Add -lutil to the default FreeBSD LIBS setting.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
e173618b 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.342 2006/04/19 11:15:43 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
c887c79e
TF
6Exim version 4.62
7-----------------
8
9TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
10 other effects) broke the use of negated acl sub-conditions.
11
1cce3af8
PH
12PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
13 patch).
14
afb3eaaf
PH
15PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
16 "Deny" causes Exim to reject the incoming connection with a 554 error.
17 Unfortunately, if there is a major crisis, such as a disk failure,
18 tcp-wrappers gives "deny", whereas what one would like would be some
19 kind of temporary error. A kludge has been added to help with this.
20 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
21 554 error is used if errno is still zero or contains ENOENT (which occurs
22 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
23 451 error is used.
24
e173618b
PH
25PH/03 Add -lutil to the default FreeBSD LIBS setting.
26
1cce3af8 27
214e2000
PH
28Exim version 4.61
29-----------------
30
31PH/01 The code for finding all the local interface addresses on a FreeBSD
32 system running IPv6 was broken. This may well have applied to all BSD
33 systems, as well as to others that have similar system calls. The broken
34 code found IPv4 interfaces correctly, but gave incorrect values for the
35 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
36 that it would not match correctly against @[] and not recognize the IPv6
37 addresses as local.
38
f9daeae0
PH
39PH/02 The ipliteral router was not recognizing addresses of the form user@
40 [ipv6:....] because it didn't know about the "ipv6:" prefix.
41
7e66e54d
PH
42PH/03 Added disable_ipv6.
43
c8ea1597
PH
44PH/04 Changed $reply_address to use the raw form of the headers instead of the
45 decoded form, because it is most often used to construct To: headers
46 lines in autoreplies, and the decoded form may well be syntactically
47 invalid. However, $reply_address has leading white space removed, and all
48 newlines turned into spaces so that the autoreply transport does not
49 grumble.
50
911f6fde
PH
51PH/05 If group was specified without a user on a router, and no group or user
52 was specified on a transport, the group from the router was ignored.
53
47ca6d6c
PH
54PH/06 Increased the number of ACL variables to 20 of each type, and arranged
55 for visible compile-time settings that can be used to change these
56 numbers, for those that want even more. Backwards compatibility with old
57 spool files has been maintained. However, going back to a previous Exim
58 release will lost any variables that are in spool files.
59
ed0e9820
PH
60PH/07 Two small changes when running in the test harness: increase delay when
61 passing a TCP/IP connection to a new process, in case the original
62 process has to generate a bounce, and remove special handling of
63 127.0.0.2 (sic), which is no longer necessary.
64
eff37e47
PH
65PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
66 be the same on different OS.
67
1921d2ea
PH
68PH/09 Moved a debug statement in filter processing to avoid a race problem when
69 testing.
70
b3f69ca8
JJ
71JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
72 whether --show-vars was specified or not
73
74JJ/02 exipick: Added support for new ACL variable spool format introduced
75 in 4.61-PH/06
76
424a1c63
PH
77PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
78 syntactically invalid From: or Reply-to: line, and a filter used this to
79 generate an autoreply, and therefore failed to obtain an address for the
80 autoreply, Exim could try to deliver to a non-existent relative file
81 name, causing unrelated and misleading errors. What now happens is that
82 it logs this as a hard delivery error, but does not attempt to create a
83 bounce message.
84
7a100415
PH
85PH/11 The exinext utility has a -C option for testing purposes, but although
86 the given file was scanned by exinext itself; it wasn't being passed on
87 when Exim was called.
88
19b9dc85
PH
89PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
90 an end-of-file indication when reading a command response.
91
309bd837
PH
92PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
93 compiled. In many other places in Exim, IPv6 addresses are always
94 recognized, so I have changed this. It also means that IPv4 domain
95 literals of the form [IPV4:n.n.n.n] are now always recognized.
96
59e82a2a
PH
97PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
98 used if the router is not running as root, for example, when verifying at
99 ACL time, or when using -bh. The debugging output from this situation was
100 non-existent - all you got was a failure to exec. I have made two
101 changes:
102
103 (a) Failures to set uid/gid, the current directory, or a process leader
104 in a subprocess such as that created by queryprogram now generate
105 suitable debugging ouput when -d is set.
106
107 (b) The queryprogram router detects when it is not running as root,
108 outputs suitable debugging information if -d is set, and then runs
109 the subprocess without attempting to change uid/gid.
110
9edc04ce
PH
111PH/15 Minor change to Makefile for building test_host (undocumented testing
112 feature).
113
1349e1e5
PH
114PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
115 additional section of a DNS packet that returns MX or SRV records.
116 Instead, it always explicitly searches for A/AAAA records. This avoids
117 major problems that occur when a DNS server includes only records of one
118 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
119 fixed another bug: if SRV records were looked up and the corresponding
120 address records were *not* found in the additional section, the port
121 values from the SRV records were lost.
122
ea49d0e1
PH
123PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
124 using the correct key (the original address) when searching the retry
125 rules in order to find which one to use for generating the retry hint.
126
064a94c9
PH
127PH/18 If quota_warn_message contains a From: header, Exim now refrains from
128 adding the default one. Similarly, if it contains a Reply-To: header, the
129 errors_reply_to option, if set, is not used.
130
727071f8
PH
131PH/19 When calculating a retry time, Exim used to measure the "time since
132 failure" by looking at the "first failed" field in the retry record. Now
133 it does not use this if it is later than than the arrival time of the
134 message. Instead it uses the arrival time. This makes for better
135 behaviour in cases where some deliveries succeed, thus re-setting the
136 "first failed" field. An example is a quota failure for a huge message
137 when small messages continue to be delivered. Without this change, the
138 "time since failure" will always be short, possible causing more frequent
139 delivery attempts for the huge message than are intended.
140
f78eb7c6
PH
141PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
142 $1, $2, $3) because the numerical variables can be reset during some
143 expansion items (e.g. "match"), thereby losing the authentication data.
144
21c28500
PH
145PH/21 Make -bV show the size of off_t variables so that the test suite can
146 decide whether to run tests for quotas > 2G.
147
148PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
149 mailbox_size, and mailbox_filecount in the appendfile transport. If a
150 filecount value is greater than 2G or if a quota value is greater than 2G
151 on a system where the size of off_t is not greater than 4, a panic error
152 is given.
153
1688f43b
PH
154PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
155 never match. The debug and -bh output now contains an explicit error
156 message indicating a malformed IPv4 address or mask.
157
158PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
159 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
160 PH/23 above applies.
161
9675b384
PH
162PH/25 Do not write to syslog when running in the test harness. The only
163 occasion when this arises is a failure to open the main or panic logs
164 (for which there is an explicit test).
165
6a3f1455
PH
166PH/26 Added the /no_tell option to "control=freeze".
167
dac79d3e
PH
168PH/27 If a host name lookup failed very early in a connection, for example, if
169 the IP address matched host_lookup and the reverse lookup yielded a name
170 that did not have a forward lookup, an error message of the form "no IP
171 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
172 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 173
5977a0b3
PH
174PH/28 An enabling patch from MH: add new function child_open_exim2() which
175 allows the sender and the authenticated sender to be set when
176 submitting a message from within Exim. Since child_open_exim() is
177 documented for local_scan(), the new function should be too.
178
c91535f3
PH
179PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
180 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
181 results in an empty string is now treated as unset.
182
0d46a8c8
PH
183PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
184
278c6e6c
PH
185PH/31 Added sender_verify_fail logging option.
186
2cbb4081
PH
187PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
188 needed by RFC 822 but not by RFC 2822 was commented out. I have now
189 tidied the source and removed it altogether.
190
3eef829e
PH
191PH/33 When a queue run was abandoned because the load average was too high, a
192 log line was always written; now it is written only if the queue_run log
193 selector is set. In addition, the log line for abandonment now contains
194 information about the queue run such as the pid. This is always present
195 in "start" and "stop" lines but was omitted from the "abandon" line.
196
1ab95fa6
PH
197PH/34 Omit spaces between a header name and the colon in the error message that
198 is given when verify = headers_syntax fails (if there are lots of them,
199 the message gets confusing).
200
230205fc
PH
201PH/35 Change the default for dns_check_names_pattern to allow slashes within
202 names, as there are now some PTR records that contain slashes. This check
203 is only to protect against broken name servers that fall over on strange
204 characters, so the fact that it applies to all lookups doesn't matter.
205
75e0e026
PH
206PH/36 Now that the new test suite is complete, we can remove some of the
207 special code in Exim that was needed for the old test suite. For example,
208 sorting DNS records because real resolvers return them in an arbitrary
209 order. The new test suite's fake resolver always returns records in the
210 same order.
211
212PH/37 When running in the test harness, use -odi for submitted messages (e.g.
213 bounces) except when queue_only is set, to avoid logging races between
214 the different processes.
215
145396a6
PH
216PH/38 Panic-die if .include specifies a non-absolute path.
217
3cd34f13
PH
218PH/39 A tweak to the "H" retry rule from its user.
219
11121d3d
JJ
220JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
221 a label. They prevented compilation on older perls.
222
223JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
224 a warning to be raised on newish perls.
225
226JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
227 on queue. Changes to match documented behaviour of showing count of
228 messages matching specified criteria.
229
8def5aaf
PH
230PH/40 Changed the default ident timeout from 30s to 5s.
231
929ba01c
PH
232PH/41 Added support for the use of login_cap features, on those BSD systems
233 that have them, for controlling the resources used by pipe deliveries.
234
2632889e
PH
235PH/42 The content-scanning code uses fopen() to create files in which to put
236 message data. Previously it was not paying any attention to the mode of
237 the files. Exim runs with umask(0) because the rest of the code creates
238 files with open(), and sets the required mode explicitly. Thus, these
239 files were ending up world-writeable. This was not a big issue, because,
240 being within the spool directory, they were not world-accessible. I have
241 created a function called modefopen, which takes an additional mode
242 argument. It sets umask(777), creates the file, chmods it to the required
243 mode, then resets the umask. All the relevant calls to fopen() in the
244 content scanning code have been changed to use this function.
245
944a9c55
PH
246PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
247 to 24 hours. This avoids potential overflow problems when processing G
248 and H retry rules. I suspect nobody ever tinkers with this value.
249
4a23603b
PH
250PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
251
4730f942
PH
252PH/45 When the plaintext authenticator is running as a client, the server's
253 challenges are checked to ensure they are valid base64 strings. By
254 default, the authentication attempt is cancelled if an invalid string is
255 received. Setting client_ignore_invalid_base64 true ignores these errors.
256 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
257 they are received. Thus, the responses can be made to depend on the
258 challenges. If an invalid string is ignored, an empty string is placed in
259 the variable.
260
30dba1e6
PH
261PH/46 Messages that are created by the autoreply transport now contains a
262 References: header, in accordance with RFCs 2822 and 3834.
263
382afc6b
PH
264PH/47 Added authenticated_sender_force to the smtp transport.
265
a86229cf
PH
266PH/48 The ${prvs expansion was broken on systems where time_t was long long.
267
50c99ba6
PH
268PH/49 Installed latest patch from the Sieve maintainer.
269
d35e429d
PH
270PH/50 When an Exim quota was set without a file count quota, and mailbox_size
271 was also set, the appendfile transport was unnecessarily scanning a
272 directory of message files (e.g. for maildir delivery) to find the count
273 of files (along with the size), even though it did not need this
274 information. It now does the scan only if it needs to find either the
275 size of the count of files.
276
f90d018c
PH
277PH/51 Added ${time_eval: to convert Exim time strings into seconds.
278
75def545
PH
279PH/52 Two bugs concerned with error handling when the smtp transport is
280 used in LMTP mode:
281
282 (i) Exim was not creating retry information for temporary errors given
283 for individual recipients after the DATA command when the smtp transport
284 was used in LMTP mode. This meant that they could be retried too
285 frequently, and not timed out correctly.
286
287 (ii) Exim was setting the flag that allows error details to be returned
288 for LMTP errors on RCPT commands, but not for LMTP errors for individual
289 recipients that were returned after the DATA command.
290
291PH/53 This is related to PH/52, but is more general: for any failing address,
292 when detailed error information was permitted to be returned to the
293 sender, but the error was temporary, then after the final timeout, only
294 "retry timeout exceeded" was returned. Now it returns the full error as
295 well as "retry timeout exceeded".
296
c46782ef
PH
297PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
298 do this, and (what is worse) MTAs that accept it.
299
71fafd95
PH
300PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
301 will now be deprecated.
302
2c5db4fd
PH
303PH/56 New os.c-cygwin from the Cygwin maintainer.
304
9cf6b11a
JJ
305JJ/06 exipick: added --unsorted option to allow unsorted output in all output
306 formats (previously only available in exim formats via -bpr, -bpru,
307 and -bpra. Now also available in native and exiqgrep formats)
308
309JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
310 with very large, slow to parse queues
311
312JJ/08 exipick: added ! as generic prefix to negate any criteria format
313
314JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
315
898d150f
PH
316PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
317 responses to authentication challenges, though it was showing the
318 challenges; (ii) I've removed the CR characters from the debug output for
319 SMTP output lines.
320
46218253
PH
321PH/58 Allow for the insertion of a newline as well as a space when a string
322 is turned into more than one encoded-word during RFC 2047 encoding. The
323 Sieve code now uses this.
324
e97957bc
PH
325PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
326 data_4xx, lost_connection, tls_required.
327
81e509d7
PH
328PH/60 When a VRFY deferred or FAILED, the log message rather than the user
329 message was being sent as an SMTP response.
330
3d240ff7
PH
331PH/61 Add -l and -k options to exicyclog.
332
b37c4101
PH
333PH/62 When verifying, if an address was redirected to one new address, so that
334 verification continued, and the new address failed or deferred after
335 having set something in $address_data, the value of $address_data was not
336 passed back to the ACL. This was different to the case when no
337 redirection occurred. The value is now passed back in both cases.
338
79378e0f
PH
339PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
340 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
341 use login_cap.h, so on its own it isn't the distinguishing feature. The
342 new name refers directly to the setclassresources() function.
343
e49c7bb4
PH
344PH/65 Added configuration files for NetBSD3.
345
d114ec46
PH
346PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
347
f3d7df6c
PH
348PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
349 is preferred over IPv4.
350
715ab376
PH
351PH/68 The bounce_return_message and bounce_return_body options were not being
352 honoured for bounces generated during the reception of non-SMTP messages.
353 In particular, this applied to messages rejected by the ACL. This bug has
354 been fixed. However, if bounce_return_message is true and bounce_return_
355 body is false, the headers that are returned for a non-SMTP message
356 include only those that have been read before the error was detected.
357 (In the case of an ACL rejection, they have all been read.)
358
6b31b150
PH
359PH/69 The HTML version of the specification is now built in a directory called
360 spec_html instead of spec.html, because the latter looks like a path with
361 a MIME-type, and this confuses some software.
362
363PH/70 Catch two compiler warnings in sieve.c.
364
d515a917
PH
365PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
366 function verify_get_ident() calls ip_connect() to connect a socket, but
367 if the "connect()" function timed out, ip_connect() used to close the
368 socket. However, verify_get_ident() also closes the socket later, and in
369 between Exim writes to the log, which may get opened at this point. When
370 the socket was closed in ip_connect(), the log could get the same file
371 descriptor number as the socket. This naturally causes chaos. The fix is
372 not to close the socket in ip_connect(); the socket should be closed by
373 the function that creates it. There was only one place in the code where
374 this was missing, in the iplookup router, which I don't think anybody now
375 uses, but I've fixed it anyway.
376
9b8fadde
PH
377PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
378 well as to direct DNS lookups. Otherwise the handling of names in host
379 lists is inconsistent and therefore confusing.
380
214e2000 381
5de37277
PH
382Exim version 4.60
383-----------------
384
cc38ddbf
PH
385PH/01 Two changes to the default runtime configuration:
386
387 (1) Move the checks for relay_from_hosts and authenticated clients from
388 after to before the (commented out) DNS black list checks.
389
390 (2) Add control=submission to the relay_from_hosts and authenticated
391 clients checks, on the grounds that messages accepted by these
392 statements are most likely to be submissions.
5de37277 393
72fdd6ae
PH
394PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
395
396 (1) Generate an error if the third argument for the ${prvs expansion is
397 not a single digit.
398
399 (2) Treat a missing third argument of ${prvscheck as if it were an empty
400 string.
401
402 (3) Reset the variables that are obtained from the first argument of
403 ${prvscheck and used in the second argument before leaving the code,
404 because their memory is reclaimed, so using them afterwards may do
405 silly things.
406
407 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
408 one (it's much easier than Tom thought :-).
409
410 (5) Because of (4), we can now allow for the use of $prvscheck_result
411 inside the third argument.
cb9328de 412
cb741023
PH
413PH/03 For some reason, the default setting of PATH when running a command from
414 a pipe transport was just "/usr/bin". I have changed it to
415 "/bin:/usr/bin".
416
f174f16e
PH
417PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
418 anything to be listed in the output from -bV.
b2f5a032 419
c25242d7
PH
420PH/05 When a filter generated an autoreply, the entire To: header line was
421 quoted in the delivery log line, like this:
422
423 => >A.N.Other <ano@some.domain> <original@ddress> ...
424
425 This has been changed so that it extracts the operative address. There
426 may be more than one such address. If so, they are comma-separated, like
427 this:
428
429 => >ano@some.domain,ona@other.domain <original@ddress> ...
430
82c19f95
PH
431PH/06 When a client host used a correct literal IP address in a HELO or EHLO
432 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
433 not being looked up in the rDNS to get a host name, Exim was showing the
434 IP address twice in Received: lines, even though the IP addresses were
435 identical. For example:
436
437 Received: from [1.2.3.4] (helo=[1.2.3.4])
438
439 However, if the real host name was known, it was omitting the HELO data
440 if it matched the actual IP address. This has been tidied up so that it
441 doesn't show the same IP address twice.
