Call initgroups() when dropping privilege, in order that Exim runs with
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
805e5aab 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.353 2006/05/22 18:44:24 fanf2 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
478be7b0
SC
6Exim version 4.63
7-----------------
8
9SC/01 Use a glob alias rather than an array ref in eximstats generated
10 parser. This improves both readability and performance.
11
12SC/02 Collect SpamAssassin and rejection statistics in eximstats.
13 Don't display local sender or destination tables in eximstats unless
14 there is data to show.
15 Added average volumes into the eximstats top table text output.
16
17SC/03 Collect data on the number of addresses (recipients) as well
18 as the number of messages in eximstats.
19
2b965a65
TF
20TF/01 Correct an error in the documentation for the redirect router. Exim
21 does (usually) call initgroups() when daemonizing.
478be7b0 22
805e5aab
TF
23TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs with
24 consistent privilege compared to when running as a daemon.
478be7b0 25
c887c79e
TF
26Exim version 4.62
27-----------------
28
29TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
30 other effects) broke the use of negated acl sub-conditions.
31
1cce3af8
PH
32PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
33 patch).
34
afb3eaaf
PH
35PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
36 "Deny" causes Exim to reject the incoming connection with a 554 error.
37 Unfortunately, if there is a major crisis, such as a disk failure,
38 tcp-wrappers gives "deny", whereas what one would like would be some
39 kind of temporary error. A kludge has been added to help with this.
40 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
41 554 error is used if errno is still zero or contains ENOENT (which occurs
42 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
43 451 error is used.
44
e173618b
PH
45PH/03 Add -lutil to the default FreeBSD LIBS setting.
46
dd16e114
PH
47PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
48 errors. Otherwise a message that provokes a temporary error (when other
49 messages do not) can cause a whole host to time out.
50
f7fd3850
PH
51PH/05 Batch deliveries by appendfile and pipe transports did not work when the
52 addresses were routed directly to files or pipes from a redirect router.
53 File deliveries just didn't batch; pipe deliveries might have suffered
54 odd errors.
55
d87df92c
PH
56PH/06 A failure to get a lock for a hints database would erroneously always say
57 "Failed to get write lock", even when it was really a read lock.
58
7e9f683d
PH
59PH/07 The appendfile transport was creating MBX lock files with a fixed mode
60 of 0600. This has been changed to use the value of the lockfile_mode
61 option (which defaults to 0600).
62
bfad5236
PH
63PH/08 Applied small patch from the Sieve maintainer.
64
01c490df
PH
65PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
66 folder from quota calculations, a direct delivery into this folder messed
67 up the contents of the maildirsize file. This was because the regex was
68 used only to exclude .Trash (or whatever) when the size of the mailbox
69 was calculated. There was no check that a delivery was happening into an
70 excluded directory. This bug has been fixed by ignoring all quota
71 processing for deliveries into excluded directories.
72
d6629cdc
PH
73PH/10 Added the maildirfolder_create_regex option to appendfile.
74
1cce3af8 75
214e2000
PH
76Exim version 4.61
77-----------------
78
79PH/01 The code for finding all the local interface addresses on a FreeBSD
80 system running IPv6 was broken. This may well have applied to all BSD
81 systems, as well as to others that have similar system calls. The broken
82 code found IPv4 interfaces correctly, but gave incorrect values for the
83 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
84 that it would not match correctly against @[] and not recognize the IPv6
85 addresses as local.
86
f9daeae0
PH
87PH/02 The ipliteral router was not recognizing addresses of the form user@
88 [ipv6:....] because it didn't know about the "ipv6:" prefix.
89
7e66e54d
PH
90PH/03 Added disable_ipv6.
91
c8ea1597
PH
92PH/04 Changed $reply_address to use the raw form of the headers instead of the
93 decoded form, because it is most often used to construct To: headers
94 lines in autoreplies, and the decoded form may well be syntactically
95 invalid. However, $reply_address has leading white space removed, and all
96 newlines turned into spaces so that the autoreply transport does not
97 grumble.
98
911f6fde
PH
99PH/05 If group was specified without a user on a router, and no group or user
100 was specified on a transport, the group from the router was ignored.
101
47ca6d6c
PH
102PH/06 Increased the number of ACL variables to 20 of each type, and arranged
103 for visible compile-time settings that can be used to change these
104 numbers, for those that want even more. Backwards compatibility with old
105 spool files has been maintained. However, going back to a previous Exim
106 release will lost any variables that are in spool files.
107
ed0e9820
PH
108PH/07 Two small changes when running in the test harness: increase delay when
109 passing a TCP/IP connection to a new process, in case the original
110 process has to generate a bounce, and remove special handling of
111 127.0.0.2 (sic), which is no longer necessary.
112
eff37e47
PH
113PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
114 be the same on different OS.
115
1921d2ea
PH
116PH/09 Moved a debug statement in filter processing to avoid a race problem when
117 testing.
118
b3f69ca8
JJ
119JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
120 whether --show-vars was specified or not
121
122JJ/02 exipick: Added support for new ACL variable spool format introduced
123 in 4.61-PH/06
124
424a1c63
PH
125PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
126 syntactically invalid From: or Reply-to: line, and a filter used this to
127 generate an autoreply, and therefore failed to obtain an address for the
128 autoreply, Exim could try to deliver to a non-existent relative file
129 name, causing unrelated and misleading errors. What now happens is that
130 it logs this as a hard delivery error, but does not attempt to create a
131 bounce message.
132
7a100415
PH
133PH/11 The exinext utility has a -C option for testing purposes, but although
134 the given file was scanned by exinext itself; it wasn't being passed on
135 when Exim was called.
136
19b9dc85
PH
137PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
138 an end-of-file indication when reading a command response.
139
309bd837
PH
140PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
141 compiled. In many other places in Exim, IPv6 addresses are always
142 recognized, so I have changed this. It also means that IPv4 domain
143 literals of the form [IPV4:n.n.n.n] are now always recognized.
144
59e82a2a
PH
145PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
146 used if the router is not running as root, for example, when verifying at
147 ACL time, or when using -bh. The debugging output from this situation was
148 non-existent - all you got was a failure to exec. I have made two
149 changes:
150
151 (a) Failures to set uid/gid, the current directory, or a process leader
152 in a subprocess such as that created by queryprogram now generate
153 suitable debugging ouput when -d is set.
154
155 (b) The queryprogram router detects when it is not running as root,
156 outputs suitable debugging information if -d is set, and then runs
157 the subprocess without attempting to change uid/gid.
158
9edc04ce
PH
159PH/15 Minor change to Makefile for building test_host (undocumented testing
160 feature).
161
1349e1e5
PH
162PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
163 additional section of a DNS packet that returns MX or SRV records.
164 Instead, it always explicitly searches for A/AAAA records. This avoids
165 major problems that occur when a DNS server includes only records of one
166 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
167 fixed another bug: if SRV records were looked up and the corresponding
168 address records were *not* found in the additional section, the port
169 values from the SRV records were lost.
