1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.256 2005/11/14 11:32:16 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Two changes to the default runtime configuration:
11 (1) Move the checks for relay_from_hosts and authenticated clients from
12 after to before the (commented out) DNS black list checks.
14 (2) Add control=submission to the relay_from_hosts and authenticated
15 clients checks, on the grounds that messages accepted by these
16 statements are most likely to be submissions.
18 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
20 (1) Generate an error if the third argument for the ${prvs expansion is
23 (2) Treat a missing third argument of ${prvscheck as if it were an empty
26 (3) Reset the variables that are obtained from the first argument of
27 ${prvscheck and used in the second argument before leaving the code,
28 because their memory is reclaimed, so using them afterwards may do
31 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
32 one (it's much easier than Tom thought :-).
34 (5) Because of (4), we can now allow for the use of $prvscheck_result
35 inside the third argument.
37 PH/03 For some reason, the default setting of PATH when running a command from
38 a pipe transport was just "/usr/bin". I have changed it to
41 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
42 anything to be listed in the output from -bV.
44 PH/05 When a filter generated an autoreply, the entire To: header line was
45 quoted in the delivery log line, like this:
47 => >A.N.Other <ano@some.domain> <original@ddress> ...
49 This has been changed so that it extracts the operative address. There
50 may be more than one such address. If so, they are comma-separated, like
53 => >ano@some.domain,ona@other.domain <original@ddress> ...
55 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
56 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
57 not being looked up in the rDNS to get a host name, Exim was showing the
58 IP address twice in Received: lines, even though the IP addresses were
59 identical. For example:
61 Received: from [1.2.3.4] (helo=[1.2.3.4])
63 However, if the real host name was known, it was omitting the HELO data
64 if it matched the actual IP address. This has been tidied up so that it
65 doesn't show the same IP address twice.
67 PH/07 When both +timestamp and +memory debugging was on, the value given by
68 $tod_xxx expansions could be wrong, because the tod_stamp() function was
69 called by the debug printing, thereby overwriting the timestamp buffer.
70 Debugging no longer uses the tod_stamp() function when +timestamp is set.
72 PH/08 When the original message was included in an autoreply transport, it
73 always said "this is a copy of the message, including all the headers",
74 even if body_only or headers_only was set. It now gives an appropriate
81 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
82 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
85 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
86 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
88 PH/03 Typo: missing ".o" in src/pcre/Makefile.
90 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
91 header line, restrict the check to what is listed in RFCs 2369 and 2929.
92 Also, for "Auto-Submitted", treat anything other than "no" as
93 non-personal, in accordance with RFC 3834. (Previously it treated
94 anything starting "auto-" as non-personal.)
96 TF/01 The control=submission/name=... option had a problem with syntax
97 errors if the name included a slash character. The /name= option
98 now slurps the rest of the string, so it can include any characters
99 but it must come last in the list of options (after /sender_retain
102 PH/05 Some modifications to the interface to the fake nameserver for the new
109 TK/01 Added the "success_on_redirect" address verification option. See
110 NewStuff for rationale and an example.
112 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
114 PH/02 Patch to exigrep to allow it to work on syslog lines.
116 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
117 fread() to skip over the body file's header line, because in Cygwin the
118 header line is locked and is inaccessible.
120 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
121 co-exist for some time) to make it clear that it is the Exim ID that is
122 referenced, not the Message-ID: header line.
124 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
125 string_format() function, because snprintf() does not exist on all
128 PH/06 The use of forbid_filter_existstest now also locks out the use of the
129 ${stat: expansion item.
131 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
132 protocol synchronization error", to keep the pedants happy.
134 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
135 well as for IRIX systems, when gcc is being used. See the host.c source
138 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
140 PH/10 Named domain lists were not working if used in a queue_smtp_domains
143 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
144 transport and to the smtp transport in LMTP mode.
146 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
148 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
149 run a filter in a subprocess. This could lead to confusion in subsequent
150 lookups in the parent process. There should also be a search_tidyup() at
151 the end of the subprocess.
153 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
154 only if the host matched helo_try_verify_hosts, which caused the
155 verification to occur when the EHLO/HELO command was issued. The ACL just
156 tested the remembered result. Now, if a previous verification attempt has
157 not happened, "verify = helo" does it there and then.
159 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
161 TK/03 Fix log output including CR from clamd.
163 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
164 exist provoked a memory error which could cause a segfault.
166 PH/15 Installed PCRE 6.2
168 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
170 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
171 of the problem. Specifically, suggested +O2 rather than +O1 for the
174 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
176 PH/20 If a delivery was routed to a non-standard port by means of an SRV
177 record, the port was not correctly logged when the outgoing_port log
178 selector was set (it logged the transort's default port).
180 PH/21 Added support for host-specific ports to manualroute, queryprogram,
181 fallback_hosts, and "hosts" in the smtp transport.
183 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
184 host errors such as "Connection refused".
186 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
187 authentication with radiusclient 0.4.9:
189 - Error returned from rc_read_config was caught wrongly
190 - Username/password not passed on to radius server due to wrong length.
192 The presumption is that some radiusclient API changes for 4.51/PH/17
193 were not taken care of correctly. The code is still untested by me (my
194 Linux distribution still has 0.3.2 of radiusclient), but it was
195 contributed by a Radius user.
197 PH/24 When doing a callout, the value of $domain wasn't set correctly when
198 expanding the "port" option of the smtp transport.
200 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
201 while reading a MIME header. Thanks to Tom Hughes for a patch.
203 PH/24 Include config.h inside local_scan.h so that configuration settings are
206 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
207 that in an ACL for RCPT (for example), you can examine exactly what was
210 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
211 commands, but it was not correctly comparing the address with the actual
212 client host address. Thus, it would show the EHLO address in Received:
213 header lines when this was not necessary.
215 PH/27 Added the % operator to ${eval:}.
217 PH/28 Exim tries to create and chdir to its spool directory when it starts;
218 it should be ignoring failures (because with -C, for example, it has lost
219 privilege). It wasn't ignoring creation failures other than "already
222 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
225 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
226 because an input line was too long, either on its own, or by virtue of
227 too many continuations, the temporary file was not being removed, and the
228 return code was incorrect.
230 PH/31 Missing "BOOL" in function definition in filtertest.c.
232 PH/32 Applied Sieve patches from the maintainer.
234 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
236 PH/33 Added "verify = not_blind".
238 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
239 Local/Makefile (with some defaults set). These are used in built scripts
240 such as exicyclog, but they have never been used in the exim_install
241 script (though there are many overriding facilities there). I have
242 arranged that the exim_install script now takes note of these two
245 PH/35 Installed configuration files for Dragonfly.
247 PH/36 When a locally submitted message by a trusted user did not contain a
248 From: header, and the sender address was obtained from -f or from an SMTP
249 MAIL command, and the trusted user did not use -F to supply a sender
250 name, $originator_name was incorrectly used when constructing a From:
251 header. Furthermore, $originator_name was used for submission mode
252 messages from external hosts without From: headers in a similar way,
253 which is clearly wrong.
255 PH/37 Added control=suppress_local_fixups.
257 PH/38 When log_selector = +received_sender was set, and the addition of the
258 sender made the log line's construction buffer exactly full, or one byte
259 less than full, an overflow happened when the terminating "\n" was
262 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
263 when the result of a list match is failure because a DNS lookup failed.
265 PH/40 RM_COMMAND is now used in the building process.
267 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
268 the "build-* directories that it finds.
270 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
271 address in a domain literal was a prefix of an interface address.
273 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
274 when verifying a sender address, unless rewrite_headers is false.
276 PH/44 Wrote a long comment about why errors_to addresses are verified as
277 recipients, not senders.
279 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
280 the ratelimit ACL was added.
282 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
284 PH/46 Added extra information about PostgreSQL errors to the error string.
286 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
287 avoiding the need to install special zones in a real server. This is
288 backwards compatible; if it can't find the fake resolver, it drops back.
289 Thus, both old and new test suites can be run.
291 TF/02 Added util/ratelimit.pl
293 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
294 clock is set back in time.
296 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
297 Candler <B.Candler@pobox.com>.
299 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
300 OK for addresses that are the result of redirections.
302 PH/48 A number of further additions for the benefit of the new test suite,
303 including a fake gethostbyname() that interfaces to the fake DNS resolver
306 TF/06 The fix for widen_domains has also been applied to qualify_single and
307 search_parents which are the other dnslookup options that can cause
310 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
313 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
315 TF/07 Exim produced the error message "an SRV record indicated no SMTP
316 service" if it encountered an MX record with an empty target hostname.
317 The message is now "an MX or SRV record indicated no SMTP service".
319 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
320 if the DNS of the sending site is misconfigured. This is quite a
321 common situation. This change restores the behaviour of treating a
322 helo verification defer as a failure.
324 PH/51 If self=fail was set on a router, the bounce message did not include the
325 actual error message.
331 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
333 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
334 command itself ended in error, the underlying message about the transport
335 filter timeout was being overwritten with the pipe command error. Now the
336 underlying error message should be appended to the second error message.
338 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
340 PH/02 Reduce the amount of output that "make" produces by default. Full output
341 can still be requested.
343 PH/03 The warning log line about a condition test deferring for a "warn" verb
344 was being output only once per connection, rather than after each
345 occurrence (because it was using the same function as for successful
346 "warn" verbs). This seems wrong, so I have changed it.
348 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
349 it should not have, which might have caused a crash in the right
350 circumstances, but probably never did.
352 PH/04 Installed a modified version of Tony Finch's patch to make submission
353 mode fix the return path as well as the Sender: header line, and to
354 add a /name= option so that you can make the user's friendly name appear
357 TF/03 Added the control = fakedefer ACL modifier.
359 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
360 Mark Lowes for thorough testing.
362 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
364 TK/03 Merged latest SRS patch from Miles Wilton.
366 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
367 with the definition in sysexits.h (which is #included earlier).
368 Fortunately, Exim does not actually use EX_OK. The code used to try to
369 preserve the sysexits.h value, by assumimg that macro definitions were
370 scanned for macro replacements. I have been disabused of this notion,
371 so now the code just undefines EX_OK before #including unistd.h.
373 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
374 in the smtp transport. When a block could not be written in a single
375 write() function, the timeout was being re-applied to each part-write.
376 This seems wrong - if the receiver was accepting one byte at a time it
377 would take for ever. The timeout is now adjusted when this happens. It
378 doesn't have to be particularly precise.
380 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
381 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
383 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
384 without a domain if the check to <postmaster@domain> fails.
386 SC/01 Eximstats: added -xls and the ability to specify output files
387 (patch written by Frank Heydlauf).
389 SC/02 Eximstats: use FileHandles for outputing results.
391 SC/03 Eximstats: allow any combination of xls, txt, and html output.
393 SC/04 Eximstats: fixed display of large numbers with -nvr option
395 SC/05 Eximstats: fixed merging of reports with empty tables.
397 SC/06 Eximstats: added the -include_original_destination flag
399 SC/07 Eximstats: removed tabs and trailing whitespace.
401 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
403 TK/06 MBOX spool code: Add real "From " MBOX separator line
404 so the .eml file is really in mbox format (even though
405 most programs do not really care). Patch from Alex Miller.
407 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
408 The latter is generated from $received_to and is only set if the
409 message has one envelope recipient. SA can use these headers,
410 obviously out-of-the-box. Patch from Alex Miller.
412 PH/08 The ${def test on a variable was returning false if the variable's
413 value was "0", contrary to what the specification has always said!
414 The result should be true unless the variable is empty.
416 PH/09 The syntax error of a character other than { following "${if
417 def:variable_name" (after optional whitespace) was not being diagnosed.
418 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
419 accidental colon was present, for example, could give incorrect results.
421 PH/10 Tidied the code in a number of places where the st_size field of a stat()
422 result is used (not including appendfile, where other changes are about
425 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
426 This involved changing a lot of size variables from int to off_t. It
427 should work with maildirs and everything.
429 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
430 spamd dying while we are connected to it.
432 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
435 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
436 function for BDB 4.3.
438 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
440 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
441 the sources for PCRE have been re-arranged and more files are now
444 PH/15 The code I had for printing potentially long long variables in PH/11
445 above was not the best (it lost precision). The length of off_t variables
446 is now inspected at build time, and an appropriate printing format (%ld
447 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
448 to be "long long int" or "long int". This is needed for the internal
449 formatting function string_vformat().
451 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
452 the configuration file to be ":syslog", then the script "guesses" where
453 the logs files are, rather than using the compiled in default. In our
454 case the guess is not the same as the compiled default, so the script
455 suddenly stopped working when I started to use syslog. The patch checks
456 to see if log_file_path is "". If so, it attempts to read it from exim
457 with no configuration file to get the compiled in version, before it
458 falls back to the previous guessing code."
460 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
461 implementing BATV in an Exim configuration. See NewStuff for the gory
464 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
465 Makefile that are specific to HP-UX.
467 PH/18 If the "use_postmaster" option was set for a recipient callout together
468 with the "random" option, the postmaster address was used as the MAIL
469 FROM address for the random test, but not for the subsequent recipient
470 test. It is now used for both.
472 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
473 patch removes a few documentation additions to RFC 3028, because the
474 latest draft now contains them. It adds the new en;ascii-case comparator
475 and a new error check for 8bit text in MIME parts. Comparator and
476 require names are now matched exactly. I enabled the subaddress
477 extension, but it is not well tested yet (read: it works for me)."
479 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
480 rework some of the code of TK/09 above to avoid the hardwired use of
481 "%lld" and "long long". Replaced the call to snprintf() with a call to
484 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
485 records point to non-existent hosts", "retry timeout exceeded", and
486 "retry time not reached for any host after a long failure period".
488 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
489 experimental DomainKeys support:
491 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
492 (2) On an error such as an illegally used "control", the wrong name for
493 the control was given.
495 These problems did NOT occur unless DomainKeys support was compiled.
497 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
499 PH/24 Added ${if match_ip condition.
501 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
502 databases so that it will be absolutely obvious if a crash occurs in the
503 DB library. This is a regular occurrence (often caused by mis-matched
506 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
507 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
508 picked up on a user's system that detects such things. There doesn't seem
509 to be a gcc warning option for this - only an attribute that has to be
510 put on the function's prototype. It seems that in Fedora Core 4 they have
511 set this on a number of new functions. No doubt there will be more in due
514 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
515 specify a transport. However, if an address that was verified by such a
516 router was the subject of a callout, Exim crashed because it tried to
517 read the rcpt_include_affixes from the non-existent transport. Now it
518 just assumes that the setting of that option is false. This bug was
519 introduced by 4.51/PH/31.
