User, not system, error message for VRFY defer.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
81e509d7 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.328 2006/03/16 11:14:46 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
214e2000
PH
6Exim version 4.61
7-----------------
8
9PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
15 addresses as local.
16
f9daeae0
PH
17PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
19
7e66e54d
PH
20PH/03 Added disable_ipv6.
21
c8ea1597
PH
22PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
27 grumble.
28
911f6fde
PH
29PH/05 If group was specified without a user on a router, and no group or user
30 was specified on a transport, the group from the router was ignored.
31
47ca6d6c
PH
32PH/06 Increased the number of ACL variables to 20 of each type, and arranged
33 for visible compile-time settings that can be used to change these
34 numbers, for those that want even more. Backwards compatibility with old
35 spool files has been maintained. However, going back to a previous Exim
36 release will lost any variables that are in spool files.
37
ed0e9820
PH
38PH/07 Two small changes when running in the test harness: increase delay when
39 passing a TCP/IP connection to a new process, in case the original
40 process has to generate a bounce, and remove special handling of
41 127.0.0.2 (sic), which is no longer necessary.
42
eff37e47
PH
43PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
45
1921d2ea
PH
46PH/09 Moved a debug statement in filter processing to avoid a race problem when
47 testing.
48
b3f69ca8
JJ
49JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
51
52JJ/02 exipick: Added support for new ACL variable spool format introduced
53 in 4.61-PH/06
54
424a1c63
PH
55PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
56 syntactically invalid From: or Reply-to: line, and a filter used this to
57 generate an autoreply, and therefore failed to obtain an address for the
58 autoreply, Exim could try to deliver to a non-existent relative file
59 name, causing unrelated and misleading errors. What now happens is that
60 it logs this as a hard delivery error, but does not attempt to create a
61 bounce message.
62
7a100415
PH
63PH/11 The exinext utility has a -C option for testing purposes, but although
64 the given file was scanned by exinext itself; it wasn't being passed on
65 when Exim was called.
66
19b9dc85
PH
67PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
68 an end-of-file indication when reading a command response.
69
309bd837
PH
70PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
71 compiled. In many other places in Exim, IPv6 addresses are always
72 recognized, so I have changed this. It also means that IPv4 domain
73 literals of the form [IPV4:n.n.n.n] are now always recognized.
74
59e82a2a
PH
75PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
76 used if the router is not running as root, for example, when verifying at
77 ACL time, or when using -bh. The debugging output from this situation was
78 non-existent - all you got was a failure to exec. I have made two
79 changes:
80
81 (a) Failures to set uid/gid, the current directory, or a process leader
82 in a subprocess such as that created by queryprogram now generate
83 suitable debugging ouput when -d is set.
84
85 (b) The queryprogram router detects when it is not running as root,
86 outputs suitable debugging information if -d is set, and then runs
87 the subprocess without attempting to change uid/gid.
88
9edc04ce
PH
89PH/15 Minor change to Makefile for building test_host (undocumented testing
90 feature).
91
1349e1e5
PH
92PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
93 additional section of a DNS packet that returns MX or SRV records.
94 Instead, it always explicitly searches for A/AAAA records. This avoids
95 major problems that occur when a DNS server includes only records of one
96 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
97 fixed another bug: if SRV records were looked up and the corresponding
98 address records were *not* found in the additional section, the port
99 values from the SRV records were lost.
100
ea49d0e1
PH
101PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
102 using the correct key (the original address) when searching the retry
103 rules in order to find which one to use for generating the retry hint.
104
064a94c9
PH
105PH/18 If quota_warn_message contains a From: header, Exim now refrains from
106 adding the default one. Similarly, if it contains a Reply-To: header, the
107 errors_reply_to option, if set, is not used.
108
727071f8
PH
109PH/19 When calculating a retry time, Exim used to measure the "time since
110 failure" by looking at the "first failed" field in the retry record. Now
111 it does not use this if it is later than than the arrival time of the
112 message. Instead it uses the arrival time. This makes for better
113 behaviour in cases where some deliveries succeed, thus re-setting the
114 "first failed" field. An example is a quota failure for a huge message
115 when small messages continue to be delivered. Without this change, the
116 "time since failure" will always be short, possible causing more frequent
117 delivery attempts for the huge message than are intended.
118
f78eb7c6
PH
119PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
122
21c28500
PH
123PH/21 Make -bV show the size of off_t variables so that the test suite can
124 decide whether to run tests for quotas > 2G.
125
126PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
127 mailbox_size, and mailbox_filecount in the appendfile transport. If a
128 filecount value is greater than 2G or if a quota value is greater than 2G
129 on a system where the size of off_t is not greater than 4, a panic error
130 is given.
131
1688f43b
PH
132PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
133 never match. The debug and -bh output now contains an explicit error
134 message indicating a malformed IPv4 address or mask.
135
136PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
137 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
138 PH/23 above applies.
139
9675b384
PH
140PH/25 Do not write to syslog when running in the test harness. The only
141 occasion when this arises is a failure to open the main or panic logs
142 (for which there is an explicit test).
143
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
PH
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
46218253
PH
299PH/58 Allow for the insertion of a newline as well as a space when a string
300 is turned into more than one encoded-word during RFC 2047 encoding. The
301 Sieve code now uses this.
302
e97957bc
PH
303PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
304 data_4xx, lost_connection, tls_required.
305
81e509d7
PH
306PH/60 When a VRFY deferred or FAILED, the log message rather than the user
307 message was being sent as an SMTP response.
308
214e2000 309
5de37277
PH
310Exim version 4.60
311-----------------
312
cc38ddbf
PH
313PH/01 Two changes to the default runtime configuration:
314
315 (1) Move the checks for relay_from_hosts and authenticated clients from
316 after to before the (commented out) DNS black list checks.
317
318 (2) Add control=submission to the relay_from_hosts and authenticated
319 clients checks, on the grounds that messages accepted by these
320 statements are most likely to be submissions.
5de37277 321
72fdd6ae
PH
322PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
323
324 (1) Generate an error if the third argument for the ${prvs expansion is
325 not a single digit.
326
327 (2) Treat a missing third argument of ${prvscheck as if it were an empty
328 string.
329
330 (3) Reset the variables that are obtained from the first argument of
331 ${prvscheck and used in the second argument before leaving the code,
332 because their memory is reclaimed, so using them afterwards may do
333 silly things.
334
335 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
336 one (it's much easier than Tom thought :-).
337
338 (5) Because of (4), we can now allow for the use of $prvscheck_result
339 inside the third argument.
cb9328de 340
cb741023
PH
341PH/03 For some reason, the default setting of PATH when running a command from
342 a pipe transport was just "/usr/bin". I have changed it to
343 "/bin:/usr/bin".
344
f174f16e
PH
345PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
346 anything to be listed in the output from -bV.
b2f5a032 347
c25242d7
PH
348PH/05 When a filter generated an autoreply, the entire To: header line was
349 quoted in the delivery log line, like this:
350
351 => >A.N.Other <ano@some.domain> <original@ddress> ...
352
353 This has been changed so that it extracts the operative address. There
354 may be more than one such address. If so, they are comma-separated, like
355 this:
356
357 => >ano@some.domain,ona@other.domain <original@ddress> ...
358
82c19f95
PH
359PH/06 When a client host used a correct literal IP address in a HELO or EHLO
360 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
361 not being looked up in the rDNS to get a host name, Exim was showing the
362 IP address twice in Received: lines, even though the IP addresses were
363 identical. For example:
364
365 Received: from [1.2.3.4] (helo=[1.2.3.4])
366
367 However, if the real host name was known, it was omitting the HELO data
368 if it matched the actual IP address. This has been tidied up so that it
369 doesn't show the same IP address twice.
370
d7ffbc12
PH
371PH/07 When both +timestamp and +memory debugging was on, the value given by
372 $tod_xxx expansions could be wrong, because the tod_stamp() function was
373 called by the debug printing, thereby overwriting the timestamp buffer.
374 Debugging no longer uses the tod_stamp() function when +timestamp is set.
375
9f526266
PH
376PH/08 When the original message was included in an autoreply transport, it
377 always said "this is a copy of the message, including all the headers",
378 even if body_only or headers_only was set. It now gives an appropriate
379 message.
380
87fcc8b9
PH
381PH/09 Applied a patch from the Sieve maintainer which:
382
383 o fixes some comments
384 o adds the (disabled) notify extension core
385 o adds some debug output for the result of if/elsif tests
386 o points to the current vacation draft in the documentation
387 and documents the missing references header update
388
389 and most important:
390
391 o fixes a bug in processing the envelope test (when testing
392 multiple envelope elements, the last element determinted the
393 result)
394
456682f5
PH
395PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
396 Electronic Mail") by including:
397
398 Auto-submitted: auto-generated
399
400 in the messages that it generates (bounce messages and others, such as
401 warnings). In the case of bounce messages for non-SMTP mesages, there was
402 also a typo: it was using "Auto_submitted" (underscore instead of
403 hyphen). Since every message generated by Exim is necessarily in response
404 to another message, thes have all been changed to:
405
406 Auto-Submitted: auto-replied
407
408 in accordance with these statements in the RFC:
409
410 The auto-replied keyword:
411
412 - SHOULD be used on messages sent in direct response to another
413 message by an automatic process,
414
415 - MUST NOT be used on manually-generated messages,
416
417 - MAY be used on Delivery Status Notifications (DSNs) and Message
418 Disposition Notifications (MDNs),
419
420 - MUST NOT be used on messages generated by automatic or periodic
421 processes, except for messages which are automatic responses to
422 other messages.
423
3e46c1aa
PH
424PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
425 to the default Received: header definition.
456682f5 426
49826d12
PH
427PH/12 Added log selector acl_warn_skipped (default on).
428
eba0c039
PH
429PH/13 After a successful wildlsearch lookup, discard the values of numeric
430 variables because (a) they are in the wrong storage pool and (b) even if
431 they were copied, it wouldn't work properly because of the caching.
432
a0d6ba8a
PH
433PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
434 checking when decoding. Apparently there are clients that generate
435 overlong encoded strings. Why am I not surprised?
436
f0917727
PH
437PH/15 If the first argument of "${if match_address" was not empty, but did not
438 contain an "@" character, Exim crashed. Now it writes a panic log message
439 and treats the condition as false.
440
096fee00
PH
441PH/16 In autoreply, treat an empty string for "once" the same as unset.
442
024bd3c2
PH
443PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
444 extension "envelope-auth". The code is finished and in agreement with
445 other implementations, but there is no documentation so far and in fact,
446 nobody wrote the draft yet. This extension is currently #undef'ed, thus
447 not changing the active code.
448
449 Print executed "if" and "elsif" statements when debugging is used. This
450 helps a great deal to understand what a filter does.
451
452 Document more things not specified clearly in RFC3028. I had all this
453 sorted out, when out of a sudden new issues came to my mind. Oops."
454
df199fec
PH
455PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
456 (Bugzilla #53).
457
d27f1df3
PH
458PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
459 canonical form (as documented). However, after a host name lookup from
460 the IP address, check_host() was doing a simple string comparison with
461 addresses acquired from the DNS when checking that the found name did
462 have the original IP as one of its addresses. Since any found IPv6
463 addresses are likely to be in abbreviated form, the comparison could
464 fail. Luckily, there already exists a function for doing the comparison
465 by converting both addresses to binary, so now that is used instead of
466 the text comparison.
467
96776534
PH
468PH/20 There was another similar case to PH/19, when a complete host name was
469 given in a host list; looking up its IP address could give an abbreviated
470 form, whereas the current host's name might or might not be abbreviated.
471 The same fix has been applied.
472
5de37277 473
9a799bc0
PH
474Exim version 4.54
475-----------------
476
477PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
478 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
479 It now does.
480
99a4b039
PH
481PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
482 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
483
484PH/03 Typo: missing ".o" in src/pcre/Makefile.
485
4b233853
PH
486PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
487 header line, restrict the check to what is listed in RFCs 2369 and 2929.
488 Also, for "Auto-Submitted", treat anything other than "no" as
489 non-personal, in accordance with RFC 3834. (Previously it treated
490 anything starting "auto-" as non-personal.)
491
8857ccfd
PH
492TF/01 The control=submission/name=... option had a problem with syntax
493 errors if the name included a slash character. The /name= option
494 now slurps the rest of the string, so it can include any characters
495 but it must come last in the list of options (after /sender_retain
496 or /domain=).
497
433a2980
PH
498PH/05 Some modifications to the interface to the fake nameserver for the new
499 testing suite.
500
3e46c1aa 501
9a799bc0 502
e3a311ba
TK
503Exim version 4.53
504-----------------
505
506TK/01 Added the "success_on_redirect" address verification option. See
507 NewStuff for rationale and an example.
508
13b685f9
PH
509PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
510
395ff96d
PH
511PH/02 Patch to exigrep to allow it to work on syslog lines.
512
5b68f6e4
PH
513PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
514 fread() to skip over the body file's header line, because in Cygwin the
515 header line is locked and is inaccessible.
516
1ab52c69
PH
517PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
518 co-exist for some time) to make it clear that it is the Exim ID that is
519 referenced, not the Message-ID: header line.
520
b07e6aa3
PH
521PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
522 string_format() function, because snprintf() does not exist on all
523 operating systems.
524
254e032f
PH
525PH/06 The use of forbid_filter_existstest now also locks out the use of the
526 ${stat: expansion item.
527
3af76a81
PH
528PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
529 protocol synchronization error", to keep the pedants happy.
530
2548ba04
PH
531PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
532 well as for IRIX systems, when gcc is being used. See the host.c source
533 file for comments.
534
b6c6011d
PH
535PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
536
cf39cf57
PH
537PH/10 Named domain lists were not working if used in a queue_smtp_domains
538 setting.
539
f1513293
PH
540PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
541 transport and to the smtp transport in LMTP mode.
542
727549a4
PH
543TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
544
af46795e
PH
545PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
546 run a filter in a subprocess. This could lead to confusion in subsequent
547 lookups in the parent process. There should also be a search_tidyup() at
548 the end of the subprocess.
549
d7b47fd0
PH
550PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
551 only if the host matched helo_try_verify_hosts, which caused the
552 verification to occur when the EHLO/HELO command was issued. The ACL just
553 tested the remembered result. Now, if a previous verification attempt has
554 not happened, "verify = helo" does it there and then.
555
ee744174
JJ
556JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
557
b582ab87
PH
558TK/03 Fix log output including CR from clamd.
559
41a13e0a
PH
560PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
561 exist provoked a memory error which could cause a segfault.
562
f625cc5a
PH
563PH/15 Installed PCRE 6.2
564
565PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
566
21f7af35
PH
567PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
568 of the problem. Specifically, suggested +O2 rather than +O1 for the
569 HP-UX compiler.
570
31480e42
PH
571PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
572
2d280592
PH
573PH/20 If a delivery was routed to a non-standard port by means of an SRV
574 record, the port was not correctly logged when the outgoing_port log
575 selector was set (it logged the transort's default port).
576
7cd1141b
PH
577PH/21 Added support for host-specific ports to manualroute, queryprogram,
578 fallback_hosts, and "hosts" in the smtp transport.
579
580PH/22 If the log selector "outgoing_port" is set, the port is now also given on
581 host errors such as "Connection refused".
582
750af86e
PH
583PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
584 authentication with radiusclient 0.4.9:
585
586 - Error returned from rc_read_config was caught wrongly
587 - Username/password not passed on to radius server due to wrong length.
588
589 The presumption is that some radiusclient API changes for 4.51/PH/17
590 were not taken care of correctly. The code is still untested by me (my
591 Linux distribution still has 0.3.2 of radiusclient), but it was
592 contributed by a Radius user.
593
594PH/24 When doing a callout, the value of $domain wasn't set correctly when
595 expanding the "port" option of the smtp transport.
596
4304270b
TK
597TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
598 while reading a MIME header. Thanks to Tom Hughes for a patch.
599
750af86e
PH
600PH/24 Include config.h inside local_scan.h so that configuration settings are
601 available.
602
64ffc24f
PH
603PH/25 Make $smtp_command_argument available after all SMTP commands. This means
604 that in an ACL for RCPT (for example), you can examine exactly what was
605 received.
606
5dd9625b
PH
607PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
608 commands, but it was not correctly comparing the address with the actual
609 client host address. Thus, it would show the EHLO address in Received:
610 header lines when this was not necessary.
611
5591031b
PH
612PH/27 Added the % operator to ${eval:}.
613
ba18e66a
PH
614PH/28 Exim tries to create and chdir to its spool directory when it starts;
615 it should be ignoring failures (because with -C, for example, it has lost
616 privilege). It wasn't ignoring creation failures other than "already
617 exists".
618
9cec981f
PH
619PH/29 Added "crypteq" to the list of supported features that Exim outputs when
620 -bV or -d is used.
621
aa2b5c79
PH
622PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
623 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
624 too many continuations, the temporary file was not being removed, and the
625 return code was incorrect.
aa2b5c79 626
48a53b7f
PH
627PH/31 Missing "BOOL" in function definition in filtertest.c.
628
1c59d63b
PH
629PH/32 Applied Sieve patches from the maintainer.
