Treat ECONNRESET the same as an end-of-file indication.
[exim.git] / doc / doc-txt / ChangeLog
19b9dc85 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.282 2005/12/22 14:54:50 ph10 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
55PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
56 syntactically invalid From: or Reply-to: line, and a filter used this to
57 generate an autoreply, and therefore failed to obtain an address for the
58 autoreply, Exim could try to deliver to a non-existent relative file
59 name, causing unrelated and misleading errors. What now happens is that
60 it logs this as a hard delivery error, but does not attempt to create a
61 bounce message.
63PH/11 The exinext utility has a -C option for testing purposes, but although
64 the given file was scanned by exinext itself; it wasn't being passed on
65 when Exim was called.
67PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
68 an end-of-file indication when reading a command response.
214e2000 70
71Exim version 4.60
74PH/01 Two changes to the default runtime configuration:
76 (1) Move the checks for relay_from_hosts and authenticated clients from
77 after to before the (commented out) DNS black list checks.
79 (2) Add control=submission to the relay_from_hosts and authenticated
80 clients checks, on the grounds that messages accepted by these
81 statements are most likely to be submissions.
5de37277 82
83PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
85 (1) Generate an error if the third argument for the ${prvs expansion is
86 not a single digit.
88 (2) Treat a missing third argument of ${prvscheck as if it were an empty
89 string.
91 (3) Reset the variables that are obtained from the first argument of
92 ${prvscheck and used in the second argument before leaving the code,
93 because their memory is reclaimed, so using them afterwards may do
94 silly things.
96 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
97 one (it's much easier than Tom thought :-).
99 (5) Because of (4), we can now allow for the use of $prvscheck_result
100 inside the third argument.
cb9328de 101
102PH/03 For some reason, the default setting of PATH when running a command from
103 a pipe transport was just "/usr/bin". I have changed it to
104 "/bin:/usr/bin".
107 anything to be listed in the output from -bV.
b2f5a032 108
109PH/05 When a filter generated an autoreply, the entire To: header line was
110 quoted in the delivery log line, like this:
112 => >A.N.Other <ano@some.domain> <original@ddress> ...
114 This has been changed so that it extracts the operative address. There
115 may be more than one such address. If so, they are comma-separated, like
116 this:
118 => >ano@some.domain,ona@other.domain <original@ddress> ...
120PH/06 When a client host used a correct literal IP address in a HELO or EHLO
121 command, (for example, EHLO []) and the client's IP address was
122 not being looked up in the rDNS to get a host name, Exim was showing the
123 IP address twice in Received: lines, even though the IP addresses were
124 identical. For example:
126 Received: from [] (helo=[])
128 However, if the real host name was known, it was omitting the HELO data
129 if it matched the actual IP address. This has been tidied up so that it
130 doesn't show the same IP address twice.
132PH/07 When both +timestamp and +memory debugging was on, the value given by
133 $tod_xxx expansions could be wrong, because the tod_stamp() function was
134 called by the debug printing, thereby overwriting the timestamp buffer.
135 Debugging no longer uses the tod_stamp() function when +timestamp is set.
137PH/08 When the original message was included in an autoreply transport, it
138 always said "this is a copy of the message, including all the headers",
139 even if body_only or headers_only was set. It now gives an appropriate
140 message.
142PH/09 Applied a patch from the Sieve maintainer which:
144 o fixes some comments
145 o adds the (disabled) notify extension core
146 o adds some debug output for the result of if/elsif tests
147 o points to the current vacation draft in the documentation
148 and documents the missing references header update
150 and most important:
152 o fixes a bug in processing the envelope test (when testing
153 multiple envelope elements, the last element determinted the
154 result)
156PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
157 Electronic Mail") by including:
159 Auto-submitted: auto-generated
161 in the messages that it generates (bounce messages and others, such as
162 warnings). In the case of bounce messages for non-SMTP mesages, there was
163 also a typo: it was using "Auto_submitted" (underscore instead of
164 hyphen). Since every message generated by Exim is necessarily in response
165 to another message, thes have all been changed to:
167 Auto-Submitted: auto-replied
169 in accordance with these statements in the RFC:
171 The auto-replied keyword:
173 - SHOULD be used on messages sent in direct response to another
174 message by an automatic process,
176 - MUST NOT be used on manually-generated messages,
178 - MAY be used on Delivery Status Notifications (DSNs) and Message
179 Disposition Notifications (MDNs),
181 - MUST NOT be used on messages generated by automatic or periodic
182 processes, except for messages which are automatic responses to
183 other messages.
185PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
186 to the default Received: header definition.
456682f5 187
188PH/12 Added log selector acl_warn_skipped (default on).
190PH/13 After a successful wildlsearch lookup, discard the values of numeric
191 variables because (a) they are in the wrong storage pool and (b) even if
192 they were copied, it wouldn't work properly because of the caching.
194PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
195 checking when decoding. Apparently there are clients that generate
196 overlong encoded strings. Why am I not surprised?
198PH/15 If the first argument of "${if match_address" was not empty, but did not
199 contain an "@" character, Exim crashed. Now it writes a panic log message
200 and treats the condition as false.
202PH/16 In autoreply, treat an empty string for "once" the same as unset.
204PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
205 extension "envelope-auth". The code is finished and in agreement with
206 other implementations, but there is no documentation so far and in fact,
207 nobody wrote the draft yet. This extension is currently #undef'ed, thus
208 not changing the active code.
210 Print executed "if" and "elsif" statements when debugging is used. This
211 helps a great deal to understand what a filter does.
213 Document more things not specified clearly in RFC3028. I had all this
214 sorted out, when out of a sudden new issues came to my mind. Oops."
216PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
217 (Bugzilla #53).
219PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
220 canonical form (as documented). However, after a host name lookup from
221 the IP address, check_host() was doing a simple string comparison with
222 addresses acquired from the DNS when checking that the found name did
223 have the original IP as one of its addresses. Since any found IPv6
224 addresses are likely to be in abbreviated form, the comparison could
225 fail. Luckily, there already exists a function for doing the comparison
226 by converting both addresses to binary, so now that is used instead of
227 the text comparison.
229PH/20 There was another similar case to PH/19, when a complete host name was
230 given in a host list; looking up its IP address could give an abbreviated
231 form, whereas the current host's name might or might not be abbreviated.
232 The same fix has been applied.
5de37277 234
235Exim version 4.54
238PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
239 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
240 It now does.
242PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
243 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
245PH/03 Typo: missing ".o" in src/pcre/Makefile.
247PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
248 header line, restrict the check to what is listed in RFCs 2369 and 2929.
249 Also, for "Auto-Submitted", treat anything other than "no" as
250 non-personal, in accordance with RFC 3834. (Previously it treated
251 anything starting "auto-" as non-personal.)
253TF/01 The control=submission/name=... option had a problem with syntax
254 errors if the name included a slash character. The /name= option
255 now slurps the rest of the string, so it can include any characters
256 but it must come last in the list of options (after /sender_retain
257 or /domain=).
259PH/05 Some modifications to the interface to the fake nameserver for the new
260 testing suite.
3e46c1aa 262
9a799bc0 263
264Exim version 4.53
267TK/01 Added the "success_on_redirect" address verification option. See
268 NewStuff for rationale and an example.
270PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
272PH/02 Patch to exigrep to allow it to work on syslog lines.
274PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
275 fread() to skip over the body file's header line, because in Cygwin the
276 header line is locked and is inaccessible.
278PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
279 co-exist for some time) to make it clear that it is the Exim ID that is
280 referenced, not the Message-ID: header line.
282PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
283 string_format() function, because snprintf() does not exist on all
284 operating systems.
286PH/06 The use of forbid_filter_existstest now also locks out the use of the
287 ${stat: expansion item.
289PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
290 protocol synchronization error", to keep the pedants happy.
292PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
293 well as for IRIX systems, when gcc is being used. See the host.c source
294 file for comments.
296PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
298PH/10 Named domain lists were not working if used in a queue_smtp_domains
299 setting.
301PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
302 transport and to the smtp transport in LMTP mode.
304TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
306PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
307 run a filter in a subprocess. This could lead to confusion in subsequent
308 lookups in the parent process. There should also be a search_tidyup() at
309 the end of the subprocess.
311PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
312 only if the host matched helo_try_verify_hosts, which caused the
313 verification to occur when the EHLO/HELO command was issued. The ACL just
314 tested the remembered result. Now, if a previous verification attempt has
315 not happened, "verify = helo" does it there and then.
317JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
319TK/03 Fix log output including CR from clamd.
321PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
322 exist provoked a memory error which could cause a segfault.
324PH/15 Installed PCRE 6.2
326PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
328PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
329 of the problem. Specifically, suggested +O2 rather than +O1 for the
330 HP-UX compiler.
332PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
334PH/20 If a delivery was routed to a non-standard port by means of an SRV
335 record, the port was not correctly logged when the outgoing_port log
336 selector was set (it logged the transort's default port).
338PH/21 Added support for host-specific ports to manualroute, queryprogram,
339 fallback_hosts, and "hosts" in the smtp transport.
341PH/22 If the log selector "outgoing_port" is set, the port is now also given on
342 host errors such as "Connection refused".
344PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
345 authentication with radiusclient 0.4.9:
347 - Error returned from rc_read_config was caught wrongly
348 - Username/password not passed on to radius server due to wrong length.
350 The presumption is that some radiusclient API changes for 4.51/PH/17
351 were not taken care of correctly. The code is still untested by me (my
352 Linux distribution still has 0.3.2 of radiusclient), but it was
353 contributed by a Radius user.
355PH/24 When doing a callout, the value of $domain wasn't set correctly when
356 expanding the "port" option of the smtp transport.
358TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
359 while reading a MIME header. Thanks to Tom Hughes for a patch.
361PH/24 Include config.h inside local_scan.h so that configuration settings are
362 available.
364PH/25 Make $smtp_command_argument available after all SMTP commands. This means
365 that in an ACL for RCPT (for example), you can examine exactly what was
366 received.
368PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
369 commands, but it was not correctly comparing the address with the actual
370 client host address. Thus, it would show the EHLO address in Received:
371 header lines when this was not necessary.
373PH/27 Added the % operator to ${eval:}.
375PH/28 Exim tries to create and chdir to its spool directory when it starts;
376 it should be ignoring failures (because with -C, for example, it has lost
377 privilege). It wasn't ignoring creation failures other than "already
378 exists".
380PH/29 Added "crypteq" to the list of supported features that Exim outputs when
381 -bV or -d is used.
383PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
384 because an input line was too long, either on its own, or by virtue of
385 too many continuations, the temporary file was not being removed, and the
386 return code was incorrect.
aa2b5c79 387
388PH/31 Missing "BOOL" in function definition in filtertest.c.
390PH/32 Applied Sieve patches from the maintainer.
392TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
394PH/33 Added "verify = not_blind".
396PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
397 Local/Makefile (with some defaults set). These are used in built scripts
398 such as exicyclog, but they have never been used in the exim_install
399 script (though there are many overriding facilities there). I have
400 arranged that the exim_install script now takes note of these two
401 settings.
403PH/35 Installed configuration files for Dragonfly.
405PH/36 When a locally submitted message by a trusted user did not contain a
406 From: header, and the sender address was obtained from -f or from an SMTP
407 MAIL command, and the trusted user did not use -F to supply a sender
408 name, $originator_name was incorrectly used when constructing a From:
409 header. Furthermore, $originator_name was used for submission mode
410 messages from external hosts without From: headers in a similar way,
411 which is clearly wrong.
413PH/37 Added control=suppress_local_fixups.
415PH/38 When log_selector = +received_sender was set, and the addition of the
416 sender made the log line's construction buffer exactly full, or one byte
417 less than full, an overflow happened when the terminating "\n" was
418 subsequently added.
420PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
421 when the result of a list match is failure because a DNS lookup failed.
423PH/40 RM_COMMAND is now used in the building process.
425PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
426 the "build-* directories that it finds.
428PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
429 address in a domain literal was a prefix of an interface address.
431PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
432 when verifying a sender address, unless rewrite_headers is false.
434PH/44 Wrote a long comment about why errors_to addresses are verified as
435 recipients, not senders.
437TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
438 the ratelimit ACL was added.
440PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
442PH/46 Added extra information about PostgreSQL errors to the error string.
444PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
445 avoiding the need to install special zones in a real server. This is
446 backwards compatible; if it can't find the fake resolver, it drops back.
447 Thus, both old and new test suites can be run.
449TF/02 Added util/
451TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
452 clock is set back in time.
454TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
455 Candler <>.
457TF/05 The fix for PH/43 was not completely correct; widen_domains is always
458 OK for addresses that are the result of redirections.
460PH/48 A number of further additions for the benefit of the new test suite,
461 including a fake gethostbyname() that interfaces to the fake DNS resolver
462 (see PH/47 above).
464TF/06 The fix for widen_domains has also been applied to qualify_single and
465 search_parents which are the other dnslookup options that can cause
466 header rewrites.
468PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
469 type ("H").
471PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
473TF/07 Exim produced the error message "an SRV record indicated no SMTP
474 service" if it encountered an MX record with an empty target hostname.
475 The message is now "an MX or SRV record indicated no SMTP service".
477TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
478 if the DNS of the sending site is misconfigured. This is quite a
479 common situation. This change restores the behaviour of treating a
480 helo verification defer as a failure.
482PH/51 If self=fail was set on a router, the bounce message did not include the
483 actual error message.
bbe902f0 485
486Exim version 4.52
489TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
491PH/01 When a transport filter timed out in a pipe delivery, and the pipe
492 command itself ended in error, the underlying message about the transport
493 filter timeout was being overwritten with the pipe command error. Now the
494 underlying error message should be appended to the second error message.
496TK/01 Fix poll() being unavailable on Mac OSX 10.2.
498PH/02 Reduce the amount of output that "make" produces by default. Full output
499 can still be requested.
501PH/03 The warning log line about a condition test deferring for a "warn" verb
502 was being output only once per connection, rather than after each
503 occurrence (because it was using the same function as for successful
504 "warn" verbs). This seems wrong, so I have changed it.
506TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
507 it should not have, which might have caused a crash in the right
508 circumstances, but probably never did.
510PH/04 Installed a modified version of Tony Finch's patch to make submission
511 mode fix the return path as well as the Sender: header line, and to
512 add a /name= option so that you can make the user's friendly name appear
513 in the header line.
515TF/03 Added the control = fakedefer ACL modifier.
517TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
518 Mark Lowes for thorough testing.
870f6ba8 519
520TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
522TK/03 Merged latest SRS patch from Miles Wilton.
524PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
525 with the definition in sysexits.h (which is #included earlier).
526 Fortunately, Exim does not actually use EX_OK. The code used to try to
527 preserve the sysexits.h value, by assumimg that macro definitions were
528 scanned for macro replacements. I have been disabused of this notion,
529 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 530
531PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
532 in the smtp transport. When a block could not be written in a single
533 write() function, the timeout was being re-applied to each part-write.
534 This seems wrong - if the receiver was accepting one byte at a time it
535 would take for ever. The timeout is now adjusted when this happens. It
536 doesn't have to be particularly precise.
538TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
539 details. Thanks to Chris Webb <> for the patch!
541PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
542 without a domain if the check to <postmaster@domain> fails.
544SC/01 Eximstats: added -xls and the ability to specify output files
545 (patch written by Frank Heydlauf).
547SC/02 Eximstats: use FileHandles for outputing results.
549SC/03 Eximstats: allow any combination of xls, txt, and html output.
551SC/04 Eximstats: fixed display of large numbers with -nvr option
553SC/05 Eximstats: fixed merging of reports with empty tables.
555SC/06 Eximstats: added the -include_original_destination flag
557SC/07 Eximstats: removed tabs and trailing whitespace.
559TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
561TK/06 MBOX spool code: Add real "From " MBOX separator line
562 so the .eml file is really in mbox format (even though
563 most programs do not really care). Patch from Alex Miller.
565TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
566 The latter is generated from $received_to and is only set if the
567 message has one envelope recipient. SA can use these headers,
568 obviously out-of-the-box. Patch from Alex Miller.
570PH/08 The ${def test on a variable was returning false if the variable's
571 value was "0", contrary to what the specification has always said!
