Tidies to SMTP dialogue debugging output.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
898d150f 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.325 2006/03/08 10:49:18 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
214e2000
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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
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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
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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
8def5aaf
PH
208PH/40 Changed the default ident timeout from 30s to 5s.
209
929ba01c
PH
210PH/41 Added support for the use of login_cap features, on those BSD systems
211 that have them, for controlling the resources used by pipe deliveries.
212
2632889e
PH
213PH/42 The content-scanning code uses fopen() to create files in which to put
214 message data. Previously it was not paying any attention to the mode of
215 the files. Exim runs with umask(0) because the rest of the code creates
216 files with open(), and sets the required mode explicitly. Thus, these
217 files were ending up world-writeable. This was not a big issue, because,
218 being within the spool directory, they were not world-accessible. I have
219 created a function called modefopen, which takes an additional mode
220 argument. It sets umask(777), creates the file, chmods it to the required
221 mode, then resets the umask. All the relevant calls to fopen() in the
222 content scanning code have been changed to use this function.
223
944a9c55
PH
224PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
225 to 24 hours. This avoids potential overflow problems when processing G
226 and H retry rules. I suspect nobody ever tinkers with this value.
227
4a23603b
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228PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
229
4730f942
PH
230PH/45 When the plaintext authenticator is running as a client, the server's
231 challenges are checked to ensure they are valid base64 strings. By
232 default, the authentication attempt is cancelled if an invalid string is
233 received. Setting client_ignore_invalid_base64 true ignores these errors.
234 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
235 they are received. Thus, the responses can be made to depend on the
236 challenges. If an invalid string is ignored, an empty string is placed in
237 the variable.
238
30dba1e6
PH
239PH/46 Messages that are created by the autoreply transport now contains a
240 References: header, in accordance with RFCs 2822 and 3834.
241
382afc6b
PH
242PH/47 Added authenticated_sender_force to the smtp transport.
243
a86229cf
PH
244PH/48 The ${prvs expansion was broken on systems where time_t was long long.
245
50c99ba6
PH
246PH/49 Installed latest patch from the Sieve maintainer.
247
d35e429d
PH
248PH/50 When an Exim quota was set without a file count quota, and mailbox_size
249 was also set, the appendfile transport was unnecessarily scanning a
250 directory of message files (e.g. for maildir delivery) to find the count
251 of files (along with the size), even though it did not need this
252 information. It now does the scan only if it needs to find either the
253 size of the count of files.
254
f90d018c
PH
255PH/51 Added ${time_eval: to convert Exim time strings into seconds.
256
75def545
PH
257PH/52 Two bugs concerned with error handling when the smtp transport is
258 used in LMTP mode:
259
260 (i) Exim was not creating retry information for temporary errors given
261 for individual recipients after the DATA command when the smtp transport
262 was used in LMTP mode. This meant that they could be retried too
263 frequently, and not timed out correctly.
264
265 (ii) Exim was setting the flag that allows error details to be returned
266 for LMTP errors on RCPT commands, but not for LMTP errors for individual
267 recipients that were returned after the DATA command.
268
269PH/53 This is related to PH/52, but is more general: for any failing address,
270 when detailed error information was permitted to be returned to the
271 sender, but the error was temporary, then after the final timeout, only
272 "retry timeout exceeded" was returned. Now it returns the full error as
273 well as "retry timeout exceeded".
274
c46782ef
PH
275PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
276 do this, and (what is worse) MTAs that accept it.
277
71fafd95
PH
278PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
279 will now be deprecated.
280
2c5db4fd
PH
281PH/56 New os.c-cygwin from the Cygwin maintainer.
282
9cf6b11a
JJ
283JJ/06 exipick: added --unsorted option to allow unsorted output in all output
284 formats (previously only available in exim formats via -bpr, -bpru,
285 and -bpra. Now also available in native and exiqgrep formats)
286
287JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
288 with very large, slow to parse queues
289
290JJ/08 exipick: added ! as generic prefix to negate any criteria format
291
292JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
293
898d150f
PH
294PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
295 responses to authentication challenges, though it was showing the
296 challenges; (ii) I've removed the CR characters from the debug output for
297 SMTP output lines.
298
214e2000 299
5de37277
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300Exim version 4.60
301-----------------
302
cc38ddbf
PH
303PH/01 Two changes to the default runtime configuration:
304
305 (1) Move the checks for relay_from_hosts and authenticated clients from
306 after to before the (commented out) DNS black list checks.
307
308 (2) Add control=submission to the relay_from_hosts and authenticated
309 clients checks, on the grounds that messages accepted by these
310 statements are most likely to be submissions.
5de37277 311
72fdd6ae
PH
312PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
313
314 (1) Generate an error if the third argument for the ${prvs expansion is
315 not a single digit.
316
317 (2) Treat a missing third argument of ${prvscheck as if it were an empty
318 string.
319
320 (3) Reset the variables that are obtained from the first argument of
321 ${prvscheck and used in the second argument before leaving the code,
322 because their memory is reclaimed, so using them afterwards may do
323 silly things.
324
325 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
326 one (it's much easier than Tom thought :-).
327
328 (5) Because of (4), we can now allow for the use of $prvscheck_result
329 inside the third argument.
cb9328de 330
cb741023
PH
331PH/03 For some reason, the default setting of PATH when running a command from
332 a pipe transport was just "/usr/bin". I have changed it to
333 "/bin:/usr/bin".
334
f174f16e
PH
335PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
336 anything to be listed in the output from -bV.
b2f5a032 337
c25242d7
PH
338PH/05 When a filter generated an autoreply, the entire To: header line was
339 quoted in the delivery log line, like this:
340
341 => >A.N.Other <ano@some.domain> <original@ddress> ...
342
343 This has been changed so that it extracts the operative address. There
344 may be more than one such address. If so, they are comma-separated, like
345 this:
346
347 => >ano@some.domain,ona@other.domain <original@ddress> ...
348
82c19f95
PH
349PH/06 When a client host used a correct literal IP address in a HELO or EHLO
350 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
351 not being looked up in the rDNS to get a host name, Exim was showing the
352 IP address twice in Received: lines, even though the IP addresses were
353 identical. For example:
354
355 Received: from [1.2.3.4] (helo=[1.2.3.4])
356
357 However, if the real host name was known, it was omitting the HELO data
358 if it matched the actual IP address. This has been tidied up so that it
359 doesn't show the same IP address twice.
360
d7ffbc12
PH
361PH/07 When both +timestamp and +memory debugging was on, the value given by
362 $tod_xxx expansions could be wrong, because the tod_stamp() function was
363 called by the debug printing, thereby overwriting the timestamp buffer.
364 Debugging no longer uses the tod_stamp() function when +timestamp is set.
365
9f526266
PH
366PH/08 When the original message was included in an autoreply transport, it
367 always said "this is a copy of the message, including all the headers",
368 even if body_only or headers_only was set. It now gives an appropriate
369 message.
370
87fcc8b9
PH
371PH/09 Applied a patch from the Sieve maintainer which:
372
373 o fixes some comments
374 o adds the (disabled) notify extension core
375 o adds some debug output for the result of if/elsif tests
376 o points to the current vacation draft in the documentation
377 and documents the missing references header update
378
379 and most important:
380
381 o fixes a bug in processing the envelope test (when testing
382 multiple envelope elements, the last element determinted the
383 result)
384
456682f5
PH
385PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
386 Electronic Mail") by including:
387
388 Auto-submitted: auto-generated
389
390 in the messages that it generates (bounce messages and others, such as
391 warnings). In the case of bounce messages for non-SMTP mesages, there was
392 also a typo: it was using "Auto_submitted" (underscore instead of
393 hyphen). Since every message generated by Exim is necessarily in response
394 to another message, thes have all been changed to:
395
396 Auto-Submitted: auto-replied
397
398 in accordance with these statements in the RFC:
399
400 The auto-replied keyword:
401
402 - SHOULD be used on messages sent in direct response to another
403 message by an automatic process,
404
405 - MUST NOT be used on manually-generated messages,
406
407 - MAY be used on Delivery Status Notifications (DSNs) and Message
408 Disposition Notifications (MDNs),
409
410 - MUST NOT be used on messages generated by automatic or periodic
411 processes, except for messages which are automatic responses to
412 other messages.
413
3e46c1aa
PH
414PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
415 to the default Received: header definition.
456682f5 416
49826d12
PH
417PH/12 Added log selector acl_warn_skipped (default on).
418
eba0c039
PH
419PH/13 After a successful wildlsearch lookup, discard the values of numeric
420 variables because (a) they are in the wrong storage pool and (b) even if
421 they were copied, it wouldn't work properly because of the caching.
422
a0d6ba8a
PH
423PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
424 checking when decoding. Apparently there are clients that generate
425 overlong encoded strings. Why am I not surprised?
426
f0917727
PH
427PH/15 If the first argument of "${if match_address" was not empty, but did not
428 contain an "@" character, Exim crashed. Now it writes a panic log message
429 and treats the condition as false.
430
096fee00
PH
431PH/16 In autoreply, treat an empty string for "once" the same as unset.
432
024bd3c2
PH
433PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
434 extension "envelope-auth". The code is finished and in agreement with
435 other implementations, but there is no documentation so far and in fact,
436 nobody wrote the draft yet. This extension is currently #undef'ed, thus
437 not changing the active code.
438
439 Print executed "if" and "elsif" statements when debugging is used. This
440 helps a great deal to understand what a filter does.
441
442 Document more things not specified clearly in RFC3028. I had all this
443 sorted out, when out of a sudden new issues came to my mind. Oops."
444
df199fec
PH
445PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
446 (Bugzilla #53).
447
d27f1df3
PH
448PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
449 canonical form (as documented). However, after a host name lookup from
450 the IP address, check_host() was doing a simple string comparison with
451 addresses acquired from the DNS when checking that the found name did
452 have the original IP as one of its addresses. Since any found IPv6
453 addresses are likely to be in abbreviated form, the comparison could
454 fail. Luckily, there already exists a function for doing the comparison
455 by converting both addresses to binary, so now that is used instead of
456 the text comparison.
457
96776534
PH
458PH/20 There was another similar case to PH/19, when a complete host name was
459 given in a host list; looking up its IP address could give an abbreviated
460 form, whereas the current host's name might or might not be abbreviated.
461 The same fix has been applied.
462
5de37277 463
9a799bc0
PH
464Exim version 4.54
465-----------------
466
467PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
468 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
469 It now does.
470
99a4b039
PH
471PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
472 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
473
474PH/03 Typo: missing ".o" in src/pcre/Makefile.
475
4b233853
PH
476PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
477 header line, restrict the check to what is listed in RFCs 2369 and 2929.
478 Also, for "Auto-Submitted", treat anything other than "no" as
479 non-personal, in accordance with RFC 3834. (Previously it treated
480 anything starting "auto-" as non-personal.)
481
8857ccfd
PH
482TF/01 The control=submission/name=... option had a problem with syntax
483 errors if the name included a slash character. The /name= option
484 now slurps the rest of the string, so it can include any characters
485 but it must come last in the list of options (after /sender_retain
486 or /domain=).
487
433a2980
PH
488PH/05 Some modifications to the interface to the fake nameserver for the new
489 testing suite.
490
3e46c1aa 491
9a799bc0 492
e3a311ba
TK
493Exim version 4.53
494-----------------
495
496TK/01 Added the "success_on_redirect" address verification option. See
497 NewStuff for rationale and an example.
498
13b685f9
PH
499PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
500
395ff96d
PH
501PH/02 Patch to exigrep to allow it to work on syslog lines.
502
5b68f6e4
PH
503PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
504 fread() to skip over the body file's header line, because in Cygwin the
505 header line is locked and is inaccessible.
506
1ab52c69
PH
507PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
508 co-exist for some time) to make it clear that it is the Exim ID that is
509 referenced, not the Message-ID: header line.
510
b07e6aa3
PH
511PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
512 string_format() function, because snprintf() does not exist on all
513 operating systems.
514
254e032f
PH
515PH/06 The use of forbid_filter_existstest now also locks out the use of the
516 ${stat: expansion item.
517
3af76a81
PH
518PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
519 protocol synchronization error", to keep the pedants happy.
520
2548ba04
PH
521PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
522 well as for IRIX systems, when gcc is being used. See the host.c source
523 file for comments.
524
b6c6011d
PH
525PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
526
cf39cf57
PH
527PH/10 Named domain lists were not working if used in a queue_smtp_domains
528 setting.
529
f1513293
PH
530PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
531 transport and to the smtp transport in LMTP mode.
532
727549a4
PH
533TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
534
af46795e
PH
535PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
536 run a filter in a subprocess. This could lead to confusion in subsequent
537 lookups in the parent process. There should also be a search_tidyup() at
538 the end of the subprocess.
539
d7b47fd0
PH
540PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
541 only if the host matched helo_try_verify_hosts, which caused the
542 verification to occur when the EHLO/HELO command was issued. The ACL just
543 tested the remembered result. Now, if a previous verification attempt has
544 not happened, "verify = helo" does it there and then.
545
ee744174
JJ
546JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
547
b582ab87
PH
548TK/03 Fix log output including CR from clamd.
549
41a13e0a
PH
550PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
551 exist provoked a memory error which could cause a segfault.
552
f625cc5a
PH
553PH/15 Installed PCRE 6.2
554
555PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
556
21f7af35
PH
557PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
558 of the problem. Specifically, suggested +O2 rather than +O1 for the
559 HP-UX compiler.
560
31480e42
PH
561PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
562
2d280592
PH
563PH/20 If a delivery was routed to a non-standard port by means of an SRV
564 record, the port was not correctly logged when the outgoing_port log
565 selector was set (it logged the transort's default port).
566
7cd1141b
PH
567PH/21 Added support for host-specific ports to manualroute, queryprogram,
568 fallback_hosts, and "hosts" in the smtp transport.
569
570PH/22 If the log selector "outgoing_port" is set, the port is now also given on
571 host errors such as "Connection refused".
572
750af86e
PH
573PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
574 authentication with radiusclient 0.4.9:
575
576 - Error returned from rc_read_config was caught wrongly
577 - Username/password not passed on to radius server due to wrong length.
578
579 The presumption is that some radiusclient API changes for 4.51/PH/17
580 were not taken care of correctly. The code is still untested by me (my
581 Linux distribution still has 0.3.2 of radiusclient), but it was
582 contributed by a Radius user.
583
584PH/24 When doing a callout, the value of $domain wasn't set correctly when
585 expanding the "port" option of the smtp transport.
586
4304270b
TK
587TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
588 while reading a MIME header. Thanks to Tom Hughes for a patch.
589
750af86e
PH
590PH/24 Include config.h inside local_scan.h so that configuration settings are
591 available.
592
64ffc24f
PH
593PH/25 Make $smtp_command_argument available after all SMTP commands. This means
594 that in an ACL for RCPT (for example), you can examine exactly what was
595 received.
596
5dd9625b
PH
597PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
598 commands, but it was not correctly comparing the address with the actual
599 client host address. Thus, it would show the EHLO address in Received:
600 header lines when this was not necessary.
601
5591031b
PH
602PH/27 Added the % operator to ${eval:}.
603
ba18e66a
PH
604PH/28 Exim tries to create and chdir to its spool directory when it starts;
605 it should be ignoring failures (because with -C, for example, it has lost
606 privilege). It wasn't ignoring creation failures other than "already
607 exists".
608
9cec981f
PH
609PH/29 Added "crypteq" to the list of supported features that Exim outputs when
610 -bV or -d is used.
611
aa2b5c79
PH
612PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
613 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
614 too many continuations, the temporary file was not being removed, and the
615 return code was incorrect.
aa2b5c79 616
48a53b7f
PH
617PH/31 Missing "BOOL" in function definition in filtertest.c.
618
1c59d63b
PH
619PH/32 Applied Sieve patches from the maintainer.
620
671012da
TK
621TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
622
1509d3a8
PH
623PH/33 Added "verify = not_blind".
624
625PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
626 Local/Makefile (with some defaults set). These are used in built scripts
627 such as exicyclog, but they have never been used in the exim_install
628 script (though there are many overriding facilities there). I have
629 arranged that the exim_install script now takes note of these two
630 settings.
631
632PH/35 Installed configuration files for Dragonfly.
633
2fe1a124
PH
634PH/36 When a locally submitted message by a trusted user did not contain a
635 From: header, and the sender address was obtained from -f or from an SMTP
636 MAIL command, and the trusted user did not use -F to supply a sender
637 name, $originator_name was incorrectly used when constructing a From:
638 header. Furthermore, $originator_name was used for submission mode
639 messages from external hosts without From: headers in a similar way,
640 which is clearly wrong.
641
8800895a
PH
642PH/37 Added control=suppress_local_fixups.
643
ccfdb010
PH
644PH/38 When log_selector = +received_sender was set, and the addition of the
645 sender made the log line's construction buffer exactly full, or one byte
646 less than full, an overflow happened when the terminating "\n" was
647 subsequently added.
648
1130bfb0
PH
649PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
650 when the result of a list match is failure because a DNS lookup failed.
