Do not write to syslog when running in the test harness.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
9675b384 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.293 2006/02/13 11:28:56 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
9675b384
PH
140PH/25 Do not write to syslog when running in the test harness. The only
141 occasion when this arises is a failure to open the main or panic logs
142 (for which there is an explicit test).
143
1349e1e5 144
214e2000 145
5de37277
PH
146Exim version 4.60
147-----------------
148
cc38ddbf
PH
149PH/01 Two changes to the default runtime configuration:
150
151 (1) Move the checks for relay_from_hosts and authenticated clients from
152 after to before the (commented out) DNS black list checks.
153
154 (2) Add control=submission to the relay_from_hosts and authenticated
155 clients checks, on the grounds that messages accepted by these
156 statements are most likely to be submissions.
5de37277 157
72fdd6ae
PH
158PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
159
160 (1) Generate an error if the third argument for the ${prvs expansion is
161 not a single digit.
162
163 (2) Treat a missing third argument of ${prvscheck as if it were an empty
164 string.
165
166 (3) Reset the variables that are obtained from the first argument of
167 ${prvscheck and used in the second argument before leaving the code,
168 because their memory is reclaimed, so using them afterwards may do
169 silly things.
170
171 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
172 one (it's much easier than Tom thought :-).
173
174 (5) Because of (4), we can now allow for the use of $prvscheck_result
175 inside the third argument.
cb9328de 176
cb741023
PH
177PH/03 For some reason, the default setting of PATH when running a command from
178 a pipe transport was just "/usr/bin". I have changed it to
179 "/bin:/usr/bin".
180
f174f16e
PH
181PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
182 anything to be listed in the output from -bV.
b2f5a032 183
c25242d7
PH
184PH/05 When a filter generated an autoreply, the entire To: header line was
185 quoted in the delivery log line, like this:
186
187 => >A.N.Other <ano@some.domain> <original@ddress> ...
188
189 This has been changed so that it extracts the operative address. There
190 may be more than one such address. If so, they are comma-separated, like
191 this:
192
193 => >ano@some.domain,ona@other.domain <original@ddress> ...
194
82c19f95
PH
195PH/06 When a client host used a correct literal IP address in a HELO or EHLO
196 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
197 not being looked up in the rDNS to get a host name, Exim was showing the
198 IP address twice in Received: lines, even though the IP addresses were
199 identical. For example:
200
201 Received: from [1.2.3.4] (helo=[1.2.3.4])
202
203 However, if the real host name was known, it was omitting the HELO data
204 if it matched the actual IP address. This has been tidied up so that it
205 doesn't show the same IP address twice.
206
d7ffbc12
PH
207PH/07 When both +timestamp and +memory debugging was on, the value given by
208 $tod_xxx expansions could be wrong, because the tod_stamp() function was
209 called by the debug printing, thereby overwriting the timestamp buffer.
210 Debugging no longer uses the tod_stamp() function when +timestamp is set.
211
9f526266
PH
212PH/08 When the original message was included in an autoreply transport, it
213 always said "this is a copy of the message, including all the headers",
214 even if body_only or headers_only was set. It now gives an appropriate
215 message.
216
87fcc8b9
PH
217PH/09 Applied a patch from the Sieve maintainer which:
218
219 o fixes some comments
220 o adds the (disabled) notify extension core
221 o adds some debug output for the result of if/elsif tests
222 o points to the current vacation draft in the documentation
223 and documents the missing references header update
224
225 and most important:
226
227 o fixes a bug in processing the envelope test (when testing
228 multiple envelope elements, the last element determinted the
229 result)
230
456682f5
PH
231PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
232 Electronic Mail") by including:
233
234 Auto-submitted: auto-generated
235
236 in the messages that it generates (bounce messages and others, such as
237 warnings). In the case of bounce messages for non-SMTP mesages, there was
238 also a typo: it was using "Auto_submitted" (underscore instead of
239 hyphen). Since every message generated by Exim is necessarily in response
240 to another message, thes have all been changed to:
241
242 Auto-Submitted: auto-replied
243
244 in accordance with these statements in the RFC:
245
246 The auto-replied keyword:
247
248 - SHOULD be used on messages sent in direct response to another
249 message by an automatic process,
250
251 - MUST NOT be used on manually-generated messages,
252
253 - MAY be used on Delivery Status Notifications (DSNs) and Message
254 Disposition Notifications (MDNs),
255
256 - MUST NOT be used on messages generated by automatic or periodic
257 processes, except for messages which are automatic responses to
258 other messages.
259
3e46c1aa
PH
260PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
261 to the default Received: header definition.
456682f5 262
49826d12
PH
263PH/12 Added log selector acl_warn_skipped (default on).
264
eba0c039
PH
265PH/13 After a successful wildlsearch lookup, discard the values of numeric
266 variables because (a) they are in the wrong storage pool and (b) even if
267 they were copied, it wouldn't work properly because of the caching.
268
a0d6ba8a
PH
269PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
270 checking when decoding. Apparently there are clients that generate
271 overlong encoded strings. Why am I not surprised?
272
f0917727
PH
273PH/15 If the first argument of "${if match_address" was not empty, but did not
274 contain an "@" character, Exim crashed. Now it writes a panic log message
275 and treats the condition as false.
276
096fee00
PH
277PH/16 In autoreply, treat an empty string for "once" the same as unset.
278
024bd3c2
PH
279PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
280 extension "envelope-auth". The code is finished and in agreement with
281 other implementations, but there is no documentation so far and in fact,
282 nobody wrote the draft yet. This extension is currently #undef'ed, thus
283 not changing the active code.
284
285 Print executed "if" and "elsif" statements when debugging is used. This
286 helps a great deal to understand what a filter does.
287
288 Document more things not specified clearly in RFC3028. I had all this
289 sorted out, when out of a sudden new issues came to my mind. Oops."
290
df199fec
PH
291PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
292 (Bugzilla #53).
293
d27f1df3
PH
294PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
295 canonical form (as documented). However, after a host name lookup from
296 the IP address, check_host() was doing a simple string comparison with
297 addresses acquired from the DNS when checking that the found name did
298 have the original IP as one of its addresses. Since any found IPv6
299 addresses are likely to be in abbreviated form, the comparison could
300 fail. Luckily, there already exists a function for doing the comparison
301 by converting both addresses to binary, so now that is used instead of
302 the text comparison.
303
96776534
PH
304PH/20 There was another similar case to PH/19, when a complete host name was
305 given in a host list; looking up its IP address could give an abbreviated
306 form, whereas the current host's name might or might not be abbreviated.
307 The same fix has been applied.
308
5de37277 309
9a799bc0
PH
310Exim version 4.54
311-----------------
312
313PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
314 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
315 It now does.
316
99a4b039
PH
317PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
318 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
319
320PH/03 Typo: missing ".o" in src/pcre/Makefile.
321
4b233853
PH
322PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
323 header line, restrict the check to what is listed in RFCs 2369 and 2929.
324 Also, for "Auto-Submitted", treat anything other than "no" as
325 non-personal, in accordance with RFC 3834. (Previously it treated
326 anything starting "auto-" as non-personal.)
327
8857ccfd
PH
328TF/01 The control=submission/name=... option had a problem with syntax
329 errors if the name included a slash character. The /name= option
330 now slurps the rest of the string, so it can include any characters
331 but it must come last in the list of options (after /sender_retain
332 or /domain=).
333
433a2980
PH
334PH/05 Some modifications to the interface to the fake nameserver for the new
335 testing suite.
336
3e46c1aa 337
9a799bc0 338
e3a311ba
TK
339Exim version 4.53
340-----------------
341
342TK/01 Added the "success_on_redirect" address verification option. See
343 NewStuff for rationale and an example.
344
13b685f9
PH
345PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
346
395ff96d
PH
347PH/02 Patch to exigrep to allow it to work on syslog lines.
348
5b68f6e4
PH
349PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
350 fread() to skip over the body file's header line, because in Cygwin the
351 header line is locked and is inaccessible.
352
1ab52c69
PH
353PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
354 co-exist for some time) to make it clear that it is the Exim ID that is
355 referenced, not the Message-ID: header line.
356
b07e6aa3
PH
357PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
358 string_format() function, because snprintf() does not exist on all
359 operating systems.
360
254e032f
PH
361PH/06 The use of forbid_filter_existstest now also locks out the use of the
362 ${stat: expansion item.
363
3af76a81
PH
364PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
365 protocol synchronization error", to keep the pedants happy.
366
2548ba04
PH
367PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
368 well as for IRIX systems, when gcc is being used. See the host.c source
369 file for comments.
370
b6c6011d
PH
371PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
372
cf39cf57
PH
373PH/10 Named domain lists were not working if used in a queue_smtp_domains
374 setting.
375
f1513293
PH
376PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
377 transport and to the smtp transport in LMTP mode.
378
727549a4
PH
379TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
380
af46795e
PH
381PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
382 run a filter in a subprocess. This could lead to confusion in subsequent
383 lookups in the parent process. There should also be a search_tidyup() at
384 the end of the subprocess.
385
d7b47fd0
PH
386PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
387 only if the host matched helo_try_verify_hosts, which caused the
388 verification to occur when the EHLO/HELO command was issued. The ACL just
389 tested the remembered result. Now, if a previous verification attempt has
390 not happened, "verify = helo" does it there and then.
391
ee744174
JJ
392JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
393
b582ab87
PH
394TK/03 Fix log output including CR from clamd.
395
41a13e0a
PH
396PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
397 exist provoked a memory error which could cause a segfault.
398
f625cc5a
PH
399PH/15 Installed PCRE 6.2
400
401PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
402
21f7af35
PH
403PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
404 of the problem. Specifically, suggested +O2 rather than +O1 for the
405 HP-UX compiler.
406
31480e42
PH
407PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
408
2d280592
PH
409PH/20 If a delivery was routed to a non-standard port by means of an SRV
410 record, the port was not correctly logged when the outgoing_port log
411 selector was set (it logged the transort's default port).
412
7cd1141b
PH
413PH/21 Added support for host-specific ports to manualroute, queryprogram,
414 fallback_hosts, and "hosts" in the smtp transport.
415
416PH/22 If the log selector "outgoing_port" is set, the port is now also given on
417 host errors such as "Connection refused".
418
750af86e
PH
419PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
420 authentication with radiusclient 0.4.9:
421
422 - Error returned from rc_read_config was caught wrongly
423 - Username/password not passed on to radius server due to wrong length.
424
425 The presumption is that some radiusclient API changes for 4.51/PH/17
426 were not taken care of correctly. The code is still untested by me (my
427 Linux distribution still has 0.3.2 of radiusclient), but it was
428 contributed by a Radius user.
429
430PH/24 When doing a callout, the value of $domain wasn't set correctly when
431 expanding the "port" option of the smtp transport.
432
4304270b
TK
433TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
434 while reading a MIME header. Thanks to Tom Hughes for a patch.
435
750af86e
PH
436PH/24 Include config.h inside local_scan.h so that configuration settings are
437 available.
438
64ffc24f
PH
439PH/25 Make $smtp_command_argument available after all SMTP commands. This means
440 that in an ACL for RCPT (for example), you can examine exactly what was
441 received.
442
5dd9625b
PH
443PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
444 commands, but it was not correctly comparing the address with the actual
445 client host address. Thus, it would show the EHLO address in Received:
446 header lines when this was not necessary.
447
5591031b
PH
448PH/27 Added the % operator to ${eval:}.
449
ba18e66a
PH
450PH/28 Exim tries to create and chdir to its spool directory when it starts;
451 it should be ignoring failures (because with -C, for example, it has lost
452 privilege). It wasn't ignoring creation failures other than "already
453 exists".
454
9cec981f
PH
455PH/29 Added "crypteq" to the list of supported features that Exim outputs when
456 -bV or -d is used.
457
aa2b5c79
PH
458PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
459 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
460 too many continuations, the temporary file was not being removed, and the
461 return code was incorrect.
aa2b5c79 462
48a53b7f
PH
463PH/31 Missing "BOOL" in function definition in filtertest.c.
464
1c59d63b
PH
465PH/32 Applied Sieve patches from the maintainer.
466
671012da
TK
467TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
468
1509d3a8
PH
469PH/33 Added "verify = not_blind".
470
471PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
472 Local/Makefile (with some defaults set). These are used in built scripts
473 such as exicyclog, but they have never been used in the exim_install
474 script (though there are many overriding facilities there). I have
475 arranged that the exim_install script now takes note of these two
476 settings.
477
478PH/35 Installed configuration files for Dragonfly.
479
2fe1a124
PH
480PH/36 When a locally submitted message by a trusted user did not contain a
481 From: header, and the sender address was obtained from -f or from an SMTP
482 MAIL command, and the trusted user did not use -F to supply a sender
483 name, $originator_name was incorrectly used when constructing a From:
484 header. Furthermore, $originator_name was used for submission mode
485 messages from external hosts without From: headers in a similar way,
486 which is clearly wrong.
487
8800895a
PH
488PH/37 Added control=suppress_local_fixups.
489
ccfdb010
PH
490PH/38 When log_selector = +received_sender was set, and the addition of the
491 sender made the log line's construction buffer exactly full, or one byte
492 less than full, an overflow happened when the terminating "\n" was
493 subsequently added.
494
1130bfb0
PH
495PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
496 when the result of a list match is failure because a DNS lookup failed.
497
ebcb507f
PH
498PH/40 RM_COMMAND is now used in the building process.
499
c35e155c
PH
500PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
501 the "build-* directories that it finds.
502
95d1f782
PH
503PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
504 address in a domain literal was a prefix of an interface address.
505
fd6de02e
PH
506PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
507 when verifying a sender address, unless rewrite_headers is false.
508
58de37c5
PH
509PH/44 Wrote a long comment about why errors_to addresses are verified as
510 recipients, not senders.
511
261cf466
TF
512TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
513 the ratelimit ACL was added.
514
3ee512ff
PH
515PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
516
e08c430f
PH
517PH/46 Added extra information about PostgreSQL errors to the error string.
518
bef5a11f
PH
519PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
520 avoiding the need to install special zones in a real server. This is
521 backwards compatible; if it can't find the fake resolver, it drops back.
522 Thus, both old and new test suites can be run.
523
7546de58
TF
524TF/02 Added util/ratelimit.pl
525
e5d5a95f
TF
526TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
527 clock is set back in time.
528
2e88a017
TF
529TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
530 Candler <B.Candler@pobox.com>.
531
a5f65aa4
TF
532TF/05 The fix for PH/43 was not completely correct; widen_domains is always
533 OK for addresses that are the result of redirections.
534
e7726cbf
PH
535PH/48 A number of further additions for the benefit of the new test suite,
536 including a fake gethostbyname() that interfaces to the fake DNS resolver
537 (see PH/47 above).
538
a7fdad5b
TF
539TF/06 The fix for widen_domains has also been applied to qualify_single and
540 search_parents which are the other dnslookup options that can cause
541 header rewrites.
542
6af56900
PH
543PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
544 type ("H").
545
0925ede6
PH
546PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
547
66afa403
TF
548TF/07 Exim produced the error message "an SRV record indicated no SMTP
549 service" if it encountered an MX record with an empty target hostname.
550 The message is now "an MX or SRV record indicated no SMTP service".
551
0154e85a
TF
552TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
553 if the DNS of the sending site is misconfigured. This is quite a
554 common situation. This change restores the behaviour of treating a
555 helo verification defer as a failure.
556
16f12c76
PH
557PH/51 If self=fail was set on a router, the bounce message did not include the
558 actual error message.
559
bbe902f0 560
e5a9dba6
PH
561Exim version 4.52
562-----------------
563
564TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
565
22c3b60b
PH
566PH/01 When a transport filter timed out in a pipe delivery, and the pipe
567 command itself ended in error, the underlying message about the transport
568 filter timeout was being overwritten with the pipe command error. Now the
569 underlying error message should be appended to the second error message.
570
06a9b4b5
PH
571TK/01 Fix poll() being unavailable on Mac OSX 10.2.
572
c1ac6996
PH
573PH/02 Reduce the amount of output that "make" produces by default. Full output
574 can still be requested.
575
9c7a242c
PH
576PH/03 The warning log line about a condition test deferring for a "warn" verb
577 was being output only once per connection, rather than after each
578 occurrence (because it was using the same function as for successful
579 "warn" verbs). This seems wrong, so I have changed it.
580
87ba3f5f
PH
581TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
582 it should not have, which might have caused a crash in the right
583 circumstances, but probably never did.
584
585PH/04 Installed a modified version of Tony Finch's patch to make submission
586 mode fix the return path as well as the Sender: header line, and to
587 add a /name= option so that you can make the user's friendly name appear
588 in the header line.
589
29aba418
TF
590TF/03 Added the control = fakedefer ACL modifier.
591
fe0dab11
TF
592TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
593 Mark Lowes for thorough testing.
870f6ba8 594
11d337a4
TK
595TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
596
597TK/03 Merged latest SRS patch from Miles Wilton.
598
415c8f3b
PH
599PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
600 with the definition in sysexits.h (which is #included earlier).
601 Fortunately, Exim does not actually use EX_OK. The code used to try to
602 preserve the sysexits.h value, by assumimg that macro definitions were
603 scanned for macro replacements. I have been disabused of this notion,
604 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 605
958541e9
PH
606PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
607 in the smtp transport. When a block could not be written in a single
608 write() function, the timeout was being re-applied to each part-write.
609 This seems wrong - if the receiver was accepting one byte at a time it
610 would take for ever. The timeout is now adjusted when this happens. It
611 doesn't have to be particularly precise.
612
c206415f
TK
613TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
614 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
615
2a4be8f9
PH
616PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
617 without a domain if the check to <postmaster@domain> fails.
618
1cba11c5
SC
619SC/01 Eximstats: added -xls and the ability to specify output files
620 (patch written by Frank Heydlauf).
621
622SC/02 Eximstats: use FileHandles for outputing results.
623
624SC/03 Eximstats: allow any combination of xls, txt, and html output.
625
626SC/04 Eximstats: fixed display of large numbers with -nvr option
627
628SC/05 Eximstats: fixed merging of reports with empty tables.
629
630SC/06 Eximstats: added the -include_original_destination flag
631
632SC/07 Eximstats: removed tabs and trailing whitespace.
633
1005d00e
TK
634TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
635
636TK/06 MBOX spool code: Add real "From " MBOX separator line
637 so the .eml file is really in mbox format (even though
638 most programs do not really care). Patch from Alex Miller.
639
640TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
641 The latter is generated from $received_to and is only set if the
642 message has one envelope recipient. SA can use these headers,
643 obviously out-of-the-box. Patch from Alex Miller.
644
9b4768fa
PH
645PH/08 The ${def test on a variable was returning false if the variable's
646 value was "0", contrary to what the specification has always said!
647 The result should be true unless the variable is empty.
648
649PH/09 The syntax error of a character other than { following "${if
650 def:variable_name" (after optional whitespace) was not being diagnosed.
651 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
652 accidental colon was present, for example, could give incorrect results.
653
0d7eb84a
PH
654PH/10 Tidied the code in a number of places where the st_size field of a stat()
655 result is used (not including appendfile, where other changes are about
656 to be made).
657
658PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
659 This involved changing a lot of size variables from int to off_t. It
660 should work with maildirs and everything.
661
40727bee
TK
662TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
663 spamd dying while we are connected to it.
664
554d2369
TF
665TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
666 <jgh@wizmail.org>
667
1f922db1
PH
668PH/12 Applied Alex Kiernan's patch for the API change for the error callback
669 function for BDB 4.3.
670
ef213c3b
PH
671PH/13 Changed auto_thaw such that it does not apply to bounce messages.
672
8ac170f3
PH
673PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
674 the sources for PCRE have been re-arranged and more files are now
675 involved.
676
b1c749bb
PH
677PH/15 The code I had for printing potentially long long variables in PH/11
678 above was not the best (it lost precision). The length of off_t variables
679 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
680 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
681 to be "long long int" or "long int". This is needed for the internal
682 formatting function string_vformat().
b1c749bb 683
4aac9b49
PH
684PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
685 the configuration file to be ":syslog", then the script "guesses" where
686 the logs files are, rather than using the compiled in default. In our
687 case the guess is not the same as the compiled default, so the script
688 suddenly stopped working when I started to use syslog. The patch checks
689 to see if log_file_path is "". If so, it attempts to read it from exim
690 with no configuration file to get the compiled in version, before it
691 falls back to the previous guessing code."
692
294520c8
TK
693TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
694 implementing BATV in an Exim configuration. See NewStuff for the gory
695 details.
696
5bd022fe
PH
697PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
698 Makefile that are specific to HP-UX.
699
90e9ce59
PH
700PH/18 If the "use_postmaster" option was set for a recipient callout together
701 with the "random" option, the postmaster address was used as the MAIL
702 FROM address for the random test, but not for the subsequent recipient
703 test. It is now used for both.
704
5ea81592
PH
705PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
706 patch removes a few documentation additions to RFC 3028, because the
707 latest draft now contains them. It adds the new en;ascii-case comparator
708 and a new error check for 8bit text in MIME parts. Comparator and
709 require names are now matched exactly. I enabled the subaddress
710 extension, but it is not well tested yet (read: it works for me)."
711
c6c2dc1d
PH
712PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
713 rework some of the code of TK/09 above to avoid the hardwired use of
714 "%lld" and "long long". Replaced the call to snprintf() with a call to
715 string_vformat().
716
fffffe4c
PH
717PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
718 records point to non-existent hosts", "retry timeout exceeded", and
719 "retry time not reached for any host after a long failure period".
ca02eafb 720
9a26b6b2
PH
721PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
722 experimental DomainKeys support:
723
724 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
725 (2) On an error such as an illegally used "control", the wrong name for
726 the control was given.
727
728 These problems did NOT occur unless DomainKeys support was compiled.
729
4aee0225
PH
730PH/23 Added daemon_startup_retries and daemon_startup_sleep.
731
32d668a5
PH
732PH/24 Added ${if match_ip condition.
733
8187c3f3
PH
734PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
735 databases so that it will be absolutely obvious if a crash occurs in the
736 DB library. This is a regular occurrence (often caused by mis-matched
737 db.h files).
738
ff790e47 739PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
740 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
741 picked up on a user's system that detects such things. There doesn't seem
742 to be a gcc warning option for this - only an attribute that has to be
743 put on the function's prototype. It seems that in Fedora Core 4 they have
744 set this on a number of new functions. No doubt there will be more in due
745 course.
ff790e47 746
5417f6d1
PH
747PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
748 specify a transport. However, if an address that was verified by such a
749 router was the subject of a callout, Exim crashed because it tried to
750 read the rcpt_include_affixes from the non-existent transport. Now it
751 just assumes that the setting of that option is false. This bug was
752 introduced by 4.51/PH/31.
753
59cf8544
PH
754PH/28 Changed -d+all to exclude +memory, because that information is very
755 rarely of interest, but it makes the output a lot bigger. People tend to
756 do -d+all out of habit.
757
e7ad8a65
PH
758PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
759 code in os-type was giving problems when libc.so lives in lib64, like on
760 x86_64 Fedora Core.
761
ade42478
PH
762PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
763 aren't the modern standard, and it seems that some systems' include files
764 don't always have them. Exim was already checking for some of the newer
765 ones like T_AAAA, and defining it itself. I've added checks for all the
766 record types that Exim uses.
767
182ad5cf
PH
768PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
769 not automatically generating a new one, as it is supposed to. This
770 prevented TLS from working. If the file did exist, but contained invalid
771 data, a new version was generated, as expected. It was only the case of a
772 non-existent file that was broken.
773
b0d9fc80
TK
774TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
775 with a change in libdomainkeys > 0.64.
776
777TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
778 from DNS. If the selector record carries the flag, it now has
779 precedence over the domain-wide flag.
780
781TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
782
47c7a64a
PH
783PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
784 the use of a port name that isn't defined in /etc/services) occurred, the
785 message was deferred as in a normal delivery, and thus remained on the
786 spool, instead of being failed because of the mua_wrapper setting. This
787 is now fixed, and I tidied up some of the mua_wrapper messages at the
788 same time.
789
a388bce4
SC
790SC/08 Eximstats: whilst parsing the mainlog(s), store information about
791 the messages in a hash of arrays rather than using individual hashes.
792 This is a bit cleaner and results in dramatic memory savings, albeit
793 at a slight CPU cost.
794
795SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
796 as requested by Marc Sherman.
797
798SC/10 Eximstats: added histograms for user specified patterns as requested
799 by Marc Sherman.
800
0793e4ed
SC
801SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
802
c58b88df
PH
803PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
804 fopen() in the content-scanning modules that did not already have it.
805
e7ad8a65 806
7982096b
PH
807Exim version 4.51
808-----------------
809
1a46a8c5
PH
810TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
811 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
812
2f079f46 813TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
814
815TK/03 Fix ACL "regex" condition not being available in MIME ACL.
816
817PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
818 to test Sieve filters that use "vacation".
819
820PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
821 that changes the way the GnuTLS parameters are stored in the cache file.
822 The new format can be generated externally. For backward compatibility,
823 if the data in the cache doesn't make sense, Exim assumes it has read an
824 old-format file, and it generates new data and writes a new file. This
825 means that you can't go back to an older release without removing the
826 file.
827
828PH/03 A redirect router that has both "unseen" and "one_time" set does not
829 work if there are any delivery delays because "one_time" forces the
830 parent to be marked "delivered", so its unseen clone is never tried
831 again. For this reason, Exim now forbids the simultaneous setting of
832 these two options.
833
834PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
835 redirected to themselves ("homonym" addresses). Read the long ChangeLog
836 entry if you want to know the details. The fix, however, neglected to
837 consider the case when local delivery batching is involved. The test for
838 "previously delivered" was not happening when checking to see if an
839 address could be batched with a previous (undelivered) one; under
840 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 841 address.
1a46a8c5
PH
842
843PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
844 in its include files, and this causes problems building Exim.
845
846PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
847 header_syntax) but Exim was just ignoring anything given after a slash.
848 In particular, this caused confusion with an attempt to use "verify =
849 reverse_host_lookup/defer_ok". An error is now given when options are
850 supplied for verify items that do not have them. (Maybe reverse_host_
851 lookup should have a defer_ok option, but that's a different point.)
852
853PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
854 defined by RFC 821) to 2048, because there were problems with some AUTH
855 commands, and RFC 1869 says the size should be increased for extended
856 SMTP commands that take arguments.
857
858PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
859 Finch).
860
861PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
862 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 863
49c2d5ea
PH
864PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
865 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
866 whatever). Otherwise the password may appear in the log. Following change
867 PH/42 below, there is no longer a chance of it appearing in a bounce
868 message.
49c2d5ea 869
bf759a8b
PH
870PH/11 Installed exipick version 20050225.0 from John Jetmore.
871
83364d30
PH
872PH/12 If the last host in a fallback_hosts list was multihomed, only the first
873 of its addresses was ever tried. (Bugzilla bug #2.)
874
7999bbd7
PH
875PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
876 the result incorrectly in the debug output. (It correctly added a newline
877 to what was transported.)
878
7dbf77c9
PH
879TF/01 Added $received_time.
880
74e0617f
PH
881PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
882 commented out examples of how to interface to a virus scanner and to
883 SpamAssassin. Also added commented examples of av_scanner and
884 spamd_address settings.
885
2f079f46
PH
886PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
887 and controls are allowed in which ACLs. There were a couple of minor
888 errors. Some of the entries in the conditions table (which is a table of
889 where they are NOT allowed) were getting very unwieldy; rewrote them as a
890 negation of where the condition IS allowed.
891
8c841523
PH
892PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
893
7766a4f0
PH
894PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
895 header file does not have a version number, so I've had to invent a new
896 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
897 API. The code is untested by me (my Linux distribution still has 0.3.2 of
898 radiusclient), but it was contributed by a Radius user.
899
8b417f2c
PH
900PH/18 Installed Lars Mainka's patch for the support of CRL collections in
901 files or directories, for OpenSSL.
902
901f42cb
PH
903PH/19 When an Exim process that is running as root has to create an Exim log
904 file, it does so in a subprocess that runs as exim:exim so as to get the
905 ownership right at creation (otherwise, other Exim processes might see
906 the file with the wrong ownership). There was no test for failure of this
907 fork() call, which would lead to the process getting stuck as it waited
908 for a non-existent subprocess. Forks do occasionally fail when resources
909 run out. I reviewed all the other calls to fork(); they all seem to check
910 for failure.
911
f9b9210e
PH
912PH/20 When checking for unexpected SMTP input at connect time (before writing
913 the banner), Exim was not dealing correctly with a non-positive return
914 from the read() function. If the client had disconnected by this time,
915 the result was a log entry for a synchronization error with an empty
916 string after "input=" when read() returned zero. If read() returned -1
917 (an event I could not check), uninitialized data bytes were printed.
918 There were reports of junk text (parts of files, etc) appearing after
919 "input=".
920
54cdb463
PH
921PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
922
cf00dad6
PH
923PH/22 Added support for macro redefinition, and (re)definition in between
924 driver and ACL definitions.
925
acb1b346
PH
926PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
927 forgetting to use the resulting value; it was using the unexpanded value.
928
c5ddb310
PH
929PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
930 hadn't been configured. The fix is from Juergen Kreileder, who
931 understands it better than I do:
932
933 "Here's what I see happening with three configured cyrus_sasl
934 authenticators configured (plain, login, cram-md5):
935
936 On startup auth_cyrus_sasl_init() gets called for each of these.
937 This means three calls to sasl_listmech() without a specified mech_list.
938 => SASL tests which mechs of all available mechs actually work
939 => three warnings about OTP not working
940 => the returned list contains: plain, login, cram-md5, digest-md5, ...
941
942 With the patch, sasl_listmech() also gets called three times. But now
943 SASL's mech_list option is set to the server_mech specified in the the
944 authenticator. Or in other words, the answer from sasl_listmech()
945 gets limited to just the mech you're testing for (which is different
946 for each call.)
947 => the return list contains just 'plain' or 'login', 'cram-md5' or
948 nothing depending on the value of ob->server_mech.
949
950 I've just tested the patch: Authentication still works fine,
951 unavailable mechs specified in the exim configuration are still
952 caught, and the auth.log warnings about OTP are gone."
953
31619da6
PH
954PH/25 When debugging is enabled, the contents of the command line are added
955 to the debugging output, even when log_selector=+arguments is not
956 specified.
957
bebaf0fc
PH
958PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
959 answer is "GNU", and only if the return is "GNU/something" is the answer
960 "Linux".
961
475fe28a
PH
962PH/27 $acl_verify_message is now set immediately after the failure of a
963 verification in an ACL, and so is available in subsequent modifiers. In
964 particular, the message can be preserved by coding like this:
965
966 warn !verify = sender
967 set acl_m0 = $acl_verify_message
968
969 Previously, $acl_verify_message was set only while expanding "message"
970 and "log_message" when a very denied access.
971
7e8bec7a
PH
972PH/28 Modified OS/os.c-Linux with
973
974 -#ifndef OS_LOAD_AVERAGE
975 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
976
977 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
978 nomenclature these days.)
979
e4a89c47
PH
980PH/29 Installed patch from the Sieve maintainer that adds the options
981 sieve_useraddress and sieve_subaddress to the redirect router.
982
5ca2a9a1
PH
983PH/30 In these circumstances:
984 . Two addresses routed to the same list of hosts;
985 . First host does not offer TLS;
986 . First host accepts first address;
987 . First host gives temporary error to second address;
988 . Second host offers TLS and a TLS session is established;
989 . Second host accepts second address.
990 Exim incorrectly logged both deliveries with the TLS parameters (cipher
991 and peerdn, if requested) that were in fact used only for the second
992 address.
7e8bec7a 993
c688b954
PH
994PH/31 When doing a callout as part of verifying an address, Exim was not paying
995 attention to any local part prefix or suffix that was matched by the
996 router that accepted the address. It now behaves in the same way as it
997 does for delivery: the affixes are removed from the local part unless
998 rcpt_include_affixes is set on the transport.
999
fed77020
PH
1000PH/32 Add the sender address, as F=<...>, to the log line when logging a
1001 timeout during the DATA phase of an incoming message.
1002
7fe1560f
PH
1003PH/33 Sieve envelope tests were broken for match types other than :is. I have
1004 applied a patch sanctioned by the Sieve maintainer.
c688b954 1005
ebb6e6d5
PH
1006PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1007 the uid or gid is negative. A case of a negative gid caused this to be
1008 noticed. The fix allows for either to be negative.
1009
9c4e8f60
PH
1010PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1011 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1012 overlooked.
1013
1014PH/36 The change PH/12 above was broken. Fixed it.
1015
d7174846
PH
1016PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1017 the grounds that routing the same address twice would always produce the
1018 same answer. This might have been true once, but it is certainly no
1019 longer true now. Routing a child address may depend on the previous
1020 routing that produced that child. Some complicated redirection strategies
1021 went wrong when messages had multiple recipients, and made Exim's
1022 behaviour dependent on the order in which the addresses were given.
1023
1024 I have moved the duplicate checking until after the routing is complete.
1025 Exim scans the addresses that are assigned to local and remote
1026 transports, and removes any duplicates. This means that more work will be
1027 done, as duplicates will always all be routed, but duplicates are
1028 presumably rare, so I don't expect this is of any significance.
1029
1030 For deliveries to pipes, files, and autoreplies, the duplicate checking
1031 still happens during the routing process, since they are not going to be
1032 routed further.
1033
cfe75fc3
PH
1034PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1035 It corrects a timeout issue with spamd. This is Ian's comment: "The
1036 background is that sometimes spamd either never reads data from a
1037 connection it has accepted, or it never writes response data. The exiscan
1038 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1039 blindly assumes that writes won't block so it may never time out."
1040
be22d70e
PH
1041PH/39 Allow G after quota size as well as K and M.
1042
0612b098
PH
1043PH/40 The value set for $authenticated_id in an authenticator may not contain
1044 binary zeroes or newlines because the value is written to log lines and
1045 to spool files. There was no check on this. Now the value is run through
1046 the string_printing() function so that such characters are converted to
1047 printable escape sequences.
1048
2e0c1448
PH
1049PH/41 $message_linecount is a new variable that contains the total number of
1050 lines in the message. Compare $body_linecount, which is the count for the
1051 body only.
1052
447d236c
PH
1053PH/42 Exim no longer gives details of delivery errors for specific addresses in
1054 bounce and delay warning messages, except in certain special cases, which
1055 are as follows:
1056
1057 (a) An SMTP error message from a remote host;
1058 (b) A message specified in a :fail: redirection;
1059 (c) A message specified in a "fail" command in a system filter;
1060 (d) A message specified in a FAIL return from the queryprogram router;
1061 (e) A message specified by the cannot_route_message router option.