572 The result should be true unless the variable is empty.
574PH/09 The syntax error of a character other than { following "${if
575 def:variable_name" (after optional whitespace) was not being diagnosed.
576 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
577 accidental colon was present, for example, could give incorrect results.
579PH/10 Tidied the code in a number of places where the st_size field of a stat()
580 result is used (not including appendfile, where other changes are about
581 to be made).
583PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
584 This involved changing a lot of size variables from int to off_t. It
585 should work with maildirs and everything.
587TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
588 spamd dying while we are connected to it.
590TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
591 <>
593PH/12 Applied Alex Kiernan's patch for the API change for the error callback
594 function for BDB 4.3.
596PH/13 Changed auto_thaw such that it does not apply to bounce messages.
598PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
599 the sources for PCRE have been re-arranged and more files are now
600 involved.
602PH/15 The code I had for printing potentially long long variables in PH/11
603 above was not the best (it lost precision). The length of off_t variables
604 is now inspected at build time, and an appropriate printing format (%ld
605 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
606 to be "long long int" or "long int". This is needed for the internal
607 formatting function string_vformat().
b1c749bb 608
609PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
610 the configuration file to be ":syslog", then the script "guesses" where
611 the logs files are, rather than using the compiled in default. In our
612 case the guess is not the same as the compiled default, so the script
613 suddenly stopped working when I started to use syslog. The patch checks
614 to see if log_file_path is "". If so, it attempts to read it from exim
615 with no configuration file to get the compiled in version, before it
616 falls back to the previous guessing code."
618TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
619 implementing BATV in an Exim configuration. See NewStuff for the gory
620 details.
622PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
623 Makefile that are specific to HP-UX.
625PH/18 If the "use_postmaster" option was set for a recipient callout together
626 with the "random" option, the postmaster address was used as the MAIL
627 FROM address for the random test, but not for the subsequent recipient
628 test. It is now used for both.
630PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
631 patch removes a few documentation additions to RFC 3028, because the
632 latest draft now contains them. It adds the new en;ascii-case comparator
633 and a new error check for 8bit text in MIME parts. Comparator and
634 require names are now matched exactly. I enabled the subaddress
635 extension, but it is not well tested yet (read: it works for me)."
637PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
638 rework some of the code of TK/09 above to avoid the hardwired use of
639 "%lld" and "long long". Replaced the call to snprintf() with a call to
640 string_vformat().
642PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
643 records point to non-existent hosts", "retry timeout exceeded", and
644 "retry time not reached for any host after a long failure period".
ca02eafb 645
646PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
647 experimental DomainKeys support:
649 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
650 (2) On an error such as an illegally used "control", the wrong name for
651 the control was given.
653 These problems did NOT occur unless DomainKeys support was compiled.
655PH/23 Added daemon_startup_retries and daemon_startup_sleep.
657PH/24 Added ${if match_ip condition.
659PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
660 databases so that it will be absolutely obvious if a crash occurs in the
661 DB library. This is a regular occurrence (often caused by mis-matched
662 db.h files).
ff790e47 664PH/26 Insert a lot of missing (void) casts for functions such as chown(),
665 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
666 picked up on a user's system that detects such things. There doesn't seem
667 to be a gcc warning option for this - only an attribute that has to be
668 put on the function's prototype. It seems that in Fedora Core 4 they have
669 set this on a number of new functions. No doubt there will be more in due
670 course.
ff790e47 671
672PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
673 specify a transport. However, if an address that was verified by such a
674 router was the subject of a callout, Exim crashed because it tried to
675 read the rcpt_include_affixes from the non-existent transport. Now it
676 just assumes that the setting of that option is false. This bug was
677 introduced by 4.51/PH/31.
679PH/28 Changed -d+all to exclude +memory, because that information is very
680 rarely of interest, but it makes the output a lot bigger. People tend to
681 do -d+all out of habit.
683PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
684 code in os-type was giving problems when lives in lib64, like on
685 x86_64 Fedora Core.
687PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
688 aren't the modern standard, and it seems that some systems' include files
689 don't always have them. Exim was already checking for some of the newer
690 ones like T_AAAA, and defining it itself. I've added checks for all the
691 record types that Exim uses.
693PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
694 not automatically generating a new one, as it is supposed to. This
695 prevented TLS from working. If the file did exist, but contained invalid
696 data, a new version was generated, as expected. It was only the case of a
697 non-existent file that was broken.
699TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
700 with a change in libdomainkeys > 0.64.
702TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
703 from DNS. If the selector record carries the flag, it now has
704 precedence over the domain-wide flag.
706TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
708PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
709 the use of a port name that isn't defined in /etc/services) occurred, the
710 message was deferred as in a normal delivery, and thus remained on the
711 spool, instead of being failed because of the mua_wrapper setting. This
712 is now fixed, and I tidied up some of the mua_wrapper messages at the
713 same time.
715SC/08 Eximstats: whilst parsing the mainlog(s), store information about
716 the messages in a hash of arrays rather than using individual hashes.
717 This is a bit cleaner and results in dramatic memory savings, albeit
718 at a slight CPU cost.
720SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
721 as requested by Marc Sherman.
723SC/10 Eximstats: added histograms for user specified patterns as requested
724 by Marc Sherman.
726SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
728PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
729 fopen() in the content-scanning modules that did not already have it.
e7ad8a65 731
732Exim version 4.51
735TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
736 doc/experimental-spec.txt for details. (
2f079f46 738TK/02 Fix ACL "control" statement not being available in MIME ACL.
740TK/03 Fix ACL "regex" condition not being available in MIME ACL.
742PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
743 to test Sieve filters that use "vacation".
745PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
746 that changes the way the GnuTLS parameters are stored in the cache file.
747 The new format can be generated externally. For backward compatibility,
748 if the data in the cache doesn't make sense, Exim assumes it has read an
749 old-format file, and it generates new data and writes a new file. This
750 means that you can't go back to an older release without removing the
751 file.
753PH/03 A redirect router that has both "unseen" and "one_time" set does not
754 work if there are any delivery delays because "one_time" forces the
755 parent to be marked "delivered", so its unseen clone is never tried
756 again. For this reason, Exim now forbids the simultaneous setting of
757 these two options.
759PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
760 redirected to themselves ("homonym" addresses). Read the long ChangeLog
761 entry if you want to know the details. The fix, however, neglected to
762 consider the case when local delivery batching is involved. The test for
763 "previously delivered" was not happening when checking to see if an
764 address could be batched with a previous (undelivered) one; under
765 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 766 address.
768PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
769 in its include files, and this causes problems building Exim.
771PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
772 header_syntax) but Exim was just ignoring anything given after a slash.
773 In particular, this caused confusion with an attempt to use "verify =
774 reverse_host_lookup/defer_ok". An error is now given when options are
775 supplied for verify items that do not have them. (Maybe reverse_host_
776 lookup should have a defer_ok option, but that's a different point.)
778PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
779 defined by RFC 821) to 2048, because there were problems with some AUTH
780 commands, and RFC 1869 says the size should be increased for extended
781 SMTP commands that take arguments.
783PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
784 Finch).
786PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
787 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 788
789PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
790 an address' error message when a string expansion fails (syntax or
791 whatever). Otherwise the password may appear in the log. Following change
792 PH/42 below, there is no longer a chance of it appearing in a bounce
793 message.
49c2d5ea 794
795PH/11 Installed exipick version 20050225.0 from John Jetmore.
797PH/12 If the last host in a fallback_hosts list was multihomed, only the first
798 of its addresses was ever tried. (Bugzilla bug #2.)
800PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
801 the result incorrectly in the debug output. (It correctly added a newline
802 to what was transported.)
804TF/01 Added $received_time.
806PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
807 commented out examples of how to interface to a virus scanner and to
808 SpamAssassin. Also added commented examples of av_scanner and
809 spamd_address settings.
811PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
812 and controls are allowed in which ACLs. There were a couple of minor
813 errors. Some of the entries in the conditions table (which is a table of
814 where they are NOT allowed) were getting very unwieldy; rewrote them as a
815 negation of where the condition IS allowed.
817PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
819PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
820 header file does not have a version number, so I've had to invent a new
821 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
822 API. The code is untested by me (my Linux distribution still has 0.3.2 of
823 radiusclient), but it was contributed by a Radius user.
825PH/18 Installed Lars Mainka's patch for the support of CRL collections in
826 files or directories, for OpenSSL.
828PH/19 When an Exim process that is running as root has to create an Exim log
829 file, it does so in a subprocess that runs as exim:exim so as to get the
830 ownership right at creation (otherwise, other Exim processes might see
831 the file with the wrong ownership). There was no test for failure of this
832 fork() call, which would lead to the process getting stuck as it waited
833 for a non-existent subprocess. Forks do occasionally fail when resources
834 run out. I reviewed all the other calls to fork(); they all seem to check
835 for failure.
837PH/20 When checking for unexpected SMTP input at connect time (before writing
838 the banner), Exim was not dealing correctly with a non-positive return
839 from the read() function. If the client had disconnected by this time,
840 the result was a log entry for a synchronization error with an empty
841 string after "input=" when read() returned zero. If read() returned -1
842 (an event I could not check), uninitialized data bytes were printed.
843 There were reports of junk text (parts of files, etc) appearing after
844 "input=".
846PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
848PH/22 Added support for macro redefinition, and (re)definition in between
849 driver and ACL definitions.
851PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
852 forgetting to use the resulting value; it was using the unexpanded value.
854PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
855 hadn't been configured. The fix is from Juergen Kreileder, who
856 understands it better than I do:
858 "Here's what I see happening with three configured cyrus_sasl
859 authenticators configured (plain, login, cram-md5):
861 On startup auth_cyrus_sasl_init() gets called for each of these.
862 This means three calls to sasl_listmech() without a specified mech_list.
863 => SASL tests which mechs of all available mechs actually work
864 => three warnings about OTP not working
865 => the returned list contains: plain, login, cram-md5, digest-md5, ...
867 With the patch, sasl_listmech() also gets called three times. But now
868 SASL's mech_list option is set to the server_mech specified in the the
869 authenticator. Or in other words, the answer from sasl_listmech()
870 gets limited to just the mech you're testing for (which is different
871 for each call.)
872 => the return list contains just 'plain' or 'login', 'cram-md5' or
873 nothing depending on the value of ob->server_mech.
875 I've just tested the patch: Authentication still works fine,
876 unavailable mechs specified in the exim configuration are still
877 caught, and the auth.log warnings about OTP are gone."
879PH/25 When debugging is enabled, the contents of the command line are added
880 to the debugging output, even when log_selector=+arguments is not
881 specified.
883PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
884 answer is "GNU", and only if the return is "GNU/something" is the answer
885 "Linux".
887PH/27 $acl_verify_message is now set immediately after the failure of a
888 verification in an ACL, and so is available in subsequent modifiers. In
889 particular, the message can be preserved by coding like this:
891 warn !verify = sender
892 set acl_m0 = $acl_verify_message
894 Previously, $acl_verify_message was set only while expanding "message"
895 and "log_message" when a very denied access.
897PH/28 Modified OS/os.c-Linux with
899 -#ifndef OS_LOAD_AVERAGE
900 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
902 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
903 nomenclature these days.)
905PH/29 Installed patch from the Sieve maintainer that adds the options
906 sieve_useraddress and sieve_subaddress to the redirect router.
908PH/30 In these circumstances:
909 . Two addresses routed to the same list of hosts;
910 . First host does not offer TLS;
911 . First host accepts first address;
912 . First host gives temporary error to second address;
913 . Second host offers TLS and a TLS session is established;
914 . Second host accepts second address.
915 Exim incorrectly logged both deliveries with the TLS parameters (cipher
916 and peerdn, if requested) that were in fact used only for the second
917 address.
7e8bec7a 918
919PH/31 When doing a callout as part of verifying an address, Exim was not paying
920 attention to any local part prefix or suffix that was matched by the
921 router that accepted the address. It now behaves in the same way as it
922 does for delivery: the affixes are removed from the local part unless
923 rcpt_include_affixes is set on the transport.
925PH/32 Add the sender address, as F=<...>, to the log line when logging a
926 timeout during the DATA phase of an incoming message.
928PH/33 Sieve envelope tests were broken for match types other than :is. I have
929 applied a patch sanctioned by the Sieve maintainer.
c688b954 930
931PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
932 the uid or gid is negative. A case of a negative gid caused this to be
933 noticed. The fix allows for either to be negative.
935PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
936 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
937 overlooked.
939PH/36 The change PH/12 above was broken. Fixed it.
941PH/37 Exim used to check for duplicate addresses in the middle of routing, on
942 the grounds that routing the same address twice would always produce the
943 same answer. This might have been true once, but it is certainly no
944 longer true now. Routing a child address may depend on the previous
945 routing that produced that child. Some complicated redirection strategies
946 went wrong when messages had multiple recipients, and made Exim's
947 behaviour dependent on the order in which the addresses were given.
949 I have moved the duplicate checking until after the routing is complete.
950 Exim scans the addresses that are assigned to local and remote
951 transports, and removes any duplicates. This means that more work will be
952 done, as duplicates will always all be routed, but duplicates are
953 presumably rare, so I don't expect this is of any significance.
955 For deliveries to pipes, files, and autoreplies, the duplicate checking
956 still happens during the routing process, since they are not going to be
957 routed further.
959PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
960 It corrects a timeout issue with spamd. This is Ian's comment: "The
961 background is that sometimes spamd either never reads data from a
962 connection it has accepted, or it never writes response data. The exiscan
963 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
964 blindly assumes that writes won't block so it may never time out."
966PH/39 Allow G after quota size as well as K and M.
968PH/40 The value set for $authenticated_id in an authenticator may not contain
969 binary zeroes or newlines because the value is written to log lines and
970 to spool files. There was no check on this. Now the value is run through
971 the string_printing() function so that such characters are converted to
972 printable escape sequences.
974PH/41 $message_linecount is a new variable that contains the total number of
975 lines in the message. Compare $body_linecount, which is the count for the
976 body only.
978PH/42 Exim no longer gives details of delivery errors for specific addresses in
979 bounce and delay warning messages, except in certain special cases, which
980 are as follows:
982 (a) An SMTP error message from a remote host;
983 (b) A message specified in a :fail: redirection;
984 (c) A message specified in a "fail" command in a system filter;
985 (d) A message specified in a FAIL return from the queryprogram router;
986 (e) A message specified by the cannot_route_message router option.
988 In these cases only, Exim does include the error details in bounce and
989 warning messages. There are also a few cases where bland messages such
990 as "unrouteable address" or "local delivery error" are given.
992PH/43 $value is now also set for the "else" part of a ${run expansion.
994PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
995 being worked on, but at least Exim now implements the latest version to
996 play with."
998PH/45 In a pipe transport, although a timeout while waiting for the pipe
999 process to complete was treated as a delivery failure, a timeout while
1000 writing the message to the pipe was logged, but erroneously treated as a
1001 successful delivery. Such timeouts include transport filter timeouts. For
1002 consistency with the overall process timeout, these timeouts are now
1003 treated as errors, giving rise to delivery failures by default. However,
1004 there is now a new Boolean option for the pipe transport called
1005 timeout_defer, which, if set TRUE, converts the failures into defers for
1006 both kinds of timeout. A transport filter timeout is now identified in
1007 the log output.
1009PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1010 systems where "make" and "gmake" are different, calling "gmake" at top
1011 level broke things. I've arranged for the value of $(MAKE) to be passed
1012 from the Makefile to this script so that it can call the same version of
1013 "make".
7982096b 1015
1016A note about Exim versions 4.44 and 4.50
1019Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1020changes of various kinds. As a consequence, a big documentation update was
1021needed. This delayed the release for rather longer than seemed good, especially
1022in the light of a couple of (minor) security issues. Therefore, the changes
1023that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1024release. So 4.44 and 4.50 are in effect two different branches that both start
1025from 4.43.
1027I have left the 4.50 change log unchanged; it contains all the changes since
10284.43. The change log for 4.44 is below; many of its items are identical to
1029those for 4.50. This seems to be the most sensible way to preserve the
1030historical information.
f7b63901 1033Exim version 4.50
1036 1. Minor wording change to the doc/README.SIEVE file.
