Removed -DBIND_8_COMPAT from OS/Makefile-Darwin on the advice of Mac OS
[exim.git] / doc / doc-txt / ChangeLog
f78eb7c6 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.290 2006/02/10 14:25:43 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.
70PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
71 compiled. In many other places in Exim, IPv6 addresses are always
72 recognized, so I have changed this. It also means that IPv4 domain
73 literals of the form [IPV4:n.n.n.n] are now always recognized.
75PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
76 used if the router is not running as root, for example, when verifying at
77 ACL time, or when using -bh. The debugging output from this situation was
78 non-existent - all you got was a failure to exec. I have made two
79 changes:
81 (a) Failures to set uid/gid, the current directory, or a process leader
82 in a subprocess such as that created by queryprogram now generate
83 suitable debugging ouput when -d is set.
85 (b) The queryprogram router detects when it is not running as root,
86 outputs suitable debugging information if -d is set, and then runs
87 the subprocess without attempting to change uid/gid.
89PH/15 Minor change to Makefile for building test_host (undocumented testing
90 feature).
92PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
93 additional section of a DNS packet that returns MX or SRV records.
94 Instead, it always explicitly searches for A/AAAA records. This avoids
95 major problems that occur when a DNS server includes only records of one
96 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
97 fixed another bug: if SRV records were looked up and the corresponding
98 address records were *not* found in the additional section, the port
99 values from the SRV records were lost.
101PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
102 using the correct key (the original address) when searching the retry
103 rules in order to find which one to use for generating the retry hint.
105PH/18 If quota_warn_message contains a From: header, Exim now refrains from
106 adding the default one. Similarly, if it contains a Reply-To: header, the
107 errors_reply_to option, if set, is not used.
109PH/19 When calculating a retry time, Exim used to measure the "time since
110 failure" by looking at the "first failed" field in the retry record. Now
111 it does not use this if it is later than than the arrival time of the
112 message. Instead it uses the arrival time. This makes for better
113 behaviour in cases where some deliveries succeed, thus re-setting the
114 "first failed" field. An example is a quota failure for a huge message
115 when small messages continue to be delivered. Without this change, the
116 "time since failure" will always be short, possible causing more frequent
117 delivery attempts for the huge message than are intended.
119PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
1349e1e5 123
214e2000 124
125Exim version 4.60
128PH/01 Two changes to the default runtime configuration:
130 (1) Move the checks for relay_from_hosts and authenticated clients from
131 after to before the (commented out) DNS black list checks.
133 (2) Add control=submission to the relay_from_hosts and authenticated
134 clients checks, on the grounds that messages accepted by these
135 statements are most likely to be submissions.
5de37277 136
137PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
139 (1) Generate an error if the third argument for the ${prvs expansion is
140 not a single digit.
142 (2) Treat a missing third argument of ${prvscheck as if it were an empty
143 string.
145 (3) Reset the variables that are obtained from the first argument of
146 ${prvscheck and used in the second argument before leaving the code,
147 because their memory is reclaimed, so using them afterwards may do
148 silly things.
150 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
151 one (it's much easier than Tom thought :-).
153 (5) Because of (4), we can now allow for the use of $prvscheck_result
154 inside the third argument.
cb9328de 155
156PH/03 For some reason, the default setting of PATH when running a command from
157 a pipe transport was just "/usr/bin". I have changed it to
158 "/bin:/usr/bin".
161 anything to be listed in the output from -bV.
b2f5a032 162
163PH/05 When a filter generated an autoreply, the entire To: header line was
164 quoted in the delivery log line, like this:
166 => >A.N.Other <ano@some.domain> <original@ddress> ...
168 This has been changed so that it extracts the operative address. There
169 may be more than one such address. If so, they are comma-separated, like
170 this:
172 => >ano@some.domain,ona@other.domain <original@ddress> ...
174PH/06 When a client host used a correct literal IP address in a HELO or EHLO
175 command, (for example, EHLO []) and the client's IP address was
176 not being looked up in the rDNS to get a host name, Exim was showing the
177 IP address twice in Received: lines, even though the IP addresses were
178 identical. For example:
180 Received: from [] (helo=[])
182 However, if the real host name was known, it was omitting the HELO data
183 if it matched the actual IP address. This has been tidied up so that it
184 doesn't show the same IP address twice.
186PH/07 When both +timestamp and +memory debugging was on, the value given by
187 $tod_xxx expansions could be wrong, because the tod_stamp() function was
188 called by the debug printing, thereby overwriting the timestamp buffer.
189 Debugging no longer uses the tod_stamp() function when +timestamp is set.
191PH/08 When the original message was included in an autoreply transport, it
192 always said "this is a copy of the message, including all the headers",
193 even if body_only or headers_only was set. It now gives an appropriate
194 message.
196PH/09 Applied a patch from the Sieve maintainer which:
198 o fixes some comments
199 o adds the (disabled) notify extension core
200 o adds some debug output for the result of if/elsif tests
201 o points to the current vacation draft in the documentation
202 and documents the missing references header update
204 and most important:
206 o fixes a bug in processing the envelope test (when testing
207 multiple envelope elements, the last element determinted the
208 result)
210PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
211 Electronic Mail") by including:
213 Auto-submitted: auto-generated
215 in the messages that it generates (bounce messages and others, such as
216 warnings). In the case of bounce messages for non-SMTP mesages, there was
217 also a typo: it was using "Auto_submitted" (underscore instead of
218 hyphen). Since every message generated by Exim is necessarily in response
219 to another message, thes have all been changed to:
221 Auto-Submitted: auto-replied
223 in accordance with these statements in the RFC:
225 The auto-replied keyword:
227 - SHOULD be used on messages sent in direct response to another
228 message by an automatic process,
230 - MUST NOT be used on manually-generated messages,
232 - MAY be used on Delivery Status Notifications (DSNs) and Message
233 Disposition Notifications (MDNs),
235 - MUST NOT be used on messages generated by automatic or periodic
236 processes, except for messages which are automatic responses to
237 other messages.
239PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
240 to the default Received: header definition.
456682f5 241
242PH/12 Added log selector acl_warn_skipped (default on).
244PH/13 After a successful wildlsearch lookup, discard the values of numeric
245 variables because (a) they are in the wrong storage pool and (b) even if
246 they were copied, it wouldn't work properly because of the caching.
248PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
249 checking when decoding. Apparently there are clients that generate
250 overlong encoded strings. Why am I not surprised?
252PH/15 If the first argument of "${if match_address" was not empty, but did not
253 contain an "@" character, Exim crashed. Now it writes a panic log message
254 and treats the condition as false.
256PH/16 In autoreply, treat an empty string for "once" the same as unset.
258PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
259 extension "envelope-auth". The code is finished and in agreement with
260 other implementations, but there is no documentation so far and in fact,
261 nobody wrote the draft yet. This extension is currently #undef'ed, thus
262 not changing the active code.
264 Print executed "if" and "elsif" statements when debugging is used. This
265 helps a great deal to understand what a filter does.
267 Document more things not specified clearly in RFC3028. I had all this
268 sorted out, when out of a sudden new issues came to my mind. Oops."
270PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
271 (Bugzilla #53).
273PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
274 canonical form (as documented). However, after a host name lookup from
275 the IP address, check_host() was doing a simple string comparison with
276 addresses acquired from the DNS when checking that the found name did
277 have the original IP as one of its addresses. Since any found IPv6
278 addresses are likely to be in abbreviated form, the comparison could
279 fail. Luckily, there already exists a function for doing the comparison
280 by converting both addresses to binary, so now that is used instead of
281 the text comparison.
283PH/20 There was another similar case to PH/19, when a complete host name was
284 given in a host list; looking up its IP address could give an abbreviated
285 form, whereas the current host's name might or might not be abbreviated.
286 The same fix has been applied.
5de37277 288
289Exim version 4.54
292PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
293 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
294 It now does.
296PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
297 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
299PH/03 Typo: missing ".o" in src/pcre/Makefile.
301PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
302 header line, restrict the check to what is listed in RFCs 2369 and 2929.
303 Also, for "Auto-Submitted", treat anything other than "no" as
304 non-personal, in accordance with RFC 3834. (Previously it treated
305 anything starting "auto-" as non-personal.)
307TF/01 The control=submission/name=... option had a problem with syntax
308 errors if the name included a slash character. The /name= option
309 now slurps the rest of the string, so it can include any characters
310 but it must come last in the list of options (after /sender_retain
311 or /domain=).
313PH/05 Some modifications to the interface to the fake nameserver for the new
314 testing suite.
3e46c1aa 316
9a799bc0 317
318Exim version 4.53
321TK/01 Added the "success_on_redirect" address verification option. See
322 NewStuff for rationale and an example.
324PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
326PH/02 Patch to exigrep to allow it to work on syslog lines.
328PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
329 fread() to skip over the body file's header line, because in Cygwin the
330 header line is locked and is inaccessible.
332PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
333 co-exist for some time) to make it clear that it is the Exim ID that is
334 referenced, not the Message-ID: header line.
336PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
337 string_format() function, because snprintf() does not exist on all
338 operating systems.
340PH/06 The use of forbid_filter_existstest now also locks out the use of the
341 ${stat: expansion item.
343PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
344 protocol synchronization error", to keep the pedants happy.
346PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
347 well as for IRIX systems, when gcc is being used. See the host.c source
348 file for comments.
350PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
352PH/10 Named domain lists were not working if used in a queue_smtp_domains
353 setting.
355PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
356 transport and to the smtp transport in LMTP mode.
358TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
360PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
361 run a filter in a subprocess. This could lead to confusion in subsequent
362 lookups in the parent process. There should also be a search_tidyup() at
363 the end of the subprocess.
365PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
366 only if the host matched helo_try_verify_hosts, which caused the
367 verification to occur when the EHLO/HELO command was issued. The ACL just
368 tested the remembered result. Now, if a previous verification attempt has
369 not happened, "verify = helo" does it there and then.
371JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
373TK/03 Fix log output including CR from clamd.
375PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
376 exist provoked a memory error which could cause a segfault.
378PH/15 Installed PCRE 6.2
380PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
382PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
383 of the problem. Specifically, suggested +O2 rather than +O1 for the
384 HP-UX compiler.
386PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
388PH/20 If a delivery was routed to a non-standard port by means of an SRV
389 record, the port was not correctly logged when the outgoing_port log
390 selector was set (it logged the transort's default port).
392PH/21 Added support for host-specific ports to manualroute, queryprogram,
393 fallback_hosts, and "hosts" in the smtp transport.
395PH/22 If the log selector "outgoing_port" is set, the port is now also given on
396 host errors such as "Connection refused".
398PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
399 authentication with radiusclient 0.4.9:
401 - Error returned from rc_read_config was caught wrongly
402 - Username/password not passed on to radius server due to wrong length.
404 The presumption is that some radiusclient API changes for 4.51/PH/17
405 were not taken care of correctly. The code is still untested by me (my
406 Linux distribution still has 0.3.2 of radiusclient), but it was
407 contributed by a Radius user.
409PH/24 When doing a callout, the value of $domain wasn't set correctly when
410 expanding the "port" option of the smtp transport.
412TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
413 while reading a MIME header. Thanks to Tom Hughes for a patch.
415PH/24 Include config.h inside local_scan.h so that configuration settings are
416 available.
418PH/25 Make $smtp_command_argument available after all SMTP commands. This means
419 that in an ACL for RCPT (for example), you can examine exactly what was
420 received.
422PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
423 commands, but it was not correctly comparing the address with the actual
424 client host address. Thus, it would show the EHLO address in Received:
425 header lines when this was not necessary.
427PH/27 Added the % operator to ${eval:}.
429PH/28 Exim tries to create and chdir to its spool directory when it starts;
430 it should be ignoring failures (because with -C, for example, it has lost
431 privilege). It wasn't ignoring creation failures other than "already
432 exists".
434PH/29 Added "crypteq" to the list of supported features that Exim outputs when
435 -bV or -d is used.
437PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
438 because an input line was too long, either on its own, or by virtue of
439 too many continuations, the temporary file was not being removed, and the
440 return code was incorrect.
aa2b5c79 441
442PH/31 Missing "BOOL" in function definition in filtertest.c.
444PH/32 Applied Sieve patches from the maintainer.
446TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
448PH/33 Added "verify = not_blind".
450PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
451 Local/Makefile (with some defaults set). These are used in built scripts
452 such as exicyclog, but they have never been used in the exim_install
453 script (though there are many overriding facilities there). I have
454 arranged that the exim_install script now takes note of these two
455 settings.
457PH/35 Installed configuration files for Dragonfly.
459PH/36 When a locally submitted message by a trusted user did not contain a
460 From: header, and the sender address was obtained from -f or from an SMTP
461 MAIL command, and the trusted user did not use -F to supply a sender
462 name, $originator_name was incorrectly used when constructing a From:
463 header. Furthermore, $originator_name was used for submission mode
464 messages from external hosts without From: headers in a similar way,
465 which is clearly wrong.
467PH/37 Added control=suppress_local_fixups.
469PH/38 When log_selector = +received_sender was set, and the addition of the
470 sender made the log line's construction buffer exactly full, or one byte
471 less than full, an overflow happened when the terminating "\n" was
472 subsequently added.
474PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
475 when the result of a list match is failure because a DNS lookup failed.
477PH/40 RM_COMMAND is now used in the building process.
479PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
480 the "build-* directories that it finds.
482PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
483 address in a domain literal was a prefix of an interface address.
485PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
486 when verifying a sender address, unless rewrite_headers is false.
488PH/44 Wrote a long comment about why errors_to addresses are verified as
489 recipients, not senders.
491TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
492 the ratelimit ACL was added.
494PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
496PH/46 Added extra information about PostgreSQL errors to the error string.
498PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
499 avoiding the need to install special zones in a real server. This is
500 backwards compatible; if it can't find the fake resolver, it drops back.
501 Thus, both old and new test suites can be run.
503TF/02 Added util/
505TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
506 clock is set back in time.
508TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
509 Candler <>.
511TF/05 The fix for PH/43 was not completely correct; widen_domains is always
512 OK for addresses that are the result of redirections.
514PH/48 A number of further additions for the benefit of the new test suite,
515 including a fake gethostbyname() that interfaces to the fake DNS resolver
516 (see PH/47 above).
518TF/06 The fix for widen_domains has also been applied to qualify_single and
519 search_parents which are the other dnslookup options that can cause
520 header rewrites.
522PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
523 type ("H").
525PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
527TF/07 Exim produced the error message "an SRV record indicated no SMTP
528 service" if it encountered an MX record with an empty target hostname.
529 The message is now "an MX or SRV record indicated no SMTP service".
531TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
532 if the DNS of the sending site is misconfigured. This is quite a
533 common situation. This change restores the behaviour of treating a
534 helo verification defer as a failure.
536PH/51 If self=fail was set on a router, the bounce message did not include the
537 actual error message.
bbe902f0 539
540Exim version 4.52
543TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
545PH/01 When a transport filter timed out in a pipe delivery, and the pipe
546 command itself ended in error, the underlying message about the transport
547 filter timeout was being overwritten with the pipe command error. Now the
548 underlying error message should be appended to the second error message.
550TK/01 Fix poll() being unavailable on Mac OSX 10.2.
552PH/02 Reduce the amount of output that "make" produces by default. Full output
553 can still be requested.
555PH/03 The warning log line about a condition test deferring for a "warn" verb
556 was being output only once per connection, rather than after each
557 occurrence (because it was using the same function as for successful
558 "warn" verbs). This seems wrong, so I have changed it.
560TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
561 it should not have, which might have caused a crash in the right
562 circumstances, but probably never did.
564PH/04 Installed a modified version of Tony Finch's patch to make submission
565 mode fix the return path as well as the Sender: header line, and to
566 add a /name= option so that you can make the user's friendly name appear
567 in the header line.
569TF/03 Added the control = fakedefer ACL modifier.
571TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
572 Mark Lowes for thorough testing.
870f6ba8 573
574TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
576TK/03 Merged latest SRS patch from Miles Wilton.
578PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
579 with the definition in sysexits.h (which is #included earlier).
580 Fortunately, Exim does not actually use EX_OK. The code used to try to
581 preserve the sysexits.h value, by assumimg that macro definitions were
582 scanned for macro replacements. I have been disabused of this notion,
583 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 584
585PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
586 in the smtp transport. When a block could not be written in a single
587 write() function, the timeout was being re-applied to each part-write.
