Add -k and -l to exicyclog.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
3d240ff7 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.329 2006/03/16 11:51:09 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
3d240ff7
PH
309PH/61 Add -l and -k options to exicyclog.
310
214e2000 311
5de37277
PH
312Exim version 4.60
313-----------------
314
cc38ddbf
PH
315PH/01 Two changes to the default runtime configuration:
316
317 (1) Move the checks for relay_from_hosts and authenticated clients from
318 after to before the (commented out) DNS black list checks.
319
320 (2) Add control=submission to the relay_from_hosts and authenticated
321 clients checks, on the grounds that messages accepted by these
322 statements are most likely to be submissions.
5de37277 323
72fdd6ae
PH
324PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
325
326 (1) Generate an error if the third argument for the ${prvs expansion is
327 not a single digit.
328
329 (2) Treat a missing third argument of ${prvscheck as if it were an empty
330 string.
331
332 (3) Reset the variables that are obtained from the first argument of
333 ${prvscheck and used in the second argument before leaving the code,
334 because their memory is reclaimed, so using them afterwards may do
335 silly things.
336
337 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
338 one (it's much easier than Tom thought :-).
339
340 (5) Because of (4), we can now allow for the use of $prvscheck_result
341 inside the third argument.
cb9328de 342
cb741023
PH
343PH/03 For some reason, the default setting of PATH when running a command from
344 a pipe transport was just "/usr/bin". I have changed it to
345 "/bin:/usr/bin".
346
f174f16e
PH
347PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
348 anything to be listed in the output from -bV.
b2f5a032 349
c25242d7
PH
350PH/05 When a filter generated an autoreply, the entire To: header line was
351 quoted in the delivery log line, like this:
352
353 => >A.N.Other <ano@some.domain> <original@ddress> ...
354
355 This has been changed so that it extracts the operative address. There
356 may be more than one such address. If so, they are comma-separated, like
357 this:
358
359 => >ano@some.domain,ona@other.domain <original@ddress> ...
360
82c19f95
PH
361PH/06 When a client host used a correct literal IP address in a HELO or EHLO
362 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
363 not being looked up in the rDNS to get a host name, Exim was showing the
364 IP address twice in Received: lines, even though the IP addresses were
365 identical. For example:
366
367 Received: from [1.2.3.4] (helo=[1.2.3.4])
368
369 However, if the real host name was known, it was omitting the HELO data
370 if it matched the actual IP address. This has been tidied up so that it
371 doesn't show the same IP address twice.
372
d7ffbc12
PH
373PH/07 When both +timestamp and +memory debugging was on, the value given by
374 $tod_xxx expansions could be wrong, because the tod_stamp() function was
375 called by the debug printing, thereby overwriting the timestamp buffer.
376 Debugging no longer uses the tod_stamp() function when +timestamp is set.
377
9f526266
PH
378PH/08 When the original message was included in an autoreply transport, it
379 always said "this is a copy of the message, including all the headers",
380 even if body_only or headers_only was set. It now gives an appropriate
381 message.
382
87fcc8b9
PH
383PH/09 Applied a patch from the Sieve maintainer which:
384
385 o fixes some comments
386 o adds the (disabled) notify extension core
387 o adds some debug output for the result of if/elsif tests
388 o points to the current vacation draft in the documentation
389 and documents the missing references header update
390
391 and most important:
392
393 o fixes a bug in processing the envelope test (when testing
394 multiple envelope elements, the last element determinted the
395 result)
396
456682f5
PH
397PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
398 Electronic Mail") by including:
399
400 Auto-submitted: auto-generated
401
402 in the messages that it generates (bounce messages and others, such as
403 warnings). In the case of bounce messages for non-SMTP mesages, there was
404 also a typo: it was using "Auto_submitted" (underscore instead of
405 hyphen). Since every message generated by Exim is necessarily in response
406 to another message, thes have all been changed to:
407
408 Auto-Submitted: auto-replied
409
410 in accordance with these statements in the RFC:
411
412 The auto-replied keyword:
413
414 - SHOULD be used on messages sent in direct response to another
415 message by an automatic process,
416
417 - MUST NOT be used on manually-generated messages,
418
419 - MAY be used on Delivery Status Notifications (DSNs) and Message
420 Disposition Notifications (MDNs),
421
422 - MUST NOT be used on messages generated by automatic or periodic
423 processes, except for messages which are automatic responses to
424 other messages.
425
3e46c1aa
PH
426PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
427 to the default Received: header definition.
456682f5 428
49826d12
PH
429PH/12 Added log selector acl_warn_skipped (default on).
430
eba0c039
PH
431PH/13 After a successful wildlsearch lookup, discard the values of numeric
432 variables because (a) they are in the wrong storage pool and (b) even if
433 they were copied, it wouldn't work properly because of the caching.
434
a0d6ba8a
PH
435PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
436 checking when decoding. Apparently there are clients that generate
437 overlong encoded strings. Why am I not surprised?
438
f0917727
PH
439PH/15 If the first argument of "${if match_address" was not empty, but did not
440 contain an "@" character, Exim crashed. Now it writes a panic log message
441 and treats the condition as false.
442
096fee00
PH
443PH/16 In autoreply, treat an empty string for "once" the same as unset.
444
024bd3c2
PH
445PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
446 extension "envelope-auth". The code is finished and in agreement with
447 other implementations, but there is no documentation so far and in fact,
448 nobody wrote the draft yet. This extension is currently #undef'ed, thus
449 not changing the active code.
450
451 Print executed "if" and "elsif" statements when debugging is used. This
452 helps a great deal to understand what a filter does.
453
454 Document more things not specified clearly in RFC3028. I had all this
455 sorted out, when out of a sudden new issues came to my mind. Oops."
456
df199fec
PH
457PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
458 (Bugzilla #53).
459
d27f1df3
PH
460PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
461 canonical form (as documented). However, after a host name lookup from
462 the IP address, check_host() was doing a simple string comparison with
463 addresses acquired from the DNS when checking that the found name did
464 have the original IP as one of its addresses. Since any found IPv6
465 addresses are likely to be in abbreviated form, the comparison could
466 fail. Luckily, there already exists a function for doing the comparison
467 by converting both addresses to binary, so now that is used instead of
468 the text comparison.
469
96776534
PH
470PH/20 There was another similar case to PH/19, when a complete host name was
471 given in a host list; looking up its IP address could give an abbreviated
472 form, whereas the current host's name might or might not be abbreviated.
473 The same fix has been applied.
474
5de37277 475
9a799bc0
PH
476Exim version 4.54
477-----------------
478
479PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
480 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
481 It now does.
482
99a4b039
PH
483PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
484 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
485
486PH/03 Typo: missing ".o" in src/pcre/Makefile.
487
4b233853
PH
488PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
489 header line, restrict the check to what is listed in RFCs 2369 and 2929.
490 Also, for "Auto-Submitted", treat anything other than "no" as
491 non-personal, in accordance with RFC 3834. (Previously it treated
492 anything starting "auto-" as non-personal.)
493
8857ccfd
PH
494TF/01 The control=submission/name=... option had a problem with syntax
495 errors if the name included a slash character. The /name= option
496 now slurps the rest of the string, so it can include any characters
497 but it must come last in the list of options (after /sender_retain
498 or /domain=).
499
433a2980
PH
500PH/05 Some modifications to the interface to the fake nameserver for the new
501 testing suite.
502
3e46c1aa 503
9a799bc0 504
e3a311ba
TK
505Exim version 4.53
506-----------------
507
508TK/01 Added the "success_on_redirect" address verification option. See
509 NewStuff for rationale and an example.
510
13b685f9
PH
511PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
512
395ff96d
PH
513PH/02 Patch to exigrep to allow it to work on syslog lines.
514
5b68f6e4
PH
515PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
516 fread() to skip over the body file's header line, because in Cygwin the
517 header line is locked and is inaccessible.
518
1ab52c69
PH
519PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
520 co-exist for some time) to make it clear that it is the Exim ID that is
521 referenced, not the Message-ID: header line.
522
b07e6aa3
PH
523PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
524 string_format() function, because snprintf() does not exist on all
525 operating systems.
526
254e032f
PH
527PH/06 The use of forbid_filter_existstest now also locks out the use of the
528 ${stat: expansion item.
529
3af76a81
PH
530PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
531 protocol synchronization error", to keep the pedants happy.
532
2548ba04
PH
533PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
534 well as for IRIX systems, when gcc is being used. See the host.c source
535 file for comments.
536
b6c6011d
PH
537PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
538
cf39cf57
PH
539PH/10 Named domain lists were not working if used in a queue_smtp_domains
540 setting.
541
f1513293
PH
542PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
543 transport and to the smtp transport in LMTP mode.
544
727549a4
PH
545TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
546
af46795e
PH
547PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
548 run a filter in a subprocess. This could lead to confusion in subsequent
549 lookups in the parent process. There should also be a search_tidyup() at
550 the end of the subprocess.
551
d7b47fd0
PH
552PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
553 only if the host matched helo_try_verify_hosts, which caused the
554 verification to occur when the EHLO/HELO command was issued. The ACL just
555 tested the remembered result. Now, if a previous verification attempt has
556 not happened, "verify = helo" does it there and then.
557
ee744174
JJ
558JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
559
b582ab87
PH
560TK/03 Fix log output including CR from clamd.
561
41a13e0a
PH
562PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
563 exist provoked a memory error which could cause a segfault.
564
f625cc5a
PH
565PH/15 Installed PCRE 6.2
566
567PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
568
21f7af35
PH
569PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
570 of the problem. Specifically, suggested +O2 rather than +O1 for the
571 HP-UX compiler.
572
31480e42
PH
573PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
574
2d280592
PH
575PH/20 If a delivery was routed to a non-standard port by means of an SRV
576 record, the port was not correctly logged when the outgoing_port log
577 selector was set (it logged the transort's default port).
578
7cd1141b
PH
579PH/21 Added support for host-specific ports to manualroute, queryprogram,
580 fallback_hosts, and "hosts" in the smtp transport.
581
582PH/22 If the log selector "outgoing_port" is set, the port is now also given on
583 host errors such as "Connection refused".
584
750af86e
PH
585PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
586 authentication with radiusclient 0.4.9:
587
588 - Error returned from rc_read_config was caught wrongly
589 - Username/password not passed on to radius server due to wrong length.
590
591 The presumption is that some radiusclient API changes for 4.51/PH/17
592 were not taken care of correctly. The code is still untested by me (my
593 Linux distribution still has 0.3.2 of radiusclient), but it was
594 contributed by a Radius user.
595
596PH/24 When doing a callout, the value of $domain wasn't set correctly when
597 expanding the "port" option of the smtp transport.
598
4304270b
TK
599TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
600 while reading a MIME header. Thanks to Tom Hughes for a patch.
601
750af86e
PH
602PH/24 Include config.h inside local_scan.h so that configuration settings are
603 available.
604
64ffc24f
PH
605PH/25 Make $smtp_command_argument available after all SMTP commands. This means
606 that in an ACL for RCPT (for example), you can examine exactly what was
607 received.
608
5dd9625b
PH
609PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
610 commands, but it was not correctly comparing the address with the actual
611 client host address. Thus, it would show the EHLO address in Received:
612 header lines when this was not necessary.
613
5591031b
PH
614PH/27 Added the % operator to ${eval:}.
615
ba18e66a
PH
616PH/28 Exim tries to create and chdir to its spool directory when it starts;
617 it should be ignoring failures (because with -C, for example, it has lost
618 privilege). It wasn't ignoring creation failures other than "already
619 exists".
620
9cec981f
PH
621PH/29 Added "crypteq" to the list of supported features that Exim outputs when
622 -bV or -d is used.
623
aa2b5c79
PH
624PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
625 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
626 too many continuations, the temporary file was not being removed, and the
627 return code was incorrect.
aa2b5c79 628
48a53b7f
PH
629PH/31 Missing "BOOL" in function definition in filtertest.c.
630
1c59d63b
PH
631PH/32 Applied Sieve patches from the maintainer.
632
671012da
TK
633TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
634
1509d3a8
PH
635PH/33 Added "verify = not_blind".
636
637PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
638 Local/Makefile (with some defaults set). These are used in built scripts
639 such as exicyclog, but they have never been used in the exim_install
640 script (though there are many overriding facilities there). I have
641 arranged that the exim_install script now takes note of these two
642 settings.
643
644PH/35 Installed configuration files for Dragonfly.
645
2fe1a124
PH
646PH/36 When a locally submitted message by a trusted user did not contain a
647 From: header, and the sender address was obtained from -f or from an SMTP
648 MAIL command, and the trusted user did not use -F to supply a sender
649 name, $originator_name was incorrectly used when constructing a From:
650 header. Furthermore, $originator_name was used for submission mode
651 messages from external hosts without From: headers in a similar way,
652 which is clearly wrong.
653
8800895a
PH
654PH/37 Added control=suppress_local_fixups.
655
ccfdb010
PH
656PH/38 When log_selector = +received_sender was set, and the addition of the
657 sender made the log line's construction buffer exactly full, or one byte
658 less than full, an overflow happened when the terminating "\n" was
659 subsequently added.
660
1130bfb0
PH
661PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
662 when the result of a list match is failure because a DNS lookup failed.
663
ebcb507f
PH
664PH/40 RM_COMMAND is now used in the building process.
665
c35e155c
PH
666PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
667 the "build-* directories that it finds.
668
95d1f782
PH
669PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
670 address in a domain literal was a prefix of an interface address.
671
fd6de02e
PH
672PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
673 when verifying a sender address, unless rewrite_headers is false.
674
58de37c5
PH
675PH/44 Wrote a long comment about why errors_to addresses are verified as
676 recipients, not senders.
677
261cf466
TF
678TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
679 the ratelimit ACL was added.
680
3ee512ff
PH
681PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
682
e08c430f
PH
683PH/46 Added extra information about PostgreSQL errors to the error string.
684
bef5a11f
PH
685PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
686 avoiding the need to install special zones in a real server. This is
687 backwards compatible; if it can't find the fake resolver, it drops back.
688 Thus, both old and new test suites can be run.
689
7546de58
TF
690TF/02 Added util/ratelimit.pl
691
e5d5a95f
TF
692TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
693 clock is set back in time.
694
2e88a017
TF
695TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
696 Candler <B.Candler@pobox.com>.
697
a5f65aa4
TF
698TF/05 The fix for PH/43 was not completely correct; widen_domains is always
699 OK for addresses that are the result of redirections.
700
e7726cbf
PH
701PH/48 A number of further additions for the benefit of the new test suite,
702 including a fake gethostbyname() that interfaces to the fake DNS resolver
703 (see PH/47 above).
704
a7fdad5b
TF
705TF/06 The fix for widen_domains has also been applied to qualify_single and
706 search_parents which are the other dnslookup options that can cause
707 header rewrites.
708
6af56900
PH
709PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
710 type ("H").
711
0925ede6
PH
712PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
713
66afa403
TF
714TF/07 Exim produced the error message "an SRV record indicated no SMTP
715 service" if it encountered an MX record with an empty target hostname.
716 The message is now "an MX or SRV record indicated no SMTP service".
717
0154e85a
TF
718TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
719 if the DNS of the sending site is misconfigured. This is quite a
720 common situation. This change restores the behaviour of treating a
721 helo verification defer as a failure.
722
16f12c76
PH
723PH/51 If self=fail was set on a router, the bounce message did not include the
724 actual error message.
725
bbe902f0 726
e5a9dba6
PH
727Exim version 4.52
728-----------------
729
730TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
731
22c3b60b
PH
732PH/01 When a transport filter timed out in a pipe delivery, and the pipe
733 command itself ended in error, the underlying message about the transport
734 filter timeout was being overwritten with the pipe command error. Now the
735 underlying error message should be appended to the second error message.
736
06a9b4b5
PH
737TK/01 Fix poll() being unavailable on Mac OSX 10.2.
738
c1ac6996
PH
739PH/02 Reduce the amount of output that "make" produces by default. Full output
740 can still be requested.
741
9c7a242c
PH
742PH/03 The warning log line about a condition test deferring for a "warn" verb
743 was being output only once per connection, rather than after each
744 occurrence (because it was using the same function as for successful
745 "warn" verbs). This seems wrong, so I have changed it.
746
87ba3f5f
PH
747TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
748 it should not have, which might have caused a crash in the right
749 circumstances, but probably never did.
750
751PH/04 Installed a modified version of Tony Finch's patch to make submission
752 mode fix the return path as well as the Sender: header line, and to
753 add a /name= option so that you can make the user's friendly name appear
754 in the header line.