630
671012da
TK
631TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
632
1509d3a8
PH
633PH/33 Added "verify = not_blind".
634
635PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
636 Local/Makefile (with some defaults set). These are used in built scripts
637 such as exicyclog, but they have never been used in the exim_install
638 script (though there are many overriding facilities there). I have
639 arranged that the exim_install script now takes note of these two
640 settings.
641
642PH/35 Installed configuration files for Dragonfly.
643
2fe1a124
PH
644PH/36 When a locally submitted message by a trusted user did not contain a
645 From: header, and the sender address was obtained from -f or from an SMTP
646 MAIL command, and the trusted user did not use -F to supply a sender
647 name, $originator_name was incorrectly used when constructing a From:
648 header. Furthermore, $originator_name was used for submission mode
649 messages from external hosts without From: headers in a similar way,
650 which is clearly wrong.
651
8800895a
PH
652PH/37 Added control=suppress_local_fixups.
653
ccfdb010
PH
654PH/38 When log_selector = +received_sender was set, and the addition of the
655 sender made the log line's construction buffer exactly full, or one byte
656 less than full, an overflow happened when the terminating "\n" was
657 subsequently added.
658
1130bfb0
PH
659PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
660 when the result of a list match is failure because a DNS lookup failed.
661
ebcb507f
PH
662PH/40 RM_COMMAND is now used in the building process.
663
c35e155c
PH
664PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
665 the "build-* directories that it finds.
666
95d1f782
PH
667PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
668 address in a domain literal was a prefix of an interface address.
669
fd6de02e
PH
670PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
671 when verifying a sender address, unless rewrite_headers is false.
672
58de37c5
PH
673PH/44 Wrote a long comment about why errors_to addresses are verified as
674 recipients, not senders.
675
261cf466
TF
676TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
677 the ratelimit ACL was added.
678
3ee512ff
PH
679PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
680
e08c430f
PH
681PH/46 Added extra information about PostgreSQL errors to the error string.
682
bef5a11f
PH
683PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
684 avoiding the need to install special zones in a real server. This is
685 backwards compatible; if it can't find the fake resolver, it drops back.
686 Thus, both old and new test suites can be run.
687
7546de58
TF
688TF/02 Added util/ratelimit.pl
689
e5d5a95f
TF
690TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
691 clock is set back in time.
692
2e88a017
TF
693TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
694 Candler <B.Candler@pobox.com>.
695
a5f65aa4
TF
696TF/05 The fix for PH/43 was not completely correct; widen_domains is always
697 OK for addresses that are the result of redirections.
698
e7726cbf
PH
699PH/48 A number of further additions for the benefit of the new test suite,
700 including a fake gethostbyname() that interfaces to the fake DNS resolver
701 (see PH/47 above).
702
a7fdad5b
TF
703TF/06 The fix for widen_domains has also been applied to qualify_single and
704 search_parents which are the other dnslookup options that can cause
705 header rewrites.
706
6af56900
PH
707PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
708 type ("H").
709
0925ede6
PH
710PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
711
66afa403
TF
712TF/07 Exim produced the error message "an SRV record indicated no SMTP
713 service" if it encountered an MX record with an empty target hostname.
714 The message is now "an MX or SRV record indicated no SMTP service".
715
0154e85a
TF
716TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
717 if the DNS of the sending site is misconfigured. This is quite a
718 common situation. This change restores the behaviour of treating a
719 helo verification defer as a failure.
720
16f12c76
PH
721PH/51 If self=fail was set on a router, the bounce message did not include the
722 actual error message.
723
bbe902f0 724
e5a9dba6
PH
725Exim version 4.52
726-----------------
727
728TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
729
22c3b60b
PH
730PH/01 When a transport filter timed out in a pipe delivery, and the pipe
731 command itself ended in error, the underlying message about the transport
732 filter timeout was being overwritten with the pipe command error. Now the
733 underlying error message should be appended to the second error message.
734
06a9b4b5
PH
735TK/01 Fix poll() being unavailable on Mac OSX 10.2.
736
c1ac6996
PH
737PH/02 Reduce the amount of output that "make" produces by default. Full output
738 can still be requested.
739
9c7a242c
PH
740PH/03 The warning log line about a condition test deferring for a "warn" verb
741 was being output only once per connection, rather than after each
742 occurrence (because it was using the same function as for successful
743 "warn" verbs). This seems wrong, so I have changed it.
744
87ba3f5f
PH
745TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
746 it should not have, which might have caused a crash in the right
747 circumstances, but probably never did.
748
749PH/04 Installed a modified version of Tony Finch's patch to make submission
750 mode fix the return path as well as the Sender: header line, and to
751 add a /name= option so that you can make the user's friendly name appear
752 in the header line.
753
29aba418
TF
754TF/03 Added the control = fakedefer ACL modifier.
755
fe0dab11
TF
756TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
757 Mark Lowes for thorough testing.
870f6ba8 758
11d337a4
TK
759TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
760
761TK/03 Merged latest SRS patch from Miles Wilton.
762
415c8f3b
PH
763PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
764 with the definition in sysexits.h (which is #included earlier).
765 Fortunately, Exim does not actually use EX_OK. The code used to try to
766 preserve the sysexits.h value, by assumimg that macro definitions were
767 scanned for macro replacements. I have been disabused of this notion,
768 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 769
958541e9
PH
770PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
771 in the smtp transport. When a block could not be written in a single
772 write() function, the timeout was being re-applied to each part-write.
773 This seems wrong - if the receiver was accepting one byte at a time it
774 would take for ever. The timeout is now adjusted when this happens. It
775 doesn't have to be particularly precise.
776
c206415f
TK
777TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
778 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
779
2a4be8f9
PH
780PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
781 without a domain if the check to <postmaster@domain> fails.
782
1cba11c5
SC
783SC/01 Eximstats: added -xls and the ability to specify output files
784 (patch written by Frank Heydlauf).
785
786SC/02 Eximstats: use FileHandles for outputing results.
787
788SC/03 Eximstats: allow any combination of xls, txt, and html output.
789
790SC/04 Eximstats: fixed display of large numbers with -nvr option
791
792SC/05 Eximstats: fixed merging of reports with empty tables.
793
794SC/06 Eximstats: added the -include_original_destination flag
795
796SC/07 Eximstats: removed tabs and trailing whitespace.
797
1005d00e
TK
798TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
799
800TK/06 MBOX spool code: Add real "From " MBOX separator line
801 so the .eml file is really in mbox format (even though
802 most programs do not really care). Patch from Alex Miller.
803
804TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
805 The latter is generated from $received_to and is only set if the
806 message has one envelope recipient. SA can use these headers,
807 obviously out-of-the-box. Patch from Alex Miller.
808
9b4768fa
PH
809PH/08 The ${def test on a variable was returning false if the variable's
810 value was "0", contrary to what the specification has always said!
811 The result should be true unless the variable is empty.
812
813PH/09 The syntax error of a character other than { following "${if
814 def:variable_name" (after optional whitespace) was not being diagnosed.
815 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
816 accidental colon was present, for example, could give incorrect results.
817
0d7eb84a
PH
818PH/10 Tidied the code in a number of places where the st_size field of a stat()
819 result is used (not including appendfile, where other changes are about
820 to be made).
821
822PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
823 This involved changing a lot of size variables from int to off_t. It
824 should work with maildirs and everything.
825
40727bee
TK
826TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
827 spamd dying while we are connected to it.
828
554d2369
TF
829TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
830 <jgh@wizmail.org>
831
1f922db1
PH
832PH/12 Applied Alex Kiernan's patch for the API change for the error callback
833 function for BDB 4.3.
834
ef213c3b
PH
835PH/13 Changed auto_thaw such that it does not apply to bounce messages.
836
8ac170f3
PH
837PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
838 the sources for PCRE have been re-arranged and more files are now
839 involved.
840
b1c749bb
PH
841PH/15 The code I had for printing potentially long long variables in PH/11
842 above was not the best (it lost precision). The length of off_t variables
843 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
844 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
845 to be "long long int" or "long int". This is needed for the internal
846 formatting function string_vformat().
b1c749bb 847
4aac9b49
PH
848PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
849 the configuration file to be ":syslog", then the script "guesses" where
850 the logs files are, rather than using the compiled in default. In our
851 case the guess is not the same as the compiled default, so the script
852 suddenly stopped working when I started to use syslog. The patch checks
853 to see if log_file_path is "". If so, it attempts to read it from exim
854 with no configuration file to get the compiled in version, before it
855 falls back to the previous guessing code."
856
294520c8
TK
857TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
858 implementing BATV in an Exim configuration. See NewStuff for the gory
859 details.
860
5bd022fe
PH
861PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
862 Makefile that are specific to HP-UX.
863
90e9ce59
PH
864PH/18 If the "use_postmaster" option was set for a recipient callout together
865 with the "random" option, the postmaster address was used as the MAIL
866 FROM address for the random test, but not for the subsequent recipient
867 test. It is now used for both.
868
5ea81592
PH
869PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
870 patch removes a few documentation additions to RFC 3028, because the
871 latest draft now contains them. It adds the new en;ascii-case comparator
872 and a new error check for 8bit text in MIME parts. Comparator and
873 require names are now matched exactly. I enabled the subaddress
874 extension, but it is not well tested yet (read: it works for me)."
875
c6c2dc1d
PH
876PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
877 rework some of the code of TK/09 above to avoid the hardwired use of
878 "%lld" and "long long". Replaced the call to snprintf() with a call to
879 string_vformat().
880
fffffe4c
PH
881PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
882 records point to non-existent hosts", "retry timeout exceeded", and
883 "retry time not reached for any host after a long failure period".
ca02eafb 884
9a26b6b2
PH
885PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
886 experimental DomainKeys support:
887
888 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
889 (2) On an error such as an illegally used "control", the wrong name for
890 the control was given.
891
892 These problems did NOT occur unless DomainKeys support was compiled.
893
4aee0225
PH
894PH/23 Added daemon_startup_retries and daemon_startup_sleep.
895
32d668a5
PH
896PH/24 Added ${if match_ip condition.
897
8187c3f3
PH
898PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
899 databases so that it will be absolutely obvious if a crash occurs in the
900 DB library. This is a regular occurrence (often caused by mis-matched
901 db.h files).
902
ff790e47 903PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
904 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
905 picked up on a user's system that detects such things. There doesn't seem
906 to be a gcc warning option for this - only an attribute that has to be
907 put on the function's prototype. It seems that in Fedora Core 4 they have
908 set this on a number of new functions. No doubt there will be more in due
909 course.
ff790e47 910
5417f6d1
PH
911PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
912 specify a transport. However, if an address that was verified by such a
913 router was the subject of a callout, Exim crashed because it tried to
914 read the rcpt_include_affixes from the non-existent transport. Now it
915 just assumes that the setting of that option is false. This bug was
916 introduced by 4.51/PH/31.
917
59cf8544
PH
918PH/28 Changed -d+all to exclude +memory, because that information is very
919 rarely of interest, but it makes the output a lot bigger. People tend to
920 do -d+all out of habit.
921
e7ad8a65
PH
922PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
923 code in os-type was giving problems when libc.so lives in lib64, like on
924 x86_64 Fedora Core.
925
ade42478
PH
926PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
927 aren't the modern standard, and it seems that some systems' include files
928 don't always have them. Exim was already checking for some of the newer
929 ones like T_AAAA, and defining it itself. I've added checks for all the
930 record types that Exim uses.
931
182ad5cf
PH
932PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
933 not automatically generating a new one, as it is supposed to. This
934 prevented TLS from working. If the file did exist, but contained invalid
935 data, a new version was generated, as expected. It was only the case of a
936 non-existent file that was broken.
937
b0d9fc80
TK
938TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
939 with a change in libdomainkeys > 0.64.
940
941TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
942 from DNS. If the selector record carries the flag, it now has
943 precedence over the domain-wide flag.
944
945TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
946
47c7a64a
PH
947PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
948 the use of a port name that isn't defined in /etc/services) occurred, the
949 message was deferred as in a normal delivery, and thus remained on the
950 spool, instead of being failed because of the mua_wrapper setting. This
951 is now fixed, and I tidied up some of the mua_wrapper messages at the
952 same time.
953
a388bce4
SC
954SC/08 Eximstats: whilst parsing the mainlog(s), store information about
955 the messages in a hash of arrays rather than using individual hashes.
956 This is a bit cleaner and results in dramatic memory savings, albeit
957 at a slight CPU cost.
958
959SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
960 as requested by Marc Sherman.
961
962SC/10 Eximstats: added histograms for user specified patterns as requested
963 by Marc Sherman.
964
0793e4ed
SC
965SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
966
c58b88df
PH
967PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
968 fopen() in the content-scanning modules that did not already have it.
969
e7ad8a65 970
7982096b
PH
971Exim version 4.51
972-----------------
973
1a46a8c5
PH
974TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
975 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
976
2f079f46 977TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
978
979TK/03 Fix ACL "regex" condition not being available in MIME ACL.
980
981PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
982 to test Sieve filters that use "vacation".
983
984PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
985 that changes the way the GnuTLS parameters are stored in the cache file.
986 The new format can be generated externally. For backward compatibility,
987 if the data in the cache doesn't make sense, Exim assumes it has read an
988 old-format file, and it generates new data and writes a new file. This
989 means that you can't go back to an older release without removing the
990 file.
991
992PH/03 A redirect router that has both "unseen" and "one_time" set does not
993 work if there are any delivery delays because "one_time" forces the
994 parent to be marked "delivered", so its unseen clone is never tried
995 again. For this reason, Exim now forbids the simultaneous setting of
996 these two options.
997
998PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
999 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1000 entry if you want to know the details. The fix, however, neglected to
1001 consider the case when local delivery batching is involved. The test for
1002 "previously delivered" was not happening when checking to see if an
1003 address could be batched with a previous (undelivered) one; under
1004 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1005 address.
1a46a8c5
PH
1006
1007PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1008 in its include files, and this causes problems building Exim.
1009
1010PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1011 header_syntax) but Exim was just ignoring anything given after a slash.
1012 In particular, this caused confusion with an attempt to use "verify =
1013 reverse_host_lookup/defer_ok". An error is now given when options are
1014 supplied for verify items that do not have them. (Maybe reverse_host_
1015 lookup should have a defer_ok option, but that's a different point.)
1016
1017PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1018 defined by RFC 821) to 2048, because there were problems with some AUTH
1019 commands, and RFC 1869 says the size should be increased for extended
1020 SMTP commands that take arguments.
1021
1022PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1023 Finch).
1024
1025PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1026 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1027
49c2d5ea
PH
1028PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1029 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1030 whatever). Otherwise the password may appear in the log. Following change
1031 PH/42 below, there is no longer a chance of it appearing in a bounce
1032 message.
49c2d5ea 1033
bf759a8b
PH
1034PH/11 Installed exipick version 20050225.0 from John Jetmore.
1035
83364d30
PH
1036PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1037 of its addresses was ever tried. (Bugzilla bug #2.)
1038
7999bbd7
PH
1039PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1040 the result incorrectly in the debug output. (It correctly added a newline
1041 to what was transported.)
1042
7dbf77c9
PH
1043TF/01 Added $received_time.
1044
74e0617f
PH
1045PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1046 commented out examples of how to interface to a virus scanner and to
1047 SpamAssassin. Also added commented examples of av_scanner and
1048 spamd_address settings.
1049
2f079f46
PH
1050PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1051 and controls are allowed in which ACLs. There were a couple of minor
1052 errors. Some of the entries in the conditions table (which is a table of
1053 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1054 negation of where the condition IS allowed.
1055
8c841523
PH
1056PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1057
7766a4f0
PH
1058PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1059 header file does not have a version number, so I've had to invent a new
1060 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1061 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1062 radiusclient), but it was contributed by a Radius user.
1063
8b417f2c
PH
1064PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1065 files or directories, for OpenSSL.
1066
901f42cb
PH
1067PH/19 When an Exim process that is running as root has to create an Exim log
1068 file, it does so in a subprocess that runs as exim:exim so as to get the
1069 ownership right at creation (otherwise, other Exim processes might see
1070 the file with the wrong ownership). There was no test for failure of this
1071 fork() call, which would lead to the process getting stuck as it waited
1072 for a non-existent subprocess. Forks do occasionally fail when resources
1073 run out. I reviewed all the other calls to fork(); they all seem to check
1074 for failure.
1075
f9b9210e
PH
1076PH/20 When checking for unexpected SMTP input at connect time (before writing
1077 the banner), Exim was not dealing correctly with a non-positive return
1078 from the read() function. If the client had disconnected by this time,
1079 the result was a log entry for a synchronization error with an empty
1080 string after "input=" when read() returned zero. If read() returned -1
1081 (an event I could not check), uninitialized data bytes were printed.
1082 There were reports of junk text (parts of files, etc) appearing after
1083 "input=".
1084
54cdb463
PH
1085PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1086
cf00dad6
PH
1087PH/22 Added support for macro redefinition, and (re)definition in between
1088 driver and ACL definitions.
1089
acb1b346
PH
1090PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1091 forgetting to use the resulting value; it was using the unexpanded value.
1092
c5ddb310
PH
1093PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1094 hadn't been configured. The fix is from Juergen Kreileder, who
1095 understands it better than I do:
1096
1097 "Here's what I see happening with three configured cyrus_sasl
1098 authenticators configured (plain, login, cram-md5):
1099
1100 On startup auth_cyrus_sasl_init() gets called for each of these.
1101 This means three calls to sasl_listmech() without a specified mech_list.
1102 => SASL tests which mechs of all available mechs actually work
1103 => three warnings about OTP not working
1104 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1105
1106 With the patch, sasl_listmech() also gets called three times. But now
1107 SASL's mech_list option is set to the server_mech specified in the the
1108 authenticator. Or in other words, the answer from sasl_listmech()
1109 gets limited to just the mech you're testing for (which is different
1110 for each call.)
1111 => the return list contains just 'plain' or 'login', 'cram-md5' or
1112 nothing depending on the value of ob->server_mech.
1113
1114 I've just tested the patch: Authentication still works fine,
1115 unavailable mechs specified in the exim configuration are still
1116 caught, and the auth.log warnings about OTP are gone."
1117
31619da6
PH
1118PH/25 When debugging is enabled, the contents of the command line are added
1119 to the debugging output, even when log_selector=+arguments is not
1120 specified.
1121
bebaf0fc
PH
1122PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1123 answer is "GNU", and only if the return is "GNU/something" is the answer
1124 "Linux".
1125
475fe28a
PH
1126PH/27 $acl_verify_message is now set immediately after the failure of a
1127 verification in an ACL, and so is available in subsequent modifiers. In
1128 particular, the message can be preserved by coding like this:
1129
1130 warn !verify = sender
1131 set acl_m0 = $acl_verify_message
1132
1133 Previously, $acl_verify_message was set only while expanding "message"
1134 and "log_message" when a very denied access.
1135
7e8bec7a
PH
1136PH/28 Modified OS/os.c-Linux with
1137
1138 -#ifndef OS_LOAD_AVERAGE
1139 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1140
1141 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1142 nomenclature these days.)
1143
e4a89c47
PH
1144PH/29 Installed patch from the Sieve maintainer that adds the options
1145 sieve_useraddress and sieve_subaddress to the redirect router.
1146
5ca2a9a1
PH
1147PH/30 In these circumstances:
1148 . Two addresses routed to the same list of hosts;
1149 . First host does not offer TLS;
1150 . First host accepts first address;
1151 . First host gives temporary error to second address;
1152 . Second host offers TLS and a TLS session is established;
1153 . Second host accepts second address.
1154 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1155 and peerdn, if requested) that were in fact used only for the second
1156 address.
7e8bec7a 1157
c688b954
PH
1158PH/31 When doing a callout as part of verifying an address, Exim was not paying
1159 attention to any local part prefix or suffix that was matched by the
1160 router that accepted the address. It now behaves in the same way as it
1161 does for delivery: the affixes are removed from the local part unless
1162 rcpt_include_affixes is set on the transport.
1163
fed77020
PH
1164PH/32 Add the sender address, as F=<...>, to the log line when logging a
1165 timeout during the DATA phase of an incoming message.
1166
7fe1560f
PH
1167PH/33 Sieve envelope tests were broken for match types other than :is. I have
1168 applied a patch sanctioned by the Sieve maintainer.
c688b954 1169
ebb6e6d5
PH
1170PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1171 the uid or gid is negative. A case of a negative gid caused this to be
1172 noticed. The fix allows for either to be negative.
1173
9c4e8f60
PH
1174PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1175 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1176 overlooked.
1177
1178PH/36 The change PH/12 above was broken. Fixed it.
1179
d7174846
PH
1180PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1181 the grounds that routing the same address twice would always produce the
1182 same answer. This might have been true once, but it is certainly no
1183 longer true now. Routing a child address may depend on the previous
1184 routing that produced that child. Some complicated redirection strategies
1185 went wrong when messages had multiple recipients, and made Exim's
1186 behaviour dependent on the order in which the addresses were given.
1187
1188 I have moved the duplicate checking until after the routing is complete.
1189 Exim scans the addresses that are assigned to local and remote
1190 transports, and removes any duplicates. This means that more work will be
1191 done, as duplicates will always all be routed, but duplicates are
1192 presumably rare, so I don't expect this is of any significance.
1193
1194 For deliveries to pipes, files, and autoreplies, the duplicate checking
1195 still happens during the routing process, since they are not going to be
1196 routed further.
1197
cfe75fc3
PH
1198PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1199 It corrects a timeout issue with spamd. This is Ian's comment: "The
1200 background is that sometimes spamd either never reads data from a
1201 connection it has accepted, or it never writes response data. The exiscan
1202 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1203 blindly assumes that writes won't block so it may never time out."
1204
be22d70e
PH
1205PH/39 Allow G after quota size as well as K and M.
1206
0612b098
PH
1207PH/40 The value set for $authenticated_id in an authenticator may not contain
1208 binary zeroes or newlines because the value is written to log lines and
1209 to spool files. There was no check on this. Now the value is run through
1210 the string_printing() function so that such characters are converted to
1211 printable escape sequences.
1212
2e0c1448
PH
1213PH/41 $message_linecount is a new variable that contains the total number of
1214 lines in the message. Compare $body_linecount, which is the count for the
1215 body only.
1216
447d236c
PH
1217PH/42 Exim no longer gives details of delivery errors for specific addresses in
1218 bounce and delay warning messages, except in certain special cases, which
1219 are as follows:
1220
1221 (a) An SMTP error message from a remote host;
1222 (b) A message specified in a :fail: redirection;
1223 (c) A message specified in a "fail" command in a system filter;
1224 (d) A message specified in a FAIL return from the queryprogram router;
1225 (e) A message specified by the cannot_route_message router option.
1226
1227 In these cases only, Exim does include the error details in bounce and
1228 warning messages. There are also a few cases where bland messages such
1229 as "unrouteable address" or "local delivery error" are given.
1230
d20976dc
PH
1231PH/43 $value is now also set for the "else" part of a ${run expansion.
1232
f656d135
PH
1233PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1234 being worked on, but at least Exim now implements the latest version to
1235 play with."
1236
2e2a30b4
PH
1237PH/45 In a pipe transport, although a timeout while waiting for the pipe
1238 process to complete was treated as a delivery failure, a timeout while
1239 writing the message to the pipe was logged, but erroneously treated as a
1240 successful delivery. Such timeouts include transport filter timeouts. For
1241 consistency with the overall process timeout, these timeouts are now
1242 treated as errors, giving rise to delivery failures by default. However,
1243 there is now a new Boolean option for the pipe transport called
1244 timeout_defer, which, if set TRUE, converts the failures into defers for
1245 both kinds of timeout. A transport filter timeout is now identified in
1246 the log output.
1247
9176e9f0
PH
1248PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1249 systems where "make" and "gmake" are different, calling "gmake" at top
1250 level broke things. I've arranged for the value of $(MAKE) to be passed
1251 from the Makefile to this script so that it can call the same version of
1252 "make".
1253
7982096b 1254
bbe902f0
PH
1255A note about Exim versions 4.44 and 4.50
1256----------------------------------------
1257
1258Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1259changes of various kinds. As a consequence, a big documentation update was
1260needed. This delayed the release for rather longer than seemed good, especially
1261in the light of a couple of (minor) security issues. Therefore, the changes
1262that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1263release. So 4.44 and 4.50 are in effect two different branches that both start
1264from 4.43.
1265
1266I have left the 4.50 change log unchanged; it contains all the changes since
12674.43. The change log for 4.44 is below; many of its items are identical to
1268those for 4.50. This seems to be the most sensible way to preserve the
1269historical information.
1270
1271
f7b63901 1272Exim version 4.50
495ae4b0
PH
1273-----------------
1274
5fe762f6
PH
1275 1. Minor wording change to the doc/README.SIEVE file.
1276
139059f6 1277 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1278 computation of the current number of files was incorrect.
495ae4b0 1279
7086e875
PH
1280 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1281 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1282 place.
1283
35af9f61
PH
1284 4. Give more explanation in the error message when the command for a transport
1285 filter fails to execute.
1286
b668c215
PH
1287 5. There are several places where Exim runs a non-Exim command in a
1288 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1289 was being done only for the command run by the queryprogram router. It is
1290 now done for all such subprocesses. The other cases are: ${run, transport
1291 filters, and the commands run by the lmtp and pipe transports.
1292
a494b1e1
PH
1293 6. Added CONFIGURE_GROUP build-time option.
1294
1295 7. Some older OS have a limit of 256 on the maximum number of file
1296 descriptors. Exim was using setrlimit() to set 1000 as a large value
1297 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1298 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1299
c5fcb476
PH
1300 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1301 was an oversight, and furthermore, ever since the addition of extra
1302 controls (e.g. 4.43/32), the checks on when to allow different forms of
1303 "control" were broken. There should now be diagnostics for all cases when a
1304 control that does not make sense is encountered.
1305
69358f02
PH
1306 9. Added the /retain_sender option to "control=submission".
1307
5be20824
PH
130810. $recipients is now available in the predata ACL (oversight).
1309
eb2c0248
PH
131011. Tidy the search cache before the fork to do a delivery from a message
1311 received from the command line. Otherwise the child will trigger a lookup
1312 failure and thereby defer the delivery if it tries to use (for example) a
1313 cached ldap connection that the parent has called unbind on.
1314
2a3eea10
PH
131512. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1316 of $address_data from the recipient verification was clobbered by the
1317 sender verification.
1318
131913. The value of address_data from a sender verification is now available in
1320 $sender_address_data in subsequent conditions in the ACL statement.
1321
23c7ff99
PH
132214. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1323
4deaf07d
PH
132415. Added a new option "connect=<time>" to callout options, to set a different
1325 connection timeout.
1326
926e1192
PH
132716. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1328 was its contents. (It was OK if the option was not defined at all.)
1329
650edc6f
PH
133017. A "Completed" log line is now written for messages that are removed from
1331 the spool by the -Mrm option.
1332
2c7db3f5
PH
133318. New variables $sender_verify_failure and $recipient_verify_failure contain
1334 information about exactly what failed.
1335
3d235903
PH
133619. Added -dd to debug only the daemon process.
1337
7c7ad977
PH
133820. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1339 handles timeouts, both on the server side and network timeouts. Renamed the
1340 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1341
981756db
PH
134221. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1343 It is now set to "smtps".
1344
d4eb88df
PH
134522. $host_address is now set to the target address during the checking of
1346 ignore_target_hosts.
1347
134823. When checking ignore_target_hosts for an ipliteral router, no host name was
1349 being passed; this would have caused $sender_host_name to have been used if
1350 matching the list had actually called for a host name (not very likely,
1351 since this list is usually IP addresses). A host name is now passed as
1352 "[x.x.x.x]".
1353
7d468ab8
PH
135424. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1355 code that specifies a non-restarting handler (typically sigaction() in
1356 modern systems) in an attempt to fix a rare and obscure crash bug.
1357
135825. Narrowed the window for a race in the daemon that could cause it to ignore
1359 SIGCHLD signals. This is not a major problem, because they are used only to
1360 wake it up if nothing else does.
1361
62c0818f
PH
136226. A malformed maildirsize file could cause Exim to calculate negative values
1363 for the mailbox size or file count. Odd effects could occur as a result.
1364 The maildirsize information is now recalculated if the size or filecount
1365 end up negative.
1366
26034054
PH
136727. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1368 support for a long time. Removed HAVE_SYS_VFS_H.
1369
af66f652
PH
137028. Installed the latest version of exipick from John Jetmore.
1371
90af77f4
PH
137229. In an address list, if the pattern was not a regular expression, an empty
1373 subject address (from a bounce message) matched only if the pattern was an
1374 empty string. Non-empty patterns were not even tested. This was the wrong
1375 because it is perfectly reasonable to use an empty address as part of a
1376 database query. An empty address is now tested by patterns that are
1377 lookups. However, all the other forms of pattern expect the subject to
1378 contain a local part and a domain, and therefore, for them, an empty
1379 address still always fails if the pattern is not itself empty.
1380
d8ef3577
PH
138130. Exim went into a mad DNS loop when attempting to do a callout where the
1382 host was specified on an smtp transport, and looking it up yielded more
1383 than one IP address.
1384
5cb8cbc6
PH
138531. Re-factored the code for checking spool and log partition space into a
1386 function that finds that data and another that does the check. The former
1387 is then used to implement four new variables: $spool_space, $log_space,
1388 $spool_inodes, and $log_inodes.
1389
14702f5b
PH
139032. The RFC2047 encoding function was originally intended for short strings
1391 such as real names; it was not keeping to the 75-character limit for
1392 encoded words that the RFC imposes. It now respects the limit, and
1393 generates multiple encoded words if necessary. To be on the safe side, I
1394 have increased the buffer size for the ${rfc2047: expansion operator from
1395 1024 to 2048 bytes.
1396
063b1e99
PH
139733. It is now permitted to omit both strings after an "if" condition; if the
1398 condition is true, the result is "true". As before, when the second string
1399 is omitted, a false condition yields an empty string. This makes it less
1400 cumbersome to write custom ACL and router conditions.
1401
652e1b65
PH
140234. Failure to deliver a bounce message always caused it to be frozen, even if
1403 there was an errors_to setting on the router. The errors_to setting is now
1404 respected.
1405
6f0c9a4f
PH
140635. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1407 canonical form (fully expanded) before being placed in
1408 $sender_host_address.
1409
33397d19
PH
141036. The table in the code that translates DNS record types into text (T_A to
1411 "A" for instance) was missing entries for NS and CNAME. It is just possible
1412 that this could have caused confusion if both these types were looked up
1413 for the same domain, because the text type is used as part of Exim's
1414 per-process caching. But the chance of anyone hitting this buglet seems
1415 very small.
1416
7bb56e1f
PH
141737. The dnsdb lookup has been extended in a number of ways.
1418
1419 (1) There is a new type, "zns", which walks up the domain tree until it
1420 finds some nameserver records. It should be used with care.
1421
ea3bc19b
PH
1422 (2) There is a new type, "mxh", which is like "mx" except that it returns
1423 just the host names, not the priorities.
1424
1425 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1426 looked up. The behaviour when one of the lookups defers can be
1427 controlled by a keyword.
7bb56e1f 1428
ea3bc19b 1429 (4) It is now possible to specify the separator character for use when
7bb56e1f 1430 multiple records are returned.
33397d19 1431
0bcb2a0e
PH
143238. The dnslists ACL condition has been extended: it is now possible to supply
1433 a list of IP addresses and/or domains to be looked up in a particular DNS
1434 domain.
1435
2ac0e484
PH
143639. Added log_selector=+queue_time_overall.
1437
4e1fde53
PH
143840. When running the queue in the test harness, wait just a tad after forking a
1439 delivery process, to get repeatability of debugging output.
1440
de365ded
PH
144141. Include certificate and key file names in error message when GnuTLS fails
1442 to set them up, because the GnuTLS error message doesn't include the name
1443 of the failing file when there is a problem reading it.
1444
f05da2e8
PH
144542. Allow both -bf and -bF in the same test run.
1446
d6453af2
PH
144743. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1448
f7b63901
PH
144944. The "Exiscan patch" is now merged into the mainline Exim source.
1450
145145. Sometimes the final signoff response after QUIT could fail to get
1452 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1453 < 0 before doing a fflush(). This bug looks as though it goes back to the
1454 introduction of TLS in release 3.20, but "sometimes" must have been rare
1455 because the tests only now provoked it.
1456
a444213a
PH
145746. Reset the locale to "C" after calling embedded Perl, in case it was changed
1458 (this can affect the format of dates).
1459
0ec020ea
PH
146047. exim_tidydb, when checking for the continued existence of a message for
1461 which it has found a message-specific retry record, was not finding
1462 messages that were in split spool directories. Consequently, it was
1463 deleting retry records that should have stayed in existence.
1464
b1206957
PH
146548. Steve fixed some bugs in eximstats.
1466
146749. The SPA authentication driver was not abandoning authentication and moving
1468 on to the next authenticator when an expansion was forced to fail,
1469 contradicting the general specification for all authenticators. Instead it
1470 was generating a temporary error. It now behaves as specified.
1471
26dd5a95
PH
147250. The default ordering of permitted cipher suites for GnuTLS was pessimal
1473 (the order specifies the preference for clients). The order is now AES256,
1474 AES128, 3DES, ARCFOUR128.
1475
343b2385
PH
147651. Small patch to Sieve code - explicitly set From: when generating an
1477 autoreply.
1478
1c5466b9
PH
147952. Exim crashed if a remote delivery caused a very long error message to be
1480 recorded - for instance if somebody sent an entire SpamAssassin report back
1481 as a large number of 550 error lines. This bug was coincidentally fixed by
1482 increasing the size of one of Exim's internal buffers (big_buffer) that
1483 happened as part of the Exiscan merge. However, to be on the safe side, I
1484 have made the code more robust (and fixed the comments that describe what
1485 is going on).
1486
55ee9ee3
PH
148753. Now that there can be additional text after "Completed" in log lines (if
1488 the queue_time_overall log selector is set), a one-byte patch to exigrep
1489 was needed to allow it to recognize "Completed" as not the last thing in
1490 the line.
1491
d38f8232
PH
149254. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1493 patch that reportedly fixes this has been added. I am not expert enough to
1494 create a test for it. This is what the patch creator wrote:
1495
1496 "I found a little strange behaviour of ldap code when working with
1497 Windows 2003 AD Domain, where users was placed in more than one
1498 Organization Units. When I tried to give exim partial DN, the exit code
1499 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1500 But simultaneously result of request was absolutely normal ldap result,
1501 so I produce this patch..."
1502
3295e65b
PH
1503 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1504 REFERENCE, so I have modified the code to exclude the patch when that macro
1505 is not defined.
1506
7102e136
PH
150755. Some experimental protocols are using DNS PTR records for new purposes. The
1508 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1509 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1510 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1511 CAN-2005-0021
7102e136 1512
3ca0ba97
PH
151356. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1514
c2bcbe20
PH
151557. Double the size of the debug message buffer (to 2048) so that more of very
1516 long debug lines gets shown.
1517
18ce445d
PH
151858. The exicyclog utility now does better if the number of log files to keep
1519 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1520
1f5b4c3d
PH
152159. Two changes related to the smtp_active_hostname option:
1522
1523 (1) $smtp_active_hostname is now available as a variable.
1524 (2) The default for smtp_banner uses $smtp_active_hostname instead
1525 of $primary_hostname.
1526
b975ba52
PH
152760. The host_aton() function is supposed to be passed a string that is known
1528 to be a valid IP address. However, in the case of IPv6 addresses, it was
1529 not checking this. This is a hostage to fortune. Exim now panics and dies
1530 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1531 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1532 components; fortuitously, this particular loophole had already been fixed
1533 by change 4.50/55 above.
1534
1535 If there are any other similar loopholes, the new check in host_aton()
1536 itself should stop them being exploited. The report I received stated that
1537 data on the command line could provoke the exploit when Exim was running as
1538 exim, but did not say which command line option was involved. All I could
1539 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1540 running as the user.
ea3a6f44 1541 CAN-2005-0021
85b87bc2
PH
1542
154361. There was a buffer overflow vulnerability in the SPA authentication code
1544 (which came originally from the Samba project). I have added a test to the
1545 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1546 CAN-2005-0022
b975ba52 1547
17ffcae7
PH
154862. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1549 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1550
d95f9fdb
PH
155163. The daemon start-up calls getloadavg() while still root for those OS that
1552 need the first call to be done as root, but it missed one case: when
1553 deliver_queue_load_max is set with deliver_drop_privilege. This is
1554 necessary for the benefit of the queue runner, because there is no re-exec
1555 when deliver_drop_privilege is set.
1556
86b8287f
PH
155764. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1558 This has been fixed.
1559
60dc5e56
PH
156065. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1561 was in use, was not putting the data itself into the right store pool;
1562 consequently, it could be overwritten for a subsequent message in the same
1563 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1564 the caching.)
1565
533244af
PH
156666. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1567
a5a28604
PH
156867. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1569 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1570 the function were treating the return as a boolean value, which happened to
1571 work because 0=false and not-0=true, but is not correct code.
1572
7e634d24
PH
157368. The host_aton() function was not handling scoped IPv6 addresses (those
1574 with, for example, "%eth0" on the end) correctly.
1575
3e11c26b
PH
157669. Fixed some compiler warnings in acl.c for the bitmaps specified with
1577 negated items (that is, ~something) in unsigned ints. Some compilers
1578 apparently mutter when there is no cast.
1579
6729cf78
PH
158070. If an address verification called from an ACL failed, and did not produce a
1581 user-specific message (i.e. there was only a "system" message), nothing was
1582 put in $acl_verify_message. In this situation, it now puts the system
1583 message there.
1584
00f00ca5
PH
158571. Change 4.23/11 added synchronization checking at the start of an SMTP
1586 session; change 4.31/43 added the unwanted input to the log line - except
1587 that it did not do this in the start of session case. It now does.
1588
c9bdd01c
PH
158972. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1590 This is wrong and can cause the other end to generate a synchronization
1591 error if it is another Exim or anything else that does the synchronization
1592 check. A QUIT command is no longer sent after a timeout.
1593
d43194df
PH
159473. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1595 during host lookups.
1596
fe5b5d0b
PH
159774. The defer_ok option of callout verification was not working if it was used
1598 when verifying addresses in header lines, that is, for this case:
1599
1600 verify = header_sender/callout=defer_ok
1601
76a2d7ba
PH
160275. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1603 those file descriptors could be used for SMTP connections. If anything
1604 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1605 could be sent to the SMTP client, causing chaos. The daemon now opens
1606 stdin, stdout, and stderr to /dev/null when it puts itself into the
1607 background.
1608
160976. Arrange for output from Perl's "warn" command to be written to Exim's main
1610 log by default. The user can override this with suitable Perl magic.
1611
04f7d5b9
PH
161277. The use of log_message on a "discard" ACL verb, which is supposed to add to
1613 the log message when discard triggers, was not working for the DATA ACL or
1614 for the non-SMTP ACL.
1615
bc60667e
PH
161678. Error message wording change in sieve.c.
1617
bb6e88ff
PH
161879. If smtp_accept_max_per_host was set, the number of connections could be
1619 restricted to fewer than expected, because the daemon was trying to set up
1620 a new connection before checking whether the processes handling previous
1621 connections had finished. The check for completed processes is now done
1622 earlier. On busy systems, this bug wouldn't be noticed because something
1623 else would have woken the daemon, and it would have reaped the completed
1624 process earlier.
1625
1e70f85b
PH
162680. If a message was submitted locally by a user whose login name contained one
1627 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1628 It caused a spool format error. I have fixed the spool reading code. A
1629 related problem was that the "from" clause in the Received: line became
1630 illegal because of the space(s). It is now covered by ${quote_local_part.
1631
163281. Included the latest eximstats from Steve (adds average sizes to HTML Top
1633 tables).
1634
4e01f9d6
PH
163582. Updated OS/Makefile-AIX as per message from Mike Meredith.
1636
1ee1cef2
PH
163783. Patch from Sieve maintainer to fix unterminated string problem in
1638 "vacation" handling.
1639
6e2b4ccc
PH
164084. Some minor changes to the Linux configuration files to help with other
1641 OS variants using glibc.
1642
8e669ac1
PH
164385. One more patch for Sieve to update vacation handling to latest spec.
1644
495ae4b0 1645
bbe902f0
PH
1646----------------------------------------------------
1647See the note above about the 4.44 and 4.50 releases.
1648----------------------------------------------------
1649
1650
1651Exim version 4.44
1652-----------------
1653
1654 1. Change 4.43/35 introduced a bug that caused file counts to be
1655 incorrectly computed when quota_filecount was set in an appendfile
1656 transport
1657
1658 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1659 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1660 place.
1661
1662 3. Give more explanation in the error message when the command for a transport
1663 filter fails to execute.
1664
1665 4. There are several places where Exim runs a non-Exim command in a
1666 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1667 was being done only for the command run by the queryprogram router. It is
1668 now done for all such subprocesses. The other cases are: ${run, transport
1669 filters, and the commands run by the lmtp and pipe transports.
1670
1671 5. Some older OS have a limit of 256 on the maximum number of file
1672 descriptors. Exim was using setrlimit() to set 1000 as a large value
1673 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1674 systems. I've change it so that if it can't get 1000, it tries for 256.
1675
1676 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1677 was an oversight, and furthermore, ever since the addition of extra
1678 controls (e.g. 4.43/32), the checks on when to allow different forms of
1679 "control" were broken. There should now be diagnostics for all cases when a
1680 control that does not make sense is encountered.
1681
1682 7. $recipients is now available in the predata ACL (oversight).
1683
1684 8. Tidy the search cache before the fork to do a delivery from a message
1685 received from the command line. Otherwise the child will trigger a lookup
1686 failure and thereby defer the delivery if it tries to use (for example) a
1687 cached ldap connection that the parent has called unbind on.
1688
1689 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1690 of $address_data from the recipient verification was clobbered by the
1691 sender verification.
1692
169310. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1694 was its contents. (It was OK if the option was not defined at all.)
1695
169611. A "Completed" log line is now written for messages that are removed from
1697 the spool by the -Mrm option.
1698
169912. $host_address is now set to the target address during the checking of
1700 ignore_target_hosts.
1701
170213. When checking ignore_target_hosts for an ipliteral router, no host name was
1703 being passed; this would have caused $sender_host_name to have been used if
1704 matching the list had actually called for a host name (not very likely,
1705 since this list is usually IP addresses). A host name is now passed as
1706 "[x.x.x.x]".
1707
170814. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1709 code that specifies a non-restarting handler (typically sigaction() in
1710 modern systems) in an attempt to fix a rare and obscure crash bug.
1711
171215. Narrowed the window for a race in the daemon that could cause it to ignore
1713 SIGCHLD signals. This is not a major problem, because they are used only to
1714 wake it up if nothing else does.
1715
171616. A malformed maildirsize file could cause Exim to calculate negative values
1717 for the mailbox size or file count. Odd effects could occur as a result.
1718 The maildirsize information is now recalculated if the size or filecount
1719 end up negative.
1720
172117. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1722 support for a long time. Removed HAVE_SYS_VFS_H.
1723
ea3a6f44 172418. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1725
172619. Allow an empty sender to be matched against a lookup in an address list.
1727 Previously the only cases considered were a regular expression, or an
1728 empty pattern.
1729
173020. Exim went into a mad DNS lookup loop when doing a callout where the
1731 host was specified on the transport, if the DNS lookup yielded more than
1732 one IP address.
1733
ea3a6f44
NM
173421. The RFC2047 encoding function was originally intended for short strings
1735 such as real names; it was not keeping to the 75-character limit for
1736 encoded words that the RFC imposes. It now respects the limit, and
1737 generates multiple encoded words if necessary. To be on the safe side, I
1738 have increased the buffer size for the ${rfc2047: expansion operator from
1739 1024 to 2048 bytes.
bbe902f0 1740
ea3a6f44
NM
174122. Failure to deliver a bounce message always caused it to be frozen, even if
1742 there was an errors_to setting on the router. The errors_to setting is now
1743 respected.
bbe902f0
PH
1744
174523. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1746 canonical form (fully expanded) before being placed in
1747 $sender_host_address.
1748
174924. Updated eximstats to version 1.33
1750
ea3a6f44
NM
175125. Include certificate and key file names in error message when GnuTLS fails
1752 to set them up, because the GnuTLS error message doesn't include the name
1753 of the failing file when there is a problem reading it.
bbe902f0
PH
1754
175526. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1756 As per change 25.
bbe902f0 1757
ea3a6f44
NM
175827. Reset the locale to "C" after calling embedded Perl, in case it was changed
1759 (this can affect the format of dates).
bbe902f0 1760
ea3a6f44
NM
176128. exim_tidydb, when checking for the continued existence of a message for
1762 which it has found a message-specific retry record, was not finding
1763 messages that were in split spool directories. Consequently, it was
1764 deleting retry records that should have stayed in existence.
bbe902f0
PH
1765
176629. eximstats updated to version 1.35
1767 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1768 1.35 - bugfix such that pie charts by volume are generated correctly
1769
ea3a6f44
NM
177030. The SPA authentication driver was not abandoning authentication and moving
1771 on to the next authenticator when an expansion was forced to fail,
1772 contradicting the general specification for all authenticators. Instead it
1773 was generating a temporary error. It now behaves as specified.
bbe902f0 1774
ea3a6f44
NM
177531. The default ordering of permitted cipher suites for GnuTLS was pessimal
1776 (the order specifies the preference for clients). The order is now AES256,
1777 AES128, 3DES, ARCFOUR128.
bbe902f0 1778
ea3a6f44
NM
177931. Small patch to Sieve code - explicitly set From: when generating an
1780 autoreply.
bbe902f0 1781
ea3a6f44
NM
178232. Exim crashed if a remote delivery caused a very long error message to be
1783 recorded - for instance if somebody sent an entire SpamAssassin report back
1784 as a large number of 550 error lines. This bug was coincidentally fixed by
1785 increasing the size of one of Exim's internal buffers (big_buffer) that
1786 happened as part of the Exiscan merge. However, to be on the safe side, I
1787 have made the code more robust (and fixed the comments that describe what
1788 is going on).
bbe902f0 1789
ea3a6f44
NM
179033. Some experimental protocols are using DNS PTR records for new purposes. The
1791 keys for these records are domain names, not reversed IP addresses. The
1792 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1793 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1794 CAN-2005-0021
1795
ea3a6f44
NM
179634. The host_aton() function is supposed to be passed a string that is known
1797 to be a valid IP address. However, in the case of IPv6 addresses, it was
1798 not checking this. This is a hostage to fortune. Exim now panics and dies
1799 if the condition is not met. A case was found where this could be provoked
1800 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1801 components; fortuitously, this particular loophole had already been fixed
1802 by change 4.50/55 or 4.44/33 above.
1803
1804 If there are any other similar loopholes, the new check in host_aton()
1805 itself should stop them being exploited. The report I received stated that
1806 data on the command line could provoke the exploit when Exim was running as
1807 exim, but did not say which command line option was involved. All I could
1808 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1809 running as the user.
bbe902f0
PH
1810 CAN-2005-0021
1811
ea3a6f44
NM
181235. There was a buffer overflow vulnerability in the SPA authentication code
1813 (which came originally from the Samba project). I have added a test to the
1814 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1815 CAN-2005-0022
1816
ea3a6f44
NM
181736. The daemon start-up calls getloadavg() while still root for those OS that
1818 need the first call to be done as root, but it missed one case: when
1819 deliver_queue_load_max is set with deliver_drop_privilege. This is
1820 necessary for the benefit of the queue runner, because there is no re-exec
1821 when deliver_drop_privilege is set.
bbe902f0 1822
ea3a6f44
NM
182337. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1824 was in use, was not putting the data itself into the right store pool;
1825 consequently, it could be overwritten for a subsequent message in the same
1826 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1827 the caching.)
bbe902f0 1828
ea3a6f44
NM
182938. Sometimes the final signoff response after QUIT could fail to get
1830 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1831 < 0 before doing a fflush(). This bug looks as though it goes back to the
1832 introduction of TLS in release 3.20, but "sometimes" must have been rare
1833 because the tests only now provoked it.
bbe902f0
PH
1834
1835
495ae4b0
PH
1836Exim version 4.43
1837-----------------
1838
1839 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1840 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1841 Now it returns an integer. A number of calls were still expecting a T/F
1842 return. Fortuitously, in all cases, the tests worked in OK situations,
1843 which is the norm. However, things would have gone wrong on any write
1844 failures on the smtp file descriptor. This function is used when sending
1845 messages over SMTP and also when doing verify callouts.
1846
1847 2. When Exim is called to do synchronous delivery of a locally submitted
1848 message (the -odf or -odi options), it no longer closes stderr before doing
1849 the delivery.
1850
1851 3. Implemented the mua_wrapper option.
1852
1853 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1854
1855 5. Implemented the functions header_remove(), header_testname(),
1856 header_add_at_position(), and receive_remove_recipient(), and exported them
1857 to local_scan().
1858
1859 6. If an ACL "warn" statement specified the addition of headers, Exim already
1860 inserted X-ACL-Warn: at the start if there was no header name. However, it
1861 was not making this test for the second and subsequent header lines if
1862 there were newlines in the string. This meant that an invalid header could
1863 be inserted if Exim was badly configured.
1864
1865 7. Allow an ACL "warn" statement to add header lines at the start or after all
1866 the Received: headers, as well as at the end.
1867
1868 8. Added the rcpt_4xx retry error code.
1869
1870 9. Added postmaster_mailfrom=xxx to callout verification option.
1871
187210. Added mailfrom=xxxx to the callout verification option, for verify=
1873 header_sender only.
1874
187511. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1876 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1877
187812. Inserted some casts to stop certain compilers warning when using pointer
1879 differences as field lengths or precisions in printf-type calls (mostly
1880 affecting debugging statements).
1881
188213. Added optional readline() support for -be (dynamically loaded).
1883
188414. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1885 same clock tick as a message's arrival, so that its received time was the
1886 same as the "first fail" time on the retry record, and that message
1887 remained on the queue past the ultimate address timeout, every queue runner
1888 would try a delivery (because it was past the ultimate address timeout) but
1889 after another failure, the ultimate address timeout, which should have then
1890 bounced the address, did not kick in. This was a "< instead of <=" error;
1891 in most cases the first failure would have been in the next clock tick
1892 after the received time, and all would be well.
1893
189415. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1895 being recognized when the domain list was tested by the match_domain
1896 condition in an expansion string.
1897
189816. Added the ${str2b64: operator.
1899
190017. Exim was always calling setrlimit() to set a large limit for the number of
1901 processes, without checking whether the existing limit was already
1902 adequate. (It did check for the limit on file descriptors.) Furthermore,
1903 errors from getrlimit() and setrlimit() were being ignored. Now they are
1904 logged to the main and panic logs, but Exim does carry on, to try to do its
1905 job under whatever limits there are.
1906
190718. Imported PCRE 5.0.
1908
190919. Trivial typo in log message " temporarily refused connection" (the leading
1910 space).