170
ea49d0e1
PH
171PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
172 using the correct key (the original address) when searching the retry
173 rules in order to find which one to use for generating the retry hint.
174
064a94c9
PH
175PH/18 If quota_warn_message contains a From: header, Exim now refrains from
176 adding the default one. Similarly, if it contains a Reply-To: header, the
177 errors_reply_to option, if set, is not used.
178
727071f8
PH
179PH/19 When calculating a retry time, Exim used to measure the "time since
180 failure" by looking at the "first failed" field in the retry record. Now
181 it does not use this if it is later than than the arrival time of the
182 message. Instead it uses the arrival time. This makes for better
183 behaviour in cases where some deliveries succeed, thus re-setting the
184 "first failed" field. An example is a quota failure for a huge message
185 when small messages continue to be delivered. Without this change, the
186 "time since failure" will always be short, possible causing more frequent
187 delivery attempts for the huge message than are intended.
dd16e114 188 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 189
f78eb7c6
PH
190PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
191 $1, $2, $3) because the numerical variables can be reset during some
192 expansion items (e.g. "match"), thereby losing the authentication data.
193
21c28500
PH
194PH/21 Make -bV show the size of off_t variables so that the test suite can
195 decide whether to run tests for quotas > 2G.
196
197PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
198 mailbox_size, and mailbox_filecount in the appendfile transport. If a
199 filecount value is greater than 2G or if a quota value is greater than 2G
200 on a system where the size of off_t is not greater than 4, a panic error
201 is given.
202
1688f43b
PH
203PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
204 never match. The debug and -bh output now contains an explicit error
205 message indicating a malformed IPv4 address or mask.
206
207PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
208 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
209 PH/23 above applies.
210
9675b384
PH
211PH/25 Do not write to syslog when running in the test harness. The only
212 occasion when this arises is a failure to open the main or panic logs
213 (for which there is an explicit test).
214
6a3f1455
PH
215PH/26 Added the /no_tell option to "control=freeze".
216
dac79d3e
PH
217PH/27 If a host name lookup failed very early in a connection, for example, if
218 the IP address matched host_lookup and the reverse lookup yielded a name
219 that did not have a forward lookup, an error message of the form "no IP
220 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
221 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 222
5977a0b3
PH
223PH/28 An enabling patch from MH: add new function child_open_exim2() which
224 allows the sender and the authenticated sender to be set when
225 submitting a message from within Exim. Since child_open_exim() is
226 documented for local_scan(), the new function should be too.
227
c91535f3
PH
228PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
229 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
230 results in an empty string is now treated as unset.
231
0d46a8c8
PH
232PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
233
278c6e6c
PH
234PH/31 Added sender_verify_fail logging option.
235
2cbb4081
PH
236PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
237 needed by RFC 822 but not by RFC 2822 was commented out. I have now
238 tidied the source and removed it altogether.
239
3eef829e
PH
240PH/33 When a queue run was abandoned because the load average was too high, a
241 log line was always written; now it is written only if the queue_run log
242 selector is set. In addition, the log line for abandonment now contains
243 information about the queue run such as the pid. This is always present
244 in "start" and "stop" lines but was omitted from the "abandon" line.
245
1ab95fa6
PH
246PH/34 Omit spaces between a header name and the colon in the error message that
247 is given when verify = headers_syntax fails (if there are lots of them,
248 the message gets confusing).
249
230205fc
PH
250PH/35 Change the default for dns_check_names_pattern to allow slashes within
251 names, as there are now some PTR records that contain slashes. This check
252 is only to protect against broken name servers that fall over on strange
253 characters, so the fact that it applies to all lookups doesn't matter.
254
75e0e026
PH
255PH/36 Now that the new test suite is complete, we can remove some of the
256 special code in Exim that was needed for the old test suite. For example,
257 sorting DNS records because real resolvers return them in an arbitrary
258 order. The new test suite's fake resolver always returns records in the
259 same order.
260
261PH/37 When running in the test harness, use -odi for submitted messages (e.g.
262 bounces) except when queue_only is set, to avoid logging races between
263 the different processes.
264
145396a6
PH
265PH/38 Panic-die if .include specifies a non-absolute path.
266
3cd34f13
PH
267PH/39 A tweak to the "H" retry rule from its user.
268
11121d3d
JJ
269JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
270 a label. They prevented compilation on older perls.
271
272JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
273 a warning to be raised on newish perls.
274
275JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
276 on queue. Changes to match documented behaviour of showing count of
277 messages matching specified criteria.
278
8def5aaf
PH
279PH/40 Changed the default ident timeout from 30s to 5s.
280
929ba01c
PH
281PH/41 Added support for the use of login_cap features, on those BSD systems
282 that have them, for controlling the resources used by pipe deliveries.
283
2632889e
PH
284PH/42 The content-scanning code uses fopen() to create files in which to put
285 message data. Previously it was not paying any attention to the mode of
286 the files. Exim runs with umask(0) because the rest of the code creates
287 files with open(), and sets the required mode explicitly. Thus, these
288 files were ending up world-writeable. This was not a big issue, because,
289 being within the spool directory, they were not world-accessible. I have
290 created a function called modefopen, which takes an additional mode
291 argument. It sets umask(777), creates the file, chmods it to the required
292 mode, then resets the umask. All the relevant calls to fopen() in the
293 content scanning code have been changed to use this function.
294
944a9c55
PH
295PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
296 to 24 hours. This avoids potential overflow problems when processing G
297 and H retry rules. I suspect nobody ever tinkers with this value.
298
4a23603b
PH
299PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
300
4730f942
PH
301PH/45 When the plaintext authenticator is running as a client, the server's
302 challenges are checked to ensure they are valid base64 strings. By
303 default, the authentication attempt is cancelled if an invalid string is
304 received. Setting client_ignore_invalid_base64 true ignores these errors.
305 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
306 they are received. Thus, the responses can be made to depend on the
307 challenges. If an invalid string is ignored, an empty string is placed in
308 the variable.
309
30dba1e6
PH
310PH/46 Messages that are created by the autoreply transport now contains a
311 References: header, in accordance with RFCs 2822 and 3834.
312
382afc6b
PH
313PH/47 Added authenticated_sender_force to the smtp transport.
314
a86229cf
PH
315PH/48 The ${prvs expansion was broken on systems where time_t was long long.
316
50c99ba6
PH
317PH/49 Installed latest patch from the Sieve maintainer.
318
d35e429d
PH
319PH/50 When an Exim quota was set without a file count quota, and mailbox_size
320 was also set, the appendfile transport was unnecessarily scanning a
321 directory of message files (e.g. for maildir delivery) to find the count
322 of files (along with the size), even though it did not need this
323 information. It now does the scan only if it needs to find either the
324 size of the count of files.
325
f90d018c
PH
326PH/51 Added ${time_eval: to convert Exim time strings into seconds.
327
75def545
PH
328PH/52 Two bugs concerned with error handling when the smtp transport is
329 used in LMTP mode:
330
331 (i) Exim was not creating retry information for temporary errors given
332 for individual recipients after the DATA command when the smtp transport
333 was used in LMTP mode. This meant that they could be retried too
334 frequently, and not timed out correctly.
335
336 (ii) Exim was setting the flag that allows error details to be returned
337 for LMTP errors on RCPT commands, but not for LMTP errors for individual
338 recipients that were returned after the DATA command.
339
340PH/53 This is related to PH/52, but is more general: for any failing address,
341 when detailed error information was permitted to be returned to the
342 sender, but the error was temporary, then after the final timeout, only
343 "retry timeout exceeded" was returned. Now it returns the full error as
344 well as "retry timeout exceeded".
345
c46782ef
PH
346PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
347 do this, and (what is worse) MTAs that accept it.
348
71fafd95
PH
349PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
350 will now be deprecated.
351
2c5db4fd
PH
352PH/56 New os.c-cygwin from the Cygwin maintainer.
353
9cf6b11a
JJ
354JJ/06 exipick: added --unsorted option to allow unsorted output in all output
355 formats (previously only available in exim formats via -bpr, -bpru,
356 and -bpra. Now also available in native and exiqgrep formats)
357
358JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
359 with very large, slow to parse queues
360
361JJ/08 exipick: added ! as generic prefix to negate any criteria format
362
363JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
364
898d150f
PH
365PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
366 responses to authentication challenges, though it was showing the
367 challenges; (ii) I've removed the CR characters from the debug output for
368 SMTP output lines.
369
46218253
PH
370PH/58 Allow for the insertion of a newline as well as a space when a string
371 is turned into more than one encoded-word during RFC 2047 encoding. The
372 Sieve code now uses this.
373
e97957bc
PH
374PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
375 data_4xx, lost_connection, tls_required.
376
81e509d7
PH
377PH/60 When a VRFY deferred or FAILED, the log message rather than the user
378 message was being sent as an SMTP response.
379
3d240ff7
PH
380PH/61 Add -l and -k options to exicyclog.
381
b37c4101
PH
382PH/62 When verifying, if an address was redirected to one new address, so that
383 verification continued, and the new address failed or deferred after
384 having set something in $address_data, the value of $address_data was not
385 passed back to the ACL. This was different to the case when no
386 redirection occurred. The value is now passed back in both cases.
387
79378e0f
PH
388PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
389 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
390 use login_cap.h, so on its own it isn't the distinguishing feature. The
391 new name refers directly to the setclassresources() function.
392
e49c7bb4
PH
393PH/65 Added configuration files for NetBSD3.
394
d114ec46
PH
395PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
396
f3d7df6c
PH
397PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
398 is preferred over IPv4.
399
715ab376
PH
400PH/68 The bounce_return_message and bounce_return_body options were not being
401 honoured for bounces generated during the reception of non-SMTP messages.
402 In particular, this applied to messages rejected by the ACL. This bug has
403 been fixed. However, if bounce_return_message is true and bounce_return_
404 body is false, the headers that are returned for a non-SMTP message
405 include only those that have been read before the error was detected.
406 (In the case of an ACL rejection, they have all been read.)
407
6b31b150
PH
408PH/69 The HTML version of the specification is now built in a directory called
409 spec_html instead of spec.html, because the latter looks like a path with
410 a MIME-type, and this confuses some software.
411
412PH/70 Catch two compiler warnings in sieve.c.
413
d515a917
PH
414PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
415 function verify_get_ident() calls ip_connect() to connect a socket, but
416 if the "connect()" function timed out, ip_connect() used to close the
417 socket. However, verify_get_ident() also closes the socket later, and in
418 between Exim writes to the log, which may get opened at this point. When
419 the socket was closed in ip_connect(), the log could get the same file
420 descriptor number as the socket. This naturally causes chaos. The fix is
421 not to close the socket in ip_connect(); the socket should be closed by
422 the function that creates it. There was only one place in the code where
423 this was missing, in the iplookup router, which I don't think anybody now
424 uses, but I've fixed it anyway.
425
9b8fadde
PH
426PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
427 well as to direct DNS lookups. Otherwise the handling of names in host
428 lists is inconsistent and therefore confusing.
429
214e2000 430
5de37277
PH
431Exim version 4.60
432-----------------
433
cc38ddbf
PH
434PH/01 Two changes to the default runtime configuration:
435
436 (1) Move the checks for relay_from_hosts and authenticated clients from
437 after to before the (commented out) DNS black list checks.
438
439 (2) Add control=submission to the relay_from_hosts and authenticated
440 clients checks, on the grounds that messages accepted by these
441 statements are most likely to be submissions.
5de37277 442
72fdd6ae
PH
443PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
444
445 (1) Generate an error if the third argument for the ${prvs expansion is
446 not a single digit.
447
448 (2) Treat a missing third argument of ${prvscheck as if it were an empty
449 string.
450
451 (3) Reset the variables that are obtained from the first argument of
452 ${prvscheck and used in the second argument before leaving the code,
453 because their memory is reclaimed, so using them afterwards may do
454 silly things.
455
456 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
457 one (it's much easier than Tom thought :-).
458
459 (5) Because of (4), we can now allow for the use of $prvscheck_result
460 inside the third argument.
cb9328de 461
cb741023
PH
462PH/03 For some reason, the default setting of PATH when running a command from
463 a pipe transport was just "/usr/bin". I have changed it to
464 "/bin:/usr/bin".
465
f174f16e
PH
466PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
467 anything to be listed in the output from -bV.
b2f5a032 468
c25242d7
PH
469PH/05 When a filter generated an autoreply, the entire To: header line was
470 quoted in the delivery log line, like this:
471
472 => >A.N.Other <ano@some.domain> <original@ddress> ...
473
474 This has been changed so that it extracts the operative address. There
475 may be more than one such address. If so, they are comma-separated, like
476 this:
477
478 => >ano@some.domain,ona@other.domain <original@ddress> ...
479
82c19f95
PH
480PH/06 When a client host used a correct literal IP address in a HELO or EHLO
481 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
482 not being looked up in the rDNS to get a host name, Exim was showing the
483 IP address twice in Received: lines, even though the IP addresses were
484 identical. For example:
485
486 Received: from [1.2.3.4] (helo=[1.2.3.4])
487
488 However, if the real host name was known, it was omitting the HELO data
489 if it matched the actual IP address. This has been tidied up so that it
490 doesn't show the same IP address twice.
491
d7ffbc12
PH
492PH/07 When both +timestamp and +memory debugging was on, the value given by
493 $tod_xxx expansions could be wrong, because the tod_stamp() function was
494 called by the debug printing, thereby overwriting the timestamp buffer.
495 Debugging no longer uses the tod_stamp() function when +timestamp is set.
496
9f526266
PH
497PH/08 When the original message was included in an autoreply transport, it
498 always said "this is a copy of the message, including all the headers",
499 even if body_only or headers_only was set. It now gives an appropriate
500 message.
501
87fcc8b9
PH
502PH/09 Applied a patch from the Sieve maintainer which:
503
504 o fixes some comments
505 o adds the (disabled) notify extension core
506 o adds some debug output for the result of if/elsif tests
507 o points to the current vacation draft in the documentation
508 and documents the missing references header update
509
510 and most important:
511
512 o fixes a bug in processing the envelope test (when testing
513 multiple envelope elements, the last element determinted the
514 result)
515
456682f5
PH
516PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
517 Electronic Mail") by including:
518
519 Auto-submitted: auto-generated
520
521 in the messages that it generates (bounce messages and others, such as
522 warnings). In the case of bounce messages for non-SMTP mesages, there was
523 also a typo: it was using "Auto_submitted" (underscore instead of
524 hyphen). Since every message generated by Exim is necessarily in response
525 to another message, thes have all been changed to:
526
527 Auto-Submitted: auto-replied
528
529 in accordance with these statements in the RFC:
530
531 The auto-replied keyword:
532
533 - SHOULD be used on messages sent in direct response to another
534 message by an automatic process,
535
536 - MUST NOT be used on manually-generated messages,
537
538 - MAY be used on Delivery Status Notifications (DSNs) and Message
539 Disposition Notifications (MDNs),
540
541 - MUST NOT be used on messages generated by automatic or periodic
542 processes, except for messages which are automatic responses to
543 other messages.
544
3e46c1aa
PH
545PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
546 to the default Received: header definition.
456682f5 547
49826d12
PH
548PH/12 Added log selector acl_warn_skipped (default on).
549
eba0c039
PH
550PH/13 After a successful wildlsearch lookup, discard the values of numeric
551 variables because (a) they are in the wrong storage pool and (b) even if
552 they were copied, it wouldn't work properly because of the caching.
553
a0d6ba8a
PH
554PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
555 checking when decoding. Apparently there are clients that generate
556 overlong encoded strings. Why am I not surprised?
557
f0917727
PH
558PH/15 If the first argument of "${if match_address" was not empty, but did not
559 contain an "@" character, Exim crashed. Now it writes a panic log message
560 and treats the condition as false.
561
096fee00
PH
562PH/16 In autoreply, treat an empty string for "once" the same as unset.
563
024bd3c2
PH
564PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
565 extension "envelope-auth". The code is finished and in agreement with
566 other implementations, but there is no documentation so far and in fact,
567 nobody wrote the draft yet. This extension is currently #undef'ed, thus
568 not changing the active code.
569
570 Print executed "if" and "elsif" statements when debugging is used. This
571 helps a great deal to understand what a filter does.
572
573 Document more things not specified clearly in RFC3028. I had all this
574 sorted out, when out of a sudden new issues came to my mind. Oops."
575
df199fec
PH
576PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
577 (Bugzilla #53).
578
d27f1df3
PH
579PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
580 canonical form (as documented). However, after a host name lookup from
581 the IP address, check_host() was doing a simple string comparison with
582 addresses acquired from the DNS when checking that the found name did
583 have the original IP as one of its addresses. Since any found IPv6
584 addresses are likely to be in abbreviated form, the comparison could
585 fail. Luckily, there already exists a function for doing the comparison
586 by converting both addresses to binary, so now that is used instead of
587 the text comparison.
588
96776534
PH
589PH/20 There was another similar case to PH/19, when a complete host name was
590 given in a host list; looking up its IP address could give an abbreviated
591 form, whereas the current host's name might or might not be abbreviated.
592 The same fix has been applied.
593
5de37277 594
9a799bc0
PH
595Exim version 4.54
596-----------------
597
598PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
599 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
600 It now does.
601
99a4b039
PH
602PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
603 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
604
605PH/03 Typo: missing ".o" in src/pcre/Makefile.
606
4b233853
PH
607PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
608 header line, restrict the check to what is listed in RFCs 2369 and 2929.
609 Also, for "Auto-Submitted", treat anything other than "no" as
610 non-personal, in accordance with RFC 3834. (Previously it treated
611 anything starting "auto-" as non-personal.)
612
8857ccfd
PH
613TF/01 The control=submission/name=... option had a problem with syntax
614 errors if the name included a slash character. The /name= option
615 now slurps the rest of the string, so it can include any characters
616 but it must come last in the list of options (after /sender_retain
617 or /domain=).
618
433a2980
PH
619PH/05 Some modifications to the interface to the fake nameserver for the new
620 testing suite.
621
3e46c1aa 622
9a799bc0 623
e3a311ba
TK
624Exim version 4.53
625-----------------
626
627TK/01 Added the "success_on_redirect" address verification option. See
628 NewStuff for rationale and an example.
629
13b685f9
PH
630PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
631
395ff96d
PH
632PH/02 Patch to exigrep to allow it to work on syslog lines.
633
5b68f6e4
PH
634PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
635 fread() to skip over the body file's header line, because in Cygwin the
636 header line is locked and is inaccessible.
637
1ab52c69
PH
638PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
639 co-exist for some time) to make it clear that it is the Exim ID that is
640 referenced, not the Message-ID: header line.
641
b07e6aa3
PH
642PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
643 string_format() function, because snprintf() does not exist on all
644 operating systems.
645
254e032f
PH
646PH/06 The use of forbid_filter_existstest now also locks out the use of the
647 ${stat: expansion item.
648
3af76a81
PH
649PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
650 protocol synchronization error", to keep the pedants happy.
651
2548ba04
PH
652PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
653 well as for IRIX systems, when gcc is being used. See the host.c source
654 file for comments.
655
b6c6011d
PH
656PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
657
cf39cf57
PH
658PH/10 Named domain lists were not working if used in a queue_smtp_domains
659 setting.
660
f1513293
PH
661PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
662 transport and to the smtp transport in LMTP mode.
663
727549a4
PH
664TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
665
af46795e
PH
666PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
667 run a filter in a subprocess. This could lead to confusion in subsequent
668 lookups in the parent process. There should also be a search_tidyup() at
669 the end of the subprocess.
670
d7b47fd0
PH
671PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
672 only if the host matched helo_try_verify_hosts, which caused the
673 verification to occur when the EHLO/HELO command was issued. The ACL just
674 tested the remembered result. Now, if a previous verification attempt has
675 not happened, "verify = helo" does it there and then.
676
ee744174
JJ
677JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
678
b582ab87
PH
679TK/03 Fix log output including CR from clamd.
680
41a13e0a
PH
681PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
682 exist provoked a memory error which could cause a segfault.
683
f625cc5a
PH
684PH/15 Installed PCRE 6.2
685
686PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
687
21f7af35
PH
688PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
689 of the problem. Specifically, suggested +O2 rather than +O1 for the
690 HP-UX compiler.
691
31480e42
PH
692PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
693
2d280592
PH
694PH/20 If a delivery was routed to a non-standard port by means of an SRV
695 record, the port was not correctly logged when the outgoing_port log
696 selector was set (it logged the transort's default port).
697
7cd1141b
PH
698PH/21 Added support for host-specific ports to manualroute, queryprogram,
699 fallback_hosts, and "hosts" in the smtp transport.
700
701PH/22 If the log selector "outgoing_port" is set, the port is now also given on
702 host errors such as "Connection refused".
703
750af86e
PH
704PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
705 authentication with radiusclient 0.4.9:
706
707 - Error returned from rc_read_config was caught wrongly
708 - Username/password not passed on to radius server due to wrong length.
709
710 The presumption is that some radiusclient API changes for 4.51/PH/17
711 were not taken care of correctly. The code is still untested by me (my
712 Linux distribution still has 0.3.2 of radiusclient), but it was
713 contributed by a Radius user.
714
715PH/24 When doing a callout, the value of $domain wasn't set correctly when
716 expanding the "port" option of the smtp transport.
717
4304270b
TK
718TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
719 while reading a MIME header. Thanks to Tom Hughes for a patch.
720
750af86e
PH
721PH/24 Include config.h inside local_scan.h so that configuration settings are
722 available.
723
64ffc24f
PH
724PH/25 Make $smtp_command_argument available after all SMTP commands. This means
725 that in an ACL for RCPT (for example), you can examine exactly what was
726 received.
727
5dd9625b
PH
728PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
729 commands, but it was not correctly comparing the address with the actual
730 client host address. Thus, it would show the EHLO address in Received:
731 header lines when this was not necessary.
732
5591031b
PH
733PH/27 Added the % operator to ${eval:}.
734
ba18e66a
PH
735PH/28 Exim tries to create and chdir to its spool directory when it starts;
736 it should be ignoring failures (because with -C, for example, it has lost
737 privilege). It wasn't ignoring creation failures other than "already
738 exists".
739
9cec981f
PH
740PH/29 Added "crypteq" to the list of supported features that Exim outputs when
741 -bV or -d is used.
742
aa2b5c79
PH
743PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
744 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
745 too many continuations, the temporary file was not being removed, and the
746 return code was incorrect.
aa2b5c79 747
48a53b7f
PH
748PH/31 Missing "BOOL" in function definition in filtertest.c.
749
1c59d63b
PH
750PH/32 Applied Sieve patches from the maintainer.
751
671012da
TK
752TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
753
1509d3a8
PH
754PH/33 Added "verify = not_blind".
755
756PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
757 Local/Makefile (with some defaults set). These are used in built scripts
758 such as exicyclog, but they have never been used in the exim_install
759 script (though there are many overriding facilities there). I have
760 arranged that the exim_install script now takes note of these two
761 settings.
762
763PH/35 Installed configuration files for Dragonfly.
764
2fe1a124
PH
765PH/36 When a locally submitted message by a trusted user did not contain a
766 From: header, and the sender address was obtained from -f or from an SMTP
767 MAIL command, and the trusted user did not use -F to supply a sender
768 name, $originator_name was incorrectly used when constructing a From:
769 header. Furthermore, $originator_name was used for submission mode
770 messages from external hosts without From: headers in a similar way,
771 which is clearly wrong.
772
8800895a
PH
773PH/37 Added control=suppress_local_fixups.
774
ccfdb010
PH
775PH/38 When log_selector = +received_sender was set, and the addition of the
776 sender made the log line's construction buffer exactly full, or one byte
777 less than full, an overflow happened when the terminating "\n" was
778 subsequently added.
779
1130bfb0
PH
780PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
781 when the result of a list match is failure because a DNS lookup failed.
782
ebcb507f
PH
783PH/40 RM_COMMAND is now used in the building process.
784
c35e155c
PH
785PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
786 the "build-* directories that it finds.
787
95d1f782
PH
788PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
789 address in a domain literal was a prefix of an interface address.
790
fd6de02e
PH
791PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
792 when verifying a sender address, unless rewrite_headers is false.
793
58de37c5
PH
794PH/44 Wrote a long comment about why errors_to addresses are verified as
795 recipients, not senders.
796
261cf466
TF
797TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
798 the ratelimit ACL was added.
799
3ee512ff
PH
800PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
801
e08c430f
PH
802PH/46 Added extra information about PostgreSQL errors to the error string.
803
bef5a11f
PH
804PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
805 avoiding the need to install special zones in a real server. This is
806 backwards compatible; if it can't find the fake resolver, it drops back.
807 Thus, both old and new test suites can be run.
808
7546de58
TF
809TF/02 Added util/ratelimit.pl
810
e5d5a95f
TF
811TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
812 clock is set back in time.
813
2e88a017
TF
814TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
815 Candler <B.Candler@pobox.com>.
816
a5f65aa4
TF
817TF/05 The fix for PH/43 was not completely correct; widen_domains is always
818 OK for addresses that are the result of redirections.
819
e7726cbf
PH
820PH/48 A number of further additions for the benefit of the new test suite,
821 including a fake gethostbyname() that interfaces to the fake DNS resolver
822 (see PH/47 above).
823
a7fdad5b
TF
824TF/06 The fix for widen_domains has also been applied to qualify_single and
825 search_parents which are the other dnslookup options that can cause
826 header rewrites.
827
6af56900
PH
828PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
829 type ("H").
830
0925ede6
PH
831PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
832
66afa403
TF
833TF/07 Exim produced the error message "an SRV record indicated no SMTP
834 service" if it encountered an MX record with an empty target hostname.
835 The message is now "an MX or SRV record indicated no SMTP service".
836
0154e85a
TF
837TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
838 if the DNS of the sending site is misconfigured. This is quite a
839 common situation. This change restores the behaviour of treating a
840 helo verification defer as a failure.
841
16f12c76
PH
842PH/51 If self=fail was set on a router, the bounce message did not include the
843 actual error message.
844
bbe902f0 845
e5a9dba6
PH
846Exim version 4.52
847-----------------
848
849TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
850
22c3b60b
PH
851PH/01 When a transport filter timed out in a pipe delivery, and the pipe
852 command itself ended in error, the underlying message about the transport
853 filter timeout was being overwritten with the pipe command error. Now the
854 underlying error message should be appended to the second error message.
855
06a9b4b5
PH
856TK/01 Fix poll() being unavailable on Mac OSX 10.2.
857
c1ac6996
PH
858PH/02 Reduce the amount of output that "make" produces by default. Full output
859 can still be requested.
860
9c7a242c
PH
861PH/03 The warning log line about a condition test deferring for a "warn" verb
862 was being output only once per connection, rather than after each
863 occurrence (because it was using the same function as for successful
864 "warn" verbs). This seems wrong, so I have changed it.
865
87ba3f5f
PH
866TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
867 it should not have, which might have caused a crash in the right
868 circumstances, but probably never did.
869
870PH/04 Installed a modified version of Tony Finch's patch to make submission
871 mode fix the return path as well as the Sender: header line, and to
872 add a /name= option so that you can make the user's friendly name appear
873 in the header line.
874
29aba418
TF
875TF/03 Added the control = fakedefer ACL modifier.
876
fe0dab11
TF
877TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
878 Mark Lowes for thorough testing.
870f6ba8 879
11d337a4
TK
880TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
881
882TK/03 Merged latest SRS patch from Miles Wilton.
883
415c8f3b
PH
884PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
885 with the definition in sysexits.h (which is #included earlier).
886 Fortunately, Exim does not actually use EX_OK. The code used to try to
887 preserve the sysexits.h value, by assumimg that macro definitions were
888 scanned for macro replacements. I have been disabused of this notion,
889 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 890
958541e9
PH
891PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
892 in the smtp transport. When a block could not be written in a single
893 write() function, the timeout was being re-applied to each part-write.
894 This seems wrong - if the receiver was accepting one byte at a time it
895 would take for ever. The timeout is now adjusted when this happens. It
896 doesn't have to be particularly precise.
897
c206415f
TK
898TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
899 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
900
2a4be8f9
PH
901PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
902 without a domain if the check to <postmaster@domain> fails.
903
1cba11c5
SC
904SC/01 Eximstats: added -xls and the ability to specify output files
905 (patch written by Frank Heydlauf).
906
907SC/02 Eximstats: use FileHandles for outputing results.
908
909SC/03 Eximstats: allow any combination of xls, txt, and html output.
910
911SC/04 Eximstats: fixed display of large numbers with -nvr option
912
913SC/05 Eximstats: fixed merging of reports with empty tables.
914
915SC/06 Eximstats: added the -include_original_destination flag
916
917SC/07 Eximstats: removed tabs and trailing whitespace.
918
1005d00e
TK
919TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
920
921TK/06 MBOX spool code: Add real "From " MBOX separator line
922 so the .eml file is really in mbox format (even though
923 most programs do not really care). Patch from Alex Miller.
924
925TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
926 The latter is generated from $received_to and is only set if the
927 message has one envelope recipient. SA can use these headers,
928 obviously out-of-the-box. Patch from Alex Miller.
929
9b4768fa
PH
930PH/08 The ${def test on a variable was returning false if the variable's
931 value was "0", contrary to what the specification has always said!
932 The result should be true unless the variable is empty.
933
934PH/09 The syntax error of a character other than { following "${if
935 def:variable_name" (after optional whitespace) was not being diagnosed.
936 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
937 accidental colon was present, for example, could give incorrect results.
938
0d7eb84a
PH
939PH/10 Tidied the code in a number of places where the st_size field of a stat()
940 result is used (not including appendfile, where other changes are about
941 to be made).
942
943PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
944 This involved changing a lot of size variables from int to off_t. It
945 should work with maildirs and everything.
946
40727bee
TK
947TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
948 spamd dying while we are connected to it.
949
554d2369
TF
950TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
951 <jgh@wizmail.org>
952
1f922db1
PH
953PH/12 Applied Alex Kiernan's patch for the API change for the error callback
954 function for BDB 4.3.
955
ef213c3b
PH
956PH/13 Changed auto_thaw such that it does not apply to bounce messages.
957
8ac170f3
PH
958PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
959 the sources for PCRE have been re-arranged and more files are now
960 involved.
961
b1c749bb
PH
962PH/15 The code I had for printing potentially long long variables in PH/11
963 above was not the best (it lost precision). The length of off_t variables
964 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
965 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
966 to be "long long int" or "long int". This is needed for the internal
967 formatting function string_vformat().
b1c749bb 968
4aac9b49
PH
969PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
970 the configuration file to be ":syslog", then the script "guesses" where
971 the logs files are, rather than using the compiled in default. In our
972 case the guess is not the same as the compiled default, so the script
973 suddenly stopped working when I started to use syslog. The patch checks
974 to see if log_file_path is "". If so, it attempts to read it from exim
975 with no configuration file to get the compiled in version, before it
976 falls back to the previous guessing code."
977
294520c8
TK
978TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
979 implementing BATV in an Exim configuration. See NewStuff for the gory
980 details.
981
5bd022fe
PH
982PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
983 Makefile that are specific to HP-UX.
984
90e9ce59
PH
985PH/18 If the "use_postmaster" option was set for a recipient callout together
986 with the "random" option, the postmaster address was used as the MAIL
987 FROM address for the random test, but not for the subsequent recipient
988 test. It is now used for both.
989
5ea81592
PH
990PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
991 patch removes a few documentation additions to RFC 3028, because the
992 latest draft now contains them. It adds the new en;ascii-case comparator
993 and a new error check for 8bit text in MIME parts. Comparator and
994 require names are now matched exactly. I enabled the subaddress
995 extension, but it is not well tested yet (read: it works for me)."
996
c6c2dc1d
PH
997PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
998 rework some of the code of TK/09 above to avoid the hardwired use of
999 "%lld" and "long long". Replaced the call to snprintf() with a call to
1000 string_vformat().
1001
fffffe4c
PH
1002PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1003 records point to non-existent hosts", "retry timeout exceeded", and
1004 "retry time not reached for any host after a long failure period".
ca02eafb 1005
9a26b6b2
PH
1006PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1007 experimental DomainKeys support:
1008
1009 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1010 (2) On an error such as an illegally used "control", the wrong name for
1011 the control was given.
1012
1013 These problems did NOT occur unless DomainKeys support was compiled.
1014
4aee0225
PH
1015PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1016
32d668a5
PH
1017PH/24 Added ${if match_ip condition.
1018
8187c3f3
PH
1019PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1020 databases so that it will be absolutely obvious if a crash occurs in the
1021 DB library. This is a regular occurrence (often caused by mis-matched
1022 db.h files).
1023
ff790e47 1024PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1025 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1026 picked up on a user's system that detects such things. There doesn't seem
1027 to be a gcc warning option for this - only an attribute that has to be
1028 put on the function's prototype. It seems that in Fedora Core 4 they have
1029 set this on a number of new functions. No doubt there will be more in due
1030 course.
ff790e47 1031
5417f6d1
PH
1032PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1033 specify a transport. However, if an address that was verified by such a
1034 router was the subject of a callout, Exim crashed because it tried to
1035 read the rcpt_include_affixes from the non-existent transport. Now it
1036 just assumes that the setting of that option is false. This bug was
1037 introduced by 4.51/PH/31.
1038
59cf8544
PH
1039PH/28 Changed -d+all to exclude +memory, because that information is very
1040 rarely of interest, but it makes the output a lot bigger. People tend to
1041 do -d+all out of habit.
1042
e7ad8a65
PH
1043PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1044 code in os-type was giving problems when libc.so lives in lib64, like on
1045 x86_64 Fedora Core.
1046
ade42478
PH
1047PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1048 aren't the modern standard, and it seems that some systems' include files
1049 don't always have them. Exim was already checking for some of the newer
1050 ones like T_AAAA, and defining it itself. I've added checks for all the
1051 record types that Exim uses.
1052
182ad5cf
PH
1053PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1054 not automatically generating a new one, as it is supposed to. This
1055 prevented TLS from working. If the file did exist, but contained invalid
1056 data, a new version was generated, as expected. It was only the case of a
1057 non-existent file that was broken.
1058
b0d9fc80
TK
1059TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1060 with a change in libdomainkeys > 0.64.
1061
1062TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1063 from DNS. If the selector record carries the flag, it now has
1064 precedence over the domain-wide flag.
1065
1066TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1067
47c7a64a
PH
1068PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1069 the use of a port name that isn't defined in /etc/services) occurred, the
1070 message was deferred as in a normal delivery, and thus remained on the
1071 spool, instead of being failed because of the mua_wrapper setting. This
1072 is now fixed, and I tidied up some of the mua_wrapper messages at the
1073 same time.
1074
a388bce4
SC
1075SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1076 the messages in a hash of arrays rather than using individual hashes.
1077 This is a bit cleaner and results in dramatic memory savings, albeit
1078 at a slight CPU cost.
1079
1080SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1081 as requested by Marc Sherman.
1082
1083SC/10 Eximstats: added histograms for user specified patterns as requested
1084 by Marc Sherman.
1085
0793e4ed
SC
1086SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1087
c58b88df
PH
1088PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1089 fopen() in the content-scanning modules that did not already have it.
1090
e7ad8a65 1091
7982096b
PH
1092Exim version 4.51
1093-----------------
1094
1a46a8c5
PH
1095TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1096 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1097
2f079f46 1098TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1099
1100TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1101
1102PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1103 to test Sieve filters that use "vacation".
1104
1105PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1106 that changes the way the GnuTLS parameters are stored in the cache file.
1107 The new format can be generated externally. For backward compatibility,
1108 if the data in the cache doesn't make sense, Exim assumes it has read an
1109 old-format file, and it generates new data and writes a new file. This
1110 means that you can't go back to an older release without removing the
1111 file.
1112
1113PH/03 A redirect router that has both "unseen" and "one_time" set does not
1114 work if there are any delivery delays because "one_time" forces the
1115 parent to be marked "delivered", so its unseen clone is never tried
1116 again. For this reason, Exim now forbids the simultaneous setting of
1117 these two options.
1118
1119PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1120 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1121 entry if you want to know the details. The fix, however, neglected to
1122 consider the case when local delivery batching is involved. The test for
1123 "previously delivered" was not happening when checking to see if an
1124 address could be batched with a previous (undelivered) one; under
1125 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1126 address.
1a46a8c5
PH
1127
1128PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1129 in its include files, and this causes problems building Exim.
1130
1131PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1132 header_syntax) but Exim was just ignoring anything given after a slash.
1133 In particular, this caused confusion with an attempt to use "verify =
1134 reverse_host_lookup/defer_ok". An error is now given when options are
1135 supplied for verify items that do not have them. (Maybe reverse_host_
1136 lookup should have a defer_ok option, but that's a different point.)
1137
1138PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1139 defined by RFC 821) to 2048, because there were problems with some AUTH
1140 commands, and RFC 1869 says the size should be increased for extended
1141 SMTP commands that take arguments.
1142
1143PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1144 Finch).
1145
1146PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1147 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1148
49c2d5ea
PH
1149PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1150 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1151 whatever). Otherwise the password may appear in the log. Following change
1152 PH/42 below, there is no longer a chance of it appearing in a bounce
1153 message.
49c2d5ea 1154
bf759a8b
PH
1155PH/11 Installed exipick version 20050225.0 from John Jetmore.
1156
83364d30
PH
1157PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1158 of its addresses was ever tried. (Bugzilla bug #2.)
1159
7999bbd7
PH
1160PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1161 the result incorrectly in the debug output. (It correctly added a newline
1162 to what was transported.)
1163
7dbf77c9
PH
1164TF/01 Added $received_time.
1165
74e0617f
PH
1166PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1167 commented out examples of how to interface to a virus scanner and to
1168 SpamAssassin. Also added commented examples of av_scanner and
1169 spamd_address settings.
1170
2f079f46
PH
1171PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1172 and controls are allowed in which ACLs. There were a couple of minor
1173 errors. Some of the entries in the conditions table (which is a table of
1174 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1175 negation of where the condition IS allowed.
1176
8c841523
PH
1177PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1178
7766a4f0
PH
1179PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1180 header file does not have a version number, so I've had to invent a new
1181 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1182 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1183 radiusclient), but it was contributed by a Radius user.
1184
8b417f2c
PH
1185PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1186 files or directories, for OpenSSL.
1187
901f42cb
PH
1188PH/19 When an Exim process that is running as root has to create an Exim log
1189 file, it does so in a subprocess that runs as exim:exim so as to get the
1190 ownership right at creation (otherwise, other Exim processes might see
1191 the file with the wrong ownership). There was no test for failure of this
1192 fork() call, which would lead to the process getting stuck as it waited
1193 for a non-existent subprocess. Forks do occasionally fail when resources
1194 run out. I reviewed all the other calls to fork(); they all seem to check
1195 for failure.
1196
f9b9210e
PH
1197PH/20 When checking for unexpected SMTP input at connect time (before writing
1198 the banner), Exim was not dealing correctly with a non-positive return
1199 from the read() function. If the client had disconnected by this time,
1200 the result was a log entry for a synchronization error with an empty
1201 string after "input=" when read() returned zero. If read() returned -1
1202 (an event I could not check), uninitialized data bytes were printed.
1203 There were reports of junk text (parts of files, etc) appearing after
1204 "input=".
1205
54cdb463
PH
1206PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1207
cf00dad6
PH
1208PH/22 Added support for macro redefinition, and (re)definition in between
1209 driver and ACL definitions.
1210
acb1b346
PH
1211PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1212 forgetting to use the resulting value; it was using the unexpanded value.
1213
c5ddb310
PH
1214PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1215 hadn't been configured. The fix is from Juergen Kreileder, who
1216 understands it better than I do:
1217
1218 "Here's what I see happening with three configured cyrus_sasl
1219 authenticators configured (plain, login, cram-md5):
1220
1221 On startup auth_cyrus_sasl_init() gets called for each of these.
1222 This means three calls to sasl_listmech() without a specified mech_list.
1223 => SASL tests which mechs of all available mechs actually work
1224 => three warnings about OTP not working
1225 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1226
1227 With the patch, sasl_listmech() also gets called three times. But now
1228 SASL's mech_list option is set to the server_mech specified in the the
1229 authenticator. Or in other words, the answer from sasl_listmech()
1230 gets limited to just the mech you're testing for (which is different
1231 for each call.)
1232 => the return list contains just 'plain' or 'login', 'cram-md5' or
1233 nothing depending on the value of ob->server_mech.
1234
1235 I've just tested the patch: Authentication still works fine,
1236 unavailable mechs specified in the exim configuration are still
1237 caught, and the auth.log warnings about OTP are gone."
1238
31619da6
PH
1239PH/25 When debugging is enabled, the contents of the command line are added
1240 to the debugging output, even when log_selector=+arguments is not
1241 specified.
1242
bebaf0fc
PH
1243PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1244 answer is "GNU", and only if the return is "GNU/something" is the answer
1245 "Linux".
1246
475fe28a
PH
1247PH/27 $acl_verify_message is now set immediately after the failure of a
1248 verification in an ACL, and so is available in subsequent modifiers. In
1249 particular, the message can be preserved by coding like this:
1250
1251 warn !verify = sender
1252 set acl_m0 = $acl_verify_message
1253
1254 Previously, $acl_verify_message was set only while expanding "message"
1255 and "log_message" when a very denied access.