755
29aba418
TF
756TF/03 Added the control = fakedefer ACL modifier.
757
fe0dab11
TF
758TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
759 Mark Lowes for thorough testing.
870f6ba8 760
11d337a4
TK
761TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
762
763TK/03 Merged latest SRS patch from Miles Wilton.
764
415c8f3b
PH
765PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
766 with the definition in sysexits.h (which is #included earlier).
767 Fortunately, Exim does not actually use EX_OK. The code used to try to
768 preserve the sysexits.h value, by assumimg that macro definitions were
769 scanned for macro replacements. I have been disabused of this notion,
770 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 771
958541e9
PH
772PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
773 in the smtp transport. When a block could not be written in a single
774 write() function, the timeout was being re-applied to each part-write.
775 This seems wrong - if the receiver was accepting one byte at a time it
776 would take for ever. The timeout is now adjusted when this happens. It
777 doesn't have to be particularly precise.
778
c206415f
TK
779TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
780 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
781
2a4be8f9
PH
782PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
783 without a domain if the check to <postmaster@domain> fails.
784
1cba11c5
SC
785SC/01 Eximstats: added -xls and the ability to specify output files
786 (patch written by Frank Heydlauf).
787
788SC/02 Eximstats: use FileHandles for outputing results.
789
790SC/03 Eximstats: allow any combination of xls, txt, and html output.
791
792SC/04 Eximstats: fixed display of large numbers with -nvr option
793
794SC/05 Eximstats: fixed merging of reports with empty tables.
795
796SC/06 Eximstats: added the -include_original_destination flag
797
798SC/07 Eximstats: removed tabs and trailing whitespace.
799
1005d00e
TK
800TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
801
802TK/06 MBOX spool code: Add real "From " MBOX separator line
803 so the .eml file is really in mbox format (even though
804 most programs do not really care). Patch from Alex Miller.
805
806TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
807 The latter is generated from $received_to and is only set if the
808 message has one envelope recipient. SA can use these headers,
809 obviously out-of-the-box. Patch from Alex Miller.
810
9b4768fa
PH
811PH/08 The ${def test on a variable was returning false if the variable's
812 value was "0", contrary to what the specification has always said!
813 The result should be true unless the variable is empty.
814
815PH/09 The syntax error of a character other than { following "${if
816 def:variable_name" (after optional whitespace) was not being diagnosed.
817 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
818 accidental colon was present, for example, could give incorrect results.
819
0d7eb84a
PH
820PH/10 Tidied the code in a number of places where the st_size field of a stat()
821 result is used (not including appendfile, where other changes are about
822 to be made).
823
824PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
825 This involved changing a lot of size variables from int to off_t. It
826 should work with maildirs and everything.
827
40727bee
TK
828TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
829 spamd dying while we are connected to it.
830
554d2369
TF
831TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
832 <jgh@wizmail.org>
833
1f922db1
PH
834PH/12 Applied Alex Kiernan's patch for the API change for the error callback
835 function for BDB 4.3.
836
ef213c3b
PH
837PH/13 Changed auto_thaw such that it does not apply to bounce messages.
838
8ac170f3
PH
839PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
840 the sources for PCRE have been re-arranged and more files are now
841 involved.
842
b1c749bb
PH
843PH/15 The code I had for printing potentially long long variables in PH/11
844 above was not the best (it lost precision). The length of off_t variables
845 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
846 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
847 to be "long long int" or "long int". This is needed for the internal
848 formatting function string_vformat().
b1c749bb 849
4aac9b49
PH
850PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
851 the configuration file to be ":syslog", then the script "guesses" where
852 the logs files are, rather than using the compiled in default. In our
853 case the guess is not the same as the compiled default, so the script
854 suddenly stopped working when I started to use syslog. The patch checks
855 to see if log_file_path is "". If so, it attempts to read it from exim
856 with no configuration file to get the compiled in version, before it
857 falls back to the previous guessing code."
858
294520c8
TK
859TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
860 implementing BATV in an Exim configuration. See NewStuff for the gory
861 details.
862
5bd022fe
PH
863PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
864 Makefile that are specific to HP-UX.
865
90e9ce59
PH
866PH/18 If the "use_postmaster" option was set for a recipient callout together
867 with the "random" option, the postmaster address was used as the MAIL
868 FROM address for the random test, but not for the subsequent recipient
869 test. It is now used for both.
870
5ea81592
PH
871PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
872 patch removes a few documentation additions to RFC 3028, because the
873 latest draft now contains them. It adds the new en;ascii-case comparator
874 and a new error check for 8bit text in MIME parts. Comparator and
875 require names are now matched exactly. I enabled the subaddress
876 extension, but it is not well tested yet (read: it works for me)."
877
c6c2dc1d
PH
878PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
879 rework some of the code of TK/09 above to avoid the hardwired use of
880 "%lld" and "long long". Replaced the call to snprintf() with a call to
881 string_vformat().
882
fffffe4c
PH
883PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
884 records point to non-existent hosts", "retry timeout exceeded", and
885 "retry time not reached for any host after a long failure period".
ca02eafb 886
9a26b6b2
PH
887PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
888 experimental DomainKeys support:
889
890 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
891 (2) On an error such as an illegally used "control", the wrong name for
892 the control was given.
893
894 These problems did NOT occur unless DomainKeys support was compiled.
895
4aee0225
PH
896PH/23 Added daemon_startup_retries and daemon_startup_sleep.
897
32d668a5
PH
898PH/24 Added ${if match_ip condition.
899
8187c3f3
PH
900PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
901 databases so that it will be absolutely obvious if a crash occurs in the
902 DB library. This is a regular occurrence (often caused by mis-matched
903 db.h files).
904
ff790e47 905PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
906 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
907 picked up on a user's system that detects such things. There doesn't seem
908 to be a gcc warning option for this - only an attribute that has to be
909 put on the function's prototype. It seems that in Fedora Core 4 they have
910 set this on a number of new functions. No doubt there will be more in due
911 course.
ff790e47 912
5417f6d1
PH
913PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
914 specify a transport. However, if an address that was verified by such a
915 router was the subject of a callout, Exim crashed because it tried to
916 read the rcpt_include_affixes from the non-existent transport. Now it
917 just assumes that the setting of that option is false. This bug was
918 introduced by 4.51/PH/31.
919
59cf8544
PH
920PH/28 Changed -d+all to exclude +memory, because that information is very
921 rarely of interest, but it makes the output a lot bigger. People tend to
922 do -d+all out of habit.
923
e7ad8a65
PH
924PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
925 code in os-type was giving problems when libc.so lives in lib64, like on
926 x86_64 Fedora Core.
927
ade42478
PH
928PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
929 aren't the modern standard, and it seems that some systems' include files
930 don't always have them. Exim was already checking for some of the newer
931 ones like T_AAAA, and defining it itself. I've added checks for all the
932 record types that Exim uses.
933
182ad5cf
PH
934PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
935 not automatically generating a new one, as it is supposed to. This
936 prevented TLS from working. If the file did exist, but contained invalid
937 data, a new version was generated, as expected. It was only the case of a
938 non-existent file that was broken.
939
b0d9fc80
TK
940TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
941 with a change in libdomainkeys > 0.64.
942
943TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
944 from DNS. If the selector record carries the flag, it now has
945 precedence over the domain-wide flag.
946
947TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
948
47c7a64a
PH
949PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
950 the use of a port name that isn't defined in /etc/services) occurred, the
951 message was deferred as in a normal delivery, and thus remained on the
952 spool, instead of being failed because of the mua_wrapper setting. This
953 is now fixed, and I tidied up some of the mua_wrapper messages at the
954 same time.
955
a388bce4
SC
956SC/08 Eximstats: whilst parsing the mainlog(s), store information about
957 the messages in a hash of arrays rather than using individual hashes.
958 This is a bit cleaner and results in dramatic memory savings, albeit
959 at a slight CPU cost.
960
961SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
962 as requested by Marc Sherman.
963
964SC/10 Eximstats: added histograms for user specified patterns as requested
965 by Marc Sherman.
966
0793e4ed
SC
967SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
968
c58b88df
PH
969PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
970 fopen() in the content-scanning modules that did not already have it.
971
e7ad8a65 972
7982096b
PH
973Exim version 4.51
974-----------------
975
1a46a8c5
PH
976TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
977 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
978
2f079f46 979TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
980
981TK/03 Fix ACL "regex" condition not being available in MIME ACL.
982
983PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
984 to test Sieve filters that use "vacation".
985
986PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
987 that changes the way the GnuTLS parameters are stored in the cache file.
988 The new format can be generated externally. For backward compatibility,
989 if the data in the cache doesn't make sense, Exim assumes it has read an
990 old-format file, and it generates new data and writes a new file. This
991 means that you can't go back to an older release without removing the
992 file.
993
994PH/03 A redirect router that has both "unseen" and "one_time" set does not
995 work if there are any delivery delays because "one_time" forces the
996 parent to be marked "delivered", so its unseen clone is never tried
997 again. For this reason, Exim now forbids the simultaneous setting of
998 these two options.
999
1000PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1001 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1002 entry if you want to know the details. The fix, however, neglected to
1003 consider the case when local delivery batching is involved. The test for
1004 "previously delivered" was not happening when checking to see if an
1005 address could be batched with a previous (undelivered) one; under
1006 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1007 address.
1a46a8c5
PH
1008
1009PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1010 in its include files, and this causes problems building Exim.
1011
1012PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1013 header_syntax) but Exim was just ignoring anything given after a slash.
1014 In particular, this caused confusion with an attempt to use "verify =
1015 reverse_host_lookup/defer_ok". An error is now given when options are
1016 supplied for verify items that do not have them. (Maybe reverse_host_
1017 lookup should have a defer_ok option, but that's a different point.)
1018
1019PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1020 defined by RFC 821) to 2048, because there were problems with some AUTH
1021 commands, and RFC 1869 says the size should be increased for extended
1022 SMTP commands that take arguments.
1023
1024PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1025 Finch).
1026
1027PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1028 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1029
49c2d5ea
PH
1030PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1031 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1032 whatever). Otherwise the password may appear in the log. Following change
1033 PH/42 below, there is no longer a chance of it appearing in a bounce
1034 message.
49c2d5ea 1035
bf759a8b
PH
1036PH/11 Installed exipick version 20050225.0 from John Jetmore.
1037
83364d30
PH
1038PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1039 of its addresses was ever tried. (Bugzilla bug #2.)
1040
7999bbd7
PH
1041PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1042 the result incorrectly in the debug output. (It correctly added a newline
1043 to what was transported.)
1044
7dbf77c9
PH
1045TF/01 Added $received_time.
1046
74e0617f
PH
1047PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1048 commented out examples of how to interface to a virus scanner and to
1049 SpamAssassin. Also added commented examples of av_scanner and
1050 spamd_address settings.
1051
2f079f46
PH
1052PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1053 and controls are allowed in which ACLs. There were a couple of minor
1054 errors. Some of the entries in the conditions table (which is a table of
1055 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1056 negation of where the condition IS allowed.
1057
8c841523
PH
1058PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1059
7766a4f0
PH
1060PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1061 header file does not have a version number, so I've had to invent a new
1062 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1063 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1064 radiusclient), but it was contributed by a Radius user.
1065
8b417f2c
PH
1066PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1067 files or directories, for OpenSSL.
1068
901f42cb
PH
1069PH/19 When an Exim process that is running as root has to create an Exim log
1070 file, it does so in a subprocess that runs as exim:exim so as to get the
1071 ownership right at creation (otherwise, other Exim processes might see
1072 the file with the wrong ownership). There was no test for failure of this
1073 fork() call, which would lead to the process getting stuck as it waited
1074 for a non-existent subprocess. Forks do occasionally fail when resources
1075 run out. I reviewed all the other calls to fork(); they all seem to check
1076 for failure.
1077
f9b9210e
PH
1078PH/20 When checking for unexpected SMTP input at connect time (before writing
1079 the banner), Exim was not dealing correctly with a non-positive return
1080 from the read() function. If the client had disconnected by this time,
1081 the result was a log entry for a synchronization error with an empty
1082 string after "input=" when read() returned zero. If read() returned -1
1083 (an event I could not check), uninitialized data bytes were printed.
1084 There were reports of junk text (parts of files, etc) appearing after
1085 "input=".
1086
54cdb463
PH
1087PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1088
cf00dad6
PH
1089PH/22 Added support for macro redefinition, and (re)definition in between
1090 driver and ACL definitions.
1091
acb1b346
PH
1092PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1093 forgetting to use the resulting value; it was using the unexpanded value.
1094
c5ddb310
PH
1095PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1096 hadn't been configured. The fix is from Juergen Kreileder, who
1097 understands it better than I do:
1098
1099 "Here's what I see happening with three configured cyrus_sasl
1100 authenticators configured (plain, login, cram-md5):
1101
1102 On startup auth_cyrus_sasl_init() gets called for each of these.
1103 This means three calls to sasl_listmech() without a specified mech_list.
1104 => SASL tests which mechs of all available mechs actually work
1105 => three warnings about OTP not working
1106 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1107
1108 With the patch, sasl_listmech() also gets called three times. But now
1109 SASL's mech_list option is set to the server_mech specified in the the
1110 authenticator. Or in other words, the answer from sasl_listmech()
1111 gets limited to just the mech you're testing for (which is different
1112 for each call.)
1113 => the return list contains just 'plain' or 'login', 'cram-md5' or
1114 nothing depending on the value of ob->server_mech.
1115
1116 I've just tested the patch: Authentication still works fine,
1117 unavailable mechs specified in the exim configuration are still
1118 caught, and the auth.log warnings about OTP are gone."
1119
31619da6
PH
1120PH/25 When debugging is enabled, the contents of the command line are added
1121 to the debugging output, even when log_selector=+arguments is not
1122 specified.
1123
bebaf0fc
PH
1124PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1125 answer is "GNU", and only if the return is "GNU/something" is the answer
1126 "Linux".
1127
475fe28a
PH
1128PH/27 $acl_verify_message is now set immediately after the failure of a
1129 verification in an ACL, and so is available in subsequent modifiers. In
1130 particular, the message can be preserved by coding like this:
1131
1132 warn !verify = sender
1133 set acl_m0 = $acl_verify_message
1134
1135 Previously, $acl_verify_message was set only while expanding "message"
1136 and "log_message" when a very denied access.
1137
7e8bec7a
PH
1138PH/28 Modified OS/os.c-Linux with
1139
1140 -#ifndef OS_LOAD_AVERAGE
1141 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1142
1143 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1144 nomenclature these days.)
1145
e4a89c47
PH
1146PH/29 Installed patch from the Sieve maintainer that adds the options
1147 sieve_useraddress and sieve_subaddress to the redirect router.
1148
5ca2a9a1
PH
1149PH/30 In these circumstances:
1150 . Two addresses routed to the same list of hosts;
1151 . First host does not offer TLS;
1152 . First host accepts first address;
1153 . First host gives temporary error to second address;
1154 . Second host offers TLS and a TLS session is established;
1155 . Second host accepts second address.
1156 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1157 and peerdn, if requested) that were in fact used only for the second
1158 address.
7e8bec7a 1159
c688b954
PH
1160PH/31 When doing a callout as part of verifying an address, Exim was not paying
1161 attention to any local part prefix or suffix that was matched by the
1162 router that accepted the address. It now behaves in the same way as it
1163 does for delivery: the affixes are removed from the local part unless
1164 rcpt_include_affixes is set on the transport.
1165
fed77020
PH
1166PH/32 Add the sender address, as F=<...>, to the log line when logging a
1167 timeout during the DATA phase of an incoming message.
1168
7fe1560f
PH
1169PH/33 Sieve envelope tests were broken for match types other than :is. I have
1170 applied a patch sanctioned by the Sieve maintainer.
c688b954 1171
ebb6e6d5
PH
1172PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1173 the uid or gid is negative. A case of a negative gid caused this to be
1174 noticed. The fix allows for either to be negative.
1175
9c4e8f60
PH
1176PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1177 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1178 overlooked.
1179
1180PH/36 The change PH/12 above was broken. Fixed it.
1181
d7174846
PH
1182PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1183 the grounds that routing the same address twice would always produce the
1184 same answer. This might have been true once, but it is certainly no
1185 longer true now. Routing a child address may depend on the previous
1186 routing that produced that child. Some complicated redirection strategies
1187 went wrong when messages had multiple recipients, and made Exim's
1188 behaviour dependent on the order in which the addresses were given.