139059f6 1038 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1039 computation of the current number of files was incorrect.
495ae4b0 1040
1041 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1042 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1043 place.
1045 4. Give more explanation in the error message when the command for a transport
1046 filter fails to execute.
1048 5. There are several places where Exim runs a non-Exim command in a
1049 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1050 was being done only for the command run by the queryprogram router. It is
1051 now done for all such subprocesses. The other cases are: ${run, transport
1052 filters, and the commands run by the lmtp and pipe transports.
1054 6. Added CONFIGURE_GROUP build-time option.
1056 7. Some older OS have a limit of 256 on the maximum number of file
1057 descriptors. Exim was using setrlimit() to set 1000 as a large value
1058 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1059 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1060
1061 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1062 was an oversight, and furthermore, ever since the addition of extra
1063 controls (e.g. 4.43/32), the checks on when to allow different forms of
1064 "control" were broken. There should now be diagnostics for all cases when a
1065 control that does not make sense is encountered.
1067 9. Added the /retain_sender option to "control=submission".
106910. $recipients is now available in the predata ACL (oversight).
107111. Tidy the search cache before the fork to do a delivery from a message
1072 received from the command line. Otherwise the child will trigger a lookup
1073 failure and thereby defer the delivery if it tries to use (for example) a
1074 cached ldap connection that the parent has called unbind on.
107612. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1077 of $address_data from the recipient verification was clobbered by the
1078 sender verification.
108013. The value of address_data from a sender verification is now available in
1081 $sender_address_data in subsequent conditions in the ACL statement.
108314. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
108515. Added a new option "connect=<time>" to callout options, to set a different
1086 connection timeout.
108816. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1089 was its contents. (It was OK if the option was not defined at all.)
109117. A "Completed" log line is now written for messages that are removed from
1092 the spool by the -Mrm option.
109418. New variables $sender_verify_failure and $recipient_verify_failure contain
1095 information about exactly what failed.
109719. Added -dd to debug only the daemon process.
109920. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1100 handles timeouts, both on the server side and network timeouts. Renamed the
1101 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
110321. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1104 It is now set to "smtps".
110622. $host_address is now set to the target address during the checking of
1107 ignore_target_hosts.
110923. When checking ignore_target_hosts for an ipliteral router, no host name was
1110 being passed; this would have caused $sender_host_name to have been used if
1111 matching the list had actually called for a host name (not very likely,
1112 since this list is usually IP addresses). A host name is now passed as
1113 "[x.x.x.x]".
111524. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1116 code that specifies a non-restarting handler (typically sigaction() in
1117 modern systems) in an attempt to fix a rare and obscure crash bug.
111925. Narrowed the window for a race in the daemon that could cause it to ignore
1120 SIGCHLD signals. This is not a major problem, because they are used only to
1121 wake it up if nothing else does.
112326. A malformed maildirsize file could cause Exim to calculate negative values
1124 for the mailbox size or file count. Odd effects could occur as a result.
1125 The maildirsize information is now recalculated if the size or filecount
1126 end up negative.
112827. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1129 support for a long time. Removed HAVE_SYS_VFS_H.
113128. Installed the latest version of exipick from John Jetmore.
113329. In an address list, if the pattern was not a regular expression, an empty
1134 subject address (from a bounce message) matched only if the pattern was an
1135 empty string. Non-empty patterns were not even tested. This was the wrong
1136 because it is perfectly reasonable to use an empty address as part of a
1137 database query. An empty address is now tested by patterns that are
1138 lookups. However, all the other forms of pattern expect the subject to
1139 contain a local part and a domain, and therefore, for them, an empty
1140 address still always fails if the pattern is not itself empty.
114230. Exim went into a mad DNS loop when attempting to do a callout where the
1143 host was specified on an smtp transport, and looking it up yielded more
1144 than one IP address.
114631. Re-factored the code for checking spool and log partition space into a
1147 function that finds that data and another that does the check. The former
1148 is then used to implement four new variables: $spool_space, $log_space,
1149 $spool_inodes, and $log_inodes.
115132. The RFC2047 encoding function was originally intended for short strings
1152 such as real names; it was not keeping to the 75-character limit for
1153 encoded words that the RFC imposes. It now respects the limit, and
1154 generates multiple encoded words if necessary. To be on the safe side, I
1155 have increased the buffer size for the ${rfc2047: expansion operator from
1156 1024 to 2048 bytes.
115833. It is now permitted to omit both strings after an "if" condition; if the
1159 condition is true, the result is "true". As before, when the second string
1160 is omitted, a false condition yields an empty string. This makes it less
1161 cumbersome to write custom ACL and router conditions.
116334. Failure to deliver a bounce message always caused it to be frozen, even if
1164 there was an errors_to setting on the router. The errors_to setting is now
1165 respected.
116735. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1168 canonical form (fully expanded) before being placed in
1169 $sender_host_address.
117136. The table in the code that translates DNS record types into text (T_A to
1172 "A" for instance) was missing entries for NS and CNAME. It is just possible
1173 that this could have caused confusion if both these types were looked up
1174 for the same domain, because the text type is used as part of Exim's
1175 per-process caching. But the chance of anyone hitting this buglet seems
1176 very small.
117837. The dnsdb lookup has been extended in a number of ways.
1180 (1) There is a new type, "zns", which walks up the domain tree until it
1181 finds some nameserver records. It should be used with care.
1183 (2) There is a new type, "mxh", which is like "mx" except that it returns
1184 just the host names, not the priorities.
1186 (3) It is now possible to give a list of domains (or IP addresses) to be
1187 looked up. The behaviour when one of the lookups defers can be
1188 controlled by a keyword.
7bb56e1f 1189
ea3bc19b 1190 (4) It is now possible to specify the separator character for use when
7bb56e1f 1191 multiple records are returned.
33397d19 1192
119338. The dnslists ACL condition has been extended: it is now possible to supply
1194 a list of IP addresses and/or domains to be looked up in a particular DNS
1195 domain.
119739. Added log_selector=+queue_time_overall.
119940. When running the queue in the test harness, wait just a tad after forking a
1200 delivery process, to get repeatability of debugging output.
120241. Include certificate and key file names in error message when GnuTLS fails
1203 to set them up, because the GnuTLS error message doesn't include the name
1204 of the failing file when there is a problem reading it.
120642. Allow both -bf and -bF in the same test run.
120843. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
121044. The "Exiscan patch" is now merged into the mainline Exim source.
121245. Sometimes the final signoff response after QUIT could fail to get
1213 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1214 < 0 before doing a fflush(). This bug looks as though it goes back to the
1215 introduction of TLS in release 3.20, but "sometimes" must have been rare
1216 because the tests only now provoked it.
121846. Reset the locale to "C" after calling embedded Perl, in case it was changed
1219 (this can affect the format of dates).
122147. exim_tidydb, when checking for the continued existence of a message for
1222 which it has found a message-specific retry record, was not finding
1223 messages that were in split spool directories. Consequently, it was
1224 deleting retry records that should have stayed in existence.
122648. Steve fixed some bugs in eximstats.
122849. The SPA authentication driver was not abandoning authentication and moving
1229 on to the next authenticator when an expansion was forced to fail,
1230 contradicting the general specification for all authenticators. Instead it
1231 was generating a temporary error. It now behaves as specified.
123350. The default ordering of permitted cipher suites for GnuTLS was pessimal
1234 (the order specifies the preference for clients). The order is now AES256,
1235 AES128, 3DES, ARCFOUR128.
123751. Small patch to Sieve code - explicitly set From: when generating an
1238 autoreply.
124052. Exim crashed if a remote delivery caused a very long error message to be
1241 recorded - for instance if somebody sent an entire SpamAssassin report back
1242 as a large number of 550 error lines. This bug was coincidentally fixed by
1243 increasing the size of one of Exim's internal buffers (big_buffer) that
1244 happened as part of the Exiscan merge. However, to be on the safe side, I
1245 have made the code more robust (and fixed the comments that describe what
1246 is going on).
124853. Now that there can be additional text after "Completed" in log lines (if
1249 the queue_time_overall log selector is set), a one-byte patch to exigrep
1250 was needed to allow it to recognize "Completed" as not the last thing in
1251 the line.
125354. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1254 patch that reportedly fixes this has been added. I am not expert enough to
1255 create a test for it. This is what the patch creator wrote:
1257 "I found a little strange behaviour of ldap code when working with
1258 Windows 2003 AD Domain, where users was placed in more than one
1259 Organization Units. When I tried to give exim partial DN, the exit code
1260 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1261 But simultaneously result of request was absolutely normal ldap result,
1262 so I produce this patch..."
1264 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1265 REFERENCE, so I have modified the code to exclude the patch when that macro
1266 is not defined.
126855. Some experimental protocols are using DNS PTR records for new purposes. The
1269 keys for these records are domain names, not reversed IP addresses. The
1270 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1271 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1272 CAN-2005-0021
7102e136 1273
127456. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
127657. Double the size of the debug message buffer (to 2048) so that more of very
1277 long debug lines gets shown.
127958. The exicyclog utility now does better if the number of log files to keep
1280 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
128259. Two changes related to the smtp_active_hostname option:
1284 (1) $smtp_active_hostname is now available as a variable.
1285 (2) The default for smtp_banner uses $smtp_active_hostname instead
1286 of $primary_hostname.
128860. The host_aton() function is supposed to be passed a string that is known
1289 to be a valid IP address. However, in the case of IPv6 addresses, it was
1290 not checking this. This is a hostage to fortune. Exim now panics and dies
1291 if the condition is not met. A case was found where this could be provoked
1292 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1293 components; fortuitously, this particular loophole had already been fixed
1294 by change 4.50/55 above.
1296 If there are any other similar loopholes, the new check in host_aton()
1297 itself should stop them being exploited. The report I received stated that
1298 data on the command line could provoke the exploit when Exim was running as
1299 exim, but did not say which command line option was involved. All I could
1300 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1301 running as the user.
ea3a6f44 1302 CAN-2005-0021
130461. There was a buffer overflow vulnerability in the SPA authentication code
1305 (which came originally from the Samba project). I have added a test to the
1306 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1307 CAN-2005-0022
b975ba52 1308
130962. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1310 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
131263. The daemon start-up calls getloadavg() while still root for those OS that
1313 need the first call to be done as root, but it missed one case: when
1314 deliver_queue_load_max is set with deliver_drop_privilege. This is
1315 necessary for the benefit of the queue runner, because there is no re-exec
1316 when deliver_drop_privilege is set.
131864. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1319 This has been fixed.
132165. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1322 was in use, was not putting the data itself into the right store pool;
1323 consequently, it could be overwritten for a subsequent message in the same
1324 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1325 the caching.)
132766. Added hosts_max_try_hardlimit to the smtp transport, default 50.
132967. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1330 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1331 the function were treating the return as a boolean value, which happened to
1332 work because 0=false and not-0=true, but is not correct code.
133468. The host_aton() function was not handling scoped IPv6 addresses (those
1335 with, for example, "%eth0" on the end) correctly.
133769. Fixed some compiler warnings in acl.c for the bitmaps specified with
1338 negated items (that is, ~something) in unsigned ints. Some compilers
1339 apparently mutter when there is no cast.
134170. If an address verification called from an ACL failed, and did not produce a
1342 user-specific message (i.e. there was only a "system" message), nothing was
1343 put in $acl_verify_message. In this situation, it now puts the system
1344 message there.
134671. Change 4.23/11 added synchronization checking at the start of an SMTP
1347 session; change 4.31/43 added the unwanted input to the log line - except
1348 that it did not do this in the start of session case. It now does.
135072. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1351 This is wrong and can cause the other end to generate a synchronization
1352 error if it is another Exim or anything else that does the synchronization
1353 check. A QUIT command is no longer sent after a timeout.
135573. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1356 during host lookups.
135874. The defer_ok option of callout verification was not working if it was used
1359 when verifying addresses in header lines, that is, for this case:
1361 verify = header_sender/callout=defer_ok
136375. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1364 those file descriptors could be used for SMTP connections. If anything
1365 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1366 could be sent to the SMTP client, causing chaos. The daemon now opens
1367 stdin, stdout, and stderr to /dev/null when it puts itself into the
1368 background.
137076. Arrange for output from Perl's "warn" command to be written to Exim's main
1371 log by default. The user can override this with suitable Perl magic.
137377. The use of log_message on a "discard" ACL verb, which is supposed to add to
1374 the log message when discard triggers, was not working for the DATA ACL or
1375 for the non-SMTP ACL.
137778. Error message wording change in sieve.c.
137979. If smtp_accept_max_per_host was set, the number of connections could be
1380 restricted to fewer than expected, because the daemon was trying to set up
1381 a new connection before checking whether the processes handling previous
1382 connections had finished. The check for completed processes is now done
1383 earlier. On busy systems, this bug wouldn't be noticed because something
1384 else would have woken the daemon, and it would have reaped the completed
1385 process earlier.
138780. If a message was submitted locally by a user whose login name contained one
1388 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1389 It caused a spool format error. I have fixed the spool reading code. A
1390 related problem was that the "from" clause in the Received: line became
1391 illegal because of the space(s). It is now covered by ${quote_local_part.
139381. Included the latest eximstats from Steve (adds average sizes to HTML Top
1394 tables).
139682. Updated OS/Makefile-AIX as per message from Mike Meredith.
139883. Patch from Sieve maintainer to fix unterminated string problem in
1399 "vacation" handling.
140184. Some minor changes to the Linux configuration files to help with other
1402 OS variants using glibc.
140485. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 1406
1408See the note above about the 4.44 and 4.50 releases.
1412Exim version 4.44
1415 1. Change 4.43/35 introduced a bug that caused file counts to be
1416 incorrectly computed when quota_filecount was set in an appendfile
1417 transport
1419 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1420 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1421 place.
1423 3. Give more explanation in the error message when the command for a transport
1424 filter fails to execute.
1426 4. There are several places where Exim runs a non-Exim command in a
1427 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1428 was being done only for the command run by the queryprogram router. It is
1429 now done for all such subprocesses. The other cases are: ${run, transport
1430 filters, and the commands run by the lmtp and pipe transports.
1432 5. Some older OS have a limit of 256 on the maximum number of file
1433 descriptors. Exim was using setrlimit() to set 1000 as a large value
1434 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1435 systems. I've change it so that if it can't get 1000, it tries for 256.
1437 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1438 was an oversight, and furthermore, ever since the addition of extra
1439 controls (e.g. 4.43/32), the checks on when to allow different forms of
1440 "control" were broken. There should now be diagnostics for all cases when a
1441 control that does not make sense is encountered.
1443 7. $recipients is now available in the predata ACL (oversight).
1445 8. Tidy the search cache before the fork to do a delivery from a message
1446 received from the command line. Otherwise the child will trigger a lookup
1447 failure and thereby defer the delivery if it tries to use (for example) a
1448 cached ldap connection that the parent has called unbind on.
1450 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1451 of $address_data from the recipient verification was clobbered by the
1452 sender verification.
145410. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1455 was its contents. (It was OK if the option was not defined at all.)
145711. A "Completed" log line is now written for messages that are removed from
1458 the spool by the -Mrm option.
146012. $host_address is now set to the target address during the checking of
1461 ignore_target_hosts.
146313. When checking ignore_target_hosts for an ipliteral router, no host name was
1464 being passed; this would have caused $sender_host_name to have been used if
1465 matching the list had actually called for a host name (not very likely,
1466 since this list is usually IP addresses). A host name is now passed as
1467 "[x.x.x.x]".
146914. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1470 code that specifies a non-restarting handler (typically sigaction() in
1471 modern systems) in an attempt to fix a rare and obscure crash bug.
147315. Narrowed the window for a race in the daemon that could cause it to ignore
1474 SIGCHLD signals. This is not a major problem, because they are used only to
1475 wake it up if nothing else does.
147716. A malformed maildirsize file could cause Exim to calculate negative values
1478 for the mailbox size or file count. Odd effects could occur as a result.
1479 The maildirsize information is now recalculated if the size or filecount
1480 end up negative.
148217. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1483 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 148518. Updated exipick to current release from John Jetmore.
