If a message is older than the "first failed" time when computing a
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
727071f8 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.289 2006/02/09 14:50:58 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
214e2000
PH
6Exim version 4.61
7-----------------
8
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.
16
f9daeae0
PH
17PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
19
7e66e54d
PH
20PH/03 Added disable_ipv6.
21
c8ea1597
PH
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.
28
911f6fde
PH
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.
31
47ca6d6c
PH
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.
37
ed0e9820
PH
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
41 127.0.0.2 (sic), which is no longer necessary.
42
eff37e47
PH
43PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
45
1921d2ea
PH
46PH/09 Moved a debug statement in filter processing to avoid a race problem when
47 testing.
48
b3f69ca8
JJ
49JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
51
52JJ/02 exipick: Added support for new ACL variable spool format introduced
53 in 4.61-PH/06
54
424a1c63
PH
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.
62
7a100415
PH
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.
66
19b9dc85
PH
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.
69
309bd837
PH
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.
74
59e82a2a
PH
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:
80
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.
84
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.
88
9edc04ce
PH
89PH/15 Minor change to Makefile for building test_host (undocumented testing
90 feature).
91
1349e1e5
PH
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.
100
ea49d0e1
PH
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.
104
064a94c9
PH
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.
108
727071f8
PH
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.
118
1349e1e5 119
214e2000 120
5de37277
PH
121Exim version 4.60
122-----------------
123
cc38ddbf
PH
124PH/01 Two changes to the default runtime configuration:
125
126 (1) Move the checks for relay_from_hosts and authenticated clients from
127 after to before the (commented out) DNS black list checks.
128
129 (2) Add control=submission to the relay_from_hosts and authenticated
130 clients checks, on the grounds that messages accepted by these
131 statements are most likely to be submissions.
5de37277 132
72fdd6ae
PH
133PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
134
135 (1) Generate an error if the third argument for the ${prvs expansion is
136 not a single digit.
137
138 (2) Treat a missing third argument of ${prvscheck as if it were an empty
139 string.
140
141 (3) Reset the variables that are obtained from the first argument of
142 ${prvscheck and used in the second argument before leaving the code,
143 because their memory is reclaimed, so using them afterwards may do
144 silly things.
145
146 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
147 one (it's much easier than Tom thought :-).
148
149 (5) Because of (4), we can now allow for the use of $prvscheck_result
150 inside the third argument.
cb9328de 151
cb741023
PH
152PH/03 For some reason, the default setting of PATH when running a command from
153 a pipe transport was just "/usr/bin". I have changed it to
154 "/bin:/usr/bin".
155
f174f16e
PH
156PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
157 anything to be listed in the output from -bV.
b2f5a032 158
c25242d7
PH
159PH/05 When a filter generated an autoreply, the entire To: header line was
160 quoted in the delivery log line, like this:
161
162 => >A.N.Other <ano@some.domain> <original@ddress> ...
163
164 This has been changed so that it extracts the operative address. There
165 may be more than one such address. If so, they are comma-separated, like
166 this:
167
168 => >ano@some.domain,ona@other.domain <original@ddress> ...
169
82c19f95
PH
170PH/06 When a client host used a correct literal IP address in a HELO or EHLO
171 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
172 not being looked up in the rDNS to get a host name, Exim was showing the
173 IP address twice in Received: lines, even though the IP addresses were
174 identical. For example:
175
176 Received: from [1.2.3.4] (helo=[1.2.3.4])
177
178 However, if the real host name was known, it was omitting the HELO data
179 if it matched the actual IP address. This has been tidied up so that it
180 doesn't show the same IP address twice.
181
d7ffbc12
PH
182PH/07 When both +timestamp and +memory debugging was on, the value given by
183 $tod_xxx expansions could be wrong, because the tod_stamp() function was
184 called by the debug printing, thereby overwriting the timestamp buffer.
185 Debugging no longer uses the tod_stamp() function when +timestamp is set.
186
9f526266
PH
187PH/08 When the original message was included in an autoreply transport, it
188 always said "this is a copy of the message, including all the headers",
189 even if body_only or headers_only was set. It now gives an appropriate
190 message.
191
87fcc8b9
PH
192PH/09 Applied a patch from the Sieve maintainer which:
193
194 o fixes some comments
195 o adds the (disabled) notify extension core
196 o adds some debug output for the result of if/elsif tests
197 o points to the current vacation draft in the documentation
198 and documents the missing references header update
199
200 and most important:
201
202 o fixes a bug in processing the envelope test (when testing
203 multiple envelope elements, the last element determinted the
204 result)
205
456682f5
PH
206PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
207 Electronic Mail") by including:
208
209 Auto-submitted: auto-generated
210
211 in the messages that it generates (bounce messages and others, such as
212 warnings). In the case of bounce messages for non-SMTP mesages, there was
213 also a typo: it was using "Auto_submitted" (underscore instead of
214 hyphen). Since every message generated by Exim is necessarily in response
215 to another message, thes have all been changed to:
216
217 Auto-Submitted: auto-replied
218
219 in accordance with these statements in the RFC:
220
221 The auto-replied keyword:
222
223 - SHOULD be used on messages sent in direct response to another
224 message by an automatic process,
225
226 - MUST NOT be used on manually-generated messages,
227
228 - MAY be used on Delivery Status Notifications (DSNs) and Message
229 Disposition Notifications (MDNs),
230
231 - MUST NOT be used on messages generated by automatic or periodic
232 processes, except for messages which are automatic responses to
233 other messages.
234
3e46c1aa
PH
235PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
236 to the default Received: header definition.
456682f5 237
49826d12
PH
238PH/12 Added log selector acl_warn_skipped (default on).
239
eba0c039
PH
240PH/13 After a successful wildlsearch lookup, discard the values of numeric
241 variables because (a) they are in the wrong storage pool and (b) even if
242 they were copied, it wouldn't work properly because of the caching.
243
a0d6ba8a
PH
244PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
245 checking when decoding. Apparently there are clients that generate
246 overlong encoded strings. Why am I not surprised?
247
f0917727
PH
248PH/15 If the first argument of "${if match_address" was not empty, but did not
249 contain an "@" character, Exim crashed. Now it writes a panic log message
250 and treats the condition as false.
251
096fee00
PH
252PH/16 In autoreply, treat an empty string for "once" the same as unset.
253
024bd3c2
PH
254PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
255 extension "envelope-auth". The code is finished and in agreement with
256 other implementations, but there is no documentation so far and in fact,
257 nobody wrote the draft yet. This extension is currently #undef'ed, thus
258 not changing the active code.
259
260 Print executed "if" and "elsif" statements when debugging is used. This
261 helps a great deal to understand what a filter does.
262
263 Document more things not specified clearly in RFC3028. I had all this
264 sorted out, when out of a sudden new issues came to my mind. Oops."
265
df199fec
PH
266PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
267 (Bugzilla #53).
268
d27f1df3
PH
269PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
270 canonical form (as documented). However, after a host name lookup from
271 the IP address, check_host() was doing a simple string comparison with
272 addresses acquired from the DNS when checking that the found name did
273 have the original IP as one of its addresses. Since any found IPv6
274 addresses are likely to be in abbreviated form, the comparison could
275 fail. Luckily, there already exists a function for doing the comparison
276 by converting both addresses to binary, so now that is used instead of
277 the text comparison.
278
96776534
PH
279PH/20 There was another similar case to PH/19, when a complete host name was
280 given in a host list; looking up its IP address could give an abbreviated
281 form, whereas the current host's name might or might not be abbreviated.
282 The same fix has been applied.
283
5de37277 284
9a799bc0
PH
285Exim version 4.54
286-----------------
287
288PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
289 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
290 It now does.
291
99a4b039
PH
292PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
293 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
294
295PH/03 Typo: missing ".o" in src/pcre/Makefile.
296
4b233853
PH
297PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
298 header line, restrict the check to what is listed in RFCs 2369 and 2929.
299 Also, for "Auto-Submitted", treat anything other than "no" as
300 non-personal, in accordance with RFC 3834. (Previously it treated
301 anything starting "auto-" as non-personal.)
302
8857ccfd
PH
303TF/01 The control=submission/name=... option had a problem with syntax
304 errors if the name included a slash character. The /name= option
305 now slurps the rest of the string, so it can include any characters
306 but it must come last in the list of options (after /sender_retain
307 or /domain=).
308
433a2980
PH
309PH/05 Some modifications to the interface to the fake nameserver for the new
310 testing suite.
311
3e46c1aa 312
9a799bc0 313
e3a311ba
TK
314Exim version 4.53
315-----------------
316
317TK/01 Added the "success_on_redirect" address verification option. See
318 NewStuff for rationale and an example.
319
13b685f9
PH
320PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
321
395ff96d
PH
322PH/02 Patch to exigrep to allow it to work on syslog lines.
323
5b68f6e4
PH
324PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
325 fread() to skip over the body file's header line, because in Cygwin the
326 header line is locked and is inaccessible.
327
1ab52c69
PH
328PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
329 co-exist for some time) to make it clear that it is the Exim ID that is
330 referenced, not the Message-ID: header line.
331
b07e6aa3
PH
332PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
333 string_format() function, because snprintf() does not exist on all
334 operating systems.
335
254e032f
PH
336PH/06 The use of forbid_filter_existstest now also locks out the use of the
337 ${stat: expansion item.
338
3af76a81
PH
339PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
340 protocol synchronization error", to keep the pedants happy.
341
2548ba04
PH
342PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
343 well as for IRIX systems, when gcc is being used. See the host.c source
344 file for comments.
345
b6c6011d
PH
346PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
347
cf39cf57
PH
348PH/10 Named domain lists were not working if used in a queue_smtp_domains
349 setting.
350
f1513293
PH
351PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
352 transport and to the smtp transport in LMTP mode.
353
727549a4
PH
354TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
355
af46795e
PH
356PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
357 run a filter in a subprocess. This could lead to confusion in subsequent
358 lookups in the parent process. There should also be a search_tidyup() at
359 the end of the subprocess.
360
d7b47fd0
PH
361PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
362 only if the host matched helo_try_verify_hosts, which caused the
363 verification to occur when the EHLO/HELO command was issued. The ACL just
364 tested the remembered result. Now, if a previous verification attempt has
365 not happened, "verify = helo" does it there and then.
366
ee744174
JJ
367JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
368
b582ab87
PH
369TK/03 Fix log output including CR from clamd.
370
41a13e0a
PH
371PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
372 exist provoked a memory error which could cause a segfault.
373
f625cc5a
PH
374PH/15 Installed PCRE 6.2
375
376PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
377
21f7af35
PH
378PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
379 of the problem. Specifically, suggested +O2 rather than +O1 for the
380 HP-UX compiler.
381
31480e42
PH
382PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
383
2d280592
PH
384PH/20 If a delivery was routed to a non-standard port by means of an SRV
385 record, the port was not correctly logged when the outgoing_port log
386 selector was set (it logged the transort's default port).
387
7cd1141b
PH
388PH/21 Added support for host-specific ports to manualroute, queryprogram,
389 fallback_hosts, and "hosts" in the smtp transport.
390
391PH/22 If the log selector "outgoing_port" is set, the port is now also given on
392 host errors such as "Connection refused".
393
750af86e
PH
394PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
395 authentication with radiusclient 0.4.9:
396
397 - Error returned from rc_read_config was caught wrongly
398 - Username/password not passed on to radius server due to wrong length.
399
400 The presumption is that some radiusclient API changes for 4.51/PH/17
401 were not taken care of correctly. The code is still untested by me (my
402 Linux distribution still has 0.3.2 of radiusclient), but it was
403 contributed by a Radius user.
404
405PH/24 When doing a callout, the value of $domain wasn't set correctly when
406 expanding the "port" option of the smtp transport.
407
4304270b
TK
408TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
409 while reading a MIME header. Thanks to Tom Hughes for a patch.
410
750af86e
PH
411PH/24 Include config.h inside local_scan.h so that configuration settings are
412 available.
413
64ffc24f
PH
414PH/25 Make $smtp_command_argument available after all SMTP commands. This means
415 that in an ACL for RCPT (for example), you can examine exactly what was
416 received.
417
5dd9625b
PH
418PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
419 commands, but it was not correctly comparing the address with the actual
420 client host address. Thus, it would show the EHLO address in Received:
421 header lines when this was not necessary.
422
5591031b
PH
423PH/27 Added the % operator to ${eval:}.
424
ba18e66a
PH
425PH/28 Exim tries to create and chdir to its spool directory when it starts;
426 it should be ignoring failures (because with -C, for example, it has lost
427 privilege). It wasn't ignoring creation failures other than "already
428 exists".
429
9cec981f
PH
430PH/29 Added "crypteq" to the list of supported features that Exim outputs when
431 -bV or -d is used.
432
aa2b5c79
PH
433PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
434 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
435 too many continuations, the temporary file was not being removed, and the
436 return code was incorrect.
aa2b5c79 437
48a53b7f
PH
438PH/31 Missing "BOOL" in function definition in filtertest.c.
439
1c59d63b
PH
440PH/32 Applied Sieve patches from the maintainer.
441
671012da
TK
442TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
443
1509d3a8
PH
444PH/33 Added "verify = not_blind".
445
446PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
447 Local/Makefile (with some defaults set). These are used in built scripts
448 such as exicyclog, but they have never been used in the exim_install
449 script (though there are many overriding facilities there). I have
450 arranged that the exim_install script now takes note of these two
451 settings.
452
453PH/35 Installed configuration files for Dragonfly.
454
2fe1a124
PH
455PH/36 When a locally submitted message by a trusted user did not contain a
456 From: header, and the sender address was obtained from -f or from an SMTP
457 MAIL command, and the trusted user did not use -F to supply a sender
458 name, $originator_name was incorrectly used when constructing a From:
459 header. Furthermore, $originator_name was used for submission mode
460 messages from external hosts without From: headers in a similar way,
461 which is clearly wrong.
462
8800895a
PH
463PH/37 Added control=suppress_local_fixups.
464
ccfdb010
PH
465PH/38 When log_selector = +received_sender was set, and the addition of the
466 sender made the log line's construction buffer exactly full, or one byte
467 less than full, an overflow happened when the terminating "\n" was
468 subsequently added.
469
1130bfb0
PH
470PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
471 when the result of a list match is failure because a DNS lookup failed.
472
ebcb507f
PH
473PH/40 RM_COMMAND is now used in the building process.
474
c35e155c
PH
475PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
476 the "build-* directories that it finds.
477
95d1f782
PH
478PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
479 address in a domain literal was a prefix of an interface address.
480
fd6de02e
PH
481PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
482 when verifying a sender address, unless rewrite_headers is false.
483
58de37c5
PH
484PH/44 Wrote a long comment about why errors_to addresses are verified as
485 recipients, not senders.
486
261cf466
TF
487TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
488 the ratelimit ACL was added.
489
3ee512ff
PH
490PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
491
e08c430f
PH
492PH/46 Added extra information about PostgreSQL errors to the error string.
493
bef5a11f
PH
494PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
495 avoiding the need to install special zones in a real server. This is
496 backwards compatible; if it can't find the fake resolver, it drops back.
497 Thus, both old and new test suites can be run.
498
7546de58
TF
499TF/02 Added util/ratelimit.pl
500
e5d5a95f
TF
501TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
502 clock is set back in time.
503
2e88a017
TF
504TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
505 Candler <B.Candler@pobox.com>.
506
a5f65aa4
TF
507TF/05 The fix for PH/43 was not completely correct; widen_domains is always
508 OK for addresses that are the result of redirections.
509
e7726cbf
PH
510PH/48 A number of further additions for the benefit of the new test suite,
511 including a fake gethostbyname() that interfaces to the fake DNS resolver
512 (see PH/47 above).
513
a7fdad5b
TF
514TF/06 The fix for widen_domains has also been applied to qualify_single and
515 search_parents which are the other dnslookup options that can cause
516 header rewrites.
517
6af56900
PH
518PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
519 type ("H").
520
0925ede6
PH
521PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
522
66afa403
TF
523TF/07 Exim produced the error message "an SRV record indicated no SMTP
524 service" if it encountered an MX record with an empty target hostname.
525 The message is now "an MX or SRV record indicated no SMTP service".
526
0154e85a
TF
527TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
528 if the DNS of the sending site is misconfigured. This is quite a
529 common situation. This change restores the behaviour of treating a
530 helo verification defer as a failure.
531
16f12c76
PH
532PH/51 If self=fail was set on a router, the bounce message did not include the
533 actual error message.
534
bbe902f0 535
e5a9dba6
PH
536Exim version 4.52
537-----------------
538
539TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
540
22c3b60b
PH
541PH/01 When a transport filter timed out in a pipe delivery, and the pipe
542 command itself ended in error, the underlying message about the transport
543 filter timeout was being overwritten with the pipe command error. Now the
544 underlying error message should be appended to the second error message.
545
06a9b4b5
PH
546TK/01 Fix poll() being unavailable on Mac OSX 10.2.
547
c1ac6996
PH
548PH/02 Reduce the amount of output that "make" produces by default. Full output
549 can still be requested.
550
9c7a242c
PH
551PH/03 The warning log line about a condition test deferring for a "warn" verb
552 was being output only once per connection, rather than after each
553 occurrence (because it was using the same function as for successful
554 "warn" verbs). This seems wrong, so I have changed it.
555
87ba3f5f
PH
556TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
557 it should not have, which might have caused a crash in the right
558 circumstances, but probably never did.
559
560PH/04 Installed a modified version of Tony Finch's patch to make submission
561 mode fix the return path as well as the Sender: header line, and to
562 add a /name= option so that you can make the user's friendly name appear
563 in the header line.
564
29aba418
TF
565TF/03 Added the control = fakedefer ACL modifier.