1189
1190 I have moved the duplicate checking until after the routing is complete.
1191 Exim scans the addresses that are assigned to local and remote
1192 transports, and removes any duplicates. This means that more work will be
1193 done, as duplicates will always all be routed, but duplicates are
1194 presumably rare, so I don't expect this is of any significance.
1195
1196 For deliveries to pipes, files, and autoreplies, the duplicate checking
1197 still happens during the routing process, since they are not going to be
1198 routed further.
1199
cfe75fc3
PH
1200PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1201 It corrects a timeout issue with spamd. This is Ian's comment: "The
1202 background is that sometimes spamd either never reads data from a
1203 connection it has accepted, or it never writes response data. The exiscan
1204 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1205 blindly assumes that writes won't block so it may never time out."
1206
be22d70e
PH
1207PH/39 Allow G after quota size as well as K and M.
1208
0612b098
PH
1209PH/40 The value set for $authenticated_id in an authenticator may not contain
1210 binary zeroes or newlines because the value is written to log lines and
1211 to spool files. There was no check on this. Now the value is run through
1212 the string_printing() function so that such characters are converted to
1213 printable escape sequences.
1214
2e0c1448
PH
1215PH/41 $message_linecount is a new variable that contains the total number of
1216 lines in the message. Compare $body_linecount, which is the count for the
1217 body only.
1218
447d236c
PH
1219PH/42 Exim no longer gives details of delivery errors for specific addresses in
1220 bounce and delay warning messages, except in certain special cases, which
1221 are as follows:
1222
1223 (a) An SMTP error message from a remote host;
1224 (b) A message specified in a :fail: redirection;
1225 (c) A message specified in a "fail" command in a system filter;
1226 (d) A message specified in a FAIL return from the queryprogram router;
1227 (e) A message specified by the cannot_route_message router option.
1228
1229 In these cases only, Exim does include the error details in bounce and
1230 warning messages. There are also a few cases where bland messages such
1231 as "unrouteable address" or "local delivery error" are given.
1232
d20976dc
PH
1233PH/43 $value is now also set for the "else" part of a ${run expansion.
1234
f656d135
PH
1235PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1236 being worked on, but at least Exim now implements the latest version to
1237 play with."
1238
2e2a30b4
PH
1239PH/45 In a pipe transport, although a timeout while waiting for the pipe
1240 process to complete was treated as a delivery failure, a timeout while
1241 writing the message to the pipe was logged, but erroneously treated as a
1242 successful delivery. Such timeouts include transport filter timeouts. For
1243 consistency with the overall process timeout, these timeouts are now
1244 treated as errors, giving rise to delivery failures by default. However,
1245 there is now a new Boolean option for the pipe transport called
1246 timeout_defer, which, if set TRUE, converts the failures into defers for
1247 both kinds of timeout. A transport filter timeout is now identified in
1248 the log output.
1249
9176e9f0
PH
1250PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1251 systems where "make" and "gmake" are different, calling "gmake" at top
1252 level broke things. I've arranged for the value of $(MAKE) to be passed
1253 from the Makefile to this script so that it can call the same version of
1254 "make".
1255
7982096b 1256
bbe902f0
PH
1257A note about Exim versions 4.44 and 4.50
1258----------------------------------------
1259
1260Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1261changes of various kinds. As a consequence, a big documentation update was
1262needed. This delayed the release for rather longer than seemed good, especially
1263in the light of a couple of (minor) security issues. Therefore, the changes
1264that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1265release. So 4.44 and 4.50 are in effect two different branches that both start
1266from 4.43.
1267
1268I have left the 4.50 change log unchanged; it contains all the changes since
12694.43. The change log for 4.44 is below; many of its items are identical to
1270those for 4.50. This seems to be the most sensible way to preserve the
1271historical information.
1272
1273
f7b63901 1274Exim version 4.50
495ae4b0
PH
1275-----------------
1276
5fe762f6
PH
1277 1. Minor wording change to the doc/README.SIEVE file.
1278
139059f6 1279 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1280 computation of the current number of files was incorrect.
495ae4b0 1281
7086e875
PH
1282 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1283 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1284 place.
1285
35af9f61
PH
1286 4. Give more explanation in the error message when the command for a transport
1287 filter fails to execute.
1288
b668c215
PH
1289 5. There are several places where Exim runs a non-Exim command in a
1290 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1291 was being done only for the command run by the queryprogram router. It is
1292 now done for all such subprocesses. The other cases are: ${run, transport
1293 filters, and the commands run by the lmtp and pipe transports.
1294
a494b1e1
PH
1295 6. Added CONFIGURE_GROUP build-time option.
1296
1297 7. Some older OS have a limit of 256 on the maximum number of file
1298 descriptors. Exim was using setrlimit() to set 1000 as a large value
1299 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1300 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1301
c5fcb476
PH
1302 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1303 was an oversight, and furthermore, ever since the addition of extra
1304 controls (e.g. 4.43/32), the checks on when to allow different forms of
1305 "control" were broken. There should now be diagnostics for all cases when a
1306 control that does not make sense is encountered.
1307
69358f02
PH
1308 9. Added the /retain_sender option to "control=submission".
1309
5be20824
PH
131010. $recipients is now available in the predata ACL (oversight).
1311
eb2c0248
PH
131211. Tidy the search cache before the fork to do a delivery from a message
1313 received from the command line. Otherwise the child will trigger a lookup
1314 failure and thereby defer the delivery if it tries to use (for example) a
1315 cached ldap connection that the parent has called unbind on.
1316
2a3eea10
PH
131712. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1318 of $address_data from the recipient verification was clobbered by the
1319 sender verification.
1320
132113. The value of address_data from a sender verification is now available in
1322 $sender_address_data in subsequent conditions in the ACL statement.
1323
23c7ff99
PH
132414. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1325
4deaf07d
PH
132615. Added a new option "connect=<time>" to callout options, to set a different
1327 connection timeout.
1328
926e1192
PH
132916. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1330 was its contents. (It was OK if the option was not defined at all.)
1331
650edc6f
PH
133217. A "Completed" log line is now written for messages that are removed from
1333 the spool by the -Mrm option.
1334
2c7db3f5
PH
133518. New variables $sender_verify_failure and $recipient_verify_failure contain
1336 information about exactly what failed.
1337
3d235903
PH
133819. Added -dd to debug only the daemon process.
1339
7c7ad977
PH
134020. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1341 handles timeouts, both on the server side and network timeouts. Renamed the
1342 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1343
981756db
PH
134421. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1345 It is now set to "smtps".
1346
d4eb88df
PH
134722. $host_address is now set to the target address during the checking of
1348 ignore_target_hosts.
1349
135023. When checking ignore_target_hosts for an ipliteral router, no host name was
1351 being passed; this would have caused $sender_host_name to have been used if
1352 matching the list had actually called for a host name (not very likely,
1353 since this list is usually IP addresses). A host name is now passed as
1354 "[x.x.x.x]".
1355
7d468ab8
PH
135624. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1357 code that specifies a non-restarting handler (typically sigaction() in
1358 modern systems) in an attempt to fix a rare and obscure crash bug.
1359
136025. Narrowed the window for a race in the daemon that could cause it to ignore
1361 SIGCHLD signals. This is not a major problem, because they are used only to
1362 wake it up if nothing else does.
1363
62c0818f
PH
136426. A malformed maildirsize file could cause Exim to calculate negative values
1365 for the mailbox size or file count. Odd effects could occur as a result.
1366 The maildirsize information is now recalculated if the size or filecount
1367 end up negative.
1368
26034054
PH
136927. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1370 support for a long time. Removed HAVE_SYS_VFS_H.
1371
af66f652
PH
137228. Installed the latest version of exipick from John Jetmore.
1373
90af77f4
PH
137429. In an address list, if the pattern was not a regular expression, an empty
1375 subject address (from a bounce message) matched only if the pattern was an
1376 empty string. Non-empty patterns were not even tested. This was the wrong
1377 because it is perfectly reasonable to use an empty address as part of a
1378 database query. An empty address is now tested by patterns that are
1379 lookups. However, all the other forms of pattern expect the subject to
1380 contain a local part and a domain, and therefore, for them, an empty
1381 address still always fails if the pattern is not itself empty.
1382
d8ef3577
PH
138330. Exim went into a mad DNS loop when attempting to do a callout where the
1384 host was specified on an smtp transport, and looking it up yielded more
1385 than one IP address.
1386
5cb8cbc6
PH
138731. Re-factored the code for checking spool and log partition space into a
1388 function that finds that data and another that does the check. The former
1389 is then used to implement four new variables: $spool_space, $log_space,
1390 $spool_inodes, and $log_inodes.
1391
14702f5b
PH
139232. The RFC2047 encoding function was originally intended for short strings
1393 such as real names; it was not keeping to the 75-character limit for
1394 encoded words that the RFC imposes. It now respects the limit, and
1395 generates multiple encoded words if necessary. To be on the safe side, I
1396 have increased the buffer size for the ${rfc2047: expansion operator from
1397 1024 to 2048 bytes.
1398
063b1e99
PH
139933. It is now permitted to omit both strings after an "if" condition; if the
1400 condition is true, the result is "true". As before, when the second string
1401 is omitted, a false condition yields an empty string. This makes it less
1402 cumbersome to write custom ACL and router conditions.
1403
652e1b65
PH
140434. Failure to deliver a bounce message always caused it to be frozen, even if
1405 there was an errors_to setting on the router. The errors_to setting is now
1406 respected.
1407
6f0c9a4f
PH
140835. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1409 canonical form (fully expanded) before being placed in
1410 $sender_host_address.
1411
33397d19
PH
141236. The table in the code that translates DNS record types into text (T_A to
1413 "A" for instance) was missing entries for NS and CNAME. It is just possible
1414 that this could have caused confusion if both these types were looked up
1415 for the same domain, because the text type is used as part of Exim's
1416 per-process caching. But the chance of anyone hitting this buglet seems
1417 very small.
1418
7bb56e1f
PH
141937. The dnsdb lookup has been extended in a number of ways.
1420
1421 (1) There is a new type, "zns", which walks up the domain tree until it
1422 finds some nameserver records. It should be used with care.
1423
ea3bc19b
PH
1424 (2) There is a new type, "mxh", which is like "mx" except that it returns
1425 just the host names, not the priorities.
1426
1427 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1428 looked up. The behaviour when one of the lookups defers can be
1429 controlled by a keyword.
7bb56e1f 1430
ea3bc19b 1431 (4) It is now possible to specify the separator character for use when
7bb56e1f 1432 multiple records are returned.
33397d19 1433
0bcb2a0e
PH
143438. The dnslists ACL condition has been extended: it is now possible to supply
1435 a list of IP addresses and/or domains to be looked up in a particular DNS
1436 domain.
1437
2ac0e484
PH
143839. Added log_selector=+queue_time_overall.
1439
4e1fde53
PH
144040. When running the queue in the test harness, wait just a tad after forking a
1441 delivery process, to get repeatability of debugging output.
1442
de365ded
PH
144341. Include certificate and key file names in error message when GnuTLS fails
1444 to set them up, because the GnuTLS error message doesn't include the name
1445 of the failing file when there is a problem reading it.
1446
f05da2e8
PH
144742. Allow both -bf and -bF in the same test run.
1448
d6453af2
PH
144943. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1450
f7b63901
PH
145144. The "Exiscan patch" is now merged into the mainline Exim source.
1452
145345. Sometimes the final signoff response after QUIT could fail to get
1454 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1455 < 0 before doing a fflush(). This bug looks as though it goes back to the
1456 introduction of TLS in release 3.20, but "sometimes" must have been rare
1457 because the tests only now provoked it.
1458
a444213a
PH
145946. Reset the locale to "C" after calling embedded Perl, in case it was changed
1460 (this can affect the format of dates).
1461
0ec020ea
PH
146247. exim_tidydb, when checking for the continued existence of a message for
1463 which it has found a message-specific retry record, was not finding
1464 messages that were in split spool directories. Consequently, it was
1465 deleting retry records that should have stayed in existence.
1466
b1206957
PH
146748. Steve fixed some bugs in eximstats.
1468
146949. The SPA authentication driver was not abandoning authentication and moving
1470 on to the next authenticator when an expansion was forced to fail,
1471 contradicting the general specification for all authenticators. Instead it
1472 was generating a temporary error. It now behaves as specified.
1473
26dd5a95
PH
147450. The default ordering of permitted cipher suites for GnuTLS was pessimal
1475 (the order specifies the preference for clients). The order is now AES256,
1476 AES128, 3DES, ARCFOUR128.
1477
343b2385
PH
147851. Small patch to Sieve code - explicitly set From: when generating an
1479 autoreply.
1480
1c5466b9
PH
148152. Exim crashed if a remote delivery caused a very long error message to be
1482 recorded - for instance if somebody sent an entire SpamAssassin report back
1483 as a large number of 550 error lines. This bug was coincidentally fixed by
1484 increasing the size of one of Exim's internal buffers (big_buffer) that
1485 happened as part of the Exiscan merge. However, to be on the safe side, I
1486 have made the code more robust (and fixed the comments that describe what
1487 is going on).
1488
55ee9ee3
PH
148953. Now that there can be additional text after "Completed" in log lines (if
1490 the queue_time_overall log selector is set), a one-byte patch to exigrep
1491 was needed to allow it to recognize "Completed" as not the last thing in
1492 the line.
1493
d38f8232
PH
149454. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1495 patch that reportedly fixes this has been added. I am not expert enough to
1496 create a test for it. This is what the patch creator wrote:
1497
1498 "I found a little strange behaviour of ldap code when working with
1499 Windows 2003 AD Domain, where users was placed in more than one
1500 Organization Units. When I tried to give exim partial DN, the exit code
1501 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1502 But simultaneously result of request was absolutely normal ldap result,
1503 so I produce this patch..."
1504
3295e65b
PH
1505 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1506 REFERENCE, so I have modified the code to exclude the patch when that macro
1507 is not defined.
1508
7102e136
PH
150955. Some experimental protocols are using DNS PTR records for new purposes. The
1510 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1511 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1512 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1513 CAN-2005-0021
7102e136 1514
3ca0ba97
PH
151556. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1516
c2bcbe20
PH
151757. Double the size of the debug message buffer (to 2048) so that more of very
1518 long debug lines gets shown.
1519
18ce445d
PH
152058. The exicyclog utility now does better if the number of log files to keep
1521 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1522
1f5b4c3d
PH
152359. Two changes related to the smtp_active_hostname option:
1524
1525 (1) $smtp_active_hostname is now available as a variable.
1526 (2) The default for smtp_banner uses $smtp_active_hostname instead
1527 of $primary_hostname.
1528
b975ba52
PH
152960. The host_aton() function is supposed to be passed a string that is known
1530 to be a valid IP address. However, in the case of IPv6 addresses, it was
1531 not checking this. This is a hostage to fortune. Exim now panics and dies
1532 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1533 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1534 components; fortuitously, this particular loophole had already been fixed
1535 by change 4.50/55 above.
1536
1537 If there are any other similar loopholes, the new check in host_aton()
1538 itself should stop them being exploited. The report I received stated that
1539 data on the command line could provoke the exploit when Exim was running as
1540 exim, but did not say which command line option was involved. All I could
1541 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1542 running as the user.
ea3a6f44 1543 CAN-2005-0021
85b87bc2
PH
1544
154561. There was a buffer overflow vulnerability in the SPA authentication code
1546 (which came originally from the Samba project). I have added a test to the
1547 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1548 CAN-2005-0022
b975ba52 1549
17ffcae7
PH
155062. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1551 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1552
d95f9fdb
PH
155363. The daemon start-up calls getloadavg() while still root for those OS that
1554 need the first call to be done as root, but it missed one case: when
1555 deliver_queue_load_max is set with deliver_drop_privilege. This is
1556 necessary for the benefit of the queue runner, because there is no re-exec
1557 when deliver_drop_privilege is set.
1558
86b8287f
PH
155964. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1560 This has been fixed.
1561
60dc5e56
PH
156265. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1563 was in use, was not putting the data itself into the right store pool;
1564 consequently, it could be overwritten for a subsequent message in the same
1565 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1566 the caching.)
1567
533244af
PH
156866. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1569
a5a28604
PH
157067. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1571 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1572 the function were treating the return as a boolean value, which happened to
1573 work because 0=false and not-0=true, but is not correct code.
1574
7e634d24
PH
157568. The host_aton() function was not handling scoped IPv6 addresses (those
1576 with, for example, "%eth0" on the end) correctly.
