument to the "mail" command in filter files.
2885 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2888 53. Installed eximstats 1.29.
2890 54. Added transport_filter_timeout as a generic transport option.
2892 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2893 Cc: header lines. This was required by RFC 822, but it not required by RFC
2896 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2897 incoming messages that did not have them. Now it does so only if the
2898 message originates locally, that is, if there is no associated remote host
2899 address. When Resent- header lines are present, this applies to the Resent-
2900 lines rather than the non-Resent- lines.
2902 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2903 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2905 58. Messages for configuration errors now include the name of the main
2906 configuration file - useful now that there may be more than one file in a
2907 list (.included file names were always shown).
2909 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2910 for those rare installations that do not start the daemon as root or run it
2911 setuid root. I've cut out the call to initgroups() if the daemon is not
2914 60. The Exim user and group can now be bound into the binary as text strings
2915 that are looked up at the start of Exim's processing.
2917 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2919 62. Added $mailstore_basename variable.
2921 63. Installed patch to sieve.c from Michael Haardt.
2923 64. When Exim failed to open the panic log after failing to open the main log,
2924 the original message it was trying to log was written to stderr and debug
2925 output, but if they were not available (the usual case in production), it
2926 was lost. Now it is written to syslog before the two lines that record the
2927 failures to open the logs.
2929 65. Users' Exim filters run in subprocesses under the user's uid. It is
2930 possible for a "deliver" command or an alias in a "personal" command to
2931 provoke an address rewrite. If logging of address rewriting is configured,
2932 this fails because the process is not running as root or exim. There may be
2933 a better way of dealing with this, but for the moment (because 4.30 needs
2934 to be released), I have disabled address rewrite logging when running a
2935 filter in a non-root, non-exim process.
2941 1. The buildconfig auxiliary program wasn't quoting the value set for
2942 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2943 not defined. This bug was masked in 4.22 by the effect that was fixed in
2946 2. Some messages that were rejected after a message id was allocated were
2947 shown as "incomplete" by exigrep. It no longer does this for messages that
2948 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2950 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2951 have allow_domain_literals set, the ID did not get logged in the <= line.
2952 Domain literals are now always recognized in Message-ID: header lines.
2954 4. The first argument for a ${extract expansion item is the key name or field
2955 number. Leading and trailing spaces in this item were not being ignored,
2956 causing some misleading effects.
2958 5. When deliver_drop_privilege was set, single queue runner processes started
2959 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2960 same command in the process it spins off) were not dropping privilege.
2962 6. When the daemon running as "exim" started a queue runner, it always
2963 re-executed Exim in the spun-off process. This is a waste of effort when
2964 deliver_drop_privilege is set. The new process now just calls the
2965 queue-runner function directly.
2971 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2974 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2975 ignored. Though the use of -oP was forcing the writing of a pid file, it
2976 was always written to the default place.
2978 3. If the message "no IP address found for host xxxx" is generated during
2979 incoming verification, it is now followed by identification of the incoming
2980 connection (so you can more easily find what provoked it).
2982 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2984 5. Added some features to "harden" Exim a bit more against certain attacks:
2986 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2987 be put in Local/Makefile. This is like the never_users runtime option,
2988 but it cannot be overridden. The default setting is "root".
2990 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2991 prefix string with which any file named in a -C command line option
2994 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2995 is retained for -C and -D only if the caller of Exim is root. Without
2996 it, the exim user may also use -C and -D and retain privilege.
2998 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2999 command line option is disabled.
3001 6. Macro names set by the -D option must start with an upper case letter, just
3002 like macro names defined in the configuration file.
3004 7. Added "dereference=" facility to LDAP.
3006 8. Two instances of the typo "uknown" in the source files are fixed.
3008 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3009 the Configure-Makefile script screwed up while processing it.
3011 10. Incorporated PCRE 4.4.
3013 11. The SMTP synchronization check was not operating right at the start of an
3014 SMTP session. For example, it could not catch a HELO sent before the client
3015 waited for the greeting. There is now a check for outstanding input at the
3016 point when the greeting is written. Because of the duplex, asynchronous
3017 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3018 way, but not yet received, when the check is performed.
3020 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3021 on TCP/IP sockets, because this apparently causes some broken clients to
3024 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3025 unchanged) from the Cygwin maintainer.