588 This seems wrong - if the receiver was accepting one byte at a time it
589 would take for ever. The timeout is now adjusted when this happens. It
590 doesn't have to be particularly precise.
592TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
593 details. Thanks to Chris Webb <> for the patch!
595PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
596 without a domain if the check to <postmaster@domain> fails.
598SC/01 Eximstats: added -xls and the ability to specify output files
599 (patch written by Frank Heydlauf).
601SC/02 Eximstats: use FileHandles for outputing results.
603SC/03 Eximstats: allow any combination of xls, txt, and html output.
605SC/04 Eximstats: fixed display of large numbers with -nvr option
607SC/05 Eximstats: fixed merging of reports with empty tables.
609SC/06 Eximstats: added the -include_original_destination flag
611SC/07 Eximstats: removed tabs and trailing whitespace.
613TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
615TK/06 MBOX spool code: Add real "From " MBOX separator line
616 so the .eml file is really in mbox format (even though
617 most programs do not really care). Patch from Alex Miller.
619TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
620 The latter is generated from $received_to and is only set if the
621 message has one envelope recipient. SA can use these headers,
622 obviously out-of-the-box. Patch from Alex Miller.
624PH/08 The ${def test on a variable was returning false if the variable's
625 value was "0", contrary to what the specification has always said!
626 The result should be true unless the variable is empty.
628PH/09 The syntax error of a character other than { following "${if
629 def:variable_name" (after optional whitespace) was not being diagnosed.
630 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
631 accidental colon was present, for example, could give incorrect results.
633PH/10 Tidied the code in a number of places where the st_size field of a stat()
634 result is used (not including appendfile, where other changes are about
635 to be made).
637PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
638 This involved changing a lot of size variables from int to off_t. It
639 should work with maildirs and everything.
641TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
642 spamd dying while we are connected to it.
644TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
645 <>
647PH/12 Applied Alex Kiernan's patch for the API change for the error callback
648 function for BDB 4.3.
650PH/13 Changed auto_thaw such that it does not apply to bounce messages.
652PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
653 the sources for PCRE have been re-arranged and more files are now
654 involved.
656PH/15 The code I had for printing potentially long long variables in PH/11
657 above was not the best (it lost precision). The length of off_t variables
658 is now inspected at build time, and an appropriate printing format (%ld
659 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
660 to be "long long int" or "long int". This is needed for the internal
661 formatting function string_vformat().
b1c749bb 662
663PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
664 the configuration file to be ":syslog", then the script "guesses" where
665 the logs files are, rather than using the compiled in default. In our
666 case the guess is not the same as the compiled default, so the script
667 suddenly stopped working when I started to use syslog. The patch checks
668 to see if log_file_path is "". If so, it attempts to read it from exim
669 with no configuration file to get the compiled in version, before it
670 falls back to the previous guessing code."
672TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
673 implementing BATV in an Exim configuration. See NewStuff for the gory
674 details.
676PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
677 Makefile that are specific to HP-UX.
679PH/18 If the "use_postmaster" option was set for a recipient callout together
680 with the "random" option, the postmaster address was used as the MAIL
681 FROM address for the random test, but not for the subsequent recipient
682 test. It is now used for both.
684PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
685 patch removes a few documentation additions to RFC 3028, because the
686 latest draft now contains them. It adds the new en;ascii-case comparator
687 and a new error check for 8bit text in MIME parts. Comparator and
688 require names are now matched exactly. I enabled the subaddress
689 extension, but it is not well tested yet (read: it works for me)."
691PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
692 rework some of the code of TK/09 above to avoid the hardwired use of
693 "%lld" and "long long". Replaced the call to snprintf() with a call to
694 string_vformat().
696PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
697 records point to non-existent hosts", "retry timeout exceeded", and
698 "retry time not reached for any host after a long failure period".
ca02eafb 699
700PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
701 experimental DomainKeys support:
703 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
704 (2) On an error such as an illegally used "control", the wrong name for
705 the control was given.
707 These problems did NOT occur unless DomainKeys support was compiled.
709PH/23 Added daemon_startup_retries and daemon_startup_sleep.
711PH/24 Added ${if match_ip condition.
713PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
714 databases so that it will be absolutely obvious if a crash occurs in the
715 DB library. This is a regular occurrence (often caused by mis-matched
716 db.h files).
ff790e47 718PH/26 Insert a lot of missing (void) casts for functions such as chown(),
719 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
720 picked up on a user's system that detects such things. There doesn't seem
721 to be a gcc warning option for this - only an attribute that has to be
722 put on the function's prototype. It seems that in Fedora Core 4 they have
723 set this on a number of new functions. No doubt there will be more in due
724 course.
ff790e47 725
726PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
727 specify a transport. However, if an address that was verified by such a
728 router was the subject of a callout, Exim crashed because it tried to
729 read the rcpt_include_affixes from the non-existent transport. Now it
730 just assumes that the setting of that option is false. This bug was
731 introduced by 4.51/PH/31.
733PH/28 Changed -d+all to exclude +memory, because that information is very
734 rarely of interest, but it makes the output a lot bigger. People tend to
735 do -d+all out of habit.
737PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
738 code in os-type was giving problems when lives in lib64, like on
739 x86_64 Fedora Core.
741PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
742 aren't the modern standard, and it seems that some systems' include files
743 don't always have them. Exim was already checking for some of the newer
744 ones like T_AAAA, and defining it itself. I've added checks for all the
745 record types that Exim uses.
747PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
748 not automatically generating a new one, as it is supposed to. This
749 prevented TLS from working. If the file did exist, but contained invalid
750 data, a new version was generated, as expected. It was only the case of a
751 non-existent file that was broken.
753TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
754 with a change in libdomainkeys > 0.64.
756TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
757 from DNS. If the selector record carries the flag, it now has
758 precedence over the domain-wide flag.
760TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
762PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
763 the use of a port name that isn't defined in /etc/services) occurred, the
764 message was deferred as in a normal delivery, and thus remained on the
765 spool, instead of being failed because of the mua_wrapper setting. This
766 is now fixed, and I tidied up some of the mua_wrapper messages at the
767 same time.
769SC/08 Eximstats: whilst parsing the mainlog(s), store information about
770 the messages in a hash of arrays rather than using individual hashes.
771 This is a bit cleaner and results in dramatic memory savings, albeit
772 at a slight CPU cost.
774SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
775 as requested by Marc Sherman.
777SC/10 Eximstats: added histograms for user specified patterns as requested
778 by Marc Sherman.
780SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
782PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
783 fopen() in the content-scanning modules that did not already have it.
e7ad8a65 785
786Exim version 4.51
789TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
790 doc/experimental-spec.txt for details. (
2f079f46 792TK/02 Fix ACL "control" statement not being available in MIME ACL.
794TK/03 Fix ACL "regex" condition not being available in MIME ACL.
796PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
797 to test Sieve filters that use "vacation".
799PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
800 that changes the way the GnuTLS parameters are stored in the cache file.
801 The new format can be generated externally. For backward compatibility,
802 if the data in the cache doesn't make sense, Exim assumes it has read an
803 old-format file, and it generates new data and writes a new file. This
804 means that you can't go back to an older release without removing the
805 file.
807PH/03 A redirect router that has both "unseen" and "one_time" set does not
808 work if there are any delivery delays because "one_time" forces the
809 parent to be marked "delivered", so its unseen clone is never tried
810 again. For this reason, Exim now forbids the simultaneous setting of
811 these two options.
813PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
814 redirected to themselves ("homonym" addresses). Read the long ChangeLog
815 entry if you want to know the details. The fix, however, neglected to
816 consider the case when local delivery batching is involved. The test for
817 "previously delivered" was not happening when checking to see if an
818 address could be batched with a previous (undelivered) one; under
819 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 820 address.
822PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
823 in its include files, and this causes problems building Exim.
825PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
826 header_syntax) but Exim was just ignoring anything given after a slash.
827 In particular, this caused confusion with an attempt to use "verify =
828 reverse_host_lookup/defer_ok". An error is now given when options are
829 supplied for verify items that do not have them. (Maybe reverse_host_
830 lookup should have a defer_ok option, but that's a different point.)
832PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
833 defined by RFC 821) to 2048, because there were problems with some AUTH
834 commands, and RFC 1869 says the size should be increased for extended
835 SMTP commands that take arguments.
837PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
838 Finch).
840PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
841 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 842
843PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
844 an address' error message when a string expansion fails (syntax or
845 whatever). Otherwise the password may appear in the log. Following change
846 PH/42 below, there is no longer a chance of it appearing in a bounce
847 message.
49c2d5ea 848
849PH/11 Installed exipick version 20050225.0 from John Jetmore.
851PH/12 If the last host in a fallback_hosts list was multihomed, only the first
852 of its addresses was ever tried. (Bugzilla bug #2.)
854PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
855 the result incorrectly in the debug output. (It correctly added a newline
856 to what was transported.)
858TF/01 Added $received_time.
860PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
861 commented out examples of how to interface to a virus scanner and to
862 SpamAssassin. Also added commented examples of av_scanner and
863 spamd_address settings.
865PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
866 and controls are allowed in which ACLs. There were a couple of minor
867 errors. Some of the entries in the conditions table (which is a table of
868 where they are NOT allowed) were getting very unwieldy; rewrote them as a
869 negation of where the condition IS allowed.
871PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
873PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
874 header file does not have a version number, so I've had to invent a new
875 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
876 API. The code is untested by me (my Linux distribution still has 0.3.2 of
877 radiusclient), but it was contributed by a Radius user.
879PH/18 Installed Lars Mainka's patch for the support of CRL collections in
880 files or directories, for OpenSSL.
882PH/19 When an Exim process that is running as root has to create an Exim log
883 file, it does so in a subprocess that runs as exim:exim so as to get the
884 ownership right at creation (otherwise, other Exim processes might see
885 the file with the wrong ownership). There was no test for failure of this
886 fork() call, which would lead to the process getting stuck as it waited
887 for a non-existent subprocess. Forks do occasionally fail when resources
888 run out. I reviewed all the other calls to fork(); they all seem to check
889 for failure.
891PH/20 When checking for unexpected SMTP input at connect time (before writing
892 the banner), Exim was not dealing correctly with a non-positive return
893 from the read() function. If the client had disconnected by this time,
894 the result was a log entry for a synchronization error with an empty
895 string after "input=" when read() returned zero. If read() returned -1
896 (an event I could not check), uninitialized data bytes were printed.
897 There were reports of junk text (parts of files, etc) appearing after
898 "input=".
900PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
902PH/22 Added support for macro redefinition, and (re)definition in between
903 driver and ACL definitions.
905PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
906 forgetting to use the resulting value; it was using the unexpanded value.
908PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
909 hadn't been configured. The fix is from Juergen Kreileder, who
910 understands it better than I do:
912 "Here's what I see happening with three configured cyrus_sasl
913 authenticators configured (plain, login, cram-md5):
915 On startup auth_cyrus_sasl_init() gets called for each of these.
916 This means three calls to sasl_listmech() without a specified mech_list.
917 => SASL tests which mechs of all available mechs actually work
918 => three warnings about OTP not working
919 => the returned list contains: plain, login, cram-md5, digest-md5, ...
921 With the patch, sasl_listmech() also gets called three times. But now
922 SASL's mech_list option is set to the server_mech specified in the the
923 authenticator. Or in other words, the answer from sasl_listmech()
924 gets limited to just the mech you're testing for (which is different
925 for each call.)
926 => the return list contains just 'plain' or 'login', 'cram-md5' or
927 nothing depending on the value of ob->server_mech.
929 I've just tested the patch: Authentication still works fine,
930 unavailable mechs specified in the exim configuration are still
931 caught, and the auth.log warnings about OTP are gone."
933PH/25 When debugging is enabled, the contents of the command line are added
934 to the debugging output, even when log_selector=+arguments is not
935 specified.
937PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
938 answer is "GNU", and only if the return is "GNU/something" is the answer
939 "Linux".
941PH/27 $acl_verify_message is now set immediately after the failure of a
942 verification in an ACL, and so is available in subsequent modifiers. In
943 particular, the message can be preserved by coding like this:
945 warn !verify = sender
946 set acl_m0 = $acl_verify_message
948 Previously, $acl_verify_message was set only while expanding "message"
949 and "log_message" when a very denied access.
951PH/28 Modified OS/os.c-Linux with
953 -#ifndef OS_LOAD_AVERAGE
954 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
956 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
957 nomenclature these days.)
959PH/29 Installed patch from the Sieve maintainer that adds the options
960 sieve_useraddress and sieve_subaddress to the redirect router.
962PH/30 In these circumstances:
963 . Two addresses routed to the same list of hosts;
964 . First host does not offer TLS;
965 . First host accepts first address;
966 . First host gives temporary error to second address;
967 . Second host offers TLS and a TLS session is established;
968 . Second host accepts second address.
969 Exim incorrectly logged both deliveries with the TLS parameters (cipher
970 and peerdn, if requested) that were in fact used only for the second
971 address.
7e8bec7a 972
973PH/31 When doing a callout as part of verifying an address, Exim was not paying
974 attention to any local part prefix or suffix that was matched by the
975 router that accepted the address. It now behaves in the same way as it
976 does for delivery: the affixes are removed from the local part unless
977 rcpt_include_affixes is set on the transport.
979PH/32 Add the sender address, as F=<...>, to the log line when logging a
980 timeout during the DATA phase of an incoming message.
982PH/33 Sieve envelope tests were broken for match types other than :is. I have
983 applied a patch sanctioned by the Sieve maintainer.
c688b954 984
985PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
986 the uid or gid is negative. A case of a negative gid caused this to be
987 noticed. The fix allows for either to be negative.
989PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
990 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
991 overlooked.
993PH/36 The change PH/12 above was broken. Fixed it.
995PH/37 Exim used to check for duplicate addresses in the middle of routing, on
996 the grounds that routing the same address twice would always produce the
997 same answer. This might have been true once, but it is certainly no
998 longer true now. Routing a child address may depend on the previous
999 routing that produced that child. Some complicated redirection strategies
1000 went wrong when messages had multiple recipients, and made Exim's
1001 behaviour dependent on the order in which the addresses were given.
1003 I have moved the duplicate checking until after the routing is complete.
1004 Exim scans the addresses that are assigned to local and remote
1005 transports, and removes any duplicates. This means that more work will be
1006 done, as duplicates will always all be routed, but duplicates are
1007 presumably rare, so I don't expect this is of any significance.
1009 For deliveries to pipes, files, and autoreplies, the duplicate checking
1010 still happens during the routing process, since they are not going to be
1011 routed further.
1013PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1014 It corrects a timeout issue with spamd. This is Ian's comment: "The
1015 background is that sometimes spamd either never reads data from a
1016 connection it has accepted, or it never writes response data. The exiscan
1017 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1018 blindly assumes that writes won't block so it may never time out."
1020PH/39 Allow G after quota size as well as K and M.
1022PH/40 The value set for $authenticated_id in an authenticator may not contain
1023 binary zeroes or newlines because the value is written to log lines and
1024 to spool files. There was no check on this. Now the value is run through
1025 the string_printing() function so that such characters are converted to
1026 printable escape sequences.
1028PH/41 $message_linecount is a new variable that contains the total number of
1029 lines in the message. Compare $body_linecount, which is the count for the
1030 body only.
1032PH/42 Exim no longer gives details of delivery errors for specific addresses in
1033 bounce and delay warning messages, except in certain special cases, which
1034 are as follows:
1036 (a) An SMTP error message from a remote host;
1037 (b) A message specified in a :fail: redirection;
1038 (c) A message specified in a "fail" command in a system filter;
1039 (d) A message specified in a FAIL return from the queryprogram router;
1040 (e) A message specified by the cannot_route_message router option.
1042 In these cases only, Exim does include the error details in bounce and
1043 warning messages. There are also a few cases where bland messages such
1044 as "unrouteable address" or "local delivery error" are given.
1046PH/43 $value is now also set for the "else" part of a ${run expansion.
1048PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1049 being worked on, but at least Exim now implements the latest version to
1050 play with."