442
d7ffbc12
PH
443PH/07 When both +timestamp and +memory debugging was on, the value given by
444 $tod_xxx expansions could be wrong, because the tod_stamp() function was
445 called by the debug printing, thereby overwriting the timestamp buffer.
446 Debugging no longer uses the tod_stamp() function when +timestamp is set.
447
9f526266
PH
448PH/08 When the original message was included in an autoreply transport, it
449 always said "this is a copy of the message, including all the headers",
450 even if body_only or headers_only was set. It now gives an appropriate
451 message.
452
87fcc8b9
PH
453PH/09 Applied a patch from the Sieve maintainer which:
454
455 o fixes some comments
456 o adds the (disabled) notify extension core
457 o adds some debug output for the result of if/elsif tests
458 o points to the current vacation draft in the documentation
459 and documents the missing references header update
460
461 and most important:
462
463 o fixes a bug in processing the envelope test (when testing
464 multiple envelope elements, the last element determinted the
465 result)
466
456682f5
PH
467PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
468 Electronic Mail") by including:
469
470 Auto-submitted: auto-generated
471
472 in the messages that it generates (bounce messages and others, such as
473 warnings). In the case of bounce messages for non-SMTP mesages, there was
474 also a typo: it was using "Auto_submitted" (underscore instead of
475 hyphen). Since every message generated by Exim is necessarily in response
476 to another message, thes have all been changed to:
477
478 Auto-Submitted: auto-replied
479
480 in accordance with these statements in the RFC:
481
482 The auto-replied keyword:
483
484 - SHOULD be used on messages sent in direct response to another
485 message by an automatic process,
486
487 - MUST NOT be used on manually-generated messages,
488
489 - MAY be used on Delivery Status Notifications (DSNs) and Message
490 Disposition Notifications (MDNs),
491
492 - MUST NOT be used on messages generated by automatic or periodic
493 processes, except for messages which are automatic responses to
494 other messages.
495
3e46c1aa
PH
496PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
497 to the default Received: header definition.
456682f5 498
49826d12
PH
499PH/12 Added log selector acl_warn_skipped (default on).
500
eba0c039
PH
501PH/13 After a successful wildlsearch lookup, discard the values of numeric
502 variables because (a) they are in the wrong storage pool and (b) even if
503 they were copied, it wouldn't work properly because of the caching.
504
a0d6ba8a
PH
505PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
506 checking when decoding. Apparently there are clients that generate
507 overlong encoded strings. Why am I not surprised?
508
f0917727
PH
509PH/15 If the first argument of "${if match_address" was not empty, but did not
510 contain an "@" character, Exim crashed. Now it writes a panic log message
511 and treats the condition as false.
512
096fee00
PH
513PH/16 In autoreply, treat an empty string for "once" the same as unset.
514
024bd3c2
PH
515PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
516 extension "envelope-auth". The code is finished and in agreement with
517 other implementations, but there is no documentation so far and in fact,
518 nobody wrote the draft yet. This extension is currently #undef'ed, thus
519 not changing the active code.
520
521 Print executed "if" and "elsif" statements when debugging is used. This
522 helps a great deal to understand what a filter does.
523
524 Document more things not specified clearly in RFC3028. I had all this
525 sorted out, when out of a sudden new issues came to my mind. Oops."
526
df199fec
PH
527PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
528 (Bugzilla #53).
529
d27f1df3
PH
530PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
531 canonical form (as documented). However, after a host name lookup from
532 the IP address, check_host() was doing a simple string comparison with
533 addresses acquired from the DNS when checking that the found name did
534 have the original IP as one of its addresses. Since any found IPv6
535 addresses are likely to be in abbreviated form, the comparison could
536 fail. Luckily, there already exists a function for doing the comparison
537 by converting both addresses to binary, so now that is used instead of
538 the text comparison.
539
96776534
PH
540PH/20 There was another similar case to PH/19, when a complete host name was
541 given in a host list; looking up its IP address could give an abbreviated
542 form, whereas the current host's name might or might not be abbreviated.
543 The same fix has been applied.
544
5de37277 545
9a799bc0
PH
546Exim version 4.54
547-----------------
548
549PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
550 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
551 It now does.
552
99a4b039
PH
553PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
554 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
555
556PH/03 Typo: missing ".o" in src/pcre/Makefile.
557
4b233853
PH
558PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
559 header line, restrict the check to what is listed in RFCs 2369 and 2929.
560 Also, for "Auto-Submitted", treat anything other than "no" as
561 non-personal, in accordance with RFC 3834. (Previously it treated
562 anything starting "auto-" as non-personal.)
563
8857ccfd
PH
564TF/01 The control=submission/name=... option had a problem with syntax
565 errors if the name included a slash character. The /name= option
566 now slurps the rest of the string, so it can include any characters
567 but it must come last in the list of options (after /sender_retain
568 or /domain=).
569
433a2980
PH
570PH/05 Some modifications to the interface to the fake nameserver for the new
571 testing suite.
572
3e46c1aa 573
9a799bc0 574
e3a311ba
TK
575Exim version 4.53
576-----------------
577
578TK/01 Added the "success_on_redirect" address verification option. See
579 NewStuff for rationale and an example.
580
13b685f9
PH
581PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
582
395ff96d
PH
583PH/02 Patch to exigrep to allow it to work on syslog lines.
584
5b68f6e4
PH
585PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
586 fread() to skip over the body file's header line, because in Cygwin the
587 header line is locked and is inaccessible.
588
1ab52c69
PH
589PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
590 co-exist for some time) to make it clear that it is the Exim ID that is
591 referenced, not the Message-ID: header line.
592
b07e6aa3
PH
593PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
594 string_format() function, because snprintf() does not exist on all
595 operating systems.
596
254e032f
PH
597PH/06 The use of forbid_filter_existstest now also locks out the use of the
598 ${stat: expansion item.
599
3af76a81
PH
600PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
601 protocol synchronization error", to keep the pedants happy.
602
2548ba04
PH
603PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
604 well as for IRIX systems, when gcc is being used. See the host.c source
605 file for comments.
606
b6c6011d
PH
607PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
608
cf39cf57
PH
609PH/10 Named domain lists were not working if used in a queue_smtp_domains
610 setting.
611
f1513293
PH
612PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
613 transport and to the smtp transport in LMTP mode.
614
727549a4
PH
615TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
616
af46795e
PH
617PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
618 run a filter in a subprocess. This could lead to confusion in subsequent
619 lookups in the parent process. There should also be a search_tidyup() at
620 the end of the subprocess.
621
d7b47fd0
PH
622PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
623 only if the host matched helo_try_verify_hosts, which caused the
624 verification to occur when the EHLO/HELO command was issued. The ACL just
625 tested the remembered result. Now, if a previous verification attempt has
626 not happened, "verify = helo" does it there and then.
627
ee744174
JJ
628JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
629
b582ab87
PH
630TK/03 Fix log output including CR from clamd.
631
41a13e0a
PH
632PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
633 exist provoked a memory error which could cause a segfault.
634
f625cc5a
PH
635PH/15 Installed PCRE 6.2
636
637PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
638
21f7af35
PH
639PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
640 of the problem. Specifically, suggested +O2 rather than +O1 for the
641 HP-UX compiler.
642
31480e42
PH
643PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
644
2d280592
PH
645PH/20 If a delivery was routed to a non-standard port by means of an SRV
646 record, the port was not correctly logged when the outgoing_port log
647 selector was set (it logged the transort's default port).
648
7cd1141b
PH
649PH/21 Added support for host-specific ports to manualroute, queryprogram,
650 fallback_hosts, and "hosts" in the smtp transport.
651
652PH/22 If the log selector "outgoing_port" is set, the port is now also given on
653 host errors such as "Connection refused".
654
750af86e
PH
655PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
656 authentication with radiusclient 0.4.9:
657
658 - Error returned from rc_read_config was caught wrongly
659 - Username/password not passed on to radius server due to wrong length.
660
661 The presumption is that some radiusclient API changes for 4.51/PH/17
662 were not taken care of correctly. The code is still untested by me (my
663 Linux distribution still has 0.3.2 of radiusclient), but it was
664 contributed by a Radius user.
665
666PH/24 When doing a callout, the value of $domain wasn't set correctly when
667 expanding the "port" option of the smtp transport.
668
4304270b
TK
669TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
670 while reading a MIME header. Thanks to Tom Hughes for a patch.
671
750af86e
PH
672PH/24 Include config.h inside local_scan.h so that configuration settings are
673 available.
674
64ffc24f
PH
675PH/25 Make $smtp_command_argument available after all SMTP commands. This means
676 that in an ACL for RCPT (for example), you can examine exactly what was
677 received.
678
5dd9625b
PH
679PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
680 commands, but it was not correctly comparing the address with the actual
681 client host address. Thus, it would show the EHLO address in Received:
682 header lines when this was not necessary.
683
5591031b
PH
684PH/27 Added the % operator to ${eval:}.
685
ba18e66a
PH
686PH/28 Exim tries to create and chdir to its spool directory when it starts;
687 it should be ignoring failures (because with -C, for example, it has lost
688 privilege). It wasn't ignoring creation failures other than "already
689 exists".
690
9cec981f
PH
691PH/29 Added "crypteq" to the list of supported features that Exim outputs when
692 -bV or -d is used.
693
aa2b5c79
PH
694PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
695 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
696 too many continuations, the temporary file was not being removed, and the
697 return code was incorrect.
aa2b5c79 698
48a53b7f
PH
699PH/31 Missing "BOOL" in function definition in filtertest.c.
700
1c59d63b
PH
701PH/32 Applied Sieve patches from the maintainer.
702
671012da
TK
703TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
704
1509d3a8
PH
705PH/33 Added "verify = not_blind".
706
707PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
708 Local/Makefile (with some defaults set). These are used in built scripts
709 such as exicyclog, but they have never been used in the exim_install
710 script (though there are many overriding facilities there). I have
711 arranged that the exim_install script now takes note of these two
712 settings.
713
714PH/35 Installed configuration files for Dragonfly.
715
2fe1a124
PH
716PH/36 When a locally submitted message by a trusted user did not contain a
717 From: header, and the sender address was obtained from -f or from an SMTP
718 MAIL command, and the trusted user did not use -F to supply a sender
719 name, $originator_name was incorrectly used when constructing a From:
720 header. Furthermore, $originator_name was used for submission mode
721 messages from external hosts without From: headers in a similar way,
722 which is clearly wrong.
723
8800895a
PH
724PH/37 Added control=suppress_local_fixups.
725
ccfdb010
PH
726PH/38 When log_selector = +received_sender was set, and the addition of the
727 sender made the log line's construction buffer exactly full, or one byte
728 less than full, an overflow happened when the terminating "\n" was
729 subsequently added.
730
1130bfb0
PH
731PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
732 when the result of a list match is failure because a DNS lookup failed.
733
ebcb507f
PH
734PH/40 RM_COMMAND is now used in the building process.
735
c35e155c
PH
736PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
737 the "build-* directories that it finds.
738
95d1f782
PH
739PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
740 address in a domain literal was a prefix of an interface address.
741
fd6de02e
PH
742PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
743 when verifying a sender address, unless rewrite_headers is false.
744
58de37c5
PH
745PH/44 Wrote a long comment about why errors_to addresses are verified as
746 recipients, not senders.
747
261cf466
TF
748TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
749 the ratelimit ACL was added.
750
3ee512ff
PH
751PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
752
e08c430f
PH
753PH/46 Added extra information about PostgreSQL errors to the error string.
754
bef5a11f
PH
755PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
756 avoiding the need to install special zones in a real server. This is
757 backwards compatible; if it can't find the fake resolver, it drops back.
758 Thus, both old and new test suites can be run.
759
7546de58
TF
760TF/02 Added util/ratelimit.pl
761
e5d5a95f
TF
762TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
763 clock is set back in time.
764
2e88a017
TF
765TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
766 Candler <B.Candler@pobox.com>.
767
a5f65aa4
TF
768TF/05 The fix for PH/43 was not completely correct; widen_domains is always
769 OK for addresses that are the result of redirections.
770
e7726cbf
PH
771PH/48 A number of further additions for the benefit of the new test suite,
772 including a fake gethostbyname() that interfaces to the fake DNS resolver
773 (see PH/47 above).
774
a7fdad5b
TF
775TF/06 The fix for widen_domains has also been applied to qualify_single and
776 search_parents which are the other dnslookup options that can cause
777 header rewrites.
778
6af56900
PH
779PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
780 type ("H").
781
0925ede6
PH
782PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
783
66afa403
TF
784TF/07 Exim produced the error message "an SRV record indicated no SMTP
785 service" if it encountered an MX record with an empty target hostname.
786 The message is now "an MX or SRV record indicated no SMTP service".
787
0154e85a
TF
788TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
789 if the DNS of the sending site is misconfigured. This is quite a
790 common situation. This change restores the behaviour of treating a
791 helo verification defer as a failure.
792
16f12c76
PH
793PH/51 If self=fail was set on a router, the bounce message did not include the
794 actual error message.
795
bbe902f0 796
e5a9dba6
PH
797Exim version 4.52
798-----------------
799
800TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
801
22c3b60b
PH
802PH/01 When a transport filter timed out in a pipe delivery, and the pipe
803 command itself ended in error, the underlying message about the transport
804 filter timeout was being overwritten with the pipe command error. Now the
805 underlying error message should be appended to the second error message.
806
06a9b4b5
PH
807TK/01 Fix poll() being unavailable on Mac OSX 10.2.
808
c1ac6996
PH
809PH/02 Reduce the amount of output that "make" produces by default. Full output
810 can still be requested.
811
9c7a242c
PH
812PH/03 The warning log line about a condition test deferring for a "warn" verb
813 was being output only once per connection, rather than after each
814 occurrence (because it was using the same function as for successful
815 "warn" verbs). This seems wrong, so I have changed it.
816
87ba3f5f
PH
817TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
818 it should not have, which might have caused a crash in the right
819 circumstances, but probably never did.
820
821PH/04 Installed a modified version of Tony Finch's patch to make submission
822 mode fix the return path as well as the Sender: header line, and to
823 add a /name= option so that you can make the user's friendly name appear
824 in the header line.
825
29aba418
TF
826TF/03 Added the control = fakedefer ACL modifier.
827
fe0dab11
TF
828TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
829 Mark Lowes for thorough testing.
870f6ba8 830
11d337a4
TK
831TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
832
833TK/03 Merged latest SRS patch from Miles Wilton.
834
415c8f3b
PH
835PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
836 with the definition in sysexits.h (which is #included earlier).
837 Fortunately, Exim does not actually use EX_OK. The code used to try to
838 preserve the sysexits.h value, by assumimg that macro definitions were
839 scanned for macro replacements. I have been disabused of this notion,
840 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 841
958541e9
PH
842PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
843 in the smtp transport. When a block could not be written in a single
844 write() function, the timeout was being re-applied to each part-write.
845 This seems wrong - if the receiver was accepting one byte at a time it
846 would take for ever. The timeout is now adjusted when this happens. It
847 doesn't have to be particularly precise.
848
c206415f
TK
849TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
850 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
851
2a4be8f9
PH
852PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
853 without a domain if the check to <postmaster@domain> fails.
854
1cba11c5
SC
855SC/01 Eximstats: added -xls and the ability to specify output files
856 (patch written by Frank Heydlauf).
857
858SC/02 Eximstats: use FileHandles for outputing results.
859
860SC/03 Eximstats: allow any combination of xls, txt, and html output.
861
862SC/04 Eximstats: fixed display of large numbers with -nvr option
863
864SC/05 Eximstats: fixed merging of reports with empty tables.
865
866SC/06 Eximstats: added the -include_original_destination flag
867
868SC/07 Eximstats: removed tabs and trailing whitespace.
869
1005d00e
TK
870TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
871
872TK/06 MBOX spool code: Add real "From " MBOX separator line
873 so the .eml file is really in mbox format (even though
874 most programs do not really care). Patch from Alex Miller.
875
876TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
877 The latter is generated from $received_to and is only set if the
878 message has one envelope recipient. SA can use these headers,
879 obviously out-of-the-box. Patch from Alex Miller.
880
9b4768fa
PH
881PH/08 The ${def test on a variable was returning false if the variable's
882 value was "0", contrary to what the specification has always said!
883 The result should be true unless the variable is empty.
884
885PH/09 The syntax error of a character other than { following "${if
886 def:variable_name" (after optional whitespace) was not being diagnosed.
887 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
888 accidental colon was present, for example, could give incorrect results.
889
0d7eb84a
PH
890PH/10 Tidied the code in a number of places where the st_size field of a stat()
891 result is used (not including appendfile, where other changes are about
892 to be made).
893
894PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
895 This involved changing a lot of size variables from int to off_t. It
896 should work with maildirs and everything.
897
40727bee
TK
898TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
899 spamd dying while we are connected to it.
900
554d2369
TF
901TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
902 <jgh@wizmail.org>
903
1f922db1
PH
904PH/12 Applied Alex Kiernan's patch for the API change for the error callback
905 function for BDB 4.3.
906
ef213c3b
PH
907PH/13 Changed auto_thaw such that it does not apply to bounce messages.
908
8ac170f3
PH
909PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
910 the sources for PCRE have been re-arranged and more files are now
911 involved.
912
b1c749bb
PH
913PH/15 The code I had for printing potentially long long variables in PH/11
914 above was not the best (it lost precision). The length of off_t variables
915 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
916 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
917 to be "long long int" or "long int". This is needed for the internal
918 formatting function string_vformat().
b1c749bb 919
4aac9b49
PH
920PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
921 the configuration file to be ":syslog", then the script "guesses" where
922 the logs files are, rather than using the compiled in default. In our
923 case the guess is not the same as the compiled default, so the script
924 suddenly stopped working when I started to use syslog. The patch checks
925 to see if log_file_path is "". If so, it attempts to read it from exim
926 with no configuration file to get the compiled in version, before it
927 falls back to the previous guessing code."
928
294520c8
TK
929TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
930 implementing BATV in an Exim configuration. See NewStuff for the gory
931 details.