3027 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3028 was supported instead of testing for mbx. Effectively a typo.
3030 15. The spa authenticator server code was not checking that the input it
3031 received was valid base64.
3033 16. The debug output line for the "set" modifier in ACLs was not showing the
3034 name of the variable that was being set.
3036 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3038 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3039 lookup on its own. Something else was needed to trigger the lookup. For
3040 example, a match in host_lookup or the need for a host name in a host list.
3041 Now, if $sender_host_name is referenced and the host name has not yet been
3042 looked up, a lookup is performed. If the lookup fails, the variable remains
3043 empty, and $host_lookup_failed is set to "1".
3045 19. Added "eqi" as a case-independent comparison operator.
3047 20. The saslauthd authentication condition could segfault if neither service
3048 nor realm was specified.
3050 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3051 error message that was logged was misleading, and incoming SMTP
3052 connections were dropped. The message is now more accurate, and temporary
3053 errors are given to SMTP connections.
3055 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3056 (except RSET) with a 421 error, until QUIT is received. However, it was
3057 failing to send a response to QUIT.
3059 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3060 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3061 ACL is now run after the helo_try_verify_hosts code.
3063 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3064 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3065 case-independent, so other case variants are also recognized). Apparently
3066 some systems use these upper case variants.
3068 25. If more than two messages were waiting for the same host, and a transport
3069 filter was specified for the transport, Exim sent two messages over the
3070 same TCP/IP connection, and then failed with "socket operation on non-
3071 socket" when it tried to send the third.
3073 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3075 27. The extern definition of crypt16() in expand.c was not being excluded when
3076 the OS had its own crypt16() function.
3078 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3079 as a preferred synonym for return_size_limit, both as an option and as an
3082 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3084 30. Changed the default configuration ACL to relax the local part checking rule
3085 for addresses that are not in any local domains. For these addresses,
3086 slashes and pipe symbols are allowed within local parts, but the sequence
3087 /../ is explicitly forbidden.
3089 31. SPA server authentication was not clearing the challenge buffer before
3092 32. log_message in a "warn" ACL statement was writing to the reject log as
3093 well as to the main log, which contradicts the documentation and doesn't
3094 seem right (because no rejection is happening). So I have stopped it.
3096 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3097 However, I am unable to do any testing of this.
3099 34. Fixed an infelicity in the appendfile transport. When checking directories
3100 for a mailbox, to see if any needed to be created, it was accidentally
3101 using path names with one or more superfluous leading slashes; tracing
3102 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3104 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3105 contents are added to the log line that is written for every discarded
3106 recipient. (Previously a log_message setting was ignored.)
3108 36. The ${quote: operator now quotes the string if it is empty.
3110 37. The install script runs exim in order to find its version number. If for
3111 some reason other than non-existence or emptiness, which it checks, it
3112 could not run './exim', it was installing it with an empty version number,
3113 i.e. as "exim-". This error state is now caught, and the installation is
3116 38. An argument was missing from the function that creates an error message
3117 when Exim fails to connect to the socket for saslauthd authentication.
3118 This could cause Exim to crash, or give a corrupted message.
3120 39. Added isip, isip4, and isip6 to ${if conditions.
3122 40. The ACL variables $acl_xx are now saved with the message, and can be
3123 accessed later in routers, transports, and filters.
3125 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3126 strings in the file are not string-expanded.
3128 42. If a MAIL command specified a SIZE value that was too large to fit into an
3129 int variable, the check against message_size_limit failed. Such values are
3130 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3131 day this will have to be increased, but I don't think I want to be around
3132 when emails are that large.
3139 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3140 iconv() is not standard in FreeBSD.
3142 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3143 IPv6 enabled. The observed symptom was a segmentation fault on return from
3144 the function os_common_find_running_interfaces() in src/os.c.
3146 3. In the check_special_case() function in daemon.c I had used "errno" as an
3147 argument name, which causes warnings on some systems. This was basically a
3148 typo, since it was named "eno" in the comments!
3150 4. The code that waits for the clock to tick (at a resolution of some fraction
3151 of a second) so as to ensure message-id uniqueness was always waiting for
3152 at least one whole tick, when it could have waited for less. [This is
3153 almost certainly not relevant at current processor speeds, where it is
3154 unlikely to ever wait at all. But we try to future-proof.]
