Better debug diagnosis of malformed IPv4 addresses.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
1688f43b 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.292 2006/02/13 11:13:37 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
f78eb7c6
PH
119PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
122
21c28500
PH
123PH/21 Make -bV show the size of off_t variables so that the test suite can
124 decide whether to run tests for quotas > 2G.
125
126PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
127 mailbox_size, and mailbox_filecount in the appendfile transport. If a
128 filecount value is greater than 2G or if a quota value is greater than 2G
129 on a system where the size of off_t is not greater than 4, a panic error
130 is given.
131
1688f43b
PH
132PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
133 never match. The debug and -bh output now contains an explicit error
134 message indicating a malformed IPv4 address or mask.
135
136PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
137 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
138 PH/23 above applies.
139
1349e1e5 140
214e2000 141
5de37277
PH
142Exim version 4.60
143-----------------
144
cc38ddbf
PH
145PH/01 Two changes to the default runtime configuration:
146
147 (1) Move the checks for relay_from_hosts and authenticated clients from
148 after to before the (commented out) DNS black list checks.
149
150 (2) Add control=submission to the relay_from_hosts and authenticated
151 clients checks, on the grounds that messages accepted by these
152 statements are most likely to be submissions.
5de37277 153
72fdd6ae
PH
154PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
155
156 (1) Generate an error if the third argument for the ${prvs expansion is
157 not a single digit.
158
159 (2) Treat a missing third argument of ${prvscheck as if it were an empty
160 string.
161
162 (3) Reset the variables that are obtained from the first argument of
163 ${prvscheck and used in the second argument before leaving the code,
164 because their memory is reclaimed, so using them afterwards may do
165 silly things.
166
167 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
168 one (it's much easier than Tom thought :-).
169
170 (5) Because of (4), we can now allow for the use of $prvscheck_result
171 inside the third argument.
cb9328de 172
cb741023
PH
173PH/03 For some reason, the default setting of PATH when running a command from
174 a pipe transport was just "/usr/bin". I have changed it to
175 "/bin:/usr/bin".
176
f174f16e
PH
177PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
178 anything to be listed in the output from -bV.
b2f5a032 179
c25242d7
PH
180PH/05 When a filter generated an autoreply, the entire To: header line was
181 quoted in the delivery log line, like this:
182
183 => >A.N.Other <ano@some.domain> <original@ddress> ...
184
185 This has been changed so that it extracts the operative address. There
186 may be more than one such address. If so, they are comma-separated, like
187 this:
188
189 => >ano@some.domain,ona@other.domain <original@ddress> ...
190
82c19f95
PH
191PH/06 When a client host used a correct literal IP address in a HELO or EHLO
192 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
193 not being looked up in the rDNS to get a host name, Exim was showing the
194 IP address twice in Received: lines, even though the IP addresses were
195 identical. For example:
196
197 Received: from [1.2.3.4] (helo=[1.2.3.4])
198
199 However, if the real host name was known, it was omitting the HELO data
200 if it matched the actual IP address. This has been tidied up so that it
201 doesn't show the same IP address twice.
202
d7ffbc12
PH
203PH/07 When both +timestamp and +memory debugging was on, the value given by
204 $tod_xxx expansions could be wrong, because the tod_stamp() function was
205 called by the debug printing, thereby overwriting the timestamp buffer.
206 Debugging no longer uses the tod_stamp() function when +timestamp is set.
207
9f526266
PH
208PH/08 When the original message was included in an autoreply transport, it
209 always said "this is a copy of the message, including all the headers",
210 even if body_only or headers_only was set. It now gives an appropriate
211 message.
212
87fcc8b9
PH
213PH/09 Applied a patch from the Sieve maintainer which:
214
215 o fixes some comments
216 o adds the (disabled) notify extension core
217 o adds some debug output for the result of if/elsif tests
218 o points to the current vacation draft in the documentation
219 and documents the missing references header update
220
221 and most important:
222
223 o fixes a bug in processing the envelope test (when testing
224 multiple envelope elements, the last element determinted the
225 result)
226
456682f5
PH
227PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
228 Electronic Mail") by including:
229
230 Auto-submitted: auto-generated
231
232 in the messages that it generates (bounce messages and others, such as
233 warnings). In the case of bounce messages for non-SMTP mesages, there was
234 also a typo: it was using "Auto_submitted" (underscore instead of
235 hyphen). Since every message generated by Exim is necessarily in response
236 to another message, thes have all been changed to:
237
238 Auto-Submitted: auto-replied
239
240 in accordance with these statements in the RFC:
241
242 The auto-replied keyword:
243
244 - SHOULD be used on messages sent in direct response to another
245 message by an automatic process,
246
247 - MUST NOT be used on manually-generated messages,
248
249 - MAY be used on Delivery Status Notifications (DSNs) and Message
250 Disposition Notifications (MDNs),
251
252 - MUST NOT be used on messages generated by automatic or periodic
253 processes, except for messages which are automatic responses to
254 other messages.
255
3e46c1aa
PH
256PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
257 to the default Received: header definition.
456682f5 258
49826d12
PH
259PH/12 Added log selector acl_warn_skipped (default on).
260
eba0c039
PH
261PH/13 After a successful wildlsearch lookup, discard the values of numeric
262 variables because (a) they are in the wrong storage pool and (b) even if
263 they were copied, it wouldn't work properly because of the caching.
264
a0d6ba8a
PH
265PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
266 checking when decoding. Apparently there are clients that generate
267 overlong encoded strings. Why am I not surprised?
268
f0917727
PH
269PH/15 If the first argument of "${if match_address" was not empty, but did not
270 contain an "@" character, Exim crashed. Now it writes a panic log message
271 and treats the condition as false.
272
096fee00
PH
273PH/16 In autoreply, treat an empty string for "once" the same as unset.
274
024bd3c2
PH
275PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
276 extension "envelope-auth". The code is finished and in agreement with
277 other implementations, but there is no documentation so far and in fact,
278 nobody wrote the draft yet. This extension is currently #undef'ed, thus
279 not changing the active code.
280
281 Print executed "if" and "elsif" statements when debugging is used. This
282 helps a great deal to understand what a filter does.
283
284 Document more things not specified clearly in RFC3028. I had all this
285 sorted out, when out of a sudden new issues came to my mind. Oops."
286
df199fec
PH
287PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
288 (Bugzilla #53).
289
d27f1df3
PH
290PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
291 canonical form (as documented). However, after a host name lookup from
292 the IP address, check_host() was doing a simple string comparison with
293 addresses acquired from the DNS when checking that the found name did
294 have the original IP as one of its addresses. Since any found IPv6
295 addresses are likely to be in abbreviated form, the comparison could
296 fail. Luckily, there already exists a function for doing the comparison
297 by converting both addresses to binary, so now that is used instead of
298 the text comparison.
299
96776534
PH
300PH/20 There was another similar case to PH/19, when a complete host name was
301 given in a host list; looking up its IP address could give an abbreviated
302 form, whereas the current host's name might or might not be abbreviated.
303 The same fix has been applied.
304
5de37277 305
9a799bc0
PH
306Exim version 4.54
307-----------------
308
309PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
310 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
311 It now does.
312
99a4b039
PH
313PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
314 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
315
316PH/03 Typo: missing ".o" in src/pcre/Makefile.
317
4b233853
PH
318PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
319 header line, restrict the check to what is listed in RFCs 2369 and 2929.
320 Also, for "Auto-Submitted", treat anything other than "no" as
321 non-personal, in accordance with RFC 3834. (Previously it treated
322 anything starting "auto-" as non-personal.)
323
8857ccfd
PH
324TF/01 The control=submission/name=... option had a problem with syntax
325 errors if the name included a slash character. The /name= option
326 now slurps the rest of the string, so it can include any characters
327 but it must come last in the list of options (after /sender_retain
328 or /domain=).
329
433a2980
PH
330PH/05 Some modifications to the interface to the fake nameserver for the new
331 testing suite.
332
3e46c1aa 333
9a799bc0 334
e3a311ba
TK
335Exim version 4.53
336-----------------
337
338TK/01 Added the "success_on_redirect" address verification option. See
339 NewStuff for rationale and an example.
340
13b685f9
PH
341PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
342
395ff96d
PH
343PH/02 Patch to exigrep to allow it to work on syslog lines.
344
5b68f6e4
PH
345PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
346 fread() to skip over the body file's header line, because in Cygwin the
347 header line is locked and is inaccessible.
348
1ab52c69
PH
349PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
350 co-exist for some time) to make it clear that it is the Exim ID that is
351 referenced, not the Message-ID: header line.
352
b07e6aa3
PH
353PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
354 string_format() function, because snprintf() does not exist on all
355 operating systems.
356
254e032f
PH
357PH/06 The use of forbid_filter_existstest now also locks out the use of the
358 ${stat: expansion item.
359
3af76a81
PH
360PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
361 protocol synchronization error", to keep the pedants happy.
362
2548ba04
PH
363PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
364 well as for IRIX systems, when gcc is being used. See the host.c source
365 file for comments.
366
b6c6011d
PH
367PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
368
cf39cf57
PH
369PH/10 Named domain lists were not working if used in a queue_smtp_domains
370 setting.
371
f1513293
PH
372PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
373 transport and to the smtp transport in LMTP mode.
374
727549a4
PH
375TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
376
af46795e
PH
377PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
378 run a filter in a subprocess. This could lead to confusion in subsequent
379 lookups in the parent process. There should also be a search_tidyup() at
380 the end of the subprocess.
381
d7b47fd0
PH
382PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
383 only if the host matched helo_try_verify_hosts, which caused the
384 verification to occur when the EHLO/HELO command was issued. The ACL just
385 tested the remembered result. Now, if a previous verification attempt has
386 not happened, "verify = helo" does it there and then.
387
ee744174
JJ
388JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
389
b582ab87
PH
390TK/03 Fix log output including CR from clamd.
391
41a13e0a
PH
392PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
393 exist provoked a memory error which could cause a segfault.
394
f625cc5a
PH
395PH/15 Installed PCRE 6.2
396
397PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
398
21f7af35
PH
399PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
400 of the problem. Specifically, suggested +O2 rather than +O1 for the
401 HP-UX compiler.
402
31480e42
PH
403PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
404
2d280592
PH
405PH/20 If a delivery was routed to a non-standard port by means of an SRV
406 record, the port was not correctly logged when the outgoing_port log
407 selector was set (it logged the transort's default port).
408
7cd1141b
PH
409PH/21 Added support for host-specific ports to manualroute, queryprogram,
410 fallback_hosts, and "hosts" in the smtp transport.
411
412PH/22 If the log selector "outgoing_port" is set, the port is now also given on
413 host errors such as "Connection refused".
414
750af86e
PH
415PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
416 authentication with radiusclient 0.4.9:
417
418 - Error returned from rc_read_config was caught wrongly
419 - Username/password not passed on to radius server due to wrong length.
420
421 The presumption is that some radiusclient API changes for 4.51/PH/17
422 were not taken care of correctly. The code is still untested by me (my
423 Linux distribution still has 0.3.2 of radiusclient), but it was
424 contributed by a Radius user.
425
426PH/24 When doing a callout, the value of $domain wasn't set correctly when
427 expanding the "port" option of the smtp transport.
428
4304270b
TK
429TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
430 while reading a MIME header. Thanks to Tom Hughes for a patch.
431
750af86e
PH
432PH/24 Include config.h inside local_scan.h so that configuration settings are
433 available.
434
64ffc24f
PH
435PH/25 Make $smtp_command_argument available after all SMTP commands. This means
436 that in an ACL for RCPT (for example), you can examine exactly what was
437 received.
438
5dd9625b
PH
439PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
440 commands, but it was not correctly comparing the address with the actual
441 client host address. Thus, it would show the EHLO address in Received:
442 header lines when this was not necessary.
443
5591031b
PH
444PH/27 Added the % operator to ${eval:}.
445
ba18e66a
PH
446PH/28 Exim tries to create and chdir to its spool directory when it starts;
447 it should be ignoring failures (because with -C, for example, it has lost
448 privilege). It wasn't ignoring creation failures other than "already
449 exists".
450
9cec981f
PH
451PH/29 Added "crypteq" to the list of supported features that Exim outputs when
452 -bV or -d is used.
453
aa2b5c79
PH
454PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
455 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
456 too many continuations, the temporary file was not being removed, and the
457 return code was incorrect.
aa2b5c79 458
48a53b7f
PH
459PH/31 Missing "BOOL" in function definition in filtertest.c.
460
1c59d63b
PH
461PH/32 Applied Sieve patches from the maintainer.
462
671012da
TK
463TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
464
1509d3a8
PH
465PH/33 Added "verify = not_blind".
466
467PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
468 Local/Makefile (with some defaults set). These are used in built scripts
469 such as exicyclog, but they have never been used in the exim_install
470 script (though there are many overriding facilities there). I have
471 arranged that the exim_install script now takes note of these two
472 settings.
473
474PH/35 Installed configuration files for Dragonfly.
475
2fe1a124
PH
476PH/36 When a locally submitted message by a trusted user did not contain a
477 From: header, and the sender address was obtained from -f or from an SMTP
478 MAIL command, and the trusted user did not use -F to supply a sender
479 name, $originator_name was incorrectly used when constructing a From:
480 header. Furthermore, $originator_name was used for submission mode
481 messages from external hosts without From: headers in a similar way,
482 which is clearly wrong.
483
8800895a
PH
484PH/37 Added control=suppress_local_fixups.
485
ccfdb010
PH
486PH/38 When log_selector = +received_sender was set, and the addition of the
487 sender made the log line's construction buffer exactly full, or one byte
488 less than full, an overflow happened when the terminating "\n" was
489 subsequently added.
490
1130bfb0
PH
491PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
492 when the result of a list match is failure because a DNS lookup failed.
493
ebcb507f
PH
494PH/40 RM_COMMAND is now used in the building process.
495
c35e155c
PH
496PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
497 the "build-* directories that it finds.
498
95d1f782
PH
499PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
500 address in a domain literal was a prefix of an interface address.
501
fd6de02e
PH
502PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
503 when verifying a sender address, unless rewrite_headers is false.
504
58de37c5
PH
505PH/44 Wrote a long comment about why errors_to addresses are verified as
506 recipients, not senders.
507
261cf466
TF
508TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
509 the ratelimit ACL was added.
510
3ee512ff
PH
511PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
512
e08c430f
PH
513PH/46 Added extra information about PostgreSQL errors to the error string.
514
bef5a11f
PH
515PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
516 avoiding the need to install special zones in a real server. This is
517 backwards compatible; if it can't find the fake resolver, it drops back.
518 Thus, both old and new test suites can be run.
519
7546de58
TF
520TF/02 Added util/ratelimit.pl
521
e5d5a95f
TF
522TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
523 clock is set back in time.
524
2e88a017
TF
525TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
526 Candler <B.Candler@pobox.com>.
527
a5f65aa4
TF
528TF/05 The fix for PH/43 was not completely correct; widen_domains is always
529 OK for addresses that are the result of redirections.
530
e7726cbf
PH
531PH/48 A number of further additions for the benefit of the new test suite,
532 including a fake gethostbyname() that interfaces to the fake DNS resolver
533 (see PH/47 above).
534
a7fdad5b
TF
535TF/06 The fix for widen_domains has also been applied to qualify_single and
536 search_parents which are the other dnslookup options that can cause
537 header rewrites.
538
6af56900
PH
539PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
540 type ("H").
541
0925ede6
PH
542PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
543
66afa403
TF
544TF/07 Exim produced the error message "an SRV record indicated no SMTP
545 service" if it encountered an MX record with an empty target hostname.
546 The message is now "an MX or SRV record indicated no SMTP service".
547
0154e85a
TF
548TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
549 if the DNS of the sending site is misconfigured. This is quite a
550 common situation. This change restores the behaviour of treating a
551 helo verification defer as a failure.
552
16f12c76
PH
553PH/51 If self=fail was set on a router, the bounce message did not include the
554 actual error message.
555
bbe902f0 556
e5a9dba6
PH
557Exim version 4.52
558-----------------
559
560TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
561
22c3b60b
PH
562PH/01 When a transport filter timed out in a pipe delivery, and the pipe
563 command itself ended in error, the underlying message about the transport
564 filter timeout was being overwritten with the pipe command error. Now the
565 underlying error message should be appended to the second error message.
566
06a9b4b5
PH
567TK/01 Fix poll() being unavailable on Mac OSX 10.2.
568
c1ac6996
PH
569PH/02 Reduce the amount of output that "make" produces by default. Full output
570 can still be requested.
571
9c7a242c
PH
572PH/03 The warning log line about a condition test deferring for a "warn" verb
573 was being output only once per connection, rather than after each
574 occurrence (because it was using the same function as for successful
575 "warn" verbs). This seems wrong, so I have changed it.
576
87ba3f5f
PH
577TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
578 it should not have, which might have caused a crash in the right
579 circumstances, but probably never did.
580
581PH/04 Installed a modified version of Tony Finch's patch to make submission
582 mode fix the return path as well as the Sender: header line, and to
583 add a /name= option so that you can make the user's friendly name appear
584 in the header line.
585
29aba418
TF
586TF/03 Added the control = fakedefer ACL modifier.
587
fe0dab11
TF
588TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
589 Mark Lowes for thorough testing.
870f6ba8 590
11d337a4
TK
591TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
592
593TK/03 Merged latest SRS patch from Miles Wilton.
594
415c8f3b
PH
595PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
596 with the definition in sysexits.h (which is #included earlier).