932
5bd022fe
PH
933PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
934 Makefile that are specific to HP-UX.
935
90e9ce59
PH
936PH/18 If the "use_postmaster" option was set for a recipient callout together
937 with the "random" option, the postmaster address was used as the MAIL
938 FROM address for the random test, but not for the subsequent recipient
939 test. It is now used for both.
940
5ea81592
PH
941PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
942 patch removes a few documentation additions to RFC 3028, because the
943 latest draft now contains them. It adds the new en;ascii-case comparator
944 and a new error check for 8bit text in MIME parts. Comparator and
945 require names are now matched exactly. I enabled the subaddress
946 extension, but it is not well tested yet (read: it works for me)."
947
c6c2dc1d
PH
948PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
949 rework some of the code of TK/09 above to avoid the hardwired use of
950 "%lld" and "long long". Replaced the call to snprintf() with a call to
951 string_vformat().
952
fffffe4c
PH
953PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
954 records point to non-existent hosts", "retry timeout exceeded", and
955 "retry time not reached for any host after a long failure period".
ca02eafb 956
9a26b6b2
PH
957PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
958 experimental DomainKeys support:
959
960 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
961 (2) On an error such as an illegally used "control", the wrong name for
962 the control was given.
963
964 These problems did NOT occur unless DomainKeys support was compiled.
965
4aee0225
PH
966PH/23 Added daemon_startup_retries and daemon_startup_sleep.
967
32d668a5
PH
968PH/24 Added ${if match_ip condition.
969
8187c3f3
PH
970PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
971 databases so that it will be absolutely obvious if a crash occurs in the
972 DB library. This is a regular occurrence (often caused by mis-matched
973 db.h files).
974
ff790e47 975PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
976 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
977 picked up on a user's system that detects such things. There doesn't seem
978 to be a gcc warning option for this - only an attribute that has to be
979 put on the function's prototype. It seems that in Fedora Core 4 they have
980 set this on a number of new functions. No doubt there will be more in due
981 course.
ff790e47 982
5417f6d1
PH
983PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
984 specify a transport. However, if an address that was verified by such a
985 router was the subject of a callout, Exim crashed because it tried to
986 read the rcpt_include_affixes from the non-existent transport. Now it
987 just assumes that the setting of that option is false. This bug was
988 introduced by 4.51/PH/31.
989
59cf8544
PH
990PH/28 Changed -d+all to exclude +memory, because that information is very
991 rarely of interest, but it makes the output a lot bigger. People tend to
992 do -d+all out of habit.
993
e7ad8a65
PH
994PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
995 code in os-type was giving problems when libc.so lives in lib64, like on
996 x86_64 Fedora Core.
997
ade42478
PH
998PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
999 aren't the modern standard, and it seems that some systems' include files
1000 don't always have them. Exim was already checking for some of the newer
1001 ones like T_AAAA, and defining it itself. I've added checks for all the
1002 record types that Exim uses.
1003
182ad5cf
PH
1004PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1005 not automatically generating a new one, as it is supposed to. This
1006 prevented TLS from working. If the file did exist, but contained invalid
1007 data, a new version was generated, as expected. It was only the case of a
1008 non-existent file that was broken.
1009
b0d9fc80
TK
1010TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1011 with a change in libdomainkeys > 0.64.
1012
1013TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1014 from DNS. If the selector record carries the flag, it now has
1015 precedence over the domain-wide flag.
1016
1017TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1018
47c7a64a
PH
1019PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1020 the use of a port name that isn't defined in /etc/services) occurred, the
1021 message was deferred as in a normal delivery, and thus remained on the
1022 spool, instead of being failed because of the mua_wrapper setting. This
1023 is now fixed, and I tidied up some of the mua_wrapper messages at the
1024 same time.
1025
a388bce4
SC
1026SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1027 the messages in a hash of arrays rather than using individual hashes.
1028 This is a bit cleaner and results in dramatic memory savings, albeit
1029 at a slight CPU cost.
1030
1031SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1032 as requested by Marc Sherman.
1033
1034SC/10 Eximstats: added histograms for user specified patterns as requested
1035 by Marc Sherman.
1036
0793e4ed
SC
1037SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1038
c58b88df
PH
1039PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1040 fopen() in the content-scanning modules that did not already have it.
1041
e7ad8a65 1042
7982096b
PH
1043Exim version 4.51
1044-----------------
1045
1a46a8c5
PH
1046TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1047 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1048
2f079f46 1049TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1050
1051TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1052
1053PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1054 to test Sieve filters that use "vacation".
1055
1056PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1057 that changes the way the GnuTLS parameters are stored in the cache file.
1058 The new format can be generated externally. For backward compatibility,
1059 if the data in the cache doesn't make sense, Exim assumes it has read an
1060 old-format file, and it generates new data and writes a new file. This
1061 means that you can't go back to an older release without removing the
1062 file.
1063
1064PH/03 A redirect router that has both "unseen" and "one_time" set does not
1065 work if there are any delivery delays because "one_time" forces the
1066 parent to be marked "delivered", so its unseen clone is never tried
1067 again. For this reason, Exim now forbids the simultaneous setting of
1068 these two options.
1069
1070PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1071 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1072 entry if you want to know the details. The fix, however, neglected to
1073 consider the case when local delivery batching is involved. The test for
1074 "previously delivered" was not happening when checking to see if an
1075 address could be batched with a previous (undelivered) one; under
1076 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1077 address.
1a46a8c5
PH
1078
1079PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1080 in its include files, and this causes problems building Exim.
1081
1082PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1083 header_syntax) but Exim was just ignoring anything given after a slash.
1084 In particular, this caused confusion with an attempt to use "verify =
1085 reverse_host_lookup/defer_ok". An error is now given when options are
1086 supplied for verify items that do not have them. (Maybe reverse_host_
1087 lookup should have a defer_ok option, but that's a different point.)
1088
1089PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1090 defined by RFC 821) to 2048, because there were problems with some AUTH
1091 commands, and RFC 1869 says the size should be increased for extended
1092 SMTP commands that take arguments.
1093
1094PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1095 Finch).
1096
1097PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1098 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1099
49c2d5ea
PH
1100PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1101 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1102 whatever). Otherwise the password may appear in the log. Following change
1103 PH/42 below, there is no longer a chance of it appearing in a bounce
1104 message.
49c2d5ea 1105
bf759a8b
PH
1106PH/11 Installed exipick version 20050225.0 from John Jetmore.
1107
83364d30
PH
1108PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1109 of its addresses was ever tried. (Bugzilla bug #2.)
1110
7999bbd7
PH
1111PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1112 the result incorrectly in the debug output. (It correctly added a newline
1113 to what was transported.)
1114
7dbf77c9
PH
1115TF/01 Added $received_time.
1116
74e0617f
PH
1117PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1118 commented out examples of how to interface to a virus scanner and to
1119 SpamAssassin. Also added commented examples of av_scanner and
1120 spamd_address settings.
1121
2f079f46
PH
1122PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1123 and controls are allowed in which ACLs. There were a couple of minor
1124 errors. Some of the entries in the conditions table (which is a table of
1125 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1126 negation of where the condition IS allowed.
1127
8c841523
PH
1128PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1129
7766a4f0
PH
1130PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1131 header file does not have a version number, so I've had to invent a new
1132 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1133 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1134 radiusclient), but it was contributed by a Radius user.
1135
8b417f2c
PH
1136PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1137 files or directories, for OpenSSL.
1138
901f42cb
PH
1139PH/19 When an Exim process that is running as root has to create an Exim log
1140 file, it does so in a subprocess that runs as exim:exim so as to get the
1141 ownership right at creation (otherwise, other Exim processes might see
1142 the file with the wrong ownership). There was no test for failure of this
1143 fork() call, which would lead to the process getting stuck as it waited
1144 for a non-existent subprocess. Forks do occasionally fail when resources
1145 run out. I reviewed all the other calls to fork(); they all seem to check
1146 for failure.
1147
f9b9210e
PH
1148PH/20 When checking for unexpected SMTP input at connect time (before writing
1149 the banner), Exim was not dealing correctly with a non-positive return
1150 from the read() function. If the client had disconnected by this time,
1151 the result was a log entry for a synchronization error with an empty
1152 string after "input=" when read() returned zero. If read() returned -1
1153 (an event I could not check), uninitialized data bytes were printed.
1154 There were reports of junk text (parts of files, etc) appearing after
1155 "input=".
1156
54cdb463
PH
1157PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1158
cf00dad6
PH
1159PH/22 Added support for macro redefinition, and (re)definition in between
1160 driver and ACL definitions.
1161
acb1b346
PH
1162PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1163 forgetting to use the resulting value; it was using the unexpanded value.
1164
c5ddb310
PH
1165PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1166 hadn't been configured. The fix is from Juergen Kreileder, who
1167 understands it better than I do:
1168
1169 "Here's what I see happening with three configured cyrus_sasl
1170 authenticators configured (plain, login, cram-md5):
1171
1172 On startup auth_cyrus_sasl_init() gets called for each of these.
1173 This means three calls to sasl_listmech() without a specified mech_list.
1174 => SASL tests which mechs of all available mechs actually work
1175 => three warnings about OTP not working
1176 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1177
1178 With the patch, sasl_listmech() also gets called three times. But now
1179 SASL's mech_list option is set to the server_mech specified in the the
1180 authenticator. Or in other words, the answer from sasl_listmech()
1181 gets limited to just the mech you're testing for (which is different
1182 for each call.)
1183 => the return list contains just 'plain' or 'login', 'cram-md5' or
1184 nothing depending on the value of ob->server_mech.
1185
1186 I've just tested the patch: Authentication still works fine,
1187 unavailable mechs specified in the exim configuration are still
1188 caught, and the auth.log warnings about OTP are gone."
1189
31619da6
PH
1190PH/25 When debugging is enabled, the contents of the command line are added
1191 to the debugging output, even when log_selector=+arguments is not
1192 specified.
1193
bebaf0fc
PH
1194PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1195 answer is "GNU", and only if the return is "GNU/something" is the answer
1196 "Linux".
1197
475fe28a
PH
1198PH/27 $acl_verify_message is now set immediately after the failure of a
1199 verification in an ACL, and so is available in subsequent modifiers. In
1200 particular, the message can be preserved by coding like this:
1201
1202 warn !verify = sender
1203 set acl_m0 = $acl_verify_message
1204
1205 Previously, $acl_verify_message was set only while expanding "message"
1206 and "log_message" when a very denied access.
1207
7e8bec7a
PH
1208PH/28 Modified OS/os.c-Linux with
1209
1210 -#ifndef OS_LOAD_AVERAGE
1211 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1212
1213 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1214 nomenclature these days.)
1215
e4a89c47
PH
1216PH/29 Installed patch from the Sieve maintainer that adds the options
1217 sieve_useraddress and sieve_subaddress to the redirect router.
1218
5ca2a9a1
PH
1219PH/30 In these circumstances:
1220 . Two addresses routed to the same list of hosts;
1221 . First host does not offer TLS;
1222 . First host accepts first address;
1223 . First host gives temporary error to second address;
1224 . Second host offers TLS and a TLS session is established;
1225 . Second host accepts second address.
1226 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1227 and peerdn, if requested) that were in fact used only for the second
1228 address.
7e8bec7a 1229
c688b954
PH
1230PH/31 When doing a callout as part of verifying an address, Exim was not paying
1231 attention to any local part prefix or suffix that was matched by the
1232 router that accepted the address. It now behaves in the same way as it
1233 does for delivery: the affixes are removed from the local part unless
1234 rcpt_include_affixes is set on the transport.
1235
fed77020
PH
1236PH/32 Add the sender address, as F=<...>, to the log line when logging a
1237 timeout during the DATA phase of an incoming message.
1238
7fe1560f
PH
1239PH/33 Sieve envelope tests were broken for match types other than :is. I have
1240 applied a patch sanctioned by the Sieve maintainer.
c688b954 1241
ebb6e6d5
PH
1242PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1243 the uid or gid is negative. A case of a negative gid caused this to be
1244 noticed. The fix allows for either to be negative.
1245
9c4e8f60
PH
1246PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1247 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1248 overlooked.
1249
1250PH/36 The change PH/12 above was broken. Fixed it.
1251
d7174846
PH
1252PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1253 the grounds that routing the same address twice would always produce the
1254 same answer. This might have been true once, but it is certainly no
1255 longer true now. Routing a child address may depend on the previous
1256 routing that produced that child. Some complicated redirection strategies
1257 went wrong when messages had multiple recipients, and made Exim's
1258 behaviour dependent on the order in which the addresses were given.
1259
1260 I have moved the duplicate checking until after the routing is complete.
1261 Exim scans the addresses that are assigned to local and remote
1262 transports, and removes any duplicates. This means that more work will be
1263 done, as duplicates will always all be routed, but duplicates are
1264 presumably rare, so I don't expect this is of any significance.
1265
1266 For deliveries to pipes, files, and autoreplies, the duplicate checking
1267 still happens during the routing process, since they are not going to be
1268 routed further.
1269
cfe75fc3
PH
1270PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1271 It corrects a timeout issue with spamd. This is Ian's comment: "The
1272 background is that sometimes spamd either never reads data from a
1273 connection it has accepted, or it never writes response data. The exiscan
1274 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1275 blindly assumes that writes won't block so it may never time out."
1276
be22d70e
PH
1277PH/39 Allow G after quota size as well as K and M.
1278
0612b098
PH
1279PH/40 The value set for $authenticated_id in an authenticator may not contain
1280 binary zeroes or newlines because the value is written to log lines and
1281 to spool files. There was no check on this. Now the value is run through
1282 the string_printing() function so that such characters are converted to
1283 printable escape sequences.
1284
2e0c1448
PH
1285PH/41 $message_linecount is a new variable that contains the total number of
1286 lines in the message. Compare $body_linecount, which is the count for the
1287 body only.
1288
447d236c
PH
1289PH/42 Exim no longer gives details of delivery errors for specific addresses in
1290 bounce and delay warning messages, except in certain special cases, which
1291 are as follows:
1292
1293 (a) An SMTP error message from a remote host;
1294 (b) A message specified in a :fail: redirection;
1295 (c) A message specified in a "fail" command in a system filter;
1296 (d) A message specified in a FAIL return from the queryprogram router;
1297 (e) A message specified by the cannot_route_message router option.
1298
1299 In these cases only, Exim does include the error details in bounce and
1300 warning messages. There are also a few cases where bland messages such
1301 as "unrouteable address" or "local delivery error" are given.
1302
d20976dc
PH
1303PH/43 $value is now also set for the "else" part of a ${run expansion.
1304
f656d135
PH
1305PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1306 being worked on, but at least Exim now implements the latest version to
1307 play with."
1308
2e2a30b4
PH
1309PH/45 In a pipe transport, although a timeout while waiting for the pipe
1310 process to complete was treated as a delivery failure, a timeout while
1311 writing the message to the pipe was logged, but erroneously treated as a
1312 successful delivery. Such timeouts include transport filter timeouts. For
1313 consistency with the overall process timeout, these timeouts are now
1314 treated as errors, giving rise to delivery failures by default. However,
1315 there is now a new Boolean option for the pipe transport called
1316 timeout_defer, which, if set TRUE, converts the failures into defers for
1317 both kinds of timeout. A transport filter timeout is now identified in
1318 the log output.
1319
9176e9f0
PH
1320PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1321 systems where "make" and "gmake" are different, calling "gmake" at top
1322 level broke things. I've arranged for the value of $(MAKE) to be passed
1323 from the Makefile to this script so that it can call the same version of
1324 "make".
1325
7982096b 1326
bbe902f0
PH
1327A note about Exim versions 4.44 and 4.50
1328----------------------------------------
1329
1330Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1331changes of various kinds. As a consequence, a big documentation update was
1332needed. This delayed the release for rather longer than seemed good, especially
1333in the light of a couple of (minor) security issues. Therefore, the changes
1334that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1335release. So 4.44 and 4.50 are in effect two different branches that both start
1336from 4.43.
1337
1338I have left the 4.50 change log unchanged; it contains all the changes since
13394.43. The change log for 4.44 is below; many of its items are identical to
1340those for 4.50. This seems to be the most sensible way to preserve the
1341historical information.
1342
1343
f7b63901 1344Exim version 4.50
495ae4b0
PH
1345-----------------
1346
5fe762f6
PH
1347 1. Minor wording change to the doc/README.SIEVE file.
1348
139059f6 1349 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1350 computation of the current number of files was incorrect.
495ae4b0 1351
7086e875
PH
1352 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1353 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1354 place.
1355
35af9f61
PH
1356 4. Give more explanation in the error message when the command for a transport
1357 filter fails to execute.
1358
b668c215
PH
1359 5. There are several places where Exim runs a non-Exim command in a
1360 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1361 was being done only for the command run by the queryprogram router. It is
1362 now done for all such subprocesses. The other cases are: ${run, transport
1363 filters, and the commands run by the lmtp and pipe transports.
1364
a494b1e1
PH
1365 6. Added CONFIGURE_GROUP build-time option.
1366
1367 7. Some older OS have a limit of 256 on the maximum number of file
1368 descriptors. Exim was using setrlimit() to set 1000 as a large value
1369 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1370 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1371
c5fcb476
PH
1372 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1373 was an oversight, and furthermore, ever since the addition of extra
1374 controls (e.g. 4.43/32), the checks on when to allow different forms of
1375 "control" were broken. There should now be diagnostics for all cases when a
1376 control that does not make sense is encountered.
1377
69358f02
PH
1378 9. Added the /retain_sender option to "control=submission".
1379
5be20824
PH
138010. $recipients is now available in the predata ACL (oversight).
1381
eb2c0248
PH
138211. Tidy the search cache before the fork to do a delivery from a message
1383 received from the command line. Otherwise the child will trigger a lookup
1384 failure and thereby defer the delivery if it tries to use (for example) a
1385 cached ldap connection that the parent has called unbind on.