1911
191220. If the log selector return_path_on_delivery was set and an address was
1913 redirected to /dev/null, the delivery process crashed because it assumed
1914 that a return path would always be set for a "successful" delivery. In this
1915 case, the whole delivery is bypassed as an optimization, and therefore no
1916 return path is set.
1917
191821. Internal re-arrangement: the function for sending a challenge and reading
1919 a response while authentication was assuming a zero-terminated challenge
1920 string. It's now changed to take a pointer and a length, to allow for
1921 binary data in such strings.
1922
192322. Added the cyrus_sasl authenticator (code supplied by MBM).
1924
192523. Exim was not respecting finduser_retries when seeking the login of the
1926 uid under which it was called; it was always trying 10 times. (The default
1927 setting of finduser_retries is zero.) Also, it was sleeping after the final
1928 failure, which is pointless.
1929
193024. Implemented tls_on_connect_ports.
1931
193225. Implemented acl_smtp_predata.
1933
193426. If the domain in control=submission is set empty, Exim assumes that the
1935 authenticated id is a complete email address when it generates From: or
1936 Sender: header lines.
1937
193827. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1939 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1940 chown and chgrp in /bin and hostname in /usr/bin.
1941
194228. Exim was keeping the "process log" file open after each use, just as it
1943 does for the main log. This opens the possibility of it remaining open for
1944 long periods when the USR1 signal hits a daemon. Occasional processlog
1945 errors were reported, that could have been caused by this. Anyway, it seems
1946 much more sensible not to leave this file open at all, so that is what now
1947 happens.
1948
194929. The long-running daemon process does not normally write to the log once it
1950 has entered its main loop, and it closes the log before doing so. This is
1951 so that log files can straightforwardly be renamed and moved. However,
1952 there are a couple of unusual error situations where the daemon does write
1953 log entries, and I had neglected to close the log afterwards.
1954
195530. The text of an SMTP error response that was received during a remote
1956 delivery was being truncated at 512 bytes. This is too short for some of
1957 the long messages that one sometimes sees. I've increased the limit to
1958 1024.
1959
196031. It is now possible to make retry rules that apply only when a message has a
1961 specific sender, in particular, an empty sender.
1962
196332. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1964 it possible to be selective about when SMTP synchronization is enforced.
1965
196633. Added "control = caseful_local_part" and "control = "caselower_local_part".
1967
196832. Implemented hosts_connection_nolog.
1969
197033. Added an ACL for QUIT.
1971
197234. Setting "delay_warning=" to disable warnings was not working; it gave a
1973 syntax error.
1974
197535. Added mailbox_size and mailbox_filecount to appendfile.
1976
197736. Added control = no_multiline_responses to ACLs.
1978
197937. There was a bug in the logic of the code that waits for the clock to tick
1980 in the case where the clock went backwards by a substantial amount such
1981 that the microsecond fraction of "now" was more than the microsecond
1982 fraction of "then" (but the whole seconds number was less).
1983
198438. Added support for the libradius Radius client library this is found on
1985 FreeBSD (previously only the radiusclient library was supported).
1986
1987
1988Exim version 4.42
1989-----------------
1990
1991 1. When certain lookups returned multiple values in the form name=value, the
1992 quoting of the values was not always being done properly. Specifically:
1993 (a) If the value started with a double quote, but contained no whitespace,
1994 it was not quoted.
1995 (b) If the value contained whitespace other than a space character (i.e.
1996 tabs or newlines or carriage returns) it was not quoted.
1997 This fix has been applied to the mysql and pgsql lookups by writing a
1998 separate quoting function and calling it from the lookup code. The fix
1999 should probably also be applied to nisplus, ibase and oracle lookups, but
2000 since I cannot test any of those, I have not disturbed their existing code.
2001
2002 2. A hit in the callout cache for a specific address caused a log line with no
2003 reason for rejecting RCPT. Now it says "Previous (cached) callout
2004 verification failure".
2005
2006 3. There was an off-by-one bug in the queryprogram router. An over-long
2007 return line was truncated at 256 instead of 255 characters, thereby
2008 overflowing its buffer with the terminating zero. As well as fixing this, I
2009 have increased the buffer size to 1024 (and made a note to document this).
2010
2011 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2012 when Exim is waiting for an SMTP response from a remote server, Exim
2013 restarts its select() call on the socket, thereby resetting its timeout.
2014 This is not a problem when such interrupts are rare. Somebody set up a cron
2015 job to run exiwhat every 2 minutes, which is less than the normal select()
2016 timeout (5 or 10 minutes). This meant that the select() timeout never
2017 kicked in because it was always reset. I have fixed this by comparing the
2018 time when an interrupt arrives with the time at the start of the first call
2019 to select(). If more time than the timeout has elapsed, the interrupt is
2020 treated as a timeout.
2021
2022 5. Some internal re-factoring in preparation for the addition of Sieve
2023 extensions (by MH). In particular, the "personal" test is moved to a
2024 separate function, and given an option for scanning Cc: and Bcc: (which is
2025 not set for Exim filters).
2026
2027 6. When Exim created an email address using the login of the caller as the
2028 local part (e.g. when creating a From: or Sender: header line), it was not
2029 quoting the local part when it contained special characters such as @.
2030
2031 7. Installed new OpenBSD configuration files.
2032
2033 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2034 try to make them clearer.
2035
2036 9. Callout options, other than the timeout value, were being ignored when
2037 verifying sender addresses in header lines. For example, when using
2038
2039 verify = header_sender/callout=no_cache
2040
2041 the cache was (incorrectly) being used.
2042
204310. Added a missing instance of ${EXE} to the exim_install script; this affects
2044 only the Cygwin environment.
2045
204611. When return_path_on_delivery was set as a log selector, if different remote
2047 addresses in the same message used different return paths and parallel
2048 remote delivery occurred, the wrong values would sometimes be logged.
2049 (Whenever a remote delivery process finished, the return path value from
2050 the most recently started remote delivery process was logged.)
2051
205212. RFC 3848 specifies standard names for the "with" phrase in Received: header
2053 lines when AUTH and/or TLS are in use. This is the "received protocol"
2054 field. Exim used to use "asmtp" for authenticated SMTP, without any
2055 indication (in the protocol name) for TLS use. Now it follows the RFC and
2056 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2057 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2058 names appear in log lines as well as in Received: header lines.
2059
206013. Installed MH's patches for Sieve to add the "copy" and "vacation"
2061 extensions, and comparison tests, and to fix some bugs.
2062
206314. Changes to the "personal" filter test:
2064
2065 (1) The test was buggy in that it was just doing the equivalent of
2066 "contains" tests on header lines. For example, if a user's address was
2067 anne@some.where, the "personal" test would incorrectly be true for
2068
2069 To: susanne@some.where
2070
2071 This test is now done by extracting each address from the header in turn,
2072 and checking the entire address. Other tests that are part of "personal"
2073 are now done using regular expressions (for example, to check local parts
2074 of addresses in From: header lines).
2075
2076 (2) The list of non-personal local parts in From: addresses has been
2077 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2078 taken from the Sieve specification recommendations.
2079
2080 (3) If the message contains any header line starting with "List-" it is
2081 treated as non-personal.
2082
2083 (4) The test for "circular" in the Subject: header line has been removed
2084 because it now seems ill-conceived.
2085
208615. Minor typos in src/EDITME comments corrected.
2087
208816. Installed latest exipick from John Jetmore.
2089
209017. If headers_add on a router specified a text string that was too long for
2091 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2092 of string_sprintf() is now avoided.
2093
209418. $message_body_size was not set (it was always zero) when running the DATA
2095 ACL and the local_scan() function.
2096
209719. For the "mail" command in an Exim filter, no default was being set for
2098 the once_repeat time, causing a random time value to be used if "once" was
2099 specified. (If the value happened to be <= 0, no repeat happened.) The
2100 default is now 0s, meaning "never repeat". The "vacation" command was OK
2101 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2102 (I found it when inspecting the code).
2103
210420. There is now an overall timeout for performing a callout verification. It
2105 defaults to 4 times the callout timeout, which applies to individual SMTP
2106 commands during the callout. The overall timeout applies when there is more
2107 than one host that can be tried. The timeout is checked before trying the
2108 next host. This prevents very long delays if there are a large number of
2109 hosts and all are timing out (e.g. when the network connections are timing
2110 out). The value of the overall timeout can be changed by specifying an
2111 additional sub-option for "callout", called "maxwait". For example:
2112
2113 verify = sender/callout=5s,maxwait=20s
2114
211521. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2116 to the end before writing, but this should make it even safer).
2117
211822. Exim was forgetting that it had advertised PIPELINING for the second and
2119 subsequent messages on an SMTP connection. It was also not resetting its
2120 memory on STARTTLS and an internal HELO.
2121
212223. When Exim logs an SMTP synchronization error within a session, it now
2123 records whether PIPELINING has been advertised or not.
2124
212524. Added 3 instances of "(long int)" casts to time_t variables that were being
2126 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2127 rather than long int.
2128
212925. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2130
213126. Added the never_mail option to autoreply.
2132
2133
2134Exim version 4.41
2135-----------------
2136
2137 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2138 crash if the getsockname() call failed; this can happen if a connection is
2139 closed very soon after it is established. The problem was simply in the
2140 order in which certain operations were done, causing Exim to try to write
2141 to the SMTP stream before it had set up the file descriptor. The bug has
2142 been fixed by making things happen in the correct order.
2143
2144
2145Exim version 4.40
2146-----------------
2147
2148 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2149 before the connection was closed, thus losing the rejection response.
2150
2151 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2152 some early Solaris releases, but causes trouble in current releases where
2153 socklen_t is defined.
2154
2155 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2156 always exist.
2157
2158 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2159 configured.
2160
2161 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2162 that releasing the top of it at the end releases what was used for sub-
2163 expansions (unless the block got too big). However, discard this block if
2164 the first thing is a variable or header, so that we can use its block when
2165 it is dynamic (useful for very large $message_headers, for example).
2166
2167 6. Lookups now cache *every* query, not just the most recent. A new, separate
2168 store pool is used for this. It can be recovered when all lookup caches are
2169 flushed. Lookups now release memory at the end of their result strings.
2170 This has involved some general refactoring of the lookup sources.
2171
2172 7. Some code has been added to the store_xxx() functions to reduce the amount
2173 of flapping under certain conditions.
2174
2175 8. log_incoming_interface used to affect only the <= reception log lines. Now
2176 it causes the local interface and port to be added to several more SMTP log
2177 lines, for example "SMTP connection from", and rejection lines.
2178
2179 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2180
218110. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2182
218311. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2184 could be overwritten at the end of the current message (or the start of a
2185 new message if it was set in a HELO ACL). The value is now preserved for
2186 the duration of the SMTP connection.
2187
218812. If a transport had a headers_rewrite setting, and a matching header line
2189 contained an unqualified address, that address was qualified, even if it
2190 did not match any rewriting rules. The underlying bug was that the values
2191 of the flags that permit the existence of unqualified sender and recipient
2192 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2193 non-local messages, and by -bnq for local messages) were not being
2194 preserved with the message after it was received.
2195
219613. When Exim was logging an SMTP synchronization error, it could sometimes log
2197 "next input=" as part of the text comprising the host identity instead of
2198 the correct text. The code was using the same buffer for two different
2199 strings. However, depending on which order the printing function evaluated
2200 its arguments, the bug did not always show up. Under Linux, for example, my
2201 test suite worked just fine.
2202
220314. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2204 doesn't work with some older versions of Perl. It has been changed to "my",
2205 which in any case is probably the better facility to use.
2206
220715. A really picky compiler found some instances of statements for creating
2208 error messages that either had too many or two few arguments for the format
2209 string.
2210
221116. The size of the buffer for calls to the DNS resolver has been increased
2212 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2213 for addresses that have a lot of PTR records. This alleviates a problem; it
2214 does not fully solve it.
2215
221617. A dnsdb lookup for PTR records that receives more data than will fit in the
2217 buffer now truncates the list and logs the incident, which is the same
2218 action as happens when Exim is looking up a host name and its aliases.
2219 Previously in this situation something unpredictable would happen;
2220 sometimes it was "internal error: store_reset failed".
2221
222218. If a server dropped the connection unexpectedly when an Exim client was
2223 using GnuTLS and trying to read a response, the client delivery process
2224 crashed while trying to generate an error log message.
2225
222619. If a "warn" verb in an ACL added multiple headers to a message in a single
2227 string, for example:
2228
2229 warn message = H1: something\nH2: something
2230
2231 the text was added as a single header line from Exim's point of view
2232 though it ended up OK in the delivered message. However, searching for the
2233 second and subsequent header lines using $h_h2: did not work. This has been
2234 fixed. Similarly, if a system filter added multiple headers in this way,
2235 the routers could not see them.
2236
223720. Expanded the error message when iplsearch is called with an invalid key to
2238 suggest using net-iplsearch in a host list.
2239
224021. When running tests using -bh, any delays imposed by "delay" modifiers in
2241 ACLs are no longer actually imposed (and a message to that effect is
2242 output).
2243
224422. If a "gecos" field in a passwd entry contained escaped characters, in
2245 particular, if it contained a \" sequence, Exim got it wrong when building
2246 a From: or a Sender: header from that name. A second bug also caused
2247 incorrect handling when an unquoted " was present following a character
2248 that needed quoting.
2249
225023. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2251 was not being matched caselessly.
2252
225324. Arranged for all hyphens in the exim.8 source to be escaped with
2254 backslashes.
2255
225625. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2257 properly. Recipient callout cache records were still being keyed to include
2258 the sender, even when use_sender was set false. This led to far more
2259 callouts that were necessary. The sender is no longer included in the key
2260 when use_sender is false.
2261
226226. Added "control = submission" modifier to ACLs.
2263
226427. Added the ${base62d: operator to decode base 62 numbers.
2265
226628. dnsdb lookups can now access SRV records.
2267
226829. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2269 the configuration file.
2270
227130. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2272 (-v) mode. This makes the output for a verbose queue run more intelligible.
2273
227431. Added a use_postmaster feature to recipient callouts.
2275
227632. Added the $body_zerocount variable, containing the number of binary zero
2277 bytes in the message body.
2278
227933. The time of last modification of the "new" subdirectory is now used as the
2280 "mailbox time last read" when there is a quota error for a maildir
2281 delivery.
2282
228334. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2284
228535. Added +ignore_unknown as a special item in host lists.
2286
228736. Code for decoding IPv6 addresses in host lists is now included, even if
2288 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2289 address was recognized as an IP address, but was then not correctly decoded
2290 into binary, causing unexpected and incorrect effects when compared with
2291 another IP address.
2292
2293
2294Exim version 4.34
2295-----------------
2296
2297 1. Very minor rewording of debugging text in manualroute to say "list of
2298 hosts" instead of "hostlist".
2299
2300 2. If verify=header_syntax was set, and a header line with an unqualified
2301 address (no domain) and a large number of spaces between the end of the
2302 name and the colon was received, the reception process suffered a buffer
2303 overflow, and (when I tested it) crashed. This was caused by some obsolete
2304 code that should have been removed. The fix is to remove it!
2305
2306 3. When running in the test harness, delay a bit after writing a bounce
2307 message to get a bit more predictability in the log output.
2308
2309 4. Added a call to search_tidyup() just before forking a reception process. In
2310 theory, someone could use a lookup in the expansion of smtp_accept_max_
2311 per_host which, without the tidyup, could leave open a database connection.
2312
2313 5. Added the variables $recipient_data and $sender_data which get set from a
2314 lookup success in an ACL "recipients" or "senders" condition, or a router
2315 "senders" option, similar to $domain_data and $local_part_data.
2316
2317 6. Moved the writing of debug_print from before to after the "senders" test
2318 for routers.
2319
2320 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2321 problems for message scanning, either using a data ACL, or using
2322 local_scan() because the Received: header was not generated till after they
2323 were called (in order to set the time as the time of reception completion).
2324 I have revised the way this works. The header is now generated after the
2325 body is received, but before the ACL or local_scan() are called. After they
2326 are run, the timestamp in the header is updated.
2327
2328
2329Exim version 4.33
2330-----------------
2331
2332 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2333 before starting a queue runner without re-exec. This happened only when
2334 deliver_drop_privilege was set or when the Exim user was set to root. The
2335 effect of the bug was that timeouts during subsequent deliveries caused
2336 crashes instead of being properly handled. The handler is now left at its
2337 default (and expected) setting.
2338
2339 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2340 message, again when deliver_drop_privilege is set or Exim is run as root.
2341 The bug described in (1) was not present in this case, but the tidying up
2342 of the other signals was missing. I have made the two cases consistent.
2343
2344 3. The ignore_target_hosts setting on a manualroute router was being ignored
2345 for hosts that were looked up using the /MX notation.
2346
2347 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2348 in domain lists.
2349
2350 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2351 operated on the sender address. After changing the $sender_address to <>
2352 for the sender address verify, Exim was re-instated it as the original
2353 (before rewriting) address, but remembering that it had rewritten it, so it
2354 wasn't rewriting it again. This bug also had the effect of breaking the
2355 sender address verification caching when the sender address was rewritten.
2356
2357 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2358 This has been changed so that if the ip literal address matches
2359 ignore_target_hosts, the router declines.
2360
2361 7. Added expansion conditions match_domain, match_address, and match_local_
2362 part (NOT match_host).
2363
2364 8. The placeholder for the Received: header didn't have a length field set.
2365
2366 9. Added code to Exim itself and to exim_lock to test for a specific race
2367 condition that could lead to file corruption when using MBX delivery. The
2368 issue is with the lockfile that is created in /tmp. If this file is removed
2369 after a process has opened it but before that process has acquired a lock,
2370 there is the potential for a second process to recreate the file and also
2371 acquire a lock. This could lead to two Exim processes writing to the file
2372 at the same time. The added code performs the same test as UW imapd; it
2373 checks after acquiring the lock that its file descriptor still refers to
2374 the same named file.
2375
237610. The buffer for building added header lines was of fixed size, 8192 bytes.
2377 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2378 when Exim is built.
2379
238011. Added the smtp_active_hostname option. If used, this will typically be made
2381 to depend on the incoming interface address. Because $interface_address is
2382 not set up until the daemon has forked a reception process, error responses
2383 that can happen earlier (such as "too many connections") no longer contain
2384 a host name.
2385
238612. If an expansion in a condition on a "warn" statement fails because a lookup
2387 defers, the "warn" statement is abandoned, and the next ACL statement is
2388 processed. Previously this caused the whole ACL to be aborted.
2389
239013. Added the iplsearch lookup type.
2391
239214. Added ident_timeout as a log selector.
2393
239415. Added tls_certificate_verified as a log selector.
2395
239616. Added a global option tls_require_ciphers (compare the smtp transport
2397 option of the same name). This controls incoming TLS connections.
2398
239917. I finally figured out how to make tls_require_ciphers do a similar thing
2400 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2401 before starting the TLS session.
2402
240318. Tabs are now shown as \t in -bP output.
2404
240519. If the log selector return_path_on_delivery was set, Exim crashed when
2406 bouncing a message because it had too many Received: header lines.
2407
240820. If two routers both had headers_remove settings, and the first one included
2409 a superfluous trailing colon, the final name in the first list and the
2410 first name in the second list were incorrectly joined into one item (with a
2411 colon in the middle).
2412
2413
2414Exim version 4.32
2415-----------------
2416
2417 1. Added -C and -D options to the exinext utility, mainly to make it easier
2418 to include in the automated testing, but these could be helpful when
2419 multiple configurations are in use.
2420
2421 2. The exinext utility was not formatting the output nicely when there was
2422 an alternate port involved in the retry record key, nor when there was a
2423 message id as well (for retries that were specific to a specific message
2424 and a specific host). It was also confused by IPv6 addresses, because of
2425 the additional colons they contain. I have fixed the IPv4 problem, and
2426 patched it up to do a reasonable job for IPv6.
2427
2428 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2429 delivery, the log line now contains "pipelined" if PIPELINING was used.
2430
2431 4. An SMTP transport process used to panic and die if the bind() call to set
2432 an explicit outgoing interface failed. This has been changed; it is now
2433 treated in the same way as a connect() failure.
2434
2435 5. A reference to $sender_host_name in the part of a conditional expansion
2436 that was being skipped was still causing a DNS lookup. This no longer
2437 occurs.
2438
2439 6. The def: expansion condition was not recognizing references to header lines
2440 that used bh_ and bheader_.
2441
2442 7. Added the _cache feature to named lists.
2443
2444 8. The code for checking quota_filecount in the appendfile transport was
2445 allowing one more file than it should have been.
2446
2447 9. For compatibility with Sendmail, the command line option
2448
2449 -prval:sval
2450
2451 is equivalent to
2452
2453 -oMr rval -oMs sval
2454
2455 and sets the incoming protocol and host name (for trusted callers). The
2456 host name and its colon can be omitted when only the protocol is to be set.
2457 Note the Exim already has two private options, -pd and -ps, that refer to
2458 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2459 "s", but I don't think that's a major issue.
2460
246110. A number of refactoring changes to the code, none of which should affect
2462 Exim's behaviour:
2463
2464 (a) The number of logging options was getting close to filling up the
2465 32-bit word that was used as a bit map. I have split them into two classes:
2466 those that are passed in the argument to log_write(), and those that are
2467 only ever tested independently outside of that function. These are now in
2468 separate 32-bit words, so there is plenty of room for expansion again.
2469 There is no change in the user interface or the logging behaviour.
2470
2471 (b) When building, for example, log lines, the code previously used a
2472 macro that called string_cat() twice, in order to add two strings. This is
2473 not really sufficiently general. Furthermore, there was one instance where
2474 it was actually wrong because one of the argument was used twice, and in
2475 one call a function was used. (As it happened, calling the function twice
2476 did not affect the overall behaviour.) The macro has been replaced by a
2477 function that can join an arbitrary number of extra strings onto a growing
2478 string.
2479
2480 (c) The code for expansion conditions now uses a table and a binary chop
2481 instead of a serial search (which was left over from when there were very
2482 few conditions). Also, it now recognizes conditions like "pam" even when
2483 the relevant support is not compiled in: a suitably worded error message is
2484 given if an attempt is made to use such a condition.
2485
248611. Added ${time_interval:xxxxx}.
2487
248812. A bug was causing one of the ddress fields not to be passed back correctly
2489 from remote delivery subprocesses. The field in question was not being
2490 subsequently used, so this caused to problems in practice.
2491
249213. Added new log selectors queue_time and deliver_time.
2493
249414. Might have fixed a bug in maildirsizefile handling that threw up
2495 "unexpected character" debug warnings, and recalculated the data
2496 unnecessarily. In any case, I expanded the warning message to give more
2497 information.
2498
249915. Added the message "Restricted characters in address" to the statements in
2500 the default ACL that block characters like @ and % in local parts.
2501
250216. Change 71 for release 4.31 proved to be much less benign that I imagined.
2503 Three changes have been made:
2504
2505 (a) There was a serious bug; a negative response to MAIL caused the whole
2506 recipient domain to be cached as invalid, thereby blocking all messages
2507 to all local parts at the same domain, from all senders. This bug has
2508 been fixed. The domain is no longer cached after a negative response to
2509 MAIL if the sender used is not empty.
2510
2511 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2512 been restored.
2513
2514 (c) A new callout option, "use_sender" has been added for people who want
2515 the modified behaviour.
2516
2517
2518Exim version 4.31
2519-----------------
2520
2521 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2522 Larry Rosenman.
2523
2524 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2525 indeed breaks things for older releases.
2526
2527 3. Added additional logging to the case where there is a problem reading data
2528 from a filter that is running in a subprocess using a pipe, in order to
2529 try to track down a specific problem.
2530
2531 4. Testing facility fudge: when running in the test harness and attempting
2532 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2533 getting "No route to host". Convert this to a timeout.
2534
2535 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2536 warning.
2537
2538 6. Some OS don't have socklen_t but use size_t instead. This affects the
2539 fifth argument of getsockopt() amongst other things. This is now
2540 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2541 can be set for individual OS. I have set it for SunOS5, OSF1, and
2542 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2543 some earlier ones do not.
2544
2545 7. Change 4.30/15 was not doing the test caselessly.
2546
2547 8. The standard form for an IPv6 address literal was being rejected by address
2548 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2549 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2550 this, as well as the form without the "IPv6" on the front (but only when
2551 address literals are enabled, of course).
2552
2553 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2554
255510. Exim crashed if a message with an empty sender address specified by -f
2556 encountered a router with an errors_to setting. This could be provoked only
2557 by a command such as
2558
2559 exim -f "" ...
2560
2561 where an empty string was supplied; "<>" did not hit this bug.
2562
256311. Installed PCRE release 4.5.
2564
256512. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2566 remained set. It is now erased.
2567
256813. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2569 times from message ids (which are base 36 rather than the normal 62).
2570
257114. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2572 were being counted as actual protocol errors, and logged if the log
2573 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2574 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2575 and DATA following a set of rejected RCPTs do not count as protocol errors.
2576 In other words, Exim assumes they were pipelined, though this may not
2577 actually be the case. Of course, in all cases the client gets an
2578 appropriate error code.
2579
258015. If a lookup fails in an ACL condition, a message about the failure may
2581 be available; it is used if testing the ACL cannot continue, because most
2582 such messages specify what the cause of the deferral is. However, some
2583 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2584 that caused an old message to be retained and used if a later statement
2585 caused a defer, replacing the real cause of the deferral.
2586
258716. If an IP address had so many PTR records that the DNS lookup buffer
2588 was not large enough to hold them, Exim could crash while trying to process
2589 the truncated data. It now detects and logs this case.
2590
259117. Further to 4.21/58, another change has been made: if (and only if) the
2592 first line of a message (the first header line) ends with CRLF, a bare LF
2593 in a subsequent header line has a space inserted after it, so as not to
2594 terminate the header.
2595
259618. Refactoring: tidied an ugly bit of code in appendfile that copied data
2597 unnecessarily, used atoi() instead of strtol(), and didn't check the
2598 termination when getting file sizes from file names by regex.
2599
260019. Completely re-implemented the support for maildirsize files, in the light
2601 of a number of problems with the previous contributed implementation
2602 (4.30/29). In particular:
2603
2604 . If the quota is zero, the maildirsize file is maintained, but no quota is
2605 imposed.
2606
2607 . If the maildir directory does not exist, it is created before any attempt
2608 to write a maildirsize file.
2609
2610 . The quota value in the file is just a cache; if the quota is changed in
2611 the transport, the new value overrides.
2612
2613 . A regular expression is available for excluding directories from the
2614 count.
2615
261620. The autoreply transport checks the characters in options that define the
2617 message's headers; it allows continued headers, but it was checking with
2618 isspace() after an embedded newline instead of explicitly looking for a
2619 space or a tab.
2620
262121. If all the "regular" hosts to which an address was routed had passed their
2622 expiry times, and had not reached their retry times, the address was
2623 bounced, even if fallback hosts were defined. Now Exim should go on to try
2624 the fallback hosts.
2625
262622. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2627 equivalent code in the SMTP transport. Some hosts send humungous responses
2628 to HELO/EHLO, more than 1024 it seems.
2629
263023. Refactoring: code in filter.c used (void *) for "any old type" but this
2631 gives compiler warnings in some environments. I've now done it "properly",
2632 using a union.
2633
263424. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2635 (because of problems with the built-in one) was declared to return uschar *
2636 instead of char *, causing compiler failure.
2637
263825. Fixed a file descriptor leak when processing alias/forward files.
2639
264026. Fixed a minor format string issue in dbfn.c.
2641
264227. Typo in exim.c: ("dmbnz" for "dbmnz").
2643
264428. If a filter file refered to $h_xxx or $message_headers, and the headers
2645 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2646 become corrupted.
2647
264829. When a sender address is verified, it is cached, to save repeating the test
2649 when there is more than one recipient in a message. However, when the
2650 verification involves a callout, it is possible for different callout
2651 options to be set for different recipients. It is too complicated to keep
2652 track of this in the cache, so now Exim always runs a verification when a
2653 callout is required, relying on the callout cache for the optimization.
2654 The overhead is duplication of the address routing, but this should not be
2655 too great.
2656
265730. Fixed a bug in callout caching. If a RCPT command caused the sender address
2658 to be verified with callout=postmaster, and the main callout worked but the
2659 postmaster check failed, the verification correctly failed. However, if a
2660 subsequent RCPT command asked for sender verification *without* the
2661 postmaster check, incorrect caching caused this verification also to fail,
2662 incorrectly.
2663
266431. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2665 it was not caching the DNS options (qualify_single, search_parents) that
2666 were used when the lookup failed. A subsequent lookup with different
2667 options therefore always gave the same answer, though there were cases
2668 where it should not have. (Example: a "domains = !$mx_any" option on a
2669 dnslookup router: the "domains" option is always processed without any
2670 widening, but the router might have qualify_single set.) Now Exim uses the
2671 cached value only when the same options are set.
2672
267332. Added John Jetmore's "exipick" utility to the distribution.
2674
267533. GnuTLS: When an attempt to start a TLS session fails for any reason other
2676 than a timeout (e.g. a certificate is required, and is not provided), an
2677 Exim server now closes the connection immediately. Previously it waited for
2678 the client to close - but if the client is SSL, it seems that they each
2679 wait for each other, leading to a delay before one of them times out.
2680
268134: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2682 maintained 0.8.x compatibility because I don't think many are using it, and
2683 it is clearly obsolete.
2684
268535. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2686 transport.
2687
268836. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2689 client certificate was expired. A simple patch fixes this, though I don't
2690 understand the full logic of why the verify callback is called multiple
2691 times.
2692
269337. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2694 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2695 which causes problems with some clients (such as the Certicom SSL Plus
2696 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2697 disables the coutermeasure allowing Eudora to connect."
2698
269938. Exim was not checking that a write() to a log file succeeded. This could
2700 lead to Bad Things if a log got too big, in particular if it hit a file
2701 size limit. Exim now panics and dies if it cannot write to a log file, just
2702 as it does if it cannot open a log file.
2703
270439. Modified OS/Makefile-Linux so that it now contains
2705
2706 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2707
2708 The two -D definitions ensure that Exim is compiled with large file
2709 support, which makes it possible to handle log files that are bigger than
2710 2^31.
2711
271240. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2713 instance) a domain was checked against a named list that involved a lookup,
2714 causing $domain_data to be set, then another domain was checked against the
2715 same list, then the first domain was re-checked, the value of $domain_data
2716 after the final check could be wrong. In particular, if the second check
2717 failed, it could be set empty. This bug probably also applied to
2718 $localpart_data.
2719
272041. The strip_trailing_dot option was not being applied to the address given
2721 with the -f command-line option.
2722
272342. The code for reading a message's header from the spool was incrementing
2724 $received_count, but never initializing it. This meant that the value was
2725 incorrect (doubled) while delivering a message in the same process in which
2726 it was received. In the most common configuration of Exim, this never
2727 happens - a fresh exec is done - but it can happen when
2728 deliver_drop_privilege is set.
2729
273043. When Exim logs an SMTP synchronization error - client data sent too soon -
2731 it now includes up to 150 characters of the unexpected data in the log
2732 line.
2733
273444. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2735 and building data strings. The size of both of these buffers was 10 000
2736 bytes - far larger than anybody would *ever* want, thought I. Needless to
2737 say, somebody hit the limit. I have increased the maximum line length to
2738 20 000 and the maximum data length of concatenated lines to 100 000. I have
2739 also fixed two bugs, because there was no checking on these buffers. Tsk,
2740 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2741 buffer is too small.
2742
274345. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2744 lsearch lookups. Now it does.
2745
274646. When parsing a route_list item in a manualroute router, a fixed-length
2747 buffer was used for the list of hosts. I made this 1024 bytes long,
2748 thinking that nobody would ever have a list of hosts that long. Wrong.
2749 Somebody had a whole pile of complicated expansion conditions, and the
2750 string was silently truncated, leading to an expansion error. It turns out
2751 that it is easier to change to an unlimited length (owing to other changes
2752 that have happened since this code was originally written) than to build
2753 structure for giving a limitation error. The length of the item that
2754 expands into the list of hosts is now unlimited.
2755
275647. The lsearch lookup could not handle data where the length of text line was
2757 more than 4095 characters. Such lines were truncated, leading to shortened
2758 data being returned. It should now handle lines of any length.
2759
276048. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2761 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2762 ACL").
2763
276449. Cosmetic tidy to scripts like exicyclog that are generated by globally
2765 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2766 no longer happens in comment lines. A list of replacements is now placed
2767 at the head of all of the source files, except those whose only change is
2768 to replace PERL_COMMAND in the very first #! line.
2769
277050. Replaced the slow insertion sort in queue.c, for sorting the list of
2771 messages on the queue, with a bottom-up merge sort, using code contributed
2772 by Michael Haardt. This should make operations like -bp somewhat faster on
2773 large queues. It won't affect queue runners, except when queue_run_in_order
2774 is set.
2775
277651. Installed eximstats 1.31 in the distribution.
2777
277852. Added support for SRV lookups to the dnslookup router.
2779
278053. If an ACL referred to $message_body or $message_body_end, the value was not
2781 reset for any messages that followed in the same SMTP session.
2782
278354. The store-handling optimization for building very long strings was not
2784 differentiating between the different store pools. I don't think this
2785 actually made any difference in practice, but I've tidied it.
2786
278755. While running the routers to verify a sender address, $sender_address
2788 was still set to the sender address. This is wrong, because when routing to
2789 send a bounce to the sender, it would be empty. Therefore, I have changed
2790 it so that, while verifying a sender address, $sender_address is set to <>.
2791 (There is no change to what happens when verifying a recipient address.)
2792
279356. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2794 target A or AAAA records (if not already returned) without resetting the
2795 qualify_single or search_parents options of the DNS resolver. These are
2796 inappropriate in this case because the targets of MX and SRV records must
2797 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2798 target that, when qualified, matched something in the local domain. These
2799 two options are now turned off when doing these lookups.
2800
280157. It seems that at least some releases of Reiserfs (which does not have the
2802 concept of a fixed number of inodes) returns zero and not -1 for the
2803 number of available inodes. This interacted badly with check_spool_inodes,
2804 which assumed that -1 was the "no such thing" setting. What I have done is
2805 to check that the total number of inodes is greater than zero before doing
2806 the test of how many are available.
2807
280858. When a "warn" ACL statement has a log_message modifier, the message is
2809 remembered, and not repeated. This is to avoid a lot of repetition when a
2810 message has many recipients that cause the same warning to be written.
2811 Howewer, Exim was preserving the list of already written lines for an
2812 entire SMTP session, which doesn't seem right. The memory is now reset if a
2813 new message is started.
2814
281559. The "rewrite" debugging flag was not showing the result of rewriting in the
2816 debugging output unless log_rewrite was also set.
2817
281860. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2819 of (int)(handle) when we know that handle contains (void *)(-1).
2820
282161. The Exim daemon panic-logs an error return when it closes the incoming
2822 connection. However "connection reset by peer" seems to be common, and
2823 isn't really an error worthy of noting specially, so that particular error
2824 is no long logged.
2825
282662. When Exim is trying to find all the local interfaces, it used to panic and
2827 die if the ioctl to get the interface flags failed. However, it seems that
2828 on at least one OS (Solaris 9) it is possible to have an interface that is
2829 included in the list of interfaces, but for which you get a failure error
2830 for this call. This happens when the interface is not "plumbed" into a
2831 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2832 failure of the "get flags" call assumes that the interface is down.
2833
283463. Added a ${eval10: operator, which assumes all numbers are decimal. This
2835 makes life easier for people who are doing arithmetic on fields extracted
2836 from dates, where you often get leading zeros that should not be
2837 interpreted as octal.
2838
283964. Added qualify_domain to the redirect router, to override the global
2840 setting.
2841
284265. If a pathologically long header line contained very many addresses (the
2843 report of this problem mentioned 10 000) and each of them was rewritten,
2844 Exim could use up a very large amount of memory. (It kept on making new
2845 copies of the header line as it rewrote, and never released the old ones.)
2846 At the expense of a bit more processing, the header rewriting function has
2847 been changed so that it no longer eats memory in this way.
2848
284966. The generation of the Received: header has been moved from the time that a
2850 message starts to be received, to the time that it finishes. The timestamp
2851 in the Received: header should now be very close to that of the <= log
2852 line. There are two side-effects of this change:
2853
2854 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2855 logged header lines no longer include the local Received: line, because
2856 it has not yet been created. The same applies to a copy of the message
2857 that is returned to a non-SMTP sender when a message is rejected.
2858
2859 (b) When a filter file is tested using -bf, no additional Received: header
2860 is added to the test message. After some thought, I decided that this
2861 is a bug fix.
2862
2863 This change does not affect the value of $received_for. It is still set
2864 after address rewriting, but before local_scan() is called.
2865
286667. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2867
286868. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2869 gave an unhelpful panic error message, and a defer error. I have managed to
2870 change this behaviour so that it now rejects any supplied certificate,
2871 which seems right, as the list of acceptable certificates is empty.
2872
287369. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2874 gave an unhelpful defer error. I have not managed to make this reject any
2875 supplied certificates, but the error message it gives is "no certificate
2876 supplied", which is not helpful.
2877
287870. exigrep's output now also includes lines that are not associated with any
2879 message, but which match the given pattern. Implemented by a patch from
2880 Martin Sluka, which also tidied up the Perl a bit.
2881
288271. Recipient callout verification, like sender verification, was using <> in
2883 the MAIL FROM command. This isn't really the right thing, since the actual
2884 sender may affect whether the remote host accepts the recipient or not. I
2885 have changed it to use the actual sender in the callout; this means that
2886 the cache record is now keyed on a recipient/sender pair, not just the
2887 recipient address. There doesn't seem to be a real danger of callout loops,
2888 since a callout by the remote host to check the sender would use <>.
2889 [SEE ABOVE: changed after hitting problems.]
2890
289172. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2892 temporary errors. However, in the case of such a code being given after
2893 the end of a data transmission (i.e. after ".") Exim was failing to write
2894 a retry record for the message. (Yes, there was some broken host that was
2895 actually sending 8xx at this point.)
2896
289773. An unknown lookup type in a host list could cause Exim to panic-die when
2898 the list was checked. (An example that provoked this was putting <; in the
2899 middle of a list instead of at the start.) If this happened during a DATA
2900 ACL check, a -D file could be left lying around. This kind of configuration
2901 error no longer causes Exim to die; instead it causes a defer errror. The
2902 incident is still logged to the main and panic logs.
2903
290474. Buglet left over from Exim 3 conversion. The message "too many messages
2905 in one connection" was written to the rejectlog but not the mainlog, except
2906 when address rewriting (yes!) was being logged.
2907
290875. Added write_rejectlog option.
2909
291076. When a system filter was run not as root (that is, when system_filter_user
2911 was set), the values of the $n variables were not being returned to the
2912 main process; thus, they were not subsequently available in the $sn
2913 variables.
2914
291577. Added +return_path_on_delivery log selector.
2916
291778. A connection timeout was being treated differently from recipients deferred
2918 when testing hosts_max_try with a message that was older than the host's
2919 retry timeout. (The host should not be counted, thus allowing all hosts to
2920 be tried at least once before bouncing.) This may have been the cause of an
2921 occasionally reported bug whereby a message would remain on the queue
2922 longer than the retry timeout, but would be bounced if a delivery was
2923 forced. I say "may" because I never totally pinned down the problem;
2924 setting up timeout/retry tests is difficult. See also the next item.
2925
292679. The ultimate address timeout was not being applied to errors that involved
2927 a combination of host plus message (for example, a timeout on a MAIL
2928 command). When an address resolved to a number of possible hosts, and they
2929 were not all tried for each delivery (e.g. because of hosts_max_try), a
2930 message could remain on the queue longer than the retry timeout.
2931
293280. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2933 Haardt.
2934
293581. Fixed an obscure SMTP outgoing bug which required at least the following
2936 conditions: (a) there was another message waiting for the same server;
2937 (b) the server returned 5xx to all RCPT commands in the first message so
2938 that the message was not completed; (c) the server dropped the connection
2939 or gave a negative response to the RSET that Exim sends to abort the
2940 transaction. The observed case was a dropped connection after DATA that had
2941 been sent in pipelining mode. That is, the server had advertised PIPELINING
2942 but was not implementing it correctly. The effect of the bug was incorrect
2943 behaviour, such as trying another host, and this could lead to a crash.
2944
2945
2946Exim version 4.30
2947-----------------
2948
2949 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2950 and daemon.c were passed as pointers to ints; they should have been
2951 pointers to socklen_t variables (which are typically unsigned ints).
2952
2953 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2954 fixed.
2955
2956 3. Fixed a really odd bug that affected only the testing scheme; patching a
2957 certain fixed string in the binary changed the value of another string that
2958 happened to be identical to the end of the original first string.
2959
2960 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2961 name", it returns that address as the IP address. On some operating
2962 systems (e.g. Solaris), it also passes back the IP address string as the
2963 "host name". However, on others (e.g. Linux), it passes back an empty
2964 string. Exim wasn't checking for this, and was changing the host name to an
2965 empty string, assuming it had been canonicized.
2966
2967 5. Although rare, it is permitted to have more than one PTR record for a given
2968 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2969 all the names associated with an address, because they do in Solaris.
2970 However, it seems that they do not in Linux for data that comes from the
2971 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2972 I found this out when I moved to a new Linux workstation and tried to run
2973 the Exim test suite.
2974
2975 To get round this problem I have changed the code so that it now does its
2976 own call to the DNS to look up PTR records when searching for a host name.
2977 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2978 addresses that are only in /etc/hosts are still found.
2979
2980 This behaviour is, however, controlled by an option called host_lookup_
2981 order, which defaults to "bydns:byaddr". If people want to use the other
2982 order, or indeed, just use one or the other means of lookup, they can
2983 specify it in this variable.
2984
2985 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2986 some operating systems, this comes back from gethostbyaddr() as an empty
2987 string, and this is what Exim used to test for. However, it seems that in
2988 other systems, "." is yielded. Exim now tests for this case too.
2989
2990 7. The values of check_spool_space and check_log_space are now held internally
2991 as a number of kilobytes instead of an absolute number of bytes. If a
2992 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2993 kilobyte. This means that much larger values can be stored.
2994
2995 8. Exim monitor: an attempt to get the action menu when not actually pointing
2996 at a message produces an empty menu entitled "No message selected". This
2997 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2998 no entries in it ("Shell widget menu has zero width and/or height"). So I
2999 have added a single, blank menu entry in this case.
3000
3001 9. Added ${quote_local_part.
3002
300310. MIME decoding is now applied to the contents of Subject: header lines when
3004 they are logged.
3005
300611. Now that a reference to $sender_host_address automatically causes a reverse
3007 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3008 host lookup before query-style lookups in lists that might use this
3009 variable. This has therefore been abolished, and the "net-" prefix is no
3010 longer necessary for query-style lookups.
3011
301212. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3013 have been a typo for LFLAGS, so it has been changed.
3014
301513. The install script calls Exim with "-C /dev/null" in order to find the
3016 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3017 to be output. Howeve, since Exim outputs its version number before the
3018 error, it didn't break the script. It just looked ugly. I fixed this by
3019 always allowing "-C /dev/null" if the caller is root.
3020
302114. Ignore overlarge ACL variable number when reading spool file - insurance
3022 against a later release with more variables having written the file.
3023
302415. The standard form for an IPv6 address literal was being rejected by EHLO.
3025 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3026 this, as well as the form without the "IPv6" on the front.
3027
302816. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3029 OS/Makefile-Darwin file.
3030
303117. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3032 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3033
303418. After change 4.21/52, "%ld" was used to format the contents of the $inode
3035 variable. However, some OS use ints for inodes. I've added cast to long int
3036 to get rid of the compiler warning.
3037
303819. I had forgotten to lock out "/../" in configuration file names when
3039 ALT_CONFIG_PREFIX was set.
3040
304120. Routers used for verification do not need to specify transports. However,
3042 if such a router generated a host list, and callout was configured, Exim
3043 crashed, because it could not find a port number from the (non-existent)
3044 transport. It now assumes port 25 in this circumstance.
3045
304621. Added the -t option to exigrep.
3047
304822. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3049 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3050 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3051 them is set, LOOKUP_LSEARCH is forced.
3052
305323. "exim -bV" now outputs a list of lookups that are included in the binary.
3054
305524. Added sender and host information to the "rejected by local_scan()" log
3056 line; previously there was no indication of these.
3057
305825. Added .include_if_exists.
3059
306026. Change 3.952/11 added an explicit directory sync on top of a file sync for
3061 Linux. It turns out that not all file systems support this. Apparently some
3062 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3063 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3064 not supported on the file descriptor, is now ignored when Exim is trying to
3065 sync a directory. This applies only to Linux.
3066
306727. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3068
306928. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3070 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3071 this.
3072
307329. Added support for maildirsize files from supplied patch (modified a bit).
3074
307530. The use of :fail: followed by an empty string could lead Exim to respond to
3076 sender verification failures with (e.g.):
3077
3078 550 Verification failed for <xxx>
3079 550 Sender verify failed
3080
3081 where the first response line was missing the '-' that indicates it is not
3082 the final line of the response.
3083
308431. The loop for finding the name of the user that called Exim had a hardwired
3085 limit of 10; it now uses the value of finduser_retries, which is used for
3086 all other user lookups.
3087
308832. Added $received_count variable, available in data and not_smtp ACLs, and at
3089 delivery time.
3090
309133. Exim was neglecting to zero errno before one call of strtol() when
3092 expanding a string and expecting an integer value. On some systems this
3093 resulted in spurious "integer overflow" errors. Also, it was casting the
3094 result into an int without checking.
3095
309634. Testing for a connection timeout using "timeout_connect" in the retry rules
3097 did not work. The code looks as if it has *never* worked, though it appears
3098 to have been documented since at least releast 1.62. I have made it work.
3099
310035. The "timeout_DNS" error in retry rules, also documented since at least
3101 1.62, also never worked. As it isn't clear exactly what this means, and
3102 clearly it isn't a major issue, I have abolished the feature by treating it
3103 as "timeout", and writing a warning to the main and panic logs.
3104
310536. The display of retry rules for -brt wasn't always showing the error code
3106 correctly.
3107
310837. Added new error conditions to retry rules: timeout_A, timeout_MX,
3109 timeout_connect_A, timeout_connect_MX.
3110
311138. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3112 to the empty sender.
3113
311439. The daemon was not analysing the content of -oX till after it had closed
3115 stderr and disconnected from the controlling terminal. This meant that any
3116 syntax errors were only noted on the panic log, and the return code from
3117 the command was 0. By re-arranging the code a little, I've made the
3118 decoding happen first, so such errors now appear on stderr, and the return
3119 code is 1. However, the actual setting up of the sockets still happens in
3120 the disconnected process, so errors there are still only recorded on the
3121 panic log.
3122
312340. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3124 connections (as happens on some IP stacks) was logged at start up time as
3125 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3126 it from "IPv6 and IPv4", which means that two separate sockets are being
3127 used.
3128
312941. The debug output for gethostbyname2() or getipnodebyname() failures now
3130 says whether AF_INET or AF_INET6 was passed as an argument.
3131
313242. Exiwhat output was messed up when time zones were included in log
3133 timestamps.
3134
313543. Exiwhat now gives more information about the daemon's listening ports,
3136 and whether -tls-on-connect was used.
3137
313844. The "port" option of the smtp transport is now expanded.
3139
314045. A "message" modifier in a "warn" statement in a non-message ACL was being
3141 silently ignored. Now an error message is written to the main and panic
3142 logs.
3143
314446. There's a new ACL modifier called "logwrite" which writes to a log file
3145 as soon as it is encountered.
3146
314747. Added $local_user_uid and $local_user_gid at routing time.
3148
314948. Exim crashed when trying to verify a sender address that was being
3150 rewritten to "<>".
3151
315249. Exim was recognizing only a space character after ".include". It now also
3153 recognizes a tab character.
3154
315550. Fixed several bugs in the Perl script that creates the exim.8 man page by
3156 extracting the relevant information from the specification. The man page no
3157 longer contains scrambled data for the -d option, and I've added a section
3158 at the front about calling Exim under different names.
3159
316051. Added "extra_headers" argument to the "mail" command in filter files.
3161
316252. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3163 crash.
3164
316553. Installed eximstats 1.29.
3166
316754. Added transport_filter_timeout as a generic transport option.
3168
316955. Exim no longer adds an empty Bcc: header to messages that have no To: or
3170 Cc: header lines. This was required by RFC 822, but it not required by RFC
3171 2822.
3172
317356. Exim used to add From:, Date:, and Message-Id: header lines to any
3174 incoming messages that did not have them. Now it does so only if the
3175 message originates locally, that is, if there is no associated remote host
3176 address. When Resent- header lines are present, this applies to the Resent-
3177 lines rather than the non-Resent- lines.
3178
317957. Drop incoming SMTP connection after too many syntax or protocol errors. The
3180 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3181
318258. Messages for configuration errors now include the name of the main
3183 configuration file - useful now that there may be more than one file in a
3184 list (.included file names were always shown).
3185
318659. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3187 for those rare installations that do not start the daemon as root or run it
3188 setuid root. I've cut out the call to initgroups() if the daemon is not
3189 root at that time.
3190
319160. The Exim user and group can now be bound into the binary as text strings
3192 that are looked up at the start of Exim's processing.
3193
319461. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3195
319662. Added $mailstore_basename variable.
3197
319863. Installed patch to sieve.c from Michael Haardt.
3199
320064. When Exim failed to open the panic log after failing to open the main log,
3201 the original message it was trying to log was written to stderr and debug
3202 output, but if they were not available (the usual case in production), it
3203 was lost. Now it is written to syslog before the two lines that record the
3204 failures to open the logs.
3205
320665. Users' Exim filters run in subprocesses under the user's uid. It is
3207 possible for a "deliver" command or an alias in a "personal" command to
3208 provoke an address rewrite. If logging of address rewriting is configured,
3209 this fails because the process is not running as root or exim. There may be
3210 a better way of dealing with this, but for the moment (because 4.30 needs
3211 to be released), I have disabled address rewrite logging when running a
3212 filter in a non-root, non-exim process.
3213
3214
3215Exim version 4.24
3216-----------------
3217
3218 1. The buildconfig auxiliary program wasn't quoting the value set for
3219 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3220 not defined. This bug was masked in 4.22 by the effect that was fixed in
3221 change 4.23/1.
3222
3223 2. Some messages that were rejected after a message id was allocated were
3224 shown as "incomplete" by exigrep. It no longer does this for messages that
3225 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3226
3227 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3228 have allow_domain_literals set, the ID did not get logged in the <= line.
3229 Domain literals are now always recognized in Message-ID: header lines.
3230
3231 4. The first argument for a ${extract expansion item is the key name or field
3232 number. Leading and trailing spaces in this item were not being ignored,
3233 causing some misleading effects.
3234
3235 5. When deliver_drop_privilege was set, single queue runner processes started
3236 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3237 same command in the process it spins off) were not dropping privilege.