148719. Allow an empty sender to be matched against a lookup in an address list.
1488 Previously the only cases considered were a regular expression, or an
1489 empty pattern.
149120. Exim went into a mad DNS lookup loop when doing a callout where the
1492 host was specified on the transport, if the DNS lookup yielded more than
1493 one IP address.
149521. The RFC2047 encoding function was originally intended for short strings
1496 such as real names; it was not keeping to the 75-character limit for
1497 encoded words that the RFC imposes. It now respects the limit, and
1498 generates multiple encoded words if necessary. To be on the safe side, I
1499 have increased the buffer size for the ${rfc2047: expansion operator from
1500 1024 to 2048 bytes.
bbe902f0 1501
150222. Failure to deliver a bounce message always caused it to be frozen, even if
1503 there was an errors_to setting on the router. The errors_to setting is now
1504 respected.
150623. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1507 canonical form (fully expanded) before being placed in
1508 $sender_host_address.
151024. Updated eximstats to version 1.33
151225. Include certificate and key file names in error message when GnuTLS fails
1513 to set them up, because the GnuTLS error message doesn't include the name
1514 of the failing file when there is a problem reading it.
151626. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1517 As per change 25.
bbe902f0 1518
151927. Reset the locale to "C" after calling embedded Perl, in case it was changed
1520 (this can affect the format of dates).
bbe902f0 1521
152228. exim_tidydb, when checking for the continued existence of a message for
1523 which it has found a message-specific retry record, was not finding
1524 messages that were in split spool directories. Consequently, it was
1525 deleting retry records that should have stayed in existence.
152729. eximstats updated to version 1.35
1528 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1529 1.35 - bugfix such that pie charts by volume are generated correctly
153130. The SPA authentication driver was not abandoning authentication and moving
1532 on to the next authenticator when an expansion was forced to fail,
1533 contradicting the general specification for all authenticators. Instead it
1534 was generating a temporary error. It now behaves as specified.
bbe902f0 1535
153631. The default ordering of permitted cipher suites for GnuTLS was pessimal
1537 (the order specifies the preference for clients). The order is now AES256,
1538 AES128, 3DES, ARCFOUR128.
bbe902f0 1539
154031. Small patch to Sieve code - explicitly set From: when generating an
1541 autoreply.
bbe902f0 1542
154332. Exim crashed if a remote delivery caused a very long error message to be
1544 recorded - for instance if somebody sent an entire SpamAssassin report back
1545 as a large number of 550 error lines. This bug was coincidentally fixed by
1546 increasing the size of one of Exim's internal buffers (big_buffer) that
1547 happened as part of the Exiscan merge. However, to be on the safe side, I
1548 have made the code more robust (and fixed the comments that describe what
1549 is going on).
bbe902f0 1550
155133. Some experimental protocols are using DNS PTR records for new purposes. The
1552 keys for these records are domain names, not reversed IP addresses. The
1553 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1554 leaves it alone. Component reversal etc. now happens only for IP addresses.
1555 CAN-2005-0021
155734. The host_aton() function is supposed to be passed a string that is known
1558 to be a valid IP address. However, in the case of IPv6 addresses, it was
1559 not checking this. This is a hostage to fortune. Exim now panics and dies
1560 if the condition is not met. A case was found where this could be provoked
1561 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1562 components; fortuitously, this particular loophole had already been fixed
1563 by change 4.50/55 or 4.44/33 above.
1565 If there are any other similar loopholes, the new check in host_aton()
1566 itself should stop them being exploited. The report I received stated that
1567 data on the command line could provoke the exploit when Exim was running as
1568 exim, but did not say which command line option was involved. All I could
1569 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1570 running as the user.
1571 CAN-2005-0021
157335. There was a buffer overflow vulnerability in the SPA authentication code
1574 (which came originally from the Samba project). I have added a test to the
1575 spa_base64_to_bits() function which I hope fixes it.
1576 CAN-2005-0022
157836. The daemon start-up calls getloadavg() while still root for those OS that
1579 need the first call to be done as root, but it missed one case: when
1580 deliver_queue_load_max is set with deliver_drop_privilege. This is
1581 necessary for the benefit of the queue runner, because there is no re-exec
1582 when deliver_drop_privilege is set.
bbe902f0 1583
158437. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1585 was in use, was not putting the data itself into the right store pool;
1586 consequently, it could be overwritten for a subsequent message in the same
1587 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1588 the caching.)
bbe902f0 1589
159038. Sometimes the final signoff response after QUIT could fail to get
1591 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1592 < 0 before doing a fflush(). This bug looks as though it goes back to the
1593 introduction of TLS in release 3.20, but "sometimes" must have been rare
1594 because the tests only now provoked it.
1597Exim version 4.43
1600 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1601 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1602 Now it returns an integer. A number of calls were still expecting a T/F
1603 return. Fortuitously, in all cases, the tests worked in OK situations,
1604 which is the norm. However, things would have gone wrong on any write
1605 failures on the smtp file descriptor. This function is used when sending
1606 messages over SMTP and also when doing verify callouts.
1608 2. When Exim is called to do synchronous delivery of a locally submitted
1609 message (the -odf or -odi options), it no longer closes stderr before doing
1610 the delivery.
1612 3. Implemented the mua_wrapper option.
1614 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1616 5. Implemented the functions header_remove(), header_testname(),
1617 header_add_at_position(), and receive_remove_recipient(), and exported them
1618 to local_scan().
1620 6. If an ACL "warn" statement specified the addition of headers, Exim already
1621 inserted X-ACL-Warn: at the start if there was no header name. However, it
1622 was not making this test for the second and subsequent header lines if
1623 there were newlines in the string. This meant that an invalid header could
1624 be inserted if Exim was badly configured.
1626 7. Allow an ACL "warn" statement to add header lines at the start or after all
1627 the Received: headers, as well as at the end.
1629 8. Added the rcpt_4xx retry error code.
1631 9. Added postmaster_mailfrom=xxx to callout verification option.
163310. Added mailfrom=xxxx to the callout verification option, for verify=
1634 header_sender only.
163611. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1637 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
163912. Inserted some casts to stop certain compilers warning when using pointer
1640 differences as field lengths or precisions in printf-type calls (mostly
1641 affecting debugging statements).
164313. Added optional readline() support for -be (dynamically loaded).
164514. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1646 same clock tick as a message's arrival, so that its received time was the
1647 same as the "first fail" time on the retry record, and that message
1648 remained on the queue past the ultimate address timeout, every queue runner
1649 would try a delivery (because it was past the ultimate address timeout) but
1650 after another failure, the ultimate address timeout, which should have then
1651 bounced the address, did not kick in. This was a "< instead of <=" error;
1652 in most cases the first failure would have been in the next clock tick
1653 after the received time, and all would be well.
165515. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1656 being recognized when the domain list was tested by the match_domain
1657 condition in an expansion string.
165916. Added the ${str2b64: operator.
166117. Exim was always calling setrlimit() to set a large limit for the number of
1662 processes, without checking whether the existing limit was already
1663 adequate. (It did check for the limit on file descriptors.) Furthermore,
1664 errors from getrlimit() and setrlimit() were being ignored. Now they are
1665 logged to the main and panic logs, but Exim does carry on, to try to do its
1666 job under whatever limits there are.
166818. Imported PCRE 5.0.
167019. Trivial typo in log message " temporarily refused connection" (the leading
1671 space).
167320. If the log selector return_path_on_delivery was set and an address was
1674 redirected to /dev/null, the delivery process crashed because it assumed
1675 that a return path would always be set for a "successful" delivery. In this
1676 case, the whole delivery is bypassed as an optimization, and therefore no
1677 return path is set.
167921. Internal re-arrangement: the function for sending a challenge and reading
1680 a response while authentication was assuming a zero-terminated challenge
1681 string. It's now changed to take a pointer and a length, to allow for
1682 binary data in such strings.
168422. Added the cyrus_sasl authenticator (code supplied by MBM).
168623. Exim was not respecting finduser_retries when seeking the login of the
1687 uid under which it was called; it was always trying 10 times. (The default
1688 setting of finduser_retries is zero.) Also, it was sleeping after the final
1689 failure, which is pointless.
169124. Implemented tls_on_connect_ports.
169325. Implemented acl_smtp_predata.
169526. If the domain in control=submission is set empty, Exim assumes that the
1696 authenticated id is a complete email address when it generates From: or
1697 Sender: header lines.
169927. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1700 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1701 chown and chgrp in /bin and hostname in /usr/bin.
170328. Exim was keeping the "process log" file open after each use, just as it
1704 does for the main log. This opens the possibility of it remaining open for
1705 long periods when the USR1 signal hits a daemon. Occasional processlog
1706 errors were reported, that could have been caused by this. Anyway, it seems
1707 much more sensible not to leave this file open at all, so that is what now
1708 happens.
171029. The long-running daemon process does not normally write to the log once it
1711 has entered its main loop, and it closes the log before doing so. This is
1712 so that log files can straightforwardly be renamed and moved. However,
1713 there are a couple of unusual error situations where the daemon does write
1714 log entries, and I had neglected to close the log afterwards.
171630. The text of an SMTP error response that was received during a remote
1717 delivery was being truncated at 512 bytes. This is too short for some of
1718 the long messages that one sometimes sees. I've increased the limit to
1719 1024.
172131. It is now possible to make retry rules that apply only when a message has a
1722 specific sender, in particular, an empty sender.
172432. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1725 it possible to be selective about when SMTP synchronization is enforced.
172733. Added "control = caseful_local_part" and "control = "caselower_local_part".
172932. Implemented hosts_connection_nolog.
173133. Added an ACL for QUIT.
173334. Setting "delay_warning=" to disable warnings was not working; it gave a
1734 syntax error.
173635. Added mailbox_size and mailbox_filecount to appendfile.
173836. Added control = no_multiline_responses to ACLs.
174037. There was a bug in the logic of the code that waits for the clock to tick
1741 in the case where the clock went backwards by a substantial amount such
1742 that the microsecond fraction of "now" was more than the microsecond
1743 fraction of "then" (but the whole seconds number was less).
174538. Added support for the libradius Radius client library this is found on
1746 FreeBSD (previously only the radiusclient library was supported).
1749Exim version 4.42
1752 1. When certain lookups returned multiple values in the form name=value, the
1753 quoting of the values was not always being done properly. Specifically:
1754 (a) If the value started with a double quote, but contained no whitespace,
1755 it was not quoted.
1756 (b) If the value contained whitespace other than a space character (i.e.
1757 tabs or newlines or carriage returns) it was not quoted.
1758 This fix has been applied to the mysql and pgsql lookups by writing a
1759 separate quoting function and calling it from the lookup code. The fix
1760 should probably also be applied to nisplus, ibase and oracle lookups, but
1761 since I cannot test any of those, I have not disturbed their existing code.
1763 2. A hit in the callout cache for a specific address caused a log line with no
1764 reason for rejecting RCPT. Now it says "Previous (cached) callout
1765 verification failure".
1767 3. There was an off-by-one bug in the queryprogram router. An over-long
1768 return line was truncated at 256 instead of 255 characters, thereby
1769 overflowing its buffer with the terminating zero. As well as fixing this, I
1770 have increased the buffer size to 1024 (and made a note to document this).
1772 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1773 when Exim is waiting for an SMTP response from a remote server, Exim
1774 restarts its select() call on the socket, thereby resetting its timeout.
1775 This is not a problem when such interrupts are rare. Somebody set up a cron
1776 job to run exiwhat every 2 minutes, which is less than the normal select()
1777 timeout (5 or 10 minutes). This meant that the select() timeout never
1778 kicked in because it was always reset. I have fixed this by comparing the
1779 time when an interrupt arrives with the time at the start of the first call
1780 to select(). If more time than the timeout has elapsed, the interrupt is
1781 treated as a timeout.
1783 5. Some internal re-factoring in preparation for the addition of Sieve
1784 extensions (by MH). In particular, the "personal" test is moved to a
1785 separate function, and given an option for scanning Cc: and Bcc: (which is
1786 not set for Exim filters).
1788 6. When Exim created an email address using the login of the caller as the
1789 local part (e.g. when creating a From: or Sender: header line), it was not
1790 quoting the local part when it contained special characters such as @.
1792 7. Installed new OpenBSD configuration files.
1794 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1795 try to make them clearer.
1797 9. Callout options, other than the timeout value, were being ignored when
1798 verifying sender addresses in header lines. For example, when using
1800 verify = header_sender/callout=no_cache
1802 the cache was (incorrectly) being used.
180410. Added a missing instance of ${EXE} to the exim_install script; this affects
1805 only the Cygwin environment.
180711. When return_path_on_delivery was set as a log selector, if different remote
1808 addresses in the same message used different return paths and parallel
1809 remote delivery occurred, the wrong values would sometimes be logged.
1810 (Whenever a remote delivery process finished, the return path value from
1811 the most recently started remote delivery process was logged.)
181312. RFC 3848 specifies standard names for the "with" phrase in Received: header
1814 lines when AUTH and/or TLS are in use. This is the "received protocol"
1815 field. Exim used to use "asmtp" for authenticated SMTP, without any
1816 indication (in the protocol name) for TLS use. Now it follows the RFC and
1817 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1818 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1819 names appear in log lines as well as in Received: header lines.
182113. Installed MH's patches for Sieve to add the "copy" and "vacation"
1822 extensions, and comparison tests, and to fix some bugs.
182414. Changes to the "personal" filter test:
1826 (1) The test was buggy in that it was just doing the equivalent of
1827 "contains" tests on header lines. For example, if a user's address was
1828 anne@some.where, the "personal" test would incorrectly be true for
1830 To: susanne@some.where
1832 This test is now done by extracting each address from the header in turn,
1833 and checking the entire address. Other tests that are part of "personal"
1834 are now done using regular expressions (for example, to check local parts
1835 of addresses in From: header lines).
1837 (2) The list of non-personal local parts in From: addresses has been
1838 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1839 taken from the Sieve specification recommendations.
1841 (3) If the message contains any header line starting with "List-" it is
1842 treated as non-personal.
1844 (4) The test for "circular" in the Subject: header line has been removed
1845 because it now seems ill-conceived.
184715. Minor typos in src/EDITME comments corrected.
184916. Installed latest exipick from John Jetmore.
185117. If headers_add on a router specified a text string that was too long for
1852 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1853 of string_sprintf() is now avoided.
185518. $message_body_size was not set (it was always zero) when running the DATA
1856 ACL and the local_scan() function.
185819. For the "mail" command in an Exim filter, no default was being set for
1859 the once_repeat time, causing a random time value to be used if "once" was
1860 specified. (If the value happened to be <= 0, no repeat happened.) The
1861 default is now 0s, meaning "never repeat". The "vacation" command was OK
1862 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1863 (I found it when inspecting the code).
186520. There is now an overall timeout for performing a callout verification. It
1866 defaults to 4 times the callout timeout, which applies to individual SMTP
1867 commands during the callout. The overall timeout applies when there is more
1868 than one host that can be tried. The timeout is checked before trying the
1869 next host. This prevents very long delays if there are a large number of
1870 hosts and all are timing out (e.g. when the network connections are timing
1871 out). The value of the overall timeout can be changed by specifying an
1872 additional sub-option for "callout", called "maxwait". For example:
1874 verify = sender/callout=5s,maxwait=20s
187621. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1877 to the end before writing, but this should make it even safer).
187922. Exim was forgetting that it had advertised PIPELINING for the second and
1880 subsequent messages on an SMTP connection. It was also not resetting its
1881 memory on STARTTLS and an internal HELO.
188323. When Exim logs an SMTP synchronization error within a session, it now
1884 records whether PIPELINING has been advertised or not.
188624. Added 3 instances of "(long int)" casts to time_t variables that were being
1887 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1888 rather than long int.
189025. Installed the latest Cygwin configuration files from the Cygwin maintainer.
189226. Added the never_mail option to autoreply.
1895Exim version 4.41
1898 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1899 crash if the getsockname() call failed; this can happen if a connection is
1900 closed very soon after it is established. The problem was simply in the
1901 order in which certain operations were done, causing Exim to try to write
1902 to the SMTP stream before it had set up the file descriptor. The bug has
1903 been fixed by making things happen in the correct order.
1906Exim version 4.40
1909 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1910 before the connection was closed, thus losing the rejection response.
1912 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1913 some early Solaris releases, but causes trouble in current releases where
1914 socklen_t is defined.
1916 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1917 always exist.
1919 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1920 configured.
1922 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1923 that releasing the top of it at the end releases what was used for sub-
1924 expansions (unless the block got too big). However, discard this block if
1925 the first thing is a variable or header, so that we can use its block when
1926 it is dynamic (useful for very large $message_headers, for example).
1928 6. Lookups now cache *every* query, not just the most recent. A new, separate
1929 store pool is used for this. It can be recovered when all lookup caches are
1930 flushed. Lookups now release memory at the end of their result strings.
1931 This has involved some general refactoring of the lookup sources.
1933 7. Some code has been added to the store_xxx() functions to reduce the amount
1934 of flapping under certain conditions.
1936 8. log_incoming_interface used to affect only the <= reception log lines. Now
1937 it causes the local interface and port to be added to several more SMTP log
1938 lines, for example "SMTP connection from", and rejection lines.
1940 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
194210. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
194411. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1945 could be overwritten at the end of the current message (or the start of a
1946 new message if it was set in a HELO ACL). The value is now preserved for
1947 the duration of the SMTP connection.
194912. If a transport had a headers_rewrite setting, and a matching header line
1950 contained an unqualified address, that address was qualified, even if it
1951 did not match any rewriting rules. The underlying bug was that the values
1952 of the flags that permit the existence of unqualified sender and recipient
1953 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1954 non-local messages, and by -bnq for local messages) were not being
1955 preserved with the message after it was received.
195713. When Exim was logging an SMTP synchronization error, it could sometimes log
1958 "next input=" as part of the text comprising the host identity instead of
1959 the correct text. The code was using the same buffer for two different
1960 strings. However, depending on which order the printing function evaluated
1961 its arguments, the bug did not always show up. Under Linux, for example, my
1962 test suite worked just fine.
196414. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1965 doesn't work with some older versions of Perl. It has been changed to "my",
1966 which in any case is probably the better facility to use.
196815. A really picky compiler found some instances of statements for creating
1969 error messages that either had too many or two few arguments for the format
1970 string.
197216. The size of the buffer for calls to the DNS resolver has been increased
1973 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1974 for addresses that have a lot of PTR records. This alleviates a problem; it
1975 does not fully solve it.
197717. A dnsdb lookup for PTR records that receives more data than will fit in the
1978 buffer now truncates the list and logs the incident, which is the same
1979 action as happens when Exim is looking up a host name and its aliases.
1980 Previously in this situation something unpredictable would happen;
1981 sometimes it was "internal error: store_reset failed".
198318. If a server dropped the connection unexpectedly when an Exim client was
1984 using GnuTLS and trying to read a response, the client delivery process
1985 crashed while trying to generate an error log message.
198719. If a "warn" verb in an ACL added multiple headers to a message in a single
1988 string, for example:
1990 warn message = H1: something\nH2: something
1992 the text was added as a single header line from Exim's point of view
1993 though it ended up OK in the delivered message. However, searching for the
1994 second and subsequent header lines using $h_h2: did not work. This has been
1995 fixed. Similarly, if a system filter added multiple headers in this way,
1996 the routers could not see them.
199820. Expanded the error message when iplsearch is called with an invalid key to
1999 suggest using net-iplsearch in a host list.
200121. When running tests using -bh, any delays imposed by "delay" modifiers in
2002 ACLs are no longer actually imposed (and a message to that effect is
2003 output).
200522. If a "gecos" field in a passwd entry contained escaped characters, in
2006 particular, if it contained a \" sequence, Exim got it wrong when building
2007 a From: or a Sender: header from that name. A second bug also caused
2008 incorrect handling when an unquoted " was present following a character
2009 that needed quoting.
201123. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2012 was not being matched caselessly.
201424. Arranged for all hyphens in the exim.8 source to be escaped with
2015 backslashes.
201725. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2018 properly. Recipient callout cache records were still being keyed to include
2019 the sender, even when use_sender was set false. This led to far more
2020 callouts that were necessary. The sender is no longer included in the key
2021 when use_sender is false.
202326. Added "control = submission" modifier to ACLs.
202527. Added the ${base62d: operator to decode base 62 numbers.
202728. dnsdb lookups can now access SRV records.
202929. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2030 the configuration file.
203230. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2033 (-v) mode. This makes the output for a verbose queue run more intelligible.
203531. Added a use_postmaster feature to recipient callouts.
203732. Added the $body_zerocount variable, containing the number of binary zero
2038 bytes in the message body.
204033. The time of last modification of the "new" subdirectory is now used as the
2041 "mailbox time last read" when there is a quota error for a maildir
2042 delivery.
204434. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
204635. Added +ignore_unknown as a special item in host lists.
204836. Code for decoding IPv6 addresses in host lists is now included, even if
2049 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2050 address was recognized as an IP address, but was then not correctly decoded
2051 into binary, causing unexpected and incorrect effects when compared with
2052 another IP address.
2055Exim version 4.34
2058 1. Very minor rewording of debugging text in manualroute to say "list of
2059 hosts" instead of "hostlist".
2061 2. If verify=header_syntax was set, and a header line with an unqualified
2062 address (no domain) and a large number of spaces between the end of the
2063 name and the colon was received, the reception process suffered a buffer
2064 overflow, and (when I tested it) crashed. This was caused by some obsolete
2065 code that should have been removed. The fix is to remove it!
2067 3. When running in the test harness, delay a bit after writing a bounce
2068 message to get a bit more predictability in the log output.
2070 4. Added a call to search_tidyup() just before forking a reception process. In
2071 theory, someone could use a lookup in the expansion of smtp_accept_max_
2072 per_host which, without the tidyup, could leave open a database connection.
2074 5. Added the variables $recipient_data and $sender_data which get set from a
2075 lookup success in an ACL "recipients" or "senders" condition, or a router
2076 "senders" option, similar to $domain_data and $local_part_data.
2078 6. Moved the writing of debug_print from before to after the "senders" test
2079 for routers.
2081 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2082 problems for message scanning, either using a data ACL, or using
2083 local_scan() because the Received: header was not generated till after they
2084 were called (in order to set the time as the time of reception completion).
2085 I have revised the way this works. The header is now generated after the
2086 body is received, but before the ACL or local_scan() are called. After they
2087 are run, the timestamp in the header is updated.
2090Exim version 4.33
2093 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2094 before starting a queue runner without re-exec. This happened only when
2095 deliver_drop_privilege was set or when the Exim user was set to root. The
2096 effect of the bug was that timeouts during subsequent deliveries caused
2097 crashes instead of being properly handled. The handler is now left at its
2098 default (and expected) setting.
2100 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2101 message, again when deliver_drop_privilege is set or Exim is run as root.
2102 The bug described in (1) was not present in this case, but the tidying up
2103 of the other signals was missing. I have made the two cases consistent.
2105 3. The ignore_target_hosts setting on a manualroute router was being ignored
2106 for hosts that were looked up using the /MX notation.
2108 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2109 in domain lists.
2111 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2112 operated on the sender address. After changing the $sender_address to <>
2113 for the sender address verify, Exim was re-instated it as the original
2114 (before rewriting) address, but remembering that it had rewritten it, so it
2115 wasn't rewriting it again. This bug also had the effect of breaking the
2116 sender address verification caching when the sender address was rewritten.
2118 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2119 This has been changed so that if the ip literal address matches
2120 ignore_target_hosts, the router declines.
2122 7. Added expansion conditions match_domain, match_address, and match_local_
2123 part (NOT match_host).
2125 8. The placeholder for the Received: header didn't have a length field set.
2127 9. Added code to Exim itself and to exim_lock to test for a specific race
2128 condition that could lead to file corruption when using MBX delivery. The
2129 issue is with the lockfile that is created in /tmp. If this file is removed
2130 after a process has opened it but before that process has acquired a lock,
2131 there is the potential for a second process to recreate the file and also
2132 acquire a lock. This could lead to two Exim processes writing to the file
2133 at the same time. The added code performs the same test as UW imapd; it
2134 checks after acquiring the lock that its file descriptor still refers to
2135 the same named file.
213710. The buffer for building added header lines was of fixed size, 8192 bytes.
2138 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2139 when Exim is built.
214111. Added the smtp_active_hostname option. If used, this will typically be made
2142 to depend on the incoming interface address. Because $interface_address is
2143 not set up until the daemon has forked a reception process, error responses
2144 that can happen earlier (such as "too many connections") no longer contain
2145 a host name.
214712. If an expansion in a condition on a "warn" statement fails because a lookup
2148 defers, the "warn" statement is abandoned, and the next ACL statement is
2149 processed. Previously this caused the whole ACL to be aborted.
215113. Added the iplsearch lookup type.
215314. Added ident_timeout as a log selector.
215515. Added tls_certificate_verified as a log selector.
215716. Added a global option tls_require_ciphers (compare the smtp transport
2158 option of the same name). This controls incoming TLS connections.
216017. I finally figured out how to make tls_require_ciphers do a similar thing
2161 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2162 before starting the TLS session.
216418. Tabs are now shown as \t in -bP output.
216619. If the log selector return_path_on_delivery was set, Exim crashed when
2167 bouncing a message because it had too many Received: header lines.
216920. If two routers both had headers_remove settings, and the first one included
2170 a superfluous trailing colon, the final name in the first list and the
2171 first name in the second list were incorrectly joined into one item (with a
2172 colon in the middle).
2175Exim version 4.32
2178 1. Added -C and -D options to the exinext utility, mainly to make it easier
2179 to include in the automated testing, but these could be helpful when
2180 multiple configurations are in use.
2182 2. The exinext utility was not formatting the output nicely when there was
2183 an alternate port involved in the retry record key, nor when there was a
2184 message id as well (for retries that were specific to a specific message
2185 and a specific host). It was also confused by IPv6 addresses, because of
2186 the additional colons they contain. I have fixed the IPv4 problem, and
2187 patched it up to do a reasonable job for IPv6.
2189 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2190 delivery, the log line now contains "pipelined" if PIPELINING was used.
2192 4. An SMTP transport process used to panic and die if the bind() call to set
2193 an explicit outgoing interface failed. This has been changed; it is now
2194 treated in the same way as a connect() failure.
2196 5. A reference to $sender_host_name in the part of a conditional expansion
2197 that was being skipped was still causing a DNS lookup. This no longer
2198 occurs.
2200 6. The def: expansion condition was not recognizing references to header lines
2201 that used bh_ and bheader_.
2203 7. Added the _cache feature to named lists.
2205 8. The code for checking quota_filecount in the appendfile transport was
2206 allowing one more file than it should have been.
2208 9. For compatibility with Sendmail, the command line option
2210 -prval:sval
2212 is equivalent to
2214 -oMr rval -oMs sval
2216 and sets the incoming protocol and host name (for trusted callers). The
2217 host name and its colon can be omitted when only the protocol is to be set.
2218 Note the Exim already has two private options, -pd and -ps, that refer to
2219 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2220 "s", but I don't think that's a major issue.
222210. A number of refactoring changes to the code, none of which should affect
2223 Exim's behaviour:
2225 (a) The number of logging options was getting close to filling up the
2226 32-bit word that was used as a bit map. I have split them into two classes:
2227 those that are passed in the argument to log_write(), and those that are
2228 only ever tested independently outside of that function. These are now in
2229 separate 32-bit words, so there is plenty of room for expansion again.
2230 There is no change in the user interface or the logging behaviour.
2232 (b) When building, for example, log lines, the code previously used a
2233 macro that called string_cat() twice, in order to add two strings. This is
2234 not really sufficiently general. Furthermore, there was one instance where
2235 it was actually wrong because one of the argument was used twice, and in
2236 one call a function was used. (As it happened, calling the function twice
2237 did not affect the overall behaviour.) The macro has been replaced by a
2238 function that can join an arbitrary number of extra strings onto a growing
2239 string.
2241 (c) The code for expansion conditions now uses a table and a binary chop
2242 instead of a serial search (which was left over from when there were very
2243 few conditions). Also, it now recognizes conditions like "pam" even when
2244 the relevant support is not compiled in: a suitably worded error message is
2245 given if an attempt is made to use such a condition.
224711. Added ${time_interval:xxxxx}.
224912. A bug was causing one of the ddress fields not to be passed back correctly
2250 from remote delivery subprocesses. The field in question was not being
2251 subsequently used, so this caused to problems in practice.
225313. Added new log selectors queue_time and deliver_time.
225514. Might have fixed a bug in maildirsizefile handling that threw up
2256 "unexpected character" debug warnings, and recalculated the data
2257 unnecessarily. In any case, I expanded the warning message to give more
2258 information.
226015. Added the message "Restricted characters in address" to the statements in
2261 the default ACL that block characters like @ and % in local parts.
226316. Change 71 for release 4.31 proved to be much less benign that I imagined.
2264 Three changes have been made:
2266 (a) There was a serious bug; a negative response to MAIL caused the whole
2267 recipient domain to be cached as invalid, thereby blocking all messages
2268 to all local parts at the same domain, from all senders. This bug has
2269 been fixed. The domain is no longer cached after a negative response to
2270 MAIL if the sender used is not empty.
2272 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2273 been restored.
2275 (c) A new callout option, "use_sender" has been added for people who want
2276 the modified behaviour.
2279Exim version 4.31
2282 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2283 Larry Rosenman.
2285 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2286 indeed breaks things for older releases.
2288 3. Added additional logging to the case where there is a problem reading data
2289 from a filter that is running in a subprocess using a pipe, in order to
2290 try to track down a specific problem.
2292 4. Testing facility fudge: when running in the test harness and attempting
2293 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2294 getting "No route to host". Convert this to a timeout.
2296 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2297 warning.
2299 6. Some OS don't have socklen_t but use size_t instead. This affects the
2300 fifth argument of getsockopt() amongst other things. This is now
2301 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2302 can be set for individual OS. I have set it for SunOS5, OSF1, and
2303 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2304 some earlier ones do not.
2306 7. Change 4.30/15 was not doing the test caselessly.
2308 8. The standard form for an IPv6 address literal was being rejected by address
2309 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2310 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2311 this, as well as the form without the "IPv6" on the front (but only when
2312 address literals are enabled, of course).
2314 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
231610. Exim crashed if a message with an empty sender address specified by -f
2317 encountered a router with an errors_to setting. This could be provoked only
2318 by a command such as
2320 exim -f "" ...
2322 where an empty string was supplied; "<>" did not hit this bug.
232411. Installed PCRE release 4.5.
232612. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2327 remained set. It is now erased.
232913. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2330 times from message ids (which are base 36 rather than the normal 62).
233214. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2333 were being counted as actual protocol errors, and logged if the log
2334 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2335 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2336 and DATA following a set of rejected RCPTs do not count as protocol errors.
2337 In other words, Exim assumes they were pipelined, though this may not
2338 actually be the case. Of course, in all cases the client gets an
2339 appropriate error code.
234115. If a lookup fails in an ACL condition, a message about the failure may
2342 be available; it is used if testing the ACL cannot continue, because most
2343 such messages specify what the cause of the deferral is. However, some
2344 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2345 that caused an old message to be retained and used if a later statement
2346 caused a defer, replacing the real cause of the deferral.
234816. If an IP address had so many PTR records that the DNS lookup buffer
2349 was not large enough to hold them, Exim could crash while trying to process
2350 the truncated data. It now detects and logs this case.
235217. Further to 4.21/58, another change has been made: if (and only if) the
2353 first line of a message (the first header line) ends with CRLF, a bare LF
2354 in a subsequent header line has a space inserted after it, so as not to
2355 terminate the header.
235718. Refactoring: tidied an ugly bit of code in appendfile that copied data
2358 unnecessarily, used atoi() instead of strtol(), and didn't check the
2359 termination when getting file sizes from file names by regex.
236119. Completely re-implemented the support for maildirsize files, in the light
2362 of a number of problems with the previous contributed implementation
2363 (4.30/29). In particular:
2365 . If the quota is zero, the maildirsize file is maintained, but no quota is
2366 imposed.
2368 . If the maildir directory does not exist, it is created before any attempt
2369 to write a maildirsize file.
2371 . The quota value in the file is just a cache; if the quota is changed in
2372 the transport, the new value overrides.
2374 . A regular expression is available for excluding directories from the
2375 count.
237720. The autoreply transport checks the characters in options that define the
2378 message's headers; it allows continued headers, but it was checking with
2379 isspace() after an embedded newline instead of explicitly looking for a
2380 space or a tab.
238221. If all the "regular" hosts to which an address was routed had passed their
2383 expiry times, and had not reached their retry times, the address was
2384 bounced, even if fallback hosts were defined. Now Exim should go on to try
2385 the fallback hosts.
238722. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2388 equivalent code in the SMTP transport. Some hosts send humungous responses
2389 to HELO/EHLO, more than 1024 it seems.
239123. Refactoring: code in filter.c used (void *) for "any old type" but this
2392 gives compiler warnings in some environments. I've now done it "properly",
2393 using a union.
239524. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2396 (because of problems with the built-in one) was declared to return uschar *
2397 instead of char *, causing compiler failure.
239925. Fixed a file descriptor leak when processing alias/forward files.
240126. Fixed a minor format string issue in dbfn.c.
240327. Typo in exim.c: ("dmbnz" for "dbmnz").
240528. If a filter file refered to $h_xxx or $message_headers, and the headers
2406 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2407 become corrupted.
240929. When a sender address is verified, it is cached, to save repeating the test
2410 when there is more than one recipient in a message. However, when the
2411 verification involves a callout, it is possible for different callout
2412 options to be set for different recipients. It is too complicated to keep
2413 track of this in the cache, so now Exim always runs a verification when a
2414 callout is required, relying on the callout cache for the optimization.
2415 The overhead is duplication of the address routing, but this should not be
2416 too great.
241830. Fixed a bug in callout caching. If a RCPT command caused the sender address
2419 to be verified with callout=postmaster, and the main callout worked but the
2420 postmaster check failed, the verification correctly failed. However, if a
2421 subsequent RCPT command asked for sender verification *without* the
2422 postmaster check, incorrect caching caused this verification also to fail,
2423 incorrectly.
242531. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2426 it was not caching the DNS options (qualify_single, search_parents) that
2427 were used when the lookup failed. A subsequent lookup with different
2428 options therefore always gave the same answer, though there were cases
2429 where it should not have. (Example: a "domains = !$mx_any" option on a
2430 dnslookup router: the "domains" option is always processed without any
2431 widening, but the router might have qualify_single set.) Now Exim uses the
2432 cached value only when the same options are set.
243432. Added John Jetmore's "exipick" utility to the distribution.
243633. GnuTLS: When an attempt to start a TLS session fails for any reason other
2437 than a timeout (e.g. a certificate is required, and is not provided), an
2438 Exim server now closes the connection immediately. Previously it waited for
2439 the client to close - but if the client is SSL, it seems that they each
2440 wait for each other, leading to a delay before one of them times out.
244234: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2443 maintained 0.8.x compatibility because I don't think many are using it, and
2444 it is clearly obsolete.
244635. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2447 transport.
244936. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2450 client certificate was expired. A simple patch fixes this, though I don't
2451 understand the full logic of why the verify callback is called multiple
2452 times.
245437. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2455 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2456 which causes problems with some clients (such as the Certicom SSL Plus
2457 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2458 disables the coutermeasure allowing Eudora to connect."
246038. Exim was not checking that a write() to a log file succeeded. This could
2461 lead to Bad Things if a log got too big, in particular if it hit a file
2462 size limit. Exim now panics and dies if it cannot write to a log file, just
2463 as it does if it cannot open a log file.
246539. Modified OS/Makefile-Linux so that it now contains
2469 The two -D definitions ensure that Exim is compiled with large file
2470 support, which makes it possible to handle log files that are bigger than
2471 2^31.
247340. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2474 instance) a domain was checked against a named list that involved a lookup,
2475 causing $domain_data to be set, then another domain was checked against the
2476 same list, then the first domain was re-checked, the value of $domain_data
2477 after the final check could be wrong. In particular, if the second check
2478 failed, it could be set empty. This bug probably also applied to
2479 $localpart_data.
248141. The strip_trailing_dot option was not being applied to the address given
2482 with the -f command-line option.
248442. The code for reading a message's header from the spool was incrementing
2485 $received_count, but never initializing it. This meant that the value was
2486 incorrect (doubled) while delivering a message in the same process in which
2487 it was received. In the most common configuration of Exim, this never
2488 happens - a fresh exec is done - but it can happen when
2489 deliver_drop_privilege is set.
249143. When Exim logs an SMTP synchronization error - client data sent too soon -
2492 it now includes up to 150 characters of the unexpected data in the log
2493 line.
249544. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2496 and building data strings. The size of both of these buffers was 10 000
2497 bytes - far larger than anybody would *ever* want, thought I. Needless to
2498 say, somebody hit the limit. I have increased the maximum line length to
2499 20 000 and the maximum data length of concatenated lines to 100 000. I have
2500 also fixed two bugs, because there was no checking on these buffers. Tsk,
2501 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2502 buffer is too small.
250445. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2505 lsearch lookups. Now it does.
250746. When parsing a route_list item in a manualroute router, a fixed-length
2508 buffer was used for the list of hosts. I made this 1024 bytes long,
2509 thinking that nobody would ever have a list of hosts that long. Wrong.
2510 Somebody had a whole pile of complicated expansion conditions, and the
2511 string was silently truncated, leading to an expansion error. It turns out
2512 that it is easier to change to an unlimited length (owing to other changes
2513 that have happened since this code was originally written) than to build
2514 structure for giving a limitation error. The length of the item that
2515 expands into the list of hosts is now unlimited.
251747. The lsearch lookup could not handle data where the length of text line was
2518 more than 4095 characters. Such lines were truncated, leading to shortened
2519 data being returned. It should now handle lines of any length.
252148. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2522 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2523 ACL").
252549. Cosmetic tidy to scripts like exicyclog that are generated by globally
2526 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2527 no longer happens in comment lines. A list of replacements is now placed
2528 at the head of all of the source files, except those whose only change is
2529 to replace PERL_COMMAND in the very first #! line.
253150. Replaced the slow insertion sort in queue.c, for sorting the list of
2532 messages on the queue, with a bottom-up merge sort, using code contributed
2533 by Michael Haardt. This should make operations like -bp somewhat faster on
2534 large queues. It won't affect queue runners, except when queue_run_in_order
2535 is set.
253751. Installed eximstats 1.31 in the distribution.
253952. Added support for SRV lookups to the dnslookup router.
254153. If an ACL referred to $message_body or $message_body_end, the value was not
2542 reset for any messages that followed in the same SMTP session.
254454. The store-handling optimization for building very long strings was not
2545 differentiating between the different store pools. I don't think this
2546 actually made any difference in practice, but I've tidied it.
254855. While running the routers to verify a sender address, $sender_address
2549 was still set to the sender address. This is wrong, because when routing to
2550 send a bounce to the sender, it would be empty. Therefore, I have changed
2551 it so that, while verifying a sender address, $sender_address is set to <>.
2552 (There is no change to what happens when verifying a recipient address.)
255456. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2555 target A or AAAA records (if not already returned) without resetting the
2556 qualify_single or search_parents options of the DNS resolver. These are
2557 inappropriate in this case because the targets of MX and SRV records must
2558 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2559 target that, when qualified, matched something in the local domain. These
2560 two options are now turned off when doing these lookups.
256257. It seems that at least some releases of Reiserfs (which does not have the
2563 concept of a fixed number of inodes) returns zero and not -1 for the
2564 number of available inodes. This interacted badly with check_spool_inodes,
2565 which assumed that -1 was the "no such thing" setting. What I have done is
2566 to check that the total number of inodes is greater than zero before doing
2567 the test of how many are available.
256958. When a "warn" ACL statement has a log_message modifier, the message is
2570 remembered, and not repeated. This is to avoid a lot of repetition when a
2571 message has many recipients that cause the same warning to be written.
2572 Howewer, Exim was preserving the list of already written lines for an
2573 entire SMTP session, which doesn't seem right. The memory is now reset if a
2574 new message is started.
257659. The "rewrite" debugging flag was not showing the result of rewriting in the
2577 debugging output unless log_rewrite was also set.
257960. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2580 of (int)(handle) when we know that handle contains (void *)(-1).
258261. The Exim daemon panic-logs an error return when it closes the incoming
2583 connection. However "connection reset by peer" seems to be common, and
2584 isn't really an error worthy of noting specially, so that particular error
2585 is no long logged.
258762. When Exim is trying to find all the local interfaces, it used to panic and
2588 die if the ioctl to get the interface flags failed. However, it seems that
2589 on at least one OS (Solaris 9) it is possible to have an interface that is
2590 included in the list of interfaces, but for which you get a failure error
2591 for this call. This happens when the interface is not "plumbed" into a
2592 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2593 failure of the "get flags" call assumes that the interface is down.
259563. Added a ${eval10: operator, which assumes all numbers are decimal. This
2596 makes life easier for people who are doing arithmetic on fields extracted
2597 from dates, where you often get leading zeros that should not be
2598 interpreted as octal.
260064. Added qualify_domain to the redirect router, to override the global
2601 setting.
260365. If a pathologically long header line contained very many addresses (the
2604 report of this problem mentioned 10 000) and each of them was rewritten,
2605 Exim could use up a very large amount of memory. (It kept on making new
2606 copies of the header line as it rewrote, and never released the old ones.)
2607 At the expense of a bit more processing, the header rewriting function has
2608 been changed so that it no longer eats memory in this way.
261066. The generation of the Received: header has been moved from the time that a
2611 message starts to be received, to the time that it finishes. The timestamp
2612 in the Received: header should now be very close to that of the <= log
2613 line. There are two side-effects of this change:
2615 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2616 logged header lines no longer include the local Received: line, because
2617 it has not yet been created. The same applies to a copy of the message
2618 that is returned to a non-SMTP sender when a message is rejected.
2620 (b) When a filter file is tested using -bf, no additional Received: header
2621 is added to the test message. After some thought, I decided that this
2622 is a bug fix.
2624 This change does not affect the value of $received_for. It is still set
2625 after address rewriting, but before local_scan() is called.
262767. Installed the latest Cygwin-specific files from the Cygwin maintainer.
262968. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2630 gave an unhelpful panic error message, and a defer error. I have managed to
2631 change this behaviour so that it now rejects any supplied certificate,
2632 which seems right, as the list of acceptable certificates is empty.
263469. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2635 gave an unhelpful defer error. I have not managed to make this reject any
2636 supplied certificates, but the error message it gives is "no certificate
2637 supplied", which is not helpful.
263970. exigrep's output now also includes lines that are not associated with any
2640 message, but which match the given pattern. Implemented by a patch from
2641 Martin Sluka, which also tidied up the Perl a bit.
264371. Recipient callout verification, like sender verification, was using <> in
2644 the MAIL FROM command. This isn't really the right thing, since the actual
2645 sender may affect whether the remote host accepts the recipient or not. I
2646 have changed it to use the actual sender in the callout; this means that
2647 the cache record is now keyed on a recipient/sender pair, not just the
2648 recipient address. There doesn't seem to be a real danger of callout loops,
2649 since a callout by the remote host to check the sender would use <>.
2650 [SEE ABOVE: changed after hitting problems.]
265272. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2653 temporary errors. However, in the case of such a code being given after
2654 the end of a data transmission (i.e. after ".") Exim was failing to write
2655 a retry record for the message. (Yes, there was some broken host that was
2656 actually sending 8xx at this point.)
265873. An unknown lookup type in a host list could cause Exim to panic-die when
2659 the list was checked. (An example that provoked this was putting <; in the
2660 middle of a list instead of at the start.) If this happened during a DATA
2661 ACL check, a -D file could be left lying around. This kind of configuration
2662 error no longer causes Exim to die; instead it causes a defer errror. The
2663 incident is still logged to the main and panic logs.
266574. Buglet left over from Exim 3 conversion. The message "too many messages
2666 in one connection" was written to the rejectlog but not the mainlog, except
2667 when address rewriting (yes!) was being logged.
266975. Added write_rejectlog option.
267176. When a system filter was run not as root (that is, when system_filter_user
2672 was set), the values of the $n variables were not being returned to the
2673 main process; thus, they were not subsequently available in the $sn
2674 variables.
267677. Added +return_path_on_delivery log selector.
267878. A connection timeout was being treated differently from recipients deferred
2679 when testing hosts_max_try with a message that was older than the host's
2680 retry timeout. (The host should not be counted, thus allowing all hosts to
2681 be tried at least once before bouncing.) This may have been the cause of an
2682 occasionally reported bug whereby a message would remain on the queue
2683 longer than the retry timeout, but would be bounced if a delivery was
2684 forced. I say "may" because I never totally pinned down the problem;
2685 setting up timeout/retry tests is difficult. See also the next item.
268779. The ultimate address timeout was not being applied to errors that involved
2688 a combination of host plus message (for example, a timeout on a MAIL
2689 command). When an address resolved to a number of possible hosts, and they
2690 were not all tried for each delivery (e.g. because of hosts_max_try), a
2691 message could remain on the queue longer than the retry timeout.
269380. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2694 Haardt.
269681. Fixed an obscure SMTP outgoing bug which required at least the following
2697 conditions: (a) there was another message waiting for the same server;
2698 (b) the server returned 5xx to all RCPT commands in the first message so
2699 that the message was not completed; (c) the server dropped the connection
2700 or gave a negative response to the RSET that Exim sends to abort the
2701 transaction. The observed case was a dropped connection after DATA that had
2702 been sent in pipelining mode. That is, the server had advertised PIPELINING
2703 but was not implementing it correctly. The effect of the bug was incorrect
2704 behaviour, such as trying another host, and this could lead to a crash.
2707Exim version 4.30
2710 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2711 and daemon.c were passed as pointers to ints; they should have been
2712 pointers to socklen_t variables (which are typically unsigned ints).
2714 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2715 fixed.
2717 3. Fixed a really odd bug that affected only the testing scheme; patching a
2718 certain fixed string in the binary changed the value of another string that
2719 happened to be identical to the end of the original first string.
2721 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2722 name", it returns that address as the IP address. On some operating
2723 systems (e.g. Solaris), it also passes back the IP address string as the
2724 "host name". However, on others (e.g. Linux), it passes back an empty
2725 string. Exim wasn't checking for this, and was changing the host name to an
2726 empty string, assuming it had been canonicized.
2728 5. Although rare, it is permitted to have more than one PTR record for a given
2729 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2730 all the names associated with an address, because they do in Solaris.
2731 However, it seems that they do not in Linux for data that comes from the
2732 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2733 I found this out when I moved to a new Linux workstation and tried to run
2734 the Exim test suite.
2736 To get round this problem I have changed the code so that it now does its
2737 own call to the DNS to look up PTR records when searching for a host name.
2738 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2739 addresses that are only in /etc/hosts are still found.
2741 This behaviour is, however, controlled by an option called host_lookup_
2742 order, which defaults to "bydns:byaddr". If people want to use the other
2743 order, or indeed, just use one or the other means of lookup, they can
2744 specify it in this variable.
2746 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2747 some operating systems, this comes back from gethostbyaddr() as an empty
2748 string, and this is what Exim used to test for. However, it seems that in
2749 other systems, "." is yielded. Exim now tests for this case too.
2751 7. The values of check_spool_space and check_log_space are now held internally
2752 as a number of kilobytes instead of an absolute number of bytes. If a
2753 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2754 kilobyte. This means that much larger values can be stored.
2756 8. Exim monitor: an attempt to get the action menu when not actually pointing
2757 at a message produces an empty menu entitled "No message selected". This
2758 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2759 no entries in it ("Shell widget menu has zero width and/or height"). So I
2760 have added a single, blank menu entry in this case.
2762 9. Added ${quote_local_part.
276410. MIME decoding is now applied to the contents of Subject: header lines when
2765 they are logged.
276711. Now that a reference to $sender_host_address automatically causes a reverse
2768 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2769 host lookup before query-style lookups in lists that might use this
2770 variable. This has therefore been abolished, and the "net-" prefix is no
2771 longer necessary for query-style lookups.