1386
2a3eea10
PH
138712. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1388 of $address_data from the recipient verification was clobbered by the
1389 sender verification.
1390
139113. The value of address_data from a sender verification is now available in
1392 $sender_address_data in subsequent conditions in the ACL statement.
1393
23c7ff99
PH
139414. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1395
4deaf07d
PH
139615. Added a new option "connect=<time>" to callout options, to set a different
1397 connection timeout.
1398
926e1192
PH
139916. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1400 was its contents. (It was OK if the option was not defined at all.)
1401
650edc6f
PH
140217. A "Completed" log line is now written for messages that are removed from
1403 the spool by the -Mrm option.
1404
2c7db3f5
PH
140518. New variables $sender_verify_failure and $recipient_verify_failure contain
1406 information about exactly what failed.
1407
3d235903
PH
140819. Added -dd to debug only the daemon process.
1409
7c7ad977
PH
141020. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1411 handles timeouts, both on the server side and network timeouts. Renamed the
1412 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1413
981756db
PH
141421. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1415 It is now set to "smtps".
1416
d4eb88df
PH
141722. $host_address is now set to the target address during the checking of
1418 ignore_target_hosts.
1419
142023. When checking ignore_target_hosts for an ipliteral router, no host name was
1421 being passed; this would have caused $sender_host_name to have been used if
1422 matching the list had actually called for a host name (not very likely,
1423 since this list is usually IP addresses). A host name is now passed as
1424 "[x.x.x.x]".
1425
7d468ab8
PH
142624. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1427 code that specifies a non-restarting handler (typically sigaction() in
1428 modern systems) in an attempt to fix a rare and obscure crash bug.
1429
143025. Narrowed the window for a race in the daemon that could cause it to ignore
1431 SIGCHLD signals. This is not a major problem, because they are used only to
1432 wake it up if nothing else does.
1433
62c0818f
PH
143426. A malformed maildirsize file could cause Exim to calculate negative values
1435 for the mailbox size or file count. Odd effects could occur as a result.
1436 The maildirsize information is now recalculated if the size or filecount
1437 end up negative.
1438
26034054
PH
143927. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1440 support for a long time. Removed HAVE_SYS_VFS_H.
1441
af66f652
PH
144228. Installed the latest version of exipick from John Jetmore.
1443
90af77f4
PH
144429. In an address list, if the pattern was not a regular expression, an empty
1445 subject address (from a bounce message) matched only if the pattern was an
1446 empty string. Non-empty patterns were not even tested. This was the wrong
1447 because it is perfectly reasonable to use an empty address as part of a
1448 database query. An empty address is now tested by patterns that are
1449 lookups. However, all the other forms of pattern expect the subject to
1450 contain a local part and a domain, and therefore, for them, an empty
1451 address still always fails if the pattern is not itself empty.
1452
d8ef3577
PH
145330. Exim went into a mad DNS loop when attempting to do a callout where the
1454 host was specified on an smtp transport, and looking it up yielded more
1455 than one IP address.
1456
5cb8cbc6
PH
145731. Re-factored the code for checking spool and log partition space into a
1458 function that finds that data and another that does the check. The former
1459 is then used to implement four new variables: $spool_space, $log_space,
1460 $spool_inodes, and $log_inodes.
1461
14702f5b
PH
146232. The RFC2047 encoding function was originally intended for short strings
1463 such as real names; it was not keeping to the 75-character limit for
1464 encoded words that the RFC imposes. It now respects the limit, and
1465 generates multiple encoded words if necessary. To be on the safe side, I
1466 have increased the buffer size for the ${rfc2047: expansion operator from
1467 1024 to 2048 bytes.
1468
063b1e99
PH
146933. It is now permitted to omit both strings after an "if" condition; if the
1470 condition is true, the result is "true". As before, when the second string
1471 is omitted, a false condition yields an empty string. This makes it less
1472 cumbersome to write custom ACL and router conditions.
1473
652e1b65
PH
147434. Failure to deliver a bounce message always caused it to be frozen, even if
1475 there was an errors_to setting on the router. The errors_to setting is now
1476 respected.
1477
6f0c9a4f
PH
147835. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1479 canonical form (fully expanded) before being placed in
1480 $sender_host_address.
1481
33397d19
PH
148236. The table in the code that translates DNS record types into text (T_A to
1483 "A" for instance) was missing entries for NS and CNAME. It is just possible
1484 that this could have caused confusion if both these types were looked up
1485 for the same domain, because the text type is used as part of Exim's
1486 per-process caching. But the chance of anyone hitting this buglet seems
1487 very small.
1488
7bb56e1f
PH
148937. The dnsdb lookup has been extended in a number of ways.
1490
1491 (1) There is a new type, "zns", which walks up the domain tree until it
1492 finds some nameserver records. It should be used with care.
1493
ea3bc19b
PH
1494 (2) There is a new type, "mxh", which is like "mx" except that it returns
1495 just the host names, not the priorities.
1496
1497 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1498 looked up. The behaviour when one of the lookups defers can be
1499 controlled by a keyword.
7bb56e1f 1500
ea3bc19b 1501 (4) It is now possible to specify the separator character for use when
7bb56e1f 1502 multiple records are returned.
33397d19 1503
0bcb2a0e
PH
150438. The dnslists ACL condition has been extended: it is now possible to supply
1505 a list of IP addresses and/or domains to be looked up in a particular DNS
1506 domain.
1507
2ac0e484
PH
150839. Added log_selector=+queue_time_overall.
1509
4e1fde53
PH
151040. When running the queue in the test harness, wait just a tad after forking a
1511 delivery process, to get repeatability of debugging output.
1512
de365ded
PH
151341. Include certificate and key file names in error message when GnuTLS fails
1514 to set them up, because the GnuTLS error message doesn't include the name
1515 of the failing file when there is a problem reading it.
1516
f05da2e8
PH
151742. Allow both -bf and -bF in the same test run.
1518
d6453af2
PH
151943. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1520
f7b63901
PH
152144. The "Exiscan patch" is now merged into the mainline Exim source.
1522
152345. Sometimes the final signoff response after QUIT could fail to get
1524 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1525 < 0 before doing a fflush(). This bug looks as though it goes back to the
1526 introduction of TLS in release 3.20, but "sometimes" must have been rare
1527 because the tests only now provoked it.
1528
a444213a
PH
152946. Reset the locale to "C" after calling embedded Perl, in case it was changed
1530 (this can affect the format of dates).
1531
0ec020ea
PH
153247. exim_tidydb, when checking for the continued existence of a message for
1533 which it has found a message-specific retry record, was not finding
1534 messages that were in split spool directories. Consequently, it was
1535 deleting retry records that should have stayed in existence.
1536
b1206957
PH
153748. Steve fixed some bugs in eximstats.
1538
153949. The SPA authentication driver was not abandoning authentication and moving
1540 on to the next authenticator when an expansion was forced to fail,
1541 contradicting the general specification for all authenticators. Instead it
1542 was generating a temporary error. It now behaves as specified.
1543
26dd5a95
PH
154450. The default ordering of permitted cipher suites for GnuTLS was pessimal
1545 (the order specifies the preference for clients). The order is now AES256,
1546 AES128, 3DES, ARCFOUR128.
1547
343b2385
PH
154851. Small patch to Sieve code - explicitly set From: when generating an
1549 autoreply.
1550
1c5466b9
PH
155152. Exim crashed if a remote delivery caused a very long error message to be
1552 recorded - for instance if somebody sent an entire SpamAssassin report back
1553 as a large number of 550 error lines. This bug was coincidentally fixed by
1554 increasing the size of one of Exim's internal buffers (big_buffer) that
1555 happened as part of the Exiscan merge. However, to be on the safe side, I
1556 have made the code more robust (and fixed the comments that describe what
1557 is going on).
1558
55ee9ee3
PH
155953. Now that there can be additional text after "Completed" in log lines (if
1560 the queue_time_overall log selector is set), a one-byte patch to exigrep
1561 was needed to allow it to recognize "Completed" as not the last thing in
1562 the line.
1563
d38f8232
PH
156454. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1565 patch that reportedly fixes this has been added. I am not expert enough to
1566 create a test for it. This is what the patch creator wrote:
1567
1568 "I found a little strange behaviour of ldap code when working with
1569 Windows 2003 AD Domain, where users was placed in more than one
1570 Organization Units. When I tried to give exim partial DN, the exit code
1571 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1572 But simultaneously result of request was absolutely normal ldap result,
1573 so I produce this patch..."
1574
3295e65b
PH
1575 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1576 REFERENCE, so I have modified the code to exclude the patch when that macro
1577 is not defined.
1578
7102e136
PH
157955. Some experimental protocols are using DNS PTR records for new purposes. The
1580 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1581 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1582 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1583 CAN-2005-0021
7102e136 1584
3ca0ba97
PH
158556. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1586
c2bcbe20
PH
158757. Double the size of the debug message buffer (to 2048) so that more of very
1588 long debug lines gets shown.
1589
18ce445d
PH
159058. The exicyclog utility now does better if the number of log files to keep
1591 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1592
1f5b4c3d
PH
159359. Two changes related to the smtp_active_hostname option:
1594
1595 (1) $smtp_active_hostname is now available as a variable.
1596 (2) The default for smtp_banner uses $smtp_active_hostname instead
1597 of $primary_hostname.
1598
b975ba52
PH
159960. The host_aton() function is supposed to be passed a string that is known
1600 to be a valid IP address. However, in the case of IPv6 addresses, it was
1601 not checking this. This is a hostage to fortune. Exim now panics and dies
1602 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1603 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1604 components; fortuitously, this particular loophole had already been fixed
1605 by change 4.50/55 above.
1606
1607 If there are any other similar loopholes, the new check in host_aton()
1608 itself should stop them being exploited. The report I received stated that
1609 data on the command line could provoke the exploit when Exim was running as
1610 exim, but did not say which command line option was involved. All I could
1611 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1612 running as the user.
ea3a6f44 1613 CAN-2005-0021
85b87bc2
PH
1614
161561. There was a buffer overflow vulnerability in the SPA authentication code
1616 (which came originally from the Samba project). I have added a test to the
1617 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1618 CAN-2005-0022
b975ba52 1619
17ffcae7
PH
162062. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1621 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1622
d95f9fdb
PH
162363. The daemon start-up calls getloadavg() while still root for those OS that
1624 need the first call to be done as root, but it missed one case: when
1625 deliver_queue_load_max is set with deliver_drop_privilege. This is
1626 necessary for the benefit of the queue runner, because there is no re-exec
1627 when deliver_drop_privilege is set.
1628
86b8287f
PH
162964. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1630 This has been fixed.
1631
60dc5e56
PH
163265. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1633 was in use, was not putting the data itself into the right store pool;
1634 consequently, it could be overwritten for a subsequent message in the same
1635 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1636 the caching.)
1637
533244af
PH
163866. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1639
a5a28604
PH
164067. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1641 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1642 the function were treating the return as a boolean value, which happened to
1643 work because 0=false and not-0=true, but is not correct code.
1644
7e634d24
PH
164568. The host_aton() function was not handling scoped IPv6 addresses (those
1646 with, for example, "%eth0" on the end) correctly.
1647
3e11c26b
PH
164869. Fixed some compiler warnings in acl.c for the bitmaps specified with
1649 negated items (that is, ~something) in unsigned ints. Some compilers
1650 apparently mutter when there is no cast.
1651
6729cf78
PH
165270. If an address verification called from an ACL failed, and did not produce a
1653 user-specific message (i.e. there was only a "system" message), nothing was
1654 put in $acl_verify_message. In this situation, it now puts the system
1655 message there.
1656
00f00ca5
PH
165771. Change 4.23/11 added synchronization checking at the start of an SMTP
1658 session; change 4.31/43 added the unwanted input to the log line - except
1659 that it did not do this in the start of session case. It now does.
1660
c9bdd01c
PH
166172. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1662 This is wrong and can cause the other end to generate a synchronization
1663 error if it is another Exim or anything else that does the synchronization
1664 check. A QUIT command is no longer sent after a timeout.
1665
d43194df
PH
166673. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1667 during host lookups.
1668
fe5b5d0b
PH
166974. The defer_ok option of callout verification was not working if it was used
1670 when verifying addresses in header lines, that is, for this case:
1671
1672 verify = header_sender/callout=defer_ok
1673
76a2d7ba
PH
167475. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1675 those file descriptors could be used for SMTP connections. If anything
1676 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1677 could be sent to the SMTP client, causing chaos. The daemon now opens
1678 stdin, stdout, and stderr to /dev/null when it puts itself into the
1679 background.
1680
168176. Arrange for output from Perl's "warn" command to be written to Exim's main
1682 log by default. The user can override this with suitable Perl magic.
1683
04f7d5b9
PH
168477. The use of log_message on a "discard" ACL verb, which is supposed to add to
1685 the log message when discard triggers, was not working for the DATA ACL or
1686 for the non-SMTP ACL.
1687
bc60667e
PH
168878. Error message wording change in sieve.c.
1689
bb6e88ff
PH
169079. If smtp_accept_max_per_host was set, the number of connections could be
1691 restricted to fewer than expected, because the daemon was trying to set up
1692 a new connection before checking whether the processes handling previous
1693 connections had finished. The check for completed processes is now done
1694 earlier. On busy systems, this bug wouldn't be noticed because something
1695 else would have woken the daemon, and it would have reaped the completed
1696 process earlier.
1697
1e70f85b
PH
169880. If a message was submitted locally by a user whose login name contained one
1699 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1700 It caused a spool format error. I have fixed the spool reading code. A
1701 related problem was that the "from" clause in the Received: line became
1702 illegal because of the space(s). It is now covered by ${quote_local_part.
1703
170481. Included the latest eximstats from Steve (adds average sizes to HTML Top
1705 tables).
1706
4e01f9d6
PH
170782. Updated OS/Makefile-AIX as per message from Mike Meredith.
1708
1ee1cef2
PH
170983. Patch from Sieve maintainer to fix unterminated string problem in
1710 "vacation" handling.
1711
6e2b4ccc
PH
171284. Some minor changes to the Linux configuration files to help with other
1713 OS variants using glibc.
1714
8e669ac1
PH
171585. One more patch for Sieve to update vacation handling to latest spec.
1716
495ae4b0 1717
bbe902f0
PH
1718----------------------------------------------------
1719See the note above about the 4.44 and 4.50 releases.
1720----------------------------------------------------
1721
1722
1723Exim version 4.44
1724-----------------
1725
1726 1. Change 4.43/35 introduced a bug that caused file counts to be
1727 incorrectly computed when quota_filecount was set in an appendfile
1728 transport
1729
1730 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1731 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1732 place.
1733
1734 3. Give more explanation in the error message when the command for a transport
1735 filter fails to execute.
1736
1737 4. There are several places where Exim runs a non-Exim command in a
1738 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1739 was being done only for the command run by the queryprogram router. It is
1740 now done for all such subprocesses. The other cases are: ${run, transport
1741 filters, and the commands run by the lmtp and pipe transports.
1742
1743 5. Some older OS have a limit of 256 on the maximum number of file
1744 descriptors. Exim was using setrlimit() to set 1000 as a large value
1745 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1746 systems. I've change it so that if it can't get 1000, it tries for 256.
1747
1748 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1749 was an oversight, and furthermore, ever since the addition of extra
1750 controls (e.g. 4.43/32), the checks on when to allow different forms of
1751 "control" were broken. There should now be diagnostics for all cases when a
1752 control that does not make sense is encountered.
1753
1754 7. $recipients is now available in the predata ACL (oversight).
1755
1756 8. Tidy the search cache before the fork to do a delivery from a message
1757 received from the command line. Otherwise the child will trigger a lookup
1758 failure and thereby defer the delivery if it tries to use (for example) a
1759 cached ldap connection that the parent has called unbind on.
1760
1761 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1762 of $address_data from the recipient verification was clobbered by the
1763 sender verification.
1764
176510. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1766 was its contents. (It was OK if the option was not defined at all.)
1767
176811. A "Completed" log line is now written for messages that are removed from
1769 the spool by the -Mrm option.
1770
177112. $host_address is now set to the target address during the checking of
1772 ignore_target_hosts.
1773
177413. When checking ignore_target_hosts for an ipliteral router, no host name was
1775 being passed; this would have caused $sender_host_name to have been used if
1776 matching the list had actually called for a host name (not very likely,
1777 since this list is usually IP addresses). A host name is now passed as
1778 "[x.x.x.x]".
1779
178014. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1781 code that specifies a non-restarting handler (typically sigaction() in
1782 modern systems) in an attempt to fix a rare and obscure crash bug.
1783
178415. Narrowed the window for a race in the daemon that could cause it to ignore
1785 SIGCHLD signals. This is not a major problem, because they are used only to
1786 wake it up if nothing else does.
1787
178816. A malformed maildirsize file could cause Exim to calculate negative values
1789 for the mailbox size or file count. Odd effects could occur as a result.
1790 The maildirsize information is now recalculated if the size or filecount
1791 end up negative.
1792
179317. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1794 support for a long time. Removed HAVE_SYS_VFS_H.
1795
ea3a6f44 179618. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1797
179819. Allow an empty sender to be matched against a lookup in an address list.
1799 Previously the only cases considered were a regular expression, or an
1800 empty pattern.
1801
180220. Exim went into a mad DNS lookup loop when doing a callout where the
1803 host was specified on the transport, if the DNS lookup yielded more than
1804 one IP address.
1805
ea3a6f44
NM
180621. The RFC2047 encoding function was originally intended for short strings
1807 such as real names; it was not keeping to the 75-character limit for
1808 encoded words that the RFC imposes. It now respects the limit, and
1809 generates multiple encoded words if necessary. To be on the safe side, I
1810 have increased the buffer size for the ${rfc2047: expansion operator from
1811 1024 to 2048 bytes.
bbe902f0 1812
ea3a6f44
NM
181322. Failure to deliver a bounce message always caused it to be frozen, even if
1814 there was an errors_to setting on the router. The errors_to setting is now
1815 respected.
bbe902f0
PH
1816
181723. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1818 canonical form (fully expanded) before being placed in
1819 $sender_host_address.
1820
182124. Updated eximstats to version 1.33
1822
ea3a6f44
NM
182325. Include certificate and key file names in error message when GnuTLS fails
1824 to set them up, because the GnuTLS error message doesn't include the name
1825 of the failing file when there is a problem reading it.
bbe902f0
PH
1826
182726. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1828 As per change 25.
bbe902f0 1829
ea3a6f44
NM
183027. Reset the locale to "C" after calling embedded Perl, in case it was changed
1831 (this can affect the format of dates).
bbe902f0 1832
ea3a6f44
NM
183328. exim_tidydb, when checking for the continued existence of a message for
1834 which it has found a message-specific retry record, was not finding
1835 messages that were in split spool directories. Consequently, it was
1836 deleting retry records that should have stayed in existence.
bbe902f0
PH
1837
183829. eximstats updated to version 1.35
1839 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1840 1.35 - bugfix such that pie charts by volume are generated correctly
1841
ea3a6f44
NM
184230. The SPA authentication driver was not abandoning authentication and moving
1843 on to the next authenticator when an expansion was forced to fail,
1844 contradicting the general specification for all authenticators. Instead it
1845 was generating a temporary error. It now behaves as specified.
bbe902f0 1846
ea3a6f44
NM
184731. The default ordering of permitted cipher suites for GnuTLS was pessimal
1848 (the order specifies the preference for clients). The order is now AES256,
1849 AES128, 3DES, ARCFOUR128.
bbe902f0 1850
ea3a6f44
NM
185131. Small patch to Sieve code - explicitly set From: when generating an
1852 autoreply.
bbe902f0 1853
ea3a6f44
NM
185432. Exim crashed if a remote delivery caused a very long error message to be
1855 recorded - for instance if somebody sent an entire SpamAssassin report back
1856 as a large number of 550 error lines. This bug was coincidentally fixed by
1857 increasing the size of one of Exim's internal buffers (big_buffer) that
1858 happened as part of the Exiscan merge. However, to be on the safe side, I
1859 have made the code more robust (and fixed the comments that describe what
1860 is going on).
bbe902f0 1861
ea3a6f44
NM
186233. Some experimental protocols are using DNS PTR records for new purposes. The
1863 keys for these records are domain names, not reversed IP addresses. The
1864 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1865 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1866 CAN-2005-0021
1867
ea3a6f44
NM
186834. The host_aton() function is supposed to be passed a string that is known
1869 to be a valid IP address. However, in the case of IPv6 addresses, it was
1870 not checking this. This is a hostage to fortune. Exim now panics and dies
1871 if the condition is not met. A case was found where this could be provoked
1872 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1873 components; fortuitously, this particular loophole had already been fixed
1874 by change 4.50/55 or 4.44/33 above.
1875
1876 If there are any other similar loopholes, the new check in host_aton()
1877 itself should stop them being exploited. The report I received stated that
1878 data on the command line could provoke the exploit when Exim was running as
1879 exim, but did not say which command line option was involved. All I could
1880 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1881 running as the user.
bbe902f0
PH
1882 CAN-2005-0021
1883
ea3a6f44
NM
188435. There was a buffer overflow vulnerability in the SPA authentication code
1885 (which came originally from the Samba project). I have added a test to the
1886 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1887 CAN-2005-0022
1888
ea3a6f44
NM
188936. The daemon start-up calls getloadavg() while still root for those OS that
1890 need the first call to be done as root, but it missed one case: when
1891 deliver_queue_load_max is set with deliver_drop_privilege. This is
1892 necessary for the benefit of the queue runner, because there is no re-exec
1893 when deliver_drop_privilege is set.
bbe902f0 1894
ea3a6f44
NM
189537. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1896 was in use, was not putting the data itself into the right store pool;
1897 consequently, it could be overwritten for a subsequent message in the same
1898 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1899 the caching.)
bbe902f0 1900
ea3a6f44
NM
190138. Sometimes the final signoff response after QUIT could fail to get
1902 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1903 < 0 before doing a fflush(). This bug looks as though it goes back to the
1904 introduction of TLS in release 3.20, but "sometimes" must have been rare
1905 because the tests only now provoked it.
bbe902f0
PH
1906
1907
495ae4b0
PH
1908Exim version 4.43
1909-----------------
1910
1911 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1912 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1913 Now it returns an integer. A number of calls were still expecting a T/F
1914 return. Fortuitously, in all cases, the tests worked in OK situations,
1915 which is the norm. However, things would have gone wrong on any write
1916 failures on the smtp file descriptor. This function is used when sending
1917 messages over SMTP and also when doing verify callouts.
1918
1919 2. When Exim is called to do synchronous delivery of a locally submitted
1920 message (the -odf or -odi options), it no longer closes stderr before doing
1921 the delivery.
1922
1923 3. Implemented the mua_wrapper option.
1924
1925 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1926
1927 5. Implemented the functions header_remove(), header_testname(),
1928 header_add_at_position(), and receive_remove_recipient(), and exported them
1929 to local_scan().
1930
1931 6. If an ACL "warn" statement specified the addition of headers, Exim already
1932 inserted X-ACL-Warn: at the start if there was no header name. However, it
1933 was not making this test for the second and subsequent header lines if
1934 there were newlines in the string. This meant that an invalid header could
1935 be inserted if Exim was badly configured.
1936
1937 7. Allow an ACL "warn" statement to add header lines at the start or after all
1938 the Received: headers, as well as at the end.
1939
1940 8. Added the rcpt_4xx retry error code.
1941
1942 9. Added postmaster_mailfrom=xxx to callout verification option.
1943
194410. Added mailfrom=xxxx to the callout verification option, for verify=
1945 header_sender only.
1946
194711. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1948 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1949
195012. Inserted some casts to stop certain compilers warning when using pointer
1951 differences as field lengths or precisions in printf-type calls (mostly
1952 affecting debugging statements).
1953
195413. Added optional readline() support for -be (dynamically loaded).
1955
195614. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1957 same clock tick as a message's arrival, so that its received time was the
1958 same as the "first fail" time on the retry record, and that message
1959 remained on the queue past the ultimate address timeout, every queue runner
1960 would try a delivery (because it was past the ultimate address timeout) but
1961 after another failure, the ultimate address timeout, which should have then
1962 bounced the address, did not kick in. This was a "< instead of <=" error;
1963 in most cases the first failure would have been in the next clock tick
1964 after the received time, and all would be well.
1965
196615. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1967 being recognized when the domain list was tested by the match_domain
1968 condition in an expansion string.
1969
197016. Added the ${str2b64: operator.
1971
197217. Exim was always calling setrlimit() to set a large limit for the number of
1973 processes, without checking whether the existing limit was already
1974 adequate. (It did check for the limit on file descriptors.) Furthermore,
1975 errors from getrlimit() and setrlimit() were being ignored. Now they are
1976 logged to the main and panic logs, but Exim does carry on, to try to do its
1977 job under whatever limits there are.
1978
197918. Imported PCRE 5.0.
1980
198119. Trivial typo in log message " temporarily refused connection" (the leading
1982 space).
1983
198420. If the log selector return_path_on_delivery was set and an address was
1985 redirected to /dev/null, the delivery process crashed because it assumed
1986 that a return path would always be set for a "successful" delivery. In this
1987 case, the whole delivery is bypassed as an optimization, and therefore no
1988 return path is set.
1989
199021. Internal re-arrangement: the function for sending a challenge and reading
1991 a response while authentication was assuming a zero-terminated challenge
1992 string. It's now changed to take a pointer and a length, to allow for
1993 binary data in such strings.
1994
199522. Added the cyrus_sasl authenticator (code supplied by MBM).
1996
199723. Exim was not respecting finduser_retries when seeking the login of the
1998 uid under which it was called; it was always trying 10 times. (The default
1999 setting of finduser_retries is zero.) Also, it was sleeping after the final
2000 failure, which is pointless.
2001
200224. Implemented tls_on_connect_ports.
2003
200425. Implemented acl_smtp_predata.
2005
200626. If the domain in control=submission is set empty, Exim assumes that the
2007 authenticated id is a complete email address when it generates From: or
2008 Sender: header lines.
2009
201027. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2011 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2012 chown and chgrp in /bin and hostname in /usr/bin.
2013
201428. Exim was keeping the "process log" file open after each use, just as it
2015 does for the main log. This opens the possibility of it remaining open for
2016 long periods when the USR1 signal hits a daemon. Occasional processlog
2017 errors were reported, that could have been caused by this. Anyway, it seems
2018 much more sensible not to leave this file open at all, so that is what now
2019 happens.
2020
202129. The long-running daemon process does not normally write to the log once it
2022 has entered its main loop, and it closes the log before doing so. This is
2023 so that log files can straightforwardly be renamed and moved. However,
2024 there are a couple of unusual error situations where the daemon does write
2025 log entries, and I had neglected to close the log afterwards.
2026
202730. The text of an SMTP error response that was received during a remote
2028 delivery was being truncated at 512 bytes. This is too short for some of
2029 the long messages that one sometimes sees. I've increased the limit to
2030 1024.
2031
203231. It is now possible to make retry rules that apply only when a message has a
2033 specific sender, in particular, an empty sender.
2034
203532. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2036 it possible to be selective about when SMTP synchronization is enforced.
2037
203833. Added "control = caseful_local_part" and "control = "caselower_local_part".
2039
204032. Implemented hosts_connection_nolog.
2041
204233. Added an ACL for QUIT.
2043
204434. Setting "delay_warning=" to disable warnings was not working; it gave a
2045 syntax error.
2046
204735. Added mailbox_size and mailbox_filecount to appendfile.
2048
204936. Added control = no_multiline_responses to ACLs.
2050
205137. There was a bug in the logic of the code that waits for the clock to tick
2052 in the case where the clock went backwards by a substantial amount such
2053 that the microsecond fraction of "now" was more than the microsecond
2054 fraction of "then" (but the whole seconds number was less).
2055
205638. Added support for the libradius Radius client library this is found on
2057 FreeBSD (previously only the radiusclient library was supported).
2058
2059
2060Exim version 4.42
2061-----------------
2062
2063 1. When certain lookups returned multiple values in the form name=value, the
2064 quoting of the values was not always being done properly. Specifically:
2065 (a) If the value started with a double quote, but contained no whitespace,
2066 it was not quoted.
2067 (b) If the value contained whitespace other than a space character (i.e.
2068 tabs or newlines or carriage returns) it was not quoted.
2069 This fix has been applied to the mysql and pgsql lookups by writing a
2070 separate quoting function and calling it from the lookup code. The fix
2071 should probably also be applied to nisplus, ibase and oracle lookups, but
2072 since I cannot test any of those, I have not disturbed their existing code.
2073
2074 2. A hit in the callout cache for a specific address caused a log line with no
2075 reason for rejecting RCPT. Now it says "Previous (cached) callout
2076 verification failure".
2077
2078 3. There was an off-by-one bug in the queryprogram router. An over-long
2079 return line was truncated at 256 instead of 255 characters, thereby
2080 overflowing its buffer with the terminating zero. As well as fixing this, I
2081 have increased the buffer size to 1024 (and made a note to document this).
2082
2083 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2084 when Exim is waiting for an SMTP response from a remote server, Exim
2085 restarts its select() call on the socket, thereby resetting its timeout.
2086 This is not a problem when such interrupts are rare. Somebody set up a cron
2087 job to run exiwhat every 2 minutes, which is less than the normal select()
2088 timeout (5 or 10 minutes). This meant that the select() timeout never
2089 kicked in because it was always reset. I have fixed this by comparing the
2090 time when an interrupt arrives with the time at the start of the first call
2091 to select(). If more time than the timeout has elapsed, the interrupt is
2092 treated as a timeout.
2093
2094 5. Some internal re-factoring in preparation for the addition of Sieve
2095 extensions (by MH). In particular, the "personal" test is moved to a
2096 separate function, and given an option for scanning Cc: and Bcc: (which is
2097 not set for Exim filters).
2098
2099 6. When Exim created an email address using the login of the caller as the
2100 local part (e.g. when creating a From: or Sender: header line), it was not
2101 quoting the local part when it contained special characters such as @.
2102
2103 7. Installed new OpenBSD configuration files.
2104
2105 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2106 try to make them clearer.
2107
2108 9. Callout options, other than the timeout value, were being ignored when
2109 verifying sender addresses in header lines. For example, when using
2110
2111 verify = header_sender/callout=no_cache
2112
2113 the cache was (incorrectly) being used.
2114
211510. Added a missing instance of ${EXE} to the exim_install script; this affects
2116 only the Cygwin environment.
2117
211811. When return_path_on_delivery was set as a log selector, if different remote
2119 addresses in the same message used different return paths and parallel
2120 remote delivery occurred, the wrong values would sometimes be logged.
2121 (Whenever a remote delivery process finished, the return path value from
2122 the most recently started remote delivery process was logged.)
2123
212412. RFC 3848 specifies standard names for the "with" phrase in Received: header
2125 lines when AUTH and/or TLS are in use. This is the "received protocol"
2126 field. Exim used to use "asmtp" for authenticated SMTP, without any
2127 indication (in the protocol name) for TLS use. Now it follows the RFC and
2128 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2129 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2130 names appear in log lines as well as in Received: header lines.
2131
213213. Installed MH's patches for Sieve to add the "copy" and "vacation"
2133 extensions, and comparison tests, and to fix some bugs.
2134
213514. Changes to the "personal" filter test:
2136
2137 (1) The test was buggy in that it was just doing the equivalent of
2138 "contains" tests on header lines. For example, if a user's address was
2139 anne@some.where, the "personal" test would incorrectly be true for
2140
2141 To: susanne@some.where
2142
2143 This test is now done by extracting each address from the header in turn,
2144 and checking the entire address. Other tests that are part of "personal"
2145 are now done using regular expressions (for example, to check local parts
2146 of addresses in From: header lines).
2147
2148 (2) The list of non-personal local parts in From: addresses has been
2149 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2150 taken from the Sieve specification recommendations.
2151
2152 (3) If the message contains any header line starting with "List-" it is
2153 treated as non-personal.
2154
2155 (4) The test for "circular" in the Subject: header line has been removed
2156 because it now seems ill-conceived.
2157
215815. Minor typos in src/EDITME comments corrected.
2159
216016. Installed latest exipick from John Jetmore.
2161
216217. If headers_add on a router specified a text string that was too long for
2163 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2164 of string_sprintf() is now avoided.
2165
216618. $message_body_size was not set (it was always zero) when running the DATA
2167 ACL and the local_scan() function.
2168
216919. For the "mail" command in an Exim filter, no default was being set for
2170 the once_repeat time, causing a random time value to be used if "once" was
2171 specified. (If the value happened to be <= 0, no repeat happened.) The
2172 default is now 0s, meaning "never repeat". The "vacation" command was OK
2173 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2174 (I found it when inspecting the code).
2175
217620. There is now an overall timeout for performing a callout verification. It
2177 defaults to 4 times the callout timeout, which applies to individual SMTP
2178 commands during the callout. The overall timeout applies when there is more
2179 than one host that can be tried. The timeout is checked before trying the
2180 next host. This prevents very long delays if there are a large number of
2181 hosts and all are timing out (e.g. when the network connections are timing
2182 out). The value of the overall timeout can be changed by specifying an
2183 additional sub-option for "callout", called "maxwait". For example:
2184
2185 verify = sender/callout=5s,maxwait=20s
2186
218721. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2188 to the end before writing, but this should make it even safer).
2189
219022. Exim was forgetting that it had advertised PIPELINING for the second and
2191 subsequent messages on an SMTP connection. It was also not resetting its
2192 memory on STARTTLS and an internal HELO.
2193
219423. When Exim logs an SMTP synchronization error within a session, it now
2195 records whether PIPELINING has been advertised or not.
2196
219724. Added 3 instances of "(long int)" casts to time_t variables that were being
2198 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2199 rather than long int.
2200
220125. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2202
220326. Added the never_mail option to autoreply.
2204
2205
2206Exim version 4.41
2207-----------------
2208
2209 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2210 crash if the getsockname() call failed; this can happen if a connection is
2211 closed very soon after it is established. The problem was simply in the
2212 order in which certain operations were done, causing Exim to try to write
2213 to the SMTP stream before it had set up the file descriptor. The bug has
2214 been fixed by making things happen in the correct order.
2215
2216
2217Exim version 4.40
2218-----------------
2219
2220 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2221 before the connection was closed, thus losing the rejection response.
2222
2223 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2224 some early Solaris releases, but causes trouble in current releases where
2225 socklen_t is defined.
2226
2227 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2228 always exist.
2229
2230 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2231 configured.
2232
2233 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2234 that releasing the top of it at the end releases what was used for sub-
2235 expansions (unless the block got too big). However, discard this block if
2236 the first thing is a variable or header, so that we can use its block when
2237 it is dynamic (useful for very large $message_headers, for example).
2238
2239 6. Lookups now cache *every* query, not just the most recent. A new, separate
2240 store pool is used for this. It can be recovered when all lookup caches are
2241 flushed. Lookups now release memory at the end of their result strings.
2242 This has involved some general refactoring of the lookup sources.
2243
2244 7. Some code has been added to the store_xxx() functions to reduce the amount
2245 of flapping under certain conditions.
2246
2247 8. log_incoming_interface used to affect only the <= reception log lines. Now
2248 it causes the local interface and port to be added to several more SMTP log
2249 lines, for example "SMTP connection from", and rejection lines.
2250
2251 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2252
225310. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2254
225511. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2256 could be overwritten at the end of the current message (or the start of a
2257 new message if it was set in a HELO ACL). The value is now preserved for
2258 the duration of the SMTP connection.
2259
226012. If a transport had a headers_rewrite setting, and a matching header line
2261 contained an unqualified address, that address was qualified, even if it
2262 did not match any rewriting rules. The underlying bug was that the values
2263 of the flags that permit the existence of unqualified sender and recipient
2264 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2265 non-local messages, and by -bnq for local messages) were not being
2266 preserved with the message after it was received.
2267
226813. When Exim was logging an SMTP synchronization error, it could sometimes log
2269 "next input=" as part of the text comprising the host identity instead of
2270 the correct text. The code was using the same buffer for two different
2271 strings. However, depending on which order the printing function evaluated
2272 its arguments, the bug did not always show up. Under Linux, for example, my
2273 test suite worked just fine.
2274
227514. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2276 doesn't work with some older versions of Perl. It has been changed to "my",
2277 which in any case is probably the better facility to use.
2278
227915. A really picky compiler found some instances of statements for creating
2280 error messages that either had too many or two few arguments for the format
2281 string.
2282
228316. The size of the buffer for calls to the DNS resolver has been increased
2284 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2285 for addresses that have a lot of PTR records. This alleviates a problem; it
2286 does not fully solve it.
2287
228817. A dnsdb lookup for PTR records that receives more data than will fit in the
2289 buffer now truncates the list and logs the incident, which is the same
2290 action as happens when Exim is looking up a host name and its aliases.
2291 Previously in this situation something unpredictable would happen;
2292 sometimes it was "internal error: store_reset failed".
2293
229418. If a server dropped the connection unexpectedly when an Exim client was
2295 using GnuTLS and trying to read a response, the client delivery process
2296 crashed while trying to generate an error log message.
2297
229819. If a "warn" verb in an ACL added multiple headers to a message in a single
2299 string, for example:
2300
2301 warn message = H1: something\nH2: something
2302
2303 the text was added as a single header line from Exim's point of view
2304 though it ended up OK in the delivered message. However, searching for the
2305 second and subsequent header lines using $h_h2: did not work. This has been
2306 fixed. Similarly, if a system filter added multiple headers in this way,
2307 the routers could not see them.
2308
230920. Expanded the error message when iplsearch is called with an invalid key to
2310 suggest using net-iplsearch in a host list.
2311
231221. When running tests using -bh, any delays imposed by "delay" modifiers in
2313 ACLs are no longer actually imposed (and a message to that effect is
2314 output).
2315
231622. If a "gecos" field in a passwd entry contained escaped characters, in
2317 particular, if it contained a \" sequence, Exim got it wrong when building
2318 a From: or a Sender: header from that name. A second bug also caused
2319 incorrect handling when an unquoted " was present following a character
2320 that needed quoting.
2321
232223. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2323 was not being matched caselessly.
2324
232524. Arranged for all hyphens in the exim.8 source to be escaped with
2326 backslashes.
2327
232825. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2329 properly. Recipient callout cache records were still being keyed to include
2330 the sender, even when use_sender was set false. This led to far more
2331 callouts that were necessary. The sender is no longer included in the key
2332 when use_sender is false.
2333
233426. Added "control = submission" modifier to ACLs.
2335
233627. Added the ${base62d: operator to decode base 62 numbers.
2337
233828. dnsdb lookups can now access SRV records.
2339
234029. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2341 the configuration file.
2342
234330. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2344 (-v) mode. This makes the output for a verbose queue run more intelligible.
2345
234631. Added a use_postmaster feature to recipient callouts.
2347
234832. Added the $body_zerocount variable, containing the number of binary zero
2349 bytes in the message body.
2350
235133. The time of last modification of the "new" subdirectory is now used as the
2352 "mailbox time last read" when there is a quota error for a maildir
2353 delivery.
2354
235534. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2356
235735. Added +ignore_unknown as a special item in host lists.
2358
235936. Code for decoding IPv6 addresses in host lists is now included, even if
2360 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2361 address was recognized as an IP address, but was then not correctly decoded
2362 into binary, causing unexpected and incorrect effects when compared with
2363 another IP address.
2364
2365
2366Exim version 4.34
2367-----------------
2368
2369 1. Very minor rewording of debugging text in manualroute to say "list of
2370 hosts" instead of "hostlist".
2371
2372 2. If verify=header_syntax was set, and a header line with an unqualified
2373 address (no domain) and a large number of spaces between the end of the
2374 name and the colon was received, the reception process suffered a buffer
2375 overflow, and (when I tested it) crashed. This was caused by some obsolete
2376 code that should have been removed. The fix is to remove it!
2377
2378 3. When running in the test harness, delay a bit after writing a bounce
2379 message to get a bit more predictability in the log output.
2380
2381 4. Added a call to search_tidyup() just before forking a reception process. In
2382 theory, someone could use a lookup in the expansion of smtp_accept_max_
2383 per_host which, without the tidyup, could leave open a database connection.
2384
2385 5. Added the variables $recipient_data and $sender_data which get set from a
2386 lookup success in an ACL "recipients" or "senders" condition, or a router
2387 "senders" option, similar to $domain_data and $local_part_data.
2388
2389 6. Moved the writing of debug_print from before to after the "senders" test
2390 for routers.
2391
2392 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2393 problems for message scanning, either using a data ACL, or using
2394 local_scan() because the Received: header was not generated till after they
2395 were called (in order to set the time as the time of reception completion).
2396 I have revised the way this works. The header is now generated after the
2397 body is received, but before the ACL or local_scan() are called. After they
2398 are run, the timestamp in the header is updated.
2399
2400
2401Exim version 4.33
2402-----------------
2403
2404 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2405 before starting a queue runner without re-exec. This happened only when
2406 deliver_drop_privilege was set or when the Exim user was set to root. The
2407 effect of the bug was that timeouts during subsequent deliveries caused
2408 crashes instead of being properly handled. The handler is now left at its
2409 default (and expected) setting.
2410
2411 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2412 message, again when deliver_drop_privilege is set or Exim is run as root.
2413 The bug described in (1) was not present in this case, but the tidying up
2414 of the other signals was missing. I have made the two cases consistent.
2415
2416 3. The ignore_target_hosts setting on a manualroute router was being ignored
2417 for hosts that were looked up using the /MX notation.
2418
2419 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2420 in domain lists.
2421
2422 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2423 operated on the sender address. After changing the $sender_address to <>
2424 for the sender address verify, Exim was re-instated it as the original
2425 (before rewriting) address, but remembering that it had rewritten it, so it
2426 wasn't rewriting it again. This bug also had the effect of breaking the
2427 sender address verification caching when the sender address was rewritten.
2428
2429 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2430 This has been changed so that if the ip literal address matches
2431 ignore_target_hosts, the router declines.
2432
2433 7. Added expansion conditions match_domain, match_address, and match_local_
2434 part (NOT match_host).
2435
2436 8. The placeholder for the Received: header didn't have a length field set.
2437
2438 9. Added code to Exim itself and to exim_lock to test for a specific race
2439 condition that could lead to file corruption when using MBX delivery. The
2440 issue is with the lockfile that is created in /tmp. If this file is removed
2441 after a process has opened it but before that process has acquired a lock,
2442 there is the potential for a second process to recreate the file and also
2443 acquire a lock. This could lead to two Exim processes writing to the file
2444 at the same time. The added code performs the same test as UW imapd; it
2445 checks after acquiring the lock that its file descriptor still refers to
2446 the same named file.
2447
244810. The buffer for building added header lines was of fixed size, 8192 bytes.
2449 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2450 when Exim is built.
2451
245211. Added the smtp_active_hostname option. If used, this will typically be made
2453 to depend on the incoming interface address. Because $interface_address is
2454 not set up until the daemon has forked a reception process, error responses
2455 that can happen earlier (such as "too many connections") no longer contain
2456 a host name.
2457
245812. If an expansion in a condition on a "warn" statement fails because a lookup
2459 defers, the "warn" statement is abandoned, and the next ACL statement is
2460 processed. Previously this caused the whole ACL to be aborted.
2461
246213. Added the iplsearch lookup type.
2463
246414. Added ident_timeout as a log selector.
2465
246615. Added tls_certificate_verified as a log selector.
2467
246816. Added a global option tls_require_ciphers (compare the smtp transport
2469 option of the same name). This controls incoming TLS connections.
2470
247117. I finally figured out how to make tls_require_ciphers do a similar thing
2472 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2473 before starting the TLS session.
2474
247518. Tabs are now shown as \t in -bP output.
2476
247719. If the log selector return_path_on_delivery was set, Exim crashed when
2478 bouncing a message because it had too many Received: header lines.
2479
248020. If two routers both had headers_remove settings, and the first one included
2481 a superfluous trailing colon, the final name in the first list and the
2482 first name in the second list were incorrectly joined into one item (with a
2483 colon in the middle).
2484
2485
2486Exim version 4.32
2487-----------------
2488
2489 1. Added -C and -D options to the exinext utility, mainly to make it easier
2490 to include in the automated testing, but these could be helpful when
2491 multiple configurations are in use.
2492
2493 2. The exinext utility was not formatting the output nicely when there was
2494 an alternate port involved in the retry record key, nor when there was a
2495 message id as well (for retries that were specific to a specific message
2496 and a specific host). It was also confused by IPv6 addresses, because of
2497 the additional colons they contain. I have fixed the IPv4 problem, and
2498 patched it up to do a reasonable job for IPv6.
2499
2500 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2501 delivery, the log line now contains "pipelined" if PIPELINING was used.
2502
2503 4. An SMTP transport process used to panic and die if the bind() call to set
2504 an explicit outgoing interface failed. This has been changed; it is now
2505 treated in the same way as a connect() failure.
2506
2507 5. A reference to $sender_host_name in the part of a conditional expansion
2508 that was being skipped was still causing a DNS lookup. This no longer
2509 occurs.
2510
2511 6. The def: expansion condition was not recognizing references to header lines
2512 that used bh_ and bheader_.
2513
2514 7. Added the _cache feature to named lists.
2515
2516 8. The code for checking quota_filecount in the appendfile transport was
2517 allowing one more file than it should have been.
2518
2519 9. For compatibility with Sendmail, the command line option
2520
2521 -prval:sval
2522
2523 is equivalent to
2524
2525 -oMr rval -oMs sval
2526
2527 and sets the incoming protocol and host name (for trusted callers). The
2528 host name and its colon can be omitted when only the protocol is to be set.
2529 Note the Exim already has two private options, -pd and -ps, that refer to
2530 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2531 "s", but I don't think that's a major issue.
2532
253310. A number of refactoring changes to the code, none of which should affect
2534 Exim's behaviour:
2535
2536 (a) The number of logging options was getting close to filling up the
2537 32-bit word that was used as a bit map. I have split them into two classes:
2538 those that are passed in the argument to log_write(), and those that are
2539 only ever tested independently outside of that function. These are now in
2540 separate 32-bit words, so there is plenty of room for expansion again.
2541 There is no change in the user interface or the logging behaviour.
2542
2543 (b) When building, for example, log lines, the code previously used a
2544 macro that called string_cat() twice, in order to add two strings. This is
2545 not really sufficiently general. Furthermore, there was one instance where
2546 it was actually wrong because one of the argument was used twice, and in
2547 one call a function was used. (As it happened, calling the function twice
2548 did not affect the overall behaviour.) The macro has been replaced by a
2549 function that can join an arbitrary number of extra strings onto a growing
2550 string.
2551
2552 (c) The code for expansion conditions now uses a table and a binary chop
2553 instead of a serial search (which was left over from when there were very
2554 few conditions). Also, it now recognizes conditions like "pam" even when
2555 the relevant support is not compiled in: a suitably worded error message is
2556 given if an attempt is made to use such a condition.
2557
255811. Added ${time_interval:xxxxx}.
2559
256012. A bug was causing one of the ddress fields not to be passed back correctly
2561 from remote delivery subprocesses. The field in question was not being
2562 subsequently used, so this caused to problems in practice.
2563
256413. Added new log selectors queue_time and deliver_time.
2565
256614. Might have fixed a bug in maildirsizefile handling that threw up
2567 "unexpected character" debug warnings, and recalculated the data
2568 unnecessarily. In any case, I expanded the warning message to give more
2569 information.
2570
257115. Added the message "Restricted characters in address" to the statements in
2572 the default ACL that block characters like @ and % in local parts.
2573
257416. Change 71 for release 4.31 proved to be much less benign that I imagined.
2575 Three changes have been made:
2576
2577 (a) There was a serious bug; a negative response to MAIL caused the whole
2578 recipient domain to be cached as invalid, thereby blocking all messages
2579 to all local parts at the same domain, from all senders. This bug has
2580 been fixed. The domain is no longer cached after a negative response to
2581 MAIL if the sender used is not empty.
2582
2583 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2584 been restored.
2585
2586 (c) A new callout option, "use_sender" has been added for people who want
2587 the modified behaviour.
2588
2589
2590Exim version 4.31
2591-----------------
2592
2593 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2594 Larry Rosenman.
2595
2596 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2597 indeed breaks things for older releases.
2598
2599 3. Added additional logging to the case where there is a problem reading data
2600 from a filter that is running in a subprocess using a pipe, in order to
2601 try to track down a specific problem.
2602
2603 4. Testing facility fudge: when running in the test harness and attempting
2604 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2605 getting "No route to host". Convert this to a timeout.
2606
2607 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2608 warning.
2609
2610 6. Some OS don't have socklen_t but use size_t instead. This affects the
2611 fifth argument of getsockopt() amongst other things. This is now
2612 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2613 can be set for individual OS. I have set it for SunOS5, OSF1, and
2614 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2615 some earlier ones do not.
2616
2617 7. Change 4.30/15 was not doing the test caselessly.
2618
2619 8. The standard form for an IPv6 address literal was being rejected by address
2620 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2621 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2622 this, as well as the form without the "IPv6" on the front (but only when
2623 address literals are enabled, of course).
2624
2625 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2626
262710. Exim crashed if a message with an empty sender address specified by -f
2628 encountered a router with an errors_to setting. This could be provoked only
2629 by a command such as
2630
2631 exim -f "" ...
2632
2633 where an empty string was supplied; "<>" did not hit this bug.
2634
263511. Installed PCRE release 4.5.
2636
263712. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2638 remained set. It is now erased.
2639
264013. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2641 times from message ids (which are base 36 rather than the normal 62).
2642
264314. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2644 were being counted as actual protocol errors, and logged if the log
2645 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2646 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2647 and DATA following a set of rejected RCPTs do not count as protocol errors.
2648 In other words, Exim assumes they were pipelined, though this may not
2649 actually be the case. Of course, in all cases the client gets an
2650 appropriate error code.
2651
265215. If a lookup fails in an ACL condition, a message about the failure may
2653 be available; it is used if testing the ACL cannot continue, because most
2654 such messages specify what the cause of the deferral is. However, some
2655 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2656 that caused an old message to be retained and used if a later statement
2657 caused a defer, replacing the real cause of the deferral.
2658
265916. If an IP address had so many PTR records that the DNS lookup buffer
2660 was not large enough to hold them, Exim could crash while trying to process
2661 the truncated data. It now detects and logs this case.
2662
266317. Further to 4.21/58, another change has been made: if (and only if) the
2664 first line of a message (the first header line) ends with CRLF, a bare LF
2665 in a subsequent header line has a space inserted after it, so as not to
2666 terminate the header.
2667
266818. Refactoring: tidied an ugly bit of code in appendfile that copied data
2669 unnecessarily, used atoi() instead of strtol(), and didn't check the
2670 termination when getting file sizes from file names by regex.
2671
267219. Completely re-implemented the support for maildirsize files, in the light
2673 of a number of problems with the previous contributed implementation
2674 (4.30/29). In particular:
2675
2676 . If the quota is zero, the maildirsize file is maintained, but no quota is
2677 imposed.
2678
2679 . If the maildir directory does not exist, it is created before any attempt
2680 to write a maildirsize file.
2681
2682 . The quota value in the file is just a cache; if the quota is changed in
2683 the transport, the new value overrides.
2684
2685 . A regular expression is available for excluding directories from the
2686 count.
2687
268820. The autoreply transport checks the characters in options that define the
2689 message's headers; it allows continued headers, but it was checking with
2690 isspace() after an embedded newline instead of explicitly looking for a
2691 space or a tab.
2692
269321. If all the "regular" hosts to which an address was routed had passed their
2694 expiry times, and had not reached their retry times, the address was
2695 bounced, even if fallback hosts were defined. Now Exim should go on to try
2696 the fallback hosts.
2697
269822. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2699 equivalent code in the SMTP transport. Some hosts send humungous responses
2700 to HELO/EHLO, more than 1024 it seems.
2701
270223. Refactoring: code in filter.c used (void *) for "any old type" but this
2703 gives compiler warnings in some environments. I've now done it "properly",
2704 using a union.
2705
270624. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2707 (because of problems with the built-in one) was declared to return uschar *
2708 instead of char *, causing compiler failure.
2709
271025. Fixed a file descriptor leak when processing alias/forward files.
2711
271226. Fixed a minor format string issue in dbfn.c.
2713
271427. Typo in exim.c: ("dmbnz" for "dbmnz").
2715
271628. If a filter file refered to $h_xxx or $message_headers, and the headers
2717 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2718 become corrupted.
2719
272029. When a sender address is verified, it is cached, to save repeating the test
2721 when there is more than one recipient in a message. However, when the
2722 verification involves a callout, it is possible for different callout
2723 options to be set for different recipients. It is too complicated to keep
2724 track of this in the cache, so now Exim always runs a verification when a
2725 callout is required, relying on the callout cache for the optimization.
2726 The overhead is duplication of the address routing, but this should not be
2727 too great.
2728
272930. Fixed a bug in callout caching. If a RCPT command caused the sender address
2730 to be verified with callout=postmaster, and the main callout worked but the
2731 postmaster check failed, the verification correctly failed. However, if a
2732 subsequent RCPT command asked for sender verification *without* the
2733 postmaster check, incorrect caching caused this verification also to fail,
2734 incorrectly.
2735
273631. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2737 it was not caching the DNS options (qualify_single, search_parents) that
2738 were used when the lookup failed. A subsequent lookup with different
2739 options therefore always gave the same answer, though there were cases
2740 where it should not have. (Example: a "domains = !$mx_any" option on a
2741 dnslookup router: the "domains" option is always processed without any
2742 widening, but the router might have qualify_single set.) Now Exim uses the
2743 cached value only when the same options are set.