597 Fortunately, Exim does not actually use EX_OK. The code used to try to
598 preserve the sysexits.h value, by assumimg that macro definitions were
599 scanned for macro replacements. I have been disabused of this notion,
600 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 601
958541e9
PH
602PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
603 in the smtp transport. When a block could not be written in a single
604 write() function, the timeout was being re-applied to each part-write.
605 This seems wrong - if the receiver was accepting one byte at a time it
606 would take for ever. The timeout is now adjusted when this happens. It
607 doesn't have to be particularly precise.
608
c206415f
TK
609TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
610 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
611
2a4be8f9
PH
612PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
613 without a domain if the check to <postmaster@domain> fails.
614
1cba11c5
SC
615SC/01 Eximstats: added -xls and the ability to specify output files
616 (patch written by Frank Heydlauf).
617
618SC/02 Eximstats: use FileHandles for outputing results.
619
620SC/03 Eximstats: allow any combination of xls, txt, and html output.
621
622SC/04 Eximstats: fixed display of large numbers with -nvr option
623
624SC/05 Eximstats: fixed merging of reports with empty tables.
625
626SC/06 Eximstats: added the -include_original_destination flag
627
628SC/07 Eximstats: removed tabs and trailing whitespace.
629
1005d00e
TK
630TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
631
632TK/06 MBOX spool code: Add real "From " MBOX separator line
633 so the .eml file is really in mbox format (even though
634 most programs do not really care). Patch from Alex Miller.
635
636TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
637 The latter is generated from $received_to and is only set if the
638 message has one envelope recipient. SA can use these headers,
639 obviously out-of-the-box. Patch from Alex Miller.
640
9b4768fa
PH
641PH/08 The ${def test on a variable was returning false if the variable's
642 value was "0", contrary to what the specification has always said!
643 The result should be true unless the variable is empty.
644
645PH/09 The syntax error of a character other than { following "${if
646 def:variable_name" (after optional whitespace) was not being diagnosed.
647 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
648 accidental colon was present, for example, could give incorrect results.
649
0d7eb84a
PH
650PH/10 Tidied the code in a number of places where the st_size field of a stat()
651 result is used (not including appendfile, where other changes are about
652 to be made).
653
654PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
655 This involved changing a lot of size variables from int to off_t. It
656 should work with maildirs and everything.
657
40727bee
TK
658TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
659 spamd dying while we are connected to it.
660
554d2369
TF
661TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
662 <jgh@wizmail.org>
663
1f922db1
PH
664PH/12 Applied Alex Kiernan's patch for the API change for the error callback
665 function for BDB 4.3.
666
ef213c3b
PH
667PH/13 Changed auto_thaw such that it does not apply to bounce messages.
668
8ac170f3
PH
669PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
670 the sources for PCRE have been re-arranged and more files are now
671 involved.
672
b1c749bb
PH
673PH/15 The code I had for printing potentially long long variables in PH/11
674 above was not the best (it lost precision). The length of off_t variables
675 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
676 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
677 to be "long long int" or "long int". This is needed for the internal
678 formatting function string_vformat().
b1c749bb 679
4aac9b49
PH
680PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
681 the configuration file to be ":syslog", then the script "guesses" where
682 the logs files are, rather than using the compiled in default. In our
683 case the guess is not the same as the compiled default, so the script
684 suddenly stopped working when I started to use syslog. The patch checks
685 to see if log_file_path is "". If so, it attempts to read it from exim
686 with no configuration file to get the compiled in version, before it
687 falls back to the previous guessing code."
688
294520c8
TK
689TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
690 implementing BATV in an Exim configuration. See NewStuff for the gory
691 details.
692
5bd022fe
PH
693PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
694 Makefile that are specific to HP-UX.
695
90e9ce59
PH
696PH/18 If the "use_postmaster" option was set for a recipient callout together
697 with the "random" option, the postmaster address was used as the MAIL
698 FROM address for the random test, but not for the subsequent recipient
699 test. It is now used for both.
700
5ea81592
PH
701PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
702 patch removes a few documentation additions to RFC 3028, because the
703 latest draft now contains them. It adds the new en;ascii-case comparator
704 and a new error check for 8bit text in MIME parts. Comparator and
705 require names are now matched exactly. I enabled the subaddress
706 extension, but it is not well tested yet (read: it works for me)."
707
c6c2dc1d
PH
708PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
709 rework some of the code of TK/09 above to avoid the hardwired use of
710 "%lld" and "long long". Replaced the call to snprintf() with a call to
711 string_vformat().
712
fffffe4c
PH
713PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
714 records point to non-existent hosts", "retry timeout exceeded", and
715 "retry time not reached for any host after a long failure period".
ca02eafb 716
9a26b6b2
PH
717PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
718 experimental DomainKeys support:
719
720 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
721 (2) On an error such as an illegally used "control", the wrong name for
722 the control was given.
723
724 These problems did NOT occur unless DomainKeys support was compiled.
725
4aee0225
PH
726PH/23 Added daemon_startup_retries and daemon_startup_sleep.
727
32d668a5
PH
728PH/24 Added ${if match_ip condition.
729
8187c3f3
PH
730PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
731 databases so that it will be absolutely obvious if a crash occurs in the
732 DB library. This is a regular occurrence (often caused by mis-matched
733 db.h files).
734
ff790e47 735PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
736 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
737 picked up on a user's system that detects such things. There doesn't seem
738 to be a gcc warning option for this - only an attribute that has to be
739 put on the function's prototype. It seems that in Fedora Core 4 they have
740 set this on a number of new functions. No doubt there will be more in due
741 course.
ff790e47 742
5417f6d1
PH
743PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
744 specify a transport. However, if an address that was verified by such a
745 router was the subject of a callout, Exim crashed because it tried to
746 read the rcpt_include_affixes from the non-existent transport. Now it
747 just assumes that the setting of that option is false. This bug was
748 introduced by 4.51/PH/31.
749
59cf8544
PH
750PH/28 Changed -d+all to exclude +memory, because that information is very
751 rarely of interest, but it makes the output a lot bigger. People tend to
752 do -d+all out of habit.
753
e7ad8a65
PH
754PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
755 code in os-type was giving problems when libc.so lives in lib64, like on
756 x86_64 Fedora Core.
757
ade42478
PH
758PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
759 aren't the modern standard, and it seems that some systems' include files
760 don't always have them. Exim was already checking for some of the newer
761 ones like T_AAAA, and defining it itself. I've added checks for all the
762 record types that Exim uses.
763
182ad5cf
PH
764PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
765 not automatically generating a new one, as it is supposed to. This
766 prevented TLS from working. If the file did exist, but contained invalid
767 data, a new version was generated, as expected. It was only the case of a
768 non-existent file that was broken.
769
b0d9fc80
TK
770TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
771 with a change in libdomainkeys > 0.64.
772
773TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
774 from DNS. If the selector record carries the flag, it now has
775 precedence over the domain-wide flag.
776
777TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
778
47c7a64a
PH
779PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
780 the use of a port name that isn't defined in /etc/services) occurred, the
781 message was deferred as in a normal delivery, and thus remained on the
782 spool, instead of being failed because of the mua_wrapper setting. This
783 is now fixed, and I tidied up some of the mua_wrapper messages at the
784 same time.
785
a388bce4
SC
786SC/08 Eximstats: whilst parsing the mainlog(s), store information about
787 the messages in a hash of arrays rather than using individual hashes.
788 This is a bit cleaner and results in dramatic memory savings, albeit
789 at a slight CPU cost.
790
791SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
792 as requested by Marc Sherman.
793
794SC/10 Eximstats: added histograms for user specified patterns as requested
795 by Marc Sherman.
796
0793e4ed
SC
797SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
798
c58b88df
PH
799PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
800 fopen() in the content-scanning modules that did not already have it.
801
e7ad8a65 802
7982096b
PH
803Exim version 4.51
804-----------------
805
1a46a8c5
PH
806TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
807 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
808
2f079f46 809TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
810
811TK/03 Fix ACL "regex" condition not being available in MIME ACL.
812
813PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
814 to test Sieve filters that use "vacation".
815
816PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
817 that changes the way the GnuTLS parameters are stored in the cache file.
818 The new format can be generated externally. For backward compatibility,
819 if the data in the cache doesn't make sense, Exim assumes it has read an
820 old-format file, and it generates new data and writes a new file. This
821 means that you can't go back to an older release without removing the
822 file.
823
824PH/03 A redirect router that has both "unseen" and "one_time" set does not
825 work if there are any delivery delays because "one_time" forces the
826 parent to be marked "delivered", so its unseen clone is never tried
827 again. For this reason, Exim now forbids the simultaneous setting of
828 these two options.
829
830PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
831 redirected to themselves ("homonym" addresses). Read the long ChangeLog
832 entry if you want to know the details. The fix, however, neglected to
833 consider the case when local delivery batching is involved. The test for
834 "previously delivered" was not happening when checking to see if an
835 address could be batched with a previous (undelivered) one; under
836 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 837 address.
1a46a8c5
PH
838
839PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
840 in its include files, and this causes problems building Exim.
841
842PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
843 header_syntax) but Exim was just ignoring anything given after a slash.
844 In particular, this caused confusion with an attempt to use "verify =
845 reverse_host_lookup/defer_ok". An error is now given when options are
846 supplied for verify items that do not have them. (Maybe reverse_host_
847 lookup should have a defer_ok option, but that's a different point.)
848
849PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
850 defined by RFC 821) to 2048, because there were problems with some AUTH
851 commands, and RFC 1869 says the size should be increased for extended
852 SMTP commands that take arguments.
853
854PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
855 Finch).
856
857PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
858 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 859
49c2d5ea
PH
860PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
861 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
862 whatever). Otherwise the password may appear in the log. Following change
863 PH/42 below, there is no longer a chance of it appearing in a bounce
864 message.
49c2d5ea 865
bf759a8b
PH
866PH/11 Installed exipick version 20050225.0 from John Jetmore.
867
83364d30
PH
868PH/12 If the last host in a fallback_hosts list was multihomed, only the first
869 of its addresses was ever tried. (Bugzilla bug #2.)
870
7999bbd7
PH
871PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
872 the result incorrectly in the debug output. (It correctly added a newline
873 to what was transported.)
874
7dbf77c9
PH
875TF/01 Added $received_time.
876
74e0617f
PH
877PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
878 commented out examples of how to interface to a virus scanner and to
879 SpamAssassin. Also added commented examples of av_scanner and
880 spamd_address settings.
881
2f079f46
PH
882PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
883 and controls are allowed in which ACLs. There were a couple of minor
884 errors. Some of the entries in the conditions table (which is a table of
885 where they are NOT allowed) were getting very unwieldy; rewrote them as a
886 negation of where the condition IS allowed.
887
8c841523
PH
888PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
889
7766a4f0
PH
890PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
891 header file does not have a version number, so I've had to invent a new
892 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
893 API. The code is untested by me (my Linux distribution still has 0.3.2 of
894 radiusclient), but it was contributed by a Radius user.
895
8b417f2c
PH
896PH/18 Installed Lars Mainka's patch for the support of CRL collections in
897 files or directories, for OpenSSL.
898
901f42cb
PH
899PH/19 When an Exim process that is running as root has to create an Exim log
900 file, it does so in a subprocess that runs as exim:exim so as to get the
901 ownership right at creation (otherwise, other Exim processes might see
902 the file with the wrong ownership). There was no test for failure of this
903 fork() call, which would lead to the process getting stuck as it waited
904 for a non-existent subprocess. Forks do occasionally fail when resources
905 run out. I reviewed all the other calls to fork(); they all seem to check
906 for failure.
907
f9b9210e
PH
908PH/20 When checking for unexpected SMTP input at connect time (before writing
909 the banner), Exim was not dealing correctly with a non-positive return
910 from the read() function. If the client had disconnected by this time,
911 the result was a log entry for a synchronization error with an empty
912 string after "input=" when read() returned zero. If read() returned -1
913 (an event I could not check), uninitialized data bytes were printed.
914 There were reports of junk text (parts of files, etc) appearing after
915 "input=".
916
54cdb463
PH
917PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
918
cf00dad6
PH
919PH/22 Added support for macro redefinition, and (re)definition in between
920 driver and ACL definitions.
921
acb1b346
PH
922PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
923 forgetting to use the resulting value; it was using the unexpanded value.
924
c5ddb310
PH
925PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
926 hadn't been configured. The fix is from Juergen Kreileder, who
927 understands it better than I do:
928
929 "Here's what I see happening with three configured cyrus_sasl
930 authenticators configured (plain, login, cram-md5):
931
932 On startup auth_cyrus_sasl_init() gets called for each of these.
933 This means three calls to sasl_listmech() without a specified mech_list.
934 => SASL tests which mechs of all available mechs actually work
935 => three warnings about OTP not working
936 => the returned list contains: plain, login, cram-md5, digest-md5, ...
937
938 With the patch, sasl_listmech() also gets called three times. But now
939 SASL's mech_list option is set to the server_mech specified in the the
940 authenticator. Or in other words, the answer from sasl_listmech()
941 gets limited to just the mech you're testing for (which is different
942 for each call.)
943 => the return list contains just 'plain' or 'login', 'cram-md5' or
944 nothing depending on the value of ob->server_mech.
945
946 I've just tested the patch: Authentication still works fine,
947 unavailable mechs specified in the exim configuration are still
948 caught, and the auth.log warnings about OTP are gone."
949
31619da6
PH
950PH/25 When debugging is enabled, the contents of the command line are added
951 to the debugging output, even when log_selector=+arguments is not
952 specified.
953
bebaf0fc
PH
954PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
955 answer is "GNU", and only if the return is "GNU/something" is the answer
956 "Linux".
957
475fe28a
PH
958PH/27 $acl_verify_message is now set immediately after the failure of a
959 verification in an ACL, and so is available in subsequent modifiers. In
960 particular, the message can be preserved by coding like this:
961
962 warn !verify = sender
963 set acl_m0 = $acl_verify_message
964
965 Previously, $acl_verify_message was set only while expanding "message"
966 and "log_message" when a very denied access.
967
7e8bec7a
PH
968PH/28 Modified OS/os.c-Linux with
969
970 -#ifndef OS_LOAD_AVERAGE
971 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
972
973 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
974 nomenclature these days.)
975
e4a89c47
PH
976PH/29 Installed patch from the Sieve maintainer that adds the options
977 sieve_useraddress and sieve_subaddress to the redirect router.
978
5ca2a9a1
PH
979PH/30 In these circumstances:
980 . Two addresses routed to the same list of hosts;
981 . First host does not offer TLS;
982 . First host accepts first address;
983 . First host gives temporary error to second address;
984 . Second host offers TLS and a TLS session is established;
985 . Second host accepts second address.
986 Exim incorrectly logged both deliveries with the TLS parameters (cipher
987 and peerdn, if requested) that were in fact used only for the second
988 address.
7e8bec7a 989
c688b954
PH
990PH/31 When doing a callout as part of verifying an address, Exim was not paying
991 attention to any local part prefix or suffix that was matched by the
992 router that accepted the address. It now behaves in the same way as it
993 does for delivery: the affixes are removed from the local part unless
994 rcpt_include_affixes is set on the transport.
995
fed77020
PH
996PH/32 Add the sender address, as F=<...>, to the log line when logging a
997 timeout during the DATA phase of an incoming message.
998
7fe1560f
PH
999PH/33 Sieve envelope tests were broken for match types other than :is. I have
1000 applied a patch sanctioned by the Sieve maintainer.
c688b954 1001
ebb6e6d5
PH
1002PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1003 the uid or gid is negative. A case of a negative gid caused this to be
1004 noticed. The fix allows for either to be negative.
1005
9c4e8f60
PH
1006PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1007 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1008 overlooked.
1009
1010PH/36 The change PH/12 above was broken. Fixed it.
1011
d7174846
PH
1012PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1013 the grounds that routing the same address twice would always produce the
1014 same answer. This might have been true once, but it is certainly no
1015 longer true now. Routing a child address may depend on the previous
1016 routing that produced that child. Some complicated redirection strategies
1017 went wrong when messages had multiple recipients, and made Exim's
1018 behaviour dependent on the order in which the addresses were given.
1019
1020 I have moved the duplicate checking until after the routing is complete.
1021 Exim scans the addresses that are assigned to local and remote
1022 transports, and removes any duplicates. This means that more work will be
1023 done, as duplicates will always all be routed, but duplicates are
1024 presumably rare, so I don't expect this is of any significance.
1025
1026 For deliveries to pipes, files, and autoreplies, the duplicate checking
1027 still happens during the routing process, since they are not going to be
1028 routed further.
1029
cfe75fc3
PH
1030PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1031 It corrects a timeout issue with spamd. This is Ian's comment: "The
1032 background is that sometimes spamd either never reads data from a
1033 connection it has accepted, or it never writes response data. The exiscan
1034 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1035 blindly assumes that writes won't block so it may never time out."
1036
be22d70e
PH
1037PH/39 Allow G after quota size as well as K and M.
1038
0612b098
PH
1039PH/40 The value set for $authenticated_id in an authenticator may not contain
1040 binary zeroes or newlines because the value is written to log lines and
1041 to spool files. There was no check on this. Now the value is run through
1042 the string_printing() function so that such characters are converted to
1043 printable escape sequences.
1044
2e0c1448
PH
1045PH/41 $message_linecount is a new variable that contains the total number of
1046 lines in the message. Compare $body_linecount, which is the count for the
1047 body only.