277312. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2774 have been a typo for LFLAGS, so it has been changed.
277613. The install script calls Exim with "-C /dev/null" in order to find the
2777 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2778 to be output. Howeve, since Exim outputs its version number before the
2779 error, it didn't break the script. It just looked ugly. I fixed this by
2780 always allowing "-C /dev/null" if the caller is root.
278214. Ignore overlarge ACL variable number when reading spool file - insurance
2783 against a later release with more variables having written the file.
278515. The standard form for an IPv6 address literal was being rejected by EHLO.
2786 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2787 this, as well as the form without the "IPv6" on the front.
278916. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2790 OS/Makefile-Darwin file.
279217. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2793 only to LDAP libraries that do not have LDAP_OPT_DEREF.
279518. After change 4.21/52, "%ld" was used to format the contents of the $inode
2796 variable. However, some OS use ints for inodes. I've added cast to long int
2797 to get rid of the compiler warning.
279919. I had forgotten to lock out "/../" in configuration file names when
2800 ALT_CONFIG_PREFIX was set.
280220. Routers used for verification do not need to specify transports. However,
2803 if such a router generated a host list, and callout was configured, Exim
2804 crashed, because it could not find a port number from the (non-existent)
2805 transport. It now assumes port 25 in this circumstance.
280721. Added the -t option to exigrep.
280922. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2810 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2811 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2812 them is set, LOOKUP_LSEARCH is forced.
281423. "exim -bV" now outputs a list of lookups that are included in the binary.
281624. Added sender and host information to the "rejected by local_scan()" log
2817 line; previously there was no indication of these.
281925. Added .include_if_exists.
282126. Change 3.952/11 added an explicit directory sync on top of a file sync for
2822 Linux. It turns out that not all file systems support this. Apparently some
2823 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2824 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2825 not supported on the file descriptor, is now ignored when Exim is trying to
2826 sync a directory. This applies only to Linux.
282827. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
283028. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2831 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2832 this.
283429. Added support for maildirsize files from supplied patch (modified a bit).
283630. The use of :fail: followed by an empty string could lead Exim to respond to
2837 sender verification failures with (e.g.):
2839 550 Verification failed for <xxx>
2840 550 Sender verify failed
2842 where the first response line was missing the '-' that indicates it is not
2843 the final line of the response.
284531. The loop for finding the name of the user that called Exim had a hardwired
2846 limit of 10; it now uses the value of finduser_retries, which is used for
2847 all other user lookups.
284932. Added $received_count variable, available in data and not_smtp ACLs, and at
2850 delivery time.
285233. Exim was neglecting to zero errno before one call of strtol() when
2853 expanding a string and expecting an integer value. On some systems this
2854 resulted in spurious "integer overflow" errors. Also, it was casting the
2855 result into an int without checking.
285734. Testing for a connection timeout using "timeout_connect" in the retry rules
2858 did not work. The code looks as if it has *never* worked, though it appears
2859 to have been documented since at least releast 1.62. I have made it work.
286135. The "timeout_DNS" error in retry rules, also documented since at least
2862 1.62, also never worked. As it isn't clear exactly what this means, and
2863 clearly it isn't a major issue, I have abolished the feature by treating it
2864 as "timeout", and writing a warning to the main and panic logs.
286636. The display of retry rules for -brt wasn't always showing the error code
2867 correctly.
286937. Added new error conditions to retry rules: timeout_A, timeout_MX,
2870 timeout_connect_A, timeout_connect_MX.
287238. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2873 to the empty sender.
287539. The daemon was not analysing the content of -oX till after it had closed
2876 stderr and disconnected from the controlling terminal. This meant that any
2877 syntax errors were only noted on the panic log, and the return code from
2878 the command was 0. By re-arranging the code a little, I've made the
2879 decoding happen first, so such errors now appear on stderr, and the return
2880 code is 1. However, the actual setting up of the sockets still happens in
2881 the disconnected process, so errors there are still only recorded on the
2882 panic log.
288440. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2885 connections (as happens on some IP stacks) was logged at start up time as
2886 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2887 it from "IPv6 and IPv4", which means that two separate sockets are being
2888 used.
289041. The debug output for gethostbyname2() or getipnodebyname() failures now
2891 says whether AF_INET or AF_INET6 was passed as an argument.
289342. Exiwhat output was messed up when time zones were included in log
2894 timestamps.
289643. Exiwhat now gives more information about the daemon's listening ports,
2897 and whether -tls-on-connect was used.
289944. The "port" option of the smtp transport is now expanded.
290145. A "message" modifier in a "warn" statement in a non-message ACL was being
2902 silently ignored. Now an error message is written to the main and panic
2903 logs.
290546. There's a new ACL modifier called "logwrite" which writes to a log file
2906 as soon as it is encountered.
290847. Added $local_user_uid and $local_user_gid at routing time.
291048. Exim crashed when trying to verify a sender address that was being
2911 rewritten to "<>".
291349. Exim was recognizing only a space character after ".include". It now also
2914 recognizes a tab character.
291650. Fixed several bugs in the Perl script that creates the exim.8 man page by
2917 extracting the relevant information from the specification. The man page no
2918 longer contains scrambled data for the -d option, and I've added a section
2919 at the front about calling Exim under different names.
292151. Added "extra_headers" argument to the "mail" command in filter files.
292352. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2924 crash.
292653. Installed eximstats 1.29.
292854. Added transport_filter_timeout as a generic transport option.
293055. Exim no longer adds an empty Bcc: header to messages that have no To: or
2931 Cc: header lines. This was required by RFC 822, but it not required by RFC
2932 2822.
293456. Exim used to add From:, Date:, and Message-Id: header lines to any
2935 incoming messages that did not have them. Now it does so only if the
2936 message originates locally, that is, if there is no associated remote host
2937 address. When Resent- header lines are present, this applies to the Resent-
2938 lines rather than the non-Resent- lines.
294057. Drop incoming SMTP connection after too many syntax or protocol errors. The
2941 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
294358. Messages for configuration errors now include the name of the main
2944 configuration file - useful now that there may be more than one file in a
2945 list (.included file names were always shown).
294759. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2948 for those rare installations that do not start the daemon as root or run it
2949 setuid root. I've cut out the call to initgroups() if the daemon is not
2950 root at that time.
295260. The Exim user and group can now be bound into the binary as text strings
2953 that are looked up at the start of Exim's processing.
295561. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
295762. Added $mailstore_basename variable.
295963. Installed patch to sieve.c from Michael Haardt.
296164. When Exim failed to open the panic log after failing to open the main log,
2962 the original message it was trying to log was written to stderr and debug
2963 output, but if they were not available (the usual case in production), it
2964 was lost. Now it is written to syslog before the two lines that record the
2965 failures to open the logs.
296765. Users' Exim filters run in subprocesses under the user's uid. It is
2968 possible for a "deliver" command or an alias in a "personal" command to
2969 provoke an address rewrite. If logging of address rewriting is configured,
2970 this fails because the process is not running as root or exim. There may be
2971 a better way of dealing with this, but for the moment (because 4.30 needs
2972 to be released), I have disabled address rewrite logging when running a
2973 filter in a non-root, non-exim process.
2976Exim version 4.24
2979 1. The buildconfig auxiliary program wasn't quoting the value set for
2980 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2981 not defined. This bug was masked in 4.22 by the effect that was fixed in
2982 change 4.23/1.
2984 2. Some messages that were rejected after a message id was allocated were
2985 shown as "incomplete" by exigrep. It no longer does this for messages that
2986 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2988 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2989 have allow_domain_literals set, the ID did not get logged in the <= line.
2990 Domain literals are now always recognized in Message-ID: header lines.
2992 4. The first argument for a ${extract expansion item is the key name or field
2993 number. Leading and trailing spaces in this item were not being ignored,
2994 causing some misleading effects.
2996 5. When deliver_drop_privilege was set, single queue runner processes started
2997 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2998 same command in the process it spins off) were not dropping privilege.
3000 6. When the daemon running as "exim" started a queue runner, it always
3001 re-executed Exim in the spun-off process. This is a waste of effort when
3002 deliver_drop_privilege is set. The new process now just calls the
3003 queue-runner function directly.
3006Exim version 4.23
3009 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3012 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3013 ignored. Though the use of -oP was forcing the writing of a pid file, it
3014 was always written to the default place.
3016 3. If the message "no IP address found for host xxxx" is generated during
3017 incoming verification, it is now followed by identification of the incoming
3018 connection (so you can more easily find what provoked it).
3020 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3022 5. Added some features to "harden" Exim a bit more against certain attacks:
3024 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3025 be put in Local/Makefile. This is like the never_users runtime option,
3026 but it cannot be overridden. The default setting is "root".
3028 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3029 prefix string with which any file named in a -C command line option
3030 must start.
3032 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3033 is retained for -C and -D only if the caller of Exim is root. Without
3034 it, the exim user may also use -C and -D and retain privilege.
3036 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3037 command line option is disabled.
3039 6. Macro names set by the -D option must start with an upper case letter, just
3040 like macro names defined in the configuration file.
3042 7. Added "dereference=" facility to LDAP.
3044 8. Two instances of the typo "uknown" in the source files are fixed.
3046 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3047 the Configure-Makefile script screwed up while processing it.
304910. Incorporated PCRE 4.4.
305111. The SMTP synchronization check was not operating right at the start of an
3052 SMTP session. For example, it could not catch a HELO sent before the client
3053 waited for the greeting. There is now a check for outstanding input at the
3054 point when the greeting is written. Because of the duplex, asynchronous
3055 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3056 way, but not yet received, when the check is performed.
305812. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3059 on TCP/IP sockets, because this apparently causes some broken clients to
3060 timeout.
306213. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3063 unchanged) from the Cygwin maintainer.
306514. The code for -bV that shows what is in the binary showed "mbx" when maildir
3066 was supported instead of testing for mbx. Effectively a typo.
306815. The spa authenticator server code was not checking that the input it
3069 received was valid base64.
307116. The debug output line for the "set" modifier in ACLs was not showing the
3072 name of the variable that was being set.
307417. Code tidy: the variable type "vtype_string" was never used. Removed it.
307618. Previously, a reference to $sender_host_name did not cause a DNS reverse
3077 lookup on its own. Something else was needed to trigger the lookup. For
3078 example, a match in host_lookup or the need for a host name in a host list.
3079 Now, if $sender_host_name is referenced and the host name has not yet been
3080 looked up, a lookup is performed. If the lookup fails, the variable remains
3081 empty, and $host_lookup_failed is set to "1".
308319. Added "eqi" as a case-independent comparison operator.
308520. The saslauthd authentication condition could segfault if neither service
3086 nor realm was specified.
308821. If an overflowing value such as "2048M" was set for message_size_limit, the
3089 error message that was logged was misleading, and incoming SMTP
3090 connections were dropped. The message is now more accurate, and temporary
3091 errors are given to SMTP connections.
309322. In some error situations (such as 21 above) Exim rejects all SMTP commands
3094 (except RSET) with a 421 error, until QUIT is received. However, it was
3095 failing to send a response to QUIT.
309723. The HELO ACL was being run before the code for helo_try_verify_hosts,
3098 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3099 ACL is now run after the helo_try_verify_hosts code.
310124. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3102 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3103 case-independent, so other case variants are also recognized). Apparently
3104 some systems use these upper case variants.
310625. If more than two messages were waiting for the same host, and a transport
3107 filter was specified for the transport, Exim sent two messages over the
3108 same TCP/IP connection, and then failed with "socket operation on non-
3109 socket" when it tried to send the third.
311126. Added Exim::debug_write and Exim::log_write for embedded Perl use.
311327. The extern definition of crypt16() in expand.c was not being excluded when
3114 the OS had its own crypt16() function.
311628. Added bounce_return_body as a new option, and bounce_return_size_limit
3117 as a preferred synonym for return_size_limit, both as an option and as an
3118 expansion variable.
312029. Added LIBS=-liconv to OS/Makefile-OSF1.
312230. Changed the default configuration ACL to relax the local part checking rule
3123 for addresses that are not in any local domains. For these addresses,
3124 slashes and pipe symbols are allowed within local parts, but the sequence
3125 /../ is explicitly forbidden.
312731. SPA server authentication was not clearing the challenge buffer before
3128 using it.
313032. log_message in a "warn" ACL statement was writing to the reject log as
3131 well as to the main log, which contradicts the documentation and doesn't
3132 seem right (because no rejection is happening). So I have stopped it.
313433. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3135 However, I am unable to do any testing of this.
313734. Fixed an infelicity in the appendfile transport. When checking directories
3138 for a mailbox, to see if any needed to be created, it was accidentally
3139 using path names with one or more superfluous leading slashes; tracing
3140 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
314235. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3143 contents are added to the log line that is written for every discarded
3144 recipient. (Previously a log_message setting was ignored.)
314636. The ${quote: operator now quotes the string if it is empty.
314837. The install script runs exim in order to find its version number. If for
3149 some reason other than non-existence or emptiness, which it checks, it
3150 could not run './exim', it was installing it with an empty version number,
3151 i.e. as "exim-". This error state is now caught, and the installation is
3152 aborted.
315438. An argument was missing from the function that creates an error message
3155 when Exim fails to connect to the socket for saslauthd authentication.
3156 This could cause Exim to crash, or give a corrupted message.
315839. Added isip, isip4, and isip6 to ${if conditions.
316040. The ACL variables $acl_xx are now saved with the message, and can be
3161 accessed later in routers, transports, and filters.
316341. The new lookup type nwildlsearch is like wildlsearch, except that the key
3164 strings in the file are not string-expanded.
316642. If a MAIL command specified a SIZE value that was too large to fit into an
3167 int variable, the check against message_size_limit failed. Such values are
3168 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3169 day this will have to be increased, but I don't think I want to be around
3170 when emails are that large.
3174Exim version 4.22
3177 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3178 iconv() is not standard in FreeBSD.
3180 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3181 IPv6 enabled. The observed symptom was a segmentation fault on return from
3182 the function os_common_find_running_interfaces() in src/os.c.
3184 3. In the check_special_case() function in daemon.c I had used "errno" as an
3185 argument name, which causes warnings on some systems. This was basically a
3186 typo, since it was named "eno" in the comments!
3188 4. The code that waits for the clock to tick (at a resolution of some fraction
3189 of a second) so as to ensure message-id uniqueness was always waiting for
3190 at least one whole tick, when it could have waited for less. [This is
3191 almost certainly not relevant at current processor speeds, where it is
3192 unlikely to ever wait at all. But we try to future-proof.]
3194 5. The function that sleeps for a time interval that includes fractions of a
3195 second contained a race. It did not block SIGALRM between setting the
3196 timer, and suspending (a couple of lines later). If the interval was short
3197 and the sigsuspend() was delayed until after it had expired, the suspension
3198 never ended. On busy systems this could lead to processes getting stuck for
3199 ever.
3201 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3202 process, before it forks any delivery processes. The open lookup caching
3203 mechanism meant that the open file or database connection was passed into
3204 the delivery process. The problem was that delivery processes always tidy
3205 up cached lookup data. This could cause a problem for the next delivery
3206 process started by the queue runner, because the external queue runner
3207 process does not know about the closure. So the next delivery process
3208 still has data in the lookup cache. In the case of a file lookup, there was
3209 no problem because closing a file descriptor in a subprocess doesn't affect
3210 the parent. However, if the lookup was caching a connection to a database,
3211 the connection was closed, and the second delivery process was likely to
3212 see errors such as "PGSQL: query failed: server closed the connection
3213 unexpectedly". The problem has been fixed by closing all cached lookups
3214 in a queue runner before running a delivery process.
3216 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3217 seem to have the "const" qualifier which it has on other OS. I've
3218 parameterised it.
3220 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3221 *of the same type* (client or server) with the same public name that an
3222 error should be diagnosed.
3224 9. When Exim looked up a host name for an IP address, but failed to find the
3225 original IP address when looking up the host name (a safety check), it
3226 output the message "<ip address> does not match any IP for NULL", which was
3227 confusing, to say the least. The bug was that the host name should have
3228 appeared instead of "NULL".