1577
3e11c26b
PH
157869. Fixed some compiler warnings in acl.c for the bitmaps specified with
1579 negated items (that is, ~something) in unsigned ints. Some compilers
1580 apparently mutter when there is no cast.
1581
6729cf78
PH
158270. If an address verification called from an ACL failed, and did not produce a
1583 user-specific message (i.e. there was only a "system" message), nothing was
1584 put in $acl_verify_message. In this situation, it now puts the system
1585 message there.
1586
00f00ca5
PH
158771. Change 4.23/11 added synchronization checking at the start of an SMTP
1588 session; change 4.31/43 added the unwanted input to the log line - except
1589 that it did not do this in the start of session case. It now does.
1590
c9bdd01c
PH
159172. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1592 This is wrong and can cause the other end to generate a synchronization
1593 error if it is another Exim or anything else that does the synchronization
1594 check. A QUIT command is no longer sent after a timeout.
1595
d43194df
PH
159673. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1597 during host lookups.
1598
fe5b5d0b
PH
159974. The defer_ok option of callout verification was not working if it was used
1600 when verifying addresses in header lines, that is, for this case:
1601
1602 verify = header_sender/callout=defer_ok
1603
76a2d7ba
PH
160475. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1605 those file descriptors could be used for SMTP connections. If anything
1606 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1607 could be sent to the SMTP client, causing chaos. The daemon now opens
1608 stdin, stdout, and stderr to /dev/null when it puts itself into the
1609 background.
1610
161176. Arrange for output from Perl's "warn" command to be written to Exim's main
1612 log by default. The user can override this with suitable Perl magic.
1613
04f7d5b9
PH
161477. The use of log_message on a "discard" ACL verb, which is supposed to add to
1615 the log message when discard triggers, was not working for the DATA ACL or
1616 for the non-SMTP ACL.
1617
bc60667e
PH
161878. Error message wording change in sieve.c.
1619
bb6e88ff
PH
162079. If smtp_accept_max_per_host was set, the number of connections could be
1621 restricted to fewer than expected, because the daemon was trying to set up
1622 a new connection before checking whether the processes handling previous
1623 connections had finished. The check for completed processes is now done
1624 earlier. On busy systems, this bug wouldn't be noticed because something
1625 else would have woken the daemon, and it would have reaped the completed
1626 process earlier.
1627
1e70f85b
PH
162880. If a message was submitted locally by a user whose login name contained one
1629 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1630 It caused a spool format error. I have fixed the spool reading code. A
1631 related problem was that the "from" clause in the Received: line became
1632 illegal because of the space(s). It is now covered by ${quote_local_part.
1633
163481. Included the latest eximstats from Steve (adds average sizes to HTML Top
1635 tables).
1636
4e01f9d6
PH
163782. Updated OS/Makefile-AIX as per message from Mike Meredith.
1638
1ee1cef2
PH
163983. Patch from Sieve maintainer to fix unterminated string problem in
1640 "vacation" handling.
1641
6e2b4ccc
PH
164284. Some minor changes to the Linux configuration files to help with other
1643 OS variants using glibc.
1644
8e669ac1
PH
164585. One more patch for Sieve to update vacation handling to latest spec.
1646
495ae4b0 1647
bbe902f0
PH
1648----------------------------------------------------
1649See the note above about the 4.44 and 4.50 releases.
1650----------------------------------------------------
1651
1652
1653Exim version 4.44
1654-----------------
1655
1656 1. Change 4.43/35 introduced a bug that caused file counts to be
1657 incorrectly computed when quota_filecount was set in an appendfile
1658 transport
1659
1660 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1661 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1662 place.
1663
1664 3. Give more explanation in the error message when the command for a transport
1665 filter fails to execute.
1666
1667 4. There are several places where Exim runs a non-Exim command in a
1668 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1669 was being done only for the command run by the queryprogram router. It is
1670 now done for all such subprocesses. The other cases are: ${run, transport
1671 filters, and the commands run by the lmtp and pipe transports.
1672
1673 5. Some older OS have a limit of 256 on the maximum number of file
1674 descriptors. Exim was using setrlimit() to set 1000 as a large value
1675 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1676 systems. I've change it so that if it can't get 1000, it tries for 256.
1677
1678 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1679 was an oversight, and furthermore, ever since the addition of extra
1680 controls (e.g. 4.43/32), the checks on when to allow different forms of
1681 "control" were broken. There should now be diagnostics for all cases when a
1682 control that does not make sense is encountered.
1683
1684 7. $recipients is now available in the predata ACL (oversight).
1685
1686 8. Tidy the search cache before the fork to do a delivery from a message
1687 received from the command line. Otherwise the child will trigger a lookup
1688 failure and thereby defer the delivery if it tries to use (for example) a
1689 cached ldap connection that the parent has called unbind on.
1690
1691 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1692 of $address_data from the recipient verification was clobbered by the
1693 sender verification.
1694
169510. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1696 was its contents. (It was OK if the option was not defined at all.)
1697
169811. A "Completed" log line is now written for messages that are removed from
1699 the spool by the -Mrm option.
1700
170112. $host_address is now set to the target address during the checking of
1702 ignore_target_hosts.
1703
170413. When checking ignore_target_hosts for an ipliteral router, no host name was
1705 being passed; this would have caused $sender_host_name to have been used if
1706 matching the list had actually called for a host name (not very likely,
1707 since this list is usually IP addresses). A host name is now passed as
1708 "[x.x.x.x]".
1709
171014. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1711 code that specifies a non-restarting handler (typically sigaction() in
1712 modern systems) in an attempt to fix a rare and obscure crash bug.
1713
171415. Narrowed the window for a race in the daemon that could cause it to ignore
1715 SIGCHLD signals. This is not a major problem, because they are used only to
1716 wake it up if nothing else does.
1717
171816. A malformed maildirsize file could cause Exim to calculate negative values
1719 for the mailbox size or file count. Odd effects could occur as a result.
1720 The maildirsize information is now recalculated if the size or filecount
1721 end up negative.
1722
172317. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1724 support for a long time. Removed HAVE_SYS_VFS_H.
1725
ea3a6f44 172618. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1727
172819. Allow an empty sender to be matched against a lookup in an address list.
1729 Previously the only cases considered were a regular expression, or an
1730 empty pattern.
1731
173220. Exim went into a mad DNS lookup loop when doing a callout where the
1733 host was specified on the transport, if the DNS lookup yielded more than
1734 one IP address.
1735
ea3a6f44
NM
173621. The RFC2047 encoding function was originally intended for short strings
1737 such as real names; it was not keeping to the 75-character limit for
1738 encoded words that the RFC imposes. It now respects the limit, and
1739 generates multiple encoded words if necessary. To be on the safe side, I
1740 have increased the buffer size for the ${rfc2047: expansion operator from
1741 1024 to 2048 bytes.
bbe902f0 1742
ea3a6f44
NM
174322. Failure to deliver a bounce message always caused it to be frozen, even if
1744 there was an errors_to setting on the router. The errors_to setting is now
1745 respected.
bbe902f0
PH
1746
174723. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1748 canonical form (fully expanded) before being placed in
1749 $sender_host_address.
1750
175124. Updated eximstats to version 1.33
1752
ea3a6f44
NM
175325. Include certificate and key file names in error message when GnuTLS fails
1754 to set them up, because the GnuTLS error message doesn't include the name
1755 of the failing file when there is a problem reading it.
bbe902f0
PH
1756
175726. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1758 As per change 25.
bbe902f0 1759
ea3a6f44
NM
176027. Reset the locale to "C" after calling embedded Perl, in case it was changed
1761 (this can affect the format of dates).
bbe902f0 1762
ea3a6f44
NM
176328. exim_tidydb, when checking for the continued existence of a message for
1764 which it has found a message-specific retry record, was not finding
1765 messages that were in split spool directories. Consequently, it was
1766 deleting retry records that should have stayed in existence.
bbe902f0
PH
1767
176829. eximstats updated to version 1.35
1769 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1770 1.35 - bugfix such that pie charts by volume are generated correctly
1771
ea3a6f44
NM
177230. The SPA authentication driver was not abandoning authentication and moving
1773 on to the next authenticator when an expansion was forced to fail,
1774 contradicting the general specification for all authenticators. Instead it
1775 was generating a temporary error. It now behaves as specified.
bbe902f0 1776
ea3a6f44
NM
177731. The default ordering of permitted cipher suites for GnuTLS was pessimal
1778 (the order specifies the preference for clients). The order is now AES256,
1779 AES128, 3DES, ARCFOUR128.
bbe902f0 1780
ea3a6f44
NM
178131. Small patch to Sieve code - explicitly set From: when generating an
1782 autoreply.
bbe902f0 1783
ea3a6f44
NM
178432. Exim crashed if a remote delivery caused a very long error message to be
1785 recorded - for instance if somebody sent an entire SpamAssassin report back
1786 as a large number of 550 error lines. This bug was coincidentally fixed by
1787 increasing the size of one of Exim's internal buffers (big_buffer) that
1788 happened as part of the Exiscan merge. However, to be on the safe side, I
1789 have made the code more robust (and fixed the comments that describe what
1790 is going on).
bbe902f0 1791
ea3a6f44
NM
179233. Some experimental protocols are using DNS PTR records for new purposes. The
1793 keys for these records are domain names, not reversed IP addresses. The
1794 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1795 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1796 CAN-2005-0021
1797
ea3a6f44
NM
179834. The host_aton() function is supposed to be passed a string that is known
1799 to be a valid IP address. However, in the case of IPv6 addresses, it was
1800 not checking this. This is a hostage to fortune. Exim now panics and dies
1801 if the condition is not met. A case was found where this could be provoked
1802 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1803 components; fortuitously, this particular loophole had already been fixed
1804 by change 4.50/55 or 4.44/33 above.
1805
1806 If there are any other similar loopholes, the new check in host_aton()
1807 itself should stop them being exploited. The report I received stated that
1808 data on the command line could provoke the exploit when Exim was running as
1809 exim, but did not say which command line option was involved. All I could
1810 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1811 running as the user.
bbe902f0
PH
1812 CAN-2005-0021
1813
ea3a6f44
NM
181435. There was a buffer overflow vulnerability in the SPA authentication code
1815 (which came originally from the Samba project). I have added a test to the
1816 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1817 CAN-2005-0022
1818
ea3a6f44
NM
181936. The daemon start-up calls getloadavg() while still root for those OS that
1820 need the first call to be done as root, but it missed one case: when
1821 deliver_queue_load_max is set with deliver_drop_privilege. This is
1822 necessary for the benefit of the queue runner, because there is no re-exec
1823 when deliver_drop_privilege is set.
bbe902f0 1824
ea3a6f44
NM
182537. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1826 was in use, was not putting the data itself into the right store pool;
1827 consequently, it could be overwritten for a subsequent message in the same
1828 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1829 the caching.)
bbe902f0 1830
ea3a6f44
NM
183138. Sometimes the final signoff response after QUIT could fail to get
1832 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1833 < 0 before doing a fflush(). This bug looks as though it goes back to the
1834 introduction of TLS in release 3.20, but "sometimes" must have been rare
1835 because the tests only now provoked it.
bbe902f0
PH
1836
1837
495ae4b0
PH
1838Exim version 4.43
1839-----------------
1840
1841 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1842 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1843 Now it returns an integer. A number of calls were still expecting a T/F
1844 return. Fortuitously, in all cases, the tests worked in OK situations,
1845 which is the norm. However, things would have gone wrong on any write
1846 failures on the smtp file descriptor. This function is used when sending
1847 messages over SMTP and also when doing verify callouts.
1848
1849 2. When Exim is called to do synchronous delivery of a locally submitted
1850 message (the -odf or -odi options), it no longer closes stderr before doing
1851 the delivery.
1852
1853 3. Implemented the mua_wrapper option.
1854
1855 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1856
1857 5. Implemented the functions header_remove(), header_testname(),
1858 header_add_at_position(), and receive_remove_recipient(), and exported them
1859 to local_scan().
1860
1861 6. If an ACL "warn" statement specified the addition of headers, Exim already
1862 inserted X-ACL-Warn: at the start if there was no header name. However, it
1863 was not making this test for the second and subsequent header lines if
1864 there were newlines in the string. This meant that an invalid header could
1865 be inserted if Exim was badly configured.
1866
1867 7. Allow an ACL "warn" statement to add header lines at the start or after all
1868 the Received: headers, as well as at the end.
1869
1870 8. Added the rcpt_4xx retry error code.
1871
1872 9. Added postmaster_mailfrom=xxx to callout verification option.
1873
187410. Added mailfrom=xxxx to the callout verification option, for verify=
1875 header_sender only.
1876
187711. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1878 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1879
188012. Inserted some casts to stop certain compilers warning when using pointer
1881 differences as field lengths or precisions in printf-type calls (mostly
1882 affecting debugging statements).
1883
188413. Added optional readline() support for -be (dynamically loaded).
1885
188614. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1887 same clock tick as a message's arrival, so that its received time was the
1888 same as the "first fail" time on the retry record, and that message
1889 remained on the queue past the ultimate address timeout, every queue runner
1890 would try a delivery (because it was past the ultimate address timeout) but
1891 after another failure, the ultimate address timeout, which should have then
1892 bounced the address, did not kick in. This was a "< instead of <=" error;
1893 in most cases the first failure would have been in the next clock tick
1894 after the received time, and all would be well.
1895
189615. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1897 being recognized when the domain list was tested by the match_domain
1898 condition in an expansion string.
1899
190016. Added the ${str2b64: operator.
1901
190217. Exim was always calling setrlimit() to set a large limit for the number of
1903 processes, without checking whether the existing limit was already
1904 adequate. (It did check for the limit on file descriptors.) Furthermore,
1905 errors from getrlimit() and setrlimit() were being ignored. Now they are
1906 logged to the main and panic logs, but Exim does carry on, to try to do its
1907 job under whatever limits there are.
1908
190918. Imported PCRE 5.0.
1910
191119. Trivial typo in log message " temporarily refused connection" (the leading
1912 space).
1913
191420. If the log selector return_path_on_delivery was set and an address was
1915 redirected to /dev/null, the delivery process crashed because it assumed
1916 that a return path would always be set for a "successful" delivery. In this
1917 case, the whole delivery is bypassed as an optimization, and therefore no
1918 return path is set.
1919
192021. Internal re-arrangement: the function for sending a challenge and reading
1921 a response while authentication was assuming a zero-terminated challenge
1922 string. It's now changed to take a pointer and a length, to allow for
1923 binary data in such strings.
1924
192522. Added the cyrus_sasl authenticator (code supplied by MBM).
1926
192723. Exim was not respecting finduser_retries when seeking the login of the
1928 uid under which it was called; it was always trying 10 times. (The default
1929 setting of finduser_retries is zero.) Also, it was sleeping after the final
1930 failure, which is pointless.
1931
193224. Implemented tls_on_connect_ports.
1933
193425. Implemented acl_smtp_predata.
1935
193626. If the domain in control=submission is set empty, Exim assumes that the
1937 authenticated id is a complete email address when it generates From: or
1938 Sender: header lines.
1939
194027. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1941 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1942 chown and chgrp in /bin and hostname in /usr/bin.
1943
194428. Exim was keeping the "process log" file open after each use, just as it
1945 does for the main log. This opens the possibility of it remaining open for
1946 long periods when the USR1 signal hits a daemon. Occasional processlog
1947 errors were reported, that could have been caused by this. Anyway, it seems
1948 much more sensible not to leave this file open at all, so that is what now
1949 happens.
1950
195129. The long-running daemon process does not normally write to the log once it
1952 has entered its main loop, and it closes the log before doing so. This is
1953 so that log files can straightforwardly be renamed and moved. However,
1954 there are a couple of unusual error situations where the daemon does write
1955 log entries, and I had neglected to close the log afterwards.
1956
195730. The text of an SMTP error response that was received during a remote
1958 delivery was being truncated at 512 bytes. This is too short for some of
1959 the long messages that one sometimes sees. I've increased the limit to
1960 1024.
1961
196231. It is now possible to make retry rules that apply only when a message has a
1963 specific sender, in particular, an empty sender.
1964
196532. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1966 it possible to be selective about when SMTP synchronization is enforced.
1967
196833. Added "control = caseful_local_part" and "control = "caselower_local_part".
1969
197032. Implemented hosts_connection_nolog.
1971
197233. Added an ACL for QUIT.
1973
197434. Setting "delay_warning=" to disable warnings was not working; it gave a
1975 syntax error.
1976
197735. Added mailbox_size and mailbox_filecount to appendfile.
1978
197936. Added control = no_multiline_responses to ACLs.
1980
198137. There was a bug in the logic of the code that waits for the clock to tick
1982 in the case where the clock went backwards by a substantial amount such
1983 that the microsecond fraction of "now" was more than the microsecond
1984 fraction of "then" (but the whole seconds number was less).
1985
198638. Added support for the libradius Radius client library this is found on
1987 FreeBSD (previously only the radiusclient library was supported).
1988
1989
1990Exim version 4.42
1991-----------------
1992
1993 1. When certain lookups returned multiple values in the form name=value, the
1994 quoting of the values was not always being done properly. Specifically:
1995 (a) If the value started with a double quote, but contained no whitespace,
1996 it was not quoted.
1997 (b) If the value contained whitespace other than a space character (i.e.
1998 tabs or newlines or carriage returns) it was not quoted.
1999 This fix has been applied to the mysql and pgsql lookups by writing a
2000 separate quoting function and calling it from the lookup code. The fix
2001 should probably also be applied to nisplus, ibase and oracle lookups, but
2002 since I cannot test any of those, I have not disturbed their existing code.
2003
2004 2. A hit in the callout cache for a specific address caused a log line with no
2005 reason for rejecting RCPT. Now it says "Previous (cached) callout
2006 verification failure".
2007
2008 3. There was an off-by-one bug in the queryprogram router. An over-long
2009 return line was truncated at 256 instead of 255 characters, thereby
2010 overflowing its buffer with the terminating zero. As well as fixing this, I
2011 have increased the buffer size to 1024 (and made a note to document this).
2012
2013 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2014 when Exim is waiting for an SMTP response from a remote server, Exim
2015 restarts its select() call on the socket, thereby resetting its timeout.
2016 This is not a problem when such interrupts are rare. Somebody set up a cron
2017 job to run exiwhat every 2 minutes, which is less than the normal select()
2018 timeout (5 or 10 minutes). This meant that the select() timeout never
2019 kicked in because it was always reset. I have fixed this by comparing the
2020 time when an interrupt arrives with the time at the start of the first call
2021 to select(). If more time than the timeout has elapsed, the interrupt is
2022 treated as a timeout.
2023
2024 5. Some internal re-factoring in preparation for the addition of Sieve
2025 extensions (by MH). In particular, the "personal" test is moved to a
2026 separate function, and given an option for scanning Cc: and Bcc: (which is
2027 not set for Exim filters).
2028
2029 6. When Exim created an email address using the login of the caller as the
2030 local part (e.g. when creating a From: or Sender: header line), it was not
2031 quoting the local part when it contained special characters such as @.
2032
2033 7. Installed new OpenBSD configuration files.
2034
2035 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2036 try to make them clearer.
2037
2038 9. Callout options, other than the timeout value, were being ignored when
2039 verifying sender addresses in header lines. For example, when using
2040
2041 verify = header_sender/callout=no_cache
2042
2043 the cache was (incorrectly) being used.
2044
204510. Added a missing instance of ${EXE} to the exim_install script; this affects
2046 only the Cygwin environment.
2047
204811. When return_path_on_delivery was set as a log selector, if different remote
2049 addresses in the same message used different return paths and parallel
2050 remote delivery occurred, the wrong values would sometimes be logged.
2051 (Whenever a remote delivery process finished, the return path value from
2052 the most recently started remote delivery process was logged.)
2053
205412. RFC 3848 specifies standard names for the "with" phrase in Received: header
2055 lines when AUTH and/or TLS are in use. This is the "received protocol"
2056 field. Exim used to use "asmtp" for authenticated SMTP, without any
2057 indication (in the protocol name) for TLS use. Now it follows the RFC and
2058 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2059 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2060 names appear in log lines as well as in Received: header lines.
2061
206213. Installed MH's patches for Sieve to add the "copy" and "vacation"
2063 extensions, and comparison tests, and to fix some bugs.
2064
206514. Changes to the "personal" filter test:
2066
2067 (1) The test was buggy in that it was just doing the equivalent of
2068 "contains" tests on header lines. For example, if a user's address was
2069 anne@some.where, the "personal" test would incorrectly be true for
2070
2071 To: susanne@some.where
2072
2073 This test is now done by extracting each address from the header in turn,
2074 and checking the entire address. Other tests that are part of "personal"
2075 are now done using regular expressions (for example, to check local parts
2076 of addresses in From: header lines).
2077
2078 (2) The list of non-personal local parts in From: addresses has been
2079 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2080 taken from the Sieve specification recommendations.
2081
2082 (3) If the message contains any header line starting with "List-" it is
2083 treated as non-personal.
2084
2085 (4) The test for "circular" in the Subject: header line has been removed
2086 because it now seems ill-conceived.
2087
208815. Minor typos in src/EDITME comments corrected.
2089
209016. Installed latest exipick from John Jetmore.
2091
209217. If headers_add on a router specified a text string that was too long for
2093 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2094 of string_sprintf() is now avoided.
2095
209618. $message_body_size was not set (it was always zero) when running the DATA
2097 ACL and the local_scan() function.
2098
209919. For the "mail" command in an Exim filter, no default was being set for
2100 the once_repeat time, causing a random time value to be used if "once" was
2101 specified. (If the value happened to be <= 0, no repeat happened.) The
2102 default is now 0s, meaning "never repeat". The "vacation" command was OK
2103 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2104 (I found it when inspecting the code).
2105
210620. There is now an overall timeout for performing a callout verification. It
2107 defaults to 4 times the callout timeout, which applies to individual SMTP
2108 commands during the callout. The overall timeout applies when there is more
2109 than one host that can be tried. The timeout is checked before trying the
2110 next host. This prevents very long delays if there are a large number of
2111 hosts and all are timing out (e.g. when the network connections are timing
2112 out). The value of the overall timeout can be changed by specifying an
2113 additional sub-option for "callout", called "maxwait". For example:
2114
2115 verify = sender/callout=5s,maxwait=20s
2116
211721. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2118 to the end before writing, but this should make it even safer).
2119
212022. Exim was forgetting that it had advertised PIPELINING for the second and
2121 subsequent messages on an SMTP connection. It was also not resetting its
2122 memory on STARTTLS and an internal HELO.
2123
212423. When Exim logs an SMTP synchronization error within a session, it now
2125 records whether PIPELINING has been advertised or not.
2126
212724. Added 3 instances of "(long int)" casts to time_t variables that were being
2128 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2129 rather than long int.
2130
213125. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2132
213326. Added the never_mail option to autoreply.
2134
2135
2136Exim version 4.41
2137-----------------
2138
2139 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2140 crash if the getsockname() call failed; this can happen if a connection is
2141 closed very soon after it is established. The problem was simply in the
2142 order in which certain operations were done, causing Exim to try to write
2143 to the SMTP stream before it had set up the file descriptor. The bug has
2144 been fixed by making things happen in the correct order.
2145
2146
2147Exim version 4.40
2148-----------------
2149
2150 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2151 before the connection was closed, thus losing the rejection response.
2152
2153 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2154 some early Solaris releases, but causes trouble in current releases where
2155 socklen_t is defined.
2156
2157 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2158 always exist.
2159
2160 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2161 configured.
2162
2163 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2164 that releasing the top of it at the end releases what was used for sub-
2165 expansions (unless the block got too big). However, discard this block if
2166 the first thing is a variable or header, so that we can use its block when
2167 it is dynamic (useful for very large $message_headers, for example).
2168
2169 6. Lookups now cache *every* query, not just the most recent. A new, separate
2170 store pool is used for this. It can be recovered when all lookup caches are
2171 flushed. Lookups now release memory at the end of their result strings.
2172 This has involved some general refactoring of the lookup sources.
2173
2174 7. Some code has been added to the store_xxx() functions to reduce the amount
2175 of flapping under certain conditions.
2176
2177 8. log_incoming_interface used to affect only the <= reception log lines. Now
2178 it causes the local interface and port to be added to several more SMTP log
2179 lines, for example "SMTP connection from", and rejection lines.
2180
2181 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2182
218310. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2184
218511. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2186 could be overwritten at the end of the current message (or the start of a
2187 new message if it was set in a HELO ACL). The value is now preserved for
2188 the duration of the SMTP connection.
2189
219012. If a transport had a headers_rewrite setting, and a matching header line
2191 contained an unqualified address, that address was qualified, even if it
2192 did not match any rewriting rules. The underlying bug was that the values
2193 of the flags that permit the existence of unqualified sender and recipient
2194 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2195 non-local messages, and by -bnq for local messages) were not being
2196 preserved with the message after it was received.
2197
219813. When Exim was logging an SMTP synchronization error, it could sometimes log
2199 "next input=" as part of the text comprising the host identity instead of
2200 the correct text. The code was using the same buffer for two different
2201 strings. However, depending on which order the printing function evaluated
2202 its arguments, the bug did not always show up. Under Linux, for example, my
2203 test suite worked just fine.
2204
220514. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2206 doesn't work with some older versions of Perl. It has been changed to "my",
2207 which in any case is probably the better facility to use.
2208
220915. A really picky compiler found some instances of statements for creating
2210 error messages that either had too many or two few arguments for the format
2211 string.
2212
221316. The size of the buffer for calls to the DNS resolver has been increased
2214 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2215 for addresses that have a lot of PTR records. This alleviates a problem; it
2216 does not fully solve it.
2217
221817. A dnsdb lookup for PTR records that receives more data than will fit in the
2219 buffer now truncates the list and logs the incident, which is the same
2220 action as happens when Exim is looking up a host name and its aliases.
2221 Previously in this situation something unpredictable would happen;
2222 sometimes it was "internal error: store_reset failed".
2223
222418. If a server dropped the connection unexpectedly when an Exim client was
2225 using GnuTLS and trying to read a response, the client delivery process
2226 crashed while trying to generate an error log message.
2227
222819. If a "warn" verb in an ACL added multiple headers to a message in a single
2229 string, for example:
2230
2231 warn message = H1: something\nH2: something
2232
2233 the text was added as a single header line from Exim's point of view
2234 though it ended up OK in the delivered message. However, searching for the
2235 second and subsequent header lines using $h_h2: did not work. This has been
2236 fixed. Similarly, if a system filter added multiple headers in this way,
2237 the routers could not see them.
2238
223920. Expanded the error message when iplsearch is called with an invalid key to
2240 suggest using net-iplsearch in a host list.
2241
224221. When running tests using -bh, any delays imposed by "delay" modifiers in
2243 ACLs are no longer actually imposed (and a message to that effect is
2244 output).
2245
224622. If a "gecos" field in a passwd entry contained escaped characters, in
2247 particular, if it contained a \" sequence, Exim got it wrong when building
2248 a From: or a Sender: header from that name. A second bug also caused
2249 incorrect handling when an unquoted " was present following a character
2250 that needed quoting.
2251
225223. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2253 was not being matched caselessly.
2254
225524. Arranged for all hyphens in the exim.8 source to be escaped with
2256 backslashes.
2257
225825. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2259 properly. Recipient callout cache records were still being keyed to include
2260 the sender, even when use_sender was set false. This led to far more
2261 callouts that were necessary. The sender is no longer included in the key
2262 when use_sender is false.
2263
226426. Added "control = submission" modifier to ACLs.
2265
226627. Added the ${base62d: operator to decode base 62 numbers.
2267
226828. dnsdb lookups can now access SRV records.
2269
227029. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2271 the configuration file.
2272
227330. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2274 (-v) mode. This makes the output for a verbose queue run more intelligible.
2275
227631. Added a use_postmaster feature to recipient callouts.
2277
227832. Added the $body_zerocount variable, containing the number of binary zero
2279 bytes in the message body.
2280
228133. The time of last modification of the "new" subdirectory is now used as the
2282 "mailbox time last read" when there is a quota error for a maildir
2283 delivery.
2284
228534. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2286
228735. Added +ignore_unknown as a special item in host lists.
2288
228936. Code for decoding IPv6 addresses in host lists is now included, even if
2290 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2291 address was recognized as an IP address, but was then not correctly decoded
2292 into binary, causing unexpected and incorrect effects when compared with
2293 another IP address.
2294
2295
2296Exim version 4.34
2297-----------------
2298
2299 1. Very minor rewording of debugging text in manualroute to say "list of
2300 hosts" instead of "hostlist".
2301
2302 2. If verify=header_syntax was set, and a header line with an unqualified
2303 address (no domain) and a large number of spaces between the end of the
2304 name and the colon was received, the reception process suffered a buffer
2305 overflow, and (when I tested it) crashed. This was caused by some obsolete
2306 code that should have been removed. The fix is to remove it!
2307
2308 3. When running in the test harness, delay a bit after writing a bounce
2309 message to get a bit more predictability in the log output.
2310
2311 4. Added a call to search_tidyup() just before forking a reception process. In
2312 theory, someone could use a lookup in the expansion of smtp_accept_max_
2313 per_host which, without the tidyup, could leave open a database connection.
2314
2315 5. Added the variables $recipient_data and $sender_data which get set from a
2316 lookup success in an ACL "recipients" or "senders" condition, or a router
2317 "senders" option, similar to $domain_data and $local_part_data.
2318
2319 6. Moved the writing of debug_print from before to after the "senders" test
2320 for routers.
2321
2322 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2323 problems for message scanning, either using a data ACL, or using
2324 local_scan() because the Received: header was not generated till after they
2325 were called (in order to set the time as the time of reception completion).
2326 I have revised the way this works. The header is now generated after the
2327 body is received, but before the ACL or local_scan() are called. After they
2328 are run, the timestamp in the header is updated.
2329
2330
2331Exim version 4.33
2332-----------------
2333
2334 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2335 before starting a queue runner without re-exec. This happened only when
2336 deliver_drop_privilege was set or when the Exim user was set to root. The
2337 effect of the bug was that timeouts during subsequent deliveries caused
2338 crashes instead of being properly handled. The handler is now left at its
2339 default (and expected) setting.
2340
2341 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2342 message, again when deliver_drop_privilege is set or Exim is run as root.
2343 The bug described in (1) was not present in this case, but the tidying up
2344 of the other signals was missing. I have made the two cases consistent.
2345
2346 3. The ignore_target_hosts setting on a manualroute router was being ignored
2347 for hosts that were looked up using the /MX notation.
2348
2349 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2350 in domain lists.
2351
2352 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2353 operated on the sender address. After changing the $sender_address to <>
2354 for the sender address verify, Exim was re-instated it as the original
2355 (before rewriting) address, but remembering that it had rewritten it, so it
2356 wasn't rewriting it again. This bug also had the effect of breaking the
2357 sender address verification caching when the sender address was rewritten.
2358
2359 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2360 This has been changed so that if the ip literal address matches
2361 ignore_target_hosts, the router declines.
2362
2363 7. Added expansion conditions match_domain, match_address, and match_local_
2364 part (NOT match_host).
2365
2366 8. The placeholder for the Received: header didn't have a length field set.
2367
2368 9. Added code to Exim itself and to exim_lock to test for a specific race
2369 condition that could lead to file corruption when using MBX delivery. The
2370 issue is with the lockfile that is created in /tmp. If this file is removed
2371 after a process has opened it but before that process has acquired a lock,
2372 there is the potential for a second process to recreate the file and also
2373 acquire a lock. This could lead to two Exim processes writing to the file
2374 at the same time. The added code performs the same test as UW imapd; it
2375 checks after acquiring the lock that its file descriptor still refers to
2376 the same named file.
2377
237810. The buffer for building added header lines was of fixed size, 8192 bytes.
2379 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2380 when Exim is built.
2381
238211. Added the smtp_active_hostname option. If used, this will typically be made
2383 to depend on the incoming interface address. Because $interface_address is
2384 not set up until the daemon has forked a reception process, error responses
2385 that can happen earlier (such as "too many connections") no longer contain
2386 a host name.
2387
238812. If an expansion in a condition on a "warn" statement fails because a lookup
2389 defers, the "warn" statement is abandoned, and the next ACL statement is
2390 processed. Previously this caused the whole ACL to be aborted.
2391
239213. Added the iplsearch lookup type.
2393
239414. Added ident_timeout as a log selector.
2395
239615. Added tls_certificate_verified as a log selector.
2397
239816. Added a global option tls_require_ciphers (compare the smtp transport
2399 option of the same name). This controls incoming TLS connections.
2400
240117. I finally figured out how to make tls_require_ciphers do a similar thing
2402 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2403 before starting the TLS session.
2404
240518. Tabs are now shown as \t in -bP output.
2406
240719. If the log selector return_path_on_delivery was set, Exim crashed when
2408 bouncing a message because it had too many Received: header lines.
2409
241020. If two routers both had headers_remove settings, and the first one included
2411 a superfluous trailing colon, the final name in the first list and the
2412 first name in the second list were incorrectly joined into one item (with a
2413 colon in the middle).
2414
2415
2416Exim version 4.32
2417-----------------
2418
2419 1. Added -C and -D options to the exinext utility, mainly to make it easier
2420 to include in the automated testing, but these could be helpful when
2421 multiple configurations are in use.
2422
2423 2. The exinext utility was not formatting the output nicely when there was
2424 an alternate port involved in the retry record key, nor when there was a
2425 message id as well (for retries that were specific to a specific message
2426 and a specific host). It was also confused by IPv6 addresses, because of
2427 the additional colons they contain. I have fixed the IPv4 problem, and
2428 patched it up to do a reasonable job for IPv6.
2429
2430 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2431 delivery, the log line now contains "pipelined" if PIPELINING was used.
2432
2433 4. An SMTP transport process used to panic and die if the bind() call to set
2434 an explicit outgoing interface failed. This has been changed; it is now
2435 treated in the same way as a connect() failure.
2436
2437 5. A reference to $sender_host_name in the part of a conditional expansion
2438 that was being skipped was still causing a DNS lookup. This no longer
2439 occurs.
2440
2441 6. The def: expansion condition was not recognizing references to header lines
2442 that used bh_ and bheader_.
2443
2444 7. Added the _cache feature to named lists.
2445
2446 8. The code for checking quota_filecount in the appendfile transport was
2447 allowing one more file than it should have been.
2448
2449 9. For compatibility with Sendmail, the command line option
2450
2451 -prval:sval
2452
2453 is equivalent to
2454
2455 -oMr rval -oMs sval
2456
2457 and sets the incoming protocol and host name (for trusted callers). The
2458 host name and its colon can be omitted when only the protocol is to be set.
2459 Note the Exim already has two private options, -pd and -ps, that refer to
2460 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2461 "s", but I don't think that's a major issue.
2462
246310. A number of refactoring changes to the code, none of which should affect
2464 Exim's behaviour:
2465
2466 (a) The number of logging options was getting close to filling up the
2467 32-bit word that was used as a bit map. I have split them into two classes:
2468 those that are passed in the argument to log_write(), and those that are
2469 only ever tested independently outside of that function. These are now in
2470 separate 32-bit words, so there is plenty of room for expansion again.
2471 There is no change in the user interface or the logging behaviour.
2472
2473 (b) When building, for example, log lines, the code previously used a
2474 macro that called string_cat() twice, in order to add two strings. This is
2475 not really sufficiently general. Furthermore, there was one instance where
2476 it was actually wrong because one of the argument was used twice, and in
2477 one call a function was used. (As it happened, calling the function twice
2478 did not affect the overall behaviour.) The macro has been replaced by a
2479 function that can join an arbitrary number of extra strings onto a growing
2480 string.
2481
2482 (c) The code for expansion conditions now uses a table and a binary chop
2483 instead of a serial search (which was left over from when there were very
2484 few conditions). Also, it now recognizes conditions like "pam" even when
2485 the relevant support is not compiled in: a suitably worded error message is
2486 given if an attempt is made to use such a condition.
2487
248811. Added ${time_interval:xxxxx}.
2489
249012. A bug was causing one of the ddress fields not to be passed back correctly
2491 from remote delivery subprocesses. The field in question was not being
2492 subsequently used, so this caused to problems in practice.
2493
249413. Added new log selectors queue_time and deliver_time.
2495
249614. Might have fixed a bug in maildirsizefile handling that threw up
2497 "unexpected character" debug warnings, and recalculated the data
2498 unnecessarily. In any case, I expanded the warning message to give more
2499 information.
2500
250115. Added the message "Restricted characters in address" to the statements in
2502 the default ACL that block characters like @ and % in local parts.
2503
250416. Change 71 for release 4.31 proved to be much less benign that I imagined.
2505 Three changes have been made:
2506
2507 (a) There was a serious bug; a negative response to MAIL caused the whole
2508 recipient domain to be cached as invalid, thereby blocking all messages
2509 to all local parts at the same domain, from all senders. This bug has
2510 been fixed. The domain is no longer cached after a negative response to
2511 MAIL if the sender used is not empty.
2512
2513 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2514 been restored.
2515
2516 (c) A new callout option, "use_sender" has been added for people who want
2517 the modified behaviour.
2518
2519
2520Exim version 4.31
2521-----------------
2522
2523 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2524 Larry Rosenman.
2525
2526 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2527 indeed breaks things for older releases.
2528
2529 3. Added additional logging to the case where there is a problem reading data
2530 from a filter that is running in a subprocess using a pipe, in order to
2531 try to track down a specific problem.
2532
2533 4. Testing facility fudge: when running in the test harness and attempting
2534 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2535 getting "No route to host". Convert this to a timeout.
2536
2537 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2538 warning.
2539
2540 6. Some OS don't have socklen_t but use size_t instead. This affects the
2541 fifth argument of getsockopt() amongst other things. This is now
2542 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2543 can be set for individual OS. I have set it for SunOS5, OSF1, and
2544 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2545 some earlier ones do not.
2546
2547 7. Change 4.30/15 was not doing the test caselessly.
2548
2549 8. The standard form for an IPv6 address literal was being rejected by address
2550 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2551 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2552 this, as well as the form without the "IPv6" on the front (but only when
2553 address literals are enabled, of course).
2554
2555 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2556
255710. Exim crashed if a message with an empty sender address specified by -f
2558 encountered a router with an errors_to setting. This could be provoked only
2559 by a command such as
2560
2561 exim -f "" ...
2562
2563 where an empty string was supplied; "<>" did not hit this bug.
2564
256511. Installed PCRE release 4.5.
2566
256712. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2568 remained set. It is now erased.
2569
257013. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2571 times from message ids (which are base 36 rather than the normal 62).
2572
257314. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2574 were being counted as actual protocol errors, and logged if the log
2575 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2576 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2577 and DATA following a set of rejected RCPTs do not count as protocol errors.
2578 In other words, Exim assumes they were pipelined, though this may not
2579 actually be the case. Of course, in all cases the client gets an
2580 appropriate error code.
2581
258215. If a lookup fails in an ACL condition, a message about the failure may
2583 be available; it is used if testing the ACL cannot continue, because most
2584 such messages specify what the cause of the deferral is. However, some
2585 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2586 that caused an old message to be retained and used if a later statement
2587 caused a defer, replacing the real cause of the deferral.
2588
258916. If an IP address had so many PTR records that the DNS lookup buffer
2590 was not large enough to hold them, Exim could crash while trying to process
2591 the truncated data. It now detects and logs this case.
2592
259317. Further to 4.21/58, another change has been made: if (and only if) the
2594 first line of a message (the first header line) ends with CRLF, a bare LF
2595 in a subsequent header line has a space inserted after it, so as not to
2596 terminate the header.
2597
259818. Refactoring: tidied an ugly bit of code in appendfile that copied data
2599 unnecessarily, used atoi() instead of strtol(), and didn't check the
2600 termination when getting file sizes from file names by regex.
2601
260219. Completely re-implemented the support for maildirsize files, in the light
2603 of a number of problems with the previous contributed implementation
2604 (4.30/29). In particular:
2605
2606 . If the quota is zero, the maildirsize file is maintained, but no quota is
2607 imposed.
2608
2609 . If the maildir directory does not exist, it is created before any attempt
2610 to write a maildirsize file.
2611
2612 . The quota value in the file is just a cache; if the quota is changed in
2613 the transport, the new value overrides.
2614
2615 . A regular expression is available for excluding directories from the
2616 count.
2617
261820. The autoreply transport checks the characters in options that define the
2619 message's headers; it allows continued headers, but it was checking with
2620 isspace() after an embedded newline instead of explicitly looking for a
2621 space or a tab.
2622
262321. If all the "regular" hosts to which an address was routed had passed their
2624 expiry times, and had not reached their retry times, the address was
2625 bounced, even if fallback hosts were defined. Now Exim should go on to try
2626 the fallback hosts.
2627
262822. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2629 equivalent code in the SMTP transport. Some hosts send humungous responses
2630 to HELO/EHLO, more than 1024 it seems.
2631
263223. Refactoring: code in filter.c used (void *) for "any old type" but this
2633 gives compiler warnings in some environments. I've now done it "properly",
2634 using a union.
2635
263624. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2637 (because of problems with the built-in one) was declared to return uschar *
2638 instead of char *, causing compiler failure.
2639
264025. Fixed a file descriptor leak when processing alias/forward files.
2641
264226. Fixed a minor format string issue in dbfn.c.
2643
264427. Typo in exim.c: ("dmbnz" for "dbmnz").
2645
264628. If a filter file refered to $h_xxx or $message_headers, and the headers
2647 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2648 become corrupted.
2649
265029. When a sender address is verified, it is cached, to save repeating the test
2651 when there is more than one recipient in a message. However, when the
2652 verification involves a callout, it is possible for different callout
2653 options to be set for different recipients. It is too complicated to keep
2654 track of this in the cache, so now Exim always runs a verification when a
2655 callout is required, relying on the callout cache for the optimization.
2656 The overhead is duplication of the address routing, but this should not be
2657 too great.
2658
265930. Fixed a bug in callout caching. If a RCPT command caused the sender address
2660 to be verified with callout=postmaster, and the main callout worked but the
2661 postmaster check failed, the verification correctly failed. However, if a
2662 subsequent RCPT command asked for sender verification *without* the
2663 postmaster check, incorrect caching caused this verification also to fail,
2664 incorrectly.
2665
266631. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2667 it was not caching the DNS options (qualify_single, search_parents) that
2668 were used when the lookup failed. A subsequent lookup with different
2669 options therefore always gave the same answer, though there were cases
2670 where it should not have. (Example: a "domains = !$mx_any" option on a
2671 dnslookup router: the "domains" option is always processed without any
2672 widening, but the router might have qualify_single set.) Now Exim uses the
2673 cached value only when the same options are set.
2674
267532. Added John Jetmore's "exipick" utility to the distribution.
2676
267733. GnuTLS: When an attempt to start a TLS session fails for any reason other
2678 than a timeout (e.g. a certificate is required, and is not provided), an
2679 Exim server now closes the connection immediately. Previously it waited for
2680 the client to close - but if the client is SSL, it seems that they each
2681 wait for each other, leading to a delay before one of them times out.
2682
268334: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2684 maintained 0.8.x compatibility because I don't think many are using it, and
2685 it is clearly obsolete.
2686
268735. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2688 transport.
2689
269036. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2691 client certificate was expired. A simple patch fixes this, though I don't
2692 understand the full logic of why the verify callback is called multiple
2693 times.
2694
269537. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2696 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2697 which causes problems with some clients (such as the Certicom SSL Plus
2698 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2699 disables the coutermeasure allowing Eudora to connect."
2700
270138. Exim was not checking that a write() to a log file succeeded. This could
2702 lead to Bad Things if a log got too big, in particular if it hit a file
2703 size limit. Exim now panics and dies if it cannot write to a log file, just
2704 as it does if it cannot open a log file.
2705
270639. Modified OS/Makefile-Linux so that it now contains
2707
2708 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2709
2710 The two -D definitions ensure that Exim is compiled with large file
2711 support, which makes it possible to handle log files that are bigger than
2712 2^31.
2713
271440. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2715 instance) a domain was checked against a named list that involved a lookup,
2716 causing $domain_data to be set, then another domain was checked against the
2717 same list, then the first domain was re-checked, the value of $domain_data
2718 after the final check could be wrong. In particular, if the second check
2719 failed, it could be set empty. This bug probably also applied to
2720 $localpart_data.
2721
272241. The strip_trailing_dot option was not being applied to the address given
2723 with the -f command-line option.
2724
272542. The code for reading a message's header from the spool was incrementing
2726 $received_count, but never initializing it. This meant that the value was
2727 incorrect (doubled) while delivering a message in the same process in which
2728 it was received. In the most common configuration of Exim, this never
2729 happens - a fresh exec is done - but it can happen when
2730 deliver_drop_privilege is set.
2731
273243. When Exim logs an SMTP synchronization error - client data sent too soon -
2733 it now includes up to 150 characters of the unexpected data in the log
2734 line.
2735
273644. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2737 and building data strings. The size of both of these buffers was 10 000
2738 bytes - far larger than anybody would *ever* want, thought I. Needless to
2739 say, somebody hit the limit. I have increased the maximum line length to
2740 20 000 and the maximum data length of concatenated lines to 100 000. I have
2741 also fixed two bugs, because there was no checking on these buffers. Tsk,
2742 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2743 buffer is too small.
2744
274545. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2746 lsearch lookups. Now it does.
2747
274846. When parsing a route_list item in a manualroute router, a fixed-length
2749 buffer was used for the list of hosts. I made this 1024 bytes long,
2750 thinking that nobody would ever have a list of hosts that long. Wrong.
2751 Somebody had a whole pile of complicated expansion conditions, and the
2752 string was silently truncated, leading to an expansion error. It turns out
2753 that it is easier to change to an unlimited length (owing to other changes
2754 that have happened since this code was originally written) than to build
2755 structure for giving a limitation error. The length of the item that
2756 expands into the list of hosts is now unlimited.
2757
275847. The lsearch lookup could not handle data where the length of text line was
2759 more than 4095 characters. Such lines were truncated, leading to shortened
2760 data being returned. It should now handle lines of any length.
2761
276248. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2763 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2764 ACL").
2765
276649. Cosmetic tidy to scripts like exicyclog that are generated by globally
2767 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2768 no longer happens in comment lines. A list of replacements is now placed
2769 at the head of all of the source files, except those whose only change is
2770 to replace PERL_COMMAND in the very first #! line.
2771
277250. Replaced the slow insertion sort in queue.c, for sorting the list of
2773 messages on the queue, with a bottom-up merge sort, using code contributed
2774 by Michael Haardt. This should make operations like -bp somewhat faster on
2775 large queues. It won't affect queue runners, except when queue_run_in_order
2776 is set.
2777
277851. Installed eximstats 1.31 in the distribution.
2779
278052. Added support for SRV lookups to the dnslookup router.
2781
278253. If an ACL referred to $message_body or $message_body_end, the value was not
2783 reset for any messages that followed in the same SMTP session.
2784
278554. The store-handling optimization for building very long strings was not
2786 differentiating between the different store pools. I don't think this
2787 actually made any difference in practice, but I've tidied it.
2788
278955. While running the routers to verify a sender address, $sender_address
2790 was still set to the sender address. This is wrong, because when routing to
2791 send a bounce to the sender, it would be empty. Therefore, I have changed
2792 it so that, while verifying a sender address, $sender_address is set to <>.
2793 (There is no change to what happens when verifying a recipient address.)
2794
279556. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2796 target A or AAAA records (if not already returned) without resetting the
2797 qualify_single or search_parents options of the DNS resolver. These are
2798 inappropriate in this case because the targets of MX and SRV records must
2799 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2800 target that, when qualified, matched something in the local domain. These
2801 two options are now turned off when doing these lookups.
2802
280357. It seems that at least some releases of Reiserfs (which does not have the
2804 concept of a fixed number of inodes) returns zero and not -1 for the
2805 number of available inodes. This interacted badly with check_spool_inodes,
2806 which assumed that -1 was the "no such thing" setting. What I have done is
2807 to check that the total number of inodes is greater than zero before doing
2808 the test of how many are available.
2809
281058. When a "warn" ACL statement has a log_message modifier, the message is
2811 remembered, and not repeated. This is to avoid a lot of repetition when a
2812 message has many recipients that cause the same warning to be written.
2813 Howewer, Exim was preserving the list of already written lines for an
2814 entire SMTP session, which doesn't seem right. The memory is now reset if a
2815 new message is started.
2816
281759. The "rewrite" debugging flag was not showing the result of rewriting in the
2818 debugging output unless log_rewrite was also set.
2819
282060. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2821 of (int)(handle) when we know that handle contains (void *)(-1).
2822
282361. The Exim daemon panic-logs an error return when it closes the incoming
2824 connection. However "connection reset by peer" seems to be common, and
2825 isn't really an error worthy of noting specially, so that particular error
2826 is no long logged.