1048
447d236c
PH
1049PH/42 Exim no longer gives details of delivery errors for specific addresses in
1050 bounce and delay warning messages, except in certain special cases, which
1051 are as follows:
1052
1053 (a) An SMTP error message from a remote host;
1054 (b) A message specified in a :fail: redirection;
1055 (c) A message specified in a "fail" command in a system filter;
1056 (d) A message specified in a FAIL return from the queryprogram router;
1057 (e) A message specified by the cannot_route_message router option.
1058
1059 In these cases only, Exim does include the error details in bounce and
1060 warning messages. There are also a few cases where bland messages such
1061 as "unrouteable address" or "local delivery error" are given.
1062
d20976dc
PH
1063PH/43 $value is now also set for the "else" part of a ${run expansion.
1064
f656d135
PH
1065PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1066 being worked on, but at least Exim now implements the latest version to
1067 play with."
1068
2e2a30b4
PH
1069PH/45 In a pipe transport, although a timeout while waiting for the pipe
1070 process to complete was treated as a delivery failure, a timeout while
1071 writing the message to the pipe was logged, but erroneously treated as a
1072 successful delivery. Such timeouts include transport filter timeouts. For
1073 consistency with the overall process timeout, these timeouts are now
1074 treated as errors, giving rise to delivery failures by default. However,
1075 there is now a new Boolean option for the pipe transport called
1076 timeout_defer, which, if set TRUE, converts the failures into defers for
1077 both kinds of timeout. A transport filter timeout is now identified in
1078 the log output.
1079
9176e9f0
PH
1080PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1081 systems where "make" and "gmake" are different, calling "gmake" at top
1082 level broke things. I've arranged for the value of $(MAKE) to be passed
1083 from the Makefile to this script so that it can call the same version of
1084 "make".
1085
7982096b 1086
bbe902f0
PH
1087A note about Exim versions 4.44 and 4.50
1088----------------------------------------
1089
1090Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1091changes of various kinds. As a consequence, a big documentation update was
1092needed. This delayed the release for rather longer than seemed good, especially
1093in the light of a couple of (minor) security issues. Therefore, the changes
1094that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1095release. So 4.44 and 4.50 are in effect two different branches that both start
1096from 4.43.
1097
1098I have left the 4.50 change log unchanged; it contains all the changes since
10994.43. The change log for 4.44 is below; many of its items are identical to
1100those for 4.50. This seems to be the most sensible way to preserve the
1101historical information.
1102
1103
f7b63901 1104Exim version 4.50
495ae4b0
PH
1105-----------------
1106
5fe762f6
PH
1107 1. Minor wording change to the doc/README.SIEVE file.
1108
139059f6 1109 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1110 computation of the current number of files was incorrect.
495ae4b0 1111
7086e875
PH
1112 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1113 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1114 place.
1115
35af9f61
PH
1116 4. Give more explanation in the error message when the command for a transport
1117 filter fails to execute.
1118
b668c215
PH
1119 5. There are several places where Exim runs a non-Exim command in a
1120 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1121 was being done only for the command run by the queryprogram router. It is
1122 now done for all such subprocesses. The other cases are: ${run, transport
1123 filters, and the commands run by the lmtp and pipe transports.
1124
a494b1e1
PH
1125 6. Added CONFIGURE_GROUP build-time option.
1126
1127 7. Some older OS have a limit of 256 on the maximum number of file
1128 descriptors. Exim was using setrlimit() to set 1000 as a large value
1129 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1130 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1131
c5fcb476
PH
1132 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1133 was an oversight, and furthermore, ever since the addition of extra
1134 controls (e.g. 4.43/32), the checks on when to allow different forms of
1135 "control" were broken. There should now be diagnostics for all cases when a
1136 control that does not make sense is encountered.
1137
69358f02
PH
1138 9. Added the /retain_sender option to "control=submission".
1139
5be20824
PH
114010. $recipients is now available in the predata ACL (oversight).
1141
eb2c0248
PH
114211. Tidy the search cache before the fork to do a delivery from a message
1143 received from the command line. Otherwise the child will trigger a lookup
1144 failure and thereby defer the delivery if it tries to use (for example) a
1145 cached ldap connection that the parent has called unbind on.
1146
2a3eea10
PH
114712. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1148 of $address_data from the recipient verification was clobbered by the
1149 sender verification.
1150
115113. The value of address_data from a sender verification is now available in
1152 $sender_address_data in subsequent conditions in the ACL statement.
1153
23c7ff99
PH
115414. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1155
4deaf07d
PH
115615. Added a new option "connect=<time>" to callout options, to set a different
1157 connection timeout.
1158
926e1192
PH
115916. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1160 was its contents. (It was OK if the option was not defined at all.)
1161
650edc6f
PH
116217. A "Completed" log line is now written for messages that are removed from
1163 the spool by the -Mrm option.
1164
2c7db3f5
PH
116518. New variables $sender_verify_failure and $recipient_verify_failure contain
1166 information about exactly what failed.
1167
3d235903
PH
116819. Added -dd to debug only the daemon process.
1169
7c7ad977
PH
117020. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1171 handles timeouts, both on the server side and network timeouts. Renamed the
1172 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1173
981756db
PH
117421. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1175 It is now set to "smtps".
1176
d4eb88df
PH
117722. $host_address is now set to the target address during the checking of
1178 ignore_target_hosts.
1179
118023. When checking ignore_target_hosts for an ipliteral router, no host name was
1181 being passed; this would have caused $sender_host_name to have been used if
1182 matching the list had actually called for a host name (not very likely,
1183 since this list is usually IP addresses). A host name is now passed as
1184 "[x.x.x.x]".
1185
7d468ab8
PH
118624. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1187 code that specifies a non-restarting handler (typically sigaction() in
1188 modern systems) in an attempt to fix a rare and obscure crash bug.
1189
119025. Narrowed the window for a race in the daemon that could cause it to ignore
1191 SIGCHLD signals. This is not a major problem, because they are used only to
1192 wake it up if nothing else does.
1193
62c0818f
PH
119426. A malformed maildirsize file could cause Exim to calculate negative values
1195 for the mailbox size or file count. Odd effects could occur as a result.
1196 The maildirsize information is now recalculated if the size or filecount
1197 end up negative.
1198
26034054
PH
119927. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1200 support for a long time. Removed HAVE_SYS_VFS_H.
1201
af66f652
PH
120228. Installed the latest version of exipick from John Jetmore.
1203
90af77f4
PH
120429. In an address list, if the pattern was not a regular expression, an empty
1205 subject address (from a bounce message) matched only if the pattern was an
1206 empty string. Non-empty patterns were not even tested. This was the wrong
1207 because it is perfectly reasonable to use an empty address as part of a
1208 database query. An empty address is now tested by patterns that are
1209 lookups. However, all the other forms of pattern expect the subject to
1210 contain a local part and a domain, and therefore, for them, an empty
1211 address still always fails if the pattern is not itself empty.
1212
d8ef3577
PH
121330. Exim went into a mad DNS loop when attempting to do a callout where the
1214 host was specified on an smtp transport, and looking it up yielded more
1215 than one IP address.
1216
5cb8cbc6
PH
121731. Re-factored the code for checking spool and log partition space into a
1218 function that finds that data and another that does the check. The former
1219 is then used to implement four new variables: $spool_space, $log_space,
1220 $spool_inodes, and $log_inodes.
1221
14702f5b
PH
122232. The RFC2047 encoding function was originally intended for short strings
1223 such as real names; it was not keeping to the 75-character limit for
1224 encoded words that the RFC imposes. It now respects the limit, and
1225 generates multiple encoded words if necessary. To be on the safe side, I
1226 have increased the buffer size for the ${rfc2047: expansion operator from
1227 1024 to 2048 bytes.
1228
063b1e99
PH
122933. It is now permitted to omit both strings after an "if" condition; if the
1230 condition is true, the result is "true". As before, when the second string
1231 is omitted, a false condition yields an empty string. This makes it less
1232 cumbersome to write custom ACL and router conditions.
1233
652e1b65
PH
123434. Failure to deliver a bounce message always caused it to be frozen, even if
1235 there was an errors_to setting on the router. The errors_to setting is now
1236 respected.
1237
6f0c9a4f
PH
123835. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1239 canonical form (fully expanded) before being placed in
1240 $sender_host_address.
1241
33397d19
PH
124236. The table in the code that translates DNS record types into text (T_A to
1243 "A" for instance) was missing entries for NS and CNAME. It is just possible
1244 that this could have caused confusion if both these types were looked up
1245 for the same domain, because the text type is used as part of Exim's
1246 per-process caching. But the chance of anyone hitting this buglet seems
1247 very small.
1248
7bb56e1f
PH
124937. The dnsdb lookup has been extended in a number of ways.
1250
1251 (1) There is a new type, "zns", which walks up the domain tree until it
1252 finds some nameserver records. It should be used with care.
1253
ea3bc19b
PH
1254 (2) There is a new type, "mxh", which is like "mx" except that it returns
1255 just the host names, not the priorities.
1256
1257 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1258 looked up. The behaviour when one of the lookups defers can be
1259 controlled by a keyword.
7bb56e1f 1260
ea3bc19b 1261 (4) It is now possible to specify the separator character for use when
7bb56e1f 1262 multiple records are returned.
33397d19 1263
0bcb2a0e
PH
126438. The dnslists ACL condition has been extended: it is now possible to supply
1265 a list of IP addresses and/or domains to be looked up in a particular DNS
1266 domain.
1267
2ac0e484
PH
126839. Added log_selector=+queue_time_overall.
1269
4e1fde53
PH
127040. When running the queue in the test harness, wait just a tad after forking a
1271 delivery process, to get repeatability of debugging output.
1272
de365ded
PH
127341. Include certificate and key file names in error message when GnuTLS fails
1274 to set them up, because the GnuTLS error message doesn't include the name
1275 of the failing file when there is a problem reading it.
1276
f05da2e8
PH
127742. Allow both -bf and -bF in the same test run.
1278
d6453af2
PH
127943. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1280
f7b63901
PH
128144. The "Exiscan patch" is now merged into the mainline Exim source.
1282
128345. Sometimes the final signoff response after QUIT could fail to get
1284 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1285 < 0 before doing a fflush(). This bug looks as though it goes back to the
1286 introduction of TLS in release 3.20, but "sometimes" must have been rare
1287 because the tests only now provoked it.
1288
a444213a
PH
128946. Reset the locale to "C" after calling embedded Perl, in case it was changed
1290 (this can affect the format of dates).
1291
0ec020ea
PH
129247. exim_tidydb, when checking for the continued existence of a message for
1293 which it has found a message-specific retry record, was not finding
1294 messages that were in split spool directories. Consequently, it was
1295 deleting retry records that should have stayed in existence.
1296
b1206957
PH
129748. Steve fixed some bugs in eximstats.
1298
129949. The SPA authentication driver was not abandoning authentication and moving
1300 on to the next authenticator when an expansion was forced to fail,
1301 contradicting the general specification for all authenticators. Instead it
1302 was generating a temporary error. It now behaves as specified.
1303
26dd5a95
PH
130450. The default ordering of permitted cipher suites for GnuTLS was pessimal
1305 (the order specifies the preference for clients). The order is now AES256,
1306 AES128, 3DES, ARCFOUR128.
1307
343b2385
PH
130851. Small patch to Sieve code - explicitly set From: when generating an
1309 autoreply.
1310
1c5466b9
PH
131152. Exim crashed if a remote delivery caused a very long error message to be
1312 recorded - for instance if somebody sent an entire SpamAssassin report back
1313 as a large number of 550 error lines. This bug was coincidentally fixed by
1314 increasing the size of one of Exim's internal buffers (big_buffer) that
1315 happened as part of the Exiscan merge. However, to be on the safe side, I
1316 have made the code more robust (and fixed the comments that describe what
1317 is going on).
1318
55ee9ee3
PH
131953. Now that there can be additional text after "Completed" in log lines (if
1320 the queue_time_overall log selector is set), a one-byte patch to exigrep
1321 was needed to allow it to recognize "Completed" as not the last thing in
1322 the line.
1323
d38f8232
PH
132454. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1325 patch that reportedly fixes this has been added. I am not expert enough to
1326 create a test for it. This is what the patch creator wrote:
1327
1328 "I found a little strange behaviour of ldap code when working with
1329 Windows 2003 AD Domain, where users was placed in more than one
1330 Organization Units. When I tried to give exim partial DN, the exit code
1331 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1332 But simultaneously result of request was absolutely normal ldap result,
1333 so I produce this patch..."
1334
3295e65b
PH
1335 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1336 REFERENCE, so I have modified the code to exclude the patch when that macro
1337 is not defined.
1338
7102e136
PH
133955. Some experimental protocols are using DNS PTR records for new purposes. The
1340 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1341 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1342 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1343 CAN-2005-0021
7102e136 1344
3ca0ba97
PH
134556. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1346
c2bcbe20
PH
134757. Double the size of the debug message buffer (to 2048) so that more of very
1348 long debug lines gets shown.
1349
18ce445d
PH
135058. The exicyclog utility now does better if the number of log files to keep
1351 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1352
1f5b4c3d
PH
135359. Two changes related to the smtp_active_hostname option:
1354
1355 (1) $smtp_active_hostname is now available as a variable.
1356 (2) The default for smtp_banner uses $smtp_active_hostname instead
1357 of $primary_hostname.
1358
b975ba52
PH
135960. The host_aton() function is supposed to be passed a string that is known
1360 to be a valid IP address. However, in the case of IPv6 addresses, it was
1361 not checking this. This is a hostage to fortune. Exim now panics and dies
1362 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1363 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1364 components; fortuitously, this particular loophole had already been fixed
1365 by change 4.50/55 above.
1366
1367 If there are any other similar loopholes, the new check in host_aton()
1368 itself should stop them being exploited. The report I received stated that
1369 data on the command line could provoke the exploit when Exim was running as
1370 exim, but did not say which command line option was involved. All I could
1371 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1372 running as the user.
ea3a6f44 1373 CAN-2005-0021
85b87bc2
PH
1374
137561. There was a buffer overflow vulnerability in the SPA authentication code
1376 (which came originally from the Samba project). I have added a test to the
1377 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1378 CAN-2005-0022
b975ba52 1379
17ffcae7
PH
138062. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1381 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1382
d95f9fdb
PH
138363. The daemon start-up calls getloadavg() while still root for those OS that
1384 need the first call to be done as root, but it missed one case: when
1385 deliver_queue_load_max is set with deliver_drop_privilege. This is
1386 necessary for the benefit of the queue runner, because there is no re-exec
1387 when deliver_drop_privilege is set.
1388
86b8287f
PH
138964. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1390 This has been fixed.
1391
60dc5e56
PH
139265. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1393 was in use, was not putting the data itself into the right store pool;
1394 consequently, it could be overwritten for a subsequent message in the same
1395 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1396 the caching.)
1397
533244af
PH
139866. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1399
a5a28604
PH
140067. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1401 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1402 the function were treating the return as a boolean value, which happened to
1403 work because 0=false and not-0=true, but is not correct code.
1404
7e634d24
PH
140568. The host_aton() function was not handling scoped IPv6 addresses (those
1406 with, for example, "%eth0" on the end) correctly.
1407
3e11c26b
PH
140869. Fixed some compiler warnings in acl.c for the bitmaps specified with
1409 negated items (that is, ~something) in unsigned ints. Some compilers
1410 apparently mutter when there is no cast.
1411
6729cf78
PH
141270. If an address verification called from an ACL failed, and did not produce a
1413 user-specific message (i.e. there was only a "system" message), nothing was
1414 put in $acl_verify_message. In this situation, it now puts the system
1415 message there.
1416
00f00ca5
PH
141771. Change 4.23/11 added synchronization checking at the start of an SMTP
1418 session; change 4.31/43 added the unwanted input to the log line - except
1419 that it did not do this in the start of session case. It now does.
1420
c9bdd01c
PH
142172. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1422 This is wrong and can cause the other end to generate a synchronization
1423 error if it is another Exim or anything else that does the synchronization
1424 check. A QUIT command is no longer sent after a timeout.
1425
d43194df
PH
142673. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1427 during host lookups.
1428
fe5b5d0b
PH
142974. The defer_ok option of callout verification was not working if it was used
1430 when verifying addresses in header lines, that is, for this case:
1431
1432 verify = header_sender/callout=defer_ok
1433
76a2d7ba
PH
143475. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1435 those file descriptors could be used for SMTP connections. If anything
1436 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1437 could be sent to the SMTP client, causing chaos. The daemon now opens
1438 stdin, stdout, and stderr to /dev/null when it puts itself into the
1439 background.
1440
144176. Arrange for output from Perl's "warn" command to be written to Exim's main
1442 log by default. The user can override this with suitable Perl magic.
1443
04f7d5b9
PH
144477. The use of log_message on a "discard" ACL verb, which is supposed to add to
1445 the log message when discard triggers, was not working for the DATA ACL or
1446 for the non-SMTP ACL.
1447
bc60667e
PH
144878. Error message wording change in sieve.c.
1449
bb6e88ff
PH
145079. If smtp_accept_max_per_host was set, the number of connections could be
1451 restricted to fewer than expected, because the daemon was trying to set up
1452 a new connection before checking whether the processes handling previous
1453 connections had finished. The check for completed processes is now done
1454 earlier. On busy systems, this bug wouldn't be noticed because something
1455 else would have woken the daemon, and it would have reaped the completed
1456 process earlier.
1457
1e70f85b
PH
145880. If a message was submitted locally by a user whose login name contained one
1459 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1460 It caused a spool format error. I have fixed the spool reading code. A
1461 related problem was that the "from" clause in the Received: line became
1462 illegal because of the space(s). It is now covered by ${quote_local_part.