521 PH/28 Changed -d+all to exclude +memory, because that information is very
522 rarely of interest, but it makes the output a lot bigger. People tend to
523 do -d+all out of habit.
525 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
526 code in os-type was giving problems when libc.so lives in lib64, like on
529 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
530 aren't the modern standard, and it seems that some systems' include files
531 don't always have them. Exim was already checking for some of the newer
532 ones like T_AAAA, and defining it itself. I've added checks for all the
533 record types that Exim uses.
535 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
536 not automatically generating a new one, as it is supposed to. This
537 prevented TLS from working. If the file did exist, but contained invalid
538 data, a new version was generated, as expected. It was only the case of a
539 non-existent file that was broken.
541 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
542 with a change in libdomainkeys > 0.64.
544 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
545 from DNS. If the selector record carries the flag, it now has
546 precedence over the domain-wide flag.
548 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
550 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
551 the use of a port name that isn't defined in /etc/services) occurred, the
552 message was deferred as in a normal delivery, and thus remained on the
553 spool, instead of being failed because of the mua_wrapper setting. This
554 is now fixed, and I tidied up some of the mua_wrapper messages at the
557 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
558 the messages in a hash of arrays rather than using individual hashes.
559 This is a bit cleaner and results in dramatic memory savings, albeit
560 at a slight CPU cost.
562 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
563 as requested by Marc Sherman.
565 SC/10 Eximstats: added histograms for user specified patterns as requested
568 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
570 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
571 fopen() in the content-scanning modules that did not already have it.
577 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
578 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
580 TK/02 Fix ACL "control" statement not being available in MIME ACL.
582 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
584 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
585 to test Sieve filters that use "vacation".
587 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
588 that changes the way the GnuTLS parameters are stored in the cache file.
589 The new format can be generated externally. For backward compatibility,
590 if the data in the cache doesn't make sense, Exim assumes it has read an
591 old-format file, and it generates new data and writes a new file. This
592 means that you can't go back to an older release without removing the
595 PH/03 A redirect router that has both "unseen" and "one_time" set does not
596 work if there are any delivery delays because "one_time" forces the
597 parent to be marked "delivered", so its unseen clone is never tried
598 again. For this reason, Exim now forbids the simultaneous setting of
601 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
602 redirected to themselves ("homonym" addresses). Read the long ChangeLog
603 entry if you want to know the details. The fix, however, neglected to
604 consider the case when local delivery batching is involved. The test for
605 "previously delivered" was not happening when checking to see if an
606 address could be batched with a previous (undelivered) one; under
607 certain circumstances this could lead to multiple deliveries to the same
610 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
611 in its include files, and this causes problems building Exim.
613 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
614 header_syntax) but Exim was just ignoring anything given after a slash.
615 In particular, this caused confusion with an attempt to use "verify =
616 reverse_host_lookup/defer_ok". An error is now given when options are
617 supplied for verify items that do not have them. (Maybe reverse_host_
618 lookup should have a defer_ok option, but that's a different point.)
620 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
621 defined by RFC 821) to 2048, because there were problems with some AUTH
622 commands, and RFC 1869 says the size should be increased for extended
623 SMTP commands that take arguments.
625 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
628 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
629 "unknown" error; now it says that the functionality isn't in the binary.
631 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
632 an address' error message when a string expansion fails (syntax or
633 whatever). Otherwise the password may appear in the log. Following change
634 PH/42 below, there is no longer a chance of it appearing in a bounce
637 PH/11 Installed exipick version 20050225.0 from John Jetmore.
639 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
640 of its addresses was ever tried. (Bugzilla bug #2.)
642 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
643 the result incorrectly in the debug output. (It correctly added a newline
644 to what was transported.)
646 TF/01 Added $received_time.
648 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
649 commented out examples of how to interface to a virus scanner and to
650 SpamAssassin. Also added commented examples of av_scanner and
651 spamd_address settings.
653 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
654 and controls are allowed in which ACLs. There were a couple of minor
655 errors. Some of the entries in the conditions table (which is a table of
656 where they are NOT allowed) were getting very unwieldy; rewrote them as a
657 negation of where the condition IS allowed.
659 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
661 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
662 header file does not have a version number, so I've had to invent a new
663 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
664 API. The code is untested by me (my Linux distribution still has 0.3.2 of
665 radiusclient), but it was contributed by a Radius user.
667 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
668 files or directories, for OpenSSL.
670 PH/19 When an Exim process that is running as root has to create an Exim log
671 file, it does so in a subprocess that runs as exim:exim so as to get the
672 ownership right at creation (otherwise, other Exim processes might see
673 the file with the wrong ownership). There was no test for failure of this
674 fork() call, which would lead to the process getting stuck as it waited
675 for a non-existent subprocess. Forks do occasionally fail when resources
676 run out. I reviewed all the other calls to fork(); they all seem to check
679 PH/20 When checking for unexpected SMTP input at connect time (before writing
680 the banner), Exim was not dealing correctly with a non-positive return
681 from the read() function. If the client had disconnected by this time,
682 the result was a log entry for a synchronization error with an empty
683 string after "input=" when read() returned zero. If read() returned -1
684 (an event I could not check), uninitialized data bytes were printed.
685 There were reports of junk text (parts of files, etc) appearing after
688 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
690 PH/22 Added support for macro redefinition, and (re)definition in between
691 driver and ACL definitions.
693 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
694 forgetting to use the resulting value; it was using the unexpanded value.
696 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
697 hadn't been configured. The fix is from Juergen Kreileder, who
698 understands it better than I do:
700 "Here's what I see happening with three configured cyrus_sasl
701 authenticators configured (plain, login, cram-md5):
703 On startup auth_cyrus_sasl_init() gets called for each of these.
704 This means three calls to sasl_listmech() without a specified mech_list.
705 => SASL tests which mechs of all available mechs actually work
706 => three warnings about OTP not working
707 => the returned list contains: plain, login, cram-md5, digest-md5, ...
709 With the patch, sasl_listmech() also gets called three times. But now
710 SASL's mech_list option is set to the server_mech specified in the the
711 authenticator. Or in other words, the answer from sasl_listmech()
712 gets limited to just the mech you're testing for (which is different
714 => the return list contains just 'plain' or 'login', 'cram-md5' or
715 nothing depending on the value of ob->server_mech.
717 I've just tested the patch: Authentication still works fine,
718 unavailable mechs specified in the exim configuration are still
719 caught, and the auth.log warnings about OTP are gone."
721 PH/25 When debugging is enabled, the contents of the command line are added
722 to the debugging output, even when log_selector=+arguments is not
725 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
726 answer is "GNU", and only if the return is "GNU/something" is the answer
729 PH/27 $acl_verify_message is now set immediately after the failure of a
730 verification in an ACL, and so is available in subsequent modifiers. In
731 particular, the message can be preserved by coding like this:
733 warn !verify = sender
734 set acl_m0 = $acl_verify_message
736 Previously, $acl_verify_message was set only while expanding "message"
737 and "log_message" when a very denied access.
739 PH/28 Modified OS/os.c-Linux with
741 -#ifndef OS_LOAD_AVERAGE
742 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
744 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
745 nomenclature these days.)
747 PH/29 Installed patch from the Sieve maintainer that adds the options
748 sieve_useraddress and sieve_subaddress to the redirect router.
750 PH/30 In these circumstances:
751 . Two addresses routed to the same list of hosts;
752 . First host does not offer TLS;
753 . First host accepts first address;
754 . First host gives temporary error to second address;
755 . Second host offers TLS and a TLS session is established;
756 . Second host accepts second address.
757 Exim incorrectly logged both deliveries with the TLS parameters (cipher
758 and peerdn, if requested) that were in fact used only for the second
761 PH/31 When doing a callout as part of verifying an address, Exim was not paying
762 attention to any local part prefix or suffix that was matched by the
763 router that accepted the address. It now behaves in the same way as it
764 does for delivery: the affixes are removed from the local part unless
765 rcpt_include_affixes is set on the transport.
767 PH/32 Add the sender address, as F=<...>, to the log line when logging a
768 timeout during the DATA phase of an incoming message.
770 PH/33 Sieve envelope tests were broken for match types other than :is. I have
771 applied a patch sanctioned by the Sieve maintainer.
773 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
774 the uid or gid is negative. A case of a negative gid caused this to be
775 noticed. The fix allows for either to be negative.
777 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
778 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
781 PH/36 The change PH/12 above was broken. Fixed it.
783 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
784 the grounds that routing the same address twice would always produce the
785 same answer. This might have been true once, but it is certainly no
786 longer true now. Routing a child address may depend on the previous
787 routing that produced that child. Some complicated redirection strategies
788 went wrong when messages had multiple recipients, and made Exim's
789 behaviour dependent on the order in which the addresses were given.
791 I have moved the duplicate checking until after the routing is complete.
792 Exim scans the addresses that are assigned to local and remote
793 transports, and removes any duplicates. This means that more work will be
794 done, as duplicates will always all be routed, but duplicates are
795 presumably rare, so I don't expect this is of any significance.
797 For deliveries to pipes, files, and autoreplies, the duplicate checking
798 still happens during the routing process, since they are not going to be
801 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
802 It corrects a timeout issue with spamd. This is Ian's comment: "The
803 background is that sometimes spamd either never reads data from a
804 connection it has accepted, or it never writes response data. The exiscan
805 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
806 blindly assumes that writes won't block so it may never time out."
808 PH/39 Allow G after quota size as well as K and M.
810 PH/40 The value set for $authenticated_id in an authenticator may not contain
811 binary zeroes or newlines because the value is written to log lines and
812 to spool files. There was no check on this. Now the value is run through
813 the string_printing() function so that such characters are converted to
814 printable escape sequences.
816 PH/41 $message_linecount is a new variable that contains the total number of
817 lines in the message. Compare $body_linecount, which is the count for the
820 PH/42 Exim no longer gives details of delivery errors for specific addresses in
821 bounce and delay warning messages, except in certain special cases, which
824 (a) An SMTP error message from a remote host;
825 (b) A message specified in a :fail: redirection;
826 (c) A message specified in a "fail" command in a system filter;
827 (d) A message specified in a FAIL return from the queryprogram router;
828 (e) A message specified by the cannot_route_message router option.
830 In these cases only, Exim does include the error details in bounce and
831 warning messages. There are also a few cases where bland messages such
832 as "unrouteable address" or "local delivery error" are given.
834 PH/43 $value is now also set for the "else" part of a ${run expansion.
836 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
837 being worked on, but at least Exim now implements the latest version to
840 PH/45 In a pipe transport, although a timeout while waiting for the pipe
841 process to complete was treated as a delivery failure, a timeout while
842 writing the message to the pipe was logged, but erroneously treated as a
843 successful delivery. Such timeouts include transport filter timeouts. For
844 consistency with the overall process timeout, these timeouts are now
845 treated as errors, giving rise to delivery failures by default. However,
846 there is now a new Boolean option for the pipe transport called
847 timeout_defer, which, if set TRUE, converts the failures into defers for
848 both kinds of timeout. A transport filter timeout is now identified in
851 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
852 systems where "make" and "gmake" are different, calling "gmake" at top
853 level broke things. I've arranged for the value of $(MAKE) to be passed
854 from the Makefile to this script so that it can call the same version of
858 A note about Exim versions 4.44 and 4.50
859 ----------------------------------------
861 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
862 changes of various kinds. As a consequence, a big documentation update was
863 needed. This delayed the release for rather longer than seemed good, especially
864 in the light of a couple of (minor) security issues. Therefore, the changes
865 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
866 release. So 4.44 and 4.50 are in effect two different branches that both start
869 I have left the 4.50 change log unchanged; it contains all the changes since
870 4.43. The change log for 4.44 is below; many of its items are identical to
871 those for 4.50. This seems to be the most sensible way to preserve the
872 historical information.
878 1. Minor wording change to the doc/README.SIEVE file.
880 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
881 computation of the current number of files was incorrect.
883 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
884 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
887 4. Give more explanation in the error message when the command for a transport
888 filter fails to execute.
890 5. There are several places where Exim runs a non-Exim command in a
891 subprocess. The SIGUSR1 signal should be disabled for these processes. This
892 was being done only for the command run by the queryprogram router. It is
893 now done for all such subprocesses. The other cases are: ${run, transport
894 filters, and the commands run by the lmtp and pipe transports.
896 6. Added CONFIGURE_GROUP build-time option.
898 7. Some older OS have a limit of 256 on the maximum number of file
899 descriptors. Exim was using setrlimit() to set 1000 as a large value
900 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
901 systems. I've change it so that if it can't get 1000, it tries for 256.
903 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
904 was an oversight, and furthermore, ever since the addition of extra
905 controls (e.g. 4.43/32), the checks on when to allow different forms of
906 "control" were broken. There should now be diagnostics for all cases when a
907 control that does not make sense is encountered.
909 9. Added the /retain_sender option to "control=submission".
911 10. $recipients is now available in the predata ACL (oversight).
913 11. Tidy the search cache before the fork to do a delivery from a message
914 received from the command line. Otherwise the child will trigger a lookup
915 failure and thereby defer the delivery if it tries to use (for example) a
916 cached ldap connection that the parent has called unbind on.
918 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
919 of $address_data from the recipient verification was clobbered by the
922 13. The value of address_data from a sender verification is now available in
923 $sender_address_data in subsequent conditions in the ACL statement.
925 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
927 15. Added a new option "connect=<time>" to callout options, to set a different
930 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
931 was its contents. (It was OK if the option was not defined at all.)
933 17. A "Completed" log line is now written for messages that are removed from
934 the spool by the -Mrm option.
936 18. New variables $sender_verify_failure and $recipient_verify_failure contain
937 information about exactly what failed.
939 19. Added -dd to debug only the daemon process.
941 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
942 handles timeouts, both on the server side and network timeouts. Renamed the
943 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
945 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
946 It is now set to "smtps".
948 22. $host_address is now set to the target address during the checking of
951 23. When checking ignore_target_hosts for an ipliteral router, no host name was
952 being passed; this would have caused $sender_host_name to have been used if
953 matching the list had actually called for a host name (not very likely,
954 since this list is usually IP addresses). A host name is now passed as
957 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
958 code that specifies a non-restarting handler (typically sigaction() in
959 modern systems) in an attempt to fix a rare and obscure crash bug.
961 25. Narrowed the window for a race in the daemon that could cause it to ignore
962 SIGCHLD signals. This is not a major problem, because they are used only to
963 wake it up if nothing else does.
965 26. A malformed maildirsize file could cause Exim to calculate negative values
966 for the mailbox size or file count. Odd effects could occur as a result.