3156 5. The function that sleeps for a time interval that includes fractions of a
3157 second contained a race. It did not block SIGALRM between setting the
3158 timer, and suspending (a couple of lines later). If the interval was short
3159 and the sigsuspend() was delayed until after it had expired, the suspension
3160 never ended. On busy systems this could lead to processes getting stuck for
3163 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3164 process, before it forks any delivery processes. The open lookup caching
3165 mechanism meant that the open file or database connection was passed into
3166 the delivery process. The problem was that delivery processes always tidy
3167 up cached lookup data. This could cause a problem for the next delivery
3168 process started by the queue runner, because the external queue runner
3169 process does not know about the closure. So the next delivery process
3170 still has data in the lookup cache. In the case of a file lookup, there was
3171 no problem because closing a file descriptor in a subprocess doesn't affect
3172 the parent. However, if the lookup was caching a connection to a database,
3173 the connection was closed, and the second delivery process was likely to
3174 see errors such as "PGSQL: query failed: server closed the connection
3175 unexpectedly". The problem has been fixed by closing all cached lookups
3176 in a queue runner before running a delivery process.
3178 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3179 seem to have the "const" qualifier which it has on other OS. I've
3182 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3183 *of the same type* (client or server) with the same public name that an
3184 error should be diagnosed.
3186 9. When Exim looked up a host name for an IP address, but failed to find the
3187 original IP address when looking up the host name (a safety check), it
3188 output the message "<ip address> does not match any IP for NULL", which was
3189 confusing, to say the least. The bug was that the host name should have
3190 appeared instead of "NULL".
3192 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3193 user that is built into the binary, and the -C or -D options is used, root
3194 privilege is dropped before the configuration file is read. In addition,
3195 logging is switched to stderr instead of the normal log files. If the
3196 configuration then re-defines the Exim user, the unprivileged environment
3197 is probably not what is expected, so Exim logs a panic warning message (but
3200 However, if deliver_drop_privilege is set, the unprivileged state may well
3201 be exactly what is intended, so the warning has been cut out in that case,
3202 and Exim is allowed to try to write to its normal log files.
3208 1. smtp_return_error_details was not giving details for temporary sender
3209 or receiver verification errors.
3211 2. Diagnose a configuration error if two authenticators have the same public
3214 3. Exim used not to create the message log file for a message until the first
3215 delivery attempt. This could be confusing when incoming messages were held
3216 for policy or load reasons. The message log file is now created at the time
3217 the message is received, and an initial "Received" line is written to it.
3219 4. The automatically generated man page for command line options had a minor
3220 bug that caused no ill effects; however, a more serious problem was that
3221 the procedure for building the man page automatically didn't always
3222 operate. Consequently, release 4.20 contains an out-of-date version. This
3223 shouldn't happen again.
3225 5. When building Exim with embedded Perl support, the script that builds the
3226 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3227 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3229 6. The freeze_tell option was not being used for messages that were frozen on
3230 arrival, either by an ACL or by local_scan().
3232 7. Added the smtp_incomplete_transaction log selector.
3234 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3235 was accepting AUTH without a new EHLO.
3237 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3238 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3241 10. Logging of TCP/IP connections (when configured) now happens in the main
3242 daemon process instead of the child process, so that the TCP/IP connection
3243 count is more accurate (but it can never be perfect).
3245 11. The use of "drop" in a nested ACL was not being handled correctly in the
3246 outer ACL. Now, if condition failure induced by the nested "drop" causes
3247 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3248 or "require"), the connection is dropped.
3250 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3251 that yield "discard" can now be used with an "accept" or a "discard" verb,
3252 but an error is generated for any others (because I can't see a useful way
3253 to define what should happen).
3255 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3256 are now processed in the same way as lines in the Exim configuration file.
3257 In particular, continuation lines are supported.
3259 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3261 15. Added -ti meaning -t -i.
3263 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3264 domains, and warn by logging if others are found.
3266 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3267 returned from GIFCONF when Exim is trying to find the list of interfaces on
3268 a host. The code in os.c has been modified to copy each ifreq to an aligned
3269 structure in all cases.