1052PH/45 In a pipe transport, although a timeout while waiting for the pipe
1053 process to complete was treated as a delivery failure, a timeout while
1054 writing the message to the pipe was logged, but erroneously treated as a
1055 successful delivery. Such timeouts include transport filter timeouts. For
1056 consistency with the overall process timeout, these timeouts are now
1057 treated as errors, giving rise to delivery failures by default. However,
1058 there is now a new Boolean option for the pipe transport called
1059 timeout_defer, which, if set TRUE, converts the failures into defers for
1060 both kinds of timeout. A transport filter timeout is now identified in
1061 the log output.
1063PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1064 systems where "make" and "gmake" are different, calling "gmake" at top
1065 level broke things. I've arranged for the value of $(MAKE) to be passed
1066 from the Makefile to this script so that it can call the same version of
1067 "make".
7982096b 1069
1070A note about Exim versions 4.44 and 4.50
1073Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1074changes of various kinds. As a consequence, a big documentation update was
1075needed. This delayed the release for rather longer than seemed good, especially
1076in the light of a couple of (minor) security issues. Therefore, the changes
1077that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1078release. So 4.44 and 4.50 are in effect two different branches that both start
1079from 4.43.
1081I have left the 4.50 change log unchanged; it contains all the changes since
10824.43. The change log for 4.44 is below; many of its items are identical to
1083those for 4.50. This seems to be the most sensible way to preserve the
1084historical information.
f7b63901 1087Exim version 4.50
1090 1. Minor wording change to the doc/README.SIEVE file.
139059f6 1092 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1093 computation of the current number of files was incorrect.
495ae4b0 1094
1095 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1096 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1097 place.
1099 4. Give more explanation in the error message when the command for a transport
1100 filter fails to execute.
1102 5. There are several places where Exim runs a non-Exim command in a
1103 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1104 was being done only for the command run by the queryprogram router. It is
1105 now done for all such subprocesses. The other cases are: ${run, transport
1106 filters, and the commands run by the lmtp and pipe transports.
1108 6. Added CONFIGURE_GROUP build-time option.
1110 7. Some older OS have a limit of 256 on the maximum number of file
1111 descriptors. Exim was using setrlimit() to set 1000 as a large value
1112 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1113 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1114
1115 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1116 was an oversight, and furthermore, ever since the addition of extra
1117 controls (e.g. 4.43/32), the checks on when to allow different forms of
1118 "control" were broken. There should now be diagnostics for all cases when a
1119 control that does not make sense is encountered.
1121 9. Added the /retain_sender option to "control=submission".
112310. $recipients is now available in the predata ACL (oversight).
112511. Tidy the search cache before the fork to do a delivery from a message
1126 received from the command line. Otherwise the child will trigger a lookup
1127 failure and thereby defer the delivery if it tries to use (for example) a
1128 cached ldap connection that the parent has called unbind on.
113012. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1131 of $address_data from the recipient verification was clobbered by the
1132 sender verification.
113413. The value of address_data from a sender verification is now available in
1135 $sender_address_data in subsequent conditions in the ACL statement.
113714. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
113915. Added a new option "connect=<time>" to callout options, to set a different
1140 connection timeout.
114216. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1143 was its contents. (It was OK if the option was not defined at all.)
114517. A "Completed" log line is now written for messages that are removed from
1146 the spool by the -Mrm option.
114818. New variables $sender_verify_failure and $recipient_verify_failure contain
1149 information about exactly what failed.
115119. Added -dd to debug only the daemon process.
115320. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1154 handles timeouts, both on the server side and network timeouts. Renamed the
1155 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
115721. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1158 It is now set to "smtps".
116022. $host_address is now set to the target address during the checking of
1161 ignore_target_hosts.
116323. When checking ignore_target_hosts for an ipliteral router, no host name was
1164 being passed; this would have caused $sender_host_name to have been used if
1165 matching the list had actually called for a host name (not very likely,
1166 since this list is usually IP addresses). A host name is now passed as
1167 "[x.x.x.x]".
116924. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1170 code that specifies a non-restarting handler (typically sigaction() in
1171 modern systems) in an attempt to fix a rare and obscure crash bug.
117325. Narrowed the window for a race in the daemon that could cause it to ignore
1174 SIGCHLD signals. This is not a major problem, because they are used only to
1175 wake it up if nothing else does.
117726. A malformed maildirsize file could cause Exim to calculate negative values
1178 for the mailbox size or file count. Odd effects could occur as a result.
1179 The maildirsize information is now recalculated if the size or filecount
1180 end up negative.
118227. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1183 support for a long time. Removed HAVE_SYS_VFS_H.
118528. Installed the latest version of exipick from John Jetmore.
118729. In an address list, if the pattern was not a regular expression, an empty
1188 subject address (from a bounce message) matched only if the pattern was an
1189 empty string. Non-empty patterns were not even tested. This was the wrong
1190 because it is perfectly reasonable to use an empty address as part of a
1191 database query. An empty address is now tested by patterns that are
1192 lookups. However, all the other forms of pattern expect the subject to
1193 contain a local part and a domain, and therefore, for them, an empty
1194 address still always fails if the pattern is not itself empty.
119630. Exim went into a mad DNS loop when attempting to do a callout where the
1197 host was specified on an smtp transport, and looking it up yielded more
1198 than one IP address.
120031. Re-factored the code for checking spool and log partition space into a
1201 function that finds that data and another that does the check. The former
1202 is then used to implement four new variables: $spool_space, $log_space,
1203 $spool_inodes, and $log_inodes.
120532. The RFC2047 encoding function was originally intended for short strings
1206 such as real names; it was not keeping to the 75-character limit for
1207 encoded words that the RFC imposes. It now respects the limit, and
1208 generates multiple encoded words if necessary. To be on the safe side, I
1209 have increased the buffer size for the ${rfc2047: expansion operator from
1210 1024 to 2048 bytes.
121233. It is now permitted to omit both strings after an "if" condition; if the
1213 condition is true, the result is "true". As before, when the second string
1214 is omitted, a false condition yields an empty string. This makes it less
1215 cumbersome to write custom ACL and router conditions.
121734. Failure to deliver a bounce message always caused it to be frozen, even if
1218 there was an errors_to setting on the router. The errors_to setting is now
1219 respected.
122135. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1222 canonical form (fully expanded) before being placed in
1223 $sender_host_address.
122536. The table in the code that translates DNS record types into text (T_A to
1226 "A" for instance) was missing entries for NS and CNAME. It is just possible
1227 that this could have caused confusion if both these types were looked up
1228 for the same domain, because the text type is used as part of Exim's
1229 per-process caching. But the chance of anyone hitting this buglet seems
1230 very small.
123237. The dnsdb lookup has been extended in a number of ways.
1234 (1) There is a new type, "zns", which walks up the domain tree until it
1235 finds some nameserver records. It should be used with care.
1237 (2) There is a new type, "mxh", which is like "mx" except that it returns
1238 just the host names, not the priorities.
1240 (3) It is now possible to give a list of domains (or IP addresses) to be
1241 looked up. The behaviour when one of the lookups defers can be
1242 controlled by a keyword.
7bb56e1f 1243
ea3bc19b 1244 (4) It is now possible to specify the separator character for use when
7bb56e1f 1245 multiple records are returned.
33397d19 1246
124738. The dnslists ACL condition has been extended: it is now possible to supply
1248 a list of IP addresses and/or domains to be looked up in a particular DNS
1249 domain.
125139. Added log_selector=+queue_time_overall.
125340. When running the queue in the test harness, wait just a tad after forking a
1254 delivery process, to get repeatability of debugging output.
125641. Include certificate and key file names in error message when GnuTLS fails
1257 to set them up, because the GnuTLS error message doesn't include the name
1258 of the failing file when there is a problem reading it.
126042. Allow both -bf and -bF in the same test run.
126243. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
126444. The "Exiscan patch" is now merged into the mainline Exim source.
126645. Sometimes the final signoff response after QUIT could fail to get
1267 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1268 < 0 before doing a fflush(). This bug looks as though it goes back to the
1269 introduction of TLS in release 3.20, but "sometimes" must have been rare
1270 because the tests only now provoked it.
127246. Reset the locale to "C" after calling embedded Perl, in case it was changed
1273 (this can affect the format of dates).
127547. exim_tidydb, when checking for the continued existence of a message for
1276 which it has found a message-specific retry record, was not finding
1277 messages that were in split spool directories. Consequently, it was
1278 deleting retry records that should have stayed in existence.
128048. Steve fixed some bugs in eximstats.
128249. The SPA authentication driver was not abandoning authentication and moving
1283 on to the next authenticator when an expansion was forced to fail,
1284 contradicting the general specification for all authenticators. Instead it
1285 was generating a temporary error. It now behaves as specified.
128750. The default ordering of permitted cipher suites for GnuTLS was pessimal
1288 (the order specifies the preference for clients). The order is now AES256,
1289 AES128, 3DES, ARCFOUR128.
129151. Small patch to Sieve code - explicitly set From: when generating an
1292 autoreply.
129452. Exim crashed if a remote delivery caused a very long error message to be
1295 recorded - for instance if somebody sent an entire SpamAssassin report back
1296 as a large number of 550 error lines. This bug was coincidentally fixed by
1297 increasing the size of one of Exim's internal buffers (big_buffer) that
1298 happened as part of the Exiscan merge. However, to be on the safe side, I
1299 have made the code more robust (and fixed the comments that describe what
1300 is going on).
130253. Now that there can be additional text after "Completed" in log lines (if
1303 the queue_time_overall log selector is set), a one-byte patch to exigrep
1304 was needed to allow it to recognize "Completed" as not the last thing in
1305 the line.
130754. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1308 patch that reportedly fixes this has been added. I am not expert enough to
1309 create a test for it. This is what the patch creator wrote:
1311 "I found a little strange behaviour of ldap code when working with
1312 Windows 2003 AD Domain, where users was placed in more than one
1313 Organization Units. When I tried to give exim partial DN, the exit code
1314 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1315 But simultaneously result of request was absolutely normal ldap result,
1316 so I produce this patch..."
1318 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1319 REFERENCE, so I have modified the code to exclude the patch when that macro
1320 is not defined.
132255. Some experimental protocols are using DNS PTR records for new purposes. The
1323 keys for these records are domain names, not reversed IP addresses. The
1324 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1325 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1326 CAN-2005-0021
7102e136 1327
132856. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
133057. Double the size of the debug message buffer (to 2048) so that more of very
1331 long debug lines gets shown.
133358. The exicyclog utility now does better if the number of log files to keep
1334 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
133659. Two changes related to the smtp_active_hostname option:
1338 (1) $smtp_active_hostname is now available as a variable.
1339 (2) The default for smtp_banner uses $smtp_active_hostname instead
1340 of $primary_hostname.
134260. The host_aton() function is supposed to be passed a string that is known
1343 to be a valid IP address. However, in the case of IPv6 addresses, it was
1344 not checking this. This is a hostage to fortune. Exim now panics and dies
1345 if the condition is not met. A case was found where this could be provoked
1346 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1347 components; fortuitously, this particular loophole had already been fixed
1348 by change 4.50/55 above.
1350 If there are any other similar loopholes, the new check in host_aton()
1351 itself should stop them being exploited. The report I received stated that
1352 data on the command line could provoke the exploit when Exim was running as
1353 exim, but did not say which command line option was involved. All I could
1354 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1355 running as the user.
ea3a6f44 1356 CAN-2005-0021
135861. There was a buffer overflow vulnerability in the SPA authentication code
1359 (which came originally from the Samba project). I have added a test to the
1360 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1361 CAN-2005-0022
b975ba52 1362
136362. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1364 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
136663. The daemon start-up calls getloadavg() while still root for those OS that
1367 need the first call to be done as root, but it missed one case: when
1368 deliver_queue_load_max is set with deliver_drop_privilege. This is
1369 necessary for the benefit of the queue runner, because there is no re-exec
1370 when deliver_drop_privilege is set.
137264. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1373 This has been fixed.
137565. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1376 was in use, was not putting the data itself into the right store pool;
1377 consequently, it could be overwritten for a subsequent message in the same
1378 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1379 the caching.)
138166. Added hosts_max_try_hardlimit to the smtp transport, default 50.
138367. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1384 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1385 the function were treating the return as a boolean value, which happened to
1386 work because 0=false and not-0=true, but is not correct code.
138868. The host_aton() function was not handling scoped IPv6 addresses (those
1389 with, for example, "%eth0" on the end) correctly.
139169. Fixed some compiler warnings in acl.c for the bitmaps specified with
1392 negated items (that is, ~something) in unsigned ints. Some compilers
1393 apparently mutter when there is no cast.
139570. If an address verification called from an ACL failed, and did not produce a
1396 user-specific message (i.e. there was only a "system" message), nothing was
1397 put in $acl_verify_message. In this situation, it now puts the system
1398 message there.
140071. Change 4.23/11 added synchronization checking at the start of an SMTP
1401 session; change 4.31/43 added the unwanted input to the log line - except
1402 that it did not do this in the start of session case. It now does.
140472. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1405 This is wrong and can cause the other end to generate a synchronization
1406 error if it is another Exim or anything else that does the synchronization
1407 check. A QUIT command is no longer sent after a timeout.
140973. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1410 during host lookups.
141274. The defer_ok option of callout verification was not working if it was used
1413 when verifying addresses in header lines, that is, for this case:
1415 verify = header_sender/callout=defer_ok
141775. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1418 those file descriptors could be used for SMTP connections. If anything
1419 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1420 could be sent to the SMTP client, causing chaos. The daemon now opens
1421 stdin, stdout, and stderr to /dev/null when it puts itself into the
1422 background.
142476. Arrange for output from Perl's "warn" command to be written to Exim's main
1425 log by default. The user can override this with suitable Perl magic.
142777. The use of log_message on a "discard" ACL verb, which is supposed to add to
1428 the log message when discard triggers, was not working for the DATA ACL or
1429 for the non-SMTP ACL.
143178. Error message wording change in sieve.c.
143379. If smtp_accept_max_per_host was set, the number of connections could be
1434 restricted to fewer than expected, because the daemon was trying to set up
1435 a new connection before checking whether the processes handling previous
1436 connections had finished. The check for completed processes is now done
1437 earlier. On busy systems, this bug wouldn't be noticed because something
1438 else would have woken the daemon, and it would have reaped the completed
1439 process earlier.
144180. If a message was submitted locally by a user whose login name contained one
1442 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1443 It caused a spool format error. I have fixed the spool reading code. A
1444 related problem was that the "from" clause in the Received: line became
1445 illegal because of the space(s). It is now covered by ${quote_local_part.
144781. Included the latest eximstats from Steve (adds average sizes to HTML Top
1448 tables).
145082. Updated OS/Makefile-AIX as per message from Mike Meredith.
145283. Patch from Sieve maintainer to fix unterminated string problem in
1453 "vacation" handling.
145584. Some minor changes to the Linux configuration files to help with other
1456 OS variants using glibc.
145885. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 1460
1462See the note above about the 4.44 and 4.50 releases.
1466Exim version 4.44
1469 1. Change 4.43/35 introduced a bug that caused file counts to be
1470 incorrectly computed when quota_filecount was set in an appendfile
1471 transport
1473 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1474 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1475 place.
1477 3. Give more explanation in the error message when the command for a transport
1478 filter fails to execute.
1480 4. There are several places where Exim runs a non-Exim command in a
1481 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1482 was being done only for the command run by the queryprogram router. It is
1483 now done for all such subprocesses. The other cases are: ${run, transport
1484 filters, and the commands run by the lmtp and pipe transports.
1486 5. Some older OS have a limit of 256 on the maximum number of file
1487 descriptors. Exim was using setrlimit() to set 1000 as a large value
1488 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1489 systems. I've change it so that if it can't get 1000, it tries for 256.
1491 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1492 was an oversight, and furthermore, ever since the addition of extra
1493 controls (e.g. 4.43/32), the checks on when to allow different forms of
1494 "control" were broken. There should now be diagnostics for all cases when a
1495 control that does not make sense is encountered.
1497 7. $recipients is now available in the predata ACL (oversight).
1499 8. Tidy the search cache before the fork to do a delivery from a message
1500 received from the command line. Otherwise the child will trigger a lookup
1501 failure and thereby defer the delivery if it tries to use (for example) a
1502 cached ldap connection that the parent has called unbind on.
1504 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1505 of $address_data from the recipient verification was clobbered by the
1506 sender verification.
150810. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1509 was its contents. (It was OK if the option was not defined at all.)
151111. A "Completed" log line is now written for messages that are removed from
1512 the spool by the -Mrm option.