1062
1063 In these cases only, Exim does include the error details in bounce and
1064 warning messages. There are also a few cases where bland messages such
1065 as "unrouteable address" or "local delivery error" are given.
1066
d20976dc
PH
1067PH/43 $value is now also set for the "else" part of a ${run expansion.
1068
f656d135
PH
1069PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1070 being worked on, but at least Exim now implements the latest version to
1071 play with."
1072
2e2a30b4
PH
1073PH/45 In a pipe transport, although a timeout while waiting for the pipe
1074 process to complete was treated as a delivery failure, a timeout while
1075 writing the message to the pipe was logged, but erroneously treated as a
1076 successful delivery. Such timeouts include transport filter timeouts. For
1077 consistency with the overall process timeout, these timeouts are now
1078 treated as errors, giving rise to delivery failures by default. However,
1079 there is now a new Boolean option for the pipe transport called
1080 timeout_defer, which, if set TRUE, converts the failures into defers for
1081 both kinds of timeout. A transport filter timeout is now identified in
1082 the log output.
1083
9176e9f0
PH
1084PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1085 systems where "make" and "gmake" are different, calling "gmake" at top
1086 level broke things. I've arranged for the value of $(MAKE) to be passed
1087 from the Makefile to this script so that it can call the same version of
1088 "make".
1089
7982096b 1090
bbe902f0
PH
1091A note about Exim versions 4.44 and 4.50
1092----------------------------------------
1093
1094Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1095changes of various kinds. As a consequence, a big documentation update was
1096needed. This delayed the release for rather longer than seemed good, especially
1097in the light of a couple of (minor) security issues. Therefore, the changes
1098that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1099release. So 4.44 and 4.50 are in effect two different branches that both start
1100from 4.43.
1101
1102I have left the 4.50 change log unchanged; it contains all the changes since
11034.43. The change log for 4.44 is below; many of its items are identical to
1104those for 4.50. This seems to be the most sensible way to preserve the
1105historical information.
1106
1107
f7b63901 1108Exim version 4.50
495ae4b0
PH
1109-----------------
1110
5fe762f6
PH
1111 1. Minor wording change to the doc/README.SIEVE file.
1112
139059f6 1113 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1114 computation of the current number of files was incorrect.
495ae4b0 1115
7086e875
PH
1116 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1117 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1118 place.
1119
35af9f61
PH
1120 4. Give more explanation in the error message when the command for a transport
1121 filter fails to execute.
1122
b668c215
PH
1123 5. There are several places where Exim runs a non-Exim command in a
1124 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1125 was being done only for the command run by the queryprogram router. It is
1126 now done for all such subprocesses. The other cases are: ${run, transport
1127 filters, and the commands run by the lmtp and pipe transports.
1128
a494b1e1
PH
1129 6. Added CONFIGURE_GROUP build-time option.
1130
1131 7. Some older OS have a limit of 256 on the maximum number of file
1132 descriptors. Exim was using setrlimit() to set 1000 as a large value
1133 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1134 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1135
c5fcb476
PH
1136 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1137 was an oversight, and furthermore, ever since the addition of extra
1138 controls (e.g. 4.43/32), the checks on when to allow different forms of
1139 "control" were broken. There should now be diagnostics for all cases when a
1140 control that does not make sense is encountered.
1141
69358f02
PH
1142 9. Added the /retain_sender option to "control=submission".
1143
5be20824
PH
114410. $recipients is now available in the predata ACL (oversight).
1145
eb2c0248
PH
114611. Tidy the search cache before the fork to do a delivery from a message
1147 received from the command line. Otherwise the child will trigger a lookup
1148 failure and thereby defer the delivery if it tries to use (for example) a
1149 cached ldap connection that the parent has called unbind on.
1150
2a3eea10
PH
115112. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1152 of $address_data from the recipient verification was clobbered by the
1153 sender verification.
1154
115513. The value of address_data from a sender verification is now available in
1156 $sender_address_data in subsequent conditions in the ACL statement.
1157
23c7ff99
PH
115814. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1159
4deaf07d
PH
116015. Added a new option "connect=<time>" to callout options, to set a different
1161 connection timeout.
1162
926e1192
PH
116316. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1164 was its contents. (It was OK if the option was not defined at all.)
1165
650edc6f
PH
116617. A "Completed" log line is now written for messages that are removed from
1167 the spool by the -Mrm option.
1168
2c7db3f5
PH
116918. New variables $sender_verify_failure and $recipient_verify_failure contain
1170 information about exactly what failed.
1171
3d235903
PH
117219. Added -dd to debug only the daemon process.
1173
7c7ad977
PH
117420. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1175 handles timeouts, both on the server side and network timeouts. Renamed the
1176 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1177
981756db
PH
117821. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1179 It is now set to "smtps".
1180
d4eb88df
PH
118122. $host_address is now set to the target address during the checking of
1182 ignore_target_hosts.
1183
118423. When checking ignore_target_hosts for an ipliteral router, no host name was
1185 being passed; this would have caused $sender_host_name to have been used if
1186 matching the list had actually called for a host name (not very likely,
1187 since this list is usually IP addresses). A host name is now passed as
1188 "[x.x.x.x]".
1189
7d468ab8
PH
119024. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1191 code that specifies a non-restarting handler (typically sigaction() in
1192 modern systems) in an attempt to fix a rare and obscure crash bug.
1193
119425. Narrowed the window for a race in the daemon that could cause it to ignore
1195 SIGCHLD signals. This is not a major problem, because they are used only to
1196 wake it up if nothing else does.
1197
62c0818f
PH
119826. A malformed maildirsize file could cause Exim to calculate negative values
1199 for the mailbox size or file count. Odd effects could occur as a result.
1200 The maildirsize information is now recalculated if the size or filecount
1201 end up negative.
1202
26034054
PH
120327. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1204 support for a long time. Removed HAVE_SYS_VFS_H.
1205
af66f652
PH
120628. Installed the latest version of exipick from John Jetmore.
1207
90af77f4
PH
120829. In an address list, if the pattern was not a regular expression, an empty
1209 subject address (from a bounce message) matched only if the pattern was an
1210 empty string. Non-empty patterns were not even tested. This was the wrong
1211 because it is perfectly reasonable to use an empty address as part of a
1212 database query. An empty address is now tested by patterns that are
1213 lookups. However, all the other forms of pattern expect the subject to
1214 contain a local part and a domain, and therefore, for them, an empty
1215 address still always fails if the pattern is not itself empty.
1216
d8ef3577
PH
121730. Exim went into a mad DNS loop when attempting to do a callout where the
1218 host was specified on an smtp transport, and looking it up yielded more
1219 than one IP address.
1220
5cb8cbc6
PH
122131. Re-factored the code for checking spool and log partition space into a
1222 function that finds that data and another that does the check. The former
1223 is then used to implement four new variables: $spool_space, $log_space,
1224 $spool_inodes, and $log_inodes.
1225
14702f5b
PH
122632. The RFC2047 encoding function was originally intended for short strings
1227 such as real names; it was not keeping to the 75-character limit for
1228 encoded words that the RFC imposes. It now respects the limit, and
1229 generates multiple encoded words if necessary. To be on the safe side, I
1230 have increased the buffer size for the ${rfc2047: expansion operator from
1231 1024 to 2048 bytes.
1232
063b1e99
PH
123333. It is now permitted to omit both strings after an "if" condition; if the
1234 condition is true, the result is "true". As before, when the second string
1235 is omitted, a false condition yields an empty string. This makes it less
1236 cumbersome to write custom ACL and router conditions.
1237
652e1b65
PH
123834. Failure to deliver a bounce message always caused it to be frozen, even if
1239 there was an errors_to setting on the router. The errors_to setting is now
1240 respected.
1241
6f0c9a4f
PH
124235. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1243 canonical form (fully expanded) before being placed in
1244 $sender_host_address.
1245
33397d19
PH
124636. The table in the code that translates DNS record types into text (T_A to
1247 "A" for instance) was missing entries for NS and CNAME. It is just possible
1248 that this could have caused confusion if both these types were looked up
1249 for the same domain, because the text type is used as part of Exim's
1250 per-process caching. But the chance of anyone hitting this buglet seems
1251 very small.
1252
7bb56e1f
PH
125337. The dnsdb lookup has been extended in a number of ways.
1254
1255 (1) There is a new type, "zns", which walks up the domain tree until it
1256 finds some nameserver records. It should be used with care.
1257
ea3bc19b
PH
1258 (2) There is a new type, "mxh", which is like "mx" except that it returns
1259 just the host names, not the priorities.
1260
1261 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1262 looked up. The behaviour when one of the lookups defers can be
1263 controlled by a keyword.
7bb56e1f 1264
ea3bc19b 1265 (4) It is now possible to specify the separator character for use when
7bb56e1f 1266 multiple records are returned.
33397d19 1267
0bcb2a0e
PH
126838. The dnslists ACL condition has been extended: it is now possible to supply
1269 a list of IP addresses and/or domains to be looked up in a particular DNS
1270 domain.
1271
2ac0e484
PH
127239. Added log_selector=+queue_time_overall.
1273
4e1fde53
PH
127440. When running the queue in the test harness, wait just a tad after forking a
1275 delivery process, to get repeatability of debugging output.
1276
de365ded
PH
127741. Include certificate and key file names in error message when GnuTLS fails
1278 to set them up, because the GnuTLS error message doesn't include the name
1279 of the failing file when there is a problem reading it.
1280
f05da2e8
PH
128142. Allow both -bf and -bF in the same test run.
1282
d6453af2
PH
128343. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1284
f7b63901
PH
128544. The "Exiscan patch" is now merged into the mainline Exim source.
1286
128745. Sometimes the final signoff response after QUIT could fail to get
1288 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1289 < 0 before doing a fflush(). This bug looks as though it goes back to the
1290 introduction of TLS in release 3.20, but "sometimes" must have been rare
1291 because the tests only now provoked it.
1292
a444213a
PH
129346. Reset the locale to "C" after calling embedded Perl, in case it was changed
1294 (this can affect the format of dates).
1295
0ec020ea
PH
129647. exim_tidydb, when checking for the continued existence of a message for
1297 which it has found a message-specific retry record, was not finding
1298 messages that were in split spool directories. Consequently, it was
1299 deleting retry records that should have stayed in existence.
1300
b1206957
PH
130148. Steve fixed some bugs in eximstats.
1302
130349. The SPA authentication driver was not abandoning authentication and moving
1304 on to the next authenticator when an expansion was forced to fail,
1305 contradicting the general specification for all authenticators. Instead it
1306 was generating a temporary error. It now behaves as specified.
1307
26dd5a95
PH
130850. The default ordering of permitted cipher suites for GnuTLS was pessimal
1309 (the order specifies the preference for clients). The order is now AES256,
1310 AES128, 3DES, ARCFOUR128.
1311
343b2385
PH
131251. Small patch to Sieve code - explicitly set From: when generating an
1313 autoreply.
1314
1c5466b9
PH
131552. Exim crashed if a remote delivery caused a very long error message to be
1316 recorded - for instance if somebody sent an entire SpamAssassin report back
1317 as a large number of 550 error lines. This bug was coincidentally fixed by
1318 increasing the size of one of Exim's internal buffers (big_buffer) that
1319 happened as part of the Exiscan merge. However, to be on the safe side, I
1320 have made the code more robust (and fixed the comments that describe what
1321 is going on).
1322
55ee9ee3
PH
132353. Now that there can be additional text after "Completed" in log lines (if
1324 the queue_time_overall log selector is set), a one-byte patch to exigrep
1325 was needed to allow it to recognize "Completed" as not the last thing in
1326 the line.
1327
d38f8232
PH
132854. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1329 patch that reportedly fixes this has been added. I am not expert enough to
1330 create a test for it. This is what the patch creator wrote:
1331
1332 "I found a little strange behaviour of ldap code when working with
1333 Windows 2003 AD Domain, where users was placed in more than one
1334 Organization Units. When I tried to give exim partial DN, the exit code
1335 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1336 But simultaneously result of request was absolutely normal ldap result,
1337 so I produce this patch..."
1338
3295e65b
PH
1339 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1340 REFERENCE, so I have modified the code to exclude the patch when that macro
1341 is not defined.
1342
7102e136
PH
134355. Some experimental protocols are using DNS PTR records for new purposes. The
1344 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1345 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1346 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1347 CAN-2005-0021
7102e136 1348
3ca0ba97
PH
134956. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1350
c2bcbe20
PH
135157. Double the size of the debug message buffer (to 2048) so that more of very
1352 long debug lines gets shown.
1353
18ce445d
PH
135458. The exicyclog utility now does better if the number of log files to keep
1355 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1356
1f5b4c3d
PH
135759. Two changes related to the smtp_active_hostname option:
1358
1359 (1) $smtp_active_hostname is now available as a variable.
1360 (2) The default for smtp_banner uses $smtp_active_hostname instead
1361 of $primary_hostname.
1362
b975ba52
PH
136360. The host_aton() function is supposed to be passed a string that is known
1364 to be a valid IP address. However, in the case of IPv6 addresses, it was
1365 not checking this. This is a hostage to fortune. Exim now panics and dies
1366 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1367 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1368 components; fortuitously, this particular loophole had already been fixed
1369 by change 4.50/55 above.
1370
1371 If there are any other similar loopholes, the new check in host_aton()
1372 itself should stop them being exploited. The report I received stated that
1373 data on the command line could provoke the exploit when Exim was running as
1374 exim, but did not say which command line option was involved. All I could
1375 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1376 running as the user.
ea3a6f44 1377 CAN-2005-0021
85b87bc2
PH
1378
137961. There was a buffer overflow vulnerability in the SPA authentication code
1380 (which came originally from the Samba project). I have added a test to the
1381 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1382 CAN-2005-0022
b975ba52 1383
17ffcae7
PH
138462. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1385 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1386
d95f9fdb
PH
138763. The daemon start-up calls getloadavg() while still root for those OS that
1388 need the first call to be done as root, but it missed one case: when
1389 deliver_queue_load_max is set with deliver_drop_privilege. This is
1390 necessary for the benefit of the queue runner, because there is no re-exec
1391 when deliver_drop_privilege is set.
1392
86b8287f
PH
139364. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1394 This has been fixed.
1395
60dc5e56
PH
139665. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1397 was in use, was not putting the data itself into the right store pool;
1398 consequently, it could be overwritten for a subsequent message in the same
1399 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1400 the caching.)
1401
533244af
PH
140266. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1403
a5a28604
PH
140467. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1405 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1406 the function were treating the return as a boolean value, which happened to
1407 work because 0=false and not-0=true, but is not correct code.
1408
7e634d24
PH
140968. The host_aton() function was not handling scoped IPv6 addresses (those
1410 with, for example, "%eth0" on the end) correctly.
1411
3e11c26b
PH
141269. Fixed some compiler warnings in acl.c for the bitmaps specified with
1413 negated items (that is, ~something) in unsigned ints. Some compilers
1414 apparently mutter when there is no cast.
1415
6729cf78
PH
141670. If an address verification called from an ACL failed, and did not produce a
1417 user-specific message (i.e. there was only a "system" message), nothing was
1418 put in $acl_verify_message. In this situation, it now puts the system
1419 message there.
1420
00f00ca5
PH
142171. Change 4.23/11 added synchronization checking at the start of an SMTP
1422 session; change 4.31/43 added the unwanted input to the log line - except
1423 that it did not do this in the start of session case. It now does.
1424
c9bdd01c
PH
142572. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1426 This is wrong and can cause the other end to generate a synchronization
1427 error if it is another Exim or anything else that does the synchronization
1428 check. A QUIT command is no longer sent after a timeout.
1429
d43194df
PH
143073. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1431 during host lookups.
1432
fe5b5d0b
PH
143374. The defer_ok option of callout verification was not working if it was used
1434 when verifying addresses in header lines, that is, for this case:
1435
1436 verify = header_sender/callout=defer_ok
1437
76a2d7ba
PH
143875. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1439 those file descriptors could be used for SMTP connections. If anything
1440 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1441 could be sent to the SMTP client, causing chaos. The daemon now opens
1442 stdin, stdout, and stderr to /dev/null when it puts itself into the
1443 background.
1444
144576. Arrange for output from Perl's "warn" command to be written to Exim's main
1446 log by default. The user can override this with suitable Perl magic.
1447
04f7d5b9
PH
144877. The use of log_message on a "discard" ACL verb, which is supposed to add to
1449 the log message when discard triggers, was not working for the DATA ACL or
1450 for the non-SMTP ACL.
1451
bc60667e
PH
145278. Error message wording change in sieve.c.
1453
bb6e88ff
PH
145479. If smtp_accept_max_per_host was set, the number of connections could be
1455 restricted to fewer than expected, because the daemon was trying to set up
1456 a new connection before checking whether the processes handling previous
1457 connections had finished. The check for completed processes is now done
1458 earlier. On busy systems, this bug wouldn't be noticed because something
1459 else would have woken the daemon, and it would have reaped the completed
1460 process earlier.
1461
1e70f85b
PH
146280. If a message was submitted locally by a user whose login name contained one
1463 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1464 It caused a spool format error. I have fixed the spool reading code. A
1465 related problem was that the "from" clause in the Received: line became
1466 illegal because of the space(s). It is now covered by ${quote_local_part.