566
fe0dab11
TF
567TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
568 Mark Lowes for thorough testing.
870f6ba8 569
11d337a4
TK
570TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
571
572TK/03 Merged latest SRS patch from Miles Wilton.
573
415c8f3b
PH
574PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
575 with the definition in sysexits.h (which is #included earlier).
576 Fortunately, Exim does not actually use EX_OK. The code used to try to
577 preserve the sysexits.h value, by assumimg that macro definitions were
578 scanned for macro replacements. I have been disabused of this notion,
579 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 580
958541e9
PH
581PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
582 in the smtp transport. When a block could not be written in a single
583 write() function, the timeout was being re-applied to each part-write.
584 This seems wrong - if the receiver was accepting one byte at a time it
585 would take for ever. The timeout is now adjusted when this happens. It
586 doesn't have to be particularly precise.
587
c206415f
TK
588TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
589 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
590
2a4be8f9
PH
591PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
592 without a domain if the check to <postmaster@domain> fails.
593
1cba11c5
SC
594SC/01 Eximstats: added -xls and the ability to specify output files
595 (patch written by Frank Heydlauf).
596
597SC/02 Eximstats: use FileHandles for outputing results.
598
599SC/03 Eximstats: allow any combination of xls, txt, and html output.
600
601SC/04 Eximstats: fixed display of large numbers with -nvr option
602
603SC/05 Eximstats: fixed merging of reports with empty tables.
604
605SC/06 Eximstats: added the -include_original_destination flag
606
607SC/07 Eximstats: removed tabs and trailing whitespace.
608
1005d00e
TK
609TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
610
611TK/06 MBOX spool code: Add real "From " MBOX separator line
612 so the .eml file is really in mbox format (even though
613 most programs do not really care). Patch from Alex Miller.
614
615TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
616 The latter is generated from $received_to and is only set if the
617 message has one envelope recipient. SA can use these headers,
618 obviously out-of-the-box. Patch from Alex Miller.
619
9b4768fa
PH
620PH/08 The ${def test on a variable was returning false if the variable's
621 value was "0", contrary to what the specification has always said!
622 The result should be true unless the variable is empty.
623
624PH/09 The syntax error of a character other than { following "${if
625 def:variable_name" (after optional whitespace) was not being diagnosed.
626 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
627 accidental colon was present, for example, could give incorrect results.
628
0d7eb84a
PH
629PH/10 Tidied the code in a number of places where the st_size field of a stat()
630 result is used (not including appendfile, where other changes are about
631 to be made).
632
633PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
634 This involved changing a lot of size variables from int to off_t. It
635 should work with maildirs and everything.
636
40727bee
TK
637TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
638 spamd dying while we are connected to it.
639
554d2369
TF
640TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
641 <jgh@wizmail.org>
642
1f922db1
PH
643PH/12 Applied Alex Kiernan's patch for the API change for the error callback
644 function for BDB 4.3.
645
ef213c3b
PH
646PH/13 Changed auto_thaw such that it does not apply to bounce messages.
647
8ac170f3
PH
648PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
649 the sources for PCRE have been re-arranged and more files are now
650 involved.
651
b1c749bb
PH
652PH/15 The code I had for printing potentially long long variables in PH/11
653 above was not the best (it lost precision). The length of off_t variables
654 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
655 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
656 to be "long long int" or "long int". This is needed for the internal
657 formatting function string_vformat().
b1c749bb 658
4aac9b49
PH
659PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
660 the configuration file to be ":syslog", then the script "guesses" where
661 the logs files are, rather than using the compiled in default. In our
662 case the guess is not the same as the compiled default, so the script
663 suddenly stopped working when I started to use syslog. The patch checks
664 to see if log_file_path is "". If so, it attempts to read it from exim
665 with no configuration file to get the compiled in version, before it
666 falls back to the previous guessing code."
667
294520c8
TK
668TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
669 implementing BATV in an Exim configuration. See NewStuff for the gory
670 details.
671
5bd022fe
PH
672PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
673 Makefile that are specific to HP-UX.
674
90e9ce59
PH
675PH/18 If the "use_postmaster" option was set for a recipient callout together
676 with the "random" option, the postmaster address was used as the MAIL
677 FROM address for the random test, but not for the subsequent recipient
678 test. It is now used for both.
679
5ea81592
PH
680PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
681 patch removes a few documentation additions to RFC 3028, because the
682 latest draft now contains them. It adds the new en;ascii-case comparator
683 and a new error check for 8bit text in MIME parts. Comparator and
684 require names are now matched exactly. I enabled the subaddress
685 extension, but it is not well tested yet (read: it works for me)."
686
c6c2dc1d
PH
687PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
688 rework some of the code of TK/09 above to avoid the hardwired use of
689 "%lld" and "long long". Replaced the call to snprintf() with a call to
690 string_vformat().
691
fffffe4c
PH
692PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
693 records point to non-existent hosts", "retry timeout exceeded", and
694 "retry time not reached for any host after a long failure period".
ca02eafb 695
9a26b6b2
PH
696PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
697 experimental DomainKeys support:
698
699 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
700 (2) On an error such as an illegally used "control", the wrong name for
701 the control was given.
702
703 These problems did NOT occur unless DomainKeys support was compiled.
704
4aee0225
PH
705PH/23 Added daemon_startup_retries and daemon_startup_sleep.
706
32d668a5
PH
707PH/24 Added ${if match_ip condition.
708
8187c3f3
PH
709PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
710 databases so that it will be absolutely obvious if a crash occurs in the
711 DB library. This is a regular occurrence (often caused by mis-matched
712 db.h files).
713
ff790e47 714PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
715 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
716 picked up on a user's system that detects such things. There doesn't seem
717 to be a gcc warning option for this - only an attribute that has to be
718 put on the function's prototype. It seems that in Fedora Core 4 they have
719 set this on a number of new functions. No doubt there will be more in due
720 course.
ff790e47 721
5417f6d1
PH
722PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
723 specify a transport. However, if an address that was verified by such a
724 router was the subject of a callout, Exim crashed because it tried to
725 read the rcpt_include_affixes from the non-existent transport. Now it
726 just assumes that the setting of that option is false. This bug was
727 introduced by 4.51/PH/31.
728
59cf8544
PH
729PH/28 Changed -d+all to exclude +memory, because that information is very
730 rarely of interest, but it makes the output a lot bigger. People tend to
731 do -d+all out of habit.
732
e7ad8a65
PH
733PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
734 code in os-type was giving problems when libc.so lives in lib64, like on
735 x86_64 Fedora Core.
736
ade42478
PH
737PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
738 aren't the modern standard, and it seems that some systems' include files
739 don't always have them. Exim was already checking for some of the newer
740 ones like T_AAAA, and defining it itself. I've added checks for all the
741 record types that Exim uses.
742
182ad5cf
PH
743PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
744 not automatically generating a new one, as it is supposed to. This
745 prevented TLS from working. If the file did exist, but contained invalid
746 data, a new version was generated, as expected. It was only the case of a
747 non-existent file that was broken.
748
b0d9fc80
TK
749TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
750 with a change in libdomainkeys > 0.64.
751
752TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
753 from DNS. If the selector record carries the flag, it now has
754 precedence over the domain-wide flag.
755
756TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
757
47c7a64a
PH
758PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
759 the use of a port name that isn't defined in /etc/services) occurred, the
760 message was deferred as in a normal delivery, and thus remained on the
761 spool, instead of being failed because of the mua_wrapper setting. This
762 is now fixed, and I tidied up some of the mua_wrapper messages at the
763 same time.
764
a388bce4
SC
765SC/08 Eximstats: whilst parsing the mainlog(s), store information about
766 the messages in a hash of arrays rather than using individual hashes.
767 This is a bit cleaner and results in dramatic memory savings, albeit
768 at a slight CPU cost.
769
770SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
771 as requested by Marc Sherman.
772
773SC/10 Eximstats: added histograms for user specified patterns as requested
774 by Marc Sherman.
775
0793e4ed
SC
776SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
777
c58b88df
PH
778PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
779 fopen() in the content-scanning modules that did not already have it.
780
e7ad8a65 781
7982096b
PH
782Exim version 4.51
783-----------------
784
1a46a8c5
PH
785TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
786 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
787
2f079f46 788TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
789
790TK/03 Fix ACL "regex" condition not being available in MIME ACL.
791
792PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
793 to test Sieve filters that use "vacation".
794
795PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
796 that changes the way the GnuTLS parameters are stored in the cache file.
797 The new format can be generated externally. For backward compatibility,
798 if the data in the cache doesn't make sense, Exim assumes it has read an
799 old-format file, and it generates new data and writes a new file. This
800 means that you can't go back to an older release without removing the
801 file.
802
803PH/03 A redirect router that has both "unseen" and "one_time" set does not
804 work if there are any delivery delays because "one_time" forces the
805 parent to be marked "delivered", so its unseen clone is never tried
806 again. For this reason, Exim now forbids the simultaneous setting of
807 these two options.
808
809PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
810 redirected to themselves ("homonym" addresses). Read the long ChangeLog
811 entry if you want to know the details. The fix, however, neglected to
812 consider the case when local delivery batching is involved. The test for
813 "previously delivered" was not happening when checking to see if an
814 address could be batched with a previous (undelivered) one; under
815 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 816 address.
1a46a8c5
PH
817
818PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
819 in its include files, and this causes problems building Exim.
820
821PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
822 header_syntax) but Exim was just ignoring anything given after a slash.
823 In particular, this caused confusion with an attempt to use "verify =
824 reverse_host_lookup/defer_ok". An error is now given when options are
825 supplied for verify items that do not have them. (Maybe reverse_host_
826 lookup should have a defer_ok option, but that's a different point.)
827
828PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
829 defined by RFC 821) to 2048, because there were problems with some AUTH
830 commands, and RFC 1869 says the size should be increased for extended
831 SMTP commands that take arguments.
832
833PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
834 Finch).
835
836PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
837 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 838
49c2d5ea
PH
839PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
840 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
841 whatever). Otherwise the password may appear in the log. Following change
842 PH/42 below, there is no longer a chance of it appearing in a bounce
843 message.
49c2d5ea 844
bf759a8b
PH
845PH/11 Installed exipick version 20050225.0 from John Jetmore.
846
83364d30
PH
847PH/12 If the last host in a fallback_hosts list was multihomed, only the first
848 of its addresses was ever tried. (Bugzilla bug #2.)
849
7999bbd7
PH
850PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
851 the result incorrectly in the debug output. (It correctly added a newline
852 to what was transported.)
853
7dbf77c9
PH
854TF/01 Added $received_time.
855
74e0617f
PH
856PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
857 commented out examples of how to interface to a virus scanner and to
858 SpamAssassin. Also added commented examples of av_scanner and
859 spamd_address settings.
860
2f079f46
PH
861PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
862 and controls are allowed in which ACLs. There were a couple of minor
863 errors. Some of the entries in the conditions table (which is a table of
864 where they are NOT allowed) were getting very unwieldy; rewrote them as a
865 negation of where the condition IS allowed.
866
8c841523
PH
867PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
868
7766a4f0
PH
869PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
870 header file does not have a version number, so I've had to invent a new
871 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
872 API. The code is untested by me (my Linux distribution still has 0.3.2 of
873 radiusclient), but it was contributed by a Radius user.
874
8b417f2c
PH
875PH/18 Installed Lars Mainka's patch for the support of CRL collections in
876 files or directories, for OpenSSL.
877
901f42cb
PH
878PH/19 When an Exim process that is running as root has to create an Exim log
879 file, it does so in a subprocess that runs as exim:exim so as to get the
880 ownership right at creation (otherwise, other Exim processes might see
881 the file with the wrong ownership). There was no test for failure of this
882 fork() call, which would lead to the process getting stuck as it waited
883 for a non-existent subprocess. Forks do occasionally fail when resources
884 run out. I reviewed all the other calls to fork(); they all seem to check
885 for failure.
886
f9b9210e
PH
887PH/20 When checking for unexpected SMTP input at connect time (before writing
888 the banner), Exim was not dealing correctly with a non-positive return
889 from the read() function. If the client had disconnected by this time,
890 the result was a log entry for a synchronization error with an empty
891 string after "input=" when read() returned zero. If read() returned -1
892 (an event I could not check), uninitialized data bytes were printed.
893 There were reports of junk text (parts of files, etc) appearing after
894 "input=".
895
54cdb463
PH
896PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
897
cf00dad6
PH
898PH/22 Added support for macro redefinition, and (re)definition in between
899 driver and ACL definitions.
900
acb1b346
PH
901PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
902 forgetting to use the resulting value; it was using the unexpanded value.
903
c5ddb310
PH
904PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
905 hadn't been configured. The fix is from Juergen Kreileder, who
906 understands it better than I do:
907
908 "Here's what I see happening with three configured cyrus_sasl
909 authenticators configured (plain, login, cram-md5):
910
911 On startup auth_cyrus_sasl_init() gets called for each of these.
912 This means three calls to sasl_listmech() without a specified mech_list.
913 => SASL tests which mechs of all available mechs actually work
914 => three warnings about OTP not working
915 => the returned list contains: plain, login, cram-md5, digest-md5, ...
916
917 With the patch, sasl_listmech() also gets called three times. But now
918 SASL's mech_list option is set to the server_mech specified in the the
919 authenticator. Or in other words, the answer from sasl_listmech()
920 gets limited to just the mech you're testing for (which is different
921 for each call.)
922 => the return list contains just 'plain' or 'login', 'cram-md5' or
923 nothing depending on the value of ob->server_mech.
924
925 I've just tested the patch: Authentication still works fine,
926 unavailable mechs specified in the exim configuration are still
927 caught, and the auth.log warnings about OTP are gone."
928
31619da6
PH
929PH/25 When debugging is enabled, the contents of the command line are added
930 to the debugging output, even when log_selector=+arguments is not
931 specified.
932
bebaf0fc
PH
933PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
934 answer is "GNU", and only if the return is "GNU/something" is the answer
935 "Linux".
936
475fe28a
PH
937PH/27 $acl_verify_message is now set immediately after the failure of a
938 verification in an ACL, and so is available in subsequent modifiers. In
939 particular, the message can be preserved by coding like this:
940
941 warn !verify = sender
942 set acl_m0 = $acl_verify_message
943
944 Previously, $acl_verify_message was set only while expanding "message"
945 and "log_message" when a very denied access.
946
7e8bec7a
PH
947PH/28 Modified OS/os.c-Linux with
948
949 -#ifndef OS_LOAD_AVERAGE
950 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
951
952 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
953 nomenclature these days.)
954
e4a89c47
PH
955PH/29 Installed patch from the Sieve maintainer that adds the options
956 sieve_useraddress and sieve_subaddress to the redirect router.
957
5ca2a9a1
PH
958PH/30 In these circumstances:
959 . Two addresses routed to the same list of hosts;
960 . First host does not offer TLS;
961 . First host accepts first address;
962 . First host gives temporary error to second address;
963 . Second host offers TLS and a TLS session is established;
964 . Second host accepts second address.
965 Exim incorrectly logged both deliveries with the TLS parameters (cipher
966 and peerdn, if requested) that were in fact used only for the second
967 address.
7e8bec7a 968
c688b954
PH
969PH/31 When doing a callout as part of verifying an address, Exim was not paying
970 attention to any local part prefix or suffix that was matched by the
971 router that accepted the address. It now behaves in the same way as it
972 does for delivery: the affixes are removed from the local part unless
973 rcpt_include_affixes is set on the transport.
974
fed77020
PH
975PH/32 Add the sender address, as F=<...>, to the log line when logging a
976 timeout during the DATA phase of an incoming message.
977
7fe1560f
PH
978PH/33 Sieve envelope tests were broken for match types other than :is. I have
979 applied a patch sanctioned by the Sieve maintainer.
c688b954 980
ebb6e6d5
PH
981PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
982 the uid or gid is negative. A case of a negative gid caused this to be
983 noticed. The fix allows for either to be negative.
984
9c4e8f60
PH
985PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
986 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
987 overlooked.
988
989PH/36 The change PH/12 above was broken. Fixed it.
990
d7174846
PH
991PH/37 Exim used to check for duplicate addresses in the middle of routing, on
992 the grounds that routing the same address twice would always produce the
993 same answer. This might have been true once, but it is certainly no
994 longer true now. Routing a child address may depend on the previous
995 routing that produced that child. Some complicated redirection strategies
996 went wrong when messages had multiple recipients, and made Exim's
997 behaviour dependent on the order in which the addresses were given.
998
999 I have moved the duplicate checking until after the routing is complete.
1000 Exim scans the addresses that are assigned to local and remote
1001 transports, and removes any duplicates. This means that more work will be
1002 done, as duplicates will always all be routed, but duplicates are
1003 presumably rare, so I don't expect this is of any significance.
1004
1005 For deliveries to pipes, files, and autoreplies, the duplicate checking
1006 still happens during the routing process, since they are not going to be
1007 routed further.
1008
cfe75fc3
PH
1009PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1010 It corrects a timeout issue with spamd. This is Ian's comment: "The
1011 background is that sometimes spamd either never reads data from a
1012 connection it has accepted, or it never writes response data. The exiscan
1013 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1014 blindly assumes that writes won't block so it may never time out."
1015
be22d70e
PH
1016PH/39 Allow G after quota size as well as K and M.
1017
0612b098
PH
1018PH/40 The value set for $authenticated_id in an authenticator may not contain
1019 binary zeroes or newlines because the value is written to log lines and
1020 to spool files. There was no check on this. Now the value is run through
1021 the string_printing() function so that such characters are converted to
1022 printable escape sequences.
1023
2e0c1448
PH
1024PH/41 $message_linecount is a new variable that contains the total number of
1025 lines in the message. Compare $body_linecount, which is the count for the
1026 body only.
1027
447d236c
PH
1028PH/42 Exim no longer gives details of delivery errors for specific addresses in
1029 bounce and delay warning messages, except in certain special cases, which
1030 are as follows:
1031
1032 (a) An SMTP error message from a remote host;
1033 (b) A message specified in a :fail: redirection;
1034 (c) A message specified in a "fail" command in a system filter;
1035 (d) A message specified in a FAIL return from the queryprogram router;
1036 (e) A message specified by the cannot_route_message router option.
1037
1038 In these cases only, Exim does include the error details in bounce and
1039 warning messages. There are also a few cases where bland messages such
1040 as "unrouteable address" or "local delivery error" are given.
1041
d20976dc
PH
1042PH/43 $value is now also set for the "else" part of a ${run expansion.
1043
f656d135
PH
1044PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1045 being worked on, but at least Exim now implements the latest version to
1046 play with."
1047
2e2a30b4
PH
1048PH/45 In a pipe transport, although a timeout while waiting for the pipe
1049 process to complete was treated as a delivery failure, a timeout while
1050 writing the message to the pipe was logged, but erroneously treated as a
1051 successful delivery. Such timeouts include transport filter timeouts. For
1052 consistency with the overall process timeout, these timeouts are now
1053 treated as errors, giving rise to delivery failures by default. However,
1054 there is now a new Boolean option for the pipe transport called
1055 timeout_defer, which, if set TRUE, converts the failures into defers for
1056 both kinds of timeout. A transport filter timeout is now identified in
1057 the log output.
1058
9176e9f0
PH
1059PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1060 systems where "make" and "gmake" are different, calling "gmake" at top
1061 level broke things. I've arranged for the value of $(MAKE) to be passed
1062 from the Makefile to this script so that it can call the same version of
1063 "make".
1064
7982096b 1065
bbe902f0
PH
1066A note about Exim versions 4.44 and 4.50
1067----------------------------------------
1068
1069Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1070changes of various kinds. As a consequence, a big documentation update was
1071needed. This delayed the release for rather longer than seemed good, especially
1072in the light of a couple of (minor) security issues. Therefore, the changes
1073that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1074release. So 4.44 and 4.50 are in effect two different branches that both start
1075from 4.43.
1076
1077I have left the 4.50 change log unchanged; it contains all the changes since
10784.43. The change log for 4.44 is below; many of its items are identical to
1079those for 4.50. This seems to be the most sensible way to preserve the
1080historical information.
1081
1082
f7b63901 1083Exim version 4.50
495ae4b0
PH
1084-----------------
1085
5fe762f6
PH
1086 1. Minor wording change to the doc/README.SIEVE file.
1087
139059f6 1088 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1089 computation of the current number of files was incorrect.
495ae4b0 1090
7086e875
PH
1091 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1092 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1093 place.
1094
35af9f61
PH
1095 4. Give more explanation in the error message when the command for a transport
1096 filter fails to execute.
1097
b668c215
PH
1098 5. There are several places where Exim runs a non-Exim command in a
1099 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1100 was being done only for the command run by the queryprogram router. It is
1101 now done for all such subprocesses. The other cases are: ${run, transport
1102 filters, and the commands run by the lmtp and pipe transports.
1103
a494b1e1
PH
1104 6. Added CONFIGURE_GROUP build-time option.
1105
1106 7. Some older OS have a limit of 256 on the maximum number of file
1107 descriptors. Exim was using setrlimit() to set 1000 as a large value
1108 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1109 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1110
c5fcb476
PH
1111 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1112 was an oversight, and furthermore, ever since the addition of extra
1113 controls (e.g. 4.43/32), the checks on when to allow different forms of
1114 "control" were broken. There should now be diagnostics for all cases when a
1115 control that does not make sense is encountered.
1116
69358f02
PH
1117 9. Added the /retain_sender option to "control=submission".
1118
5be20824
PH
111910. $recipients is now available in the predata ACL (oversight).
1120
eb2c0248
PH
112111. Tidy the search cache before the fork to do a delivery from a message
1122 received from the command line. Otherwise the child will trigger a lookup
1123 failure and thereby defer the delivery if it tries to use (for example) a
1124 cached ldap connection that the parent has called unbind on.
1125
2a3eea10
PH
112612. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1127 of $address_data from the recipient verification was clobbered by the
1128 sender verification.
1129
113013. The value of address_data from a sender verification is now available in
1131 $sender_address_data in subsequent conditions in the ACL statement.
1132
23c7ff99
PH
113314. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1134
4deaf07d
PH
113515. Added a new option "connect=<time>" to callout options, to set a different
1136 connection timeout.
1137
926e1192
PH
113816. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1139 was its contents. (It was OK if the option was not defined at all.)
1140
650edc6f
PH
114117. A "Completed" log line is now written for messages that are removed from
1142 the spool by the -Mrm option.
1143
2c7db3f5
PH
114418. New variables $sender_verify_failure and $recipient_verify_failure contain
1145 information about exactly what failed.
1146
3d235903
PH
114719. Added -dd to debug only the daemon process.
1148
7c7ad977
PH
114920. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1150 handles timeouts, both on the server side and network timeouts. Renamed the
1151 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1152
981756db
PH
115321. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1154 It is now set to "smtps".
1155
d4eb88df
PH
115622. $host_address is now set to the target address during the checking of
1157 ignore_target_hosts.
1158
115923. When checking ignore_target_hosts for an ipliteral router, no host name was
1160 being passed; this would have caused $sender_host_name to have been used if
1161 matching the list had actually called for a host name (not very likely,
1162 since this list is usually IP addresses). A host name is now passed as
1163 "[x.x.x.x]".
1164
7d468ab8
PH
116524. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1166 code that specifies a non-restarting handler (typically sigaction() in
1167 modern systems) in an attempt to fix a rare and obscure crash bug.
1168
116925. Narrowed the window for a race in the daemon that could cause it to ignore
1170 SIGCHLD signals. This is not a major problem, because they are used only to
1171 wake it up if nothing else does.
1172
62c0818f
PH
117326. A malformed maildirsize file could cause Exim to calculate negative values
1174 for the mailbox size or file count. Odd effects could occur as a result.
1175 The maildirsize information is now recalculated if the size or filecount
1176 end up negative.
1177
26034054
PH
117827. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1179 support for a long time. Removed HAVE_SYS_VFS_H.
1180
af66f652
PH
118128. Installed the latest version of exipick from John Jetmore.
1182
90af77f4
PH
118329. In an address list, if the pattern was not a regular expression, an empty
1184 subject address (from a bounce message) matched only if the pattern was an
1185 empty string. Non-empty patterns were not even tested. This was the wrong
1186 because it is perfectly reasonable to use an empty address as part of a
1187 database query. An empty address is now tested by patterns that are
1188 lookups. However, all the other forms of pattern expect the subject to
1189 contain a local part and a domain, and therefore, for them, an empty
1190 address still always fails if the pattern is not itself empty.
1191
d8ef3577
PH
119230. Exim went into a mad DNS loop when attempting to do a callout where the
1193 host was specified on an smtp transport, and looking it up yielded more
1194 than one IP address.
1195
5cb8cbc6
PH
119631. Re-factored the code for checking spool and log partition space into a
1197 function that finds that data and another that does the check. The former
1198 is then used to implement four new variables: $spool_space, $log_space,
1199 $spool_inodes, and $log_inodes.
1200
14702f5b
PH
120132. The RFC2047 encoding function was originally intended for short strings
1202 such as real names; it was not keeping to the 75-character limit for
1203 encoded words that the RFC imposes. It now respects the limit, and
1204 generates multiple encoded words if necessary. To be on the safe side, I
1205 have increased the buffer size for the ${rfc2047: expansion operator from
1206 1024 to 2048 bytes.
1207
063b1e99
PH
120833. It is now permitted to omit both strings after an "if" condition; if the
1209 condition is true, the result is "true". As before, when the second string
1210 is omitted, a false condition yields an empty string. This makes it less
1211 cumbersome to write custom ACL and router conditions.
1212
652e1b65
PH
121334. Failure to deliver a bounce message always caused it to be frozen, even if
1214 there was an errors_to setting on the router. The errors_to setting is now
1215 respected.
1216
6f0c9a4f
PH
121735. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1218 canonical form (fully expanded) before being placed in
1219 $sender_host_address.
1220
33397d19
PH
122136. The table in the code that translates DNS record types into text (T_A to
1222 "A" for instance) was missing entries for NS and CNAME. It is just possible
1223 that this could have caused confusion if both these types were looked up
1224 for the same domain, because the text type is used as part of Exim's
1225 per-process caching. But the chance of anyone hitting this buglet seems
1226 very small.
1227
7bb56e1f
PH
122837. The dnsdb lookup has been extended in a number of ways.
1229
1230 (1) There is a new type, "zns", which walks up the domain tree until it
1231 finds some nameserver records. It should be used with care.
1232
ea3bc19b
PH
1233 (2) There is a new type, "mxh", which is like "mx" except that it returns
1234 just the host names, not the priorities.
1235
1236 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1237 looked up. The behaviour when one of the lookups defers can be
1238 controlled by a keyword.
7bb56e1f 1239
ea3bc19b 1240 (4) It is now possible to specify the separator character for use when
7bb56e1f 1241 multiple records are returned.
33397d19 1242
0bcb2a0e
PH
124338. The dnslists ACL condition has been extended: it is now possible to supply
1244 a list of IP addresses and/or domains to be looked up in a particular DNS
1245 domain.
1246
2ac0e484
PH
124739. Added log_selector=+queue_time_overall.
1248
4e1fde53
PH
124940. When running the queue in the test harness, wait just a tad after forking a
1250 delivery process, to get repeatability of debugging output.
1251
de365ded
PH
125241. Include certificate and key file names in error message when GnuTLS fails
1253 to set them up, because the GnuTLS error message doesn't include the name
1254 of the failing file when there is a problem reading it.
1255
f05da2e8
PH
125642. Allow both -bf and -bF in the same test run.
1257
d6453af2
PH
125843. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1259
f7b63901
PH
126044. The "Exiscan patch" is now merged into the mainline Exim source.
1261
126245. Sometimes the final signoff response after QUIT could fail to get
1263 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1264 < 0 before doing a fflush(). This bug looks as though it goes back to the
1265 introduction of TLS in release 3.20, but "sometimes" must have been rare
1266 because the tests only now provoked it.
1267
a444213a
PH
126846. Reset the locale to "C" after calling embedded Perl, in case it was changed
1269 (this can affect the format of dates).
1270
0ec020ea
PH
127147. exim_tidydb, when checking for the continued existence of a message for
1272 which it has found a message-specific retry record, was not finding
1273 messages that were in split spool directories. Consequently, it was
1274 deleting retry records that should have stayed in existence.
1275
b1206957
PH
127648. Steve fixed some bugs in eximstats.
1277
127849. The SPA authentication driver was not abandoning authentication and moving
1279 on to the next authenticator when an expansion was forced to fail,
1280 contradicting the general specification for all authenticators. Instead it
1281 was generating a temporary error. It now behaves as specified.
1282
26dd5a95
PH
128350. The default ordering of permitted cipher suites for GnuTLS was pessimal
1284 (the order specifies the preference for clients). The order is now AES256,
1285 AES128, 3DES, ARCFOUR128.
1286
343b2385
PH
128751. Small patch to Sieve code - explicitly set From: when generating an
1288 autoreply.
1289
1c5466b9
PH
129052. Exim crashed if a remote delivery caused a very long error message to be
1291 recorded - for instance if somebody sent an entire SpamAssassin report back
1292 as a large number of 550 error lines. This bug was coincidentally fixed by
1293 increasing the size of one of Exim's internal buffers (big_buffer) that
1294 happened as part of the Exiscan merge. However, to be on the safe side, I
1295 have made the code more robust (and fixed the comments that describe what
1296 is going on).
1297
55ee9ee3
PH
129853. Now that there can be additional text after "Completed" in log lines (if
1299 the queue_time_overall log selector is set), a one-byte patch to exigrep
1300 was needed to allow it to recognize "Completed" as not the last thing in
1301 the line.
1302
d38f8232
PH
130354. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1304 patch that reportedly fixes this has been added. I am not expert enough to
1305 create a test for it. This is what the patch creator wrote:
1306
1307 "I found a little strange behaviour of ldap code when working with
1308 Windows 2003 AD Domain, where users was placed in more than one
1309 Organization Units. When I tried to give exim partial DN, the exit code
1310 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1311 But simultaneously result of request was absolutely normal ldap result,
1312 so I produce this patch..."
1313
3295e65b
PH
1314 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1315 REFERENCE, so I have modified the code to exclude the patch when that macro
1316 is not defined.
1317
7102e136
PH
131855. Some experimental protocols are using DNS PTR records for new purposes. The
1319 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1320 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1321 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1322 CAN-2005-0021
7102e136 1323
3ca0ba97
PH
132456. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1325
c2bcbe20
PH
132657. Double the size of the debug message buffer (to 2048) so that more of very
1327 long debug lines gets shown.
1328
18ce445d
PH
132958. The exicyclog utility now does better if the number of log files to keep
1330 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1331
1f5b4c3d
PH
133259. Two changes related to the smtp_active_hostname option:
1333
1334 (1) $smtp_active_hostname is now available as a variable.
1335 (2) The default for smtp_banner uses $smtp_active_hostname instead
1336 of $primary_hostname.
1337
b975ba52
PH
133860. The host_aton() function is supposed to be passed a string that is known
1339 to be a valid IP address. However, in the case of IPv6 addresses, it was
1340 not checking this. This is a hostage to fortune. Exim now panics and dies
1341 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1342 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1343 components; fortuitously, this particular loophole had already been fixed
1344 by change 4.50/55 above.
1345
1346 If there are any other similar loopholes, the new check in host_aton()
1347 itself should stop them being exploited. The report I received stated that
1348 data on the command line could provoke the exploit when Exim was running as
1349 exim, but did not say which command line option was involved. All I could
1350 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1351 running as the user.
ea3a6f44 1352 CAN-2005-0021
85b87bc2
PH
1353
135461. There was a buffer overflow vulnerability in the SPA authentication code
1355 (which came originally from the Samba project). I have added a test to the
1356 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1357 CAN-2005-0022
b975ba52 1358
17ffcae7
PH
135962. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1360 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1361
d95f9fdb
PH
136263. The daemon start-up calls getloadavg() while still root for those OS that
1363 need the first call to be done as root, but it missed one case: when
1364 deliver_queue_load_max is set with deliver_drop_privilege. This is
1365 necessary for the benefit of the queue runner, because there is no re-exec
1366 when deliver_drop_privilege is set.
1367
86b8287f
PH
136864. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1369 This has been fixed.
1370
60dc5e56
PH
137165. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1372 was in use, was not putting the data itself into the right store pool;
1373 consequently, it could be overwritten for a subsequent message in the same
1374 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1375 the caching.)
1376
533244af
PH
137766. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1378
a5a28604
PH
137967. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1380 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1381 the function were treating the return as a boolean value, which happened to
1382 work because 0=false and not-0=true, but is not correct code.
1383
7e634d24
PH
138468. The host_aton() function was not handling scoped IPv6 addresses (those
1385 with, for example, "%eth0" on the end) correctly.
1386
3e11c26b
PH
138769. Fixed some compiler warnings in acl.c for the bitmaps specified with
1388 negated items (that is, ~something) in unsigned ints. Some compilers
1389 apparently mutter when there is no cast.
1390
6729cf78
PH
139170. If an address verification called from an ACL failed, and did not produce a
1392 user-specific message (i.e. there was only a "system" message), nothing was
1393 put in $acl_verify_message. In this situation, it now puts the system
1394 message there.
1395
00f00ca5
PH
139671. Change 4.23/11 added synchronization checking at the start of an SMTP
1397 session; change 4.31/43 added the unwanted input to the log line - except
1398 that it did not do this in the start of session case. It now does.
1399
c9bdd01c
PH
140072. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1401 This is wrong and can cause the other end to generate a synchronization
1402 error if it is another Exim or anything else that does the synchronization
1403 check. A QUIT command is no longer sent after a timeout.
1404
d43194df
PH
140573. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1406 during host lookups.
1407
fe5b5d0b
PH
140874. The defer_ok option of callout verification was not working if it was used
1409 when verifying addresses in header lines, that is, for this case:
1410
1411 verify = header_sender/callout=defer_ok
1412
76a2d7ba
PH
141375. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1414 those file descriptors could be used for SMTP connections. If anything
1415 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1416 could be sent to the SMTP client, causing chaos. The daemon now opens
1417 stdin, stdout, and stderr to /dev/null when it puts itself into the
1418 background.
1419
142076. Arrange for output from Perl's "warn" command to be written to Exim's main
1421 log by default. The user can override this with suitable Perl magic.
1422
04f7d5b9
PH
142377. The use of log_message on a "discard" ACL verb, which is supposed to add to
1424 the log message when discard triggers, was not working for the DATA ACL or
1425 for the non-SMTP ACL.
1426
bc60667e
PH
142778. Error message wording change in sieve.c.
1428
bb6e88ff
PH
142979. If smtp_accept_max_per_host was set, the number of connections could be
1430 restricted to fewer than expected, because the daemon was trying to set up
1431 a new connection before checking whether the processes handling previous
1432 connections had finished. The check for completed processes is now done
1433 earlier. On busy systems, this bug wouldn't be noticed because something
1434 else would have woken the daemon, and it would have reaped the completed
1435 process earlier.
1436
1e70f85b
PH
143780. If a message was submitted locally by a user whose login name contained one
1438 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1439 It caused a spool format error. I have fixed the spool reading code. A
1440 related problem was that the "from" clause in the Received: line became
1441 illegal because of the space(s). It is now covered by ${quote_local_part.
1442
144381. Included the latest eximstats from Steve (adds average sizes to HTML Top
1444 tables).
1445
4e01f9d6
PH
144682. Updated OS/Makefile-AIX as per message from Mike Meredith.
1447
1ee1cef2
PH
144883. Patch from Sieve maintainer to fix unterminated string problem in
1449 "vacation" handling.
1450
6e2b4ccc
PH
145184. Some minor changes to the Linux configuration files to help with other
1452 OS variants using glibc.
1453
8e669ac1
PH
145485. One more patch for Sieve to update vacation handling to latest spec.
1455
495ae4b0 1456
bbe902f0
PH
1457----------------------------------------------------
1458See the note above about the 4.44 and 4.50 releases.
1459----------------------------------------------------
1460
1461
1462Exim version 4.44
1463-----------------
1464
1465 1. Change 4.43/35 introduced a bug that caused file counts to be
1466 incorrectly computed when quota_filecount was set in an appendfile
1467 transport
1468
1469 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1470 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1471 place.
1472
1473 3. Give more explanation in the error message when the command for a transport
1474 filter fails to execute.
1475
1476 4. There are several places where Exim runs a non-Exim command in a
1477 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1478 was being done only for the command run by the queryprogram router. It is
1479 now done for all such subprocesses. The other cases are: ${run, transport
1480 filters, and the commands run by the lmtp and pipe transports.
1481
1482 5. Some older OS have a limit of 256 on the maximum number of file
1483 descriptors. Exim was using setrlimit() to set 1000 as a large value
1484 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1485 systems. I've change it so that if it can't get 1000, it tries for 256.
1486
1487 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1488 was an oversight, and furthermore, ever since the addition of extra
1489 controls (e.g. 4.43/32), the checks on when to allow different forms of
1490 "control" were broken. There should now be diagnostics for all cases when a
1491 control that does not make sense is encountered.
1492
1493 7. $recipients is now available in the predata ACL (oversight).
1494
1495 8. Tidy the search cache before the fork to do a delivery from a message
1496 received from the command line. Otherwise the child will trigger a lookup
1497 failure and thereby defer the delivery if it tries to use (for example) a
1498 cached ldap connection that the parent has called unbind on.
1499
1500 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1501 of $address_data from the recipient verification was clobbered by the
1502 sender verification.
1503
150410. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1505 was its contents. (It was OK if the option was not defined at all.)
1506
150711. A "Completed" log line is now written for messages that are removed from
1508 the spool by the -Mrm option.
1509
151012. $host_address is now set to the target address during the checking of
1511 ignore_target_hosts.
1512
151313. When checking ignore_target_hosts for an ipliteral router, no host name was
1514 being passed; this would have caused $sender_host_name to have been used if
1515 matching the list had actually called for a host name (not very likely,
1516 since this list is usually IP addresses). A host name is now passed as
1517 "[x.x.x.x]".
1518
151914. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1520 code that specifies a non-restarting handler (typically sigaction() in
1521 modern systems) in an attempt to fix a rare and obscure crash bug.
1522
152315. Narrowed the window for a race in the daemon that could cause it to ignore
1524 SIGCHLD signals. This is not a major problem, because they are used only to
1525 wake it up if nothing else does.
1526
152716. A malformed maildirsize file could cause Exim to calculate negative values
1528 for the mailbox size or file count. Odd effects could occur as a result.
1529 The maildirsize information is now recalculated if the size or filecount
1530 end up negative.
1531
153217. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1533 support for a long time. Removed HAVE_SYS_VFS_H.
1534
ea3a6f44 153518. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1536
153719. Allow an empty sender to be matched against a lookup in an address list.
1538 Previously the only cases considered were a regular expression, or an
1539 empty pattern.
1540
154120. Exim went into a mad DNS lookup loop when doing a callout where the
1542 host was specified on the transport, if the DNS lookup yielded more than
1543 one IP address.
1544
ea3a6f44
NM
154521. The RFC2047 encoding function was originally intended for short strings
1546 such as real names; it was not keeping to the 75-character limit for
1547 encoded words that the RFC imposes. It now respects the limit, and
1548 generates multiple encoded words if necessary. To be on the safe side, I
1549 have increased the buffer size for the ${rfc2047: expansion operator from
1550 1024 to 2048 bytes.
bbe902f0 1551
ea3a6f44
NM
155222. Failure to deliver a bounce message always caused it to be frozen, even if
1553 there was an errors_to setting on the router. The errors_to setting is now
1554 respected.
bbe902f0
PH
1555
155623. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1557 canonical form (fully expanded) before being placed in
1558 $sender_host_address.
1559
156024. Updated eximstats to version 1.33
1561
ea3a6f44
NM
156225. Include certificate and key file names in error message when GnuTLS fails
1563 to set them up, because the GnuTLS error message doesn't include the name
1564 of the failing file when there is a problem reading it.
bbe902f0
PH
1565
156626. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1567 As per change 25.
bbe902f0 1568
ea3a6f44
NM
156927. Reset the locale to "C" after calling embedded Perl, in case it was changed
1570 (this can affect the format of dates).
bbe902f0 1571
ea3a6f44
NM
157228. exim_tidydb, when checking for the continued existence of a message for
1573 which it has found a message-specific retry record, was not finding
1574 messages that were in split spool directories. Consequently, it was
1575 deleting retry records that should have stayed in existence.
bbe902f0
PH
1576
157729. eximstats updated to version 1.35
1578 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1579 1.35 - bugfix such that pie charts by volume are generated correctly
1580
ea3a6f44
NM
158130. The SPA authentication driver was not abandoning authentication and moving
1582 on to the next authenticator when an expansion was forced to fail,
1583 contradicting the general specification for all authenticators. Instead it
1584 was generating a temporary error. It now behaves as specified.
bbe902f0 1585
ea3a6f44
NM
158631. The default ordering of permitted cipher suites for GnuTLS was pessimal
1587 (the order specifies the preference for clients). The order is now AES256,
1588 AES128, 3DES, ARCFOUR128.
bbe902f0 1589
ea3a6f44
NM
159031. Small patch to Sieve code - explicitly set From: when generating an
1591 autoreply.
bbe902f0 1592
ea3a6f44
NM
159332. Exim crashed if a remote delivery caused a very long error message to be
1594 recorded - for instance if somebody sent an entire SpamAssassin report back
1595 as a large number of 550 error lines. This bug was coincidentally fixed by
1596 increasing the size of one of Exim's internal buffers (big_buffer) that
1597 happened as part of the Exiscan merge. However, to be on the safe side, I
1598 have made the code more robust (and fixed the comments that describe what
1599 is going on).
bbe902f0 1600
ea3a6f44
NM
160133. Some experimental protocols are using DNS PTR records for new purposes. The
1602 keys for these records are domain names, not reversed IP addresses. The
1603 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1604 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1605 CAN-2005-0021
1606
ea3a6f44
NM
160734. The host_aton() function is supposed to be passed a string that is known
1608 to be a valid IP address. However, in the case of IPv6 addresses, it was
1609 not checking this. This is a hostage to fortune. Exim now panics and dies
1610 if the condition is not met. A case was found where this could be provoked
1611 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1612 components; fortuitously, this particular loophole had already been fixed
1613 by change 4.50/55 or 4.44/33 above.
1614
1615 If there are any other similar loopholes, the new check in host_aton()
1616 itself should stop them being exploited. The report I received stated that
1617 data on the command line could provoke the exploit when Exim was running as
1618 exim, but did not say which command line option was involved. All I could
1619 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1620 running as the user.
bbe902f0
PH
1621 CAN-2005-0021
1622
ea3a6f44
NM
162335. There was a buffer overflow vulnerability in the SPA authentication code
1624 (which came originally from the Samba project). I have added a test to the
1625 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1626 CAN-2005-0022
1627
ea3a6f44
NM
162836. The daemon start-up calls getloadavg() while still root for those OS that
1629 need the first call to be done as root, but it missed one case: when
1630 deliver_queue_load_max is set with deliver_drop_privilege. This is
1631 necessary for the benefit of the queue runner, because there is no re-exec
1632 when deliver_drop_privilege is set.
bbe902f0 1633
ea3a6f44
NM
163437. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1635 was in use, was not putting the data itself into the right store pool;
1636 consequently, it could be overwritten for a subsequent message in the same
1637 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1638 the caching.)
bbe902f0 1639
ea3a6f44
NM
164038. Sometimes the final signoff response after QUIT could fail to get
1641 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1642 < 0 before doing a fflush(). This bug looks as though it goes back to the
1643 introduction of TLS in release 3.20, but "sometimes" must have been rare
1644 because the tests only now provoked it.
bbe902f0
PH
1645
1646
495ae4b0
PH
1647Exim version 4.43
1648-----------------
1649
1650 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1651 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1652 Now it returns an integer. A number of calls were still expecting a T/F
1653 return. Fortuitously, in all cases, the tests worked in OK situations,
1654 which is the norm. However, things would have gone wrong on any write
1655 failures on the smtp file descriptor. This function is used when sending
1656 messages over SMTP and also when doing verify callouts.
1657
1658 2. When Exim is called to do synchronous delivery of a locally submitted
1659 message (the -odf or -odi options), it no longer closes stderr before doing
1660 the delivery.
1661
1662 3. Implemented the mua_wrapper option.
1663
1664 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1665
1666 5. Implemented the functions header_remove(), header_testname(),
1667 header_add_at_position(), and receive_remove_recipient(), and exported them
1668 to local_scan().
1669
1670 6. If an ACL "warn" statement specified the addition of headers, Exim already
1671 inserted X-ACL-Warn: at the start if there was no header name. However, it
1672 was not making this test for the second and subsequent header lines if
1673 there were newlines in the string. This meant that an invalid header could
1674 be inserted if Exim was badly configured.
1675
1676 7. Allow an ACL "warn" statement to add header lines at the start or after all
1677 the Received: headers, as well as at the end.
1678
1679 8. Added the rcpt_4xx retry error code.
1680
1681 9. Added postmaster_mailfrom=xxx to callout verification option.
1682
168310. Added mailfrom=xxxx to the callout verification option, for verify=
1684 header_sender only.
1685
168611. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1687 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1688
168912. Inserted some casts to stop certain compilers warning when using pointer
1690 differences as field lengths or precisions in printf-type calls (mostly
1691 affecting debugging statements).
1692
169313. Added optional readline() support for -be (dynamically loaded).
1694
169514. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1696 same clock tick as a message's arrival, so that its received time was the
1697 same as the "first fail" time on the retry record, and that message
1698 remained on the queue past the ultimate address timeout, every queue runner
1699 would try a delivery (because it was past the ultimate address timeout) but
1700 after another failure, the ultimate address timeout, which should have then
1701 bounced the address, did not kick in. This was a "< instead of <=" error;
1702 in most cases the first failure would have been in the next clock tick
1703 after the received time, and all would be well.
1704
170515. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1706 being recognized when the domain list was tested by the match_domain
1707 condition in an expansion string.
1708
170916. Added the ${str2b64: operator.
1710
171117. Exim was always calling setrlimit() to set a large limit for the number of
1712 processes, without checking whether the existing limit was already
1713 adequate. (It did check for the limit on file descriptors.) Furthermore,
1714 errors from getrlimit() and setrlimit() were being ignored. Now they are
1715 logged to the main and panic logs, but Exim does carry on, to try to do its
1716 job under whatever limits there are.
1717
171818. Imported PCRE 5.0.
1719
172019. Trivial typo in log message " temporarily refused connection" (the leading
1721 space).
1722
172320. If the log selector return_path_on_delivery was set and an address was
1724 redirected to /dev/null, the delivery process crashed because it assumed
1725 that a return path would always be set for a "successful" delivery. In this
1726 case, the whole delivery is bypassed as an optimization, and therefore no
1727 return path is set.
1728
172921. Internal re-arrangement: the function for sending a challenge and reading
1730 a response while authentication was assuming a zero-terminated challenge
1731 string. It's now changed to take a pointer and a length, to allow for
1732 binary data in such strings.
1733
173422. Added the cyrus_sasl authenticator (code supplied by MBM).
1735
173623. Exim was not respecting finduser_retries when seeking the login of the
1737 uid under which it was called; it was always trying 10 times. (The default
1738 setting of finduser_retries is zero.) Also, it was sleeping after the final
1739 failure, which is pointless.
1740
174124. Implemented tls_on_connect_ports.
1742
174325. Implemented acl_smtp_predata.
1744
174526. If the domain in control=submission is set empty, Exim assumes that the
1746 authenticated id is a complete email address when it generates From: or
1747 Sender: header lines.
1748
174927. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1750 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1751 chown and chgrp in /bin and hostname in /usr/bin.
1752
175328. Exim was keeping the "process log" file open after each use, just as it
1754 does for the main log. This opens the possibility of it remaining open for
1755 long periods when the USR1 signal hits a daemon. Occasional processlog
1756 errors were reported, that could have been caused by this. Anyway, it seems
1757 much more sensible not to leave this file open at all, so that is what now
1758 happens.
1759
176029. The long-running daemon process does not normally write to the log once it
1761 has entered its main loop, and it closes the log before doing so. This is
1762 so that log files can straightforwardly be renamed and moved. However,
1763 there are a couple of unusual error situations where the daemon does write
1764 log entries, and I had neglected to close the log afterwards.
1765
176630. The text of an SMTP error response that was received during a remote
1767 delivery was being truncated at 512 bytes. This is too short for some of
1768 the long messages that one sometimes sees. I've increased the limit to
1769 1024.
1770
177131. It is now possible to make retry rules that apply only when a message has a
1772 specific sender, in particular, an empty sender.
1773
177432. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1775 it possible to be selective about when SMTP synchronization is enforced.
1776
177733. Added "control = caseful_local_part" and "control = "caselower_local_part".
1778
177932. Implemented hosts_connection_nolog.
1780
178133. Added an ACL for QUIT.
1782
178334. Setting "delay_warning=" to disable warnings was not working; it gave a
1784 syntax error.
1785
178635. Added mailbox_size and mailbox_filecount to appendfile.
1787
178836. Added control = no_multiline_responses to ACLs.
1789
179037. There was a bug in the logic of the code that waits for the clock to tick
1791 in the case where the clock went backwards by a substantial amount such
1792 that the microsecond fraction of "now" was more than the microsecond
1793 fraction of "then" (but the whole seconds number was less).
1794
179538. Added support for the libradius Radius client library this is found on
1796 FreeBSD (previously only the radiusclient library was supported).
1797
1798
1799Exim version 4.42
1800-----------------
1801
1802 1. When certain lookups returned multiple values in the form name=value, the
1803 quoting of the values was not always being done properly. Specifically:
1804 (a) If the value started with a double quote, but contained no whitespace,
1805 it was not quoted.
1806 (b) If the value contained whitespace other than a space character (i.e.
1807 tabs or newlines or carriage returns) it was not quoted.
1808 This fix has been applied to the mysql and pgsql lookups by writing a
1809 separate quoting function and calling it from the lookup code. The fix
1810 should probably also be applied to nisplus, ibase and oracle lookups, but
1811 since I cannot test any of those, I have not disturbed their existing code.
1812
1813 2. A hit in the callout cache for a specific address caused a log line with no
1814 reason for rejecting RCPT. Now it says "Previous (cached) callout
1815 verification failure".
1816
1817 3. There was an off-by-one bug in the queryprogram router. An over-long
1818 return line was truncated at 256 instead of 255 characters, thereby
1819 overflowing its buffer with the terminating zero. As well as fixing this, I
1820 have increased the buffer size to 1024 (and made a note to document this).
1821
1822 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1823 when Exim is waiting for an SMTP response from a remote server, Exim
1824 restarts its select() call on the socket, thereby resetting its timeout.
1825 This is not a problem when such interrupts are rare. Somebody set up a cron
1826 job to run exiwhat every 2 minutes, which is less than the normal select()
1827 timeout (5 or 10 minutes). This meant that the select() timeout never
1828 kicked in because it was always reset. I have fixed this by comparing the
1829 time when an interrupt arrives with the time at the start of the first call
1830 to select(). If more time than the timeout has elapsed, the interrupt is
1831 treated as a timeout.
1832
1833 5. Some internal re-factoring in preparation for the addition of Sieve
1834 extensions (by MH). In particular, the "personal" test is moved to a
1835 separate function, and given an option for scanning Cc: and Bcc: (which is
1836 not set for Exim filters).
1837
1838 6. When Exim created an email address using the login of the caller as the
1839 local part (e.g. when creating a From: or Sender: header line), it was not
1840 quoting the local part when it contained special characters such as @.
1841
1842 7. Installed new OpenBSD configuration files.
1843
1844 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1845 try to make them clearer.
1846
1847 9. Callout options, other than the timeout value, were being ignored when
1848 verifying sender addresses in header lines. For example, when using
1849
1850 verify = header_sender/callout=no_cache
1851
1852 the cache was (incorrectly) being used.
1853
185410. Added a missing instance of ${EXE} to the exim_install script; this affects
1855 only the Cygwin environment.
1856
185711. When return_path_on_delivery was set as a log selector, if different remote
1858 addresses in the same message used different return paths and parallel
1859 remote delivery occurred, the wrong values would sometimes be logged.
1860 (Whenever a remote delivery process finished, the return path value from
1861 the most recently started remote delivery process was logged.)
1862
186312. RFC 3848 specifies standard names for the "with" phrase in Received: header
1864 lines when AUTH and/or TLS are in use. This is the "received protocol"
1865 field. Exim used to use "asmtp" for authenticated SMTP, without any
1866 indication (in the protocol name) for TLS use. Now it follows the RFC and
1867 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1868 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1869 names appear in log lines as well as in Received: header lines.
1870
187113. Installed MH's patches for Sieve to add the "copy" and "vacation"
1872 extensions, and comparison tests, and to fix some bugs.
1873
187414. Changes to the "personal" filter test:
1875
1876 (1) The test was buggy in that it was just doing the equivalent of
1877 "contains" tests on header lines. For example, if a user's address was
1878 anne@some.where, the "personal" test would incorrectly be true for
1879
1880 To: susanne@some.where
1881
1882 This test is now done by extracting each address from the header in turn,
1883 and checking the entire address. Other tests that are part of "personal"
1884 are now done using regular expressions (for example, to check local parts
1885 of addresses in From: header lines).
1886
1887 (2) The list of non-personal local parts in From: addresses has been
1888 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1889 taken from the Sieve specification recommendations.
1890
1891 (3) If the message contains any header line starting with "List-" it is
1892 treated as non-personal.
1893
1894 (4) The test for "circular" in the Subject: header line has been removed
1895 because it now seems ill-conceived.
1896
189715. Minor typos in src/EDITME comments corrected.
1898
189916. Installed latest exipick from John Jetmore.
1900
190117. If headers_add on a router specified a text string that was too long for
1902 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1903 of string_sprintf() is now avoided.
1904
190518. $message_body_size was not set (it was always zero) when running the DATA
1906 ACL and the local_scan() function.
1907
190819. For the "mail" command in an Exim filter, no default was being set for
1909 the once_repeat time, causing a random time value to be used if "once" was
1910 specified. (If the value happened to be <= 0, no repeat happened.) The
1911 default is now 0s, meaning "never repeat". The "vacation" command was OK
1912 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1913 (I found it when inspecting the code).
1914
191520. There is now an overall timeout for performing a callout verification. It
1916 defaults to 4 times the callout timeout, which applies to individual SMTP
1917 commands during the callout. The overall timeout applies when there is more
1918 than one host that can be tried. The timeout is checked before trying the
1919 next host. This prevents very long delays if there are a large number of
1920 hosts and all are timing out (e.g. when the network connections are timing
1921 out). The value of the overall timeout can be changed by specifying an
1922 additional sub-option for "callout", called "maxwait". For example:
1923
1924 verify = sender/callout=5s,maxwait=20s
1925
192621. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1927 to the end before writing, but this should make it even safer).
1928
192922. Exim was forgetting that it had advertised PIPELINING for the second and
1930 subsequent messages on an SMTP connection. It was also not resetting its
1931 memory on STARTTLS and an internal HELO.
1932
193323. When Exim logs an SMTP synchronization error within a session, it now
1934 records whether PIPELINING has been advertised or not.
1935
193624. Added 3 instances of "(long int)" casts to time_t variables that were being
1937 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1938 rather than long int.
1939
194025. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1941
194226. Added the never_mail option to autoreply.
1943
1944
1945Exim version 4.41
1946-----------------
1947
1948 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1949 crash if the getsockname() call failed; this can happen if a connection is
1950 closed very soon after it is established. The problem was simply in the
1951 order in which certain operations were done, causing Exim to try to write
1952 to the SMTP stream before it had set up the file descriptor. The bug has
1953 been fixed by making things happen in the correct order.
1954
1955
1956Exim version 4.40
1957-----------------
1958
1959 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1960 before the connection was closed, thus losing the rejection response.
1961
1962 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1963 some early Solaris releases, but causes trouble in current releases where
1964 socklen_t is defined.
1965
1966 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1967 always exist.
1968
1969 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1970 configured.
1971
1972 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1973 that releasing the top of it at the end releases what was used for sub-
1974 expansions (unless the block got too big). However, discard this block if
1975 the first thing is a variable or header, so that we can use its block when
1976 it is dynamic (useful for very large $message_headers, for example).
1977
1978 6. Lookups now cache *every* query, not just the most recent. A new, separate
1979 store pool is used for this. It can be recovered when all lookup caches are
1980 flushed. Lookups now release memory at the end of their result strings.
1981 This has involved some general refactoring of the lookup sources.
1982
1983 7. Some code has been added to the store_xxx() functions to reduce the amount
1984 of flapping under certain conditions.
1985
1986 8. log_incoming_interface used to affect only the <= reception log lines. Now
1987 it causes the local interface and port to be added to several more SMTP log
1988 lines, for example "SMTP connection from", and rejection lines.
1989
1990 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1991
199210. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1993
199411. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1995 could be overwritten at the end of the current message (or the start of a
1996 new message if it was set in a HELO ACL). The value is now preserved for
1997 the duration of the SMTP connection.
1998
199912. If a transport had a headers_rewrite setting, and a matching header line
2000 contained an unqualified address, that address was qualified, even if it
2001 did not match any rewriting rules. The underlying bug was that the values
2002 of the flags that permit the existence of unqualified sender and recipient
2003 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2004 non-local messages, and by -bnq for local messages) were not being
2005 preserved with the message after it was received.
2006
200713. When Exim was logging an SMTP synchronization error, it could sometimes log
2008 "next input=" as part of the text comprising the host identity instead of
2009 the correct text. The code was using the same buffer for two different
2010 strings. However, depending on which order the printing function evaluated
2011 its arguments, the bug did not always show up. Under Linux, for example, my
2012 test suite worked just fine.
2013
201414. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2015 doesn't work with some older versions of Perl. It has been changed to "my",
2016 which in any case is probably the better facility to use.
2017
201815. A really picky compiler found some instances of statements for creating
2019 error messages that either had too many or two few arguments for the format
2020 string.
2021
202216. The size of the buffer for calls to the DNS resolver has been increased
2023 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2024 for addresses that have a lot of PTR records. This alleviates a problem; it
2025 does not fully solve it.
2026
202717. A dnsdb lookup for PTR records that receives more data than will fit in the
2028 buffer now truncates the list and logs the incident, which is the same
2029 action as happens when Exim is looking up a host name and its aliases.
2030 Previously in this situation something unpredictable would happen;
2031 sometimes it was "internal error: store_reset failed".
2032
203318. If a server dropped the connection unexpectedly when an Exim client was
2034 using GnuTLS and trying to read a response, the client delivery process
2035 crashed while trying to generate an error log message.
2036
203719. If a "warn" verb in an ACL added multiple headers to a message in a single
2038 string, for example:
2039
2040 warn message = H1: something\nH2: something
2041
2042 the text was added as a single header line from Exim's point of view
2043 though it ended up OK in the delivered message. However, searching for the
2044 second and subsequent header lines using $h_h2: did not work. This has been
2045 fixed. Similarly, if a system filter added multiple headers in this way,
2046 the routers could not see them.
2047
204820. Expanded the error message when iplsearch is called with an invalid key to
2049 suggest using net-iplsearch in a host list.
2050
205121. When running tests using -bh, any delays imposed by "delay" modifiers in
2052 ACLs are no longer actually imposed (and a message to that effect is
2053 output).
2054
205522. If a "gecos" field in a passwd entry contained escaped characters, in
2056 particular, if it contained a \" sequence, Exim got it wrong when building
2057 a From: or a Sender: header from that name. A second bug also caused
2058 incorrect handling when an unquoted " was present following a character
2059 that needed quoting.
2060
206123. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2062 was not being matched caselessly.
2063
206424. Arranged for all hyphens in the exim.8 source to be escaped with
2065 backslashes.
2066
206725. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2068 properly. Recipient callout cache records were still being keyed to include
2069 the sender, even when use_sender was set false. This led to far more
2070 callouts that were necessary. The sender is no longer included in the key
2071 when use_sender is false.
2072
207326. Added "control = submission" modifier to ACLs.
2074
207527. Added the ${base62d: operator to decode base 62 numbers.
2076
207728. dnsdb lookups can now access SRV records.
2078
207929. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2080 the configuration file.
2081
208230. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2083 (-v) mode. This makes the output for a verbose queue run more intelligible.
2084
208531. Added a use_postmaster feature to recipient callouts.
2086
208732. Added the $body_zerocount variable, containing the number of binary zero
2088 bytes in the message body.
2089
209033. The time of last modification of the "new" subdirectory is now used as the
2091 "mailbox time last read" when there is a quota error for a maildir
2092 delivery.
2093
209434. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2095
209635. Added +ignore_unknown as a special item in host lists.
2097
209836. Code for decoding IPv6 addresses in host lists is now included, even if
2099 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2100 address was recognized as an IP address, but was then not correctly decoded
2101 into binary, causing unexpected and incorrect effects when compared with
2102 another IP address.
2103
2104
2105Exim version 4.34
2106-----------------
2107
2108 1. Very minor rewording of debugging text in manualroute to say "list of
2109 hosts" instead of "hostlist".
2110
2111 2. If verify=header_syntax was set, and a header line with an unqualified
2112 address (no domain) and a large number of spaces between the end of the
2113 name and the colon was received, the reception process suffered a buffer
2114 overflow, and (when I tested it) crashed. This was caused by some obsolete
2115 code that should have been removed. The fix is to remove it!
2116
2117 3. When running in the test harness, delay a bit after writing a bounce
2118 message to get a bit more predictability in the log output.
2119
2120 4. Added a call to search_tidyup() just before forking a reception process. In
2121 theory, someone could use a lookup in the expansion of smtp_accept_max_
2122 per_host which, without the tidyup, could leave open a database connection.
2123
2124 5. Added the variables $recipient_data and $sender_data which get set from a
2125 lookup success in an ACL "recipients" or "senders" condition, or a router
2126 "senders" option, similar to $domain_data and $local_part_data.
2127
2128 6. Moved the writing of debug_print from before to after the "senders" test
2129 for routers.
2130
2131 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2132 problems for message scanning, either using a data ACL, or using
2133 local_scan() because the Received: header was not generated till after they
2134 were called (in order to set the time as the time of reception completion).
2135 I have revised the way this works. The header is now generated after the
2136 body is received, but before the ACL or local_scan() are called. After they
2137 are run, the timestamp in the header is updated.
2138
2139
2140Exim version 4.33
2141-----------------
2142
2143 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2144 before starting a queue runner without re-exec. This happened only when
2145 deliver_drop_privilege was set or when the Exim user was set to root. The
2146 effect of the bug was that timeouts during subsequent deliveries caused
2147 crashes instead of being properly handled. The handler is now left at its
2148 default (and expected) setting.
2149
2150 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2151 message, again when deliver_drop_privilege is set or Exim is run as root.
2152 The bug described in (1) was not present in this case, but the tidying up
2153 of the other signals was missing. I have made the two cases consistent.
2154
2155 3. The ignore_target_hosts setting on a manualroute router was being ignored
2156 for hosts that were looked up using the /MX notation.
2157
2158 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2159 in domain lists.
2160
2161 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2162 operated on the sender address. After changing the $sender_address to <>
2163 for the sender address verify, Exim was re-instated it as the original
2164 (before rewriting) address, but remembering that it had rewritten it, so it
2165 wasn't rewriting it again. This bug also had the effect of breaking the
2166 sender address verification caching when the sender address was rewritten.
2167
2168 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2169 This has been changed so that if the ip literal address matches
2170 ignore_target_hosts, the router declines.
2171
2172 7. Added expansion conditions match_domain, match_address, and match_local_
2173 part (NOT match_host).
2174
2175 8. The placeholder for the Received: header didn't have a length field set.
2176
2177 9. Added code to Exim itself and to exim_lock to test for a specific race
2178 condition that could lead to file corruption when using MBX delivery. The
2179 issue is with the lockfile that is created in /tmp. If this file is removed
2180 after a process has opened it but before that process has acquired a lock,
2181 there is the potential for a second process to recreate the file and also
2182 acquire a lock. This could lead to two Exim processes writing to the file
2183 at the same time. The added code performs the same test as UW imapd; it
2184 checks after acquiring the lock that its file descriptor still refers to
2185 the same named file.
2186
218710. The buffer for building added header lines was of fixed size, 8192 bytes.
2188 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2189 when Exim is built.
2190
219111. Added the smtp_active_hostname option. If used, this will typically be made
2192 to depend on the incoming interface address. Because $interface_address is
2193 not set up until the daemon has forked a reception process, error responses
2194 that can happen earlier (such as "too many connections") no longer contain
2195 a host name.
2196
219712. If an expansion in a condition on a "warn" statement fails because a lookup
2198 defers, the "warn" statement is abandoned, and the next ACL statement is
2199 processed. Previously this caused the whole ACL to be aborted.
2200
220113. Added the iplsearch lookup type.
2202
220314. Added ident_timeout as a log selector.
2204
220515. Added tls_certificate_verified as a log selector.
2206
220716. Added a global option tls_require_ciphers (compare the smtp transport
2208 option of the same name). This controls incoming TLS connections.
2209
221017. I finally figured out how to make tls_require_ciphers do a similar thing
2211 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2212 before starting the TLS session.
2213
221418. Tabs are now shown as \t in -bP output.
2215
221619. If the log selector return_path_on_delivery was set, Exim crashed when
2217 bouncing a message because it had too many Received: header lines.
2218
221920. If two routers both had headers_remove settings, and the first one included
2220 a superfluous trailing colon, the final name in the first list and the
2221 first name in the second list were incorrectly joined into one item (with a
2222 colon in the middle).
2223
2224
2225Exim version 4.32
2226-----------------
2227
2228 1. Added -C and -D options to the exinext utility, mainly to make it easier
2229 to include in the automated testing, but these could be helpful when
2230 multiple configurations are in use.
2231
2232 2. The exinext utility was not formatting the output nicely when there was
2233 an alternate port involved in the retry record key, nor when there was a
2234 message id as well (for retries that were specific to a specific message
2235 and a specific host). It was also confused by IPv6 addresses, because of
2236 the additional colons they contain. I have fixed the IPv4 problem, and
2237 patched it up to do a reasonable job for IPv6.
2238
2239 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2240 delivery, the log line now contains "pipelined" if PIPELINING was used.
2241
2242 4. An SMTP transport process used to panic and die if the bind() call to set
2243 an explicit outgoing interface failed. This has been changed; it is now
2244 treated in the same way as a connect() failure.
2245
2246 5. A reference to $sender_host_name in the part of a conditional expansion
2247 that was being skipped was still causing a DNS lookup. This no longer
2248 occurs.
2249
2250 6. The def: expansion condition was not recognizing references to header lines
2251 that used bh_ and bheader_.
2252
2253 7. Added the _cache feature to named lists.
2254
2255 8. The code for checking quota_filecount in the appendfile transport was
2256 allowing one more file than it should have been.
2257
2258 9. For compatibility with Sendmail, the command line option
2259
2260 -prval:sval
2261
2262 is equivalent to
2263
2264 -oMr rval -oMs sval
2265
2266 and sets the incoming protocol and host name (for trusted callers). The
2267 host name and its colon can be omitted when only the protocol is to be set.
2268 Note the Exim already has two private options, -pd and -ps, that refer to
2269 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2270 "s", but I don't think that's a major issue.
2271
227210. A number of refactoring changes to the code, none of which should affect
2273 Exim's behaviour:
2274
2275 (a) The number of logging options was getting close to filling up the
2276 32-bit word that was used as a bit map. I have split them into two classes:
2277 those that are passed in the argument to log_write(), and those that are
2278 only ever tested independently outside of that function. These are now in
2279 separate 32-bit words, so there is plenty of room for expansion again.
2280 There is no change in the user interface or the logging behaviour.
2281
2282 (b) When building, for example, log lines, the code previously used a
2283 macro that called string_cat() twice, in order to add two strings. This is
2284 not really sufficiently general. Furthermore, there was one instance where
2285 it was actually wrong because one of the argument was used twice, and in
2286 one call a function was used. (As it happened, calling the function twice
2287 did not affect the overall behaviour.) The macro has been replaced by a
2288 function that can join an arbitrary number of extra strings onto a growing
2289 string.
2290
2291 (c) The code for expansion conditions now uses a table and a binary chop
2292 instead of a serial search (which was left over from when there were very
2293 few conditions). Also, it now recognizes conditions like "pam" even when
2294 the relevant support is not compiled in: a suitably worded error message is
2295 given if an attempt is made to use such a condition.
2296
229711. Added ${time_interval:xxxxx}.
2298
229912. A bug was causing one of the ddress fields not to be passed back correctly
2300 from remote delivery subprocesses. The field in question was not being
2301 subsequently used, so this caused to problems in practice.
2302
230313. Added new log selectors queue_time and deliver_time.
2304
230514. Might have fixed a bug in maildirsizefile handling that threw up
2306 "unexpected character" debug warnings, and recalculated the data
2307 unnecessarily. In any case, I expanded the warning message to give more
2308 information.
2309
231015. Added the message "Restricted characters in address" to the statements in
2311 the default ACL that block characters like @ and % in local parts.
2312
231316. Change 71 for release 4.31 proved to be much less benign that I imagined.
2314 Three changes have been made:
2315
2316 (a) There was a serious bug; a negative response to MAIL caused the whole
2317 recipient domain to be cached as invalid, thereby blocking all messages
2318 to all local parts at the same domain, from all senders. This bug has
2319 been fixed. The domain is no longer cached after a negative response to
2320 MAIL if the sender used is not empty.
2321
2322 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2323 been restored.
2324
2325 (c) A new callout option, "use_sender" has been added for people who want
2326 the modified behaviour.
2327
2328
2329Exim version 4.31
2330-----------------
2331
2332 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2333 Larry Rosenman.
2334
2335 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2336 indeed breaks things for older releases.
2337
2338 3. Added additional logging to the case where there is a problem reading data
2339 from a filter that is running in a subprocess using a pipe, in order to
2340 try to track down a specific problem.
2341
2342 4. Testing facility fudge: when running in the test harness and attempting
2343 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2344 getting "No route to host". Convert this to a timeout.
2345
2346 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2347 warning.
2348
2349 6. Some OS don't have socklen_t but use size_t instead. This affects the
2350 fifth argument of getsockopt() amongst other things. This is now
2351 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2352 can be set for individual OS. I have set it for SunOS5, OSF1, and
2353 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2354 some earlier ones do not.
2355
2356 7. Change 4.30/15 was not doing the test caselessly.
2357
2358 8. The standard form for an IPv6 address literal was being rejected by address
2359 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2360 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2361 this, as well as the form without the "IPv6" on the front (but only when
2362 address literals are enabled, of course).
2363
2364 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2365
236610. Exim crashed if a message with an empty sender address specified by -f
2367 encountered a router with an errors_to setting. This could be provoked only
2368 by a command such as
2369
2370 exim -f "" ...
2371
2372 where an empty string was supplied; "<>" did not hit this bug.
2373
237411. Installed PCRE release 4.5.
2375
237612. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2377 remained set. It is now erased.
2378
237913. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2380 times from message ids (which are base 36 rather than the normal 62).
2381
238214. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2383 were being counted as actual protocol errors, and logged if the log
2384 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2385 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2386 and DATA following a set of rejected RCPTs do not count as protocol errors.
2387 In other words, Exim assumes they were pipelined, though this may not
2388 actually be the case. Of course, in all cases the client gets an
2389 appropriate error code.
2390
239115. If a lookup fails in an ACL condition, a message about the failure may
2392 be available; it is used if testing the ACL cannot continue, because most
2393 such messages specify what the cause of the deferral is. However, some
2394 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2395 that caused an old message to be retained and used if a later statement
2396 caused a defer, replacing the real cause of the deferral.
2397
239816. If an IP address had so many PTR records that the DNS lookup buffer
2399 was not large enough to hold them, Exim could crash while trying to process
2400 the truncated data. It now detects and logs this case.
2401
240217. Further to 4.21/58, another change has been made: if (and only if) the
2403 first line of a message (the first header line) ends with CRLF, a bare LF
2404 in a subsequent header line has a space inserted after it, so as not to
2405 terminate the header.
2406
240718. Refactoring: tidied an ugly bit of code in appendfile that copied data
2408 unnecessarily, used atoi() instead of strtol(), and didn't check the
2409 termination when getting file sizes from file names by regex.
2410
241119. Completely re-implemented the support for maildirsize files, in the light
2412 of a number of problems with the previous contributed implementation
2413 (4.30/29). In particular:
2414
2415 . If the quota is zero, the maildirsize file is maintained, but no quota is
2416 imposed.
2417
2418 . If the maildir directory does not exist, it is created before any attempt
2419 to write a maildirsize file.
2420
2421 . The quota value in the file is just a cache; if the quota is changed in
2422 the transport, the new value overrides.
2423
2424 . A regular expression is available for excluding directories from the
2425 count.
2426
242720. The autoreply transport checks the characters in options that define the
2428 message's headers; it allows continued headers, but it was checking with
2429 isspace() after an embedded newline instead of explicitly looking for a
2430 space or a tab.
2431
243221. If all the "regular" hosts to which an address was routed had passed their
2433 expiry times, and had not reached their retry times, the address was
2434 bounced, even if fallback hosts were defined. Now Exim should go on to try
2435 the fallback hosts.
2436
243722. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2438 equivalent code in the SMTP transport. Some hosts send humungous responses
2439 to HELO/EHLO, more than 1024 it seems.
2440
244123. Refactoring: code in filter.c used (void *) for "any old type" but this
2442 gives compiler warnings in some environments. I've now done it "properly",
2443 using a union.
2444
244524. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2446 (because of problems with the built-in one) was declared to return uschar *
2447 instead of char *, causing compiler failure.
2448
244925. Fixed a file descriptor leak when processing alias/forward files.
2450
245126. Fixed a minor format string issue in dbfn.c.
2452
245327. Typo in exim.c: ("dmbnz" for "dbmnz").
2454
245528. If a filter file refered to $h_xxx or $message_headers, and the headers
2456 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2457 become corrupted.
2458
245929. When a sender address is verified, it is cached, to save repeating the test
2460 when there is more than one recipient in a message. However, when the
2461 verification involves a callout, it is possible for different callout
2462 options to be set for different recipients. It is too complicated to keep
2463 track of this in the cache, so now Exim always runs a verification when a
2464 callout is required, relying on the callout cache for the optimization.
2465 The overhead is duplication of the address routing, but this should not be
2466 too great.
2467
246830. Fixed a bug in callout caching. If a RCPT command caused the sender address
2469 to be verified with callout=postmaster, and the main callout worked but the
2470 postmaster check failed, the verification correctly failed. However, if a
2471 subsequent RCPT command asked for sender verification *without* the
2472 postmaster check, incorrect caching caused this verification also to fail,
2473 incorrectly.
2474
247531. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2476 it was not caching the DNS options (qualify_single, search_parents) that
2477 were used when the lookup failed. A subsequent lookup with different
2478 options therefore always gave the same answer, though there were cases
2479 where it should not have. (Example: a "domains = !$mx_any" option on a
2480 dnslookup router: the "domains" option is always processed without any
2481 widening, but the router might have qualify_single set.) Now Exim uses the
2482 cached value only when the same options are set.
2483
248432. Added John Jetmore's "exipick" utility to the distribution.
2485
248633. GnuTLS: When an attempt to start a TLS session fails for any reason other
2487 than a timeout (e.g. a certificate is required, and is not provided), an
2488 Exim server now closes the connection immediately. Previously it waited for
2489 the client to close - but if the client is SSL, it seems that they each
2490 wait for each other, leading to a delay before one of them times out.
2491
249234: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2493 maintained 0.8.x compatibility because I don't think many are using it, and
2494 it is clearly obsolete.
2495
249635. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2497 transport.
2498
249936. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2500 client certificate was expired. A simple patch fixes this, though I don't
2501 understand the full logic of why the verify callback is called multiple
2502 times.
2503
250437. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2505 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2506 which causes problems with some clients (such as the Certicom SSL Plus
2507 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2508 disables the coutermeasure allowing Eudora to connect."
2509
251038. Exim was not checking that a write() to a log file succeeded. This could
2511 lead to Bad Things if a log got too big, in particular if it hit a file
2512 size limit. Exim now panics and dies if it cannot write to a log file, just
2513 as it does if it cannot open a log file.
2514
251539. Modified OS/Makefile-Linux so that it now contains
2516
2517 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2518
2519 The two -D definitions ensure that Exim is compiled with large file
2520 support, which makes it possible to handle log files that are bigger than
2521 2^31.
2522
252340. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2524 instance) a domain was checked against a named list that involved a lookup,
2525 causing $domain_data to be set, then another domain was checked against the
2526 same list, then the first domain was re-checked, the value of $domain_data
2527 after the final check could be wrong. In particular, if the second check
2528 failed, it could be set empty. This bug probably also applied to
2529 $localpart_data.
2530
253141. The strip_trailing_dot option was not being applied to the address given
2532 with the -f command-line option.
2533
253442. The code for reading a message's header from the spool was incrementing
2535 $received_count, but never initializing it. This meant that the value was
2536 incorrect (doubled) while delivering a message in the same process in which
2537 it was received. In the most common configuration of Exim, this never
2538 happens - a fresh exec is done - but it can happen when
2539 deliver_drop_privilege is set.
2540
254143. When Exim logs an SMTP synchronization error - client data sent too soon -
2542 it now includes up to 150 characters of the unexpected data in the log
2543 line.
2544
254544. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2546 and building data strings. The size of both of these buffers was 10 000
2547 bytes - far larger than anybody would *ever* want, thought I. Needless to
2548 say, somebody hit the limit. I have increased the maximum line length to
2549 20 000 and the maximum data length of concatenated lines to 100 000. I have
2550 also fixed two bugs, because there was no checking on these buffers. Tsk,
2551 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2552 buffer is too small.
2553
255445. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2555 lsearch lookups. Now it does.
2556
255746. When parsing a route_list item in a manualroute router, a fixed-length
2558 buffer was used for the list of hosts. I made this 1024 bytes long,
2559 thinking that nobody would ever have a list of hosts that long. Wrong.
2560 Somebody had a whole pile of complicated expansion conditions, and the
2561 string was silently truncated, leading to an expansion error. It turns out
2562 that it is easier to change to an unlimited length (owing to other changes
2563 that have happened since this code was originally written) than to build
2564 structure for giving a limitation error. The length of the item that
2565 expands into the list of hosts is now unlimited.
2566
256747. The lsearch lookup could not handle data where the length of text line was
2568 more than 4095 characters. Such lines were truncated, leading to shortened
2569 data being returned. It should now handle lines of any length.
2570
257148. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2572 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2573 ACL").
2574
257549. Cosmetic tidy to scripts like exicyclog that are generated by globally
2576 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2577 no longer happens in comment lines. A list of replacements is now placed
2578 at the head of all of the source files, except those whose only change is
2579 to replace PERL_COMMAND in the very first #! line.
2580
258150. Replaced the slow insertion sort in queue.c, for sorting the list of
2582 messages on the queue, with a bottom-up merge sort, using code contributed
2583 by Michael Haardt. This should make operations like -bp somewhat faster on
2584 large queues. It won't affect queue runners, except when queue_run_in_order
2585 is set.
2586
258751. Installed eximstats 1.31 in the distribution.
2588
258952. Added support for SRV lookups to the dnslookup router.
2590
259153. If an ACL referred to $message_body or $message_body_end, the value was not
2592 reset for any messages that followed in the same SMTP session.
2593
259454. The store-handling optimization for building very long strings was not
2595 differentiating between the different store pools. I don't think this
2596 actually made any difference in practice, but I've tidied it.
2597
259855. While running the routers to verify a sender address, $sender_address
2599 was still set to the sender address. This is wrong, because when routing to
2600 send a bounce to the sender, it would be empty. Therefore, I have changed
2601 it so that, while verifying a sender address, $sender_address is set to <>.
2602 (There is no change to what happens when verifying a recipient address.)
2603
260456. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2605 target A or AAAA records (if not already returned) without resetting the
2606 qualify_single or search_parents options of the DNS resolver. These are
2607 inappropriate in this case because the targets of MX and SRV records must
2608 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2609 target that, when qualified, matched something in the local domain. These
2610 two options are now turned off when doing these lookups.
2611
261257. It seems that at least some releases of Reiserfs (which does not have the
2613 concept of a fixed number of inodes) returns zero and not -1 for the
2614 number of available inodes. This interacted badly with check_spool_inodes,
2615 which assumed that -1 was the "no such thing" setting. What I have done is
2616 to check that the total number of inodes is greater than zero before doing
2617 the test of how many are available.
2618
261958. When a "warn" ACL statement has a log_message modifier, the message is
2620 remembered, and not repeated. This is to avoid a lot of repetition when a
2621 message has many recipients that cause the same warning to be written.
2622 Howewer, Exim was preserving the list of already written lines for an
2623 entire SMTP session, which doesn't seem right. The memory is now reset if a
2624 new message is started.
2625
262659. The "rewrite" debugging flag was not showing the result of rewriting in the
2627 debugging output unless log_rewrite was also set.
2628
262960. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2630 of (int)(handle) when we know that handle contains (void *)(-1).
2631
263261. The Exim daemon panic-logs an error return when it closes the incoming
2633 connection. However "connection reset by peer" seems to be common, and
2634 isn't really an error worthy of noting specially, so that particular error
2635 is no long logged.
2636
263762. When Exim is trying to find all the local interfaces, it used to panic and
2638 die if the ioctl to get the interface flags failed. However, it seems that
2639 on at least one OS (Solaris 9) it is possible to have an interface that is
2640 included in the list of interfaces, but for which you get a failure error
2641 for this call. This happens when the interface is not "plumbed" into a
2642 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2643 failure of the "get flags" call assumes that the interface is down.
2644
264563. Added a ${eval10: operator, which assumes all numbers are decimal. This
2646 makes life easier for people who are doing arithmetic on fields extracted
2647 from dates, where you often get leading zeros that should not be
2648 interpreted as octal.
2649
265064. Added qualify_domain to the redirect router, to override the global
2651 setting.
2652
265365. If a pathologically long header line contained very many addresses (the
2654 report of this problem mentioned 10 000) and each of them was rewritten,
2655 Exim could use up a very large amount of memory. (It kept on making new
2656 copies of the header line as it rewrote, and never released the old ones.)
2657 At the expense of a bit more processing, the header rewriting function has
2658 been changed so that it no longer eats memory in this way.
2659
266066. The generation of the Received: header has been moved from the time that a
2661 message starts to be received, to the time that it finishes. The timestamp
2662 in the Received: header should now be very close to that of the <= log
2663 line. There are two side-effects of this change:
2664
2665 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2666 logged header lines no longer include the local Received: line, because
2667 it has not yet been created. The same applies to a copy of the message
2668 that is returned to a non-SMTP sender when a message is rejected.
2669
2670 (b) When a filter file is tested using -bf, no additional Received: header
2671 is added to the test message. After some thought, I decided that this
2672 is a bug fix.
2673
2674 This change does not affect the value of $received_for. It is still set
2675 after address rewriting, but before local_scan() is called.
2676
267767. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2678
267968. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2680 gave an unhelpful panic error message, and a defer error. I have managed to
2681 change this behaviour so that it now rejects any supplied certificate,
2682 which seems right, as the list of acceptable certificates is empty.
2683
268469. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2685 gave an unhelpful defer error. I have not managed to make this reject any
2686 supplied certificates, but the error message it gives is "no certificate
2687 supplied", which is not helpful.
2688
268970. exigrep's output now also includes lines that are not associated with any
2690 message, but which match the given pattern. Implemented by a patch from
2691 Martin Sluka, which also tidied up the Perl a bit.
2692
269371. Recipient callout verification, like sender verification, was using <> in
2694 the MAIL FROM command. This isn't really the right thing, since the actual
2695 sender may affect whether the remote host accepts the recipient or not. I
2696 have changed it to use the actual sender in the callout; this means that
2697 the cache record is now keyed on a recipient/sender pair, not just the
2698 recipient address. There doesn't seem to be a real danger of callout loops,
2699 since a callout by the remote host to check the sender would use <>.
2700 [SEE ABOVE: changed after hitting problems.]
2701
270272. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2703 temporary errors. However, in the case of such a code being given after
2704 the end of a data transmission (i.e. after ".") Exim was failing to write
2705 a retry record for the message. (Yes, there was some broken host that was
2706 actually sending 8xx at this point.)
2707
270873. An unknown lookup type in a host list could cause Exim to panic-die when
2709 the list was checked. (An example that provoked this was putting <; in the
2710 middle of a list instead of at the start.) If this happened during a DATA
2711 ACL check, a -D file could be left lying around. This kind of configuration
2712 error no longer causes Exim to die; instead it causes a defer errror. The
2713 incident is still logged to the main and panic logs.
2714
271574. Buglet left over from Exim 3 conversion. The message "too many messages
2716 in one connection" was written to the rejectlog but not the mainlog, except
2717 when address rewriting (yes!) was being logged.
2718
271975. Added write_rejectlog option.
2720
272176. When a system filter was run not as root (that is, when system_filter_user
2722 was set), the values of the $n variables were not being returned to the
2723 main process; thus, they were not subsequently available in the $sn
2724 variables.
2725
272677. Added +return_path_on_delivery log selector.
2727
272878. A connection timeout was being treated differently from recipients deferred
2729 when testing hosts_max_try with a message that was older than the host's
2730 retry timeout. (The host should not be counted, thus allowing all hosts to
2731 be tried at least once before bouncing.) This may have been the cause of an
2732 occasionally reported bug whereby a message would remain on the queue
2733 longer than the retry timeout, but would be bounced if a delivery was
2734 forced. I say "may" because I never totally pinned down the problem;
2735 setting up timeout/retry tests is difficult. See also the next item.
2736
273779. The ultimate address timeout was not being applied to errors that involved
2738 a combination of host plus message (for example, a timeout on a MAIL
2739 command). When an address resolved to a number of possible hosts, and they
2740 were not all tried for each delivery (e.g. because of hosts_max_try), a
2741 message could remain on the queue longer than the retry timeout.
2742
274380. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2744 Haardt.
2745
274681. Fixed an obscure SMTP outgoing bug which required at least the following
2747 conditions: (a) there was another message waiting for the same server;
2748 (b) the server returned 5xx to all RCPT commands in the first message so
2749 that the message was not completed; (c) the server dropped the connection
2750 or gave a negative response to the RSET that Exim sends to abort the
2751 transaction. The observed case was a dropped connection after DATA that had
2752 been sent in pipelining mode. That is, the server had advertised PIPELINING
2753 but was not implementing it correctly. The effect of the bug was incorrect
2754 behaviour, such as trying another host, and this could lead to a crash.
2755
2756
2757Exim version 4.30
2758-----------------
2759
2760 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2761 and daemon.c were passed as pointers to ints; they should have been
2762 pointers to socklen_t variables (which are typically unsigned ints).
2763
2764 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2765 fixed.
2766
2767 3. Fixed a really odd bug that affected only the testing scheme; patching a
2768 certain fixed string in the binary changed the value of another string that
2769 happened to be identical to the end of the original first string.
2770
2771 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2772 name", it returns that address as the IP address. On some operating
2773 systems (e.g. Solaris), it also passes back the IP address string as the
2774 "host name". However, on others (e.g. Linux), it passes back an empty
2775 string. Exim wasn't checking for this, and was changing the host name to an
2776 empty string, assuming it had been canonicized.
2777
2778 5. Although rare, it is permitted to have more than one PTR record for a given
2779 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2780 all the names associated with an address, because they do in Solaris.
2781 However, it seems that they do not in Linux for data that comes from the
2782 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2783 I found this out when I moved to a new Linux workstation and tried to run
2784 the Exim test suite.
2785
2786 To get round this problem I have changed the code so that it now does its
2787 own call to the DNS to look up PTR records when searching for a host name.
2788 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2789 addresses that are only in /etc/hosts are still found.
2790
2791 This behaviour is, however, controlled by an option called host_lookup_
2792 order, which defaults to "bydns:byaddr". If people want to use the other
2793 order, or indeed, just use one or the other means of lookup, they can
2794 specify it in this variable.
2795
2796 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2797 some operating systems, this comes back from gethostbyaddr() as an empty
2798 string, and this is what Exim used to test for. However, it seems that in
2799 other systems, "." is yielded. Exim now tests for this case too.
2800
2801 7. The values of check_spool_space and check_log_space are now held internally
2802 as a number of kilobytes instead of an absolute number of bytes. If a
2803 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2804 kilobyte. This means that much larger values can be stored.
2805
2806 8. Exim monitor: an attempt to get the action menu when not actually pointing
2807 at a message produces an empty menu entitled "No message selected". This
2808 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2809 no entries in it ("Shell widget menu has zero width and/or height"). So I
2810 have added a single, blank menu entry in this case.
2811
2812 9. Added ${quote_local_part.
2813
281410. MIME decoding is now applied to the contents of Subject: header lines when
2815 they are logged.
2816
281711. Now that a reference to $sender_host_address automatically causes a reverse
2818 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2819 host lookup before query-style lookups in lists that might use this
2820 variable. This has therefore been abolished, and the "net-" prefix is no
2821 longer necessary for query-style lookups.
2822
282312. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2824 have been a typo for LFLAGS, so it has been changed.
2825
282613. The install script calls Exim with "-C /dev/null" in order to find the
2827 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2828 to be output. Howeve, since Exim outputs its version number before the
2829 error, it didn't break the script. It just looked ugly. I fixed this by
2830 always allowing "-C /dev/null" if the caller is root.
2831
283214. Ignore overlarge ACL variable number when reading spool file - insurance
2833 against a later release with more variables having written the file.
2834
283515. The standard form for an IPv6 address literal was being rejected by EHLO.
2836 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2837 this, as well as the form without the "IPv6" on the front.
2838
283916. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2840 OS/Makefile-Darwin file.
2841
284217. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2843 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2844
284518. After change 4.21/52, "%ld" was used to format the contents of the $inode
2846 variable. However, some OS use ints for inodes. I've added cast to long int
2847 to get rid of the compiler warning.
2848
284919. I had forgotten to lock out "/../" in configuration file names when
2850 ALT_CONFIG_PREFIX was set.
2851
285220. Routers used for verification do not need to specify transports. However,
2853 if such a router generated a host list, and callout was configured, Exim
2854 crashed, because it could not find a port number from the (non-existent)
2855 transport. It now assumes port 25 in this circumstance.
2856
285721. Added the -t option to exigrep.
2858
285922. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2860 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2861 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2862 them is set, LOOKUP_LSEARCH is forced.
2863
286423. "exim -bV" now outputs a list of lookups that are included in the binary.
2865
286624. Added sender and host information to the "rejected by local_scan()" log
2867 line; previously there was no indication of these.
2868
286925. Added .include_if_exists.
2870
287126. Change 3.952/11 added an explicit directory sync on top of a file sync for
2872 Linux. It turns out that not all file systems support this. Apparently some
2873 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2874 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2875 not supported on the file descriptor, is now ignored when Exim is trying to
2876 sync a directory. This applies only to Linux.
2877
287827. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2879
288028. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2881 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2882 this.
2883
288429. Added support for maildirsize files from supplied patch (modified a bit).
2885
288630. The use of :fail: followed by an empty string could lead Exim to respond to
2887 sender verification failures with (e.g.):
2888
2889 550 Verification failed for <xxx>
2890 550 Sender verify failed
2891
2892 where the first response line was missing the '-' that indicates it is not
2893 the final line of the response.
2894
289531. The loop for finding the name of the user that called Exim had a hardwired
2896 limit of 10; it now uses the value of finduser_retries, which is used for
2897 all other user lookups.
2898
289932. Added $received_count variable, available in data and not_smtp ACLs, and at
2900 delivery time.
2901
290233. Exim was neglecting to zero errno before one call of strtol() when
2903 expanding a string and expecting an integer value. On some systems this
2904 resulted in spurious "integer overflow" errors. Also, it was casting the
2905 result into an int without checking.
2906
290734. Testing for a connection timeout using "timeout_connect" in the retry rules
2908 did not work. The code looks as if it has *never* worked, though it appears
2909 to have been documented since at least releast 1.62. I have made it work.
2910
291135. The "timeout_DNS" error in retry rules, also documented since at least
2912 1.62, also never worked. As it isn't clear exactly what this means, and
2913 clearly it isn't a major issue, I have abolished the feature by treating it
2914 as "timeout", and writing a warning to the main and panic logs.
2915
291636. The display of retry rules for -brt wasn't always showing the error code
2917 correctly.
2918
291937. Added new error conditions to retry rules: timeout_A, timeout_MX,
2920 timeout_connect_A, timeout_connect_MX.
2921
292238. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2923 to the empty sender.
2924
292539. The daemon was not analysing the content of -oX till after it had closed
2926 stderr and disconnected from the controlling terminal. This meant that any
2927 syntax errors were only noted on the panic log, and the return code from
2928 the command was 0. By re-arranging the code a little, I've made the
2929 decoding happen first, so such errors now appear on stderr, and the return
2930 code is 1. However, the actual setting up of the sockets still happens in
2931 the disconnected process, so errors there are still only recorded on the
2932 panic log.
2933
293440. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2935 connections (as happens on some IP stacks) was logged at start up time as
2936 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2937 it from "IPv6 and IPv4", which means that two separate sockets are being
2938 used.
2939
294041. The debug output for gethostbyname2() or getipnodebyname() failures now
2941 says whether AF_INET or AF_INET6 was passed as an argument.
2942
294342. Exiwhat output was messed up when time zones were included in log
2944 timestamps.
2945
294643. Exiwhat now gives more information about the daemon's listening ports,
2947 and whether -tls-on-connect was used.
2948
294944. The "port" option of the smtp transport is now expanded.
2950
295145. A "message" modifier in a "warn" statement in a non-message ACL was being
2952 silently ignored. Now an error message is written to the main and panic
2953 logs.
2954
295546. There's a new ACL modifier called "logwrite" which writes to a log file
2956 as soon as it is encountered.
2957
295847. Added $local_user_uid and $local_user_gid at routing time.
2959
296048. Exim crashed when trying to verify a sender address that was being
2961 rewritten to "<>".
2962
296349. Exim was recognizing only a space character after ".include". It now also
2964 recognizes a tab character.
2965
296650. Fixed several bugs in the Perl script that creates the exim.8 man page by
2967 extracting the relevant information from the specification. The man page no
2968 longer contains scrambled data for the -d option, and I've added a section
2969 at the front about calling Exim under different names.
2970
297151. Added "extra_headers" argument to the "mail" command in filter files.
2972
297352. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2974 crash.
2975
297653. Installed eximstats 1.29.
2977
297854. Added transport_filter_timeout as a generic transport option.
2979
298055. Exim no longer adds an empty Bcc: header to messages that have no To: or
2981 Cc: header lines. This was required by RFC 822, but it not required by RFC
2982 2822.
2983
298456. Exim used to add From:, Date:, and Message-Id: header lines to any
2985 incoming messages that did not have them. Now it does so only if the
2986 message originates locally, that is, if there is no associated remote host
2987 address. When Resent- header lines are present, this applies to the Resent-
2988 lines rather than the non-Resent- lines.
2989
299057. Drop incoming SMTP connection after too many syntax or protocol errors. The
2991 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2992
299358. Messages for configuration errors now include the name of the main
2994 configuration file - useful now that there may be more than one file in a
2995 list (.included file names were always shown).
2996
299759. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2998 for those rare installations that do not start the daemon as root or run it
2999 setuid root. I've cut out the call to initgroups() if the daemon is not
3000 root at that time.
3001
300260. The Exim user and group can now be bound into the binary as text strings
3003 that are looked up at the start of Exim's processing.
3004
300561. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3006
300762. Added $mailstore_basename variable.
3008
300963. Installed patch to sieve.c from Michael Haardt.
3010
301164. When Exim failed to open the panic log after failing to open the main log,
3012 the original message it was trying to log was written to stderr and debug
3013 output, but if they were not available (the usual case in production), it
3014 was lost. Now it is written to syslog before the two lines that record the
3015 failures to open the logs.
3016
301765. Users' Exim filters run in subprocesses under the user's uid. It is
3018 possible for a "deliver" command or an alias in a "personal" command to
3019 provoke an address rewrite. If logging of address rewriting is configured,
3020 this fails because the process is not running as root or exim. There may be
3021 a better way of dealing with this, but for the moment (because 4.30 needs
3022 to be released), I have disabled address rewrite logging when running a
3023 filter in a non-root, non-exim process.
3024
3025
3026Exim version 4.24
3027-----------------
3028
3029 1. The buildconfig auxiliary program wasn't quoting the value set for
3030 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3031 not defined. This bug was masked in 4.22 by the effect that was fixed in
3032 change 4.23/1.
3033
3034 2. Some messages that were rejected after a message id was allocated were
3035 shown as "incomplete" by exigrep. It no longer does this for messages that
3036 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3037
3038 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3039 have allow_domain_literals set, the ID did not get logged in the <= line.
3040 Domain literals are now always recognized in Message-ID: header lines.
3041
3042 4. The first argument for a ${extract expansion item is the key name or field
3043 number. Leading and trailing spaces in this item were not being ignored,
3044 causing some misleading effects.
3045
3046 5. When deliver_drop_privilege was set, single queue runner processes started
3047 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3048 same command in the process it spins off) were not dropping privilege.
3049
3050 6. When the daemon running as "exim" started a queue runner, it always
3051 re-executed Exim in the spun-off process. This is a waste of effort when
3052 deliver_drop_privilege is set. The new process now just calls the
3053 queue-runner function directly.
3054
3055
3056Exim version 4.23
3057-----------------
3058
3059 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3060 HEADERS_CHARSET.
3061
3062 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3063 ignored. Though the use of -oP was forcing the writing of a pid file, it
3064 was always written to the default place.
3065
3066 3. If the message "no IP address found for host xxxx" is generated during
3067 incoming verification, it is now followed by identification of the incoming
3068 connection (so you can more easily find what provoked it).
3069
3070 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3071
3072 5. Added some features to "harden" Exim a bit more against certain attacks:
3073
3074 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3075 be put in Local/Makefile. This is like the never_users runtime option,
3076 but it cannot be overridden. The default setting is "root".
3077
3078 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3079 prefix string with which any file named in a -C command line option
3080 must start.
3081
3082 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3083 is retained for -C and -D only if the caller of Exim is root. Without
3084 it, the exim user may also use -C and -D and retain privilege.
3085
3086 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3087 command line option is disabled.
3088
3089 6. Macro names set by the -D option must start with an upper case letter, just
3090 like macro names defined in the configuration file.
3091
3092 7. Added "dereference=" facility to LDAP.
3093
3094 8. Two instances of the typo "uknown" in the source files are fixed.
3095
3096 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3097 the Configure-Makefile script screwed up while processing it.
3098
309910. Incorporated PCRE 4.4.
3100
310111. The SMTP synchronization check was not operating right at the start of an
3102 SMTP session. For example, it could not catch a HELO sent before the client
3103 waited for the greeting. There is now a check for outstanding input at the
3104 point when the greeting is written. Because of the duplex, asynchronous
3105 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3106 way, but not yet received, when the check is performed.
3107
310812. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3109 on TCP/IP sockets, because this apparently causes some broken clients to
3110 timeout.
3111
311213. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3113 unchanged) from the Cygwin maintainer.
3114
311514. The code for -bV that shows what is in the binary showed "mbx" when maildir
3116 was supported instead of testing for mbx. Effectively a typo.
3117
311815. The spa authenticator server code was not checking that the input it
3119 received was valid base64.
3120
312116. The debug output line for the "set" modifier in ACLs was not showing the
3122 name of the variable that was being set.
3123
312417. Code tidy: the variable type "vtype_string" was never used. Removed it.
3125
312618. Previously, a reference to $sender_host_name did not cause a DNS reverse
3127 lookup on its own. Something else was needed to trigger the lookup. For
3128 example, a match in host_lookup or the need for a host name in a host list.
3129 Now, if $sender_host_name is referenced and the host name has not yet been
3130 looked up, a lookup is performed. If the lookup fails, the variable remains
3131 empty, and $host_lookup_failed is set to "1".
3132
313319. Added "eqi" as a case-independent comparison operator.
3134
313520. The saslauthd authentication condition could segfault if neither service
3136 nor realm was specified.
3137
313821. If an overflowing value such as "2048M" was set for message_size_limit, the
3139 error message that was logged was misleading, and incoming SMTP
3140 connections were dropped. The message is now more accurate, and temporary
3141 errors are given to SMTP connections.
3142
314322. In some error situations (such as 21 above) Exim rejects all SMTP commands
3144 (except RSET) with a 421 error, until QUIT is received. However, it was
3145 failing to send a response to QUIT.
3146
314723. The HELO ACL was being run before the code for helo_try_verify_hosts,
3148 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3149 ACL is now run after the helo_try_verify_hosts code.
3150
315124. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3152 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3153 case-independent, so other case variants are also recognized). Apparently
3154 some systems use these upper case variants.
3155
315625. If more than two messages were waiting for the same host, and a transport
3157 filter was specified for the transport, Exim sent two messages over the
3158 same TCP/IP connection, and then failed with "socket operation on non-
3159 socket" when it tried to send the third.
3160
316126. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3162
316327. The extern definition of crypt16() in expand.c was not being excluded when
3164 the OS had its own crypt16() function.
3165
316628. Added bounce_return_body as a new option, and bounce_return_size_limit
3167 as a preferred synonym for return_size_limit, both as an option and as an
3168 expansion variable.
3169
317029. Added LIBS=-liconv to OS/Makefile-OSF1.
3171
317230. Changed the default configuration ACL to relax the local part checking rule
3173 for addresses that are not in any local domains. For these addresses,
3174 slashes and pipe symbols are allowed within local parts, but the sequence
3175 /../ is explicitly forbidden.
3176
317731. SPA server authentication was not clearing the challenge buffer before
3178 using it.
3179
318032. log_message in a "warn" ACL statement was writing to the reject log as
3181 well as to the main log, which contradicts the documentation and doesn't
3182 seem right (because no rejection is happening). So I have stopped it.
3183
318433. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3185 However, I am unable to do any testing of this.
3186
318734. Fixed an infelicity in the appendfile transport. When checking directories
3188 for a mailbox, to see if any needed to be created, it was accidentally
3189 using path names with one or more superfluous leading slashes; tracing
3190 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3191
319235. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3193 contents are added to the log line that is written for every discarded
3194 recipient. (Previously a log_message setting was ignored.)
3195
319636. The ${quote: operator now quotes the string if it is empty.
3197
319837. The install script runs exim in order to find its version number. If for
3199 some reason other than non-existence or emptiness, which it checks, it
3200 could not run './exim', it was installing it with an empty version number,
3201 i.e. as "exim-". This error state is now caught, and the installation is
3202 aborted.
3203
320438. An argument was missing from the function that creates an error message
3205 when Exim fails to connect to the socket for saslauthd authentication.
3206 This could cause Exim to crash, or give a corrupted message.
3207
320839. Added isip, isip4, and isip6 to ${if conditions.
3209
321040. The ACL variables $acl_xx are now saved with the message, and can be
3211 accessed later in routers, transports, and filters.
3212
321341. The new lookup type nwildlsearch is like wildlsearch, except that the key
3214 strings in the file are not string-expanded.
3215
321642. If a MAIL command specified a SIZE value that was too large to fit into an
3217 int variable, the check against message_size_limit failed. Such values are
3218 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3219 day this will have to be increased, but I don't think I want to be around
3220 when emails are that large.
3221
3222
3223
3224Exim version 4.22
3225-----------------
3226
3227 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3228 iconv() is not standard in FreeBSD.
3229
3230 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3231 IPv6 enabled. The observed symptom was a segmentation fault on return from
3232 the function os_common_find_running_interfaces() in src/os.c.
3233
3234 3. In the check_special_case() function in daemon.c I had used "errno" as an
3235 argument name, which causes warnings on some systems. This was basically a
3236 typo, since it was named "eno" in the comments!
3237
3238 4. The code that waits for the clock to tick (at a resolution of some fraction
3239 of a second) so as to ensure message-id uniqueness was always waiting for
3240 at least one whole tick, when it could have waited for less. [This is
3241 almost certainly not relevant at current processor speeds, where it is
3242 unlikely to ever wait at all. But we try to future-proof.]
3243
3244 5. The function that sleeps for a time interval that includes fractions of a
3245 second contained a race. It did not block SIGALRM between setting the
3246 timer, and suspending (a couple of lines later). If the interval was short
3247 and the sigsuspend() was delayed until after it had expired, the suspension
3248 never ended. On busy systems this could lead to processes getting stuck for
3249 ever.
3250
3251 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3252 process, before it forks any delivery processes. The open lookup caching
3253 mechanism meant that the open file or database connection was passed into
3254 the delivery process. The problem was that delivery processes always tidy
3255 up cached lookup data. This could cause a problem for the next delivery
3256 process started by the queue runner, because the external queue runner
3257 process does not know about the closure. So the next delivery process
3258 still has data in the lookup cache. In the case of a file lookup, there was
3259 no problem because closing a file descriptor in a subprocess doesn't affect
3260 the parent. However, if the lookup was caching a connection to a database,
3261 the connection was closed, and the second delivery process was likely to
3262 see errors such as "PGSQL: query failed: server closed the connection
3263 unexpectedly". The problem has been fixed by closing all cached lookups
3264 in a queue runner before running a delivery process.
3265
3266 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3267 seem to have the "const" qualifier which it has on other OS. I've
3268 parameterised it.
3269
3270 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3271 *of the same type* (client or server) with the same public name that an
3272 error should be diagnosed.
3273
3274 9. When Exim looked up a host name for an IP address, but failed to find the
3275 original IP address when looking up the host name (a safety check), it
3276 output the message "<ip address> does not match any IP for NULL", which was
3277 confusing, to say the least. The bug was that the host name should have
3278 appeared instead of "NULL".
3279
328010. Since release 3.03, if Exim is called by a uid other than root or the Exim
3281 user that is built into the binary, and the -C or -D options is used, root
3282 privilege is dropped before the configuration file is read. In addition,
3283 logging is switched to stderr instead of the normal log files. If the
3284 configuration then re-defines the Exim user, the unprivileged environment
3285 is probably not what is expected, so Exim logs a panic warning message (but
3286 proceeds).
3287
3288 However, if deliver_drop_privilege is set, the unprivileged state may well
3289 be exactly what is intended, so the warning has been cut out in that case,
3290 and Exim is allowed to try to write to its normal log files.
3291
3292
3293Exim version 4.21
3294-----------------
3295
3296 1. smtp_return_error_details was not giving details for temporary sender
3297 or receiver verification errors.
3298
3299 2. Diagnose a configuration error if two authenticators have the same public
3300 name.
3301
3302 3. Exim used not to create the message log file for a message until the first
3303 delivery attempt. This could be confusing when incoming messages were held
3304 for policy or load reasons. The message log file is now created at the time
3305 the message is received, and an initial "Received" line is written to it.
3306
3307 4. The automatically generated man page for command line options had a minor
3308 bug that caused no ill effects; however, a more serious problem was that
3309 the procedure for building the man page automatically didn't always
3310 operate. Consequently, release 4.20 contains an out-of-date version. This
3311 shouldn't happen again.
3312
3313 5. When building Exim with embedded Perl support, the script that builds the
3314 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3315 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3316
3317 6. The freeze_tell option was not being used for messages that were frozen on
3318 arrival, either by an ACL or by local_scan().
3319
3320 7. Added the smtp_incomplete_transaction log selector.
3321
3322 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3323 was accepting AUTH without a new EHLO.
3324
3325 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3326 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3327 RFC.
3328
332910. Logging of TCP/IP connections (when configured) now happens in the main
3330 daemon process instead of the child process, so that the TCP/IP connection
3331 count is more accurate (but it can never be perfect).
3332
333311. The use of "drop" in a nested ACL was not being handled correctly in the
3334 outer ACL. Now, if condition failure induced by the nested "drop" causes
3335 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3336 or "require"), the connection is dropped.
3337
333812. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3339 that yield "discard" can now be used with an "accept" or a "discard" verb,
3340 but an error is generated for any others (because I can't see a useful way
3341 to define what should happen).
3342
334313. When an ACL is read dynamically from a file (or anywhere else), the lines
3344 are now processed in the same way as lines in the Exim configuration file.
3345 In particular, continuation lines are supported.
3346
334714. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3348
334915. Added -ti meaning -t -i.
3350
335116. Check for letters, digits, hyphens, and dots in the names of dnslist
3352 domains, and warn by logging if others are found.
3353
335417. At least on BSD, alignment is not guarenteed for the array of ifreq's
3355 returned from GIFCONF when Exim is trying to find the list of interfaces on
3356 a host. The code in os.c has been modified to copy each ifreq to an aligned
3357 structure in all cases.
3358
3359 Also, in some cases, the returned ifreq's were being copied to a 'struct
3360 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3361 means the last couple of bytes of an IPv6 address could be chopped if the
3362 ifreq contained only a normal sockaddr (14 bytes storage).
3363
336418. Named domain lists were not supported in the hosts_treat_as_local option.
3365 An entry such as +xxxx was not recognized, and was treated as a literal
3366 domain name.
3367
336819. Ensure that header lines added by a DATA ACL are included in the reject log
3369 if the ACL subsequently rejects the message.
3370
337120. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3372 MD5 (which is deprecated).
3373
337421. When testing a filter file using -bf, Exim was writing a message when it
3375 took the sender from a "From " line in the message, but it was not doing so
3376 when it took $return_path from a Return-Path: header line. It now does.
3377
337822. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3379 with a valid header line field name (a series of printing characters
3380 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3381
338223. Changed "disc" in the source to "disk" to conform to the documentation and
3383 the book and for uniformity.
3384
338524. Ignore Sendmail's -Ooption=value command line item.
3386
338725. When execve() failed while trying to run a command in a pipe transport,
3388 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3389 could be confused with a return value of 69 from the command itself. This
3390 has been changed to 127, the value the shell returns if it is asked to run
3391 a non-existent command. The wording for the related log line suggests a
3392 non-existent command as the problem.
3393
339426. If received_header_text expands to an empty string, do not add a Received:
3395 header line to the message. (Well, it adds a token one on the spool, but
3396 marks it "old" so that it doesn't get used or transmitted.)
3397
339827. Installed eximstats 1.28 (addition of -nt option).
3399
340028. There was no check for failure on the call to getsockname() in the daemon
3401 code. This can fail if there is a shortage of resources on the system, with
3402 ENOMEM, for example. A temporary error is now given on failure.
3403
340429. Contrary to the C standard, it seems that in some environments, the
3405 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3406 program. Exim now does this explicitly; it affects the formatting of
3407 timestamps using strftime().
3408
340930. If exiqsumm was given junk data, it threw up some uninitialized variable
3410 complaints. I've now initialized all the variables, to avoid this.
3411
341232. Header lines added by a system filter were not being "seen" during
3413 transport-time rewrites.
3414
341533. The info_callback() function passed to OpenSSL is set up with type void
3416 (*)(SSL *, int, int), as described somewhere. However, when calling the
3417 function (actually a macro) that sets it up, the type void(*)() is
3418 expected. I've put in a cast to prevent warnings from picky compilers.
3419
342034. If a DNS black list lookup found a CNAME record, but there were no A
3421 records associated with the domain it pointed at, Exim crashed.
3422
342335. If a DNS black list lookup returned more than one A record, Exim ignored
3424 all but the first. It now scans all returned addresses if a particular IP
3425 value is being sought. In this situation, the contents of the
3426 $dnslist_value variable are a list of all the addresses, separated by a
3427 comma and a space.
3428
342936. Tightened up the rules for host name lookups using reverse DNS. Exim used
3430 to accept a host name and all its aliases if the forward lookup for any of
3431 them yielded the IP address of the incoming connection. Now it accepts only
3432 those names whose forward lookup yields the correct IP address. Any other
3433 names are discarded. This closes a loophole whereby a rogue DNS
3434 administrator could create reverse DNS records to break through a
3435 wildcarded host restriction in an ACL.
3436
343737. If a user filter or a system filter that ran in a subprocess used any of
3438 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3439 the wrong values were passed to the pipe command ($thisaddress had the
3440 value of $0, $0 had the value of $1, etc). This bug was introduced by
3441 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3442
344338. Improved the line breaking for long SMTP error messages from ACLs.
3444 Previously, if there was no break point between 40 and 75 characters, Exim
3445 left the rest of the message alone. Two changes have been made: (a) I've
3446 reduced the minimum length to 35 characters; (b) if it can't find a break
3447 point between 35 and 75 characters, it looks ahead and uses the first one
3448 that it finds. This may give the occasional overlong line, but at least the
3449 remaining text gets split now.
3450
345139. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3452 file descriptors might be low, and that setting 1000 would always raise it.
3453 It turns out that in some environments, the limit is already over 1000 and
3454 that lowering it causes trouble. So now Exim takes care not to decrease it.
3455
345640. When delivering a message, the value of $return_path is set to $sender_
3457 address at the start of routing (routers may change the value). By an
3458 oversight, this default was not being set up when an address was tested by
3459 -bt or -bv, which affected the outcome if any router or filter referred to
3460 $return_path.
3461
346241. The idea of the "warn" ACL verb is that it adds a header or writes to the
3463 log only when "message" or "log_message" are set. However, if one of the
3464 conditions was an address verification, or a call to a nested ACL, the
3465 messages generated by the underlying test were being passed through. This
3466 no longer happens. The underlying message is available in $acl_verify_
3467 message for both "message" and "log_message" expansions, so it can be
3468 passed through if needed.
3469
347042. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3471 new expansion $bh_ to give the encoded byte string without charset
3472 translation. Translation happens only if iconv() is available; HAVE_ICONV
3473 indicates this at build time. HEADERS_CHARSET gives the charset to
3474 translate to; headers_charset can change it in the configuration, and
3475 "headers charset" can change it in an individual filter file.
3476
347743. Now that we have a default RFC 2047 charset (see above), the code in Exim
3478 that creates RFC 2047 encoded "words" labels them as that charset instead
3479 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3480 expansion operator; (ii) when Exim creates a From: line for a local
3481 message; (iii) when a header line is rewritten to include a "phrase" part.
3482
348344. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3484 buggy, causing it to skip the first lines of messages whose message ID
3485 ended in 'D'. This would not have bitten before Exim release 4.14, because
3486 message IDs were unlikely to end in 'D' before then. The effect was to have
3487 incorrect size information for certain domains.
3488
348945. #include "config.h" was missing at the start of the crypt16.c module. This
3490 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3491 noticed.
3492
349346. If there was a timeout during a "random" callout check, Exim treated it as
3494 a failure of the random address, and carried on sending RSET and the real
3495 address. If the delay was just some slowness somewhere, the response to the
3496 original RCPT would be taken as a response to RSET and so on, causing
3497 mayhem of various kinds.
3498
349947. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3500 when I implemented it. It didn't allow for the fact that some option values
3501 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3502 the right test for positive values.
3503
350448. Domain names in DNS records are case-independent. Exim always looks them up
3505 in lower case. Some resolvers return domain names in exactly the case they
3506 appear in the zone file, that is, they may contain uppercase letters. Not
3507 all resolvers do this - some return always lower case. Exim was treating a
3508 change of case by a resolver as a change of domain, similar to a widening
3509 of a domain abbreviation. This triggered its re-routing code and so it was
3510 trying to route what was effectively the same domain again. This normally
3511 caused routing to fail (because the router wouldn't handle the domain
3512 twice). Now Exim checks for this case specially, and just changes the
3513 casing of the domain that it ultimately uses when it transmits the message
3514 envelope.
3515
351649. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3517 module.
3518
351950. If a filter generated a file delivery with a non-absolute name (possible if
3520 no home directory exists for the router), the forbid_file option was not
3521 forbidding it.
3522
352351. Added '&' feature to dnslists, to provide bit mask matching in addition to
3524 the existing equality matching.
3525
352652. Exim was using ints instead of ino_t variables in some places where it was
3527 dealing with inode numbers.
3528
352953. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3530 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3531 called TMPDIR, and if it finds it is different, it changes its value.
3532
353354. The smtp_printf() function is now made available to local_scan() so
3534 additional output lines can be written before returning. There is also an
3535 smtp_fflush() function to enable the detection of a dropped connection.
3536 The variables smtp_input and smtp_batched_input are exported to
3537 local_scan().
3538
353955. Changed the default runtime configuration: the message "Unknown user"
3540 has been removed from the ACL, and instead placed on the localuser router,
3541 using the cannot_route_message feature. This means that any verification
3542 failures that generate their own messages won't get overridden. Similarly,
3543 the "Unrouteable address" message that was in the ACL for unverifiable
3544 relay addresses has also been removed.
3545
354656. Added hosts_avoid_esmtp to the smtp transport.
3547
354857. The exicyclog script was not checking for the esoteric option
3549 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3550 will work only if exicyclog is run under the appropriate euid.
3551
355258. Following a discussion on the list, the rules by which Exim recognises line
3553 endings on incoming messages have been changed. The -dropcr and drop_cr
3554 options are now no-ops, retained only for backwards compatibility. The
3555 following line terminators are recognized: LF CRLF CR. However, special
3556 processing applies to CR:
3557
3558 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3559 nor a local message in the state where . is a terminator.
3560
3561 (ii) If a bare CR is encountered in a header line, an extra space is added
3562 after the line terminator so as not to end the header. The reasoning
3563 behind this is that bare CRs in header lines are most likely either
3564 to be mistakes, or people trying to play silly games.
3565
356659. The size of a message, as listed by "-bp" or in the Exim monitor window,
3567 was being incorrectly given as 18 bytes larger than it should have been.
3568 This is a VOB (very old bug).
3569
357060. This may never have affected anything current, but just in case it has:
3571 When the local host is found other than at the start of a list of hosts,
3572 the local host, those with the same MX, and any that follow, are discarded.
3573 When the list in question was part of a longer list of hosts, the following
3574 hosts (not currently being processed) were also being discarded. This no
3575 longer happens. I'm not sure if this situation could ever has previously
3576 arisen.
3577
357861. Added the "/MX" feature to lists of hosts in the manualroute and query
3579 program routers.
3580
358162. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3582 header. This is something that is recommended in a new Internet Draft, and
3583 is something that is documented as being done by Sendmail. There are two
3584 possible values. For messages generated by the autoreply transport, Exim
3585 adds:
3586
3587 Auto-Submitted: auto-replied
3588
3589 whereas for all other generated messages (e.g. bounces) it adds
3590
3591 Auto-Submitted: auto-generated
3592
359363. The "personal" condition in filters now includes a test for the
3594 Auto-Submitted: header. If it contains the string "auto-" the message it
3595 not considered personal.
3596
359764. Added rcpt_include_affixes as a generic transport option.
3598
359965. Added queue_only_override (default true).
3600
360166. Added the syslog_duplication option.
3602
360367. If what should have been the first header line of a message consisted of
3604 a space followed by a colon, Exim was mis-interpreting it as a header line.
3605 It isn't of course - it is syntactically invalid and should therefore be
3606 treated as the start of the message body. The misbehaviour could have
3607 caused a number of strange effects, including loss of data in subsequent
3608 header lines, and spool format errors.
3609
361068. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3611 client host had authenticated. This control can now be exercised by an ACL
3612 for more flexibility.
3613
361469. By default, callouts do not happen when testing with -bh. There is now a
3615 variant, -bhc, which does actually run the callout code, including
3616 consulting and updating the callout cache.
3617
361870. Added support for saslauthd authentication, courtesy of Alexander
3619 Sabourenkov.
3620
362171. If statvfs() failed on the spool or log directories while checking their
3622 size for availability, Exim confusingly gave the error "space shortage".
3623 Furthermore, in debugging mode it crashed with a floating point exception.
3624 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3625 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3626 serious problem, Exim now writes to the main and panic logs when this
3627 happens, with details of the failure. It then refuses to accept the
3628 incoming message, giving the message "spool directory problem" or "log
3629 directory problem" with a 421 code for SMTP messages.
3630
363172. When Exim is about to re-exec itself, it ensures that the file descriptors
3632 0, 1, and 2 exist, because some OS complain for execs without them (see
3633 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3634 descriptors. However, the code omitted to check that the open succeeded,
3635 causing mysterious errors if for some reason the permissions on /dev/null
3636 got screwed. Now Exim writes a message to the main and panic logs, and
3637 bombs out if it can't open /dev/null.
3638
363973. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3640 interact so that it is all more flexible. It is supposed to remain
3641 backwards compatible. Also added extra_local_interfaces.
3642
364374. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3644 to bomb out with an assertion failure - to the client this appears as a
3645 connection drop. This problem occurs in the part of the code that was taken
3646 from the Samba project. Fortunately, the assertion is in a very simple
3647 function, so I have fixed this by reproducing the function inline in the
3648 one place where it is called, and arranging for authentication to fail
3649 instead of killing the process with assert().
3650
365175. The SPA client code was not working when the server requested OEM rather
3652 than Unicode encoding.
3653
365476. Added code to make require_files with a specific uid setting more usable in
3655 the case where statting the file as root fails - usually a non-root-mounted
3656 NFS file system. When this happens and the failure is EACCES, Exim now
3657 forks a subprocess and does the per-uid checking as the relevant uid.
3658
365977. Added process_log_path.
3660
366178. If log_file_path was not explicitly set, a setting of check_log_space or
3662 check_log_inodes was ignored.
3663
366479. If a space check for the spool or log partitions fails, the incident is now
3665 logged. Of course, in the latter case the data may get lost...
3666
366780. Added the %p formatting code to string_format() so that it can be used to
3668 print addresses in debug_print(). Adjusted all the address printing in the
3669 debugging in store.c to use %p rather than %d.
3670
367181. There was a concern that a line of code in smtp_in.c could overflow a
3672 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3673 initially expressed, the concern was not well-founded, because trailing
3674 spaces are removed early. However, if the trailing spaces were followed by
3675 a NULL, they did not get removed, so the overflow was possible. Two fixes
3676 were applied:
3677
3678 (a) I re-wrote the offending code in a cleaner fashion.
3679 (b) If an incoming SMTP command contains a NULL character, it is rejected
3680 as invalid.
3681
368282. When Exim changes uid/gid to the Exim user at daemon start time, it now
3683 runs initgroups(), so that if the Exim user is in any additional groups,
3684 they will be used during message reception.
3685
3686
3687Exim version 4.20