1463
146481. Included the latest eximstats from Steve (adds average sizes to HTML Top
1465 tables).
1466
4e01f9d6
PH
146782. Updated OS/Makefile-AIX as per message from Mike Meredith.
1468
1ee1cef2
PH
146983. Patch from Sieve maintainer to fix unterminated string problem in
1470 "vacation" handling.
1471
6e2b4ccc
PH
147284. Some minor changes to the Linux configuration files to help with other
1473 OS variants using glibc.
1474
8e669ac1
PH
147585. One more patch for Sieve to update vacation handling to latest spec.
1476
495ae4b0 1477
bbe902f0
PH
1478----------------------------------------------------
1479See the note above about the 4.44 and 4.50 releases.
1480----------------------------------------------------
1481
1482
1483Exim version 4.44
1484-----------------
1485
1486 1. Change 4.43/35 introduced a bug that caused file counts to be
1487 incorrectly computed when quota_filecount was set in an appendfile
1488 transport
1489
1490 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1491 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1492 place.
1493
1494 3. Give more explanation in the error message when the command for a transport
1495 filter fails to execute.
1496
1497 4. There are several places where Exim runs a non-Exim command in a
1498 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1499 was being done only for the command run by the queryprogram router. It is
1500 now done for all such subprocesses. The other cases are: ${run, transport
1501 filters, and the commands run by the lmtp and pipe transports.
1502
1503 5. Some older OS have a limit of 256 on the maximum number of file
1504 descriptors. Exim was using setrlimit() to set 1000 as a large value
1505 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1506 systems. I've change it so that if it can't get 1000, it tries for 256.
1507
1508 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1509 was an oversight, and furthermore, ever since the addition of extra
1510 controls (e.g. 4.43/32), the checks on when to allow different forms of
1511 "control" were broken. There should now be diagnostics for all cases when a
1512 control that does not make sense is encountered.
1513
1514 7. $recipients is now available in the predata ACL (oversight).
1515
1516 8. Tidy the search cache before the fork to do a delivery from a message
1517 received from the command line. Otherwise the child will trigger a lookup
1518 failure and thereby defer the delivery if it tries to use (for example) a
1519 cached ldap connection that the parent has called unbind on.
1520
1521 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1522 of $address_data from the recipient verification was clobbered by the
1523 sender verification.
1524
152510. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1526 was its contents. (It was OK if the option was not defined at all.)
1527
152811. A "Completed" log line is now written for messages that are removed from
1529 the spool by the -Mrm option.
1530
153112. $host_address is now set to the target address during the checking of
1532 ignore_target_hosts.
1533
153413. When checking ignore_target_hosts for an ipliteral router, no host name was
1535 being passed; this would have caused $sender_host_name to have been used if
1536 matching the list had actually called for a host name (not very likely,
1537 since this list is usually IP addresses). A host name is now passed as
1538 "[x.x.x.x]".
1539
154014. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1541 code that specifies a non-restarting handler (typically sigaction() in
1542 modern systems) in an attempt to fix a rare and obscure crash bug.
1543
154415. Narrowed the window for a race in the daemon that could cause it to ignore
1545 SIGCHLD signals. This is not a major problem, because they are used only to
1546 wake it up if nothing else does.
1547
154816. A malformed maildirsize file could cause Exim to calculate negative values
1549 for the mailbox size or file count. Odd effects could occur as a result.
1550 The maildirsize information is now recalculated if the size or filecount
1551 end up negative.
1552
155317. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1554 support for a long time. Removed HAVE_SYS_VFS_H.
1555
ea3a6f44 155618. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1557
155819. Allow an empty sender to be matched against a lookup in an address list.
1559 Previously the only cases considered were a regular expression, or an
1560 empty pattern.
1561
156220. Exim went into a mad DNS lookup loop when doing a callout where the
1563 host was specified on the transport, if the DNS lookup yielded more than
1564 one IP address.
1565
ea3a6f44
NM
156621. The RFC2047 encoding function was originally intended for short strings
1567 such as real names; it was not keeping to the 75-character limit for
1568 encoded words that the RFC imposes. It now respects the limit, and
1569 generates multiple encoded words if necessary. To be on the safe side, I
1570 have increased the buffer size for the ${rfc2047: expansion operator from
1571 1024 to 2048 bytes.
bbe902f0 1572
ea3a6f44
NM
157322. Failure to deliver a bounce message always caused it to be frozen, even if
1574 there was an errors_to setting on the router. The errors_to setting is now
1575 respected.
bbe902f0
PH
1576
157723. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1578 canonical form (fully expanded) before being placed in
1579 $sender_host_address.
1580
158124. Updated eximstats to version 1.33
1582
ea3a6f44
NM
158325. Include certificate and key file names in error message when GnuTLS fails
1584 to set them up, because the GnuTLS error message doesn't include the name
1585 of the failing file when there is a problem reading it.
bbe902f0
PH
1586
158726. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1588 As per change 25.
bbe902f0 1589
ea3a6f44
NM
159027. Reset the locale to "C" after calling embedded Perl, in case it was changed
1591 (this can affect the format of dates).
bbe902f0 1592
ea3a6f44
NM
159328. exim_tidydb, when checking for the continued existence of a message for
1594 which it has found a message-specific retry record, was not finding
1595 messages that were in split spool directories. Consequently, it was
1596 deleting retry records that should have stayed in existence.
bbe902f0
PH
1597
159829. eximstats updated to version 1.35
1599 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1600 1.35 - bugfix such that pie charts by volume are generated correctly
1601
ea3a6f44
NM
160230. The SPA authentication driver was not abandoning authentication and moving
1603 on to the next authenticator when an expansion was forced to fail,
1604 contradicting the general specification for all authenticators. Instead it
1605 was generating a temporary error. It now behaves as specified.
bbe902f0 1606
ea3a6f44
NM
160731. The default ordering of permitted cipher suites for GnuTLS was pessimal
1608 (the order specifies the preference for clients). The order is now AES256,
1609 AES128, 3DES, ARCFOUR128.
bbe902f0 1610
ea3a6f44
NM
161131. Small patch to Sieve code - explicitly set From: when generating an
1612 autoreply.
bbe902f0 1613
ea3a6f44
NM
161432. Exim crashed if a remote delivery caused a very long error message to be
1615 recorded - for instance if somebody sent an entire SpamAssassin report back
1616 as a large number of 550 error lines. This bug was coincidentally fixed by
1617 increasing the size of one of Exim's internal buffers (big_buffer) that
1618 happened as part of the Exiscan merge. However, to be on the safe side, I
1619 have made the code more robust (and fixed the comments that describe what
1620 is going on).
bbe902f0 1621
ea3a6f44
NM
162233. Some experimental protocols are using DNS PTR records for new purposes. The
1623 keys for these records are domain names, not reversed IP addresses. The
1624 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1625 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1626 CAN-2005-0021
1627
ea3a6f44
NM
162834. The host_aton() function is supposed to be passed a string that is known
1629 to be a valid IP address. However, in the case of IPv6 addresses, it was
1630 not checking this. This is a hostage to fortune. Exim now panics and dies
1631 if the condition is not met. A case was found where this could be provoked
1632 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1633 components; fortuitously, this particular loophole had already been fixed
1634 by change 4.50/55 or 4.44/33 above.
1635
1636 If there are any other similar loopholes, the new check in host_aton()
1637 itself should stop them being exploited. The report I received stated that
1638 data on the command line could provoke the exploit when Exim was running as
1639 exim, but did not say which command line option was involved. All I could
1640 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1641 running as the user.
bbe902f0
PH
1642 CAN-2005-0021
1643
ea3a6f44
NM
164435. There was a buffer overflow vulnerability in the SPA authentication code
1645 (which came originally from the Samba project). I have added a test to the
1646 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1647 CAN-2005-0022
1648
ea3a6f44
NM
164936. The daemon start-up calls getloadavg() while still root for those OS that
1650 need the first call to be done as root, but it missed one case: when
1651 deliver_queue_load_max is set with deliver_drop_privilege. This is
1652 necessary for the benefit of the queue runner, because there is no re-exec
1653 when deliver_drop_privilege is set.
bbe902f0 1654
ea3a6f44
NM
165537. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1656 was in use, was not putting the data itself into the right store pool;
1657 consequently, it could be overwritten for a subsequent message in the same
1658 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1659 the caching.)
bbe902f0 1660
ea3a6f44
NM
166138. Sometimes the final signoff response after QUIT could fail to get
1662 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1663 < 0 before doing a fflush(). This bug looks as though it goes back to the
1664 introduction of TLS in release 3.20, but "sometimes" must have been rare
1665 because the tests only now provoked it.
bbe902f0
PH
1666
1667
495ae4b0
PH
1668Exim version 4.43
1669-----------------
1670
1671 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1672 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1673 Now it returns an integer. A number of calls were still expecting a T/F
1674 return. Fortuitously, in all cases, the tests worked in OK situations,
1675 which is the norm. However, things would have gone wrong on any write
1676 failures on the smtp file descriptor. This function is used when sending
1677 messages over SMTP and also when doing verify callouts.
1678
1679 2. When Exim is called to do synchronous delivery of a locally submitted
1680 message (the -odf or -odi options), it no longer closes stderr before doing
1681 the delivery.
1682
1683 3. Implemented the mua_wrapper option.
1684
1685 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1686
1687 5. Implemented the functions header_remove(), header_testname(),
1688 header_add_at_position(), and receive_remove_recipient(), and exported them
1689 to local_scan().
1690
1691 6. If an ACL "warn" statement specified the addition of headers, Exim already
1692 inserted X-ACL-Warn: at the start if there was no header name. However, it
1693 was not making this test for the second and subsequent header lines if
1694 there were newlines in the string. This meant that an invalid header could
1695 be inserted if Exim was badly configured.
1696
1697 7. Allow an ACL "warn" statement to add header lines at the start or after all
1698 the Received: headers, as well as at the end.
1699
1700 8. Added the rcpt_4xx retry error code.
1701
1702 9. Added postmaster_mailfrom=xxx to callout verification option.
1703
170410. Added mailfrom=xxxx to the callout verification option, for verify=
1705 header_sender only.
1706
170711. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1708 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1709
171012. Inserted some casts to stop certain compilers warning when using pointer
1711 differences as field lengths or precisions in printf-type calls (mostly
1712 affecting debugging statements).
1713
171413. Added optional readline() support for -be (dynamically loaded).
1715
171614. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1717 same clock tick as a message's arrival, so that its received time was the
1718 same as the "first fail" time on the retry record, and that message
1719 remained on the queue past the ultimate address timeout, every queue runner
1720 would try a delivery (because it was past the ultimate address timeout) but
1721 after another failure, the ultimate address timeout, which should have then
1722 bounced the address, did not kick in. This was a "< instead of <=" error;
1723 in most cases the first failure would have been in the next clock tick
1724 after the received time, and all would be well.
1725
172615. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1727 being recognized when the domain list was tested by the match_domain
1728 condition in an expansion string.
1729
173016. Added the ${str2b64: operator.
1731
173217. Exim was always calling setrlimit() to set a large limit for the number of
1733 processes, without checking whether the existing limit was already
1734 adequate. (It did check for the limit on file descriptors.) Furthermore,
1735 errors from getrlimit() and setrlimit() were being ignored. Now they are
1736 logged to the main and panic logs, but Exim does carry on, to try to do its
1737 job under whatever limits there are.
1738
173918. Imported PCRE 5.0.
1740
174119. Trivial typo in log message " temporarily refused connection" (the leading
1742 space).
1743
174420. If the log selector return_path_on_delivery was set and an address was
1745 redirected to /dev/null, the delivery process crashed because it assumed
1746 that a return path would always be set for a "successful" delivery. In this
1747 case, the whole delivery is bypassed as an optimization, and therefore no
1748 return path is set.
1749
175021. Internal re-arrangement: the function for sending a challenge and reading
1751 a response while authentication was assuming a zero-terminated challenge
1752 string. It's now changed to take a pointer and a length, to allow for
1753 binary data in such strings.
1754
175522. Added the cyrus_sasl authenticator (code supplied by MBM).
1756
175723. Exim was not respecting finduser_retries when seeking the login of the
1758 uid under which it was called; it was always trying 10 times. (The default
1759 setting of finduser_retries is zero.) Also, it was sleeping after the final
1760 failure, which is pointless.
1761
176224. Implemented tls_on_connect_ports.
1763
176425. Implemented acl_smtp_predata.
1765
176626. If the domain in control=submission is set empty, Exim assumes that the
1767 authenticated id is a complete email address when it generates From: or
1768 Sender: header lines.
1769
177027. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1771 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1772 chown and chgrp in /bin and hostname in /usr/bin.
1773
177428. Exim was keeping the "process log" file open after each use, just as it
1775 does for the main log. This opens the possibility of it remaining open for
1776 long periods when the USR1 signal hits a daemon. Occasional processlog
1777 errors were reported, that could have been caused by this. Anyway, it seems
1778 much more sensible not to leave this file open at all, so that is what now
1779 happens.
1780
178129. The long-running daemon process does not normally write to the log once it
1782 has entered its main loop, and it closes the log before doing so. This is
1783 so that log files can straightforwardly be renamed and moved. However,
1784 there are a couple of unusual error situations where the daemon does write
1785 log entries, and I had neglected to close the log afterwards.
1786
178730. The text of an SMTP error response that was received during a remote
1788 delivery was being truncated at 512 bytes. This is too short for some of
1789 the long messages that one sometimes sees. I've increased the limit to
1790 1024.
1791
179231. It is now possible to make retry rules that apply only when a message has a
1793 specific sender, in particular, an empty sender.
1794
179532. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1796 it possible to be selective about when SMTP synchronization is enforced.
1797
179833. Added "control = caseful_local_part" and "control = "caselower_local_part".
1799
180032. Implemented hosts_connection_nolog.
1801
180233. Added an ACL for QUIT.
1803
180434. Setting "delay_warning=" to disable warnings was not working; it gave a
1805 syntax error.
1806
180735. Added mailbox_size and mailbox_filecount to appendfile.
1808
180936. Added control = no_multiline_responses to ACLs.
1810
181137. There was a bug in the logic of the code that waits for the clock to tick
1812 in the case where the clock went backwards by a substantial amount such
1813 that the microsecond fraction of "now" was more than the microsecond
1814 fraction of "then" (but the whole seconds number was less).
1815
181638. Added support for the libradius Radius client library this is found on
1817 FreeBSD (previously only the radiusclient library was supported).
1818
1819
1820Exim version 4.42
1821-----------------
1822
1823 1. When certain lookups returned multiple values in the form name=value, the
1824 quoting of the values was not always being done properly. Specifically:
1825 (a) If the value started with a double quote, but contained no whitespace,
1826 it was not quoted.
1827 (b) If the value contained whitespace other than a space character (i.e.
1828 tabs or newlines or carriage returns) it was not quoted.
1829 This fix has been applied to the mysql and pgsql lookups by writing a
1830 separate quoting function and calling it from the lookup code. The fix
1831 should probably also be applied to nisplus, ibase and oracle lookups, but
1832 since I cannot test any of those, I have not disturbed their existing code.
1833
1834 2. A hit in the callout cache for a specific address caused a log line with no
1835 reason for rejecting RCPT. Now it says "Previous (cached) callout
1836 verification failure".
1837
1838 3. There was an off-by-one bug in the queryprogram router. An over-long
1839 return line was truncated at 256 instead of 255 characters, thereby
1840 overflowing its buffer with the terminating zero. As well as fixing this, I
1841 have increased the buffer size to 1024 (and made a note to document this).
1842
1843 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1844 when Exim is waiting for an SMTP response from a remote server, Exim
1845 restarts its select() call on the socket, thereby resetting its timeout.
1846 This is not a problem when such interrupts are rare. Somebody set up a cron
1847 job to run exiwhat every 2 minutes, which is less than the normal select()
1848 timeout (5 or 10 minutes). This meant that the select() timeout never
1849 kicked in because it was always reset. I have fixed this by comparing the
1850 time when an interrupt arrives with the time at the start of the first call
1851 to select(). If more time than the timeout has elapsed, the interrupt is
1852 treated as a timeout.
1853
1854 5. Some internal re-factoring in preparation for the addition of Sieve
1855 extensions (by MH). In particular, the "personal" test is moved to a
1856 separate function, and given an option for scanning Cc: and Bcc: (which is
1857 not set for Exim filters).
1858
1859 6. When Exim created an email address using the login of the caller as the
1860 local part (e.g. when creating a From: or Sender: header line), it was not
1861 quoting the local part when it contained special characters such as @.
1862
1863 7. Installed new OpenBSD configuration files.
1864
1865 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1866 try to make them clearer.
1867
1868 9. Callout options, other than the timeout value, were being ignored when
1869 verifying sender addresses in header lines. For example, when using
1870
1871 verify = header_sender/callout=no_cache
1872
1873 the cache was (incorrectly) being used.
1874
187510. Added a missing instance of ${EXE} to the exim_install script; this affects
1876 only the Cygwin environment.
1877
187811. When return_path_on_delivery was set as a log selector, if different remote
1879 addresses in the same message used different return paths and parallel
1880 remote delivery occurred, the wrong values would sometimes be logged.
1881 (Whenever a remote delivery process finished, the return path value from
1882 the most recently started remote delivery process was logged.)
1883
188412. RFC 3848 specifies standard names for the "with" phrase in Received: header
1885 lines when AUTH and/or TLS are in use. This is the "received protocol"
1886 field. Exim used to use "asmtp" for authenticated SMTP, without any
1887 indication (in the protocol name) for TLS use. Now it follows the RFC and
1888 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1889 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1890 names appear in log lines as well as in Received: header lines.