3271 Also, in some cases, the returned ifreq's were being copied to a 'struct
3272 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3273 means the last couple of bytes of an IPv6 address could be chopped if the
3274 ifreq contained only a normal sockaddr (14 bytes storage).
3276 18. Named domain lists were not supported in the hosts_treat_as_local option.
3277 An entry such as +xxxx was not recognized, and was treated as a literal
3280 19. Ensure that header lines added by a DATA ACL are included in the reject log
3281 if the ACL subsequently rejects the message.
3283 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3284 MD5 (which is deprecated).
3286 21. When testing a filter file using -bf, Exim was writing a message when it
3287 took the sender from a "From " line in the message, but it was not doing so
3288 when it took $return_path from a Return-Path: header line. It now does.
3290 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3291 with a valid header line field name (a series of printing characters
3292 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3294 23. Changed "disc" in the source to "disk" to conform to the documentation and
3295 the book and for uniformity.
3297 24. Ignore Sendmail's -Ooption=value command line item.
3299 25. When execve() failed while trying to run a command in a pipe transport,
3300 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3301 could be confused with a return value of 69 from the command itself. This
3302 has been changed to 127, the value the shell returns if it is asked to run
3303 a non-existent command. The wording for the related log line suggests a
3304 non-existent command as the problem.
3306 26. If received_header_text expands to an empty string, do not add a Received:
3307 header line to the message. (Well, it adds a token one on the spool, but
3308 marks it "old" so that it doesn't get used or transmitted.)
3310 27. Installed eximstats 1.28 (addition of -nt option).
3312 28. There was no check for failure on the call to getsockname() in the daemon
3313 code. This can fail if there is a shortage of resources on the system, with
3314 ENOMEM, for example. A temporary error is now given on failure.
3316 29. Contrary to the C standard, it seems that in some environments, the
3317 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3318 program. Exim now does this explicitly; it affects the formatting of
3319 timestamps using strftime().
3321 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3322 complaints. I've now initialized all the variables, to avoid this.
3324 32. Header lines added by a system filter were not being "seen" during
3325 transport-time rewrites.
3327 33. The info_callback() function passed to OpenSSL is set up with type void
3328 (*)(SSL *, int, int), as described somewhere. However, when calling the
3329 function (actually a macro) that sets it up, the type void(*)() is
3330 expected. I've put in a cast to prevent warnings from picky compilers.
3332 34. If a DNS black list lookup found a CNAME record, but there were no A
3333 records associated with the domain it pointed at, Exim crashed.
3335 35. If a DNS black list lookup returned more than one A record, Exim ignored
3336 all but the first. It now scans all returned addresses if a particular IP
3337 value is being sought. In this situation, the contents of the
3338 $dnslist_value variable are a list of all the addresses, separated by a
3341 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3342 to accept a host name and all its aliases if the forward lookup for any of
3343 them yielded the IP address of the incoming connection. Now it accepts only
3344 those names whose forward lookup yields the correct IP address. Any other
3345 names are discarded. This closes a loophole whereby a rogue DNS
3346 administrator could create reverse DNS records to break through a
3347 wildcarded host restriction in an ACL.
3349 37. If a user filter or a system filter that ran in a subprocess used any of
3350 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3351 the wrong values were passed to the pipe command ($thisaddress had the
3352 value of $0, $0 had the value of $1, etc). This bug was introduced by
3353 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3355 38. Improved the line breaking for long SMTP error messages from ACLs.
3356 Previously, if there was no break point between 40 and 75 characters, Exim
3357 left the rest of the message alone. Two changes have been made: (a) I've
3358 reduced the minimum length to 35 characters; (b) if it can't find a break
3359 point between 35 and 75 characters, it looks ahead and uses the first one
3360 that it finds. This may give the occasional overlong line, but at least the
3361 remaining text gets split now.
3363 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3364 file descriptors might be low, and that setting 1000 would always raise it.
3365 It turns out that in some environments, the limit is already over 1000 and
3366 that lowering it causes trouble. So now Exim takes care not to decrease it.
3368 40. When delivering a message, the value of $return_path is set to $sender_
3369 address at the start of routing (routers may change the value). By an
3370 oversight, this default was not being set up when an address was tested by
3371 -bt or -bv, which affected the outcome if any router or filter referred to
3374 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3375 log only when "message" or "log_message" are set. However, if one of the
3376 conditions was an address verification, or a call to a nested ACL, the
3377 messages generated by the underlying test were being passed through. This
3378 no longer happens. The underlying message is available in $acl_verify_
3379 message for both "message" and "log_message" expansions, so it can be
3380 passed through if needed.