1467
146881. Included the latest eximstats from Steve (adds average sizes to HTML Top
1469 tables).
1470
4e01f9d6
PH
147182. Updated OS/Makefile-AIX as per message from Mike Meredith.
1472
1ee1cef2
PH
147383. Patch from Sieve maintainer to fix unterminated string problem in
1474 "vacation" handling.
1475
6e2b4ccc
PH
147684. Some minor changes to the Linux configuration files to help with other
1477 OS variants using glibc.
1478
8e669ac1
PH
147985. One more patch for Sieve to update vacation handling to latest spec.
1480
495ae4b0 1481
bbe902f0
PH
1482----------------------------------------------------
1483See the note above about the 4.44 and 4.50 releases.
1484----------------------------------------------------
1485
1486
1487Exim version 4.44
1488-----------------
1489
1490 1. Change 4.43/35 introduced a bug that caused file counts to be
1491 incorrectly computed when quota_filecount was set in an appendfile
1492 transport
1493
1494 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1495 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1496 place.
1497
1498 3. Give more explanation in the error message when the command for a transport
1499 filter fails to execute.
1500
1501 4. There are several places where Exim runs a non-Exim command in a
1502 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1503 was being done only for the command run by the queryprogram router. It is
1504 now done for all such subprocesses. The other cases are: ${run, transport
1505 filters, and the commands run by the lmtp and pipe transports.
1506
1507 5. Some older OS have a limit of 256 on the maximum number of file
1508 descriptors. Exim was using setrlimit() to set 1000 as a large value
1509 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1510 systems. I've change it so that if it can't get 1000, it tries for 256.
1511
1512 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1513 was an oversight, and furthermore, ever since the addition of extra
1514 controls (e.g. 4.43/32), the checks on when to allow different forms of
1515 "control" were broken. There should now be diagnostics for all cases when a
1516 control that does not make sense is encountered.
1517
1518 7. $recipients is now available in the predata ACL (oversight).
1519
1520 8. Tidy the search cache before the fork to do a delivery from a message
1521 received from the command line. Otherwise the child will trigger a lookup
1522 failure and thereby defer the delivery if it tries to use (for example) a
1523 cached ldap connection that the parent has called unbind on.
1524
1525 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1526 of $address_data from the recipient verification was clobbered by the
1527 sender verification.
1528
152910. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1530 was its contents. (It was OK if the option was not defined at all.)
1531
153211. A "Completed" log line is now written for messages that are removed from
1533 the spool by the -Mrm option.
1534
153512. $host_address is now set to the target address during the checking of
1536 ignore_target_hosts.
1537
153813. When checking ignore_target_hosts for an ipliteral router, no host name was
1539 being passed; this would have caused $sender_host_name to have been used if
1540 matching the list had actually called for a host name (not very likely,
1541 since this list is usually IP addresses). A host name is now passed as
1542 "[x.x.x.x]".
1543
154414. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1545 code that specifies a non-restarting handler (typically sigaction() in
1546 modern systems) in an attempt to fix a rare and obscure crash bug.
1547
154815. Narrowed the window for a race in the daemon that could cause it to ignore
1549 SIGCHLD signals. This is not a major problem, because they are used only to
1550 wake it up if nothing else does.
1551
155216. A malformed maildirsize file could cause Exim to calculate negative values
1553 for the mailbox size or file count. Odd effects could occur as a result.
1554 The maildirsize information is now recalculated if the size or filecount
1555 end up negative.
1556
155717. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1558 support for a long time. Removed HAVE_SYS_VFS_H.
1559
ea3a6f44 156018. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1561
156219. Allow an empty sender to be matched against a lookup in an address list.
1563 Previously the only cases considered were a regular expression, or an
1564 empty pattern.
1565
156620. Exim went into a mad DNS lookup loop when doing a callout where the
1567 host was specified on the transport, if the DNS lookup yielded more than
1568 one IP address.
1569
ea3a6f44
NM
157021. The RFC2047 encoding function was originally intended for short strings
1571 such as real names; it was not keeping to the 75-character limit for
1572 encoded words that the RFC imposes. It now respects the limit, and
1573 generates multiple encoded words if necessary. To be on the safe side, I
1574 have increased the buffer size for the ${rfc2047: expansion operator from
1575 1024 to 2048 bytes.
bbe902f0 1576
ea3a6f44
NM
157722. Failure to deliver a bounce message always caused it to be frozen, even if
1578 there was an errors_to setting on the router. The errors_to setting is now
1579 respected.
bbe902f0
PH
1580
158123. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1582 canonical form (fully expanded) before being placed in
1583 $sender_host_address.
1584
158524. Updated eximstats to version 1.33
1586
ea3a6f44
NM
158725. Include certificate and key file names in error message when GnuTLS fails
1588 to set them up, because the GnuTLS error message doesn't include the name
1589 of the failing file when there is a problem reading it.
bbe902f0
PH
1590
159126. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1592 As per change 25.
bbe902f0 1593
ea3a6f44
NM
159427. Reset the locale to "C" after calling embedded Perl, in case it was changed
1595 (this can affect the format of dates).
bbe902f0 1596
ea3a6f44
NM
159728. exim_tidydb, when checking for the continued existence of a message for
1598 which it has found a message-specific retry record, was not finding
1599 messages that were in split spool directories. Consequently, it was
1600 deleting retry records that should have stayed in existence.
bbe902f0
PH
1601
160229. eximstats updated to version 1.35
1603 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1604 1.35 - bugfix such that pie charts by volume are generated correctly
1605
ea3a6f44
NM
160630. The SPA authentication driver was not abandoning authentication and moving
1607 on to the next authenticator when an expansion was forced to fail,
1608 contradicting the general specification for all authenticators. Instead it
1609 was generating a temporary error. It now behaves as specified.
bbe902f0 1610
ea3a6f44
NM
161131. The default ordering of permitted cipher suites for GnuTLS was pessimal
1612 (the order specifies the preference for clients). The order is now AES256,
1613 AES128, 3DES, ARCFOUR128.
bbe902f0 1614
ea3a6f44
NM
161531. Small patch to Sieve code - explicitly set From: when generating an
1616 autoreply.
bbe902f0 1617
ea3a6f44
NM
161832. Exim crashed if a remote delivery caused a very long error message to be
1619 recorded - for instance if somebody sent an entire SpamAssassin report back
1620 as a large number of 550 error lines. This bug was coincidentally fixed by
1621 increasing the size of one of Exim's internal buffers (big_buffer) that
1622 happened as part of the Exiscan merge. However, to be on the safe side, I
1623 have made the code more robust (and fixed the comments that describe what
1624 is going on).
bbe902f0 1625
ea3a6f44
NM
162633. Some experimental protocols are using DNS PTR records for new purposes. The
1627 keys for these records are domain names, not reversed IP addresses. The
1628 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1629 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1630 CAN-2005-0021
1631
ea3a6f44
NM
163234. The host_aton() function is supposed to be passed a string that is known
1633 to be a valid IP address. However, in the case of IPv6 addresses, it was
1634 not checking this. This is a hostage to fortune. Exim now panics and dies
1635 if the condition is not met. A case was found where this could be provoked
1636 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1637 components; fortuitously, this particular loophole had already been fixed
1638 by change 4.50/55 or 4.44/33 above.
1639
1640 If there are any other similar loopholes, the new check in host_aton()
1641 itself should stop them being exploited. The report I received stated that
1642 data on the command line could provoke the exploit when Exim was running as
1643 exim, but did not say which command line option was involved. All I could
1644 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1645 running as the user.
bbe902f0
PH
1646 CAN-2005-0021
1647
ea3a6f44
NM
164835. There was a buffer overflow vulnerability in the SPA authentication code
1649 (which came originally from the Samba project). I have added a test to the
1650 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1651 CAN-2005-0022
1652
ea3a6f44
NM
165336. The daemon start-up calls getloadavg() while still root for those OS that
1654 need the first call to be done as root, but it missed one case: when
1655 deliver_queue_load_max is set with deliver_drop_privilege. This is
1656 necessary for the benefit of the queue runner, because there is no re-exec
1657 when deliver_drop_privilege is set.
bbe902f0 1658
ea3a6f44
NM
165937. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1660 was in use, was not putting the data itself into the right store pool;
1661 consequently, it could be overwritten for a subsequent message in the same
1662 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1663 the caching.)
bbe902f0 1664
ea3a6f44
NM
166538. Sometimes the final signoff response after QUIT could fail to get
1666 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1667 < 0 before doing a fflush(). This bug looks as though it goes back to the
1668 introduction of TLS in release 3.20, but "sometimes" must have been rare
1669 because the tests only now provoked it.
bbe902f0
PH
1670
1671
495ae4b0
PH
1672Exim version 4.43
1673-----------------
1674
1675 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1676 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1677 Now it returns an integer. A number of calls were still expecting a T/F
1678 return. Fortuitously, in all cases, the tests worked in OK situations,
1679 which is the norm. However, things would have gone wrong on any write
1680 failures on the smtp file descriptor. This function is used when sending
1681 messages over SMTP and also when doing verify callouts.
1682
1683 2. When Exim is called to do synchronous delivery of a locally submitted
1684 message (the -odf or -odi options), it no longer closes stderr before doing
1685 the delivery.
1686
1687 3. Implemented the mua_wrapper option.
1688
1689 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1690
1691 5. Implemented the functions header_remove(), header_testname(),
1692 header_add_at_position(), and receive_remove_recipient(), and exported them
1693 to local_scan().
1694
1695 6. If an ACL "warn" statement specified the addition of headers, Exim already
1696 inserted X-ACL-Warn: at the start if there was no header name. However, it
1697 was not making this test for the second and subsequent header lines if
1698 there were newlines in the string. This meant that an invalid header could
1699 be inserted if Exim was badly configured.
1700
1701 7. Allow an ACL "warn" statement to add header lines at the start or after all
1702 the Received: headers, as well as at the end.
1703
1704 8. Added the rcpt_4xx retry error code.
1705
1706 9. Added postmaster_mailfrom=xxx to callout verification option.
1707
170810. Added mailfrom=xxxx to the callout verification option, for verify=
1709 header_sender only.
1710
171111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1712 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1713
171412. Inserted some casts to stop certain compilers warning when using pointer
1715 differences as field lengths or precisions in printf-type calls (mostly
1716 affecting debugging statements).
1717
171813. Added optional readline() support for -be (dynamically loaded).
1719
172014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1721 same clock tick as a message's arrival, so that its received time was the
1722 same as the "first fail" time on the retry record, and that message
1723 remained on the queue past the ultimate address timeout, every queue runner
1724 would try a delivery (because it was past the ultimate address timeout) but
1725 after another failure, the ultimate address timeout, which should have then
1726 bounced the address, did not kick in. This was a "< instead of <=" error;
1727 in most cases the first failure would have been in the next clock tick
1728 after the received time, and all would be well.
1729
173015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1731 being recognized when the domain list was tested by the match_domain
1732 condition in an expansion string.
1733
173416. Added the ${str2b64: operator.
1735
173617. Exim was always calling setrlimit() to set a large limit for the number of
1737 processes, without checking whether the existing limit was already
1738 adequate. (It did check for the limit on file descriptors.) Furthermore,
1739 errors from getrlimit() and setrlimit() were being ignored. Now they are
1740 logged to the main and panic logs, but Exim does carry on, to try to do its
1741 job under whatever limits there are.
1742
174318. Imported PCRE 5.0.
1744
174519. Trivial typo in log message " temporarily refused connection" (the leading
1746 space).
1747
174820. If the log selector return_path_on_delivery was set and an address was
1749 redirected to /dev/null, the delivery process crashed because it assumed
1750 that a return path would always be set for a "successful" delivery. In this
1751 case, the whole delivery is bypassed as an optimization, and therefore no
1752 return path is set.
1753
175421. Internal re-arrangement: the function for sending a challenge and reading
1755 a response while authentication was assuming a zero-terminated challenge
1756 string. It's now changed to take a pointer and a length, to allow for
1757 binary data in such strings.
1758
175922. Added the cyrus_sasl authenticator (code supplied by MBM).
1760
176123. Exim was not respecting finduser_retries when seeking the login of the
1762 uid under which it was called; it was always trying 10 times. (The default
1763 setting of finduser_retries is zero.) Also, it was sleeping after the final
1764 failure, which is pointless.
1765
176624. Implemented tls_on_connect_ports.
1767
176825. Implemented acl_smtp_predata.
1769
177026. If the domain in control=submission is set empty, Exim assumes that the
1771 authenticated id is a complete email address when it generates From: or
1772 Sender: header lines.
1773
177427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1775 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1776 chown and chgrp in /bin and hostname in /usr/bin.
1777
177828. Exim was keeping the "process log" file open after each use, just as it
1779 does for the main log. This opens the possibility of it remaining open for
1780 long periods when the USR1 signal hits a daemon. Occasional processlog
1781 errors were reported, that could have been caused by this. Anyway, it seems
1782 much more sensible not to leave this file open at all, so that is what now
1783 happens.
1784
178529. The long-running daemon process does not normally write to the log once it
1786 has entered its main loop, and it closes the log before doing so. This is
1787 so that log files can straightforwardly be renamed and moved. However,
1788 there are a couple of unusual error situations where the daemon does write
1789 log entries, and I had neglected to close the log afterwards.
1790
179130. The text of an SMTP error response that was received during a remote
1792 delivery was being truncated at 512 bytes. This is too short for some of
1793 the long messages that one sometimes sees. I've increased the limit to
1794 1024.
1795
179631. It is now possible to make retry rules that apply only when a message has a
1797 specific sender, in particular, an empty sender.
1798
179932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1800 it possible to be selective about when SMTP synchronization is enforced.
1801
180233. Added "control = caseful_local_part" and "control = "caselower_local_part".
1803
180432. Implemented hosts_connection_nolog.
1805
180633. Added an ACL for QUIT.
1807
180834. Setting "delay_warning=" to disable warnings was not working; it gave a
1809 syntax error.
1810
181135. Added mailbox_size and mailbox_filecount to appendfile.
1812
181336. Added control = no_multiline_responses to ACLs.
1814
181537. There was a bug in the logic of the code that waits for the clock to tick
1816 in the case where the clock went backwards by a substantial amount such
1817 that the microsecond fraction of "now" was more than the microsecond
1818 fraction of "then" (but the whole seconds number was less).
1819
182038. Added support for the libradius Radius client library this is found on
1821 FreeBSD (previously only the radiusclient library was supported).
1822
1823
1824Exim version 4.42
1825-----------------
1826
1827 1. When certain lookups returned multiple values in the form name=value, the
1828 quoting of the values was not always being done properly. Specifically:
1829 (a) If the value started with a double quote, but contained no whitespace,
1830 it was not quoted.
1831 (b) If the value contained whitespace other than a space character (i.e.
1832 tabs or newlines or carriage returns) it was not quoted.
1833 This fix has been applied to the mysql and pgsql lookups by writing a
1834 separate quoting function and calling it from the lookup code. The fix
1835 should probably also be applied to nisplus, ibase and oracle lookups, but
1836 since I cannot test any of those, I have not disturbed their existing code.
1837
1838 2. A hit in the callout cache for a specific address caused a log line with no
1839 reason for rejecting RCPT. Now it says "Previous (cached) callout
1840 verification failure".
1841
1842 3. There was an off-by-one bug in the queryprogram router. An over-long
1843 return line was truncated at 256 instead of 255 characters, thereby
1844 overflowing its buffer with the terminating zero. As well as fixing this, I
1845 have increased the buffer size to 1024 (and made a note to document this).
1846
1847 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1848 when Exim is waiting for an SMTP response from a remote server, Exim
1849 restarts its select() call on the socket, thereby resetting its timeout.
1850 This is not a problem when such interrupts are rare. Somebody set up a cron
1851 job to run exiwhat every 2 minutes, which is less than the normal select()
1852 timeout (5 or 10 minutes). This meant that the select() timeout never
1853 kicked in because it was always reset. I have fixed this by comparing the
1854 time when an interrupt arrives with the time at the start of the first call
1855 to select(). If more time than the timeout has elapsed, the interrupt is
1856 treated as a timeout.
1857
1858 5. Some internal re-factoring in preparation for the addition of Sieve
1859 extensions (by MH). In particular, the "personal" test is moved to a
1860 separate function, and given an option for scanning Cc: and Bcc: (which is
1861 not set for Exim filters).
1862
1863 6. When Exim created an email address using the login of the caller as the
1864 local part (e.g. when creating a From: or Sender: header line), it was not
1865 quoting the local part when it contained special characters such as @.
1866
1867 7. Installed new OpenBSD configuration files.
1868
1869 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1870 try to make them clearer.
1871
1872 9. Callout options, other than the timeout value, were being ignored when
1873 verifying sender addresses in header lines. For example, when using
1874
1875 verify = header_sender/callout=no_cache
1876
1877 the cache was (incorrectly) being used.
1878
187910. Added a missing instance of ${EXE} to the exim_install script; this affects
1880 only the Cygwin environment.
1881
188211. When return_path_on_delivery was set as a log selector, if different remote
1883 addresses in the same message used different return paths and parallel
1884 remote delivery occurred, the wrong values would sometimes be logged.
1885 (Whenever a remote delivery process finished, the return path value from
1886 the most recently started remote delivery process was logged.)
1887
188812. RFC 3848 specifies standard names for the "with" phrase in Received: header
1889 lines when AUTH and/or TLS are in use. This is the "received protocol"
1890 field. Exim used to use "asmtp" for authenticated SMTP, without any
1891 indication (in the protocol name) for TLS use. Now it follows the RFC and
1892 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1893 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1894 names appear in log lines as well as in Received: header lines.
1895
189613. Installed MH's patches for Sieve to add the "copy" and "vacation"
1897 extensions, and comparison tests, and to fix some bugs.
1898
189914. Changes to the "personal" filter test:
1900
1901 (1) The test was buggy in that it was just doing the equivalent of
1902 "contains" tests on header lines. For example, if a user's address was
1903 anne@some.where, the "personal" test would incorrectly be true for
1904
1905 To: susanne@some.where
1906
1907 This test is now done by extracting each address from the header in turn,
1908 and checking the entire address. Other tests that are part of "personal"
1909 are now done using regular expressions (for example, to check local parts
1910 of addresses in From: header lines).
1911
1912 (2) The list of non-personal local parts in From: addresses has been
1913 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1914 taken from the Sieve specification recommendations.
1915
1916 (3) If the message contains any header line starting with "List-" it is
1917 treated as non-personal.
1918
1919 (4) The test for "circular" in the Subject: header line has been removed
1920 because it now seems ill-conceived.
1921
192215. Minor typos in src/EDITME comments corrected.
1923
192416. Installed latest exipick from John Jetmore.
1925
192617. If headers_add on a router specified a text string that was too long for
1927 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1928 of string_sprintf() is now avoided.
1929
193018. $message_body_size was not set (it was always zero) when running the DATA
1931 ACL and the local_scan() function.
1932
193319. For the "mail" command in an Exim filter, no default was being set for
1934 the once_repeat time, causing a random time value to be used if "once" was
1935 specified. (If the value happened to be <= 0, no repeat happened.) The
1936 default is now 0s, meaning "never repeat". The "vacation" command was OK
1937 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1938 (I found it when inspecting the code).
1939
194020. There is now an overall timeout for performing a callout verification. It
1941 defaults to 4 times the callout timeout, which applies to individual SMTP
1942 commands during the callout. The overall timeout applies when there is more
1943 than one host that can be tried. The timeout is checked before trying the
1944 next host. This prevents very long delays if there are a large number of
1945 hosts and all are timing out (e.g. when the network connections are timing
1946 out). The value of the overall timeout can be changed by specifying an
1947 additional sub-option for "callout", called "maxwait". For example:
1948
1949 verify = sender/callout=5s,maxwait=20s
1950
195121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1952 to the end before writing, but this should make it even safer).
1953
195422. Exim was forgetting that it had advertised PIPELINING for the second and
1955 subsequent messages on an SMTP connection. It was also not resetting its
1956 memory on STARTTLS and an internal HELO.
1957
195823. When Exim logs an SMTP synchronization error within a session, it now
1959 records whether PIPELINING has been advertised or not.
1960
196124. Added 3 instances of "(long int)" casts to time_t variables that were being
1962 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1963 rather than long int.
1964
196525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1966
196726. Added the never_mail option to autoreply.
1968
1969
1970Exim version 4.41
1971-----------------
1972
1973 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1974 crash if the getsockname() call failed; this can happen if a connection is
1975 closed very soon after it is established. The problem was simply in the
1976 order in which certain operations were done, causing Exim to try to write
1977 to the SMTP stream before it had set up the file descriptor. The bug has
1978 been fixed by making things happen in the correct order.
1979
1980
1981Exim version 4.40
1982-----------------
1983
1984 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1985 before the connection was closed, thus losing the rejection response.
1986
1987 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1988 some early Solaris releases, but causes trouble in current releases where
1989 socklen_t is defined.
1990
1991 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1992 always exist.
1993
1994 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1995 configured.
1996
1997 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1998 that releasing the top of it at the end releases what was used for sub-
1999 expansions (unless the block got too big). However, discard this block if
2000 the first thing is a variable or header, so that we can use its block when
2001 it is dynamic (useful for very large $message_headers, for example).
2002
2003 6. Lookups now cache *every* query, not just the most recent. A new, separate
2004 store pool is used for this. It can be recovered when all lookup caches are
2005 flushed. Lookups now release memory at the end of their result strings.
2006 This has involved some general refactoring of the lookup sources.
2007
2008 7. Some code has been added to the store_xxx() functions to reduce the amount
2009 of flapping under certain conditions.
2010
2011 8. log_incoming_interface used to affect only the <= reception log lines. Now
2012 it causes the local interface and port to be added to several more SMTP log
2013 lines, for example "SMTP connection from", and rejection lines.
2014
2015 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2016
201710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2018
201911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2020 could be overwritten at the end of the current message (or the start of a
2021 new message if it was set in a HELO ACL). The value is now preserved for
2022 the duration of the SMTP connection.
2023
202412. If a transport had a headers_rewrite setting, and a matching header line
2025 contained an unqualified address, that address was qualified, even if it
2026 did not match any rewriting rules. The underlying bug was that the values
2027 of the flags that permit the existence of unqualified sender and recipient
2028 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2029 non-local messages, and by -bnq for local messages) were not being
2030 preserved with the message after it was received.
2031
203213. When Exim was logging an SMTP synchronization error, it could sometimes log
2033 "next input=" as part of the text comprising the host identity instead of
2034 the correct text. The code was using the same buffer for two different
2035 strings. However, depending on which order the printing function evaluated
2036 its arguments, the bug did not always show up. Under Linux, for example, my
2037 test suite worked just fine.
2038
203914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2040 doesn't work with some older versions of Perl. It has been changed to "my",
2041 which in any case is probably the better facility to use.
2042
204315. A really picky compiler found some instances of statements for creating
2044 error messages that either had too many or two few arguments for the format
2045 string.
2046
204716. The size of the buffer for calls to the DNS resolver has been increased
2048 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2049 for addresses that have a lot of PTR records. This alleviates a problem; it
2050 does not fully solve it.
2051
205217. A dnsdb lookup for PTR records that receives more data than will fit in the
2053 buffer now truncates the list and logs the incident, which is the same
2054 action as happens when Exim is looking up a host name and its aliases.
2055 Previously in this situation something unpredictable would happen;
2056 sometimes it was "internal error: store_reset failed".
2057
205818. If a server dropped the connection unexpectedly when an Exim client was
2059 using GnuTLS and trying to read a response, the client delivery process
2060 crashed while trying to generate an error log message.
2061
206219. If a "warn" verb in an ACL added multiple headers to a message in a single
2063 string, for example:
2064
2065 warn message = H1: something\nH2: something
2066
2067 the text was added as a single header line from Exim's point of view
2068 though it ended up OK in the delivered message. However, searching for the
2069 second and subsequent header lines using $h_h2: did not work. This has been
2070 fixed. Similarly, if a system filter added multiple headers in this way,
2071 the routers could not see them.
2072
207320. Expanded the error message when iplsearch is called with an invalid key to
2074 suggest using net-iplsearch in a host list.
2075
207621. When running tests using -bh, any delays imposed by "delay" modifiers in
2077 ACLs are no longer actually imposed (and a message to that effect is
2078 output).
2079
208022. If a "gecos" field in a passwd entry contained escaped characters, in
2081 particular, if it contained a \" sequence, Exim got it wrong when building
2082 a From: or a Sender: header from that name. A second bug also caused
2083 incorrect handling when an unquoted " was present following a character
2084 that needed quoting.
2085
208623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2087 was not being matched caselessly.
2088
208924. Arranged for all hyphens in the exim.8 source to be escaped with
2090 backslashes.
2091
209225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2093 properly. Recipient callout cache records were still being keyed to include
2094 the sender, even when use_sender was set false. This led to far more
2095 callouts that were necessary. The sender is no longer included in the key
2096 when use_sender is false.
2097
209826. Added "control = submission" modifier to ACLs.
2099
210027. Added the ${base62d: operator to decode base 62 numbers.
2101
210228. dnsdb lookups can now access SRV records.
2103
210429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2105 the configuration file.
2106
210730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2108 (-v) mode. This makes the output for a verbose queue run more intelligible.
2109
211031. Added a use_postmaster feature to recipient callouts.
2111
211232. Added the $body_zerocount variable, containing the number of binary zero
2113 bytes in the message body.
2114
211533. The time of last modification of the "new" subdirectory is now used as the
2116 "mailbox time last read" when there is a quota error for a maildir
2117 delivery.
2118
211934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2120
212135. Added +ignore_unknown as a special item in host lists.
2122
212336. Code for decoding IPv6 addresses in host lists is now included, even if
2124 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2125 address was recognized as an IP address, but was then not correctly decoded
2126 into binary, causing unexpected and incorrect effects when compared with
2127 another IP address.
2128
2129
2130Exim version 4.34
2131-----------------
2132
2133 1. Very minor rewording of debugging text in manualroute to say "list of
2134 hosts" instead of "hostlist".
2135
2136 2. If verify=header_syntax was set, and a header line with an unqualified
2137 address (no domain) and a large number of spaces between the end of the
2138 name and the colon was received, the reception process suffered a buffer
2139 overflow, and (when I tested it) crashed. This was caused by some obsolete
2140 code that should have been removed. The fix is to remove it!
2141
2142 3. When running in the test harness, delay a bit after writing a bounce
2143 message to get a bit more predictability in the log output.
2144
2145 4. Added a call to search_tidyup() just before forking a reception process. In
2146 theory, someone could use a lookup in the expansion of smtp_accept_max_
2147 per_host which, without the tidyup, could leave open a database connection.
2148
2149 5. Added the variables $recipient_data and $sender_data which get set from a
2150 lookup success in an ACL "recipients" or "senders" condition, or a router
2151 "senders" option, similar to $domain_data and $local_part_data.
2152
2153 6. Moved the writing of debug_print from before to after the "senders" test
2154 for routers.
2155
2156 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2157 problems for message scanning, either using a data ACL, or using
2158 local_scan() because the Received: header was not generated till after they
2159 were called (in order to set the time as the time of reception completion).
2160 I have revised the way this works. The header is now generated after the
2161 body is received, but before the ACL or local_scan() are called. After they
2162 are run, the timestamp in the header is updated.
2163
2164
2165Exim version 4.33
2166-----------------
2167
2168 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2169 before starting a queue runner without re-exec. This happened only when
2170 deliver_drop_privilege was set or when the Exim user was set to root. The
2171 effect of the bug was that timeouts during subsequent deliveries caused
2172 crashes instead of being properly handled. The handler is now left at its
2173 default (and expected) setting.
2174
2175 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2176 message, again when deliver_drop_privilege is set or Exim is run as root.
2177 The bug described in (1) was not present in this case, but the tidying up
2178 of the other signals was missing. I have made the two cases consistent.
2179
2180 3. The ignore_target_hosts setting on a manualroute router was being ignored
2181 for hosts that were looked up using the /MX notation.
2182
2183 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2184 in domain lists.
2185
2186 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2187 operated on the sender address. After changing the $sender_address to <>
2188 for the sender address verify, Exim was re-instated it as the original
2189 (before rewriting) address, but remembering that it had rewritten it, so it
2190 wasn't rewriting it again. This bug also had the effect of breaking the
2191 sender address verification caching when the sender address was rewritten.
2192
2193 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2194 This has been changed so that if the ip literal address matches
2195 ignore_target_hosts, the router declines.
2196
2197 7. Added expansion conditions match_domain, match_address, and match_local_
2198 part (NOT match_host).
2199
2200 8. The placeholder for the Received: header didn't have a length field set.
2201
2202 9. Added code to Exim itself and to exim_lock to test for a specific race
2203 condition that could lead to file corruption when using MBX delivery. The
2204 issue is with the lockfile that is created in /tmp. If this file is removed
2205 after a process has opened it but before that process has acquired a lock,
2206 there is the potential for a second process to recreate the file and also
2207 acquire a lock. This could lead to two Exim processes writing to the file
2208 at the same time. The added code performs the same test as UW imapd; it
2209 checks after acquiring the lock that its file descriptor still refers to
2210 the same named file.
2211
221210. The buffer for building added header lines was of fixed size, 8192 bytes.
2213 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2214 when Exim is built.
2215
221611. Added the smtp_active_hostname option. If used, this will typically be made
2217 to depend on the incoming interface address. Because $interface_address is
2218 not set up until the daemon has forked a reception process, error responses
2219 that can happen earlier (such as "too many connections") no longer contain
2220 a host name.
2221
222212. If an expansion in a condition on a "warn" statement fails because a lookup
2223 defers, the "warn" statement is abandoned, and the next ACL statement is
2224 processed. Previously this caused the whole ACL to be aborted.
2225
222613. Added the iplsearch lookup type.
2227
222814. Added ident_timeout as a log selector.
2229
223015. Added tls_certificate_verified as a log selector.
2231
223216. Added a global option tls_require_ciphers (compare the smtp transport
2233 option of the same name). This controls incoming TLS connections.
2234
223517. I finally figured out how to make tls_require_ciphers do a similar thing
2236 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2237 before starting the TLS session.
2238
223918. Tabs are now shown as \t in -bP output.
2240
224119. If the log selector return_path_on_delivery was set, Exim crashed when
2242 bouncing a message because it had too many Received: header lines.
2243
224420. If two routers both had headers_remove settings, and the first one included
2245 a superfluous trailing colon, the final name in the first list and the
2246 first name in the second list were incorrectly joined into one item (with a
2247 colon in the middle).
2248
2249
2250Exim version 4.32
2251-----------------
2252
2253 1. Added -C and -D options to the exinext utility, mainly to make it easier
2254 to include in the automated testing, but these could be helpful when
2255 multiple configurations are in use.
2256
2257 2. The exinext utility was not formatting the output nicely when there was
2258 an alternate port involved in the retry record key, nor when there was a
2259 message id as well (for retries that were specific to a specific message
2260 and a specific host). It was also confused by IPv6 addresses, because of
2261 the additional colons they contain. I have fixed the IPv4 problem, and
2262 patched it up to do a reasonable job for IPv6.
2263
2264 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2265 delivery, the log line now contains "pipelined" if PIPELINING was used.
2266
2267 4. An SMTP transport process used to panic and die if the bind() call to set
2268 an explicit outgoing interface failed. This has been changed; it is now
2269 treated in the same way as a connect() failure.
2270
2271 5. A reference to $sender_host_name in the part of a conditional expansion
2272 that was being skipped was still causing a DNS lookup. This no longer
2273 occurs.
2274
2275 6. The def: expansion condition was not recognizing references to header lines
2276 that used bh_ and bheader_.
2277
2278 7. Added the _cache feature to named lists.
2279
2280 8. The code for checking quota_filecount in the appendfile transport was
2281 allowing one more file than it should have been.
2282
2283 9. For compatibility with Sendmail, the command line option
2284
2285 -prval:sval
2286
2287 is equivalent to
2288
2289 -oMr rval -oMs sval
2290
2291 and sets the incoming protocol and host name (for trusted callers). The
2292 host name and its colon can be omitted when only the protocol is to be set.
2293 Note the Exim already has two private options, -pd and -ps, that refer to
2294 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2295 "s", but I don't think that's a major issue.
2296
229710. A number of refactoring changes to the code, none of which should affect
2298 Exim's behaviour:
2299
2300 (a) The number of logging options was getting close to filling up the
2301 32-bit word that was used as a bit map. I have split them into two classes:
2302 those that are passed in the argument to log_write(), and those that are
2303 only ever tested independently outside of that function. These are now in
2304 separate 32-bit words, so there is plenty of room for expansion again.
2305 There is no change in the user interface or the logging behaviour.
2306
2307 (b) When building, for example, log lines, the code previously used a
2308 macro that called string_cat() twice, in order to add two strings. This is
2309 not really sufficiently general. Furthermore, there was one instance where
2310 it was actually wrong because one of the argument was used twice, and in
2311 one call a function was used. (As it happened, calling the function twice
2312 did not affect the overall behaviour.) The macro has been replaced by a
2313 function that can join an arbitrary number of extra strings onto a growing
2314 string.
2315
2316 (c) The code for expansion conditions now uses a table and a binary chop
2317 instead of a serial search (which was left over from when there were very
2318 few conditions). Also, it now recognizes conditions like "pam" even when
2319 the relevant support is not compiled in: a suitably worded error message is
2320 given if an attempt is made to use such a condition.
2321
232211. Added ${time_interval:xxxxx}.
2323
232412. A bug was causing one of the ddress fields not to be passed back correctly
2325 from remote delivery subprocesses. The field in question was not being
2326 subsequently used, so this caused to problems in practice.
2327
232813. Added new log selectors queue_time and deliver_time.
2329
233014. Might have fixed a bug in maildirsizefile handling that threw up
2331 "unexpected character" debug warnings, and recalculated the data
2332 unnecessarily. In any case, I expanded the warning message to give more
2333 information.
2334
233515. Added the message "Restricted characters in address" to the statements in
2336 the default ACL that block characters like @ and % in local parts.
2337
233816. Change 71 for release 4.31 proved to be much less benign that I imagined.
2339 Three changes have been made:
2340
2341 (a) There was a serious bug; a negative response to MAIL caused the whole
2342 recipient domain to be cached as invalid, thereby blocking all messages
2343 to all local parts at the same domain, from all senders. This bug has
2344 been fixed. The domain is no longer cached after a negative response to
2345 MAIL if the sender used is not empty.
2346
2347 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2348 been restored.
2349
2350 (c) A new callout option, "use_sender" has been added for people who want
2351 the modified behaviour.
2352
2353
2354Exim version 4.31
2355-----------------
2356
2357 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2358 Larry Rosenman.
2359
2360 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2361 indeed breaks things for older releases.
2362
2363 3. Added additional logging to the case where there is a problem reading data
2364 from a filter that is running in a subprocess using a pipe, in order to
2365 try to track down a specific problem.
2366
2367 4. Testing facility fudge: when running in the test harness and attempting
2368 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2369 getting "No route to host". Convert this to a timeout.
2370
2371 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2372 warning.
2373
2374 6. Some OS don't have socklen_t but use size_t instead. This affects the
2375 fifth argument of getsockopt() amongst other things. This is now
2376 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2377 can be set for individual OS. I have set it for SunOS5, OSF1, and
2378 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2379 some earlier ones do not.
2380
2381 7. Change 4.30/15 was not doing the test caselessly.
2382
2383 8. The standard form for an IPv6 address literal was being rejected by address
2384 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2385 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2386 this, as well as the form without the "IPv6" on the front (but only when
2387 address literals are enabled, of course).
2388
2389 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2390
239110. Exim crashed if a message with an empty sender address specified by -f
2392 encountered a router with an errors_to setting. This could be provoked only
2393 by a command such as
2394
2395 exim -f "" ...
2396
2397 where an empty string was supplied; "<>" did not hit this bug.
2398
239911. Installed PCRE release 4.5.
2400
240112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2402 remained set. It is now erased.
2403
240413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2405 times from message ids (which are base 36 rather than the normal 62).
2406
240714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2408 were being counted as actual protocol errors, and logged if the log
2409 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2410 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2411 and DATA following a set of rejected RCPTs do not count as protocol errors.
2412 In other words, Exim assumes they were pipelined, though this may not
2413 actually be the case. Of course, in all cases the client gets an
2414 appropriate error code.
2415
241615. If a lookup fails in an ACL condition, a message about the failure may
2417 be available; it is used if testing the ACL cannot continue, because most
2418 such messages specify what the cause of the deferral is. However, some
2419 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2420 that caused an old message to be retained and used if a later statement
2421 caused a defer, replacing the real cause of the deferral.
2422
242316. If an IP address had so many PTR records that the DNS lookup buffer
2424 was not large enough to hold them, Exim could crash while trying to process
2425 the truncated data. It now detects and logs this case.
2426
242717. Further to 4.21/58, another change has been made: if (and only if) the
2428 first line of a message (the first header line) ends with CRLF, a bare LF
2429 in a subsequent header line has a space inserted after it, so as not to
2430 terminate the header.
2431
243218. Refactoring: tidied an ugly bit of code in appendfile that copied data
2433 unnecessarily, used atoi() instead of strtol(), and didn't check the
2434 termination when getting file sizes from file names by regex.
2435
243619. Completely re-implemented the support for maildirsize files, in the light
2437 of a number of problems with the previous contributed implementation
2438 (4.30/29). In particular:
2439
2440 . If the quota is zero, the maildirsize file is maintained, but no quota is
2441 imposed.
2442
2443 . If the maildir directory does not exist, it is created before any attempt
2444 to write a maildirsize file.
2445
2446 . The quota value in the file is just a cache; if the quota is changed in
2447 the transport, the new value overrides.
2448
2449 . A regular expression is available for excluding directories from the
2450 count.
2451
245220. The autoreply transport checks the characters in options that define the
2453 message's headers; it allows continued headers, but it was checking with
2454 isspace() after an embedded newline instead of explicitly looking for a
2455 space or a tab.
2456
245721. If all the "regular" hosts to which an address was routed had passed their
2458 expiry times, and had not reached their retry times, the address was
2459 bounced, even if fallback hosts were defined. Now Exim should go on to try
2460 the fallback hosts.
2461
246222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2463 equivalent code in the SMTP transport. Some hosts send humungous responses
2464 to HELO/EHLO, more than 1024 it seems.
2465
246623. Refactoring: code in filter.c used (void *) for "any old type" but this
2467 gives compiler warnings in some environments. I've now done it "properly",
2468 using a union.
2469
247024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2471 (because of problems with the built-in one) was declared to return uschar *
2472 instead of char *, causing compiler failure.
2473
247425. Fixed a file descriptor leak when processing alias/forward files.
2475
247626. Fixed a minor format string issue in dbfn.c.
2477
247827. Typo in exim.c: ("dmbnz" for "dbmnz").
2479
248028. If a filter file refered to $h_xxx or $message_headers, and the headers
2481 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2482 become corrupted.
2483
248429. When a sender address is verified, it is cached, to save repeating the test
2485 when there is more than one recipient in a message. However, when the
2486 verification involves a callout, it is possible for different callout
2487 options to be set for different recipients. It is too complicated to keep
2488 track of this in the cache, so now Exim always runs a verification when a
2489 callout is required, relying on the callout cache for the optimization.
2490 The overhead is duplication of the address routing, but this should not be
2491 too great.
2492
249330. Fixed a bug in callout caching. If a RCPT command caused the sender address
2494 to be verified with callout=postmaster, and the main callout worked but the
2495 postmaster check failed, the verification correctly failed. However, if a
2496 subsequent RCPT command asked for sender verification *without* the
2497 postmaster check, incorrect caching caused this verification also to fail,
2498 incorrectly.
2499
250031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2501 it was not caching the DNS options (qualify_single, search_parents) that
2502 were used when the lookup failed. A subsequent lookup with different
2503 options therefore always gave the same answer, though there were cases
2504 where it should not have. (Example: a "domains = !$mx_any" option on a
2505 dnslookup router: the "domains" option is always processed without any
2506 widening, but the router might have qualify_single set.) Now Exim uses the
2507 cached value only when the same options are set.
2508
250932. Added John Jetmore's "exipick" utility to the distribution.
2510
251133. GnuTLS: When an attempt to start a TLS session fails for any reason other
2512 than a timeout (e.g. a certificate is required, and is not provided), an
2513 Exim server now closes the connection immediately. Previously it waited for
2514 the client to close - but if the client is SSL, it seems that they each
2515 wait for each other, leading to a delay before one of them times out.
2516
251734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2518 maintained 0.8.x compatibility because I don't think many are using it, and
2519 it is clearly obsolete.
2520
252135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2522 transport.
2523
252436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2525 client certificate was expired. A simple patch fixes this, though I don't
2526 understand the full logic of why the verify callback is called multiple
2527 times.
2528
252937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2530 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2531 which causes problems with some clients (such as the Certicom SSL Plus
2532 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2533 disables the coutermeasure allowing Eudora to connect."
2534
253538. Exim was not checking that a write() to a log file succeeded. This could
2536 lead to Bad Things if a log got too big, in particular if it hit a file
2537 size limit. Exim now panics and dies if it cannot write to a log file, just
2538 as it does if it cannot open a log file.
2539
254039. Modified OS/Makefile-Linux so that it now contains
2541
2542 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2543
2544 The two -D definitions ensure that Exim is compiled with large file
2545 support, which makes it possible to handle log files that are bigger than
2546 2^31.
2547
254840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2549 instance) a domain was checked against a named list that involved a lookup,
2550 causing $domain_data to be set, then another domain was checked against the
2551 same list, then the first domain was re-checked, the value of $domain_data
2552 after the final check could be wrong. In particular, if the second check
2553 failed, it could be set empty. This bug probably also applied to
2554 $localpart_data.
2555
255641. The strip_trailing_dot option was not being applied to the address given
2557 with the -f command-line option.
2558
255942. The code for reading a message's header from the spool was incrementing
2560 $received_count, but never initializing it. This meant that the value was
2561 incorrect (doubled) while delivering a message in the same process in which
2562 it was received. In the most common configuration of Exim, this never
2563 happens - a fresh exec is done - but it can happen when
2564 deliver_drop_privilege is set.
2565
256643. When Exim logs an SMTP synchronization error - client data sent too soon -
2567 it now includes up to 150 characters of the unexpected data in the log
2568 line.
2569
257044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2571 and building data strings. The size of both of these buffers was 10 000
2572 bytes - far larger than anybody would *ever* want, thought I. Needless to
2573 say, somebody hit the limit. I have increased the maximum line length to
2574 20 000 and the maximum data length of concatenated lines to 100 000. I have
2575 also fixed two bugs, because there was no checking on these buffers. Tsk,
2576 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2577 buffer is too small.
2578
257945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2580 lsearch lookups. Now it does.
2581
258246. When parsing a route_list item in a manualroute router, a fixed-length
2583 buffer was used for the list of hosts. I made this 1024 bytes long,
2584 thinking that nobody would ever have a list of hosts that long. Wrong.
2585 Somebody had a whole pile of complicated expansion conditions, and the
2586 string was silently truncated, leading to an expansion error. It turns out
2587 that it is easier to change to an unlimited length (owing to other changes
2588 that have happened since this code was originally written) than to build
2589 structure for giving a limitation error. The length of the item that
2590 expands into the list of hosts is now unlimited.
2591
259247. The lsearch lookup could not handle data where the length of text line was
2593 more than 4095 characters. Such lines were truncated, leading to shortened
2594 data being returned. It should now handle lines of any length.
2595
259648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2597 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2598 ACL").
2599
260049. Cosmetic tidy to scripts like exicyclog that are generated by globally
2601 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2602 no longer happens in comment lines. A list of replacements is now placed
2603 at the head of all of the source files, except those whose only change is
2604 to replace PERL_COMMAND in the very first #! line.
2605
260650. Replaced the slow insertion sort in queue.c, for sorting the list of
2607 messages on the queue, with a bottom-up merge sort, using code contributed
2608 by Michael Haardt. This should make operations like -bp somewhat faster on
2609 large queues. It won't affect queue runners, except when queue_run_in_order
2610 is set.
2611
261251. Installed eximstats 1.31 in the distribution.
2613
261452. Added support for SRV lookups to the dnslookup router.
2615
261653. If an ACL referred to $message_body or $message_body_end, the value was not
2617 reset for any messages that followed in the same SMTP session.
2618
261954. The store-handling optimization for building very long strings was not
2620 differentiating between the different store pools. I don't think this
2621 actually made any difference in practice, but I've tidied it.
2622
262355. While running the routers to verify a sender address, $sender_address
2624 was still set to the sender address. This is wrong, because when routing to
2625 send a bounce to the sender, it would be empty. Therefore, I have changed
2626 it so that, while verifying a sender address, $sender_address is set to <>.
2627 (There is no change to what happens when verifying a recipient address.)
2628
262956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2630 target A or AAAA records (if not already returned) without resetting the
2631 qualify_single or search_parents options of the DNS resolver. These are
2632 inappropriate in this case because the targets of MX and SRV records must
2633 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2634 target that, when qualified, matched something in the local domain. These
2635 two options are now turned off when doing these lookups.
2636
263757. It seems that at least some releases of Reiserfs (which does not have the
2638 concept of a fixed number of inodes) returns zero and not -1 for the
2639 number of available inodes. This interacted badly with check_spool_inodes,
2640 which assumed that -1 was the "no such thing" setting. What I have done is
2641 to check that the total number of inodes is greater than zero before doing
2642 the test of how many are available.
2643
264458. When a "warn" ACL statement has a log_message modifier, the message is
2645 remembered, and not repeated. This is to avoid a lot of repetition when a
2646 message has many recipients that cause the same warning to be written.
2647 Howewer, Exim was preserving the list of already written lines for an
2648 entire SMTP session, which doesn't seem right. The memory is now reset if a
2649 new message is started.
2650
265159. The "rewrite" debugging flag was not showing the result of rewriting in the
2652 debugging output unless log_rewrite was also set.
2653
265460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2655 of (int)(handle) when we know that handle contains (void *)(-1).
2656
265761. The Exim daemon panic-logs an error return when it closes the incoming
2658 connection. However "connection reset by peer" seems to be common, and
2659 isn't really an error worthy of noting specially, so that particular error
2660 is no long logged.
2661
266262. When Exim is trying to find all the local interfaces, it used to panic and
2663 die if the ioctl to get the interface flags failed. However, it seems that
2664 on at least one OS (Solaris 9) it is possible to have an interface that is
2665 included in the list of interfaces, but for which you get a failure error
2666 for this call. This happens when the interface is not "plumbed" into a
2667 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2668 failure of the "get flags" call assumes that the interface is down.
2669
267063. Added a ${eval10: operator, which assumes all numbers are decimal. This
2671 makes life easier for people who are doing arithmetic on fields extracted
2672 from dates, where you often get leading zeros that should not be
2673 interpreted as octal.
2674
267564. Added qualify_domain to the redirect router, to override the global
2676 setting.
2677
267865. If a pathologically long header line contained very many addresses (the
2679 report of this problem mentioned 10 000) and each of them was rewritten,
2680 Exim could use up a very large amount of memory. (It kept on making new
2681 copies of the header line as it rewrote, and never released the old ones.)
2682 At the expense of a bit more processing, the header rewriting function has
2683 been changed so that it no longer eats memory in this way.
2684
268566. The generation of the Received: header has been moved from the time that a
2686 message starts to be received, to the time that it finishes. The timestamp
2687 in the Received: header should now be very close to that of the <= log
2688 line. There are two side-effects of this change:
2689
2690 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2691 logged header lines no longer include the local Received: line, because
2692 it has not yet been created. The same applies to a copy of the message
2693 that is returned to a non-SMTP sender when a message is rejected.
2694
2695 (b) When a filter file is tested using -bf, no additional Received: header
2696 is added to the test message. After some thought, I decided that this
2697 is a bug fix.
2698
2699 This change does not affect the value of $received_for. It is still set
2700 after address rewriting, but before local_scan() is called.
2701
270267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2703
270468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2705 gave an unhelpful panic error message, and a defer error. I have managed to
2706 change this behaviour so that it now rejects any supplied certificate,
2707 which seems right, as the list of acceptable certificates is empty.
2708
270969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2710 gave an unhelpful defer error. I have not managed to make this reject any
2711 supplied certificates, but the error message it gives is "no certificate
2712 supplied", which is not helpful.
2713
271470. exigrep's output now also includes lines that are not associated with any
2715 message, but which match the given pattern. Implemented by a patch from
2716 Martin Sluka, which also tidied up the Perl a bit.
2717
271871. Recipient callout verification, like sender verification, was using <> in
2719 the MAIL FROM command. This isn't really the right thing, since the actual
2720 sender may affect whether the remote host accepts the recipient or not. I
2721 have changed it to use the actual sender in the callout; this means that
2722 the cache record is now keyed on a recipient/sender pair, not just the
2723 recipient address. There doesn't seem to be a real danger of callout loops,
2724 since a callout by the remote host to check the sender would use <>.
2725 [SEE ABOVE: changed after hitting problems.]
2726
272772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2728 temporary errors. However, in the case of such a code being given after
2729 the end of a data transmission (i.e. after ".") Exim was failing to write
2730 a retry record for the message. (Yes, there was some broken host that was
2731 actually sending 8xx at this point.)
2732
273373. An unknown lookup type in a host list could cause Exim to panic-die when
2734 the list was checked. (An example that provoked this was putting <; in the
2735 middle of a list instead of at the start.) If this happened during a DATA
2736 ACL check, a -D file could be left lying around. This kind of configuration
2737 error no longer causes Exim to die; instead it causes a defer errror. The
2738 incident is still logged to the main and panic logs.
2739
274074. Buglet left over from Exim 3 conversion. The message "too many messages
2741 in one connection" was written to the rejectlog but not the mainlog, except
2742 when address rewriting (yes!) was being logged.
2743
274475. Added write_rejectlog option.
2745
274676. When a system filter was run not as root (that is, when system_filter_user
2747 was set), the values of the $n variables were not being returned to the
2748 main process; thus, they were not subsequently available in the $sn
2749 variables.
2750
275177. Added +return_path_on_delivery log selector.
2752
275378. A connection timeout was being treated differently from recipients deferred
2754 when testing hosts_max_try with a message that was older than the host's
2755 retry timeout. (The host should not be counted, thus allowing all hosts to
2756 be tried at least once before bouncing.) This may have been the cause of an
2757 occasionally reported bug whereby a message would remain on the queue
2758 longer than the retry timeout, but would be bounced if a delivery was
2759 forced. I say "may" because I never totally pinned down the problem;
2760 setting up timeout/retry tests is difficult. See also the next item.
2761
276279. The ultimate address timeout was not being applied to errors that involved
2763 a combination of host plus message (for example, a timeout on a MAIL
2764 command). When an address resolved to a number of possible hosts, and they
2765 were not all tried for each delivery (e.g. because of hosts_max_try), a
2766 message could remain on the queue longer than the retry timeout.
2767
276880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2769 Haardt.
2770
277181. Fixed an obscure SMTP outgoing bug which required at least the following
2772 conditions: (a) there was another message waiting for the same server;
2773 (b) the server returned 5xx to all RCPT commands in the first message so
2774 that the message was not completed; (c) the server dropped the connection
2775 or gave a negative response to the RSET that Exim sends to abort the
2776 transaction. The observed case was a dropped connection after DATA that had
2777 been sent in pipelining mode. That is, the server had advertised PIPELINING
2778 but was not implementing it correctly. The effect of the bug was incorrect
2779 behaviour, such as trying another host, and this could lead to a crash.
2780
2781
2782Exim version 4.30
2783-----------------
2784
2785 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2786 and daemon.c were passed as pointers to ints; they should have been
2787 pointers to socklen_t variables (which are typically unsigned ints).
2788
2789 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2790 fixed.
2791
2792 3. Fixed a really odd bug that affected only the testing scheme; patching a
2793 certain fixed string in the binary changed the value of another string that
2794 happened to be identical to the end of the original first string.
2795
2796 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2797 name", it returns that address as the IP address. On some operating
2798 systems (e.g. Solaris), it also passes back the IP address string as the
2799 "host name". However, on others (e.g. Linux), it passes back an empty
2800 string. Exim wasn't checking for this, and was changing the host name to an
2801 empty string, assuming it had been canonicized.
2802
2803 5. Although rare, it is permitted to have more than one PTR record for a given
2804 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2805 all the names associated with an address, because they do in Solaris.
2806 However, it seems that they do not in Linux for data that comes from the
2807 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2808 I found this out when I moved to a new Linux workstation and tried to run
2809 the Exim test suite.
2810
2811 To get round this problem I have changed the code so that it now does its
2812 own call to the DNS to look up PTR records when searching for a host name.
2813 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2814 addresses that are only in /etc/hosts are still found.
2815
2816 This behaviour is, however, controlled by an option called host_lookup_
2817 order, which defaults to "bydns:byaddr". If people want to use the other
2818 order, or indeed, just use one or the other means of lookup, they can
2819 specify it in this variable.
2820
2821 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2822 some operating systems, this comes back from gethostbyaddr() as an empty
2823 string, and this is what Exim used to test for. However, it seems that in
2824 other systems, "." is yielded. Exim now tests for this case too.
2825
2826 7. The values of check_spool_space and check_log_space are now held internally
2827 as a number of kilobytes instead of an absolute number of bytes. If a
2828 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2829 kilobyte. This means that much larger values can be stored.
2830
2831 8. Exim monitor: an attempt to get the action menu when not actually pointing
2832 at a message produces an empty menu entitled "No message selected". This
2833 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2834 no entries in it ("Shell widget menu has zero width and/or height"). So I
2835 have added a single, blank menu entry in this case.
2836
2837 9. Added ${quote_local_part.
2838
283910. MIME decoding is now applied to the contents of Subject: header lines when
2840 they are logged.
2841
284211. Now that a reference to $sender_host_address automatically causes a reverse
2843 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2844 host lookup before query-style lookups in lists that might use this
2845 variable. This has therefore been abolished, and the "net-" prefix is no
2846 longer necessary for query-style lookups.
2847
284812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2849 have been a typo for LFLAGS, so it has been changed.
2850
285113. The install script calls Exim with "-C /dev/null" in order to find the
2852 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2853 to be output. Howeve, since Exim outputs its version number before the
2854 error, it didn't break the script. It just looked ugly. I fixed this by
2855 always allowing "-C /dev/null" if the caller is root.
2856
285714. Ignore overlarge ACL variable number when reading spool file - insurance
2858 against a later release with more variables having written the file.
2859
286015. The standard form for an IPv6 address literal was being rejected by EHLO.
2861 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2862 this, as well as the form without the "IPv6" on the front.
2863
286416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2865 OS/Makefile-Darwin file.
2866
286717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2868 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2869
287018. After change 4.21/52, "%ld" was used to format the contents of the $inode
2871 variable. However, some OS use ints for inodes. I've added cast to long int
2872 to get rid of the compiler warning.
2873
287419. I had forgotten to lock out "/../" in configuration file names when
2875 ALT_CONFIG_PREFIX was set.
2876
287720. Routers used for verification do not need to specify transports. However,
2878 if such a router generated a host list, and callout was configured, Exim
2879 crashed, because it could not find a port number from the (non-existent)
2880 transport. It now assumes port 25 in this circumstance.
2881
288221. Added the -t option to exigrep.
2883
288422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2885 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2886 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2887 them is set, LOOKUP_LSEARCH is forced.
2888
288923. "exim -bV" now outputs a list of lookups that are included in the binary.
2890
289124. Added sender and host information to the "rejected by local_scan()" log
2892 line; previously there was no indication of these.
2893
289425. Added .include_if_exists.
2895
289626. Change 3.952/11 added an explicit directory sync on top of a file sync for
2897 Linux. It turns out that not all file systems support this. Apparently some
2898 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2899 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2900 not supported on the file descriptor, is now ignored when Exim is trying to
2901 sync a directory. This applies only to Linux.
2902
290327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2904
290528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2906 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2907 this.
2908
290929. Added support for maildirsize files from supplied patch (modified a bit).
2910
291130. The use of :fail: followed by an empty string could lead Exim to respond to
2912 sender verification failures with (e.g.):
2913
2914 550 Verification failed for <xxx>
2915 550 Sender verify failed
2916
2917 where the first response line was missing the '-' that indicates it is not
2918 the final line of the response.
2919
292031. The loop for finding the name of the user that called Exim had a hardwired
2921 limit of 10; it now uses the value of finduser_retries, which is used for
2922 all other user lookups.
2923
292432. Added $received_count variable, available in data and not_smtp ACLs, and at
2925 delivery time.
2926
292733. Exim was neglecting to zero errno before one call of strtol() when
2928 expanding a string and expecting an integer value. On some systems this
2929 resulted in spurious "integer overflow" errors. Also, it was casting the
2930 result into an int without checking.
2931
293234. Testing for a connection timeout using "timeout_connect" in the retry rules
2933 did not work. The code looks as if it has *never* worked, though it appears
2934 to have been documented since at least releast 1.62. I have made it work.
2935
293635. The "timeout_DNS" error in retry rules, also documented since at least
2937 1.62, also never worked. As it isn't clear exactly what this means, and
2938 clearly it isn't a major issue, I have abolished the feature by treating it
2939 as "timeout", and writing a warning to the main and panic logs.
2940
294136. The display of retry rules for -brt wasn't always showing the error code
2942 correctly.
2943
294437. Added new error conditions to retry rules: timeout_A, timeout_MX,
2945 timeout_connect_A, timeout_connect_MX.
2946
294738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2948 to the empty sender.
2949
295039. The daemon was not analysing the content of -oX till after it had closed
2951 stderr and disconnected from the controlling terminal. This meant that any
2952 syntax errors were only noted on the panic log, and the return code from
2953 the command was 0. By re-arranging the code a little, I've made the
2954 decoding happen first, so such errors now appear on stderr, and the return
2955 code is 1. However, the actual setting up of the sockets still happens in
2956 the disconnected process, so errors there are still only recorded on the
2957 panic log.
2958
295940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2960 connections (as happens on some IP stacks) was logged at start up time as
2961 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2962 it from "IPv6 and IPv4", which means that two separate sockets are being
2963 used.
2964
296541. The debug output for gethostbyname2() or getipnodebyname() failures now
2966 says whether AF_INET or AF_INET6 was passed as an argument.
2967
296842. Exiwhat output was messed up when time zones were included in log
2969 timestamps.
2970
297143. Exiwhat now gives more information about the daemon's listening ports,
2972 and whether -tls-on-connect was used.
2973
297444. The "port" option of the smtp transport is now expanded.
2975
297645. A "message" modifier in a "warn" statement in a non-message ACL was being
2977 silently ignored. Now an error message is written to the main and panic
2978 logs.
2979
298046. There's a new ACL modifier called "logwrite" which writes to a log file
2981 as soon as it is encountered.
2982
298347. Added $local_user_uid and $local_user_gid at routing time.
2984
298548. Exim crashed when trying to verify a sender address that was being
2986 rewritten to "<>".
2987
298849. Exim was recognizing only a space character after ".include". It now also
2989 recognizes a tab character.
2990
299150. Fixed several bugs in the Perl script that creates the exim.8 man page by
2992 extracting the relevant information from the specification. The man page no
2993 longer contains scrambled data for the -d option, and I've added a section
2994 at the front about calling Exim under different names.
2995
299651. Added "extra_headers" argument to the "mail" command in filter files.
2997
299852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2999 crash.
3000
300153. Installed eximstats 1.29.
3002
300354. Added transport_filter_timeout as a generic transport option.
3004
300555. Exim no longer adds an empty Bcc: header to messages that have no To: or
3006 Cc: header lines. This was required by RFC 822, but it not required by RFC
3007 2822.
3008
300956. Exim used to add From:, Date:, and Message-Id: header lines to any
3010 incoming messages that did not have them. Now it does so only if the
3011 message originates locally, that is, if there is no associated remote host
3012 address. When Resent- header lines are present, this applies to the Resent-
3013 lines rather than the non-Resent- lines.
3014
301557. Drop incoming SMTP connection after too many syntax or protocol errors. The
3016 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3017
301858. Messages for configuration errors now include the name of the main
3019 configuration file - useful now that there may be more than one file in a
3020 list (.included file names were always shown).
3021
302259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3023 for those rare installations that do not start the daemon as root or run it
3024 setuid root. I've cut out the call to initgroups() if the daemon is not
3025 root at that time.
3026
302760. The Exim user and group can now be bound into the binary as text strings
3028 that are looked up at the start of Exim's processing.
3029
303061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3031
303262. Added $mailstore_basename variable.
3033
303463. Installed patch to sieve.c from Michael Haardt.
3035
303664. When Exim failed to open the panic log after failing to open the main log,
3037 the original message it was trying to log was written to stderr and debug
3038 output, but if they were not available (the usual case in production), it
3039 was lost. Now it is written to syslog before the two lines that record the
3040 failures to open the logs.
3041
304265. Users' Exim filters run in subprocesses under the user's uid. It is
3043 possible for a "deliver" command or an alias in a "personal" command to
3044 provoke an address rewrite. If logging of address rewriting is configured,
3045 this fails because the process is not running as root or exim. There may be
3046 a better way of dealing with this, but for the moment (because 4.30 needs
3047 to be released), I have disabled address rewrite logging when running a
3048 filter in a non-root, non-exim process.
3049
3050
3051Exim version 4.24
3052-----------------
3053
3054 1. The buildconfig auxiliary program wasn't quoting the value set for
3055 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3056 not defined. This bug was masked in 4.22 by the effect that was fixed in
3057 change 4.23/1.
3058
3059 2. Some messages that were rejected after a message id was allocated were
3060 shown as "incomplete" by exigrep. It no longer does this for messages that
3061 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3062
3063 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3064 have allow_domain_literals set, the ID did not get logged in the <= line.
3065 Domain literals are now always recognized in Message-ID: header lines.
3066
3067 4. The first argument for a ${extract expansion item is the key name or field
3068 number. Leading and trailing spaces in this item were not being ignored,
3069 causing some misleading effects.
3070
3071 5. When deliver_drop_privilege was set, single queue runner processes started
3072 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3073 same command in the process it spins off) were not dropping privilege.
3074
3075 6. When the daemon running as "exim" started a queue runner, it always
3076 re-executed Exim in the spun-off process. This is a waste of effort when
3077 deliver_drop_privilege is set. The new process now just calls the
3078 queue-runner function directly.
3079
3080
3081Exim version 4.23
3082-----------------
3083
3084 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3085 HEADERS_CHARSET.
3086
3087 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3088 ignored. Though the use of -oP was forcing the writing of a pid file, it
3089 was always written to the default place.
3090
3091 3. If the message "no IP address found for host xxxx" is generated during
3092 incoming verification, it is now followed by identification of the incoming
3093 connection (so you can more easily find what provoked it).
3094
3095 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3096
3097 5. Added some features to "harden" Exim a bit more against certain attacks:
3098
3099 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3100 be put in Local/Makefile. This is like the never_users runtime option,
3101 but it cannot be overridden. The default setting is "root".
3102
3103 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3104 prefix string with which any file named in a -C command line option
3105 must start.
3106
3107 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3108 is retained for -C and -D only if the caller of Exim is root. Without
3109 it, the exim user may also use -C and -D and retain privilege.
3110
3111 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3112 command line option is disabled.
3113
3114 6. Macro names set by the -D option must start with an upper case letter, just
3115 like macro names defined in the configuration file.
3116
3117 7. Added "dereference=" facility to LDAP.
3118
3119 8. Two instances of the typo "uknown" in the source files are fixed.
3120
3121 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3122 the Configure-Makefile script screwed up while processing it.
3123
312410. Incorporated PCRE 4.4.
3125
312611. The SMTP synchronization check was not operating right at the start of an
3127 SMTP session. For example, it could not catch a HELO sent before the client
3128 waited for the greeting. There is now a check for outstanding input at the
3129 point when the greeting is written. Because of the duplex, asynchronous
3130 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3131 way, but not yet received, when the check is performed.
3132
313312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3134 on TCP/IP sockets, because this apparently causes some broken clients to
3135 timeout.
3136
313713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3138 unchanged) from the Cygwin maintainer.
3139
314014. The code for -bV that shows what is in the binary showed "mbx" when maildir
3141 was supported instead of testing for mbx. Effectively a typo.
3142
314315. The spa authenticator server code was not checking that the input it
3144 received was valid base64.
3145
314616. The debug output line for the "set" modifier in ACLs was not showing the
3147 name of the variable that was being set.
3148
314917. Code tidy: the variable type "vtype_string" was never used. Removed it.
3150
315118. Previously, a reference to $sender_host_name did not cause a DNS reverse
3152 lookup on its own. Something else was needed to trigger the lookup. For
3153 example, a match in host_lookup or the need for a host name in a host list.
3154 Now, if $sender_host_name is referenced and the host name has not yet been
3155 looked up, a lookup is performed. If the lookup fails, the variable remains
3156 empty, and $host_lookup_failed is set to "1".
3157
315819. Added "eqi" as a case-independent comparison operator.
3159
316020. The saslauthd authentication condition could segfault if neither service
3161 nor realm was specified.
3162
316321. If an overflowing value such as "2048M" was set for message_size_limit, the
3164 error message that was logged was misleading, and incoming SMTP
3165 connections were dropped. The message is now more accurate, and temporary
3166 errors are given to SMTP connections.
3167
316822. In some error situations (such as 21 above) Exim rejects all SMTP commands
3169 (except RSET) with a 421 error, until QUIT is received. However, it was
3170 failing to send a response to QUIT.
3171
317223. The HELO ACL was being run before the code for helo_try_verify_hosts,
3173 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3174 ACL is now run after the helo_try_verify_hosts code.
3175
317624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3177 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3178 case-independent, so other case variants are also recognized). Apparently
3179 some systems use these upper case variants.
3180
318125. If more than two messages were waiting for the same host, and a transport
3182 filter was specified for the transport, Exim sent two messages over the
3183 same TCP/IP connection, and then failed with "socket operation on non-
3184 socket" when it tried to send the third.
3185
318626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3187
318827. The extern definition of crypt16() in expand.c was not being excluded when
3189 the OS had its own crypt16() function.
3190
319128. Added bounce_return_body as a new option, and bounce_return_size_limit
3192 as a preferred synonym for return_size_limit, both as an option and as an
3193 expansion variable.
3194
319529. Added LIBS=-liconv to OS/Makefile-OSF1.
3196
319730. Changed the default configuration ACL to relax the local part checking rule
3198 for addresses that are not in any local domains. For these addresses,
3199 slashes and pipe symbols are allowed within local parts, but the sequence
3200 /../ is explicitly forbidden.
3201
320231. SPA server authentication was not clearing the challenge buffer before
3203 using it.
3204
320532. log_message in a "warn" ACL statement was writing to the reject log as
3206 well as to the main log, which contradicts the documentation and doesn't
3207 seem right (because no rejection is happening). So I have stopped it.
3208
320933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3210 However, I am unable to do any testing of this.
3211
321234. Fixed an infelicity in the appendfile transport. When checking directories
3213 for a mailbox, to see if any needed to be created, it was accidentally
3214 using path names with one or more superfluous leading slashes; tracing
3215 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3216
321735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3218 contents are added to the log line that is written for every discarded
3219 recipient. (Previously a log_message setting was ignored.)
3220
322136. The ${quote: operator now quotes the string if it is empty.
3222
322337. The install script runs exim in order to find its version number. If for
3224 some reason other than non-existence or emptiness, which it checks, it
3225 could not run './exim', it was installing it with an empty version number,
3226 i.e. as "exim-". This error state is now caught, and the installation is
3227 aborted.
3228
322938. An argument was missing from the function that creates an error message
3230 when Exim fails to connect to the socket for saslauthd authentication.
3231 This could cause Exim to crash, or give a corrupted message.
3232
323339. Added isip, isip4, and isip6 to ${if conditions.
3234
323540. The ACL variables $acl_xx are now saved with the message, and can be
3236 accessed later in routers, transports, and filters.
3237
323841. The new lookup type nwildlsearch is like wildlsearch, except that the key
3239 strings in the file are not string-expanded.
3240
324142. If a MAIL command specified a SIZE value that was too large to fit into an
3242 int variable, the check against message_size_limit failed. Such values are
3243 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3244 day this will have to be increased, but I don't think I want to be around
3245 when emails are that large.
3246
3247
3248
3249Exim version 4.22
3250-----------------
3251
3252 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3253 iconv() is not standard in FreeBSD.
3254
3255 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3256 IPv6 enabled. The observed symptom was a segmentation fault on return from
3257 the function os_common_find_running_interfaces() in src/os.c.
3258
3259 3. In the check_special_case() function in daemon.c I had used "errno" as an
3260 argument name, which causes warnings on some systems. This was basically a
3261 typo, since it was named "eno" in the comments!