2744
274532. Added John Jetmore's "exipick" utility to the distribution.
2746
274733. GnuTLS: When an attempt to start a TLS session fails for any reason other
2748 than a timeout (e.g. a certificate is required, and is not provided), an
2749 Exim server now closes the connection immediately. Previously it waited for
2750 the client to close - but if the client is SSL, it seems that they each
2751 wait for each other, leading to a delay before one of them times out.
2752
275334: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2754 maintained 0.8.x compatibility because I don't think many are using it, and
2755 it is clearly obsolete.
2756
275735. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2758 transport.
2759
276036. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2761 client certificate was expired. A simple patch fixes this, though I don't
2762 understand the full logic of why the verify callback is called multiple
2763 times.
2764
276537. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2766 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2767 which causes problems with some clients (such as the Certicom SSL Plus
2768 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2769 disables the coutermeasure allowing Eudora to connect."
2770
277138. Exim was not checking that a write() to a log file succeeded. This could
2772 lead to Bad Things if a log got too big, in particular if it hit a file
2773 size limit. Exim now panics and dies if it cannot write to a log file, just
2774 as it does if it cannot open a log file.
2775
277639. Modified OS/Makefile-Linux so that it now contains
2777
2778 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2779
2780 The two -D definitions ensure that Exim is compiled with large file
2781 support, which makes it possible to handle log files that are bigger than
2782 2^31.
2783
278440. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2785 instance) a domain was checked against a named list that involved a lookup,
2786 causing $domain_data to be set, then another domain was checked against the
2787 same list, then the first domain was re-checked, the value of $domain_data
2788 after the final check could be wrong. In particular, if the second check
2789 failed, it could be set empty. This bug probably also applied to
2790 $localpart_data.
2791
279241. The strip_trailing_dot option was not being applied to the address given
2793 with the -f command-line option.
2794
279542. The code for reading a message's header from the spool was incrementing
2796 $received_count, but never initializing it. This meant that the value was
2797 incorrect (doubled) while delivering a message in the same process in which
2798 it was received. In the most common configuration of Exim, this never
2799 happens - a fresh exec is done - but it can happen when
2800 deliver_drop_privilege is set.
2801
280243. When Exim logs an SMTP synchronization error - client data sent too soon -
2803 it now includes up to 150 characters of the unexpected data in the log
2804 line.
2805
280644. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2807 and building data strings. The size of both of these buffers was 10 000
2808 bytes - far larger than anybody would *ever* want, thought I. Needless to
2809 say, somebody hit the limit. I have increased the maximum line length to
2810 20 000 and the maximum data length of concatenated lines to 100 000. I have
2811 also fixed two bugs, because there was no checking on these buffers. Tsk,
2812 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2813 buffer is too small.
2814
281545. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2816 lsearch lookups. Now it does.
2817
281846. When parsing a route_list item in a manualroute router, a fixed-length
2819 buffer was used for the list of hosts. I made this 1024 bytes long,
2820 thinking that nobody would ever have a list of hosts that long. Wrong.
2821 Somebody had a whole pile of complicated expansion conditions, and the
2822 string was silently truncated, leading to an expansion error. It turns out
2823 that it is easier to change to an unlimited length (owing to other changes
2824 that have happened since this code was originally written) than to build
2825 structure for giving a limitation error. The length of the item that
2826 expands into the list of hosts is now unlimited.
2827
282847. The lsearch lookup could not handle data where the length of text line was
2829 more than 4095 characters. Such lines were truncated, leading to shortened
2830 data being returned. It should now handle lines of any length.
2831
283248. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2833 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2834 ACL").
2835
283649. Cosmetic tidy to scripts like exicyclog that are generated by globally
2837 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2838 no longer happens in comment lines. A list of replacements is now placed
2839 at the head of all of the source files, except those whose only change is
2840 to replace PERL_COMMAND in the very first #! line.
2841
284250. Replaced the slow insertion sort in queue.c, for sorting the list of
2843 messages on the queue, with a bottom-up merge sort, using code contributed
2844 by Michael Haardt. This should make operations like -bp somewhat faster on
2845 large queues. It won't affect queue runners, except when queue_run_in_order
2846 is set.
2847
284851. Installed eximstats 1.31 in the distribution.
2849
285052. Added support for SRV lookups to the dnslookup router.
2851
285253. If an ACL referred to $message_body or $message_body_end, the value was not
2853 reset for any messages that followed in the same SMTP session.
2854
285554. The store-handling optimization for building very long strings was not
2856 differentiating between the different store pools. I don't think this
2857 actually made any difference in practice, but I've tidied it.
2858
285955. While running the routers to verify a sender address, $sender_address
2860 was still set to the sender address. This is wrong, because when routing to
2861 send a bounce to the sender, it would be empty. Therefore, I have changed
2862 it so that, while verifying a sender address, $sender_address is set to <>.
2863 (There is no change to what happens when verifying a recipient address.)
2864
286556. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2866 target A or AAAA records (if not already returned) without resetting the
2867 qualify_single or search_parents options of the DNS resolver. These are
2868 inappropriate in this case because the targets of MX and SRV records must
2869 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2870 target that, when qualified, matched something in the local domain. These
2871 two options are now turned off when doing these lookups.
2872
287357. It seems that at least some releases of Reiserfs (which does not have the
2874 concept of a fixed number of inodes) returns zero and not -1 for the
2875 number of available inodes. This interacted badly with check_spool_inodes,
2876 which assumed that -1 was the "no such thing" setting. What I have done is
2877 to check that the total number of inodes is greater than zero before doing
2878 the test of how many are available.
2879
288058. When a "warn" ACL statement has a log_message modifier, the message is
2881 remembered, and not repeated. This is to avoid a lot of repetition when a
2882 message has many recipients that cause the same warning to be written.
2883 Howewer, Exim was preserving the list of already written lines for an
2884 entire SMTP session, which doesn't seem right. The memory is now reset if a
2885 new message is started.
2886
288759. The "rewrite" debugging flag was not showing the result of rewriting in the
2888 debugging output unless log_rewrite was also set.
2889
289060. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2891 of (int)(handle) when we know that handle contains (void *)(-1).
2892
289361. The Exim daemon panic-logs an error return when it closes the incoming
2894 connection. However "connection reset by peer" seems to be common, and
2895 isn't really an error worthy of noting specially, so that particular error
2896 is no long logged.
2897
289862. When Exim is trying to find all the local interfaces, it used to panic and
2899 die if the ioctl to get the interface flags failed. However, it seems that
2900 on at least one OS (Solaris 9) it is possible to have an interface that is
2901 included in the list of interfaces, but for which you get a failure error
2902 for this call. This happens when the interface is not "plumbed" into a
2903 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2904 failure of the "get flags" call assumes that the interface is down.
2905
290663. Added a ${eval10: operator, which assumes all numbers are decimal. This
2907 makes life easier for people who are doing arithmetic on fields extracted
2908 from dates, where you often get leading zeros that should not be
2909 interpreted as octal.
2910
291164. Added qualify_domain to the redirect router, to override the global
2912 setting.
2913
291465. If a pathologically long header line contained very many addresses (the
2915 report of this problem mentioned 10 000) and each of them was rewritten,
2916 Exim could use up a very large amount of memory. (It kept on making new
2917 copies of the header line as it rewrote, and never released the old ones.)
2918 At the expense of a bit more processing, the header rewriting function has
2919 been changed so that it no longer eats memory in this way.
2920
292166. The generation of the Received: header has been moved from the time that a
2922 message starts to be received, to the time that it finishes. The timestamp
2923 in the Received: header should now be very close to that of the <= log
2924 line. There are two side-effects of this change:
2925
2926 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2927 logged header lines no longer include the local Received: line, because
2928 it has not yet been created. The same applies to a copy of the message
2929 that is returned to a non-SMTP sender when a message is rejected.
2930
2931 (b) When a filter file is tested using -bf, no additional Received: header
2932 is added to the test message. After some thought, I decided that this
2933 is a bug fix.
2934
2935 This change does not affect the value of $received_for. It is still set
2936 after address rewriting, but before local_scan() is called.
2937
293867. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2939
294068. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2941 gave an unhelpful panic error message, and a defer error. I have managed to
2942 change this behaviour so that it now rejects any supplied certificate,
2943 which seems right, as the list of acceptable certificates is empty.
2944
294569. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2946 gave an unhelpful defer error. I have not managed to make this reject any
2947 supplied certificates, but the error message it gives is "no certificate
2948 supplied", which is not helpful.
2949
295070. exigrep's output now also includes lines that are not associated with any
2951 message, but which match the given pattern. Implemented by a patch from
2952 Martin Sluka, which also tidied up the Perl a bit.
2953
295471. Recipient callout verification, like sender verification, was using <> in
2955 the MAIL FROM command. This isn't really the right thing, since the actual
2956 sender may affect whether the remote host accepts the recipient or not. I
2957 have changed it to use the actual sender in the callout; this means that
2958 the cache record is now keyed on a recipient/sender pair, not just the
2959 recipient address. There doesn't seem to be a real danger of callout loops,
2960 since a callout by the remote host to check the sender would use <>.
2961 [SEE ABOVE: changed after hitting problems.]
2962
296372. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2964 temporary errors. However, in the case of such a code being given after
2965 the end of a data transmission (i.e. after ".") Exim was failing to write
2966 a retry record for the message. (Yes, there was some broken host that was
2967 actually sending 8xx at this point.)
2968
296973. An unknown lookup type in a host list could cause Exim to panic-die when
2970 the list was checked. (An example that provoked this was putting <; in the
2971 middle of a list instead of at the start.) If this happened during a DATA
2972 ACL check, a -D file could be left lying around. This kind of configuration
2973 error no longer causes Exim to die; instead it causes a defer errror. The
2974 incident is still logged to the main and panic logs.
2975
297674. Buglet left over from Exim 3 conversion. The message "too many messages
2977 in one connection" was written to the rejectlog but not the mainlog, except
2978 when address rewriting (yes!) was being logged.
2979
298075. Added write_rejectlog option.
2981
298276. When a system filter was run not as root (that is, when system_filter_user
2983 was set), the values of the $n variables were not being returned to the
2984 main process; thus, they were not subsequently available in the $sn
2985 variables.
2986
298777. Added +return_path_on_delivery log selector.
2988
298978. A connection timeout was being treated differently from recipients deferred
2990 when testing hosts_max_try with a message that was older than the host's
2991 retry timeout. (The host should not be counted, thus allowing all hosts to
2992 be tried at least once before bouncing.) This may have been the cause of an
2993 occasionally reported bug whereby a message would remain on the queue
2994 longer than the retry timeout, but would be bounced if a delivery was
2995 forced. I say "may" because I never totally pinned down the problem;
2996 setting up timeout/retry tests is difficult. See also the next item.
2997
299879. The ultimate address timeout was not being applied to errors that involved
2999 a combination of host plus message (for example, a timeout on a MAIL
3000 command). When an address resolved to a number of possible hosts, and they
3001 were not all tried for each delivery (e.g. because of hosts_max_try), a
3002 message could remain on the queue longer than the retry timeout.
3003
300480. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3005 Haardt.
3006
300781. Fixed an obscure SMTP outgoing bug which required at least the following
3008 conditions: (a) there was another message waiting for the same server;
3009 (b) the server returned 5xx to all RCPT commands in the first message so
3010 that the message was not completed; (c) the server dropped the connection
3011 or gave a negative response to the RSET that Exim sends to abort the
3012 transaction. The observed case was a dropped connection after DATA that had
3013 been sent in pipelining mode. That is, the server had advertised PIPELINING
3014 but was not implementing it correctly. The effect of the bug was incorrect
3015 behaviour, such as trying another host, and this could lead to a crash.
3016
3017
3018Exim version 4.30
3019-----------------
3020
3021 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3022 and daemon.c were passed as pointers to ints; they should have been
3023 pointers to socklen_t variables (which are typically unsigned ints).
3024
3025 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3026 fixed.
3027
3028 3. Fixed a really odd bug that affected only the testing scheme; patching a
3029 certain fixed string in the binary changed the value of another string that
3030 happened to be identical to the end of the original first string.
3031
3032 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3033 name", it returns that address as the IP address. On some operating
3034 systems (e.g. Solaris), it also passes back the IP address string as the
3035 "host name". However, on others (e.g. Linux), it passes back an empty
3036 string. Exim wasn't checking for this, and was changing the host name to an
3037 empty string, assuming it had been canonicized.
3038
3039 5. Although rare, it is permitted to have more than one PTR record for a given
3040 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3041 all the names associated with an address, because they do in Solaris.
3042 However, it seems that they do not in Linux for data that comes from the
3043 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3044 I found this out when I moved to a new Linux workstation and tried to run
3045 the Exim test suite.
3046
3047 To get round this problem I have changed the code so that it now does its
3048 own call to the DNS to look up PTR records when searching for a host name.
3049 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3050 addresses that are only in /etc/hosts are still found.
3051
3052 This behaviour is, however, controlled by an option called host_lookup_
3053 order, which defaults to "bydns:byaddr". If people want to use the other
3054 order, or indeed, just use one or the other means of lookup, they can
3055 specify it in this variable.
3056
3057 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3058 some operating systems, this comes back from gethostbyaddr() as an empty
3059 string, and this is what Exim used to test for. However, it seems that in
3060 other systems, "." is yielded. Exim now tests for this case too.
3061
3062 7. The values of check_spool_space and check_log_space are now held internally
3063 as a number of kilobytes instead of an absolute number of bytes. If a
3064 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3065 kilobyte. This means that much larger values can be stored.
3066
3067 8. Exim monitor: an attempt to get the action menu when not actually pointing
3068 at a message produces an empty menu entitled "No message selected". This
3069 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3070 no entries in it ("Shell widget menu has zero width and/or height"). So I
3071 have added a single, blank menu entry in this case.
3072
3073 9. Added ${quote_local_part.
3074
307510. MIME decoding is now applied to the contents of Subject: header lines when
3076 they are logged.
3077
307811. Now that a reference to $sender_host_address automatically causes a reverse
3079 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3080 host lookup before query-style lookups in lists that might use this
3081 variable. This has therefore been abolished, and the "net-" prefix is no
3082 longer necessary for query-style lookups.
3083
308412. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3085 have been a typo for LFLAGS, so it has been changed.
3086
308713. The install script calls Exim with "-C /dev/null" in order to find the
3088 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3089 to be output. Howeve, since Exim outputs its version number before the
3090 error, it didn't break the script. It just looked ugly. I fixed this by
3091 always allowing "-C /dev/null" if the caller is root.
3092
309314. Ignore overlarge ACL variable number when reading spool file - insurance
3094 against a later release with more variables having written the file.
3095
309615. The standard form for an IPv6 address literal was being rejected by EHLO.
3097 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3098 this, as well as the form without the "IPv6" on the front.
3099
310016. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3101 OS/Makefile-Darwin file.
3102
310317. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3104 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3105
310618. After change 4.21/52, "%ld" was used to format the contents of the $inode
3107 variable. However, some OS use ints for inodes. I've added cast to long int
3108 to get rid of the compiler warning.
3109
311019. I had forgotten to lock out "/../" in configuration file names when
3111 ALT_CONFIG_PREFIX was set.
3112
311320. Routers used for verification do not need to specify transports. However,
3114 if such a router generated a host list, and callout was configured, Exim
3115 crashed, because it could not find a port number from the (non-existent)
3116 transport. It now assumes port 25 in this circumstance.
3117
311821. Added the -t option to exigrep.
3119
312022. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3121 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3122 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3123 them is set, LOOKUP_LSEARCH is forced.
3124
312523. "exim -bV" now outputs a list of lookups that are included in the binary.
3126
312724. Added sender and host information to the "rejected by local_scan()" log
3128 line; previously there was no indication of these.
3129
313025. Added .include_if_exists.
3131
313226. Change 3.952/11 added an explicit directory sync on top of a file sync for
3133 Linux. It turns out that not all file systems support this. Apparently some
3134 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3135 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3136 not supported on the file descriptor, is now ignored when Exim is trying to
3137 sync a directory. This applies only to Linux.
3138
313927. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3140
314128. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3142 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3143 this.
3144
314529. Added support for maildirsize files from supplied patch (modified a bit).
3146
314730. The use of :fail: followed by an empty string could lead Exim to respond to
3148 sender verification failures with (e.g.):
3149
3150 550 Verification failed for <xxx>
3151 550 Sender verify failed
3152
3153 where the first response line was missing the '-' that indicates it is not
3154 the final line of the response.
3155
315631. The loop for finding the name of the user that called Exim had a hardwired
3157 limit of 10; it now uses the value of finduser_retries, which is used for
3158 all other user lookups.
3159
316032. Added $received_count variable, available in data and not_smtp ACLs, and at
3161 delivery time.
3162
316333. Exim was neglecting to zero errno before one call of strtol() when
3164 expanding a string and expecting an integer value. On some systems this
3165 resulted in spurious "integer overflow" errors. Also, it was casting the
3166 result into an int without checking.
3167
316834. Testing for a connection timeout using "timeout_connect" in the retry rules
3169 did not work. The code looks as if it has *never* worked, though it appears
3170 to have been documented since at least releast 1.62. I have made it work.
3171
317235. The "timeout_DNS" error in retry rules, also documented since at least
3173 1.62, also never worked. As it isn't clear exactly what this means, and
3174 clearly it isn't a major issue, I have abolished the feature by treating it
3175 as "timeout", and writing a warning to the main and panic logs.
3176
317736. The display of retry rules for -brt wasn't always showing the error code
3178 correctly.
3179
318037. Added new error conditions to retry rules: timeout_A, timeout_MX,
3181 timeout_connect_A, timeout_connect_MX.
3182
318338. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3184 to the empty sender.