3382 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3383 new expansion $bh_ to give the encoded byte string without charset
3384 translation. Translation happens only if iconv() is available; HAVE_ICONV
3385 indicates this at build time. HEADERS_CHARSET gives the charset to
3386 translate to; headers_charset can change it in the configuration, and
3387 "headers charset" can change it in an individual filter file.
3389 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3390 that creates RFC 2047 encoded "words" labels them as that charset instead
3391 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3392 expansion operator; (ii) when Exim creates a From: line for a local
3393 message; (iii) when a header line is rewritten to include a "phrase" part.
3395 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3396 buggy, causing it to skip the first lines of messages whose message ID
3397 ended in 'D'. This would not have bitten before Exim release 4.14, because
3398 message IDs were unlikely to end in 'D' before then. The effect was to have
3399 incorrect size information for certain domains.
3401 45. #include "config.h" was missing at the start of the crypt16.c module. This
3402 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3405 46. If there was a timeout during a "random" callout check, Exim treated it as
3406 a failure of the random address, and carried on sending RSET and the real
3407 address. If the delay was just some slowness somewhere, the response to the
3408 original RCPT would be taken as a response to RSET and so on, causing
3409 mayhem of various kinds.
3411 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3412 when I implemented it. It didn't allow for the fact that some option values
3413 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3414 the right test for positive values.
3416 48. Domain names in DNS records are case-independent. Exim always looks them up
3417 in lower case. Some resolvers return domain names in exactly the case they
3418 appear in the zone file, that is, they may contain uppercase letters. Not
3419 all resolvers do this - some return always lower case. Exim was treating a
3420 change of case by a resolver as a change of domain, similar to a widening
3421 of a domain abbreviation. This triggered its re-routing code and so it was
3422 trying to route what was effectively the same domain again. This normally
3423 caused routing to fail (because the router wouldn't handle the domain
3424 twice). Now Exim checks for this case specially, and just changes the
3425 casing of the domain that it ultimately uses when it transmits the message
3428 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3431 50. If a filter generated a file delivery with a non-absolute name (possible if
3432 no home directory exists for the router), the forbid_file option was not
3435 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3436 the existing equality matching.
3438 52. Exim was using ints instead of ino_t variables in some places where it was
3439 dealing with inode numbers.
3441 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3442 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3443 called TMPDIR, and if it finds it is different, it changes its value.
3445 54. The smtp_printf() function is now made available to local_scan() so
3446 additional output lines can be written before returning. There is also an
3447 smtp_fflush() function to enable the detection of a dropped connection.
3448 The variables smtp_input and smtp_batched_input are exported to
3451 55. Changed the default runtime configuration: the message "Unknown user"
3452 has been removed from the ACL, and instead placed on the localuser router,
3453 using the cannot_route_message feature. This means that any verification
3454 failures that generate their own messages won't get overridden. Similarly,
3455 the "Unrouteable address" message that was in the ACL for unverifiable
3456 relay addresses has also been removed.
3458 56. Added hosts_avoid_esmtp to the smtp transport.
3460 57. The exicyclog script was not checking for the esoteric option
3461 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3462 will work only if exicyclog is run under the appropriate euid.
3464 58. Following a discussion on the list, the rules by which Exim recognises line
3465 endings on incoming messages have been changed. The -dropcr and drop_cr
3466 options are now no-ops, retained only for backwards compatibility. The
3467 following line terminators are recognized: LF CRLF CR. However, special
3468 processing applies to CR:
3470 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3471 nor a local message in the state where . is a terminator.
3473 (ii) If a bare CR is encountered in a header line, an extra space is added
3474 after the line terminator so as not to end the header. The reasoning
3475 behind this is that bare CRs in header lines are most likely either
3476 to be mistakes, or people trying to play silly games.
3478 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3479 was being incorrectly given as 18 bytes larger than it should have been.
3480 This is a VOB (very old bug).
3482 60. This may never have affected anything current, but just in case it has:
3483 When the local host is found other than at the start of a list of hosts,
3484 the local host, those with the same MX, and any that follow, are discarded.
3485 When the list in question was part of a longer list of hosts, the following
3486 hosts (not currently being processed) were also being discarded. This no
3487 longer happens. I'm not sure if this situation could ever has previously
3490 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3493 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3494 header. This is something that is recommended in a new Internet Draft, and
3495 is something that is documented as being done by Sendmail. There are two
3496 possible values. For messages generated by the autoreply transport, Exim
3499 Auto-Submitted: auto-replied
3501 whereas for all other generated messages (e.g. bounces) it adds
3503 Auto-Submitted: auto-generated
3505 63. The "personal" condition in filters now includes a test for the
3506 Auto-Submitted: header. If it contains the string "auto-" the message it
3507 not considered personal.
3509 64. Added rcpt_include_affixes as a generic transport option.
3511 65. Added queue_only_override (default true).
3513 66. Added the syslog_duplication option.
3515 67. If what should have been the first header line of a message consisted of
3516 a space followed by a colon, Exim was mis-interpreting it as a header line.
3517 It isn't of course - it is syntactically invalid and should therefore be
3518 treated as the start of the message body. The misbehaviour could have
3519 caused a number of strange effects, including loss of data in subsequent
3520 header lines, and spool format errors.
3522 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3523 client host had authenticated. This control can now be exercised by an ACL
3524 for more flexibility.
3526 69. By default, callouts do not happen when testing with -bh. There is now a
3527 variant, -bhc, which does actually run the callout code, including
3528 consulting and updating the callout cache.
3530 70. Added support for saslauthd authentication, courtesy of Alexander
3533 71. If statvfs() failed on the spool or log directories while checking their
3534 size for availability, Exim confusingly gave the error "space shortage".
3535 Furthermore, in debugging mode it crashed with a floating point exception.
3536 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3537 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3538 serious problem, Exim now writes to the main and panic logs when this
3539 happens, with details of the failure. It then refuses to accept the
3540 incoming message, giving the message "spool directory problem" or "log
3541 directory problem" with a 421 code for SMTP messages.
3543 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3544 0, 1, and 2 exist, because some OS complain for execs without them (see
3545 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3546 descriptors. However, the code omitted to check that the open succeeded,
3547 causing mysterious errors if for some reason the permissions on /dev/null
3548 got screwed. Now Exim writes a message to the main and panic logs, and
3549 bombs out if it can't open /dev/null.
3551 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3552 interact so that it is all more flexible. It is supposed to remain
3553 backwards compatible. Also added extra_local_interfaces.
3555 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3556 to bomb out with an assertion failure - to the client this appears as a
3557 connection drop. This problem occurs in the part of the code that was taken
3558 from the Samba project. Fortunately, the assertion is in a very simple
3559 function, so I have fixed this by reproducing the function inline in the
3560 one place where it is called, and arranging for authentication to fail
3561 instead of killing the process with assert().
3563 75. The SPA client code was not working when the server requested OEM rather
3564 than Unicode encoding.
3566 76. Added code to make require_files with a specific uid setting more usable in
3567 the case where statting the file as root fails - usually a non-root-mounted
3568 NFS file system. When this happens and the failure is EACCES, Exim now
3569 forks a subprocess and does the per-uid checking as the relevant uid.
3571 77. Added process_log_path.
3573 78. If log_file_path was not explicitly set, a setting of check_log_space or
3574 check_log_inodes was ignored.
3576 79. If a space check for the spool or log partitions fails, the incident is now
3577 logged. Of course, in the latter case the data may get lost...
3579 80. Added the %p formatting code to string_format() so that it can be used to
3580 print addresses in debug_print(). Adjusted all the address printing in the
3581 debugging in store.c to use %p rather than %d.
3583 81. There was a concern that a line of code in smtp_in.c could overflow a
3584 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3585 initially expressed, the concern was not well-founded, because trailing
3586 spaces are removed early. However, if the trailing spaces were followed by
3587 a NULL, they did not get removed, so the overflow was possible. Two fixes
3590 (a) I re-wrote the offending code in a cleaner fashion.
3591 (b) If an incoming SMTP command contains a NULL character, it is rejected
3594 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3595 runs initgroups(), so that if the Exim user is in any additional groups,
3596 they will be used during message reception.
3602 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob