HP-UX configuration update.
[exim.git] / doc / doc-txt / ChangeLog
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d114ec46 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.333 2006/03/17 09:39:00 ph10 Exp $
495ae4b0
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2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
214e2000
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6Exim version 4.61
7-----------------
8
9PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
15 addresses as local.
16
f9daeae0
PH
17PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
19
7e66e54d
PH
20PH/03 Added disable_ipv6.
21
c8ea1597
PH
22PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
27 grumble.
28
911f6fde
PH
29PH/05 If group was specified without a user on a router, and no group or user
30 was specified on a transport, the group from the router was ignored.
31
47ca6d6c
PH
32PH/06 Increased the number of ACL variables to 20 of each type, and arranged
33 for visible compile-time settings that can be used to change these
34 numbers, for those that want even more. Backwards compatibility with old
35 spool files has been maintained. However, going back to a previous Exim
36 release will lost any variables that are in spool files.
37
ed0e9820
PH
38PH/07 Two small changes when running in the test harness: increase delay when
39 passing a TCP/IP connection to a new process, in case the original
40 process has to generate a bounce, and remove special handling of
41 127.0.0.2 (sic), which is no longer necessary.
42
eff37e47
PH
43PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
45
1921d2ea
PH
46PH/09 Moved a debug statement in filter processing to avoid a race problem when
47 testing.
48
b3f69ca8
JJ
49JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
51
52JJ/02 exipick: Added support for new ACL variable spool format introduced
53 in 4.61-PH/06
54
424a1c63
PH
55PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
56 syntactically invalid From: or Reply-to: line, and a filter used this to
57 generate an autoreply, and therefore failed to obtain an address for the
58 autoreply, Exim could try to deliver to a non-existent relative file
59 name, causing unrelated and misleading errors. What now happens is that
60 it logs this as a hard delivery error, but does not attempt to create a
61 bounce message.
62
7a100415
PH
63PH/11 The exinext utility has a -C option for testing purposes, but although
64 the given file was scanned by exinext itself; it wasn't being passed on
65 when Exim was called.
66
19b9dc85
PH
67PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
68 an end-of-file indication when reading a command response.
69
309bd837
PH
70PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
71 compiled. In many other places in Exim, IPv6 addresses are always
72 recognized, so I have changed this. It also means that IPv4 domain
73 literals of the form [IPV4:n.n.n.n] are now always recognized.
74
59e82a2a
PH
75PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
76 used if the router is not running as root, for example, when verifying at
77 ACL time, or when using -bh. The debugging output from this situation was
78 non-existent - all you got was a failure to exec. I have made two
79 changes:
80
81 (a) Failures to set uid/gid, the current directory, or a process leader
82 in a subprocess such as that created by queryprogram now generate
83 suitable debugging ouput when -d is set.
84
85 (b) The queryprogram router detects when it is not running as root,
86 outputs suitable debugging information if -d is set, and then runs
87 the subprocess without attempting to change uid/gid.
88
9edc04ce
PH
89PH/15 Minor change to Makefile for building test_host (undocumented testing
90 feature).
91
1349e1e5
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92PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
93 additional section of a DNS packet that returns MX or SRV records.
94 Instead, it always explicitly searches for A/AAAA records. This avoids
95 major problems that occur when a DNS server includes only records of one
96 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
97 fixed another bug: if SRV records were looked up and the corresponding
98 address records were *not* found in the additional section, the port
99 values from the SRV records were lost.
100
ea49d0e1
PH
101PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
102 using the correct key (the original address) when searching the retry
103 rules in order to find which one to use for generating the retry hint.
104
064a94c9
PH
105PH/18 If quota_warn_message contains a From: header, Exim now refrains from
106 adding the default one. Similarly, if it contains a Reply-To: header, the
107 errors_reply_to option, if set, is not used.
108
727071f8
PH
109PH/19 When calculating a retry time, Exim used to measure the "time since
110 failure" by looking at the "first failed" field in the retry record. Now
111 it does not use this if it is later than than the arrival time of the
112 message. Instead it uses the arrival time. This makes for better
113 behaviour in cases where some deliveries succeed, thus re-setting the
114 "first failed" field. An example is a quota failure for a huge message
115 when small messages continue to be delivered. Without this change, the
116 "time since failure" will always be short, possible causing more frequent
117 delivery attempts for the huge message than are intended.
118
f78eb7c6
PH
119PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
122
21c28500
PH
123PH/21 Make -bV show the size of off_t variables so that the test suite can
124 decide whether to run tests for quotas > 2G.
125
126PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
127 mailbox_size, and mailbox_filecount in the appendfile transport. If a
128 filecount value is greater than 2G or if a quota value is greater than 2G
129 on a system where the size of off_t is not greater than 4, a panic error
130 is given.
131
1688f43b
PH
132PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
133 never match. The debug and -bh output now contains an explicit error
134 message indicating a malformed IPv4 address or mask.
135
136PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
137 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
138 PH/23 above applies.
139
9675b384
PH
140PH/25 Do not write to syslog when running in the test harness. The only
141 occasion when this arises is a failure to open the main or panic logs
142 (for which there is an explicit test).
143
6a3f1455
PH
144PH/26 Added the /no_tell option to "control=freeze".
145
dac79d3e
PH
146PH/27 If a host name lookup failed very early in a connection, for example, if
147 the IP address matched host_lookup and the reverse lookup yielded a name
148 that did not have a forward lookup, an error message of the form "no IP
149 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
150 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 151
5977a0b3
PH
152PH/28 An enabling patch from MH: add new function child_open_exim2() which
153 allows the sender and the authenticated sender to be set when
154 submitting a message from within Exim. Since child_open_exim() is
155 documented for local_scan(), the new function should be too.
156
c91535f3
PH
157PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
158 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
159 results in an empty string is now treated as unset.
160
0d46a8c8
PH
161PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
162
278c6e6c
PH
163PH/31 Added sender_verify_fail logging option.
164
2cbb4081
PH
165PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
166 needed by RFC 822 but not by RFC 2822 was commented out. I have now
167 tidied the source and removed it altogether.
168
3eef829e
PH
169PH/33 When a queue run was abandoned because the load average was too high, a
170 log line was always written; now it is written only if the queue_run log
171 selector is set. In addition, the log line for abandonment now contains
172 information about the queue run such as the pid. This is always present
173 in "start" and "stop" lines but was omitted from the "abandon" line.
174
1ab95fa6
PH
175PH/34 Omit spaces between a header name and the colon in the error message that
176 is given when verify = headers_syntax fails (if there are lots of them,
177 the message gets confusing).
178
230205fc
PH
179PH/35 Change the default for dns_check_names_pattern to allow slashes within
180 names, as there are now some PTR records that contain slashes. This check
181 is only to protect against broken name servers that fall over on strange
182 characters, so the fact that it applies to all lookups doesn't matter.
183
75e0e026
PH
184PH/36 Now that the new test suite is complete, we can remove some of the
185 special code in Exim that was needed for the old test suite. For example,
186 sorting DNS records because real resolvers return them in an arbitrary
187 order. The new test suite's fake resolver always returns records in the
188 same order.
189
190PH/37 When running in the test harness, use -odi for submitted messages (e.g.
191 bounces) except when queue_only is set, to avoid logging races between
192 the different processes.
193
145396a6
PH
194PH/38 Panic-die if .include specifies a non-absolute path.
195
3cd34f13
PH
196PH/39 A tweak to the "H" retry rule from its user.
197
11121d3d
JJ
198JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
199 a label. They prevented compilation on older perls.
200
201JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
202 a warning to be raised on newish perls.
203
204JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
205 on queue. Changes to match documented behaviour of showing count of
206 messages matching specified criteria.
207
8def5aaf
PH
208PH/40 Changed the default ident timeout from 30s to 5s.
209
929ba01c
PH
210PH/41 Added support for the use of login_cap features, on those BSD systems
211 that have them, for controlling the resources used by pipe deliveries.
212
2632889e
PH
213PH/42 The content-scanning code uses fopen() to create files in which to put
214 message data. Previously it was not paying any attention to the mode of
215 the files. Exim runs with umask(0) because the rest of the code creates
216 files with open(), and sets the required mode explicitly. Thus, these
217 files were ending up world-writeable. This was not a big issue, because,
218 being within the spool directory, they were not world-accessible. I have
219 created a function called modefopen, which takes an additional mode
220 argument. It sets umask(777), creates the file, chmods it to the required
221 mode, then resets the umask. All the relevant calls to fopen() in the
222 content scanning code have been changed to use this function.
223
944a9c55
PH
224PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
225 to 24 hours. This avoids potential overflow problems when processing G
226 and H retry rules. I suspect nobody ever tinkers with this value.
227
4a23603b
PH
228PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
229
4730f942
PH
230PH/45 When the plaintext authenticator is running as a client, the server's
231 challenges are checked to ensure they are valid base64 strings. By
232 default, the authentication attempt is cancelled if an invalid string is
233 received. Setting client_ignore_invalid_base64 true ignores these errors.
234 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
235 they are received. Thus, the responses can be made to depend on the
236 challenges. If an invalid string is ignored, an empty string is placed in
237 the variable.
238
30dba1e6
PH
239PH/46 Messages that are created by the autoreply transport now contains a
240 References: header, in accordance with RFCs 2822 and 3834.
241
382afc6b
PH
242PH/47 Added authenticated_sender_force to the smtp transport.
243
a86229cf
PH
244PH/48 The ${prvs expansion was broken on systems where time_t was long long.
245
50c99ba6
PH
246PH/49 Installed latest patch from the Sieve maintainer.
247
d35e429d
PH
248PH/50 When an Exim quota was set without a file count quota, and mailbox_size
249 was also set, the appendfile transport was unnecessarily scanning a
250 directory of message files (e.g. for maildir delivery) to find the count
251 of files (along with the size), even though it did not need this
252 information. It now does the scan only if it needs to find either the
253 size of the count of files.
254
f90d018c
PH
255PH/51 Added ${time_eval: to convert Exim time strings into seconds.
256
75def545
PH
257PH/52 Two bugs concerned with error handling when the smtp transport is
258 used in LMTP mode:
259
260 (i) Exim was not creating retry information for temporary errors given
261 for individual recipients after the DATA command when the smtp transport
262 was used in LMTP mode. This meant that they could be retried too
263 frequently, and not timed out correctly.
264
265 (ii) Exim was setting the flag that allows error details to be returned
266 for LMTP errors on RCPT commands, but not for LMTP errors for individual
267 recipients that were returned after the DATA command.
268
269PH/53 This is related to PH/52, but is more general: for any failing address,
270 when detailed error information was permitted to be returned to the
271 sender, but the error was temporary, then after the final timeout, only
272 "retry timeout exceeded" was returned. Now it returns the full error as
273 well as "retry timeout exceeded".
274
c46782ef
PH
275PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
276 do this, and (what is worse) MTAs that accept it.
277
71fafd95
PH
278PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
279 will now be deprecated.
280
2c5db4fd
PH
281PH/56 New os.c-cygwin from the Cygwin maintainer.
282
9cf6b11a
JJ
283JJ/06 exipick: added --unsorted option to allow unsorted output in all output
284 formats (previously only available in exim formats via -bpr, -bpru,
285 and -bpra. Now also available in native and exiqgrep formats)
286
287JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
288 with very large, slow to parse queues
289
290JJ/08 exipick: added ! as generic prefix to negate any criteria format
291
292JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
293
898d150f
PH
294PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
295 responses to authentication challenges, though it was showing the
296 challenges; (ii) I've removed the CR characters from the debug output for
297 SMTP output lines.
298
46218253
PH
299PH/58 Allow for the insertion of a newline as well as a space when a string
300 is turned into more than one encoded-word during RFC 2047 encoding. The
301 Sieve code now uses this.
302
e97957bc
PH
303PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
304 data_4xx, lost_connection, tls_required.
305
81e509d7
PH
306PH/60 When a VRFY deferred or FAILED, the log message rather than the user
307 message was being sent as an SMTP response.
308
3d240ff7
PH
309PH/61 Add -l and -k options to exicyclog.
310
b37c4101
PH
311PH/62 When verifying, if an address was redirected to one new address, so that
312 verification continued, and the new address failed or deferred after
313 having set something in $address_data, the value of $address_data was not
314 passed back to the ACL. This was different to the case when no
315 redirection occurred. The value is now passed back in both cases.
316
79378e0f
PH
317PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
318 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
319 use login_cap.h, so on its own it isn't the distinguishing feature. The
320 new name refers directly to the setclassresources() function.
321
e49c7bb4
PH
322PH/65 Added configuration files for NetBSD3.
323
d114ec46
PH
324PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
325
214e2000 326
5de37277
PH
327Exim version 4.60
328-----------------
329
cc38ddbf
PH
330PH/01 Two changes to the default runtime configuration:
331
332 (1) Move the checks for relay_from_hosts and authenticated clients from
333 after to before the (commented out) DNS black list checks.
334
335 (2) Add control=submission to the relay_from_hosts and authenticated
336 clients checks, on the grounds that messages accepted by these
337 statements are most likely to be submissions.
5de37277 338
72fdd6ae
PH
339PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
340
341 (1) Generate an error if the third argument for the ${prvs expansion is
342 not a single digit.
343
344 (2) Treat a missing third argument of ${prvscheck as if it were an empty
345 string.
346
347 (3) Reset the variables that are obtained from the first argument of
348 ${prvscheck and used in the second argument before leaving the code,
349 because their memory is reclaimed, so using them afterwards may do
350 silly things.
351
352 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
353 one (it's much easier than Tom thought :-).
354
355 (5) Because of (4), we can now allow for the use of $prvscheck_result
356 inside the third argument.
cb9328de 357
cb741023
PH
358PH/03 For some reason, the default setting of PATH when running a command from
359 a pipe transport was just "/usr/bin". I have changed it to
360 "/bin:/usr/bin".
361
f174f16e
PH
362PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
363 anything to be listed in the output from -bV.
b2f5a032 364
c25242d7
PH
365PH/05 When a filter generated an autoreply, the entire To: header line was
366 quoted in the delivery log line, like this:
367
368 => >A.N.Other <ano@some.domain> <original@ddress> ...
369
370 This has been changed so that it extracts the operative address. There
371 may be more than one such address. If so, they are comma-separated, like
372 this:
373
374 => >ano@some.domain,ona@other.domain <original@ddress> ...
375
82c19f95
PH
376PH/06 When a client host used a correct literal IP address in a HELO or EHLO
377 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
378 not being looked up in the rDNS to get a host name, Exim was showing the
379 IP address twice in Received: lines, even though the IP addresses were
380 identical. For example:
381
382 Received: from [1.2.3.4] (helo=[1.2.3.4])
383
384 However, if the real host name was known, it was omitting the HELO data
385 if it matched the actual IP address. This has been tidied up so that it
386 doesn't show the same IP address twice.
387
d7ffbc12
PH
388PH/07 When both +timestamp and +memory debugging was on, the value given by
389 $tod_xxx expansions could be wrong, because the tod_stamp() function was
390 called by the debug printing, thereby overwriting the timestamp buffer.
391 Debugging no longer uses the tod_stamp() function when +timestamp is set.
392
9f526266
PH
393PH/08 When the original message was included in an autoreply transport, it
394 always said "this is a copy of the message, including all the headers",
395 even if body_only or headers_only was set. It now gives an appropriate
396 message.
397
87fcc8b9
PH
398PH/09 Applied a patch from the Sieve maintainer which:
399
400 o fixes some comments
401 o adds the (disabled) notify extension core
402 o adds some debug output for the result of if/elsif tests
403 o points to the current vacation draft in the documentation
404 and documents the missing references header update
405
406 and most important:
407
408 o fixes a bug in processing the envelope test (when testing
409 multiple envelope elements, the last element determinted the
410 result)
411
456682f5
PH
412PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
413 Electronic Mail") by including:
414
415 Auto-submitted: auto-generated
416
417 in the messages that it generates (bounce messages and others, such as
418 warnings). In the case of bounce messages for non-SMTP mesages, there was
419 also a typo: it was using "Auto_submitted" (underscore instead of
420 hyphen). Since every message generated by Exim is necessarily in response
421 to another message, thes have all been changed to:
422
423 Auto-Submitted: auto-replied
424
425 in accordance with these statements in the RFC:
426
427 The auto-replied keyword:
428
429 - SHOULD be used on messages sent in direct response to another
430 message by an automatic process,
431
432 - MUST NOT be used on manually-generated messages,
433
434 - MAY be used on Delivery Status Notifications (DSNs) and Message
435 Disposition Notifications (MDNs),
436
437 - MUST NOT be used on messages generated by automatic or periodic
438 processes, except for messages which are automatic responses to
439 other messages.
440
3e46c1aa
PH
441PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
442 to the default Received: header definition.
456682f5 443
49826d12
PH
444PH/12 Added log selector acl_warn_skipped (default on).
445
eba0c039
PH
446PH/13 After a successful wildlsearch lookup, discard the values of numeric
447 variables because (a) they are in the wrong storage pool and (b) even if
448 they were copied, it wouldn't work properly because of the caching.
449
a0d6ba8a
PH
450PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
451 checking when decoding. Apparently there are clients that generate
452 overlong encoded strings. Why am I not surprised?
453
f0917727
PH
454PH/15 If the first argument of "${if match_address" was not empty, but did not
455 contain an "@" character, Exim crashed. Now it writes a panic log message
456 and treats the condition as false.
457
096fee00
PH
458PH/16 In autoreply, treat an empty string for "once" the same as unset.
459
024bd3c2
PH
460PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
461 extension "envelope-auth". The code is finished and in agreement with
462 other implementations, but there is no documentation so far and in fact,
463 nobody wrote the draft yet. This extension is currently #undef'ed, thus
464 not changing the active code.
465
466 Print executed "if" and "elsif" statements when debugging is used. This
467 helps a great deal to understand what a filter does.
468
469 Document more things not specified clearly in RFC3028. I had all this
470 sorted out, when out of a sudden new issues came to my mind. Oops."
471
df199fec
PH
472PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
473 (Bugzilla #53).
474
d27f1df3
PH
475PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
476 canonical form (as documented). However, after a host name lookup from
477 the IP address, check_host() was doing a simple string comparison with
478 addresses acquired from the DNS when checking that the found name did
479 have the original IP as one of its addresses. Since any found IPv6
480 addresses are likely to be in abbreviated form, the comparison could
481 fail. Luckily, there already exists a function for doing the comparison
482 by converting both addresses to binary, so now that is used instead of
483 the text comparison.
484
96776534
PH
485PH/20 There was another similar case to PH/19, when a complete host name was
486 given in a host list; looking up its IP address could give an abbreviated
487 form, whereas the current host's name might or might not be abbreviated.
488 The same fix has been applied.
489
5de37277 490
9a799bc0
PH
491Exim version 4.54
492-----------------
493
494PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
495 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
496 It now does.
497
99a4b039
PH
498PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
499 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
500
501PH/03 Typo: missing ".o" in src/pcre/Makefile.
502
4b233853
PH
503PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
504 header line, restrict the check to what is listed in RFCs 2369 and 2929.
505 Also, for "Auto-Submitted", treat anything other than "no" as
506 non-personal, in accordance with RFC 3834. (Previously it treated
507 anything starting "auto-" as non-personal.)
508
8857ccfd
PH
509TF/01 The control=submission/name=... option had a problem with syntax
510 errors if the name included a slash character. The /name= option
511 now slurps the rest of the string, so it can include any characters
512 but it must come last in the list of options (after /sender_retain
513 or /domain=).
514
433a2980
PH
515PH/05 Some modifications to the interface to the fake nameserver for the new
516 testing suite.
517
3e46c1aa 518
9a799bc0 519
e3a311ba
TK
520Exim version 4.53
521-----------------
522
523TK/01 Added the "success_on_redirect" address verification option. See
524 NewStuff for rationale and an example.
525
13b685f9
PH
526PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
527
395ff96d
PH
528PH/02 Patch to exigrep to allow it to work on syslog lines.
529
5b68f6e4
PH
530PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
531 fread() to skip over the body file's header line, because in Cygwin the
532 header line is locked and is inaccessible.
533
1ab52c69
PH
534PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
535 co-exist for some time) to make it clear that it is the Exim ID that is
536 referenced, not the Message-ID: header line.
537
b07e6aa3
PH
538PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
539 string_format() function, because snprintf() does not exist on all
540 operating systems.
541
254e032f
PH
542PH/06 The use of forbid_filter_existstest now also locks out the use of the
543 ${stat: expansion item.
544
3af76a81
PH
545PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
546 protocol synchronization error", to keep the pedants happy.
547
2548ba04
PH
548PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
549 well as for IRIX systems, when gcc is being used. See the host.c source
550 file for comments.
551
b6c6011d
PH
552PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
553
cf39cf57
PH
554PH/10 Named domain lists were not working if used in a queue_smtp_domains
555 setting.
556
f1513293
PH
557PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
558 transport and to the smtp transport in LMTP mode.
559
727549a4
PH
560TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
561
af46795e
PH
562PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
563 run a filter in a subprocess. This could lead to confusion in subsequent
564 lookups in the parent process. There should also be a search_tidyup() at
565 the end of the subprocess.
566
d7b47fd0
PH
567PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
568 only if the host matched helo_try_verify_hosts, which caused the
569 verification to occur when the EHLO/HELO command was issued. The ACL just
570 tested the remembered result. Now, if a previous verification attempt has
571 not happened, "verify = helo" does it there and then.
572
ee744174
JJ
573JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
574
b582ab87
PH
575TK/03 Fix log output including CR from clamd.
576
41a13e0a
PH
577PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
578 exist provoked a memory error which could cause a segfault.
579
f625cc5a
PH
580PH/15 Installed PCRE 6.2
581
582PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
583
21f7af35
PH
584PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
585 of the problem. Specifically, suggested +O2 rather than +O1 for the
586 HP-UX compiler.
587
31480e42
PH
588PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
589
2d280592
PH
590PH/20 If a delivery was routed to a non-standard port by means of an SRV
591 record, the port was not correctly logged when the outgoing_port log
592 selector was set (it logged the transort's default port).
593
7cd1141b
PH
594PH/21 Added support for host-specific ports to manualroute, queryprogram,
595 fallback_hosts, and "hosts" in the smtp transport.
596
597PH/22 If the log selector "outgoing_port" is set, the port is now also given on
598 host errors such as "Connection refused".
599
750af86e
PH
600PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
601 authentication with radiusclient 0.4.9:
602
603 - Error returned from rc_read_config was caught wrongly
604 - Username/password not passed on to radius server due to wrong length.
605
606 The presumption is that some radiusclient API changes for 4.51/PH/17
607 were not taken care of correctly. The code is still untested by me (my
608 Linux distribution still has 0.3.2 of radiusclient), but it was
609 contributed by a Radius user.
610
611PH/24 When doing a callout, the value of $domain wasn't set correctly when
612 expanding the "port" option of the smtp transport.
613
4304270b
TK
614TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
615 while reading a MIME header. Thanks to Tom Hughes for a patch.
616
750af86e
PH
617PH/24 Include config.h inside local_scan.h so that configuration settings are
618 available.
619
64ffc24f
PH
620PH/25 Make $smtp_command_argument available after all SMTP commands. This means
621 that in an ACL for RCPT (for example), you can examine exactly what was
622 received.
623
5dd9625b
PH
624PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
625 commands, but it was not correctly comparing the address with the actual
626 client host address. Thus, it would show the EHLO address in Received:
627 header lines when this was not necessary.
628
5591031b
PH
629PH/27 Added the % operator to ${eval:}.
630
ba18e66a
PH
631PH/28 Exim tries to create and chdir to its spool directory when it starts;
632 it should be ignoring failures (because with -C, for example, it has lost
633 privilege). It wasn't ignoring creation failures other than "already
634 exists".
635
9cec981f
PH
636PH/29 Added "crypteq" to the list of supported features that Exim outputs when
637 -bV or -d is used.
638
aa2b5c79
PH
639PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
640 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
641 too many continuations, the temporary file was not being removed, and the
642 return code was incorrect.
aa2b5c79 643
48a53b7f
PH
644PH/31 Missing "BOOL" in function definition in filtertest.c.
645
1c59d63b
PH
646PH/32 Applied Sieve patches from the maintainer.
647
671012da
TK
648TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
649
1509d3a8
PH
650PH/33 Added "verify = not_blind".
651
652PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
653 Local/Makefile (with some defaults set). These are used in built scripts
654 such as exicyclog, but they have never been used in the exim_install
655 script (though there are many overriding facilities there). I have
656 arranged that the exim_install script now takes note of these two
657 settings.
658
659PH/35 Installed configuration files for Dragonfly.
660
2fe1a124
PH
661PH/36 When a locally submitted message by a trusted user did not contain a
662 From: header, and the sender address was obtained from -f or from an SMTP
663 MAIL command, and the trusted user did not use -F to supply a sender
664 name, $originator_name was incorrectly used when constructing a From:
665 header. Furthermore, $originator_name was used for submission mode
666 messages from external hosts without From: headers in a similar way,
667 which is clearly wrong.
668
8800895a
PH
669PH/37 Added control=suppress_local_fixups.
670
ccfdb010
PH
671PH/38 When log_selector = +received_sender was set, and the addition of the
672 sender made the log line's construction buffer exactly full, or one byte
673 less than full, an overflow happened when the terminating "\n" was
674 subsequently added.
675
1130bfb0
PH
676PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
677 when the result of a list match is failure because a DNS lookup failed.
678
ebcb507f
PH
679PH/40 RM_COMMAND is now used in the building process.
680
c35e155c
PH
681PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
682 the "build-* directories that it finds.
683
95d1f782
PH
684PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
685 address in a domain literal was a prefix of an interface address.
686
fd6de02e
PH
687PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
688 when verifying a sender address, unless rewrite_headers is false.
689
58de37c5
PH
690PH/44 Wrote a long comment about why errors_to addresses are verified as
691 recipients, not senders.
692
261cf466
TF
693TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
694 the ratelimit ACL was added.
695
3ee512ff
PH
696PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
697
e08c430f
PH
698PH/46 Added extra information about PostgreSQL errors to the error string.
699
bef5a11f
PH
700PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
701 avoiding the need to install special zones in a real server. This is
702 backwards compatible; if it can't find the fake resolver, it drops back.
703 Thus, both old and new test suites can be run.
704
7546de58
TF
705TF/02 Added util/ratelimit.pl
706
e5d5a95f
TF
707TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
708 clock is set back in time.
709
2e88a017
TF
710TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
711 Candler <B.Candler@pobox.com>.
712
a5f65aa4
TF
713TF/05 The fix for PH/43 was not completely correct; widen_domains is always
714 OK for addresses that are the result of redirections.
715
e7726cbf
PH
716PH/48 A number of further additions for the benefit of the new test suite,
717 including a fake gethostbyname() that interfaces to the fake DNS resolver
718 (see PH/47 above).
719
a7fdad5b
TF
720TF/06 The fix for widen_domains has also been applied to qualify_single and
721 search_parents which are the other dnslookup options that can cause
722 header rewrites.
723
6af56900
PH
724PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
725 type ("H").
726
0925ede6
PH
727PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
728
66afa403
TF
729TF/07 Exim produced the error message "an SRV record indicated no SMTP
730 service" if it encountered an MX record with an empty target hostname.
731 The message is now "an MX or SRV record indicated no SMTP service".
732
0154e85a
TF
733TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
734 if the DNS of the sending site is misconfigured. This is quite a
735 common situation. This change restores the behaviour of treating a
736 helo verification defer as a failure.
737
16f12c76
PH
738PH/51 If self=fail was set on a router, the bounce message did not include the
739 actual error message.
740
bbe902f0 741
e5a9dba6
PH
742Exim version 4.52
743-----------------
744
745TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
746
22c3b60b
PH
747PH/01 When a transport filter timed out in a pipe delivery, and the pipe
748 command itself ended in error, the underlying message about the transport
749 filter timeout was being overwritten with the pipe command error. Now the
750 underlying error message should be appended to the second error message.
751
06a9b4b5
PH
752TK/01 Fix poll() being unavailable on Mac OSX 10.2.
753
c1ac6996
PH
754PH/02 Reduce the amount of output that "make" produces by default. Full output
755 can still be requested.
756
9c7a242c
PH
757PH/03 The warning log line about a condition test deferring for a "warn" verb
758 was being output only once per connection, rather than after each
759 occurrence (because it was using the same function as for successful
760 "warn" verbs). This seems wrong, so I have changed it.
761
87ba3f5f
PH
762TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
763 it should not have, which might have caused a crash in the right
764 circumstances, but probably never did.
765
766PH/04 Installed a modified version of Tony Finch's patch to make submission
767 mode fix the return path as well as the Sender: header line, and to
768 add a /name= option so that you can make the user's friendly name appear
769 in the header line.
770
29aba418
TF
771TF/03 Added the control = fakedefer ACL modifier.
772
fe0dab11
TF
773TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
774 Mark Lowes for thorough testing.
870f6ba8 775
11d337a4
TK
776TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
777
778TK/03 Merged latest SRS patch from Miles Wilton.
779
415c8f3b
PH
780PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
781 with the definition in sysexits.h (which is #included earlier).
782 Fortunately, Exim does not actually use EX_OK. The code used to try to
783 preserve the sysexits.h value, by assumimg that macro definitions were
784 scanned for macro replacements. I have been disabused of this notion,
785 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 786
958541e9
PH
787PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
788 in the smtp transport. When a block could not be written in a single
789 write() function, the timeout was being re-applied to each part-write.
790 This seems wrong - if the receiver was accepting one byte at a time it
791 would take for ever. The timeout is now adjusted when this happens. It
792 doesn't have to be particularly precise.
793
c206415f
TK
794TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
795 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
796
2a4be8f9
PH
797PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
798 without a domain if the check to <postmaster@domain> fails.
799
1cba11c5
SC
800SC/01 Eximstats: added -xls and the ability to specify output files
801 (patch written by Frank Heydlauf).
802
803SC/02 Eximstats: use FileHandles for outputing results.
804
805SC/03 Eximstats: allow any combination of xls, txt, and html output.
806
807SC/04 Eximstats: fixed display of large numbers with -nvr option
808
809SC/05 Eximstats: fixed merging of reports with empty tables.
810
811SC/06 Eximstats: added the -include_original_destination flag
812
813SC/07 Eximstats: removed tabs and trailing whitespace.
814
1005d00e
TK
815TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
816
817TK/06 MBOX spool code: Add real "From " MBOX separator line
818 so the .eml file is really in mbox format (even though
819 most programs do not really care). Patch from Alex Miller.
820
821TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
822 The latter is generated from $received_to and is only set if the
823 message has one envelope recipient. SA can use these headers,
824 obviously out-of-the-box. Patch from Alex Miller.
825
9b4768fa
PH
826PH/08 The ${def test on a variable was returning false if the variable's
827 value was "0", contrary to what the specification has always said!
828 The result should be true unless the variable is empty.
829
830PH/09 The syntax error of a character other than { following "${if
831 def:variable_name" (after optional whitespace) was not being diagnosed.
832 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
833 accidental colon was present, for example, could give incorrect results.
834
0d7eb84a
PH
835PH/10 Tidied the code in a number of places where the st_size field of a stat()
836 result is used (not including appendfile, where other changes are about
837 to be made).
838
839PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
840 This involved changing a lot of size variables from int to off_t. It
841 should work with maildirs and everything.
842
40727bee
TK
843TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
844 spamd dying while we are connected to it.
845
554d2369
TF
846TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
847 <jgh@wizmail.org>
848
1f922db1
PH
849PH/12 Applied Alex Kiernan's patch for the API change for the error callback
850 function for BDB 4.3.
851
ef213c3b
PH
852PH/13 Changed auto_thaw such that it does not apply to bounce messages.
853
8ac170f3
PH
854PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
855 the sources for PCRE have been re-arranged and more files are now
856 involved.
857
b1c749bb
PH
858PH/15 The code I had for printing potentially long long variables in PH/11
859 above was not the best (it lost precision). The length of off_t variables
860 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
861 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
862 to be "long long int" or "long int". This is needed for the internal
863 formatting function string_vformat().
b1c749bb 864
4aac9b49
PH
865PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
866 the configuration file to be ":syslog", then the script "guesses" where
867 the logs files are, rather than using the compiled in default. In our
868 case the guess is not the same as the compiled default, so the script
869 suddenly stopped working when I started to use syslog. The patch checks
870 to see if log_file_path is "". If so, it attempts to read it from exim
871 with no configuration file to get the compiled in version, before it
872 falls back to the previous guessing code."
873
294520c8
TK
874TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
875 implementing BATV in an Exim configuration. See NewStuff for the gory
876 details.
877
5bd022fe
PH
878PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
879 Makefile that are specific to HP-UX.
880
90e9ce59
PH
881PH/18 If the "use_postmaster" option was set for a recipient callout together
882 with the "random" option, the postmaster address was used as the MAIL
883 FROM address for the random test, but not for the subsequent recipient
884 test. It is now used for both.
885
5ea81592
PH
886PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
887 patch removes a few documentation additions to RFC 3028, because the
888 latest draft now contains them. It adds the new en;ascii-case comparator
889 and a new error check for 8bit text in MIME parts. Comparator and
890 require names are now matched exactly. I enabled the subaddress
891 extension, but it is not well tested yet (read: it works for me)."
892
c6c2dc1d
PH
893PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
894 rework some of the code of TK/09 above to avoid the hardwired use of
895 "%lld" and "long long". Replaced the call to snprintf() with a call to
896 string_vformat().
897
fffffe4c
PH
898PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
899 records point to non-existent hosts", "retry timeout exceeded", and
900 "retry time not reached for any host after a long failure period".
ca02eafb 901
9a26b6b2
PH
902PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
903 experimental DomainKeys support:
904
905 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
906 (2) On an error such as an illegally used "control", the wrong name for
907 the control was given.
908
909 These problems did NOT occur unless DomainKeys support was compiled.
910
4aee0225
PH
911PH/23 Added daemon_startup_retries and daemon_startup_sleep.
912
32d668a5
PH
913PH/24 Added ${if match_ip condition.
914
8187c3f3
PH
915PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
916 databases so that it will be absolutely obvious if a crash occurs in the
917 DB library. This is a regular occurrence (often caused by mis-matched
918 db.h files).
919
ff790e47 920PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
921 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
922 picked up on a user's system that detects such things. There doesn't seem
923 to be a gcc warning option for this - only an attribute that has to be
924 put on the function's prototype. It seems that in Fedora Core 4 they have
925 set this on a number of new functions. No doubt there will be more in due
926 course.
ff790e47 927
5417f6d1
PH
928PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
929 specify a transport. However, if an address that was verified by such a
930 router was the subject of a callout, Exim crashed because it tried to
931 read the rcpt_include_affixes from the non-existent transport. Now it
932 just assumes that the setting of that option is false. This bug was
933 introduced by 4.51/PH/31.
934
59cf8544
PH
935PH/28 Changed -d+all to exclude +memory, because that information is very
936 rarely of interest, but it makes the output a lot bigger. People tend to
937 do -d+all out of habit.
938
e7ad8a65
PH
939PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
940 code in os-type was giving problems when libc.so lives in lib64, like on
941 x86_64 Fedora Core.
942
ade42478
PH
943PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
944 aren't the modern standard, and it seems that some systems' include files
945 don't always have them. Exim was already checking for some of the newer
946 ones like T_AAAA, and defining it itself. I've added checks for all the
947 record types that Exim uses.
948
182ad5cf
PH
949PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
950 not automatically generating a new one, as it is supposed to. This
951 prevented TLS from working. If the file did exist, but contained invalid
952 data, a new version was generated, as expected. It was only the case of a
953 non-existent file that was broken.
954
b0d9fc80
TK
955TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
956 with a change in libdomainkeys > 0.64.
957
958TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
959 from DNS. If the selector record carries the flag, it now has
960 precedence over the domain-wide flag.
961
962TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
963
47c7a64a
PH
964PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
965 the use of a port name that isn't defined in /etc/services) occurred, the
966 message was deferred as in a normal delivery, and thus remained on the
967 spool, instead of being failed because of the mua_wrapper setting. This
968 is now fixed, and I tidied up some of the mua_wrapper messages at the
969 same time.
970
a388bce4
SC
971SC/08 Eximstats: whilst parsing the mainlog(s), store information about
972 the messages in a hash of arrays rather than using individual hashes.
973 This is a bit cleaner and results in dramatic memory savings, albeit
974 at a slight CPU cost.
975
976SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
977 as requested by Marc Sherman.
978
979SC/10 Eximstats: added histograms for user specified patterns as requested
980 by Marc Sherman.
981
0793e4ed
SC
982SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
983
c58b88df
PH
984PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
985 fopen() in the content-scanning modules that did not already have it.
986
e7ad8a65 987
7982096b
PH
988Exim version 4.51
989-----------------
990
1a46a8c5
PH
991TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
992 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
993
2f079f46 994TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
995
996TK/03 Fix ACL "regex" condition not being available in MIME ACL.
997
998PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
999 to test Sieve filters that use "vacation".
1000
1001PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1002 that changes the way the GnuTLS parameters are stored in the cache file.
1003 The new format can be generated externally. For backward compatibility,
1004 if the data in the cache doesn't make sense, Exim assumes it has read an
1005 old-format file, and it generates new data and writes a new file. This
1006 means that you can't go back to an older release without removing the
1007 file.
1008
1009PH/03 A redirect router that has both "unseen" and "one_time" set does not
1010 work if there are any delivery delays because "one_time" forces the
1011 parent to be marked "delivered", so its unseen clone is never tried
1012 again. For this reason, Exim now forbids the simultaneous setting of
1013 these two options.
1014
1015PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1016 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1017 entry if you want to know the details. The fix, however, neglected to
1018 consider the case when local delivery batching is involved. The test for
1019 "previously delivered" was not happening when checking to see if an
1020 address could be batched with a previous (undelivered) one; under
1021 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1022 address.
1a46a8c5
PH
1023
1024PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1025 in its include files, and this causes problems building Exim.
1026
1027PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1028 header_syntax) but Exim was just ignoring anything given after a slash.
1029 In particular, this caused confusion with an attempt to use "verify =
1030 reverse_host_lookup/defer_ok". An error is now given when options are
1031 supplied for verify items that do not have them. (Maybe reverse_host_
1032 lookup should have a defer_ok option, but that's a different point.)
1033
1034PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1035 defined by RFC 821) to 2048, because there were problems with some AUTH
1036 commands, and RFC 1869 says the size should be increased for extended
1037 SMTP commands that take arguments.
1038
1039PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1040 Finch).
1041
1042PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1043 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1044
49c2d5ea
PH
1045PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1046 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1047 whatever). Otherwise the password may appear in the log. Following change
1048 PH/42 below, there is no longer a chance of it appearing in a bounce
1049 message.
49c2d5ea 1050
bf759a8b
PH
1051PH/11 Installed exipick version 20050225.0 from John Jetmore.
1052
83364d30
PH
1053PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1054 of its addresses was ever tried. (Bugzilla bug #2.)
1055
7999bbd7
PH
1056PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1057 the result incorrectly in the debug output. (It correctly added a newline
1058 to what was transported.)
1059
7dbf77c9
PH
1060TF/01 Added $received_time.
1061
74e0617f
PH
1062PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1063 commented out examples of how to interface to a virus scanner and to
1064 SpamAssassin. Also added commented examples of av_scanner and
1065 spamd_address settings.
1066
2f079f46
PH
1067PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1068 and controls are allowed in which ACLs. There were a couple of minor
1069 errors. Some of the entries in the conditions table (which is a table of
1070 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1071 negation of where the condition IS allowed.
1072
8c841523
PH
1073PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1074
7766a4f0
PH
1075PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1076 header file does not have a version number, so I've had to invent a new
1077 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1078 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1079 radiusclient), but it was contributed by a Radius user.
1080
8b417f2c
PH
1081PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1082 files or directories, for OpenSSL.
1083
901f42cb
PH
1084PH/19 When an Exim process that is running as root has to create an Exim log
1085 file, it does so in a subprocess that runs as exim:exim so as to get the
1086 ownership right at creation (otherwise, other Exim processes might see
1087 the file with the wrong ownership). There was no test for failure of this
1088 fork() call, which would lead to the process getting stuck as it waited
1089 for a non-existent subprocess. Forks do occasionally fail when resources
1090 run out. I reviewed all the other calls to fork(); they all seem to check
1091 for failure.
1092
f9b9210e
PH
1093PH/20 When checking for unexpected SMTP input at connect time (before writing
1094 the banner), Exim was not dealing correctly with a non-positive return
1095 from the read() function. If the client had disconnected by this time,
1096 the result was a log entry for a synchronization error with an empty
1097 string after "input=" when read() returned zero. If read() returned -1
1098 (an event I could not check), uninitialized data bytes were printed.
1099 There were reports of junk text (parts of files, etc) appearing after
1100 "input=".
1101
54cdb463
PH
1102PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1103
cf00dad6
PH
1104PH/22 Added support for macro redefinition, and (re)definition in between
1105 driver and ACL definitions.
1106
acb1b346
PH
1107PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1108 forgetting to use the resulting value; it was using the unexpanded value.
1109
c5ddb310
PH
1110PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1111 hadn't been configured. The fix is from Juergen Kreileder, who
1112 understands it better than I do:
1113
1114 "Here's what I see happening with three configured cyrus_sasl
1115 authenticators configured (plain, login, cram-md5):
1116
1117 On startup auth_cyrus_sasl_init() gets called for each of these.
1118 This means three calls to sasl_listmech() without a specified mech_list.
1119 => SASL tests which mechs of all available mechs actually work
1120 => three warnings about OTP not working
1121 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1122
1123 With the patch, sasl_listmech() also gets called three times. But now
1124 SASL's mech_list option is set to the server_mech specified in the the
1125 authenticator. Or in other words, the answer from sasl_listmech()
1126 gets limited to just the mech you're testing for (which is different
1127 for each call.)
1128 => the return list contains just 'plain' or 'login', 'cram-md5' or
1129 nothing depending on the value of ob->server_mech.
1130
1131 I've just tested the patch: Authentication still works fine,
1132 unavailable mechs specified in the exim configuration are still
1133 caught, and the auth.log warnings about OTP are gone."
1134
31619da6
PH
1135PH/25 When debugging is enabled, the contents of the command line are added
1136 to the debugging output, even when log_selector=+arguments is not
1137 specified.
1138
bebaf0fc
PH
1139PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1140 answer is "GNU", and only if the return is "GNU/something" is the answer
1141 "Linux".
1142
475fe28a
PH
1143PH/27 $acl_verify_message is now set immediately after the failure of a
1144 verification in an ACL, and so is available in subsequent modifiers. In
1145 particular, the message can be preserved by coding like this:
1146
1147 warn !verify = sender
1148 set acl_m0 = $acl_verify_message
1149
1150 Previously, $acl_verify_message was set only while expanding "message"
1151 and "log_message" when a very denied access.
1152
7e8bec7a
PH
1153PH/28 Modified OS/os.c-Linux with
1154
1155 -#ifndef OS_LOAD_AVERAGE
1156 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1157
1158 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1159 nomenclature these days.)
1160
e4a89c47
PH
1161PH/29 Installed patch from the Sieve maintainer that adds the options
1162 sieve_useraddress and sieve_subaddress to the redirect router.
1163
5ca2a9a1
PH
1164PH/30 In these circumstances:
1165 . Two addresses routed to the same list of hosts;
1166 . First host does not offer TLS;
1167 . First host accepts first address;
1168 . First host gives temporary error to second address;
1169 . Second host offers TLS and a TLS session is established;
1170 . Second host accepts second address.
1171 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1172 and peerdn, if requested) that were in fact used only for the second
1173 address.
7e8bec7a 1174
c688b954
PH
1175PH/31 When doing a callout as part of verifying an address, Exim was not paying
1176 attention to any local part prefix or suffix that was matched by the
1177 router that accepted the address. It now behaves in the same way as it
1178 does for delivery: the affixes are removed from the local part unless
1179 rcpt_include_affixes is set on the transport.
1180
fed77020
PH
1181PH/32 Add the sender address, as F=<...>, to the log line when logging a
1182 timeout during the DATA phase of an incoming message.
1183
7fe1560f
PH
1184PH/33 Sieve envelope tests were broken for match types other than :is. I have
1185 applied a patch sanctioned by the Sieve maintainer.
c688b954 1186
ebb6e6d5
PH
1187PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1188 the uid or gid is negative. A case of a negative gid caused this to be
1189 noticed. The fix allows for either to be negative.
1190
9c4e8f60
PH
1191PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1192 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1193 overlooked.
1194
1195PH/36 The change PH/12 above was broken. Fixed it.
1196
d7174846
PH
1197PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1198 the grounds that routing the same address twice would always produce the
1199 same answer. This might have been true once, but it is certainly no
1200 longer true now. Routing a child address may depend on the previous
1201 routing that produced that child. Some complicated redirection strategies
1202 went wrong when messages had multiple recipients, and made Exim's
1203 behaviour dependent on the order in which the addresses were given.
1204
1205 I have moved the duplicate checking until after the routing is complete.
1206 Exim scans the addresses that are assigned to local and remote
1207 transports, and removes any duplicates. This means that more work will be
1208 done, as duplicates will always all be routed, but duplicates are
1209 presumably rare, so I don't expect this is of any significance.
1210
1211 For deliveries to pipes, files, and autoreplies, the duplicate checking
1212 still happens during the routing process, since they are not going to be
1213 routed further.
1214
cfe75fc3
PH
1215PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1216 It corrects a timeout issue with spamd. This is Ian's comment: "The
1217 background is that sometimes spamd either never reads data from a
1218 connection it has accepted, or it never writes response data. The exiscan
1219 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1220 blindly assumes that writes won't block so it may never time out."
1221
be22d70e
PH
1222PH/39 Allow G after quota size as well as K and M.
1223
0612b098
PH
1224PH/40 The value set for $authenticated_id in an authenticator may not contain
1225 binary zeroes or newlines because the value is written to log lines and
1226 to spool files. There was no check on this. Now the value is run through
1227 the string_printing() function so that such characters are converted to
1228 printable escape sequences.
1229
2e0c1448
PH
1230PH/41 $message_linecount is a new variable that contains the total number of
1231 lines in the message. Compare $body_linecount, which is the count for the
1232 body only.
1233
447d236c
PH
1234PH/42 Exim no longer gives details of delivery errors for specific addresses in
1235 bounce and delay warning messages, except in certain special cases, which
1236 are as follows:
1237
1238 (a) An SMTP error message from a remote host;
1239 (b) A message specified in a :fail: redirection;
1240 (c) A message specified in a "fail" command in a system filter;
1241 (d) A message specified in a FAIL return from the queryprogram router;
1242 (e) A message specified by the cannot_route_message router option.
1243
1244 In these cases only, Exim does include the error details in bounce and
1245 warning messages. There are also a few cases where bland messages such
1246 as "unrouteable address" or "local delivery error" are given.
1247
d20976dc
PH
1248PH/43 $value is now also set for the "else" part of a ${run expansion.
1249
f656d135
PH
1250PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1251 being worked on, but at least Exim now implements the latest version to
1252 play with."
1253
2e2a30b4
PH
1254PH/45 In a pipe transport, although a timeout while waiting for the pipe
1255 process to complete was treated as a delivery failure, a timeout while
1256 writing the message to the pipe was logged, but erroneously treated as a
1257 successful delivery. Such timeouts include transport filter timeouts. For
1258 consistency with the overall process timeout, these timeouts are now
1259 treated as errors, giving rise to delivery failures by default. However,
1260 there is now a new Boolean option for the pipe transport called
1261 timeout_defer, which, if set TRUE, converts the failures into defers for
1262 both kinds of timeout. A transport filter timeout is now identified in
1263 the log output.
1264
9176e9f0
PH
1265PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1266 systems where "make" and "gmake" are different, calling "gmake" at top
1267 level broke things. I've arranged for the value of $(MAKE) to be passed
1268 from the Makefile to this script so that it can call the same version of
1269 "make".
1270
7982096b 1271
bbe902f0
PH
1272A note about Exim versions 4.44 and 4.50
1273----------------------------------------
1274
1275Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1276changes of various kinds. As a consequence, a big documentation update was
1277needed. This delayed the release for rather longer than seemed good, especially
1278in the light of a couple of (minor) security issues. Therefore, the changes
1279that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1280release. So 4.44 and 4.50 are in effect two different branches that both start
1281from 4.43.
1282
1283I have left the 4.50 change log unchanged; it contains all the changes since
12844.43. The change log for 4.44 is below; many of its items are identical to
1285those for 4.50. This seems to be the most sensible way to preserve the
1286historical information.
1287
1288
f7b63901 1289Exim version 4.50
495ae4b0
PH
1290-----------------
1291
5fe762f6
PH
1292 1. Minor wording change to the doc/README.SIEVE file.
1293
139059f6 1294 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1295 computation of the current number of files was incorrect.
495ae4b0 1296
7086e875
PH
1297 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1298 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1299 place.
1300
35af9f61
PH
1301 4. Give more explanation in the error message when the command for a transport
1302 filter fails to execute.
1303
b668c215
PH
1304 5. There are several places where Exim runs a non-Exim command in a
1305 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1306 was being done only for the command run by the queryprogram router. It is
1307 now done for all such subprocesses. The other cases are: ${run, transport
1308 filters, and the commands run by the lmtp and pipe transports.
1309
a494b1e1
PH
1310 6. Added CONFIGURE_GROUP build-time option.
1311
1312 7. Some older OS have a limit of 256 on the maximum number of file
1313 descriptors. Exim was using setrlimit() to set 1000 as a large value
1314 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1315 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1316
c5fcb476
PH
1317 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1318 was an oversight, and furthermore, ever since the addition of extra
1319 controls (e.g. 4.43/32), the checks on when to allow different forms of
1320 "control" were broken. There should now be diagnostics for all cases when a
1321 control that does not make sense is encountered.
1322
69358f02
PH
1323 9. Added the /retain_sender option to "control=submission".
1324
5be20824
PH
132510. $recipients is now available in the predata ACL (oversight).
1326
eb2c0248
PH
132711. Tidy the search cache before the fork to do a delivery from a message
1328 received from the command line. Otherwise the child will trigger a lookup
1329 failure and thereby defer the delivery if it tries to use (for example) a
1330 cached ldap connection that the parent has called unbind on.
1331
2a3eea10
PH
133212. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1333 of $address_data from the recipient verification was clobbered by the
1334 sender verification.
1335
133613. The value of address_data from a sender verification is now available in
1337 $sender_address_data in subsequent conditions in the ACL statement.
1338
23c7ff99
PH
133914. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1340
4deaf07d
PH
134115. Added a new option "connect=<time>" to callout options, to set a different
1342 connection timeout.
1343
926e1192
PH
134416. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1345 was its contents. (It was OK if the option was not defined at all.)
1346
650edc6f
PH
134717. A "Completed" log line is now written for messages that are removed from
1348 the spool by the -Mrm option.
1349
2c7db3f5
PH
135018. New variables $sender_verify_failure and $recipient_verify_failure contain
1351 information about exactly what failed.
1352
3d235903
PH
135319. Added -dd to debug only the daemon process.
1354
7c7ad977
PH
135520. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1356 handles timeouts, both on the server side and network timeouts. Renamed the
1357 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1358
981756db
PH
135921. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1360 It is now set to "smtps".
1361
d4eb88df
PH
136222. $host_address is now set to the target address during the checking of
1363 ignore_target_hosts.
1364
136523. When checking ignore_target_hosts for an ipliteral router, no host name was
1366 being passed; this would have caused $sender_host_name to have been used if
1367 matching the list had actually called for a host name (not very likely,
1368 since this list is usually IP addresses). A host name is now passed as
1369 "[x.x.x.x]".
1370
7d468ab8
PH
137124. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1372 code that specifies a non-restarting handler (typically sigaction() in
1373 modern systems) in an attempt to fix a rare and obscure crash bug.
1374
137525. Narrowed the window for a race in the daemon that could cause it to ignore
1376 SIGCHLD signals. This is not a major problem, because they are used only to
1377 wake it up if nothing else does.
1378
62c0818f
PH
137926. A malformed maildirsize file could cause Exim to calculate negative values
1380 for the mailbox size or file count. Odd effects could occur as a result.
1381 The maildirsize information is now recalculated if the size or filecount
1382 end up negative.
1383
26034054
PH
138427. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1385 support for a long time. Removed HAVE_SYS_VFS_H.
1386
af66f652
PH
138728. Installed the latest version of exipick from John Jetmore.
1388
90af77f4
PH
138929. In an address list, if the pattern was not a regular expression, an empty
1390 subject address (from a bounce message) matched only if the pattern was an
1391 empty string. Non-empty patterns were not even tested. This was the wrong
1392 because it is perfectly reasonable to use an empty address as part of a
1393 database query. An empty address is now tested by patterns that are
1394 lookups. However, all the other forms of pattern expect the subject to
1395 contain a local part and a domain, and therefore, for them, an empty
1396 address still always fails if the pattern is not itself empty.
1397
d8ef3577
PH
139830. Exim went into a mad DNS loop when attempting to do a callout where the
1399 host was specified on an smtp transport, and looking it up yielded more
1400 than one IP address.
1401
5cb8cbc6
PH
140231. Re-factored the code for checking spool and log partition space into a
1403 function that finds that data and another that does the check. The former
1404 is then used to implement four new variables: $spool_space, $log_space,
1405 $spool_inodes, and $log_inodes.
1406
14702f5b
PH
140732. The RFC2047 encoding function was originally intended for short strings
1408 such as real names; it was not keeping to the 75-character limit for
1409 encoded words that the RFC imposes. It now respects the limit, and
1410 generates multiple encoded words if necessary. To be on the safe side, I
1411 have increased the buffer size for the ${rfc2047: expansion operator from
1412 1024 to 2048 bytes.
1413
063b1e99
PH
141433. It is now permitted to omit both strings after an "if" condition; if the
1415 condition is true, the result is "true". As before, when the second string
1416 is omitted, a false condition yields an empty string. This makes it less
1417 cumbersome to write custom ACL and router conditions.
1418
652e1b65
PH
141934. Failure to deliver a bounce message always caused it to be frozen, even if
1420 there was an errors_to setting on the router. The errors_to setting is now
1421 respected.
1422
6f0c9a4f
PH
142335. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1424 canonical form (fully expanded) before being placed in
1425 $sender_host_address.
1426
33397d19
PH
142736. The table in the code that translates DNS record types into text (T_A to
1428 "A" for instance) was missing entries for NS and CNAME. It is just possible
1429 that this could have caused confusion if both these types were looked up
1430 for the same domain, because the text type is used as part of Exim's
1431 per-process caching. But the chance of anyone hitting this buglet seems
1432 very small.
1433
7bb56e1f
PH
143437. The dnsdb lookup has been extended in a number of ways.
1435
1436 (1) There is a new type, "zns", which walks up the domain tree until it
1437 finds some nameserver records. It should be used with care.
1438
ea3bc19b
PH
1439 (2) There is a new type, "mxh", which is like "mx" except that it returns
1440 just the host names, not the priorities.
1441
1442 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1443 looked up. The behaviour when one of the lookups defers can be
1444 controlled by a keyword.
7bb56e1f 1445
ea3bc19b 1446 (4) It is now possible to specify the separator character for use when
7bb56e1f 1447 multiple records are returned.
33397d19 1448
0bcb2a0e
PH
144938. The dnslists ACL condition has been extended: it is now possible to supply
1450 a list of IP addresses and/or domains to be looked up in a particular DNS
1451 domain.
1452
2ac0e484
PH
145339. Added log_selector=+queue_time_overall.
1454
4e1fde53
PH
145540. When running the queue in the test harness, wait just a tad after forking a
1456 delivery process, to get repeatability of debugging output.
1457
de365ded
PH
145841. Include certificate and key file names in error message when GnuTLS fails
1459 to set them up, because the GnuTLS error message doesn't include the name
1460 of the failing file when there is a problem reading it.
1461
f05da2e8
PH
146242. Allow both -bf and -bF in the same test run.
1463
d6453af2
PH
146443. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1465
f7b63901
PH
146644. The "Exiscan patch" is now merged into the mainline Exim source.
1467
146845. Sometimes the final signoff response after QUIT could fail to get
1469 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1470 < 0 before doing a fflush(). This bug looks as though it goes back to the
1471 introduction of TLS in release 3.20, but "sometimes" must have been rare
1472 because the tests only now provoked it.
1473
a444213a
PH
147446. Reset the locale to "C" after calling embedded Perl, in case it was changed
1475 (this can affect the format of dates).
1476
0ec020ea
PH
147747. exim_tidydb, when checking for the continued existence of a message for
1478 which it has found a message-specific retry record, was not finding
1479 messages that were in split spool directories. Consequently, it was
1480 deleting retry records that should have stayed in existence.
1481
b1206957
PH
148248. Steve fixed some bugs in eximstats.
1483
148449. The SPA authentication driver was not abandoning authentication and moving
1485 on to the next authenticator when an expansion was forced to fail,
1486 contradicting the general specification for all authenticators. Instead it
1487 was generating a temporary error. It now behaves as specified.
1488
26dd5a95
PH
148950. The default ordering of permitted cipher suites for GnuTLS was pessimal
1490 (the order specifies the preference for clients). The order is now AES256,
1491 AES128, 3DES, ARCFOUR128.
1492
343b2385
PH
149351. Small patch to Sieve code - explicitly set From: when generating an
1494 autoreply.
1495
1c5466b9
PH
149652. Exim crashed if a remote delivery caused a very long error message to be
1497 recorded - for instance if somebody sent an entire SpamAssassin report back
1498 as a large number of 550 error lines. This bug was coincidentally fixed by
1499 increasing the size of one of Exim's internal buffers (big_buffer) that
1500 happened as part of the Exiscan merge. However, to be on the safe side, I
1501 have made the code more robust (and fixed the comments that describe what
1502 is going on).
1503
55ee9ee3
PH
150453. Now that there can be additional text after "Completed" in log lines (if
1505 the queue_time_overall log selector is set), a one-byte patch to exigrep
1506 was needed to allow it to recognize "Completed" as not the last thing in
1507 the line.
1508
d38f8232
PH
150954. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1510 patch that reportedly fixes this has been added. I am not expert enough to
1511 create a test for it. This is what the patch creator wrote:
1512
1513 "I found a little strange behaviour of ldap code when working with
1514 Windows 2003 AD Domain, where users was placed in more than one
1515 Organization Units. When I tried to give exim partial DN, the exit code
1516 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1517 But simultaneously result of request was absolutely normal ldap result,
1518 so I produce this patch..."
1519
3295e65b
PH
1520 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1521 REFERENCE, so I have modified the code to exclude the patch when that macro
1522 is not defined.
1523
7102e136
PH
152455. Some experimental protocols are using DNS PTR records for new purposes. The
1525 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1526 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1527 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1528 CAN-2005-0021
7102e136 1529
3ca0ba97
PH
153056. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1531
c2bcbe20
PH
153257. Double the size of the debug message buffer (to 2048) so that more of very
1533 long debug lines gets shown.
1534
18ce445d
PH
153558. The exicyclog utility now does better if the number of log files to keep
1536 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1537
1f5b4c3d
PH
153859. Two changes related to the smtp_active_hostname option:
1539
1540 (1) $smtp_active_hostname is now available as a variable.
1541 (2) The default for smtp_banner uses $smtp_active_hostname instead
1542 of $primary_hostname.
1543
b975ba52
PH
154460. The host_aton() function is supposed to be passed a string that is known
1545 to be a valid IP address. However, in the case of IPv6 addresses, it was
1546 not checking this. This is a hostage to fortune. Exim now panics and dies
1547 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1548 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1549 components; fortuitously, this particular loophole had already been fixed
1550 by change 4.50/55 above.
1551
1552 If there are any other similar loopholes, the new check in host_aton()
1553 itself should stop them being exploited. The report I received stated that
1554 data on the command line could provoke the exploit when Exim was running as
1555 exim, but did not say which command line option was involved. All I could
1556 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1557 running as the user.
ea3a6f44 1558 CAN-2005-0021
85b87bc2
PH
1559
156061. There was a buffer overflow vulnerability in the SPA authentication code
1561 (which came originally from the Samba project). I have added a test to the
1562 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1563 CAN-2005-0022
b975ba52 1564
17ffcae7
PH
156562. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1566 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1567
d95f9fdb
PH
156863. The daemon start-up calls getloadavg() while still root for those OS that
1569 need the first call to be done as root, but it missed one case: when
1570 deliver_queue_load_max is set with deliver_drop_privilege. This is
1571 necessary for the benefit of the queue runner, because there is no re-exec
1572 when deliver_drop_privilege is set.
1573
86b8287f
PH
157464. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1575 This has been fixed.
1576
60dc5e56
PH
157765. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1578 was in use, was not putting the data itself into the right store pool;
1579 consequently, it could be overwritten for a subsequent message in the same
1580 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1581 the caching.)
1582
533244af
PH
158366. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1584
a5a28604
PH
158567. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1586 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1587 the function were treating the return as a boolean value, which happened to
1588 work because 0=false and not-0=true, but is not correct code.
1589
7e634d24
PH
159068. The host_aton() function was not handling scoped IPv6 addresses (those
1591 with, for example, "%eth0" on the end) correctly.
1592
3e11c26b
PH
159369. Fixed some compiler warnings in acl.c for the bitmaps specified with
1594 negated items (that is, ~something) in unsigned ints. Some compilers
1595 apparently mutter when there is no cast.
1596
6729cf78
PH
159770. If an address verification called from an ACL failed, and did not produce a
1598 user-specific message (i.e. there was only a "system" message), nothing was
1599 put in $acl_verify_message. In this situation, it now puts the system
1600 message there.
1601
00f00ca5
PH
160271. Change 4.23/11 added synchronization checking at the start of an SMTP
1603 session; change 4.31/43 added the unwanted input to the log line - except
1604 that it did not do this in the start of session case. It now does.
1605
c9bdd01c
PH
160672. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1607 This is wrong and can cause the other end to generate a synchronization
1608 error if it is another Exim or anything else that does the synchronization
1609 check. A QUIT command is no longer sent after a timeout.
1610
d43194df
PH
161173. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1612 during host lookups.
1613
fe5b5d0b
PH
161474. The defer_ok option of callout verification was not working if it was used
1615 when verifying addresses in header lines, that is, for this case:
1616
1617 verify = header_sender/callout=defer_ok
1618
76a2d7ba
PH
161975. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1620 those file descriptors could be used for SMTP connections. If anything
1621 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1622 could be sent to the SMTP client, causing chaos. The daemon now opens
1623 stdin, stdout, and stderr to /dev/null when it puts itself into the
1624 background.
1625
162676. Arrange for output from Perl's "warn" command to be written to Exim's main
1627 log by default. The user can override this with suitable Perl magic.
1628
04f7d5b9
PH
162977. The use of log_message on a "discard" ACL verb, which is supposed to add to
1630 the log message when discard triggers, was not working for the DATA ACL or
1631 for the non-SMTP ACL.
1632
bc60667e
PH
163378. Error message wording change in sieve.c.
1634
bb6e88ff
PH
163579. If smtp_accept_max_per_host was set, the number of connections could be
1636 restricted to fewer than expected, because the daemon was trying to set up
1637 a new connection before checking whether the processes handling previous
1638 connections had finished. The check for completed processes is now done
1639 earlier. On busy systems, this bug wouldn't be noticed because something
1640 else would have woken the daemon, and it would have reaped the completed
1641 process earlier.
1642
1e70f85b
PH
164380. If a message was submitted locally by a user whose login name contained one
1644 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1645 It caused a spool format error. I have fixed the spool reading code. A
1646 related problem was that the "from" clause in the Received: line became
1647 illegal because of the space(s). It is now covered by ${quote_local_part.
1648
164981. Included the latest eximstats from Steve (adds average sizes to HTML Top
1650 tables).
1651
4e01f9d6
PH
165282. Updated OS/Makefile-AIX as per message from Mike Meredith.
1653
1ee1cef2
PH
165483. Patch from Sieve maintainer to fix unterminated string problem in
1655 "vacation" handling.
1656
6e2b4ccc
PH
165784. Some minor changes to the Linux configuration files to help with other
1658 OS variants using glibc.
1659
8e669ac1
PH
166085. One more patch for Sieve to update vacation handling to latest spec.
1661
495ae4b0 1662
bbe902f0
PH
1663----------------------------------------------------
1664See the note above about the 4.44 and 4.50 releases.
1665----------------------------------------------------
1666
1667
1668Exim version 4.44
1669-----------------
1670
1671 1. Change 4.43/35 introduced a bug that caused file counts to be
1672 incorrectly computed when quota_filecount was set in an appendfile
1673 transport
1674
1675 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1676 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1677 place.
1678
1679 3. Give more explanation in the error message when the command for a transport
1680 filter fails to execute.
1681
1682 4. There are several places where Exim runs a non-Exim command in a
1683 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1684 was being done only for the command run by the queryprogram router. It is
1685 now done for all such subprocesses. The other cases are: ${run, transport
1686 filters, and the commands run by the lmtp and pipe transports.
1687
1688 5. Some older OS have a limit of 256 on the maximum number of file
1689 descriptors. Exim was using setrlimit() to set 1000 as a large value
1690 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1691 systems. I've change it so that if it can't get 1000, it tries for 256.
1692
1693 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1694 was an oversight, and furthermore, ever since the addition of extra
1695 controls (e.g. 4.43/32), the checks on when to allow different forms of
1696 "control" were broken. There should now be diagnostics for all cases when a
1697 control that does not make sense is encountered.
1698
1699 7. $recipients is now available in the predata ACL (oversight).
1700
1701 8. Tidy the search cache before the fork to do a delivery from a message
1702 received from the command line. Otherwise the child will trigger a lookup
1703 failure and thereby defer the delivery if it tries to use (for example) a
1704 cached ldap connection that the parent has called unbind on.
1705
1706 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1707 of $address_data from the recipient verification was clobbered by the
1708 sender verification.
1709
171010. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1711 was its contents. (It was OK if the option was not defined at all.)
1712
171311. A "Completed" log line is now written for messages that are removed from
1714 the spool by the -Mrm option.
1715
171612. $host_address is now set to the target address during the checking of
1717 ignore_target_hosts.
1718
171913. When checking ignore_target_hosts for an ipliteral router, no host name was
1720 being passed; this would have caused $sender_host_name to have been used if
1721 matching the list had actually called for a host name (not very likely,
1722 since this list is usually IP addresses). A host name is now passed as
1723 "[x.x.x.x]".
1724
172514. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1726 code that specifies a non-restarting handler (typically sigaction() in
1727 modern systems) in an attempt to fix a rare and obscure crash bug.
1728
172915. Narrowed the window for a race in the daemon that could cause it to ignore
1730 SIGCHLD signals. This is not a major problem, because they are used only to
1731 wake it up if nothing else does.
1732
173316. A malformed maildirsize file could cause Exim to calculate negative values
1734 for the mailbox size or file count. Odd effects could occur as a result.
1735 The maildirsize information is now recalculated if the size or filecount
1736 end up negative.
1737
173817. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1739 support for a long time. Removed HAVE_SYS_VFS_H.
1740
ea3a6f44 174118. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1742
174319. Allow an empty sender to be matched against a lookup in an address list.
1744 Previously the only cases considered were a regular expression, or an
1745 empty pattern.
1746
174720. Exim went into a mad DNS lookup loop when doing a callout where the
1748 host was specified on the transport, if the DNS lookup yielded more than
1749 one IP address.
1750
ea3a6f44
NM
175121. The RFC2047 encoding function was originally intended for short strings
1752 such as real names; it was not keeping to the 75-character limit for
1753 encoded words that the RFC imposes. It now respects the limit, and
1754 generates multiple encoded words if necessary. To be on the safe side, I
1755 have increased the buffer size for the ${rfc2047: expansion operator from
1756 1024 to 2048 bytes.
bbe902f0 1757
ea3a6f44
NM
175822. Failure to deliver a bounce message always caused it to be frozen, even if
1759 there was an errors_to setting on the router. The errors_to setting is now
1760 respected.
bbe902f0
PH
1761
176223. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1763 canonical form (fully expanded) before being placed in
1764 $sender_host_address.
1765
176624. Updated eximstats to version 1.33
1767
ea3a6f44
NM
176825. Include certificate and key file names in error message when GnuTLS fails
1769 to set them up, because the GnuTLS error message doesn't include the name
1770 of the failing file when there is a problem reading it.
bbe902f0
PH
1771
177226. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1773 As per change 25.
bbe902f0 1774
ea3a6f44
NM
177527. Reset the locale to "C" after calling embedded Perl, in case it was changed
1776 (this can affect the format of dates).
bbe902f0 1777
ea3a6f44
NM
177828. exim_tidydb, when checking for the continued existence of a message for
1779 which it has found a message-specific retry record, was not finding
1780 messages that were in split spool directories. Consequently, it was
1781 deleting retry records that should have stayed in existence.
bbe902f0
PH
1782
178329. eximstats updated to version 1.35
1784 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1785 1.35 - bugfix such that pie charts by volume are generated correctly
1786
ea3a6f44
NM
178730. The SPA authentication driver was not abandoning authentication and moving
1788 on to the next authenticator when an expansion was forced to fail,
1789 contradicting the general specification for all authenticators. Instead it
1790 was generating a temporary error. It now behaves as specified.
bbe902f0 1791
ea3a6f44
NM
179231. The default ordering of permitted cipher suites for GnuTLS was pessimal
1793 (the order specifies the preference for clients). The order is now AES256,
1794 AES128, 3DES, ARCFOUR128.
bbe902f0 1795
ea3a6f44
NM
179631. Small patch to Sieve code - explicitly set From: when generating an
1797 autoreply.
bbe902f0 1798
ea3a6f44
NM
179932. Exim crashed if a remote delivery caused a very long error message to be
1800 recorded - for instance if somebody sent an entire SpamAssassin report back
1801 as a large number of 550 error lines. This bug was coincidentally fixed by
1802 increasing the size of one of Exim's internal buffers (big_buffer) that
1803 happened as part of the Exiscan merge. However, to be on the safe side, I
1804 have made the code more robust (and fixed the comments that describe what
1805 is going on).
bbe902f0 1806
ea3a6f44
NM
180733. Some experimental protocols are using DNS PTR records for new purposes. The
1808 keys for these records are domain names, not reversed IP addresses. The
1809 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1810 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1811 CAN-2005-0021
1812
ea3a6f44
NM
181334. The host_aton() function is supposed to be passed a string that is known
1814 to be a valid IP address. However, in the case of IPv6 addresses, it was
1815 not checking this. This is a hostage to fortune. Exim now panics and dies
1816 if the condition is not met. A case was found where this could be provoked
1817 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1818 components; fortuitously, this particular loophole had already been fixed
1819 by change 4.50/55 or 4.44/33 above.
1820
1821 If there are any other similar loopholes, the new check in host_aton()
1822 itself should stop them being exploited. The report I received stated that
1823 data on the command line could provoke the exploit when Exim was running as
1824 exim, but did not say which command line option was involved. All I could
1825 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1826 running as the user.
bbe902f0
PH
1827 CAN-2005-0021
1828
ea3a6f44
NM
182935. There was a buffer overflow vulnerability in the SPA authentication code
1830 (which came originally from the Samba project). I have added a test to the
1831 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1832 CAN-2005-0022
1833
ea3a6f44
NM
183436. The daemon start-up calls getloadavg() while still root for those OS that
1835 need the first call to be done as root, but it missed one case: when
1836 deliver_queue_load_max is set with deliver_drop_privilege. This is
1837 necessary for the benefit of the queue runner, because there is no re-exec
1838 when deliver_drop_privilege is set.
bbe902f0 1839
ea3a6f44
NM
184037. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1841 was in use, was not putting the data itself into the right store pool;
1842 consequently, it could be overwritten for a subsequent message in the same
1843 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1844 the caching.)
bbe902f0 1845
ea3a6f44
NM
184638. Sometimes the final signoff response after QUIT could fail to get
1847 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1848 < 0 before doing a fflush(). This bug looks as though it goes back to the
1849 introduction of TLS in release 3.20, but "sometimes" must have been rare
1850 because the tests only now provoked it.
bbe902f0
PH
1851
1852
495ae4b0
PH
1853Exim version 4.43
1854-----------------
1855
1856 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1857 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1858 Now it returns an integer. A number of calls were still expecting a T/F
1859 return. Fortuitously, in all cases, the tests worked in OK situations,
1860 which is the norm. However, things would have gone wrong on any write
1861 failures on the smtp file descriptor. This function is used when sending
1862 messages over SMTP and also when doing verify callouts.
1863
1864 2. When Exim is called to do synchronous delivery of a locally submitted
1865 message (the -odf or -odi options), it no longer closes stderr before doing
1866 the delivery.
1867
1868 3. Implemented the mua_wrapper option.
1869
1870 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1871
1872 5. Implemented the functions header_remove(), header_testname(),
1873 header_add_at_position(), and receive_remove_recipient(), and exported them
1874 to local_scan().
1875
1876 6. If an ACL "warn" statement specified the addition of headers, Exim already
1877 inserted X-ACL-Warn: at the start if there was no header name. However, it
1878 was not making this test for the second and subsequent header lines if
1879 there were newlines in the string. This meant that an invalid header could
1880 be inserted if Exim was badly configured.
1881
1882 7. Allow an ACL "warn" statement to add header lines at the start or after all
1883 the Received: headers, as well as at the end.
1884
1885 8. Added the rcpt_4xx retry error code.
1886
1887 9. Added postmaster_mailfrom=xxx to callout verification option.
1888
188910. Added mailfrom=xxxx to the callout verification option, for verify=
1890 header_sender only.
1891
189211. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1893 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1894
189512. Inserted some casts to stop certain compilers warning when using pointer
1896 differences as field lengths or precisions in printf-type calls (mostly
1897 affecting debugging statements).
1898
189913. Added optional readline() support for -be (dynamically loaded).
1900
190114. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1902 same clock tick as a message's arrival, so that its received time was the
1903 same as the "first fail" time on the retry record, and that message
1904 remained on the queue past the ultimate address timeout, every queue runner
1905 would try a delivery (because it was past the ultimate address timeout) but
1906 after another failure, the ultimate address timeout, which should have then
1907 bounced the address, did not kick in. This was a "< instead of <=" error;
1908 in most cases the first failure would have been in the next clock tick
1909 after the received time, and all would be well.
1910
191115. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1912 being recognized when the domain list was tested by the match_domain
1913 condition in an expansion string.
1914
191516. Added the ${str2b64: operator.
1916
191717. Exim was always calling setrlimit() to set a large limit for the number of
1918 processes, without checking whether the existing limit was already
1919 adequate. (It did check for the limit on file descriptors.) Furthermore,
1920 errors from getrlimit() and setrlimit() were being ignored. Now they are
1921 logged to the main and panic logs, but Exim does carry on, to try to do its
1922 job under whatever limits there are.
1923
192418. Imported PCRE 5.0.
1925
192619. Trivial typo in log message " temporarily refused connection" (the leading
1927 space).
1928
192920. If the log selector return_path_on_delivery was set and an address was
1930 redirected to /dev/null, the delivery process crashed because it assumed
1931 that a return path would always be set for a "successful" delivery. In this
1932 case, the whole delivery is bypassed as an optimization, and therefore no
1933 return path is set.
1934
193521. Internal re-arrangement: the function for sending a challenge and reading
1936 a response while authentication was assuming a zero-terminated challenge
1937 string. It's now changed to take a pointer and a length, to allow for
1938 binary data in such strings.
1939
194022. Added the cyrus_sasl authenticator (code supplied by MBM).
1941
194223. Exim was not respecting finduser_retries when seeking the login of the
1943 uid under which it was called; it was always trying 10 times. (The default
1944 setting of finduser_retries is zero.) Also, it was sleeping after the final
1945 failure, which is pointless.
1946
194724. Implemented tls_on_connect_ports.
1948
194925. Implemented acl_smtp_predata.
1950
195126. If the domain in control=submission is set empty, Exim assumes that the
1952 authenticated id is a complete email address when it generates From: or
1953 Sender: header lines.
1954
195527. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1956 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1957 chown and chgrp in /bin and hostname in /usr/bin.
1958
195928. Exim was keeping the "process log" file open after each use, just as it
1960 does for the main log. This opens the possibility of it remaining open for
1961 long periods when the USR1 signal hits a daemon. Occasional processlog
1962 errors were reported, that could have been caused by this. Anyway, it seems
1963 much more sensible not to leave this file open at all, so that is what now
1964 happens.
1965
196629. The long-running daemon process does not normally write to the log once it
1967 has entered its main loop, and it closes the log before doing so. This is
1968 so that log files can straightforwardly be renamed and moved. However,
1969 there are a couple of unusual error situations where the daemon does write
1970 log entries, and I had neglected to close the log afterwards.
1971
197230. The text of an SMTP error response that was received during a remote
1973 delivery was being truncated at 512 bytes. This is too short for some of
1974 the long messages that one sometimes sees. I've increased the limit to
1975 1024.
1976
197731. It is now possible to make retry rules that apply only when a message has a
1978 specific sender, in particular, an empty sender.
1979
198032. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1981 it possible to be selective about when SMTP synchronization is enforced.
1982
198333. Added "control = caseful_local_part" and "control = "caselower_local_part".
1984
198532. Implemented hosts_connection_nolog.
1986
198733. Added an ACL for QUIT.
1988
198934. Setting "delay_warning=" to disable warnings was not working; it gave a
1990 syntax error.
1991
199235. Added mailbox_size and mailbox_filecount to appendfile.
1993
199436. Added control = no_multiline_responses to ACLs.
1995
199637. There was a bug in the logic of the code that waits for the clock to tick
1997 in the case where the clock went backwards by a substantial amount such
1998 that the microsecond fraction of "now" was more than the microsecond
1999 fraction of "then" (but the whole seconds number was less).
2000
200138. Added support for the libradius Radius client library this is found on
2002 FreeBSD (previously only the radiusclient library was supported).
2003
2004
2005Exim version 4.42
2006-----------------
2007
2008 1. When certain lookups returned multiple values in the form name=value, the
2009 quoting of the values was not always being done properly. Specifically:
2010 (a) If the value started with a double quote, but contained no whitespace,
2011 it was not quoted.
2012 (b) If the value contained whitespace other than a space character (i.e.
2013 tabs or newlines or carriage returns) it was not quoted.
2014 This fix has been applied to the mysql and pgsql lookups by writing a
2015 separate quoting function and calling it from the lookup code. The fix
2016 should probably also be applied to nisplus, ibase and oracle lookups, but
2017 since I cannot test any of those, I have not disturbed their existing code.
2018
2019 2. A hit in the callout cache for a specific address caused a log line with no
2020 reason for rejecting RCPT. Now it says "Previous (cached) callout
2021 verification failure".
2022
2023 3. There was an off-by-one bug in the queryprogram router. An over-long
2024 return line was truncated at 256 instead of 255 characters, thereby
2025 overflowing its buffer with the terminating zero. As well as fixing this, I
2026 have increased the buffer size to 1024 (and made a note to document this).
2027
2028 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2029 when Exim is waiting for an SMTP response from a remote server, Exim
2030 restarts its select() call on the socket, thereby resetting its timeout.
2031 This is not a problem when such interrupts are rare. Somebody set up a cron
2032 job to run exiwhat every 2 minutes, which is less than the normal select()
2033 timeout (5 or 10 minutes). This meant that the select() timeout never
2034 kicked in because it was always reset. I have fixed this by comparing the
2035 time when an interrupt arrives with the time at the start of the first call
2036 to select(). If more time than the timeout has elapsed, the interrupt is
2037 treated as a timeout.
2038
2039 5. Some internal re-factoring in preparation for the addition of Sieve
2040 extensions (by MH). In particular, the "personal" test is moved to a
2041 separate function, and given an option for scanning Cc: and Bcc: (which is
2042 not set for Exim filters).
2043
2044 6. When Exim created an email address using the login of the caller as the
2045 local part (e.g. when creating a From: or Sender: header line), it was not
2046 quoting the local part when it contained special characters such as @.
2047
2048 7. Installed new OpenBSD configuration files.
2049
2050 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2051 try to make them clearer.
2052
2053 9. Callout options, other than the timeout value, were being ignored when
2054 verifying sender addresses in header lines. For example, when using
2055
2056 verify = header_sender/callout=no_cache
2057
2058 the cache was (incorrectly) being used.
2059
206010. Added a missing instance of ${EXE} to the exim_install script; this affects
2061 only the Cygwin environment.
2062
206311. When return_path_on_delivery was set as a log selector, if different remote
2064 addresses in the same message used different return paths and parallel
2065 remote delivery occurred, the wrong values would sometimes be logged.
2066 (Whenever a remote delivery process finished, the return path value from
2067 the most recently started remote delivery process was logged.)
2068
206912. RFC 3848 specifies standard names for the "with" phrase in Received: header
2070 lines when AUTH and/or TLS are in use. This is the "received protocol"
2071 field. Exim used to use "asmtp" for authenticated SMTP, without any
2072 indication (in the protocol name) for TLS use. Now it follows the RFC and
2073 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2074 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2075 names appear in log lines as well as in Received: header lines.
2076
207713. Installed MH's patches for Sieve to add the "copy" and "vacation"
2078 extensions, and comparison tests, and to fix some bugs.
2079
208014. Changes to the "personal" filter test:
2081
2082 (1) The test was buggy in that it was just doing the equivalent of
2083 "contains" tests on header lines. For example, if a user's address was
2084 anne@some.where, the "personal" test would incorrectly be true for
2085
2086 To: susanne@some.where
2087
2088 This test is now done by extracting each address from the header in turn,
2089 and checking the entire address. Other tests that are part of "personal"
2090 are now done using regular expressions (for example, to check local parts
2091 of addresses in From: header lines).
2092
2093 (2) The list of non-personal local parts in From: addresses has been
2094 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2095 taken from the Sieve specification recommendations.
2096
2097 (3) If the message contains any header line starting with "List-" it is
2098 treated as non-personal.
2099
2100 (4) The test for "circular" in the Subject: header line has been removed
2101 because it now seems ill-conceived.
2102
210315. Minor typos in src/EDITME comments corrected.
2104
210516. Installed latest exipick from John Jetmore.
2106
210717. If headers_add on a router specified a text string that was too long for
2108 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2109 of string_sprintf() is now avoided.
2110
211118. $message_body_size was not set (it was always zero) when running the DATA
2112 ACL and the local_scan() function.
2113
211419. For the "mail" command in an Exim filter, no default was being set for
2115 the once_repeat time, causing a random time value to be used if "once" was
2116 specified. (If the value happened to be <= 0, no repeat happened.) The
2117 default is now 0s, meaning "never repeat". The "vacation" command was OK
2118 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2119 (I found it when inspecting the code).
2120
212120. There is now an overall timeout for performing a callout verification. It
2122 defaults to 4 times the callout timeout, which applies to individual SMTP
2123 commands during the callout. The overall timeout applies when there is more
2124 than one host that can be tried. The timeout is checked before trying the
2125 next host. This prevents very long delays if there are a large number of
2126 hosts and all are timing out (e.g. when the network connections are timing
2127 out). The value of the overall timeout can be changed by specifying an
2128 additional sub-option for "callout", called "maxwait". For example:
2129
2130 verify = sender/callout=5s,maxwait=20s
2131
213221. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2133 to the end before writing, but this should make it even safer).
2134
213522. Exim was forgetting that it had advertised PIPELINING for the second and
2136 subsequent messages on an SMTP connection. It was also not resetting its
2137 memory on STARTTLS and an internal HELO.
2138
213923. When Exim logs an SMTP synchronization error within a session, it now
2140 records whether PIPELINING has been advertised or not.
2141
214224. Added 3 instances of "(long int)" casts to time_t variables that were being
2143 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2144 rather than long int.
2145
214625. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2147
214826. Added the never_mail option to autoreply.
2149
2150
2151Exim version 4.41
2152-----------------
2153
2154 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2155 crash if the getsockname() call failed; this can happen if a connection is
2156 closed very soon after it is established. The problem was simply in the
2157 order in which certain operations were done, causing Exim to try to write
2158 to the SMTP stream before it had set up the file descriptor. The bug has
2159 been fixed by making things happen in the correct order.
2160
2161
2162Exim version 4.40
2163-----------------
2164
2165 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2166 before the connection was closed, thus losing the rejection response.
2167
2168 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2169 some early Solaris releases, but causes trouble in current releases where
2170 socklen_t is defined.
2171
2172 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2173 always exist.
2174
2175 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2176 configured.
2177
2178 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2179 that releasing the top of it at the end releases what was used for sub-
2180 expansions (unless the block got too big). However, discard this block if
2181 the first thing is a variable or header, so that we can use its block when
2182 it is dynamic (useful for very large $message_headers, for example).
2183
2184 6. Lookups now cache *every* query, not just the most recent. A new, separate
2185 store pool is used for this. It can be recovered when all lookup caches are
2186 flushed. Lookups now release memory at the end of their result strings.
2187 This has involved some general refactoring of the lookup sources.
2188
2189 7. Some code has been added to the store_xxx() functions to reduce the amount
2190 of flapping under certain conditions.
2191
2192 8. log_incoming_interface used to affect only the <= reception log lines. Now
2193 it causes the local interface and port to be added to several more SMTP log
2194 lines, for example "SMTP connection from", and rejection lines.
2195
2196 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2197
219810. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2199
220011. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2201 could be overwritten at the end of the current message (or the start of a
2202 new message if it was set in a HELO ACL). The value is now preserved for
2203 the duration of the SMTP connection.
2204
220512. If a transport had a headers_rewrite setting, and a matching header line
2206 contained an unqualified address, that address was qualified, even if it
2207 did not match any rewriting rules. The underlying bug was that the values
2208 of the flags that permit the existence of unqualified sender and recipient
2209 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2210 non-local messages, and by -bnq for local messages) were not being
2211 preserved with the message after it was received.
2212
221313. When Exim was logging an SMTP synchronization error, it could sometimes log
2214 "next input=" as part of the text comprising the host identity instead of
2215 the correct text. The code was using the same buffer for two different
2216 strings. However, depending on which order the printing function evaluated
2217 its arguments, the bug did not always show up. Under Linux, for example, my
2218 test suite worked just fine.
2219
222014. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2221 doesn't work with some older versions of Perl. It has been changed to "my",
2222 which in any case is probably the better facility to use.
2223
222415. A really picky compiler found some instances of statements for creating
2225 error messages that either had too many or two few arguments for the format
2226 string.
2227
222816. The size of the buffer for calls to the DNS resolver has been increased
2229 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2230 for addresses that have a lot of PTR records. This alleviates a problem; it
2231 does not fully solve it.
2232
223317. A dnsdb lookup for PTR records that receives more data than will fit in the
2234 buffer now truncates the list and logs the incident, which is the same
2235 action as happens when Exim is looking up a host name and its aliases.
2236 Previously in this situation something unpredictable would happen;
2237 sometimes it was "internal error: store_reset failed".
2238
223918. If a server dropped the connection unexpectedly when an Exim client was
2240 using GnuTLS and trying to read a response, the client delivery process
2241 crashed while trying to generate an error log message.
2242
224319. If a "warn" verb in an ACL added multiple headers to a message in a single
2244 string, for example:
2245
2246 warn message = H1: something\nH2: something
2247
2248 the text was added as a single header line from Exim's point of view
2249 though it ended up OK in the delivered message. However, searching for the
2250 second and subsequent header lines using $h_h2: did not work. This has been
2251 fixed. Similarly, if a system filter added multiple headers in this way,
2252 the routers could not see them.
2253
225420. Expanded the error message when iplsearch is called with an invalid key to
2255 suggest using net-iplsearch in a host list.
2256
225721. When running tests using -bh, any delays imposed by "delay" modifiers in
2258 ACLs are no longer actually imposed (and a message to that effect is
2259 output).
2260
226122. If a "gecos" field in a passwd entry contained escaped characters, in
2262 particular, if it contained a \" sequence, Exim got it wrong when building
2263 a From: or a Sender: header from that name. A second bug also caused
2264 incorrect handling when an unquoted " was present following a character
2265 that needed quoting.
2266
226723. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2268 was not being matched caselessly.
2269
227024. Arranged for all hyphens in the exim.8 source to be escaped with
2271 backslashes.
2272
227325. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2274 properly. Recipient callout cache records were still being keyed to include
2275 the sender, even when use_sender was set false. This led to far more
2276 callouts that were necessary. The sender is no longer included in the key
2277 when use_sender is false.
2278
227926. Added "control = submission" modifier to ACLs.
2280
228127. Added the ${base62d: operator to decode base 62 numbers.
2282
228328. dnsdb lookups can now access SRV records.
2284
228529. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2286 the configuration file.
2287
228830. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2289 (-v) mode. This makes the output for a verbose queue run more intelligible.
2290
229131. Added a use_postmaster feature to recipient callouts.
2292
229332. Added the $body_zerocount variable, containing the number of binary zero
2294 bytes in the message body.
2295
229633. The time of last modification of the "new" subdirectory is now used as the
2297 "mailbox time last read" when there is a quota error for a maildir
2298 delivery.
2299
230034. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2301
230235. Added +ignore_unknown as a special item in host lists.
2303
230436. Code for decoding IPv6 addresses in host lists is now included, even if
2305 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2306 address was recognized as an IP address, but was then not correctly decoded
2307 into binary, causing unexpected and incorrect effects when compared with
2308 another IP address.
2309
2310
2311Exim version 4.34
2312-----------------
2313
2314 1. Very minor rewording of debugging text in manualroute to say "list of
2315 hosts" instead of "hostlist".
2316
2317 2. If verify=header_syntax was set, and a header line with an unqualified
2318 address (no domain) and a large number of spaces between the end of the
2319 name and the colon was received, the reception process suffered a buffer
2320 overflow, and (when I tested it) crashed. This was caused by some obsolete
2321 code that should have been removed. The fix is to remove it!
2322
2323 3. When running in the test harness, delay a bit after writing a bounce
2324 message to get a bit more predictability in the log output.
2325
2326 4. Added a call to search_tidyup() just before forking a reception process. In
2327 theory, someone could use a lookup in the expansion of smtp_accept_max_
2328 per_host which, without the tidyup, could leave open a database connection.
2329
2330 5. Added the variables $recipient_data and $sender_data which get set from a
2331 lookup success in an ACL "recipients" or "senders" condition, or a router
2332 "senders" option, similar to $domain_data and $local_part_data.
2333
2334 6. Moved the writing of debug_print from before to after the "senders" test
2335 for routers.
2336
2337 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2338 problems for message scanning, either using a data ACL, or using
2339 local_scan() because the Received: header was not generated till after they
2340 were called (in order to set the time as the time of reception completion).
2341 I have revised the way this works. The header is now generated after the
2342 body is received, but before the ACL or local_scan() are called. After they
2343 are run, the timestamp in the header is updated.
2344
2345
2346Exim version 4.33
2347-----------------
2348
2349 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2350 before starting a queue runner without re-exec. This happened only when
2351 deliver_drop_privilege was set or when the Exim user was set to root. The
2352 effect of the bug was that timeouts during subsequent deliveries caused
2353 crashes instead of being properly handled. The handler is now left at its
2354 default (and expected) setting.
2355
2356 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2357 message, again when deliver_drop_privilege is set or Exim is run as root.
2358 The bug described in (1) was not present in this case, but the tidying up
2359 of the other signals was missing. I have made the two cases consistent.
2360
2361 3. The ignore_target_hosts setting on a manualroute router was being ignored
2362 for hosts that were looked up using the /MX notation.
2363
2364 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2365 in domain lists.
2366
2367 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2368 operated on the sender address. After changing the $sender_address to <>
2369 for the sender address verify, Exim was re-instated it as the original
2370 (before rewriting) address, but remembering that it had rewritten it, so it
2371 wasn't rewriting it again. This bug also had the effect of breaking the
2372 sender address verification caching when the sender address was rewritten.
2373
2374 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2375 This has been changed so that if the ip literal address matches
2376 ignore_target_hosts, the router declines.
2377
2378 7. Added expansion conditions match_domain, match_address, and match_local_
2379 part (NOT match_host).
2380
2381 8. The placeholder for the Received: header didn't have a length field set.
2382
2383 9. Added code to Exim itself and to exim_lock to test for a specific race
2384 condition that could lead to file corruption when using MBX delivery. The
2385 issue is with the lockfile that is created in /tmp. If this file is removed
2386 after a process has opened it but before that process has acquired a lock,
2387 there is the potential for a second process to recreate the file and also
2388 acquire a lock. This could lead to two Exim processes writing to the file
2389 at the same time. The added code performs the same test as UW imapd; it
2390 checks after acquiring the lock that its file descriptor still refers to
2391 the same named file.
2392
239310. The buffer for building added header lines was of fixed size, 8192 bytes.
2394 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2395 when Exim is built.
2396
239711. Added the smtp_active_hostname option. If used, this will typically be made
2398 to depend on the incoming interface address. Because $interface_address is
2399 not set up until the daemon has forked a reception process, error responses
2400 that can happen earlier (such as "too many connections") no longer contain
2401 a host name.
2402
240312. If an expansion in a condition on a "warn" statement fails because a lookup
2404 defers, the "warn" statement is abandoned, and the next ACL statement is
2405 processed. Previously this caused the whole ACL to be aborted.
2406
240713. Added the iplsearch lookup type.
2408
240914. Added ident_timeout as a log selector.
2410
241115. Added tls_certificate_verified as a log selector.
2412
241316. Added a global option tls_require_ciphers (compare the smtp transport
2414 option of the same name). This controls incoming TLS connections.
2415
241617. I finally figured out how to make tls_require_ciphers do a similar thing
2417 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2418 before starting the TLS session.
2419
242018. Tabs are now shown as \t in -bP output.
2421
242219. If the log selector return_path_on_delivery was set, Exim crashed when
2423 bouncing a message because it had too many Received: header lines.
2424
242520. If two routers both had headers_remove settings, and the first one included
2426 a superfluous trailing colon, the final name in the first list and the
2427 first name in the second list were incorrectly joined into one item (with a
2428 colon in the middle).
2429
2430
2431Exim version 4.32
2432-----------------
2433
2434 1. Added -C and -D options to the exinext utility, mainly to make it easier
2435 to include in the automated testing, but these could be helpful when
2436 multiple configurations are in use.
2437
2438 2. The exinext utility was not formatting the output nicely when there was
2439 an alternate port involved in the retry record key, nor when there was a
2440 message id as well (for retries that were specific to a specific message
2441 and a specific host). It was also confused by IPv6 addresses, because of
2442 the additional colons they contain. I have fixed the IPv4 problem, and
2443 patched it up to do a reasonable job for IPv6.
2444
2445 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2446 delivery, the log line now contains "pipelined" if PIPELINING was used.
2447
2448 4. An SMTP transport process used to panic and die if the bind() call to set
2449 an explicit outgoing interface failed. This has been changed; it is now
2450 treated in the same way as a connect() failure.
2451
2452 5. A reference to $sender_host_name in the part of a conditional expansion
2453 that was being skipped was still causing a DNS lookup. This no longer
2454 occurs.
2455
2456 6. The def: expansion condition was not recognizing references to header lines
2457 that used bh_ and bheader_.
2458
2459 7. Added the _cache feature to named lists.
2460
2461 8. The code for checking quota_filecount in the appendfile transport was
2462 allowing one more file than it should have been.
2463
2464 9. For compatibility with Sendmail, the command line option
2465
2466 -prval:sval
2467
2468 is equivalent to
2469
2470 -oMr rval -oMs sval
2471
2472 and sets the incoming protocol and host name (for trusted callers). The
2473 host name and its colon can be omitted when only the protocol is to be set.
2474 Note the Exim already has two private options, -pd and -ps, that refer to
2475 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2476 "s", but I don't think that's a major issue.
2477
247810. A number of refactoring changes to the code, none of which should affect
2479 Exim's behaviour:
2480
2481 (a) The number of logging options was getting close to filling up the
2482 32-bit word that was used as a bit map. I have split them into two classes:
2483 those that are passed in the argument to log_write(), and those that are
2484 only ever tested independently outside of that function. These are now in
2485 separate 32-bit words, so there is plenty of room for expansion again.
2486 There is no change in the user interface or the logging behaviour.
2487
2488 (b) When building, for example, log lines, the code previously used a
2489 macro that called string_cat() twice, in order to add two strings. This is
2490 not really sufficiently general. Furthermore, there was one instance where
2491 it was actually wrong because one of the argument was used twice, and in
2492 one call a function was used. (As it happened, calling the function twice
2493 did not affect the overall behaviour.) The macro has been replaced by a
2494 function that can join an arbitrary number of extra strings onto a growing
2495 string.
2496
2497 (c) The code for expansion conditions now uses a table and a binary chop
2498 instead of a serial search (which was left over from when there were very
2499 few conditions). Also, it now recognizes conditions like "pam" even when
2500 the relevant support is not compiled in: a suitably worded error message is
2501 given if an attempt is made to use such a condition.
2502
250311. Added ${time_interval:xxxxx}.
2504
250512. A bug was causing one of the ddress fields not to be passed back correctly
2506 from remote delivery subprocesses. The field in question was not being
2507 subsequently used, so this caused to problems in practice.
2508
250913. Added new log selectors queue_time and deliver_time.
2510
251114. Might have fixed a bug in maildirsizefile handling that threw up
2512 "unexpected character" debug warnings, and recalculated the data
2513 unnecessarily. In any case, I expanded the warning message to give more
2514 information.
2515
251615. Added the message "Restricted characters in address" to the statements in
2517 the default ACL that block characters like @ and % in local parts.
2518
251916. Change 71 for release 4.31 proved to be much less benign that I imagined.
2520 Three changes have been made:
2521
2522 (a) There was a serious bug; a negative response to MAIL caused the whole
2523 recipient domain to be cached as invalid, thereby blocking all messages
2524 to all local parts at the same domain, from all senders. This bug has
2525 been fixed. The domain is no longer cached after a negative response to
2526 MAIL if the sender used is not empty.
2527
2528 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2529 been restored.
2530
2531 (c) A new callout option, "use_sender" has been added for people who want
2532 the modified behaviour.
2533
2534
2535Exim version 4.31
2536-----------------
2537
2538 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2539 Larry Rosenman.
2540
2541 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2542 indeed breaks things for older releases.
2543
2544 3. Added additional logging to the case where there is a problem reading data
2545 from a filter that is running in a subprocess using a pipe, in order to
2546 try to track down a specific problem.
2547
2548 4. Testing facility fudge: when running in the test harness and attempting
2549 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2550 getting "No route to host". Convert this to a timeout.
2551
2552 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2553 warning.
2554
2555 6. Some OS don't have socklen_t but use size_t instead. This affects the
2556 fifth argument of getsockopt() amongst other things. This is now
2557 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2558 can be set for individual OS. I have set it for SunOS5, OSF1, and
2559 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2560 some earlier ones do not.
2561
2562 7. Change 4.30/15 was not doing the test caselessly.
2563
2564 8. The standard form for an IPv6 address literal was being rejected by address
2565 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2566 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2567 this, as well as the form without the "IPv6" on the front (but only when
2568 address literals are enabled, of course).
2569
2570 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2571
257210. Exim crashed if a message with an empty sender address specified by -f
2573 encountered a router with an errors_to setting. This could be provoked only
2574 by a command such as
2575
2576 exim -f "" ...
2577
2578 where an empty string was supplied; "<>" did not hit this bug.
2579
258011. Installed PCRE release 4.5.
2581
258212. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2583 remained set. It is now erased.
2584
258513. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2586 times from message ids (which are base 36 rather than the normal 62).
2587
258814. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2589 were being counted as actual protocol errors, and logged if the log
2590 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2591 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2592 and DATA following a set of rejected RCPTs do not count as protocol errors.
2593 In other words, Exim assumes they were pipelined, though this may not
2594 actually be the case. Of course, in all cases the client gets an
2595 appropriate error code.
2596
259715. If a lookup fails in an ACL condition, a message about the failure may
2598 be available; it is used if testing the ACL cannot continue, because most
2599 such messages specify what the cause of the deferral is. However, some
2600 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2601 that caused an old message to be retained and used if a later statement
2602 caused a defer, replacing the real cause of the deferral.
2603
260416. If an IP address had so many PTR records that the DNS lookup buffer
2605 was not large enough to hold them, Exim could crash while trying to process
2606 the truncated data. It now detects and logs this case.
2607
260817. Further to 4.21/58, another change has been made: if (and only if) the
2609 first line of a message (the first header line) ends with CRLF, a bare LF
2610 in a subsequent header line has a space inserted after it, so as not to
2611 terminate the header.
2612
261318. Refactoring: tidied an ugly bit of code in appendfile that copied data
2614 unnecessarily, used atoi() instead of strtol(), and didn't check the
2615 termination when getting file sizes from file names by regex.
2616
261719. Completely re-implemented the support for maildirsize files, in the light
2618 of a number of problems with the previous contributed implementation
2619 (4.30/29). In particular:
2620
2621 . If the quota is zero, the maildirsize file is maintained, but no quota is
2622 imposed.
2623
2624 . If the maildir directory does not exist, it is created before any attempt
2625 to write a maildirsize file.
2626
2627 . The quota value in the file is just a cache; if the quota is changed in
2628 the transport, the new value overrides.
2629
2630 . A regular expression is available for excluding directories from the
2631 count.
2632
263320. The autoreply transport checks the characters in options that define the
2634 message's headers; it allows continued headers, but it was checking with
2635 isspace() after an embedded newline instead of explicitly looking for a
2636 space or a tab.
2637
263821. If all the "regular" hosts to which an address was routed had passed their
2639 expiry times, and had not reached their retry times, the address was
2640 bounced, even if fallback hosts were defined. Now Exim should go on to try
2641 the fallback hosts.
2642
264322. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2644 equivalent code in the SMTP transport. Some hosts send humungous responses
2645 to HELO/EHLO, more than 1024 it seems.
2646
264723. Refactoring: code in filter.c used (void *) for "any old type" but this
2648 gives compiler warnings in some environments. I've now done it "properly",
2649 using a union.
2650
265124. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2652 (because of problems with the built-in one) was declared to return uschar *
2653 instead of char *, causing compiler failure.
2654
265525. Fixed a file descriptor leak when processing alias/forward files.
2656
265726. Fixed a minor format string issue in dbfn.c.
2658
265927. Typo in exim.c: ("dmbnz" for "dbmnz").
2660
266128. If a filter file refered to $h_xxx or $message_headers, and the headers
2662 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2663 become corrupted.
2664
266529. When a sender address is verified, it is cached, to save repeating the test
2666 when there is more than one recipient in a message. However, when the
2667 verification involves a callout, it is possible for different callout
2668 options to be set for different recipients. It is too complicated to keep
2669 track of this in the cache, so now Exim always runs a verification when a
2670 callout is required, relying on the callout cache for the optimization.
2671 The overhead is duplication of the address routing, but this should not be
2672 too great.
2673
267430. Fixed a bug in callout caching. If a RCPT command caused the sender address
2675 to be verified with callout=postmaster, and the main callout worked but the
2676 postmaster check failed, the verification correctly failed. However, if a
2677 subsequent RCPT command asked for sender verification *without* the
2678 postmaster check, incorrect caching caused this verification also to fail,
2679 incorrectly.
2680
268131. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2682 it was not caching the DNS options (qualify_single, search_parents) that
2683 were used when the lookup failed. A subsequent lookup with different
2684 options therefore always gave the same answer, though there were cases
2685 where it should not have. (Example: a "domains = !$mx_any" option on a
2686 dnslookup router: the "domains" option is always processed without any
2687 widening, but the router might have qualify_single set.) Now Exim uses the
2688 cached value only when the same options are set.
2689
269032. Added John Jetmore's "exipick" utility to the distribution.
2691
269233. GnuTLS: When an attempt to start a TLS session fails for any reason other
2693 than a timeout (e.g. a certificate is required, and is not provided), an
2694 Exim server now closes the connection immediately. Previously it waited for
2695 the client to close - but if the client is SSL, it seems that they each
2696 wait for each other, leading to a delay before one of them times out.
2697
269834: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2699 maintained 0.8.x compatibility because I don't think many are using it, and
2700 it is clearly obsolete.
2701
270235. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2703 transport.
2704
270536. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2706 client certificate was expired. A simple patch fixes this, though I don't
2707 understand the full logic of why the verify callback is called multiple
2708 times.
2709
271037. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2711 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2712 which causes problems with some clients (such as the Certicom SSL Plus
2713 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2714 disables the coutermeasure allowing Eudora to connect."
2715
271638. Exim was not checking that a write() to a log file succeeded. This could
2717 lead to Bad Things if a log got too big, in particular if it hit a file
2718 size limit. Exim now panics and dies if it cannot write to a log file, just
2719 as it does if it cannot open a log file.
2720
272139. Modified OS/Makefile-Linux so that it now contains
2722
2723 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2724
2725 The two -D definitions ensure that Exim is compiled with large file
2726 support, which makes it possible to handle log files that are bigger than
2727 2^31.
2728
272940. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2730 instance) a domain was checked against a named list that involved a lookup,
2731 causing $domain_data to be set, then another domain was checked against the
2732 same list, then the first domain was re-checked, the value of $domain_data
2733 after the final check could be wrong. In particular, if the second check
2734 failed, it could be set empty. This bug probably also applied to
2735 $localpart_data.
2736
273741. The strip_trailing_dot option was not being applied to the address given
2738 with the -f command-line option.
2739
274042. The code for reading a message's header from the spool was incrementing
2741 $received_count, but never initializing it. This meant that the value was
2742 incorrect (doubled) while delivering a message in the same process in which
2743 it was received. In the most common configuration of Exim, this never
2744 happens - a fresh exec is done - but it can happen when
2745 deliver_drop_privilege is set.
2746
274743. When Exim logs an SMTP synchronization error - client data sent too soon -
2748 it now includes up to 150 characters of the unexpected data in the log
2749 line.
2750
275144. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2752 and building data strings. The size of both of these buffers was 10 000
2753 bytes - far larger than anybody would *ever* want, thought I. Needless to
2754 say, somebody hit the limit. I have increased the maximum line length to
2755 20 000 and the maximum data length of concatenated lines to 100 000. I have
2756 also fixed two bugs, because there was no checking on these buffers. Tsk,
2757 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2758 buffer is too small.
2759
276045. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2761 lsearch lookups. Now it does.
2762
276346. When parsing a route_list item in a manualroute router, a fixed-length
2764 buffer was used for the list of hosts. I made this 1024 bytes long,
2765 thinking that nobody would ever have a list of hosts that long. Wrong.
2766 Somebody had a whole pile of complicated expansion conditions, and the
2767 string was silently truncated, leading to an expansion error. It turns out
2768 that it is easier to change to an unlimited length (owing to other changes
2769 that have happened since this code was originally written) than to build
2770 structure for giving a limitation error. The length of the item that
2771 expands into the list of hosts is now unlimited.
2772
277347. The lsearch lookup could not handle data where the length of text line was
2774 more than 4095 characters. Such lines were truncated, leading to shortened
2775 data being returned. It should now handle lines of any length.
2776
277748. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2778 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2779 ACL").
2780
278149. Cosmetic tidy to scripts like exicyclog that are generated by globally
2782 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2783 no longer happens in comment lines. A list of replacements is now placed
2784 at the head of all of the source files, except those whose only change is
2785 to replace PERL_COMMAND in the very first #! line.
2786
278750. Replaced the slow insertion sort in queue.c, for sorting the list of
2788 messages on the queue, with a bottom-up merge sort, using code contributed
2789 by Michael Haardt. This should make operations like -bp somewhat faster on
2790 large queues. It won't affect queue runners, except when queue_run_in_order
2791 is set.
2792
279351. Installed eximstats 1.31 in the distribution.
2794
279552. Added support for SRV lookups to the dnslookup router.
2796
279753. If an ACL referred to $message_body or $message_body_end, the value was not
2798 reset for any messages that followed in the same SMTP session.
2799
280054. The store-handling optimization for building very long strings was not
2801 differentiating between the different store pools. I don't think this
2802 actually made any difference in practice, but I've tidied it.
2803
280455. While running the routers to verify a sender address, $sender_address
2805 was still set to the sender address. This is wrong, because when routing to
2806 send a bounce to the sender, it would be empty. Therefore, I have changed
2807 it so that, while verifying a sender address, $sender_address is set to <>.
2808 (There is no change to what happens when verifying a recipient address.)
2809
281056. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2811 target A or AAAA records (if not already returned) without resetting the
2812 qualify_single or search_parents options of the DNS resolver. These are
2813 inappropriate in this case because the targets of MX and SRV records must
2814 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2815 target that, when qualified, matched something in the local domain. These
2816 two options are now turned off when doing these lookups.
2817
281857. It seems that at least some releases of Reiserfs (which does not have the
2819 concept of a fixed number of inodes) returns zero and not -1 for the
2820 number of available inodes. This interacted badly with check_spool_inodes,
2821 which assumed that -1 was the "no such thing" setting. What I have done is
2822 to check that the total number of inodes is greater than zero before doing
2823 the test of how many are available.
2824
282558. When a "warn" ACL statement has a log_message modifier, the message is
2826 remembered, and not repeated. This is to avoid a lot of repetition when a
2827 message has many recipients that cause the same warning to be written.
2828 Howewer, Exim was preserving the list of already written lines for an
2829 entire SMTP session, which doesn't seem right. The memory is now reset if a
2830 new message is started.
2831
283259. The "rewrite" debugging flag was not showing the result of rewriting in the
2833 debugging output unless log_rewrite was also set.
2834
283560. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2836 of (int)(handle) when we know that handle contains (void *)(-1).
2837
283861. The Exim daemon panic-logs an error return when it closes the incoming
2839 connection. However "connection reset by peer" seems to be common, and
2840 isn't really an error worthy of noting specially, so that particular error
2841 is no long logged.
2842
284362. When Exim is trying to find all the local interfaces, it used to panic and
2844 die if the ioctl to get the interface flags failed. However, it seems that
2845 on at least one OS (Solaris 9) it is possible to have an interface that is
2846 included in the list of interfaces, but for which you get a failure error
2847 for this call. This happens when the interface is not "plumbed" into a
2848 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2849 failure of the "get flags" call assumes that the interface is down.
2850
285163. Added a ${eval10: operator, which assumes all numbers are decimal. This
2852 makes life easier for people who are doing arithmetic on fields extracted
2853 from dates, where you often get leading zeros that should not be
2854 interpreted as octal.
2855
285664. Added qualify_domain to the redirect router, to override the global
2857 setting.
2858
285965. If a pathologically long header line contained very many addresses (the
2860 report of this problem mentioned 10 000) and each of them was rewritten,
2861 Exim could use up a very large amount of memory. (It kept on making new
2862 copies of the header line as it rewrote, and never released the old ones.)
2863 At the expense of a bit more processing, the header rewriting function has
2864 been changed so that it no longer eats memory in this way.
2865
286666. The generation of the Received: header has been moved from the time that a
2867 message starts to be received, to the time that it finishes. The timestamp
2868 in the Received: header should now be very close to that of the <= log
2869 line. There are two side-effects of this change:
2870
2871 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2872 logged header lines no longer include the local Received: line, because
2873 it has not yet been created. The same applies to a copy of the message
2874 that is returned to a non-SMTP sender when a message is rejected.
2875
2876 (b) When a filter file is tested using -bf, no additional Received: header
2877 is added to the test message. After some thought, I decided that this
2878 is a bug fix.
2879
2880 This change does not affect the value of $received_for. It is still set
2881 after address rewriting, but before local_scan() is called.
2882
288367. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2884
288568. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2886 gave an unhelpful panic error message, and a defer error. I have managed to
2887 change this behaviour so that it now rejects any supplied certificate,
2888 which seems right, as the list of acceptable certificates is empty.
2889
289069. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2891 gave an unhelpful defer error. I have not managed to make this reject any
2892 supplied certificates, but the error message it gives is "no certificate
2893 supplied", which is not helpful.
2894
289570. exigrep's output now also includes lines that are not associated with any
2896 message, but which match the given pattern. Implemented by a patch from
2897 Martin Sluka, which also tidied up the Perl a bit.
2898
289971. Recipient callout verification, like sender verification, was using <> in
2900 the MAIL FROM command. This isn't really the right thing, since the actual
2901 sender may affect whether the remote host accepts the recipient or not. I
2902 have changed it to use the actual sender in the callout; this means that
2903 the cache record is now keyed on a recipient/sender pair, not just the
2904 recipient address. There doesn't seem to be a real danger of callout loops,
2905 since a callout by the remote host to check the sender would use <>.
2906 [SEE ABOVE: changed after hitting problems.]
2907
290872. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2909 temporary errors. However, in the case of such a code being given after
2910 the end of a data transmission (i.e. after ".") Exim was failing to write
2911 a retry record for the message. (Yes, there was some broken host that was
2912 actually sending 8xx at this point.)
2913
291473. An unknown lookup type in a host list could cause Exim to panic-die when
2915 the list was checked. (An example that provoked this was putting <; in the
2916 middle of a list instead of at the start.) If this happened during a DATA
2917 ACL check, a -D file could be left lying around. This kind of configuration
2918 error no longer causes Exim to die; instead it causes a defer errror. The
2919 incident is still logged to the main and panic logs.
2920
292174. Buglet left over from Exim 3 conversion. The message "too many messages
2922 in one connection" was written to the rejectlog but not the mainlog, except
2923 when address rewriting (yes!) was being logged.
2924
292575. Added write_rejectlog option.
2926
292776. When a system filter was run not as root (that is, when system_filter_user
2928 was set), the values of the $n variables were not being returned to the
2929 main process; thus, they were not subsequently available in the $sn
2930 variables.
2931
293277. Added +return_path_on_delivery log selector.
2933
293478. A connection timeout was being treated differently from recipients deferred
2935 when testing hosts_max_try with a message that was older than the host's
2936 retry timeout. (The host should not be counted, thus allowing all hosts to
2937 be tried at least once before bouncing.) This may have been the cause of an
2938 occasionally reported bug whereby a message would remain on the queue
2939 longer than the retry timeout, but would be bounced if a delivery was
2940 forced. I say "may" because I never totally pinned down the problem;
2941 setting up timeout/retry tests is difficult. See also the next item.
2942
294379. The ultimate address timeout was not being applied to errors that involved
2944 a combination of host plus message (for example, a timeout on a MAIL
2945 command). When an address resolved to a number of possible hosts, and they
2946 were not all tried for each delivery (e.g. because of hosts_max_try), a
2947 message could remain on the queue longer than the retry timeout.
2948
294980. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2950 Haardt.
2951
295281. Fixed an obscure SMTP outgoing bug which required at least the following
2953 conditions: (a) there was another message waiting for the same server;
2954 (b) the server returned 5xx to all RCPT commands in the first message so
2955 that the message was not completed; (c) the server dropped the connection
2956 or gave a negative response to the RSET that Exim sends to abort the
2957 transaction. The observed case was a dropped connection after DATA that had
2958 been sent in pipelining mode. That is, the server had advertised PIPELINING
2959 but was not implementing it correctly. The effect of the bug was incorrect
2960 behaviour, such as trying another host, and this could lead to a crash.
2961
2962
2963Exim version 4.30
2964-----------------
2965
2966 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2967 and daemon.c were passed as pointers to ints; they should have been
2968 pointers to socklen_t variables (which are typically unsigned ints).
2969
2970 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2971 fixed.
2972
2973 3. Fixed a really odd bug that affected only the testing scheme; patching a
2974 certain fixed string in the binary changed the value of another string that
2975 happened to be identical to the end of the original first string.
2976
2977 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2978 name", it returns that address as the IP address. On some operating
2979 systems (e.g. Solaris), it also passes back the IP address string as the
2980 "host name". However, on others (e.g. Linux), it passes back an empty
2981 string. Exim wasn't checking for this, and was changing the host name to an
2982 empty string, assuming it had been canonicized.
2983
2984 5. Although rare, it is permitted to have more than one PTR record for a given
2985 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2986 all the names associated with an address, because they do in Solaris.
2987 However, it seems that they do not in Linux for data that comes from the
2988 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2989 I found this out when I moved to a new Linux workstation and tried to run
2990 the Exim test suite.
2991
2992 To get round this problem I have changed the code so that it now does its
2993 own call to the DNS to look up PTR records when searching for a host name.
2994 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2995 addresses that are only in /etc/hosts are still found.
2996
2997 This behaviour is, however, controlled by an option called host_lookup_
2998 order, which defaults to "bydns:byaddr". If people want to use the other
2999 order, or indeed, just use one or the other means of lookup, they can
3000 specify it in this variable.
3001
3002 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3003 some operating systems, this comes back from gethostbyaddr() as an empty
3004 string, and this is what Exim used to test for. However, it seems that in
3005 other systems, "." is yielded. Exim now tests for this case too.
3006
3007 7. The values of check_spool_space and check_log_space are now held internally
3008 as a number of kilobytes instead of an absolute number of bytes. If a
3009 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3010 kilobyte. This means that much larger values can be stored.
3011
3012 8. Exim monitor: an attempt to get the action menu when not actually pointing
3013 at a message produces an empty menu entitled "No message selected". This
3014 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3015 no entries in it ("Shell widget menu has zero width and/or height"). So I
3016 have added a single, blank menu entry in this case.
3017
3018 9. Added ${quote_local_part.
3019
302010. MIME decoding is now applied to the contents of Subject: header lines when
3021 they are logged.
3022
302311. Now that a reference to $sender_host_address automatically causes a reverse
3024 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3025 host lookup before query-style lookups in lists that might use this
3026 variable. This has therefore been abolished, and the "net-" prefix is no
3027 longer necessary for query-style lookups.
3028
302912. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3030 have been a typo for LFLAGS, so it has been changed.
3031
303213. The install script calls Exim with "-C /dev/null" in order to find the
3033 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3034 to be output. Howeve, since Exim outputs its version number before the
3035 error, it didn't break the script. It just looked ugly. I fixed this by
3036 always allowing "-C /dev/null" if the caller is root.
3037
303814. Ignore overlarge ACL variable number when reading spool file - insurance
3039 against a later release with more variables having written the file.
3040
304115. The standard form for an IPv6 address literal was being rejected by EHLO.
3042 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3043 this, as well as the form without the "IPv6" on the front.
3044
304516. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3046 OS/Makefile-Darwin file.
3047
304817. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3049 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3050
305118. After change 4.21/52, "%ld" was used to format the contents of the $inode
3052 variable. However, some OS use ints for inodes. I've added cast to long int
3053 to get rid of the compiler warning.
3054
305519. I had forgotten to lock out "/../" in configuration file names when
3056 ALT_CONFIG_PREFIX was set.
3057
305820. Routers used for verification do not need to specify transports. However,
3059 if such a router generated a host list, and callout was configured, Exim
3060 crashed, because it could not find a port number from the (non-existent)
3061 transport. It now assumes port 25 in this circumstance.
3062
306321. Added the -t option to exigrep.
3064
306522. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3066 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3067 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3068 them is set, LOOKUP_LSEARCH is forced.
3069
307023. "exim -bV" now outputs a list of lookups that are included in the binary.
3071
307224. Added sender and host information to the "rejected by local_scan()" log
3073 line; previously there was no indication of these.
3074
307525. Added .include_if_exists.
3076
307726. Change 3.952/11 added an explicit directory sync on top of a file sync for
3078 Linux. It turns out that not all file systems support this. Apparently some
3079 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3080 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3081 not supported on the file descriptor, is now ignored when Exim is trying to
3082 sync a directory. This applies only to Linux.
3083
308427. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3085
308628. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3087 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3088 this.
3089
309029. Added support for maildirsize files from supplied patch (modified a bit).
3091
309230. The use of :fail: followed by an empty string could lead Exim to respond to
3093 sender verification failures with (e.g.):
3094
3095 550 Verification failed for <xxx>
3096 550 Sender verify failed
3097
3098 where the first response line was missing the '-' that indicates it is not
3099 the final line of the response.
3100
310131. The loop for finding the name of the user that called Exim had a hardwired
3102 limit of 10; it now uses the value of finduser_retries, which is used for
3103 all other user lookups.
3104
310532. Added $received_count variable, available in data and not_smtp ACLs, and at
3106 delivery time.
3107
310833. Exim was neglecting to zero errno before one call of strtol() when
3109 expanding a string and expecting an integer value. On some systems this
3110 resulted in spurious "integer overflow" errors. Also, it was casting the
3111 result into an int without checking.
3112
311334. Testing for a connection timeout using "timeout_connect" in the retry rules
3114 did not work. The code looks as if it has *never* worked, though it appears
3115 to have been documented since at least releast 1.62. I have made it work.
3116
311735. The "timeout_DNS" error in retry rules, also documented since at least
3118 1.62, also never worked. As it isn't clear exactly what this means, and
3119 clearly it isn't a major issue, I have abolished the feature by treating it
3120 as "timeout", and writing a warning to the main and panic logs.
3121
312236. The display of retry rules for -brt wasn't always showing the error code
3123 correctly.
3124
312537. Added new error conditions to retry rules: timeout_A, timeout_MX,
3126 timeout_connect_A, timeout_connect_MX.
3127
312838. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3129 to the empty sender.
3130
313139. The daemon was not analysing the content of -oX till after it had closed
3132 stderr and disconnected from the controlling terminal. This meant that any
3133 syntax errors were only noted on the panic log, and the return code from
3134 the command was 0. By re-arranging the code a little, I've made the
3135 decoding happen first, so such errors now appear on stderr, and the return
3136 code is 1. However, the actual setting up of the sockets still happens in
3137 the disconnected process, so errors there are still only recorded on the
3138 panic log.
3139
314040. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3141 connections (as happens on some IP stacks) was logged at start up time as
3142 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3143 it from "IPv6 and IPv4", which means that two separate sockets are being
3144 used.
3145
314641. The debug output for gethostbyname2() or getipnodebyname() failures now
3147 says whether AF_INET or AF_INET6 was passed as an argument.
3148
314942. Exiwhat output was messed up when time zones were included in log
3150 timestamps.
3151
315243. Exiwhat now gives more information about the daemon's listening ports,
3153 and whether -tls-on-connect was used.
3154
315544. The "port" option of the smtp transport is now expanded.
3156
315745. A "message" modifier in a "warn" statement in a non-message ACL was being
3158 silently ignored. Now an error message is written to the main and panic
3159 logs.
3160
316146. There's a new ACL modifier called "logwrite" which writes to a log file
3162 as soon as it is encountered.
3163
316447. Added $local_user_uid and $local_user_gid at routing time.
3165
316648. Exim crashed when trying to verify a sender address that was being
3167 rewritten to "<>".
3168
316949. Exim was recognizing only a space character after ".include". It now also
3170 recognizes a tab character.
3171
317250. Fixed several bugs in the Perl script that creates the exim.8 man page by
3173 extracting the relevant information from the specification. The man page no
3174 longer contains scrambled data for the -d option, and I've added a section
3175 at the front about calling Exim under different names.
3176
317751. Added "extra_headers" argument to the "mail" command in filter files.
3178
317952. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3180 crash.
3181
318253. Installed eximstats 1.29.
3183
318454. Added transport_filter_timeout as a generic transport option.
3185
318655. Exim no longer adds an empty Bcc: header to messages that have no To: or
3187 Cc: header lines. This was required by RFC 822, but it not required by RFC
3188 2822.
3189
319056. Exim used to add From:, Date:, and Message-Id: header lines to any
3191 incoming messages that did not have them. Now it does so only if the
3192 message originates locally, that is, if there is no associated remote host
3193 address. When Resent- header lines are present, this applies to the Resent-
3194 lines rather than the non-Resent- lines.
3195
319657. Drop incoming SMTP connection after too many syntax or protocol errors. The
3197 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3198
319958. Messages for configuration errors now include the name of the main
3200 configuration file - useful now that there may be more than one file in a
3201 list (.included file names were always shown).
3202
320359. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3204 for those rare installations that do not start the daemon as root or run it
3205 setuid root. I've cut out the call to initgroups() if the daemon is not
3206 root at that time.
3207
320860. The Exim user and group can now be bound into the binary as text strings
3209 that are looked up at the start of Exim's processing.
3210
321161. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3212
321362. Added $mailstore_basename variable.
3214
321563. Installed patch to sieve.c from Michael Haardt.
3216
321764. When Exim failed to open the panic log after failing to open the main log,
3218 the original message it was trying to log was written to stderr and debug
3219 output, but if they were not available (the usual case in production), it
3220 was lost. Now it is written to syslog before the two lines that record the
3221 failures to open the logs.
3222
322365. Users' Exim filters run in subprocesses under the user's uid. It is
3224 possible for a "deliver" command or an alias in a "personal" command to
3225 provoke an address rewrite. If logging of address rewriting is configured,
3226 this fails because the process is not running as root or exim. There may be
3227 a better way of dealing with this, but for the moment (because 4.30 needs
3228 to be released), I have disabled address rewrite logging when running a
3229 filter in a non-root, non-exim process.
3230
3231
3232Exim version 4.24
3233-----------------
3234
3235 1. The buildconfig auxiliary program wasn't quoting the value set for
3236 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3237 not defined. This bug was masked in 4.22 by the effect that was fixed in
3238 change 4.23/1.
3239
3240 2. Some messages that were rejected after a message id was allocated were
3241 shown as "incomplete" by exigrep. It no longer does this for messages that
3242 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3243
3244 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3245 have allow_domain_literals set, the ID did not get logged in the <= line.
3246 Domain literals are now always recognized in Message-ID: header lines.
3247
3248 4. The first argument for a ${extract expansion item is the key name or field
3249 number. Leading and trailing spaces in this item were not being ignored,
3250 causing some misleading effects.
3251
3252 5. When deliver_drop_privilege was set, single queue runner processes started
3253 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3254 same command in the process it spins off) were not dropping privilege.
3255
3256 6. When the daemon running as "exim" started a queue runner, it always
3257 re-executed Exim in the spun-off process. This is a waste of effort when
3258 deliver_drop_privilege is set. The new process now just calls the
3259 queue-runner function directly.
3260
3261
3262Exim version 4.23
3263-----------------
3264
3265 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3266 HEADERS_CHARSET.
3267
3268 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3269 ignored. Though the use of -oP was forcing the writing of a pid file, it
3270 was always written to the default place.
3271
3272 3. If the message "no IP address found for host xxxx" is generated during
3273 incoming verification, it is now followed by identification of the incoming
3274 connection (so you can more easily find what provoked it).
3275
3276 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3277
3278 5. Added some features to "harden" Exim a bit more against certain attacks:
3279
3280 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3281 be put in Local/Makefile. This is like the never_users runtime option,
3282 but it cannot be overridden. The default setting is "root".
3283
3284 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3285 prefix string with which any file named in a -C command line option
3286 must start.
3287
3288 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3289 is retained for -C and -D only if the caller of Exim is root. Without
3290 it, the exim user may also use -C and -D and retain privilege.
3291
3292 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3293 command line option is disabled.
3294
3295 6. Macro names set by the -D option must start with an upper case letter, just
3296 like macro names defined in the configuration file.
3297
3298 7. Added "dereference=" facility to LDAP.
3299
3300 8. Two instances of the typo "uknown" in the source files are fixed.
3301
3302 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3303 the Configure-Makefile script screwed up while processing it.
3304
330510. Incorporated PCRE 4.4.
3306
330711. The SMTP synchronization check was not operating right at the start of an
3308 SMTP session. For example, it could not catch a HELO sent before the client
3309 waited for the greeting. There is now a check for outstanding input at the
3310 point when the greeting is written. Because of the duplex, asynchronous
3311 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3312 way, but not yet received, when the check is performed.
3313
331412. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3315 on TCP/IP sockets, because this apparently causes some broken clients to
3316 timeout.
3317
331813. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3319 unchanged) from the Cygwin maintainer.
3320
332114. The code for -bV that shows what is in the binary showed "mbx" when maildir
3322 was supported instead of testing for mbx. Effectively a typo.
3323
332415. The spa authenticator server code was not checking that the input it
3325 received was valid base64.
3326
332716. The debug output line for the "set" modifier in ACLs was not showing the
3328 name of the variable that was being set.
3329
333017. Code tidy: the variable type "vtype_string" was never used. Removed it.
3331
333218. Previously, a reference to $sender_host_name did not cause a DNS reverse
3333 lookup on its own. Something else was needed to trigger the lookup. For
3334 example, a match in host_lookup or the need for a host name in a host list.
3335 Now, if $sender_host_name is referenced and the host name has not yet been
3336 looked up, a lookup is performed. If the lookup fails, the variable remains
3337 empty, and $host_lookup_failed is set to "1".
3338
333919. Added "eqi" as a case-independent comparison operator.
3340
334120. The saslauthd authentication condition could segfault if neither service
3342 nor realm was specified.
3343
334421. If an overflowing value such as "2048M" was set for message_size_limit, the
3345 error message that was logged was misleading, and incoming SMTP
3346 connections were dropped. The message is now more accurate, and temporary
3347 errors are given to SMTP connections.
3348
334922. In some error situations (such as 21 above) Exim rejects all SMTP commands
3350 (except RSET) with a 421 error, until QUIT is received. However, it was
3351 failing to send a response to QUIT.
3352
335323. The HELO ACL was being run before the code for helo_try_verify_hosts,
3354 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3355 ACL is now run after the helo_try_verify_hosts code.
3356
335724. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3358 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3359 case-independent, so other case variants are also recognized). Apparently
3360 some systems use these upper case variants.
3361
336225. If more than two messages were waiting for the same host, and a transport
3363 filter was specified for the transport, Exim sent two messages over the
3364 same TCP/IP connection, and then failed with "socket operation on non-
3365 socket" when it tried to send the third.
3366
336726. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3368
336927. The extern definition of crypt16() in expand.c was not being excluded when
3370 the OS had its own crypt16() function.
3371
337228. Added bounce_return_body as a new option, and bounce_return_size_limit
3373 as a preferred synonym for return_size_limit, both as an option and as an
3374 expansion variable.
3375
337629. Added LIBS=-liconv to OS/Makefile-OSF1.
3377
337830. Changed the default configuration ACL to relax the local part checking rule
3379 for addresses that are not in any local domains. For these addresses,
3380 slashes and pipe symbols are allowed within local parts, but the sequence
3381 /../ is explicitly forbidden.
3382
338331. SPA server authentication was not clearing the challenge buffer before
3384 using it.
3385
338632. log_message in a "warn" ACL statement was writing to the reject log as
3387 well as to the main log, which contradicts the documentation and doesn't
3388 seem right (because no rejection is happening). So I have stopped it.
3389
339033. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3391 However, I am unable to do any testing of this.
3392
339334. Fixed an infelicity in the appendfile transport. When checking directories
3394 for a mailbox, to see if any needed to be created, it was accidentally
3395 using path names with one or more superfluous leading slashes; tracing
3396 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3397
339835. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3399 contents are added to the log line that is written for every discarded
3400 recipient. (Previously a log_message setting was ignored.)
3401
340236. The ${quote: operator now quotes the string if it is empty.
3403
340437. The install script runs exim in order to find its version number. If for
3405 some reason other than non-existence or emptiness, which it checks, it
3406 could not run './exim', it was installing it with an empty version number,
3407 i.e. as "exim-". This error state is now caught, and the installation is
3408 aborted.
3409
341038. An argument was missing from the function that creates an error message
3411 when Exim fails to connect to the socket for saslauthd authentication.
3412 This could cause Exim to crash, or give a corrupted message.
3413
341439. Added isip, isip4, and isip6 to ${if conditions.
3415
341640. The ACL variables $acl_xx are now saved with the message, and can be
3417 accessed later in routers, transports, and filters.
3418
341941. The new lookup type nwildlsearch is like wildlsearch, except that the key
3420 strings in the file are not string-expanded.
3421
342242. If a MAIL command specified a SIZE value that was too large to fit into an
3423 int variable, the check against message_size_limit failed. Such values are
3424 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3425 day this will have to be increased, but I don't think I want to be around
3426 when emails are that large.
3427
3428
3429
3430Exim version 4.22
3431-----------------
3432
3433 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3434 iconv() is not standard in FreeBSD.
3435
3436 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3437 IPv6 enabled. The observed symptom was a segmentation fault on return from
3438 the function os_common_find_running_interfaces() in src/os.c.
3439
3440 3. In the check_special_case() function in daemon.c I had used "errno" as an
3441 argument name, which causes warnings on some systems. This was basically a
3442 typo, since it was named "eno" in the comments!
3443
3444 4. The code that waits for the clock to tick (at a resolution of some fraction
3445 of a second) so as to ensure message-id uniqueness was always waiting for
3446 at least one whole tick, when it could have waited for less. [This is
3447 almost certainly not relevant at current processor speeds, where it is
3448 unlikely to ever wait at all. But we try to future-proof.]
3449
3450 5. The function that sleeps for a time interval that includes fractions of a
3451 second contained a race. It did not block SIGALRM between setting the
3452 timer, and suspending (a couple of lines later). If the interval was short
3453 and the sigsuspend() was delayed until after it had expired, the suspension
3454 never ended. On busy systems this could lead to processes getting stuck for
3455 ever.
3456
3457 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3458 process, before it forks any delivery processes. The open lookup caching
3459 mechanism meant that the open file or database connection was passed into
3460 the delivery process. The problem was that delivery processes always tidy
3461 up cached lookup data. This could cause a problem for the next delivery
3462 process started by the queue runner, because the external queue runner
3463 process does not know about the closure. So the next delivery process
3464 still has data in the lookup cache. In the case of a file lookup, there was
3465 no problem because closing a file descriptor in a subprocess doesn't affect
3466 the parent. However, if the lookup was caching a connection to a database,
3467 the connection was closed, and the second delivery process was likely to
3468 see errors such as "PGSQL: query failed: server closed the connection
3469 unexpectedly". The problem has been fixed by closing all cached lookups
3470 in a queue runner before running a delivery process.
3471
3472 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3473 seem to have the "const" qualifier which it has on other OS. I've
3474 parameterised it.
3475
3476 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3477 *of the same type* (client or server) with the same public name that an
3478 error should be diagnosed.
3479
3480 9. When Exim looked up a host name for an IP address, but failed to find the
3481 original IP address when looking up the host name (a safety check), it
3482 output the message "<ip address> does not match any IP for NULL", which was
3483 confusing, to say the least. The bug was that the host name should have
3484 appeared instead of "NULL".
3485
348610. Since release 3.03, if Exim is called by a uid other than root or the Exim
3487 user that is built into the binary, and the -C or -D options is used, root
3488 privilege is dropped before the configuration file is read. In addition,
3489 logging is switched to stderr instead of the normal log files. If the
3490 configuration then re-defines the Exim user, the unprivileged environment
3491 is probably not what is expected, so Exim logs a panic warning message (but
3492 proceeds).
3493
3494 However, if deliver_drop_privilege is set, the unprivileged state may well
3495 be exactly what is intended, so the warning has been cut out in that case,
3496 and Exim is allowed to try to write to its normal log files.
3497
3498
3499Exim version 4.21
3500-----------------
3501
3502 1. smtp_return_error_details was not giving details for temporary sender
3503 or receiver verification errors.
3504
3505 2. Diagnose a configuration error if two authenticators have the same public
3506 name.
3507
3508 3. Exim used not to create the message log file for a message until the first
3509 delivery attempt. This could be confusing when incoming messages were held
3510 for policy or load reasons. The message log file is now created at the time
3511 the message is received, and an initial "Received" line is written to it.
3512
3513 4. The automatically generated man page for command line options had a minor
3514 bug that caused no ill effects; however, a more serious problem was that
3515 the procedure for building the man page automatically didn't always
3516 operate. Consequently, release 4.20 contains an out-of-date version. This
3517 shouldn't happen again.
3518
3519 5. When building Exim with embedded Perl support, the script that builds the
3520 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3521 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3522
3523 6. The freeze_tell option was not being used for messages that were frozen on
3524 arrival, either by an ACL or by local_scan().
3525
3526 7. Added the smtp_incomplete_transaction log selector.
3527
3528 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3529 was accepting AUTH without a new EHLO.
3530
3531 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3532 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3533 RFC.
3534
353510. Logging of TCP/IP connections (when configured) now happens in the main
3536 daemon process instead of the child process, so that the TCP/IP connection
3537 count is more accurate (but it can never be perfect).
3538
353911. The use of "drop" in a nested ACL was not being handled correctly in the
3540 outer ACL. Now, if condition failure induced by the nested "drop" causes
3541 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3542 or "require"), the connection is dropped.
3543
354412. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3545 that yield "discard" can now be used with an "accept" or a "discard" verb,
3546 but an error is generated for any others (because I can't see a useful way
3547 to define what should happen).
3548
354913. When an ACL is read dynamically from a file (or anywhere else), the lines
3550 are now processed in the same way as lines in the Exim configuration file.
3551 In particular, continuation lines are supported.
3552
355314. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3554
355515. Added -ti meaning -t -i.
3556
355716. Check for letters, digits, hyphens, and dots in the names of dnslist
3558 domains, and warn by logging if others are found.
3559
356017. At least on BSD, alignment is not guarenteed for the array of ifreq's
3561 returned from GIFCONF when Exim is trying to find the list of interfaces on
3562 a host. The code in os.c has been modified to copy each ifreq to an aligned
3563 structure in all cases.
3564
3565 Also, in some cases, the returned ifreq's were being copied to a 'struct
3566 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3567 means the last couple of bytes of an IPv6 address could be chopped if the
3568 ifreq contained only a normal sockaddr (14 bytes storage).
3569
357018. Named domain lists were not supported in the hosts_treat_as_local option.
3571 An entry such as +xxxx was not recognized, and was treated as a literal
3572 domain name.
3573
357419. Ensure that header lines added by a DATA ACL are included in the reject log
3575 if the ACL subsequently rejects the message.
3576
357720. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3578 MD5 (which is deprecated).
3579
358021. When testing a filter file using -bf, Exim was writing a message when it
3581 took the sender from a "From " line in the message, but it was not doing so
3582 when it took $return_path from a Return-Path: header line. It now does.
3583
358422. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3585 with a valid header line field name (a series of printing characters
3586 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3587
358823. Changed "disc" in the source to "disk" to conform to the documentation and
3589 the book and for uniformity.
3590
359124. Ignore Sendmail's -Ooption=value command line item.
3592
359325. When execve() failed while trying to run a command in a pipe transport,
3594 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3595 could be confused with a return value of 69 from the command itself. This
3596 has been changed to 127, the value the shell returns if it is asked to run
3597 a non-existent command. The wording for the related log line suggests a
3598 non-existent command as the problem.
3599
360026. If received_header_text expands to an empty string, do not add a Received:
3601 header line to the message. (Well, it adds a token one on the spool, but
3602 marks it "old" so that it doesn't get used or transmitted.)
3603
360427. Installed eximstats 1.28 (addition of -nt option).
3605
360628. There was no check for failure on the call to getsockname() in the daemon
3607 code. This can fail if there is a shortage of resources on the system, with
3608 ENOMEM, for example. A temporary error is now given on failure.
3609
361029. Contrary to the C standard, it seems that in some environments, the
3611 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3612 program. Exim now does this explicitly; it affects the formatting of
3613 timestamps using strftime().
3614
361530. If exiqsumm was given junk data, it threw up some uninitialized variable
3616 complaints. I've now initialized all the variables, to avoid this.
3617
361832. Header lines added by a system filter were not being "seen" during
3619 transport-time rewrites.
3620
362133. The info_callback() function passed to OpenSSL is set up with type void
3622 (*)(SSL *, int, int), as described somewhere. However, when calling the
3623 function (actually a macro) that sets it up, the type void(*)() is
3624 expected. I've put in a cast to prevent warnings from picky compilers.
3625
362634. If a DNS black list lookup found a CNAME record, but there were no A
3627 records associated with the domain it pointed at, Exim crashed.
3628
362935. If a DNS black list lookup returned more than one A record, Exim ignored
3630 all but the first. It now scans all returned addresses if a particular IP
3631 value is being sought. In this situation, the contents of the
3632 $dnslist_value variable are a list of all the addresses, separated by a
3633 comma and a space.
3634
363536. Tightened up the rules for host name lookups using reverse DNS. Exim used
3636 to accept a host name and all its aliases if the forward lookup for any of
3637 them yielded the IP address of the incoming connection. Now it accepts only
3638 those names whose forward lookup yields the correct IP address. Any other
3639 names are discarded. This closes a loophole whereby a rogue DNS
3640 administrator could create reverse DNS records to break through a
3641 wildcarded host restriction in an ACL.
3642
364337. If a user filter or a system filter that ran in a subprocess used any of
3644 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3645 the wrong values were passed to the pipe command ($thisaddress had the
3646 value of $0, $0 had the value of $1, etc). This bug was introduced by
3647 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3648
364938. Improved the line breaking for long SMTP error messages from ACLs.
3650 Previously, if there was no break point between 40 and 75 characters, Exim
3651 left the rest of the message alone. Two changes have been made: (a) I've
3652 reduced the minimum length to 35 characters; (b) if it can't find a break
3653 point between 35 and 75 characters, it looks ahead and uses the first one
3654 that it finds. This may give the occasional overlong line, but at least the
3655 remaining text gets split now.
3656
365739. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3658 file descriptors might be low, and that setting 1000 would always raise it.
3659 It turns out that in some environments, the limit is already over 1000 and
3660 that lowering it causes trouble. So now Exim takes care not to decrease it.
3661
366240. When delivering a message, the value of $return_path is set to $sender_
3663 address at the start of routing (routers may change the value). By an
3664 oversight, this default was not being set up when an address was tested by
3665 -bt or -bv, which affected the outcome if any router or filter referred to
3666 $return_path.
3667