exipick version 20060216.1
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
11121d3d 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.307 2006/02/16 17:03:16 jetmore 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
6a3f1455
PH
144PH/26 Added the /no_tell option to "control=freeze".
145
dac79d3e
PH
146PH/27 If a host name lookup failed very early in a connection, for example, if
147 the IP address matched host_lookup and the reverse lookup yielded a name
148 that did not have a forward lookup, an error message of the form "no IP
149 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
150 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 151
5977a0b3
PH
152PH/28 An enabling patch from MH: add new function child_open_exim2() which
153 allows the sender and the authenticated sender to be set when
154 submitting a message from within Exim. Since child_open_exim() is
155 documented for local_scan(), the new function should be too.
156
c91535f3
PH
157PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
158 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
159 results in an empty string is now treated as unset.
160
0d46a8c8
PH
161PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
162
278c6e6c
PH
163PH/31 Added sender_verify_fail logging option.
164
2cbb4081
PH
165PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
166 needed by RFC 822 but not by RFC 2822 was commented out. I have now
167 tidied the source and removed it altogether.
168
3eef829e
PH
169PH/33 When a queue run was abandoned because the load average was too high, a
170 log line was always written; now it is written only if the queue_run log
171 selector is set. In addition, the log line for abandonment now contains
172 information about the queue run such as the pid. This is always present
173 in "start" and "stop" lines but was omitted from the "abandon" line.
174
1ab95fa6
PH
175PH/34 Omit spaces between a header name and the colon in the error message that
176 is given when verify = headers_syntax fails (if there are lots of them,
177 the message gets confusing).
178
230205fc
PH
179PH/35 Change the default for dns_check_names_pattern to allow slashes within
180 names, as there are now some PTR records that contain slashes. This check
181 is only to protect against broken name servers that fall over on strange
182 characters, so the fact that it applies to all lookups doesn't matter.
183
75e0e026
PH
184PH/36 Now that the new test suite is complete, we can remove some of the
185 special code in Exim that was needed for the old test suite. For example,
186 sorting DNS records because real resolvers return them in an arbitrary
187 order. The new test suite's fake resolver always returns records in the
188 same order.
189
190PH/37 When running in the test harness, use -odi for submitted messages (e.g.
191 bounces) except when queue_only is set, to avoid logging races between
192 the different processes.
193
145396a6
PH
194PH/38 Panic-die if .include specifies a non-absolute path.
195
3cd34f13
PH
196PH/39 A tweak to the "H" retry rule from its user.
197
11121d3d
JJ
198JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
199 a label. They prevented compilation on older perls.
200
201JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
202 a warning to be raised on newish perls.
203
204JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
205 on queue. Changes to match documented behaviour of showing count of
206 messages matching specified criteria.
207
214e2000 208
5de37277
PH
209Exim version 4.60
210-----------------
211
cc38ddbf
PH
212PH/01 Two changes to the default runtime configuration:
213
214 (1) Move the checks for relay_from_hosts and authenticated clients from
215 after to before the (commented out) DNS black list checks.
216
217 (2) Add control=submission to the relay_from_hosts and authenticated
218 clients checks, on the grounds that messages accepted by these
219 statements are most likely to be submissions.
5de37277 220
72fdd6ae
PH
221PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
222
223 (1) Generate an error if the third argument for the ${prvs expansion is
224 not a single digit.
225
226 (2) Treat a missing third argument of ${prvscheck as if it were an empty
227 string.
228
229 (3) Reset the variables that are obtained from the first argument of
230 ${prvscheck and used in the second argument before leaving the code,
231 because their memory is reclaimed, so using them afterwards may do
232 silly things.
233
234 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
235 one (it's much easier than Tom thought :-).
236
237 (5) Because of (4), we can now allow for the use of $prvscheck_result
238 inside the third argument.
cb9328de 239
cb741023
PH
240PH/03 For some reason, the default setting of PATH when running a command from
241 a pipe transport was just "/usr/bin". I have changed it to
242 "/bin:/usr/bin".
243
f174f16e
PH
244PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
245 anything to be listed in the output from -bV.
b2f5a032 246
c25242d7
PH
247PH/05 When a filter generated an autoreply, the entire To: header line was
248 quoted in the delivery log line, like this:
249
250 => >A.N.Other <ano@some.domain> <original@ddress> ...
251
252 This has been changed so that it extracts the operative address. There
253 may be more than one such address. If so, they are comma-separated, like
254 this:
255
256 => >ano@some.domain,ona@other.domain <original@ddress> ...
257
82c19f95
PH
258PH/06 When a client host used a correct literal IP address in a HELO or EHLO
259 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
260 not being looked up in the rDNS to get a host name, Exim was showing the
261 IP address twice in Received: lines, even though the IP addresses were
262 identical. For example:
263
264 Received: from [1.2.3.4] (helo=[1.2.3.4])
265
266 However, if the real host name was known, it was omitting the HELO data
267 if it matched the actual IP address. This has been tidied up so that it
268 doesn't show the same IP address twice.
269
d7ffbc12
PH
270PH/07 When both +timestamp and +memory debugging was on, the value given by
271 $tod_xxx expansions could be wrong, because the tod_stamp() function was
272 called by the debug printing, thereby overwriting the timestamp buffer.
273 Debugging no longer uses the tod_stamp() function when +timestamp is set.
274
9f526266
PH
275PH/08 When the original message was included in an autoreply transport, it
276 always said "this is a copy of the message, including all the headers",
277 even if body_only or headers_only was set. It now gives an appropriate
278 message.
279
87fcc8b9
PH
280PH/09 Applied a patch from the Sieve maintainer which:
281
282 o fixes some comments
283 o adds the (disabled) notify extension core
284 o adds some debug output for the result of if/elsif tests
285 o points to the current vacation draft in the documentation
286 and documents the missing references header update
287
288 and most important:
289
290 o fixes a bug in processing the envelope test (when testing
291 multiple envelope elements, the last element determinted the
292 result)
293
456682f5
PH
294PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
295 Electronic Mail") by including:
296
297 Auto-submitted: auto-generated
298
299 in the messages that it generates (bounce messages and others, such as
300 warnings). In the case of bounce messages for non-SMTP mesages, there was
301 also a typo: it was using "Auto_submitted" (underscore instead of
302 hyphen). Since every message generated by Exim is necessarily in response
303 to another message, thes have all been changed to:
304
305 Auto-Submitted: auto-replied
306
307 in accordance with these statements in the RFC:
308
309 The auto-replied keyword:
310
311 - SHOULD be used on messages sent in direct response to another
312 message by an automatic process,
313
314 - MUST NOT be used on manually-generated messages,
315
316 - MAY be used on Delivery Status Notifications (DSNs) and Message
317 Disposition Notifications (MDNs),
318
319 - MUST NOT be used on messages generated by automatic or periodic
320 processes, except for messages which are automatic responses to
321 other messages.
322
3e46c1aa
PH
323PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
324 to the default Received: header definition.
456682f5 325
49826d12
PH
326PH/12 Added log selector acl_warn_skipped (default on).
327
eba0c039
PH
328PH/13 After a successful wildlsearch lookup, discard the values of numeric
329 variables because (a) they are in the wrong storage pool and (b) even if
330 they were copied, it wouldn't work properly because of the caching.
331
a0d6ba8a
PH
332PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
333 checking when decoding. Apparently there are clients that generate
334 overlong encoded strings. Why am I not surprised?
335
f0917727
PH
336PH/15 If the first argument of "${if match_address" was not empty, but did not
337 contain an "@" character, Exim crashed. Now it writes a panic log message
338 and treats the condition as false.
339
096fee00
PH
340PH/16 In autoreply, treat an empty string for "once" the same as unset.
341
024bd3c2
PH
342PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
343 extension "envelope-auth". The code is finished and in agreement with
344 other implementations, but there is no documentation so far and in fact,
345 nobody wrote the draft yet. This extension is currently #undef'ed, thus
346 not changing the active code.
347
348 Print executed "if" and "elsif" statements when debugging is used. This
349 helps a great deal to understand what a filter does.
350
351 Document more things not specified clearly in RFC3028. I had all this
352 sorted out, when out of a sudden new issues came to my mind. Oops."
353
df199fec
PH
354PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
355 (Bugzilla #53).
356
d27f1df3
PH
357PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
358 canonical form (as documented). However, after a host name lookup from
359 the IP address, check_host() was doing a simple string comparison with
360 addresses acquired from the DNS when checking that the found name did
361 have the original IP as one of its addresses. Since any found IPv6
362 addresses are likely to be in abbreviated form, the comparison could
363 fail. Luckily, there already exists a function for doing the comparison
364 by converting both addresses to binary, so now that is used instead of
365 the text comparison.
366
96776534
PH
367PH/20 There was another similar case to PH/19, when a complete host name was
368 given in a host list; looking up its IP address could give an abbreviated
369 form, whereas the current host's name might or might not be abbreviated.
370 The same fix has been applied.
371
5de37277 372
9a799bc0
PH
373Exim version 4.54
374-----------------
375
376PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
377 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
378 It now does.
379
99a4b039
PH
380PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
381 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
382
383PH/03 Typo: missing ".o" in src/pcre/Makefile.
384
4b233853
PH
385PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
386 header line, restrict the check to what is listed in RFCs 2369 and 2929.
387 Also, for "Auto-Submitted", treat anything other than "no" as
388 non-personal, in accordance with RFC 3834. (Previously it treated
389 anything starting "auto-" as non-personal.)
390
8857ccfd
PH
391TF/01 The control=submission/name=... option had a problem with syntax
392 errors if the name included a slash character. The /name= option
393 now slurps the rest of the string, so it can include any characters
394 but it must come last in the list of options (after /sender_retain
395 or /domain=).
396
433a2980
PH
397PH/05 Some modifications to the interface to the fake nameserver for the new
398 testing suite.
399
3e46c1aa 400
9a799bc0 401
e3a311ba
TK
402Exim version 4.53
403-----------------
404
405TK/01 Added the "success_on_redirect" address verification option. See
406 NewStuff for rationale and an example.
407
13b685f9
PH
408PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
409
395ff96d
PH
410PH/02 Patch to exigrep to allow it to work on syslog lines.
411
5b68f6e4
PH
412PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
413 fread() to skip over the body file's header line, because in Cygwin the
414 header line is locked and is inaccessible.
415
1ab52c69
PH
416PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
417 co-exist for some time) to make it clear that it is the Exim ID that is
418 referenced, not the Message-ID: header line.
419
b07e6aa3
PH
420PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
421 string_format() function, because snprintf() does not exist on all
422 operating systems.
423
254e032f
PH
424PH/06 The use of forbid_filter_existstest now also locks out the use of the
425 ${stat: expansion item.
426
3af76a81
PH
427PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
428 protocol synchronization error", to keep the pedants happy.
429
2548ba04
PH
430PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
431 well as for IRIX systems, when gcc is being used. See the host.c source
432 file for comments.
433
b6c6011d
PH
434PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
435
cf39cf57
PH
436PH/10 Named domain lists were not working if used in a queue_smtp_domains
437 setting.
438
f1513293
PH
439PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
440 transport and to the smtp transport in LMTP mode.
441
727549a4
PH
442TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
443
af46795e
PH
444PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
445 run a filter in a subprocess. This could lead to confusion in subsequent
446 lookups in the parent process. There should also be a search_tidyup() at
447 the end of the subprocess.
448
d7b47fd0
PH
449PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
450 only if the host matched helo_try_verify_hosts, which caused the
451 verification to occur when the EHLO/HELO command was issued. The ACL just
452 tested the remembered result. Now, if a previous verification attempt has
453 not happened, "verify = helo" does it there and then.
454
ee744174
JJ
455JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
456
b582ab87
PH
457TK/03 Fix log output including CR from clamd.
458
41a13e0a
PH
459PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
460 exist provoked a memory error which could cause a segfault.
461
f625cc5a
PH
462PH/15 Installed PCRE 6.2
463
464PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
465
21f7af35
PH
466PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
467 of the problem. Specifically, suggested +O2 rather than +O1 for the
468 HP-UX compiler.
469
31480e42
PH
470PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
471
2d280592
PH
472PH/20 If a delivery was routed to a non-standard port by means of an SRV
473 record, the port was not correctly logged when the outgoing_port log
474 selector was set (it logged the transort's default port).
475
7cd1141b
PH
476PH/21 Added support for host-specific ports to manualroute, queryprogram,
477 fallback_hosts, and "hosts" in the smtp transport.
478
479PH/22 If the log selector "outgoing_port" is set, the port is now also given on
480 host errors such as "Connection refused".
481
750af86e
PH
482PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
483 authentication with radiusclient 0.4.9:
484
485 - Error returned from rc_read_config was caught wrongly
486 - Username/password not passed on to radius server due to wrong length.
487
488 The presumption is that some radiusclient API changes for 4.51/PH/17
489 were not taken care of correctly. The code is still untested by me (my
490 Linux distribution still has 0.3.2 of radiusclient), but it was
491 contributed by a Radius user.
492
493PH/24 When doing a callout, the value of $domain wasn't set correctly when
494 expanding the "port" option of the smtp transport.
495
4304270b
TK
496TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
497 while reading a MIME header. Thanks to Tom Hughes for a patch.
498
750af86e
PH
499PH/24 Include config.h inside local_scan.h so that configuration settings are
500 available.
501
64ffc24f
PH
502PH/25 Make $smtp_command_argument available after all SMTP commands. This means
503 that in an ACL for RCPT (for example), you can examine exactly what was
504 received.
505
5dd9625b
PH
506PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
507 commands, but it was not correctly comparing the address with the actual
508 client host address. Thus, it would show the EHLO address in Received:
509 header lines when this was not necessary.
510
5591031b
PH
511PH/27 Added the % operator to ${eval:}.
512
ba18e66a
PH
513PH/28 Exim tries to create and chdir to its spool directory when it starts;
514 it should be ignoring failures (because with -C, for example, it has lost
515 privilege). It wasn't ignoring creation failures other than "already
516 exists".
517
9cec981f
PH
518PH/29 Added "crypteq" to the list of supported features that Exim outputs when
519 -bV or -d is used.
520
aa2b5c79
PH
521PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
522 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
523 too many continuations, the temporary file was not being removed, and the
524 return code was incorrect.
aa2b5c79 525
48a53b7f
PH
526PH/31 Missing "BOOL" in function definition in filtertest.c.
527
1c59d63b
PH
528PH/32 Applied Sieve patches from the maintainer.
529
671012da
TK
530TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
531
1509d3a8
PH
532PH/33 Added "verify = not_blind".
533
534PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
535 Local/Makefile (with some defaults set). These are used in built scripts
536 such as exicyclog, but they have never been used in the exim_install
537 script (though there are many overriding facilities there). I have
538 arranged that the exim_install script now takes note of these two
539 settings.
540
541PH/35 Installed configuration files for Dragonfly.
542
2fe1a124
PH
543PH/36 When a locally submitted message by a trusted user did not contain a
544 From: header, and the sender address was obtained from -f or from an SMTP
545 MAIL command, and the trusted user did not use -F to supply a sender
546 name, $originator_name was incorrectly used when constructing a From:
547 header. Furthermore, $originator_name was used for submission mode
548 messages from external hosts without From: headers in a similar way,
549 which is clearly wrong.
550
8800895a
PH
551PH/37 Added control=suppress_local_fixups.
552
ccfdb010
PH
553PH/38 When log_selector = +received_sender was set, and the addition of the
554 sender made the log line's construction buffer exactly full, or one byte
555 less than full, an overflow happened when the terminating "\n" was
556 subsequently added.
557
1130bfb0
PH
558PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
559 when the result of a list match is failure because a DNS lookup failed.
560
ebcb507f
PH
561PH/40 RM_COMMAND is now used in the building process.
562
c35e155c
PH
563PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
564 the "build-* directories that it finds.
565
95d1f782
PH
566PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
567 address in a domain literal was a prefix of an interface address.
568
fd6de02e
PH
569PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
570 when verifying a sender address, unless rewrite_headers is false.
571
58de37c5
PH
572PH/44 Wrote a long comment about why errors_to addresses are verified as
573 recipients, not senders.
574
261cf466
TF
575TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
576 the ratelimit ACL was added.
577
3ee512ff
PH
578PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
579
e08c430f
PH
580PH/46 Added extra information about PostgreSQL errors to the error string.
581
bef5a11f
PH
582PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
583 avoiding the need to install special zones in a real server. This is
584 backwards compatible; if it can't find the fake resolver, it drops back.
585 Thus, both old and new test suites can be run.
586
7546de58
TF
587TF/02 Added util/ratelimit.pl
588
e5d5a95f
TF
589TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
590 clock is set back in time.
591
2e88a017
TF
592TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
593 Candler <B.Candler@pobox.com>.
594
a5f65aa4
TF
595TF/05 The fix for PH/43 was not completely correct; widen_domains is always
596 OK for addresses that are the result of redirections.
597
e7726cbf
PH
598PH/48 A number of further additions for the benefit of the new test suite,
599 including a fake gethostbyname() that interfaces to the fake DNS resolver
600 (see PH/47 above).
601
a7fdad5b
TF
602TF/06 The fix for widen_domains has also been applied to qualify_single and
603 search_parents which are the other dnslookup options that can cause
604 header rewrites.
605
6af56900
PH
606PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
607 type ("H").
608
0925ede6
PH
609PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
610
66afa403
TF
611TF/07 Exim produced the error message "an SRV record indicated no SMTP
612 service" if it encountered an MX record with an empty target hostname.
613 The message is now "an MX or SRV record indicated no SMTP service".
614
0154e85a
TF
615TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
616 if the DNS of the sending site is misconfigured. This is quite a
617 common situation. This change restores the behaviour of treating a
618 helo verification defer as a failure.
619
16f12c76
PH
620PH/51 If self=fail was set on a router, the bounce message did not include the
621 actual error message.
622
bbe902f0 623
e5a9dba6
PH
624Exim version 4.52
625-----------------
626
627TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
628
22c3b60b
PH
629PH/01 When a transport filter timed out in a pipe delivery, and the pipe
630 command itself ended in error, the underlying message about the transport
631 filter timeout was being overwritten with the pipe command error. Now the
632 underlying error message should be appended to the second error message.
633
06a9b4b5
PH
634TK/01 Fix poll() being unavailable on Mac OSX 10.2.
635
c1ac6996
PH
636PH/02 Reduce the amount of output that "make" produces by default. Full output
637 can still be requested.
638
9c7a242c
PH
639PH/03 The warning log line about a condition test deferring for a "warn" verb
640 was being output only once per connection, rather than after each
641 occurrence (because it was using the same function as for successful
642 "warn" verbs). This seems wrong, so I have changed it.
643
87ba3f5f
PH
644TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
645 it should not have, which might have caused a crash in the right
646 circumstances, but probably never did.
647
648PH/04 Installed a modified version of Tony Finch's patch to make submission
649 mode fix the return path as well as the Sender: header line, and to
650 add a /name= option so that you can make the user's friendly name appear
651 in the header line.
652
29aba418
TF
653TF/03 Added the control = fakedefer ACL modifier.
654
fe0dab11
TF
655TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
656 Mark Lowes for thorough testing.
870f6ba8 657
11d337a4
TK
658TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
659
660TK/03 Merged latest SRS patch from Miles Wilton.
661
415c8f3b
PH
662PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
663 with the definition in sysexits.h (which is #included earlier).
664 Fortunately, Exim does not actually use EX_OK. The code used to try to
665 preserve the sysexits.h value, by assumimg that macro definitions were
666 scanned for macro replacements. I have been disabused of this notion,
667 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 668
958541e9
PH
669PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
670 in the smtp transport. When a block could not be written in a single
671 write() function, the timeout was being re-applied to each part-write.
672 This seems wrong - if the receiver was accepting one byte at a time it
673 would take for ever. The timeout is now adjusted when this happens. It
674 doesn't have to be particularly precise.
675
c206415f
TK
676TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
677 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
678
2a4be8f9
PH
679PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
680 without a domain if the check to <postmaster@domain> fails.
681
1cba11c5
SC
682SC/01 Eximstats: added -xls and the ability to specify output files
683 (patch written by Frank Heydlauf).
684
685SC/02 Eximstats: use FileHandles for outputing results.
686
687SC/03 Eximstats: allow any combination of xls, txt, and html output.
688
689SC/04 Eximstats: fixed display of large numbers with -nvr option
690
691SC/05 Eximstats: fixed merging of reports with empty tables.
692
693SC/06 Eximstats: added the -include_original_destination flag
694
695SC/07 Eximstats: removed tabs and trailing whitespace.
696
1005d00e
TK
697TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
698
699TK/06 MBOX spool code: Add real "From " MBOX separator line
700 so the .eml file is really in mbox format (even though
701 most programs do not really care). Patch from Alex Miller.
702
703TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
704 The latter is generated from $received_to and is only set if the
705 message has one envelope recipient. SA can use these headers,
706 obviously out-of-the-box. Patch from Alex Miller.
707
9b4768fa
PH
708PH/08 The ${def test on a variable was returning false if the variable's
709 value was "0", contrary to what the specification has always said!
710 The result should be true unless the variable is empty.
711
712PH/09 The syntax error of a character other than { following "${if
713 def:variable_name" (after optional whitespace) was not being diagnosed.
714 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
715 accidental colon was present, for example, could give incorrect results.
716
0d7eb84a
PH
717PH/10 Tidied the code in a number of places where the st_size field of a stat()
718 result is used (not including appendfile, where other changes are about
719 to be made).
720
721PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
722 This involved changing a lot of size variables from int to off_t. It
723 should work with maildirs and everything.
724
40727bee
TK
725TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
726 spamd dying while we are connected to it.
727
554d2369
TF
728TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
729 <jgh@wizmail.org>
730
1f922db1
PH
731PH/12 Applied Alex Kiernan's patch for the API change for the error callback
732 function for BDB 4.3.
733
ef213c3b
PH
734PH/13 Changed auto_thaw such that it does not apply to bounce messages.
735
8ac170f3
PH
736PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
737 the sources for PCRE have been re-arranged and more files are now
738 involved.
739
b1c749bb
PH
740PH/15 The code I had for printing potentially long long variables in PH/11
741 above was not the best (it lost precision). The length of off_t variables
742 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
743 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
744 to be "long long int" or "long int". This is needed for the internal
745 formatting function string_vformat().
b1c749bb 746
4aac9b49
PH
747PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
748 the configuration file to be ":syslog", then the script "guesses" where
749 the logs files are, rather than using the compiled in default. In our
750 case the guess is not the same as the compiled default, so the script
751 suddenly stopped working when I started to use syslog. The patch checks
752 to see if log_file_path is "". If so, it attempts to read it from exim
753 with no configuration file to get the compiled in version, before it
754 falls back to the previous guessing code."
755
294520c8
TK
756TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
757 implementing BATV in an Exim configuration. See NewStuff for the gory
758 details.
759
5bd022fe
PH
760PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
761 Makefile that are specific to HP-UX.
762
90e9ce59
PH
763PH/18 If the "use_postmaster" option was set for a recipient callout together
764 with the "random" option, the postmaster address was used as the MAIL
765 FROM address for the random test, but not for the subsequent recipient
766 test. It is now used for both.
767
5ea81592
PH
768PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
769 patch removes a few documentation additions to RFC 3028, because the
770 latest draft now contains them. It adds the new en;ascii-case comparator
771 and a new error check for 8bit text in MIME parts. Comparator and
772 require names are now matched exactly. I enabled the subaddress
773 extension, but it is not well tested yet (read: it works for me)."
774
c6c2dc1d
PH
775PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
776 rework some of the code of TK/09 above to avoid the hardwired use of
777 "%lld" and "long long". Replaced the call to snprintf() with a call to
778 string_vformat().
779
fffffe4c
PH
780PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
781 records point to non-existent hosts", "retry timeout exceeded", and
782 "retry time not reached for any host after a long failure period".
ca02eafb 783
9a26b6b2
PH
784PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
785 experimental DomainKeys support:
786
787 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
788 (2) On an error such as an illegally used "control", the wrong name for
789 the control was given.
790
791 These problems did NOT occur unless DomainKeys support was compiled.
792
4aee0225
PH
793PH/23 Added daemon_startup_retries and daemon_startup_sleep.
794
32d668a5
PH
795PH/24 Added ${if match_ip condition.
796
8187c3f3
PH
797PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
798 databases so that it will be absolutely obvious if a crash occurs in the
799 DB library. This is a regular occurrence (often caused by mis-matched
800 db.h files).
801
ff790e47 802PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
803 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
804 picked up on a user's system that detects such things. There doesn't seem
805 to be a gcc warning option for this - only an attribute that has to be
806 put on the function's prototype. It seems that in Fedora Core 4 they have
807 set this on a number of new functions. No doubt there will be more in due
808 course.
ff790e47 809
5417f6d1
PH
810PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
811 specify a transport. However, if an address that was verified by such a
812 router was the subject of a callout, Exim crashed because it tried to
813 read the rcpt_include_affixes from the non-existent transport. Now it
814 just assumes that the setting of that option is false. This bug was
815 introduced by 4.51/PH/31.
816
59cf8544
PH
817PH/28 Changed -d+all to exclude +memory, because that information is very
818 rarely of interest, but it makes the output a lot bigger. People tend to
819 do -d+all out of habit.
820
e7ad8a65
PH
821PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
822 code in os-type was giving problems when libc.so lives in lib64, like on
823 x86_64 Fedora Core.
824
ade42478
PH
825PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
826 aren't the modern standard, and it seems that some systems' include files
827 don't always have them. Exim was already checking for some of the newer
828 ones like T_AAAA, and defining it itself. I've added checks for all the
829 record types that Exim uses.
830
182ad5cf
PH
831PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
832 not automatically generating a new one, as it is supposed to. This
833 prevented TLS from working. If the file did exist, but contained invalid
834 data, a new version was generated, as expected. It was only the case of a
835 non-existent file that was broken.
836
b0d9fc80
TK
837TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
838 with a change in libdomainkeys > 0.64.
839
840TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
841 from DNS. If the selector record carries the flag, it now has
842 precedence over the domain-wide flag.
843
844TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
845
47c7a64a
PH
846PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
847 the use of a port name that isn't defined in /etc/services) occurred, the
848 message was deferred as in a normal delivery, and thus remained on the
849 spool, instead of being failed because of the mua_wrapper setting. This
850 is now fixed, and I tidied up some of the mua_wrapper messages at the
851 same time.
852
a388bce4
SC
853SC/08 Eximstats: whilst parsing the mainlog(s), store information about
854 the messages in a hash of arrays rather than using individual hashes.
855 This is a bit cleaner and results in dramatic memory savings, albeit
856 at a slight CPU cost.
857
858SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
859 as requested by Marc Sherman.
860
861SC/10 Eximstats: added histograms for user specified patterns as requested
862 by Marc Sherman.
863
0793e4ed
SC
864SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
865
c58b88df
PH
866PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
867 fopen() in the content-scanning modules that did not already have it.
868
e7ad8a65 869
7982096b
PH
870Exim version 4.51
871-----------------
872
1a46a8c5
PH
873TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
874 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
875
2f079f46 876TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
877
878TK/03 Fix ACL "regex" condition not being available in MIME ACL.
879
880PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
881 to test Sieve filters that use "vacation".
882
883PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
884 that changes the way the GnuTLS parameters are stored in the cache file.
885 The new format can be generated externally. For backward compatibility,
886 if the data in the cache doesn't make sense, Exim assumes it has read an
887 old-format file, and it generates new data and writes a new file. This
888 means that you can't go back to an older release without removing the
889 file.
890
891PH/03 A redirect router that has both "unseen" and "one_time" set does not
892 work if there are any delivery delays because "one_time" forces the
893 parent to be marked "delivered", so its unseen clone is never tried
894 again. For this reason, Exim now forbids the simultaneous setting of
895 these two options.
896
897PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
898 redirected to themselves ("homonym" addresses). Read the long ChangeLog
899 entry if you want to know the details. The fix, however, neglected to
900 consider the case when local delivery batching is involved. The test for
901 "previously delivered" was not happening when checking to see if an
902 address could be batched with a previous (undelivered) one; under
903 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 904 address.
1a46a8c5
PH
905
906PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
907 in its include files, and this causes problems building Exim.
908
909PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
910 header_syntax) but Exim was just ignoring anything given after a slash.
911 In particular, this caused confusion with an attempt to use "verify =
912 reverse_host_lookup/defer_ok". An error is now given when options are
913 supplied for verify items that do not have them. (Maybe reverse_host_
914 lookup should have a defer_ok option, but that's a different point.)
915
916PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
917 defined by RFC 821) to 2048, because there were problems with some AUTH
918 commands, and RFC 1869 says the size should be increased for extended
919 SMTP commands that take arguments.
920
921PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
922 Finch).
923
924PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
925 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 926
49c2d5ea
PH
927PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
928 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
929 whatever). Otherwise the password may appear in the log. Following change
930 PH/42 below, there is no longer a chance of it appearing in a bounce
931 message.
49c2d5ea 932
bf759a8b
PH
933PH/11 Installed exipick version 20050225.0 from John Jetmore.
934
83364d30
PH
935PH/12 If the last host in a fallback_hosts list was multihomed, only the first
936 of its addresses was ever tried. (Bugzilla bug #2.)
937
7999bbd7
PH
938PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
939 the result incorrectly in the debug output. (It correctly added a newline
940 to what was transported.)
941
7dbf77c9
PH
942TF/01 Added $received_time.
943
74e0617f
PH
944PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
945 commented out examples of how to interface to a virus scanner and to
946 SpamAssassin. Also added commented examples of av_scanner and
947 spamd_address settings.
948
2f079f46
PH
949PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
950 and controls are allowed in which ACLs. There were a couple of minor
951 errors. Some of the entries in the conditions table (which is a table of
952 where they are NOT allowed) were getting very unwieldy; rewrote them as a
953 negation of where the condition IS allowed.
954
8c841523
PH
955PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
956
7766a4f0
PH
957PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
958 header file does not have a version number, so I've had to invent a new
959 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
960 API. The code is untested by me (my Linux distribution still has 0.3.2 of
961 radiusclient), but it was contributed by a Radius user.
962
8b417f2c
PH
963PH/18 Installed Lars Mainka's patch for the support of CRL collections in
964 files or directories, for OpenSSL.
965
901f42cb
PH
966PH/19 When an Exim process that is running as root has to create an Exim log
967 file, it does so in a subprocess that runs as exim:exim so as to get the
968 ownership right at creation (otherwise, other Exim processes might see
969 the file with the wrong ownership). There was no test for failure of this
970 fork() call, which would lead to the process getting stuck as it waited
971 for a non-existent subprocess. Forks do occasionally fail when resources
972 run out. I reviewed all the other calls to fork(); they all seem to check
973 for failure.
974
f9b9210e
PH
975PH/20 When checking for unexpected SMTP input at connect time (before writing
976 the banner), Exim was not dealing correctly with a non-positive return
977 from the read() function. If the client had disconnected by this time,
978 the result was a log entry for a synchronization error with an empty
979 string after "input=" when read() returned zero. If read() returned -1
980 (an event I could not check), uninitialized data bytes were printed.
981 There were reports of junk text (parts of files, etc) appearing after
982 "input=".
983
54cdb463
PH
984PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
985
cf00dad6
PH
986PH/22 Added support for macro redefinition, and (re)definition in between
987 driver and ACL definitions.
988
acb1b346
PH
989PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
990 forgetting to use the resulting value; it was using the unexpanded value.
991
c5ddb310
PH
992PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
993 hadn't been configured. The fix is from Juergen Kreileder, who
994 understands it better than I do:
995
996 "Here's what I see happening with three configured cyrus_sasl
997 authenticators configured (plain, login, cram-md5):
998
999 On startup auth_cyrus_sasl_init() gets called for each of these.
1000 This means three calls to sasl_listmech() without a specified mech_list.
1001 => SASL tests which mechs of all available mechs actually work
1002 => three warnings about OTP not working
1003 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1004
1005 With the patch, sasl_listmech() also gets called three times. But now
1006 SASL's mech_list option is set to the server_mech specified in the the
1007 authenticator. Or in other words, the answer from sasl_listmech()
1008 gets limited to just the mech you're testing for (which is different
1009 for each call.)
1010 => the return list contains just 'plain' or 'login', 'cram-md5' or
1011 nothing depending on the value of ob->server_mech.
1012
1013 I've just tested the patch: Authentication still works fine,
1014 unavailable mechs specified in the exim configuration are still
1015 caught, and the auth.log warnings about OTP are gone."
1016
31619da6
PH
1017PH/25 When debugging is enabled, the contents of the command line are added
1018 to the debugging output, even when log_selector=+arguments is not
1019 specified.
1020
bebaf0fc
PH
1021PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1022 answer is "GNU", and only if the return is "GNU/something" is the answer
1023 "Linux".
1024
475fe28a
PH
1025PH/27 $acl_verify_message is now set immediately after the failure of a
1026 verification in an ACL, and so is available in subsequent modifiers. In
1027 particular, the message can be preserved by coding like this:
1028
1029 warn !verify = sender
1030 set acl_m0 = $acl_verify_message
1031
1032 Previously, $acl_verify_message was set only while expanding "message"
1033 and "log_message" when a very denied access.
1034
7e8bec7a
PH
1035PH/28 Modified OS/os.c-Linux with
1036
1037 -#ifndef OS_LOAD_AVERAGE
1038 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1039
1040 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1041 nomenclature these days.)
1042
e4a89c47
PH
1043PH/29 Installed patch from the Sieve maintainer that adds the options
1044 sieve_useraddress and sieve_subaddress to the redirect router.
1045
5ca2a9a1
PH
1046PH/30 In these circumstances:
1047 . Two addresses routed to the same list of hosts;
1048 . First host does not offer TLS;
1049 . First host accepts first address;
1050 . First host gives temporary error to second address;
1051 . Second host offers TLS and a TLS session is established;
1052 . Second host accepts second address.
1053 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1054 and peerdn, if requested) that were in fact used only for the second
1055 address.
7e8bec7a 1056
c688b954
PH
1057PH/31 When doing a callout as part of verifying an address, Exim was not paying
1058 attention to any local part prefix or suffix that was matched by the
1059 router that accepted the address. It now behaves in the same way as it
1060 does for delivery: the affixes are removed from the local part unless
1061 rcpt_include_affixes is set on the transport.
1062
fed77020
PH
1063PH/32 Add the sender address, as F=<...>, to the log line when logging a
1064 timeout during the DATA phase of an incoming message.
1065
7fe1560f
PH
1066PH/33 Sieve envelope tests were broken for match types other than :is. I have
1067 applied a patch sanctioned by the Sieve maintainer.
c688b954 1068
ebb6e6d5
PH
1069PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1070 the uid or gid is negative. A case of a negative gid caused this to be
1071 noticed. The fix allows for either to be negative.
1072
9c4e8f60
PH
1073PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1074 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1075 overlooked.
1076
1077PH/36 The change PH/12 above was broken. Fixed it.
1078
d7174846
PH
1079PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1080 the grounds that routing the same address twice would always produce the
1081 same answer. This might have been true once, but it is certainly no
1082 longer true now. Routing a child address may depend on the previous
1083 routing that produced that child. Some complicated redirection strategies
1084 went wrong when messages had multiple recipients, and made Exim's
1085 behaviour dependent on the order in which the addresses were given.
1086
1087 I have moved the duplicate checking until after the routing is complete.
1088 Exim scans the addresses that are assigned to local and remote
1089 transports, and removes any duplicates. This means that more work will be
1090 done, as duplicates will always all be routed, but duplicates are
1091 presumably rare, so I don't expect this is of any significance.
1092
1093 For deliveries to pipes, files, and autoreplies, the duplicate checking
1094 still happens during the routing process, since they are not going to be
1095 routed further.
1096
cfe75fc3
PH
1097PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1098 It corrects a timeout issue with spamd. This is Ian's comment: "The
1099 background is that sometimes spamd either never reads data from a
1100 connection it has accepted, or it never writes response data. The exiscan
1101 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1102 blindly assumes that writes won't block so it may never time out."
1103
be22d70e
PH
1104PH/39 Allow G after quota size as well as K and M.
1105
0612b098
PH
1106PH/40 The value set for $authenticated_id in an authenticator may not contain
1107 binary zeroes or newlines because the value is written to log lines and
1108 to spool files. There was no check on this. Now the value is run through
1109 the string_printing() function so that such characters are converted to
1110 printable escape sequences.
1111
2e0c1448
PH
1112PH/41 $message_linecount is a new variable that contains the total number of
1113 lines in the message. Compare $body_linecount, which is the count for the
1114 body only.
1115
447d236c
PH
1116PH/42 Exim no longer gives details of delivery errors for specific addresses in
1117 bounce and delay warning messages, except in certain special cases, which
1118 are as follows:
1119
1120 (a) An SMTP error message from a remote host;
1121 (b) A message specified in a :fail: redirection;
1122 (c) A message specified in a "fail" command in a system filter;
1123 (d) A message specified in a FAIL return from the queryprogram router;
1124 (e) A message specified by the cannot_route_message router option.
1125
1126 In these cases only, Exim does include the error details in bounce and
1127 warning messages. There are also a few cases where bland messages such
1128 as "unrouteable address" or "local delivery error" are given.
1129
d20976dc
PH
1130PH/43 $value is now also set for the "else" part of a ${run expansion.
1131
f656d135
PH
1132PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1133 being worked on, but at least Exim now implements the latest version to
1134 play with."
1135
2e2a30b4
PH
1136PH/45 In a pipe transport, although a timeout while waiting for the pipe
1137 process to complete was treated as a delivery failure, a timeout while
1138 writing the message to the pipe was logged, but erroneously treated as a
1139 successful delivery. Such timeouts include transport filter timeouts. For
1140 consistency with the overall process timeout, these timeouts are now
1141 treated as errors, giving rise to delivery failures by default. However,
1142 there is now a new Boolean option for the pipe transport called
1143 timeout_defer, which, if set TRUE, converts the failures into defers for
1144 both kinds of timeout. A transport filter timeout is now identified in
1145 the log output.
1146
9176e9f0
PH
1147PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1148 systems where "make" and "gmake" are different, calling "gmake" at top
1149 level broke things. I've arranged for the value of $(MAKE) to be passed
1150 from the Makefile to this script so that it can call the same version of
1151 "make".
1152
7982096b 1153
bbe902f0
PH
1154A note about Exim versions 4.44 and 4.50
1155----------------------------------------
1156
1157Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1158changes of various kinds. As a consequence, a big documentation update was
1159needed. This delayed the release for rather longer than seemed good, especially
1160in the light of a couple of (minor) security issues. Therefore, the changes
1161that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1162release. So 4.44 and 4.50 are in effect two different branches that both start
1163from 4.43.
1164
1165I have left the 4.50 change log unchanged; it contains all the changes since
11664.43. The change log for 4.44 is below; many of its items are identical to
1167those for 4.50. This seems to be the most sensible way to preserve the
1168historical information.
1169
1170
f7b63901 1171Exim version 4.50
495ae4b0
PH
1172-----------------
1173
5fe762f6
PH
1174 1. Minor wording change to the doc/README.SIEVE file.
1175
139059f6 1176 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1177 computation of the current number of files was incorrect.
495ae4b0 1178
7086e875
PH
1179 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1180 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1181 place.
1182
35af9f61
PH
1183 4. Give more explanation in the error message when the command for a transport
1184 filter fails to execute.
1185
b668c215
PH
1186 5. There are several places where Exim runs a non-Exim command in a
1187 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1188 was being done only for the command run by the queryprogram router. It is
1189 now done for all such subprocesses. The other cases are: ${run, transport
1190 filters, and the commands run by the lmtp and pipe transports.
1191
a494b1e1
PH
1192 6. Added CONFIGURE_GROUP build-time option.
1193
1194 7. Some older OS have a limit of 256 on the maximum number of file
1195 descriptors. Exim was using setrlimit() to set 1000 as a large value
1196 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1197 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1198
c5fcb476
PH
1199 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1200 was an oversight, and furthermore, ever since the addition of extra
1201 controls (e.g. 4.43/32), the checks on when to allow different forms of
1202 "control" were broken. There should now be diagnostics for all cases when a
1203 control that does not make sense is encountered.
1204
69358f02
PH
1205 9. Added the /retain_sender option to "control=submission".
1206
5be20824
PH
120710. $recipients is now available in the predata ACL (oversight).
1208
eb2c0248
PH
120911. Tidy the search cache before the fork to do a delivery from a message
1210 received from the command line. Otherwise the child will trigger a lookup
1211 failure and thereby defer the delivery if it tries to use (for example) a
1212 cached ldap connection that the parent has called unbind on.
1213
2a3eea10
PH
121412. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1215 of $address_data from the recipient verification was clobbered by the
1216 sender verification.
1217
121813. The value of address_data from a sender verification is now available in
1219 $sender_address_data in subsequent conditions in the ACL statement.
1220
23c7ff99
PH
122114. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1222
4deaf07d
PH
122315. Added a new option "connect=<time>" to callout options, to set a different
1224 connection timeout.
1225
926e1192
PH
122616. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1227 was its contents. (It was OK if the option was not defined at all.)
1228
650edc6f
PH
122917. A "Completed" log line is now written for messages that are removed from
1230 the spool by the -Mrm option.
1231
2c7db3f5
PH
123218. New variables $sender_verify_failure and $recipient_verify_failure contain
1233 information about exactly what failed.
1234
3d235903
PH
123519. Added -dd to debug only the daemon process.
1236
7c7ad977
PH
123720. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1238 handles timeouts, both on the server side and network timeouts. Renamed the
1239 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1240
981756db
PH
124121. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1242 It is now set to "smtps".
1243
d4eb88df
PH
124422. $host_address is now set to the target address during the checking of
1245 ignore_target_hosts.
1246
124723. When checking ignore_target_hosts for an ipliteral router, no host name was
1248 being passed; this would have caused $sender_host_name to have been used if
1249 matching the list had actually called for a host name (not very likely,
1250 since this list is usually IP addresses). A host name is now passed as
1251 "[x.x.x.x]".
1252
7d468ab8
PH
125324. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1254 code that specifies a non-restarting handler (typically sigaction() in
1255 modern systems) in an attempt to fix a rare and obscure crash bug.
1256
125725. Narrowed the window for a race in the daemon that could cause it to ignore
1258 SIGCHLD signals. This is not a major problem, because they are used only to
1259 wake it up if nothing else does.
1260
62c0818f
PH
126126. A malformed maildirsize file could cause Exim to calculate negative values
1262 for the mailbox size or file count. Odd effects could occur as a result.
1263 The maildirsize information is now recalculated if the size or filecount
1264 end up negative.
1265
26034054
PH
126627. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1267 support for a long time. Removed HAVE_SYS_VFS_H.
1268
af66f652
PH
126928. Installed the latest version of exipick from John Jetmore.
1270
90af77f4
PH
127129. In an address list, if the pattern was not a regular expression, an empty
1272 subject address (from a bounce message) matched only if the pattern was an
1273 empty string. Non-empty patterns were not even tested. This was the wrong
1274 because it is perfectly reasonable to use an empty address as part of a
1275 database query. An empty address is now tested by patterns that are
1276 lookups. However, all the other forms of pattern expect the subject to
1277 contain a local part and a domain, and therefore, for them, an empty
1278 address still always fails if the pattern is not itself empty.
1279
d8ef3577
PH
128030. Exim went into a mad DNS loop when attempting to do a callout where the
1281 host was specified on an smtp transport, and looking it up yielded more
1282 than one IP address.
1283
5cb8cbc6
PH
128431. Re-factored the code for checking spool and log partition space into a
1285 function that finds that data and another that does the check. The former
1286 is then used to implement four new variables: $spool_space, $log_space,
1287 $spool_inodes, and $log_inodes.
1288
14702f5b
PH
128932. The RFC2047 encoding function was originally intended for short strings
1290 such as real names; it was not keeping to the 75-character limit for
1291 encoded words that the RFC imposes. It now respects the limit, and
1292 generates multiple encoded words if necessary. To be on the safe side, I
1293 have increased the buffer size for the ${rfc2047: expansion operator from
1294 1024 to 2048 bytes.
1295
063b1e99
PH
129633. It is now permitted to omit both strings after an "if" condition; if the
1297 condition is true, the result is "true". As before, when the second string
1298 is omitted, a false condition yields an empty string. This makes it less
1299 cumbersome to write custom ACL and router conditions.
1300
652e1b65
PH
130134. Failure to deliver a bounce message always caused it to be frozen, even if
1302 there was an errors_to setting on the router. The errors_to setting is now
1303 respected.
1304
6f0c9a4f
PH
130535. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1306 canonical form (fully expanded) before being placed in
1307 $sender_host_address.
1308
33397d19
PH
130936. The table in the code that translates DNS record types into text (T_A to
1310 "A" for instance) was missing entries for NS and CNAME. It is just possible
1311 that this could have caused confusion if both these types were looked up
1312 for the same domain, because the text type is used as part of Exim's
1313 per-process caching. But the chance of anyone hitting this buglet seems
1314 very small.
1315
7bb56e1f
PH
131637. The dnsdb lookup has been extended in a number of ways.
1317
1318 (1) There is a new type, "zns", which walks up the domain tree until it
1319 finds some nameserver records. It should be used with care.
1320
ea3bc19b
PH
1321 (2) There is a new type, "mxh", which is like "mx" except that it returns
1322 just the host names, not the priorities.
1323
1324 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1325 looked up. The behaviour when one of the lookups defers can be
1326 controlled by a keyword.
7bb56e1f 1327
ea3bc19b 1328 (4) It is now possible to specify the separator character for use when
7bb56e1f 1329 multiple records are returned.
33397d19 1330
0bcb2a0e
PH
133138. The dnslists ACL condition has been extended: it is now possible to supply
1332 a list of IP addresses and/or domains to be looked up in a particular DNS
1333 domain.
1334
2ac0e484
PH
133539. Added log_selector=+queue_time_overall.
1336
4e1fde53
PH
133740. When running the queue in the test harness, wait just a tad after forking a
1338 delivery process, to get repeatability of debugging output.
1339
de365ded
PH
134041. Include certificate and key file names in error message when GnuTLS fails
1341 to set them up, because the GnuTLS error message doesn't include the name
1342 of the failing file when there is a problem reading it.
1343
f05da2e8
PH
134442. Allow both -bf and -bF in the same test run.
1345
d6453af2
PH
134643. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1347
f7b63901
PH
134844. The "Exiscan patch" is now merged into the mainline Exim source.
1349
135045. Sometimes the final signoff response after QUIT could fail to get
1351 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1352 < 0 before doing a fflush(). This bug looks as though it goes back to the
1353 introduction of TLS in release 3.20, but "sometimes" must have been rare
1354 because the tests only now provoked it.
1355
a444213a
PH
135646. Reset the locale to "C" after calling embedded Perl, in case it was changed
1357 (this can affect the format of dates).
1358
0ec020ea
PH
135947. exim_tidydb, when checking for the continued existence of a message for
1360 which it has found a message-specific retry record, was not finding
1361 messages that were in split spool directories. Consequently, it was
1362 deleting retry records that should have stayed in existence.
1363
b1206957
PH
136448. Steve fixed some bugs in eximstats.
1365
136649. The SPA authentication driver was not abandoning authentication and moving
1367 on to the next authenticator when an expansion was forced to fail,
1368 contradicting the general specification for all authenticators. Instead it
1369 was generating a temporary error. It now behaves as specified.
1370
26dd5a95
PH
137150. The default ordering of permitted cipher suites for GnuTLS was pessimal
1372 (the order specifies the preference for clients). The order is now AES256,
1373 AES128, 3DES, ARCFOUR128.
1374
343b2385
PH
137551. Small patch to Sieve code - explicitly set From: when generating an
1376 autoreply.
1377
1c5466b9
PH
137852. Exim crashed if a remote delivery caused a very long error message to be
1379 recorded - for instance if somebody sent an entire SpamAssassin report back
1380 as a large number of 550 error lines. This bug was coincidentally fixed by
1381 increasing the size of one of Exim's internal buffers (big_buffer) that
1382 happened as part of the Exiscan merge. However, to be on the safe side, I
1383 have made the code more robust (and fixed the comments that describe what
1384 is going on).
1385
55ee9ee3
PH
138653. Now that there can be additional text after "Completed" in log lines (if
1387 the queue_time_overall log selector is set), a one-byte patch to exigrep
1388 was needed to allow it to recognize "Completed" as not the last thing in
1389 the line.
1390
d38f8232
PH
139154. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1392 patch that reportedly fixes this has been added. I am not expert enough to
1393 create a test for it. This is what the patch creator wrote:
1394
1395 "I found a little strange behaviour of ldap code when working with
1396 Windows 2003 AD Domain, where users was placed in more than one
1397 Organization Units. When I tried to give exim partial DN, the exit code
1398 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1399 But simultaneously result of request was absolutely normal ldap result,
1400 so I produce this patch..."
1401
3295e65b
PH
1402 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1403 REFERENCE, so I have modified the code to exclude the patch when that macro
1404 is not defined.
1405
7102e136
PH
140655. Some experimental protocols are using DNS PTR records for new purposes. The
1407 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1408 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1409 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1410 CAN-2005-0021
7102e136 1411
3ca0ba97
PH
141256. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1413
c2bcbe20
PH
141457. Double the size of the debug message buffer (to 2048) so that more of very
1415 long debug lines gets shown.
1416
18ce445d
PH
141758. The exicyclog utility now does better if the number of log files to keep
1418 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1419
1f5b4c3d
PH
142059. Two changes related to the smtp_active_hostname option:
1421
1422 (1) $smtp_active_hostname is now available as a variable.
1423 (2) The default for smtp_banner uses $smtp_active_hostname instead
1424 of $primary_hostname.
1425
b975ba52
PH
142660. The host_aton() function is supposed to be passed a string that is known
1427 to be a valid IP address. However, in the case of IPv6 addresses, it was
1428 not checking this. This is a hostage to fortune. Exim now panics and dies
1429 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1430 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1431 components; fortuitously, this particular loophole had already been fixed
1432 by change 4.50/55 above.
1433
1434 If there are any other similar loopholes, the new check in host_aton()
1435 itself should stop them being exploited. The report I received stated that
1436 data on the command line could provoke the exploit when Exim was running as
1437 exim, but did not say which command line option was involved. All I could
1438 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1439 running as the user.
ea3a6f44 1440 CAN-2005-0021
85b87bc2
PH
1441
144261. There was a buffer overflow vulnerability in the SPA authentication code
1443 (which came originally from the Samba project). I have added a test to the
1444 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1445 CAN-2005-0022
b975ba52 1446
17ffcae7
PH
144762. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1448 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1449
d95f9fdb
PH
145063. The daemon start-up calls getloadavg() while still root for those OS that
1451 need the first call to be done as root, but it missed one case: when
1452 deliver_queue_load_max is set with deliver_drop_privilege. This is
1453 necessary for the benefit of the queue runner, because there is no re-exec
1454 when deliver_drop_privilege is set.
1455
86b8287f
PH
145664. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1457 This has been fixed.
1458
60dc5e56
PH
145965. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1460 was in use, was not putting the data itself into the right store pool;
1461 consequently, it could be overwritten for a subsequent message in the same
1462 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1463 the caching.)
1464
533244af
PH
146566. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1466
a5a28604
PH
146767. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1468 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1469 the function were treating the return as a boolean value, which happened to
1470 work because 0=false and not-0=true, but is not correct code.
1471
7e634d24
PH
147268. The host_aton() function was not handling scoped IPv6 addresses (those
1473 with, for example, "%eth0" on the end) correctly.
1474
3e11c26b
PH
147569. Fixed some compiler warnings in acl.c for the bitmaps specified with
1476 negated items (that is, ~something) in unsigned ints. Some compilers
1477 apparently mutter when there is no cast.
1478
6729cf78
PH
147970. If an address verification called from an ACL failed, and did not produce a
1480 user-specific message (i.e. there was only a "system" message), nothing was
1481 put in $acl_verify_message. In this situation, it now puts the system
1482 message there.
1483
00f00ca5
PH
148471. Change 4.23/11 added synchronization checking at the start of an SMTP
1485 session; change 4.31/43 added the unwanted input to the log line - except
1486 that it did not do this in the start of session case. It now does.
1487
c9bdd01c
PH
148872. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1489 This is wrong and can cause the other end to generate a synchronization
1490 error if it is another Exim or anything else that does the synchronization
1491 check. A QUIT command is no longer sent after a timeout.
1492
d43194df
PH
149373. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1494 during host lookups.
1495
fe5b5d0b
PH
149674. The defer_ok option of callout verification was not working if it was used
1497 when verifying addresses in header lines, that is, for this case:
1498
1499 verify = header_sender/callout=defer_ok
1500
76a2d7ba
PH
150175. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1502 those file descriptors could be used for SMTP connections. If anything
1503 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1504 could be sent to the SMTP client, causing chaos. The daemon now opens
1505 stdin, stdout, and stderr to /dev/null when it puts itself into the
1506 background.
1507
150876. Arrange for output from Perl's "warn" command to be written to Exim's main
1509 log by default. The user can override this with suitable Perl magic.
1510
04f7d5b9
PH
151177. The use of log_message on a "discard" ACL verb, which is supposed to add to
1512 the log message when discard triggers, was not working for the DATA ACL or
1513 for the non-SMTP ACL.
1514
bc60667e
PH
151578. Error message wording change in sieve.c.
1516
bb6e88ff
PH
151779. If smtp_accept_max_per_host was set, the number of connections could be
1518 restricted to fewer than expected, because the daemon was trying to set up
1519 a new connection before checking whether the processes handling previous
1520 connections had finished. The check for completed processes is now done
1521 earlier. On busy systems, this bug wouldn't be noticed because something
1522 else would have woken the daemon, and it would have reaped the completed
1523 process earlier.
1524
1e70f85b
PH
152580. If a message was submitted locally by a user whose login name contained one
1526 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1527 It caused a spool format error. I have fixed the spool reading code. A
1528 related problem was that the "from" clause in the Received: line became
1529 illegal because of the space(s). It is now covered by ${quote_local_part.
1530
153181. Included the latest eximstats from Steve (adds average sizes to HTML Top
1532 tables).
1533
4e01f9d6
PH
153482. Updated OS/Makefile-AIX as per message from Mike Meredith.
1535
1ee1cef2
PH
153683. Patch from Sieve maintainer to fix unterminated string problem in
1537 "vacation" handling.
1538
6e2b4ccc
PH
153984. Some minor changes to the Linux configuration files to help with other
1540 OS variants using glibc.
1541
8e669ac1
PH
154285. One more patch for Sieve to update vacation handling to latest spec.
1543
495ae4b0 1544
bbe902f0
PH
1545----------------------------------------------------
1546See the note above about the 4.44 and 4.50 releases.
1547----------------------------------------------------
1548
1549
1550Exim version 4.44
1551-----------------
1552
1553 1. Change 4.43/35 introduced a bug that caused file counts to be
1554 incorrectly computed when quota_filecount was set in an appendfile
1555 transport
1556
1557 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1558 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1559 place.
1560
1561 3. Give more explanation in the error message when the command for a transport
1562 filter fails to execute.
1563
1564 4. There are several places where Exim runs a non-Exim command in a
1565 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1566 was being done only for the command run by the queryprogram router. It is
1567 now done for all such subprocesses. The other cases are: ${run, transport
1568 filters, and the commands run by the lmtp and pipe transports.
1569
1570 5. Some older OS have a limit of 256 on the maximum number of file
1571 descriptors. Exim was using setrlimit() to set 1000 as a large value
1572 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1573 systems. I've change it so that if it can't get 1000, it tries for 256.
1574
1575 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1576 was an oversight, and furthermore, ever since the addition of extra
1577 controls (e.g. 4.43/32), the checks on when to allow different forms of
1578 "control" were broken. There should now be diagnostics for all cases when a
1579 control that does not make sense is encountered.
1580
1581 7. $recipients is now available in the predata ACL (oversight).
1582
1583 8. Tidy the search cache before the fork to do a delivery from a message
1584 received from the command line. Otherwise the child will trigger a lookup
1585 failure and thereby defer the delivery if it tries to use (for example) a
1586 cached ldap connection that the parent has called unbind on.
1587
1588 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1589 of $address_data from the recipient verification was clobbered by the
1590 sender verification.
1591
159210. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1593 was its contents. (It was OK if the option was not defined at all.)
1594
159511. A "Completed" log line is now written for messages that are removed from
1596 the spool by the -Mrm option.
1597
159812. $host_address is now set to the target address during the checking of
1599 ignore_target_hosts.
1600
160113. When checking ignore_target_hosts for an ipliteral router, no host name was
1602 being passed; this would have caused $sender_host_name to have been used if
1603 matching the list had actually called for a host name (not very likely,
1604 since this list is usually IP addresses). A host name is now passed as
1605 "[x.x.x.x]".
1606
160714. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1608 code that specifies a non-restarting handler (typically sigaction() in
1609 modern systems) in an attempt to fix a rare and obscure crash bug.
1610
161115. Narrowed the window for a race in the daemon that could cause it to ignore
1612 SIGCHLD signals. This is not a major problem, because they are used only to
1613 wake it up if nothing else does.
1614
161516. A malformed maildirsize file could cause Exim to calculate negative values
1616 for the mailbox size or file count. Odd effects could occur as a result.
1617 The maildirsize information is now recalculated if the size or filecount
1618 end up negative.
1619
162017. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1621 support for a long time. Removed HAVE_SYS_VFS_H.
1622
ea3a6f44 162318. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1624
162519. Allow an empty sender to be matched against a lookup in an address list.
1626 Previously the only cases considered were a regular expression, or an
1627 empty pattern.
1628
162920. Exim went into a mad DNS lookup loop when doing a callout where the
1630 host was specified on the transport, if the DNS lookup yielded more than
1631 one IP address.
1632
ea3a6f44
NM
163321. The RFC2047 encoding function was originally intended for short strings
1634 such as real names; it was not keeping to the 75-character limit for
1635 encoded words that the RFC imposes. It now respects the limit, and
1636 generates multiple encoded words if necessary. To be on the safe side, I
1637 have increased the buffer size for the ${rfc2047: expansion operator from
1638 1024 to 2048 bytes.
bbe902f0 1639
ea3a6f44
NM
164022. Failure to deliver a bounce message always caused it to be frozen, even if
1641 there was an errors_to setting on the router. The errors_to setting is now
1642 respected.
bbe902f0
PH
1643
164423. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1645 canonical form (fully expanded) before being placed in
1646 $sender_host_address.
1647
164824. Updated eximstats to version 1.33
1649
ea3a6f44
NM
165025. Include certificate and key file names in error message when GnuTLS fails
1651 to set them up, because the GnuTLS error message doesn't include the name
1652 of the failing file when there is a problem reading it.
bbe902f0
PH
1653
165426. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1655 As per change 25.
bbe902f0 1656
ea3a6f44
NM
165727. Reset the locale to "C" after calling embedded Perl, in case it was changed
1658 (this can affect the format of dates).
bbe902f0 1659
ea3a6f44
NM
166028. exim_tidydb, when checking for the continued existence of a message for
1661 which it has found a message-specific retry record, was not finding
1662 messages that were in split spool directories. Consequently, it was
1663 deleting retry records that should have stayed in existence.
bbe902f0
PH
1664
166529. eximstats updated to version 1.35
1666 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1667 1.35 - bugfix such that pie charts by volume are generated correctly
1668
ea3a6f44
NM
166930. The SPA authentication driver was not abandoning authentication and moving
1670 on to the next authenticator when an expansion was forced to fail,
1671 contradicting the general specification for all authenticators. Instead it
1672 was generating a temporary error. It now behaves as specified.
bbe902f0 1673
ea3a6f44
NM
167431. The default ordering of permitted cipher suites for GnuTLS was pessimal
1675 (the order specifies the preference for clients). The order is now AES256,
1676 AES128, 3DES, ARCFOUR128.
bbe902f0 1677
ea3a6f44
NM
167831. Small patch to Sieve code - explicitly set From: when generating an
1679 autoreply.
bbe902f0 1680
ea3a6f44
NM
168132. Exim crashed if a remote delivery caused a very long error message to be
1682 recorded - for instance if somebody sent an entire SpamAssassin report back
1683 as a large number of 550 error lines. This bug was coincidentally fixed by
1684 increasing the size of one of Exim's internal buffers (big_buffer) that
1685 happened as part of the Exiscan merge. However, to be on the safe side, I
1686 have made the code more robust (and fixed the comments that describe what
1687 is going on).
bbe902f0 1688
ea3a6f44
NM
168933. Some experimental protocols are using DNS PTR records for new purposes. The
1690 keys for these records are domain names, not reversed IP addresses. The
1691 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1692 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1693 CAN-2005-0021
1694
ea3a6f44
NM
169534. The host_aton() function is supposed to be passed a string that is known
1696 to be a valid IP address. However, in the case of IPv6 addresses, it was
1697 not checking this. This is a hostage to fortune. Exim now panics and dies
1698 if the condition is not met. A case was found where this could be provoked
1699 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1700 components; fortuitously, this particular loophole had already been fixed
1701 by change 4.50/55 or 4.44/33 above.
1702
1703 If there are any other similar loopholes, the new check in host_aton()
1704 itself should stop them being exploited. The report I received stated that
1705 data on the command line could provoke the exploit when Exim was running as
1706 exim, but did not say which command line option was involved. All I could
1707 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1708 running as the user.
bbe902f0
PH
1709 CAN-2005-0021
1710
ea3a6f44
NM
171135. There was a buffer overflow vulnerability in the SPA authentication code
1712 (which came originally from the Samba project). I have added a test to the
1713 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1714 CAN-2005-0022
1715
ea3a6f44
NM
171636. The daemon start-up calls getloadavg() while still root for those OS that
1717 need the first call to be done as root, but it missed one case: when
1718 deliver_queue_load_max is set with deliver_drop_privilege. This is
1719 necessary for the benefit of the queue runner, because there is no re-exec
1720 when deliver_drop_privilege is set.
bbe902f0 1721
ea3a6f44
NM
172237. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1723 was in use, was not putting the data itself into the right store pool;
1724 consequently, it could be overwritten for a subsequent message in the same
1725 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1726 the caching.)
bbe902f0 1727
ea3a6f44
NM
172838. Sometimes the final signoff response after QUIT could fail to get
1729 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1730 < 0 before doing a fflush(). This bug looks as though it goes back to the
1731 introduction of TLS in release 3.20, but "sometimes" must have been rare
1732 because the tests only now provoked it.
bbe902f0
PH
1733
1734
495ae4b0
PH
1735Exim version 4.43
1736-----------------
1737
1738 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1739 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1740 Now it returns an integer. A number of calls were still expecting a T/F
1741 return. Fortuitously, in all cases, the tests worked in OK situations,
1742 which is the norm. However, things would have gone wrong on any write
1743 failures on the smtp file descriptor. This function is used when sending
1744 messages over SMTP and also when doing verify callouts.
1745
1746 2. When Exim is called to do synchronous delivery of a locally submitted
1747 message (the -odf or -odi options), it no longer closes stderr before doing
1748 the delivery.
1749
1750 3. Implemented the mua_wrapper option.
1751
1752 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1753
1754 5. Implemented the functions header_remove(), header_testname(),
1755 header_add_at_position(), and receive_remove_recipient(), and exported them
1756 to local_scan().
1757
1758 6. If an ACL "warn" statement specified the addition of headers, Exim already
1759 inserted X-ACL-Warn: at the start if there was no header name. However, it
1760 was not making this test for the second and subsequent header lines if
1761 there were newlines in the string. This meant that an invalid header could
1762 be inserted if Exim was badly configured.
1763
1764 7. Allow an ACL "warn" statement to add header lines at the start or after all
1765 the Received: headers, as well as at the end.
1766
1767 8. Added the rcpt_4xx retry error code.
1768
1769 9. Added postmaster_mailfrom=xxx to callout verification option.
1770
177110. Added mailfrom=xxxx to the callout verification option, for verify=
1772 header_sender only.
1773
177411. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1775 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1776
177712. Inserted some casts to stop certain compilers warning when using pointer
1778 differences as field lengths or precisions in printf-type calls (mostly
1779 affecting debugging statements).
1780
178113. Added optional readline() support for -be (dynamically loaded).
1782
178314. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1784 same clock tick as a message's arrival, so that its received time was the
1785 same as the "first fail" time on the retry record, and that message
1786 remained on the queue past the ultimate address timeout, every queue runner
1787 would try a delivery (because it was past the ultimate address timeout) but
1788 after another failure, the ultimate address timeout, which should have then
1789 bounced the address, did not kick in. This was a "< instead of <=" error;
1790 in most cases the first failure would have been in the next clock tick
1791 after the received time, and all would be well.
1792
179315. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1794 being recognized when the domain list was tested by the match_domain
1795 condition in an expansion string.
1796
179716. Added the ${str2b64: operator.
1798
179917. Exim was always calling setrlimit() to set a large limit for the number of
1800 processes, without checking whether the existing limit was already
1801 adequate. (It did check for the limit on file descriptors.) Furthermore,
1802 errors from getrlimit() and setrlimit() were being ignored. Now they are
1803 logged to the main and panic logs, but Exim does carry on, to try to do its
1804 job under whatever limits there are.
1805
180618. Imported PCRE 5.0.
1807
180819. Trivial typo in log message " temporarily refused connection" (the leading
1809 space).
1810
181120. If the log selector return_path_on_delivery was set and an address was
1812 redirected to /dev/null, the delivery process crashed because it assumed
1813 that a return path would always be set for a "successful" delivery. In this
1814 case, the whole delivery is bypassed as an optimization, and therefore no
1815 return path is set.
1816
181721. Internal re-arrangement: the function for sending a challenge and reading
1818 a response while authentication was assuming a zero-terminated challenge
1819 string. It's now changed to take a pointer and a length, to allow for
1820 binary data in such strings.
1821
182222. Added the cyrus_sasl authenticator (code supplied by MBM).
1823
182423. Exim was not respecting finduser_retries when seeking the login of the
1825 uid under which it was called; it was always trying 10 times. (The default
1826 setting of finduser_retries is zero.) Also, it was sleeping after the final
1827 failure, which is pointless.
1828
182924. Implemented tls_on_connect_ports.
1830
183125. Implemented acl_smtp_predata.
1832
183326. If the domain in control=submission is set empty, Exim assumes that the
1834 authenticated id is a complete email address when it generates From: or
1835 Sender: header lines.
1836
183727. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1838 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1839 chown and chgrp in /bin and hostname in /usr/bin.
1840
184128. Exim was keeping the "process log" file open after each use, just as it
1842 does for the main log. This opens the possibility of it remaining open for
1843 long periods when the USR1 signal hits a daemon. Occasional processlog
1844 errors were reported, that could have been caused by this. Anyway, it seems
1845 much more sensible not to leave this file open at all, so that is what now
1846 happens.
1847
184829. The long-running daemon process does not normally write to the log once it
1849 has entered its main loop, and it closes the log before doing so. This is
1850 so that log files can straightforwardly be renamed and moved. However,
1851 there are a couple of unusual error situations where the daemon does write
1852 log entries, and I had neglected to close the log afterwards.
1853
185430. The text of an SMTP error response that was received during a remote
1855 delivery was being truncated at 512 bytes. This is too short for some of
1856 the long messages that one sometimes sees. I've increased the limit to
1857 1024.
1858
185931. It is now possible to make retry rules that apply only when a message has a
1860 specific sender, in particular, an empty sender.
1861
186232. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1863 it possible to be selective about when SMTP synchronization is enforced.
1864
186533. Added "control = caseful_local_part" and "control = "caselower_local_part".
1866
186732. Implemented hosts_connection_nolog.
1868
186933. Added an ACL for QUIT.
1870
187134. Setting "delay_warning=" to disable warnings was not working; it gave a
1872 syntax error.
1873
187435. Added mailbox_size and mailbox_filecount to appendfile.
1875
187636. Added control = no_multiline_responses to ACLs.
1877
187837. There was a bug in the logic of the code that waits for the clock to tick
1879 in the case where the clock went backwards by a substantial amount such
1880 that the microsecond fraction of "now" was more than the microsecond
1881 fraction of "then" (but the whole seconds number was less).
1882
188338. Added support for the libradius Radius client library this is found on
1884 FreeBSD (previously only the radiusclient library was supported).
1885
1886
1887Exim version 4.42
1888-----------------
1889
1890 1. When certain lookups returned multiple values in the form name=value, the
1891 quoting of the values was not always being done properly. Specifically:
1892 (a) If the value started with a double quote, but contained no whitespace,
1893 it was not quoted.
1894 (b) If the value contained whitespace other than a space character (i.e.
1895 tabs or newlines or carriage returns) it was not quoted.
1896 This fix has been applied to the mysql and pgsql lookups by writing a
1897 separate quoting function and calling it from the lookup code. The fix
1898 should probably also be applied to nisplus, ibase and oracle lookups, but
1899 since I cannot test any of those, I have not disturbed their existing code.
1900
1901 2. A hit in the callout cache for a specific address caused a log line with no
1902 reason for rejecting RCPT. Now it says "Previous (cached) callout
1903 verification failure".
1904
1905 3. There was an off-by-one bug in the queryprogram router. An over-long
1906 return line was truncated at 256 instead of 255 characters, thereby
1907 overflowing its buffer with the terminating zero. As well as fixing this, I
1908 have increased the buffer size to 1024 (and made a note to document this).
1909
1910 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1911 when Exim is waiting for an SMTP response from a remote server, Exim
1912 restarts its select() call on the socket, thereby resetting its timeout.
1913 This is not a problem when such interrupts are rare. Somebody set up a cron
1914 job to run exiwhat every 2 minutes, which is less than the normal select()
1915 timeout (5 or 10 minutes). This meant that the select() timeout never
1916 kicked in because it was always reset. I have fixed this by comparing the
1917 time when an interrupt arrives with the time at the start of the first call
1918 to select(). If more time than the timeout has elapsed, the interrupt is
1919 treated as a timeout.
1920
1921 5. Some internal re-factoring in preparation for the addition of Sieve
1922 extensions (by MH). In particular, the "personal" test is moved to a
1923 separate function, and given an option for scanning Cc: and Bcc: (which is
1924 not set for Exim filters).
1925
1926 6. When Exim created an email address using the login of the caller as the
1927 local part (e.g. when creating a From: or Sender: header line), it was not
1928 quoting the local part when it contained special characters such as @.
1929
1930 7. Installed new OpenBSD configuration files.
1931
1932 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1933 try to make them clearer.
1934
1935 9. Callout options, other than the timeout value, were being ignored when
1936 verifying sender addresses in header lines. For example, when using
1937
1938 verify = header_sender/callout=no_cache
1939
1940 the cache was (incorrectly) being used.
1941
194210. Added a missing instance of ${EXE} to the exim_install script; this affects
1943 only the Cygwin environment.
1944
194511. When return_path_on_delivery was set as a log selector, if different remote
1946 addresses in the same message used different return paths and parallel
1947 remote delivery occurred, the wrong values would sometimes be logged.
1948 (Whenever a remote delivery process finished, the return path value from
1949 the most recently started remote delivery process was logged.)
1950
195112. RFC 3848 specifies standard names for the "with" phrase in Received: header
1952 lines when AUTH and/or TLS are in use. This is the "received protocol"
1953 field. Exim used to use "asmtp" for authenticated SMTP, without any
1954 indication (in the protocol name) for TLS use. Now it follows the RFC and
1955 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1956 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1957 names appear in log lines as well as in Received: header lines.
1958
195913. Installed MH's patches for Sieve to add the "copy" and "vacation"
1960 extensions, and comparison tests, and to fix some bugs.
1961
196214. Changes to the "personal" filter test:
1963
1964 (1) The test was buggy in that it was just doing the equivalent of
1965 "contains" tests on header lines. For example, if a user's address was
1966 anne@some.where, the "personal" test would incorrectly be true for
1967
1968 To: susanne@some.where
1969
1970 This test is now done by extracting each address from the header in turn,
1971 and checking the entire address. Other tests that are part of "personal"
1972 are now done using regular expressions (for example, to check local parts
1973 of addresses in From: header lines).
1974
1975 (2) The list of non-personal local parts in From: addresses has been
1976 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1977 taken from the Sieve specification recommendations.
1978
1979 (3) If the message contains any header line starting with "List-" it is
1980 treated as non-personal.
1981
1982 (4) The test for "circular" in the Subject: header line has been removed
1983 because it now seems ill-conceived.
1984
198515. Minor typos in src/EDITME comments corrected.
1986
198716. Installed latest exipick from John Jetmore.
1988
198917. If headers_add on a router specified a text string that was too long for
1990 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1991 of string_sprintf() is now avoided.
1992
199318. $message_body_size was not set (it was always zero) when running the DATA
1994 ACL and the local_scan() function.
1995
199619. For the "mail" command in an Exim filter, no default was being set for
1997 the once_repeat time, causing a random time value to be used if "once" was
1998 specified. (If the value happened to be <= 0, no repeat happened.) The
1999 default is now 0s, meaning "never repeat". The "vacation" command was OK
2000 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2001 (I found it when inspecting the code).
2002
200320. There is now an overall timeout for performing a callout verification. It
2004 defaults to 4 times the callout timeout, which applies to individual SMTP
2005 commands during the callout. The overall timeout applies when there is more
2006 than one host that can be tried. The timeout is checked before trying the
2007 next host. This prevents very long delays if there are a large number of
2008 hosts and all are timing out (e.g. when the network connections are timing
2009 out). The value of the overall timeout can be changed by specifying an
2010 additional sub-option for "callout", called "maxwait". For example:
2011
2012 verify = sender/callout=5s,maxwait=20s
2013
201421. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2015 to the end before writing, but this should make it even safer).
2016
201722. Exim was forgetting that it had advertised PIPELINING for the second and
2018 subsequent messages on an SMTP connection. It was also not resetting its
2019 memory on STARTTLS and an internal HELO.
2020
202123. When Exim logs an SMTP synchronization error within a session, it now
2022 records whether PIPELINING has been advertised or not.
2023
202424. Added 3 instances of "(long int)" casts to time_t variables that were being
2025 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2026 rather than long int.
2027
202825. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2029
203026. Added the never_mail option to autoreply.
2031
2032
2033Exim version 4.41
2034-----------------
2035
2036 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2037 crash if the getsockname() call failed; this can happen if a connection is
2038 closed very soon after it is established. The problem was simply in the
2039 order in which certain operations were done, causing Exim to try to write
2040 to the SMTP stream before it had set up the file descriptor. The bug has
2041 been fixed by making things happen in the correct order.
2042
2043
2044Exim version 4.40
2045-----------------
2046
2047 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2048 before the connection was closed, thus losing the rejection response.
2049
2050 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2051 some early Solaris releases, but causes trouble in current releases where
2052 socklen_t is defined.
2053
2054 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2055 always exist.
2056
2057 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2058 configured.
2059
2060 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2061 that releasing the top of it at the end releases what was used for sub-
2062 expansions (unless the block got too big). However, discard this block if
2063 the first thing is a variable or header, so that we can use its block when
2064 it is dynamic (useful for very large $message_headers, for example).
2065
2066 6. Lookups now cache *every* query, not just the most recent. A new, separate
2067 store pool is used for this. It can be recovered when all lookup caches are
2068 flushed. Lookups now release memory at the end of their result strings.
2069 This has involved some general refactoring of the lookup sources.
2070
2071 7. Some code has been added to the store_xxx() functions to reduce the amount
2072 of flapping under certain conditions.
2073
2074 8. log_incoming_interface used to affect only the <= reception log lines. Now
2075 it causes the local interface and port to be added to several more SMTP log
2076 lines, for example "SMTP connection from", and rejection lines.
2077
2078 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2079
208010. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2081
208211. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2083 could be overwritten at the end of the current message (or the start of a
2084 new message if it was set in a HELO ACL). The value is now preserved for
2085 the duration of the SMTP connection.
2086
208712. If a transport had a headers_rewrite setting, and a matching header line
2088 contained an unqualified address, that address was qualified, even if it
2089 did not match any rewriting rules. The underlying bug was that the values
2090 of the flags that permit the existence of unqualified sender and recipient
2091 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2092 non-local messages, and by -bnq for local messages) were not being
2093 preserved with the message after it was received.
2094
209513. When Exim was logging an SMTP synchronization error, it could sometimes log
2096 "next input=" as part of the text comprising the host identity instead of
2097 the correct text. The code was using the same buffer for two different
2098 strings. However, depending on which order the printing function evaluated
2099 its arguments, the bug did not always show up. Under Linux, for example, my
2100 test suite worked just fine.
2101
210214. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2103 doesn't work with some older versions of Perl. It has been changed to "my",
2104 which in any case is probably the better facility to use.
2105
210615. A really picky compiler found some instances of statements for creating
2107 error messages that either had too many or two few arguments for the format
2108 string.
2109
211016. The size of the buffer for calls to the DNS resolver has been increased
2111 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2112 for addresses that have a lot of PTR records. This alleviates a problem; it
2113 does not fully solve it.
2114
211517. A dnsdb lookup for PTR records that receives more data than will fit in the
2116 buffer now truncates the list and logs the incident, which is the same
2117 action as happens when Exim is looking up a host name and its aliases.
2118 Previously in this situation something unpredictable would happen;
2119 sometimes it was "internal error: store_reset failed".
2120
212118. If a server dropped the connection unexpectedly when an Exim client was
2122 using GnuTLS and trying to read a response, the client delivery process
2123 crashed while trying to generate an error log message.
2124
212519. If a "warn" verb in an ACL added multiple headers to a message in a single
2126 string, for example:
2127
2128 warn message = H1: something\nH2: something
2129
2130 the text was added as a single header line from Exim's point of view
2131 though it ended up OK in the delivered message. However, searching for the
2132 second and subsequent header lines using $h_h2: did not work. This has been
2133 fixed. Similarly, if a system filter added multiple headers in this way,
2134 the routers could not see them.
2135
213620. Expanded the error message when iplsearch is called with an invalid key to
2137 suggest using net-iplsearch in a host list.
2138
213921. When running tests using -bh, any delays imposed by "delay" modifiers in
2140 ACLs are no longer actually imposed (and a message to that effect is
2141 output).
2142
214322. If a "gecos" field in a passwd entry contained escaped characters, in
2144 particular, if it contained a \" sequence, Exim got it wrong when building
2145 a From: or a Sender: header from that name. A second bug also caused
2146 incorrect handling when an unquoted " was present following a character
2147 that needed quoting.
2148
214923. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2150 was not being matched caselessly.
2151
215224. Arranged for all hyphens in the exim.8 source to be escaped with
2153 backslashes.
2154
215525. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2156 properly. Recipient callout cache records were still being keyed to include
2157 the sender, even when use_sender was set false. This led to far more
2158 callouts that were necessary. The sender is no longer included in the key
2159 when use_sender is false.
2160
216126. Added "control = submission" modifier to ACLs.
2162
216327. Added the ${base62d: operator to decode base 62 numbers.
2164
216528. dnsdb lookups can now access SRV records.
2166
216729. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2168 the configuration file.
2169
217030. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2171 (-v) mode. This makes the output for a verbose queue run more intelligible.
2172
217331. Added a use_postmaster feature to recipient callouts.
2174
217532. Added the $body_zerocount variable, containing the number of binary zero
2176 bytes in the message body.
2177
217833. The time of last modification of the "new" subdirectory is now used as the
2179 "mailbox time last read" when there is a quota error for a maildir
2180 delivery.
2181
218234. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2183
218435. Added +ignore_unknown as a special item in host lists.
2185
218636. Code for decoding IPv6 addresses in host lists is now included, even if
2187 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2188 address was recognized as an IP address, but was then not correctly decoded
2189 into binary, causing unexpected and incorrect effects when compared with
2190 another IP address.
2191
2192
2193Exim version 4.34
2194-----------------
2195
2196 1. Very minor rewording of debugging text in manualroute to say "list of
2197 hosts" instead of "hostlist".
2198
2199 2. If verify=header_syntax was set, and a header line with an unqualified
2200 address (no domain) and a large number of spaces between the end of the
2201 name and the colon was received, the reception process suffered a buffer
2202 overflow, and (when I tested it) crashed. This was caused by some obsolete
2203 code that should have been removed. The fix is to remove it!
2204
2205 3. When running in the test harness, delay a bit after writing a bounce
2206 message to get a bit more predictability in the log output.
2207
2208 4. Added a call to search_tidyup() just before forking a reception process. In
2209 theory, someone could use a lookup in the expansion of smtp_accept_max_
2210 per_host which, without the tidyup, could leave open a database connection.
2211
2212 5. Added the variables $recipient_data and $sender_data which get set from a
2213 lookup success in an ACL "recipients" or "senders" condition, or a router
2214 "senders" option, similar to $domain_data and $local_part_data.
2215
2216 6. Moved the writing of debug_print from before to after the "senders" test
2217 for routers.
2218
2219 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2220 problems for message scanning, either using a data ACL, or using
2221 local_scan() because the Received: header was not generated till after they
2222 were called (in order to set the time as the time of reception completion).
2223 I have revised the way this works. The header is now generated after the
2224 body is received, but before the ACL or local_scan() are called. After they
2225 are run, the timestamp in the header is updated.
2226
2227
2228Exim version 4.33
2229-----------------
2230
2231 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2232 before starting a queue runner without re-exec. This happened only when
2233 deliver_drop_privilege was set or when the Exim user was set to root. The
2234 effect of the bug was that timeouts during subsequent deliveries caused
2235 crashes instead of being properly handled. The handler is now left at its
2236 default (and expected) setting.
2237
2238 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2239 message, again when deliver_drop_privilege is set or Exim is run as root.
2240 The bug described in (1) was not present in this case, but the tidying up
2241 of the other signals was missing. I have made the two cases consistent.
2242
2243 3. The ignore_target_hosts setting on a manualroute router was being ignored
2244 for hosts that were looked up using the /MX notation.
2245
2246 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2247 in domain lists.
2248
2249 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2250 operated on the sender address. After changing the $sender_address to <>
2251 for the sender address verify, Exim was re-instated it as the original
2252 (before rewriting) address, but remembering that it had rewritten it, so it
2253 wasn't rewriting it again. This bug also had the effect of breaking the
2254 sender address verification caching when the sender address was rewritten.
2255
2256 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2257 This has been changed so that if the ip literal address matches
2258 ignore_target_hosts, the router declines.
2259
2260 7. Added expansion conditions match_domain, match_address, and match_local_
2261 part (NOT match_host).
2262
2263 8. The placeholder for the Received: header didn't have a length field set.
2264
2265 9. Added code to Exim itself and to exim_lock to test for a specific race
2266 condition that could lead to file corruption when using MBX delivery. The
2267 issue is with the lockfile that is created in /tmp. If this file is removed
2268 after a process has opened it but before that process has acquired a lock,
2269 there is the potential for a second process to recreate the file and also
2270 acquire a lock. This could lead to two Exim processes writing to the file
2271 at the same time. The added code performs the same test as UW imapd; it
2272 checks after acquiring the lock that its file descriptor still refers to
2273 the same named file.
2274
227510. The buffer for building added header lines was of fixed size, 8192 bytes.
2276 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2277 when Exim is built.
2278
227911. Added the smtp_active_hostname option. If used, this will typically be made
2280 to depend on the incoming interface address. Because $interface_address is
2281 not set up until the daemon has forked a reception process, error responses
2282 that can happen earlier (such as "too many connections") no longer contain
2283 a host name.
2284
228512. If an expansion in a condition on a "warn" statement fails because a lookup
2286 defers, the "warn" statement is abandoned, and the next ACL statement is
2287 processed. Previously this caused the whole ACL to be aborted.
2288
228913. Added the iplsearch lookup type.
2290
229114. Added ident_timeout as a log selector.
2292
229315. Added tls_certificate_verified as a log selector.
2294
229516. Added a global option tls_require_ciphers (compare the smtp transport
2296 option of the same name). This controls incoming TLS connections.
2297
229817. I finally figured out how to make tls_require_ciphers do a similar thing
2299 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2300 before starting the TLS session.
2301
230218. Tabs are now shown as \t in -bP output.
2303
230419. If the log selector return_path_on_delivery was set, Exim crashed when
2305 bouncing a message because it had too many Received: header lines.
2306
230720. If two routers both had headers_remove settings, and the first one included
2308 a superfluous trailing colon, the final name in the first list and the
2309 first name in the second list were incorrectly joined into one item (with a
2310 colon in the middle).
2311
2312
2313Exim version 4.32
2314-----------------
2315
2316 1. Added -C and -D options to the exinext utility, mainly to make it easier
2317 to include in the automated testing, but these could be helpful when
2318 multiple configurations are in use.
2319
2320 2. The exinext utility was not formatting the output nicely when there was
2321 an alternate port involved in the retry record key, nor when there was a
2322 message id as well (for retries that were specific to a specific message
2323 and a specific host). It was also confused by IPv6 addresses, because of
2324 the additional colons they contain. I have fixed the IPv4 problem, and
2325 patched it up to do a reasonable job for IPv6.
2326
2327 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2328 delivery, the log line now contains "pipelined" if PIPELINING was used.
2329
2330 4. An SMTP transport process used to panic and die if the bind() call to set
2331 an explicit outgoing interface failed. This has been changed; it is now
2332 treated in the same way as a connect() failure.
2333
2334 5. A reference to $sender_host_name in the part of a conditional expansion
2335 that was being skipped was still causing a DNS lookup. This no longer
2336 occurs.
2337
2338 6. The def: expansion condition was not recognizing references to header lines
2339 that used bh_ and bheader_.
2340
2341 7. Added the _cache feature to named lists.
2342
2343 8. The code for checking quota_filecount in the appendfile transport was
2344 allowing one more file than it should have been.
2345
2346 9. For compatibility with Sendmail, the command line option
2347
2348 -prval:sval
2349
2350 is equivalent to
2351
2352 -oMr rval -oMs sval
2353
2354 and sets the incoming protocol and host name (for trusted callers). The
2355 host name and its colon can be omitted when only the protocol is to be set.
2356 Note the Exim already has two private options, -pd and -ps, that refer to
2357 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2358 "s", but I don't think that's a major issue.
2359
236010. A number of refactoring changes to the code, none of which should affect
2361 Exim's behaviour:
2362
2363 (a) The number of logging options was getting close to filling up the
2364 32-bit word that was used as a bit map. I have split them into two classes:
2365 those that are passed in the argument to log_write(), and those that are
2366 only ever tested independently outside of that function. These are now in
2367 separate 32-bit words, so there is plenty of room for expansion again.
2368 There is no change in the user interface or the logging behaviour.
2369
2370 (b) When building, for example, log lines, the code previously used a
2371 macro that called string_cat() twice, in order to add two strings. This is
2372 not really sufficiently general. Furthermore, there was one instance where
2373 it was actually wrong because one of the argument was used twice, and in
2374 one call a function was used. (As it happened, calling the function twice
2375 did not affect the overall behaviour.) The macro has been replaced by a
2376 function that can join an arbitrary number of extra strings onto a growing
2377 string.
2378
2379 (c) The code for expansion conditions now uses a table and a binary chop
2380 instead of a serial search (which was left over from when there were very
2381 few conditions). Also, it now recognizes conditions like "pam" even when
2382 the relevant support is not compiled in: a suitably worded error message is
2383 given if an attempt is made to use such a condition.
2384
238511. Added ${time_interval:xxxxx}.
2386
238712. A bug was causing one of the ddress fields not to be passed back correctly
2388 from remote delivery subprocesses. The field in question was not being
2389 subsequently used, so this caused to problems in practice.
2390
239113. Added new log selectors queue_time and deliver_time.
2392
239314. Might have fixed a bug in maildirsizefile handling that threw up
2394 "unexpected character" debug warnings, and recalculated the data
2395 unnecessarily. In any case, I expanded the warning message to give more
2396 information.
2397
239815. Added the message "Restricted characters in address" to the statements in
2399 the default ACL that block characters like @ and % in local parts.
2400
240116. Change 71 for release 4.31 proved to be much less benign that I imagined.
2402 Three changes have been made:
2403
2404 (a) There was a serious bug; a negative response to MAIL caused the whole
2405 recipient domain to be cached as invalid, thereby blocking all messages
2406 to all local parts at the same domain, from all senders. This bug has
2407 been fixed. The domain is no longer cached after a negative response to
2408 MAIL if the sender used is not empty.
2409
2410 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2411 been restored.
2412
2413 (c) A new callout option, "use_sender" has been added for people who want
2414 the modified behaviour.
2415
2416
2417Exim version 4.31
2418-----------------
2419
2420 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2421 Larry Rosenman.
2422
2423 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2424 indeed breaks things for older releases.
2425
2426 3. Added additional logging to the case where there is a problem reading data
2427 from a filter that is running in a subprocess using a pipe, in order to
2428 try to track down a specific problem.
2429
2430 4. Testing facility fudge: when running in the test harness and attempting
2431 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2432 getting "No route to host". Convert this to a timeout.
2433
2434 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2435 warning.
2436
2437 6. Some OS don't have socklen_t but use size_t instead. This affects the
2438 fifth argument of getsockopt() amongst other things. This is now
2439 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2440 can be set for individual OS. I have set it for SunOS5, OSF1, and
2441 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2442 some earlier ones do not.
2443
2444 7. Change 4.30/15 was not doing the test caselessly.
2445
2446 8. The standard form for an IPv6 address literal was being rejected by address
2447 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2448 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2449 this, as well as the form without the "IPv6" on the front (but only when
2450 address literals are enabled, of course).
2451
2452 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2453
245410. Exim crashed if a message with an empty sender address specified by -f
2455 encountered a router with an errors_to setting. This could be provoked only
2456 by a command such as
2457
2458 exim -f "" ...
2459
2460 where an empty string was supplied; "<>" did not hit this bug.
2461
246211. Installed PCRE release 4.5.
2463
246412. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2465 remained set. It is now erased.
2466
246713. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2468 times from message ids (which are base 36 rather than the normal 62).
2469
247014. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2471 were being counted as actual protocol errors, and logged if the log
2472 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2473 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2474 and DATA following a set of rejected RCPTs do not count as protocol errors.
2475 In other words, Exim assumes they were pipelined, though this may not
2476 actually be the case. Of course, in all cases the client gets an
2477 appropriate error code.
2478
247915. If a lookup fails in an ACL condition, a message about the failure may
2480 be available; it is used if testing the ACL cannot continue, because most
2481 such messages specify what the cause of the deferral is. However, some
2482 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2483 that caused an old message to be retained and used if a later statement
2484 caused a defer, replacing the real cause of the deferral.
2485
248616. If an IP address had so many PTR records that the DNS lookup buffer
2487 was not large enough to hold them, Exim could crash while trying to process
2488 the truncated data. It now detects and logs this case.
2489
249017. Further to 4.21/58, another change has been made: if (and only if) the
2491 first line of a message (the first header line) ends with CRLF, a bare LF
2492 in a subsequent header line has a space inserted after it, so as not to
2493 terminate the header.
2494
249518. Refactoring: tidied an ugly bit of code in appendfile that copied data
2496 unnecessarily, used atoi() instead of strtol(), and didn't check the
2497 termination when getting file sizes from file names by regex.
2498
249919. Completely re-implemented the support for maildirsize files, in the light
2500 of a number of problems with the previous contributed implementation
2501 (4.30/29). In particular:
2502
2503 . If the quota is zero, the maildirsize file is maintained, but no quota is
2504 imposed.
2505
2506 . If the maildir directory does not exist, it is created before any attempt
2507 to write a maildirsize file.
2508
2509 . The quota value in the file is just a cache; if the quota is changed in
2510 the transport, the new value overrides.
2511
2512 . A regular expression is available for excluding directories from the
2513 count.
2514
251520. The autoreply transport checks the characters in options that define the
2516 message's headers; it allows continued headers, but it was checking with
2517 isspace() after an embedded newline instead of explicitly looking for a
2518 space or a tab.
2519
252021. If all the "regular" hosts to which an address was routed had passed their
2521 expiry times, and had not reached their retry times, the address was
2522 bounced, even if fallback hosts were defined. Now Exim should go on to try
2523 the fallback hosts.
2524
252522. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2526 equivalent code in the SMTP transport. Some hosts send humungous responses
2527 to HELO/EHLO, more than 1024 it seems.
2528
252923. Refactoring: code in filter.c used (void *) for "any old type" but this
2530 gives compiler warnings in some environments. I've now done it "properly",
2531 using a union.
2532
253324. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2534 (because of problems with the built-in one) was declared to return uschar *
2535 instead of char *, causing compiler failure.
2536
253725. Fixed a file descriptor leak when processing alias/forward files.
2538
253926. Fixed a minor format string issue in dbfn.c.
2540
254127. Typo in exim.c: ("dmbnz" for "dbmnz").
2542
254328. If a filter file refered to $h_xxx or $message_headers, and the headers
2544 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2545 become corrupted.
2546
254729. When a sender address is verified, it is cached, to save repeating the test
2548 when there is more than one recipient in a message. However, when the
2549 verification involves a callout, it is possible for different callout
2550 options to be set for different recipients. It is too complicated to keep
2551 track of this in the cache, so now Exim always runs a verification when a
2552 callout is required, relying on the callout cache for the optimization.
2553 The overhead is duplication of the address routing, but this should not be
2554 too great.
2555
255630. Fixed a bug in callout caching. If a RCPT command caused the sender address
2557 to be verified with callout=postmaster, and the main callout worked but the
2558 postmaster check failed, the verification correctly failed. However, if a
2559 subsequent RCPT command asked for sender verification *without* the
2560 postmaster check, incorrect caching caused this verification also to fail,
2561 incorrectly.
2562
256331. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2564 it was not caching the DNS options (qualify_single, search_parents) that
2565 were used when the lookup failed. A subsequent lookup with different
2566 options therefore always gave the same answer, though there were cases
2567 where it should not have. (Example: a "domains = !$mx_any" option on a
2568 dnslookup router: the "domains" option is always processed without any
2569 widening, but the router might have qualify_single set.) Now Exim uses the
2570 cached value only when the same options are set.
2571
257232. Added John Jetmore's "exipick" utility to the distribution.
2573
257433. GnuTLS: When an attempt to start a TLS session fails for any reason other
2575 than a timeout (e.g. a certificate is required, and is not provided), an
2576 Exim server now closes the connection immediately. Previously it waited for
2577 the client to close - but if the client is SSL, it seems that they each
2578 wait for each other, leading to a delay before one of them times out.
2579
258034: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2581 maintained 0.8.x compatibility because I don't think many are using it, and
2582 it is clearly obsolete.
2583
258435. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2585 transport.
2586
258736. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2588 client certificate was expired. A simple patch fixes this, though I don't
2589 understand the full logic of why the verify callback is called multiple
2590 times.
2591
259237. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2593 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2594 which causes problems with some clients (such as the Certicom SSL Plus
2595 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2596 disables the coutermeasure allowing Eudora to connect."
2597
259838. Exim was not checking that a write() to a log file succeeded. This could
2599 lead to Bad Things if a log got too big, in particular if it hit a file
2600 size limit. Exim now panics and dies if it cannot write to a log file, just
2601 as it does if it cannot open a log file.
2602
260339. Modified OS/Makefile-Linux so that it now contains
2604
2605 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2606
2607 The two -D definitions ensure that Exim is compiled with large file
2608 support, which makes it possible to handle log files that are bigger than
2609 2^31.
2610
261140. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2612 instance) a domain was checked against a named list that involved a lookup,
2613 causing $domain_data to be set, then another domain was checked against the
2614 same list, then the first domain was re-checked, the value of $domain_data
2615 after the final check could be wrong. In particular, if the second check
2616 failed, it could be set empty. This bug probably also applied to
2617 $localpart_data.
2618
261941. The strip_trailing_dot option was not being applied to the address given
2620 with the -f command-line option.
2621
262242. The code for reading a message's header from the spool was incrementing
2623 $received_count, but never initializing it. This meant that the value was
2624 incorrect (doubled) while delivering a message in the same process in which
2625 it was received. In the most common configuration of Exim, this never
2626 happens - a fresh exec is done - but it can happen when
2627 deliver_drop_privilege is set.
2628
262943. When Exim logs an SMTP synchronization error - client data sent too soon -
2630 it now includes up to 150 characters of the unexpected data in the log
2631 line.
2632
263344. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2634 and building data strings. The size of both of these buffers was 10 000
2635 bytes - far larger than anybody would *ever* want, thought I. Needless to
2636 say, somebody hit the limit. I have increased the maximum line length to
2637 20 000 and the maximum data length of concatenated lines to 100 000. I have
2638 also fixed two bugs, because there was no checking on these buffers. Tsk,
2639 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2640 buffer is too small.
2641
264245. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2643 lsearch lookups. Now it does.
2644
264546. When parsing a route_list item in a manualroute router, a fixed-length
2646 buffer was used for the list of hosts. I made this 1024 bytes long,
2647 thinking that nobody would ever have a list of hosts that long. Wrong.
2648 Somebody had a whole pile of complicated expansion conditions, and the
2649 string was silently truncated, leading to an expansion error. It turns out
2650 that it is easier to change to an unlimited length (owing to other changes
2651 that have happened since this code was originally written) than to build
2652 structure for giving a limitation error. The length of the item that
2653 expands into the list of hosts is now unlimited.
2654
265547. The lsearch lookup could not handle data where the length of text line was
2656 more than 4095 characters. Such lines were truncated, leading to shortened
2657 data being returned. It should now handle lines of any length.
2658
265948. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2660 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2661 ACL").
2662
266349. Cosmetic tidy to scripts like exicyclog that are generated by globally
2664 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2665 no longer happens in comment lines. A list of replacements is now placed
2666 at the head of all of the source files, except those whose only change is
2667 to replace PERL_COMMAND in the very first #! line.
2668
266950. Replaced the slow insertion sort in queue.c, for sorting the list of
2670 messages on the queue, with a bottom-up merge sort, using code contributed
2671 by Michael Haardt. This should make operations like -bp somewhat faster on
2672 large queues. It won't affect queue runners, except when queue_run_in_order
2673 is set.
2674
267551. Installed eximstats 1.31 in the distribution.
2676
267752. Added support for SRV lookups to the dnslookup router.
2678
267953. If an ACL referred to $message_body or $message_body_end, the value was not
2680 reset for any messages that followed in the same SMTP session.
2681
268254. The store-handling optimization for building very long strings was not
2683 differentiating between the different store pools. I don't think this
2684 actually made any difference in practice, but I've tidied it.
2685
268655. While running the routers to verify a sender address, $sender_address
2687 was still set to the sender address. This is wrong, because when routing to
2688 send a bounce to the sender, it would be empty. Therefore, I have changed
2689 it so that, while verifying a sender address, $sender_address is set to <>.
2690 (There is no change to what happens when verifying a recipient address.)
2691
269256. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2693 target A or AAAA records (if not already returned) without resetting the
2694 qualify_single or search_parents options of the DNS resolver. These are
2695 inappropriate in this case because the targets of MX and SRV records must
2696 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2697 target that, when qualified, matched something in the local domain. These
2698 two options are now turned off when doing these lookups.
2699
270057. It seems that at least some releases of Reiserfs (which does not have the
2701 concept of a fixed number of inodes) returns zero and not -1 for the
2702 number of available inodes. This interacted badly with check_spool_inodes,
2703 which assumed that -1 was the "no such thing" setting. What I have done is
2704 to check that the total number of inodes is greater than zero before doing
2705 the test of how many are available.
2706
270758. When a "warn" ACL statement has a log_message modifier, the message is
2708 remembered, and not repeated. This is to avoid a lot of repetition when a
2709 message has many recipients that cause the same warning to be written.
2710 Howewer, Exim was preserving the list of already written lines for an
2711 entire SMTP session, which doesn't seem right. The memory is now reset if a
2712 new message is started.
2713
271459. The "rewrite" debugging flag was not showing the result of rewriting in the
2715 debugging output unless log_rewrite was also set.
2716
271760. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2718 of (int)(handle) when we know that handle contains (void *)(-1).
2719
272061. The Exim daemon panic-logs an error return when it closes the incoming
2721 connection. However "connection reset by peer" seems to be common, and
2722 isn't really an error worthy of noting specially, so that particular error
2723 is no long logged.
2724
272562. When Exim is trying to find all the local interfaces, it used to panic and
2726 die if the ioctl to get the interface flags failed. However, it seems that
2727 on at least one OS (Solaris 9) it is possible to have an interface that is
2728 included in the list of interfaces, but for which you get a failure error
2729 for this call. This happens when the interface is not "plumbed" into a
2730 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2731 failure of the "get flags" call assumes that the interface is down.
2732
273363. Added a ${eval10: operator, which assumes all numbers are decimal. This
2734 makes life easier for people who are doing arithmetic on fields extracted
2735 from dates, where you often get leading zeros that should not be
2736 interpreted as octal.
2737
273864. Added qualify_domain to the redirect router, to override the global
2739 setting.
2740
274165. If a pathologically long header line contained very many addresses (the
2742 report of this problem mentioned 10 000) and each of them was rewritten,
2743 Exim could use up a very large amount of memory. (It kept on making new
2744 copies of the header line as it rewrote, and never released the old ones.)
2745 At the expense of a bit more processing, the header rewriting function has
2746 been changed so that it no longer eats memory in this way.
2747
274866. The generation of the Received: header has been moved from the time that a
2749 message starts to be received, to the time that it finishes. The timestamp
2750 in the Received: header should now be very close to that of the <= log
2751 line. There are two side-effects of this change:
2752
2753 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2754 logged header lines no longer include the local Received: line, because
2755 it has not yet been created. The same applies to a copy of the message
2756 that is returned to a non-SMTP sender when a message is rejected.
2757
2758 (b) When a filter file is tested using -bf, no additional Received: header
2759 is added to the test message. After some thought, I decided that this
2760 is a bug fix.
2761
2762 This change does not affect the value of $received_for. It is still set
2763 after address rewriting, but before local_scan() is called.
2764
276567. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2766
276768. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2768 gave an unhelpful panic error message, and a defer error. I have managed to
2769 change this behaviour so that it now rejects any supplied certificate,
2770 which seems right, as the list of acceptable certificates is empty.
2771
277269. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2773 gave an unhelpful defer error. I have not managed to make this reject any
2774 supplied certificates, but the error message it gives is "no certificate
2775 supplied", which is not helpful.
2776
277770. exigrep's output now also includes lines that are not associated with any
2778 message, but which match the given pattern. Implemented by a patch from
2779 Martin Sluka, which also tidied up the Perl a bit.
2780
278171. Recipient callout verification, like sender verification, was using <> in
2782 the MAIL FROM command. This isn't really the right thing, since the actual
2783 sender may affect whether the remote host accepts the recipient or not. I
2784 have changed it to use the actual sender in the callout; this means that
2785 the cache record is now keyed on a recipient/sender pair, not just the
2786 recipient address. There doesn't seem to be a real danger of callout loops,
2787 since a callout by the remote host to check the sender would use <>.
2788 [SEE ABOVE: changed after hitting problems.]
2789
279072. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2791 temporary errors. However, in the case of such a code being given after
2792 the end of a data transmission (i.e. after ".") Exim was failing to write
2793 a retry record for the message. (Yes, there was some broken host that was
2794 actually sending 8xx at this point.)
2795
279673. An unknown lookup type in a host list could cause Exim to panic-die when
2797 the list was checked. (An example that provoked this was putting <; in the
2798 middle of a list instead of at the start.) If this happened during a DATA
2799 ACL check, a -D file could be left lying around. This kind of configuration
2800 error no longer causes Exim to die; instead it causes a defer errror. The
2801 incident is still logged to the main and panic logs.
2802
280374. Buglet left over from Exim 3 conversion. The message "too many messages
2804 in one connection" was written to the rejectlog but not the mainlog, except
2805 when address rewriting (yes!) was being logged.
2806
280775. Added write_rejectlog option.
2808
280976. When a system filter was run not as root (that is, when system_filter_user
2810 was set), the values of the $n variables were not being returned to the
2811 main process; thus, they were not subsequently available in the $sn
2812 variables.
2813
281477. Added +return_path_on_delivery log selector.
2815
281678. A connection timeout was being treated differently from recipients deferred
2817 when testing hosts_max_try with a message that was older than the host's
2818 retry timeout. (The host should not be counted, thus allowing all hosts to
2819 be tried at least once before bouncing.) This may have been the cause of an
2820 occasionally reported bug whereby a message would remain on the queue
2821 longer than the retry timeout, but would be bounced if a delivery was
2822 forced. I say "may" because I never totally pinned down the problem;
2823 setting up timeout/retry tests is difficult. See also the next item.
2824
282579. The ultimate address timeout was not being applied to errors that involved
2826 a combination of host plus message (for example, a timeout on a MAIL
2827 command). When an address resolved to a number of possible hosts, and they
2828 were not all tried for each delivery (e.g. because of hosts_max_try), a
2829 message could remain on the queue longer than the retry timeout.
2830
283180. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2832 Haardt.
2833
283481. Fixed an obscure SMTP outgoing bug which required at least the following
2835 conditions: (a) there was another message waiting for the same server;
2836 (b) the server returned 5xx to all RCPT commands in the first message so
2837 that the message was not completed; (c) the server dropped the connection
2838 or gave a negative response to the RSET that Exim sends to abort the
2839 transaction. The observed case was a dropped connection after DATA that had
2840 been sent in pipelining mode. That is, the server had advertised PIPELINING
2841 but was not implementing it correctly. The effect of the bug was incorrect
2842 behaviour, such as trying another host, and this could lead to a crash.
2843
2844
2845Exim version 4.30
2846-----------------
2847
2848 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2849 and daemon.c were passed as pointers to ints; they should have been
2850 pointers to socklen_t variables (which are typically unsigned ints).
2851
2852 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2853 fixed.
2854
2855 3. Fixed a really odd bug that affected only the testing scheme; patching a
2856 certain fixed string in the binary changed the value of another string that
2857 happened to be identical to the end of the original first string.
2858
2859 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2860 name", it returns that address as the IP address. On some operating
2861 systems (e.g. Solaris), it also passes back the IP address string as the
2862 "host name". However, on others (e.g. Linux), it passes back an empty
2863 string. Exim wasn't checking for this, and was changing the host name to an
2864 empty string, assuming it had been canonicized.
2865
2866 5. Although rare, it is permitted to have more than one PTR record for a given
2867 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2868 all the names associated with an address, because they do in Solaris.
2869 However, it seems that they do not in Linux for data that comes from the
2870 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2871 I found this out when I moved to a new Linux workstation and tried to run
2872 the Exim test suite.
2873
2874 To get round this problem I have changed the code so that it now does its
2875 own call to the DNS to look up PTR records when searching for a host name.
2876 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2877 addresses that are only in /etc/hosts are still found.
2878
2879 This behaviour is, however, controlled by an option called host_lookup_
2880 order, which defaults to "bydns:byaddr". If people want to use the other
2881 order, or indeed, just use one or the other means of lookup, they can
2882 specify it in this variable.
2883
2884 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2885 some operating systems, this comes back from gethostbyaddr() as an empty
2886 string, and this is what Exim used to test for. However, it seems that in
2887 other systems, "." is yielded. Exim now tests for this case too.
2888
2889 7. The values of check_spool_space and check_log_space are now held internally
2890 as a number of kilobytes instead of an absolute number of bytes. If a
2891 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2892 kilobyte. This means that much larger values can be stored.
2893
2894 8. Exim monitor: an attempt to get the action menu when not actually pointing
2895 at a message produces an empty menu entitled "No message selected". This
2896 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2897 no entries in it ("Shell widget menu has zero width and/or height"). So I
2898 have added a single, blank menu entry in this case.
2899
2900 9. Added ${quote_local_part.
2901
290210. MIME decoding is now applied to the contents of Subject: header lines when
2903 they are logged.
2904
290511. Now that a reference to $sender_host_address automatically causes a reverse
2906 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2907 host lookup before query-style lookups in lists that might use this
2908 variable. This has therefore been abolished, and the "net-" prefix is no
2909 longer necessary for query-style lookups.
2910
291112. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2912 have been a typo for LFLAGS, so it has been changed.
2913
291413. The install script calls Exim with "-C /dev/null" in order to find the
2915 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2916 to be output. Howeve, since Exim outputs its version number before the
2917 error, it didn't break the script. It just looked ugly. I fixed this by
2918 always allowing "-C /dev/null" if the caller is root.
2919
292014. Ignore overlarge ACL variable number when reading spool file - insurance
2921 against a later release with more variables having written the file.
2922
292315. The standard form for an IPv6 address literal was being rejected by EHLO.
2924 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2925 this, as well as the form without the "IPv6" on the front.
2926
292716. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2928 OS/Makefile-Darwin file.
2929
293017. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2931 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2932
293318. After change 4.21/52, "%ld" was used to format the contents of the $inode
2934 variable. However, some OS use ints for inodes. I've added cast to long int
2935 to get rid of the compiler warning.
2936
293719. I had forgotten to lock out "/../" in configuration file names when
2938 ALT_CONFIG_PREFIX was set.
2939
294020. Routers used for verification do not need to specify transports. However,
2941 if such a router generated a host list, and callout was configured, Exim
2942 crashed, because it could not find a port number from the (non-existent)
2943 transport. It now assumes port 25 in this circumstance.
2944
294521. Added the -t option to exigrep.
2946
294722. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2948 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2949 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2950 them is set, LOOKUP_LSEARCH is forced.
2951
295223. "exim -bV" now outputs a list of lookups that are included in the binary.
2953
295424. Added sender and host information to the "rejected by local_scan()" log
2955 line; previously there was no indication of these.
2956
295725. Added .include_if_exists.
2958
295926. Change 3.952/11 added an explicit directory sync on top of a file sync for
2960 Linux. It turns out that not all file systems support this. Apparently some
2961 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2962 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2963 not supported on the file descriptor, is now ignored when Exim is trying to
2964 sync a directory. This applies only to Linux.
2965
296627. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2967
296828. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2969 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2970 this.
2971
297229. Added support for maildirsize files from supplied patch (modified a bit).
2973
297430. The use of :fail: followed by an empty string could lead Exim to respond to
2975 sender verification failures with (e.g.):
2976
2977 550 Verification failed for <xxx>
2978 550 Sender verify failed
2979
2980 where the first response line was missing the '-' that indicates it is not
2981 the final line of the response.
2982
298331. The loop for finding the name of the user that called Exim had a hardwired
2984 limit of 10; it now uses the value of finduser_retries, which is used for
2985 all other user lookups.
2986
298732. Added $received_count variable, available in data and not_smtp ACLs, and at
2988 delivery time.
2989
299033. Exim was neglecting to zero errno before one call of strtol() when
2991 expanding a string and expecting an integer value. On some systems this
2992 resulted in spurious "integer overflow" errors. Also, it was casting the
2993 result into an int without checking.
2994
299534. Testing for a connection timeout using "timeout_connect" in the retry rules
2996 did not work. The code looks as if it has *never* worked, though it appears
2997 to have been documented since at least releast 1.62. I have made it work.
2998
299935. The "timeout_DNS" error in retry rules, also documented since at least
3000 1.62, also never worked. As it isn't clear exactly what this means, and
3001 clearly it isn't a major issue, I have abolished the feature by treating it
3002 as "timeout", and writing a warning to the main and panic logs.
3003
300436. The display of retry rules for -brt wasn't always showing the error code
3005 correctly.
3006
300737. Added new error conditions to retry rules: timeout_A, timeout_MX,
3008 timeout_connect_A, timeout_connect_MX.
3009
301038. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3011 to the empty sender.
3012
301339. The daemon was not analysing the content of -oX till after it had closed
3014 stderr and disconnected from the controlling terminal. This meant that any
3015 syntax errors were only noted on the panic log, and the return code from
3016 the command was 0. By re-arranging the code a little, I've made the
3017 decoding happen first, so such errors now appear on stderr, and the return
3018 code is 1. However, the actual setting up of the sockets still happens in
3019 the disconnected process, so errors there are still only recorded on the
3020 panic log.
3021
302240. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3023 connections (as happens on some IP stacks) was logged at start up time as
3024 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3025 it from "IPv6 and IPv4", which means that two separate sockets are being
3026 used.
3027
302841. The debug output for gethostbyname2() or getipnodebyname() failures now
3029 says whether AF_INET or AF_INET6 was passed as an argument.
3030
303142. Exiwhat output was messed up when time zones were included in log
3032 timestamps.
3033
303443. Exiwhat now gives more information about the daemon's listening ports,
3035 and whether -tls-on-connect was used.
3036
303744. The "port" option of the smtp transport is now expanded.
3038
303945. A "message" modifier in a "warn" statement in a non-message ACL was being
3040 silently ignored. Now an error message is written to the main and panic
3041 logs.
3042
304346. There's a new ACL modifier called "logwrite" which writes to a log file
3044 as soon as it is encountered.
3045
304647. Added $local_user_uid and $local_user_gid at routing time.
3047
304848. Exim crashed when trying to verify a sender address that was being
3049 rewritten to "<>".
3050
305149. Exim was recognizing only a space character after ".include". It now also
3052 recognizes a tab character.
3053
305450. Fixed several bugs in the Perl script that creates the exim.8 man page by
3055 extracting the relevant information from the specification. The man page no
3056 longer contains scrambled data for the -d option, and I've added a section
3057 at the front about calling Exim under different names.
3058
305951. Added "extra_headers" argument to the "mail" command in filter files.
3060
306152. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3062 crash.
3063
306453. Installed eximstats 1.29.
3065
306654. Added transport_filter_timeout as a generic transport option.
3067
306855. Exim no longer adds an empty Bcc: header to messages that have no To: or
3069 Cc: header lines. This was required by RFC 822, but it not required by RFC
3070 2822.
3071
307256. Exim used to add From:, Date:, and Message-Id: header lines to any
3073 incoming messages that did not have them. Now it does so only if the
3074 message originates locally, that is, if there is no associated remote host
3075 address. When Resent- header lines are present, this applies to the Resent-
3076 lines rather than the non-Resent- lines.
3077
307857. Drop incoming SMTP connection after too many syntax or protocol errors. The
3079 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3080
308158. Messages for configuration errors now include the name of the main
3082 configuration file - useful now that there may be more than one file in a
3083 list (.included file names were always shown).
3084
308559. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3086 for those rare installations that do not start the daemon as root or run it
3087 setuid root. I've cut out the call to initgroups() if the daemon is not
3088 root at that time.
3089
309060. The Exim user and group can now be bound into the binary as text strings
3091 that are looked up at the start of Exim's processing.
3092
309361. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3094
309562. Added $mailstore_basename variable.
3096
309763. Installed patch to sieve.c from Michael Haardt.
3098
309964. When Exim failed to open the panic log after failing to open the main log,
3100 the original message it was trying to log was written to stderr and debug
3101 output, but if they were not available (the usual case in production), it
3102 was lost. Now it is written to syslog before the two lines that record the
3103 failures to open the logs.
3104
310565. Users' Exim filters run in subprocesses under the user's uid. It is
3106 possible for a "deliver" command or an alias in a "personal" command to
3107 provoke an address rewrite. If logging of address rewriting is configured,
3108 this fails because the process is not running as root or exim. There may be
3109 a better way of dealing with this, but for the moment (because 4.30 needs
3110 to be released), I have disabled address rewrite logging when running a
3111 filter in a non-root, non-exim process.
3112
3113
3114Exim version 4.24
3115-----------------
3116
3117 1. The buildconfig auxiliary program wasn't quoting the value set for
3118 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3119 not defined. This bug was masked in 4.22 by the effect that was fixed in
3120 change 4.23/1.
3121
3122 2. Some messages that were rejected after a message id was allocated were
3123 shown as "incomplete" by exigrep. It no longer does this for messages that
3124 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3125
3126 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3127 have allow_domain_literals set, the ID did not get logged in the <= line.
3128 Domain literals are now always recognized in Message-ID: header lines.
3129
3130 4. The first argument for a ${extract expansion item is the key name or field
3131 number. Leading and trailing spaces in this item were not being ignored,
3132 causing some misleading effects.
3133
3134 5. When deliver_drop_privilege was set, single queue runner processes started
3135 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3136 same command in the process it spins off) were not dropping privilege.
3137
3138 6. When the daemon running as "exim" started a queue runner, it always
3139 re-executed Exim in the spun-off process. This is a waste of effort when
3140 deliver_drop_privilege is set. The new process now just calls the
3141 queue-runner function directly.
3142
3143
3144Exim version 4.23
3145-----------------
3146
3147 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3148 HEADERS_CHARSET.
3149
3150 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3151 ignored. Though the use of -oP was forcing the writing of a pid file, it
3152 was always written to the default place.
3153
3154 3. If the message "no IP address found for host xxxx" is generated during
3155 incoming verification, it is now followed by identification of the incoming
3156 connection (so you can more easily find what provoked it).
3157
3158 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3159
3160 5. Added some features to "harden" Exim a bit more against certain attacks:
3161
3162 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3163 be put in Local/Makefile. This is like the never_users runtime option,
3164 but it cannot be overridden. The default setting is "root".
3165
3166 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3167 prefix string with which any file named in a -C command line option
3168 must start.
3169
3170 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3171 is retained for -C and -D only if the caller of Exim is root. Without
3172 it, the exim user may also use -C and -D and retain privilege.
3173
3174 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3175 command line option is disabled.
3176
3177 6. Macro names set by the -D option must start with an upper case letter, just
3178 like macro names defined in the configuration file.
3179
3180 7. Added "dereference=" facility to LDAP.
3181
3182 8. Two instances of the typo "uknown" in the source files are fixed.
3183
3184 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3185 the Configure-Makefile script screwed up while processing it.
3186
318710. Incorporated PCRE 4.4.
3188
318911. The SMTP synchronization check was not operating right at the start of an
3190 SMTP session. For example, it could not catch a HELO sent before the client
3191 waited for the greeting. There is now a check for outstanding input at the
3192 point when the greeting is written. Because of the duplex, asynchronous
3193 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3194 way, but not yet received, when the check is performed.
3195
319612. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3197 on TCP/IP sockets, because this apparently causes some broken clients to
3198 timeout.
3199
320013. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3201 unchanged) from the Cygwin maintainer.
3202
320314. The code for -bV that shows what is in the binary showed "mbx" when maildir
3204 was supported instead of testing for mbx. Effectively a typo.
3205
320615. The spa authenticator server code was not checking that the input it
3207 received was valid base64.
3208
320916. The debug output line for the "set" modifier in ACLs was not showing the
3210 name of the variable that was being set.
3211
321217. Code tidy: the variable type "vtype_string" was never used. Removed it.
3213
321418. Previously, a reference to $sender_host_name did not cause a DNS reverse
3215 lookup on its own. Something else was needed to trigger the lookup. For
3216 example, a match in host_lookup or the need for a host name in a host list.
3217 Now, if $sender_host_name is referenced and the host name has not yet been
3218 looked up, a lookup is performed. If the lookup fails, the variable remains
3219 empty, and $host_lookup_failed is set to "1".
3220
322119. Added "eqi" as a case-independent comparison operator.
3222
322320. The saslauthd authentication condition could segfault if neither service
3224 nor realm was specified.
3225
322621. If an overflowing value such as "2048M" was set for message_size_limit, the
3227 error message that was logged was misleading, and incoming SMTP
3228 connections were dropped. The message is now more accurate, and temporary
3229 errors are given to SMTP connections.
3230
323122. In some error situations (such as 21 above) Exim rejects all SMTP commands
3232 (except RSET) with a 421 error, until QUIT is received. However, it was
3233 failing to send a response to QUIT.
3234
323523. The HELO ACL was being run before the code for helo_try_verify_hosts,
3236 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3237 ACL is now run after the helo_try_verify_hosts code.
3238
323924. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3240 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3241 case-independent, so other case variants are also recognized). Apparently
3242 some systems use these upper case variants.
3243
324425. If more than two messages were waiting for the same host, and a transport
3245 filter was specified for the transport, Exim sent two messages over the
3246 same TCP/IP connection, and then failed with "socket operation on non-
3247 socket" when it tried to send the third.
3248
324926. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3250
325127. The extern definition of crypt16() in expand.c was not being excluded when
3252 the OS had its own crypt16() function.
3253
325428. Added bounce_return_body as a new option, and bounce_return_size_limit
3255 as a preferred synonym for return_size_limit, both as an option and as an
3256 expansion variable.
3257
325829. Added LIBS=-liconv to OS/Makefile-OSF1.
3259
326030. Changed the default configuration ACL to relax the local part checking rule
3261 for addresses that are not in any local domains. For these addresses,
3262 slashes and pipe symbols are allowed within local parts, but the sequence
3263 /../ is explicitly forbidden.
3264
326531. SPA server authentication was not clearing the challenge buffer before
3266 using it.
3267
326832. log_message in a "warn" ACL statement was writing to the reject log as
3269 well as to the main log, which contradicts the documentation and doesn't
3270 seem right (because no rejection is happening). So I have stopped it.
3271
327233. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3273 However, I am unable to do any testing of this.
3274
327534. Fixed an infelicity in the appendfile transport. When checking directories
3276 for a mailbox, to see if any needed to be created, it was accidentally
3277 using path names with one or more superfluous leading slashes; tracing
3278 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3279
328035. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3281 contents are added to the log line that is written for every discarded
3282 recipient. (Previously a log_message setting was ignored.)
3283
328436. The ${quote: operator now quotes the string if it is empty.
3285
328637. The install script runs exim in order to find its version number. If for
3287 some reason other than non-existence or emptiness, which it checks, it
3288 could not run './exim', it was installing it with an empty version number,
3289 i.e. as "exim-". This error state is now caught, and the installation is
3290 aborted.
3291
329238. An argument was missing from the function that creates an error message
3293 when Exim fails to connect to the socket for saslauthd authentication.
3294 This could cause Exim to crash, or give a corrupted message.
3295
329639. Added isip, isip4, and isip6 to ${if conditions.
3297
329840. The ACL variables $acl_xx are now saved with the message, and can be
3299 accessed later in routers, transports, and filters.
3300
330141. The new lookup type nwildlsearch is like wildlsearch, except that the key
3302 strings in the file are not string-expanded.
3303
330442. If a MAIL command specified a SIZE value that was too large to fit into an
3305 int variable, the check against message_size_limit failed. Such values are
3306 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3307 day this will have to be increased, but I don't think I want to be around
3308 when emails are that large.
3309
3310
3311
3312Exim version 4.22
3313-----------------
3314
3315 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3316 iconv() is not standard in FreeBSD.
3317
3318 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3319 IPv6 enabled. The observed symptom was a segmentation fault on return from
3320 the function os_common_find_running_interfaces() in src/os.c.
3321
3322 3. In the check_special_case() function in daemon.c I had used "errno" as an
3323 argument name, which causes warnings on some systems. This was basically a
3324 typo, since it was named "eno" in the comments!
3325
3326 4. The code that waits for the clock to tick (at a resolution of some fraction
3327 of a second) so as to ensure message-id uniqueness was always waiting for
3328 at least one whole tick, when it could have waited for less. [This is
3329 almost certainly not relevant at current processor speeds, where it is
3330 unlikely to ever wait at all. But we try to future-proof.]
3331
3332 5. The function that sleeps for a time interval that includes fractions of a
3333 second contained a race. It did not block SIGALRM between setting the
3334 timer, and suspending (a couple of lines later). If the interval was short
3335 and the sigsuspend() was delayed until after it had expired, the suspension
3336 never ended. On busy systems this could lead to processes getting stuck for
3337 ever.
3338
3339 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3340 process, before it forks any delivery processes. The open lookup caching
3341 mechanism meant that the open file or database connection was passed into
3342 the delivery process. The problem was that delivery processes always tidy
3343 up cached lookup data. This could cause a problem for the next delivery
3344 process started by the queue runner, because the external queue runner
3345 process does not know about the closure. So the next delivery process
3346 still has data in the lookup cache. In the case of a file lookup, there was
3347 no problem because closing a file descriptor in a subprocess doesn't affect
3348 the parent. However, if the lookup was caching a connection to a database,
3349 the connection was closed, and the second delivery process was likely to
3350 see errors such as "PGSQL: query failed: server closed the connection
3351 unexpectedly". The problem has been fixed by closing all cached lookups
3352 in a queue runner before running a delivery process.
3353
3354 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3355 seem to have the "const" qualifier which it has on other OS. I've
3356 parameterised it.
3357
3358 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3359 *of the same type* (client or server) with the same public name that an
3360 error should be diagnosed.
3361
3362 9. When Exim looked up a host name for an IP address, but failed to find the
3363 original IP address when looking up the host name (a safety check), it
3364 output the message "<ip address> does not match any IP for NULL", which was
3365 confusing, to say the least. The bug was that the host name should have
3366 appeared instead of "NULL".
3367
336810. Since release 3.03, if Exim is called by a uid other than root or the Exim
3369 user that is built into the binary, and the -C or -D options is used, root
3370 privilege is dropped before the configuration file is read. In addition,
3371 logging is switched to stderr instead of the normal log files. If the
3372 configuration then re-defines the Exim user, the unprivileged environment
3373 is probably not what is expected, so Exim logs a panic warning message (but
3374 proceeds).
3375
3376 However, if deliver_drop_privilege is set, the unprivileged state may well
3377 be exactly what is intended, so the warning has been cut out in that case,
3378 and Exim is allowed to try to write to its normal log files.
3379
3380
3381Exim version 4.21
3382-----------------
3383
3384 1. smtp_return_error_details was not giving details for temporary sender
3385 or receiver verification errors.
3386
3387 2. Diagnose a configuration error if two authenticators have the same public
3388 name.
3389
3390 3. Exim used not to create the message log file for a message until the first
3391 delivery attempt. This could be confusing when incoming messages were held
3392 for policy or load reasons. The message log file is now created at the time
3393 the message is received, and an initial "Received" line is written to it.
3394
3395 4. The automatically generated man page for command line options had a minor
3396 bug that caused no ill effects; however, a more serious problem was that
3397 the procedure for building the man page automatically didn't always
3398 operate. Consequently, release 4.20 contains an out-of-date version. This
3399 shouldn't happen again.
3400
3401 5. When building Exim with embedded Perl support, the script that builds the
3402 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3403 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3404
3405 6. The freeze_tell option was not being used for messages that were frozen on
3406 arrival, either by an ACL or by local_scan().
3407
3408 7. Added the smtp_incomplete_transaction log selector.
3409
3410 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3411 was accepting AUTH without a new EHLO.
3412
3413 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3414 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3415 RFC.
3416
341710. Logging of TCP/IP connections (when configured) now happens in the main
3418 daemon process instead of the child process, so that the TCP/IP connection
3419 count is more accurate (but it can never be perfect).
3420
342111. The use of "drop" in a nested ACL was not being handled correctly in the
3422 outer ACL. Now, if condition failure induced by the nested "drop" causes
3423 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3424 or "require"), the connection is dropped.
3425
342612. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3427 that yield "discard" can now be used with an "accept" or a "discard" verb,
3428 but an error is generated for any others (because I can't see a useful way
3429 to define what should happen).
3430
343113. When an ACL is read dynamically from a file (or anywhere else), the lines
3432 are now processed in the same way as lines in the Exim configuration file.
3433 In particular, continuation lines are supported.
3434
343514. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3436
343715. Added -ti meaning -t -i.
3438
343916. Check for letters, digits, hyphens, and dots in the names of dnslist
3440 domains, and warn by logging if others are found.
3441
344217. At least on BSD, alignment is not guarenteed for the array of ifreq's
3443 returned from GIFCONF when Exim is trying to find the list of interfaces on
3444 a host. The code in os.c has been modified to copy each ifreq to an aligned
3445 structure in all cases.
3446
3447 Also, in some cases, the returned ifreq's were being copied to a 'struct
3448 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3449 means the last couple of bytes of an IPv6 address could be chopped if the
3450 ifreq contained only a normal sockaddr (14 bytes storage).
3451
345218. Named domain lists were not supported in the hosts_treat_as_local option.
3453 An entry such as +xxxx was not recognized, and was treated as a literal
3454 domain name.
3455
345619. Ensure that header lines added by a DATA ACL are included in the reject log
3457 if the ACL subsequently rejects the message.
3458
345920. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3460 MD5 (which is deprecated).
3461
346221. When testing a filter file using -bf, Exim was writing a message when it
3463 took the sender from a "From " line in the message, but it was not doing so
3464 when it took $return_path from a Return-Path: header line. It now does.
3465
346622. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3467 with a valid header line field name (a series of printing characters
3468 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3469
347023. Changed "disc" in the source to "disk" to conform to the documentation and
3471 the book and for uniformity.
3472
347324. Ignore Sendmail's -Ooption=value command line item.
3474
347525. When execve() failed while trying to run a command in a pipe transport,
3476 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3477 could be confused with a return value of 69 from the command itself. This
3478 has been changed to 127, the value the shell returns if it is asked to run
3479 a non-existent command. The wording for the related log line suggests a
3480 non-existent command as the problem.
3481
348226. If received_header_text expands to an empty string, do not add a Received:
3483 header line to the message. (Well, it adds a token one on the spool, but
3484 marks it "old" so that it doesn't get used or transmitted.)
3485
348627. Installed eximstats 1.28 (addition of -nt option).
3487
348828. There was no check for failure on the call to getsockname() in the daemon
3489 code. This can fail if there is a shortage of resources on the system, with
3490 ENOMEM, for example. A temporary error is now given on failure.
3491
349229. Contrary to the C standard, it seems that in some environments, the
3493 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3494 program. Exim now does this explicitly; it affects the formatting of
3495 timestamps using strftime().
3496
349730. If exiqsumm was given junk data, it threw up some uninitialized variable
3498 complaints. I've now initialized all the variables, to avoid this.
3499
350032. Header lines added by a system filter were not being "seen" during
3501 transport-time rewrites.
3502
350333. The info_callback() function passed to OpenSSL is set up with type void
3504 (*)(SSL *, int, int), as described somewhere. However, when calling the
3505 function (actually a macro) that sets it up, the type void(*)() is
3506 expected. I've put in a cast to prevent warnings from picky compilers.
3507
350834. If a DNS black list lookup found a CNAME record, but there were no A
3509 records associated with the domain it pointed at, Exim crashed.
3510
351135. If a DNS black list lookup returned more than one A record, Exim ignored
3512 all but the first. It now scans all returned addresses if a particular IP
3513 value is being sought. In this situation, the contents of the
3514 $dnslist_value variable are a list of all the addresses, separated by a
3515 comma and a space.
3516
351736. Tightened up the rules for host name lookups using reverse DNS. Exim used
3518 to accept a host name and all its aliases if the forward lookup for any of
3519 them yielded the IP address of the incoming connection. Now it accepts only
3520 those names whose forward lookup yields the correct IP address. Any other
3521 names are discarded. This closes a loophole whereby a rogue DNS
3522 administrator could create reverse DNS records to break through a
3523 wildcarded host restriction in an ACL.
3524
352537. If a user filter or a system filter that ran in a subprocess used any of
3526 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3527 the wrong values were passed to the pipe command ($thisaddress had the
3528 value of $0, $0 had the value of $1, etc). This bug was introduced by
3529 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3530
353138. Improved the line breaking for long SMTP error messages from ACLs.
3532 Previously, if there was no break point between 40 and 75 characters, Exim
3533 left the rest of the message alone. Two changes have been made: (a) I've
3534 reduced the minimum length to 35 characters; (b) if it can't find a break
3535 point between 35 and 75 characters, it looks ahead and uses the first one
3536 that it finds. This may give the occasional overlong line, but at least the
3537 remaining text gets split now.
3538
353939. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3540 file descriptors might be low, and that setting 1000 would always raise it.
3541 It turns out that in some environments, the limit is already over 1000 and
3542 that lowering it causes trouble. So now Exim takes care not to decrease it.
3543
354440. When delivering a message, the value of $return_path is set to $sender_
3545 address at the start of routing (routers may change the value). By an
3546 oversight, this default was not being set up when an address was tested by
3547 -bt or -bv, which affected the outcome if any router or filter referred to
3548 $return_path.
3549
355041. The idea of the "warn" ACL verb is that it adds a header or writes to the
3551 log only when "message" or "log_message" are set. However, if one of the
3552 conditions was an address verification, or a call to a nested ACL, the
3553 messages generated by the underlying test were being passed through. This
3554 no longer happens. The underlying message is available in $acl_verify_
3555 message for both "message" and "log_message" expansions, so it can be
3556 passed through if needed.
3557
355842. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3559 new expansion $bh_ to give the encoded byte string without charset
3560 translation. Translation happens only if iconv() is available; HAVE_ICONV
3561 indicates this at build time. HEADERS_CHARSET gives the charset to
3562 translate to; headers_charset can change it in the configuration, and
3563 "headers charset" can change it in an individual filter file.
3564
356543. Now that we have a default RFC 2047 charset (see above), the code in Exim
3566 that creates RFC 2047 encoded "words" labels them as that charset instead
3567 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3568 expansion operator; (ii) when Exim creates a From: line for a local
3569 message; (iii) when a header line is rewritten to include a "phrase" part.
3570
357144. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3572 buggy, causing it to skip the first lines of messages whose message ID
3573 ended in 'D'. This would not have bitten before Exim release 4.14, because
3574 message IDs were unlikely to end in 'D' before then. The effect was to have
3575 incorrect size information for certain domains.
3576
357745. #include "config.h" was missing at the start of the crypt16.c module. This
3578 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3579 noticed.
3580
358146. If there was a timeout during a "random" callout check, Exim treated it as
3582 a failure of the random address, and carried on sending RSET and the real
3583 address. If the delay was just some slowness somewhere, the response to the
3584 original RCPT would be taken as a response to RSET and so on, causing
3585 mayhem of various kinds.
3586
358747. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3588 when I implemented it. It didn't allow for the fact that some option values
3589 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3590 the right test for positive values.
3591
359248. Domain names in DNS records are case-independent. Exim always looks them up
3593 in lower case. Some resolvers return domain names in exactly the case they
3594 appear in the zone file, that is, they may contain uppercase letters. Not
3595 all resolvers do this - some return always lower case. Exim was treating a
3596 change of case by a resolver as a change of domain, similar to a widening
3597 of a domain abbreviation. This triggered its re-routing code and so it was
3598 trying to route what was effectively the same domain again. This normally
3599 caused routing to fail (because the router wouldn't handle the domain
3600 twice). Now Exim checks for this case specially, and just changes the
3601 casing of the domain that it ultimately uses when it transmits the message
3602 envelope.
3603
360449. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3605 module.
3606
360750. If a filter generated a file delivery with a non-absolute name (possible if
3608 no home directory exists for the router), the forbid_file option was not
3609 forbidding it.
3610
361151. Added '&' feature to dnslists, to provide bit mask matching in addition to
3612 the existing equality matching.
3613
361452. Exim was using ints instead of ino_t variables in some places where it was
3615 dealing with inode numbers.
3616
361753. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3618 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3619 called TMPDIR, and if it finds it is different, it changes its value.
3620
362154. The smtp_printf() function is now made available to local_scan() so
3622 additional output lines can be written before returning. There is also an
3623 smtp_fflush() function to enable the detection of a dropped connection.
3624 The variables smtp_input and smtp_batched_input are exported to
3625 local_scan().
3626
362755. Changed the default runtime configuration: the message "Unknown user"
3628 has been removed from the ACL, and instead placed on the localuser router,
3629 using the cannot_route_message feature. This means that any verification
3630 failures that generate their own messages won't get overridden. Similarly,
3631 the "Unrouteable address" message that was in the ACL for unverifiable
3632 relay addresses has also been removed.
3633
363456. Added hosts_avoid_esmtp to the smtp transport.
3635
363657. The exicyclog script was not checking for the esoteric option
3637 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3638 will work only if exicyclog is run under the appropriate euid.
3639
364058. Following a discussion on the list, the rules by which Exim recognises line
3641 endings on incoming messages have been changed. The -dropcr and drop_cr
3642 options are now no-ops, retained only for backwards compatibility. The
3643 following line terminators are recognized: LF CRLF CR. However, special
3644 processing applies to CR:
3645
3646 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3647 nor a local message in the state where . is a terminator.
3648
3649 (ii) If a bare CR is encountered in a header line, an extra space is added
3650 after the line terminator so as not to end the header. The reasoning
3651 behind this is that bare CRs in header lines are most likely either
3652 to be mistakes, or people trying to play silly games.
3653
365459. The size of a message, as listed by "-bp" or in the Exim monitor window,
3655 was being incorrectly given as 18 bytes larger than it should have been.
3656 This is a VOB (very old bug).
3657
365860. This may never have affected anything current, but just in case it has:
3659 When the local host is found other than at the start of a list of hosts,
3660 the local host, those with the same MX, and any that follow, are discarded.
3661 When the list in question was part of a longer list of hosts, the following
3662 hosts (not currently being processed) were also being discarded. This no
3663 longer happens. I'm not sure if this situation could ever has previously
3664 arisen.
3665
366661. Added the "/MX" feature to lists of hosts in the manualroute and query
3667 program routers.
3668
366962. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3670 header. This is something that is recommended in a new Internet Draft, and
3671 is something that is documented as being done by Sendmail. There are two
3672 possible values. For messages generated by the autoreply transport, Exim
3673 adds:
3674
3675 Auto-Submitted: auto-replied
3676
3677 whereas for all other generated messages (e.g. bounces) it adds
3678