967 The maildirsize information is now recalculated if the size or filecount
970 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
971 support for a long time. Removed HAVE_SYS_VFS_H.
973 28. Installed the latest version of exipick from John Jetmore.
975 29. In an address list, if the pattern was not a regular expression, an empty
976 subject address (from a bounce message) matched only if the pattern was an
977 empty string. Non-empty patterns were not even tested. This was the wrong
978 because it is perfectly reasonable to use an empty address as part of a
979 database query. An empty address is now tested by patterns that are
980 lookups. However, all the other forms of pattern expect the subject to
981 contain a local part and a domain, and therefore, for them, an empty
982 address still always fails if the pattern is not itself empty.
984 30. Exim went into a mad DNS loop when attempting to do a callout where the
985 host was specified on an smtp transport, and looking it up yielded more
988 31. Re-factored the code for checking spool and log partition space into a
989 function that finds that data and another that does the check. The former
990 is then used to implement four new variables: $spool_space, $log_space,
991 $spool_inodes, and $log_inodes.
993 32. The RFC2047 encoding function was originally intended for short strings
994 such as real names; it was not keeping to the 75-character limit for
995 encoded words that the RFC imposes. It now respects the limit, and
996 generates multiple encoded words if necessary. To be on the safe side, I
997 have increased the buffer size for the ${rfc2047: expansion operator from
1000 33. It is now permitted to omit both strings after an "if" condition; if the
1001 condition is true, the result is "true". As before, when the second string
1002 is omitted, a false condition yields an empty string. This makes it less
1003 cumbersome to write custom ACL and router conditions.
1005 34. Failure to deliver a bounce message always caused it to be frozen, even if
1006 there was an errors_to setting on the router. The errors_to setting is now
1009 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1010 canonical form (fully expanded) before being placed in
1011 $sender_host_address.
1013 36. The table in the code that translates DNS record types into text (T_A to
1014 "A" for instance) was missing entries for NS and CNAME. It is just possible
1015 that this could have caused confusion if both these types were looked up
1016 for the same domain, because the text type is used as part of Exim's
1017 per-process caching. But the chance of anyone hitting this buglet seems
1020 37. The dnsdb lookup has been extended in a number of ways.
1022 (1) There is a new type, "zns", which walks up the domain tree until it
1023 finds some nameserver records. It should be used with care.
1025 (2) There is a new type, "mxh", which is like "mx" except that it returns
1026 just the host names, not the priorities.
1028 (3) It is now possible to give a list of domains (or IP addresses) to be
1029 looked up. The behaviour when one of the lookups defers can be
1030 controlled by a keyword.
1032 (4) It is now possible to specify the separator character for use when
1033 multiple records are returned.
1035 38. The dnslists ACL condition has been extended: it is now possible to supply
1036 a list of IP addresses and/or domains to be looked up in a particular DNS
1039 39. Added log_selector=+queue_time_overall.
1041 40. When running the queue in the test harness, wait just a tad after forking a
1042 delivery process, to get repeatability of debugging output.
1044 41. Include certificate and key file names in error message when GnuTLS fails
1045 to set them up, because the GnuTLS error message doesn't include the name
1046 of the failing file when there is a problem reading it.
1048 42. Allow both -bf and -bF in the same test run.
1050 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1052 44. The "Exiscan patch" is now merged into the mainline Exim source.
1054 45. Sometimes the final signoff response after QUIT could fail to get
1055 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1056 < 0 before doing a fflush(). This bug looks as though it goes back to the
1057 introduction of TLS in release 3.20, but "sometimes" must have been rare
1058 because the tests only now provoked it.
1060 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1061 (this can affect the format of dates).
1063 47. exim_tidydb, when checking for the continued existence of a message for
1064 which it has found a message-specific retry record, was not finding
1065 messages that were in split spool directories. Consequently, it was
1066 deleting retry records that should have stayed in existence.
1068 48. Steve fixed some bugs in eximstats.
1070 49. The SPA authentication driver was not abandoning authentication and moving
1071 on to the next authenticator when an expansion was forced to fail,
1072 contradicting the general specification for all authenticators. Instead it
1073 was generating a temporary error. It now behaves as specified.
1075 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1076 (the order specifies the preference for clients). The order is now AES256,
1077 AES128, 3DES, ARCFOUR128.
1079 51. Small patch to Sieve code - explicitly set From: when generating an
1082 52. Exim crashed if a remote delivery caused a very long error message to be
1083 recorded - for instance if somebody sent an entire SpamAssassin report back
1084 as a large number of 550 error lines. This bug was coincidentally fixed by
1085 increasing the size of one of Exim's internal buffers (big_buffer) that
1086 happened as part of the Exiscan merge. However, to be on the safe side, I
1087 have made the code more robust (and fixed the comments that describe what
1090 53. Now that there can be additional text after "Completed" in log lines (if
1091 the queue_time_overall log selector is set), a one-byte patch to exigrep
1092 was needed to allow it to recognize "Completed" as not the last thing in
1095 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1096 patch that reportedly fixes this has been added. I am not expert enough to
1097 create a test for it. This is what the patch creator wrote:
1099 "I found a little strange behaviour of ldap code when working with
1100 Windows 2003 AD Domain, where users was placed in more than one
1101 Organization Units. When I tried to give exim partial DN, the exit code
1102 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1103 But simultaneously result of request was absolutely normal ldap result,
1104 so I produce this patch..."
1106 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1107 REFERENCE, so I have modified the code to exclude the patch when that macro
1110 55. Some experimental protocols are using DNS PTR records for new purposes. The
1111 keys for these records are domain names, not reversed IP addresses. The
1112 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1113 leaves it alone. Component reversal etc. now happens only for IP addresses.
1116 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1118 57. Double the size of the debug message buffer (to 2048) so that more of very
1119 long debug lines gets shown.
1121 58. The exicyclog utility now does better if the number of log files to keep
1122 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1124 59. Two changes related to the smtp_active_hostname option:
1126 (1) $smtp_active_hostname is now available as a variable.
1127 (2) The default for smtp_banner uses $smtp_active_hostname instead
1128 of $primary_hostname.
1130 60. The host_aton() function is supposed to be passed a string that is known
1131 to be a valid IP address. However, in the case of IPv6 addresses, it was
1132 not checking this. This is a hostage to fortune. Exim now panics and dies
1133 if the condition is not met. A case was found where this could be provoked
1134 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1135 components; fortuitously, this particular loophole had already been fixed
1136 by change 4.50/55 above.
1138 If there are any other similar loopholes, the new check in host_aton()
1139 itself should stop them being exploited. The report I received stated that
1140 data on the command line could provoke the exploit when Exim was running as
1141 exim, but did not say which command line option was involved. All I could
1142 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1143 running as the user.
1146 61. There was a buffer overflow vulnerability in the SPA authentication code
1147 (which came originally from the Samba project). I have added a test to the
1148 spa_base64_to_bits() function which I hope fixes it.
1151 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1152 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1154 63. The daemon start-up calls getloadavg() while still root for those OS that
1155 need the first call to be done as root, but it missed one case: when
1156 deliver_queue_load_max is set with deliver_drop_privilege. This is
1157 necessary for the benefit of the queue runner, because there is no re-exec
1158 when deliver_drop_privilege is set.
1160 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1161 This has been fixed.
1163 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1164 was in use, was not putting the data itself into the right store pool;
1165 consequently, it could be overwritten for a subsequent message in the same
1166 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1169 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1171 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1172 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1173 the function were treating the return as a boolean value, which happened to
1174 work because 0=false and not-0=true, but is not correct code.
1176 68. The host_aton() function was not handling scoped IPv6 addresses (those
1177 with, for example, "%eth0" on the end) correctly.
1179 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1180 negated items (that is, ~something) in unsigned ints. Some compilers
1181 apparently mutter when there is no cast.
1183 70. If an address verification called from an ACL failed, and did not produce a
1184 user-specific message (i.e. there was only a "system" message), nothing was
1185 put in $acl_verify_message. In this situation, it now puts the system
1188 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1189 session; change 4.31/43 added the unwanted input to the log line - except
1190 that it did not do this in the start of session case. It now does.
1192 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1193 This is wrong and can cause the other end to generate a synchronization
1194 error if it is another Exim or anything else that does the synchronization
1195 check. A QUIT command is no longer sent after a timeout.
1197 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1198 during host lookups.
1200 74. The defer_ok option of callout verification was not working if it was used
1201 when verifying addresses in header lines, that is, for this case:
1203 verify = header_sender/callout=defer_ok
1205 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1206 those file descriptors could be used for SMTP connections. If anything
1207 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1208 could be sent to the SMTP client, causing chaos. The daemon now opens
1209 stdin, stdout, and stderr to /dev/null when it puts itself into the
1212 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1213 log by default. The user can override this with suitable Perl magic.
1215 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1216 the log message when discard triggers, was not working for the DATA ACL or
1217 for the non-SMTP ACL.
1219 78. Error message wording change in sieve.c.
1221 79. If smtp_accept_max_per_host was set, the number of connections could be
1222 restricted to fewer than expected, because the daemon was trying to set up
1223 a new connection before checking whether the processes handling previous
1224 connections had finished. The check for completed processes is now done
1225 earlier. On busy systems, this bug wouldn't be noticed because something
1226 else would have woken the daemon, and it would have reaped the completed
1229 80. If a message was submitted locally by a user whose login name contained one
1230 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1231 It caused a spool format error. I have fixed the spool reading code. A
1232 related problem was that the "from" clause in the Received: line became
1233 illegal because of the space(s). It is now covered by ${quote_local_part.
1235 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1238 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1240 83. Patch from Sieve maintainer to fix unterminated string problem in
1241 "vacation" handling.
1243 84. Some minor changes to the Linux configuration files to help with other
1244 OS variants using glibc.
1246 85. One more patch for Sieve to update vacation handling to latest spec.
1249 ----------------------------------------------------
1250 See the note above about the 4.44 and 4.50 releases.
1251 ----------------------------------------------------
1257 1. Change 4.43/35 introduced a bug that caused file counts to be
1258 incorrectly computed when quota_filecount was set in an appendfile
1261 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1262 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1265 3. Give more explanation in the error message when the command for a transport
1266 filter fails to execute.
1268 4. There are several places where Exim runs a non-Exim command in a
1269 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1270 was being done only for the command run by the queryprogram router. It is
1271 now done for all such subprocesses. The other cases are: ${run, transport
1272 filters, and the commands run by the lmtp and pipe transports.
1274 5. Some older OS have a limit of 256 on the maximum number of file
1275 descriptors. Exim was using setrlimit() to set 1000 as a large value
1276 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1277 systems. I've change it so that if it can't get 1000, it tries for 256.
1279 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1280 was an oversight, and furthermore, ever since the addition of extra
1281 controls (e.g. 4.43/32), the checks on when to allow different forms of
1282 "control" were broken. There should now be diagnostics for all cases when a
1283 control that does not make sense is encountered.
1285 7. $recipients is now available in the predata ACL (oversight).
1287 8. Tidy the search cache before the fork to do a delivery from a message
1288 received from the command line. Otherwise the child will trigger a lookup
1289 failure and thereby defer the delivery if it tries to use (for example) a
1290 cached ldap connection that the parent has called unbind on.
1292 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1293 of $address_data from the recipient verification was clobbered by the
1294 sender verification.
1296 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1297 was its contents. (It was OK if the option was not defined at all.)
1299 11. A "Completed" log line is now written for messages that are removed from
1300 the spool by the -Mrm option.
1302 12. $host_address is now set to the target address during the checking of
1303 ignore_target_hosts.
1305 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1306 being passed; this would have caused $sender_host_name to have been used if
1307 matching the list had actually called for a host name (not very likely,
1308 since this list is usually IP addresses). A host name is now passed as
1311 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1312 code that specifies a non-restarting handler (typically sigaction() in
1313 modern systems) in an attempt to fix a rare and obscure crash bug.
1315 15. Narrowed the window for a race in the daemon that could cause it to ignore
1316 SIGCHLD signals. This is not a major problem, because they are used only to
1317 wake it up if nothing else does.
1319 16. A malformed maildirsize file could cause Exim to calculate negative values
1320 for the mailbox size or file count. Odd effects could occur as a result.
1321 The maildirsize information is now recalculated if the size or filecount
1324 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1325 support for a long time. Removed HAVE_SYS_VFS_H.
1327 18. Updated exipick to current release from John Jetmore.
1329 19. Allow an empty sender to be matched against a lookup in an address list.
1330 Previously the only cases considered were a regular expression, or an
1333 20. Exim went into a mad DNS lookup loop when doing a callout where the
1334 host was specified on the transport, if the DNS lookup yielded more than
1337 21. The RFC2047 encoding function was originally intended for short strings
1338 such as real names; it was not keeping to the 75-character limit for
1339 encoded words that the RFC imposes. It now respects the limit, and
1340 generates multiple encoded words if necessary. To be on the safe side, I
1341 have increased the buffer size for the ${rfc2047: expansion operator from
1344 22. Failure to deliver a bounce message always caused it to be frozen, even if
1345 there was an errors_to setting on the router. The errors_to setting is now
1348 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1349 canonical form (fully expanded) before being placed in
1350 $sender_host_address.
1352 24. Updated eximstats to version 1.33
1354 25. Include certificate and key file names in error message when GnuTLS fails
1355 to set them up, because the GnuTLS error message doesn't include the name
1356 of the failing file when there is a problem reading it.
1358 26. Expand error message when OpenSSL has problems setting up cert/key files.
1361 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1362 (this can affect the format of dates).
1364 28. exim_tidydb, when checking for the continued existence of a message for
1365 which it has found a message-specific retry record, was not finding
1366 messages that were in split spool directories. Consequently, it was
1367 deleting retry records that should have stayed in existence.
1369 29. eximstats updated to version 1.35
1370 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1371 1.35 - bugfix such that pie charts by volume are generated correctly
1373 30. The SPA authentication driver was not abandoning authentication and moving
1374 on to the next authenticator when an expansion was forced to fail,
1375 contradicting the general specification for all authenticators. Instead it
1376 was generating a temporary error. It now behaves as specified.
1378 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1379 (the order specifies the preference for clients). The order is now AES256,
1380 AES128, 3DES, ARCFOUR128.
1382 31. Small patch to Sieve code - explicitly set From: when generating an
1385 32. Exim crashed if a remote delivery caused a very long error message to be
1386 recorded - for instance if somebody sent an entire SpamAssassin report back
1387 as a large number of 550 error lines. This bug was coincidentally fixed by
1388 increasing the size of one of Exim's internal buffers (big_buffer) that
1389 happened as part of the Exiscan merge. However, to be on the safe side, I
1390 have made the code more robust (and fixed the comments that describe what
1393 33. Some experimental protocols are using DNS PTR records for new purposes. The
1394 keys for these records are domain names, not reversed IP addresses. The
1395 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1396 leaves it alone. Component reversal etc. now happens only for IP addresses.