651
ebcb507f
PH
652PH/40 RM_COMMAND is now used in the building process.
653
c35e155c
PH
654PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
655 the "build-* directories that it finds.
656
95d1f782
PH
657PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
658 address in a domain literal was a prefix of an interface address.
659
fd6de02e
PH
660PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
661 when verifying a sender address, unless rewrite_headers is false.
662
58de37c5
PH
663PH/44 Wrote a long comment about why errors_to addresses are verified as
664 recipients, not senders.
665
261cf466
TF
666TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
667 the ratelimit ACL was added.
668
3ee512ff
PH
669PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
670
e08c430f
PH
671PH/46 Added extra information about PostgreSQL errors to the error string.
672
bef5a11f
PH
673PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
674 avoiding the need to install special zones in a real server. This is
675 backwards compatible; if it can't find the fake resolver, it drops back.
676 Thus, both old and new test suites can be run.
677
7546de58
TF
678TF/02 Added util/ratelimit.pl
679
e5d5a95f
TF
680TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
681 clock is set back in time.
682
2e88a017
TF
683TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
684 Candler <B.Candler@pobox.com>.
685
a5f65aa4
TF
686TF/05 The fix for PH/43 was not completely correct; widen_domains is always
687 OK for addresses that are the result of redirections.
688
e7726cbf
PH
689PH/48 A number of further additions for the benefit of the new test suite,
690 including a fake gethostbyname() that interfaces to the fake DNS resolver
691 (see PH/47 above).
692
a7fdad5b
TF
693TF/06 The fix for widen_domains has also been applied to qualify_single and
694 search_parents which are the other dnslookup options that can cause
695 header rewrites.
696
6af56900
PH
697PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
698 type ("H").
699
0925ede6
PH
700PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
701
66afa403
TF
702TF/07 Exim produced the error message "an SRV record indicated no SMTP
703 service" if it encountered an MX record with an empty target hostname.
704 The message is now "an MX or SRV record indicated no SMTP service".
705
0154e85a
TF
706TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
707 if the DNS of the sending site is misconfigured. This is quite a
708 common situation. This change restores the behaviour of treating a
709 helo verification defer as a failure.
710
16f12c76
PH
711PH/51 If self=fail was set on a router, the bounce message did not include the
712 actual error message.
713
bbe902f0 714
e5a9dba6
PH
715Exim version 4.52
716-----------------
717
718TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
719
22c3b60b
PH
720PH/01 When a transport filter timed out in a pipe delivery, and the pipe
721 command itself ended in error, the underlying message about the transport
722 filter timeout was being overwritten with the pipe command error. Now the
723 underlying error message should be appended to the second error message.
724
06a9b4b5
PH
725TK/01 Fix poll() being unavailable on Mac OSX 10.2.
726
c1ac6996
PH
727PH/02 Reduce the amount of output that "make" produces by default. Full output
728 can still be requested.
729
9c7a242c
PH
730PH/03 The warning log line about a condition test deferring for a "warn" verb
731 was being output only once per connection, rather than after each
732 occurrence (because it was using the same function as for successful
733 "warn" verbs). This seems wrong, so I have changed it.
734
87ba3f5f
PH
735TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
736 it should not have, which might have caused a crash in the right
737 circumstances, but probably never did.
738
739PH/04 Installed a modified version of Tony Finch's patch to make submission
740 mode fix the return path as well as the Sender: header line, and to
741 add a /name= option so that you can make the user's friendly name appear
742 in the header line.
743
29aba418
TF
744TF/03 Added the control = fakedefer ACL modifier.
745
fe0dab11
TF
746TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
747 Mark Lowes for thorough testing.
870f6ba8 748
11d337a4
TK
749TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
750
751TK/03 Merged latest SRS patch from Miles Wilton.
752
415c8f3b
PH
753PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
754 with the definition in sysexits.h (which is #included earlier).
755 Fortunately, Exim does not actually use EX_OK. The code used to try to
756 preserve the sysexits.h value, by assumimg that macro definitions were
757 scanned for macro replacements. I have been disabused of this notion,
758 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 759
958541e9
PH
760PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
761 in the smtp transport. When a block could not be written in a single
762 write() function, the timeout was being re-applied to each part-write.
763 This seems wrong - if the receiver was accepting one byte at a time it
764 would take for ever. The timeout is now adjusted when this happens. It
765 doesn't have to be particularly precise.
766
c206415f
TK
767TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
768 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
769
2a4be8f9
PH
770PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
771 without a domain if the check to <postmaster@domain> fails.
772
1cba11c5
SC
773SC/01 Eximstats: added -xls and the ability to specify output files
774 (patch written by Frank Heydlauf).
775
776SC/02 Eximstats: use FileHandles for outputing results.
777
778SC/03 Eximstats: allow any combination of xls, txt, and html output.
779
780SC/04 Eximstats: fixed display of large numbers with -nvr option
781
782SC/05 Eximstats: fixed merging of reports with empty tables.
783
784SC/06 Eximstats: added the -include_original_destination flag
785
786SC/07 Eximstats: removed tabs and trailing whitespace.
787
1005d00e
TK
788TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
789
790TK/06 MBOX spool code: Add real "From " MBOX separator line
791 so the .eml file is really in mbox format (even though
792 most programs do not really care). Patch from Alex Miller.
793
794TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
795 The latter is generated from $received_to and is only set if the
796 message has one envelope recipient. SA can use these headers,
797 obviously out-of-the-box. Patch from Alex Miller.
798
9b4768fa
PH
799PH/08 The ${def test on a variable was returning false if the variable's
800 value was "0", contrary to what the specification has always said!
801 The result should be true unless the variable is empty.
802
803PH/09 The syntax error of a character other than { following "${if
804 def:variable_name" (after optional whitespace) was not being diagnosed.
805 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
806 accidental colon was present, for example, could give incorrect results.
807
0d7eb84a
PH
808PH/10 Tidied the code in a number of places where the st_size field of a stat()
809 result is used (not including appendfile, where other changes are about
810 to be made).
811
812PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
813 This involved changing a lot of size variables from int to off_t. It
814 should work with maildirs and everything.
815
40727bee
TK
816TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
817 spamd dying while we are connected to it.
818
554d2369
TF
819TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
820 <jgh@wizmail.org>
821
1f922db1
PH
822PH/12 Applied Alex Kiernan's patch for the API change for the error callback
823 function for BDB 4.3.
824
ef213c3b
PH
825PH/13 Changed auto_thaw such that it does not apply to bounce messages.
826
8ac170f3
PH
827PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
828 the sources for PCRE have been re-arranged and more files are now
829 involved.
830
b1c749bb
PH
831PH/15 The code I had for printing potentially long long variables in PH/11
832 above was not the best (it lost precision). The length of off_t variables
833 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
834 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
835 to be "long long int" or "long int". This is needed for the internal
836 formatting function string_vformat().
b1c749bb 837
4aac9b49
PH
838PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
839 the configuration file to be ":syslog", then the script "guesses" where
840 the logs files are, rather than using the compiled in default. In our
841 case the guess is not the same as the compiled default, so the script
842 suddenly stopped working when I started to use syslog. The patch checks
843 to see if log_file_path is "". If so, it attempts to read it from exim
844 with no configuration file to get the compiled in version, before it
845 falls back to the previous guessing code."
846
294520c8
TK
847TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
848 implementing BATV in an Exim configuration. See NewStuff for the gory
849 details.
850
5bd022fe
PH
851PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
852 Makefile that are specific to HP-UX.
853
90e9ce59
PH
854PH/18 If the "use_postmaster" option was set for a recipient callout together
855 with the "random" option, the postmaster address was used as the MAIL
856 FROM address for the random test, but not for the subsequent recipient
857 test. It is now used for both.
858
5ea81592
PH
859PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
860 patch removes a few documentation additions to RFC 3028, because the
861 latest draft now contains them. It adds the new en;ascii-case comparator
862 and a new error check for 8bit text in MIME parts. Comparator and
863 require names are now matched exactly. I enabled the subaddress
864 extension, but it is not well tested yet (read: it works for me)."
865
c6c2dc1d
PH
866PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
867 rework some of the code of TK/09 above to avoid the hardwired use of
868 "%lld" and "long long". Replaced the call to snprintf() with a call to
869 string_vformat().
870
fffffe4c
PH
871PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
872 records point to non-existent hosts", "retry timeout exceeded", and
873 "retry time not reached for any host after a long failure period".
ca02eafb 874
9a26b6b2
PH
875PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
876 experimental DomainKeys support:
877
878 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
879 (2) On an error such as an illegally used "control", the wrong name for
880 the control was given.
881
882 These problems did NOT occur unless DomainKeys support was compiled.
883
4aee0225
PH
884PH/23 Added daemon_startup_retries and daemon_startup_sleep.
885
32d668a5
PH
886PH/24 Added ${if match_ip condition.
887
8187c3f3
PH
888PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
889 databases so that it will be absolutely obvious if a crash occurs in the
890 DB library. This is a regular occurrence (often caused by mis-matched
891 db.h files).
892
ff790e47 893PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
894 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
895 picked up on a user's system that detects such things. There doesn't seem
896 to be a gcc warning option for this - only an attribute that has to be
897 put on the function's prototype. It seems that in Fedora Core 4 they have
898 set this on a number of new functions. No doubt there will be more in due
899 course.
ff790e47 900
5417f6d1
PH
901PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
902 specify a transport. However, if an address that was verified by such a
903 router was the subject of a callout, Exim crashed because it tried to
904 read the rcpt_include_affixes from the non-existent transport. Now it
905 just assumes that the setting of that option is false. This bug was
906 introduced by 4.51/PH/31.
907
59cf8544
PH
908PH/28 Changed -d+all to exclude +memory, because that information is very
909 rarely of interest, but it makes the output a lot bigger. People tend to
910 do -d+all out of habit.
911
e7ad8a65
PH
912PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
913 code in os-type was giving problems when libc.so lives in lib64, like on
914 x86_64 Fedora Core.
915
ade42478
PH
916PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
917 aren't the modern standard, and it seems that some systems' include files
918 don't always have them. Exim was already checking for some of the newer
919 ones like T_AAAA, and defining it itself. I've added checks for all the
920 record types that Exim uses.
921
182ad5cf
PH
922PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
923 not automatically generating a new one, as it is supposed to. This
924 prevented TLS from working. If the file did exist, but contained invalid
925 data, a new version was generated, as expected. It was only the case of a
926 non-existent file that was broken.
927
b0d9fc80
TK
928TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
929 with a change in libdomainkeys > 0.64.
930
931TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
932 from DNS. If the selector record carries the flag, it now has
933 precedence over the domain-wide flag.
934
935TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
936
47c7a64a
PH
937PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
938 the use of a port name that isn't defined in /etc/services) occurred, the
939 message was deferred as in a normal delivery, and thus remained on the
940 spool, instead of being failed because of the mua_wrapper setting. This
941 is now fixed, and I tidied up some of the mua_wrapper messages at the
942 same time.
943
a388bce4
SC
944SC/08 Eximstats: whilst parsing the mainlog(s), store information about
945 the messages in a hash of arrays rather than using individual hashes.
946 This is a bit cleaner and results in dramatic memory savings, albeit
947 at a slight CPU cost.
948
949SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
950 as requested by Marc Sherman.
951
952SC/10 Eximstats: added histograms for user specified patterns as requested
953 by Marc Sherman.
954
0793e4ed
SC
955SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
956
c58b88df
PH
957PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
958 fopen() in the content-scanning modules that did not already have it.
959
e7ad8a65 960
7982096b
PH
961Exim version 4.51
962-----------------
963
1a46a8c5
PH
964TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
965 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
966
2f079f46 967TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
968
969TK/03 Fix ACL "regex" condition not being available in MIME ACL.
970
971PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
972 to test Sieve filters that use "vacation".
973
974PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
975 that changes the way the GnuTLS parameters are stored in the cache file.
976 The new format can be generated externally. For backward compatibility,
977 if the data in the cache doesn't make sense, Exim assumes it has read an
978 old-format file, and it generates new data and writes a new file. This
979 means that you can't go back to an older release without removing the
980 file.
981
982PH/03 A redirect router that has both "unseen" and "one_time" set does not
983 work if there are any delivery delays because "one_time" forces the
984 parent to be marked "delivered", so its unseen clone is never tried
985 again. For this reason, Exim now forbids the simultaneous setting of
986 these two options.
987
988PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
989 redirected to themselves ("homonym" addresses). Read the long ChangeLog
990 entry if you want to know the details. The fix, however, neglected to
991 consider the case when local delivery batching is involved. The test for
992 "previously delivered" was not happening when checking to see if an
993 address could be batched with a previous (undelivered) one; under
994 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 995 address.
1a46a8c5
PH
996
997PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
998 in its include files, and this causes problems building Exim.
999
1000PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1001 header_syntax) but Exim was just ignoring anything given after a slash.
1002 In particular, this caused confusion with an attempt to use "verify =
1003 reverse_host_lookup/defer_ok". An error is now given when options are
1004 supplied for verify items that do not have them. (Maybe reverse_host_
1005 lookup should have a defer_ok option, but that's a different point.)
1006
1007PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1008 defined by RFC 821) to 2048, because there were problems with some AUTH
1009 commands, and RFC 1869 says the size should be increased for extended
1010 SMTP commands that take arguments.
1011
1012PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1013 Finch).
1014
1015PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1016 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1017
49c2d5ea
PH
1018PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1019 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1020 whatever). Otherwise the password may appear in the log. Following change
1021 PH/42 below, there is no longer a chance of it appearing in a bounce
1022 message.
49c2d5ea 1023
bf759a8b
PH
1024PH/11 Installed exipick version 20050225.0 from John Jetmore.
1025
83364d30
PH
1026PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1027 of its addresses was ever tried. (Bugzilla bug #2.)
1028
7999bbd7
PH
1029PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1030 the result incorrectly in the debug output. (It correctly added a newline
1031 to what was transported.)
1032
7dbf77c9
PH
1033TF/01 Added $received_time.
1034
74e0617f
PH
1035PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1036 commented out examples of how to interface to a virus scanner and to
1037 SpamAssassin. Also added commented examples of av_scanner and
1038 spamd_address settings.
1039
2f079f46
PH
1040PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1041 and controls are allowed in which ACLs. There were a couple of minor
1042 errors. Some of the entries in the conditions table (which is a table of
1043 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1044 negation of where the condition IS allowed.
1045
8c841523
PH
1046PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1047
7766a4f0
PH
1048PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1049 header file does not have a version number, so I've had to invent a new
1050 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1051 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1052 radiusclient), but it was contributed by a Radius user.
1053
8b417f2c
PH
1054PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1055 files or directories, for OpenSSL.
1056
901f42cb
PH
1057PH/19 When an Exim process that is running as root has to create an Exim log
1058 file, it does so in a subprocess that runs as exim:exim so as to get the
1059 ownership right at creation (otherwise, other Exim processes might see
1060 the file with the wrong ownership). There was no test for failure of this
1061 fork() call, which would lead to the process getting stuck as it waited
1062 for a non-existent subprocess. Forks do occasionally fail when resources
1063 run out. I reviewed all the other calls to fork(); they all seem to check
1064 for failure.
1065
f9b9210e
PH
1066PH/20 When checking for unexpected SMTP input at connect time (before writing
1067 the banner), Exim was not dealing correctly with a non-positive return
1068 from the read() function. If the client had disconnected by this time,
1069 the result was a log entry for a synchronization error with an empty
1070 string after "input=" when read() returned zero. If read() returned -1
1071 (an event I could not check), uninitialized data bytes were printed.
1072 There were reports of junk text (parts of files, etc) appearing after
1073 "input=".
1074
54cdb463
PH
1075PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1076
cf00dad6
PH
1077PH/22 Added support for macro redefinition, and (re)definition in between
1078 driver and ACL definitions.
1079
acb1b346
PH
1080PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1081 forgetting to use the resulting value; it was using the unexpanded value.
1082
c5ddb310
PH
1083PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1084 hadn't been configured. The fix is from Juergen Kreileder, who
1085 understands it better than I do:
1086
1087 "Here's what I see happening with three configured cyrus_sasl
1088 authenticators configured (plain, login, cram-md5):
1089
1090 On startup auth_cyrus_sasl_init() gets called for each of these.
1091 This means three calls to sasl_listmech() without a specified mech_list.
1092 => SASL tests which mechs of all available mechs actually work
1093 => three warnings about OTP not working
1094 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1095
1096 With the patch, sasl_listmech() also gets called three times. But now
1097 SASL's mech_list option is set to the server_mech specified in the the
1098 authenticator. Or in other words, the answer from sasl_listmech()
1099 gets limited to just the mech you're testing for (which is different
1100 for each call.)
1101 => the return list contains just 'plain' or 'login', 'cram-md5' or
1102 nothing depending on the value of ob->server_mech.
1103
1104 I've just tested the patch: Authentication still works fine,
1105 unavailable mechs specified in the exim configuration are still
1106 caught, and the auth.log warnings about OTP are gone."