151412. $host_address is now set to the target address during the checking of
1515 ignore_target_hosts.
151713. When checking ignore_target_hosts for an ipliteral router, no host name was
1518 being passed; this would have caused $sender_host_name to have been used if
1519 matching the list had actually called for a host name (not very likely,
1520 since this list is usually IP addresses). A host name is now passed as
1521 "[x.x.x.x]".
152314. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1524 code that specifies a non-restarting handler (typically sigaction() in
1525 modern systems) in an attempt to fix a rare and obscure crash bug.
152715. Narrowed the window for a race in the daemon that could cause it to ignore
1528 SIGCHLD signals. This is not a major problem, because they are used only to
1529 wake it up if nothing else does.
153116. A malformed maildirsize file could cause Exim to calculate negative values
1532 for the mailbox size or file count. Odd effects could occur as a result.
1533 The maildirsize information is now recalculated if the size or filecount
1534 end up negative.
153617. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1537 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 153918. Updated exipick to current release from John Jetmore.
154119. Allow an empty sender to be matched against a lookup in an address list.
1542 Previously the only cases considered were a regular expression, or an
1543 empty pattern.
154520. Exim went into a mad DNS lookup loop when doing a callout where the
1546 host was specified on the transport, if the DNS lookup yielded more than
1547 one IP address.
154921. The RFC2047 encoding function was originally intended for short strings
1550 such as real names; it was not keeping to the 75-character limit for
1551 encoded words that the RFC imposes. It now respects the limit, and
1552 generates multiple encoded words if necessary. To be on the safe side, I
1553 have increased the buffer size for the ${rfc2047: expansion operator from
1554 1024 to 2048 bytes.
bbe902f0 1555
155622. Failure to deliver a bounce message always caused it to be frozen, even if
1557 there was an errors_to setting on the router. The errors_to setting is now
1558 respected.
156023. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1561 canonical form (fully expanded) before being placed in
1562 $sender_host_address.
156424. Updated eximstats to version 1.33
156625. Include certificate and key file names in error message when GnuTLS fails
1567 to set them up, because the GnuTLS error message doesn't include the name
1568 of the failing file when there is a problem reading it.
157026. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1571 As per change 25.
bbe902f0 1572
157327. Reset the locale to "C" after calling embedded Perl, in case it was changed
1574 (this can affect the format of dates).
bbe902f0 1575
157628. exim_tidydb, when checking for the continued existence of a message for
1577 which it has found a message-specific retry record, was not finding
1578 messages that were in split spool directories. Consequently, it was
1579 deleting retry records that should have stayed in existence.
158129. eximstats updated to version 1.35
1582 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1583 1.35 - bugfix such that pie charts by volume are generated correctly
158530. The SPA authentication driver was not abandoning authentication and moving
1586 on to the next authenticator when an expansion was forced to fail,
1587 contradicting the general specification for all authenticators. Instead it
1588 was generating a temporary error. It now behaves as specified.
bbe902f0 1589
159031. The default ordering of permitted cipher suites for GnuTLS was pessimal
1591 (the order specifies the preference for clients). The order is now AES256,
1592 AES128, 3DES, ARCFOUR128.
bbe902f0 1593
159431. Small patch to Sieve code - explicitly set From: when generating an
1595 autoreply.
bbe902f0 1596
159732. Exim crashed if a remote delivery caused a very long error message to be
1598 recorded - for instance if somebody sent an entire SpamAssassin report back
1599 as a large number of 550 error lines. This bug was coincidentally fixed by
1600 increasing the size of one of Exim's internal buffers (big_buffer) that
1601 happened as part of the Exiscan merge. However, to be on the safe side, I
1602 have made the code more robust (and fixed the comments that describe what
1603 is going on).
bbe902f0 1604
160533. Some experimental protocols are using DNS PTR records for new purposes. The
1606 keys for these records are domain names, not reversed IP addresses. The
1607 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1608 leaves it alone. Component reversal etc. now happens only for IP addresses.
1609 CAN-2005-0021
161134. The host_aton() function is supposed to be passed a string that is known
1612 to be a valid IP address. However, in the case of IPv6 addresses, it was
1613 not checking this. This is a hostage to fortune. Exim now panics and dies
1614 if the condition is not met. A case was found where this could be provoked
1615 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1616 components; fortuitously, this particular loophole had already been fixed
1617 by change 4.50/55 or 4.44/33 above.
1619 If there are any other similar loopholes, the new check in host_aton()
1620 itself should stop them being exploited. The report I received stated that
1621 data on the command line could provoke the exploit when Exim was running as
1622 exim, but did not say which command line option was involved. All I could
1623 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1624 running as the user.
1625 CAN-2005-0021
162735. There was a buffer overflow vulnerability in the SPA authentication code
1628 (which came originally from the Samba project). I have added a test to the
1629 spa_base64_to_bits() function which I hope fixes it.
1630 CAN-2005-0022
163236. The daemon start-up calls getloadavg() while still root for those OS that
1633 need the first call to be done as root, but it missed one case: when
1634 deliver_queue_load_max is set with deliver_drop_privilege. This is
1635 necessary for the benefit of the queue runner, because there is no re-exec
1636 when deliver_drop_privilege is set.
bbe902f0 1637
163837. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1639 was in use, was not putting the data itself into the right store pool;
1640 consequently, it could be overwritten for a subsequent message in the same
1641 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1642 the caching.)
bbe902f0 1643
164438. Sometimes the final signoff response after QUIT could fail to get
1645 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1646 < 0 before doing a fflush(). This bug looks as though it goes back to the
1647 introduction of TLS in release 3.20, but "sometimes" must have been rare
1648 because the tests only now provoked it.
1651Exim version 4.43
1654 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1655 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1656 Now it returns an integer. A number of calls were still expecting a T/F
1657 return. Fortuitously, in all cases, the tests worked in OK situations,
1658 which is the norm. However, things would have gone wrong on any write
1659 failures on the smtp file descriptor. This function is used when sending
1660 messages over SMTP and also when doing verify callouts.
1662 2. When Exim is called to do synchronous delivery of a locally submitted
1663 message (the -odf or -odi options), it no longer closes stderr before doing
1664 the delivery.
1666 3. Implemented the mua_wrapper option.
1668 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1670 5. Implemented the functions header_remove(), header_testname(),
1671 header_add_at_position(), and receive_remove_recipient(), and exported them
1672 to local_scan().
1674 6. If an ACL "warn" statement specified the addition of headers, Exim already
1675 inserted X-ACL-Warn: at the start if there was no header name. However, it
1676 was not making this test for the second and subsequent header lines if
1677 there were newlines in the string. This meant that an invalid header could
1678 be inserted if Exim was badly configured.
1680 7. Allow an ACL "warn" statement to add header lines at the start or after all
1681 the Received: headers, as well as at the end.
1683 8. Added the rcpt_4xx retry error code.
1685 9. Added postmaster_mailfrom=xxx to callout verification option.
168710. Added mailfrom=xxxx to the callout verification option, for verify=
1688 header_sender only.
169011. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1691 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
169312. Inserted some casts to stop certain compilers warning when using pointer
1694 differences as field lengths or precisions in printf-type calls (mostly
1695 affecting debugging statements).
169713. Added optional readline() support for -be (dynamically loaded).
169914. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1700 same clock tick as a message's arrival, so that its received time was the
1701 same as the "first fail" time on the retry record, and that message
1702 remained on the queue past the ultimate address timeout, every queue runner
1703 would try a delivery (because it was past the ultimate address timeout) but
1704 after another failure, the ultimate address timeout, which should have then
1705 bounced the address, did not kick in. This was a "< instead of <=" error;
1706 in most cases the first failure would have been in the next clock tick
1707 after the received time, and all would be well.
170915. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1710 being recognized when the domain list was tested by the match_domain
1711 condition in an expansion string.
171316. Added the ${str2b64: operator.
171517. Exim was always calling setrlimit() to set a large limit for the number of
1716 processes, without checking whether the existing limit was already
1717 adequate. (It did check for the limit on file descriptors.) Furthermore,
1718 errors from getrlimit() and setrlimit() were being ignored. Now they are
1719 logged to the main and panic logs, but Exim does carry on, to try to do its
1720 job under whatever limits there are.
172218. Imported PCRE 5.0.
172419. Trivial typo in log message " temporarily refused connection" (the leading
1725 space).
172720. If the log selector return_path_on_delivery was set and an address was
1728 redirected to /dev/null, the delivery process crashed because it assumed
1729 that a return path would always be set for a "successful" delivery. In this
1730 case, the whole delivery is bypassed as an optimization, and therefore no
1731 return path is set.
173321. Internal re-arrangement: the function for sending a challenge and reading
1734 a response while authentication was assuming a zero-terminated challenge
1735 string. It's now changed to take a pointer and a length, to allow for
1736 binary data in such strings.
173822. Added the cyrus_sasl authenticator (code supplied by MBM).
174023. Exim was not respecting finduser_retries when seeking the login of the
1741 uid under which it was called; it was always trying 10 times. (The default
1742 setting of finduser_retries is zero.) Also, it was sleeping after the final
1743 failure, which is pointless.
174524. Implemented tls_on_connect_ports.
174725. Implemented acl_smtp_predata.
174926. If the domain in control=submission is set empty, Exim assumes that the
1750 authenticated id is a complete email address when it generates From: or
1751 Sender: header lines.
175327. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1754 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1755 chown and chgrp in /bin and hostname in /usr/bin.
175728. Exim was keeping the "process log" file open after each use, just as it
1758 does for the main log. This opens the possibility of it remaining open for
1759 long periods when the USR1 signal hits a daemon. Occasional processlog
1760 errors were reported, that could have been caused by this. Anyway, it seems
1761 much more sensible not to leave this file open at all, so that is what now
1762 happens.
176429. The long-running daemon process does not normally write to the log once it
1765 has entered its main loop, and it closes the log before doing so. This is
1766 so that log files can straightforwardly be renamed and moved. However,
1767 there are a couple of unusual error situations where the daemon does write
1768 log entries, and I had neglected to close the log afterwards.
177030. The text of an SMTP error response that was received during a remote
1771 delivery was being truncated at 512 bytes. This is too short for some of
1772 the long messages that one sometimes sees. I've increased the limit to
1773 1024.
177531. It is now possible to make retry rules that apply only when a message has a
1776 specific sender, in particular, an empty sender.
177832. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1779 it possible to be selective about when SMTP synchronization is enforced.
178133. Added "control = caseful_local_part" and "control = "caselower_local_part".
178332. Implemented hosts_connection_nolog.
178533. Added an ACL for QUIT.
178734. Setting "delay_warning=" to disable warnings was not working; it gave a
1788 syntax error.
179035. Added mailbox_size and mailbox_filecount to appendfile.
179236. Added control = no_multiline_responses to ACLs.
179437. There was a bug in the logic of the code that waits for the clock to tick
1795 in the case where the clock went backwards by a substantial amount such
1796 that the microsecond fraction of "now" was more than the microsecond
1797 fraction of "then" (but the whole seconds number was less).
179938. Added support for the libradius Radius client library this is found on
1800 FreeBSD (previously only the radiusclient library was supported).
1803Exim version 4.42
1806 1. When certain lookups returned multiple values in the form name=value, the
1807 quoting of the values was not always being done properly. Specifically:
1808 (a) If the value started with a double quote, but contained no whitespace,
1809 it was not quoted.
1810 (b) If the value contained whitespace other than a space character (i.e.
1811 tabs or newlines or carriage returns) it was not quoted.
1812 This fix has been applied to the mysql and pgsql lookups by writing a
1813 separate quoting function and calling it from the lookup code. The fix
1814 should probably also be applied to nisplus, ibase and oracle lookups, but
1815 since I cannot test any of those, I have not disturbed their existing code.
1817 2. A hit in the callout cache for a specific address caused a log line with no
1818 reason for rejecting RCPT. Now it says "Previous (cached) callout
1819 verification failure".
1821 3. There was an off-by-one bug in the queryprogram router. An over-long
1822 return line was truncated at 256 instead of 255 characters, thereby
1823 overflowing its buffer with the terminating zero. As well as fixing this, I
1824 have increased the buffer size to 1024 (and made a note to document this).
1826 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1827 when Exim is waiting for an SMTP response from a remote server, Exim
1828 restarts its select() call on the socket, thereby resetting its timeout.
1829 This is not a problem when such interrupts are rare. Somebody set up a cron
1830 job to run exiwhat every 2 minutes, which is less than the normal select()
1831 timeout (5 or 10 minutes). This meant that the select() timeout never
1832 kicked in because it was always reset. I have fixed this by comparing the
1833 time when an interrupt arrives with the time at the start of the first call
1834 to select(). If more time than the timeout has elapsed, the interrupt is
1835 treated as a timeout.
1837 5. Some internal re-factoring in preparation for the addition of Sieve
1838 extensions (by MH). In particular, the "personal" test is moved to a
1839 separate function, and given an option for scanning Cc: and Bcc: (which is
1840 not set for Exim filters).
1842 6. When Exim created an email address using the login of the caller as the
1843 local part (e.g. when creating a From: or Sender: header line), it was not
1844 quoting the local part when it contained special characters such as @.
1846 7. Installed new OpenBSD configuration files.
1848 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1849 try to make them clearer.
1851 9. Callout options, other than the timeout value, were being ignored when
1852 verifying sender addresses in header lines. For example, when using
1854 verify = header_sender/callout=no_cache
1856 the cache was (incorrectly) being used.
185810. Added a missing instance of ${EXE} to the exim_install script; this affects
1859 only the Cygwin environment.
186111. When return_path_on_delivery was set as a log selector, if different remote
1862 addresses in the same message used different return paths and parallel
1863 remote delivery occurred, the wrong values would sometimes be logged.
1864 (Whenever a remote delivery process finished, the return path value from
1865 the most recently started remote delivery process was logged.)
186712. RFC 3848 specifies standard names for the "with" phrase in Received: header
1868 lines when AUTH and/or TLS are in use. This is the "received protocol"
1869 field. Exim used to use "asmtp" for authenticated SMTP, without any
1870 indication (in the protocol name) for TLS use. Now it follows the RFC and
1871 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1872 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1873 names appear in log lines as well as in Received: header lines.
187513. Installed MH's patches for Sieve to add the "copy" and "vacation"
1876 extensions, and comparison tests, and to fix some bugs.
187814. Changes to the "personal" filter test:
1880 (1) The test was buggy in that it was just doing the equivalent of
1881 "contains" tests on header lines. For example, if a user's address was
1882 anne@some.where, the "personal" test would incorrectly be true for
1884 To: susanne@some.where
1886 This test is now done by extracting each address from the header in turn,
1887 and checking the entire address. Other tests that are part of "personal"
1888 are now done using regular expressions (for example, to check local parts
1889 of addresses in From: header lines).
1891 (2) The list of non-personal local parts in From: addresses has been
1892 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1893 taken from the Sieve specification recommendations.
1895 (3) If the message contains any header line starting with "List-" it is
1896 treated as non-personal.
1898 (4) The test for "circular" in the Subject: header line has been removed
1899 because it now seems ill-conceived.
190115. Minor typos in src/EDITME comments corrected.
190316. Installed latest exipick from John Jetmore.
190517. If headers_add on a router specified a text string that was too long for
1906 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1907 of string_sprintf() is now avoided.
190918. $message_body_size was not set (it was always zero) when running the DATA
1910 ACL and the local_scan() function.
191219. For the "mail" command in an Exim filter, no default was being set for
1913 the once_repeat time, causing a random time value to be used if "once" was
1914 specified. (If the value happened to be <= 0, no repeat happened.) The
1915 default is now 0s, meaning "never repeat". The "vacation" command was OK
1916 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1917 (I found it when inspecting the code).
191920. There is now an overall timeout for performing a callout verification. It
1920 defaults to 4 times the callout timeout, which applies to individual SMTP
1921 commands during the callout. The overall timeout applies when there is more
1922 than one host that can be tried. The timeout is checked before trying the
1923 next host. This prevents very long delays if there are a large number of
1924 hosts and all are timing out (e.g. when the network connections are timing
1925 out). The value of the overall timeout can be changed by specifying an
1926 additional sub-option for "callout", called "maxwait". For example:
1928 verify = sender/callout=5s,maxwait=20s
193021. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1931 to the end before writing, but this should make it even safer).