1891
189213. Installed MH's patches for Sieve to add the "copy" and "vacation"
1893 extensions, and comparison tests, and to fix some bugs.
1894
189514. Changes to the "personal" filter test:
1896
1897 (1) The test was buggy in that it was just doing the equivalent of
1898 "contains" tests on header lines. For example, if a user's address was
1899 anne@some.where, the "personal" test would incorrectly be true for
1900
1901 To: susanne@some.where
1902
1903 This test is now done by extracting each address from the header in turn,
1904 and checking the entire address. Other tests that are part of "personal"
1905 are now done using regular expressions (for example, to check local parts
1906 of addresses in From: header lines).
1907
1908 (2) The list of non-personal local parts in From: addresses has been
1909 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1910 taken from the Sieve specification recommendations.
1911
1912 (3) If the message contains any header line starting with "List-" it is
1913 treated as non-personal.
1914
1915 (4) The test for "circular" in the Subject: header line has been removed
1916 because it now seems ill-conceived.
1917
191815. Minor typos in src/EDITME comments corrected.
1919
192016. Installed latest exipick from John Jetmore.
1921
192217. If headers_add on a router specified a text string that was too long for
1923 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1924 of string_sprintf() is now avoided.
1925
192618. $message_body_size was not set (it was always zero) when running the DATA
1927 ACL and the local_scan() function.
1928
192919. For the "mail" command in an Exim filter, no default was being set for
1930 the once_repeat time, causing a random time value to be used if "once" was
1931 specified. (If the value happened to be <= 0, no repeat happened.) The
1932 default is now 0s, meaning "never repeat". The "vacation" command was OK
1933 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1934 (I found it when inspecting the code).
1935
193620. There is now an overall timeout for performing a callout verification. It
1937 defaults to 4 times the callout timeout, which applies to individual SMTP
1938 commands during the callout. The overall timeout applies when there is more
1939 than one host that can be tried. The timeout is checked before trying the
1940 next host. This prevents very long delays if there are a large number of
1941 hosts and all are timing out (e.g. when the network connections are timing
1942 out). The value of the overall timeout can be changed by specifying an
1943 additional sub-option for "callout", called "maxwait". For example:
1944
1945 verify = sender/callout=5s,maxwait=20s
1946
194721. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1948 to the end before writing, but this should make it even safer).
1949
195022. Exim was forgetting that it had advertised PIPELINING for the second and
1951 subsequent messages on an SMTP connection. It was also not resetting its
1952 memory on STARTTLS and an internal HELO.
1953
195423. When Exim logs an SMTP synchronization error within a session, it now
1955 records whether PIPELINING has been advertised or not.
1956
195724. Added 3 instances of "(long int)" casts to time_t variables that were being
1958 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1959 rather than long int.
1960
196125. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1962
196326. Added the never_mail option to autoreply.
1964
1965
1966Exim version 4.41
1967-----------------
1968
1969 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1970 crash if the getsockname() call failed; this can happen if a connection is
1971 closed very soon after it is established. The problem was simply in the
1972 order in which certain operations were done, causing Exim to try to write
1973 to the SMTP stream before it had set up the file descriptor. The bug has
1974 been fixed by making things happen in the correct order.
1975
1976
1977Exim version 4.40
1978-----------------
1979
1980 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1981 before the connection was closed, thus losing the rejection response.
1982
1983 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1984 some early Solaris releases, but causes trouble in current releases where
1985 socklen_t is defined.
1986
1987 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1988 always exist.
1989
1990 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1991 configured.
1992
1993 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1994 that releasing the top of it at the end releases what was used for sub-
1995 expansions (unless the block got too big). However, discard this block if
1996 the first thing is a variable or header, so that we can use its block when
1997 it is dynamic (useful for very large $message_headers, for example).
1998
1999 6. Lookups now cache *every* query, not just the most recent. A new, separate
2000 store pool is used for this. It can be recovered when all lookup caches are
2001 flushed. Lookups now release memory at the end of their result strings.
2002 This has involved some general refactoring of the lookup sources.
2003
2004 7. Some code has been added to the store_xxx() functions to reduce the amount
2005 of flapping under certain conditions.
2006
2007 8. log_incoming_interface used to affect only the <= reception log lines. Now
2008 it causes the local interface and port to be added to several more SMTP log
2009 lines, for example "SMTP connection from", and rejection lines.
2010
2011 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2012
201310. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2014
201511. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2016 could be overwritten at the end of the current message (or the start of a
2017 new message if it was set in a HELO ACL). The value is now preserved for
2018 the duration of the SMTP connection.
2019
202012. If a transport had a headers_rewrite setting, and a matching header line
2021 contained an unqualified address, that address was qualified, even if it
2022 did not match any rewriting rules. The underlying bug was that the values
2023 of the flags that permit the existence of unqualified sender and recipient
2024 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2025 non-local messages, and by -bnq for local messages) were not being
2026 preserved with the message after it was received.
2027
202813. When Exim was logging an SMTP synchronization error, it could sometimes log
2029 "next input=" as part of the text comprising the host identity instead of
2030 the correct text. The code was using the same buffer for two different
2031 strings. However, depending on which order the printing function evaluated
2032 its arguments, the bug did not always show up. Under Linux, for example, my
2033 test suite worked just fine.
2034
203514. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2036 doesn't work with some older versions of Perl. It has been changed to "my",
2037 which in any case is probably the better facility to use.
2038
203915. A really picky compiler found some instances of statements for creating
2040 error messages that either had too many or two few arguments for the format
2041 string.
2042
204316. The size of the buffer for calls to the DNS resolver has been increased
2044 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2045 for addresses that have a lot of PTR records. This alleviates a problem; it
2046 does not fully solve it.
2047
204817. A dnsdb lookup for PTR records that receives more data than will fit in the
2049 buffer now truncates the list and logs the incident, which is the same
2050 action as happens when Exim is looking up a host name and its aliases.
2051 Previously in this situation something unpredictable would happen;
2052 sometimes it was "internal error: store_reset failed".
2053
205418. If a server dropped the connection unexpectedly when an Exim client was
2055 using GnuTLS and trying to read a response, the client delivery process
2056 crashed while trying to generate an error log message.
2057
205819. If a "warn" verb in an ACL added multiple headers to a message in a single
2059 string, for example:
2060
2061 warn message = H1: something\nH2: something
2062
2063 the text was added as a single header line from Exim's point of view
2064 though it ended up OK in the delivered message. However, searching for the
2065 second and subsequent header lines using $h_h2: did not work. This has been
2066 fixed. Similarly, if a system filter added multiple headers in this way,
2067 the routers could not see them.
2068
206920. Expanded the error message when iplsearch is called with an invalid key to
2070 suggest using net-iplsearch in a host list.
2071
207221. When running tests using -bh, any delays imposed by "delay" modifiers in
2073 ACLs are no longer actually imposed (and a message to that effect is
2074 output).
2075
207622. If a "gecos" field in a passwd entry contained escaped characters, in
2077 particular, if it contained a \" sequence, Exim got it wrong when building
2078 a From: or a Sender: header from that name. A second bug also caused
2079 incorrect handling when an unquoted " was present following a character
2080 that needed quoting.
2081
208223. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2083 was not being matched caselessly.
2084
208524. Arranged for all hyphens in the exim.8 source to be escaped with
2086 backslashes.
2087
208825. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2089 properly. Recipient callout cache records were still being keyed to include
2090 the sender, even when use_sender was set false. This led to far more
2091 callouts that were necessary. The sender is no longer included in the key
2092 when use_sender is false.
2093
209426. Added "control = submission" modifier to ACLs.
2095
209627. Added the ${base62d: operator to decode base 62 numbers.
2097
209828. dnsdb lookups can now access SRV records.
2099
210029. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2101 the configuration file.
2102
210330. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2104 (-v) mode. This makes the output for a verbose queue run more intelligible.
2105
210631. Added a use_postmaster feature to recipient callouts.
2107
210832. Added the $body_zerocount variable, containing the number of binary zero
2109 bytes in the message body.
2110
211133. The time of last modification of the "new" subdirectory is now used as the
2112 "mailbox time last read" when there is a quota error for a maildir
2113 delivery.
2114
211534. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2116
211735. Added +ignore_unknown as a special item in host lists.
2118
211936. Code for decoding IPv6 addresses in host lists is now included, even if
2120 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2121 address was recognized as an IP address, but was then not correctly decoded
2122 into binary, causing unexpected and incorrect effects when compared with
2123 another IP address.
2124
2125
2126Exim version 4.34
2127-----------------
2128
2129 1. Very minor rewording of debugging text in manualroute to say "list of
2130 hosts" instead of "hostlist".
2131
2132 2. If verify=header_syntax was set, and a header line with an unqualified
2133 address (no domain) and a large number of spaces between the end of the
2134 name and the colon was received, the reception process suffered a buffer
2135 overflow, and (when I tested it) crashed. This was caused by some obsolete
2136 code that should have been removed. The fix is to remove it!
2137
2138 3. When running in the test harness, delay a bit after writing a bounce
2139 message to get a bit more predictability in the log output.
2140
2141 4. Added a call to search_tidyup() just before forking a reception process. In
2142 theory, someone could use a lookup in the expansion of smtp_accept_max_
2143 per_host which, without the tidyup, could leave open a database connection.
2144
2145 5. Added the variables $recipient_data and $sender_data which get set from a
2146 lookup success in an ACL "recipients" or "senders" condition, or a router
2147 "senders" option, similar to $domain_data and $local_part_data.
2148
2149 6. Moved the writing of debug_print from before to after the "senders" test
2150 for routers.
2151
2152 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2153 problems for message scanning, either using a data ACL, or using
2154 local_scan() because the Received: header was not generated till after they
2155 were called (in order to set the time as the time of reception completion).
2156 I have revised the way this works. The header is now generated after the
2157 body is received, but before the ACL or local_scan() are called. After they
2158 are run, the timestamp in the header is updated.
2159
2160
2161Exim version 4.33
2162-----------------
2163
2164 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2165 before starting a queue runner without re-exec. This happened only when
2166 deliver_drop_privilege was set or when the Exim user was set to root. The
2167 effect of the bug was that timeouts during subsequent deliveries caused
2168 crashes instead of being properly handled. The handler is now left at its
2169 default (and expected) setting.
2170
2171 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2172 message, again when deliver_drop_privilege is set or Exim is run as root.
2173 The bug described in (1) was not present in this case, but the tidying up
2174 of the other signals was missing. I have made the two cases consistent.
2175
2176 3. The ignore_target_hosts setting on a manualroute router was being ignored
2177 for hosts that were looked up using the /MX notation.
2178
2179 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2180 in domain lists.
2181
2182 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2183 operated on the sender address. After changing the $sender_address to <>
2184 for the sender address verify, Exim was re-instated it as the original
2185 (before rewriting) address, but remembering that it had rewritten it, so it
2186 wasn't rewriting it again. This bug also had the effect of breaking the
2187 sender address verification caching when the sender address was rewritten.
2188
2189 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2190 This has been changed so that if the ip literal address matches
2191 ignore_target_hosts, the router declines.
2192
2193 7. Added expansion conditions match_domain, match_address, and match_local_
2194 part (NOT match_host).
2195
2196 8. The placeholder for the Received: header didn't have a length field set.
2197
2198 9. Added code to Exim itself and to exim_lock to test for a specific race
2199 condition that could lead to file corruption when using MBX delivery. The
2200 issue is with the lockfile that is created in /tmp. If this file is removed
2201 after a process has opened it but before that process has acquired a lock,
2202 there is the potential for a second process to recreate the file and also
2203 acquire a lock. This could lead to two Exim processes writing to the file
2204 at the same time. The added code performs the same test as UW imapd; it
2205 checks after acquiring the lock that its file descriptor still refers to
2206 the same named file.
2207
220810. The buffer for building added header lines was of fixed size, 8192 bytes.
2209 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2210 when Exim is built.
2211
221211. Added the smtp_active_hostname option. If used, this will typically be made
2213 to depend on the incoming interface address. Because $interface_address is
2214 not set up until the daemon has forked a reception process, error responses
2215 that can happen earlier (such as "too many connections") no longer contain
2216 a host name.
2217
221812. If an expansion in a condition on a "warn" statement fails because a lookup
2219 defers, the "warn" statement is abandoned, and the next ACL statement is
2220 processed. Previously this caused the whole ACL to be aborted.
2221
222213. Added the iplsearch lookup type.
2223
222414. Added ident_timeout as a log selector.
2225
222615. Added tls_certificate_verified as a log selector.
2227
222816. Added a global option tls_require_ciphers (compare the smtp transport
2229 option of the same name). This controls incoming TLS connections.
2230
223117. I finally figured out how to make tls_require_ciphers do a similar thing
2232 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2233 before starting the TLS session.
2234
223518. Tabs are now shown as \t in -bP output.
2236
223719. If the log selector return_path_on_delivery was set, Exim crashed when
2238 bouncing a message because it had too many Received: header lines.
2239
224020. If two routers both had headers_remove settings, and the first one included
2241 a superfluous trailing colon, the final name in the first list and the
2242 first name in the second list were incorrectly joined into one item (with a
2243 colon in the middle).
2244
2245
2246Exim version 4.32
2247-----------------
2248
2249 1. Added -C and -D options to the exinext utility, mainly to make it easier
2250 to include in the automated testing, but these could be helpful when
2251 multiple configurations are in use.
2252
2253 2. The exinext utility was not formatting the output nicely when there was
2254 an alternate port involved in the retry record key, nor when there was a
2255 message id as well (for retries that were specific to a specific message
2256 and a specific host). It was also confused by IPv6 addresses, because of
2257 the additional colons they contain. I have fixed the IPv4 problem, and
2258 patched it up to do a reasonable job for IPv6.
2259
2260 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2261 delivery, the log line now contains "pipelined" if PIPELINING was used.
2262
2263 4. An SMTP transport process used to panic and die if the bind() call to set
2264 an explicit outgoing interface failed. This has been changed; it is now
2265 treated in the same way as a connect() failure.
2266
2267 5. A reference to $sender_host_name in the part of a conditional expansion
2268 that was being skipped was still causing a DNS lookup. This no longer
2269 occurs.
2270
2271 6. The def: expansion condition was not recognizing references to header lines
2272 that used bh_ and bheader_.
2273
2274 7. Added the _cache feature to named lists.
2275
2276 8. The code for checking quota_filecount in the appendfile transport was
2277 allowing one more file than it should have been.
2278
2279 9. For compatibility with Sendmail, the command line option
2280
2281 -prval:sval
2282
2283 is equivalent to
2284
2285 -oMr rval -oMs sval
2286
2287 and sets the incoming protocol and host name (for trusted callers). The
2288 host name and its colon can be omitted when only the protocol is to be set.
2289 Note the Exim already has two private options, -pd and -ps, that refer to
2290 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2291 "s", but I don't think that's a major issue.
2292
229310. A number of refactoring changes to the code, none of which should affect
2294 Exim's behaviour:
2295
2296 (a) The number of logging options was getting close to filling up the
2297 32-bit word that was used as a bit map. I have split them into two classes:
2298 those that are passed in the argument to log_write(), and those that are
2299 only ever tested independently outside of that function. These are now in
2300 separate 32-bit words, so there is plenty of room for expansion again.
2301 There is no change in the user interface or the logging behaviour.
2302
2303 (b) When building, for example, log lines, the code previously used a
2304 macro that called string_cat() twice, in order to add two strings. This is
2305 not really sufficiently general. Furthermore, there was one instance where
2306 it was actually wrong because one of the argument was used twice, and in
2307 one call a function was used. (As it happened, calling the function twice
2308 did not affect the overall behaviour.) The macro has been replaced by a
2309 function that can join an arbitrary number of extra strings onto a growing
2310 string.
2311
2312 (c) The code for expansion conditions now uses a table and a binary chop
2313 instead of a serial search (which was left over from when there were very
2314 few conditions). Also, it now recognizes conditions like "pam" even when
2315 the relevant support is not compiled in: a suitably worded error message is
2316 given if an attempt is made to use such a condition.
2317
231811. Added ${time_interval:xxxxx}.
2319
232012. A bug was causing one of the ddress fields not to be passed back correctly
2321 from remote delivery subprocesses. The field in question was not being
2322 subsequently used, so this caused to problems in practice.
2323
232413. Added new log selectors queue_time and deliver_time.
2325
232614. Might have fixed a bug in maildirsizefile handling that threw up
2327 "unexpected character" debug warnings, and recalculated the data
2328 unnecessarily. In any case, I expanded the warning message to give more
2329 information.
2330
233115. Added the message "Restricted characters in address" to the statements in
2332 the default ACL that block characters like @ and % in local parts.
2333
233416. Change 71 for release 4.31 proved to be much less benign that I imagined.
2335 Three changes have been made:
2336
2337 (a) There was a serious bug; a negative response to MAIL caused the whole
2338 recipient domain to be cached as invalid, thereby blocking all messages
2339 to all local parts at the same domain, from all senders. This bug has
2340 been fixed. The domain is no longer cached after a negative response to
2341 MAIL if the sender used is not empty.
2342
2343 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2344 been restored.
2345
2346 (c) A new callout option, "use_sender" has been added for people who want
2347 the modified behaviour.
2348
2349
2350Exim version 4.31
2351-----------------
2352
2353 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2354 Larry Rosenman.
2355
2356 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2357 indeed breaks things for older releases.