2827
282862. When Exim is trying to find all the local interfaces, it used to panic and
2829 die if the ioctl to get the interface flags failed. However, it seems that
2830 on at least one OS (Solaris 9) it is possible to have an interface that is
2831 included in the list of interfaces, but for which you get a failure error
2832 for this call. This happens when the interface is not "plumbed" into a
2833 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2834 failure of the "get flags" call assumes that the interface is down.
2835
283663. Added a ${eval10: operator, which assumes all numbers are decimal. This
2837 makes life easier for people who are doing arithmetic on fields extracted
2838 from dates, where you often get leading zeros that should not be
2839 interpreted as octal.
2840
284164. Added qualify_domain to the redirect router, to override the global
2842 setting.
2843
284465. If a pathologically long header line contained very many addresses (the
2845 report of this problem mentioned 10 000) and each of them was rewritten,
2846 Exim could use up a very large amount of memory. (It kept on making new
2847 copies of the header line as it rewrote, and never released the old ones.)
2848 At the expense of a bit more processing, the header rewriting function has
2849 been changed so that it no longer eats memory in this way.
2850
285166. The generation of the Received: header has been moved from the time that a
2852 message starts to be received, to the time that it finishes. The timestamp
2853 in the Received: header should now be very close to that of the <= log
2854 line. There are two side-effects of this change:
2855
2856 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2857 logged header lines no longer include the local Received: line, because
2858 it has not yet been created. The same applies to a copy of the message
2859 that is returned to a non-SMTP sender when a message is rejected.
2860
2861 (b) When a filter file is tested using -bf, no additional Received: header
2862 is added to the test message. After some thought, I decided that this
2863 is a bug fix.
2864
2865 This change does not affect the value of $received_for. It is still set
2866 after address rewriting, but before local_scan() is called.
2867
286867. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2869
287068. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2871 gave an unhelpful panic error message, and a defer error. I have managed to
2872 change this behaviour so that it now rejects any supplied certificate,
2873 which seems right, as the list of acceptable certificates is empty.
2874
287569. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2876 gave an unhelpful defer error. I have not managed to make this reject any
2877 supplied certificates, but the error message it gives is "no certificate
2878 supplied", which is not helpful.
2879
288070. exigrep's output now also includes lines that are not associated with any
2881 message, but which match the given pattern. Implemented by a patch from
2882 Martin Sluka, which also tidied up the Perl a bit.
2883
288471. Recipient callout verification, like sender verification, was using <> in
2885 the MAIL FROM command. This isn't really the right thing, since the actual
2886 sender may affect whether the remote host accepts the recipient or not. I
2887 have changed it to use the actual sender in the callout; this means that
2888 the cache record is now keyed on a recipient/sender pair, not just the
2889 recipient address. There doesn't seem to be a real danger of callout loops,
2890 since a callout by the remote host to check the sender would use <>.
2891 [SEE ABOVE: changed after hitting problems.]
2892
289372. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2894 temporary errors. However, in the case of such a code being given after
2895 the end of a data transmission (i.e. after ".") Exim was failing to write
2896 a retry record for the message. (Yes, there was some broken host that was
2897 actually sending 8xx at this point.)
2898
289973. An unknown lookup type in a host list could cause Exim to panic-die when
2900 the list was checked. (An example that provoked this was putting <; in the
2901 middle of a list instead of at the start.) If this happened during a DATA
2902 ACL check, a -D file could be left lying around. This kind of configuration
2903 error no longer causes Exim to die; instead it causes a defer errror. The
2904 incident is still logged to the main and panic logs.
2905
290674. Buglet left over from Exim 3 conversion. The message "too many messages
2907 in one connection" was written to the rejectlog but not the mainlog, except
2908 when address rewriting (yes!) was being logged.
2909
291075. Added write_rejectlog option.
2911
291276. When a system filter was run not as root (that is, when system_filter_user
2913 was set), the values of the $n variables were not being returned to the
2914 main process; thus, they were not subsequently available in the $sn
2915 variables.
2916
291777. Added +return_path_on_delivery log selector.
2918
291978. A connection timeout was being treated differently from recipients deferred
2920 when testing hosts_max_try with a message that was older than the host's
2921 retry timeout. (The host should not be counted, thus allowing all hosts to
2922 be tried at least once before bouncing.) This may have been the cause of an
2923 occasionally reported bug whereby a message would remain on the queue
2924 longer than the retry timeout, but would be bounced if a delivery was
2925 forced. I say "may" because I never totally pinned down the problem;
2926 setting up timeout/retry tests is difficult. See also the next item.
2927
292879. The ultimate address timeout was not being applied to errors that involved
2929 a combination of host plus message (for example, a timeout on a MAIL
2930 command). When an address resolved to a number of possible hosts, and they
2931 were not all tried for each delivery (e.g. because of hosts_max_try), a
2932 message could remain on the queue longer than the retry timeout.
2933
293480. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2935 Haardt.
2936
293781. Fixed an obscure SMTP outgoing bug which required at least the following
2938 conditions: (a) there was another message waiting for the same server;
2939 (b) the server returned 5xx to all RCPT commands in the first message so
2940 that the message was not completed; (c) the server dropped the connection
2941 or gave a negative response to the RSET that Exim sends to abort the
2942 transaction. The observed case was a dropped connection after DATA that had
2943 been sent in pipelining mode. That is, the server had advertised PIPELINING
2944 but was not implementing it correctly. The effect of the bug was incorrect
2945 behaviour, such as trying another host, and this could lead to a crash.
2946
2947
2948Exim version 4.30
2949-----------------
2950
2951 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2952 and daemon.c were passed as pointers to ints; they should have been
2953 pointers to socklen_t variables (which are typically unsigned ints).
2954
2955 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2956 fixed.
2957
2958 3. Fixed a really odd bug that affected only the testing scheme; patching a
2959 certain fixed string in the binary changed the value of another string that
2960 happened to be identical to the end of the original first string.
2961
2962 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2963 name", it returns that address as the IP address. On some operating
2964 systems (e.g. Solaris), it also passes back the IP address string as the
2965 "host name". However, on others (e.g. Linux), it passes back an empty
2966 string. Exim wasn't checking for this, and was changing the host name to an
2967 empty string, assuming it had been canonicized.
2968
2969 5. Although rare, it is permitted to have more than one PTR record for a given
2970 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2971 all the names associated with an address, because they do in Solaris.
2972 However, it seems that they do not in Linux for data that comes from the
2973 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2974 I found this out when I moved to a new Linux workstation and tried to run
2975 the Exim test suite.
2976
2977 To get round this problem I have changed the code so that it now does its
2978 own call to the DNS to look up PTR records when searching for a host name.
2979 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2980 addresses that are only in /etc/hosts are still found.
2981
2982 This behaviour is, however, controlled by an option called host_lookup_
2983 order, which defaults to "bydns:byaddr". If people want to use the other
2984 order, or indeed, just use one or the other means of lookup, they can
2985 specify it in this variable.
2986
2987 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2988 some operating systems, this comes back from gethostbyaddr() as an empty
2989 string, and this is what Exim used to test for. However, it seems that in
2990 other systems, "." is yielded. Exim now tests for this case too.
2991
2992 7. The values of check_spool_space and check_log_space are now held internally
2993 as a number of kilobytes instead of an absolute number of bytes. If a
2994 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2995 kilobyte. This means that much larger values can be stored.
2996
2997 8. Exim monitor: an attempt to get the action menu when not actually pointing
2998 at a message produces an empty menu entitled "No message selected". This
2999 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3000 no entries in it ("Shell widget menu has zero width and/or height"). So I
3001 have added a single, blank menu entry in this case.
3002
3003 9. Added ${quote_local_part.
3004
300510. MIME decoding is now applied to the contents of Subject: header lines when
3006 they are logged.
3007
300811. Now that a reference to $sender_host_address automatically causes a reverse
3009 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3010 host lookup before query-style lookups in lists that might use this
3011 variable. This has therefore been abolished, and the "net-" prefix is no
3012 longer necessary for query-style lookups.
3013
301412. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3015 have been a typo for LFLAGS, so it has been changed.
3016
301713. The install script calls Exim with "-C /dev/null" in order to find the
3018 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3019 to be output. Howeve, since Exim outputs its version number before the
3020 error, it didn't break the script. It just looked ugly. I fixed this by
3021 always allowing "-C /dev/null" if the caller is root.
3022
302314. Ignore overlarge ACL variable number when reading spool file - insurance
3024 against a later release with more variables having written the file.
3025
302615. The standard form for an IPv6 address literal was being rejected by EHLO.
3027 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3028 this, as well as the form without the "IPv6" on the front.
3029
303016. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3031 OS/Makefile-Darwin file.
3032
303317. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3034 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3035
303618. After change 4.21/52, "%ld" was used to format the contents of the $inode
3037 variable. However, some OS use ints for inodes. I've added cast to long int
3038 to get rid of the compiler warning.
3039
304019. I had forgotten to lock out "/../" in configuration file names when
3041 ALT_CONFIG_PREFIX was set.
3042
304320. Routers used for verification do not need to specify transports. However,
3044 if such a router generated a host list, and callout was configured, Exim
3045 crashed, because it could not find a port number from the (non-existent)
3046 transport. It now assumes port 25 in this circumstance.
3047
304821. Added the -t option to exigrep.
3049
305022. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3051 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3052 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3053 them is set, LOOKUP_LSEARCH is forced.
3054
305523. "exim -bV" now outputs a list of lookups that are included in the binary.
3056
305724. Added sender and host information to the "rejected by local_scan()" log
3058 line; previously there was no indication of these.
3059
306025. Added .include_if_exists.
3061
306226. Change 3.952/11 added an explicit directory sync on top of a file sync for
3063 Linux. It turns out that not all file systems support this. Apparently some
3064 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3065 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3066 not supported on the file descriptor, is now ignored when Exim is trying to
3067 sync a directory. This applies only to Linux.
3068
306927. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3070
307128. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3072 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3073 this.
3074
307529. Added support for maildirsize files from supplied patch (modified a bit).
3076
307730. The use of :fail: followed by an empty string could lead Exim to respond to
3078 sender verification failures with (e.g.):
3079
3080 550 Verification failed for <xxx>
3081 550 Sender verify failed
3082
3083 where the first response line was missing the '-' that indicates it is not
3084 the final line of the response.
3085
308631. The loop for finding the name of the user that called Exim had a hardwired
3087 limit of 10; it now uses the value of finduser_retries, which is used for
3088 all other user lookups.
3089
309032. Added $received_count variable, available in data and not_smtp ACLs, and at
3091 delivery time.
3092
309333. Exim was neglecting to zero errno before one call of strtol() when
3094 expanding a string and expecting an integer value. On some systems this
3095 resulted in spurious "integer overflow" errors. Also, it was casting the
3096 result into an int without checking.
3097
309834. Testing for a connection timeout using "timeout_connect" in the retry rules
3099 did not work. The code looks as if it has *never* worked, though it appears
3100 to have been documented since at least releast 1.62. I have made it work.
3101
310235. The "timeout_DNS" error in retry rules, also documented since at least
3103 1.62, also never worked. As it isn't clear exactly what this means, and
3104 clearly it isn't a major issue, I have abolished the feature by treating it
3105 as "timeout", and writing a warning to the main and panic logs.
3106
310736. The display of retry rules for -brt wasn't always showing the error code
3108 correctly.
3109
311037. Added new error conditions to retry rules: timeout_A, timeout_MX,
3111 timeout_connect_A, timeout_connect_MX.
3112
311338. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3114 to the empty sender.
3115
311639. The daemon was not analysing the content of -oX till after it had closed
3117 stderr and disconnected from the controlling terminal. This meant that any
3118 syntax errors were only noted on the panic log, and the return code from
3119 the command was 0. By re-arranging the code a little, I've made the
3120 decoding happen first, so such errors now appear on stderr, and the return
3121 code is 1. However, the actual setting up of the sockets still happens in
3122 the disconnected process, so errors there are still only recorded on the
3123 panic log.
3124
312540. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3126 connections (as happens on some IP stacks) was logged at start up time as
3127 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3128 it from "IPv6 and IPv4", which means that two separate sockets are being
3129 used.
3130
313141. The debug output for gethostbyname2() or getipnodebyname() failures now
3132 says whether AF_INET or AF_INET6 was passed as an argument.
3133
313442. Exiwhat output was messed up when time zones were included in log
3135 timestamps.
3136
313743. Exiwhat now gives more information about the daemon's listening ports,
3138 and whether -tls-on-connect was used.
3139
314044. The "port" option of the smtp transport is now expanded.
3141
314245. A "message" modifier in a "warn" statement in a non-message ACL was being
3143 silently ignored. Now an error message is written to the main and panic
3144 logs.
3145
314646. There's a new ACL modifier called "logwrite" which writes to a log file
3147 as soon as it is encountered.
3148
314947. Added $local_user_uid and $local_user_gid at routing time.
3150
315148. Exim crashed when trying to verify a sender address that was being
3152 rewritten to "<>".
3153
315449. Exim was recognizing only a space character after ".include". It now also
3155 recognizes a tab character.
3156
315750. Fixed several bugs in the Perl script that creates the exim.8 man page by
3158 extracting the relevant information from the specification. The man page no
3159 longer contains scrambled data for the -d option, and I've added a section
3160 at the front about calling Exim under different names.
3161
316251. Added "extra_headers" argument to the "mail" command in filter files.
3163
316452. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3165 crash.
3166
316753. Installed eximstats 1.29.
3168
316954. Added transport_filter_timeout as a generic transport option.
3170
317155. Exim no longer adds an empty Bcc: header to messages that have no To: or
3172 Cc: header lines. This was required by RFC 822, but it not required by RFC
3173 2822.
3174
317556. Exim used to add From:, Date:, and Message-Id: header lines to any
3176 incoming messages that did not have them. Now it does so only if the
3177 message originates locally, that is, if there is no associated remote host
3178 address. When Resent- header lines are present, this applies to the Resent-
3179 lines rather than the non-Resent- lines.
3180
318157. Drop incoming SMTP connection after too many syntax or protocol errors. The
3182 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3183
318458. Messages for configuration errors now include the name of the main
3185 configuration file - useful now that there may be more than one file in a
3186 list (.included file names were always shown).
3187
318859. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3189 for those rare installations that do not start the daemon as root or run it
3190 setuid root. I've cut out the call to initgroups() if the daemon is not
3191 root at that time.
3192
319360. The Exim user and group can now be bound into the binary as text strings
3194 that are looked up at the start of Exim's processing.
3195
319661. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3197
319862. Added $mailstore_basename variable.
3199
320063. Installed patch to sieve.c from Michael Haardt.
3201
320264. When Exim failed to open the panic log after failing to open the main log,
3203 the original message it was trying to log was written to stderr and debug
3204 output, but if they were not available (the usual case in production), it
3205 was lost. Now it is written to syslog before the two lines that record the
3206 failures to open the logs.
3207
320865. Users' Exim filters run in subprocesses under the user's uid. It is
3209 possible for a "deliver" command or an alias in a "personal" command to
3210 provoke an address rewrite. If logging of address rewriting is configured,
3211 this fails because the process is not running as root or exim. There may be
3212 a better way of dealing with this, but for the moment (because 4.30 needs
3213 to be released), I have disabled address rewrite logging when running a
3214 filter in a non-root, non-exim process.
3215
3216
3217Exim version 4.24
3218-----------------
3219
3220 1. The buildconfig auxiliary program wasn't quoting the value set for
3221 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3222 not defined. This bug was masked in 4.22 by the effect that was fixed in
3223 change 4.23/1.
3224
3225 2. Some messages that were rejected after a message id was allocated were
3226 shown as "incomplete" by exigrep. It no longer does this for messages that
3227 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3228
3229 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3230 have allow_domain_literals set, the ID did not get logged in the <= line.
3231 Domain literals are now always recognized in Message-ID: header lines.
3232
3233 4. The first argument for a ${extract expansion item is the key name or field
3234 number. Leading and trailing spaces in this item were not being ignored,
3235 causing some misleading effects.
3236
3237 5. When deliver_drop_privilege was set, single queue runner processes started
3238 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3239 same command in the process it spins off) were not dropping privilege.
3240
3241 6. When the daemon running as "exim" started a queue runner, it always
3242 re-executed Exim in the spun-off process. This is a waste of effort when
3243 deliver_drop_privilege is set. The new process now just calls the
3244 queue-runner function directly.
3245
3246
3247Exim version 4.23
3248-----------------
3249
3250 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3251 HEADERS_CHARSET.