3262
3263 4. The code that waits for the clock to tick (at a resolution of some fraction
3264 of a second) so as to ensure message-id uniqueness was always waiting for
3265 at least one whole tick, when it could have waited for less. [This is
3266 almost certainly not relevant at current processor speeds, where it is
3267 unlikely to ever wait at all. But we try to future-proof.]
3268
3269 5. The function that sleeps for a time interval that includes fractions of a
3270 second contained a race. It did not block SIGALRM between setting the
3271 timer, and suspending (a couple of lines later). If the interval was short
3272 and the sigsuspend() was delayed until after it had expired, the suspension
3273 never ended. On busy systems this could lead to processes getting stuck for
3274 ever.
3275
3276 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3277 process, before it forks any delivery processes. The open lookup caching
3278 mechanism meant that the open file or database connection was passed into
3279 the delivery process. The problem was that delivery processes always tidy
3280 up cached lookup data. This could cause a problem for the next delivery
3281 process started by the queue runner, because the external queue runner
3282 process does not know about the closure. So the next delivery process
3283 still has data in the lookup cache. In the case of a file lookup, there was
3284 no problem because closing a file descriptor in a subprocess doesn't affect
3285 the parent. However, if the lookup was caching a connection to a database,
3286 the connection was closed, and the second delivery process was likely to
3287 see errors such as "PGSQL: query failed: server closed the connection
3288 unexpectedly". The problem has been fixed by closing all cached lookups
3289 in a queue runner before running a delivery process.
3290
3291 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3292 seem to have the "const" qualifier which it has on other OS. I've
3293 parameterised it.
3294
3295 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3296 *of the same type* (client or server) with the same public name that an
3297 error should be diagnosed.
3298
3299 9. When Exim looked up a host name for an IP address, but failed to find the
3300 original IP address when looking up the host name (a safety check), it
3301 output the message "<ip address> does not match any IP for NULL", which was
3302 confusing, to say the least. The bug was that the host name should have
3303 appeared instead of "NULL".
3304
330510. Since release 3.03, if Exim is called by a uid other than root or the Exim
3306 user that is built into the binary, and the -C or -D options is used, root
3307 privilege is dropped before the configuration file is read. In addition,
3308 logging is switched to stderr instead of the normal log files. If the
3309 configuration then re-defines the Exim user, the unprivileged environment
3310 is probably not what is expected, so Exim logs a panic warning message (but
3311 proceeds).
3312
3313 However, if deliver_drop_privilege is set, the unprivileged state may well
3314 be exactly what is intended, so the warning has been cut out in that case,
3315 and Exim is allowed to try to write to its normal log files.
3316
3317
3318Exim version 4.21
3319-----------------
3320
3321 1. smtp_return_error_details was not giving details for temporary sender
3322 or receiver verification errors.
3323
3324 2. Diagnose a configuration error if two authenticators have the same public
3325 name.
3326
3327 3. Exim used not to create the message log file for a message until the first
3328 delivery attempt. This could be confusing when incoming messages were held
3329 for policy or load reasons. The message log file is now created at the time
3330 the message is received, and an initial "Received" line is written to it.
3331
3332 4. The automatically generated man page for command line options had a minor
3333 bug that caused no ill effects; however, a more serious problem was that
3334 the procedure for building the man page automatically didn't always
3335 operate. Consequently, release 4.20 contains an out-of-date version. This
3336 shouldn't happen again.
3337
3338 5. When building Exim with embedded Perl support, the script that builds the
3339 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3340 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3341
3342 6. The freeze_tell option was not being used for messages that were frozen on
3343 arrival, either by an ACL or by local_scan().
3344
3345 7. Added the smtp_incomplete_transaction log selector.
3346
3347 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3348 was accepting AUTH without a new EHLO.
3349
3350 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3351 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3352 RFC.
3353
335410. Logging of TCP/IP connections (when configured) now happens in the main
3355 daemon process instead of the child process, so that the TCP/IP connection
3356 count is more accurate (but it can never be perfect).
3357
335811. The use of "drop" in a nested ACL was not being handled correctly in the
3359 outer ACL. Now, if condition failure induced by the nested "drop" causes
3360 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3361 or "require"), the connection is dropped.
3362
336312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3364 that yield "discard" can now be used with an "accept" or a "discard" verb,
3365 but an error is generated for any others (because I can't see a useful way
3366 to define what should happen).
3367
336813. When an ACL is read dynamically from a file (or anywhere else), the lines
3369 are now processed in the same way as lines in the Exim configuration file.
3370 In particular, continuation lines are supported.
3371
337214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3373
337415. Added -ti meaning -t -i.
3375
337616. Check for letters, digits, hyphens, and dots in the names of dnslist
3377 domains, and warn by logging if others are found.
3378
337917. At least on BSD, alignment is not guarenteed for the array of ifreq's
3380 returned from GIFCONF when Exim is trying to find the list of interfaces on
3381 a host. The code in os.c has been modified to copy each ifreq to an aligned
3382 structure in all cases.
3383
3384 Also, in some cases, the returned ifreq's were being copied to a 'struct
3385 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3386 means the last couple of bytes of an IPv6 address could be chopped if the
3387 ifreq contained only a normal sockaddr (14 bytes storage).
3388
338918. Named domain lists were not supported in the hosts_treat_as_local option.
3390 An entry such as +xxxx was not recognized, and was treated as a literal
3391 domain name.
3392
339319. Ensure that header lines added by a DATA ACL are included in the reject log
3394 if the ACL subsequently rejects the message.
3395
339620. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3397 MD5 (which is deprecated).
3398
339921. When testing a filter file using -bf, Exim was writing a message when it
3400 took the sender from a "From " line in the message, but it was not doing so
3401 when it took $return_path from a Return-Path: header line. It now does.
3402
340322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3404 with a valid header line field name (a series of printing characters
3405 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3406
340723. Changed "disc" in the source to "disk" to conform to the documentation and
3408 the book and for uniformity.
3409
341024. Ignore Sendmail's -Ooption=value command line item.
3411
341225. When execve() failed while trying to run a command in a pipe transport,
3413 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3414 could be confused with a return value of 69 from the command itself. This
3415 has been changed to 127, the value the shell returns if it is asked to run
3416 a non-existent command. The wording for the related log line suggests a
3417 non-existent command as the problem.
3418
341926. If received_header_text expands to an empty string, do not add a Received:
3420 header line to the message. (Well, it adds a token one on the spool, but
3421 marks it "old" so that it doesn't get used or transmitted.)
3422
342327. Installed eximstats 1.28 (addition of -nt option).
3424
342528. There was no check for failure on the call to getsockname() in the daemon
3426 code. This can fail if there is a shortage of resources on the system, with
3427 ENOMEM, for example. A temporary error is now given on failure.
3428
342929. Contrary to the C standard, it seems that in some environments, the
3430 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3431 program. Exim now does this explicitly; it affects the formatting of
3432 timestamps using strftime().
3433
343430. If exiqsumm was given junk data, it threw up some uninitialized variable
3435 complaints. I've now initialized all the variables, to avoid this.
3436
343732. Header lines added by a system filter were not being "seen" during
3438 transport-time rewrites.
3439
344033. The info_callback() function passed to OpenSSL is set up with type void
3441 (*)(SSL *, int, int), as described somewhere. However, when calling the
3442 function (actually a macro) that sets it up, the type void(*)() is
3443 expected. I've put in a cast to prevent warnings from picky compilers.
3444
344534. If a DNS black list lookup found a CNAME record, but there were no A
3446 records associated with the domain it pointed at, Exim crashed.
3447
344835. If a DNS black list lookup returned more than one A record, Exim ignored
3449 all but the first. It now scans all returned addresses if a particular IP
3450 value is being sought. In this situation, the contents of the
3451 $dnslist_value variable are a list of all the addresses, separated by a
3452 comma and a space.
3453
345436. Tightened up the rules for host name lookups using reverse DNS. Exim used
3455 to accept a host name and all its aliases if the forward lookup for any of
3456 them yielded the IP address of the incoming connection. Now it accepts only
3457 those names whose forward lookup yields the correct IP address. Any other
3458 names are discarded. This closes a loophole whereby a rogue DNS
3459 administrator could create reverse DNS records to break through a
3460 wildcarded host restriction in an ACL.
3461
346237. If a user filter or a system filter that ran in a subprocess used any of
3463 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3464 the wrong values were passed to the pipe command ($thisaddress had the
3465 value of $0, $0 had the value of $1, etc). This bug was introduced by
3466 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3467
346838. Improved the line breaking for long SMTP error messages from ACLs.
3469 Previously, if there was no break point between 40 and 75 characters, Exim
3470 left the rest of the message alone. Two changes have been made: (a) I've
3471 reduced the minimum length to 35 characters; (b) if it can't find a break
3472 point between 35 and 75 characters, it looks ahead and uses the first one
3473 that it finds. This may give the occasional overlong line, but at least the
3474 remaining text gets split now.
3475
347639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3477 file descriptors might be low, and that setting 1000 would always raise it.
3478 It turns out that in some environments, the limit is already over 1000 and
3479 that lowering it causes trouble. So now Exim takes care not to decrease it.
3480
348140. When delivering a message, the value of $return_path is set to $sender_
3482 address at the start of routing (routers may change the value). By an
3483 oversight, this default was not being set up when an address was tested by
3484 -bt or -bv, which affected the outcome if any router or filter referred to
3485 $return_path.
3486
348741. The idea of the "warn" ACL verb is that it adds a header or writes to the
3488 log only when "message" or "log_message" are set. However, if one of the
3489 conditions was an address verification, or a call to a nested ACL, the
3490 messages generated by the underlying test were being passed through. This
3491 no longer happens. The underlying message is available in $acl_verify_
3492 message for both "message" and "log_message" expansions, so it can be
3493 passed through if needed.
3494
349542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3496 new expansion $bh_ to give the encoded byte string without charset
3497 translation. Translation happens only if iconv() is available; HAVE_ICONV
3498 indicates this at build time. HEADERS_CHARSET gives the charset to
3499 translate to; headers_charset can change it in the configuration, and
3500 "headers charset" can change it in an individual filter file.
3501
350243. Now that we have a default RFC 2047 charset (see above), the code in Exim
3503 that creates RFC 2047 encoded "words" labels them as that charset instead
3504 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3505 expansion operator; (ii) when Exim creates a From: line for a local
3506 message; (iii) when a header line is rewritten to include a "phrase" part.
3507
350844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3509 buggy, causing it to skip the first lines of messages whose message ID
3510 ended in 'D'. This would not have bitten before Exim release 4.14, because
3511 message IDs were unlikely to end in 'D' before then. The effect was to have
3512 incorrect size information for certain domains.
3513
351445. #include "config.h" was missing at the start of the crypt16.c module. This
3515 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3516 noticed.
3517
351846. If there was a timeout during a "random" callout check, Exim treated it as
3519 a failure of the random address, and carried on sending RSET and the real
3520 address. If the delay was just some slowness somewhere, the response to the
3521 original RCPT would be taken as a response to RSET and so on, causing
3522 mayhem of various kinds.
3523
352447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3525 when I implemented it. It didn't allow for the fact that some option values
3526 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3527 the right test for positive values.
3528
352948. Domain names in DNS records are case-independent. Exim always looks them up
3530 in lower case. Some resolvers return domain names in exactly the case they
3531 appear in the zone file, that is, they may contain uppercase letters. Not
3532 all resolvers do this - some return always lower case. Exim was treating a
3533 change of case by a resolver as a change of domain, similar to a widening
3534 of a domain abbreviation. This triggered its re-routing code and so it was
3535 trying to route what was effectively the same domain again. This normally
3536 caused routing to fail (because the router wouldn't handle the domain
3537 twice). Now Exim checks for this case specially, and just changes the
3538 casing of the domain that it ultimately uses when it transmits the message
3539 envelope.
3540
354149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3542 module.
3543
354450. If a filter generated a file delivery with a non-absolute name (possible if
3545 no home directory exists for the router), the forbid_file option was not
3546 forbidding it.
3547
354851. Added '&' feature to dnslists, to provide bit mask matching in addition to
3549 the existing equality matching.
3550
355152. Exim was using ints instead of ino_t variables in some places where it was
3552 dealing with inode numbers.
3553
355453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3555 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3556 called TMPDIR, and if it finds it is different, it changes its value.
3557
355854. The smtp_printf() function is now made available to local_scan() so
3559 additional output lines can be written before returning. There is also an
3560 smtp_fflush() function to enable the detection of a dropped connection.
3561 The variables smtp_input and smtp_batched_input are exported to
3562 local_scan().
3563
356455. Changed the default runtime configuration: the message "Unknown user"
3565 has been removed from the ACL, and instead placed on the localuser router,
3566 using the cannot_route_message feature. This means that any verification
3567 failures that generate their own messages won't get overridden. Similarly,
3568 the "Unrouteable address" message that was in the ACL for unverifiable
3569 relay addresses has also been removed.
3570
357156. Added hosts_avoid_esmtp to the smtp transport.
3572
357357. The exicyclog script was not checking for the esoteric option
3574 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3575 will work only if exicyclog is run under the appropriate euid.
3576
357758. Following a discussion on the list, the rules by which Exim recognises line
3578 endings on incoming messages have been changed. The -dropcr and drop_cr
3579 options are now no-ops, retained only for backwards compatibility. The
3580 following line terminators are recognized: LF CRLF CR. However, special
3581 processing applies to CR:
3582
3583 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3584 nor a local message in the state where . is a terminator.
3585
3586 (ii) If a bare CR is encountered in a header line, an extra space is added
3587 after the line terminator so as not to end the header. The reasoning
3588 behind this is that bare CRs in header lines are most likely either
3589 to be mistakes, or people trying to play silly games.
3590
359159. The size of a message, as listed by "-bp" or in the Exim monitor window,
3592 was being incorrectly given as 18 bytes larger than it should have been.
3593 This is a VOB (very old bug).
3594
359560. This may never have affected anything current, but just in case it has:
3596 When the local host is found other than at the start of a list of hosts,
3597 the local host, those with the same MX, and any that follow, are discarded.
3598 When the list in question was part of a longer list of hosts, the following
3599 hosts (not currently being processed) were also being discarded. This no
3600 longer happens. I'm not sure if this situation could ever has previously
3601 arisen.
3602
360361. Added the "/MX" feature to lists of hosts in the manualroute and query
3604 program routers.
3605
360662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3607 header. This is something that is recommended in a new Internet Draft, and
3608 is something that is documented as being done by Sendmail. There are two
3609 possible values. For messages generated by the autoreply transport, Exim
3610 adds:
3611
3612 Auto-Submitted: auto-replied
3613
3614 whereas for all other generated messages (e.g. bounces) it adds
3615
3616 Auto-Submitted: auto-generated
3617
361863. The "personal" condition in filters now includes a test for the
3619 Auto-Submitted: header. If it contains the string "auto-" the message it
3620 not considered personal.
3621
362264. Added rcpt_include_affixes as a generic transport option.
3623
362465. Added queue_only_override (default true).
3625
362666. Added the syslog_duplication option.
3627
362867. If what should have been the first header line of a message consisted of
3629 a space followed by a colon, Exim was mis-interpreting it as a header line.
3630 It isn't of course - it is syntactically invalid and should therefore be
3631 treated as the start of the message body. The misbehaviour could have
3632 caused a number of strange effects, including loss of data in subsequent
3633 header lines, and spool format errors.
3634
363568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3636 client host had authenticated. This control can now be exercised by an ACL
3637 for more flexibility.
3638
363969. By default, callouts do not happen when testing with -bh. There is now a
3640 variant, -bhc, which does actually run the callout code, including
3641 consulting and updating the callout cache.
3642
364370. Added support for saslauthd authentication, courtesy of Alexander
3644 Sabourenkov.
3645
364671. If statvfs() failed on the spool or log directories while checking their
3647 size for availability, Exim confusingly gave the error "space shortage".
3648 Furthermore, in debugging mode it crashed with a floating point exception.
3649 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3650 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3651 serious problem, Exim now writes to the main and panic logs when this
3652 happens, with details of the failure. It then refuses to accept the
3653 incoming message, giving the message "spool directory problem" or "log
3654 directory problem" with a 421 code for SMTP messages.
3655
365672. When Exim is about to re-exec itself, it ensures that the file descriptors
3657 0, 1, and 2 exist, because some OS complain for execs without them (see
3658 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3659 descriptors. However, the code omitted to check that the open succeeded,
3660 causing mysterious errors if for some reason the permissions on /dev/null
3661 got screwed. Now Exim writes a message to the main and panic logs, and
3662 bombs out if it can't open /dev/null.
3663
366473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3665 interact so that it is all more flexible. It is supposed to remain
3666 backwards compatible. Also added extra_local_interfaces.
3667
366874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3669 to bomb out with an assertion failure - to the client this appears as a
3670 connection drop. This problem occurs in the part of the code that was taken
3671 from the Samba project. Fortunately, the assertion is in a very simple
3672 function, so I have fixed this by reproducing the function inline in the
3673 one place where it is called, and arranging for authentication to fail
3674 instead of killing the process with assert().
3675
367675. The SPA client code was not working when the server requested OEM rather
3677 than Unicode encoding.
3678
367976. Added code to make require_files with a specific uid setting more usable in
3680 the case where statting the file as root fails - usually a non-root-mounted
3681 NFS file system. When this happens and the failure is EACCES, Exim now
3682 forks a subprocess and does the per-uid checking as the relevant uid.