2358
2359 3. Added additional logging to the case where there is a problem reading data
2360 from a filter that is running in a subprocess using a pipe, in order to
2361 try to track down a specific problem.
2362
2363 4. Testing facility fudge: when running in the test harness and attempting
2364 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2365 getting "No route to host". Convert this to a timeout.
2366
2367 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2368 warning.
2369
2370 6. Some OS don't have socklen_t but use size_t instead. This affects the
2371 fifth argument of getsockopt() amongst other things. This is now
2372 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2373 can be set for individual OS. I have set it for SunOS5, OSF1, and
2374 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2375 some earlier ones do not.
2376
2377 7. Change 4.30/15 was not doing the test caselessly.
2378
2379 8. The standard form for an IPv6 address literal was being rejected by address
2380 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2381 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2382 this, as well as the form without the "IPv6" on the front (but only when
2383 address literals are enabled, of course).
2384
2385 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2386
238710. Exim crashed if a message with an empty sender address specified by -f
2388 encountered a router with an errors_to setting. This could be provoked only
2389 by a command such as
2390
2391 exim -f "" ...
2392
2393 where an empty string was supplied; "<>" did not hit this bug.
2394
239511. Installed PCRE release 4.5.
2396
239712. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2398 remained set. It is now erased.
2399
240013. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2401 times from message ids (which are base 36 rather than the normal 62).
2402
240314. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2404 were being counted as actual protocol errors, and logged if the log
2405 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2406 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2407 and DATA following a set of rejected RCPTs do not count as protocol errors.
2408 In other words, Exim assumes they were pipelined, though this may not
2409 actually be the case. Of course, in all cases the client gets an
2410 appropriate error code.
2411
241215. If a lookup fails in an ACL condition, a message about the failure may
2413 be available; it is used if testing the ACL cannot continue, because most
2414 such messages specify what the cause of the deferral is. However, some
2415 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2416 that caused an old message to be retained and used if a later statement
2417 caused a defer, replacing the real cause of the deferral.
2418
241916. If an IP address had so many PTR records that the DNS lookup buffer
2420 was not large enough to hold them, Exim could crash while trying to process
2421 the truncated data. It now detects and logs this case.
2422
242317. Further to 4.21/58, another change has been made: if (and only if) the
2424 first line of a message (the first header line) ends with CRLF, a bare LF
2425 in a subsequent header line has a space inserted after it, so as not to
2426 terminate the header.
2427
242818. Refactoring: tidied an ugly bit of code in appendfile that copied data
2429 unnecessarily, used atoi() instead of strtol(), and didn't check the
2430 termination when getting file sizes from file names by regex.
2431
243219. Completely re-implemented the support for maildirsize files, in the light
2433 of a number of problems with the previous contributed implementation
2434 (4.30/29). In particular:
2435
2436 . If the quota is zero, the maildirsize file is maintained, but no quota is
2437 imposed.
2438
2439 . If the maildir directory does not exist, it is created before any attempt
2440 to write a maildirsize file.
2441
2442 . The quota value in the file is just a cache; if the quota is changed in
2443 the transport, the new value overrides.
2444
2445 . A regular expression is available for excluding directories from the
2446 count.
2447
244820. The autoreply transport checks the characters in options that define the
2449 message's headers; it allows continued headers, but it was checking with
2450 isspace() after an embedded newline instead of explicitly looking for a
2451 space or a tab.
2452
245321. If all the "regular" hosts to which an address was routed had passed their
2454 expiry times, and had not reached their retry times, the address was
2455 bounced, even if fallback hosts were defined. Now Exim should go on to try
2456 the fallback hosts.
2457
245822. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2459 equivalent code in the SMTP transport. Some hosts send humungous responses
2460 to HELO/EHLO, more than 1024 it seems.
2461
246223. Refactoring: code in filter.c used (void *) for "any old type" but this
2463 gives compiler warnings in some environments. I've now done it "properly",
2464 using a union.
2465
246624. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2467 (because of problems with the built-in one) was declared to return uschar *
2468 instead of char *, causing compiler failure.
2469
247025. Fixed a file descriptor leak when processing alias/forward files.
2471
247226. Fixed a minor format string issue in dbfn.c.
2473
247427. Typo in exim.c: ("dmbnz" for "dbmnz").
2475
247628. If a filter file refered to $h_xxx or $message_headers, and the headers
2477 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2478 become corrupted.
2479
248029. When a sender address is verified, it is cached, to save repeating the test
2481 when there is more than one recipient in a message. However, when the
2482 verification involves a callout, it is possible for different callout
2483 options to be set for different recipients. It is too complicated to keep
2484 track of this in the cache, so now Exim always runs a verification when a
2485 callout is required, relying on the callout cache for the optimization.
2486 The overhead is duplication of the address routing, but this should not be
2487 too great.
2488
248930. Fixed a bug in callout caching. If a RCPT command caused the sender address
2490 to be verified with callout=postmaster, and the main callout worked but the
2491 postmaster check failed, the verification correctly failed. However, if a
2492 subsequent RCPT command asked for sender verification *without* the
2493 postmaster check, incorrect caching caused this verification also to fail,
2494 incorrectly.
2495
249631. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2497 it was not caching the DNS options (qualify_single, search_parents) that
2498 were used when the lookup failed. A subsequent lookup with different
2499 options therefore always gave the same answer, though there were cases
2500 where it should not have. (Example: a "domains = !$mx_any" option on a
2501 dnslookup router: the "domains" option is always processed without any
2502 widening, but the router might have qualify_single set.) Now Exim uses the
2503 cached value only when the same options are set.
2504
250532. Added John Jetmore's "exipick" utility to the distribution.
2506
250733. GnuTLS: When an attempt to start a TLS session fails for any reason other
2508 than a timeout (e.g. a certificate is required, and is not provided), an
2509 Exim server now closes the connection immediately. Previously it waited for
2510 the client to close - but if the client is SSL, it seems that they each
2511 wait for each other, leading to a delay before one of them times out.
2512
251334: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2514 maintained 0.8.x compatibility because I don't think many are using it, and
2515 it is clearly obsolete.
2516
251735. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2518 transport.
2519
252036. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2521 client certificate was expired. A simple patch fixes this, though I don't
2522 understand the full logic of why the verify callback is called multiple
2523 times.
2524
252537. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2526 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2527 which causes problems with some clients (such as the Certicom SSL Plus
2528 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2529 disables the coutermeasure allowing Eudora to connect."
2530
253138. Exim was not checking that a write() to a log file succeeded. This could
2532 lead to Bad Things if a log got too big, in particular if it hit a file
2533 size limit. Exim now panics and dies if it cannot write to a log file, just
2534 as it does if it cannot open a log file.
2535
253639. Modified OS/Makefile-Linux so that it now contains
2537
2538 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2539
2540 The two -D definitions ensure that Exim is compiled with large file
2541 support, which makes it possible to handle log files that are bigger than
2542 2^31.
2543
254440. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2545 instance) a domain was checked against a named list that involved a lookup,
2546 causing $domain_data to be set, then another domain was checked against the
2547 same list, then the first domain was re-checked, the value of $domain_data
2548 after the final check could be wrong. In particular, if the second check
2549 failed, it could be set empty. This bug probably also applied to
2550 $localpart_data.
2551
255241. The strip_trailing_dot option was not being applied to the address given
2553 with the -f command-line option.
2554
255542. The code for reading a message's header from the spool was incrementing
2556 $received_count, but never initializing it. This meant that the value was
2557 incorrect (doubled) while delivering a message in the same process in which
2558 it was received. In the most common configuration of Exim, this never
2559 happens - a fresh exec is done - but it can happen when
2560 deliver_drop_privilege is set.
2561
256243. When Exim logs an SMTP synchronization error - client data sent too soon -
2563 it now includes up to 150 characters of the unexpected data in the log
2564 line.
2565
256644. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2567 and building data strings. The size of both of these buffers was 10 000
2568 bytes - far larger than anybody would *ever* want, thought I. Needless to
2569 say, somebody hit the limit. I have increased the maximum line length to
2570 20 000 and the maximum data length of concatenated lines to 100 000. I have
2571 also fixed two bugs, because there was no checking on these buffers. Tsk,
2572 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2573 buffer is too small.
2574
257545. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2576 lsearch lookups. Now it does.
2577
257846. When parsing a route_list item in a manualroute router, a fixed-length
2579 buffer was used for the list of hosts. I made this 1024 bytes long,
2580 thinking that nobody would ever have a list of hosts that long. Wrong.
2581 Somebody had a whole pile of complicated expansion conditions, and the
2582 string was silently truncated, leading to an expansion error. It turns out
2583 that it is easier to change to an unlimited length (owing to other changes
2584 that have happened since this code was originally written) than to build
2585 structure for giving a limitation error. The length of the item that
2586 expands into the list of hosts is now unlimited.
2587
258847. The lsearch lookup could not handle data where the length of text line was
2589 more than 4095 characters. Such lines were truncated, leading to shortened
2590 data being returned. It should now handle lines of any length.
2591
259248. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2593 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2594 ACL").
2595
259649. Cosmetic tidy to scripts like exicyclog that are generated by globally
2597 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2598 no longer happens in comment lines. A list of replacements is now placed
2599 at the head of all of the source files, except those whose only change is
2600 to replace PERL_COMMAND in the very first #! line.
2601
260250. Replaced the slow insertion sort in queue.c, for sorting the list of
2603 messages on the queue, with a bottom-up merge sort, using code contributed
2604 by Michael Haardt. This should make operations like -bp somewhat faster on
2605 large queues. It won't affect queue runners, except when queue_run_in_order
2606 is set.
2607
260851. Installed eximstats 1.31 in the distribution.
2609
261052. Added support for SRV lookups to the dnslookup router.
2611
261253. If an ACL referred to $message_body or $message_body_end, the value was not
2613 reset for any messages that followed in the same SMTP session.
2614
261554. The store-handling optimization for building very long strings was not
2616 differentiating between the different store pools. I don't think this
2617 actually made any difference in practice, but I've tidied it.
2618
261955. While running the routers to verify a sender address, $sender_address
2620 was still set to the sender address. This is wrong, because when routing to
2621 send a bounce to the sender, it would be empty. Therefore, I have changed
2622 it so that, while verifying a sender address, $sender_address is set to <>.
2623 (There is no change to what happens when verifying a recipient address.)
2624
262556. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2626 target A or AAAA records (if not already returned) without resetting the
2627 qualify_single or search_parents options of the DNS resolver. These are
2628 inappropriate in this case because the targets of MX and SRV records must
2629 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2630 target that, when qualified, matched something in the local domain. These
2631 two options are now turned off when doing these lookups.
2632
263357. It seems that at least some releases of Reiserfs (which does not have the
2634 concept of a fixed number of inodes) returns zero and not -1 for the
2635 number of available inodes. This interacted badly with check_spool_inodes,
2636 which assumed that -1 was the "no such thing" setting. What I have done is
2637 to check that the total number of inodes is greater than zero before doing
2638 the test of how many are available.
2639
264058. When a "warn" ACL statement has a log_message modifier, the message is
2641 remembered, and not repeated. This is to avoid a lot of repetition when a
2642 message has many recipients that cause the same warning to be written.
2643 Howewer, Exim was preserving the list of already written lines for an
2644 entire SMTP session, which doesn't seem right. The memory is now reset if a
2645 new message is started.
2646
264759. The "rewrite" debugging flag was not showing the result of rewriting in the
2648 debugging output unless log_rewrite was also set.
2649
265060. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2651 of (int)(handle) when we know that handle contains (void *)(-1).
2652
265361. The Exim daemon panic-logs an error return when it closes the incoming
2654 connection. However "connection reset by peer" seems to be common, and
2655 isn't really an error worthy of noting specially, so that particular error
2656 is no long logged.
2657
265862. When Exim is trying to find all the local interfaces, it used to panic and
2659 die if the ioctl to get the interface flags failed. However, it seems that
2660 on at least one OS (Solaris 9) it is possible to have an interface that is
2661 included in the list of interfaces, but for which you get a failure error
2662 for this call. This happens when the interface is not "plumbed" into a
2663 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2664 failure of the "get flags" call assumes that the interface is down.
2665
266663. Added a ${eval10: operator, which assumes all numbers are decimal. This
2667 makes life easier for people who are doing arithmetic on fields extracted
2668 from dates, where you often get leading zeros that should not be
2669 interpreted as octal.
2670
267164. Added qualify_domain to the redirect router, to override the global
2672 setting.
2673
267465. If a pathologically long header line contained very many addresses (the
2675 report of this problem mentioned 10 000) and each of them was rewritten,
2676 Exim could use up a very large amount of memory. (It kept on making new
2677 copies of the header line as it rewrote, and never released the old ones.)
2678 At the expense of a bit more processing, the header rewriting function has
2679 been changed so that it no longer eats memory in this way.
2680
268166. The generation of the Received: header has been moved from the time that a
2682 message starts to be received, to the time that it finishes. The timestamp
2683 in the Received: header should now be very close to that of the <= log
2684 line. There are two side-effects of this change:
2685
2686 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2687 logged header lines no longer include the local Received: line, because
2688 it has not yet been created. The same applies to a copy of the message
2689 that is returned to a non-SMTP sender when a message is rejected.
2690
2691 (b) When a filter file is tested using -bf, no additional Received: header
2692 is added to the test message. After some thought, I decided that this
2693 is a bug fix.
2694
2695 This change does not affect the value of $received_for. It is still set
2696 after address rewriting, but before local_scan() is called.
2697
269867. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2699
270068. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2701 gave an unhelpful panic error message, and a defer error. I have managed to
2702 change this behaviour so that it now rejects any supplied certificate,
2703 which seems right, as the list of acceptable certificates is empty.
2704
270569. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2706 gave an unhelpful defer error. I have not managed to make this reject any
2707 supplied certificates, but the error message it gives is "no certificate
2708 supplied", which is not helpful.
2709
271070. exigrep's output now also includes lines that are not associated with any
2711 message, but which match the given pattern. Implemented by a patch from
2712 Martin Sluka, which also tidied up the Perl a bit.
2713
271471. Recipient callout verification, like sender verification, was using <> in
2715 the MAIL FROM command. This isn't really the right thing, since the actual
2716 sender may affect whether the remote host accepts the recipient or not. I
2717 have changed it to use the actual sender in the callout; this means that
2718 the cache record is now keyed on a recipient/sender pair, not just the
2719 recipient address. There doesn't seem to be a real danger of callout loops,
2720 since a callout by the remote host to check the sender would use <>.
2721 [SEE ABOVE: changed after hitting problems.]
2722
272372. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2724 temporary errors. However, in the case of such a code being given after
2725 the end of a data transmission (i.e. after ".") Exim was failing to write
2726 a retry record for the message. (Yes, there was some broken host that was
2727 actually sending 8xx at this point.)
2728
272973. An unknown lookup type in a host list could cause Exim to panic-die when
2730 the list was checked. (An example that provoked this was putting <; in the
2731 middle of a list instead of at the start.) If this happened during a DATA
2732 ACL check, a -D file could be left lying around. This kind of configuration
2733 error no longer causes Exim to die; instead it causes a defer errror. The
2734 incident is still logged to the main and panic logs.
2735
273674. Buglet left over from Exim 3 conversion. The message "too many messages
2737 in one connection" was written to the rejectlog but not the mainlog, except
2738 when address rewriting (yes!) was being logged.
2739
274075. Added write_rejectlog option.
2741
274276. When a system filter was run not as root (that is, when system_filter_user
2743 was set), the values of the $n variables were not being returned to the
2744 main process; thus, they were not subsequently available in the $sn
2745 variables.
2746
274777. Added +return_path_on_delivery log selector.
2748
274978. A connection timeout was being treated differently from recipients deferred
2750 when testing hosts_max_try with a message that was older than the host's
2751 retry timeout. (The host should not be counted, thus allowing all hosts to
2752 be tried at least once before bouncing.) This may have been the cause of an
2753 occasionally reported bug whereby a message would remain on the queue
2754 longer than the retry timeout, but would be bounced if a delivery was
2755 forced. I say "may" because I never totally pinned down the problem;
2756 setting up timeout/retry tests is difficult. See also the next item.
2757
275879. The ultimate address timeout was not being applied to errors that involved
2759 a combination of host plus message (for example, a timeout on a MAIL
2760 command). When an address resolved to a number of possible hosts, and they
2761 were not all tried for each delivery (e.g. because of hosts_max_try), a
2762 message could remain on the queue longer than the retry timeout.
2763
276480. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2765 Haardt.
2766
276781. Fixed an obscure SMTP outgoing bug which required at least the following
2768 conditions: (a) there was another message waiting for the same server;
2769 (b) the server returned 5xx to all RCPT commands in the first message so
2770 that the message was not completed; (c) the server dropped the connection
2771 or gave a negative response to the RSET that Exim sends to abort the
2772 transaction. The observed case was a dropped connection after DATA that had
2773 been sent in pipelining mode. That is, the server had advertised PIPELINING
2774 but was not implementing it correctly. The effect of the bug was incorrect
2775 behaviour, such as trying another host, and this could lead to a crash.
2776
2777
2778Exim version 4.30
2779-----------------
2780
2781 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2782 and daemon.c were passed as pointers to ints; they should have been
2783 pointers to socklen_t variables (which are typically unsigned ints).
2784
2785 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2786 fixed.
2787
2788 3. Fixed a really odd bug that affected only the testing scheme; patching a
2789 certain fixed string in the binary changed the value of another string that
2790 happened to be identical to the end of the original first string.
2791
2792 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2793 name", it returns that address as the IP address. On some operating
2794 systems (e.g. Solaris), it also passes back the IP address string as the
2795 "host name". However, on others (e.g. Linux), it passes back an empty
2796 string. Exim wasn't checking for this, and was changing the host name to an
2797 empty string, assuming it had been canonicized.
2798
2799 5. Although rare, it is permitted to have more than one PTR record for a given
2800 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2801 all the names associated with an address, because they do in Solaris.
2802 However, it seems that they do not in Linux for data that comes from the
2803 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2804 I found this out when I moved to a new Linux workstation and tried to run
2805 the Exim test suite.
2806
2807 To get round this problem I have changed the code so that it now does its
2808 own call to the DNS to look up PTR records when searching for a host name.
2809 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2810 addresses that are only in /etc/hosts are still found.
2811
2812 This behaviour is, however, controlled by an option called host_lookup_
2813 order, which defaults to "bydns:byaddr". If people want to use the other
2814 order, or indeed, just use one or the other means of lookup, they can
2815 specify it in this variable.
2816
2817 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2818 some operating systems, this comes back from gethostbyaddr() as an empty
2819 string, and this is what Exim used to test for. However, it seems that in
2820 other systems, "." is yielded. Exim now tests for this case too.
2821
2822 7. The values of check_spool_space and check_log_space are now held internally
2823 as a number of kilobytes instead of an absolute number of bytes. If a
2824 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2825 kilobyte. This means that much larger values can be stored.
2826
2827 8. Exim monitor: an attempt to get the action menu when not actually pointing
2828 at a message produces an empty menu entitled "No message selected". This
2829 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2830 no entries in it ("Shell widget menu has zero width and/or height"). So I
2831 have added a single, blank menu entry in this case.
2832
2833 9. Added ${quote_local_part.
2834
283510. MIME decoding is now applied to the contents of Subject: header lines when
2836 they are logged.
2837
283811. Now that a reference to $sender_host_address automatically causes a reverse
2839 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2840 host lookup before query-style lookups in lists that might use this
2841 variable. This has therefore been abolished, and the "net-" prefix is no
2842 longer necessary for query-style lookups.
2843
284412. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2845 have been a typo for LFLAGS, so it has been changed.
2846
284713. The install script calls Exim with "-C /dev/null" in order to find the
2848 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2849 to be output. Howeve, since Exim outputs its version number before the
2850 error, it didn't break the script. It just looked ugly. I fixed this by
2851 always allowing "-C /dev/null" if the caller is root.
2852
285314. Ignore overlarge ACL variable number when reading spool file - insurance
2854 against a later release with more variables having written the file.
2855
285615. The standard form for an IPv6 address literal was being rejected by EHLO.
2857 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2858 this, as well as the form without the "IPv6" on the front.
2859
286016. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2861 OS/Makefile-Darwin file.
2862
286317. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2864 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2865
286618. After change 4.21/52, "%ld" was used to format the contents of the $inode
2867 variable. However, some OS use ints for inodes. I've added cast to long int
2868 to get rid of the compiler warning.
2869
287019. I had forgotten to lock out "/../" in configuration file names when
2871 ALT_CONFIG_PREFIX was set.
2872
287320. Routers used for verification do not need to specify transports. However,
2874 if such a router generated a host list, and callout was configured, Exim
2875 crashed, because it could not find a port number from the (non-existent)
2876 transport. It now assumes port 25 in this circumstance.
2877
287821. Added the -t option to exigrep.
2879
288022. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2881 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2882 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2883 them is set, LOOKUP_LSEARCH is forced.
2884
288523. "exim -bV" now outputs a list of lookups that are included in the binary.
2886
288724. Added sender and host information to the "rejected by local_scan()" log
2888 line; previously there was no indication of these.
2889
289025. Added .include_if_exists.
2891
289226. Change 3.952/11 added an explicit directory sync on top of a file sync for
2893 Linux. It turns out that not all file systems support this. Apparently some
2894 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2895 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2896 not supported on the file descriptor, is now ignored when Exim is trying to
2897 sync a directory. This applies only to Linux.
2898
289927. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2900
290128. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2902 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2903 this.
2904
290529. Added support for maildirsize files from supplied patch (modified a bit).
2906
290730. The use of :fail: followed by an empty string could lead Exim to respond to
2908 sender verification failures with (e.g.):
2909
2910 550 Verification failed for <xxx>
2911 550 Sender verify failed
2912
2913 where the first response line was missing the '-' that indicates it is not
2914 the final line of the response.
2915
291631. The loop for finding the name of the user that called Exim had a hardwired
2917 limit of 10; it now uses the value of finduser_retries, which is used for
2918 all other user lookups.
2919
292032. Added $received_count variable, available in data and not_smtp ACLs, and at
2921 delivery time.
2922
292333. Exim was neglecting to zero errno before one call of strtol() when
2924 expanding a string and expecting an integer value. On some systems this
2925 resulted in spurious "integer overflow" errors. Also, it was casting the
2926 result into an int without checking.
2927
292834. Testing for a connection timeout using "timeout_connect" in the retry rules
2929 did not work. The code looks as if it has *never* worked, though it appears
2930 to have been documented since at least releast 1.62. I have made it work.
2931
293235. The "timeout_DNS" error in retry rules, also documented since at least
2933 1.62, also never worked. As it isn't clear exactly what this means, and
2934 clearly it isn't a major issue, I have abolished the feature by treating it
2935 as "timeout", and writing a warning to the main and panic logs.
2936
293736. The display of retry rules for -brt wasn't always showing the error code
2938 correctly.
2939
294037. Added new error conditions to retry rules: timeout_A, timeout_MX,
2941 timeout_connect_A, timeout_connect_MX.
2942
294338. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2944 to the empty sender.
2945
294639. The daemon was not analysing the content of -oX till after it had closed
2947 stderr and disconnected from the controlling terminal. This meant that any
2948 syntax errors were only noted on the panic log, and the return code from
2949 the command was 0. By re-arranging the code a little, I've made the
2950 decoding happen first, so such errors now appear on stderr, and the return
2951 code is 1. However, the actual setting up of the sockets still happens in
2952 the disconnected process, so errors there are still only recorded on the
2953 panic log.
2954
295540. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2956 connections (as happens on some IP stacks) was logged at start up time as
2957 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2958 it from "IPv6 and IPv4", which means that two separate sockets are being
2959 used.
2960
296141. The debug output for gethostbyname2() or getipnodebyname() failures now
2962 says whether AF_INET or AF_INET6 was passed as an argument.
2963
296442. Exiwhat output was messed up when time zones were included in log
2965 timestamps.
2966
296743. Exiwhat now gives more information about the daemon's listening ports,
2968 and whether -tls-on-connect was used.
2969
297044. The "port" option of the smtp transport is now expanded.
2971
297245. A "message" modifier in a "warn" statement in a non-message ACL was being
2973 silently ignored. Now an error message is written to the main and panic
2974 logs.
2975
297646. There's a new ACL modifier called "logwrite" which writes to a log file
2977 as soon as it is encountered.
2978
297947. Added $local_user_uid and $local_user_gid at routing time.
2980
298148. Exim crashed when trying to verify a sender address that was being
2982 rewritten to "<>".
2983
298449. Exim was recognizing only a space character after ".include". It now also
2985 recognizes a tab character.
2986
298750. Fixed several bugs in the Perl script that creates the exim.8 man page by
2988 extracting the relevant information from the specification. The man page no
2989 longer contains scrambled data for the -d option, and I've added a section
2990 at the front about calling Exim under different names.
2991
299251. Added "extra_headers" argument to the "mail" command in filter files.
2993
299452. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2995 crash.
2996
299753. Installed eximstats 1.29.
2998
299954. Added transport_filter_timeout as a generic transport option.
3000
300155. Exim no longer adds an empty Bcc: header to messages that have no To: or
3002 Cc: header lines. This was required by RFC 822, but it not required by RFC
3003 2822.
3004
300556. Exim used to add From:, Date:, and Message-Id: header lines to any
3006 incoming messages that did not have them. Now it does so only if the
3007 message originates locally, that is, if there is no associated remote host
3008 address. When Resent- header lines are present, this applies to the Resent-
3009 lines rather than the non-Resent- lines.
3010
301157. Drop incoming SMTP connection after too many syntax or protocol errors. The
3012 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3013
301458. Messages for configuration errors now include the name of the main
3015 configuration file - useful now that there may be more than one file in a
3016 list (.included file names were always shown).
3017
301859. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3019 for those rare installations that do not start the daemon as root or run it
3020 setuid root. I've cut out the call to initgroups() if the daemon is not
3021 root at that time.
3022
302360. The Exim user and group can now be bound into the binary as text strings
3024 that are looked up at the start of Exim's processing.
3025
302661. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3027
302862. Added $mailstore_basename variable.
3029
303063. Installed patch to sieve.c from Michael Haardt.
3031
303264. When Exim failed to open the panic log after failing to open the main log,
3033 the original message it was trying to log was written to stderr and debug
3034 output, but if they were not available (the usual case in production), it
3035 was lost. Now it is written to syslog before the two lines that record the
3036 failures to open the logs.
3037
303865. Users' Exim filters run in subprocesses under the user's uid. It is
3039 possible for a "deliver" command or an alias in a "personal" command to
3040 provoke an address rewrite. If logging of address rewriting is configured,
3041 this fails because the process is not running as root or exim. There may be
3042 a better way of dealing with this, but for the moment (because 4.30 needs
3043 to be released), I have disabled address rewrite logging when running a
3044 filter in a non-root, non-exim process.
3045
3046
3047Exim version 4.24
3048-----------------
3049
3050 1. The buildconfig auxiliary program wasn't quoting the value set for
3051 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3052 not defined. This bug was masked in 4.22 by the effect that was fixed in
3053 change 4.23/1.
3054
3055 2. Some messages that were rejected after a message id was allocated were
3056 shown as "incomplete" by exigrep. It no longer does this for messages that
3057 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3058
3059 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3060 have allow_domain_literals set, the ID did not get logged in the <= line.
3061 Domain literals are now always recognized in Message-ID: header lines.
3062
3063 4. The first argument for a ${extract expansion item is the key name or field
3064 number. Leading and trailing spaces in this item were not being ignored,
3065 causing some misleading effects.
3066
3067 5. When deliver_drop_privilege was set, single queue runner processes started
3068 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3069 same command in the process it spins off) were not dropping privilege.
3070
3071 6. When the daemon running as "exim" started a queue runner, it always
3072 re-executed Exim in the spun-off process. This is a waste of effort when
3073 deliver_drop_privilege is set. The new process now just calls the
3074 queue-runner function directly.
3075
3076
3077Exim version 4.23
3078-----------------
3079
3080 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3081 HEADERS_CHARSET.
3082
3083 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3084 ignored. Though the use of -oP was forcing the writing of a pid file, it
3085 was always written to the default place.
3086
3087 3. If the message "no IP address found for host xxxx" is generated during
3088 incoming verification, it is now followed by identification of the incoming
3089 connection (so you can more easily find what provoked it).
3090
3091 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3092
3093 5. Added some features to "harden" Exim a bit more against certain attacks:
3094
3095 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3096 be put in Local/Makefile. This is like the never_users runtime option,
3097 but it cannot be overridden. The default setting is "root".
3098
3099 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3100 prefix string with which any file named in a -C command line option
3101 must start.
3102
3103 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3104 is retained for -C and -D only if the caller of Exim is root. Without
3105 it, the exim user may also use -C and -D and retain privilege.
3106
3107 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3108 command line option is disabled.
3109
3110 6. Macro names set by the -D option must start with an upper case letter, just
3111 like macro names defined in the configuration file.
3112
3113 7. Added "dereference=" facility to LDAP.
3114
3115 8. Two instances of the typo "uknown" in the source files are fixed.
3116
3117 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3118 the Configure-Makefile script screwed up while processing it.
3119
312010. Incorporated PCRE 4.4.
3121
312211. The SMTP synchronization check was not operating right at the start of an
3123 SMTP session. For example, it could not catch a HELO sent before the client
3124 waited for the greeting. There is now a check for outstanding input at the
3125 point when the greeting is written. Because of the duplex, asynchronous
3126 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3127 way, but not yet received, when the check is performed.
3128
312912. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3130 on TCP/IP sockets, because this apparently causes some broken clients to
3131 timeout.
3132
313313. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3134 unchanged) from the Cygwin maintainer.
3135
313614. The code for -bV that shows what is in the binary showed "mbx" when maildir
3137 was supported instead of testing for mbx. Effectively a typo.
3138
313915. The spa authenticator server code was not checking that the input it
3140 received was valid base64.
3141
314216. The debug output line for the "set" modifier in ACLs was not showing the
3143 name of the variable that was being set.
3144
314517. Code tidy: the variable type "vtype_string" was never used. Removed it.
3146
314718. Previously, a reference to $sender_host_name did not cause a DNS reverse
3148 lookup on its own. Something else was needed to trigger the lookup. For
3149 example, a match in host_lookup or the need for a host name in a host list.
3150 Now, if $sender_host_name is referenced and the host name has not yet been
3151 looked up, a lookup is performed. If the lookup fails, the variable remains
3152 empty, and $host_lookup_failed is set to "1".
3153
315419. Added "eqi" as a case-independent comparison operator.
3155
315620. The saslauthd authentication condition could segfault if neither service
3157 nor realm was specified.
3158
315921. If an overflowing value such as "2048M" was set for message_size_limit, the
3160 error message that was logged was misleading, and incoming SMTP
3161 connections were dropped. The message is now more accurate, and temporary
3162 errors are given to SMTP connections.
3163
316422. In some error situations (such as 21 above) Exim rejects all SMTP commands
3165 (except RSET) with a 421 error, until QUIT is received. However, it was
3166 failing to send a response to QUIT.
3167
316823. The HELO ACL was being run before the code for helo_try_verify_hosts,
3169 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3170 ACL is now run after the helo_try_verify_hosts code.
3171
317224. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3173 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3174 case-independent, so other case variants are also recognized). Apparently
3175 some systems use these upper case variants.
3176
317725. If more than two messages were waiting for the same host, and a transport
3178 filter was specified for the transport, Exim sent two messages over the
3179 same TCP/IP connection, and then failed with "socket operation on non-
3180 socket" when it tried to send the third.
3181
318226. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3183
318427. The extern definition of crypt16() in expand.c was not being excluded when
3185 the OS had its own crypt16() function.
3186
318728. Added bounce_return_body as a new option, and bounce_return_size_limit
3188 as a preferred synonym for return_size_limit, both as an option and as an
3189 expansion variable.
3190
319129. Added LIBS=-liconv to OS/Makefile-OSF1.
3192
319330. Changed the default configuration ACL to relax the local part checking rule
3194 for addresses that are not in any local domains. For these addresses,
3195 slashes and pipe symbols are allowed within local parts, but the sequence
3196 /../ is explicitly forbidden.
3197
319831. SPA server authentication was not clearing the challenge buffer before
3199 using it.
3200
320132. log_message in a "warn" ACL statement was writing to the reject log as
3202 well as to the main log, which contradicts the documentation and doesn't
3203 seem right (because no rejection is happening). So I have stopped it.
3204
320533. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3206 However, I am unable to do any testing of this.
3207
320834. Fixed an infelicity in the appendfile transport. When checking directories
3209 for a mailbox, to see if any needed to be created, it was accidentally
3210 using path names with one or more superfluous leading slashes; tracing
3211 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3212
321335. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3214 contents are added to the log line that is written for every discarded
3215 recipient. (Previously a log_message setting was ignored.)
3216
321736. The ${quote: operator now quotes the string if it is empty.
3218
321937. The install script runs exim in order to find its version number. If for
3220 some reason other than non-existence or emptiness, which it checks, it
3221 could not run './exim', it was installing it with an empty version number,
3222 i.e. as "exim-". This error state is now caught, and the installation is
3223 aborted.
3224
322538. An argument was missing from the function that creates an error message
3226 when Exim fails to connect to the socket for saslauthd authentication.
3227 This could cause Exim to crash, or give a corrupted message.
3228
322939. Added isip, isip4, and isip6 to ${if conditions.
3230
323140. The ACL variables $acl_xx are now saved with the message, and can be
3232 accessed later in routers, transports, and filters.
3233
323441. The new lookup type nwildlsearch is like wildlsearch, except that the key
3235 strings in the file are not string-expanded.
3236
323742. If a MAIL command specified a SIZE value that was too large to fit into an
3238 int variable, the check against message_size_limit failed. Such values are
3239 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3240 day this will have to be increased, but I don't think I want to be around
3241 when emails are that large.
3242
3243
3244
3245Exim version 4.22
3246-----------------
3247
3248 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3249 iconv() is not standard in FreeBSD.
3250
3251 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3252 IPv6 enabled. The observed symptom was a segmentation fault on return from
3253 the function os_common_find_running_interfaces() in src/os.c.
3254
3255 3. In the check_special_case() function in daemon.c I had used "errno" as an
3256 argument name, which causes warnings on some systems. This was basically a
3257 typo, since it was named "eno" in the comments!
3258
3259 4. The code that waits for the clock to tick (at a resolution of some fraction
3260 of a second) so as to ensure message-id uniqueness was always waiting for
3261 at least one whole tick, when it could have waited for less. [This is
3262 almost certainly not relevant at current processor speeds, where it is
3263 unlikely to ever wait at all. But we try to future-proof.]