1107
31619da6
PH
1108PH/25 When debugging is enabled, the contents of the command line are added
1109 to the debugging output, even when log_selector=+arguments is not
1110 specified.
1111
bebaf0fc
PH
1112PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1113 answer is "GNU", and only if the return is "GNU/something" is the answer
1114 "Linux".
1115
475fe28a
PH
1116PH/27 $acl_verify_message is now set immediately after the failure of a
1117 verification in an ACL, and so is available in subsequent modifiers. In
1118 particular, the message can be preserved by coding like this:
1119
1120 warn !verify = sender
1121 set acl_m0 = $acl_verify_message
1122
1123 Previously, $acl_verify_message was set only while expanding "message"
1124 and "log_message" when a very denied access.
1125
7e8bec7a
PH
1126PH/28 Modified OS/os.c-Linux with
1127
1128 -#ifndef OS_LOAD_AVERAGE
1129 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1130
1131 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1132 nomenclature these days.)
1133
e4a89c47
PH
1134PH/29 Installed patch from the Sieve maintainer that adds the options
1135 sieve_useraddress and sieve_subaddress to the redirect router.
1136
5ca2a9a1
PH
1137PH/30 In these circumstances:
1138 . Two addresses routed to the same list of hosts;
1139 . First host does not offer TLS;
1140 . First host accepts first address;
1141 . First host gives temporary error to second address;
1142 . Second host offers TLS and a TLS session is established;
1143 . Second host accepts second address.
1144 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1145 and peerdn, if requested) that were in fact used only for the second
1146 address.
7e8bec7a 1147
c688b954
PH
1148PH/31 When doing a callout as part of verifying an address, Exim was not paying
1149 attention to any local part prefix or suffix that was matched by the
1150 router that accepted the address. It now behaves in the same way as it
1151 does for delivery: the affixes are removed from the local part unless
1152 rcpt_include_affixes is set on the transport.
1153
fed77020
PH
1154PH/32 Add the sender address, as F=<...>, to the log line when logging a
1155 timeout during the DATA phase of an incoming message.
1156
7fe1560f
PH
1157PH/33 Sieve envelope tests were broken for match types other than :is. I have
1158 applied a patch sanctioned by the Sieve maintainer.
c688b954 1159
ebb6e6d5
PH
1160PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1161 the uid or gid is negative. A case of a negative gid caused this to be
1162 noticed. The fix allows for either to be negative.
1163
9c4e8f60
PH
1164PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1165 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1166 overlooked.
1167
1168PH/36 The change PH/12 above was broken. Fixed it.
1169
d7174846
PH
1170PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1171 the grounds that routing the same address twice would always produce the
1172 same answer. This might have been true once, but it is certainly no
1173 longer true now. Routing a child address may depend on the previous
1174 routing that produced that child. Some complicated redirection strategies
1175 went wrong when messages had multiple recipients, and made Exim's
1176 behaviour dependent on the order in which the addresses were given.
1177
1178 I have moved the duplicate checking until after the routing is complete.
1179 Exim scans the addresses that are assigned to local and remote
1180 transports, and removes any duplicates. This means that more work will be
1181 done, as duplicates will always all be routed, but duplicates are
1182 presumably rare, so I don't expect this is of any significance.
1183
1184 For deliveries to pipes, files, and autoreplies, the duplicate checking
1185 still happens during the routing process, since they are not going to be
1186 routed further.
1187
cfe75fc3
PH
1188PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1189 It corrects a timeout issue with spamd. This is Ian's comment: "The
1190 background is that sometimes spamd either never reads data from a
1191 connection it has accepted, or it never writes response data. The exiscan
1192 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1193 blindly assumes that writes won't block so it may never time out."
1194
be22d70e
PH
1195PH/39 Allow G after quota size as well as K and M.
1196
0612b098
PH
1197PH/40 The value set for $authenticated_id in an authenticator may not contain
1198 binary zeroes or newlines because the value is written to log lines and
1199 to spool files. There was no check on this. Now the value is run through
1200 the string_printing() function so that such characters are converted to
1201 printable escape sequences.
1202
2e0c1448
PH
1203PH/41 $message_linecount is a new variable that contains the total number of
1204 lines in the message. Compare $body_linecount, which is the count for the
1205 body only.
1206
447d236c
PH
1207PH/42 Exim no longer gives details of delivery errors for specific addresses in
1208 bounce and delay warning messages, except in certain special cases, which
1209 are as follows:
1210
1211 (a) An SMTP error message from a remote host;
1212 (b) A message specified in a :fail: redirection;
1213 (c) A message specified in a "fail" command in a system filter;
1214 (d) A message specified in a FAIL return from the queryprogram router;
1215 (e) A message specified by the cannot_route_message router option.
1216
1217 In these cases only, Exim does include the error details in bounce and
1218 warning messages. There are also a few cases where bland messages such
1219 as "unrouteable address" or "local delivery error" are given.
1220
d20976dc
PH
1221PH/43 $value is now also set for the "else" part of a ${run expansion.
1222
f656d135
PH
1223PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1224 being worked on, but at least Exim now implements the latest version to
1225 play with."
1226
2e2a30b4
PH
1227PH/45 In a pipe transport, although a timeout while waiting for the pipe
1228 process to complete was treated as a delivery failure, a timeout while
1229 writing the message to the pipe was logged, but erroneously treated as a
1230 successful delivery. Such timeouts include transport filter timeouts. For
1231 consistency with the overall process timeout, these timeouts are now
1232 treated as errors, giving rise to delivery failures by default. However,
1233 there is now a new Boolean option for the pipe transport called
1234 timeout_defer, which, if set TRUE, converts the failures into defers for
1235 both kinds of timeout. A transport filter timeout is now identified in
1236 the log output.
1237
9176e9f0
PH
1238PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1239 systems where "make" and "gmake" are different, calling "gmake" at top
1240 level broke things. I've arranged for the value of $(MAKE) to be passed
1241 from the Makefile to this script so that it can call the same version of
1242 "make".
1243
7982096b 1244
bbe902f0
PH
1245A note about Exim versions 4.44 and 4.50
1246----------------------------------------
1247
1248Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1249changes of various kinds. As a consequence, a big documentation update was
1250needed. This delayed the release for rather longer than seemed good, especially
1251in the light of a couple of (minor) security issues. Therefore, the changes
1252that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1253release. So 4.44 and 4.50 are in effect two different branches that both start
1254from 4.43.
1255
1256I have left the 4.50 change log unchanged; it contains all the changes since
12574.43. The change log for 4.44 is below; many of its items are identical to
1258those for 4.50. This seems to be the most sensible way to preserve the
1259historical information.
1260
1261
f7b63901 1262Exim version 4.50
495ae4b0
PH
1263-----------------
1264
5fe762f6
PH
1265 1. Minor wording change to the doc/README.SIEVE file.
1266
139059f6 1267 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1268 computation of the current number of files was incorrect.
495ae4b0 1269
7086e875
PH
1270 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1271 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1272 place.
1273
35af9f61
PH
1274 4. Give more explanation in the error message when the command for a transport
1275 filter fails to execute.
1276
b668c215
PH
1277 5. There are several places where Exim runs a non-Exim command in a
1278 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1279 was being done only for the command run by the queryprogram router. It is
1280 now done for all such subprocesses. The other cases are: ${run, transport
1281 filters, and the commands run by the lmtp and pipe transports.
1282
a494b1e1
PH
1283 6. Added CONFIGURE_GROUP build-time option.
1284
1285 7. Some older OS have a limit of 256 on the maximum number of file
1286 descriptors. Exim was using setrlimit() to set 1000 as a large value
1287 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1288 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1289
c5fcb476
PH
1290 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1291 was an oversight, and furthermore, ever since the addition of extra
1292 controls (e.g. 4.43/32), the checks on when to allow different forms of
1293 "control" were broken. There should now be diagnostics for all cases when a
1294 control that does not make sense is encountered.
1295
69358f02
PH
1296 9. Added the /retain_sender option to "control=submission".
1297
5be20824
PH
129810. $recipients is now available in the predata ACL (oversight).
1299
eb2c0248
PH
130011. Tidy the search cache before the fork to do a delivery from a message
1301 received from the command line. Otherwise the child will trigger a lookup
1302 failure and thereby defer the delivery if it tries to use (for example) a
1303 cached ldap connection that the parent has called unbind on.
1304
2a3eea10
PH
130512. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1306 of $address_data from the recipient verification was clobbered by the
1307 sender verification.
1308
130913. The value of address_data from a sender verification is now available in
1310 $sender_address_data in subsequent conditions in the ACL statement.
1311
23c7ff99
PH
131214. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1313
4deaf07d
PH
131415. Added a new option "connect=<time>" to callout options, to set a different
1315 connection timeout.
1316
926e1192
PH
131716. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1318 was its contents. (It was OK if the option was not defined at all.)
1319
650edc6f
PH
132017. A "Completed" log line is now written for messages that are removed from
1321 the spool by the -Mrm option.
1322
2c7db3f5
PH
132318. New variables $sender_verify_failure and $recipient_verify_failure contain
1324 information about exactly what failed.
1325
3d235903
PH
132619. Added -dd to debug only the daemon process.
1327
7c7ad977
PH
132820. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1329 handles timeouts, both on the server side and network timeouts. Renamed the
1330 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1331
981756db
PH
133221. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1333 It is now set to "smtps".
1334
d4eb88df
PH
133522. $host_address is now set to the target address during the checking of
1336 ignore_target_hosts.
1337
133823. When checking ignore_target_hosts for an ipliteral router, no host name was
1339 being passed; this would have caused $sender_host_name to have been used if
1340 matching the list had actually called for a host name (not very likely,
1341 since this list is usually IP addresses). A host name is now passed as
1342 "[x.x.x.x]".
1343
7d468ab8
PH
134424. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1345 code that specifies a non-restarting handler (typically sigaction() in
1346 modern systems) in an attempt to fix a rare and obscure crash bug.
1347
134825. Narrowed the window for a race in the daemon that could cause it to ignore
1349 SIGCHLD signals. This is not a major problem, because they are used only to
1350 wake it up if nothing else does.
1351
62c0818f
PH
135226. A malformed maildirsize file could cause Exim to calculate negative values
1353 for the mailbox size or file count. Odd effects could occur as a result.
1354 The maildirsize information is now recalculated if the size or filecount
1355 end up negative.
1356
26034054
PH
135727. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1358 support for a long time. Removed HAVE_SYS_VFS_H.
1359
af66f652
PH
136028. Installed the latest version of exipick from John Jetmore.
1361
90af77f4
PH
136229. In an address list, if the pattern was not a regular expression, an empty
1363 subject address (from a bounce message) matched only if the pattern was an
1364 empty string. Non-empty patterns were not even tested. This was the wrong
1365 because it is perfectly reasonable to use an empty address as part of a
1366 database query. An empty address is now tested by patterns that are
1367 lookups. However, all the other forms of pattern expect the subject to
1368 contain a local part and a domain, and therefore, for them, an empty
1369 address still always fails if the pattern is not itself empty.
1370
d8ef3577
PH
137130. Exim went into a mad DNS loop when attempting to do a callout where the
1372 host was specified on an smtp transport, and looking it up yielded more
1373 than one IP address.
1374
5cb8cbc6
PH
137531. Re-factored the code for checking spool and log partition space into a
1376 function that finds that data and another that does the check. The former
1377 is then used to implement four new variables: $spool_space, $log_space,
1378 $spool_inodes, and $log_inodes.
1379
14702f5b
PH
138032. The RFC2047 encoding function was originally intended for short strings
1381 such as real names; it was not keeping to the 75-character limit for
1382 encoded words that the RFC imposes. It now respects the limit, and
1383 generates multiple encoded words if necessary. To be on the safe side, I
1384 have increased the buffer size for the ${rfc2047: expansion operator from
1385 1024 to 2048 bytes.
1386
063b1e99
PH
138733. It is now permitted to omit both strings after an "if" condition; if the
1388 condition is true, the result is "true". As before, when the second string
1389 is omitted, a false condition yields an empty string. This makes it less
1390 cumbersome to write custom ACL and router conditions.
1391
652e1b65
PH
139234. Failure to deliver a bounce message always caused it to be frozen, even if
1393 there was an errors_to setting on the router. The errors_to setting is now
1394 respected.
1395
6f0c9a4f
PH
139635. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1397 canonical form (fully expanded) before being placed in
1398 $sender_host_address.
1399
33397d19
PH
140036. The table in the code that translates DNS record types into text (T_A to
1401 "A" for instance) was missing entries for NS and CNAME. It is just possible
1402 that this could have caused confusion if both these types were looked up
1403 for the same domain, because the text type is used as part of Exim's
1404 per-process caching. But the chance of anyone hitting this buglet seems
1405 very small.
1406
7bb56e1f
PH
140737. The dnsdb lookup has been extended in a number of ways.
1408
1409 (1) There is a new type, "zns", which walks up the domain tree until it
1410 finds some nameserver records. It should be used with care.
1411
ea3bc19b
PH
1412 (2) There is a new type, "mxh", which is like "mx" except that it returns
1413 just the host names, not the priorities.
1414
1415 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1416 looked up. The behaviour when one of the lookups defers can be
1417 controlled by a keyword.
7bb56e1f 1418
ea3bc19b 1419 (4) It is now possible to specify the separator character for use when
7bb56e1f 1420 multiple records are returned.
33397d19 1421
0bcb2a0e
PH
142238. The dnslists ACL condition has been extended: it is now possible to supply
1423 a list of IP addresses and/or domains to be looked up in a particular DNS
1424 domain.
1425
2ac0e484
PH
142639. Added log_selector=+queue_time_overall.
1427
4e1fde53
PH
142840. When running the queue in the test harness, wait just a tad after forking a
1429 delivery process, to get repeatability of debugging output.
1430
de365ded
PH
143141. Include certificate and key file names in error message when GnuTLS fails
1432 to set them up, because the GnuTLS error message doesn't include the name
1433 of the failing file when there is a problem reading it.
1434
f05da2e8
PH
143542. Allow both -bf and -bF in the same test run.
1436
d6453af2
PH
143743. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1438
f7b63901
PH
143944. The "Exiscan patch" is now merged into the mainline Exim source.
1440
144145. Sometimes the final signoff response after QUIT could fail to get
1442 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1443 < 0 before doing a fflush(). This bug looks as though it goes back to the
1444 introduction of TLS in release 3.20, but "sometimes" must have been rare
1445 because the tests only now provoked it.
1446
a444213a
PH
144746. Reset the locale to "C" after calling embedded Perl, in case it was changed
1448 (this can affect the format of dates).
1449
0ec020ea
PH
145047. exim_tidydb, when checking for the continued existence of a message for
1451 which it has found a message-specific retry record, was not finding
1452 messages that were in split spool directories. Consequently, it was
1453 deleting retry records that should have stayed in existence.
1454
b1206957
PH
145548. Steve fixed some bugs in eximstats.
1456
145749. The SPA authentication driver was not abandoning authentication and moving
1458 on to the next authenticator when an expansion was forced to fail,
1459 contradicting the general specification for all authenticators. Instead it
1460 was generating a temporary error. It now behaves as specified.
1461
26dd5a95
PH
146250. The default ordering of permitted cipher suites for GnuTLS was pessimal
1463 (the order specifies the preference for clients). The order is now AES256,
1464 AES128, 3DES, ARCFOUR128.
1465
343b2385
PH
146651. Small patch to Sieve code - explicitly set From: when generating an
1467 autoreply.
1468
1c5466b9
PH
146952. Exim crashed if a remote delivery caused a very long error message to be
1470 recorded - for instance if somebody sent an entire SpamAssassin report back
1471 as a large number of 550 error lines. This bug was coincidentally fixed by
1472 increasing the size of one of Exim's internal buffers (big_buffer) that
1473 happened as part of the Exiscan merge. However, to be on the safe side, I
1474 have made the code more robust (and fixed the comments that describe what
1475 is going on).
1476
55ee9ee3
PH
147753. Now that there can be additional text after "Completed" in log lines (if
1478 the queue_time_overall log selector is set), a one-byte patch to exigrep
1479 was needed to allow it to recognize "Completed" as not the last thing in
1480 the line.
1481
d38f8232
PH
148254. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1483 patch that reportedly fixes this has been added. I am not expert enough to
1484 create a test for it. This is what the patch creator wrote:
1485
1486 "I found a little strange behaviour of ldap code when working with
1487 Windows 2003 AD Domain, where users was placed in more than one
1488 Organization Units. When I tried to give exim partial DN, the exit code
1489 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1490 But simultaneously result of request was absolutely normal ldap result,
1491 so I produce this patch..."
1492
3295e65b
PH
1493 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1494 REFERENCE, so I have modified the code to exclude the patch when that macro
1495 is not defined.
1496
7102e136
PH
149755. Some experimental protocols are using DNS PTR records for new purposes. The
1498 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1499 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1500 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1501 CAN-2005-0021
7102e136 1502
3ca0ba97
PH
150356. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1504
c2bcbe20
PH
150557. Double the size of the debug message buffer (to 2048) so that more of very
1506 long debug lines gets shown.
1507
18ce445d
PH
150858. The exicyclog utility now does better if the number of log files to keep
1509 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1510
1f5b4c3d
PH
151159. Two changes related to the smtp_active_hostname option:
1512
1513 (1) $smtp_active_hostname is now available as a variable.
1514 (2) The default for smtp_banner uses $smtp_active_hostname instead
1515 of $primary_hostname.
1516
b975ba52
PH
151760. The host_aton() function is supposed to be passed a string that is known
1518 to be a valid IP address. However, in the case of IPv6 addresses, it was
1519 not checking this. This is a hostage to fortune. Exim now panics and dies
1520 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1521 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1522 components; fortuitously, this particular loophole had already been fixed
1523 by change 4.50/55 above.
1524
1525 If there are any other similar loopholes, the new check in host_aton()
1526 itself should stop them being exploited. The report I received stated that
1527 data on the command line could provoke the exploit when Exim was running as
1528 exim, but did not say which command line option was involved. All I could
1529 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1530 running as the user.
ea3a6f44 1531 CAN-2005-0021
85b87bc2
PH
1532
153361. There was a buffer overflow vulnerability in the SPA authentication code
1534 (which came originally from the Samba project). I have added a test to the
1535 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1536 CAN-2005-0022
b975ba52 1537
17ffcae7
PH
153862. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1539 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1540
d95f9fdb
PH
154163. The daemon start-up calls getloadavg() while still root for those OS that
1542 need the first call to be done as root, but it missed one case: when
1543 deliver_queue_load_max is set with deliver_drop_privilege. This is
1544 necessary for the benefit of the queue runner, because there is no re-exec
1545 when deliver_drop_privilege is set.
1546
86b8287f
PH
154764. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1548 This has been fixed.
1549
60dc5e56
PH
155065. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1551 was in use, was not putting the data itself into the right store pool;
1552 consequently, it could be overwritten for a subsequent message in the same
1553 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1554 the caching.)
1555
533244af
PH
155666. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1557
a5a28604
PH
155867. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1559 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1560 the function were treating the return as a boolean value, which happened to
1561 work because 0=false and not-0=true, but is not correct code.
1562
7e634d24
PH
156368. The host_aton() function was not handling scoped IPv6 addresses (those
1564 with, for example, "%eth0" on the end) correctly.
1565
3e11c26b
PH
156669. Fixed some compiler warnings in acl.c for the bitmaps specified with
1567 negated items (that is, ~something) in unsigned ints. Some compilers
1568 apparently mutter when there is no cast.
1569
6729cf78
PH
157070. If an address verification called from an ACL failed, and did not produce a
1571 user-specific message (i.e. there was only a "system" message), nothing was
1572 put in $acl_verify_message. In this situation, it now puts the system
1573 message there.
1574
00f00ca5
PH
157571. Change 4.23/11 added synchronization checking at the start of an SMTP
1576 session; change 4.31/43 added the unwanted input to the log line - except
1577 that it did not do this in the start of session case. It now does.
1578
c9bdd01c
PH
157972. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1580 This is wrong and can cause the other end to generate a synchronization
1581 error if it is another Exim or anything else that does the synchronization
1582 check. A QUIT command is no longer sent after a timeout.
1583
d43194df
PH
158473. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1585 during host lookups.
1586
fe5b5d0b
PH
158774. The defer_ok option of callout verification was not working if it was used
1588 when verifying addresses in header lines, that is, for this case:
1589
1590 verify = header_sender/callout=defer_ok
1591
76a2d7ba
PH
159275. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1593 those file descriptors could be used for SMTP connections. If anything
1594 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1595 could be sent to the SMTP client, causing chaos. The daemon now opens
1596 stdin, stdout, and stderr to /dev/null when it puts itself into the
1597 background.
1598
159976. Arrange for output from Perl's "warn" command to be written to Exim's main
1600 log by default. The user can override this with suitable Perl magic.
1601
04f7d5b9
PH
160277. The use of log_message on a "discard" ACL verb, which is supposed to add to
1603 the log message when discard triggers, was not working for the DATA ACL or
1604 for the non-SMTP ACL.
1605
bc60667e
PH
160678. Error message wording change in sieve.c.
1607
bb6e88ff
PH
160879. If smtp_accept_max_per_host was set, the number of connections could be
1609 restricted to fewer than expected, because the daemon was trying to set up
1610 a new connection before checking whether the processes handling previous
1611 connections had finished. The check for completed processes is now done
1612 earlier. On busy systems, this bug wouldn't be noticed because something
1613 else would have woken the daemon, and it would have reaped the completed
1614 process earlier.
1615
1e70f85b
PH
161680. If a message was submitted locally by a user whose login name contained one
1617 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1618 It caused a spool format error. I have fixed the spool reading code. A
1619 related problem was that the "from" clause in the Received: line became
1620 illegal because of the space(s). It is now covered by ${quote_local_part.
1621
162281. Included the latest eximstats from Steve (adds average sizes to HTML Top
1623 tables).
1624
4e01f9d6
PH
162582. Updated OS/Makefile-AIX as per message from Mike Meredith.
1626
1ee1cef2
PH
162783. Patch from Sieve maintainer to fix unterminated string problem in
1628 "vacation" handling.
1629
6e2b4ccc
PH
163084. Some minor changes to the Linux configuration files to help with other
1631 OS variants using glibc.
1632
8e669ac1
PH
163385. One more patch for Sieve to update vacation handling to latest spec.
1634
495ae4b0 1635
bbe902f0
PH
1636----------------------------------------------------
1637See the note above about the 4.44 and 4.50 releases.
1638----------------------------------------------------
1639
1640
1641Exim version 4.44
1642-----------------
1643
1644 1. Change 4.43/35 introduced a bug that caused file counts to be
1645 incorrectly computed when quota_filecount was set in an appendfile
1646 transport
1647
1648 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1649 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1650 place.
1651
1652 3. Give more explanation in the error message when the command for a transport
1653 filter fails to execute.
1654
1655 4. There are several places where Exim runs a non-Exim command in a
1656 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1657 was being done only for the command run by the queryprogram router. It is
1658 now done for all such subprocesses. The other cases are: ${run, transport
1659 filters, and the commands run by the lmtp and pipe transports.
1660
1661 5. Some older OS have a limit of 256 on the maximum number of file
1662 descriptors. Exim was using setrlimit() to set 1000 as a large value
1663 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1664 systems. I've change it so that if it can't get 1000, it tries for 256.
1665
1666 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1667 was an oversight, and furthermore, ever since the addition of extra
1668 controls (e.g. 4.43/32), the checks on when to allow different forms of
1669 "control" were broken. There should now be diagnostics for all cases when a
1670 control that does not make sense is encountered.
1671
1672 7. $recipients is now available in the predata ACL (oversight).
1673
1674 8. Tidy the search cache before the fork to do a delivery from a message
1675 received from the command line. Otherwise the child will trigger a lookup
1676 failure and thereby defer the delivery if it tries to use (for example) a
1677 cached ldap connection that the parent has called unbind on.
1678
1679 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1680 of $address_data from the recipient verification was clobbered by the
1681 sender verification.
1682
168310. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1684 was its contents. (It was OK if the option was not defined at all.)
1685
168611. A "Completed" log line is now written for messages that are removed from
1687 the spool by the -Mrm option.
1688
168912. $host_address is now set to the target address during the checking of
1690 ignore_target_hosts.
1691
169213. When checking ignore_target_hosts for an ipliteral router, no host name was
1693 being passed; this would have caused $sender_host_name to have been used if
1694 matching the list had actually called for a host name (not very likely,
1695 since this list is usually IP addresses). A host name is now passed as
1696 "[x.x.x.x]".
1697
169814. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1699 code that specifies a non-restarting handler (typically sigaction() in
1700 modern systems) in an attempt to fix a rare and obscure crash bug.
1701
170215. Narrowed the window for a race in the daemon that could cause it to ignore
1703 SIGCHLD signals. This is not a major problem, because they are used only to
1704 wake it up if nothing else does.
1705
170616. A malformed maildirsize file could cause Exim to calculate negative values
1707 for the mailbox size or file count. Odd effects could occur as a result.
1708 The maildirsize information is now recalculated if the size or filecount
1709 end up negative.
1710
171117. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1712 support for a long time. Removed HAVE_SYS_VFS_H.
1713
ea3a6f44 171418. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1715
171619. Allow an empty sender to be matched against a lookup in an address list.
1717 Previously the only cases considered were a regular expression, or an
1718 empty pattern.
1719
172020. Exim went into a mad DNS lookup loop when doing a callout where the
1721 host was specified on the transport, if the DNS lookup yielded more than
1722 one IP address.
1723
ea3a6f44
NM
172421. The RFC2047 encoding function was originally intended for short strings
1725 such as real names; it was not keeping to the 75-character limit for
1726 encoded words that the RFC imposes. It now respects the limit, and
1727 generates multiple encoded words if necessary. To be on the safe side, I
1728 have increased the buffer size for the ${rfc2047: expansion operator from
1729 1024 to 2048 bytes.
bbe902f0 1730
ea3a6f44
NM
173122. Failure to deliver a bounce message always caused it to be frozen, even if
1732 there was an errors_to setting on the router. The errors_to setting is now
1733 respected.
bbe902f0
PH
1734
173523. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1736 canonical form (fully expanded) before being placed in
1737 $sender_host_address.
1738
173924. Updated eximstats to version 1.33
1740
ea3a6f44
NM
174125. Include certificate and key file names in error message when GnuTLS fails
1742 to set them up, because the GnuTLS error message doesn't include the name
1743 of the failing file when there is a problem reading it.
bbe902f0
PH
1744
174526. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1746 As per change 25.
bbe902f0 1747
ea3a6f44
NM
174827. Reset the locale to "C" after calling embedded Perl, in case it was changed
1749 (this can affect the format of dates).
bbe902f0 1750
ea3a6f44
NM
175128. exim_tidydb, when checking for the continued existence of a message for
1752 which it has found a message-specific retry record, was not finding
1753 messages that were in split spool directories. Consequently, it was
1754 deleting retry records that should have stayed in existence.
bbe902f0
PH
1755
175629. eximstats updated to version 1.35
1757 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1758 1.35 - bugfix such that pie charts by volume are generated correctly
1759
ea3a6f44
NM
176030. The SPA authentication driver was not abandoning authentication and moving
1761 on to the next authenticator when an expansion was forced to fail,
1762 contradicting the general specification for all authenticators. Instead it
1763 was generating a temporary error. It now behaves as specified.
bbe902f0 1764
ea3a6f44
NM
176531. The default ordering of permitted cipher suites for GnuTLS was pessimal
1766 (the order specifies the preference for clients). The order is now AES256,
1767 AES128, 3DES, ARCFOUR128.
bbe902f0 1768
ea3a6f44
NM
176931. Small patch to Sieve code - explicitly set From: when generating an
1770 autoreply.
bbe902f0 1771
ea3a6f44
NM
177232. Exim crashed if a remote delivery caused a very long error message to be
1773 recorded - for instance if somebody sent an entire SpamAssassin report back
1774 as a large number of 550 error lines. This bug was coincidentally fixed by
1775 increasing the size of one of Exim's internal buffers (big_buffer) that
1776 happened as part of the Exiscan merge. However, to be on the safe side, I
1777 have made the code more robust (and fixed the comments that describe what
1778 is going on).
bbe902f0 1779
ea3a6f44
NM
178033. Some experimental protocols are using DNS PTR records for new purposes. The
1781 keys for these records are domain names, not reversed IP addresses. The
1782 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1783 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1784 CAN-2005-0021
1785
ea3a6f44
NM
178634. The host_aton() function is supposed to be passed a string that is known
1787 to be a valid IP address. However, in the case of IPv6 addresses, it was
1788 not checking this. This is a hostage to fortune. Exim now panics and dies
1789 if the condition is not met. A case was found where this could be provoked
1790 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1791 components; fortuitously, this particular loophole had already been fixed
1792 by change 4.50/55 or 4.44/33 above.
1793
1794 If there are any other similar loopholes, the new check in host_aton()
1795 itself should stop them being exploited. The report I received stated that
1796 data on the command line could provoke the exploit when Exim was running as
1797 exim, but did not say which command line option was involved. All I could
1798 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1799 running as the user.
bbe902f0
PH
1800 CAN-2005-0021
1801
ea3a6f44
NM
180235. There was a buffer overflow vulnerability in the SPA authentication code
1803 (which came originally from the Samba project). I have added a test to the
1804 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1805 CAN-2005-0022
1806
ea3a6f44
NM
180736. The daemon start-up calls getloadavg() while still root for those OS that
1808 need the first call to be done as root, but it missed one case: when
1809 deliver_queue_load_max is set with deliver_drop_privilege. This is
1810 necessary for the benefit of the queue runner, because there is no re-exec
1811 when deliver_drop_privilege is set.
bbe902f0 1812
ea3a6f44
NM
181337. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1814 was in use, was not putting the data itself into the right store pool;
1815 consequently, it could be overwritten for a subsequent message in the same
1816 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1817 the caching.)
bbe902f0 1818
ea3a6f44
NM
181938. Sometimes the final signoff response after QUIT could fail to get
1820 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1821 < 0 before doing a fflush(). This bug looks as though it goes back to the
1822 introduction of TLS in release 3.20, but "sometimes" must have been rare
1823 because the tests only now provoked it.
bbe902f0
PH
1824
1825
495ae4b0
PH
1826Exim version 4.43
1827-----------------
1828
1829 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1830 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1831 Now it returns an integer. A number of calls were still expecting a T/F
1832 return. Fortuitously, in all cases, the tests worked in OK situations,
1833 which is the norm. However, things would have gone wrong on any write
1834 failures on the smtp file descriptor. This function is used when sending
1835 messages over SMTP and also when doing verify callouts.
1836
1837 2. When Exim is called to do synchronous delivery of a locally submitted
1838 message (the -odf or -odi options), it no longer closes stderr before doing
1839 the delivery.
1840
1841 3. Implemented the mua_wrapper option.
1842
1843 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1844
1845 5. Implemented the functions header_remove(), header_testname(),
1846 header_add_at_position(), and receive_remove_recipient(), and exported them
1847 to local_scan().
1848
1849 6. If an ACL "warn" statement specified the addition of headers, Exim already
1850 inserted X-ACL-Warn: at the start if there was no header name. However, it
1851 was not making this test for the second and subsequent header lines if
1852 there were newlines in the string. This meant that an invalid header could
1853 be inserted if Exim was badly configured.
1854
1855 7. Allow an ACL "warn" statement to add header lines at the start or after all
1856 the Received: headers, as well as at the end.
1857
1858 8. Added the rcpt_4xx retry error code.
1859
1860 9. Added postmaster_mailfrom=xxx to callout verification option.
1861
186210. Added mailfrom=xxxx to the callout verification option, for verify=
1863 header_sender only.
1864
186511. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1866 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1867
186812. Inserted some casts to stop certain compilers warning when using pointer
1869 differences as field lengths or precisions in printf-type calls (mostly
1870 affecting debugging statements).
1871
187213. Added optional readline() support for -be (dynamically loaded).
1873
187414. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1875 same clock tick as a message's arrival, so that its received time was the
1876 same as the "first fail" time on the retry record, and that message
1877 remained on the queue past the ultimate address timeout, every queue runner
1878 would try a delivery (because it was past the ultimate address timeout) but
1879 after another failure, the ultimate address timeout, which should have then
1880 bounced the address, did not kick in. This was a "< instead of <=" error;
1881 in most cases the first failure would have been in the next clock tick
1882 after the received time, and all would be well.
1883
188415. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1885 being recognized when the domain list was tested by the match_domain
1886 condition in an expansion string.
1887
188816. Added the ${str2b64: operator.
1889
189017. Exim was always calling setrlimit() to set a large limit for the number of
1891 processes, without checking whether the existing limit was already
1892 adequate. (It did check for the limit on file descriptors.) Furthermore,
1893 errors from getrlimit() and setrlimit() were being ignored. Now they are
1894 logged to the main and panic logs, but Exim does carry on, to try to do its
1895 job under whatever limits there are.
1896
189718. Imported PCRE 5.0.
1898
189919. Trivial typo in log message " temporarily refused connection" (the leading
1900 space).
1901
190220. If the log selector return_path_on_delivery was set and an address was
1903 redirected to /dev/null, the delivery process crashed because it assumed
1904 that a return path would always be set for a "successful" delivery. In this
1905 case, the whole delivery is bypassed as an optimization, and therefore no
1906 return path is set.
1907
190821. Internal re-arrangement: the function for sending a challenge and reading
1909 a response while authentication was assuming a zero-terminated challenge
1910 string. It's now changed to take a pointer and a length, to allow for
1911 binary data in such strings.
1912
191322. Added the cyrus_sasl authenticator (code supplied by MBM).
1914
191523. Exim was not respecting finduser_retries when seeking the login of the
1916 uid under which it was called; it was always trying 10 times. (The default
1917 setting of finduser_retries is zero.) Also, it was sleeping after the final
1918 failure, which is pointless.
1919
192024. Implemented tls_on_connect_ports.
1921
192225. Implemented acl_smtp_predata.
1923
192426. If the domain in control=submission is set empty, Exim assumes that the
1925 authenticated id is a complete email address when it generates From: or
1926 Sender: header lines.
1927
192827. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1929 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1930 chown and chgrp in /bin and hostname in /usr/bin.
1931
193228. Exim was keeping the "process log" file open after each use, just as it
1933 does for the main log. This opens the possibility of it remaining open for
1934 long periods when the USR1 signal hits a daemon. Occasional processlog
1935 errors were reported, that could have been caused by this. Anyway, it seems
1936 much more sensible not to leave this file open at all, so that is what now
1937 happens.
1938
193929. The long-running daemon process does not normally write to the log once it
1940 has entered its main loop, and it closes the log before doing so. This is
1941 so that log files can straightforwardly be renamed and moved. However,
1942 there are a couple of unusual error situations where the daemon does write
1943 log entries, and I had neglected to close the log afterwards.
1944
194530. The text of an SMTP error response that was received during a remote
1946 delivery was being truncated at 512 bytes. This is too short for some of
1947 the long messages that one sometimes sees. I've increased the limit to
1948 1024.
1949
195031. It is now possible to make retry rules that apply only when a message has a
1951 specific sender, in particular, an empty sender.
1952
195332. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1954 it possible to be selective about when SMTP synchronization is enforced.
1955
195633. Added "control = caseful_local_part" and "control = "caselower_local_part".
1957
195832. Implemented hosts_connection_nolog.
1959
196033. Added an ACL for QUIT.
1961
196234. Setting "delay_warning=" to disable warnings was not working; it gave a
1963 syntax error.
1964
196535. Added mailbox_size and mailbox_filecount to appendfile.
1966
196736. Added control = no_multiline_responses to ACLs.
1968
196937. There was a bug in the logic of the code that waits for the clock to tick
1970 in the case where the clock went backwards by a substantial amount such
1971 that the microsecond fraction of "now" was more than the microsecond
1972 fraction of "then" (but the whole seconds number was less).
1973
197438. Added support for the libradius Radius client library this is found on
1975 FreeBSD (previously only the radiusclient library was supported).
1976
1977
1978Exim version 4.42
1979-----------------
1980
1981 1. When certain lookups returned multiple values in the form name=value, the
1982 quoting of the values was not always being done properly. Specifically:
1983 (a) If the value started with a double quote, but contained no whitespace,
1984 it was not quoted.
1985 (b) If the value contained whitespace other than a space character (i.e.
1986 tabs or newlines or carriage returns) it was not quoted.
1987 This fix has been applied to the mysql and pgsql lookups by writing a
1988 separate quoting function and calling it from the lookup code. The fix
1989 should probably also be applied to nisplus, ibase and oracle lookups, but
1990 since I cannot test any of those, I have not disturbed their existing code.
1991
1992 2. A hit in the callout cache for a specific address caused a log line with no
1993 reason for rejecting RCPT. Now it says "Previous (cached) callout
1994 verification failure".
1995
1996 3. There was an off-by-one bug in the queryprogram router. An over-long
1997 return line was truncated at 256 instead of 255 characters, thereby
1998 overflowing its buffer with the terminating zero. As well as fixing this, I
1999 have increased the buffer size to 1024 (and made a note to document this).
2000
2001 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2002 when Exim is waiting for an SMTP response from a remote server, Exim
2003 restarts its select() call on the socket, thereby resetting its timeout.
2004 This is not a problem when such interrupts are rare. Somebody set up a cron
2005 job to run exiwhat every 2 minutes, which is less than the normal select()
2006 timeout (5 or 10 minutes). This meant that the select() timeout never
2007 kicked in because it was always reset. I have fixed this by comparing the
2008 time when an interrupt arrives with the time at the start of the first call
2009 to select(). If more time than the timeout has elapsed, the interrupt is
2010 treated as a timeout.
2011
2012 5. Some internal re-factoring in preparation for the addition of Sieve
2013 extensions (by MH). In particular, the "personal" test is moved to a
2014 separate function, and given an option for scanning Cc: and Bcc: (which is
2015 not set for Exim filters).
2016
2017 6. When Exim created an email address using the login of the caller as the
2018 local part (e.g. when creating a From: or Sender: header line), it was not
2019 quoting the local part when it contained special characters such as @.
2020
2021 7. Installed new OpenBSD configuration files.
2022
2023 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2024 try to make them clearer.
2025
2026 9. Callout options, other than the timeout value, were being ignored when
2027 verifying sender addresses in header lines. For example, when using
2028
2029 verify = header_sender/callout=no_cache
2030
2031 the cache was (incorrectly) being used.
2032
203310. Added a missing instance of ${EXE} to the exim_install script; this affects
2034 only the Cygwin environment.
2035
203611. When return_path_on_delivery was set as a log selector, if different remote
2037 addresses in the same message used different return paths and parallel
2038 remote delivery occurred, the wrong values would sometimes be logged.
2039 (Whenever a remote delivery process finished, the return path value from
2040 the most recently started remote delivery process was logged.)
2041
204212. RFC 3848 specifies standard names for the "with" phrase in Received: header
2043 lines when AUTH and/or TLS are in use. This is the "received protocol"
2044 field. Exim used to use "asmtp" for authenticated SMTP, without any
2045 indication (in the protocol name) for TLS use. Now it follows the RFC and
2046 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2047 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2048 names appear in log lines as well as in Received: header lines.
2049
205013. Installed MH's patches for Sieve to add the "copy" and "vacation"
2051 extensions, and comparison tests, and to fix some bugs.
2052
205314. Changes to the "personal" filter test:
2054
2055 (1) The test was buggy in that it was just doing the equivalent of
2056 "contains" tests on header lines. For example, if a user's address was
2057 anne@some.where, the "personal" test would incorrectly be true for
2058
2059 To: susanne@some.where
2060
2061 This test is now done by extracting each address from the header in turn,
2062 and checking the entire address. Other tests that are part of "personal"
2063 are now done using regular expressions (for example, to check local parts
2064 of addresses in From: header lines).
2065
2066 (2) The list of non-personal local parts in From: addresses has been
2067 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2068 taken from the Sieve specification recommendations.
2069
2070 (3) If the message contains any header line starting with "List-" it is
2071 treated as non-personal.
2072
2073 (4) The test for "circular" in the Subject: header line has been removed
2074 because it now seems ill-conceived.
2075
207615. Minor typos in src/EDITME comments corrected.
2077
207816. Installed latest exipick from John Jetmore.
2079
208017. If headers_add on a router specified a text string that was too long for
2081 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2082 of string_sprintf() is now avoided.
2083
208418. $message_body_size was not set (it was always zero) when running the DATA
2085 ACL and the local_scan() function.
2086
208719. For the "mail" command in an Exim filter, no default was being set for
2088 the once_repeat time, causing a random time value to be used if "once" was
2089 specified. (If the value happened to be <= 0, no repeat happened.) The
2090 default is now 0s, meaning "never repeat". The "vacation" command was OK
2091 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2092 (I found it when inspecting the code).
2093
209420. There is now an overall timeout for performing a callout verification. It
2095 defaults to 4 times the callout timeout, which applies to individual SMTP
2096 commands during the callout. The overall timeout applies when there is more
2097 than one host that can be tried. The timeout is checked before trying the
2098 next host. This prevents very long delays if there are a large number of
2099 hosts and all are timing out (e.g. when the network connections are timing
2100 out). The value of the overall timeout can be changed by specifying an
2101 additional sub-option for "callout", called "maxwait". For example:
2102
2103 verify = sender/callout=5s,maxwait=20s
2104
210521. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2106 to the end before writing, but this should make it even safer).
2107
210822. Exim was forgetting that it had advertised PIPELINING for the second and
2109 subsequent messages on an SMTP connection. It was also not resetting its
2110 memory on STARTTLS and an internal HELO.
2111
211223. When Exim logs an SMTP synchronization error within a session, it now
2113 records whether PIPELINING has been advertised or not.
2114
211524. Added 3 instances of "(long int)" casts to time_t variables that were being
2116 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2117 rather than long int.
2118
211925. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2120
212126. Added the never_mail option to autoreply.
2122
2123
2124Exim version 4.41
2125-----------------
2126
2127 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2128 crash if the getsockname() call failed; this can happen if a connection is
2129 closed very soon after it is established. The problem was simply in the
2130 order in which certain operations were done, causing Exim to try to write
2131 to the SMTP stream before it had set up the file descriptor. The bug has
2132 been fixed by making things happen in the correct order.
2133
2134
2135Exim version 4.40
2136-----------------
2137
2138 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2139 before the connection was closed, thus losing the rejection response.
2140
2141 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2142 some early Solaris releases, but causes trouble in current releases where
2143 socklen_t is defined.
2144
2145 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2146 always exist.
2147
2148 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2149 configured.
2150
2151 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2152 that releasing the top of it at the end releases what was used for sub-
2153 expansions (unless the block got too big). However, discard this block if
2154 the first thing is a variable or header, so that we can use its block when
2155 it is dynamic (useful for very large $message_headers, for example).
2156
2157 6. Lookups now cache *every* query, not just the most recent. A new, separate
2158 store pool is used for this. It can be recovered when all lookup caches are
2159 flushed. Lookups now release memory at the end of their result strings.
2160 This has involved some general refactoring of the lookup sources.
2161
2162 7. Some code has been added to the store_xxx() functions to reduce the amount
2163 of flapping under certain conditions.
2164
2165 8. log_incoming_interface used to affect only the <= reception log lines. Now
2166 it causes the local interface and port to be added to several more SMTP log
2167 lines, for example "SMTP connection from", and rejection lines.
2168
2169 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2170
217110. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2172
217311. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2174 could be overwritten at the end of the current message (or the start of a
2175 new message if it was set in a HELO ACL). The value is now preserved for
2176 the duration of the SMTP connection.
2177
217812. If a transport had a headers_rewrite setting, and a matching header line
2179 contained an unqualified address, that address was qualified, even if it
2180 did not match any rewriting rules. The underlying bug was that the values
2181 of the flags that permit the existence of unqualified sender and recipient
2182 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2183 non-local messages, and by -bnq for local messages) were not being
2184 preserved with the message after it was received.
2185
218613. When Exim was logging an SMTP synchronization error, it could sometimes log
2187 "next input=" as part of the text comprising the host identity instead of
2188 the correct text. The code was using the same buffer for two different
2189 strings. However, depending on which order the printing function evaluated
2190 its arguments, the bug did not always show up. Under Linux, for example, my
2191 test suite worked just fine.
2192
219314. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2194 doesn't work with some older versions of Perl. It has been changed to "my",
2195 which in any case is probably the better facility to use.
2196
219715. A really picky compiler found some instances of statements for creating
2198 error messages that either had too many or two few arguments for the format
2199 string.
2200
220116. The size of the buffer for calls to the DNS resolver has been increased
2202 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2203 for addresses that have a lot of PTR records. This alleviates a problem; it
2204 does not fully solve it.
2205
220617. A dnsdb lookup for PTR records that receives more data than will fit in the
2207 buffer now truncates the list and logs the incident, which is the same
2208 action as happens when Exim is looking up a host name and its aliases.
2209 Previously in this situation something unpredictable would happen;
2210 sometimes it was "internal error: store_reset failed".
2211
221218. If a server dropped the connection unexpectedly when an Exim client was
2213 using GnuTLS and trying to read a response, the client delivery process
2214 crashed while trying to generate an error log message.
2215
221619. If a "warn" verb in an ACL added multiple headers to a message in a single
2217 string, for example:
2218
2219 warn message = H1: something\nH2: something
2220
2221 the text was added as a single header line from Exim's point of view
2222 though it ended up OK in the delivered message. However, searching for the
2223 second and subsequent header lines using $h_h2: did not work. This has been
2224 fixed. Similarly, if a system filter added multiple headers in this way,
2225 the routers could not see them.
2226
222720. Expanded the error message when iplsearch is called with an invalid key to
2228 suggest using net-iplsearch in a host list.
2229
223021. When running tests using -bh, any delays imposed by "delay" modifiers in
2231 ACLs are no longer actually imposed (and a message to that effect is
2232 output).
2233
223422. If a "gecos" field in a passwd entry contained escaped characters, in
2235 particular, if it contained a \" sequence, Exim got it wrong when building
2236 a From: or a Sender: header from that name. A second bug also caused
2237 incorrect handling when an unquoted " was present following a character
2238 that needed quoting.
2239
224023. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2241 was not being matched caselessly.
2242
224324. Arranged for all hyphens in the exim.8 source to be escaped with
2244 backslashes.
2245
224625. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2247 properly. Recipient callout cache records were still being keyed to include
2248 the sender, even when use_sender was set false. This led to far more
2249 callouts that were necessary. The sender is no longer included in the key
2250 when use_sender is false.
2251
225226. Added "control = submission" modifier to ACLs.
2253
225427. Added the ${base62d: operator to decode base 62 numbers.
2255
225628. dnsdb lookups can now access SRV records.
2257
225829. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2259 the configuration file.
2260
226130. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2262 (-v) mode. This makes the output for a verbose queue run more intelligible.
2263
226431. Added a use_postmaster feature to recipient callouts.
2265
226632. Added the $body_zerocount variable, containing the number of binary zero
2267 bytes in the message body.
2268
226933. The time of last modification of the "new" subdirectory is now used as the
2270 "mailbox time last read" when there is a quota error for a maildir
2271 delivery.
2272
227334. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2274
227535. Added +ignore_unknown as a special item in host lists.
2276
227736. Code for decoding IPv6 addresses in host lists is now included, even if
2278 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2279 address was recognized as an IP address, but was then not correctly decoded
2280 into binary, causing unexpected and incorrect effects when compared with
2281 another IP address.
2282
2283
2284Exim version 4.34
2285-----------------
2286
2287 1. Very minor rewording of debugging text in manualroute to say "list of
2288 hosts" instead of "hostlist".
2289
2290 2. If verify=header_syntax was set, and a header line with an unqualified
2291 address (no domain) and a large number of spaces between the end of the
2292 name and the colon was received, the reception process suffered a buffer
2293 overflow, and (when I tested it) crashed. This was caused by some obsolete
2294 code that should have been removed. The fix is to remove it!
2295
2296 3. When running in the test harness, delay a bit after writing a bounce
2297 message to get a bit more predictability in the log output.
2298
2299 4. Added a call to search_tidyup() just before forking a reception process. In
2300 theory, someone could use a lookup in the expansion of smtp_accept_max_
2301 per_host which, without the tidyup, could leave open a database connection.
2302
2303 5. Added the variables $recipient_data and $sender_data which get set from a
2304 lookup success in an ACL "recipients" or "senders" condition, or a router
2305 "senders" option, similar to $domain_data and $local_part_data.
2306
2307 6. Moved the writing of debug_print from before to after the "senders" test
2308 for routers.
2309
2310 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2311 problems for message scanning, either using a data ACL, or using
2312 local_scan() because the Received: header was not generated till after they
2313 were called (in order to set the time as the time of reception completion).
2314 I have revised the way this works. The header is now generated after the
2315 body is received, but before the ACL or local_scan() are called. After they
2316 are run, the timestamp in the header is updated.
2317
2318
2319Exim version 4.33
2320-----------------
2321
2322 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2323 before starting a queue runner without re-exec. This happened only when
2324 deliver_drop_privilege was set or when the Exim user was set to root. The
2325 effect of the bug was that timeouts during subsequent deliveries caused
2326 crashes instead of being properly handled. The handler is now left at its
2327 default (and expected) setting.
2328
2329 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2330 message, again when deliver_drop_privilege is set or Exim is run as root.
2331 The bug described in (1) was not present in this case, but the tidying up
2332 of the other signals was missing. I have made the two cases consistent.
2333
2334 3. The ignore_target_hosts setting on a manualroute router was being ignored
2335 for hosts that were looked up using the /MX notation.
2336
2337 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2338 in domain lists.
2339
2340 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2341 operated on the sender address. After changing the $sender_address to <>
2342 for the sender address verify, Exim was re-instated it as the original
2343 (before rewriting) address, but remembering that it had rewritten it, so it
2344 wasn't rewriting it again. This bug also had the effect of breaking the
2345 sender address verification caching when the sender address was rewritten.
2346
2347 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2348 This has been changed so that if the ip literal address matches
2349 ignore_target_hosts, the router declines.
2350
2351 7. Added expansion conditions match_domain, match_address, and match_local_
2352 part (NOT match_host).
2353
2354 8. The placeholder for the Received: header didn't have a length field set.
2355
2356 9. Added code to Exim itself and to exim_lock to test for a specific race
2357 condition that could lead to file corruption when using MBX delivery. The
2358 issue is with the lockfile that is created in /tmp. If this file is removed
2359 after a process has opened it but before that process has acquired a lock,
2360 there is the potential for a second process to recreate the file and also
2361 acquire a lock. This could lead to two Exim processes writing to the file
2362 at the same time. The added code performs the same test as UW imapd; it
2363 checks after acquiring the lock that its file descriptor still refers to
2364 the same named file.
2365
236610. The buffer for building added header lines was of fixed size, 8192 bytes.
2367 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2368 when Exim is built.
2369
237011. Added the smtp_active_hostname option. If used, this will typically be made
2371 to depend on the incoming interface address. Because $interface_address is
2372 not set up until the daemon has forked a reception process, error responses
2373 that can happen earlier (such as "too many connections") no longer contain
2374 a host name.
2375
237612. If an expansion in a condition on a "warn" statement fails because a lookup
2377 defers, the "warn" statement is abandoned, and the next ACL statement is
2378 processed. Previously this caused the whole ACL to be aborted.
2379
238013. Added the iplsearch lookup type.
2381
238214. Added ident_timeout as a log selector.
2383
238415. Added tls_certificate_verified as a log selector.
2385
238616. Added a global option tls_require_ciphers (compare the smtp transport
2387 option of the same name). This controls incoming TLS connections.
2388
238917. I finally figured out how to make tls_require_ciphers do a similar thing
2390 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2391 before starting the TLS session.
2392
239318. Tabs are now shown as \t in -bP output.
2394
239519. If the log selector return_path_on_delivery was set, Exim crashed when
2396 bouncing a message because it had too many Received: header lines.
2397
239820. If two routers both had headers_remove settings, and the first one included
2399 a superfluous trailing colon, the final name in the first list and the
2400 first name in the second list were incorrectly joined into one item (with a
2401 colon in the middle).
2402
2403
2404Exim version 4.32
2405-----------------
2406
2407 1. Added -C and -D options to the exinext utility, mainly to make it easier
2408 to include in the automated testing, but these could be helpful when
2409 multiple configurations are in use.
2410
2411 2. The exinext utility was not formatting the output nicely when there was
2412 an alternate port involved in the retry record key, nor when there was a
2413 message id as well (for retries that were specific to a specific message
2414 and a specific host). It was also confused by IPv6 addresses, because of
2415 the additional colons they contain. I have fixed the IPv4 problem, and
2416 patched it up to do a reasonable job for IPv6.
2417
2418 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2419 delivery, the log line now contains "pipelined" if PIPELINING was used.
2420
2421 4. An SMTP transport process used to panic and die if the bind() call to set
2422 an explicit outgoing interface failed. This has been changed; it is now
2423 treated in the same way as a connect() failure.
2424
2425 5. A reference to $sender_host_name in the part of a conditional expansion
2426 that was being skipped was still causing a DNS lookup. This no longer
2427 occurs.
2428
2429 6. The def: expansion condition was not recognizing references to header lines
2430 that used bh_ and bheader_.
2431
2432 7. Added the _cache feature to named lists.
2433
2434 8. The code for checking quota_filecount in the appendfile transport was
2435 allowing one more file than it should have been.
2436
2437 9. For compatibility with Sendmail, the command line option
2438
2439 -prval:sval
2440
2441 is equivalent to
2442
2443 -oMr rval -oMs sval
2444
2445 and sets the incoming protocol and host name (for trusted callers). The
2446 host name and its colon can be omitted when only the protocol is to be set.
2447 Note the Exim already has two private options, -pd and -ps, that refer to
2448 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2449 "s", but I don't think that's a major issue.
2450
245110. A number of refactoring changes to the code, none of which should affect
2452 Exim's behaviour:
2453
2454 (a) The number of logging options was getting close to filling up the
2455 32-bit word that was used as a bit map. I have split them into two classes:
2456 those that are passed in the argument to log_write(), and those that are
2457 only ever tested independently outside of that function. These are now in
2458 separate 32-bit words, so there is plenty of room for expansion again.
2459 There is no change in the user interface or the logging behaviour.
2460
2461 (b) When building, for example, log lines, the code previously used a
2462 macro that called string_cat() twice, in order to add two strings. This is
2463 not really sufficiently general. Furthermore, there was one instance where
2464 it was actually wrong because one of the argument was used twice, and in
2465 one call a function was used. (As it happened, calling the function twice
2466 did not affect the overall behaviour.) The macro has been replaced by a
2467 function that can join an arbitrary number of extra strings onto a growing
2468 string.
2469
2470 (c) The code for expansion conditions now uses a table and a binary chop
2471 instead of a serial search (which was left over from when there were very
2472 few conditions). Also, it now recognizes conditions like "pam" even when
2473 the relevant support is not compiled in: a suitably worded error message is
2474 given if an attempt is made to use such a condition.
2475
247611. Added ${time_interval:xxxxx}.
2477
247812. A bug was causing one of the ddress fields not to be passed back correctly
2479 from remote delivery subprocesses. The field in question was not being
2480 subsequently used, so this caused to problems in practice.
2481
248213. Added new log selectors queue_time and deliver_time.
2483
248414. Might have fixed a bug in maildirsizefile handling that threw up
2485 "unexpected character" debug warnings, and recalculated the data
2486 unnecessarily. In any case, I expanded the warning message to give more
2487 information.
2488
248915. Added the message "Restricted characters in address" to the statements in
2490 the default ACL that block characters like @ and % in local parts.
2491
249216. Change 71 for release 4.31 proved to be much less benign that I imagined.
2493 Three changes have been made:
2494
2495 (a) There was a serious bug; a negative response to MAIL caused the whole
2496 recipient domain to be cached as invalid, thereby blocking all messages
2497 to all local parts at the same domain, from all senders. This bug has
2498 been fixed. The domain is no longer cached after a negative response to
2499 MAIL if the sender used is not empty.
2500
2501 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2502 been restored.
2503
2504 (c) A new callout option, "use_sender" has been added for people who want
2505 the modified behaviour.
2506
2507
2508Exim version 4.31
2509-----------------
2510
2511 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2512 Larry Rosenman.
2513
2514 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2515 indeed breaks things for older releases.
2516
2517 3. Added additional logging to the case where there is a problem reading data
2518 from a filter that is running in a subprocess using a pipe, in order to
2519 try to track down a specific problem.
2520
2521 4. Testing facility fudge: when running in the test harness and attempting
2522 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2523 getting "No route to host". Convert this to a timeout.
2524
2525 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2526 warning.
2527
2528 6. Some OS don't have socklen_t but use size_t instead. This affects the
2529 fifth argument of getsockopt() amongst other things. This is now
2530 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2531 can be set for individual OS. I have set it for SunOS5, OSF1, and
2532 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2533 some earlier ones do not.
2534
2535 7. Change 4.30/15 was not doing the test caselessly.
2536
2537 8. The standard form for an IPv6 address literal was being rejected by address
2538 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2539 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2540 this, as well as the form without the "IPv6" on the front (but only when
2541 address literals are enabled, of course).
2542
2543 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2544
254510. Exim crashed if a message with an empty sender address specified by -f
2546 encountered a router with an errors_to setting. This could be provoked only
2547 by a command such as
2548
2549 exim -f "" ...
2550
2551 where an empty string was supplied; "<>" did not hit this bug.
2552
255311. Installed PCRE release 4.5.
2554
255512. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2556 remained set. It is now erased.
2557
255813. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2559 times from message ids (which are base 36 rather than the normal 62).
2560
256114. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2562 were being counted as actual protocol errors, and logged if the log
2563 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2564 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2565 and DATA following a set of rejected RCPTs do not count as protocol errors.
2566 In other words, Exim assumes they were pipelined, though this may not
2567 actually be the case. Of course, in all cases the client gets an
2568 appropriate error code.
2569
257015. If a lookup fails in an ACL condition, a message about the failure may
2571 be available; it is used if testing the ACL cannot continue, because most
2572 such messages specify what the cause of the deferral is. However, some
2573 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2574 that caused an old message to be retained and used if a later statement
2575 caused a defer, replacing the real cause of the deferral.
2576
257716. If an IP address had so many PTR records that the DNS lookup buffer
2578 was not large enough to hold them, Exim could crash while trying to process
2579 the truncated data. It now detects and logs this case.
2580
258117. Further to 4.21/58, another change has been made: if (and only if) the
2582 first line of a message (the first header line) ends with CRLF, a bare LF
2583 in a subsequent header line has a space inserted after it, so as not to
2584 terminate the header.
2585
258618. Refactoring: tidied an ugly bit of code in appendfile that copied data
2587 unnecessarily, used atoi() instead of strtol(), and didn't check the
2588 termination when getting file sizes from file names by regex.
2589
259019. Completely re-implemented the support for maildirsize files, in the light
2591 of a number of problems with the previous contributed implementation
2592 (4.30/29). In particular:
2593
2594 . If the quota is zero, the maildirsize file is maintained, but no quota is
2595 imposed.
2596
2597 . If the maildir directory does not exist, it is created before any attempt
2598 to write a maildirsize file.
2599
2600 . The quota value in the file is just a cache; if the quota is changed in
2601 the transport, the new value overrides.
2602
2603 . A regular expression is available for excluding directories from the
2604 count.
2605
260620. The autoreply transport checks the characters in options that define the
2607 message's headers; it allows continued headers, but it was checking with
2608 isspace() after an embedded newline instead of explicitly looking for a
2609 space or a tab.
2610
261121. If all the "regular" hosts to which an address was routed had passed their
2612 expiry times, and had not reached their retry times, the address was
2613 bounced, even if fallback hosts were defined. Now Exim should go on to try
2614 the fallback hosts.
2615
261622. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2617 equivalent code in the SMTP transport. Some hosts send humungous responses
2618 to HELO/EHLO, more than 1024 it seems.
2619
262023. Refactoring: code in filter.c used (void *) for "any old type" but this
2621 gives compiler warnings in some environments. I've now done it "properly",
2622 using a union.
2623
262424. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2625 (because of problems with the built-in one) was declared to return uschar *
2626 instead of char *, causing compiler failure.
2627
262825. Fixed a file descriptor leak when processing alias/forward files.
2629
263026. Fixed a minor format string issue in dbfn.c.
2631
263227. Typo in exim.c: ("dmbnz" for "dbmnz").
2633
263428. If a filter file refered to $h_xxx or $message_headers, and the headers
2635 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2636 become corrupted.
2637
263829. When a sender address is verified, it is cached, to save repeating the test
2639 when there is more than one recipient in a message. However, when the
2640 verification involves a callout, it is possible for different callout
2641 options to be set for different recipients. It is too complicated to keep
2642 track of this in the cache, so now Exim always runs a verification when a
2643 callout is required, relying on the callout cache for the optimization.
2644 The overhead is duplication of the address routing, but this should not be
2645 too great.
2646
264730. Fixed a bug in callout caching. If a RCPT command caused the sender address
2648 to be verified with callout=postmaster, and the main callout worked but the
2649 postmaster check failed, the verification correctly failed. However, if a
2650 subsequent RCPT command asked for sender verification *without* the
2651 postmaster check, incorrect caching caused this verification also to fail,
2652 incorrectly.
2653
265431. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2655 it was not caching the DNS options (qualify_single, search_parents) that
2656 were used when the lookup failed. A subsequent lookup with different
2657 options therefore always gave the same answer, though there were cases
2658 where it should not have. (Example: a "domains = !$mx_any" option on a
2659 dnslookup router: the "domains" option is always processed without any
2660 widening, but the router might have qualify_single set.) Now Exim uses the
2661 cached value only when the same options are set.
2662
266332. Added John Jetmore's "exipick" utility to the distribution.
2664
266533. GnuTLS: When an attempt to start a TLS session fails for any reason other
2666 than a timeout (e.g. a certificate is required, and is not provided), an
2667 Exim server now closes the connection immediately. Previously it waited for
2668 the client to close - but if the client is SSL, it seems that they each
2669 wait for each other, leading to a delay before one of them times out.
2670
267134: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2672 maintained 0.8.x compatibility because I don't think many are using it, and
2673 it is clearly obsolete.
2674
267535. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2676 transport.
2677
267836. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2679 client certificate was expired. A simple patch fixes this, though I don't
2680 understand the full logic of why the verify callback is called multiple
2681 times.
2682
268337. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2684 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2685 which causes problems with some clients (such as the Certicom SSL Plus
2686 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2687 disables the coutermeasure allowing Eudora to connect."
2688
268938. Exim was not checking that a write() to a log file succeeded. This could
2690 lead to Bad Things if a log got too big, in particular if it hit a file
2691 size limit. Exim now panics and dies if it cannot write to a log file, just
2692 as it does if it cannot open a log file.
2693
269439. Modified OS/Makefile-Linux so that it now contains
2695
2696 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2697
2698 The two -D definitions ensure that Exim is compiled with large file
2699 support, which makes it possible to handle log files that are bigger than
2700 2^31.
2701
270240. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2703 instance) a domain was checked against a named list that involved a lookup,
2704 causing $domain_data to be set, then another domain was checked against the
2705 same list, then the first domain was re-checked, the value of $domain_data
2706 after the final check could be wrong. In particular, if the second check
2707 failed, it could be set empty. This bug probably also applied to
2708 $localpart_data.
2709
271041. The strip_trailing_dot option was not being applied to the address given
2711 with the -f command-line option.
2712
271342. The code for reading a message's header from the spool was incrementing
2714 $received_count, but never initializing it. This meant that the value was
2715 incorrect (doubled) while delivering a message in the same process in which
2716 it was received. In the most common configuration of Exim, this never
2717 happens - a fresh exec is done - but it can happen when
2718 deliver_drop_privilege is set.
2719
272043. When Exim logs an SMTP synchronization error - client data sent too soon -
2721 it now includes up to 150 characters of the unexpected data in the log
2722 line.
2723
272444. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2725 and building data strings. The size of both of these buffers was 10 000
2726 bytes - far larger than anybody would *ever* want, thought I. Needless to
2727 say, somebody hit the limit. I have increased the maximum line length to
2728 20 000 and the maximum data length of concatenated lines to 100 000. I have
2729 also fixed two bugs, because there was no checking on these buffers. Tsk,
2730 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2731 buffer is too small.
2732
273345. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2734 lsearch lookups. Now it does.
2735
273646. When parsing a route_list item in a manualroute router, a fixed-length
2737 buffer was used for the list of hosts. I made this 1024 bytes long,
2738 thinking that nobody would ever have a list of hosts that long. Wrong.
2739 Somebody had a whole pile of complicated expansion conditions, and the
2740 string was silently truncated, leading to an expansion error. It turns out
2741 that it is easier to change to an unlimited length (owing to other changes
2742 that have happened since this code was originally written) than to build
2743 structure for giving a limitation error. The length of the item that
2744 expands into the list of hosts is now unlimited.
2745
274647. The lsearch lookup could not handle data where the length of text line was
2747 more than 4095 characters. Such lines were truncated, leading to shortened
2748 data being returned. It should now handle lines of any length.
2749
275048. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2751 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2752 ACL").
2753
275449. Cosmetic tidy to scripts like exicyclog that are generated by globally
2755 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2756 no longer happens in comment lines. A list of replacements is now placed
2757 at the head of all of the source files, except those whose only change is
2758 to replace PERL_COMMAND in the very first #! line.
2759
276050. Replaced the slow insertion sort in queue.c, for sorting the list of
2761 messages on the queue, with a bottom-up merge sort, using code contributed
2762 by Michael Haardt. This should make operations like -bp somewhat faster on
2763 large queues. It won't affect queue runners, except when queue_run_in_order
2764 is set.
2765
276651. Installed eximstats 1.31 in the distribution.
2767
276852. Added support for SRV lookups to the dnslookup router.
2769
277053. If an ACL referred to $message_body or $message_body_end, the value was not
2771 reset for any messages that followed in the same SMTP session.
2772
277354. The store-handling optimization for building very long strings was not
2774 differentiating between the different store pools. I don't think this
2775 actually made any difference in practice, but I've tidied it.
2776
277755. While running the routers to verify a sender address, $sender_address
2778 was still set to the sender address. This is wrong, because when routing to
2779 send a bounce to the sender, it would be empty. Therefore, I have changed
2780 it so that, while verifying a sender address, $sender_address is set to <>.
2781 (There is no change to what happens when verifying a recipient address.)
2782
278356. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2784 target A or AAAA records (if not already returned) without resetting the
2785 qualify_single or search_parents options of the DNS resolver. These are
2786 inappropriate in this case because the targets of MX and SRV records must
2787 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2788 target that, when qualified, matched something in the local domain. These
2789 two options are now turned off when doing these lookups.
2790
279157. It seems that at least some releases of Reiserfs (which does not have the
2792 concept of a fixed number of inodes) returns zero and not -1 for the
2793 number of available inodes. This interacted badly with check_spool_inodes,
2794 which assumed that -1 was the "no such thing" setting. What I have done is
2795 to check that the total number of inodes is greater than zero before doing
2796 the test of how many are available.
2797
279858. When a "warn" ACL statement has a log_message modifier, the message is
2799 remembered, and not repeated. This is to avoid a lot of repetition when a
2800 message has many recipients that cause the same warning to be written.
2801 Howewer, Exim was preserving the list of already written lines for an
2802 entire SMTP session, which doesn't seem right. The memory is now reset if a
2803 new message is started.
2804
280559. The "rewrite" debugging flag was not showing the result of rewriting in the
2806 debugging output unless log_rewrite was also set.
2807
280860. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2809 of (int)(handle) when we know that handle contains (void *)(-1).
2810
281161. The Exim daemon panic-logs an error return when it closes the incoming
2812 connection. However "connection reset by peer" seems to be common, and
2813 isn't really an error worthy of noting specially, so that particular error
2814 is no long logged.
2815
281662. When Exim is trying to find all the local interfaces, it used to panic and
2817 die if the ioctl to get the interface flags failed. However, it seems that
2818 on at least one OS (Solaris 9) it is possible to have an interface that is
2819 included in the list of interfaces, but for which you get a failure error
2820 for this call. This happens when the interface is not "plumbed" into a
2821 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2822 failure of the "get flags" call assumes that the interface is down.
2823
282463. Added a ${eval10: operator, which assumes all numbers are decimal. This
2825 makes life easier for people who are doing arithmetic on fields extracted
2826 from dates, where you often get leading zeros that should not be
2827 interpreted as octal.
2828
282964. Added qualify_domain to the redirect router, to override the global
2830 setting.
2831
283265. If a pathologically long header line contained very many addresses (the
2833 report of this problem mentioned 10 000) and each of them was rewritten,
2834 Exim could use up a very large amount of memory. (It kept on making new
2835 copies of the header line as it rewrote, and never released the old ones.)
2836 At the expense of a bit more processing, the header rewriting function has
2837 been changed so that it no longer eats memory in this way.
2838
283966. The generation of the Received: header has been moved from the time that a
2840 message starts to be received, to the time that it finishes. The timestamp
2841 in the Received: header should now be very close to that of the <= log
2842 line. There are two side-effects of this change:
2843
2844 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2845 logged header lines no longer include the local Received: line, because
2846 it has not yet been created. The same applies to a copy of the message
2847 that is returned to a non-SMTP sender when a message is rejected.
2848
2849 (b) When a filter file is tested using -bf, no additional Received: header
2850 is added to the test message. After some thought, I decided that this
2851 is a bug fix.
2852
2853 This change does not affect the value of $received_for. It is still set
2854 after address rewriting, but before local_scan() is called.
2855
285667. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2857
285868. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2859 gave an unhelpful panic error message, and a defer error. I have managed to
2860 change this behaviour so that it now rejects any supplied certificate,
2861 which seems right, as the list of acceptable certificates is empty.
2862
286369. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2864 gave an unhelpful defer error. I have not managed to make this reject any
2865 supplied certificates, but the error message it gives is "no certificate
2866 supplied", which is not helpful.
2867
286870. exigrep's output now also includes lines that are not associated with any
2869 message, but which match the given pattern. Implemented by a patch from
2870 Martin Sluka, which also tidied up the Perl a bit.
2871
287271. Recipient callout verification, like sender verification, was using <> in
2873 the MAIL FROM command. This isn't really the right thing, since the actual
2874 sender may affect whether the remote host accepts the recipient or not. I
2875 have changed it to use the actual sender in the callout; this means that
2876 the cache record is now keyed on a recipient/sender pair, not just the
2877 recipient address. There doesn't seem to be a real danger of callout loops,
2878 since a callout by the remote host to check the sender would use <>.
2879 [SEE ABOVE: changed after hitting problems.]
2880
288172. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2882 temporary errors. However, in the case of such a code being given after
2883 the end of a data transmission (i.e. after ".") Exim was failing to write
2884 a retry record for the message. (Yes, there was some broken host that was
2885 actually sending 8xx at this point.)
2886
288773. An unknown lookup type in a host list could cause Exim to panic-die when
2888 the list was checked. (An example that provoked this was putting <; in the
2889 middle of a list instead of at the start.) If this happened during a DATA
2890 ACL check, a -D file could be left lying around. This kind of configuration
2891 error no longer causes Exim to die; instead it causes a defer errror. The
2892 incident is still logged to the main and panic logs.
2893
289474. Buglet left over from Exim 3 conversion. The message "too many messages
2895 in one connection" was written to the rejectlog but not the mainlog, except
2896 when address rewriting (yes!) was being logged.
2897
289875. Added write_rejectlog option.
2899
290076. When a system filter was run not as root (that is, when system_filter_user
2901 was set), the values of the $n variables were not being returned to the
2902 main process; thus, they were not subsequently available in the $sn
2903 variables.
2904
290577. Added +return_path_on_delivery log selector.
2906
290778. A connection timeout was being treated differently from recipients deferred
2908 when testing hosts_max_try with a message that was older than the host's
2909 retry timeout. (The host should not be counted, thus allowing all hosts to
2910 be tried at least once before bouncing.) This may have been the cause of an
2911 occasionally reported bug whereby a message would remain on the queue
2912 longer than the retry timeout, but would be bounced if a delivery was
2913 forced. I say "may" because I never totally pinned down the problem;
2914 setting up timeout/retry tests is difficult. See also the next item.
2915
291679. The ultimate address timeout was not being applied to errors that involved
2917 a combination of host plus message (for example, a timeout on a MAIL
2918 command). When an address resolved to a number of possible hosts, and they
2919 were not all tried for each delivery (e.g. because of hosts_max_try), a
2920 message could remain on the queue longer than the retry timeout.
2921
292280. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2923 Haardt.
2924
292581. Fixed an obscure SMTP outgoing bug which required at least the following
2926 conditions: (a) there was another message waiting for the same server;
2927 (b) the server returned 5xx to all RCPT commands in the first message so
2928 that the message was not completed; (c) the server dropped the connection
2929 or gave a negative response to the RSET that Exim sends to abort the
2930 transaction. The observed case was a dropped connection after DATA that had
2931 been sent in pipelining mode. That is, the server had advertised PIPELINING
2932 but was not implementing it correctly. The effect of the bug was incorrect
2933 behaviour, such as trying another host, and this could lead to a crash.
2934
2935
2936Exim version 4.30
2937-----------------
2938
2939 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2940 and daemon.c were passed as pointers to ints; they should have been
2941 pointers to socklen_t variables (which are typically unsigned ints).
2942
2943 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2944 fixed.
2945
2946 3. Fixed a really odd bug that affected only the testing scheme; patching a
2947 certain fixed string in the binary changed the value of another string that
2948 happened to be identical to the end of the original first string.
2949
2950 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2951 name", it returns that address as the IP address. On some operating
2952 systems (e.g. Solaris), it also passes back the IP address string as the
2953 "host name". However, on others (e.g. Linux), it passes back an empty
2954 string. Exim wasn't checking for this, and was changing the host name to an
2955 empty string, assuming it had been canonicized.
2956
2957 5. Although rare, it is permitted to have more than one PTR record for a given
2958 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2959 all the names associated with an address, because they do in Solaris.
2960 However, it seems that they do not in Linux for data that comes from the
2961 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2962 I found this out when I moved to a new Linux workstation and tried to run
2963 the Exim test suite.
2964
2965 To get round this problem I have changed the code so that it now does its
2966 own call to the DNS to look up PTR records when searching for a host name.
2967 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2968 addresses that are only in /etc/hosts are still found.
2969
2970 This behaviour is, however, controlled by an option called host_lookup_
2971 order, which defaults to "bydns:byaddr". If people want to use the other
2972 order, or indeed, just use one or the other means of lookup, they can
2973 specify it in this variable.
2974
2975 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2976 some operating systems, this comes back from gethostbyaddr() as an empty
2977 string, and this is what Exim used to test for. However, it seems that in
2978 other systems, "." is yielded. Exim now tests for this case too.
2979
2980 7. The values of check_spool_space and check_log_space are now held internally
2981 as a number of kilobytes instead of an absolute number of bytes. If a
2982 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2983 kilobyte. This means that much larger values can be stored.
2984
2985 8. Exim monitor: an attempt to get the action menu when not actually pointing
2986 at a message produces an empty menu entitled "No message selected". This
2987 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2988 no entries in it ("Shell widget menu has zero width and/or height"). So I
2989 have added a single, blank menu entry in this case.
2990
2991 9. Added ${quote_local_part.
2992
299310. MIME decoding is now applied to the contents of Subject: header lines when
2994 they are logged.
2995
299611. Now that a reference to $sender_host_address automatically causes a reverse
2997 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2998 host lookup before query-style lookups in lists that might use this
2999 variable. This has therefore been abolished, and the "net-" prefix is no
3000 longer necessary for query-style lookups.
3001
300212. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3003 have been a typo for LFLAGS, so it has been changed.
3004
300513. The install script calls Exim with "-C /dev/null" in order to find the
3006 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3007 to be output. Howeve, since Exim outputs its version number before the
3008 error, it didn't break the script. It just looked ugly. I fixed this by
3009 always allowing "-C /dev/null" if the caller is root.
3010
301114. Ignore overlarge ACL variable number when reading spool file - insurance
3012 against a later release with more variables having written the file.
3013
301415. The standard form for an IPv6 address literal was being rejected by EHLO.
3015 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3016 this, as well as the form without the "IPv6" on the front.
3017
301816. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3019 OS/Makefile-Darwin file.
3020
302117. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3022 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3023
302418. After change 4.21/52, "%ld" was used to format the contents of the $inode
3025 variable. However, some OS use ints for inodes. I've added cast to long int
3026 to get rid of the compiler warning.
3027
302819. I had forgotten to lock out "/../" in configuration file names when
3029 ALT_CONFIG_PREFIX was set.
3030
303120. Routers used for verification do not need to specify transports. However,
3032 if such a router generated a host list, and callout was configured, Exim
3033 crashed, because it could not find a port number from the (non-existent)
3034 transport. It now assumes port 25 in this circumstance.
3035
303621. Added the -t option to exigrep.
3037
303822. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3039 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3040 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3041 them is set, LOOKUP_LSEARCH is forced.
3042
304323. "exim -bV" now outputs a list of lookups that are included in the binary.
3044
304524. Added sender and host information to the "rejected by local_scan()" log
3046 line; previously there was no indication of these.
3047
304825. Added .include_if_exists.
3049
305026. Change 3.952/11 added an explicit directory sync on top of a file sync for
3051 Linux. It turns out that not all file systems support this. Apparently some
3052 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3053 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3054 not supported on the file descriptor, is now ignored when Exim is trying to
3055 sync a directory. This applies only to Linux.
3056
305727. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3058
305928. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3060 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3061 this.
3062
306329. Added support for maildirsize files from supplied patch (modified a bit).
3064
306530. The use of :fail: followed by an empty string could lead Exim to respond to
3066 sender verification failures with (e.g.):
3067
3068 550 Verification failed for <xxx>
3069 550 Sender verify failed
3070
3071 where the first response line was missing the '-' that indicates it is not
3072 the final line of the response.
3073
307431. The loop for finding the name of the user that called Exim had a hardwired
3075 limit of 10; it now uses the value of finduser_retries, which is used for
3076 all other user lookups.
3077
307832. Added $received_count variable, available in data and not_smtp ACLs, and at
3079 delivery time.
3080
308133. Exim was neglecting to zero errno before one call of strtol() when
3082 expanding a string and expecting an integer value. On some systems this
3083 resulted in spurious "integer overflow" errors. Also, it was casting the
3084 result into an int without checking.
3085
308634. Testing for a connection timeout using "timeout_connect" in the retry rules
3087 did not work. The code looks as if it has *never* worked, though it appears
3088 to have been documented since at least releast 1.62. I have made it work.
3089
309035. The "timeout_DNS" error in retry rules, also documented since at least
3091 1.62, also never worked. As it isn't clear exactly what this means, and
3092 clearly it isn't a major issue, I have abolished the feature by treating it
3093 as "timeout", and writing a warning to the main and panic logs.
3094
309536. The display of retry rules for -brt wasn't always showing the error code
3096 correctly.
3097
309837. Added new error conditions to retry rules: timeout_A, timeout_MX,
3099 timeout_connect_A, timeout_connect_MX.
3100
310138. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3102 to the empty sender.
3103
310439. The daemon was not analysing the content of -oX till after it had closed
3105 stderr and disconnected from the controlling terminal. This meant that any
3106 syntax errors were only noted on the panic log, and the return code from
3107 the command was 0. By re-arranging the code a little, I've made the
3108 decoding happen first, so such errors now appear on stderr, and the return
3109 code is 1. However, the actual setting up of the sockets still happens in
3110 the disconnected process, so errors there are still only recorded on the
3111 panic log.
3112
311340. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3114 connections (as happens on some IP stacks) was logged at start up time as
3115 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3116 it from "IPv6 and IPv4", which means that two separate sockets are being
3117 used.
3118
311941. The debug output for gethostbyname2() or getipnodebyname() failures now
3120 says whether AF_INET or AF_INET6 was passed as an argument.
3121
312242. Exiwhat output was messed up when time zones were included in log
3123 timestamps.
3124
312543. Exiwhat now gives more information about the daemon's listening ports,
3126 and whether -tls-on-connect was used.
3127
312844. The "port" option of the smtp transport is now expanded.
3129
313045. A "message" modifier in a "warn" statement in a non-message ACL was being
3131 silently ignored. Now an error message is written to the main and panic
3132 logs.
3133
313446. There's a new ACL modifier called "logwrite" which writes to a log file
3135 as soon as it is encountered.
3136
313747. Added $local_user_uid and $local_user_gid at routing time.
3138
313948. Exim crashed when trying to verify a sender address that was being
3140 rewritten to "<>".
3141
314249. Exim was recognizing only a space character after ".include". It now also
3143 recognizes a tab character.
3144
314550. Fixed several bugs in the Perl script that creates the exim.8 man page by
3146 extracting the relevant information from the specification. The man page no
3147 longer contains scrambled data for the -d option, and I've added a section
3148 at the front about calling Exim under different names.
3149
315051. Added "extra_headers" argument to the "mail" command in filter files.
3151
315252. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3153 crash.
3154
315553. Installed eximstats 1.29.
3156
315754. Added transport_filter_timeout as a generic transport option.
3158
315955. Exim no longer adds an empty Bcc: header to messages that have no To: or
3160 Cc: header lines. This was required by RFC 822, but it not required by RFC
3161 2822.
3162
316356. Exim used to add From:, Date:, and Message-Id: header lines to any
3164 incoming messages that did not have them. Now it does so only if the
3165 message originates locally, that is, if there is no associated remote host
3166 address. When Resent- header lines are present, this applies to the Resent-
3167 lines rather than the non-Resent- lines.
3168
316957. Drop incoming SMTP connection after too many syntax or protocol errors. The
3170 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3171
317258. Messages for configuration errors now include the name of the main
3173 configuration file - useful now that there may be more than one file in a
3174 list (.included file names were always shown).
3175
317659. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3177 for those rare installations that do not start the daemon as root or run it
3178 setuid root. I've cut out the call to initgroups() if the daemon is not
3179 root at that time.
3180
318160. The Exim user and group can now be bound into the binary as text strings
3182 that are looked up at the start of Exim's processing.
3183
318461. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3185
318662. Added $mailstore_basename variable.
3187
318863. Installed patch to sieve.c from Michael Haardt.
3189
319064. When Exim failed to open the panic log after failing to open the main log,
3191 the original message it was trying to log was written to stderr and debug
3192 output, but if they were not available (the usual case in production), it
3193 was lost. Now it is written to syslog before the two lines that record the
3194 failures to open the logs.
3195
319665. Users' Exim filters run in subprocesses under the user's uid. It is
3197 possible for a "deliver" command or an alias in a "personal" command to
3198 provoke an address rewrite. If logging of address rewriting is configured,
3199 this fails because the process is not running as root or exim. There may be
3200 a better way of dealing with this, but for the moment (because 4.30 needs
3201 to be released), I have disabled address rewrite logging when running a
3202 filter in a non-root, non-exim process.
3203
3204
3205Exim version 4.24
3206-----------------
3207
3208 1. The buildconfig auxiliary program wasn't quoting the value set for
3209 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3210 not defined. This bug was masked in 4.22 by the effect that was fixed in
3211 change 4.23/1.
3212
3213 2. Some messages that were rejected after a message id was allocated were
3214 shown as "incomplete" by exigrep. It no longer does this for messages that
3215 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3216
3217 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3218 have allow_domain_literals set, the ID did not get logged in the <= line.
3219 Domain literals are now always recognized in Message-ID: header lines.
3220
3221 4. The first argument for a ${extract expansion item is the key name or field
3222 number. Leading and trailing spaces in this item were not being ignored,
3223 causing some misleading effects.
3224
3225 5. When deliver_drop_privilege was set, single queue runner processes started
3226 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3227 same command in the process it spins off) were not dropping privilege.
3228
3229 6. When the daemon running as "exim" started a queue runner, it always
3230 re-executed Exim in the spun-off process. This is a waste of effort when
3231 deliver_drop_privilege is set. The new process now just calls the
3232 queue-runner function directly.
3233
3234
3235Exim version 4.23
3236-----------------
3237
3238 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3239 HEADERS_CHARSET.