193322. Exim was forgetting that it had advertised PIPELINING for the second and
1934 subsequent messages on an SMTP connection. It was also not resetting its
1935 memory on STARTTLS and an internal HELO.
193723. When Exim logs an SMTP synchronization error within a session, it now
1938 records whether PIPELINING has been advertised or not.
194024. Added 3 instances of "(long int)" casts to time_t variables that were being
1941 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1942 rather than long int.
194425. Installed the latest Cygwin configuration files from the Cygwin maintainer.
194626. Added the never_mail option to autoreply.
1949Exim version 4.41
1952 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1953 crash if the getsockname() call failed; this can happen if a connection is
1954 closed very soon after it is established. The problem was simply in the
1955 order in which certain operations were done, causing Exim to try to write
1956 to the SMTP stream before it had set up the file descriptor. The bug has
1957 been fixed by making things happen in the correct order.
1960Exim version 4.40
1963 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1964 before the connection was closed, thus losing the rejection response.
1966 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1967 some early Solaris releases, but causes trouble in current releases where
1968 socklen_t is defined.
1970 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1971 always exist.
1973 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1974 configured.
1976 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1977 that releasing the top of it at the end releases what was used for sub-
1978 expansions (unless the block got too big). However, discard this block if
1979 the first thing is a variable or header, so that we can use its block when
1980 it is dynamic (useful for very large $message_headers, for example).
1982 6. Lookups now cache *every* query, not just the most recent. A new, separate
1983 store pool is used for this. It can be recovered when all lookup caches are
1984 flushed. Lookups now release memory at the end of their result strings.
1985 This has involved some general refactoring of the lookup sources.
1987 7. Some code has been added to the store_xxx() functions to reduce the amount
1988 of flapping under certain conditions.
1990 8. log_incoming_interface used to affect only the <= reception log lines. Now
1991 it causes the local interface and port to be added to several more SMTP log
1992 lines, for example "SMTP connection from", and rejection lines.
1994 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
199610. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
199811. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1999 could be overwritten at the end of the current message (or the start of a
2000 new message if it was set in a HELO ACL). The value is now preserved for
2001 the duration of the SMTP connection.
200312. If a transport had a headers_rewrite setting, and a matching header line
2004 contained an unqualified address, that address was qualified, even if it
2005 did not match any rewriting rules. The underlying bug was that the values
2006 of the flags that permit the existence of unqualified sender and recipient
2007 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2008 non-local messages, and by -bnq for local messages) were not being
2009 preserved with the message after it was received.
201113. When Exim was logging an SMTP synchronization error, it could sometimes log
2012 "next input=" as part of the text comprising the host identity instead of
2013 the correct text. The code was using the same buffer for two different
2014 strings. However, depending on which order the printing function evaluated
2015 its arguments, the bug did not always show up. Under Linux, for example, my
2016 test suite worked just fine.
201814. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2019 doesn't work with some older versions of Perl. It has been changed to "my",
2020 which in any case is probably the better facility to use.
202215. A really picky compiler found some instances of statements for creating
2023 error messages that either had too many or two few arguments for the format
2024 string.
202616. The size of the buffer for calls to the DNS resolver has been increased
2027 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2028 for addresses that have a lot of PTR records. This alleviates a problem; it
2029 does not fully solve it.
203117. A dnsdb lookup for PTR records that receives more data than will fit in the
2032 buffer now truncates the list and logs the incident, which is the same
2033 action as happens when Exim is looking up a host name and its aliases.
2034 Previously in this situation something unpredictable would happen;
2035 sometimes it was "internal error: store_reset failed".
203718. If a server dropped the connection unexpectedly when an Exim client was
2038 using GnuTLS and trying to read a response, the client delivery process
2039 crashed while trying to generate an error log message.
204119. If a "warn" verb in an ACL added multiple headers to a message in a single
2042 string, for example:
2044 warn message = H1: something\nH2: something
2046 the text was added as a single header line from Exim's point of view
2047 though it ended up OK in the delivered message. However, searching for the
2048 second and subsequent header lines using $h_h2: did not work. This has been
2049 fixed. Similarly, if a system filter added multiple headers in this way,
2050 the routers could not see them.
205220. Expanded the error message when iplsearch is called with an invalid key to
2053 suggest using net-iplsearch in a host list.
205521. When running tests using -bh, any delays imposed by "delay" modifiers in
2056 ACLs are no longer actually imposed (and a message to that effect is
2057 output).
205922. If a "gecos" field in a passwd entry contained escaped characters, in
2060 particular, if it contained a \" sequence, Exim got it wrong when building
2061 a From: or a Sender: header from that name. A second bug also caused
2062 incorrect handling when an unquoted " was present following a character
2063 that needed quoting.
206523. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2066 was not being matched caselessly.
206824. Arranged for all hyphens in the exim.8 source to be escaped with
2069 backslashes.
207125. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2072 properly. Recipient callout cache records were still being keyed to include
2073 the sender, even when use_sender was set false. This led to far more
2074 callouts that were necessary. The sender is no longer included in the key
2075 when use_sender is false.
207726. Added "control = submission" modifier to ACLs.
207927. Added the ${base62d: operator to decode base 62 numbers.
208128. dnsdb lookups can now access SRV records.
208329. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2084 the configuration file.
208630. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2087 (-v) mode. This makes the output for a verbose queue run more intelligible.
208931. Added a use_postmaster feature to recipient callouts.
209132. Added the $body_zerocount variable, containing the number of binary zero
2092 bytes in the message body.
209433. The time of last modification of the "new" subdirectory is now used as the
2095 "mailbox time last read" when there is a quota error for a maildir
2096 delivery.
209834. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
210035. Added +ignore_unknown as a special item in host lists.
210236. Code for decoding IPv6 addresses in host lists is now included, even if
2103 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2104 address was recognized as an IP address, but was then not correctly decoded
2105 into binary, causing unexpected and incorrect effects when compared with
2106 another IP address.
2109Exim version 4.34
2112 1. Very minor rewording of debugging text in manualroute to say "list of
2113 hosts" instead of "hostlist".
2115 2. If verify=header_syntax was set, and a header line with an unqualified
2116 address (no domain) and a large number of spaces between the end of the
2117 name and the colon was received, the reception process suffered a buffer
2118 overflow, and (when I tested it) crashed. This was caused by some obsolete
2119 code that should have been removed. The fix is to remove it!
2121 3. When running in the test harness, delay a bit after writing a bounce
2122 message to get a bit more predictability in the log output.
2124 4. Added a call to search_tidyup() just before forking a reception process. In
2125 theory, someone could use a lookup in the expansion of smtp_accept_max_
2126 per_host which, without the tidyup, could leave open a database connection.
2128 5. Added the variables $recipient_data and $sender_data which get set from a
2129 lookup success in an ACL "recipients" or "senders" condition, or a router
2130 "senders" option, similar to $domain_data and $local_part_data.
2132 6. Moved the writing of debug_print from before to after the "senders" test
2133 for routers.
2135 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2136 problems for message scanning, either using a data ACL, or using
2137 local_scan() because the Received: header was not generated till after they
2138 were called (in order to set the time as the time of reception completion).
2139 I have revised the way this works. The header is now generated after the
2140 body is received, but before the ACL or local_scan() are called. After they
2141 are run, the timestamp in the header is updated.
2144Exim version 4.33
2147 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2148 before starting a queue runner without re-exec. This happened only when
2149 deliver_drop_privilege was set or when the Exim user was set to root. The
2150 effect of the bug was that timeouts during subsequent deliveries caused
2151 crashes instead of being properly handled. The handler is now left at its
2152 default (and expected) setting.
2154 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2155 message, again when deliver_drop_privilege is set or Exim is run as root.
2156 The bug described in (1) was not present in this case, but the tidying up
2157 of the other signals was missing. I have made the two cases consistent.
2159 3. The ignore_target_hosts setting on a manualroute router was being ignored
2160 for hosts that were looked up using the /MX notation.
2162 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2163 in domain lists.
2165 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2166 operated on the sender address. After changing the $sender_address to <>
2167 for the sender address verify, Exim was re-instated it as the original
2168 (before rewriting) address, but remembering that it had rewritten it, so it
2169 wasn't rewriting it again. This bug also had the effect of breaking the
2170 sender address verification caching when the sender address was rewritten.
2172 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2173 This has been changed so that if the ip literal address matches
2174 ignore_target_hosts, the router declines.
2176 7. Added expansion conditions match_domain, match_address, and match_local_
2177 part (NOT match_host).
2179 8. The placeholder for the Received: header didn't have a length field set.
2181 9. Added code to Exim itself and to exim_lock to test for a specific race
2182 condition that could lead to file corruption when using MBX delivery. The
2183 issue is with the lockfile that is created in /tmp. If this file is removed
2184 after a process has opened it but before that process has acquired a lock,
2185 there is the potential for a second process to recreate the file and also
2186 acquire a lock. This could lead to two Exim processes writing to the file
2187 at the same time. The added code performs the same test as UW imapd; it
2188 checks after acquiring the lock that its file descriptor still refers to
2189 the same named file.
219110. The buffer for building added header lines was of fixed size, 8192 bytes.
2192 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2193 when Exim is built.
219511. Added the smtp_active_hostname option. If used, this will typically be made
2196 to depend on the incoming interface address. Because $interface_address is
2197 not set up until the daemon has forked a reception process, error responses
2198 that can happen earlier (such as "too many connections") no longer contain
2199 a host name.
220112. If an expansion in a condition on a "warn" statement fails because a lookup
2202 defers, the "warn" statement is abandoned, and the next ACL statement is
2203 processed. Previously this caused the whole ACL to be aborted.
220513. Added the iplsearch lookup type.
220714. Added ident_timeout as a log selector.
220915. Added tls_certificate_verified as a log selector.
221116. Added a global option tls_require_ciphers (compare the smtp transport
2212 option of the same name). This controls incoming TLS connections.
221417. I finally figured out how to make tls_require_ciphers do a similar thing
2215 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2216 before starting the TLS session.
221818. Tabs are now shown as \t in -bP output.
222019. If the log selector return_path_on_delivery was set, Exim crashed when
2221 bouncing a message because it had too many Received: header lines.
222320. If two routers both had headers_remove settings, and the first one included
2224 a superfluous trailing colon, the final name in the first list and the
2225 first name in the second list were incorrectly joined into one item (with a
2226 colon in the middle).
2229Exim version 4.32
2232 1. Added -C and -D options to the exinext utility, mainly to make it easier
2233 to include in the automated testing, but these could be helpful when
2234 multiple configurations are in use.
2236 2. The exinext utility was not formatting the output nicely when there was
2237 an alternate port involved in the retry record key, nor when there was a
2238 message id as well (for retries that were specific to a specific message
2239 and a specific host). It was also confused by IPv6 addresses, because of
2240 the additional colons they contain. I have fixed the IPv4 problem, and
2241 patched it up to do a reasonable job for IPv6.
2243 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2244 delivery, the log line now contains "pipelined" if PIPELINING was used.
2246 4. An SMTP transport process used to panic and die if the bind() call to set
2247 an explicit outgoing interface failed. This has been changed; it is now
2248 treated in the same way as a connect() failure.
2250 5. A reference to $sender_host_name in the part of a conditional expansion
2251 that was being skipped was still causing a DNS lookup. This no longer
2252 occurs.
2254 6. The def: expansion condition was not recognizing references to header lines
2255 that used bh_ and bheader_.
2257 7. Added the _cache feature to named lists.
2259 8. The code for checking quota_filecount in the appendfile transport was
2260 allowing one more file than it should have been.
2262 9. For compatibility with Sendmail, the command line option
2264 -prval:sval
2266 is equivalent to
2268 -oMr rval -oMs sval
2270 and sets the incoming protocol and host name (for trusted callers). The
2271 host name and its colon can be omitted when only the protocol is to be set.
2272 Note the Exim already has two private options, -pd and -ps, that refer to
2273 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2274 "s", but I don't think that's a major issue.
227610. A number of refactoring changes to the code, none of which should affect
2277 Exim's behaviour:
2279 (a) The number of logging options was getting close to filling up the
2280 32-bit word that was used as a bit map. I have split them into two classes:
2281 those that are passed in the argument to log_write(), and those that are
2282 only ever tested independently outside of that function. These are now in
2283 separate 32-bit words, so there is plenty of room for expansion again.
2284 There is no change in the user interface or the logging behaviour.
2286 (b) When building, for example, log lines, the code previously used a
2287 macro that called string_cat() twice, in order to add two strings. This is
2288 not really sufficiently general. Furthermore, there was one instance where
2289 it was actually wrong because one of the argument was used twice, and in
2290 one call a function was used. (As it happened, calling the function twice
2291 did not affect the overall behaviour.) The macro has been replaced by a
2292 function that can join an arbitrary number of extra strings onto a growing
2293 string.
2295 (c) The code for expansion conditions now uses a table and a binary chop
2296 instead of a serial search (which was left over from when there were very
2297 few conditions). Also, it now recognizes conditions like "pam" even when
2298 the relevant support is not compiled in: a suitably worded error message is
2299 given if an attempt is made to use such a condition.
230111. Added ${time_interval:xxxxx}.
230312. A bug was causing one of the ddress fields not to be passed back correctly
2304 from remote delivery subprocesses. The field in question was not being
2305 subsequently used, so this caused to problems in practice.
230713. Added new log selectors queue_time and deliver_time.
230914. Might have fixed a bug in maildirsizefile handling that threw up
2310 "unexpected character" debug warnings, and recalculated the data
2311 unnecessarily. In any case, I expanded the warning message to give more
2312 information.
231415. Added the message "Restricted characters in address" to the statements in
2315 the default ACL that block characters like @ and % in local parts.
231716. Change 71 for release 4.31 proved to be much less benign that I imagined.
2318 Three changes have been made:
2320 (a) There was a serious bug; a negative response to MAIL caused the whole
2321 recipient domain to be cached as invalid, thereby blocking all messages
2322 to all local parts at the same domain, from all senders. This bug has
2323 been fixed. The domain is no longer cached after a negative response to
2324 MAIL if the sender used is not empty.
2326 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2327 been restored.
2329 (c) A new callout option, "use_sender" has been added for people who want
2330 the modified behaviour.
2333Exim version 4.31
2336 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2337 Larry Rosenman.
2339 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2340 indeed breaks things for older releases.
2342 3. Added additional logging to the case where there is a problem reading data
2343 from a filter that is running in a subprocess using a pipe, in order to
2344 try to track down a specific problem.
2346 4. Testing facility fudge: when running in the test harness and attempting
2347 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2348 getting "No route to host". Convert this to a timeout.
2350 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2351 warning.
2353 6. Some OS don't have socklen_t but use size_t instead. This affects the
2354 fifth argument of getsockopt() amongst other things. This is now
2355 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2356 can be set for individual OS. I have set it for SunOS5, OSF1, and
2357 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2358 some earlier ones do not.
2360 7. Change 4.30/15 was not doing the test caselessly.
2362 8. The standard form for an IPv6 address literal was being rejected by address
2363 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2364 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2365 this, as well as the form without the "IPv6" on the front (but only when
2366 address literals are enabled, of course).
2368 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
237010. Exim crashed if a message with an empty sender address specified by -f
2371 encountered a router with an errors_to setting. This could be provoked only
2372 by a command such as
2374 exim -f "" ...
2376 where an empty string was supplied; "<>" did not hit this bug.
237811. Installed PCRE release 4.5.
238012. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2381 remained set. It is now erased.
238313. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2384 times from message ids (which are base 36 rather than the normal 62).
238614. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2387 were being counted as actual protocol errors, and logged if the log
2388 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2389 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2390 and DATA following a set of rejected RCPTs do not count as protocol errors.
2391 In other words, Exim assumes they were pipelined, though this may not
2392 actually be the case. Of course, in all cases the client gets an
2393 appropriate error code.
239515. If a lookup fails in an ACL condition, a message about the failure may
2396 be available; it is used if testing the ACL cannot continue, because most
2397 such messages specify what the cause of the deferral is. However, some
2398 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2399 that caused an old message to be retained and used if a later statement
2400 caused a defer, replacing the real cause of the deferral.
240216. If an IP address had so many PTR records that the DNS lookup buffer
2403 was not large enough to hold them, Exim could crash while trying to process
2404 the truncated data. It now detects and logs this case.