3264
3265 5. The function that sleeps for a time interval that includes fractions of a
3266 second contained a race. It did not block SIGALRM between setting the
3267 timer, and suspending (a couple of lines later). If the interval was short
3268 and the sigsuspend() was delayed until after it had expired, the suspension
3269 never ended. On busy systems this could lead to processes getting stuck for
3270 ever.
3271
3272 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3273 process, before it forks any delivery processes. The open lookup caching
3274 mechanism meant that the open file or database connection was passed into
3275 the delivery process. The problem was that delivery processes always tidy
3276 up cached lookup data. This could cause a problem for the next delivery
3277 process started by the queue runner, because the external queue runner
3278 process does not know about the closure. So the next delivery process
3279 still has data in the lookup cache. In the case of a file lookup, there was
3280 no problem because closing a file descriptor in a subprocess doesn't affect
3281 the parent. However, if the lookup was caching a connection to a database,
3282 the connection was closed, and the second delivery process was likely to
3283 see errors such as "PGSQL: query failed: server closed the connection
3284 unexpectedly". The problem has been fixed by closing all cached lookups
3285 in a queue runner before running a delivery process.
3286
3287 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3288 seem to have the "const" qualifier which it has on other OS. I've
3289 parameterised it.
3290
3291 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3292 *of the same type* (client or server) with the same public name that an
3293 error should be diagnosed.
3294
3295 9. When Exim looked up a host name for an IP address, but failed to find the
3296 original IP address when looking up the host name (a safety check), it
3297 output the message "<ip address> does not match any IP for NULL", which was
3298 confusing, to say the least. The bug was that the host name should have
3299 appeared instead of "NULL".
3300
330110. Since release 3.03, if Exim is called by a uid other than root or the Exim
3302 user that is built into the binary, and the -C or -D options is used, root
3303 privilege is dropped before the configuration file is read. In addition,
3304 logging is switched to stderr instead of the normal log files. If the
3305 configuration then re-defines the Exim user, the unprivileged environment
3306 is probably not what is expected, so Exim logs a panic warning message (but
3307 proceeds).
3308
3309 However, if deliver_drop_privilege is set, the unprivileged state may well
3310 be exactly what is intended, so the warning has been cut out in that case,
3311 and Exim is allowed to try to write to its normal log files.
3312
3313
3314Exim version 4.21
3315-----------------
3316
3317 1. smtp_return_error_details was not giving details for temporary sender
3318 or receiver verification errors.
3319
3320 2. Diagnose a configuration error if two authenticators have the same public
3321 name.
3322
3323 3. Exim used not to create the message log file for a message until the first
3324 delivery attempt. This could be confusing when incoming messages were held
3325 for policy or load reasons. The message log file is now created at the time
3326 the message is received, and an initial "Received" line is written to it.
3327
3328 4. The automatically generated man page for command line options had a minor
3329 bug that caused no ill effects; however, a more serious problem was that
3330 the procedure for building the man page automatically didn't always
3331 operate. Consequently, release 4.20 contains an out-of-date version. This
3332 shouldn't happen again.
3333
3334 5. When building Exim with embedded Perl support, the script that builds the
3335 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3336 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3337
3338 6. The freeze_tell option was not being used for messages that were frozen on
3339 arrival, either by an ACL or by local_scan().
3340
3341 7. Added the smtp_incomplete_transaction log selector.
3342
3343 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3344 was accepting AUTH without a new EHLO.
3345
3346 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3347 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3348 RFC.
3349
335010. Logging of TCP/IP connections (when configured) now happens in the main
3351 daemon process instead of the child process, so that the TCP/IP connection
3352 count is more accurate (but it can never be perfect).
3353
335411. The use of "drop" in a nested ACL was not being handled correctly in the
3355 outer ACL. Now, if condition failure induced by the nested "drop" causes
3356 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3357 or "require"), the connection is dropped.
3358
335912. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3360 that yield "discard" can now be used with an "accept" or a "discard" verb,
3361 but an error is generated for any others (because I can't see a useful way
3362 to define what should happen).
3363
336413. When an ACL is read dynamically from a file (or anywhere else), the lines
3365 are now processed in the same way as lines in the Exim configuration file.
3366 In particular, continuation lines are supported.
3367
336814. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3369
337015. Added -ti meaning -t -i.
3371
337216. Check for letters, digits, hyphens, and dots in the names of dnslist
3373 domains, and warn by logging if others are found.
3374
337517. At least on BSD, alignment is not guarenteed for the array of ifreq's
3376 returned from GIFCONF when Exim is trying to find the list of interfaces on
3377 a host. The code in os.c has been modified to copy each ifreq to an aligned
3378 structure in all cases.
3379
3380 Also, in some cases, the returned ifreq's were being copied to a 'struct
3381 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3382 means the last couple of bytes of an IPv6 address could be chopped if the
3383 ifreq contained only a normal sockaddr (14 bytes storage).
3384
338518. Named domain lists were not supported in the hosts_treat_as_local option.
3386 An entry such as +xxxx was not recognized, and was treated as a literal
3387 domain name.
3388
338919. Ensure that header lines added by a DATA ACL are included in the reject log
3390 if the ACL subsequently rejects the message.
3391
339220. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3393 MD5 (which is deprecated).
3394
339521. When testing a filter file using -bf, Exim was writing a message when it
3396 took the sender from a "From " line in the message, but it was not doing so
3397 when it took $return_path from a Return-Path: header line. It now does.
3398
339922. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3400 with a valid header line field name (a series of printing characters
3401 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3402
340323. Changed "disc" in the source to "disk" to conform to the documentation and
3404 the book and for uniformity.
3405
340624. Ignore Sendmail's -Ooption=value command line item.
3407
340825. When execve() failed while trying to run a command in a pipe transport,
3409 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3410 could be confused with a return value of 69 from the command itself. This
3411 has been changed to 127, the value the shell returns if it is asked to run
3412 a non-existent command. The wording for the related log line suggests a
3413 non-existent command as the problem.
3414
341526. If received_header_text expands to an empty string, do not add a Received:
3416 header line to the message. (Well, it adds a token one on the spool, but
3417 marks it "old" so that it doesn't get used or transmitted.)
3418
341927. Installed eximstats 1.28 (addition of -nt option).
3420
342128. There was no check for failure on the call to getsockname() in the daemon
3422 code. This can fail if there is a shortage of resources on the system, with
3423 ENOMEM, for example. A temporary error is now given on failure.
3424
342529. Contrary to the C standard, it seems that in some environments, the
3426 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3427 program. Exim now does this explicitly; it affects the formatting of
3428 timestamps using strftime().
3429
343030. If exiqsumm was given junk data, it threw up some uninitialized variable
3431 complaints. I've now initialized all the variables, to avoid this.
3432
343332. Header lines added by a system filter were not being "seen" during
3434 transport-time rewrites.
3435
343633. The info_callback() function passed to OpenSSL is set up with type void
3437 (*)(SSL *, int, int), as described somewhere. However, when calling the
3438 function (actually a macro) that sets it up, the type void(*)() is
3439 expected. I've put in a cast to prevent warnings from picky compilers.
3440
344134. If a DNS black list lookup found a CNAME record, but there were no A
3442 records associated with the domain it pointed at, Exim crashed.
3443
344435. If a DNS black list lookup returned more than one A record, Exim ignored
3445 all but the first. It now scans all returned addresses if a particular IP
3446 value is being sought. In this situation, the contents of the
3447 $dnslist_value variable are a list of all the addresses, separated by a
3448 comma and a space.
3449
345036. Tightened up the rules for host name lookups using reverse DNS. Exim used
3451 to accept a host name and all its aliases if the forward lookup for any of
3452 them yielded the IP address of the incoming connection. Now it accepts only
3453 those names whose forward lookup yields the correct IP address. Any other
3454 names are discarded. This closes a loophole whereby a rogue DNS
3455 administrator could create reverse DNS records to break through a
3456 wildcarded host restriction in an ACL.
3457
345837. If a user filter or a system filter that ran in a subprocess used any of
3459 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3460 the wrong values were passed to the pipe command ($thisaddress had the
3461 value of $0, $0 had the value of $1, etc). This bug was introduced by
3462 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3463
346438. Improved the line breaking for long SMTP error messages from ACLs.
3465 Previously, if there was no break point between 40 and 75 characters, Exim
3466 left the rest of the message alone. Two changes have been made: (a) I've
3467 reduced the minimum length to 35 characters; (b) if it can't find a break
3468 point between 35 and 75 characters, it looks ahead and uses the first one
3469 that it finds. This may give the occasional overlong line, but at least the
3470 remaining text gets split now.
3471
347239. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3473 file descriptors might be low, and that setting 1000 would always raise it.
3474 It turns out that in some environments, the limit is already over 1000 and
3475 that lowering it causes trouble. So now Exim takes care not to decrease it.
3476
347740. When delivering a message, the value of $return_path is set to $sender_
3478 address at the start of routing (routers may change the value). By an
3479 oversight, this default was not being set up when an address was tested by
3480 -bt or -bv, which affected the outcome if any router or filter referred to
3481 $return_path.
3482
348341. The idea of the "warn" ACL verb is that it adds a header or writes to the
3484 log only when "message" or "log_message" are set. However, if one of the
3485 conditions was an address verification, or a call to a nested ACL, the
3486 messages generated by the underlying test were being passed through. This
3487 no longer happens. The underlying message is available in $acl_verify_
3488 message for both "message" and "log_message" expansions, so it can be
3489 passed through if needed.
3490
349142. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3492 new expansion $bh_ to give the encoded byte string without charset
3493 translation. Translation happens only if iconv() is available; HAVE_ICONV
3494 indicates this at build time. HEADERS_CHARSET gives the charset to
3495 translate to; headers_charset can change it in the configuration, and
3496 "headers charset" can change it in an individual filter file.
3497
349843. Now that we have a default RFC 2047 charset (see above), the code in Exim
3499 that creates RFC 2047 encoded "words" labels them as that charset instead
3500 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3501 expansion operator; (ii) when Exim creates a From: line for a local
3502 message; (iii) when a header line is rewritten to include a "phrase" part.
3503
350444. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3505 buggy, causing it to skip the first lines of messages whose message ID
3506 ended in 'D'. This would not have bitten before Exim release 4.14, because
3507 message IDs were unlikely to end in 'D' before then. The effect was to have
3508 incorrect size information for certain domains.
3509
351045. #include "config.h" was missing at the start of the crypt16.c module. This
3511 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3512 noticed.
3513
351446. If there was a timeout during a "random" callout check, Exim treated it as
3515 a failure of the random address, and carried on sending RSET and the real
3516 address. If the delay was just some slowness somewhere, the response to the
3517 original RCPT would be taken as a response to RSET and so on, causing
3518 mayhem of various kinds.
3519
352047. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3521 when I implemented it. It didn't allow for the fact that some option values
3522 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3523 the right test for positive values.
3524
352548. Domain names in DNS records are case-independent. Exim always looks them up
3526 in lower case. Some resolvers return domain names in exactly the case they
3527 appear in the zone file, that is, they may contain uppercase letters. Not
3528 all resolvers do this - some return always lower case. Exim was treating a
3529 change of case by a resolver as a change of domain, similar to a widening
3530 of a domain abbreviation. This triggered its re-routing code and so it was
3531 trying to route what was effectively the same domain again. This normally
3532 caused routing to fail (because the router wouldn't handle the domain
3533 twice). Now Exim checks for this case specially, and just changes the
3534 casing of the domain that it ultimately uses when it transmits the message
3535 envelope.
3536
353749. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3538 module.
3539
354050. If a filter generated a file delivery with a non-absolute name (possible if
3541 no home directory exists for the router), the forbid_file option was not
3542 forbidding it.
3543
354451. Added '&' feature to dnslists, to provide bit mask matching in addition to
3545 the existing equality matching.
3546
354752. Exim was using ints instead of ino_t variables in some places where it was
3548 dealing with inode numbers.
3549
355053. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3551 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3552 called TMPDIR, and if it finds it is different, it changes its value.
3553
355454. The smtp_printf() function is now made available to local_scan() so
3555 additional output lines can be written before returning. There is also an
3556 smtp_fflush() function to enable the detection of a dropped connection.
3557 The variables smtp_input and smtp_batched_input are exported to
3558 local_scan().
3559
356055. Changed the default runtime configuration: the message "Unknown user"
3561 has been removed from the ACL, and instead placed on the localuser router,
3562 using the cannot_route_message feature. This means that any verification
3563 failures that generate their own messages won't get overridden. Similarly,
3564 the "Unrouteable address" message that was in the ACL for unverifiable
3565 relay addresses has also been removed.
3566
356756. Added hosts_avoid_esmtp to the smtp transport.
3568
356957. The exicyclog script was not checking for the esoteric option
3570 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3571 will work only if exicyclog is run under the appropriate euid.
3572
357358. Following a discussion on the list, the rules by which Exim recognises line
3574 endings on incoming messages have been changed. The -dropcr and drop_cr
3575 options are now no-ops, retained only for backwards compatibility. The
3576 following line terminators are recognized: LF CRLF CR. However, special
3577 processing applies to CR:
3578
3579 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3580 nor a local message in the state where . is a terminator.
3581
3582 (ii) If a bare CR is encountered in a header line, an extra space is added
3583 after the line terminator so as not to end the header. The reasoning
3584 behind this is that bare CRs in header lines are most likely either
3585 to be mistakes, or people trying to play silly games.
3586
358759. The size of a message, as listed by "-bp" or in the Exim monitor window,
3588 was being incorrectly given as 18 bytes larger than it should have been.
3589 This is a VOB (very old bug).
3590
359160. This may never have affected anything current, but just in case it has:
3592 When the local host is found other than at the start of a list of hosts,
3593 the local host, those with the same MX, and any that follow, are discarded.
3594 When the list in question was part of a longer list of hosts, the following
3595 hosts (not currently being processed) were also being discarded. This no
3596 longer happens. I'm not sure if this situation could ever has previously
3597 arisen.
3598
359961. Added the "/MX" feature to lists of hosts in the manualroute and query
3600 program routers.
3601
360262. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3603 header. This is something that is recommended in a new Internet Draft, and
3604 is something that is documented as being done by Sendmail. There are two
3605 possible values. For messages generated by the autoreply transport, Exim
3606 adds:
3607
3608 Auto-Submitted: auto-replied
3609
3610 whereas for all other generated messages (e.g. bounces) it adds
3611
3612 Auto-Submitted: auto-generated
3613
361463. The "personal" condition in filters now includes a test for the
3615 Auto-Submitted: header. If it contains the string "auto-" the message it
3616 not considered personal.
3617
361864. Added rcpt_include_affixes as a generic transport option.
3619
362065. Added queue_only_override (default true).
3621
362266. Added the syslog_duplication option.
3623
362467. If what should have been the first header line of a message consisted of
3625 a space followed by a colon, Exim was mis-interpreting it as a header line.
3626 It isn't of course - it is syntactically invalid and should therefore be
3627 treated as the start of the message body. The misbehaviour could have
3628 caused a number of strange effects, including loss of data in subsequent
3629 header lines, and spool format errors.
3630
363168. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3632 client host had authenticated. This control can now be exercised by an ACL
3633 for more flexibility.
3634
363569. By default, callouts do not happen when testing with -bh. There is now a
3636 variant, -bhc, which does actually run the callout code, including
3637 consulting and updating the callout cache.
3638
363970. Added support for saslauthd authentication, courtesy of Alexander
3640 Sabourenkov.
3641
364271. If statvfs() failed on the spool or log directories while checking their
3643 size for availability, Exim confusingly gave the error "space shortage".
3644 Furthermore, in debugging mode it crashed with a floating point exception.
3645 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3646 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3647 serious problem, Exim now writes to the main and panic logs when this
3648 happens, with details of the failure. It then refuses to accept the
3649 incoming message, giving the message "spool directory problem" or "log
3650 directory problem" with a 421 code for SMTP messages.
3651
365272. When Exim is about to re-exec itself, it ensures that the file descriptors
3653 0, 1, and 2 exist, because some OS complain for execs without them (see
3654 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3655 descriptors. However, the code omitted to check that the open succeeded,
3656 causing mysterious errors if for some reason the permissions on /dev/null
3657 got screwed. Now Exim writes a message to the main and panic logs, and
3658 bombs out if it can't open /dev/null.
3659
366073. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3661 interact so that it is all more flexible. It is supposed to remain
3662 backwards compatible. Also added extra_local_interfaces.
3663
366474. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3665 to bomb out with an assertion failure - to the client this appears as a
3666 connection drop. This problem occurs in the part of the code that was taken
3667 from the Samba project. Fortunately, the assertion is in a very simple
3668 function, so I have fixed this by reproducing the function inline in the
3669 one place where it is called, and arranging for authentication to fail
3670 instead of killing the process with assert().
3671
367275. The SPA client code was not working when the server requested OEM rather
3673 than Unicode encoding.
3674
367576. Added code to make require_files with a specific uid setting more usable in
3676 the case where statting the file as root fails - usually a non-root-mounted
3677 NFS file system. When this happens and the failure is EACCES, Exim now
3678 forks a subprocess and does the per-uid checking as the relevant uid.
3679
368077. Added process_log_path.
3681
368278. If log_file_path was not explicitly set, a setting of check_log_space or
3683 check_log_inodes was ignored.
3684
368579. If a space check for the spool or log partitions fails, the incident is now
3686 logged. Of course, in the latter case the data may get lost...
3687
368880. Added the %p formatting code to string_format() so that it can be used to
3689 print addresses in debug_print(). Adjusted all the address printing in the
3690 debugging in store.c to use %p rather than %d.
3691
369281. There was a concern that a line of code in smtp_in.c could overflow a
3693 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As