3240
3241 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3242 ignored. Though the use of -oP was forcing the writing of a pid file, it
3243 was always written to the default place.
3244
3245 3. If the message "no IP address found for host xxxx" is generated during
3246 incoming verification, it is now followed by identification of the incoming
3247 connection (so you can more easily find what provoked it).
3248
3249 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3250
3251 5. Added some features to "harden" Exim a bit more against certain attacks:
3252
3253 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3254 be put in Local/Makefile. This is like the never_users runtime option,
3255 but it cannot be overridden. The default setting is "root".
3256
3257 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3258 prefix string with which any file named in a -C command line option
3259 must start.
3260
3261 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3262 is retained for -C and -D only if the caller of Exim is root. Without
3263 it, the exim user may also use -C and -D and retain privilege.
3264
3265 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3266 command line option is disabled.
3267
3268 6. Macro names set by the -D option must start with an upper case letter, just
3269 like macro names defined in the configuration file.
3270
3271 7. Added "dereference=" facility to LDAP.
3272
3273 8. Two instances of the typo "uknown" in the source files are fixed.
3274
3275 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3276 the Configure-Makefile script screwed up while processing it.
3277
327810. Incorporated PCRE 4.4.
3279
328011. The SMTP synchronization check was not operating right at the start of an
3281 SMTP session. For example, it could not catch a HELO sent before the client
3282 waited for the greeting. There is now a check for outstanding input at the
3283 point when the greeting is written. Because of the duplex, asynchronous
3284 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3285 way, but not yet received, when the check is performed.
3286
328712. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3288 on TCP/IP sockets, because this apparently causes some broken clients to
3289 timeout.
3290
329113. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3292 unchanged) from the Cygwin maintainer.
3293
329414. The code for -bV that shows what is in the binary showed "mbx" when maildir
3295 was supported instead of testing for mbx. Effectively a typo.
3296
329715. The spa authenticator server code was not checking that the input it
3298 received was valid base64.
3299
330016. The debug output line for the "set" modifier in ACLs was not showing the
3301 name of the variable that was being set.
3302
330317. Code tidy: the variable type "vtype_string" was never used. Removed it.
3304
330518. Previously, a reference to $sender_host_name did not cause a DNS reverse
3306 lookup on its own. Something else was needed to trigger the lookup. For
3307 example, a match in host_lookup or the need for a host name in a host list.
3308 Now, if $sender_host_name is referenced and the host name has not yet been
3309 looked up, a lookup is performed. If the lookup fails, the variable remains
3310 empty, and $host_lookup_failed is set to "1".
3311
331219. Added "eqi" as a case-independent comparison operator.
3313
331420. The saslauthd authentication condition could segfault if neither service
3315 nor realm was specified.
3316
331721. If an overflowing value such as "2048M" was set for message_size_limit, the
3318 error message that was logged was misleading, and incoming SMTP
3319 connections were dropped. The message is now more accurate, and temporary
3320 errors are given to SMTP connections.
3321
332222. In some error situations (such as 21 above) Exim rejects all SMTP commands
3323 (except RSET) with a 421 error, until QUIT is received. However, it was
3324 failing to send a response to QUIT.
3325
332623. The HELO ACL was being run before the code for helo_try_verify_hosts,
3327 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3328 ACL is now run after the helo_try_verify_hosts code.
3329
333024. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3331 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3332 case-independent, so other case variants are also recognized). Apparently
3333 some systems use these upper case variants.
3334
333525. If more than two messages were waiting for the same host, and a transport
3336 filter was specified for the transport, Exim sent two messages over the
3337 same TCP/IP connection, and then failed with "socket operation on non-
3338 socket" when it tried to send the third.
3339
334026. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3341
334227. The extern definition of crypt16() in expand.c was not being excluded when
3343 the OS had its own crypt16() function.
3344
334528. Added bounce_return_body as a new option, and bounce_return_size_limit
3346 as a preferred synonym for return_size_limit, both as an option and as an
3347 expansion variable.
3348
334929. Added LIBS=-liconv to OS/Makefile-OSF1.
3350
335130. Changed the default configuration ACL to relax the local part checking rule
3352 for addresses that are not in any local domains. For these addresses,
3353 slashes and pipe symbols are allowed within local parts, but the sequence
3354 /../ is explicitly forbidden.
3355
335631. SPA server authentication was not clearing the challenge buffer before
3357 using it.
3358
335932. log_message in a "warn" ACL statement was writing to the reject log as
3360 well as to the main log, which contradicts the documentation and doesn't
3361 seem right (because no rejection is happening). So I have stopped it.
3362
336333. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3364 However, I am unable to do any testing of this.
3365
336634. Fixed an infelicity in the appendfile transport. When checking directories
3367 for a mailbox, to see if any needed to be created, it was accidentally
3368 using path names with one or more superfluous leading slashes; tracing
3369 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3370
337135. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3372 contents are added to the log line that is written for every discarded
3373 recipient. (Previously a log_message setting was ignored.)
3374
337536. The ${quote: operator now quotes the string if it is empty.
3376
337737. The install script runs exim in order to find its version number. If for
3378 some reason other than non-existence or emptiness, which it checks, it
3379 could not run './exim', it was installing it with an empty version number,
3380 i.e. as "exim-". This error state is now caught, and the installation is
3381 aborted.
3382
338338. An argument was missing from the function that creates an error message
3384 when Exim fails to connect to the socket for saslauthd authentication.
3385 This could cause Exim to crash, or give a corrupted message.
3386
338739. Added isip, isip4, and isip6 to ${if conditions.
3388
338940. The ACL variables $acl_xx are now saved with the message, and can be
3390 accessed later in routers, transports, and filters.
3391
339241. The new lookup type nwildlsearch is like wildlsearch, except that the key
3393 strings in the file are not string-expanded.
3394
339542. If a MAIL command specified a SIZE value that was too large to fit into an
3396 int variable, the check against message_size_limit failed. Such values are
3397 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3398 day this will have to be increased, but I don't think I want to be around
3399 when emails are that large.
3400
3401
3402
3403Exim version 4.22
3404-----------------
3405
3406 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3407 iconv() is not standard in FreeBSD.
3408
3409 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3410 IPv6 enabled. The observed symptom was a segmentation fault on return from
3411 the function os_common_find_running_interfaces() in src/os.c.
3412
3413 3. In the check_special_case() function in daemon.c I had used "errno" as an
3414 argument name, which causes warnings on some systems. This was basically a
3415 typo, since it was named "eno" in the comments!
3416
3417 4. The code that waits for the clock to tick (at a resolution of some fraction
3418 of a second) so as to ensure message-id uniqueness was always waiting for
3419 at least one whole tick, when it could have waited for less. [This is
3420 almost certainly not relevant at current processor speeds, where it is
3421 unlikely to ever wait at all. But we try to future-proof.]
3422
3423 5. The function that sleeps for a time interval that includes fractions of a
3424 second contained a race. It did not block SIGALRM between setting the
3425 timer, and suspending (a couple of lines later). If the interval was short
3426 and the sigsuspend() was delayed until after it had expired, the suspension
3427 never ended. On busy systems this could lead to processes getting stuck for
3428 ever.
3429
3430 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3431 process, before it forks any delivery processes. The open lookup caching
3432 mechanism meant that the open file or database connection was passed into
3433 the delivery process. The problem was that delivery processes always tidy
3434 up cached lookup data. This could cause a problem for the next delivery
3435 process started by the queue runner, because the external queue runner
3436 process does not know about the closure. So the next delivery process
3437 still has data in the lookup cache. In the case of a file lookup, there was
3438 no problem because closing a file descriptor in a subprocess doesn't affect
3439 the parent. However, if the lookup was caching a connection to a database,
3440 the connection was closed, and the second delivery process was likely to
3441 see errors such as "PGSQL: query failed: server closed the connection
3442 unexpectedly". The problem has been fixed by closing all cached lookups
3443 in a queue runner before running a delivery process.
3444
3445 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3446 seem to have the "const" qualifier which it has on other OS. I've
3447 parameterised it.
3448
3449 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3450 *of the same type* (client or server) with the same public name that an
3451 error should be diagnosed.
3452
3453 9. When Exim looked up a host name for an IP address, but failed to find the
3454 original IP address when looking up the host name (a safety check), it
3455 output the message "<ip address> does not match any IP for NULL", which was
3456 confusing, to say the least. The bug was that the host name should have
3457 appeared instead of "NULL".
3458
345910. Since release 3.03, if Exim is called by a uid other than root or the Exim
3460 user that is built into the binary, and the -C or -D options is used, root
3461 privilege is dropped before the configuration file is read. In addition,
3462 logging is switched to stderr instead of the normal log files. If the
3463 configuration then re-defines the Exim user, the unprivileged environment
3464 is probably not what is expected, so Exim logs a panic warning message (but
3465 proceeds).
3466
3467 However, if deliver_drop_privilege is set, the unprivileged state may well
3468 be exactly what is intended, so the warning has been cut out in that case,
3469 and Exim is allowed to try to write to its normal log files.
3470
3471
3472Exim version 4.21
3473-----------------
3474
3475 1. smtp_return_error_details was not giving details for temporary sender
3476 or receiver verification errors.
3477
3478 2. Diagnose a configuration error if two authenticators have the same public
3479 name.
3480
3481 3. Exim used not to create the message log file for a message until the first
3482 delivery attempt. This could be confusing when incoming messages were held
3483 for policy or load reasons. The message log file is now created at the time
3484 the message is received, and an initial "Received" line is written to it.
3485
3486 4. The automatically generated man page for command line options had a minor
3487 bug that caused no ill effects; however, a more serious problem was that
3488 the procedure for building the man page automatically didn't always
3489 operate. Consequently, release 4.20 contains an out-of-date version. This
3490 shouldn't happen again.
3491
3492 5. When building Exim with embedded Perl support, the script that builds the
3493 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3494 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3495
3496 6. The freeze_tell option was not being used for messages that were frozen on
3497 arrival, either by an ACL or by local_scan().
3498
3499 7. Added the smtp_incomplete_transaction log selector.
3500
3501 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3502 was accepting AUTH without a new EHLO.
3503
3504 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3505 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3506 RFC.
3507
350810. Logging of TCP/IP connections (when configured) now happens in the main
3509 daemon process instead of the child process, so that the TCP/IP connection
3510 count is more accurate (but it can never be perfect).
3511
351211. The use of "drop" in a nested ACL was not being handled correctly in the
3513 outer ACL. Now, if condition failure induced by the nested "drop" causes
3514 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3515 or "require"), the connection is dropped.
3516
351712. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3518 that yield "discard" can now be used with an "accept" or a "discard" verb,
3519 but an error is generated for any others (because I can't see a useful way
3520 to define what should happen).
3521
352213. When an ACL is read dynamically from a file (or anywhere else), the lines
3523 are now processed in the same way as lines in the Exim configuration file.
3524 In particular, continuation lines are supported.
3525
352614. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3527
352815. Added -ti meaning -t -i.
3529
353016. Check for letters, digits, hyphens, and dots in the names of dnslist
3531 domains, and warn by logging if others are found.
3532
353317. At least on BSD, alignment is not guarenteed for the array of ifreq's
3534 returned from GIFCONF when Exim is trying to find the list of interfaces on
3535 a host. The code in os.c has been modified to copy each ifreq to an aligned
3536 structure in all cases.
3537
3538 Also, in some cases, the returned ifreq's were being copied to a 'struct
3539 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3540 means the last couple of bytes of an IPv6 address could be chopped if the
3541 ifreq contained only a normal sockaddr (14 bytes storage).
3542
354318. Named domain lists were not supported in the hosts_treat_as_local option.
3544 An entry such as +xxxx was not recognized, and was treated as a literal
3545 domain name.
3546
354719. Ensure that header lines added by a DATA ACL are included in the reject log
3548 if the ACL subsequently rejects the message.
3549
355020. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3551 MD5 (which is deprecated).
3552
355321. When testing a filter file using -bf, Exim was writing a message when it
3554 took the sender from a "From " line in the message, but it was not doing so
3555 when it took $return_path from a Return-Path: header line. It now does.
3556
355722. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3558 with a valid header line field name (a series of printing characters
3559 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3560
356123. Changed "disc" in the source to "disk" to conform to the documentation and
3562 the book and for uniformity.
3563
356424. Ignore Sendmail's -Ooption=value command line item.
3565
356625. When execve() failed while trying to run a command in a pipe transport,
3567 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3568 could be confused with a return value of 69 from the command itself. This
3569 has been changed to 127, the value the shell returns if it is asked to run
3570 a non-existent command. The wording for the related log line suggests a
3571 non-existent command as the problem.
3572
357326. If received_header_text expands to an empty string, do not add a Received:
3574 header line to the message. (Well, it adds a token one on the spool, but
3575 marks it "old" so that it doesn't get used or transmitted.)
3576
357727. Installed eximstats 1.28 (addition of -nt option).
3578
357928. There was no check for failure on the call to getsockname() in the daemon
3580 code. This can fail if there is a shortage of resources on the system, with
3581 ENOMEM, for example. A temporary error is now given on failure.
3582
358329. Contrary to the C standard, it seems that in some environments, the
3584 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3585 program. Exim now does this explicitly; it affects the formatting of
3586 timestamps using strftime().
3587
358830. If exiqsumm was given junk data, it threw up some uninitialized variable
3589 complaints. I've now initialized all the variables, to avoid this.
3590
359132. Header lines added by a system filter were not being "seen" during
3592 transport-time rewrites.
3593
359433. The info_callback() function passed to OpenSSL is set up with type void
3595 (*)(SSL *, int, int), as described somewhere. However, when calling the
3596 function (actually a macro) that sets it up, the type void(*)() is
3597 expected. I've put in a cast to prevent warnings from picky compilers.
3598
359934. If a DNS black list lookup found a CNAME record, but there were no A
3600 records associated with the domain it pointed at, Exim crashed.
3601
360235. If a DNS black list lookup returned more than one A record, Exim ignored
3603 all but the first. It now scans all returned addresses if a particular IP
3604 value is being sought. In this situation, the contents of the
3605 $dnslist_value variable are a list of all the addresses, separated by a
3606 comma and a space.
3607
360836. Tightened up the rules for host name lookups using reverse DNS. Exim used
3609 to accept a host name and all its aliases if the forward lookup for any of
3610 them yielded the IP address of the incoming connection. Now it accepts only
3611 those names whose forward lookup yields the correct IP address. Any other
3612 names are discarded. This closes a loophole whereby a rogue DNS
3613 administrator could create reverse DNS records to break through a
3614 wildcarded host restriction in an ACL.
3615
361637. If a user filter or a system filter that ran in a subprocess used any of
3617 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3618 the wrong values were passed to the pipe command ($thisaddress had the
3619 value of $0, $0 had the value of $1, etc). This bug was introduced by
3620 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3621
362238. Improved the line breaking for long SMTP error messages from ACLs.
3623 Previously, if there was no break point between 40 and 75 characters, Exim
3624 left the rest of the message alone. Two changes have been made: (a) I've
3625 reduced the minimum length to 35 characters; (b) if it can't find a break
3626 point between 35 and 75 characters, it looks ahead and uses the first one
3627 that it finds. This may give the occasional overlong line, but at least the
3628 remaining text gets split now.
3629
363039. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3631 file descriptors might be low, and that setting 1000 would always raise it.
3632 It turns out that in some environments, the limit is already over 1000 and
3633 that lowering it causes trouble. So now Exim takes care not to decrease it.
3634
363540. When delivering a message, the value of $return_path is set to $sender_
3636 address at the start of routing (routers may change the value). By an
3637 oversight, this default was not being set up when an address was tested by
3638 -bt or -bv, which affected the outcome if any router or filter referred to
3639 $return_path.
3640
364141. The idea of the "warn" ACL verb is that it adds a header or writes to the
3642 log only when "message" or "log_message" are set. However, if one of the
3643 conditions was an address verification, or a call to a nested ACL, the
3644 messages generated by the underlying test were being passed through. This
3645 no longer happens. The underlying message is available in $acl_verify_
3646 message for both "message" and "log_message" expansions, so it can be
3647 passed through if needed.
3648
364942. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3650 new expansion $bh_ to give the encoded byte string without charset
3651 translation. Translation happens only if iconv() is available; HAVE_ICONV
3652 indicates this at build time. HEADERS_CHARSET gives the charset to
3653 translate to; headers_charset can change it in the configuration, and
3654 "headers charset" can change it in an individual filter file.
3655
365643. Now that we have a default RFC 2047 charset (see above), the code in Exim
3657 that creates RFC 2047 encoded "words" labels them as that charset instead
3658 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3659 expansion operator; (ii) when Exim creates a From: line for a local
3660 message; (iii) when a header line is rewritten to include a "phrase" part.
3661
366244. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3663 buggy, causing it to skip the first lines of messages whose message ID
3664 ended in 'D'. This would not have bitten before Exim release 4.14, because
3665 message IDs were unlikely to end in 'D' before then. The effect was to have
3666 incorrect size information for certain domains.
3667
366845. #include "config.h" was missing at the start of the crypt16.c module. This
3669 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not