1399 34. The host_aton() function is supposed to be passed a string that is known
1400 to be a valid IP address. However, in the case of IPv6 addresses, it was
1401 not checking this. This is a hostage to fortune. Exim now panics and dies
1402 if the condition is not met. A case was found where this could be provoked
1403 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1404 components; fortuitously, this particular loophole had already been fixed
1405 by change 4.50/55 or 4.44/33 above.
1407 If there are any other similar loopholes, the new check in host_aton()
1408 itself should stop them being exploited. The report I received stated that
1409 data on the command line could provoke the exploit when Exim was running as
1410 exim, but did not say which command line option was involved. All I could
1411 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1412 running as the user.
1415 35. There was a buffer overflow vulnerability in the SPA authentication code
1416 (which came originally from the Samba project). I have added a test to the
1417 spa_base64_to_bits() function which I hope fixes it.
1420 36. The daemon start-up calls getloadavg() while still root for those OS that
1421 need the first call to be done as root, but it missed one case: when
1422 deliver_queue_load_max is set with deliver_drop_privilege. This is
1423 necessary for the benefit of the queue runner, because there is no re-exec
1424 when deliver_drop_privilege is set.
1426 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1427 was in use, was not putting the data itself into the right store pool;
1428 consequently, it could be overwritten for a subsequent message in the same
1429 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1432 38. Sometimes the final signoff response after QUIT could fail to get
1433 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1434 < 0 before doing a fflush(). This bug looks as though it goes back to the
1435 introduction of TLS in release 3.20, but "sometimes" must have been rare
1436 because the tests only now provoked it.
1442 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1443 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1444 Now it returns an integer. A number of calls were still expecting a T/F
1445 return. Fortuitously, in all cases, the tests worked in OK situations,
1446 which is the norm. However, things would have gone wrong on any write
1447 failures on the smtp file descriptor. This function is used when sending
1448 messages over SMTP and also when doing verify callouts.
1450 2. When Exim is called to do synchronous delivery of a locally submitted
1451 message (the -odf or -odi options), it no longer closes stderr before doing
1454 3. Implemented the mua_wrapper option.
1456 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1458 5. Implemented the functions header_remove(), header_testname(),
1459 header_add_at_position(), and receive_remove_recipient(), and exported them
1462 6. If an ACL "warn" statement specified the addition of headers, Exim already
1463 inserted X-ACL-Warn: at the start if there was no header name. However, it
1464 was not making this test for the second and subsequent header lines if
1465 there were newlines in the string. This meant that an invalid header could
1466 be inserted if Exim was badly configured.
1468 7. Allow an ACL "warn" statement to add header lines at the start or after all
1469 the Received: headers, as well as at the end.
1471 8. Added the rcpt_4xx retry error code.
1473 9. Added postmaster_mailfrom=xxx to callout verification option.
1475 10. Added mailfrom=xxxx to the callout verification option, for verify=
1478 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1479 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1481 12. Inserted some casts to stop certain compilers warning when using pointer
1482 differences as field lengths or precisions in printf-type calls (mostly
1483 affecting debugging statements).
1485 13. Added optional readline() support for -be (dynamically loaded).
1487 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1488 same clock tick as a message's arrival, so that its received time was the
1489 same as the "first fail" time on the retry record, and that message
1490 remained on the queue past the ultimate address timeout, every queue runner
1491 would try a delivery (because it was past the ultimate address timeout) but
1492 after another failure, the ultimate address timeout, which should have then
1493 bounced the address, did not kick in. This was a "< instead of <=" error;
1494 in most cases the first failure would have been in the next clock tick
1495 after the received time, and all would be well.
1497 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1498 being recognized when the domain list was tested by the match_domain
1499 condition in an expansion string.
1501 16. Added the ${str2b64: operator.
1503 17. Exim was always calling setrlimit() to set a large limit for the number of
1504 processes, without checking whether the existing limit was already
1505 adequate. (It did check for the limit on file descriptors.) Furthermore,
1506 errors from getrlimit() and setrlimit() were being ignored. Now they are
1507 logged to the main and panic logs, but Exim does carry on, to try to do its
1508 job under whatever limits there are.
1510 18. Imported PCRE 5.0.
1512 19. Trivial typo in log message " temporarily refused connection" (the leading
1515 20. If the log selector return_path_on_delivery was set and an address was
1516 redirected to /dev/null, the delivery process crashed because it assumed
1517 that a return path would always be set for a "successful" delivery. In this
1518 case, the whole delivery is bypassed as an optimization, and therefore no
1521 21. Internal re-arrangement: the function for sending a challenge and reading
1522 a response while authentication was assuming a zero-terminated challenge
1523 string. It's now changed to take a pointer and a length, to allow for
1524 binary data in such strings.
1526 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1528 23. Exim was not respecting finduser_retries when seeking the login of the
1529 uid under which it was called; it was always trying 10 times. (The default
1530 setting of finduser_retries is zero.) Also, it was sleeping after the final
1531 failure, which is pointless.
1533 24. Implemented tls_on_connect_ports.
1535 25. Implemented acl_smtp_predata.
1537 26. If the domain in control=submission is set empty, Exim assumes that the
1538 authenticated id is a complete email address when it generates From: or
1539 Sender: header lines.
1541 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1542 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1543 chown and chgrp in /bin and hostname in /usr/bin.
1545 28. Exim was keeping the "process log" file open after each use, just as it
1546 does for the main log. This opens the possibility of it remaining open for
1547 long periods when the USR1 signal hits a daemon. Occasional processlog
1548 errors were reported, that could have been caused by this. Anyway, it seems
1549 much more sensible not to leave this file open at all, so that is what now
1552 29. The long-running daemon process does not normally write to the log once it
1553 has entered its main loop, and it closes the log before doing so. This is
1554 so that log files can straightforwardly be renamed and moved. However,
1555 there are a couple of unusual error situations where the daemon does write
1556 log entries, and I had neglected to close the log afterwards.
1558 30. The text of an SMTP error response that was received during a remote
1559 delivery was being truncated at 512 bytes. This is too short for some of
1560 the long messages that one sometimes sees. I've increased the limit to
1563 31. It is now possible to make retry rules that apply only when a message has a
1564 specific sender, in particular, an empty sender.
1566 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1567 it possible to be selective about when SMTP synchronization is enforced.
1569 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1571 32. Implemented hosts_connection_nolog.
1573 33. Added an ACL for QUIT.
1575 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1578 35. Added mailbox_size and mailbox_filecount to appendfile.
1580 36. Added control = no_multiline_responses to ACLs.
1582 37. There was a bug in the logic of the code that waits for the clock to tick
1583 in the case where the clock went backwards by a substantial amount such
1584 that the microsecond fraction of "now" was more than the microsecond
1585 fraction of "then" (but the whole seconds number was less).
1587 38. Added support for the libradius Radius client library this is found on
1588 FreeBSD (previously only the radiusclient library was supported).
1594 1. When certain lookups returned multiple values in the form name=value, the
1595 quoting of the values was not always being done properly. Specifically:
1596 (a) If the value started with a double quote, but contained no whitespace,
1598 (b) If the value contained whitespace other than a space character (i.e.
1599 tabs or newlines or carriage returns) it was not quoted.
1600 This fix has been applied to the mysql and pgsql lookups by writing a
1601 separate quoting function and calling it from the lookup code. The fix
1602 should probably also be applied to nisplus, ibase and oracle lookups, but
1603 since I cannot test any of those, I have not disturbed their existing code.
1605 2. A hit in the callout cache for a specific address caused a log line with no
1606 reason for rejecting RCPT. Now it says "Previous (cached) callout
1607 verification failure".
1609 3. There was an off-by-one bug in the queryprogram router. An over-long
1610 return line was truncated at 256 instead of 255 characters, thereby
1611 overflowing its buffer with the terminating zero. As well as fixing this, I
1612 have increased the buffer size to 1024 (and made a note to document this).
1614 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1615 when Exim is waiting for an SMTP response from a remote server, Exim
1616 restarts its select() call on the socket, thereby resetting its timeout.
1617 This is not a problem when such interrupts are rare. Somebody set up a cron
1618 job to run exiwhat every 2 minutes, which is less than the normal select()
1619 timeout (5 or 10 minutes). This meant that the select() timeout never
1620 kicked in because it was always reset. I have fixed this by comparing the
1621 time when an interrupt arrives with the time at the start of the first call
1622 to select(). If more time than the timeout has elapsed, the interrupt is
1623 treated as a timeout.
1625 5. Some internal re-factoring in preparation for the addition of Sieve
1626 extensions (by MH). In particular, the "personal" test is moved to a
1627 separate function, and given an option for scanning Cc: and Bcc: (which is
1628 not set for Exim filters).
1630 6. When Exim created an email address using the login of the caller as the
1631 local part (e.g. when creating a From: or Sender: header line), it was not
1632 quoting the local part when it contained special characters such as @.
1634 7. Installed new OpenBSD configuration files.
1636 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1637 try to make them clearer.
1639 9. Callout options, other than the timeout value, were being ignored when
1640 verifying sender addresses in header lines. For example, when using
1642 verify = header_sender/callout=no_cache
1644 the cache was (incorrectly) being used.
1646 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1647 only the Cygwin environment.
1649 11. When return_path_on_delivery was set as a log selector, if different remote
1650 addresses in the same message used different return paths and parallel
1651 remote delivery occurred, the wrong values would sometimes be logged.
1652 (Whenever a remote delivery process finished, the return path value from
1653 the most recently started remote delivery process was logged.)
1655 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1656 lines when AUTH and/or TLS are in use. This is the "received protocol"
1657 field. Exim used to use "asmtp" for authenticated SMTP, without any
1658 indication (in the protocol name) for TLS use. Now it follows the RFC and
1659 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1660 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1661 names appear in log lines as well as in Received: header lines.
1663 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1664 extensions, and comparison tests, and to fix some bugs.
1666 14. Changes to the "personal" filter test:
1668 (1) The test was buggy in that it was just doing the equivalent of
1669 "contains" tests on header lines. For example, if a user's address was
1670 anne@some.where, the "personal" test would incorrectly be true for
1672 To: susanne@some.where
1674 This test is now done by extracting each address from the header in turn,
1675 and checking the entire address. Other tests that are part of "personal"
1676 are now done using regular expressions (for example, to check local parts
1677 of addresses in From: header lines).
1679 (2) The list of non-personal local parts in From: addresses has been
1680 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1681 taken from the Sieve specification recommendations.
1683 (3) If the message contains any header line starting with "List-" it is
1684 treated as non-personal.
1686 (4) The test for "circular" in the Subject: header line has been removed
1687 because it now seems ill-conceived.
1689 15. Minor typos in src/EDITME comments corrected.
1691 16. Installed latest exipick from John Jetmore.
1693 17. If headers_add on a router specified a text string that was too long for
1694 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1695 of string_sprintf() is now avoided.
1697 18. $message_body_size was not set (it was always zero) when running the DATA
1698 ACL and the local_scan() function.
1700 19. For the "mail" command in an Exim filter, no default was being set for
1701 the once_repeat time, causing a random time value to be used if "once" was
1702 specified. (If the value happened to be <= 0, no repeat happened.) The
1703 default is now 0s, meaning "never repeat". The "vacation" command was OK
1704 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1705 (I found it when inspecting the code).
1707 20. There is now an overall timeout for performing a callout verification. It
1708 defaults to 4 times the callout timeout, which applies to individual SMTP
1709 commands during the callout. The overall timeout applies when there is more
1710 than one host that can be tried. The timeout is checked before trying the
1711 next host. This prevents very long delays if there are a large number of
1712 hosts and all are timing out (e.g. when the network connections are timing
1713 out). The value of the overall timeout can be changed by specifying an
1714 additional sub-option for "callout", called "maxwait". For example:
1716 verify = sender/callout=5s,maxwait=20s
1718 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1719 to the end before writing, but this should make it even safer).
1721 22. Exim was forgetting that it had advertised PIPELINING for the second and
1722 subsequent messages on an SMTP connection. It was also not resetting its
1723 memory on STARTTLS and an internal HELO.
1725 23. When Exim logs an SMTP synchronization error within a session, it now
1726 records whether PIPELINING has been advertised or not.
1728 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1729 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1730 rather than long int.
1732 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1734 26. Added the never_mail option to autoreply.
1740 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1741 crash if the getsockname() call failed; this can happen if a connection is
1742 closed very soon after it is established. The problem was simply in the
1743 order in which certain operations were done, causing Exim to try to write
1744 to the SMTP stream before it had set up the file descriptor. The bug has
1745 been fixed by making things happen in the correct order.
1751 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1752 before the connection was closed, thus losing the rejection response.
1754 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1755 some early Solaris releases, but causes trouble in current releases where
1756 socklen_t is defined.
1758 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1761 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1764 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1765 that releasing the top of it at the end releases what was used for sub-
1766 expansions (unless the block got too big). However, discard this block if
1767 the first thing is a variable or header, so that we can use its block when
1768 it is dynamic (useful for very large $message_headers, for example).
1770 6. Lookups now cache *every* query, not just the most recent. A new, separate
1771 store pool is used for this. It can be recovered when all lookup caches are
1772 flushed. Lookups now release memory at the end of their result strings.
1773 This has involved some general refactoring of the lookup sources.
1775 7. Some code has been added to the store_xxx() functions to reduce the amount
1776 of flapping under certain conditions.
1778 8. log_incoming_interface used to affect only the <= reception log lines. Now
1779 it causes the local interface and port to be added to several more SMTP log
1780 lines, for example "SMTP connection from", and rejection lines.
1782 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1784 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1786 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1787 could be overwritten at the end of the current message (or the start of a
1788 new message if it was set in a HELO ACL). The value is now preserved for
1789 the duration of the SMTP connection.
1791 12. If a transport had a headers_rewrite setting, and a matching header line
1792 contained an unqualified address, that address was qualified, even if it
1793 did not match any rewriting rules. The underlying bug was that the values
1794 of the flags that permit the existence of unqualified sender and recipient
1795 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1796 non-local messages, and by -bnq for local messages) were not being
1797 preserved with the message after it was received.
1799 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1800 "next input=" as part of the text comprising the host identity instead of
1801 the correct text. The code was using the same buffer for two different
1802 strings. However, depending on which order the printing function evaluated
1803 its arguments, the bug did not always show up. Under Linux, for example, my
1804 test suite worked just fine.
1806 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1807 doesn't work with some older versions of Perl. It has been changed to "my",
1808 which in any case is probably the better facility to use.
1810 15. A really picky compiler found some instances of statements for creating
1811 error messages that either had too many or two few arguments for the format
1814 16. The size of the buffer for calls to the DNS resolver has been increased
1815 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1816 for addresses that have a lot of PTR records. This alleviates a problem; it
1817 does not fully solve it.
1819 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1820 buffer now truncates the list and logs the incident, which is the same
1821 action as happens when Exim is looking up a host name and its aliases.
1822 Previously in this situation something unpredictable would happen;
1823 sometimes it was "internal error: store_reset failed".
1825 18. If a server dropped the connection unexpectedly when an Exim client was
1826 using GnuTLS and trying to read a response, the client delivery process
1827 crashed while trying to generate an error log message.
1829 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1830 string, for example:
1832 warn message = H1: something\nH2: something
1834 the text was added as a single header line from Exim's point of view
1835 though it ended up OK in the delivered message. However, searching for the
1836 second and subsequent header lines using $h_h2: did not work. This has been
1837 fixed. Similarly, if a system filter added multiple headers in this way,
1838 the routers could not see them.
1840 20. Expanded the error message when iplsearch is called with an invalid key to
1841 suggest using net-iplsearch in a host list.
1843 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1844 ACLs are no longer actually imposed (and a message to that effect is
1847 22. If a "gecos" field in a passwd entry contained escaped characters, in
1848 particular, if it contained a \" sequence, Exim got it wrong when building
1849 a From: or a Sender: header from that name. A second bug also caused
1850 incorrect handling when an unquoted " was present following a character
1851 that needed quoting.
1853 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1854 was not being matched caselessly.
1856 24. Arranged for all hyphens in the exim.8 source to be escaped with
1859 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1860 properly. Recipient callout cache records were still being keyed to include
1861 the sender, even when use_sender was set false. This led to far more
1862 callouts that were necessary. The sender is no longer included in the key
1863 when use_sender is false.
1865 26. Added "control = submission" modifier to ACLs.
1867 27. Added the ${base62d: operator to decode base 62 numbers.
1869 28. dnsdb lookups can now access SRV records.
1871 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1872 the configuration file.
1874 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1875 (-v) mode. This makes the output for a verbose queue run more intelligible.
1877 31. Added a use_postmaster feature to recipient callouts.
1879 32. Added the $body_zerocount variable, containing the number of binary zero
1880 bytes in the message body.
1882 33. The time of last modification of the "new" subdirectory is now used as the
1883 "mailbox time last read" when there is a quota error for a maildir
1886 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1888 35. Added +ignore_unknown as a special item in host lists.
1890 36. Code for decoding IPv6 addresses in host lists is now included, even if
1891 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1892 address was recognized as an IP address, but was then not correctly decoded
1893 into binary, causing unexpected and incorrect effects when compared with
1900 1. Very minor rewording of debugging text in manualroute to say "list of
1901 hosts" instead of "hostlist".
1903 2. If verify=header_syntax was set, and a header line with an unqualified
1904 address (no domain) and a large number of spaces between the end of the
1905 name and the colon was received, the reception process suffered a buffer
1906 overflow, and (when I tested it) crashed. This was caused by some obsolete
1907 code that should have been removed. The fix is to remove it!
1909 3. When running in the test harness, delay a bit after writing a bounce
1910 message to get a bit more predictability in the log output.
1912 4. Added a call to search_tidyup() just before forking a reception process. In
1913 theory, someone could use a lookup in the expansion of smtp_accept_max_
1914 per_host which, without the tidyup, could leave open a database connection.
1916 5. Added the variables $recipient_data and $sender_data which get set from a
1917 lookup success in an ACL "recipients" or "senders" condition, or a router
1918 "senders" option, similar to $domain_data and $local_part_data.
1920 6. Moved the writing of debug_print from before to after the "senders" test
1923 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1924 problems for message scanning, either using a data ACL, or using
1925 local_scan() because the Received: header was not generated till after they
1926 were called (in order to set the time as the time of reception completion).
1927 I have revised the way this works. The header is now generated after the
1928 body is received, but before the ACL or local_scan() are called. After they
1929 are run, the timestamp in the header is updated.
1935 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1936 before starting a queue runner without re-exec. This happened only when
1937 deliver_drop_privilege was set or when the Exim user was set to root. The
1938 effect of the bug was that timeouts during subsequent deliveries caused
1939 crashes instead of being properly handled. The handler is now left at its
1940 default (and expected) setting.
1942 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1943 message, again when deliver_drop_privilege is set or Exim is run as root.
1944 The bug described in (1) was not present in this case, but the tidying up
1945 of the other signals was missing. I have made the two cases consistent.
1947 3. The ignore_target_hosts setting on a manualroute router was being ignored
1948 for hosts that were looked up using the /MX notation.
1950 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1953 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1954 operated on the sender address. After changing the $sender_address to <>
1955 for the sender address verify, Exim was re-instated it as the original
1956 (before rewriting) address, but remembering that it had rewritten it, so it
1957 wasn't rewriting it again. This bug also had the effect of breaking the
1958 sender address verification caching when the sender address was rewritten.
1960 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1961 This has been changed so that if the ip literal address matches
1962 ignore_target_hosts, the router declines.
1964 7. Added expansion conditions match_domain, match_address, and match_local_
1965 part (NOT match_host).
1967 8. The placeholder for the Received: header didn't have a length field set.
1969 9. Added code to Exim itself and to exim_lock to test for a specific race
1970 condition that could lead to file corruption when using MBX delivery. The
1971 issue is with the lockfile that is created in /tmp. If this file is removed
1972 after a process has opened it but before that process has acquired a lock,
1973 there is the potential for a second process to recreate the file and also
1974 acquire a lock. This could lead to two Exim processes writing to the file
1975 at the same time. The added code performs the same test as UW imapd; it
1976 checks after acquiring the lock that its file descriptor still refers to
1977 the same named file.
1979 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1980 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1983 11. Added the smtp_active_hostname option. If used, this will typically be made
1984 to depend on the incoming interface address. Because $interface_address is
1985 not set up until the daemon has forked a reception process, error responses
1986 that can happen earlier (such as "too many connections") no longer contain
1989 12. If an expansion in a condition on a "warn" statement fails because a lookup
1990 defers, the "warn" statement is abandoned, and the next ACL statement is
1991 processed. Previously this caused the whole ACL to be aborted.
1993 13. Added the iplsearch lookup type.
1995 14. Added ident_timeout as a log selector.
1997 15. Added tls_certificate_verified as a log selector.
1999 16. Added a global option tls_require_ciphers (compare the smtp transport
2000 option of the same name). This controls incoming TLS connections.
2002 17. I finally figured out how to make tls_require_ciphers do a similar thing
2003 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2004 before starting the TLS session.
2006 18. Tabs are now shown as \t in -bP output.
2008 19. If the log selector return_path_on_delivery was set, Exim crashed when
2009 bouncing a message because it had too many Received: header lines.
2011 20. If two routers both had headers_remove settings, and the first one included
2012 a superfluous trailing colon, the final name in the first list and the
2013 first name in the second list were incorrectly joined into one item (with a
2014 colon in the middle).
2020 1. Added -C and -D options to the exinext utility, mainly to make it easier
2021 to include in the automated testing, but these could be helpful when
2022 multiple configurations are in use.
2024 2. The exinext utility was not formatting the output nicely when there was
2025 an alternate port involved in the retry record key, nor when there was a
2026 message id as well (for retries that were specific to a specific message
2027 and a specific host). It was also confused by IPv6 addresses, because of
2028 the additional colons they contain. I have fixed the IPv4 problem, and
2029 patched it up to do a reasonable job for IPv6.
2031 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2032 delivery, the log line now contains "pipelined" if PIPELINING was used.
2034 4. An SMTP transport process used to panic and die if the bind() call to set
2035 an explicit outgoing interface failed. This has been changed; it is now
2036 treated in the same way as a connect() failure.
2038 5. A reference to $sender_host_name in the part of a conditional expansion
2039 that was being skipped was still causing a DNS lookup. This no longer
2042 6. The def: expansion condition was not recognizing references to header lines
2043 that used bh_ and bheader_.
2045 7. Added the _cache feature to named lists.
2047 8. The code for checking quota_filecount in the appendfile transport was
2048 allowing one more file than it should have been.
2050 9. For compatibility with Sendmail, the command line option
2058 and sets the incoming protocol and host name (for trusted callers). The
2059 host name and its colon can be omitted when only the protocol is to be set.
2060 Note the Exim already has two private options, -pd and -ps, that refer to
2061 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2062 "s", but I don't think that's a major issue.
2064 10. A number of refactoring changes to the code, none of which should affect
2067 (a) The number of logging options was getting close to filling up the
2068 32-bit word that was used as a bit map. I have split them into two classes:
2069 those that are passed in the argument to log_write(), and those that are
2070 only ever tested independently outside of that function. These are now in
2071 separate 32-bit words, so there is plenty of room for expansion again.
2072 There is no change in the user interface or the logging behaviour.
2074 (b) When building, for example, log lines, the code previously used a
2075 macro that called string_cat() twice, in order to add two strings. This is
2076 not really sufficiently general. Furthermore, there was one instance where
2077 it was actually wrong because one of the argument was used twice, and in
2078 one call a function was used. (As it happened, calling the function twice
2079 did not affect the overall behaviour.) The macro has been replaced by a
2080 function that can join an arbitrary number of extra strings onto a growing
2083 (c) The code for expansion conditions now uses a table and a binary chop
2084 instead of a serial search (which was left over from when there were very
2085 few conditions). Also, it now recognizes conditions like "pam" even when
2086 the relevant support is not compiled in: a suitably worded error message is
2087 given if an attempt is made to use such a condition.
2089 11. Added ${time_interval:xxxxx}.
2091 12. A bug was causing one of the ddress fields not to be passed back correctly
2092 from remote delivery subprocesses. The field in question was not being
2093 subsequently used, so this caused to problems in practice.
2095 13. Added new log selectors queue_time and deliver_time.
2097 14. Might have fixed a bug in maildirsizefile handling that threw up
2098 "unexpected character" debug warnings, and recalculated the data
2099 unnecessarily. In any case, I expanded the warning message to give more
2102 15. Added the message "Restricted characters in address" to the statements in
2103 the default ACL that block characters like @ and % in local parts.
2105 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2106 Three changes have been made:
2108 (a) There was a serious bug; a negative response to MAIL caused the whole
2109 recipient domain to be cached as invalid, thereby blocking all messages
2110 to all local parts at the same domain, from all senders. This bug has
2111 been fixed. The domain is no longer cached after a negative response to
2112 MAIL if the sender used is not empty.
2114 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2117 (c) A new callout option, "use_sender" has been added for people who want
2118 the modified behaviour.
2124 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2127 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2128 indeed breaks things for older releases.
2130 3. Added additional logging to the case where there is a problem reading data
2131 from a filter that is running in a subprocess using a pipe, in order to
2132 try to track down a specific problem.
2134 4. Testing facility fudge: when running in the test harness and attempting
2135 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2136 getting "No route to host". Convert this to a timeout.
2138 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2141 6. Some OS don't have socklen_t but use size_t instead. This affects the
2142 fifth argument of getsockopt() amongst other things. This is now
2143 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2144 can be set for individual OS. I have set it for SunOS5, OSF1, and
2145 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2146 some earlier ones do not.
2148 7. Change 4.30/15 was not doing the test caselessly.
2150 8. The standard form for an IPv6 address literal was being rejected by address
2151 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2152 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2153 this, as well as the form without the "IPv6" on the front (but only when
2154 address literals are enabled, of course).
2156 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2158 10. Exim crashed if a message with an empty sender address specified by -f
2159 encountered a router with an errors_to setting. This could be provoked only
2160 by a command such as
2164 where an empty string was supplied; "<>" did not hit this bug.
2166 11. Installed PCRE release 4.5.
2168 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2169 remained set. It is now erased.
2171 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2172 times from message ids (which are base 36 rather than the normal 62).
2174 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2175 were being counted as actual protocol errors, and logged if the log
2176 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2177 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2178 and DATA following a set of rejected RCPTs do not count as protocol errors.
2179 In other words, Exim assumes they were pipelined, though this may not
2180 actually be the case. Of course, in all cases the client gets an
2181 appropriate error code.
2183 15. If a lookup fails in an ACL condition, a message about the failure may
2184 be available; it is used if testing the ACL cannot continue, because most
2185 such messages specify what the cause of the deferral is. However, some
2186 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2187 that caused an old message to be retained and used if a later statement
2188 caused a defer, replacing the real cause of the deferral.
2190 16. If an IP address had so many PTR records that the DNS lookup buffer
2191 was not large enough to hold them, Exim could crash while trying to process
2192 the truncated data. It now detects and logs this case.
2194 17. Further to 4.21/58, another change has been made: if (and only if) the
2195 first line of a message (the first header line) ends with CRLF, a bare LF
2196 in a subsequent header line has a space inserted after it, so as not to
2197 terminate the header.
2199 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2200 unnecessarily, used atoi() instead of strtol(), and didn't check the
2201 termination when getting file sizes from file names by regex.
2203 19. Completely re-implemented the support for maildirsize files, in the light
2204 of a number of problems with the previous contributed implementation
2205 (4.30/29). In particular:
2207 . If the quota is zero, the maildirsize file is maintained, but no quota is
2210 . If the maildir directory does not exist, it is created before any attempt
2211 to write a maildirsize file.
2213 . The quota value in the file is just a cache; if the quota is changed in
2214 the transport, the new value overrides.
2216 . A regular expression is available for excluding directories from the
2219 20. The autoreply transport checks the characters in options that define the
2220 message's headers; it allows continued headers, but it was checking with
2221 isspace() after an embedded newline instead of explicitly looking for a
2224 21. If all the "regular" hosts to which an address was routed had passed their
2225 expiry times, and had not reached their retry times, the address was
2226 bounced, even if fallback hosts were defined. Now Exim should go on to try
2229 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2230 equivalent code in the SMTP transport. Some hosts send humungous responses
2231 to HELO/EHLO, more than 1024 it seems.
2233 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2234 gives compiler warnings in some environments. I've now done it "properly",
2237 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2238 (because of problems with the built-in one) was declared to return uschar *
2239 instead of char *, causing compiler failure.
2241 25. Fixed a file descriptor leak when processing alias/forward files.
2243 26. Fixed a minor format string issue in dbfn.c.
2245 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2247 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2248 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2251 29. When a sender address is verified, it is cached, to save repeating the test
2252 when there is more than one recipient in a message. However, when the
2253 verification involves a callout, it is possible for different callout
2254 options to be set for different recipients. It is too complicated to keep
2255 track of this in the cache, so now Exim always runs a verification when a
2256 callout is required, relying on the callout cache for the optimization.
2257 The overhead is duplication of the address routing, but this should not be
2260 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2261 to be verified with callout=postmaster, and the main callout worked but the
2262 postmaster check failed, the verification correctly failed. However, if a
2263 subsequent RCPT command asked for sender verification *without* the
2264 postmaster check, incorrect caching caused this verification also to fail,
2267 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2268 it was not caching the DNS options (qualify_single, search_parents) that
2269 were used when the lookup failed. A subsequent lookup with different
2270 options therefore always gave the same answer, though there were cases
2271 where it should not have. (Example: a "domains = !$mx_any" option on a
2272 dnslookup router: the "domains" option is always processed without any
2273 widening, but the router might have qualify_single set.) Now Exim uses the
2274 cached value only when the same options are set.
2276 32. Added John Jetmore's "exipick" utility to the distribution.
2278 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2279 than a timeout (e.g. a certificate is required, and is not provided), an
2280 Exim server now closes the connection immediately. Previously it waited for
2281 the client to close - but if the client is SSL, it seems that they each
2282 wait for each other, leading to a delay before one of them times out.
2284 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2285 maintained 0.8.x compatibility because I don't think many are using it, and
2286 it is clearly obsolete.
2288 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2291 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2292 client certificate was expired. A simple patch fixes this, though I don't
2293 understand the full logic of why the verify callback is called multiple
2296 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2297 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2298 which causes problems with some clients (such as the Certicom SSL Plus
2299 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2300 disables the coutermeasure allowing Eudora to connect."
2302 38. Exim was not checking that a write() to a log file succeeded. This could
2303 lead to Bad Things if a log got too big, in particular if it hit a file
2304 size limit. Exim now panics and dies if it cannot write to a log file, just
2305 as it does if it cannot open a log file.
2307 39. Modified OS/Makefile-Linux so that it now contains
2309 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2311 The two -D definitions ensure that Exim is compiled with large file
2312 support, which makes it possible to handle log files that are bigger than
2315 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2316 instance) a domain was checked against a named list that involved a lookup,
2317 causing $domain_data to be set, then another domain was checked against the
2318 same list, then the first domain was re-checked, the value of $domain_data
2319 after the final check could be wrong. In particular, if the second check
2320 failed, it could be set empty. This bug probably also applied to
2323 41. The strip_trailing_dot option was not being applied to the address given
2324 with the -f command-line option.
2326 42. The code for reading a message's header from the spool was incrementing
2327 $received_count, but never initializing it. This meant that the value was
2328 incorrect (doubled) while delivering a message in the same process in which
2329 it was received. In the most common configuration of Exim, this never
2330 happens - a fresh exec is done - but it can happen when
2331 deliver_drop_privilege is set.
2333 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2334 it now includes up to 150 characters of the unexpected data in the log
2337 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2338 and building data strings. The size of both of these buffers was 10 000
2339 bytes - far larger than anybody would *ever* want, thought I. Needless to
2340 say, somebody hit the limit. I have increased the maximum line length to
2341 20 000 and the maximum data length of concatenated lines to 100 000. I have
2342 also fixed two bugs, because there was no checking on these buffers. Tsk,
2343 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2344 buffer is too small.
2346 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2347 lsearch lookups. Now it does.
2349 46. When parsing a route_list item in a manualroute router, a fixed-length
2350 buffer was used for the list of hosts. I made this 1024 bytes long,
2351 thinking that nobody would ever have a list of hosts that long. Wrong.
2352 Somebody had a whole pile of complicated expansion conditions, and the
2353 string was silently truncated, leading to an expansion error. It turns out
2354 that it is easier to change to an unlimited length (owing to other changes
2355 that have happened since this code was originally written) than to build
2356 structure for giving a limitation error. The length of the item that
2357 expands into the list of hosts is now unlimited.
2359 47. The lsearch lookup could not handle data where the length of text line was
2360 more than 4095 characters. Such lines were truncated, leading to shortened
2361 data being returned. It should now handle lines of any length.
2363 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2364 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2367 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2368 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2369 no longer happens in comment lines. A list of replacements is now placed
2370 at the head of all of the source files, except those whose only change is
2371 to replace PERL_COMMAND in the very first #! line.
2373 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2374 messages on the queue, with a bottom-up merge sort, using code contributed
2375 by Michael Haardt. This should make operations like -bp somewhat faster on
2376 large queues. It won't affect queue runners, except when queue_run_in_order
2379 51. Installed eximstats 1.31 in the distribution.
2381 52. Added support for SRV lookups to the dnslookup router.
2383 53. If an ACL referred to $message_body or $message_body_end, the value was not
2384 reset for any messages that followed in the same SMTP session.
2386 54. The store-handling optimization for building very long strings was not
2387 differentiating between the different store pools. I don't think this
2388 actually made any difference in practice, but I've tidied it.
2390 55. While running the routers to verify a sender address, $sender_address
2391 was still set to the sender address. This is wrong, because when routing to
2392 send a bounce to the sender, it would be empty. Therefore, I have changed
2393 it so that, while verifying a sender address, $sender_address is set to <>.
2394 (There is no change to what happens when verifying a recipient address.)
2396 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2397 target A or AAAA records (if not already returned) without resetting the
2398 qualify_single or search_parents options of the DNS resolver. These are
2399 inappropriate in this case because the targets of MX and SRV records must
2400 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2401 target that, when qualified, matched something in the local domain. These
2402 two options are now turned off when doing these lookups.
2404 57. It seems that at least some releases of Reiserfs (which does not have the
2405 concept of a fixed number of inodes) returns zero and not -1 for the
2406 number of available inodes. This interacted badly with check_spool_inodes,
2407 which assumed that -1 was the "no such thing" setting. What I have done is
2408 to check that the total number of inodes is greater than zero before doing
2409 the test of how many are available.
2411 58. When a "warn" ACL statement has a log_message modifier, the message is
2412 remembered, and not repeated. This is to avoid a lot of repetition when a
2413 message has many recipients that cause the same warning to be written.
2414 Howewer, Exim was preserving the list of already written lines for an
2415 entire SMTP session, which doesn't seem right. The memory is now reset if a
2416 new message is started.
2418 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2419 debugging output unless log_rewrite was also set.
2421 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2422 of (int)(handle) when we know that handle contains (void *)(-1).
2424 61. The Exim daemon panic-logs an error return when it closes the incoming
2425 connection. However "connection reset by peer" seems to be common, and
2426 isn't really an error worthy of noting specially, so that particular error
2429 62. When Exim is trying to find all the local interfaces, it used to panic and
2430 die if the ioctl to get the interface flags failed. However, it seems that
2431 on at least one OS (Solaris 9) it is possible to have an interface that is
2432 included in the list of interfaces, but for which you get a failure error
2433 for this call. This happens when the interface is not "plumbed" into a
2434 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2435 failure of the "get flags" call assumes that the interface is down.
2437 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2438 makes life easier for people who are doing arithmetic on fields extracted
2439 from dates, where you often get leading zeros that should not be
2440 interpreted as octal.
2442 64. Added qualify_domain to the redirect router, to override the global
2445 65. If a pathologically long header line contained very many addresses (the
2446 report of this problem mentioned 10 000) and each of them was rewritten,
2447 Exim could use up a very large amount of memory. (It kept on making new
2448 copies of the header line as it rewrote, and never released the old ones.)
2449 At the expense of a bit more processing, the header rewriting function has
2450 been changed so that it no longer eats memory in this way.
2452 66. The generation of the Received: header has been moved from the time that a
2453 message starts to be received, to the time that it finishes. The timestamp
2454 in the Received: header should now be very close to that of the <= log
2455 line. There are two side-effects of this change:
2457 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2458 logged header lines no longer include the local Received: line, because
2459 it has not yet been created. The same applies to a copy of the message
2460 that is returned to a non-SMTP sender when a message is rejected.
2462 (b) When a filter file is tested using -bf, no additional Received: header
2463 is added to the test message. After some thought, I decided that this
2466 This change does not affect the value of $received_for. It is still set
2467 after address rewriting, but before local_scan() is called.
2469 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2471 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2472 gave an unhelpful panic error message, and a defer error. I have managed to
2473 change this behaviour so that it now rejects any supplied certificate,
2474 which seems right, as the list of acceptable certificates is empty.
2476 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2477 gave an unhelpful defer error. I have not managed to make this reject any
2478 supplied certificates, but the error message it gives is "no certificate
2479 supplied", which is not helpful.
2481 70. exigrep's output now also includes lines that are not associated with any
2482 message, but which match the given pattern. Implemented by a patch from
2483 Martin Sluka, which also tidied up the Perl a bit.
2485 71. Recipient callout verification, like sender verification, was using <> in
2486 the MAIL FROM command. This isn't really the right thing, since the actual
2487 sender may affect whether the remote host accepts the recipient or not. I
2488 have changed it to use the actual sender in the callout; this means that
2489 the cache record is now keyed on a recipient/sender pair, not just the
2490 recipient address. There doesn't seem to be a real danger of callout loops,
2491 since a callout by the remote host to check the sender would use <>.
2492 [SEE ABOVE: changed after hitting problems.]
2494 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2495 temporary errors. However, in the case of such a code being given after
2496 the end of a data transmission (i.e. after ".") Exim was failing to write
2497 a retry record for the message. (Yes, there was some broken host that was
2498 actually sending 8xx at this point.)
2500 73. An unknown lookup type in a host list could cause Exim to panic-die when
2501 the list was checked. (An example that provoked this was putting <; in the
2502 middle of a list instead of at the start.) If this happened during a DATA
2503 ACL check, a -D file could be left lying around. This kind of configuration
2504 error no longer causes Exim to die; instead it causes a defer errror. The
2505 incident is still logged to the main and panic logs.
2507 74. Buglet left over from Exim 3 conversion. The message "too many messages
2508 in one connection" was written to the rejectlog but not the mainlog, except
2509 when address rewriting (yes!) was being logged.
2511 75. Added write_rejectlog option.
2513 76. When a system filter was run not as root (that is, when system_filter_user
2514 was set), the values of the $n variables were not being returned to the
2515 main process; thus, they were not subsequently available in the $sn
2518 77. Added +return_path_on_delivery log selector.
2520 78. A connection timeout was being treated differently from recipients deferred
2521 when testing hosts_max_try with a message that was older than the host's
2522 retry timeout. (The host should not be counted, thus allowing all hosts to
2523 be tried at least once before bouncing.) This may have been the cause of an
2524 occasionally reported bug whereby a message would remain on the queue
2525 longer than the retry timeout, but would be bounced if a delivery was
2526 forced. I say "may" because I never totally pinned down the problem;
2527 setting up timeout/retry tests is difficult. See also the next item.
2529 79. The ultimate address timeout was not being applied to errors that involved
2530 a combination of host plus message (for example, a timeout on a MAIL
2531 command). When an address resolved to a number of possible hosts, and they
2532 were not all tried for each delivery (e.g. because of hosts_max_try), a
2533 message could remain on the queue longer than the retry timeout.
2535 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2538 81. Fixed an obscure SMTP outgoing bug which required at least the following
2539 conditions: (a) there was another message waiting for the same server;
2540 (b) the server returned 5xx to all RCPT commands in the first message so
2541 that the message was not completed; (c) the server dropped the connection
2542 or gave a negative response to the RSET that Exim sends to abort the
2543 transaction. The observed case was a dropped connection after DATA that had
2544 been sent in pipelining mode. That is, the server had advertised PIPELINING
2545 but was not implementing it correctly. The effect of the bug was incorrect
2546 behaviour, such as trying another host, and this could lead to a crash.
2552 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2553 and daemon.c were passed as pointers to ints; they should have been
2554 pointers to socklen_t variables (which are typically unsigned ints).
2556 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2559 3. Fixed a really odd bug that affected only the testing scheme; patching a
2560 certain fixed string in the binary changed the value of another string that
2561 happened to be identical to the end of the original first string.
2563 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2564 name", it returns that address as the IP address. On some operating
2565 systems (e.g. Solaris), it also passes back the IP address string as the
2566 "host name". However, on others (e.g. Linux), it passes back an empty
2567 string. Exim wasn't checking for this, and was changing the host name to an
2568 empty string, assuming it had been canonicized.
2570 5. Although rare, it is permitted to have more than one PTR record for a given
2571 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2572 all the names associated with an address, because they do in Solaris.
2573 However, it seems that they do not in Linux for data that comes from the
2574 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2575 I found this out when I moved to a new Linux workstation and tried to run
2576 the Exim test suite.
2578 To get round this problem I have changed the code so that it now does its
2579 own call to the DNS to look up PTR records when searching for a host name.
2580 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2581 addresses that are only in /etc/hosts are still found.
2583 This behaviour is, however, controlled by an option called host_lookup_
2584 order, which defaults to "bydns:byaddr". If people want to use the other
2585 order, or indeed, just use one or the other means of lookup, they can
2586 specify it in this variable.
2588 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2589 some operating systems, this comes back from gethostbyaddr() as an empty
2590 string, and this is what Exim used to test for. However, it seems that in
2591 other systems, "." is yielded. Exim now tests for this case too.
2593 7. The values of check_spool_space and check_log_space are now held internally
2594 as a number of kilobytes instead of an absolute number of bytes. If a
2595 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2596 kilobyte. This means that much larger values can be stored.
2598 8. Exim monitor: an attempt to get the action menu when not actually pointing
2599 at a message produces an empty menu entitled "No message selected". This
2600 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2601 no entries in it ("Shell widget menu has zero width and/or height"). So I
2602 have added a single, blank menu entry in this case.
2604 9. Added ${quote_local_part.
2606 10. MIME decoding is now applied to the contents of Subject: header lines when
2609 11. Now that a reference to $sender_host_address automatically causes a reverse
2610 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2611 host lookup before query-style lookups in lists that might use this
2612 variable. This has therefore been abolished, and the "net-" prefix is no
2613 longer necessary for query-style lookups.
2615 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2616 have been a typo for LFLAGS, so it has been changed.
2618 13. The install script calls Exim with "-C /dev/null" in order to find the
2619 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2620 to be output. Howeve, since Exim outputs its version number before the
2621 error, it didn't break the script. It just looked ugly. I fixed this by
2622 always allowing "-C /dev/null" if the caller is root.