3238
3239 6. When the daemon running as "exim" started a queue runner, it always
3240 re-executed Exim in the spun-off process. This is a waste of effort when
3241 deliver_drop_privilege is set. The new process now just calls the
3242 queue-runner function directly.
3243
3244
3245Exim version 4.23
3246-----------------
3247
3248 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3249 HEADERS_CHARSET.
3250
3251 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3252 ignored. Though the use of -oP was forcing the writing of a pid file, it
3253 was always written to the default place.
3254
3255 3. If the message "no IP address found for host xxxx" is generated during
3256 incoming verification, it is now followed by identification of the incoming
3257 connection (so you can more easily find what provoked it).
3258
3259 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3260
3261 5. Added some features to "harden" Exim a bit more against certain attacks:
3262
3263 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3264 be put in Local/Makefile. This is like the never_users runtime option,
3265 but it cannot be overridden. The default setting is "root".
3266
3267 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3268 prefix string with which any file named in a -C command line option
3269 must start.
3270
3271 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3272 is retained for -C and -D only if the caller of Exim is root. Without
3273 it, the exim user may also use -C and -D and retain privilege.
3274
3275 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3276 command line option is disabled.
3277
3278 6. Macro names set by the -D option must start with an upper case letter, just
3279 like macro names defined in the configuration file.
3280
3281 7. Added "dereference=" facility to LDAP.
3282
3283 8. Two instances of the typo "uknown" in the source files are fixed.
3284
3285 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3286 the Configure-Makefile script screwed up while processing it.
3287
328810. Incorporated PCRE 4.4.
3289
329011. The SMTP synchronization check was not operating right at the start of an
3291 SMTP session. For example, it could not catch a HELO sent before the client
3292 waited for the greeting. There is now a check for outstanding input at the
3293 point when the greeting is written. Because of the duplex, asynchronous
3294 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3295 way, but not yet received, when the check is performed.
3296
329712. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3298 on TCP/IP sockets, because this apparently causes some broken clients to
3299 timeout.
3300
330113. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3302 unchanged) from the Cygwin maintainer.
3303
330414. The code for -bV that shows what is in the binary showed "mbx" when maildir
3305 was supported instead of testing for mbx. Effectively a typo.
3306
330715. The spa authenticator server code was not checking that the input it
3308 received was valid base64.
3309
331016. The debug output line for the "set" modifier in ACLs was not showing the
3311 name of the variable that was being set.
3312
331317. Code tidy: the variable type "vtype_string" was never used. Removed it.
3314
331518. Previously, a reference to $sender_host_name did not cause a DNS reverse
3316 lookup on its own. Something else was needed to trigger the lookup. For
3317 example, a match in host_lookup or the need for a host name in a host list.
3318 Now, if $sender_host_name is referenced and the host name has not yet been
3319 looked up, a lookup is performed. If the lookup fails, the variable remains
3320 empty, and $host_lookup_failed is set to "1".
3321
332219. Added "eqi" as a case-independent comparison operator.
3323
332420. The saslauthd authentication condition could segfault if neither service
3325 nor realm was specified.
3326
332721. If an overflowing value such as "2048M" was set for message_size_limit, the
3328 error message that was logged was misleading, and incoming SMTP
3329 connections were dropped. The message is now more accurate, and temporary
3330 errors are given to SMTP connections.
3331
333222. In some error situations (such as 21 above) Exim rejects all SMTP commands
3333 (except RSET) with a 421 error, until QUIT is received. However, it was
3334 failing to send a response to QUIT.
3335
333623. The HELO ACL was being run before the code for helo_try_verify_hosts,
3337 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3338 ACL is now run after the helo_try_verify_hosts code.
3339
334024. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3341 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3342 case-independent, so other case variants are also recognized). Apparently
3343 some systems use these upper case variants.
3344
334525. If more than two messages were waiting for the same host, and a transport
3346 filter was specified for the transport, Exim sent two messages over the
3347 same TCP/IP connection, and then failed with "socket operation on non-
3348 socket" when it tried to send the third.
3349
335026. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3351
335227. The extern definition of crypt16() in expand.c was not being excluded when
3353 the OS had its own crypt16() function.
3354
335528. Added bounce_return_body as a new option, and bounce_return_size_limit
3356 as a preferred synonym for return_size_limit, both as an option and as an
3357 expansion variable.
3358
335929. Added LIBS=-liconv to OS/Makefile-OSF1.
3360
336130. Changed the default configuration ACL to relax the local part checking rule
3362 for addresses that are not in any local domains. For these addresses,
3363 slashes and pipe symbols are allowed within local parts, but the sequence
3364 /../ is explicitly forbidden.
3365
336631. SPA server authentication was not clearing the challenge buffer before
3367 using it.
3368
336932. log_message in a "warn" ACL statement was writing to the reject log as
3370 well as to the main log, which contradicts the documentation and doesn't
3371 seem right (because no rejection is happening). So I have stopped it.
3372
337333. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3374 However, I am unable to do any testing of this.
3375
337634. Fixed an infelicity in the appendfile transport. When checking directories
3377 for a mailbox, to see if any needed to be created, it was accidentally
3378 using path names with one or more superfluous leading slashes; tracing
3379 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3380
338135. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3382 contents are added to the log line that is written for every discarded
3383 recipient. (Previously a log_message setting was ignored.)
3384
338536. The ${quote: operator now quotes the string if it is empty.
3386
338737. The install script runs exim in order to find its version number. If for
3388 some reason other than non-existence or emptiness, which it checks, it
3389 could not run './exim', it was installing it with an empty version number,
3390 i.e. as "exim-". This error state is now caught, and the installation is
3391 aborted.
3392
339338. An argument was missing from the function that creates an error message
3394 when Exim fails to connect to the socket for saslauthd authentication.
3395 This could cause Exim to crash, or give a corrupted message.
3396
339739. Added isip, isip4, and isip6 to ${if conditions.
3398
339940. The ACL variables $acl_xx are now saved with the message, and can be
3400 accessed later in routers, transports, and filters.
3401
340241. The new lookup type nwildlsearch is like wildlsearch, except that the key
3403 strings in the file are not string-expanded.
3404
340542. If a MAIL command specified a SIZE value that was too large to fit into an
3406 int variable, the check against message_size_limit failed. Such values are
3407 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3408 day this will have to be increased, but I don't think I want to be around
3409 when emails are that large.
3410
3411
3412
3413Exim version 4.22
3414-----------------
3415
3416 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3417 iconv() is not standard in FreeBSD.
3418
3419 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3420 IPv6 enabled. The observed symptom was a segmentation fault on return from
3421 the function os_common_find_running_interfaces() in src/os.c.
3422
3423 3. In the check_special_case() function in daemon.c I had used "errno" as an
3424 argument name, which causes warnings on some systems. This was basically a
3425 typo, since it was named "eno" in the comments!
3426
3427 4. The code that waits for the clock to tick (at a resolution of some fraction
3428 of a second) so as to ensure message-id uniqueness was always waiting for
3429 at least one whole tick, when it could have waited for less. [This is
3430 almost certainly not relevant at current processor speeds, where it is
3431 unlikely to ever wait at all. But we try to future-proof.]
3432
3433 5. The function that sleeps for a time interval that includes fractions of a
3434 second contained a race. It did not block SIGALRM between setting the
3435 timer, and suspending (a couple of lines later). If the interval was short
3436 and the sigsuspend() was delayed until after it had expired, the suspension
3437 never ended. On busy systems this could lead to processes getting stuck for
3438 ever.
3439
3440 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3441 process, before it forks any delivery processes. The open lookup caching
3442 mechanism meant that the open file or database connection was passed into
3443 the delivery process. The problem was that delivery processes always tidy
3444 up cached lookup data. This could cause a problem for the next delivery
3445 process started by the queue runner, because the external queue runner
3446 process does not know about the closure. So the next delivery process
3447 still has data in the lookup cache. In the case of a file lookup, there was
3448 no problem because closing a file descriptor in a subprocess doesn't affect
3449 the parent. However, if the lookup was caching a connection to a database,
3450 the connection was closed, and the second delivery process was likely to
3451 see errors such as "PGSQL: query failed: server closed the connection
3452 unexpectedly". The problem has been fixed by closing all cached lookups
3453 in a queue runner before running a delivery process.
3454
3455 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3456 seem to have the "const" qualifier which it has on other OS. I've
3457 parameterised it.
3458
3459 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3460 *of the same type* (client or server) with the same public name that an
3461 error should be diagnosed.
3462
3463 9. When Exim looked up a host name for an IP address, but failed to find the
3464 original IP address when looking up the host name (a safety check), it
3465 output the message "<ip address> does not match any IP for NULL", which was
3466 confusing, to say the least. The bug was that the host name should have
3467 appeared instead of "NULL".
3468
346910. Since release 3.03, if Exim is called by a uid other than root or the Exim
3470 user that is built into the binary, and the -C or -D options is used, root
3471 privilege is dropped before the configuration file is read. In addition,
3472 logging is switched to stderr instead of the normal log files. If the
3473 configuration then re-defines the Exim user, the unprivileged environment
3474 is probably not what is expected, so Exim logs a panic warning message (but
3475 proceeds).
3476
3477 However, if deliver_drop_privilege is set, the unprivileged state may well
3478 be exactly what is intended, so the warning has been cut out in that case,
3479 and Exim is allowed to try to write to its normal log files.
3480
3481
3482Exim version 4.21
3483-----------------
3484
3485 1. smtp_return_error_details was not giving details for temporary sender
3486 or receiver verification errors.
3487
3488 2. Diagnose a configuration error if two authenticators have the same public
3489 name.
3490
3491 3. Exim used not to create the message log file for a message until the first
3492 delivery attempt. This could be confusing when incoming messages were held
3493 for policy or load reasons. The message log file is now created at the time
3494 the message is received, and an initial "Received" line is written to it.
3495
3496 4. The automatically generated man page for command line options had a minor
3497 bug that caused no ill effects; however, a more serious problem was that
3498 the procedure for building the man page automatically didn't always
3499 operate. Consequently, release 4.20 contains an out-of-date version. This
3500 shouldn't happen again.
3501
3502 5. When building Exim with embedded Perl support, the script that builds the
3503 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3504 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3505
3506 6. The freeze_tell option was not being used for messages that were frozen on
3507 arrival, either by an ACL or by local_scan().
3508
3509 7. Added the smtp_incomplete_transaction log selector.
3510
3511 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3512 was accepting AUTH without a new EHLO.
3513
3514 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3515 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3516 RFC.
3517
351810. Logging of TCP/IP connections (when configured) now happens in the main
3519 daemon process instead of the child process, so that the TCP/IP connection
3520 count is more accurate (but it can never be perfect).
3521
352211. The use of "drop" in a nested ACL was not being handled correctly in the
3523 outer ACL. Now, if condition failure induced by the nested "drop" causes
3524 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3525 or "require"), the connection is dropped.
3526
352712. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3528 that yield "discard" can now be used with an "accept" or a "discard" verb,
3529 but an error is generated for any others (because I can't see a useful way
3530 to define what should happen).
3531
353213. When an ACL is read dynamically from a file (or anywhere else), the lines
3533 are now processed in the same way as lines in the Exim configuration file.
3534 In particular, continuation lines are supported.
3535
353614. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3537
353815. Added -ti meaning -t -i.
3539
354016. Check for letters, digits, hyphens, and dots in the names of dnslist
3541 domains, and warn by logging if others are found.
3542
354317. At least on BSD, alignment is not guarenteed for the array of ifreq's
3544 returned from GIFCONF when Exim is trying to find the list of interfaces on
3545 a host. The code in os.c has been modified to copy each ifreq to an aligned
3546 structure in all cases.
3547
3548 Also, in some cases, the returned ifreq's were being copied to a 'struct
3549 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3550 means the last couple of bytes of an IPv6 address could be chopped if the
3551 ifreq contained only a normal sockaddr (14 bytes storage).
3552
355318. Named domain lists were not supported in the hosts_treat_as_local option.
3554 An entry such as +xxxx was not recognized, and was treated as a literal
3555 domain name.
3556
355719. Ensure that header lines added by a DATA ACL are included in the reject log
3558 if the ACL subsequently rejects the message.
3559
356020. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3561 MD5 (which is deprecated).
3562
356321. When testing a filter file using -bf, Exim was writing a message when it
3564 took the sender from a "From " line in the message, but it was not doing so
3565 when it took $return_path from a Return-Path: header line. It now does.
3566
356722. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3568 with a valid header line field name (a series of printing characters
3569 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3570
357123. Changed "disc" in the source to "disk" to conform to the documentation and
3572 the book and for uniformity.
3573
357424. Ignore Sendmail's -Ooption=value command line item.
3575
357625. When execve() failed while trying to run a command in a pipe transport,
3577 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3578 could be confused with a return value of 69 from the command itself. This
3579 has been changed to 127, the value the shell returns if it is asked to run
3580 a non-existent command. The wording for the related log line suggests a
3581 non-existent command as the problem.
3582
358326. If received_header_text expands to an empty string, do not add a Received:
3584 header line to the message. (Well, it adds a token one on the spool, but
3585 marks it "old" so that it doesn't get used or transmitted.)
3586
358727. Installed eximstats 1.28 (addition of -nt option).
3588
358928. There was no check for failure on the call to getsockname() in the daemon
3590 code. This can fail if there is a shortage of resources on the system, with
3591 ENOMEM, for example. A temporary error is now given on failure.
3592
359329. Contrary to the C standard, it seems that in some environments, the
3594 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3595 program. Exim now does this explicitly; it affects the formatting of
3596 timestamps using strftime().
3597
359830. If exiqsumm was given junk data, it threw up some uninitialized variable
3599 complaints. I've now initialized all the variables, to avoid this.
3600
360132. Header lines added by a system filter were not being "seen" during
3602 transport-time rewrites.
3603
360433. The info_callback() function passed to OpenSSL is set up with type void
3605 (*)(SSL *, int, int), as described somewhere. However, when calling the
3606 function (actually a macro) that sets it up, the type void(*)() is
3607 expected. I've put in a cast to prevent warnings from picky compilers.
3608
360934. If a DNS black list lookup found a CNAME record, but there were no A
3610 records associated with the domain it pointed at, Exim crashed.
3611
361235. If a DNS black list lookup returned more than one A record, Exim ignored
3613 all but the first. It now scans all returned addresses if a particular IP
3614 value is being sought. In this situation, the contents of the
3615 $dnslist_value variable are a list of all the addresses, separated by a
3616 comma and a space.
3617
361836. Tightened up the rules for host name lookups using reverse DNS. Exim used
3619 to accept a host name and all its aliases if the forward lookup for any of
3620 them yielded the IP address of the incoming connection. Now it accepts only
3621 those names whose forward lookup yields the correct IP address. Any other
3622 names are discarded. This closes a loophole whereby a rogue DNS
3623 administrator could create reverse DNS records to break through a
3624 wildcarded host restriction in an ACL.
3625
362637. If a user filter or a system filter that ran in a subprocess used any of
3627 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3628 the wrong values were passed to the pipe command ($thisaddress had the
3629 value of $0, $0 had the value of $1, etc). This bug was introduced by
3630 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3631
363238. Improved the line breaking for long SMTP error messages from ACLs.
3633 Previously, if there was no break point between 40 and 75 characters, Exim
3634 left the rest of the message alone. Two changes have been made: (a) I've
3635 reduced the minimum length to 35 characters; (b) if it can't find a break
3636 point between 35 and 75 characters, it looks ahead and uses the first one
3637 that it finds. This may give the occasional overlong line, but at least the
3638 remaining text gets split now.
3639
364039. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3641 file descriptors might be low, and that setting 1000 would always raise it.
3642 It turns out that in some environments, the limit is already over 1000 and
3643 that lowering it causes trouble. So now Exim takes care not to decrease it.
3644
364540. When delivering a message, the value of $return_path is set to $sender_
3646 address at the start of routing (routers may change the value). By an
3647 oversight, this default was not being set up when an address was tested by
3648 -bt or -bv, which affected the outcome if any router or filter referred to
3649 $return_path.
3650
365141. The idea of the "warn" ACL verb is that it adds a header or writes to the
3652 log only when "message" or "log_message" are set. However, if one of the
3653 conditions was an address verification, or a call to a nested ACL, the
3654 messages generated by the underlying test were being passed through. This
3655 no longer happens. The underlying message is available in $acl_verify_
3656 message for both "message" and "log_message" expansions, so it can be
3657 passed through if needed.
3658
365942. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3660 new expansion $bh_ to give the encoded byte string without charset
3661 translation. Translation happens only if iconv() is available; HAVE_ICONV
3662 indicates this at build time. HEADERS_CHARSET gives the charset to
3663 translate to; headers_charset can change it in the configuration, and
3664 "headers charset" can change it in an individual filter file.
3665
366643. Now that we have a default RFC 2047 charset (see above), the code in Exim
3667 that creates RFC 2047 encoded "words" labels them as that charset instead
3668 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3669 expansion operator; (ii) when Exim creates a From: line for a local
3670 message; (iii) when a header line is rewritten to include a "phrase" part.
3671
367244. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3673 buggy, causing it to skip the first lines of messages whose message ID
3674 ended in 'D'. This would not have bitten before Exim release 4.14, because
3675