3252
3253 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3254 ignored. Though the use of -oP was forcing the writing of a pid file, it
3255 was always written to the default place.
3256
3257 3. If the message "no IP address found for host xxxx" is generated during
3258 incoming verification, it is now followed by identification of the incoming
3259 connection (so you can more easily find what provoked it).
3260
3261 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3262
3263 5. Added some features to "harden" Exim a bit more against certain attacks:
3264
3265 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3266 be put in Local/Makefile. This is like the never_users runtime option,
3267 but it cannot be overridden. The default setting is "root".
3268
3269 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3270 prefix string with which any file named in a -C command line option
3271 must start.
3272
3273 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3274 is retained for -C and -D only if the caller of Exim is root. Without
3275 it, the exim user may also use -C and -D and retain privilege.
3276
3277 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3278 command line option is disabled.
3279
3280 6. Macro names set by the -D option must start with an upper case letter, just
3281 like macro names defined in the configuration file.
3282
3283 7. Added "dereference=" facility to LDAP.
3284
3285 8. Two instances of the typo "uknown" in the source files are fixed.
3286
3287 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3288 the Configure-Makefile script screwed up while processing it.
3289
329010. Incorporated PCRE 4.4.
3291
329211. The SMTP synchronization check was not operating right at the start of an
3293 SMTP session. For example, it could not catch a HELO sent before the client
3294 waited for the greeting. There is now a check for outstanding input at the
3295 point when the greeting is written. Because of the duplex, asynchronous
3296 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3297 way, but not yet received, when the check is performed.
3298
329912. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3300 on TCP/IP sockets, because this apparently causes some broken clients to
3301 timeout.
3302
330313. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3304 unchanged) from the Cygwin maintainer.
3305
330614. The code for -bV that shows what is in the binary showed "mbx" when maildir
3307 was supported instead of testing for mbx. Effectively a typo.
3308
330915. The spa authenticator server code was not checking that the input it
3310 received was valid base64.
3311
331216. The debug output line for the "set" modifier in ACLs was not showing the
3313 name of the variable that was being set.
3314
331517. Code tidy: the variable type "vtype_string" was never used. Removed it.
3316
331718. Previously, a reference to $sender_host_name did not cause a DNS reverse
3318 lookup on its own. Something else was needed to trigger the lookup. For
3319 example, a match in host_lookup or the need for a host name in a host list.
3320 Now, if $sender_host_name is referenced and the host name has not yet been
3321 looked up, a lookup is performed. If the lookup fails, the variable remains
3322 empty, and $host_lookup_failed is set to "1".
3323
332419. Added "eqi" as a case-independent comparison operator.
3325
332620. The saslauthd authentication condition could segfault if neither service
3327 nor realm was specified.
3328
332921. If an overflowing value such as "2048M" was set for message_size_limit, the
3330 error message that was logged was misleading, and incoming SMTP
3331 connections were dropped. The message is now more accurate, and temporary
3332 errors are given to SMTP connections.
3333
333422. In some error situations (such as 21 above) Exim rejects all SMTP commands
3335 (except RSET) with a 421 error, until QUIT is received. However, it was
3336 failing to send a response to QUIT.
3337
333823. The HELO ACL was being run before the code for helo_try_verify_hosts,
3339 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3340 ACL is now run after the helo_try_verify_hosts code.
3341
334224. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3343 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3344 case-independent, so other case variants are also recognized). Apparently
3345 some systems use these upper case variants.
3346
334725. If more than two messages were waiting for the same host, and a transport
3348 filter was specified for the transport, Exim sent two messages over the
3349 same TCP/IP connection, and then failed with "socket operation on non-
3350 socket" when it tried to send the third.
3351
335226. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3353
335427. The extern definition of crypt16() in expand.c was not being excluded when
3355 the OS had its own crypt16() function.
3356
335728. Added bounce_return_body as a new option, and bounce_return_size_limit
3358 as a preferred synonym for return_size_limit, both as an option and as an
3359 expansion variable.
3360
336129. Added LIBS=-liconv to OS/Makefile-OSF1.
3362
336330. Changed the default configuration ACL to relax the local part checking rule
3364 for addresses that are not in any local domains. For these addresses,
3365 slashes and pipe symbols are allowed within local parts, but the sequence
3366 /../ is explicitly forbidden.
3367
336831. SPA server authentication was not clearing the challenge buffer before
3369 using it.
3370
337132. log_message in a "warn" ACL statement was writing to the reject log as
3372 well as to the main log, which contradicts the documentation and doesn't
3373 seem right (because no rejection is happening). So I have stopped it.
3374
337533. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3376 However, I am unable to do any testing of this.
3377
337834. Fixed an infelicity in the appendfile transport. When checking directories
3379 for a mailbox, to see if any needed to be created, it was accidentally
3380 using path names with one or more superfluous leading slashes; tracing
3381 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3382
338335. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3384 contents are added to the log line that is written for every discarded
3385 recipient. (Previously a log_message setting was ignored.)
3386
338736. The ${quote: operator now quotes the string if it is empty.
3388
338937. The install script runs exim in order to find its version number. If for
3390 some reason other than non-existence or emptiness, which it checks, it
3391 could not run './exim', it was installing it with an empty version number,
3392 i.e. as "exim-". This error state is now caught, and the installation is
3393 aborted.
3394
339538. An argument was missing from the function that creates an error message
3396 when Exim fails to connect to the socket for saslauthd authentication.
3397 This could cause Exim to crash, or give a corrupted message.
3398
339939. Added isip, isip4, and isip6 to ${if conditions.
3400
340140. The ACL variables $acl_xx are now saved with the message, and can be
3402 accessed later in routers, transports, and filters.
3403
340441. The new lookup type nwildlsearch is like wildlsearch, except that the key
3405 strings in the file are not string-expanded.
3406
340742. If a MAIL command specified a SIZE value that was too large to fit into an
3408 int variable, the check against message_size_limit failed. Such values are
3409 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3410 day this will have to be increased, but I don't think I want to be around
3411 when emails are that large.
3412
3413
3414
3415Exim version 4.22
3416-----------------
3417
3418 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3419 iconv() is not standard in FreeBSD.
3420
3421 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3422 IPv6 enabled. The observed symptom was a segmentation fault on return from
3423 the function os_common_find_running_interfaces() in src/os.c.
3424
3425 3. In the check_special_case() function in daemon.c I had used "errno" as an
3426 argument name, which causes warnings on some systems. This was basically a
3427 typo, since it was named "eno" in the comments!
3428
3429 4. The code that waits for the clock to tick (at a resolution of some fraction
3430 of a second) so as to ensure message-id uniqueness was always waiting for
3431 at least one whole tick, when it could have waited for less. [This is
3432 almost certainly not relevant at current processor speeds, where it is
3433 unlikely to ever wait at all. But we try to future-proof.]
3434
3435 5. The function that sleeps for a time interval that includes fractions of a
3436 second contained a race. It did not block SIGALRM between setting the
3437 timer, and suspending (a couple of lines later). If the interval was short
3438 and the sigsuspend() was delayed until after it had expired, the suspension
3439 never ended. On busy systems this could lead to processes getting stuck for
3440 ever.
3441
3442 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3443 process, before it forks any delivery processes. The open lookup caching
3444 mechanism meant that the open file or database connection was passed into
3445 the delivery process. The problem was that delivery processes always tidy
3446 up cached lookup data. This could cause a problem for the next delivery
3447 process started by the queue runner, because the external queue runner
3448 process does not know about the closure. So the next delivery process
3449 still has data in the lookup cache. In the case of a file lookup, there was
3450 no problem because closing a file descriptor in a subprocess doesn't affect
3451 the parent. However, if the lookup was caching a connection to a database,
3452 the connection was closed, and the second delivery process was likely to
3453 see errors such as "PGSQL: query failed: server closed the connection
3454 unexpectedly". The problem has been fixed by closing all cached lookups
3455 in a queue runner before running a delivery process.
3456
3457 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3458 seem to have the "const" qualifier which it has on other OS. I've
3459 parameterised it.
3460
3461 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3462 *of the same type* (client or server) with the same public name that an
3463 error should be diagnosed.
3464
3465 9. When Exim looked up a host name for an IP address, but failed to find the
3466 original IP address when looking up the host name (a safety check), it
3467 output the message "<ip address> does not match any IP for NULL", which was
3468 confusing, to say the least. The bug was that the host name should have
3469 appeared instead of "NULL".
3470
347110. Since release 3.03, if Exim is called by a uid other than root or the Exim
3472 user that is built into the binary, and the -C or -D options is used, root
3473 privilege is dropped before the configuration file is read. In addition,
3474 logging is switched to stderr instead of the normal log files. If the
3475 configuration then re-defines the Exim user, the unprivileged environment
3476 is probably not what is expected, so Exim logs a panic warning message (but
3477 proceeds).
3478
3479 However, if deliver_drop_privilege is set, the unprivileged state may well
3480 be exactly what is intended, so the warning has been cut out in that case,
3481 and Exim is allowed to try to write to its normal log files.
3482
3483
3484Exim version 4.21
3485-----------------
3486
3487 1. smtp_return_error_details was not giving details for temporary sender
3488 or receiver verification errors.
3489
3490 2. Diagnose a configuration error if two authenticators have the same public
3491 name.
3492
3493 3. Exim used not to create the message log file for a message until the first
3494 delivery attempt. This could be confusing when incoming messages were held
3495 for policy or load reasons. The message log file is now created at the time
3496 the message is received, and an initial "Received" line is written to it.
3497
3498 4. The automatically generated man page for command line options had a minor
3499 bug that caused no ill effects; however, a more serious problem was that
3500 the procedure for building the man page automatically didn't always
3501 operate. Consequently, release 4.20 contains an out-of-date version. This
3502 shouldn't happen again.
3503
3504 5. When building Exim with embedded Perl support, the script that builds the
3505 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3506 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3507
3508 6. The freeze_tell option was not being used for messages that were frozen on
3509 arrival, either by an ACL or by local_scan().
3510
3511 7. Added the smtp_incomplete_transaction log selector.
3512
3513 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3514 was accepting AUTH without a new EHLO.
3515
3516 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3517 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3518 RFC.
3519
352010. Logging of TCP/IP connections (when configured) now happens in the main
3521 daemon process instead of the child process, so that the TCP/IP connection
3522 count is more accurate (but it can never be perfect).
3523
352411. The use of "drop" in a nested ACL was not being handled correctly in the
3525 outer ACL. Now, if condition failure induced by the nested "drop" causes
3526 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3527 or "require"), the connection is dropped.
3528
352912. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3530 that yield "discard" can now be used with an "accept" or a "discard" verb,
3531 but an error is generated for any others (because I can't see a useful way
3532 to define what should happen).
3533
353413. When an ACL is read dynamically from a file (or anywhere else), the lines
3535 are now processed in the same way as lines in the Exim configuration file.
3536 In particular, continuation lines are supported.
3537
353814. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3539
354015. Added -ti meaning -t -i.
3541
354216. Check for letters, digits, hyphens, and dots in the names of dnslist
3543 domains, and warn by logging if others are found.
3544
354517. At least on BSD, alignment is not guarenteed for the array of ifreq's
3546 returned from GIFCONF when Exim is trying to find the list of interfaces on
3547 a host. The code in os.c has been modified to copy each ifreq to an aligned
3548 structure in all cases.
3549
3550 Also, in some cases, the returned ifreq's were being copied to a 'struct
3551 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3552 means the last couple of bytes of an IPv6 address could be chopped if the
3553 ifreq contained only a normal sockaddr (14 bytes storage).
3554
355518. Named domain lists were not supported in the hosts_treat_as_local option.
3556 An entry such as +xxxx was not recognized, and was treated as a literal
3557 domain name.
3558
355919. Ensure that header lines added by a DATA ACL are included in the reject log
3560 if the ACL subsequently rejects the message.
3561
356220. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3563 MD5 (which is deprecated).
3564
356521. When testing a filter file using -bf, Exim was writing a message when it
3566 took the sender from a "From " line in the message, but it was not doing so
3567 when it took $return_path from a Return-Path: header line. It now does.
3568
356922. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3570 with a valid header line field name (a series of printing characters
3571 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3572
357323. Changed "disc" in the source to "disk" to conform to the documentation and
3574 the book and for uniformity.
3575
357624. Ignore Sendmail's -Ooption=value command line item.
3577
357825. When execve() failed while trying to run a command in a pipe transport,
3579 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3580 could be confused with a return value of 69 from the command itself. This
3581 has been changed to 127, the value the shell returns if it is asked to run
3582 a non-existent command. The wording for the related log line suggests a
3583 non-existent command as the problem.
3584
358526. If received_header_text expands to an empty string, do not add a Received:
3586 header line to the message. (Well, it adds a token one on the spool, but
3587 marks it "old" so that it doesn't get used or transmitted.)
3588
358927. Installed eximstats 1.28 (addition of -nt option).
3590
359128. There was no check for failure on the call to getsockname() in the daemon
3592 code. This can fail if there is a shortage of resources on the system, with
3593 ENOMEM, for example. A temporary error is now given on failure.
3594
359529. Contrary to the C standard, it seems that in some environments, the
3596 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3597 program. Exim now does this explicitly; it affects the formatting of
3598 timestamps using strftime().
3599
360030. If exiqsumm was given junk data, it threw up some uninitialized variable
3601 complaints. I've now initialized all the variables, to avoid this.
3602
360332. Header lines added by a system filter were not being "seen" during
3604 transport-time rewrites.
3605
360633. The info_callback() function passed to OpenSSL is set up with type void
3607 (*)(SSL *, int, int), as described somewhere. However, when calling the
3608 function (actually a macro) that sets it up, the type void(*)() is
3609 expected. I've put in a cast to prevent warnings from picky compilers.
3610
361134. If a DNS black list lookup found a CNAME record, but there were no A
3612 records associated with the domain it pointed at, Exim crashed.
3613
361435. If a DNS black list lookup returned more than one A record, Exim ignored
3615 all but the first. It now scans all returned addresses if a particular IP
3616 value is being sought. In this situation, the contents of the
3617 $dnslist_value variable are a list of all the addresses, separated by a
3618 comma and a space.
3619
362036. Tightened up the rules for host name lookups using reverse DNS. Exim used
3621 to accept a host name and all its aliases if the forward lookup for any of
3622 them yielded the IP address of the incoming connection. Now it accepts only
3623 those names whose forward lookup yields the correct IP address. Any other
3624 names are discarded. This closes a loophole whereby a rogue DNS
3625 administrator could create reverse DNS records to break through a
3626 wildcarded host restriction in an ACL.
3627
362837. If a user filter or a system filter that ran in a subprocess used any of
3629 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3630 the wrong values were passed to the pipe command ($thisaddress had the
3631 value of $0, $0 had the value of $1, etc). This bug was introduced by
3632 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3633
363438. Improved the line breaking for long SMTP error messages from ACLs.
3635 Previously, if there was no break point between 40 and 75 characters, Exim
3636 left the rest of the message alone. Two changes have been made: (a) I've
3637 reduced the minimum length to 35 characters; (b) if it can't find a break
3638 point between 35 and 75 characters, it looks ahead and uses the first one
3639 that it finds. This may give the occasional overlong line, but at least the
3640 remaining text gets split now.
3641
364239. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3643 file descriptors might be low, and that setting 1000 would always raise it.
3644 It turns out that in some environments, the limit is already over 1000 and
3645 that lowering it causes trouble. So now Exim takes care not to decrease it.
3646
364740. When delivering a message, the value of $return_path is set to $sender_
3648 address at the start of routing (routers may change the value). By an
3649 oversight, this default was not being set up when an address was tested by
3650 -bt or -bv, which affected the outcome if any router or filter referred to
3651 $return_path.
3652
365341. The idea of the "warn" ACL verb is that it adds a header or writes to the
3654 log only when "message" or "log_message" are set. However, if one of the
3655 conditions was an address verification, or a call to a nested ACL, the
3656 messages generated by the underlying test were being passed through. This
3657 no longer happens. The underlying message is available in $acl_verify_
3658 message for both "message" and "log_message" expansions, so it can be
3659 passed through if needed.
3660
366142. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3662 new expansion $bh_ to give the encoded byte string without charset
3663 translation. Translation happens only if iconv() is available; HAVE_ICONV
3664 indicates this at build time. HEADERS_CHARSET gives the charset to
3665 translate to; headers_charset can change it in the configuration, and
3666 "headers charset" can change it in an individual filter file.
3667
366843. Now that we have a default RFC 2047 charset (see above), the code in Exim