2624 14. Ignore overlarge ACL variable number when reading spool file - insurance
2625 against a later release with more variables having written the file.
2627 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2628 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2629 this, as well as the form without the "IPv6" on the front.
2631 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2632 OS/Makefile-Darwin file.
2634 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2635 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2637 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2638 variable. However, some OS use ints for inodes. I've added cast to long int
2639 to get rid of the compiler warning.
2641 19. I had forgotten to lock out "/../" in configuration file names when
2642 ALT_CONFIG_PREFIX was set.
2644 20. Routers used for verification do not need to specify transports. However,
2645 if such a router generated a host list, and callout was configured, Exim
2646 crashed, because it could not find a port number from the (non-existent)
2647 transport. It now assumes port 25 in this circumstance.
2649 21. Added the -t option to exigrep.
2651 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2652 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2653 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2654 them is set, LOOKUP_LSEARCH is forced.
2656 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2658 24. Added sender and host information to the "rejected by local_scan()" log
2659 line; previously there was no indication of these.
2661 25. Added .include_if_exists.
2663 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2664 Linux. It turns out that not all file systems support this. Apparently some
2665 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2666 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2667 not supported on the file descriptor, is now ignored when Exim is trying to
2668 sync a directory. This applies only to Linux.
2670 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2672 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2673 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2676 29. Added support for maildirsize files from supplied patch (modified a bit).
2678 30. The use of :fail: followed by an empty string could lead Exim to respond to
2679 sender verification failures with (e.g.):
2681 550 Verification failed for <xxx>
2682 550 Sender verify failed
2684 where the first response line was missing the '-' that indicates it is not
2685 the final line of the response.
2687 31. The loop for finding the name of the user that called Exim had a hardwired
2688 limit of 10; it now uses the value of finduser_retries, which is used for
2689 all other user lookups.
2691 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2694 33. Exim was neglecting to zero errno before one call of strtol() when
2695 expanding a string and expecting an integer value. On some systems this
2696 resulted in spurious "integer overflow" errors. Also, it was casting the
2697 result into an int without checking.
2699 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2700 did not work. The code looks as if it has *never* worked, though it appears
2701 to have been documented since at least releast 1.62. I have made it work.
2703 35. The "timeout_DNS" error in retry rules, also documented since at least
2704 1.62, also never worked. As it isn't clear exactly what this means, and
2705 clearly it isn't a major issue, I have abolished the feature by treating it
2706 as "timeout", and writing a warning to the main and panic logs.
2708 36. The display of retry rules for -brt wasn't always showing the error code
2711 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2712 timeout_connect_A, timeout_connect_MX.
2714 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2715 to the empty sender.
2717 39. The daemon was not analysing the content of -oX till after it had closed
2718 stderr and disconnected from the controlling terminal. This meant that any
2719 syntax errors were only noted on the panic log, and the return code from
2720 the command was 0. By re-arranging the code a little, I've made the
2721 decoding happen first, so such errors now appear on stderr, and the return
2722 code is 1. However, the actual setting up of the sockets still happens in
2723 the disconnected process, so errors there are still only recorded on the
2726 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2727 connections (as happens on some IP stacks) was logged at start up time as
2728 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2729 it from "IPv6 and IPv4", which means that two separate sockets are being
2732 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2733 says whether AF_INET or AF_INET6 was passed as an argument.
2735 42. Exiwhat output was messed up when time zones were included in log
2738 43. Exiwhat now gives more information about the daemon's listening ports,
2739 and whether -tls-on-connect was used.
2741 44. The "port" option of the smtp transport is now expanded.
2743 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2744 silently ignored. Now an error message is written to the main and panic
2747 46. There's a new ACL modifier called "logwrite" which writes to a log file
2748 as soon as it is encountered.
2750 47. Added $local_user_uid and $local_user_gid at routing time.
2752 48. Exim crashed when trying to verify a sender address that was being
2755 49. Exim was recognizing only a space character after ".include". It now also
2756 recognizes a tab character.
2758 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2759 extracting the relevant information from the specification. The man page no
2760 longer contains scrambled data for the -d option, and I've added a section
2761 at the front about calling Exim under different names.
2763 51. Added "extra_headers" argument to the "mail" command in filter files.
2765 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2768 53. Installed eximstats 1.29.
2770 54. Added transport_filter_timeout as a generic transport option.
2772 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2773 Cc: header lines. This was required by RFC 822, but it not required by RFC
2776 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2777 incoming messages that did not have them. Now it does so only if the
2778 message originates locally, that is, if there is no associated remote host
2779 address. When Resent- header lines are present, this applies to the Resent-
2780 lines rather than the non-Resent- lines.
2782 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2783 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2785 58. Messages for configuration errors now include the name of the main
2786 configuration file - useful now that there may be more than one file in a
2787 list (.included file names were always shown).
2789 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2790 for those rare installations that do not start the daemon as root or run it
2791 setuid root. I've cut out the call to initgroups() if the daemon is not
2794 60. The Exim user and group can now be bound into the binary as text strings
2795 that are looked up at the start of Exim's processing.
2797 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2799 62. Added $mailstore_basename variable.
2801 63. Installed patch to sieve.c from Michael Haardt.
2803 64. When Exim failed to open the panic log after failing to open the main log,
2804 the original message it was trying to log was written to stderr and debug
2805 output, but if they were not available (the usual case in production), it
2806 was lost. Now it is written to syslog before the two lines that record the
2807 failures to open the logs.
2809 65. Users' Exim filters run in subprocesses under the user's uid. It is
2810 possible for a "deliver" command or an alias in a "personal" command to
2811 provoke an address rewrite. If logging of address rewriting is configured,
2812 this fails because the process is not running as root or exim. There may be
2813 a better way of dealing with this, but for the moment (because 4.30 needs
2814 to be released), I have disabled address rewrite logging when running a
2815 filter in a non-root, non-exim process.
2821 1. The buildconfig auxiliary program wasn't quoting the value set for
2822 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2823 not defined. This bug was masked in 4.22 by the effect that was fixed in
2826 2. Some messages that were rejected after a message id was allocated were
2827 shown as "incomplete" by exigrep. It no longer does this for messages that
2828 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2830 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2831 have allow_domain_literals set, the ID did not get logged in the <= line.
2832 Domain literals are now always recognized in Message-ID: header lines.
2834 4. The first argument for a ${extract expansion item is the key name or field
2835 number. Leading and trailing spaces in this item were not being ignored,
2836 causing some misleading effects.
2838 5. When deliver_drop_privilege was set, single queue runner processes started
2839 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2840 same command in the process it spins off) were not dropping privilege.
2842 6. When the daemon running as "exim" started a queue runner, it always
2843 re-executed Exim in the spun-off process. This is a waste of effort when
2844 deliver_drop_privilege is set. The new process now just calls the
2845 queue-runner function directly.
2851 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2854 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2855 ignored. Though the use of -oP was forcing the writing of a pid file, it
2856 was always written to the default place.
2858 3. If the message "no IP address found for host xxxx" is generated during
2859 incoming verification, it is now followed by identification of the incoming
2860 connection (so you can more easily find what provoked it).
2862 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2864 5. Added some features to "harden" Exim a bit more against certain attacks:
2866 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2867 be put in Local/Makefile. This is like the never_users runtime option,
2868 but it cannot be overridden. The default setting is "root".
2870 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2871 prefix string with which any file named in a -C command line option
2874 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2875 is retained for -C and -D only if the caller of Exim is root. Without
2876 it, the exim user may also use -C and -D and retain privilege.
2878 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2879 command line option is disabled.
2881 6. Macro names set by the -D option must start with an upper case letter, just
2882 like macro names defined in the configuration file.
2884 7. Added "dereference=" facility to LDAP.
2886 8. Two instances of the typo "uknown" in the source files are fixed.
2888 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2889 the Configure-Makefile script screwed up while processing it.
2891 10. Incorporated PCRE 4.4.
2893 11. The SMTP synchronization check was not operating right at the start of an
2894 SMTP session. For example, it could not catch a HELO sent before the client
2895 waited for the greeting. There is now a check for outstanding input at the
2896 point when the greeting is written. Because of the duplex, asynchronous
2897 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2898 way, but not yet received, when the check is performed.
2900 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2901 on TCP/IP sockets, because this apparently causes some broken clients to
2904 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2905 unchanged) from the Cygwin maintainer.
2907 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2908 was supported instead of testing for mbx. Effectively a typo.
2910 15. The spa authenticator server code was not checking that the input it
2911 received was valid base64.
2913 16. The debug output line for the "set" modifier in ACLs was not showing the
2914 name of the variable that was being set.
2916 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2918 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2919 lookup on its own. Something else was needed to trigger the lookup. For
2920 example, a match in host_lookup or the need for a host name in a host list.
2921 Now, if $sender_host_name is referenced and the host name has not yet been
2922 looked up, a lookup is performed. If the lookup fails, the variable remains
2923 empty, and $host_lookup_failed is set to "1".
2925 19. Added "eqi" as a case-independent comparison operator.
2927 20. The saslauthd authentication condition could segfault if neither service
2928 nor realm was specified.
2930 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2931 error message that was logged was misleading, and incoming SMTP
2932 connections were dropped. The message is now more accurate, and temporary
2933 errors are given to SMTP connections.
2935 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2936 (except RSET) with a 421 error, until QUIT is received. However, it was
2937 failing to send a response to QUIT.
2939 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2940 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2941 ACL is now run after the helo_try_verify_hosts code.
2943 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2944 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2945 case-independent, so other case variants are also recognized). Apparently
2946 some systems use these upper case variants.
2948 25. If more than two messages were waiting for the same host, and a transport
2949 filter was specified for the transport, Exim sent two messages over the
2950 same TCP/IP connection, and then failed with "socket operation on non-
2951 socket" when it tried to send the third.
2953 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2955 27. The extern definition of crypt16() in expand.c was not being excluded when
2956 the OS had its own crypt16() function.
2958 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2959 as a preferred synonym for return_size_limit, both as an option and as an
2962 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2964 30. Changed the default configuration ACL to relax the local part checking rule
2965 for addresses that are not in any local domains. For these addresses,
2966 slashes and pipe symbols are allowed within local parts, but the sequence
2967 /../ is explicitly forbidden.
2969 31. SPA server authentication was not clearing the challenge buffer before
2972 32. log_message in a "warn" ACL statement was writing to the reject log as
2973 well as to the main log, which contradicts the documentation and doesn't
2974 seem right (because no rejection is happening). So I have stopped it.
2976 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2977 However, I am unable to do any testing of this.
2979 34. Fixed an infelicity in the appendfile transport. When checking directories
2980 for a mailbox, to see if any needed to be created, it was accidentally
2981 using path names with one or more superfluous leading slashes; tracing
2982 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2984 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2985 contents are added to the log line that is written for every discarded
2986 recipient. (Previously a log_message setting was ignored.)
2988 36. The ${quote: operator now quotes the string if it is empty.
2990 37. The install script runs exim in order to find its version number. If for
2991 some reason other than non-existence or emptiness, which it checks, it
2992 could not run './exim', it was installing it with an empty version number,
2993 i.e. as "exim-". This error state is now caught, and the installation is
2996 38. An argument was missing from the function that creates an error message
2997 when Exim fails to connect to the socket for saslauthd authentication.
2998 This could cause Exim to crash, or give a corrupted message.
3000 39. Added isip, isip4, and isip6 to ${if conditions.
3002 40. The ACL variables $acl_xx are now saved with the message, and can be
3003 accessed later in routers, transports, and filters.
3005 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3006 strings in the file are not string-expanded.
3008 42. If a MAIL command specified a SIZE value that was too large to fit into an
3009 int variable, the check against message_size_limit failed. Such values are
3010 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3011 day this will have to be increased, but I don't think I want to be around
3012 when emails are that large.
3019 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3020 iconv() is not standard in FreeBSD.
3022 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3023 IPv6 enabled. The observed symptom was a segmentation fault on return from
3024 the function os_common_find_running_interfaces() in src/os.c.
3026 3. In the check_special_case() function in daemon.c I had used "errno" as an
3027 argument name, which causes warnings on some systems. This was basically a
3028 typo, since it was named "eno" in the comments!
3030 4. The code that waits for the clock to tick (at a resolution of some fraction
3031 of a second) so as to ensure message-id uniqueness was always waiting for
3032 at least one whole tick, when it could have waited for less. [This is
3033 almost certainly not relevant at current processor speeds, where it is
3034 unlikely to ever wait at all. But we try to future-proof.]
3036 5. The function that sleeps for a time interval that includes fractions of a
3037 second contained a race. It did not block SIGALRM between setting the
3038 timer, and suspending (a couple of lines later). If the interval was short
3039 and the sigsuspend() was delayed until after it had expired, the suspension
3040 never ended. On busy systems this could lead to processes getting stuck for
3043 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3044 process, before it forks any delivery processes. The open lookup caching
3045 mechanism meant that the open file or database connection was passed into
3046 the delivery process. The problem was that delivery processes always tidy
3047 up cached lookup data. This could cause a problem for the next delivery
3048 process started by the queue runner, because the external queue runner
3049 process does not know about the closure. So the next delivery process
3050 still has data in the lookup cache. In the case of a file lookup, there was
3051 no problem because closing a file descriptor in a subprocess doesn't affect
3052 the parent. However, if the lookup was caching a connection to a database,
3053 the connection was closed, and the second delivery process was likely to
3054 see errors such as "PGSQL: query failed: server closed the connection
3055 unexpectedly". The problem has been fixed by closing all cached lookups
3056 in a queue runner before running a delivery process.
3058 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3059 seem to have the "const" qualifier which it has on other OS. I've
3062 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3063 *of the same type* (client or server) with the same public name that an
3064 error should be diagnosed.
3066 9. When Exim looked up a host name for an IP address, but failed to find the
3067 original IP address when looking up the host name (a safety check), it
3068 output the message "<ip address> does not match any IP for NULL", which was
3069 confusing, to say the least. The bug was that the host name should have
3070 appeared instead of "NULL".
3072 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3073 user that is built into the binary, and the -C or -D options is used, root
3074 privilege is dropped before the configuration file is read. In addition,
3075 logging is switched to stderr instead of the normal log files. If the
3076 configuration then re-defines the Exim user, the unprivileged environment
3077 is probably not what is expected, so Exim logs a panic warning message (but
3080 However, if deliver_drop_privilege is set, the unprivileged state may well
3081 be exactly what is intended, so the warning has been cut out in that case,
3082 and Exim is allowed to try to write to its normal log files.
3088 1. smtp_return_error_details was not giving details for temporary sender
3089 or receiver verification errors.
3091 2. Diagnose a configuration error if two authenticators have the same public
3094 3. Exim used not to create the message log file for a message until the first
3095 delivery attempt. This could be confusing when incoming messages were held
3096 for policy or load reasons. The message log file is now created at the time
3097 the message is received, and an initial "Received" line is written to it.
3099 4. The automatically generated man page for command line options had a minor
3100 bug that caused no ill effects; however, a more serious problem was that
3101 the procedure for building the man page automatically didn't always
3102 operate. Consequently, release 4.20 contains an out-of-date version. This
3103 shouldn't happen again.
3105 5. When building Exim with embedded Perl support, the script that builds the
3106 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3107 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3109 6. The freeze_tell option was not being used for messages that were frozen on
3110 arrival, either by an ACL or by local_scan().
3112 7. Added the smtp_incomplete_transaction log selector.
3114 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3115 was accepting AUTH without a new EHLO.
3117 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3118 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3121 10. Logging of TCP/IP connections (when configured) now happens in the main
3122 daemon process instead of the child process, so that the TCP/IP connection
3123 count is more accurate (but it can never be perfect).
3125 11. The use of "drop" in a nested ACL was not being handled correctly in the
3126 outer ACL. Now, if condition failure induced by the nested "drop" causes
3127 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3128 or "require"), the connection is dropped.
3130 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3131 that yield "discard" can now be used with an "accept" or a "discard" verb,
3132 but an error is generated for any others (because I can't see a useful way
3133 to define what should happen).
3135 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3136 are now processed in the same way as lines in the Exim configuration file.
3137 In particular, continuation lines are supported.
3139 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3141 15. Added -ti meaning -t -i.
3143 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3144 domains, and warn by logging if others are found.
3146 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3147 returned from GIFCONF when Exim is trying to find the list of interfaces on
3148 a host. The code in os.c has been modified to copy each ifreq to an aligned
3149 structure in all cases.
3151 Also, in some cases, the returned ifreq's were being copied to a 'struct
3152 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3153 means the last couple of bytes of an IPv6 address could be chopped if the
3154 ifreq contained only a normal sockaddr (14 bytes storage).
3156 18. Named domain lists were not supported in the hosts_treat_as_local option.
3157 An entry such as +xxxx was not recognized, and was treated as a literal
3160 19. Ensure that header lines added by a DATA ACL are included in the reject log
3161 if the ACL subsequently rejects the message.
3163 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3164 MD5 (which is deprecated).
3166 21. When testing a filter file using -bf, Exim was writing a message when it
3167 took the sender from a "From " line in the message, but it was not doing so
3168 when it took $return_path from a Return-Path: header line. It now does.
3170 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3171 with a valid header line field name (a series of printing characters
3172 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3174 23. Changed "disc" in the source to "disk" to conform to the documentation and
3175 the book and for uniformity.
3177 24. Ignore Sendmail's -Ooption=value command line item.
3179 25. When execve() failed while trying to run a command in a pipe transport,
3180 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3181 could be confused with a return value of 69 from the command itself. This
3182 has been changed to 127, the value the shell returns if it is asked to run
3183 a non-existent command. The wording for the related log line suggests a
3184 non-existent command as the problem.
3186 26. If received_header_text expands to an empty string, do not add a Received:
3187 header line to the message. (Well, it adds a token one on the spool, but
3188 marks it "old" so that it doesn't get used or transmitted.)
3190 27. Installed eximstats 1.28 (addition of -nt option).
3192 28. There was no check for failure on the call to getsockname() in the daemon
3193 code. This can fail if there is a shortage of resources on the system, with
3194 ENOMEM, for example. A temporary error is now given on failure.
3196 29. Contrary to the C standard, it seems that in some environments, the
3197 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3198 program. Exim now does this explicitly; it affects the formatting of
3199 timestamps using strftime().
3201 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3202 complaints. I've now initialized all the variables, to avoid this.
3204 32. Header lines added by a system filter were not being "seen" during
3205 transport-time rewrites.
3207 33. The info_callback() function passed to OpenSSL is set up with type void
3208 (*)(SSL *, int, int), as described somewhere. However, when calling the
3209 function (actually a macro) that sets it up, the type void(*)() is
3210 expected. I've put in a cast to prevent warnings from picky compilers.
3212 34. If a DNS black list lookup found a CNAME record, but there were no A
3213 records associated with the domain it pointed at, Exim crashed.
3215 35. If a DNS black list lookup returned more than one A record, Exim ignored
3216 all but the first. It now scans all returned addresses if a particular IP
3217 value is being sought. In this situation, the contents of the
3218 $dnslist_value variable are a list of all the addresses, separated by a
3221 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3222 to accept a host name and all its aliases if the forward lookup for any of
3223 them yielded the IP address of the incoming connection. Now it accepts only
3224 those names whose forward lookup yields the correct IP address. Any other
3225 names are discarded. This closes a loophole whereby a rogue DNS
3226 administrator could create reverse DNS records to break through a
3227 wildcarded host restriction in an ACL.
3229 37. If a user filter or a system filter that ran in a subprocess used any of
3230 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3231 the wrong values were passed to the pipe command ($thisaddress had the
3232 value of $0, $0 had the value of $1, etc). This bug was introduced by
3233 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3235 38. Improved the line breaking for long SMTP error messages from ACLs.
3236 Previously, if there was no break point between 40 and 75 characters, Exim
3237 left the rest of the message alone. Two changes have been made: (a) I've
3238 reduced the minimum length to 35 characters; (b) if it can't find a break
3239 point between 35 and 75 characters, it looks ahead and uses the first one
3240 that it finds. This may give the occasional overlong line, but at least the
3241 remaining text gets split now.
3243 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3244 file descriptors might be low, and that setting 1000 would always raise it.
3245 It turns out that in some environments, the limit is already over 1000 and
3246 that lowering it causes trouble. So now Exim takes care not to decrease it.
3248 40. When delivering a message, the value of $return_path is set to $sender_
3249 address at the start of routing (routers may change the value). By an
3250 oversight, this default was not being set up when an address was tested by
3251 -bt or -bv, which affected the outcome if any router or filter referred to
3254 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3255 log only when "message" or "log_message" are set. However, if one of the
3256 conditions was an address verification, or a call to a nested ACL, the
3257 messages generated by the underlying test were being passed through. This
3258 no longer happens. The underlying message is available in $acl_verify_
3259 message for both "message" and "log_message" expansions, so it can be
3260 passed through if needed.
3262 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3263 new expansion $bh_ to give the encoded byte string without charset
3264 translation. Translation happens only if iconv() is available; HAVE_ICONV
3265 indicates this at build time. HEADERS_CHARSET gives the charset to
3266 translate to; headers_charset can change it in the configuration, and
3267 "headers charset" can change it in an individual filter file.
3269 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3270 that creates RFC 2047 encoded "words" labels them as that charset instead
3271 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3272 expansion operator; (ii) when Exim creates a From: line for a local
3273 message; (iii) when a header line is rewritten to include a "phrase" part.
3275 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3276 buggy, causing it to skip the first lines of messages whose message ID
3277 ended in 'D'. This would not have bitten before Exim release 4.14, because
3278 message IDs were unlikely to end in 'D' before then. The effect was to have
3279 incorrect size information for certain domains.
3281 45. #include "config.h" was missing at the start of the crypt16.c module. This
3282 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3285 46. If there was a timeout during a "random" callout check, Exim treated it as
3286 a failure of the random address, and carried on sending RSET and the real
3287 address. If the delay was just some slowness somewhere, the response to the
3288 original RCPT would be taken as a response to RSET and so on, causing
3289 mayhem of various kinds.
3291 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3292 when I implemented it. It didn't allow for the fact that some option values
3293 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3294 the right test for positive values.
3296 48. Domain names in DNS records are case-independent. Exim always looks them up
3297 in lower case. Some resolvers return domain names in exactly the case they
3298 appear in the zone file, that is, they may contain uppercase letters. Not
3299 all resolvers do this - some return always lower case. Exim was treating a
3300 change of case by a resolver as a change of domain, similar to a widening
3301 of a domain abbreviation. This triggered its re-routing code and so it was
3302 trying to route what was effectively the same domain again. This normally
3303 caused routing to fail (because the router wouldn't handle the domain
3304 twice). Now Exim checks for this case specially, and just changes the
3305 casing of the domain that it ultimately uses when it transmits the message
3308 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3311 50. If a filter generated a file delivery with a non-absolute name (possible if
3312 no home directory exists for the router), the forbid_file option was not
3315 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3316 the existing equality matching.
3318 52. Exim was using ints instead of ino_t variables in some places where it was
3319 dealing with inode numbers.
3321 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3322 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3323 called TMPDIR, and if it finds it is different, it changes its value.
3325 54. The smtp_printf() function is now made available to local_scan() so
3326 additional output lines can be written before returning. There is also an
3327 smtp_fflush() function to enable the detection of a dropped connection.
3328 The variables smtp_input and smtp_batched_input are exported to
3331 55. Changed the default runtime configuration: the message "Unknown user"
3332 has been removed from the ACL, and instead placed on the localuser router,
3333 using the cannot_route_message feature. This means that any verification
3334 failures that generate their own messages won't get overridden. Similarly,
3335 the "Unrouteable address" message that was in the ACL for unverifiable
3336 relay addresses has also been removed.
3338 56. Added hosts_avoid_esmtp to the smtp transport.
3340 57. The exicyclog script was not checking for the esoteric option
3341 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3342 will work only if exicyclog is run under the appropriate euid.
3344 58. Following a discussion on the list, the rules by which Exim recognises line
3345 endings on incoming messages have been changed. The -dropcr and drop_cr
3346 options are now no-ops, retained only for backwards compatibility. The
3347 following line terminators are recognized: LF CRLF CR. However, special
3348 processing applies to CR:
3350 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3351 nor a local message in the state where . is a terminator.
3353 (ii) If a bare CR is encountered in a header line, an extra space is added
3354 after the line terminator so as not to end the header. The reasoning
3355 behind this is that bare CRs in header lines are most likely either
3356 to be mistakes, or people trying to play silly games.
3358 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3359 was being incorrectly given as 18 bytes larger than it should have been.
3360 This is a VOB (very old bug).
3362 60. This may never have affected anything current, but just in case it has:
3363 When the local host is found other than at the start of a list of hosts,
3364 the local host, those with the same MX, and any that follow, are discarded.
3365 When the list in question was part of a longer list of hosts, the following
3366 hosts (not currently being processed) were also being discarded. This no
3367 longer happens. I'm not sure if this situation could ever has previously
3370 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3373 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3374 header. This is something that is recommended in a new Internet Draft, and
3375 is something that is documented as being done by Sendmail. There are two
3376 possible values. For messages generated by the autoreply transport, Exim
3379 Auto-Submitted: auto-replied
3381 whereas for all other generated messages (e.g. bounces) it adds
3383 Auto-Submitted: auto-generated
3385 63. The "personal" condition in filters now includes a test for the
3386 Auto-Submitted: header. If it contains the string "auto-" the message it
3387 not considered personal.
3389 64. Added rcpt_include_affixes as a generic transport option.
3391 65. Added queue_only_override (default true).
3393 66. Added the syslog_duplication option.
3395 67. If what should have been the first header line of a message consisted of
3396 a space followed by a colon, Exim was mis-interpreting it as a header line.
3397 It isn't of course - it is syntactically invalid and should therefore be
3398 treated as the start of the message body. The misbehaviour could have
3399 caused a number of strange effects, including loss of data in subsequent
3400 header lines, and spool format errors.
3402 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3403 client host had authenticated. This control can now be exercised by an ACL
3404 for more flexibility.
3406 69. By default, callouts do not happen when testing with -bh. There is now a
3407 variant, -bhc, which does actually run the callout code, including
3408 consulting and updating the callout cache.
3410 70. Added support for saslauthd authentication, courtesy of Alexander
3413 71. If statvfs() failed on the spool or log directories while checking their
3414 size for availability, Exim confusingly gave the error "space shortage".
3415 Furthermore, in debugging mode it crashed with a floating point exception.
3416 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3417 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3418 serious problem, Exim now writes to the main and panic logs when this
3419 happens, with details of the failure. It then refuses to accept the
3420 incoming message, giving the message "spool directory problem" or "log
3421 directory problem" with a 421 code for SMTP messages.
3423 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3424 0, 1, and 2 exist, because some OS complain for execs without them (see
3425 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3426 descriptors. However, the code omitted to check that the open succeeded,
3427 causing mysterious errors if for some reason the permissions on /dev/null
3428 got screwed. Now Exim writes a message to the main and panic logs, and
3429 bombs out if it can't open /dev/null.
3431 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3432 interact so that it is all more flexible. It is supposed to remain
3433 backwards compatible. Also added extra_local_interfaces.
3435 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3436 to bomb out with an assertion failure - to the client this appears as a
3437 connection drop. This problem occurs in the part of the code that was taken
3438 from the Samba project. Fortunately, the assertion is in a very simple
3439 function, so I have fixed this by reproducing the function inline in the
3440 one place where it is called, and arranging for authentication to fail
3441 instead of killing the process with assert().
3443 75. The SPA client code was not working when the server requested OEM rather
3444 than Unicode encoding.
3446 76. Added code to make require_files with a specific uid setting more usable in
3447 the case where statting the file as root fails - usually a non-root-mounted
3448 NFS file system. When this happens and the failure is EACCES, Exim now
3449 forks a subprocess and does the per-uid checking as the relevant uid.
3451 77. Added process_log_path.
3453 78. If log_file_path was not explicitly set, a setting of check_log_space or
3454 check_log_inodes was ignored.
3456 79. If a space check for the spool or log partitions fails, the incident is now
3457 logged. Of course, in the latter case the data may get lost...
3459 80. Added the %p formatting code to string_format() so that it can be used to
3460 print addresses in debug_print(). Adjusted all the address printing in the
3461 debugging in store.c to use %p rather than %d.
3463 81. There was a concern that a line of code in smtp_in.c could overflow a
3464 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3465 initially expressed, the concern was not well-founded, because trailing
3466 spaces are removed early. However, if the trailing spaces were followed by
3467 a NULL, they did not get removed, so the overflow was possible. Two fixes
3470 (a) I re-wrote the offending code in a cleaner fashion.
3471 (b) If an incoming SMTP command contains a NULL character, it is rejected
3474 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3475 runs initgroups(), so that if the Exim user is in any additional groups,
3476 they will be used during message reception.
3482 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob