removed 4.54-PH/06. The change it describes was not present in the 4.54 release...
[exim.git] / doc / doc-txt / ChangeLog
01e0dc8f 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.279 2005/12/15 18:09:55 jetmore Exp $
3Change log file for Exim from version 4.21
6Exim version 4.61
9PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
15 addresses as local.
17PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
20PH/03 Added disable_ipv6.
22PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
27 grumble.
29PH/05 If group was specified without a user on a router, and no group or user
30 was specified on a transport, the group from the router was ignored.
32PH/06 Increased the number of ACL variables to 20 of each type, and arranged
33 for visible compile-time settings that can be used to change these
34 numbers, for those that want even more. Backwards compatibility with old
35 spool files has been maintained. However, going back to a previous Exim
36 release will lost any variables that are in spool files.
38PH/07 Two small changes when running in the test harness: increase delay when
39 passing a TCP/IP connection to a new process, in case the original
40 process has to generate a bounce, and remove special handling of
41 (sic), which is no longer necessary.
43PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
46PH/09 Moved a debug statement in filter processing to avoid a race problem when
47 testing.
49JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
52JJ/02 exipick: Added support for new ACL variable spool format introduced
53 in 4.61-PH/06
214e2000 55
56Exim version 4.60
59PH/01 Two changes to the default runtime configuration:
61 (1) Move the checks for relay_from_hosts and authenticated clients from
62 after to before the (commented out) DNS black list checks.
64 (2) Add control=submission to the relay_from_hosts and authenticated
65 clients checks, on the grounds that messages accepted by these
66 statements are most likely to be submissions.
5de37277 67
68PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
70 (1) Generate an error if the third argument for the ${prvs expansion is
71 not a single digit.
73 (2) Treat a missing third argument of ${prvscheck as if it were an empty
74 string.
76 (3) Reset the variables that are obtained from the first argument of
77 ${prvscheck and used in the second argument before leaving the code,
78 because their memory is reclaimed, so using them afterwards may do
79 silly things.
81 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
82 one (it's much easier than Tom thought :-).
84 (5) Because of (4), we can now allow for the use of $prvscheck_result
85 inside the third argument.
cb9328de 86
87PH/03 For some reason, the default setting of PATH when running a command from
88 a pipe transport was just "/usr/bin". I have changed it to
89 "/bin:/usr/bin".
92 anything to be listed in the output from -bV.
b2f5a032 93
94PH/05 When a filter generated an autoreply, the entire To: header line was
95 quoted in the delivery log line, like this:
97 => >A.N.Other <ano@some.domain> <original@ddress> ...
99 This has been changed so that it extracts the operative address. There
100 may be more than one such address. If so, they are comma-separated, like
101 this:
103 => >ano@some.domain,ona@other.domain <original@ddress> ...
105PH/06 When a client host used a correct literal IP address in a HELO or EHLO
106 command, (for example, EHLO []) and the client's IP address was
107 not being looked up in the rDNS to get a host name, Exim was showing the
108 IP address twice in Received: lines, even though the IP addresses were
109 identical. For example:
111 Received: from [] (helo=[])
113 However, if the real host name was known, it was omitting the HELO data
114 if it matched the actual IP address. This has been tidied up so that it
115 doesn't show the same IP address twice.
117PH/07 When both +timestamp and +memory debugging was on, the value given by
118 $tod_xxx expansions could be wrong, because the tod_stamp() function was
119 called by the debug printing, thereby overwriting the timestamp buffer.
120 Debugging no longer uses the tod_stamp() function when +timestamp is set.
122PH/08 When the original message was included in an autoreply transport, it
123 always said "this is a copy of the message, including all the headers",
124 even if body_only or headers_only was set. It now gives an appropriate
125 message.
127PH/09 Applied a patch from the Sieve maintainer which:
129 o fixes some comments
130 o adds the (disabled) notify extension core
131 o adds some debug output for the result of if/elsif tests
132 o points to the current vacation draft in the documentation
133 and documents the missing references header update
135 and most important:
137 o fixes a bug in processing the envelope test (when testing
138 multiple envelope elements, the last element determinted the
139 result)
141PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
142 Electronic Mail") by including:
144 Auto-submitted: auto-generated
146 in the messages that it generates (bounce messages and others, such as
147 warnings). In the case of bounce messages for non-SMTP mesages, there was
148 also a typo: it was using "Auto_submitted" (underscore instead of
149 hyphen). Since every message generated by Exim is necessarily in response
150 to another message, thes have all been changed to:
152 Auto-Submitted: auto-replied
154 in accordance with these statements in the RFC:
156 The auto-replied keyword:
158 - SHOULD be used on messages sent in direct response to another
159 message by an automatic process,
161 - MUST NOT be used on manually-generated messages,
163 - MAY be used on Delivery Status Notifications (DSNs) and Message
164 Disposition Notifications (MDNs),
166 - MUST NOT be used on messages generated by automatic or periodic
167 processes, except for messages which are automatic responses to
168 other messages.
170PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
171 to the default Received: header definition.
456682f5 172
173PH/12 Added log selector acl_warn_skipped (default on).
175PH/13 After a successful wildlsearch lookup, discard the values of numeric
176 variables because (a) they are in the wrong storage pool and (b) even if
177 they were copied, it wouldn't work properly because of the caching.
179PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
180 checking when decoding. Apparently there are clients that generate
181 overlong encoded strings. Why am I not surprised?
183PH/15 If the first argument of "${if match_address" was not empty, but did not
184 contain an "@" character, Exim crashed. Now it writes a panic log message
185 and treats the condition as false.
187PH/16 In autoreply, treat an empty string for "once" the same as unset.
189PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
190 extension "envelope-auth". The code is finished and in agreement with
191 other implementations, but there is no documentation so far and in fact,
192 nobody wrote the draft yet. This extension is currently #undef'ed, thus
193 not changing the active code.
195 Print executed "if" and "elsif" statements when debugging is used. This
196 helps a great deal to understand what a filter does.
198 Document more things not specified clearly in RFC3028. I had all this
199 sorted out, when out of a sudden new issues came to my mind. Oops."
201PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
202 (Bugzilla #53).
204PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
205 canonical form (as documented). However, after a host name lookup from
206 the IP address, check_host() was doing a simple string comparison with
207 addresses acquired from the DNS when checking that the found name did
208 have the original IP as one of its addresses. Since any found IPv6
209 addresses are likely to be in abbreviated form, the comparison could
210 fail. Luckily, there already exists a function for doing the comparison
211 by converting both addresses to binary, so now that is used instead of
212 the text comparison.
214PH/20 There was another similar case to PH/19, when a complete host name was
215 given in a host list; looking up its IP address could give an abbreviated
216 form, whereas the current host's name might or might not be abbreviated.
217 The same fix has been applied.
5de37277 219
220Exim version 4.54
223PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
224 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
225 It now does.
227PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
228 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
230PH/03 Typo: missing ".o" in src/pcre/Makefile.
232PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
233 header line, restrict the check to what is listed in RFCs 2369 and 2929.
234 Also, for "Auto-Submitted", treat anything other than "no" as
235 non-personal, in accordance with RFC 3834. (Previously it treated
236 anything starting "auto-" as non-personal.)
238TF/01 The control=submission/name=... option had a problem with syntax
239 errors if the name included a slash character. The /name= option
240 now slurps the rest of the string, so it can include any characters
241 but it must come last in the list of options (after /sender_retain
242 or /domain=).
244PH/05 Some modifications to the interface to the fake nameserver for the new
245 testing suite.
3e46c1aa 247
9a799bc0 248
249Exim version 4.53
252TK/01 Added the "success_on_redirect" address verification option. See
253 NewStuff for rationale and an example.
255PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
257PH/02 Patch to exigrep to allow it to work on syslog lines.
259PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
260 fread() to skip over the body file's header line, because in Cygwin the
261 header line is locked and is inaccessible.
263PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
264 co-exist for some time) to make it clear that it is the Exim ID that is
265 referenced, not the Message-ID: header line.
267PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
268 string_format() function, because snprintf() does not exist on all
269 operating systems.
271PH/06 The use of forbid_filter_existstest now also locks out the use of the
272 ${stat: expansion item.
274PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
275 protocol synchronization error", to keep the pedants happy.
277PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
278 well as for IRIX systems, when gcc is being used. See the host.c source
279 file for comments.
281PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
283PH/10 Named domain lists were not working if used in a queue_smtp_domains
284 setting.
286PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
287 transport and to the smtp transport in LMTP mode.
289TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
291PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
292 run a filter in a subprocess. This could lead to confusion in subsequent
293 lookups in the parent process. There should also be a search_tidyup() at
294 the end of the subprocess.
296PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
297 only if the host matched helo_try_verify_hosts, which caused the
298 verification to occur when the EHLO/HELO command was issued. The ACL just
299 tested the remembered result. Now, if a previous verification attempt has
300 not happened, "verify = helo" does it there and then.
302JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
304TK/03 Fix log output including CR from clamd.
306PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
307 exist provoked a memory error which could cause a segfault.
309PH/15 Installed PCRE 6.2
311PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
313PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
314 of the problem. Specifically, suggested +O2 rather than +O1 for the
315 HP-UX compiler.
317PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
319PH/20 If a delivery was routed to a non-standard port by means of an SRV
320 record, the port was not correctly logged when the outgoing_port log
321 selector was set (it logged the transort's default port).
323PH/21 Added support for host-specific ports to manualroute, queryprogram,
324 fallback_hosts, and "hosts" in the smtp transport.
326PH/22 If the log selector "outgoing_port" is set, the port is now also given on
327 host errors such as "Connection refused".
329PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
330 authentication with radiusclient 0.4.9:
332 - Error returned from rc_read_config was caught wrongly
333 - Username/password not passed on to radius server due to wrong length.
335 The presumption is that some radiusclient API changes for 4.51/PH/17
336 were not taken care of correctly. The code is still untested by me (my
337 Linux distribution still has 0.3.2 of radiusclient), but it was
338 contributed by a Radius user.
340PH/24 When doing a callout, the value of $domain wasn't set correctly when
341 expanding the "port" option of the smtp transport.
343TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
344 while reading a MIME header. Thanks to Tom Hughes for a patch.
346PH/24 Include config.h inside local_scan.h so that configuration settings are
347 available.
349PH/25 Make $smtp_command_argument available after all SMTP commands. This means
350 that in an ACL for RCPT (for example), you can examine exactly what was
351 received.
353PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
354 commands, but it was not correctly comparing the address with the actual
355 client host address. Thus, it would show the EHLO address in Received:
356 header lines when this was not necessary.
358PH/27 Added the % operator to ${eval:}.
360PH/28 Exim tries to create and chdir to its spool directory when it starts;
361 it should be ignoring failures (because with -C, for example, it has lost
362 privilege). It wasn't ignoring creation failures other than "already
363 exists".
365PH/29 Added "crypteq" to the list of supported features that Exim outputs when
366 -bV or -d is used.
368PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
369 because an input line was too long, either on its own, or by virtue of
370 too many continuations, the temporary file was not being removed, and the
371 return code was incorrect.
aa2b5c79 372
373PH/31 Missing "BOOL" in function definition in filtertest.c.
375PH/32 Applied Sieve patches from the maintainer.
377TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
379PH/33 Added "verify = not_blind".
381PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
382 Local/Makefile (with some defaults set). These are used in built scripts
383 such as exicyclog, but they have never been used in the exim_install
384 script (though there are many overriding facilities there). I have
385 arranged that the exim_install script now takes note of these two
386 settings.
388PH/35 Installed configuration files for Dragonfly.
390PH/36 When a locally submitted message by a trusted user did not contain a
391 From: header, and the sender address was obtained from -f or from an SMTP
392 MAIL command, and the trusted user did not use -F to supply a sender
393 name, $originator_name was incorrectly used when constructing a From:
394 header. Furthermore, $originator_name was used for submission mode
395 messages from external hosts without From: headers in a similar way,
396 which is clearly wrong.
398PH/37 Added control=suppress_local_fixups.
400PH/38 When log_selector = +received_sender was set, and the addition of the
401 sender made the log line's construction buffer exactly full, or one byte
402 less than full, an overflow happened when the terminating "\n" was
403 subsequently added.
405PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
406 when the result of a list match is failure because a DNS lookup failed.
408PH/40 RM_COMMAND is now used in the building process.
410PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
411 the "build-* directories that it finds.
413PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
414 address in a domain literal was a prefix of an interface address.
416PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
417 when verifying a sender address, unless rewrite_headers is false.
419PH/44 Wrote a long comment about why errors_to addresses are verified as
420 recipients, not senders.
422TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
423 the ratelimit ACL was added.
425PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
427PH/46 Added extra information about PostgreSQL errors to the error string.
429PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
430 avoiding the need to install special zones in a real server. This is
431 backwards compatible; if it can't find the fake resolver, it drops back.
432 Thus, both old and new test suites can be run.
434TF/02 Added util/
436TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
437 clock is set back in time.
439TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
440 Candler <>.
442TF/05 The fix for PH/43 was not completely correct; widen_domains is always
443 OK for addresses that are the result of redirections.
445PH/48 A number of further additions for the benefit of the new test suite,
446 including a fake gethostbyname() that interfaces to the fake DNS resolver
447 (see PH/47 above).
449TF/06 The fix for widen_domains has also been applied to qualify_single and
450 search_parents which are the other dnslookup options that can cause
451 header rewrites.
453PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
454 type ("H").
456PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
458TF/07 Exim produced the error message "an SRV record indicated no SMTP
459 service" if it encountered an MX record with an empty target hostname.
460 The message is now "an MX or SRV record indicated no SMTP service".
462TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
463 if the DNS of the sending site is misconfigured. This is quite a
464 common situation. This change restores the behaviour of treating a
465 helo verification defer as a failure.
467PH/51 If self=fail was set on a router, the bounce message did not include the
468 actual error message.
bbe902f0 470
471Exim version 4.52
474TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
476PH/01 When a transport filter timed out in a pipe delivery, and the pipe
477 command itself ended in error, the underlying message about the transport
478 filter timeout was being overwritten with the pipe command error. Now the
479 underlying error message should be appended to the second error message.
481TK/01 Fix poll() being unavailable on Mac OSX 10.2.
483PH/02 Reduce the amount of output that "make" produces by default. Full output
484 can still be requested.
486PH/03 The warning log line about a condition test deferring for a "warn" verb
487 was being output only once per connection, rather than after each
488 occurrence (because it was using the same function as for successful
489 "warn" verbs). This seems wrong, so I have changed it.
491TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
492 it should not have, which might have caused a crash in the right
493 circumstances, but probably never did.
495PH/04 Installed a modified version of Tony Finch's patch to make submission
496 mode fix the return path as well as the Sender: header line, and to
497 add a /name= option so that you can make the user's friendly name appear
498 in the header line.
500TF/03 Added the control = fakedefer ACL modifier.
502TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
503 Mark Lowes for thorough testing.
870f6ba8 504
505TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
507TK/03 Merged latest SRS patch from Miles Wilton.
509PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
510 with the definition in sysexits.h (which is #included earlier).
511 Fortunately, Exim does not actually use EX_OK. The code used to try to
512 preserve the sysexits.h value, by assumimg that macro definitions were
513 scanned for macro replacements. I have been disabused of this notion,
514 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 515
516PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
517 in the smtp transport. When a block could not be written in a single
518 write() function, the timeout was being re-applied to each part-write.
519 This seems wrong - if the receiver was accepting one byte at a time it
520 would take for ever. The timeout is now adjusted when this happens. It
521 doesn't have to be particularly precise.
523TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
524 details. Thanks to Chris Webb <> for the patch!
526PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
527 without a domain if the check to <postmaster@domain> fails.
529SC/01 Eximstats: added -xls and the ability to specify output files
530 (patch written by Frank Heydlauf).
532SC/02 Eximstats: use FileHandles for outputing results.
534SC/03 Eximstats: allow any combination of xls, txt, and html output.
536SC/04 Eximstats: fixed display of large numbers with -nvr option
538SC/05 Eximstats: fixed merging of reports with empty tables.
540SC/06 Eximstats: added the -include_original_destination flag
542SC/07 Eximstats: removed tabs and trailing whitespace.
544TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
546TK/06 MBOX spool code: Add real "From " MBOX separator line
547 so the .eml file is really in mbox format (even though
548 most programs do not really care). Patch from Alex Miller.
550TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
551 The latter is generated from $received_to and is only set if the
552 message has one envelope recipient. SA can use these headers,
553 obviously out-of-the-box. Patch from Alex Miller.
555PH/08 The ${def test on a variable was returning false if the variable's
556 value was "0", contrary to what the specification has always said!
557 The result should be true unless the variable is empty.
559PH/09 The syntax error of a character other than { following "${if
560 def:variable_name" (after optional whitespace) was not being diagnosed.
561 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
562 accidental colon was present, for example, could give incorrect results.
564PH/10 Tidied the code in a number of places where the st_size field of a stat()
565 result is used (not including appendfile, where other changes are about
566 to be made).
568PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
569 This involved changing a lot of size variables from int to off_t. It
570 should work with maildirs and everything.
572TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
573 spamd dying while we are connected to it.
575TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
576 <>
578PH/12 Applied Alex Kiernan's patch for the API change for the error callback
579 function for BDB 4.3.
581PH/13 Changed auto_thaw such that it does not apply to bounce messages.
583PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
584 the sources for PCRE have been re-arranged and more files are now
585 involved.
587PH/15 The code I had for printing potentially long long variables in PH/11
588 above was not the best (it lost precision). The length of off_t variables
589 is now inspected at build time, and an appropriate printing format (%ld
590 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
591 to be "long long int" or "long int". This is needed for the internal
592 formatting function string_vformat().
b1c749bb 593
594PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
595 the configuration file to be ":syslog", then the script "guesses" where
596 the logs files are, rather than using the compiled in default. In our
597 case the guess is not the same as the compiled default, so the script
598 suddenly stopped working when I started to use syslog. The patch checks
599 to see if log_file_path is "". If so, it attempts to read it from exim
600 with no configuration file to get the compiled in version, before it
601 falls back to the previous guessing code."
603TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
604 implementing BATV in an Exim configuration. See NewStuff for the gory
605 details.
607PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
608 Makefile that are specific to HP-UX.
610PH/18 If the "use_postmaster" option was set for a recipient callout together
611 with the "random" option, the postmaster address was used as the MAIL
612 FROM address for the random test, but not for the subsequent recipient
613 test. It is now used for both.
615PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
616 patch removes a few documentation additions to RFC 3028, because the
617 latest draft now contains them. It adds the new en;ascii-case comparator
618 and a new error check for 8bit text in MIME parts. Comparator and
619 require names are now matched exactly. I enabled the subaddress
620 extension, but it is not well tested yet (read: it works for me)."
622PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
623 rework some of the code of TK/09 above to avoid the hardwired use of
624 "%lld" and "long long". Replaced the call to snprintf() with a call to
625 string_vformat().
627PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
628 records point to non-existent hosts", "retry timeout exceeded", and
629 "retry time not reached for any host after a long failure period".
ca02eafb 630
631PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
632 experimental DomainKeys support:
634 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
635 (2) On an error such as an illegally used "control", the wrong name for
636 the control was given.
638 These problems did NOT occur unless DomainKeys support was compiled.
640PH/23 Added daemon_startup_retries and daemon_startup_sleep.
642PH/24 Added ${if match_ip condition.
644PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
645 databases so that it will be absolutely obvious if a crash occurs in the
646 DB library. This is a regular occurrence (often caused by mis-matched
647 db.h files).
ff790e47 649PH/26 Insert a lot of missing (void) casts for functions such as chown(),
650 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
651 picked up on a user's system that detects such things. There doesn't seem
652 to be a gcc warning option for this - only an attribute that has to be
653 put on the function's prototype. It seems that in Fedora Core 4 they have
654 set this on a number of new functions. No doubt there will be more in due
655 course.
ff790e47 656
657PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
658 specify a transport. However, if an address that was verified by such a
659 router was the subject of a callout, Exim crashed because it tried to
660 read the rcpt_include_affixes from the non-existent transport. Now it
661 just assumes that the setting of that option is false. This bug was
662 introduced by 4.51/PH/31.
664PH/28 Changed -d+all to exclude +memory, because that information is very
665 rarely of interest, but it makes the output a lot bigger. People tend to
666 do -d+all out of habit.
668PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
669 code in os-type was giving problems when lives in lib64, like on
670 x86_64 Fedora Core.
672PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
673 aren't the modern standard, and it seems that some systems' include files
674 don't always have them. Exim was already checking for some of the newer
675 ones like T_AAAA, and defining it itself. I've added checks for all the
676 record types that Exim uses.
678PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
679 not automatically generating a new one, as it is supposed to. This
680 prevented TLS from working. If the file did exist, but contained invalid
681 data, a new version was generated, as expected. It was only the case of a
682 non-existent file that was broken.
684TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
685 with a change in libdomainkeys > 0.64.
687TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
688 from DNS. If the selector record carries the flag, it now has
689 precedence over the domain-wide flag.
691TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
693PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
694 the use of a port name that isn't defined in /etc/services) occurred, the
695 message was deferred as in a normal delivery, and thus remained on the
696 spool, instead of being failed because of the mua_wrapper setting. This
697 is now fixed, and I tidied up some of the mua_wrapper messages at the
698 same time.
700SC/08 Eximstats: whilst parsing the mainlog(s), store information about
701 the messages in a hash of arrays rather than using individual hashes.
702 This is a bit cleaner and results in dramatic memory savings, albeit
703 at a slight CPU cost.
705SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
706 as requested by Marc Sherman.
708SC/10 Eximstats: added histograms for user specified patterns as requested
709 by Marc Sherman.
711SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
713PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
714 fopen() in the content-scanning modules that did not already have it.
e7ad8a65 716
717Exim version 4.51
720TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
721 doc/experimental-spec.txt for details. (
2f079f46 723TK/02 Fix ACL "control" statement not being available in MIME ACL.
725TK/03 Fix ACL "regex" condition not being available in MIME ACL.
727PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
728 to test Sieve filters that use "vacation".
730PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
731 that changes the way the GnuTLS parameters are stored in the cache file.
732 The new format can be generated externally. For backward compatibility,
733 if the data in the cache doesn't make sense, Exim assumes it has read an
734 old-format file, and it generates new data and writes a new file. This
735 means that you can't go back to an older release without removing the
736 file.
738PH/03 A redirect router that has both "unseen" and "one_time" set does not
739 work if there are any delivery delays because "one_time" forces the
740 parent to be marked "delivered", so its unseen clone is never tried
741 again. For this reason, Exim now forbids the simultaneous setting of
742 these two options.
744PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
745 redirected to themselves ("homonym" addresses). Read the long ChangeLog
746 entry if you want to know the details. The fix, however, neglected to
747 consider the case when local delivery batching is involved. The test for
748 "previously delivered" was not happening when checking to see if an
749 address could be batched with a previous (undelivered) one; under
750 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 751 address.
753PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
754 in its include files, and this causes problems building Exim.
756PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
757 header_syntax) but Exim was just ignoring anything given after a slash.
758 In particular, this caused confusion with an attempt to use "verify =
759 reverse_host_lookup/defer_ok". An error is now given when options are
760 supplied for verify items that do not have them. (Maybe reverse_host_
761 lookup should have a defer_ok option, but that's a different point.)
763PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
764 defined by RFC 821) to 2048, because there were problems with some AUTH
765 commands, and RFC 1869 says the size should be increased for extended
766 SMTP commands that take arguments.
768PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
769 Finch).
771PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
772 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 773
774PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
775 an address' error message when a string expansion fails (syntax or
776 whatever). Otherwise the password may appear in the log. Following change
777 PH/42 below, there is no longer a chance of it appearing in a bounce
778 message.
49c2d5ea 779
780PH/11 Installed exipick version 20050225.0 from John Jetmore.
782PH/12 If the last host in a fallback_hosts list was multihomed, only the first
783 of its addresses was ever tried. (Bugzilla bug #2.)
785PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
786 the result incorrectly in the debug output. (It correctly added a newline
787 to what was transported.)
789TF/01 Added $received_time.
791PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
792 commented out examples of how to interface to a virus scanner and to
793 SpamAssassin. Also added commented examples of av_scanner and
794 spamd_address settings.
796PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
797 and controls are allowed in which ACLs. There were a couple of minor
798 errors. Some of the entries in the conditions table (which is a table of
799 where they are NOT allowed) were getting very unwieldy; rewrote them as a
800 negation of where the condition IS allowed.
802PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
804PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
805 header file does not have a version number, so I've had to invent a new
806 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
807 API. The code is untested by me (my Linux distribution still has 0.3.2 of
808 radiusclient), but it was contributed by a Radius user.
810PH/18 Installed Lars Mainka's patch for the support of CRL collections in
811 files or directories, for OpenSSL.
813PH/19 When an Exim process that is running as root has to create an Exim log
814 file, it does so in a subprocess that runs as exim:exim so as to get the
815 ownership right at creation (otherwise, other Exim processes might see
816 the file with the wrong ownership). There was no test for failure of this
817 fork() call, which would lead to the process getting stuck as it waited
818 for a non-existent subprocess. Forks do occasionally fail when resources
819 run out. I reviewed all the other calls to fork(); they all seem to check
820 for failure.
822PH/20 When checking for unexpected SMTP input at connect time (before writing
823 the banner), Exim was not dealing correctly with a non-positive return
824 from the read() function. If the client had disconnected by this time,
825 the result was a log entry for a synchronization error with an empty
826 string after "input=" when read() returned zero. If read() returned -1
827 (an event I could not check), uninitialized data bytes were printed.
828 There were reports of junk text (parts of files, etc) appearing after
829 "input=".
831PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
833PH/22 Added support for macro redefinition, and (re)definition in between
834 driver and ACL definitions.
836PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
837 forgetting to use the resulting value; it was using the unexpanded value.
839PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
840 hadn't been configured. The fix is from Juergen Kreileder, who
841 understands it better than I do:
843 "Here's what I see happening with three configured cyrus_sasl
844 authenticators configured (plain, login, cram-md5):
846 On startup auth_cyrus_sasl_init() gets called for each of these.
847 This means three calls to sasl_listmech() without a specified mech_list.
848 => SASL tests which mechs of all available mechs actually work
849 => three warnings about OTP not working
850 => the returned list contains: plain, login, cram-md5, digest-md5, ...
852 With the patch, sasl_listmech() also gets called three times. But now
853 SASL's mech_list option is set to the server_mech specified in the the
854 authenticator. Or in other words, the answer from sasl_listmech()
855 gets limited to just the mech you're testing for (which is different
856 for each call.)
857 => the return list contains just 'plain' or 'login', 'cram-md5' or
858 nothing depending on the value of ob->server_mech.
860 I've just tested the patch: Authentication still works fine,
861 unavailable mechs specified in the exim configuration are still
862 caught, and the auth.log warnings about OTP are gone."
864PH/25 When debugging is enabled, the contents of the command line are added
865 to the debugging output, even when log_selector=+arguments is not
866 specified.
868PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
869 answer is "GNU", and only if the return is "GNU/something" is the answer
870 "Linux".
872PH/27 $acl_verify_message is now set immediately after the failure of a
873 verification in an ACL, and so is available in subsequent modifiers. In
874 particular, the message can be preserved by coding like this:
876 warn !verify = sender
877 set acl_m0 = $acl_verify_message
879 Previously, $acl_verify_message was set only while expanding "message"
880 and "log_message" when a very denied access.
882PH/28 Modified OS/os.c-Linux with
884 -#ifndef OS_LOAD_AVERAGE
885 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
887 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
888 nomenclature these days.)
890PH/29 Installed patch from the Sieve maintainer that adds the options
891 sieve_useraddress and sieve_subaddress to the redirect router.
893PH/30 In these circumstances:
894 . Two addresses routed to the same list of hosts;
895 . First host does not offer TLS;
896 . First host accepts first address;
897 . First host gives temporary error to second address;
898 . Second host offers TLS and a TLS session is established;
899 . Second host accepts second address.
900 Exim incorrectly logged both deliveries with the TLS parameters (cipher
901 and peerdn, if requested) that were in fact used only for the second
902 address.
7e8bec7a 903
904PH/31 When doing a callout as part of verifying an address, Exim was not paying
905 attention to any local part prefix or suffix that was matched by the
906 router that accepted the address. It now behaves in the same way as it
907 does for delivery: the affixes are removed from the local part unless
908 rcpt_include_affixes is set on the transport.
910PH/32 Add the sender address, as F=<...>, to the log line when logging a
911 timeout during the DATA phase of an incoming message.
913PH/33 Sieve envelope tests were broken for match types other than :is. I have
914 applied a patch sanctioned by the Sieve maintainer.
c688b954 915
916PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
917 the uid or gid is negative. A case of a negative gid caused this to be
918 noticed. The fix allows for either to be negative.
920PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
921 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
922 overlooked.
924PH/36 The change PH/12 above was broken. Fixed it.
926PH/37 Exim used to check for duplicate addresses in the middle of routing, on
927 the grounds that routing the same address twice would always produce the
928 same answer. This might have been true once, but it is certainly no
929 longer true now. Routing a child address may depend on the previous
930 routing that produced that child. Some complicated redirection strategies
931 went wrong when messages had multiple recipients, and made Exim's
932 behaviour dependent on the order in which the addresses were given.
934 I have moved the duplicate checking until after the routing is complete.
935 Exim scans the addresses that are assigned to local and remote
936 transports, and removes any duplicates. This means that more work will be
937 done, as duplicates will always all be routed, but duplicates are
938 presumably rare, so I don't expect this is of any significance.
940 For deliveries to pipes, files, and autoreplies, the duplicate checking
941 still happens during the routing process, since they are not going to be
942 routed further.
944PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
945 It corrects a timeout issue with spamd. This is Ian's comment: "The
946 background is that sometimes spamd either never reads data from a
947 connection it has accepted, or it never writes response data. The exiscan
948 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
949 blindly assumes that writes won't block so it may never time out."
951PH/39 Allow G after quota size as well as K and M.
953PH/40 The value set for $authenticated_id in an authenticator may not contain
954 binary zeroes or newlines because the value is written to log lines and
955 to spool files. There was no check on this. Now the value is run through
956 the string_printing() function so that such characters are converted to
957 printable escape sequences.
959PH/41 $message_linecount is a new variable that contains the total number of
960 lines in the message. Compare $body_linecount, which is the count for the
961 body only.
963PH/42 Exim no longer gives details of delivery errors for specific addresses in
964 bounce and delay warning messages, except in certain special cases, which
965 are as follows:
967 (a) An SMTP error message from a remote host;
968 (b) A message specified in a :fail: redirection;
969 (c) A message specified in a "fail" command in a system filter;
970 (d) A message specified in a FAIL return from the queryprogram router;
971 (e) A message specified by the cannot_route_message router option.
973 In these cases only, Exim does include the error details in bounce and
974 warning messages. There are also a few cases where bland messages such
975 as "unrouteable address" or "local delivery error" are given.
977PH/43 $value is now also set for the "else" part of a ${run expansion.
979PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
980 being worked on, but at least Exim now implements the latest version to
981 play with."
983PH/45 In a pipe transport, although a timeout while waiting for the pipe
984 process to complete was treated as a delivery failure, a timeout while
985 writing the message to the pipe was logged, but erroneously treated as a
986 successful delivery. Such timeouts include transport filter timeouts. For
987 consistency with the overall process timeout, these timeouts are now
988 treated as errors, giving rise to delivery failures by default. However,
989 there is now a new Boolean option for the pipe transport called
990 timeout_defer, which, if set TRUE, converts the failures into defers for
991 both kinds of timeout. A transport filter timeout is now identified in
992 the log output.
994PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
995 systems where "make" and "gmake" are different, calling "gmake" at top
996 level broke things. I've arranged for the value of $(MAKE) to be passed
997 from the Makefile to this script so that it can call the same version of
998 "make".
7982096b 1000
1001A note about Exim versions 4.44 and 4.50
1004Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1005changes of various kinds. As a consequence, a big documentation update was
1006needed. This delayed the release for rather longer than seemed good, especially
1007in the light of a couple of (minor) security issues. Therefore, the changes
1008that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1009release. So 4.44 and 4.50 are in effect two different branches that both start
1010from 4.43.
1012I have left the 4.50 change log unchanged; it contains all the changes since
10134.43. The change log for 4.44 is below; many of its items are identical to
1014those for 4.50. This seems to be the most sensible way to preserve the
1015historical information.
f7b63901 1018Exim version 4.50
1021 1. Minor wording change to the doc/README.SIEVE file.
139059f6 1023 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1024 computation of the current number of files was incorrect.
495ae4b0 1025
1026 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1027 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1028 place.
1030 4. Give more explanation in the error message when the command for a transport
1031 filter fails to execute.
1033 5. There are several places where Exim runs a non-Exim command in a
1034 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1035 was being done only for the command run by the queryprogram router. It is
1036 now done for all such subprocesses. The other cases are: ${run, transport
1037 filters, and the commands run by the lmtp and pipe transports.
1039 6. Added CONFIGURE_GROUP build-time option.
1041 7. Some older OS have a limit of 256 on the maximum number of file
1042 descriptors. Exim was using setrlimit() to set 1000 as a large value
1043 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1044 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1045
1046 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1047 was an oversight, and furthermore, ever since the addition of extra
1048 controls (e.g. 4.43/32), the checks on when to allow different forms of
1049 "control" were broken. There should now be diagnostics for all cases when a
1050 control that does not make sense is encountered.
1052 9. Added the /retain_sender option to "control=submission".
105410. $recipients is now available in the predata ACL (oversight).
105611. Tidy the search cache before the fork to do a delivery from a message
1057 received from the command line. Otherwise the child will trigger a lookup
1058 failure and thereby defer the delivery if it tries to use (for example) a
1059 cached ldap connection that the parent has called unbind on.
106112. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1062 of $address_data from the recipient verification was clobbered by the
1063 sender verification.
106513. The value of address_data from a sender verification is now available in
1066 $sender_address_data in subsequent conditions in the ACL statement.
106814. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
107015. Added a new option "connect=<time>" to callout options, to set a different
1071 connection timeout.
107316. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1074 was its contents. (It was OK if the option was not defined at all.)
107617. A "Completed" log line is now written for messages that are removed from
1077 the spool by the -Mrm option.
107918. New variables $sender_verify_failure and $recipient_verify_failure contain
1080 information about exactly what failed.
108219. Added -dd to debug only the daemon process.
108420. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1085 handles timeouts, both on the server side and network timeouts. Renamed the
1086 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
108821. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1089 It is now set to "smtps".
109122. $host_address is now set to the target address during the checking of
1092 ignore_target_hosts.
109423. When checking ignore_target_hosts for an ipliteral router, no host name was
1095 being passed; this would have caused $sender_host_name to have been used if
1096 matching the list had actually called for a host name (not very likely,
1097 since this list is usually IP addresses). A host name is now passed as
1098 "[x.x.x.x]".
110024. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1101 code that specifies a non-restarting handler (typically sigaction() in
1102 modern systems) in an attempt to fix a rare and obscure crash bug.
110425. Narrowed the window for a race in the daemon that could cause it to ignore
1105 SIGCHLD signals. This is not a major problem, because they are used only to
1106 wake it up if nothing else does.
110826. A malformed maildirsize file could cause Exim to calculate negative values
1109 for the mailbox size or file count. Odd effects could occur as a result.
1110 The maildirsize information is now recalculated if the size or filecount
1111 end up negative.
111327. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1114 support for a long time. Removed HAVE_SYS_VFS_H.
111628. Installed the latest version of exipick from John Jetmore.
111829. In an address list, if the pattern was not a regular expression, an empty
1119 subject address (from a bounce message) matched only if the pattern was an
1120 empty string. Non-empty patterns were not even tested. This was the wrong
1121 because it is perfectly reasonable to use an empty address as part of a
1122 database query. An empty address is now tested by patterns that are
1123 lookups. However, all the other forms of pattern expect the subject to
1124 contain a local part and a domain, and therefore, for them, an empty
1125 address still always fails if the pattern is not itself empty.
112730. Exim went into a mad DNS loop when attempting to do a callout where the
1128 host was specified on an smtp transport, and looking it up yielded more
1129 than one IP address.
113131. Re-factored the code for checking spool and log partition space into a
1132 function that finds that data and another that does the check. The former
1133 is then used to implement four new variables: $spool_space, $log_space,
1134 $spool_inodes, and $log_inodes.
113632. The RFC2047 encoding function was originally intended for short strings
1137 such as real names; it was not keeping to the 75-character limit for
1138 encoded words that the RFC imposes. It now respects the limit, and
1139 generates multiple encoded words if necessary. To be on the safe side, I
1140 have increased the buffer size for the ${rfc2047: expansion operator from
1141 1024 to 2048 bytes.
114333. It is now permitted to omit both strings after an "if" condition; if the
1144 condition is true, the result is "true". As before, when the second string
1145 is omitted, a false condition yields an empty string. This makes it less
1146 cumbersome to write custom ACL and router conditions.
114834. Failure to deliver a bounce message always caused it to be frozen, even if
1149 there was an errors_to setting on the router. The errors_to setting is now
1150 respected.
115235. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1153 canonical form (fully expanded) before being placed in
1154 $sender_host_address.
115636. The table in the code that translates DNS record types into text (T_A to
1157 "A" for instance) was missing entries for NS and CNAME. It is just possible
1158 that this could have caused confusion if both these types were looked up
1159 for the same domain, because the text type is used as part of Exim's
1160 per-process caching. But the chance of anyone hitting this buglet seems
1161 very small.
116337. The dnsdb lookup has been extended in a number of ways.
1165 (1) There is a new type, "zns", which walks up the domain tree until it
1166 finds some nameserver records. It should be used with care.
1168 (2) There is a new type, "mxh", which is like "mx" except that it returns
1169 just the host names, not the priorities.
1171 (3) It is now possible to give a list of domains (or IP addresses) to be
1172 looked up. The behaviour when one of the lookups defers can be
1173 controlled by a keyword.
7bb56e1f 1174
ea3bc19b 1175 (4) It is now possible to specify the separator character for use when
7bb56e1f 1176 multiple records are returned.
33397d19 1177
117838. The dnslists ACL condition has been extended: it is now possible to supply
1179 a list of IP addresses and/or domains to be looked up in a particular DNS
1180 domain.
118239. Added log_selector=+queue_time_overall.
118440. When running the queue in the test harness, wait just a tad after forking a
1185 delivery process, to get repeatability of debugging output.
118741. Include certificate and key file names in error message when GnuTLS fails
1188 to set them up, because the GnuTLS error message doesn't include the name
1189 of the failing file when there is a problem reading it.
119142. Allow both -bf and -bF in the same test run.
119343. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
119544. The "Exiscan patch" is now merged into the mainline Exim source.
119745. Sometimes the final signoff response after QUIT could fail to get
1198 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1199 < 0 before doing a fflush(). This bug looks as though it goes back to the
1200 introduction of TLS in release 3.20, but "sometimes" must have been rare
1201 because the tests only now provoked it.
120346. Reset the locale to "C" after calling embedded Perl, in case it was changed
1204 (this can affect the format of dates).
120647. exim_tidydb, when checking for the continued existence of a message for
1207 which it has found a message-specific retry record, was not finding
1208 messages that were in split spool directories. Consequently, it was
1209 deleting retry records that should have stayed in existence.
121148. Steve fixed some bugs in eximstats.
121349. The SPA authentication driver was not abandoning authentication and moving
1214 on to the next authenticator when an expansion was forced to fail,
1215 contradicting the general specification for all authenticators. Instead it
1216 was generating a temporary error. It now behaves as specified.
121850. The default ordering of permitted cipher suites for GnuTLS was pessimal
1219 (the order specifies the preference for clients). The order is now AES256,
1220 AES128, 3DES, ARCFOUR128.
122251. Small patch to Sieve code - explicitly set From: when generating an
1223 autoreply.
122552. Exim crashed if a remote delivery caused a very long error message to be
1226 recorded - for instance if somebody sent an entire SpamAssassin report back
1227 as a large number of 550 error lines. This bug was coincidentally fixed by
1228 increasing the size of one of Exim's internal buffers (big_buffer) that
1229 happened as part of the Exiscan merge. However, to be on the safe side, I
1230 have made the code more robust (and fixed the comments that describe what
1231 is going on).
123353. Now that there can be additional text after "Completed" in log lines (if
1234 the queue_time_overall log selector is set), a one-byte patch to exigrep
1235 was needed to allow it to recognize "Completed" as not the last thing in
1236 the line.
123854. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1239 patch that reportedly fixes this has been added. I am not expert enough to
1240 create a test for it. This is what the patch creator wrote:
1242 "I found a little strange behaviour of ldap code when working with
1243 Windows 2003 AD Domain, where users was placed in more than one
1244 Organization Units. When I tried to give exim partial DN, the exit code
1245 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1246 But simultaneously result of request was absolutely normal ldap result,
1247 so I produce this patch..."
1249 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1250 REFERENCE, so I have modified the code to exclude the patch when that macro
1251 is not defined.
125355. Some experimental protocols are using DNS PTR records for new purposes. The
1254 keys for these records are domain names, not reversed IP addresses. The
1255 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1256 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1257 CAN-2005-0021
7102e136 1258
125956. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
126157. Double the size of the debug message buffer (to 2048) so that more of very
1262 long debug lines gets shown.
126458. The exicyclog utility now does better if the number of log files to keep
1265 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
126759. Two changes related to the smtp_active_hostname option:
1269 (1) $smtp_active_hostname is now available as a variable.
1270 (2) The default for smtp_banner uses $smtp_active_hostname instead
1271 of $primary_hostname.
127360. The host_aton() function is supposed to be passed a string that is known
1274 to be a valid IP address. However, in the case of IPv6 addresses, it was
1275 not checking this. This is a hostage to fortune. Exim now panics and dies
1276 if the condition is not met. A case was found where this could be provoked
1277 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1278 components; fortuitously, this particular loophole had already been fixed
1279 by change 4.50/55 above.
1281 If there are any other similar loopholes, the new check in host_aton()
1282 itself should stop them being exploited. The report I received stated that
1283 data on the command line could provoke the exploit when Exim was running as
1284 exim, but did not say which command line option was involved. All I could
1285 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1286 running as the user.
ea3a6f44 1287 CAN-2005-0021
128961. There was a buffer overflow vulnerability in the SPA authentication code
1290 (which came originally from the Samba project). I have added a test to the
1291 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1292 CAN-2005-0022
b975ba52 1293
129462. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1295 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
129763. The daemon start-up calls getloadavg() while still root for those OS that
1298 need the first call to be done as root, but it missed one case: when
1299 deliver_queue_load_max is set with deliver_drop_privilege. This is
1300 necessary for the benefit of the queue runner, because there is no re-exec
1301 when deliver_drop_privilege is set.
130364. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1304 This has been fixed.
130665. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1307 was in use, was not putting the data itself into the right store pool;
1308 consequently, it could be overwritten for a subsequent message in the same
1309 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1310 the caching.)
131266. Added hosts_max_try_hardlimit to the smtp transport, default 50.
131467. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1315 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1316 the function were treating the return as a boolean value, which happened to
1317 work because 0=false and not-0=true, but is not correct code.
131968. The host_aton() function was not handling scoped IPv6 addresses (those
1320 with, for example, "%eth0" on the end) correctly.
132269. Fixed some compiler warnings in acl.c for the bitmaps specified with
1323 negated items (that is, ~something) in unsigned ints. Some compilers
1324 apparently mutter when there is no cast.
132670. If an address verification called from an ACL failed, and did not produce a
1327 user-specific message (i.e. there was only a "system" message), nothing was
1328 put in $acl_verify_message. In this situation, it now puts the system
1329 message there.
133171. Change 4.23/11 added synchronization checking at the start of an SMTP
1332 session; change 4.31/43 added the unwanted input to the log line - except
1333 that it did not do this in the start of session case. It now does.
133572. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1336 This is wrong and can cause the other end to generate a synchronization
1337 error if it is another Exim or anything else that does the synchronization
1338 check. A QUIT command is no longer sent after a timeout.
134073. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1341 during host lookups.
134374. The defer_ok option of callout verification was not working if it was used
1344 when verifying addresses in header lines, that is, for this case:
1346 verify = header_sender/callout=defer_ok
134875. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1349 those file descriptors could be used for SMTP connections. If anything
1350 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1351 could be sent to the SMTP client, causing chaos. The daemon now opens
1352 stdin, stdout, and stderr to /dev/null when it puts itself into the
1353 background.
135576. Arrange for output from Perl's "warn" command to be written to Exim's main
1356 log by default. The user can override this with suitable Perl magic.
135877. The use of log_message on a "discard" ACL verb, which is supposed to add to
1359 the log message when discard triggers, was not working for the DATA ACL or
1360 for the non-SMTP ACL.
136278. Error message wording change in sieve.c.
136479. If smtp_accept_max_per_host was set, the number of connections could be
1365 restricted to fewer than expected, because the daemon was trying to set up
1366 a new connection before checking whether the processes handling previous
1367 connections had finished. The check for completed processes is now done
1368 earlier. On busy systems, this bug wouldn't be noticed because something
1369 else would have woken the daemon, and it would have reaped the completed
1370 process earlier.
137280. If a message was submitted locally by a user whose login name contained one
1373 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1374 It caused a spool format error. I have fixed the spool reading code. A
1375 related problem was that the "from" clause in the Received: line became
1376 illegal because of the space(s). It is now covered by ${quote_local_part.
137881. Included the latest eximstats from Steve (adds average sizes to HTML Top
1379 tables).
138182. Updated OS/Makefile-AIX as per message from Mike Meredith.
138383. Patch from Sieve maintainer to fix unterminated string problem in
1384 "vacation" handling.
138684. Some minor changes to the Linux configuration files to help with other
1387 OS variants using glibc.
138985. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 1391
1393See the note above about the 4.44 and 4.50 releases.
1397Exim version 4.44
1400 1. Change 4.43/35 introduced a bug that caused file counts to be
1401 incorrectly computed when quota_filecount was set in an appendfile
1402 transport
1404 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1405 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1406 place.
1408 3. Give more explanation in the error message when the command for a transport
1409 filter fails to execute.
1411 4. There are several places where Exim runs a non-Exim command in a
1412 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1413 was being done only for the command run by the queryprogram router. It is
1414 now done for all such subprocesses. The other cases are: ${run, transport
1415 filters, and the commands run by the lmtp and pipe transports.
1417 5. Some older OS have a limit of 256 on the maximum number of file
1418 descriptors. Exim was using setrlimit() to set 1000 as a large value
1419 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1420 systems. I've change it so that if it can't get 1000, it tries for 256.
1422 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1423 was an oversight, and furthermore, ever since the addition of extra
1424 controls (e.g. 4.43/32), the checks on when to allow different forms of
1425 "control" were broken. There should now be diagnostics for all cases when a
1426 control that does not make sense is encountered.
1428 7. $recipients is now available in the predata ACL (oversight).
1430 8. Tidy the search cache before the fork to do a delivery from a message
1431 received from the command line. Otherwise the child will trigger a lookup
1432 failure and thereby defer the delivery if it tries to use (for example) a
1433 cached ldap connection that the parent has called unbind on.
1435 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1436 of $address_data from the recipient verification was clobbered by the
1437 sender verification.
143910. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1440 was its contents. (It was OK if the option was not defined at all.)
144211. A "Completed" log line is now written for messages that are removed from
1443 the spool by the -Mrm option.
144512. $host_address is now set to the target address during the checking of
1446 ignore_target_hosts.
144813. When checking ignore_target_hosts for an ipliteral router, no host name was
1449 being passed; this would have caused $sender_host_name to have been used if
1450 matching the list had actually called for a host name (not very likely,
1451 since this list is usually IP addresses). A host name is now passed as
1452 "[x.x.x.x]".
145414. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1455 code that specifies a non-restarting handler (typically sigaction() in
1456 modern systems) in an attempt to fix a rare and obscure crash bug.
145815. Narrowed the window for a race in the daemon that could cause it to ignore
1459 SIGCHLD signals. This is not a major problem, because they are used only to
1460 wake it up if nothing else does.
146216. A malformed maildirsize file could cause Exim to calculate negative values
1463 for the mailbox size or file count. Odd effects could occur as a result.
1464 The maildirsize information is now recalculated if the size or filecount
1465 end up negative.
146717. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1468 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 147018. Updated exipick to current release from John Jetmore.
147219. Allow an empty sender to be matched against a lookup in an address list.
1473 Previously the only cases considered were a regular expression, or an
1474 empty pattern.
147620. Exim went into a mad DNS lookup loop when doing a callout where the
1477 host was specified on the transport, if the DNS lookup yielded more than
1478 one IP address.
148021. The RFC2047 encoding function was originally intended for short strings
1481 such as real names; it was not keeping to the 75-character limit for
1482 encoded words that the RFC imposes. It now respects the limit, and
1483 generates multiple encoded words if necessary. To be on the safe side, I
1484 have increased the buffer size for the ${rfc2047: expansion operator from
1485 1024 to 2048 bytes.
bbe902f0 1486
148722. Failure to deliver a bounce message always caused it to be frozen, even if
1488 there was an errors_to setting on the router. The errors_to setting is now
1489 respected.
149123. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1492 canonical form (fully expanded) before being placed in
1493 $sender_host_address.
149524. Updated eximstats to version 1.33
149725. Include certificate and key file names in error message when GnuTLS fails
1498 to set them up, because the GnuTLS error message doesn't include the name
1499 of the failing file when there is a problem reading it.
150126. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1502 As per change 25.
bbe902f0 1503
150427. Reset the locale to "C" after calling embedded Perl, in case it was changed
1505 (this can affect the format of dates).
bbe902f0 1506
150728. exim_tidydb, when checking for the continued existence of a message for
1508 which it has found a message-specific retry record, was not finding
1509 messages that were in split spool directories. Consequently, it was
1510 deleting retry records that should have stayed in existence.
151229. eximstats updated to version 1.35
1513 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1514 1.35 - bugfix such that pie charts by volume are generated correctly
151630. The SPA authentication driver was not abandoning authentication and moving
1517 on to the next authenticator when an expansion was forced to fail,
1518 contradicting the general specification for all authenticators. Instead it
1519 was generating a temporary error. It now behaves as specified.
bbe902f0 1520
152131. The default ordering of permitted cipher suites for GnuTLS was pessimal
1522 (the order specifies the preference for clients). The order is now AES256,
1523 AES128, 3DES, ARCFOUR128.
bbe902f0 1524
152531. Small patch to Sieve code - explicitly set From: when generating an
1526 autoreply.
bbe902f0 1527
152832. Exim crashed if a remote delivery caused a very long error message to be
1529 recorded - for instance if somebody sent an entire SpamAssassin report back
1530 as a large number of 550 error lines. This bug was coincidentally fixed by
1531 increasing the size of one of Exim's internal buffers (big_buffer) that
1532 happened as part of the Exiscan merge. However, to be on the safe side, I
1533 have made the code more robust (and fixed the comments that describe what
1534 is going on).
bbe902f0 1535
153633. Some experimental protocols are using DNS PTR records for new purposes. The
1537 keys for these records are domain names, not reversed IP addresses. The
1538 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1539 leaves it alone. Component reversal etc. now happens only for IP addresses.
1540 CAN-2005-0021
154234. The host_aton() function is supposed to be passed a string that is known
1543 to be a valid IP address. However, in the case of IPv6 addresses, it was
1544 not checking this. This is a hostage to fortune. Exim now panics and dies
1545 if the condition is not met. A case was found where this could be provoked
1546 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1547 components; fortuitously, this particular loophole had already been fixed
1548 by change 4.50/55 or 4.44/33 above.
1550 If there are any other similar loopholes, the new check in host_aton()
1551 itself should stop them being exploited. The report I received stated that
1552 data on the command line could provoke the exploit when Exim was running as
1553 exim, but did not say which command line option was involved. All I could
1554 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1555 running as the user.
1556 CAN-2005-0021
155835. There was a buffer overflow vulnerability in the SPA authentication code
1559 (which came originally from the Samba project). I have added a test to the
1560 spa_base64_to_bits() function which I hope fixes it.
1561 CAN-2005-0022
156336. The daemon start-up calls getloadavg() while still root for those OS that
1564 need the first call to be done as root, but it missed one case: when
1565 deliver_queue_load_max is set with deliver_drop_privilege. This is
1566 necessary for the benefit of the queue runner, because there is no re-exec
1567 when deliver_drop_privilege is set.
bbe902f0 1568
156937. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1570 was in use, was not putting the data itself into the right store pool;
1571 consequently, it could be overwritten for a subsequent message in the same
1572 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1573 the caching.)
bbe902f0 1574
157538. Sometimes the final signoff response after QUIT could fail to get
1576 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1577 < 0 before doing a fflush(). This bug looks as though it goes back to the
1578 introduction of TLS in release 3.20, but "sometimes" must have been rare
1579 because the tests only now provoked it.
1582Exim version 4.43
1585 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1586 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1587 Now it returns an integer. A number of calls were still expecting a T/F
1588 return. Fortuitously, in all cases, the tests worked in OK situations,
1589 which is the norm. However, things would have gone wrong on any write
1590 failures on the smtp file descriptor. This function is used when sending
1591 messages over SMTP and also when doing verify callouts.
1593 2. When Exim is called to do synchronous delivery of a locally submitted
1594 message (the -odf or -odi options), it no longer closes stderr before doing
1595 the delivery.
1597 3. Implemented the mua_wrapper option.
1599 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1601 5. Implemented the functions header_remove(), header_testname(),
1602 header_add_at_position(), and receive_remove_recipient(), and exported them
1603 to local_scan().
1605 6. If an ACL "warn" statement specified the addition of headers, Exim already
1606 inserted X-ACL-Warn: at the start if there was no header name. However, it
1607 was not making this test for the second and subsequent header lines if
1608 there were newlines in the string. This meant that an invalid header could
1609 be inserted if Exim was badly configured.
1611 7. Allow an ACL "warn" statement to add header lines at the start or after all
1612 the Received: headers, as well as at the end.
1614 8. Added the rcpt_4xx retry error code.
1616 9. Added postmaster_mailfrom=xxx to callout verification option.
161810. Added mailfrom=xxxx to the callout verification option, for verify=
1619 header_sender only.
162111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1622 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
162412. Inserted some casts to stop certain compilers warning when using pointer
1625 differences as field lengths or precisions in printf-type calls (mostly
1626 affecting debugging statements).
162813. Added optional readline() support for -be (dynamically loaded).
163014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1631 same clock tick as a message's arrival, so that its received time was the
1632 same as the "first fail" time on the retry record, and that message
1633 remained on the queue past the ultimate address timeout, every queue runner
1634 would try a delivery (because it was past the ultimate address timeout) but
1635 after another failure, the ultimate address timeout, which should have then
1636 bounced the address, did not kick in. This was a "< instead of <=" error;
1637 in most cases the first failure would have been in the next clock tick
1638 after the received time, and all would be well.
164015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1641 being recognized when the domain list was tested by the match_domain
1642 condition in an expansion string.
164416. Added the ${str2b64: operator.
164617. Exim was always calling setrlimit() to set a large limit for the number of
1647 processes, without checking whether the existing limit was already
1648 adequate. (It did check for the limit on file descriptors.) Furthermore,
1649 errors from getrlimit() and setrlimit() were being ignored. Now they are
1650 logged to the main and panic logs, but Exim does carry on, to try to do its
1651 job under whatever limits there are.
165318. Imported PCRE 5.0.
165519. Trivial typo in log message " temporarily refused connection" (the leading
1656 space).
165820. If the log selector return_path_on_delivery was set and an address was
1659 redirected to /dev/null, the delivery process crashed because it assumed
1660 that a return path would always be set for a "successful" delivery. In this
1661 case, the whole delivery is bypassed as an optimization, and therefore no
1662 return path is set.
166421. Internal re-arrangement: the function for sending a challenge and reading
1665 a response while authentication was assuming a zero-terminated challenge
1666 string. It's now changed to take a pointer and a length, to allow for
1667 binary data in such strings.
166922. Added the cyrus_sasl authenticator (code supplied by MBM).
167123. Exim was not respecting finduser_retries when seeking the login of the
1672 uid under which it was called; it was always trying 10 times. (The default
1673 setting of finduser_retries is zero.) Also, it was sleeping after the final
1674 failure, which is pointless.
167624. Implemented tls_on_connect_ports.
167825. Implemented acl_smtp_predata.
168026. If the domain in control=submission is set empty, Exim assumes that the
1681 authenticated id is a complete email address when it generates From: or
1682 Sender: header lines.
168427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1685 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1686 chown and chgrp in /bin and hostname in /usr/bin.
168828. Exim was keeping the "process log" file open after each use, just as it
1689 does for the main log. This opens the possibility of it remaining open for
1690 long periods when the USR1 signal hits a daemon. Occasional processlog
1691 errors were reported, that could have been caused by this. Anyway, it seems
1692 much more sensible not to leave this file open at all, so that is what now
1693 happens.
169529. The long-running daemon process does not normally write to the log once it
1696 has entered its main loop, and it closes the log before doing so. This is
1697 so that log files can straightforwardly be renamed and moved. However,
1698 there are a couple of unusual error situations where the daemon does write
1699 log entries, and I had neglected to close the log afterwards.
170130. The text of an SMTP error response that was received during a remote
1702 delivery was being truncated at 512 bytes. This is too short for some of
1703 the long messages that one sometimes sees. I've increased the limit to
1704 1024.
170631. It is now possible to make retry rules that apply only when a message has a
1707 specific sender, in particular, an empty sender.
170932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1710 it possible to be selective about when SMTP synchronization is enforced.
171233. Added "control = caseful_local_part" and "control = "caselower_local_part".
171432. Implemented hosts_connection_nolog.
171633. Added an ACL for QUIT.
171834. Setting "delay_warning=" to disable warnings was not working; it gave a
1719 syntax error.
172135. Added mailbox_size and mailbox_filecount to appendfile.
172336. Added control = no_multiline_responses to ACLs.
172537. There was a bug in the logic of the code that waits for the clock to tick
1726 in the case where the clock went backwards by a substantial amount such
1727 that the microsecond fraction of "now" was more than the microsecond
1728 fraction of "then" (but the whole seconds number was less).
173038. Added support for the libradius Radius client library this is found on
1731 FreeBSD (previously only the radiusclient library was supported).
1734Exim version 4.42
1737 1. When certain lookups returned multiple values in the form name=value, the
1738 quoting of the values was not always being done properly. Specifically:
1739 (a) If the value started with a double quote, but contained no whitespace,
1740 it was not quoted.
1741 (b) If the value contained whitespace other than a space character (i.e.
1742 tabs or newlines or carriage returns) it was not quoted.
1743 This fix has been applied to the mysql and pgsql lookups by writing a
1744 separate quoting function and calling it from the lookup code. The fix
1745 should probably also be applied to nisplus, ibase and oracle lookups, but
1746 since I cannot test any of those, I have not disturbed their existing code.
1748 2. A hit in the callout cache for a specific address caused a log line with no
1749 reason for rejecting RCPT. Now it says "Previous (cached) callout
1750 verification failure".
1752 3. There was an off-by-one bug in the queryprogram router. An over-long
1753 return line was truncated at 256 instead of 255 characters, thereby
1754 overflowing its buffer with the terminating zero. As well as fixing this, I
1755 have increased the buffer size to 1024 (and made a note to document this).
1757 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1758 when Exim is waiting for an SMTP response from a remote server, Exim
1759 restarts its select() call on the socket, thereby resetting its timeout.
1760 This is not a problem when such interrupts are rare. Somebody set up a cron
1761 job to run exiwhat every 2 minutes, which is less than the normal select()
1762 timeout (5 or 10 minutes). This meant that the select() timeout never
1763 kicked in because it was always reset. I have fixed this by comparing the
1764 time when an interrupt arrives with the time at the start of the first call
1765 to select(). If more time than the timeout has elapsed, the interrupt is
1766 treated as a timeout.
1768 5. Some internal re-factoring in preparation for the addition of Sieve
1769 extensions (by MH). In particular, the "personal" test is moved to a
1770 separate function, and given an option for scanning Cc: and Bcc: (which is
1771 not set for Exim filters).
1773 6. When Exim created an email address using the login of the caller as the
1774 local part (e.g. when creating a From: or Sender: header line), it was not
1775 quoting the local part when it contained special characters such as @.
1777 7. Installed new OpenBSD configuration files.
1779 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1780 try to make them clearer.
1782 9. Callout options, other than the timeout value, were being ignored when
1783 verifying sender addresses in header lines. For example, when using
1785 verify = header_sender/callout=no_cache
1787 the cache was (incorrectly) being used.
178910. Added a missing instance of ${EXE} to the exim_install script; this affects
1790 only the Cygwin environment.
179211. When return_path_on_delivery was set as a log selector, if different remote
1793 addresses in the same message used different return paths and parallel
1794 remote delivery occurred, the wrong values would sometimes be logged.
1795 (Whenever a remote delivery process finished, the return path value from
1796 the most recently started remote delivery process was logged.)
179812. RFC 3848 specifies standard names for the "with" phrase in Received: header
1799 lines when AUTH and/or TLS are in use. This is the "received protocol"
1800 field. Exim used to use "asmtp" for authenticated SMTP, without any
1801 indication (in the protocol name) for TLS use. Now it follows the RFC and
1802 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1803 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1804 names appear in log lines as well as in Received: header lines.
180613. Installed MH's patches for Sieve to add the "copy" and "vacation"
1807 extensions, and comparison tests, and to fix some bugs.
180914. Changes to the "personal" filter test:
1811 (1) The test was buggy in that it was just doing the equivalent of
1812 "contains" tests on header lines. For example, if a user's address was
1813 anne@some.where, the "personal" test would incorrectly be true for
1815 To: susanne@some.where
1817 This test is now done by extracting each address from the header in turn,
1818 and checking the entire address. Other tests that are part of "personal"
1819 are now done using regular expressions (for example, to check local parts
1820 of addresses in From: header lines).
1822 (2) The list of non-personal local parts in From: addresses has been
1823 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1824 taken from the Sieve specification recommendations.
1826 (3) If the message contains any header line starting with "List-" it is
1827 treated as non-personal.
1829 (4) The test for "circular" in the Subject: header line has been removed
1830 because it now seems ill-conceived.
183215. Minor typos in src/EDITME comments corrected.
183416. Installed latest exipick from John Jetmore.
183617. If headers_add on a router specified a text string that was too long for
1837 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1838 of string_sprintf() is now avoided.
184018. $message_body_size was not set (it was always zero) when running the DATA
1841 ACL and the local_scan() function.
184319. For the "mail" command in an Exim filter, no default was being set for
1844 the once_repeat time, causing a random time value to be used if "once" was
1845 specified. (If the value happened to be <= 0, no repeat happened.) The
1846 default is now 0s, meaning "never repeat". The "vacation" command was OK
1847 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1848 (I found it when inspecting the code).
185020. There is now an overall timeout for performing a callout verification. It
1851 defaults to 4 times the callout timeout, which applies to individual SMTP
1852 commands during the callout. The overall timeout applies when there is more
1853 than one host that can be tried. The timeout is checked before trying the
1854 next host. This prevents very long delays if there are a large number of
1855 hosts and all are timing out (e.g. when the network connections are timing
1856 out). The value of the overall timeout can be changed by specifying an
1857 additional sub-option for "callout", called "maxwait". For example:
1859 verify = sender/callout=5s,maxwait=20s
186121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1862 to the end before writing, but this should make it even safer).
186422. Exim was forgetting that it had advertised PIPELINING for the second and
1865 subsequent messages on an SMTP connection. It was also not resetting its
1866 memory on STARTTLS and an internal HELO.
186823. When Exim logs an SMTP synchronization error within a session, it now
1869 records whether PIPELINING has been advertised or not.
187124. Added 3 instances of "(long int)" casts to time_t variables that were being
1872 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1873 rather than long int.
187525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
187726. Added the never_mail option to autoreply.
1880Exim version 4.41
1883 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1884 crash if the getsockname() call failed; this can happen if a connection is
1885 closed very soon after it is established. The problem was simply in the
1886 order in which certain operations were done, causing Exim to try to write
1887 to the SMTP stream before it had set up the file descriptor. The bug has
1888 been fixed by making things happen in the correct order.
1891Exim version 4.40
1894 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1895 before the connection was closed, thus losing the rejection response.
1897 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1898 some early Solaris releases, but causes trouble in current releases where
1899 socklen_t is defined.
1901 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1902 always exist.
1904 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1905 configured.
1907 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1908 that releasing the top of it at the end releases what was used for sub-
1909 expansions (unless the block got too big). However, discard this block if
1910 the first thing is a variable or header, so that we can use its block when
1911 it is dynamic (useful for very large $message_headers, for example).
1913 6. Lookups now cache *every* query, not just the most recent. A new, separate
1914 store pool is used for this. It can be recovered when all lookup caches are
1915 flushed. Lookups now release memory at the end of their result strings.
1916 This has involved some general refactoring of the lookup sources.
1918 7. Some code has been added to the store_xxx() functions to reduce the amount
1919 of flapping under certain conditions.
1921 8. log_incoming_interface used to affect only the <= reception log lines. Now
1922 it causes the local interface and port to be added to several more SMTP log
1923 lines, for example "SMTP connection from", and rejection lines.
1925 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
192710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
192911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1930 could be overwritten at the end of the current message (or the start of a
1931 new message if it was set in a HELO ACL). The value is now preserved for
1932 the duration of the SMTP connection.
193412. If a transport had a headers_rewrite setting, and a matching header line
1935 contained an unqualified address, that address was qualified, even if it
1936 did not match any rewriting rules. The underlying bug was that the values
1937 of the flags that permit the existence of unqualified sender and recipient
1938 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1939 non-local messages, and by -bnq for local messages) were not being
1940 preserved with the message after it was received.
194213. When Exim was logging an SMTP synchronization error, it could sometimes log
1943 "next input=" as part of the text comprising the host identity instead of
1944 the correct text. The code was using the same buffer for two different
1945 strings. However, depending on which order the printing function evaluated
1946 its arguments, the bug did not always show up. Under Linux, for example, my
1947 test suite worked just fine.
194914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1950 doesn't work with some older versions of Perl. It has been changed to "my",
1951 which in any case is probably the better facility to use.
195315. A really picky compiler found some instances of statements for creating
1954 error messages that either had too many or two few arguments for the format
1955 string.
195716. The size of the buffer for calls to the DNS resolver has been increased
1958 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1959 for addresses that have a lot of PTR records. This alleviates a problem; it
1960 does not fully solve it.
196217. A dnsdb lookup for PTR records that receives more data than will fit in the
1963 buffer now truncates the list and logs the incident, which is the same
1964 action as happens when Exim is looking up a host name and its aliases.
1965 Previously in this situation something unpredictable would happen;
1966 sometimes it was "internal error: store_reset failed".
196818. If a server dropped the connection unexpectedly when an Exim client was
1969 using GnuTLS and trying to read a response, the client delivery process
1970 crashed while trying to generate an error log message.
197219. If a "warn" verb in an ACL added multiple headers to a message in a single
1973 string, for example:
1975 warn message = H1: something\nH2: something
1977 the text was added as a single header line from Exim's point of view
1978 though it ended up OK in the delivered message. However, searching for the
1979 second and subsequent header lines using $h_h2: did not work. This has been
1980 fixed. Similarly, if a system filter added multiple headers in this way,
1981 the routers could not see them.
198320. Expanded the error message when iplsearch is called with an invalid key to
1984 suggest using net-iplsearch in a host list.
198621. When running tests using -bh, any delays imposed by "delay" modifiers in
1987 ACLs are no longer actually imposed (and a message to that effect is
1988 output).
199022. If a "gecos" field in a passwd entry contained escaped characters, in
1991 particular, if it contained a \" sequence, Exim got it wrong when building
1992 a From: or a Sender: header from that name. A second bug also caused
1993 incorrect handling when an unquoted " was present following a character
1994 that needed quoting.
199623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1997 was not being matched caselessly.
199924. Arranged for all hyphens in the exim.8 source to be escaped with
2000 backslashes.
200225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2003 properly. Recipient callout cache records were still being keyed to include
2004 the sender, even when use_sender was set false. This led to far more
2005 callouts that were necessary. The sender is no longer included in the key
2006 when use_sender is false.
200826. Added "control = submission" modifier to ACLs.
201027. Added the ${base62d: operator to decode base 62 numbers.
201228. dnsdb lookups can now access SRV records.
201429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2015 the configuration file.
201730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2018 (-v) mode. This makes the output for a verbose queue run more intelligible.
202031. Added a use_postmaster feature to recipient callouts.
202232. Added the $body_zerocount variable, containing the number of binary zero
2023 bytes in the message body.
202533. The time of last modification of the "new" subdirectory is now used as the
2026 "mailbox time last read" when there is a quota error for a maildir
2027 delivery.
202934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
203135. Added +ignore_unknown as a special item in host lists.
203336. Code for decoding IPv6 addresses in host lists is now included, even if
2034 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2035 address was recognized as an IP address, but was then not correctly decoded
2036 into binary, causing unexpected and incorrect effects when compared with
2037 another IP address.
2040Exim version 4.34
2043 1. Very minor rewording of debugging text in manualroute to say "list of
2044 hosts" instead of "hostlist".
2046 2. If verify=header_syntax was set, and a header line with an unqualified
2047 address (no domain) and a large number of spaces between the end of the
2048 name and the colon was received, the reception process suffered a buffer
2049 overflow, and (when I tested it) crashed. This was caused by some obsolete
2050 code that should have been removed. The fix is to remove it!
2052 3. When running in the test harness, delay a bit after writing a bounce
2053 message to get a bit more predictability in the log output.
2055 4. Added a call to search_tidyup() just before forking a reception process. In
2056 theory, someone could use a lookup in the expansion of smtp_accept_max_
2057 per_host which, without the tidyup, could leave open a database connection.
2059 5. Added the variables $recipient_data and $sender_data which get set from a
2060 lookup success in an ACL "recipients" or "senders" condition, or a router
2061 "senders" option, similar to $domain_data and $local_part_data.
2063 6. Moved the writing of debug_print from before to after the "senders" test
2064 for routers.
2066 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2067 problems for message scanning, either using a data ACL, or using
2068 local_scan() because the Received: header was not generated till after they
2069 were called (in order to set the time as the time of reception completion).
2070 I have revised the way this works. The header is now generated after the
2071 body is received, but before the ACL or local_scan() are called. After they
2072 are run, the timestamp in the header is updated.
2075Exim version 4.33
2078 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2079 before starting a queue runner without re-exec. This happened only when
2080 deliver_drop_privilege was set or when the Exim user was set to root. The
2081 effect of the bug was that timeouts during subsequent deliveries caused
2082 crashes instead of being properly handled. The handler is now left at its
2083 default (and expected) setting.
2085 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2086 message, again when deliver_drop_privilege is set or Exim is run as root.
2087 The bug described in (1) was not present in this case, but the tidying up
2088 of the other signals was missing. I have made the two cases consistent.
2090 3. The ignore_target_hosts setting on a manualroute router was being ignored
2091 for hosts that were looked up using the /MX notation.
2093 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2094 in domain lists.
2096 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2097 operated on the sender address. After changing the $sender_address to <>
2098 for the sender address verify, Exim was re-instated it as the original
2099 (before rewriting) address, but remembering that it had rewritten it, so it
2100 wasn't rewriting it again. This bug also had the effect of breaking the
2101 sender address verification caching when the sender address was rewritten.
2103 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2104 This has been changed so that if the ip literal address matches
2105 ignore_target_hosts, the router declines.
2107 7. Added expansion conditions match_domain, match_address, and match_local_
2108 part (NOT match_host).
2110 8. The placeholder for the Received: header didn't have a length field set.
2112 9. Added code to Exim itself and to exim_lock to test for a specific race
2113 condition that could lead to file corruption when using MBX delivery. The
2114 issue is with the lockfile that is created in /tmp. If this file is removed
2115 after a process has opened it but before that process has acquired a lock,
2116 there is the potential for a second process to recreate the file and also
2117 acquire a lock. This could lead to two Exim processes writing to the file
2118 at the same time. The added code performs the same test as UW imapd; it
2119 checks after acquiring the lock that its file descriptor still refers to
2120 the same named file.
212210. The buffer for building added header lines was of fixed size, 8192 bytes.
2123 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2124 when Exim is built.
212611. Added the smtp_active_hostname option. If used, this will typically be made
2127 to depend on the incoming interface address. Because $interface_address is
2128 not set up until the daemon has forked a reception process, error responses
2129 that can happen earlier (such as "too many connections") no longer contain
2130 a host name.
213212. If an expansion in a condition on a "warn" statement fails because a lookup
2133 defers, the "warn" statement is abandoned, and the next ACL statement is
2134 processed. Previously this caused the whole ACL to be aborted.
213613. Added the iplsearch lookup type.
213814. Added ident_timeout as a log selector.
214015. Added tls_certificate_verified as a log selector.
214216. Added a global option tls_require_ciphers (compare the smtp transport
2143 option of the same name). This controls incoming TLS connections.
214517. I finally figured out how to make tls_require_ciphers do a similar thing
2146 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2147 before starting the TLS session.
214918. Tabs are now shown as \t in -bP output.
215119. If the log selector return_path_on_delivery was set, Exim crashed when
2152 bouncing a message because it had too many Received: header lines.
215420. If two routers both had headers_remove settings, and the first one included
2155 a superfluous trailing colon, the final name in the first list and the
2156 first name in the second list were incorrectly joined into one item (with a
2157 colon in the middle).
2160Exim version 4.32
2163 1. Added -C and -D options to the exinext utility, mainly to make it easier
2164 to include in the automated testing, but these could be helpful when
2165 multiple configurations are in use.
2167 2. The exinext utility was not formatting the output nicely when there was
2168 an alternate port involved in the retry record key, nor when there was a
2169 message id as well (for retries that were specific to a specific message
2170 and a specific host). It was also confused by IPv6 addresses, because of
2171 the additional colons they contain. I have fixed the IPv4 problem, and
2172 patched it up to do a reasonable job for IPv6.
2174 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2175 delivery, the log line now contains "pipelined" if PIPELINING was used.
2177 4. An SMTP transport process used to panic and die if the bind() call to set
2178 an explicit outgoing interface failed. This has been changed; it is now
2179 treated in the same way as a connect() failure.
2181 5. A reference to $sender_host_name in the part of a conditional expansion
2182 that was being skipped was still causing a DNS lookup. This no longer
2183 occurs.
2185 6. The def: expansion condition was not recognizing references to header lines
2186 that used bh_ and bheader_.
2188 7. Added the _cache feature to named lists.
2190 8. The code for checking quota_filecount in the appendfile transport was
2191 allowing one more file than it should have been.
2193 9. For compatibility with Sendmail, the command line option
2195 -prval:sval
2197 is equivalent to
2199 -oMr rval -oMs sval
2201 and sets the incoming protocol and host name (for trusted callers). The
2202 host name and its colon can be omitted when only the protocol is to be set.
2203 Note the Exim already has two private options, -pd and -ps, that refer to
2204 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2205 "s", but I don't think that's a major issue.
220710. A number of refactoring changes to the code, none of which should affect
2208 Exim's behaviour:
2210 (a) The number of logging options was getting close to filling up the
2211 32-bit word that was used as a bit map. I have split them into two classes:
2212 those that are passed in the argument to log_write(), and those that are
2213 only ever tested independently outside of that function. These are now in
2214 separate 32-bit words, so there is plenty of room for expansion again.
2215 There is no change in the user interface or the logging behaviour.
2217 (b) When building, for example, log lines, the code previously used a
2218 macro that called string_cat() twice, in order to add two strings. This is
2219 not really sufficiently general. Furthermore, there was one instance where
2220 it was actually wrong because one of the argument was used twice, and in
2221 one call a function was used. (As it happened, calling the function twice
2222 did not affect the overall behaviour.) The macro has been replaced by a
2223 function that can join an arbitrary number of extra strings onto a growing
2224 string.
2226 (c) The code for expansion conditions now uses a table and a binary chop
2227 instead of a serial search (which was left over from when there were very
2228 few conditions). Also, it now recognizes conditions like "pam" even when
2229 the relevant support is not compiled in: a suitably worded error message is
2230 given if an attempt is made to use such a condition.
223211. Added ${time_interval:xxxxx}.
223412. A bug was causing one of the ddress fields not to be passed back correctly
2235 from remote delivery subprocesses. The field in question was not being
2236 subsequently used, so this caused to problems in practice.
223813. Added new log selectors queue_time and deliver_time.
224014. Might have fixed a bug in maildirsizefile handling that threw up
2241 "unexpected character" debug warnings, and recalculated the data
2242 unnecessarily. In any case, I expanded the warning message to give more
2243 information.
224515. Added the message "Restricted characters in address" to the statements in
2246 the default ACL that block characters like @ and % in local parts.
224816. Change 71 for release 4.31 proved to be much less benign that I imagined.
2249 Three changes have been made:
2251 (a) There was a serious bug; a negative response to MAIL caused the whole
2252 recipient domain to be cached as invalid, thereby blocking all messages
2253 to all local parts at the same domain, from all senders. This bug has
2254 been fixed. The domain is no longer cached after a negative response to
2255 MAIL if the sender used is not empty.
2257 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2258 been restored.
2260 (c) A new callout option, "use_sender" has been added for people who want
2261 the modified behaviour.
2264Exim version 4.31
2267 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2268 Larry Rosenman.
2270 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2271 indeed breaks things for older releases.
2273 3. Added additional logging to the case where there is a problem reading data
2274 from a filter that is running in a subprocess using a pipe, in order to
2275 try to track down a specific problem.
2277 4. Testing facility fudge: when running in the test harness and attempting
2278 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2279 getting "No route to host". Convert this to a timeout.
2281 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2282 warning.
2284 6. Some OS don't have socklen_t but use size_t instead. This affects the
2285 fifth argument of getsockopt() amongst other things. This is now
2286 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2287 can be set for individual OS. I have set it for SunOS5, OSF1, and
2288 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2289 some earlier ones do not.
2291 7. Change 4.30/15 was not doing the test caselessly.
2293 8. The standard form for an IPv6 address literal was being rejected by address
2294 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2295 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2296 this, as well as the form without the "IPv6" on the front (but only when
2297 address literals are enabled, of course).
2299 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
230110. Exim crashed if a message with an empty sender address specified by -f
2302 encountered a router with an errors_to setting. This could be provoked only
2303 by a command such as
2305 exim -f "" ...
2307 where an empty string was supplied; "<>" did not hit this bug.
230911. Installed PCRE release 4.5.
231112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2312 remained set. It is now erased.
231413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2315 times from message ids (which are base 36 rather than the normal 62).
231714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2318 were being counted as actual protocol errors, and logged if the log
2319 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2320 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2321 and DATA following a set of rejected RCPTs do not count as protocol errors.
2322 In other words, Exim assumes they were pipelined, though this may not
2323 actually be the case. Of course, in all cases the client gets an
2324 appropriate error code.
232615. If a lookup fails in an ACL condition, a message about the failure may
2327 be available; it is used if testing the ACL cannot continue, because most
2328 such messages specify what the cause of the deferral is. However, some
2329 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2330 that caused an old message to be retained and used if a later statement
2331 caused a defer, replacing the real cause of the deferral.
233316. If an IP address had so many PTR records that the DNS lookup buffer
2334 was not large enough to hold them, Exim could crash while trying to process
2335 the truncated data. It now detects and logs this case.
233717. Further to 4.21/58, another change has been made: if (and only if) the
2338 first line of a message (the first header line) ends with CRLF, a bare LF
2339 in a subsequent header line has a space inserted after it, so as not to
2340 terminate the header.
234218. Refactoring: tidied an ugly bit of code in appendfile that copied data
2343 unnecessarily, used atoi() instead of strtol(), and didn't check the
2344 termination when getting file sizes from file names by regex.
234619. Completely re-implemented the support for maildirsize files, in the light
2347 of a number of problems with the previous contributed implementation
2348 (4.30/29). In particular:
2350 . If the quota is zero, the maildirsize file is maintained, but no quota is
2351 imposed.
2353 . If the maildir directory does not exist, it is created before any attempt
2354 to write a maildirsize file.
2356 . The quota value in the file is just a cache; if the quota is changed in
2357 the transport, the new value overrides.
2359 . A regular expression is available for excluding directories from the
2360 count.
236220. The autoreply transport checks the characters in options that define the
2363 message's headers; it allows continued headers, but it was checking with
2364 isspace() after an embedded newline instead of explicitly looking for a
2365 space or a tab.
236721. If all the "regular" hosts to which an address was routed had passed their
2368 expiry times, and had not reached their retry times, the address was
2369 bounced, even if fallback hosts were defined. Now Exim should go on to try
2370 the fallback hosts.
237222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2373 equivalent code in the SMTP transport. Some hosts send humungous responses
2374 to HELO/EHLO, more than 1024 it seems.
237623. Refactoring: code in filter.c used (void *) for "any old type" but this
2377 gives compiler warnings in some environments. I've now done it "properly",
2378 using a union.
238024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2381 (because of problems with the built-in one) was declared to return uschar *
2382 instead of char *, causing compiler failure.
238425. Fixed a file descriptor leak when processing alias/forward files.
238626. Fixed a minor format string issue in dbfn.c.
238827. Typo in exim.c: ("dmbnz" for "dbmnz").
239028. If a filter file refered to $h_xxx or $message_headers, and the headers
2391 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2392 become corrupted.
239429. When a sender address is verified, it is cached, to save repeating the test
2395 when there is more than one recipient in a message. However, when the
2396 verification involves a callout, it is possible for different callout
2397 options to be set for different recipients. It is too complicated to keep
2398 track of this in the cache, so now Exim always runs a verification when a
2399 callout is required, relying on the callout cache for the optimization.
2400 The overhead is duplication of the address routing, but this should not be
2401 too great.
240330. Fixed a bug in callout caching. If a RCPT command caused the sender address
2404 to be verified with callout=postmaster, and the main callout worked but the
2405 postmaster check failed, the verification correctly failed. However, if a
2406 subsequent RCPT command asked for sender verification *without* the
2407 postmaster check, incorrect caching caused this verification also to fail,
2408 incorrectly.
241031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2411 it was not caching the DNS options (qualify_single, search_parents) that
2412 were used when the lookup failed. A subsequent lookup with different
2413 options therefore always gave the same answer, though there were cases
2414 where it should not have. (Example: a "domains = !$mx_any" option on a
2415 dnslookup router: the "domains" option is always processed without any
2416 widening, but the router might have qualify_single set.) Now Exim uses the
2417 cached value only when the same options are set.
241932. Added John Jetmore's "exipick" utility to the distribution.
242133. GnuTLS: When an attempt to start a TLS session fails for any reason other
2422 than a timeout (e.g. a certificate is required, and is not provided), an
2423 Exim server now closes the connection immediately. Previously it waited for
2424 the client to close - but if the client is SSL, it seems that they each
2425 wait for each other, leading to a delay before one of them times out.
242734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2428 maintained 0.8.x compatibility because I don't think many are using it, and
2429 it is clearly obsolete.
243135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2432 transport.
243436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2435 client certificate was expired. A simple patch fixes this, though I don't
2436 understand the full logic of why the verify callback is called multiple
2437 times.
243937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2440 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2441 which causes problems with some clients (such as the Certicom SSL Plus
2442 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2443 disables the coutermeasure allowing Eudora to connect."
244538. Exim was not checking that a write() to a log file succeeded. This could
2446 lead to Bad Things if a log got too big, in particular if it hit a file
2447 size limit. Exim now panics and dies if it cannot write to a log file, just
2448 as it does if it cannot open a log file.
245039. Modified OS/Makefile-Linux so that it now contains
2454 The two -D definitions ensure that Exim is compiled with large file
2455 support, which makes it possible to handle log files that are bigger than
2456 2^31.
245840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2459 instance) a domain was checked against a named list that involved a lookup,
2460 causing $domain_data to be set, then another domain was checked against the
2461 same list, then the first domain was re-checked, the value of $domain_data
2462 after the final check could be wrong. In particular, if the second check
2463 failed, it could be set empty. This bug probably also applied to
2464 $localpart_data.
246641. The strip_trailing_dot option was not being applied to the address given
2467 with the -f command-line option.
246942. The code for reading a message's header from the spool was incrementing
2470 $received_count, but never initializing it. This meant that the value was
2471 incorrect (doubled) while delivering a message in the same process in which
2472 it was received. In the most common configuration of Exim, this never
2473 happens - a fresh exec is done - but it can happen when
2474 deliver_drop_privilege is set.
247643. When Exim logs an SMTP synchronization error - client data sent too soon -
2477 it now includes up to 150 characters of the unexpected data in the log
2478 line.
248044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2481 and building data strings. The size of both of these buffers was 10 000
2482 bytes - far larger than anybody would *ever* want, thought I. Needless to
2483 say, somebody hit the limit. I have increased the maximum line length to
2484 20 000 and the maximum data length of concatenated lines to 100 000. I have
2485 also fixed two bugs, because there was no checking on these buffers. Tsk,
2486 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2487 buffer is too small.
248945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2490 lsearch lookups. Now it does.
249246. When parsing a route_list item in a manualroute router, a fixed-length
2493 buffer was used for the list of hosts. I made this 1024 bytes long,
2494 thinking that nobody would ever have a list of hosts that long. Wrong.
2495 Somebody had a whole pile of complicated expansion conditions, and the
2496 string was silently truncated, leading to an expansion error. It turns out
2497 that it is easier to change to an unlimited length (owing to other changes
2498 that have happened since this code was originally written) than to build
2499 structure for giving a limitation error. The length of the item that
2500 expands into the list of hosts is now unlimited.
250247. The lsearch lookup could not handle data where the length of text line was
2503 more than 4095 characters. Such lines were truncated, leading to shortened
2504 data being returned. It should now handle lines of any length.
250648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2507 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2508 ACL").
251049. Cosmetic tidy to scripts like exicyclog that are generated by globally
2511 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2512 no longer happens in comment lines. A list of replacements is now placed
2513 at the head of all of the source files, except those whose only change is
2514 to replace PERL_COMMAND in the very first #! line.
251650. Replaced the slow insertion sort in queue.c, for sorting the list of
2517 messages on the queue, with a bottom-up merge sort, using code contributed
2518 by Michael Haardt. This should make operations like -bp somewhat faster on
2519 large queues. It won't affect queue runners, except when queue_run_in_order
2520 is set.
252251. Installed eximstats 1.31 in the distribution.
252452. Added support for SRV lookups to the dnslookup router.
252653. If an ACL referred to $message_body or $message_body_end, the value was not
2527 reset for any messages that followed in the same SMTP session.
252954. The store-handling optimization for building very long strings was not
2530 differentiating between the different store pools. I don't think this
2531 actually made any difference in practice, but I've tidied it.
253355. While running the routers to verify a sender address, $sender_address
2534 was still set to the sender address. This is wrong, because when routing to
2535 send a bounce to the sender, it would be empty. Therefore, I have changed
2536 it so that, while verifying a sender address, $sender_address is set to <>.
2537 (There is no change to what happens when verifying a recipient address.)
253956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2540 target A or AAAA records (if not already returned) without resetting the
2541 qualify_single or search_parents options of the DNS resolver. These are
2542 inappropriate in this case because the targets of MX and SRV records must
2543 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2544 target that, when qualified, matched something in the local domain. These
2545 two options are now turned off when doing these lookups.
254757. It seems that at least some releases of Reiserfs (which does not have the
2548 concept of a fixed number of inodes) returns zero and not -1 for the
2549 number of available inodes. This interacted badly with check_spool_inodes,
2550 which assumed that -1 was the "no such thing" setting. What I have done is
2551 to check that the total number of inodes is greater than zero before doing
2552 the test of how many are available.
255458. When a "warn" ACL statement has a log_message modifier, the message is
2555 remembered, and not repeated. This is to avoid a lot of repetition when a
2556 message has many recipients that cause the same warning to be written.
2557 Howewer, Exim was preserving the list of already written lines for an
2558 entire SMTP session, which doesn't seem right. The memory is now reset if a
2559 new message is started.
256159. The "rewrite" debugging flag was not showing the result of rewriting in the
2562 debugging output unless log_rewrite was also set.
256460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2565 of (int)(handle) when we know that handle contains (void *)(-1).
256761. The Exim daemon panic-logs an error return when it closes the incoming
2568 connection. However "connection reset by peer" seems to be common, and
2569 isn't really an error worthy of noting specially, so that particular error
2570 is no long logged.
257262. When Exim is trying to find all the local interfaces, it used to panic and
2573 die if the ioctl to get the interface flags failed. However, it seems that
2574 on at least one OS (Solaris 9) it is possible to have an interface that is
2575 included in the list of interfaces, but for which you get a failure error
2576 for this call. This happens when the interface is not "plumbed" into a
2577 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2578 failure of the "get flags" call assumes that the interface is down.
258063. Added a ${eval10: operator, which assumes all numbers are decimal. This
2581 makes life easier for people who are doing arithmetic on fields extracted
2582 from dates, where you often get leading zeros that should not be
2583 interpreted as octal.
258564. Added qualify_domain to the redirect router, to override the global
2586 setting.
258865. If a pathologically long header line contained very many addresses (the
2589 report of this problem mentioned 10 000) and each of them was rewritten,
2590 Exim could use up a very large amount of memory. (It kept on making new
2591 copies of the header line as it rewrote, and never released the old ones.)
2592 At the expense of a bit more processing, the header rewriting function has
2593 been changed so that it no longer eats memory in this way.
259566. The generation of the Received: header has been moved from the time that a
2596 message starts to be received, to the time that it finishes. The timestamp
2597 in the Received: header should now be very close to that of the <= log
2598 line. There are two side-effects of this change:
2600 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2601 logged header lines no longer include the local Received: line, because
2602 it has not yet been created. The same applies to a copy of the message
2603 that is returned to a non-SMTP sender when a message is rejected.
2605 (b) When a filter file is tested using -bf, no additional Received: header
2606 is added to the test message. After some thought, I decided that this
2607 is a bug fix.
2609 This change does not affect the value of $received_for. It is still set
2610 after address rewriting, but before local_scan() is called.
261267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
261468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2615 gave an unhelpful panic error message, and a defer error. I have managed to
2616 change this behaviour so that it now rejects any supplied certificate,
2617 which seems right, as the list of acceptable certificates is empty.
261969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2620 gave an unhelpful defer error. I have not managed to make this reject any
2621 supplied certificates, but the error message it gives is "no certificate
2622 supplied", which is not helpful.
262470. exigrep's output now also includes lines that are not associated with any
2625 message, but which match the given pattern. Implemented by a patch from
2626 Martin Sluka, which also tidied up the Perl a bit.
262871. Recipient callout verification, like sender verification, was using <> in
2629 the MAIL FROM command. This isn't really the right thing, since the actual
2630 sender may affect whether the remote host accepts the recipient or not. I
2631 have changed it to use the actual sender in the callout; this means that
2632 the cache record is now keyed on a recipient/sender pair, not just the
2633 recipient address. There doesn't seem to be a real danger of callout loops,
2634 since a callout by the remote host to check the sender would use <>.
2635 [SEE ABOVE: changed after hitting problems.]
263772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2638 temporary errors. However, in the case of such a code being given after
2639 the end of a data transmission (i.e. after ".") Exim was failing to write
2640 a retry record for the message. (Yes, there was some broken host that was
2641 actually sending 8xx at this point.)
264373. An unknown lookup type in a host list could cause Exim to panic-die when
2644 the list was checked. (An example that provoked this was putting <; in the
2645 middle of a list instead of at the start.) If this happened during a DATA
2646 ACL check, a -D file could be left lying around. This kind of configuration
2647 error no longer causes Exim to die; instead it causes a defer errror. The
2648 incident is still logged to the main and panic logs.
265074. Buglet left over from Exim 3 conversion. The message "too many messages
2651 in one connection" was written to the rejectlog but not the mainlog, except
2652 when address rewriting (yes!) was being logged.
265475. Added write_rejectlog option.
265676. When a system filter was run not as root (that is, when system_filter_user
2657 was set), the values of the $n variables were not being returned to the
2658 main process; thus, they were not subsequently available in the $sn
2659 variables.
266177. Added +return_path_on_delivery log selector.
266378. A connection timeout was being treated differently from recipients deferred
2664 when testing hosts_max_try with a message that was older than the host's
2665 retry timeout. (The host should not be counted, thus allowing all hosts to
2666 be tried at least once before bouncing.) This may have been the cause of an
2667 occasionally reported bug whereby a message would remain on the queue
2668 longer than the retry timeout, but would be bounced if a delivery was
2669 forced. I say "may" because I never totally pinned down the problem;
2670 setting up timeout/retry tests is difficult. See also the next item.
267279. The ultimate address timeout was not being applied to errors that involved
2673 a combination of host plus message (for example, a timeout on a MAIL
2674 command). When an address resolved to a number of possible hosts, and they
2675 were not all tried for each delivery (e.g. because of hosts_max_try), a
2676 message could remain on the queue longer than the retry timeout.
267880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2679 Haardt.
268181. Fixed an obscure SMTP outgoing bug which required at least the following
2682 conditions: (a) there was another message waiting for the same server;
2683 (b) the server returned 5xx to all RCPT commands in the first message so
2684 that the message was not completed; (c) the server dropped the connection
2685 or gave a negative response to the RSET that Exim sends to abort the
2686 transaction. The observed case was a dropped connection after DATA that had
2687 been sent in pipelining mode. That is, the server had advertised PIPELINING
2688 but was not implementing it correctly. The effect of the bug was incorrect
2689 behaviour, such as trying another host, and this could lead to a crash.
2692Exim version 4.30
2695 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2696 and daemon.c were passed as pointers to ints; they should have been
2697 pointers to socklen_t variables (which are typically unsigned ints).
2699 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2700 fixed.
2702 3. Fixed a really odd bug that affected only the testing scheme; patching a
2703 certain fixed string in the binary changed the value of another string that
2704 happened to be identical to the end of the original first string.
2706 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2707 name", it returns that address as the IP address. On some operating
2708 systems (e.g. Solaris), it also passes back the IP address string as the
2709 "host name". However, on others (e.g. Linux), it passes back an empty
2710 string. Exim wasn't checking for this, and was changing the host name to an
2711 empty string, assuming it had been canonicized.
2713 5. Although rare, it is permitted to have more than one PTR record for a given
2714 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2715 all the names associated with an address, because they do in Solaris.
2716 However, it seems that they do not in Linux for data that comes from the
2717 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2718 I found this out when I moved to a new Linux workstation and tried to run
2719 the Exim test suite.
2721 To get round this problem I have changed the code so that it now does its
2722 own call to the DNS to look up PTR records when searching for a host name.
2723 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2724 addresses that are only in /etc/hosts are still found.
2726 This behaviour is, however, controlled by an option called host_lookup_
2727 order, which defaults to "bydns:byaddr". If people want to use the other
2728 order, or indeed, just use one or the other means of lookup, they can
2729 specify it in this variable.
2731 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2732 some operating systems, this comes back from gethostbyaddr() as an empty
2733 string, and this is what Exim used to test for. However, it seems that in
2734 other systems, "." is yielded. Exim now tests for this case too.
2736 7. The values of check_spool_space and check_log_space are now held internally
2737 as a number of kilobytes instead of an absolute number of bytes. If a
2738 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2739 kilobyte. This means that much larger values can be stored.
2741 8. Exim monitor: an attempt to get the action menu when not actually pointing
2742 at a message produces an empty menu entitled "No message selected". This
2743 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2744 no entries in it ("Shell widget menu has zero width and/or height"). So I
2745 have added a single, blank menu entry in this case.
2747 9. Added ${quote_local_part.
274910. MIME decoding is now applied to the contents of Subject: header lines when
2750 they are logged.
275211. Now that a reference to $sender_host_address automatically causes a reverse
2753 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2754 host lookup before query-style lookups in lists that might use this
2755 variable. This has therefore been abolished, and the "net-" prefix is no
2756 longer necessary for query-style lookups.
275812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2759 have been a typo for LFLAGS, so it has been changed.
276113. The install script calls Exim with "-C /dev/null" in order to find the
2762 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2763 to be output. Howeve, since Exim outputs its version number before the
2764 error, it didn't break the script. It just looked ugly. I fixed this by
2765 always allowing "-C /dev/null" if the caller is root.
276714. Ignore overlarge ACL variable number when reading spool file - insurance
2768 against a later release with more variables having written the file.
277015. The standard form for an IPv6 address literal was being rejected by EHLO.
2771 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2772 this, as well as the form without the "IPv6" on the front.
277416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2775 OS/Makefile-Darwin file.
277717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2778 only to LDAP libraries that do not have LDAP_OPT_DEREF.
278018. After change 4.21/52, "%ld" was used to format the contents of the $inode
2781 variable. However, some OS use ints for inodes. I've added cast to long int
2782 to get rid of the compiler warning.
278419. I had forgotten to lock out "/../" in configuration file names when
2785 ALT_CONFIG_PREFIX was set.
278720. Routers used for verification do not need to specify transports. However,
2788 if such a router generated a host list, and callout was configured, Exim
2789 crashed, because it could not find a port number from the (non-existent)
2790 transport. It now assumes port 25 in this circumstance.
279221. Added the -t option to exigrep.
279422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2795 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2796 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2797 them is set, LOOKUP_LSEARCH is forced.
279923. "exim -bV" now outputs a list of lookups that are included in the binary.
280124. Added sender and host information to the "rejected by local_scan()" log
2802 line; previously there was no indication of these.
280425. Added .include_if_exists.
280626. Change 3.952/11 added an explicit directory sync on top of a file sync for
2807 Linux. It turns out that not all file systems support this. Apparently some
2808 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2809 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2810 not supported on the file descriptor, is now ignored when Exim is trying to
2811 sync a directory. This applies only to Linux.
281327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
281528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2816 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2817 this.
281929. Added support for maildirsize files from supplied patch (modified a bit).
282130. The use of :fail: followed by an empty string could lead Exim to respond to
2822 sender verification failures with (e.g.):
2824 550 Verification failed for <xxx>
2825 550 Sender verify failed
2827 where the first response line was missing the '-' that indicates it is not
2828 the final line of the response.
283031. The loop for finding the name of the user that called Exim had a hardwired
2831 limit of 10; it now uses the value of finduser_retries, which is used for
2832 all other user lookups.
283432. Added $received_count variable, available in data and not_smtp ACLs, and at
2835 delivery time.
283733. Exim was neglecting to zero errno before one call of strtol() when
2838 expanding a string and expecting an integer value. On some systems this
2839 resulted in spurious "integer overflow" errors. Also, it was casting the
2840 result into an int without checking.
284234. Testing for a connection timeout using "timeout_connect" in the retry rules
2843 did not work. The code looks as if it has *never* worked, though it appears
2844 to have been documented since at least releast 1.62. I have made it work.
284635. The "timeout_DNS" error in retry rules, also documented since at least
2847 1.62, also never worked. As it isn't clear exactly what this means, and
2848 clearly it isn't a major issue, I have abolished the feature by treating it
2849 as "timeout", and writing a warning to the main and panic logs.
285136. The display of retry rules for -brt wasn't always showing the error code
2852 correctly.
285437. Added new error conditions to retry rules: timeout_A, timeout_MX,
2855 timeout_connect_A, timeout_connect_MX.
285738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2858 to the empty sender.
286039. The daemon was not analysing the content of -oX till after it had closed
2861 stderr and disconnected from the controlling terminal. This meant that any
2862 syntax errors were only noted on the panic log, and the return code from
2863 the command was 0. By re-arranging the code a little, I've made the
2864 decoding happen first, so such errors now appear on stderr, and the return
2865 code is 1. However, the actual setting up of the sockets still happens in
2866 the disconnected process, so errors there are still only recorded on the
2867 panic log.
286940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2870 connections (as happens on some IP stacks) was logged at start up time as
2871 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2872 it from "IPv6 and IPv4", which means that two separate sockets are being
2873 used.
287541. The debug output for gethostbyname2() or getipnodebyname() failures now
2876 says whether AF_INET or AF_INET6 was passed as an argument.
287842. Exiwhat output was messed up when time zones were included in log
2879 timestamps.
288143. Exiwhat now gives more information about the daemon's listening ports,
2882 and whether -tls-on-connect was used.
288444. The "port" option of the smtp transport is now expanded.
288645. A "message" modifier in a "warn" statement in a non-message ACL was being
2887 silently ignored. Now an error message is written to the main and panic
2888 logs.
289046. There's a new ACL modifier called "logwrite" which writes to a log file
2891 as soon as it is encountered.
289347. Added $local_user_uid and $local_user_gid at routing time.
289548. Exim crashed when trying to verify a sender address that was being
2896 rewritten to "<>".
289849. Exim was recognizing only a space character after ".include". It now also
2899 recognizes a tab character.
290150. Fixed several bugs in the Perl script that creates the exim.8 man page by
2902 extracting the relevant information from the specification. The man page no
2903 longer contains scrambled data for the -d option, and I've added a section
2904 at the front about calling Exim under different names.
290651. Added "extra_headers" argument to the "mail" command in filter files.
290852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2909 crash.
291153. Installed eximstats 1.29.
291354. Added transport_filter_timeout as a generic transport option.
291555. Exim no longer adds an empty Bcc: header to messages that have no To: or
2916 Cc: header lines. This was required by RFC 822, but it not required by RFC
2917 2822.
291956. Exim used to add From:, Date:, and Message-Id: header lines to any
2920 incoming messages that did not have them. Now it does so only if the
2921 message originates locally, that is, if there is no associated remote host
2922 address. When Resent- header lines are present, this applies to the Resent-
2923 lines rather than the non-Resent- lines.
292557. Drop incoming SMTP connection after too many syntax or protocol errors. The
2926 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
292858. Messages for configuration errors now include the name of the main
2929 configuration file - useful now that there may be more than one file in a
2930 list (.included file names were always shown).
293259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2933 for those rare installations that do not start the daemon as root or run it
2934 setuid root. I've cut out the call to initgroups() if the daemon is not
2935 root at that time.
293760. The Exim user and group can now be bound into the binary as text strings
2938 that are looked up at the start of Exim's processing.
294061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
294262. Added $mailstore_basename variable.
294463. Installed patch to sieve.c from Michael Haardt.
294664. When Exim failed to open the panic log after failing to open the main log,
2947 the original message it was trying to log was written to stderr and debug
2948 output, but if they were not available (the usual case in production), it
2949 was lost. Now it is written to syslog before the two lines that record the
2950 failures to open the logs.
295265. Users' Exim filters run in subprocesses under the user's uid. It is
2953 possible for a "deliver" command or an alias in a "personal" command to
2954 provoke an address rewrite. If logging of address rewriting is configured,
2955 this fails because the process is not running as root or exim. There may be
2956 a better way of dealing with this, but for the moment (because 4.30 needs
2957 to be released), I have disabled address rewrite logging when running a
2958 filter in a non-root, non-exim process.
2961Exim version 4.24
2964 1. The buildconfig auxiliary program wasn't quoting the value set for
2965 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2966 not defined. This bug was masked in 4.22 by the effect that was fixed in
2967 change 4.23/1.
2969 2. Some messages that were rejected after a message id was allocated were
2970 shown as "incomplete" by exigrep. It no longer does this for messages that
2971 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2973 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2974 have allow_domain_literals set, the ID did not get logged in the <= line.
2975 Domain literals are now always recognized in Message-ID: header lines.
2977 4. The first argument for a ${extract expansion item is the key name or field
2978 number. Leading and trailing spaces in this item were not being ignored,
2979 causing some misleading effects.
2981 5. When deliver_drop_privilege was set, single queue runner processes started
2982 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2983 same command in the process it spins off) were not dropping privilege.
2985 6. When the daemon running as "exim" started a queue runner, it always
2986 re-executed Exim in the spun-off process. This is a waste of effort when
2987 deliver_drop_privilege is set. The new process now just calls the
2988 queue-runner function directly.
2991Exim version 4.23
2994 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2997 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2998 ignored. Though the use of -oP was forcing the writing of a pid file, it
2999 was always written to the default place.
3001 3. If the message "no IP address found for host xxxx" is generated during
3002 incoming verification, it is now followed by identification of the incoming
3003 connection (so you can more easily find what provoked it).
3005 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3007 5. Added some features to "harden" Exim a bit more against certain attacks:
3009 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3010 be put in Local/Makefile. This is like the never_users runtime option,
3011 but it cannot be overridden. The default setting is "root".
3013 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3014 prefix string with which any file named in a -C command line option
3015 must start.
3017 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3018 is retained for -C and -D only if the caller of Exim is root. Without
3019 it, the exim user may also use -C and -D and retain privilege.
3021 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3022 command line option is disabled.
3024 6. Macro names set by the -D option must start with an upper case letter, just
3025 like macro names defined in the configuration file.
3027 7. Added "dereference=" facility to LDAP.
3029 8. Two instances of the typo "uknown" in the source files are fixed.
3031 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3032 the Configure-Makefile script screwed up while processing it.
303410. Incorporated PCRE 4.4.
303611. The SMTP synchronization check was not operating right at the start of an
3037 SMTP session. For example, it could not catch a HELO sent before the client
3038 waited for the greeting. There is now a check for outstanding input at the
3039 point when the greeting is written. Because of the duplex, asynchronous
3040 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3041 way, but not yet received, when the check is performed.
304312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3044 on TCP/IP sockets, because this apparently causes some broken clients to
3045 timeout.
304713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3048 unchanged) from the Cygwin maintainer.
305014. The code for -bV that shows what is in the binary showed "mbx" when maildir
3051 was supported instead of testing for mbx. Effectively a typo.
305315. The spa authenticator server code was not checking that the input it
3054 received was valid base64.
305616. The debug output line for the "set" modifier in ACLs was not showing the
3057 name of the variable that was being set.
305917. Code tidy: the variable type "vtype_string" was never used. Removed it.
306118. Previously, a reference to $sender_host_name did not cause a DNS reverse
3062 lookup on its own. Something else was needed to trigger the lookup. For
3063 example, a match in host_lookup or the need for a host name in a host list.
3064 Now, if $sender_host_name is referenced and the host name has not yet been
3065 looked up, a lookup is performed. If the lookup fails, the variable remains
3066 empty, and $host_lookup_failed is set to "1".
306819. Added "eqi" as a case-independent comparison operator.
307020. The saslauthd authentication condition could segfault if neither service
3071 nor realm was specified.
307321. If an overflowing value such as "2048M" was set for message_size_limit, the
3074 error message that was logged was misleading, and incoming SMTP
3075 connections were dropped. The message is now more accurate, and temporary
3076 errors are given to SMTP connections.
307822. In some error situations (such as 21 above) Exim rejects all SMTP commands
3079 (except RSET) with a 421 error, until QUIT is received. However, it was
3080 failing to send a response to QUIT.
308223. The HELO ACL was being run before the code for helo_try_verify_hosts,
3083 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3084 ACL is now run after the helo_try_verify_hosts code.
308624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3087 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3088 case-independent, so other case variants are also recognized). Apparently
3089 some systems use these upper case variants.
309125. If more than two messages were waiting for the same host, and a transport
3092 filter was specified for the transport, Exim sent two messages over the
3093 same TCP/IP connection, and then failed with "socket operation on non-
3094 socket" when it tried to send the third.
309626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
309827. The extern definition of crypt16() in expand.c was not being excluded when
3099 the OS had its own crypt16() function.
310128. Added bounce_return_body as a new option, and bounce_return_size_limit
3102 as a preferred synonym for return_size_limit, both as an option and as an
3103 expansion variable.
310529. Added LIBS=-liconv to OS/Makefile-OSF1.
310730. Changed the default configuration ACL to relax the local part checking rule
3108 for addresses that are not in any local domains. For these addresses,
3109 slashes and pipe symbols are allowed within local parts, but the sequence
3110 /../ is explicitly forbidden.
311231. SPA server authentication was not clearing the challenge buffer before
3113 using it.
311532. log_message in a "warn" ACL statement was writing to the reject log as
3116 well as to the main log, which contradicts the documentation and doesn't
3117 seem right (because no rejection is happening). So I have stopped it.
311933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3120 However, I am unable to do any testing of this.
312234. Fixed an infelicity in the appendfile transport. When checking directories
3123 for a mailbox, to see if any needed to be created, it was accidentally
3124 using path names with one or more superfluous leading slashes; tracing
3125 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
312735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3128 contents are added to the log line that is written for every discarded
3129 recipient. (Previously a log_message setting was ignored.)
313136. The ${quote: operator now quotes the string if it is empty.
313337. The install script runs exim in order to find its version number. If for
3134 some reason other than non-existence or emptiness, which it checks, it
3135 could not run './exim', it was installing it with an empty version number,
3136 i.e. as "exim-". This error state is now caught, and the installation is
3137 aborted.
313938. An argument was missing from the function that creates an error message
3140 when Exim fails to connect to the socket for saslauthd authentication.
3141 This could cause Exim to crash, or give a corrupted message.
314339. Added isip, isip4, and isip6 to ${if conditions.
314540. The ACL variables $acl_xx are now saved with the message, and can be
3146 accessed later in routers, transports, and filters.
314841. The new lookup type nwildlsearch is like wildlsearch, except that the key
3149 strings in the file are not string-expanded.
315142. If a MAIL command specified a SIZE value that was too large to fit into an
3152 int variable, the check against message_size_limit failed. Such values are
3153 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3154 day this will have to be increased, but I don't think I want to be around
3155 when emails are that large.
3159Exim version 4.22
3162 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3163 iconv() is not standard in FreeBSD.
3165 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3166 IPv6 enabled. The observed symptom was a segmentation fault on return from
3167 the function os_common_find_running_interfaces() in src/os.c.
3169 3. In the check_special_case() function in daemon.c I had used "errno" as an
3170 argument name, which causes warnings on some systems. This was basically a
3171 typo, since it was named "eno" in the comments!
3173 4. The code that waits for the clock to tick (at a resolution of some fraction
3174 of a second) so as to ensure message-id uniqueness was always waiting for
3175 at least one whole tick, when it could have waited for less. [This is
3176 almost certainly not relevant at current processor speeds, where it is
3177 unlikely to ever wait at all. But we try to future-proof.]
3179 5. The function that sleeps for a time interval that includes fractions of a
3180 second contained a race. It did not block SIGALRM between setting the
3181 timer, and suspending (a couple of lines later). If the interval was short
3182 and the sigsuspend() was delayed until after it had expired, the suspension
3183 never ended. On busy systems this could lead to processes getting stuck for
3184 ever.
3186 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3187 process, before it forks any delivery processes. The open lookup caching
3188 mechanism meant that the open file or database connection was passed into
3189 the delivery process. The problem was that delivery processes always tidy
3190 up cached lookup data. This could cause a problem for the next delivery
3191 process started by the queue runner, because the external queue runner
3192 process does not know about the closure. So the next delivery process
3193 still has data in the lookup cache. In the case of a file lookup, there was
3194 no problem because closing a file descriptor in a subprocess doesn't affect
3195 the parent. However, if the lookup was caching a connection to a database,
3196 the connection was closed, and the second delivery process was likely to
3197 see errors such as "PGSQL: query failed: server closed the connection
3198 unexpectedly". The problem has been fixed by closing all cached lookups
3199 in a queue runner before running a delivery process.
3201 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3202 seem to have the "const" qualifier which it has on other OS. I've
3203 parameterised it.
3205 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3206 *of the same type* (client or server) with the same public name that an
3207 error should be diagnosed.
3209 9. When Exim looked up a host name for an IP address, but failed to find the
3210 original IP address when looking up the host name (a safety check), it
3211 output the message "<ip address> does not match any IP for NULL", which was
3212 confusing, to say the least. The bug was that the host name should have
3213 appeared instead of "NULL".
321510. Since release 3.03, if Exim is called by a uid other than root or the Exim
3216 user that is built into the binary, and the -C or -D options is used, root
3217 privilege is dropped before the configuration file is read. In addition,
3218 logging is switched to stderr instead of the normal log files. If the
3219 configuration then re-defines the Exim user, the unprivileged environment
3220 is probably not what is expected, so Exim logs a panic warning message (but
3221 proceeds).
3223 However, if deliver_drop_privilege is set, the unprivileged state may well
3224 be exactly what is intended, so the warning has been cut out in that case,
3225 and Exim is allowed to try to write to its normal log files.
3228Exim version 4.21
3231 1. smtp_return_error_details was not giving details for temporary sender
3232 or receiver verification errors.
3234 2. Diagnose a configuration error if two authenticators have the same public
3235 name.
3237 3. Exim used not to create the message log file for a message until the first
3238 delivery attempt. This could be confusing when incoming messages were held
3239 for policy or load reasons. The message log file is now created at the time
3240 the message is received, and an initial "Received" line is written to it.
3242 4. The automatically generated man page for command line options had a minor
3243 bug that caused no ill effects; however, a more serious problem was that
3244 the procedure for building the man page automatically didn't always
3245 operate. Consequently, release 4.20 contains an out-of-date version. This
3246 shouldn't happen again.
3248 5. When building Exim with embedded Perl support, the script that builds the
3249 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3250 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3252 6. The freeze_tell option was not being used for messages that were frozen on
3253 arrival, either by an ACL or by local_scan().
3255 7. Added the smtp_incomplete_transaction log selector.
3257 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3258 was accepting AUTH without a new EHLO.
3260 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3261 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3262 RFC.
326410. Logging of TCP/IP connections (when configured) now happens in the main
3265 daemon process instead of the child process, so that the TCP/IP connection
3266 count is more accurate (but it can never be perfect).
326811. The use of "drop" in a nested ACL was not being handled correctly in the
3269 outer ACL. Now, if condition failure induced by the nested "drop" causes
3270 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3271 or "require"), the connection is dropped.
327312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3274 that yield "discard" can now be used with an "accept" or a "discard" verb,
3275 but an error is generated for any others (because I can't see a useful way
3276 to define what should happen).
327813. When an ACL is read dynamically from a file (or anywhere else), the lines
3279 are now processed in the same way as lines in the Exim configuration file.
3280 In particular, continuation lines are supported.
328214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
328415. Added -ti meaning -t -i.
328616. Check for letters, digits, hyphens, and dots in the names of dnslist
3287 domains, and warn by logging if others are found.
328917. At least on BSD, alignment is not guarenteed for the array of ifreq's
3290 returned from GIFCONF when Exim is trying to find the list of interfaces on
3291 a host. The code in os.c has been modified to copy each ifreq to an aligned
3292 structure in all cases.
3294 Also, in some cases, the returned ifreq's were being copied to a 'struct
3295 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3296 means the last couple of bytes of an IPv6 address could be chopped if the
3297 ifreq contained only a normal sockaddr (14 bytes storage).
329918. Named domain lists were not supported in the hosts_treat_as_local option.
3300 An entry such as +xxxx was not recognized, and was treated as a literal
3301 domain name.
330319. Ensure that header lines added by a DATA ACL are included in the reject log
3304 if the ACL subsequently rejects the message.
330620. Upgrade the utility script to use Digest::MD5 instead of just
3307 MD5 (which is deprecated).
330921. When testing a filter file using -bf, Exim was writing a message when it
3310 took the sender from a "From " line in the message, but it was not doing so
3311 when it took $return_path from a Return-Path: header line. It now does.
331322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3314 with a valid header line field name (a series of printing characters
3315 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
331723. Changed "disc" in the source to "disk" to conform to the documentation and
3318 the book and for uniformity.
332024. Ignore Sendmail's -Ooption=value command line item.
332225. When execve() failed while trying to run a command in a pipe transport,
3323 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3324 could be confused with a return value of 69 from the command itself. This
3325 has been changed to 127, the value the shell returns if it is asked to run
3326 a non-existent command. The wording for the related log line suggests a
3327 non-existent command as the problem.
332926. If received_header_text expands to an empty string, do not add a Received:
3330 header line to the message. (Well, it adds a token one on the spool, but
3331 marks it "old" so that it doesn't get used or transmitted.)
333327. Installed eximstats 1.28 (addition of -nt option).
333528. There was no check for failure on the call to getsockname() in the daemon
3336 code. This can fail if there is a shortage of resources on the system, with
3337 ENOMEM, for example. A temporary error is now given on failure.
333929. Contrary to the C standard, it seems that in some environments, the
3340 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3341 program. Exim now does this explicitly; it affects the formatting of
3342 timestamps using strftime().
334430. If exiqsumm was given junk data, it threw up some uninitialized variable
3345 complaints. I've now initialized all the variables, to avoid this.
334732. Header lines added by a system filter were not being "seen" during
3348 transport-time rewrites.
335033. The info_callback() function passed to OpenSSL is set up with type void
3351 (*)(SSL *, int, int), as described somewhere. However, when calling the
3352 function (actually a macro) that sets it up, the type void(*)() is
3353 expected. I've put in a cast to prevent warnings from picky compilers.
335534. If a DNS black list lookup found a CNAME record, but there were no A
3356 records associated with the domain it pointed at, Exim crashed.
335835. If a DNS black list lookup returned more than one A record, Exim ignored
3359 all but the first. It now scans all returned addresses if a particular IP
3360 value is being sought. In this situation, the contents of the
3361 $dnslist_value variable are a list of all the addresses, separated by a
3362 comma and a space.
336436. Tightened up the rules for host name lookups using reverse DNS. Exim used
3365 to accept a host name and all its aliases if the forward lookup for any of
3366 them yielded the IP address of the incoming connection. Now it accepts only
3367 those names whose forward lookup yields the correct IP address. Any other
3368 names are discarded. This closes a loophole whereby a rogue DNS
3369 administrator could create reverse DNS records to break through a
3370 wildcarded host restriction in an ACL.
337237. If a user filter or a system filter that ran in a subprocess used any of
3373 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3374 the wrong values were passed to the pipe command ($thisaddress had the
3375 value of $0, $0 had the value of $1, etc). This bug was introduced by
3376 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
337838. Improved the line breaking for long SMTP error messages from ACLs.
3379 Previously, if there was no break point between 40 and 75 characters, Exim
3380 left the rest of the message alone. Two changes have been made: (a) I've
3381 reduced the minimum length to 35 characters; (b) if it can't find a break
3382 point between 35 and 75 characters, it looks ahead and uses the first one
3383 that it finds. This may give the occasional overlong line, but at least the
3384 remaining text gets split now.
338639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3387 file descriptors might be low, and that setting 1000 would always raise it.
3388 It turns out that in some environments, the limit is already over 1000 and
3389 that lowering it causes trouble. So now Exim takes care not to decrease it.
339140. When delivering a message, the value of $return_path is set to $sender_
3392 address at the start of routing (routers may change the value). By an
3393 oversight, this default was not being set up when an address was tested by
3394 -bt or -bv, which affected the outcome if any router or filter referred to
3395 $return_path.
339741. The idea of the "warn" ACL verb is that it adds a header or writes to the
3398 log only when "message" or "log_message" are set. However, if one of the
3399 conditions was an address verification, or a call to a nested ACL, the
3400 messages generated by the underlying test were being passed through. This
3401 no longer happens. The underlying message is available in $acl_verify_
3402 message for both "message" and "log_message" expansions, so it can be
3403 passed through if needed.
340542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3406 new expansion $bh_ to give the encoded byte string without charset
3407 translation. Translation happens only if iconv() is available; HAVE_ICONV
3408 indicates this at build time. HEADERS_CHARSET gives the charset to
3409 translate to; headers_charset can change it in the configuration, and
3410 "headers charset" can change it in an individual filter file.
341243. Now that we have a default RFC 2047 charset (see above), the code in Exim
3413 that creates RFC 2047 encoded "words" labels them as that charset instead
3414 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3415 expansion operator; (ii) when Exim creates a From: line for a local
3416 message; (iii) when a header line is rewritten to include a "phrase" part.
341844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3419 buggy, causing it to skip the first lines of messages whose message ID
3420 ended in 'D'. This would not have bitten before Exim release 4.14, because
3421 message IDs were unlikely to end in 'D' before then. The effect was to have
3422 incorrect size information for certain domains.
342445. #include "config.h" was missing at the start of the crypt16.c module. This
3425 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3426 noticed.
342846. If there was a timeout during a "random" callout check, Exim treated it as
3429 a failure of the random address, and carried on sending RSET and the real
3430 address. If the delay was just some slowness somewhere, the response to the
3431 original RCPT would be taken as a response to RSET and so on, causing
3432 mayhem of various kinds.
343447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3435 when I implemented it. It didn't allow for the fact that some option values
3436 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3437 the right test for positive values.
343948. Domain names in DNS records are case-independent. Exim always looks them up
3440 in lower case. Some resolvers return domain names in exactly the case they
3441 appear in the zone file, that is, they may contain uppercase letters. Not
3442 all resolvers do this - some return always lower case. Exim was treating a
3443 change of case by a resolver as a change of domain, similar to a widening
3444 of a domain abbreviation. This triggered its re-routing code and so it was
3445 trying to route what was effectively the same domain again. This normally
3446 caused routing to fail (because the router wouldn't handle the domain
3447 twice). Now Exim checks for this case specially, and just changes the
3448 casing of the domain that it ultimately uses when it transmits the message
3449 envelope.
345149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3452 module.
345450. If a filter generated a file delivery with a non-absolute name (possible if
3455 no home directory exists for the router), the forbid_file option was not
3456 forbidding it.
345851. Added '&' feature to dnslists, to provide bit mask matching in addition to
3459 the existing equality matching.
346152. Exim was using ints instead of ino_t variables in some places where it was
3462 dealing with inode numbers.
346453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3465 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3466 called TMPDIR, and if it finds it is different, it changes its value.
346854. The smtp_printf() function is now made available to local_scan() so
3469 additional output lines can be written before returning. There is also an
3470 smtp_fflush() function to enable the detection of a dropped connection.
3471 The variables smtp_input and smtp_batched_input are exported to
3472 local_scan().
347455. Changed the default runtime configuration: the message "Unknown user"
3475 has been removed from the ACL, and instead placed on the localuser router,
3476 using the cannot_route_message feature. This means that any verification
3477 failures that generate their own messages won't get overridden. Similarly,
3478 the "Unrouteable address" message that was in the ACL for unverifiable
3479 relay addresses has also been removed.
348156. Added hosts_avoid_esmtp to the smtp transport.
348357. The exicyclog script was not checking for the esoteric option
3484 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3485 will work only if exicyclog is run under the appropriate euid.
348758. Following a discussion on the list, the rules by which Exim recognises line
3488 endings on incoming messages have been changed. The -dropcr and drop_cr
3489 options are now no-ops, retained only for backwards compatibility. The
3490 following line terminators are recognized: LF CRLF CR. However, special
3491 processing applies to CR:
3493 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3494 nor a local message in the state where . is a terminator.
3496 (ii) If a bare CR is encountered in a header line, an extra space is added
3497 after the line terminator so as not to end the header. The reasoning
3498 behind this is that bare CRs in header lines are most likely either
3499 to be mistakes, or people trying to play silly games.
350159. The size of a message, as listed by "-bp" or in the Exim monitor window,
3502 was being incorrectly given as 18 bytes larger than it should have been.
3503 This is a VOB (very old bug).
350560. This may never have affected anything current, but just in case it has:
3506 When the local host is found other than at the start of a list of hosts,
3507 the local host, those with the same MX, and any that follow, are discarded.
3508 When the list in question was part of a longer list of hosts, the following
3509 hosts (not currently being processed) were also being discarded. This no
3510 longer happens. I'm not sure if this situation could ever has previously
3511 arisen.
351361. Added the "/MX" feature to lists of hosts in the manualroute and query
3514 program routers.
351662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3517 header. This is something that is recommended in a new Internet Draft, and
3518 is something that is documented as being done by Sendmail. There are two
3519 possible values. For messages generated by the autoreply transport, Exim
3520 adds:
3522 Auto-Submitted: auto-replied
3524 whereas for all other generated messages (e.g. bounces) it adds
3526 Auto-Submitted: auto-generated
352863. The "personal" condition in filters now includes a test for the
3529 Auto-Submitted: header. If it contains the string "auto-" the message it
3530 not considered personal.
353264. Added rcpt_include_affixes as a generic transport option.
353465. Added queue_only_override (default true).
353666. Added the syslog_duplication option.
353867. If what should have been the first header line of a message consisted of
3539 a space followed by a colon, Exim was mis-interpreting it as a header line.
3540 It isn't of course - it is syntactically invalid and should therefore be
3541 treated as the start of the message body. The misbehaviour could have
3542 caused a number of strange effects, including loss of data in subsequent
3543 header lines, and spool format errors.
354568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3546 client host had authenticated. This control can now be exercised by an ACL
3547 for more flexibility.
354969. By default, callouts do not happen when testing with -bh. There is now a
3550 variant, -bhc, which does actually run the callout code, including
3551 consulting and updating the callout cache.
355370. Added support for saslauthd authentication, courtesy of Alexander
3554 Sabourenkov.
355671. If statvfs() failed on the spool or log directories while checking their
3557 size for availability, Exim confusingly gave the error "space shortage".
3558 Furthermore, in debugging mode it crashed with a floating point exception.
3559 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3560 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3561 serious problem, Exim now writes to the main and panic logs when this
3562 happens, with details of the failure. It then refuses to accept the
3563 incoming message, giving the message "spool directory problem" or "log
3564 directory problem" with a 421 code for SMTP messages.
356672. When Exim is about to re-exec itself, it ensures that the file descriptors
3567 0, 1, and 2 exist, because some OS complain for execs without them (see
3568 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3569 descriptors. However, the code omitted to check that the open succeeded,
3570 causing mysterious errors if for some reason the permissions on /dev/null
3571 got screwed. Now Exim writes a message to the main and panic logs, and
3572 bombs out if it can't open /dev/null.
357473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3575 interact so that it is all more flexible. It is supposed to remain
3576 backwards compatible. Also added extra_local_interfaces.
357874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3579 to bomb out with an assertion failure - to the client this appears as a
3580 connection drop. This problem occurs in the part of the code that was taken
3581 from the Samba project. Fortunately, the assertion is in a very simple
3582 function, so I have fixed this by reproducing the function inline in the
3583 one place where it is called, and arranging for authentication to fail
3584 instead of killing the process with assert().
358675. The SPA client code was not working when the server requested OEM rather
3587 than Unicode encoding.
358976. Added code to make require_files with a specific uid setting more usable in
3590 the case where statting the file as root fails - usually a non-root-mounted
3591 NFS file system. When this happens and the failure is EACCES, Exim now
3592 forks a subprocess and does the per-uid checking as the relevant uid.
359477. Added process_log_path.
359678. If log_file_path was not explicitly set, a setting of check_log_space or
3597 check_log_inodes was ignored.
359979. If a space check for the spool or log partitions fails, the incident is now
3600 logged. Of course, in the latter case the data may get lost...
360280. Added the %p formatting code to string_format() so that it can be used to
3603 print addresses in debug_print(). Adjusted all the address printing in the
3604 debugging in store.c to use %p rather than %d.
360681. There was a concern that a line of code in smtp_in.c could overflow a
3607 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3608 initially expressed, the concern was not well-founded, because trailing
3609 spaces are removed early. However, if the trailing spaces were followed by
3610 a NULL, they did not get removed, so the overflow was possible. Two fixes
3611 were applied:
3613 (a) I re-wrote the offending code in a cleaner fashion.
3614 (b) If an incoming SMTP command contains a NULL character, it is rejected
3615 as invalid.
361782. When Exim changes uid/gid to the Exim user at daemon start time, it now
3618 runs initgroups(), so that if the Exim user is in any additional groups,
3619 they will be used during message reception.
3622Exim version 4.20
3625The change log for 4.20 and earlier releases has been archived.