323010. Since release 3.03, if Exim is called by a uid other than root or the Exim
3231 user that is built into the binary, and the -C or -D options is used, root
3232 privilege is dropped before the configuration file is read. In addition,
3233 logging is switched to stderr instead of the normal log files. If the
3234 configuration then re-defines the Exim user, the unprivileged environment
3235 is probably not what is expected, so Exim logs a panic warning message (but
3236 proceeds).
3238 However, if deliver_drop_privilege is set, the unprivileged state may well
3239 be exactly what is intended, so the warning has been cut out in that case,
3240 and Exim is allowed to try to write to its normal log files.
3243Exim version 4.21
3246 1. smtp_return_error_details was not giving details for temporary sender
3247 or receiver verification errors.
3249 2. Diagnose a configuration error if two authenticators have the same public
3250 name.
3252 3. Exim used not to create the message log file for a message until the first
3253 delivery attempt. This could be confusing when incoming messages were held
3254 for policy or load reasons. The message log file is now created at the time
3255 the message is received, and an initial "Received" line is written to it.
3257 4. The automatically generated man page for command line options had a minor
3258 bug that caused no ill effects; however, a more serious problem was that
3259 the procedure for building the man page automatically didn't always
3260 operate. Consequently, release 4.20 contains an out-of-date version. This
3261 shouldn't happen again.
3263 5. When building Exim with embedded Perl support, the script that builds the
3264 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3265 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3267 6. The freeze_tell option was not being used for messages that were frozen on
3268 arrival, either by an ACL or by local_scan().
3270 7. Added the smtp_incomplete_transaction log selector.
3272 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3273 was accepting AUTH without a new EHLO.
3275 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3276 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3277 RFC.
327910. Logging of TCP/IP connections (when configured) now happens in the main
3280 daemon process instead of the child process, so that the TCP/IP connection
3281 count is more accurate (but it can never be perfect).
328311. The use of "drop" in a nested ACL was not being handled correctly in the
3284 outer ACL. Now, if condition failure induced by the nested "drop" causes
3285 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3286 or "require"), the connection is dropped.
328812. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3289 that yield "discard" can now be used with an "accept" or a "discard" verb,
3290 but an error is generated for any others (because I can't see a useful way
3291 to define what should happen).
329313. When an ACL is read dynamically from a file (or anywhere else), the lines
3294 are now processed in the same way as lines in the Exim configuration file.
3295 In particular, continuation lines are supported.
329714. Added the "dnslists = a.b.c!=n.n.n.n" feature.
329915. Added -ti meaning -t -i.
330116. Check for letters, digits, hyphens, and dots in the names of dnslist
3302 domains, and warn by logging if others are found.
330417. At least on BSD, alignment is not guarenteed for the array of ifreq's
3305 returned from GIFCONF when Exim is trying to find the list of interfaces on
3306 a host. The code in os.c has been modified to copy each ifreq to an aligned
3307 structure in all cases.
3309 Also, in some cases, the returned ifreq's were being copied to a 'struct
3310 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3311 means the last couple of bytes of an IPv6 address could be chopped if the
3312 ifreq contained only a normal sockaddr (14 bytes storage).
331418. Named domain lists were not supported in the hosts_treat_as_local option.
3315 An entry such as +xxxx was not recognized, and was treated as a literal
3316 domain name.
331819. Ensure that header lines added by a DATA ACL are included in the reject log
3319 if the ACL subsequently rejects the message.
332120. Upgrade the utility script to use Digest::MD5 instead of just
3322 MD5 (which is deprecated).
332421. When testing a filter file using -bf, Exim was writing a message when it
3325 took the sender from a "From " line in the message, but it was not doing so
3326 when it took $return_path from a Return-Path: header line. It now does.
332822. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3329 with a valid header line field name (a series of printing characters
3330 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
333223. Changed "disc" in the source to "disk" to conform to the documentation and
3333 the book and for uniformity.
333524. Ignore Sendmail's -Ooption=value command line item.
333725. When execve() failed while trying to run a command in a pipe transport,
3338 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3339 could be confused with a return value of 69 from the command itself. This
3340 has been changed to 127, the value the shell returns if it is asked to run
3341 a non-existent command. The wording for the related log line suggests a
3342 non-existent command as the problem.
334426. If received_header_text expands to an empty string, do not add a Received:
3345 header line to the message. (Well, it adds a token one on the spool, but
3346 marks it "old" so that it doesn't get used or transmitted.)
334827. Installed eximstats 1.28 (addition of -nt option).
335028. There was no check for failure on the call to getsockname() in the daemon
3351 code. This can fail if there is a shortage of resources on the system, with
3352 ENOMEM, for example. A temporary error is now given on failure.
335429. Contrary to the C standard, it seems that in some environments, the
3355 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3356 program. Exim now does this explicitly; it affects the formatting of
3357 timestamps using strftime().
335930. If exiqsumm was given junk data, it threw up some uninitialized variable
3360 complaints. I've now initialized all the variables, to avoid this.
336232. Header lines added by a system filter were not being "seen" during
3363 transport-time rewrites.
336533. The info_callback() function passed to OpenSSL is set up with type void
3366 (*)(SSL *, int, int), as described somewhere. However, when calling the
3367 function (actually a macro) that sets it up, the type void(*)() is
3368 expected. I've put in a cast to prevent warnings from picky compilers.
337034. If a DNS black list lookup found a CNAME record, but there were no A
3371 records associated with the domain it pointed at, Exim crashed.
337335. If a DNS black list lookup returned more than one A record, Exim ignored
3374 all but the first. It now scans all returned addresses if a particular IP
3375 value is being sought. In this situation, the contents of the
3376 $dnslist_value variable are a list of all the addresses, separated by a
3377 comma and a space.
337936. Tightened up the rules for host name lookups using reverse DNS. Exim used
3380 to accept a host name and all its aliases if the forward lookup for any of
3381 them yielded the IP address of the incoming connection. Now it accepts only
3382 those names whose forward lookup yields the correct IP address. Any other
3383 names are discarded. This closes a loophole whereby a rogue DNS
3384 administrator could create reverse DNS records to break through a
3385 wildcarded host restriction in an ACL.
338737. If a user filter or a system filter that ran in a subprocess used any of
3388 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3389 the wrong values were passed to the pipe command ($thisaddress had the
3390 value of $0, $0 had the value of $1, etc). This bug was introduced by
3391 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
339338. Improved the line breaking for long SMTP error messages from ACLs.
3394 Previously, if there was no break point between 40 and 75 characters, Exim
3395 left the rest of the message alone. Two changes have been made: (a) I've
3396 reduced the minimum length to 35 characters; (b) if it can't find a break
3397 point between 35 and 75 characters, it looks ahead and uses the first one
3398 that it finds. This may give the occasional overlong line, but at least the
3399 remaining text gets split now.
340139. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3402 file descriptors might be low, and that setting 1000 would always raise it.
3403 It turns out that in some environments, the limit is already over 1000 and
3404 that lowering it causes trouble. So now Exim takes care not to decrease it.
340640. When delivering a message, the value of $return_path is set to $sender_
3407 address at the start of routing (routers may change the value). By an
3408 oversight, this default was not being set up when an address was tested by
3409 -bt or -bv, which affected the outcome if any router or filter referred to
3410 $return_path.
341241. The idea of the "warn" ACL verb is that it adds a header or writes to the
3413 log only when "message" or "log_message" are set. However, if one of the
3414 conditions was an address verification, or a call to a nested ACL, the
3415 messages generated by the underlying test were being passed through. This
3416 no longer happens. The underlying message is available in $acl_verify_
3417 message for both "message" and "log_message" expansions, so it can be
3418 passed through if needed.
342042. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3421 new expansion $bh_ to give the encoded byte string without charset
3422 translation. Translation happens only if iconv() is available; HAVE_ICONV
3423 indicates this at build time. HEADERS_CHARSET gives the charset to
3424 translate to; headers_charset can change it in the configuration, and
3425 "headers charset" can change it in an individual filter file.
342743. Now that we have a default RFC 2047 charset (see above), the code in Exim
3428 that creates RFC 2047 encoded "words" labels them as that charset instead
3429 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3430 expansion operator; (ii) when Exim creates a From: line for a local
3431 message; (iii) when a header line is rewritten to include a "phrase" part.
343344. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3434 buggy, causing it to skip the first lines of messages whose message ID
3435 ended in 'D'. This would not have bitten before Exim release 4.14, because
3436 message IDs were unlikely to end in 'D' before then. The effect was to have
3437 incorrect size information for certain domains.
343945. #include "config.h" was missing at the start of the crypt16.c module. This
3440 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3441 noticed.
344346. If there was a timeout during a "random" callout check, Exim treated it as
3444 a failure of the random address, and carried on sending RSET and the real
3445 address. If the delay was just some slowness somewhere, the response to the
3446 original RCPT would be taken as a response to RSET and so on, causing
3447 mayhem of various kinds.
344947. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3450 when I implemented it. It didn't allow for the fact that some option values
3451 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3452 the right test for positive values.
345448. Domain names in DNS records are case-independent. Exim always looks them up
3455 in lower case. Some resolvers return domain names in exactly the case they
3456 appear in the zone file, that is, they may contain uppercase letters. Not
3457 all resolvers do this - some return always lower case. Exim was treating a
3458 change of case by a resolver as a change of domain, similar to a widening
3459 of a domain abbreviation. This triggered its re-routing code and so it was
3460 trying to route what was effectively the same domain again. This normally
3461 caused routing to fail (because the router wouldn't handle the domain
3462 twice). Now Exim checks for this case specially, and just changes the
3463 casing of the domain that it ultimately uses when it transmits the message
3464 envelope.
346649. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3467 module.
346950. If a filter generated a file delivery with a non-absolute name (possible if
3470 no home directory exists for the router), the forbid_file option was not
3471 forbidding it.
347351. Added '&' feature to dnslists, to provide bit mask matching in addition to
3474 the existing equality matching.
347652. Exim was using ints instead of ino_t variables in some places where it was
3477 dealing with inode numbers.
347953. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3480 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3481 called TMPDIR, and if it finds it is different, it changes its value.
348354. The smtp_printf() function is now made available to local_scan() so
3484 additional output lines can be written before returning. There is also an
3485 smtp_fflush() function to enable the detection of a dropped connection.
3486 The variables smtp_input and smtp_batched_input are exported to
3487 local_scan().
348955. Changed the default runtime configuration: the message "Unknown user"
3490 has been removed from the ACL, and instead placed on the localuser router,
3491 using the cannot_route_message feature. This means that any verification
3492 failures that generate their own messages won't get overridden. Similarly,
3493 the "Unrouteable address" message that was in the ACL for unverifiable
3494 relay addresses has also been removed.
349656. Added hosts_avoid_esmtp to the smtp transport.
349857. The exicyclog script was not checking for the esoteric option
3499 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3500 will work only if exicyclog is run under the appropriate euid.
350258. Following a discussion on the list, the rules by which Exim recognises line
3503 endings on incoming messages have been changed. The -dropcr and drop_cr
3504 options are now no-ops, retained only for backwards compatibility. The
3505 following line terminators are recognized: LF CRLF CR. However, special
3506 processing applies to CR:
3508 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3509 nor a local message in the state where . is a terminator.
3511 (ii) If a bare CR is encountered in a header line, an extra space is added
3512 after the line terminator so as not to end the header. The reasoning
3513 behind this is that bare CRs in header lines are most likely either
3514 to be mistakes, or people trying to play silly games.
351659. The size of a message, as listed by "-bp" or in the Exim monitor window,
3517 was being incorrectly given as 18 bytes larger than it should have been.
3518 This is a VOB (very old bug).
352060. This may never have affected anything current, but just in case it has:
3521 When the local host is found other than at the start of a list of hosts,
3522 the local host, those with the same MX, and any that follow, are discarded.
3523 When the list in question was part of a longer list of hosts, the following
3524 hosts (not currently being processed) were also being discarded. This no
3525 longer happens. I'm not sure if this situation could ever has previously
3526 arisen.
352861. Added the "/MX" feature to lists of hosts in the manualroute and query
3529 program routers.
353162. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3532 header. This is something that is recommended in a new Internet Draft, and
3533 is something that is documented as being done by Sendmail. There are two
3534 possible values. For messages generated by the autoreply transport, Exim
3535 adds:
3537 Auto-Submitted: auto-replied
3539 whereas for all other generated messages (e.g. bounces) it adds
3541 Auto-Submitted: auto-generated
354363. The "personal" condition in filters now includes a test for the
3544 Auto-Submitted: header. If it contains the string "auto-" the message it
3545 not considered personal.
354764. Added rcpt_include_affixes as a generic transport option.
354965. Added queue_only_override (default true).
355166. Added the syslog_duplication option.
355367. If what should have been the first header line of a message consisted of
3554 a space followed by a colon, Exim was mis-interpreting it as a header line.
3555 It isn't of course - it is syntactically invalid and should therefore be
3556 treated as the start of the message body. The misbehaviour could have
3557 caused a number of strange effects, including loss of data in subsequent
3558 header lines, and spool format errors.
356068. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3561 client host had authenticated. This control can now be exercised by an ACL
3562 for more flexibility.
356469. By default, callouts do not happen when testing with -bh. There is now a
3565 variant, -bhc, which does actually run the callout code, including
3566 consulting and updating the callout cache.
356870. Added support for saslauthd authentication, courtesy of Alexander
3569 Sabourenkov.
357171. If statvfs() failed on the spool or log directories while checking their
3572 size for availability, Exim confusingly gave the error "space shortage".
3573 Furthermore, in debugging mode it crashed with a floating point exception.
3574 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3575 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3576 serious problem, Exim now writes to the main and panic logs when this
3577 happens, with details of the failure. It then refuses to accept the
3578 incoming message, giving the message "spool directory problem" or "log
3579 directory problem" with a 421 code for SMTP messages.
358172. When Exim is about to re-exec itself, it ensures that the file descriptors
3582 0, 1, and 2 exist, because some OS complain for execs without them (see
3583 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3584 descriptors. However, the code omitted to check that the open succeeded,
3585 causing mysterious errors if for some reason the permissions on /dev/null
3586 got screwed. Now Exim writes a message to the main and panic logs, and
3587 bombs out if it can't open /dev/null.
358973. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3590 interact so that it is all more flexible. It is supposed to remain
3591 backwards compatible. Also added extra_local_interfaces.
359374. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3594 to bomb out with an assertion failure - to the client this appears as a
3595 connection drop. This problem occurs in the part of the code that was taken
3596 from the Samba project. Fortunately, the assertion is in a very simple
3597 function, so I have fixed this by reproducing the function inline in the
3598 one place where it is called, and arranging for authentication to fail
3599 instead of killing the process with assert().
360175. The SPA client code was not working when the server requested OEM rather
3602 than Unicode encoding.
360476. Added code to make require_files with a specific uid setting more usable in
3605 the case where statting the file as root fails - usually a non-root-mounted
3606 NFS file system. When this happens and the failure is EACCES, Exim now
3607 forks a subprocess and does the per-uid checking as the relevant uid.
360977. Added process_log_path.
361178. If log_file_path was not explicitly set, a setting of check_log_space or
3612 check_log_inodes was ignored.
361479. If a space check for the spool or log partitions fails, the incident is now
3615 logged. Of course, in the latter case the data may get lost...
361780. Added the %p formatting code to string_format() so that it can be used to
3618 print addresses in debug_print(). Adjusted all the address printing in the
3619 debugging in store.c to use %p rather than %d.
362181. There was a concern that a line of code in smtp_in.c could overflow a
3622 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3623 initially expressed, the concern was not well-founded, because trailing
3624 spaces are removed early. However, if the trailing spaces were followed by
3625 a NULL, they did not get removed, so the overflow was possible. Two fixes
3626 were applied:
3628 (a) I re-wrote the offending code in a cleaner fashion.
3629 (b) If an incoming SMTP command contains a NULL character, it is rejected
3630 as invalid.
363282. When Exim changes uid/gid to the Exim user at daemon start time, it now
3633 runs initgroups(), so that if the Exim user is in any additional groups,
3634 they will be used during message reception.
3637Exim version 4.20
3640The change log for 4.20 and earlier releases has been archived.