240617. Further to 4.21/58, another change has been made: if (and only if) the
2407 first line of a message (the first header line) ends with CRLF, a bare LF
2408 in a subsequent header line has a space inserted after it, so as not to
2409 terminate the header.
241118. Refactoring: tidied an ugly bit of code in appendfile that copied data
2412 unnecessarily, used atoi() instead of strtol(), and didn't check the
2413 termination when getting file sizes from file names by regex.
241519. Completely re-implemented the support for maildirsize files, in the light
2416 of a number of problems with the previous contributed implementation
2417 (4.30/29). In particular:
2419 . If the quota is zero, the maildirsize file is maintained, but no quota is
2420 imposed.
2422 . If the maildir directory does not exist, it is created before any attempt
2423 to write a maildirsize file.
2425 . The quota value in the file is just a cache; if the quota is changed in
2426 the transport, the new value overrides.
2428 . A regular expression is available for excluding directories from the
2429 count.
243120. The autoreply transport checks the characters in options that define the
2432 message's headers; it allows continued headers, but it was checking with
2433 isspace() after an embedded newline instead of explicitly looking for a
2434 space or a tab.
243621. If all the "regular" hosts to which an address was routed had passed their
2437 expiry times, and had not reached their retry times, the address was
2438 bounced, even if fallback hosts were defined. Now Exim should go on to try
2439 the fallback hosts.
244122. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2442 equivalent code in the SMTP transport. Some hosts send humungous responses
2443 to HELO/EHLO, more than 1024 it seems.
244523. Refactoring: code in filter.c used (void *) for "any old type" but this
2446 gives compiler warnings in some environments. I've now done it "properly",
2447 using a union.
244924. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2450 (because of problems with the built-in one) was declared to return uschar *
2451 instead of char *, causing compiler failure.
245325. Fixed a file descriptor leak when processing alias/forward files.
245526. Fixed a minor format string issue in dbfn.c.
245727. Typo in exim.c: ("dmbnz" for "dbmnz").
245928. If a filter file refered to $h_xxx or $message_headers, and the headers
2460 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2461 become corrupted.
246329. When a sender address is verified, it is cached, to save repeating the test
2464 when there is more than one recipient in a message. However, when the
2465 verification involves a callout, it is possible for different callout
2466 options to be set for different recipients. It is too complicated to keep
2467 track of this in the cache, so now Exim always runs a verification when a
2468 callout is required, relying on the callout cache for the optimization.
2469 The overhead is duplication of the address routing, but this should not be
2470 too great.
247230. Fixed a bug in callout caching. If a RCPT command caused the sender address
2473 to be verified with callout=postmaster, and the main callout worked but the
2474 postmaster check failed, the verification correctly failed. However, if a
2475 subsequent RCPT command asked for sender verification *without* the
2476 postmaster check, incorrect caching caused this verification also to fail,
2477 incorrectly.
247931. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2480 it was not caching the DNS options (qualify_single, search_parents) that
2481 were used when the lookup failed. A subsequent lookup with different
2482 options therefore always gave the same answer, though there were cases
2483 where it should not have. (Example: a "domains = !$mx_any" option on a
2484 dnslookup router: the "domains" option is always processed without any
2485 widening, but the router might have qualify_single set.) Now Exim uses the
2486 cached value only when the same options are set.
248832. Added John Jetmore's "exipick" utility to the distribution.
249033. GnuTLS: When an attempt to start a TLS session fails for any reason other
2491 than a timeout (e.g. a certificate is required, and is not provided), an
2492 Exim server now closes the connection immediately. Previously it waited for
2493 the client to close - but if the client is SSL, it seems that they each
2494 wait for each other, leading to a delay before one of them times out.
249634: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2497 maintained 0.8.x compatibility because I don't think many are using it, and
2498 it is clearly obsolete.
250035. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2501 transport.
250336. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2504 client certificate was expired. A simple patch fixes this, though I don't
2505 understand the full logic of why the verify callback is called multiple
2506 times.
250837. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2509 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2510 which causes problems with some clients (such as the Certicom SSL Plus
2511 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2512 disables the coutermeasure allowing Eudora to connect."
251438. Exim was not checking that a write() to a log file succeeded. This could
2515 lead to Bad Things if a log got too big, in particular if it hit a file
2516 size limit. Exim now panics and dies if it cannot write to a log file, just
2517 as it does if it cannot open a log file.
251939. Modified OS/Makefile-Linux so that it now contains
2523 The two -D definitions ensure that Exim is compiled with large file
2524 support, which makes it possible to handle log files that are bigger than
2525 2^31.
252740. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2528 instance) a domain was checked against a named list that involved a lookup,
2529 causing $domain_data to be set, then another domain was checked against the
2530 same list, then the first domain was re-checked, the value of $domain_data
2531 after the final check could be wrong. In particular, if the second check
2532 failed, it could be set empty. This bug probably also applied to
2533 $localpart_data.
253541. The strip_trailing_dot option was not being applied to the address given
2536 with the -f command-line option.
253842. The code for reading a message's header from the spool was incrementing
2539 $received_count, but never initializing it. This meant that the value was
2540 incorrect (doubled) while delivering a message in the same process in which
2541 it was received. In the most common configuration of Exim, this never
2542 happens - a fresh exec is done - but it can happen when
2543 deliver_drop_privilege is set.
254543. When Exim logs an SMTP synchronization error - client data sent too soon -
2546 it now includes up to 150 characters of the unexpected data in the log
2547 line.
254944. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2550 and building data strings. The size of both of these buffers was 10 000
2551 bytes - far larger than anybody would *ever* want, thought I. Needless to
2552 say, somebody hit the limit. I have increased the maximum line length to
2553 20 000 and the maximum data length of concatenated lines to 100 000. I have
2554 also fixed two bugs, because there was no checking on these buffers. Tsk,
2555 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2556 buffer is too small.
255845. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2559 lsearch lookups. Now it does.
256146. When parsing a route_list item in a manualroute router, a fixed-length
2562 buffer was used for the list of hosts. I made this 1024 bytes long,
2563 thinking that nobody would ever have a list of hosts that long. Wrong.
2564 Somebody had a whole pile of complicated expansion conditions, and the
2565 string was silently truncated, leading to an expansion error. It turns out
2566 that it is easier to change to an unlimited length (owing to other changes
2567 that have happened since this code was originally written) than to build
2568 structure for giving a limitation error. The length of the item that
2569 expands into the list of hosts is now unlimited.
257147. The lsearch lookup could not handle data where the length of text line was
2572 more than 4095 characters. Such lines were truncated, leading to shortened
2573 data being returned. It should now handle lines of any length.
257548. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2576 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2577 ACL").
257949. Cosmetic tidy to scripts like exicyclog that are generated by globally
2580 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2581 no longer happens in comment lines. A list of replacements is now placed
2582 at the head of all of the source files, except those whose only change is
2583 to replace PERL_COMMAND in the very first #! line.
258550. Replaced the slow insertion sort in queue.c, for sorting the list of
2586 messages on the queue, with a bottom-up merge sort, using code contributed
2587 by Michael Haardt. This should make operations like -bp somewhat faster on
2588 large queues. It won't affect queue runners, except when queue_run_in_order
2589 is set.
259151. Installed eximstats 1.31 in the distribution.
259352. Added support for SRV lookups to the dnslookup router.
259553. If an ACL referred to $message_body or $message_body_end, the value was not
2596 reset for any messages that followed in the same SMTP session.
259854. The store-handling optimization for building very long strings was not
2599 differentiating between the different store pools. I don't think this
2600 actually made any difference in practice, but I've tidied it.
260255. While running the routers to verify a sender address, $sender_address
2603 was still set to the sender address. This is wrong, because when routing to
2604 send a bounce to the sender, it would be empty. Therefore, I have changed
2605 it so that, while verifying a sender address, $sender_address is set to <>.
2606 (There is no change to what happens when verifying a recipient address.)
260856. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2609 target A or AAAA records (if not already returned) without resetting the
2610 qualify_single or search_parents options of the DNS resolver. These are
2611 inappropriate in this case because the targets of MX and SRV records must
2612 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2613 target that, when qualified, matched something in the local domain. These
2614 two options are now turned off when doing these lookups.
261657. It seems that at least some releases of Reiserfs (which does not have the
2617 concept of a fixed number of inodes) returns zero and not -1 for the
2618 number of available inodes. This interacted badly with check_spool_inodes,
2619 which assumed that -1 was the "no such thing" setting. What I have done is
2620 to check that the total number of inodes is greater than zero before doing
2621 the test of how many are available.
262358. When a "warn" ACL statement has a log_message modifier, the message is
2624 remembered, and not repeated. This is to avoid a lot of repetition when a
2625 message has many recipients that cause the same warning to be written.
2626 Howewer, Exim was preserving the list of already written lines for an
2627 entire SMTP session, which doesn't seem right. The memory is now reset if a
2628 new message is started.
263059. The "rewrite" debugging flag was not showing the result of rewriting in the
2631 debugging output unless log_rewrite was also set.
263360. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2634 of (int)(handle) when we know that handle contains (void *)(-1).
263661. The Exim daemon panic-logs an error return when it closes the incoming
2637 connection. However "connection reset by peer" seems to be common, and
2638 isn't really an error worthy of noting specially, so that particular error
2639 is no long logged.
264162. When Exim is trying to find all the local interfaces, it used to panic and
2642 die if the ioctl to get the interface flags failed. However, it seems that
2643 on at least one OS (Solaris 9) it is possible to have an interface that is
2644 included in the list of interfaces, but for which you get a failure error
2645 for this call. This happens when the interface is not "plumbed" into a
2646 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2647 failure of the "get flags" call assumes that the interface is down.
264963. Added a ${eval10: operator, which assumes all numbers are decimal. This
2650 makes life easier for people who are doing arithmetic on fields extracted
2651 from dates, where you often get leading zeros that should not be
2652 interpreted as octal.
265464. Added qualify_domain to the redirect router, to override the global
2655 setting.
265765. If a pathologically long header line contained very many addresses (the
2658 report of this problem mentioned 10 000) and each of them was rewritten,
2659 Exim could use up a very large amount of memory. (It kept on making new
2660 copies of the header line as it rewrote, and never released the old ones.)
2661 At the expense of a bit more processing, the header rewriting function has
2662 been changed so that it no longer eats memory in this way.
266466. The generation of the Received: header has been moved from the time that a
2665 message starts to be received, to the time that it finishes. The timestamp
2666 in the Received: header should now be very close to that of the <= log
2667 line. There are two side-effects of this change:
2669 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2670 logged header lines no longer include the local Received: line, because
2671 it has not yet been created. The same applies to a copy of the message
2672 that is returned to a non-SMTP sender when a message is rejected.
2674 (b) When a filter file is tested using -bf, no additional Received: header
2675 is added to the test message. After some thought, I decided that this
2676 is a bug fix.
2678 This change does not affect the value of $received_for. It is still set
2679 after address rewriting, but before local_scan() is called.
268167. Installed the latest Cygwin-specific files from the Cygwin maintainer.
268368. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2684 gave an unhelpful panic error message, and a defer error. I have managed to
2685 change this behaviour so that it now rejects any supplied certificate,
2686 which seems right, as the list of acceptable certificates is empty.
268869. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2689 gave an unhelpful defer error. I have not managed to make this reject any
2690 supplied certificates, but the error message it gives is "no certificate
2691 supplied", which is not helpful.
269370. exigrep's output now also includes lines that are not associated with any
2694 message, but which match the given pattern. Implemented by a patch from
2695 Martin Sluka, which also tidied up the Perl a bit.
269771. Recipient callout verification, like sender verification, was using <> in
2698 the MAIL FROM command. This isn't really the right thing, since the actual
2699 sender may affect whether the remote host accepts the recipient or not. I
2700 have changed it to use the actual sender in the callout; this means that
2701 the cache record is now keyed on a recipient/sender pair, not just the
2702 recipient address. There doesn't seem to be a real danger of callout loops,
2703 since a callout by the remote host to check the sender would use <>.
2704 [SEE ABOVE: changed after hitting problems.]
270672. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2707 temporary errors. However, in the case of such a code being given after
2708 the end of a data transmission (i.e. after ".") Exim was failing to write
2709 a retry record for the message. (Yes, there was some broken host that was
2710 actually sending 8xx at this point.)
271273. An unknown lookup type in a host list could cause Exim to panic-die when
2713 the list was checked. (An example that provoked this was putting <; in the
2714 middle of a list instead of at the start.) If this happened during a DATA
2715 ACL check, a -D file could be left lying around. This kind of configuration
2716 error no longer causes Exim to die; instead it causes a defer errror. The
2717 incident is still logged to the main and panic logs.
271974. Buglet left over from Exim 3 conversion. The message "too many messages
2720 in one connection" was written to the rejectlog but not the mainlog, except
2721 when address rewriting (yes!) was being logged.
272375. Added write_rejectlog option.
272576. When a system filter was run not as root (that is, when system_filter_user
2726 was set), the values of the $n variables were not being returned to the
2727 main process; thus, they were not subsequently available in the $sn
2728 variables.
273077. Added +return_path_on_delivery log selector.
273278. A connection timeout was being treated differently from recipients deferred
2733 when testing hosts_max_try with a message that was older than the host's
2734 retry timeout. (The host should not be counted, thus allowing all hosts to
2735 be tried at least once before bouncing.) This may have been the cause of an
2736 occasionally reported bug whereby a message would remain on the queue
2737 longer than the retry timeout, but would be bounced if a delivery was
2738 forced. I say "may" because I never totally pinned down the problem;
2739 setting up timeout/retry tests is difficult. See also the next item.
274179. The ultimate address timeout was not being applied to errors that involved
2742 a combination of host plus message (for example, a timeout on a MAIL
2743 command). When an address resolved to a number of possible hosts, and they
2744 were not all tried for each delivery (e.g. because of hosts_max_try), a
2745 message could remain on the queue longer than the retry timeout.
274780. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2748 Haardt.
275081. Fixed an obscure SMTP outgoing bug which required at least the following
2751 conditions: (a) there was another message waiting for the same server;
2752 (b) the server returned 5xx to all RCPT commands in the first message so
2753 that the message was not completed; (c) the server dropped the connection
2754 or gave a negative response to the RSET that Exim sends to abort the
2755 transaction. The observed case was a dropped connection after DATA that had
2756 been sent in pipelining mode. That is, the server had advertised PIPELINING
2757 but was not implementing it correctly. The effect of the bug was incorrect
2758 behaviour, such as trying another host, and this could lead to a crash.
2761Exim version 4.30
2764 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2765 and daemon.c were passed as pointers to ints; they should have been
2766 pointers to socklen_t variables (which are typically unsigned ints).
2768 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2769 fixed.
2771 3. Fixed a really odd bug that affected only the testing scheme; patching a
2772 certain fixed string in the binary changed the value of another string that
2773 happened to be identical to the end of the original first string.
2775 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2776 name", it returns that address as the IP address. On some operating
2777 systems (e.g. Solaris), it also passes back the IP address string as the
2778 "host name". However, on others (e.g. Linux), it passes back an empty
2779 string. Exim wasn't checking for this, and was changing the host name to an
2780 empty string, assuming it had been canonicized.
2782 5. Although rare, it is permitted to have more than one PTR record for a given
2783 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2784 all the names associated with an address, because they do in Solaris.
2785 However, it seems that they do not in Linux for data that comes from the
2786 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2787 I found this out when I moved to a new Linux workstation and tried to run
2788 the Exim test suite.
2790 To get round this problem I have changed the code so that it now does its
2791 own call to the DNS to look up PTR records when searching for a host name.
2792 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2793 addresses that are only in /etc/hosts are still found.
2795 This behaviour is, however, controlled by an option called host_lookup_
2796 order, which defaults to "bydns:byaddr". If people want to use the other
2797 order, or indeed, just use one or the other means of lookup, they can
2798 specify it in this variable.
2800 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2801 some operating systems, this comes back from gethostbyaddr() as an empty
2802 string, and this is what Exim used to test for. However, it seems that in
2803 other systems, "." is yielded. Exim now tests for this case too.
2805 7. The values of check_spool_space and check_log_space are now held internally
2806 as a number of kilobytes instead of an absolute number of bytes. If a
2807 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2808 kilobyte. This means that much larger values can be stored.
2810 8. Exim monitor: an attempt to get the action menu when not actually pointing
2811 at a message produces an empty menu entitled "No message selected". This
2812 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2813 no entries in it ("Shell widget menu has zero width and/or height"). So I
2814 have added a single, blank menu entry in this case.
2816 9. Added ${quote_local_part.
281810. MIME decoding is now applied to the contents of Subject: header lines when
2819 they are logged.
282111. Now that a reference to $sender_host_address automatically causes a reverse
2822 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2823 host lookup before query-style lookups in lists that might use this
2824 variable. This has therefore been abolished, and the "net-" prefix is no
2825 longer necessary for query-style lookups.
282712. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2828 have been a typo for LFLAGS, so it has been changed.
283013. The install script calls Exim with "-C /dev/null" in order to find the
2831 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2832 to be output. Howeve, since Exim outputs its version number before the
2833 error, it didn't break the script. It just looked ugly. I fixed this by
2834 always allowing "-C /dev/null" if the caller is root.
283614. Ignore overlarge ACL variable number when reading spool file - insurance
2837 against a later release with more variables having written the file.
283915. The standard form for an IPv6 address literal was being rejected by EHLO.
2840 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2841 this, as well as the form without the "IPv6" on the front.
284316. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2844 OS/Makefile-Darwin file.
284617. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2847 only to LDAP libraries that do not have LDAP_OPT_DEREF.
284918. After change 4.21/52, "%ld" was used to format the contents of the $inode
2850 variable. However, some OS use ints for inodes. I've added cast to long int
2851 to get rid of the compiler warning.
285319. I had forgotten to lock out "/../" in configuration file names when
2854 ALT_CONFIG_PREFIX was set.
285620. Routers used for verification do not need to specify transports. However,
2857 if such a router generated a host list, and callout was configured, Exim
2858 crashed, because it could not find a port number from the (non-existent)
2859 transport. It now assumes port 25 in this circumstance.
286121. Added the -t option to exigrep.
286322. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2864 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2865 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2866 them is set, LOOKUP_LSEARCH is forced.
286823. "exim -bV" now outputs a list of lookups that are included in the binary.
287024. Added sender and host information to the "rejected by local_scan()" log
2871 line; previously there was no indication of these.
287325. Added .include_if_exists.
287526. Change 3.952/11 added an explicit directory sync on top of a file sync for
2876 Linux. It turns out that not all file systems support this. Apparently some
2877 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2878 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2879 not supported on the file descriptor, is now ignored when Exim is trying to
2880 sync a directory. This applies only to Linux.
288227. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
288428. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2885 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2886 this.
288829. Added support for maildirsize files from supplied patch (modified a bit).
289030. The use of :fail: followed by an empty string could lead Exim to respond to
2891 sender verification failures with (e.g.):
2893 550 Verification failed for <xxx>
2894 550 Sender verify failed
2896 where the first response line was missing the '-' that indicates it is not
2897 the final line of the response.
289931. The loop for finding the name of the user that called Exim had a hardwired
2900 limit of 10; it now uses the value of finduser_retries, which is used for
2901 all other user lookups.
290332. Added $received_count variable, available in data and not_smtp ACLs, and at
2904 delivery time.
290633. Exim was neglecting to zero errno before one call of strtol() when
2907 expanding a string and expecting an integer value. On some systems this
2908 resulted in spurious "integer overflow" errors. Also, it was casting the
2909 result into an int without checking.
291134. Testing for a connection timeout using "timeout_connect" in the retry rules
2912 did not work. The code looks as if it has *never* worked, though it appears
2913 to have been documented since at least releast 1.62. I have made it work.
291535. The "timeout_DNS" error in retry rules, also documented since at least
2916 1.62, also never worked. As it isn't clear exactly what this means, and
2917 clearly it isn't a major issue, I have abolished the feature by treating it
2918 as "timeout", and writing a warning to the main and panic logs.
292036. The display of retry rules for -brt wasn't always showing the error code
2921 correctly.
292337. Added new error conditions to retry rules: timeout_A, timeout_MX,
2924 timeout_connect_A, timeout_connect_MX.
292638. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2927 to the empty sender.
292939. The daemon was not analysing the content of -oX till after it had closed
2930 stderr and disconnected from the controlling terminal. This meant that any
2931 syntax errors were only noted on the panic log, and the return code from
2932 the command was 0. By re-arranging the code a little, I've made the
2933 decoding happen first, so such errors now appear on stderr, and the return
2934 code is 1. However, the actual setting up of the sockets still happens in
2935 the disconnected process, so errors there are still only recorded on the
2936 panic log.
293840. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2939 connections (as happens on some IP stacks) was logged at start up time as
2940 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2941 it from "IPv6 and IPv4", which means that two separate sockets are being
2942 used.
294441. The debug output for gethostbyname2() or getipnodebyname() failures now
2945 says whether AF_INET or AF_INET6 was passed as an argument.
294742. Exiwhat output was messed up when time zones were included in log
2948 timestamps.
295043. Exiwhat now gives more information about the daemon's listening ports,
2951 and whether -tls-on-connect was used.
295344. The "port" option of the smtp transport is now expanded.
295545. A "message" modifier in a "warn" statement in a non-message ACL was being
2956 silently ignored. Now an error message is written to the main and panic
2957 logs.
295946. There's a new ACL modifier called "logwrite" which writes to a log file
2960 as soon as it is encountered.
296247. Added $local_user_uid and $local_user_gid at routing time.
296448. Exim crashed when trying to verify a sender address that was being
2965 rewritten to "<>".
296749. Exim was recognizing only a space character after ".include". It now also
2968 recognizes a tab character.
297050. Fixed several bugs in the Perl script that creates the exim.8 man page by
2971 extracting the relevant information from the specification. The man page no
2972 longer contains scrambled data for the -d option, and I've added a section
2973 at the front about calling Exim under different names.
297551. Added "extra_headers" argument to the "mail" command in filter files.
297752. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2978 crash.
298053. Installed eximstats 1.29.
298254. Added transport_filter_timeout as a generic transport option.
298455. Exim no longer adds an empty Bcc: header to messages that have no To: or
2985 Cc: header lines. This was required by RFC 822, but it not required by RFC
2986 2822.
298856. Exim used to add From:, Date:, and Message-Id: header lines to any
2989 incoming messages that did not have them. Now it does so only if the
2990 message originates locally, that is, if there is no associated remote host
2991 address. When Resent- header lines are present, this applies to the Resent-
2992 lines rather than the non-Resent- lines.
299457. Drop incoming SMTP connection after too many syntax or protocol errors. The
2995 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
299758. Messages for configuration errors now include the name of the main
2998 configuration file - useful now that there may be more than one file in a
2999 list (.included file names were always shown).
300159. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3002 for those rare installations that do not start the daemon as root or run it
3003 setuid root. I've cut out the call to initgroups() if the daemon is not
3004 root at that time.
300660. The Exim user and group can now be bound into the binary as text strings
3007 that are looked up at the start of Exim's processing.
300961. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
301162. Added $mailstore_basename variable.
301363. Installed patch to sieve.c from Michael Haardt.
301564. When Exim failed to open the panic log after failing to open the main log,
3016 the original message it was trying to log was written to stderr and debug
3017 output, but if they were not available (the usual case in production), it
3018 was lost. Now it is written to syslog before the two lines that record the
3019 failures to open the logs.
302165. Users' Exim filters run in subprocesses under the user's uid. It is
3022 possible for a "deliver" command or an alias in a "personal" command to
3023 provoke an address rewrite. If logging of address rewriting is configured,
3024 this fails because the process is not running as root or exim. There may be
3025 a better way of dealing with this, but for the moment (because 4.30 needs
3026 to be released), I have disabled address rewrite logging when running a
3027 filter in a non-root, non-exim process.
3030Exim version 4.24
3033 1. The buildconfig auxiliary program wasn't quoting the value set for
3034 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3035 not defined. This bug was masked in 4.22 by the effect that was fixed in
3036 change 4.23/1.
3038 2. Some messages that were rejected after a message id was allocated were
3039 shown as "incomplete" by exigrep. It no longer does this for messages that
3040 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3042 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3043 have allow_domain_literals set, the ID did not get logged in the <= line.
3044 Domain literals are now always recognized in Message-ID: header lines.
3046 4. The first argument for a ${extract expansion item is the key name or field
3047 number. Leading and trailing spaces in this item were not being ignored,
3048 causing some misleading effects.
3050 5. When deliver_drop_privilege was set, single queue runner processes started
3051 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3052 same command in the process it spins off) were not dropping privilege.
3054 6. When the daemon running as "exim" started a queue runner, it always
3055 re-executed Exim in the spun-off process. This is a waste of effort when
3056 deliver_drop_privilege is set. The new process now just calls the
3057 queue-runner function directly.
3060Exim version 4.23
3063 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3066 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3067 ignored. Though the use of -oP was forcing the writing of a pid file, it
3068 was always written to the default place.
3070 3. If the message "no IP address found for host xxxx" is generated during
3071 incoming verification, it is now followed by identification of the incoming
3072 connection (so you can more easily find what provoked it).
3074 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3076 5. Added some features to "harden" Exim a bit more against certain attacks:
3078 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3079 be put in Local/Makefile. This is like the never_users runtime option,
3080 but it cannot be overridden. The default setting is "root".
3082 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3083 prefix string with which any file named in a -C command line option
3084 must start.
3086 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3087 is retained for -C and -D only if the caller of Exim is root. Without
3088 it, the exim user may also use -C and -D and retain privilege.
3090 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3091 command line option is disabled.
3093 6. Macro names set by the -D option must start with an upper case letter, just
3094 like macro names defined in the configuration file.
3096 7. Added "dereference=" facility to LDAP.
3098 8. Two instances of the typo "uknown" in the source files are fixed.
3100 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3101 the Configure-Makefile script screwed up while processing it.
310310. Incorporated PCRE 4.4.
310511. The SMTP synchronization check was not operating right at the start of an
3106 SMTP session. For example, it could not catch a HELO sent before the client
3107 waited for the greeting. There is now a check for outstanding input at the
3108 point when the greeting is written. Because of the duplex, asynchronous
3109 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3110 way, but not yet received, when the check is performed.
311212. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3113 on TCP/IP sockets, because this apparently causes some broken clients to
3114 timeout.
311613. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3117 unchanged) from the Cygwin maintainer.
311914. The code for -bV that shows what is in the binary showed "mbx" when maildir
3120 was supported instead of testing for mbx. Effectively a typo.
312215. The spa authenticator server code was not checking that the input it
3123 received was valid base64.
312516. The debug output line for the "set" modifier in ACLs was not showing the
3126 name of the variable that was being set.
312817. Code tidy: the variable type "vtype_string" was never used. Removed it.
313018. Previously, a reference to $sender_host_name did not cause a DNS reverse
3131 lookup on its own. Something else was needed to trigger the lookup. For
3132 example, a match in host_lookup or the need for a host name in a host list.
3133 Now, if $sender_host_name is referenced and the host name has not yet been
3134 looked up, a lookup is performed. If the lookup fails, the variable remains
3135 empty, and $host_lookup_failed is set to "1".
313719. Added "eqi" as a case-independent comparison operator.
313920. The saslauthd authentication condition could segfault if neither service
3140 nor realm was specified.
314221. If an overflowing value such as "2048M" was set for message_size_limit, the
3143 error message that was logged was misleading, and incoming SMTP
3144 connections were dropped. The message is now more accurate, and temporary
3145 errors are given to SMTP connections.
314722. In some error situations (such as 21 above) Exim rejects all SMTP commands
3148 (except RSET) with a 421 error, until QUIT is received. However, it was
3149 failing to send a response to QUIT.
315123. The HELO ACL was being run before the code for helo_try_verify_hosts,
3152 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3153 ACL is now run after the helo_try_verify_hosts code.
315524. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3156 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3157 case-independent, so other case variants are also recognized). Apparently
3158 some systems use these upper case variants.
316025. If more than two messages were waiting for the same host, and a transport
3161 filter was specified for the transport, Exim sent two messages over the
3162 same TCP/IP connection, and then failed with "socket operation on non-
3163 socket" when it tried to send the third.
316526. Added Exim::debug_write and Exim::log_write for embedded Perl use.
316727. The extern definition of crypt16() in expand.c was not being excluded when
3168 the OS had its own crypt16() function.
317028. Added bounce_return_body as a new option, and bounce_return_size_limit
3171 as a preferred synonym for return_size_limit, both as an option and as an
3172 expansion variable.
317429. Added LIBS=-liconv to OS/Makefile-OSF1.
317630. Changed the default configuration ACL to relax the local part checking rule
3177 for addresses that are not in any local domains. For these addresses,
3178 slashes and pipe symbols are allowed within local parts, but the sequence
3179 /../ is explicitly forbidden.
318131. SPA server authentication was not clearing the challenge buffer before
3182 using it.
318432. log_message in a "warn" ACL statement was writing to the reject log as
3185 well as to the main log, which contradicts the documentation and doesn't
3186 seem right (because no rejection is happening). So I have stopped it.
318833. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3189 However, I am unable to do any testing of this.
319134. Fixed an infelicity in the appendfile transport. When checking directories
3192 for a mailbox, to see if any needed to be created, it was accidentally
3193 using path names with one or more superfluous leading slashes; tracing
3194 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
319635. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3197 contents are added to the log line that is written for every discarded
3198 recipient. (Previously a log_message setting was ignored.)
320036. The ${quote: operator now quotes the string if it is empty.
320237. The install script runs exim in order to find its version number. If for
3203 some reason other than non-existence or emptiness, which it checks, it
3204 could not run './exim', it was installing it with an empty version number,
3205 i.e. as "exim-". This error state is now caught, and the installation is
3206 aborted.
320838. An argument was missing from the function that creates an error message
3209 when Exim fails to connect to the socket for saslauthd authentication.
3210 This could cause Exim to crash, or give a corrupted message.
321239. Added isip, isip4, and isip6 to ${if conditions.
321440. The ACL variables $acl_xx are now saved with the message, and can be
3215 accessed later in routers, transports, and filters.
321741. The new lookup type nwildlsearch is like wildlsearch, except that the key
3218 strings in the file are not string-expanded.
322042. If a MAIL command specified a SIZE value that was too large to fit into an
3221 int variable, the check against message_size_limit failed. Such values are
3222 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3223 day this will have to be increased, but I don't think I want to be around
3224 when emails are that large.
3228Exim version 4.22
3231 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3232 iconv() is not standard in FreeBSD.
3234 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3235 IPv6 enabled. The observed symptom was a segmentation fault on return from
3236 the function os_common_find_running_interfaces() in src/os.c.
3238 3. In the check_special_case() function in daemon.c I had used "errno" as an
3239 argument name, which causes warnings on some systems. This was basically a
3240 typo, since it was named "eno" in the comments!
3242 4. The code that waits for the clock to tick (at a resolution of some fraction
3243 of a second) so as to ensure message-id uniqueness was always waiting for
3244 at least one whole tick, when it could have waited for less. [This is
3245 almost certainly not relevant at current processor speeds, where it is
3246 unlikely to ever wait at all. But we try to future-proof.]
3248 5. The function that sleeps for a time interval that includes fractions of a
3249 second contained a race. It did not block SIGALRM between setting the
3250 timer, and suspending (a couple of lines later). If the interval was short
3251 and the sigsuspend() was delayed until after it had expired, the suspension
3252 never ended. On busy systems this could lead to processes getting stuck for
3253 ever.
3255 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3256 process, before it forks any delivery processes. The open lookup caching
3257 mechanism meant that the open file or database connection was passed into
3258 the delivery process. The problem was that delivery processes always tidy
3259 up cached lookup data. This could cause a problem for the next delivery
3260 process started by the queue runner, because the external queue runner
3261 process does not know about the closure. So the next delivery process
3262 still has data in the lookup cache. In the case of a file lookup, there was
3263 no problem because closing a file descriptor in a subprocess doesn't affect
3264 the parent. However, if the lookup was caching a connection to a database,
3265 the connection was closed, and the second delivery process was likely to
3266 see errors such as "PGSQL: query failed: server closed the connection
3267 unexpectedly". The problem has been fixed by closing all cached lookups
3268 in a queue runner before running a delivery process.
3270 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3271 seem to have the "const" qualifier which it has on other OS. I've
3272 parameterised it.
3274 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3275 *of the same type* (client or server) with the same public name that an
3276 error should be diagnosed.
3278 9. When Exim looked up a host name for an IP address, but failed to find the
3279 original IP address when looking up the host name (a safety check), it
3280 output the message "<ip address> does not match any IP for NULL", which was
3281 confusing, to say the least. The bug was that the host name should have
3282 appeared instead of "NULL".
328410. Since release 3.03, if Exim is called by a uid other than root or the Exim
3285 user that is built into the binary, and the -C or -D options is used, root
3286 privilege is dropped before the configuration file is read. In addition,
3287 logging is switched to stderr instead of the normal log files. If the
3288 configuration then re-defines the Exim user, the unprivileged environment
3289 is probably not what is expected, so Exim logs a panic warning message (but
3290 proceeds).
3292 However, if deliver_drop_privilege is set, the unprivileged state may well
3293 be exactly what is intended, so the warning has been cut out in that case,
3294 and Exim is allowed to try to write to its normal log files.
3297Exim version 4.21
3300 1. smtp_return_error_details was not giving details for temporary sender
3301 or receiver verification errors.
3303 2. Diagnose a configuration error if two authenticators have the same public
3304 name.
3306 3. Exim used not to create the message log file for a message until the first
3307 delivery attempt. This could be confusing when incoming messages were held
3308 for policy or load reasons. The message log file is now created at the time
3309 the message is received, and an initial "Received" line is written to it.
3311 4. The automatically generated man page for command line options had a minor
3312 bug that caused no ill effects; however, a more serious problem was that
3313 the procedure for building the man page automatically didn't always
3314 operate. Consequently, release 4.20 contains an out-of-date version. This
3315 shouldn't happen again.
3317 5. When building Exim with embedded Perl support, the script that builds the
3318 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3319 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3321 6. The freeze_tell option was not being used for messages that were frozen on
3322 arrival, either by an ACL or by local_scan().
3324 7. Added the smtp_incomplete_transaction log selector.
3326 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3327 was accepting AUTH without a new EHLO.
3329 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3330 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3331 RFC.
333310. Logging of TCP/IP connections (when configured) now happens in the main
3334 daemon process instead of the child process, so that the TCP/IP connection
3335 count is more accurate (but it can never be perfect).
333711. The use of "drop" in a nested ACL was not being handled correctly in the
3338 outer ACL. Now, if condition failure induced by the nested "drop" causes
3339 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3340 or "require"), the connection is dropped.
334212. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3343 that yield "discard" can now be used with an "accept" or a "discard" verb,
3344 but an error is generated for any others (because I can't see a useful way
3345 to define what should happen).
334713. When an ACL is read dynamically from a file (or anywhere else), the lines
3348 are now processed in the same way as lines in the Exim configuration file.
3349 In particular, continuation lines are supported.
335114. Added the "dnslists = a.b.c!=n.n.n.n" feature.
335315. Added -ti meaning -t -i.
335516. Check for letters, digits, hyphens, and dots in the names of dnslist
3356 domains, and warn by logging if others are found.
335817. At least on BSD, alignment is not guarenteed for the array of ifreq's
3359 returned from GIFCONF when Exim is trying to find the list of interfaces on
3360 a host. The code in os.c has been modified to copy each ifreq to an aligned
3361 structure in all cases.
3363 Also, in some cases, the returned ifreq's were being copied to a 'struct
3364 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3365 means the last couple of bytes of an IPv6 address could be chopped if the
3366 ifreq contained only a normal sockaddr (14 bytes storage).
336818. Named domain lists were not supported in the hosts_treat_as_local option.
3369 An entry such as +xxxx was not recognized, and was treated as a literal
3370 domain name.
337219. Ensure that header lines added by a DATA ACL are included in the reject log
3373 if the ACL subsequently rejects the message.
337520. Upgrade the utility script to use Digest::MD5 instead of just
3376 MD5 (which is deprecated).
337821. When testing a filter file using -bf, Exim was writing a message when it
3379 took the sender from a "From " line in the message, but it was not doing so
3380 when it took $return_path from a Return-Path: header line. It now does.
338222. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3383 with a valid header line field name (a series of printing characters
3384 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
338623. Changed "disc" in the source to "disk" to conform to the documentation and
3387 the book and for uniformity.
338924. Ignore Sendmail's -Ooption=value command line item.
339125. When execve() failed while trying to run a command in a pipe transport,
3392 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3393 could be confused with a return value of 69 from the command itself. This
3394 has been changed to 127, the value the shell returns if it is asked to run
3395 a non-existent command. The wording for the related log line suggests a
3396 non-existent command as the problem.
339826. If received_header_text expands to an empty string, do not add a Received:
3399 header line to the message. (Well, it adds a token one on the spool, but
3400 marks it "old" so that it doesn't get used or transmitted.)
340227. Installed eximstats 1.28 (addition of -nt option).
340428. There was no check for failure on the call to getsockname() in the daemon
3405 code. This can fail if there is a shortage of resources on the system, with
3406 ENOMEM, for example. A temporary error is now given on failure.
340829. Contrary to the C standard, it seems that in some environments, the
3409 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3410 program. Exim now does this explicitly; it affects the formatting of
3411 timestamps using strftime().
341330. If exiqsumm was given junk data, it threw up some uninitialized variable
3414 complaints. I've now initialized all the variables, to avoid this.
341632. Header lines added by a system filter were not being "seen" during
3417 transport-time rewrites.
341933. The info_callback() function passed to OpenSSL is set up with type void
3420 (*)(SSL *, int, int), as described somewhere. However, when calling the
3421 function (actually a macro) that sets it up, the type void(*)() is
3422 expected. I've put in a cast to prevent warnings from picky compilers.
342434. If a DNS black list lookup found a CNAME record, but there were no A
3425 records associated with the domain it pointed at, Exim crashed.
342735. If a DNS black list lookup returned more than one A record, Exim ignored
3428 all but the first. It now scans all returned addresses if a particular IP
3429 value is being sought. In this situation, the contents of the
3430 $dnslist_value variable are a list of all the addresses, separated by a
3431 comma and a space.
343336. Tightened up the rules for host name lookups using reverse DNS. Exim used
3434 to accept a host name and all its aliases if the forward lookup for any of
3435 them yielded the IP address of the incoming connection. Now it accepts only
3436 those names whose forward lookup yields the correct IP address. Any other
3437 names are discarded. This closes a loophole whereby a rogue DNS
3438 administrator could create reverse DNS records to break through a
3439 wildcarded host restriction in an ACL.
344137. If a user filter or a system filter that ran in a subprocess used any of
3442 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3443 the wrong values were passed to the pipe command ($thisaddress had the
3444 value of $0, $0 had the value of $1, etc). This bug was introduced by
3445 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
344738. Improved the line breaking for long SMTP error messages from ACLs.
3448 Previously, if there was no break point between 40 and 75 characters, Exim
3449 left the rest of the message alone. Two changes have been made: (a) I've
3450 reduced the minimum length to 35 characters; (b) if it can't find a break
3451 point between 35 and 75 characters, it looks ahead and uses the first one
3452 that it finds. This may give the occasional overlong line, but at least the
3453 remaining text gets split now.
345539. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3456 file descriptors might be low, and that setting 1000 would always raise it.
3457 It turns out that in some environments, the limit is already over 1000 and
3458 that lowering it causes trouble. So now Exim takes care not to decrease it.
346040. When delivering a message, the value of $return_path is set to $sender_
3461 address at the start of routing (routers may change the value). By an
3462 oversight, this default was not being set up when an address was tested by
3463 -bt or -bv, which affected the outcome if any router or filter referred to
3464 $return_path.
346641. The idea of the "warn" ACL verb is that it adds a header or writes to the
3467 log only when "message" or "log_message" are set. However, if one of the
3468 conditions was an address verification, or a call to a nested ACL, the
3469 messages generated by the underlying test were being passed through. This
3470 no longer happens. The underlying message is available in $acl_verify_
3471 message for both "message" and "log_message" expansions, so it can be
3472 passed through if needed.
347442. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3475 new expansion $bh_ to give the encoded byte string without charset
3476 translation. Translation happens only if iconv() is available; HAVE_ICONV
3477 indicates this at build time. HEADERS_CHARSET gives the charset to
3478 translate to; headers_charset can change it in the configuration, and
3479 "headers charset" can change it in an individual filter file.
348143. Now that we have a default RFC 2047 charset (see above), the code in Exim
3482 that creates RFC 2047 encoded "words" labels them as that charset instead
3483 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3484 expansion operator; (ii) when Exim creates a From: line for a local
3485 message; (iii) when a header line is rewritten to include a "phrase" part.
348744. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3488 buggy, causing it to skip the first lines of messages whose message ID
3489 ended in 'D'. This would not have bitten before Exim release 4.14, because
3490 message IDs were unlikely to end in 'D' before then. The effect was to have
3491 incorrect size information for certain domains.
349345. #include "config.h" was missing at the start of the crypt16.c module. This
3494 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3495 noticed.
349746. If there was a timeout during a "random" callout check, Exim treated it as
3498 a failure of the random address, and carried on sending RSET and the real
3499 address. If the delay was just some slowness somewhere, the response to the
3500 original RCPT would be taken as a response to RSET and so on, causing
3501 mayhem of various kinds.
350347. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3504 when I implemented it. It didn't allow for the fact that some option values
3505 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3506 the right test for positive values.
350848. Domain names in DNS records are case-independent. Exim always looks them up
3509 in lower case. Some resolvers return domain names in exactly the case they
3510 appear in the zone file, that is, they may contain uppercase letters. Not
3511 all resolvers do this - some return always lower case. Exim was treating a
3512 change of case by a resolver as a change of domain, similar to a widening
3513 of a domain abbreviation. This triggered its re-routing code and so it was
3514 trying to route what was effectively the same domain again. This normally
3515 caused routing to fail (because the router wouldn't handle the domain
3516 twice). Now Exim checks for this case specially, and just changes the
3517 casing of the domain that it ultimately uses when it transmits the message
3518 envelope.
352049. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3521 module.
352350. If a filter generated a file delivery with a non-absolute name (possible if
3524 no home directory exists for the router), the forbid_file option was not
3525 forbidding it.
352751. Added '&' feature to dnslists, to provide bit mask matching in addition to
3528 the existing equality matching.
353052. Exim was using ints instead of ino_t variables in some places where it was
3531 dealing with inode numbers.
353353. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3534 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3535 called TMPDIR, and if it finds it is different, it changes its value.
353754. The smtp_printf() function is now made available to local_scan() so
3538 additional output lines can be written before returning. There is also an
3539 smtp_fflush() function to enable the detection of a dropped connection.
3540 The variables smtp_input and smtp_batched_input are exported to
3541 local_scan().
354355. Changed the default runtime configuration: the message "Unknown user"
3544 has been removed from the ACL, and instead placed on the localuser router,
3545 using the cannot_route_message feature. This means that any verification
3546 failures that generate their own messages won't get overridden. Similarly,
3547 the "Unrouteable address" message that was in the ACL for unverifiable
3548 relay addresses has also been removed.
355056. Added hosts_avoid_esmtp to the smtp transport.
355257. The exicyclog script was not checking for the esoteric option
3553 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3554 will work only if exicyclog is run under the appropriate euid.
355658. Following a discussion on the list, the rules by which Exim recognises line
3557 endings on incoming messages have been changed. The -dropcr and drop_cr
3558 options are now no-ops, retained only for backwards compatibility. The
3559 following line terminators are recognized: LF CRLF CR. However, special
3560 processing applies to CR:
3562 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3563 nor a local message in the state where . is a terminator.
3565 (ii) If a bare CR is encountered in a header line, an extra space is added
3566 after the line terminator so as not to end the header. The reasoning
3567 behind this is that bare CRs in header lines are most likely either
3568 to be mistakes, or people trying to play silly games.
357059. The size of a message, as listed by "-bp" or in the Exim monitor window,
3571 was being incorrectly given as 18 bytes larger than it should have been.
3572 This is a VOB (very old bug).
357460. This may never have affected anything current, but just in case it has:
3575 When the local host is found other than at the start of a list of hosts,
3576 the local host, those with the same MX, and any that follow, are discarded.
3577 When the list in question was part of a longer list of hosts, the following
3578 hosts (not currently being processed) were also being discarded. This no
3579 longer happens. I'm not sure if this situation could ever has previously
3580 arisen.
358261. Added the "/MX" feature to lists of hosts in the manualroute and query
3583 program routers.
358562. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3586 header. This is something that is recommended in a new Internet Draft, and
3587 is something that is documented as being done by Sendmail. There are two
3588 possible values. For messages generated by the autoreply transport, Exim
3589 adds:
3591 Auto-Submitted: auto-replied
3593 whereas for all other generated messages (e.g. bounces) it adds
3595 Auto-Submitted: auto-generated
359763. The "personal" condition in filters now includes a test for the
3598 Auto-Submitted: header. If it contains the string "auto-" the message it
3599 not considered personal.
360164. Added rcpt_include_affixes as a generic transport option.
360365. Added queue_only_override (default true).
360566. Added the syslog_duplication option.
360767. If what should have been the first header line of a message consisted of
3608 a space followed by a colon, Exim was mis-interpreting it as a header line.
3609 It isn't of course - it is syntactically invalid and should therefore be
3610 treated as the start of the message body. The misbehaviour could have
3611 caused a number of strange effects, including loss of data in subsequent
3612 header lines, and spool format errors.
361468. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3615 client host had authenticated. This control can now be exercised by an ACL
3616 for more flexibility.
361869. By default, callouts do not happen when testing with -bh. There is now a
3619 variant, -bhc, which does actually run the callout code, including
3620 consulting and updating the callout cache.
362270. Added support for saslauthd authentication, courtesy of Alexander
3623 Sabourenkov.
362571. If statvfs() failed on the spool or log directories while checking their
3626 size for availability, Exim confusingly gave the error "space shortage".
3627 Furthermore, in debugging mode it crashed with a floating point exception.
3628 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3629 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3630 serious problem, Exim now writes to the main and panic logs when this
3631 happens, with details of the failure. It then refuses to accept the
3632 incoming message, giving the message "spool directory problem" or "log
3633 directory problem" with a 421 code for SMTP messages.
363572. When Exim is about to re-exec itself, it ensures that the file descriptors
3636 0, 1, and 2 exist, because some OS complain for execs without them (see
3637 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3638 descriptors. However, the code omitted to check that the open succeeded,
3639 causing mysterious errors if for some reason the permissions on /dev/null
3640 got screwed. Now Exim writes a message to the main and panic logs, and
3641 bombs out if it can't open /dev/null.
364373. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3644 interact so that it is all more flexible. It is supposed to remain
3645 backwards compatible. Also added extra_local_interfaces.
364774. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3648 to bomb out with an assertion failure - to the client this appears as a
3649 connection drop. This problem occurs in the part of the code that was taken
3650 from the Samba project. Fortunately, the assertion is in a very simple
3651 function, so I have fixed this by reproducing the function inline in the
3652 one place where it is called, and arranging for authentication to fail
3653 instead of killing the process with assert().
365575. The SPA client code was not working when the server requested OEM rather
3656 than Unicode encoding.
365876. Added code to make require_files with a specific uid setting more usable in
3659 the case where statting the file as root fails - usually a non-root-mounted
3660 NFS file system. When this happens and the failure is EACCES, Exim now
3661 forks a subprocess and does the per-uid checking as the relevant uid.
366377. Added process_log_path.
366578. If log_file_path was not explicitly set, a setting of check_log_space or
3666 check_log_inodes was ignored.
366879. If a space check for the spool or log partitions fails, the incident is now
3669 logged. Of course, in the latter case the data may get lost...
367180. Added the %p formatting code to string_format() so that it can be used to
3672 print addresses in debug_print(). Adjusted all the address printing in the
3673 debugging in store.c to use %p rather than %d.
367581. There was a concern that a line of code in smtp_in.c could overflow a
3676 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3677 initially expressed, the concern was not well-founded, because trailing
3678 spaces are removed early. However, if the trailing spaces were followed by
3679 a NULL, they did not get removed, so the overflow was possible. Two fixes
3680 were applied:
3682 (a) I re-wrote the offending code in a cleaner fashion.
3683 (b) If an incoming SMTP command contains a NULL character, it is rejected
3684 as invalid.
368682. When Exim changes uid/gid to the Exim user at daemon start time, it now
3687 runs initgroups(), so that if the Exim user is in any additional groups,
3688 they will be used during message reception.
3691Exim version 4.20
3694The change log for 4.20 and earlier releases has been archived.