3185
318639. The daemon was not analysing the content of -oX till after it had closed
3187 stderr and disconnected from the controlling terminal. This meant that any
3188 syntax errors were only noted on the panic log, and the return code from
3189 the command was 0. By re-arranging the code a little, I've made the
3190 decoding happen first, so such errors now appear on stderr, and the return
3191 code is 1. However, the actual setting up of the sockets still happens in
3192 the disconnected process, so errors there are still only recorded on the
3193 panic log.
3194
319540. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3196 connections (as happens on some IP stacks) was logged at start up time as
3197 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3198 it from "IPv6 and IPv4", which means that two separate sockets are being
3199 used.
3200
320141. The debug output for gethostbyname2() or getipnodebyname() failures now
3202 says whether AF_INET or AF_INET6 was passed as an argument.
3203
320442. Exiwhat output was messed up when time zones were included in log
3205 timestamps.
3206
320743. Exiwhat now gives more information about the daemon's listening ports,
3208 and whether -tls-on-connect was used.
3209
321044. The "port" option of the smtp transport is now expanded.
3211
321245. A "message" modifier in a "warn" statement in a non-message ACL was being
3213 silently ignored. Now an error message is written to the main and panic
3214 logs.
3215
321646. There's a new ACL modifier called "logwrite" which writes to a log file
3217 as soon as it is encountered.
3218
321947. Added $local_user_uid and $local_user_gid at routing time.
3220
322148. Exim crashed when trying to verify a sender address that was being
3222 rewritten to "<>".
3223
322449. Exim was recognizing only a space character after ".include". It now also
3225 recognizes a tab character.
3226
322750. Fixed several bugs in the Perl script that creates the exim.8 man page by
3228 extracting the relevant information from the specification. The man page no
3229 longer contains scrambled data for the -d option, and I've added a section
3230 at the front about calling Exim under different names.
3231
323251. Added "extra_headers" argument to the "mail" command in filter files.
3233
323452. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3235 crash.
3236
323753. Installed eximstats 1.29.
3238
323954. Added transport_filter_timeout as a generic transport option.
3240
324155. Exim no longer adds an empty Bcc: header to messages that have no To: or
3242 Cc: header lines. This was required by RFC 822, but it not required by RFC
3243 2822.
3244
324556. Exim used to add From:, Date:, and Message-Id: header lines to any
3246 incoming messages that did not have them. Now it does so only if the
3247 message originates locally, that is, if there is no associated remote host
3248 address. When Resent- header lines are present, this applies to the Resent-
3249 lines rather than the non-Resent- lines.
3250
325157. Drop incoming SMTP connection after too many syntax or protocol errors. The
3252 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3253
325458. Messages for configuration errors now include the name of the main
3255 configuration file - useful now that there may be more than one file in a
3256 list (.included file names were always shown).
3257
325859. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3259 for those rare installations that do not start the daemon as root or run it
3260 setuid root. I've cut out the call to initgroups() if the daemon is not
3261 root at that time.
3262
326360. The Exim user and group can now be bound into the binary as text strings
3264 that are looked up at the start of Exim's processing.
3265
326661. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3267
326862. Added $mailstore_basename variable.
3269
327063. Installed patch to sieve.c from Michael Haardt.
3271
327264. When Exim failed to open the panic log after failing to open the main log,
3273 the original message it was trying to log was written to stderr and debug
3274 output, but if they were not available (the usual case in production), it
3275 was lost. Now it is written to syslog before the two lines that record the
3276 failures to open the logs.
3277
327865. Users' Exim filters run in subprocesses under the user's uid. It is
3279 possible for a "deliver" command or an alias in a "personal" command to
3280 provoke an address rewrite. If logging of address rewriting is configured,
3281 this fails because the process is not running as root or exim. There may be
3282 a better way of dealing with this, but for the moment (because 4.30 needs
3283 to be released), I have disabled address rewrite logging when running a
3284 filter in a non-root, non-exim process.
3285
3286
3287Exim version 4.24
3288-----------------
3289
3290 1. The buildconfig auxiliary program wasn't quoting the value set for
3291 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3292 not defined. This bug was masked in 4.22 by the effect that was fixed in
3293 change 4.23/1.
3294
3295 2. Some messages that were rejected after a message id was allocated were
3296 shown as "incomplete" by exigrep. It no longer does this for messages that
3297 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3298
3299 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3300 have allow_domain_literals set, the ID did not get logged in the <= line.
3301 Domain literals are now always recognized in Message-ID: header lines.
3302
3303 4. The first argument for a ${extract expansion item is the key name or field
3304 number. Leading and trailing spaces in this item were not being ignored,
3305 causing some misleading effects.
3306
3307 5. When deliver_drop_privilege was set, single queue runner processes started
3308 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3309 same command in the process it spins off) were not dropping privilege.
3310
3311 6. When the daemon running as "exim" started a queue runner, it always
3312 re-executed Exim in the spun-off process. This is a waste of effort when
3313 deliver_drop_privilege is set. The new process now just calls the
3314 queue-runner function directly.
3315
3316
3317Exim version 4.23
3318-----------------
3319
3320 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3321 HEADERS_CHARSET.
3322
3323 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3324 ignored. Though the use of -oP was forcing the writing of a pid file, it
3325 was always written to the default place.
3326
3327 3. If the message "no IP address found for host xxxx" is generated during
3328 incoming verification, it is now followed by identification of the incoming
3329 connection (so you can more easily find what provoked it).
3330
3331 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3332
3333 5. Added some features to "harden" Exim a bit more against certain attacks:
3334
3335 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3336 be put in Local/Makefile. This is like the never_users runtime option,
3337 but it cannot be overridden. The default setting is "root".
3338
3339 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3340 prefix string with which any file named in a -C command line option
3341 must start.
3342
3343 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3344 is retained for -C and -D only if the caller of Exim is root. Without
3345 it, the exim user may also use -C and -D and retain privilege.
3346
3347 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3348 command line option is disabled.
3349
3350 6. Macro names set by the -D option must start with an upper case letter, just
3351 like macro names defined in the configuration file.
3352
3353 7. Added "dereference=" facility to LDAP.
3354
3355 8. Two instances of the typo "uknown" in the source files are fixed.
3356
3357 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3358 the Configure-Makefile script screwed up while processing it.
3359
336010. Incorporated PCRE 4.4.
3361
336211. The SMTP synchronization check was not operating right at the start of an
3363 SMTP session. For example, it could not catch a HELO sent before the client
3364 waited for the greeting. There is now a check for outstanding input at the
3365 point when the greeting is written. Because of the duplex, asynchronous
3366 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3367 way, but not yet received, when the check is performed.
3368
336912. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3370 on TCP/IP sockets, because this apparently causes some broken clients to
3371 timeout.
3372
337313. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3374 unchanged) from the Cygwin maintainer.
3375
337614. The code for -bV that shows what is in the binary showed "mbx" when maildir
3377 was supported instead of testing for mbx. Effectively a typo.
3378
337915. The spa authenticator server code was not checking that the input it
3380 received was valid base64.
3381
338216. The debug output line for the "set" modifier in ACLs was not showing the
3383 name of the variable that was being set.
3384
338517. Code tidy: the variable type "vtype_string" was never used. Removed it.
3386
338718. Previously, a reference to $sender_host_name did not cause a DNS reverse
3388 lookup on its own. Something else was needed to trigger the lookup. For
3389 example, a match in host_lookup or the need for a host name in a host list.
3390 Now, if $sender_host_name is referenced and the host name has not yet been
3391 looked up, a lookup is performed. If the lookup fails, the variable remains
3392 empty, and $host_lookup_failed is set to "1".
3393
339419. Added "eqi" as a case-independent comparison operator.
3395
339620. The saslauthd authentication condition could segfault if neither service
3397 nor realm was specified.
3398
339921. If an overflowing value such as "2048M" was set for message_size_limit, the
3400 error message that was logged was misleading, and incoming SMTP
3401 connections were dropped. The message is now more accurate, and temporary
3402 errors are given to SMTP connections.
3403
340422. In some error situations (such as 21 above) Exim rejects all SMTP commands
3405 (except RSET) with a 421 error, until QUIT is received. However, it was
3406 failing to send a response to QUIT.
3407
340823. The HELO ACL was being run before the code for helo_try_verify_hosts,
3409 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3410 ACL is now run after the helo_try_verify_hosts code.
3411
341224. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3413 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3414 case-independent, so other case variants are also recognized). Apparently
3415 some systems use these upper case variants.
3416
341725. If more than two messages were waiting for the same host, and a transport
3418 filter was specified for the transport, Exim sent two messages over the
3419 same TCP/IP connection, and then failed with "socket operation on non-
3420 socket" when it tried to send the third.
3421
342226. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3423
342427. The extern definition of crypt16() in expand.c was not being excluded when
3425 the OS had its own crypt16() function.
3426
342728. Added bounce_return_body as a new option, and bounce_return_size_limit
3428 as a preferred synonym for return_size_limit, both as an option and as an
3429 expansion variable.
3430
343129. Added LIBS=-liconv to OS/Makefile-OSF1.
3432
343330. Changed the default configuration ACL to relax the local part checking rule
3434 for addresses that are not in any local domains. For these addresses,
3435 slashes and pipe symbols are allowed within local parts, but the sequence
3436 /../ is explicitly forbidden.
3437
343831. SPA server authentication was not clearing the challenge buffer before
3439 using it.
3440
344132. log_message in a "warn" ACL statement was writing to the reject log as
3442 well as to the main log, which contradicts the documentation and doesn't
3443 seem right (because no rejection is happening). So I have stopped it.
3444
344533. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3446 However, I am unable to do any testing of this.
3447
344834. Fixed an infelicity in the appendfile transport. When checking directories
3449 for a mailbox, to see if any needed to be created, it was accidentally
3450 using path names with one or more superfluous leading slashes; tracing
3451 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3452
345335. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3454 contents are added to the log line that is written for every discarded
3455 recipient. (Previously a log_message setting was ignored.)
3456
345736. The ${quote: operator now quotes the string if it is empty.
3458
345937. The install script runs exim in order to find its version number. If for
3460 some reason other than non-existence or emptiness, which it checks, it
3461 could not run './exim', it was installing it with an empty version number,
3462 i.e. as "exim-". This error state is now caught, and the installation is
3463 aborted.
3464
346538. An argument was missing from the function that creates an error message
3466 when Exim fails to connect to the socket for saslauthd authentication.
3467 This could cause Exim to crash, or give a corrupted message.
3468
346939. Added isip, isip4, and isip6 to ${if conditions.
3470
347140. The ACL variables $acl_xx are now saved with the message, and can be
3472 accessed later in routers, transports, and filters.
3473
347441. The new lookup type nwildlsearch is like wildlsearch, except that the key
3475 strings in the file are not string-expanded.
3476
347742. If a MAIL command specified a SIZE value that was too large to fit into an
3478 int variable, the check against message_size_limit failed. Such values are
3479 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3480 day this will have to be increased, but I don't think I want to be around
3481 when emails are that large.
3482
3483
3484
3485Exim version 4.22
3486-----------------
3487
3488 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3489 iconv() is not standard in FreeBSD.
3490
3491 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3492 IPv6 enabled. The observed symptom was a segmentation fault on return from
3493 the function os_common_find_running_interfaces() in src/os.c.
3494
3495 3. In the check_special_case() function in daemon.c I had used "errno" as an
3496 argument name, which causes warnings on some systems. This was basically a
3497 typo, since it was named "eno" in the comments!
3498
3499 4. The code that waits for the clock to tick (at a resolution of some fraction
3500 of a second) so as to ensure message-id uniqueness was always waiting for
3501 at least one whole tick, when it could have waited for less. [This is
3502 almost certainly not relevant at current processor speeds, where it is
3503 unlikely to ever wait at all. But we try to future-proof.]
3504
3505 5. The function that sleeps for a time interval that includes fractions of a
3506 second contained a race. It did not block SIGALRM between setting the
3507 timer, and suspending (a couple of lines later). If the interval was short
3508 and the sigsuspend() was delayed until after it had expired, the suspension
3509 never ended. On busy systems this could lead to processes getting stuck for
3510 ever.
3511
3512 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3513 process, before it forks any delivery processes. The open lookup caching
3514 mechanism meant that the open file or database connection was passed into
3515 the delivery process. The problem was that delivery processes always tidy
3516 up cached lookup data. This could cause a problem for the next delivery
3517 process started by the queue runner, because the external queue runner
3518 process does not know about the closure. So the next delivery process
3519 still has data in the lookup cache. In the case of a file lookup, there was
3520 no problem because closing a file descriptor in a subprocess doesn't affect
3521 the parent. However, if the lookup was caching a connection to a database,
3522 the connection was closed, and the second delivery process was likely to
3523 see errors such as "PGSQL: query failed: server closed the connection
3524 unexpectedly". The problem has been fixed by closing all cached lookups
3525 in a queue runner before running a delivery process.
3526
3527 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3528 seem to have the "const" qualifier which it has on other OS. I've
3529 parameterised it.
3530
3531 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3532 *of the same type* (client or server) with the same public name that an
3533 error should be diagnosed.
3534
3535 9. When Exim looked up a host name for an IP address, but failed to find the
3536 original IP address when looking up the host name (a safety check), it
3537 output the message "<ip address> does not match any IP for NULL", which was
3538 confusing, to say the least. The bug was that the host name should have
3539 appeared instead of "NULL".
3540
354110. Since release 3.03, if Exim is called by a uid other than root or the Exim
3542 user that is built into the binary, and the -C or -D options is used, root
3543 privilege is dropped before the configuration file is read. In addition,
3544 logging is switched to stderr instead of the normal log files. If the
3545 configuration then re-defines the Exim user, the unprivileged environment
3546 is probably not what is expected, so Exim logs a panic warning message (but
3547 proceeds).
3548
3549 However, if deliver_drop_privilege is set, the unprivileged state may well
3550 be exactly what is intended, so the warning has been cut out in that case,
3551 and Exim is allowed to try to write to its normal log files.
3552
3553
3554Exim version 4.21
3555-----------------
3556
3557 1. smtp_return_error_details was not giving details for temporary sender
3558 or receiver verification errors.
3559
3560 2. Diagnose a configuration error if two authenticators have the same public
3561 name.
3562
3563 3. Exim used not to create the message log file for a message until the first
3564 delivery attempt. This could be confusing when incoming messages were held
3565 for policy or load reasons. The message log file is now created at the time
3566 the message is received, and an initial "Received" line is written to it.
3567
3568 4. The automatically generated man page for command line options had a minor
3569 bug that caused no ill effects; however, a more serious problem was that
3570 the procedure for building the man page automatically didn't always
3571 operate. Consequently, release 4.20 contains an out-of-date version. This
3572 shouldn't happen again.
3573
3574 5. When building Exim with embedded Perl support, the script that builds the
3575 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3576 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3577
3578 6. The freeze_tell option was not being used for messages that were frozen on
3579 arrival, either by an ACL or by local_scan().
3580
3581 7. Added the smtp_incomplete_transaction log selector.
3582
3583 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3584 was accepting AUTH without a new EHLO.
3585
3586 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3587 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3588 RFC.
3589
359010. Logging of TCP/IP connections (when configured) now happens in the main
3591 daemon process instead of the child process, so that the TCP/IP connection
3592 count is more accurate (but it can never be perfect).
3593
359411. The use of "drop" in a nested ACL was not being handled correctly in the
3595 outer ACL. Now, if condition failure induced by the nested "drop" causes
3596 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3597 or "require"), the connection is dropped.
3598
359912. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3600 that yield "discard" can now be used with an "accept" or a "discard" verb,
3601 but an error is generated for any others (because I can't see a useful way
3602 to define what should happen).
3603
360413. When an ACL is read dynamically from a file (or anywhere else), the lines
3605 are now processed in the same way as lines in the Exim configuration file.
3606 In particular, continuation lines are supported.
3607
360814. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3609
361015. Added -ti meaning -t -i.
3611
361216. Check for letters, digits, hyphens, and dots in the names of dnslist
3613 domains, and warn by logging if others are found.
3614
361517. At least on BSD, alignment is not guarenteed for the array of ifreq's
3616 returned from GIFCONF when Exim is trying to find the list of interfaces on
3617 a host. The code in os.c has been modified to copy each ifreq to an aligned
3618 structure in all cases.
3619
3620 Also, in some cases, the returned ifreq's were being copied to a 'struct
3621 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3622 means the last couple of bytes of an IPv6 address could be chopped if the
3623 ifreq contained only a normal sockaddr (14 bytes storage).
3624
362518. Named domain lists were not supported in the hosts_treat_as_local option.
3626 An entry such as +xxxx was not recognized, and was treated as a literal
3627 domain name.
3628
362919. Ensure that header lines added by a DATA ACL are included in the reject log
3630 if the ACL subsequently rejects the message.
3631
363220. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3633 MD5 (which is deprecated).
3634
363521. When testing a filter file using -bf, Exim was writing a message when it
3636 took the sender from a "From " line in the message, but it was not doing so
3637 when it took $return_path from a Return-Path: header line. It now does.
3638
363922. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3640 with a valid header line field name (a series of printing characters
3641 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3642
364323. Changed "disc" in the source to "disk" to conform to the documentation and
3644 the book and for uniformity.
3645
364624. Ignore Sendmail's -Ooption=value command line item.
3647
364825. When execve() failed while trying to run a command in a pipe transport,
3649 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3650 could be confused with a return value of 69 from the command itself. This
3651 has been changed to 127, the value the shell returns if it is asked to run
3652 a non-existent command. The wording for the related log line suggests a
3653 non-existent command as the problem.
3654
365526. If received_header_text expands to an empty string, do not add a Received:
3656 header line to the message. (Well, it adds a token one on the spool, but
3657 marks it "old" so that it doesn't get used or transmitted.)
3658
365927. Installed eximstats 1.28 (addition of -nt option).
3660
366128. There was no check for failure on the call to getsockname() in the daemon
3662 code. This can fail if there is a shortage of resources on the system, with
3663 ENOMEM, for example. A temporary error is no