1256
7e8bec7a
PH
1257PH/28 Modified OS/os.c-Linux with
1258
1259 -#ifndef OS_LOAD_AVERAGE
1260 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1261
1262 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1263 nomenclature these days.)
1264
e4a89c47
PH
1265PH/29 Installed patch from the Sieve maintainer that adds the options
1266 sieve_useraddress and sieve_subaddress to the redirect router.
1267
5ca2a9a1
PH
1268PH/30 In these circumstances:
1269 . Two addresses routed to the same list of hosts;
1270 . First host does not offer TLS;
1271 . First host accepts first address;
1272 . First host gives temporary error to second address;
1273 . Second host offers TLS and a TLS session is established;
1274 . Second host accepts second address.
1275 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1276 and peerdn, if requested) that were in fact used only for the second
1277 address.
7e8bec7a 1278
c688b954
PH
1279PH/31 When doing a callout as part of verifying an address, Exim was not paying
1280 attention to any local part prefix or suffix that was matched by the
1281 router that accepted the address. It now behaves in the same way as it
1282 does for delivery: the affixes are removed from the local part unless
1283 rcpt_include_affixes is set on the transport.
1284
fed77020
PH
1285PH/32 Add the sender address, as F=<...>, to the log line when logging a
1286 timeout during the DATA phase of an incoming message.
1287
7fe1560f
PH
1288PH/33 Sieve envelope tests were broken for match types other than :is. I have
1289 applied a patch sanctioned by the Sieve maintainer.
c688b954 1290
ebb6e6d5
PH
1291PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1292 the uid or gid is negative. A case of a negative gid caused this to be
1293 noticed. The fix allows for either to be negative.
1294
9c4e8f60
PH
1295PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1296 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1297 overlooked.
1298
1299PH/36 The change PH/12 above was broken. Fixed it.
1300
d7174846
PH
1301PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1302 the grounds that routing the same address twice would always produce the
1303 same answer. This might have been true once, but it is certainly no
1304 longer true now. Routing a child address may depend on the previous
1305 routing that produced that child. Some complicated redirection strategies
1306 went wrong when messages had multiple recipients, and made Exim's
1307 behaviour dependent on the order in which the addresses were given.
1308
1309 I have moved the duplicate checking until after the routing is complete.
1310 Exim scans the addresses that are assigned to local and remote
1311 transports, and removes any duplicates. This means that more work will be
1312 done, as duplicates will always all be routed, but duplicates are
1313 presumably rare, so I don't expect this is of any significance.
1314
1315 For deliveries to pipes, files, and autoreplies, the duplicate checking
1316 still happens during the routing process, since they are not going to be
1317 routed further.
1318
cfe75fc3
PH
1319PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1320 It corrects a timeout issue with spamd. This is Ian's comment: "The
1321 background is that sometimes spamd either never reads data from a
1322 connection it has accepted, or it never writes response data. The exiscan
1323 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1324 blindly assumes that writes won't block so it may never time out."
1325
be22d70e
PH
1326PH/39 Allow G after quota size as well as K and M.
1327
0612b098
PH
1328PH/40 The value set for $authenticated_id in an authenticator may not contain
1329 binary zeroes or newlines because the value is written to log lines and
1330 to spool files. There was no check on this. Now the value is run through
1331 the string_printing() function so that such characters are converted to
1332 printable escape sequences.
1333
2e0c1448
PH
1334PH/41 $message_linecount is a new variable that contains the total number of
1335 lines in the message. Compare $body_linecount, which is the count for the
1336 body only.
1337
447d236c
PH
1338PH/42 Exim no longer gives details of delivery errors for specific addresses in
1339 bounce and delay warning messages, except in certain special cases, which
1340 are as follows:
1341
1342 (a) An SMTP error message from a remote host;
1343 (b) A message specified in a :fail: redirection;
1344 (c) A message specified in a "fail" command in a system filter;
1345 (d) A message specified in a FAIL return from the queryprogram router;
1346 (e) A message specified by the cannot_route_message router option.
1347
1348 In these cases only, Exim does include the error details in bounce and
1349 warning messages. There are also a few cases where bland messages such
1350 as "unrouteable address" or "local delivery error" are given.
1351
d20976dc
PH
1352PH/43 $value is now also set for the "else" part of a ${run expansion.
1353
f656d135
PH
1354PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1355 being worked on, but at least Exim now implements the latest version to
1356 play with."
1357
2e2a30b4
PH
1358PH/45 In a pipe transport, although a timeout while waiting for the pipe
1359 process to complete was treated as a delivery failure, a timeout while
1360 writing the message to the pipe was logged, but erroneously treated as a
1361 successful delivery. Such timeouts include transport filter timeouts. For
1362 consistency with the overall process timeout, these timeouts are now
1363 treated as errors, giving rise to delivery failures by default. However,
1364 there is now a new Boolean option for the pipe transport called
1365 timeout_defer, which, if set TRUE, converts the failures into defers for
1366 both kinds of timeout. A transport filter timeout is now identified in
1367 the log output.
1368
9176e9f0
PH
1369PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1370 systems where "make" and "gmake" are different, calling "gmake" at top
1371 level broke things. I've arranged for the value of $(MAKE) to be passed
1372 from the Makefile to this script so that it can call the same version of
1373 "make".
1374
7982096b 1375
bbe902f0
PH
1376A note about Exim versions 4.44 and 4.50
1377----------------------------------------
1378
1379Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1380changes of various kinds. As a consequence, a big documentation update was
1381needed. This delayed the release for rather longer than seemed good, especially
1382in the light of a couple of (minor) security issues. Therefore, the changes
1383that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1384release. So 4.44 and 4.50 are in effect two different branches that both start
1385from 4.43.
1386
1387I have left the 4.50 change log unchanged; it contains all the changes since
13884.43. The change log for 4.44 is below; many of its items are identical to
1389those for 4.50. This seems to be the most sensible way to preserve the
1390historical information.
1391
1392
f7b63901 1393Exim version 4.50
495ae4b0
PH
1394-----------------
1395
5fe762f6
PH
1396 1. Minor wording change to the doc/README.SIEVE file.
1397
139059f6 1398 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1399 computation of the current number of files was incorrect.
495ae4b0 1400
7086e875
PH
1401 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1402 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1403 place.
1404
35af9f61
PH
1405 4. Give more explanation in the error message when the command for a transport
1406 filter fails to execute.
1407
b668c215
PH
1408 5. There are several places where Exim runs a non-Exim command in a
1409 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1410 was being done only for the command run by the queryprogram router. It is
1411 now done for all such subprocesses. The other cases are: ${run, transport
1412 filters, and the commands run by the lmtp and pipe transports.
1413
a494b1e1
PH
1414 6. Added CONFIGURE_GROUP build-time option.
1415
1416 7. Some older OS have a limit of 256 on the maximum number of file
1417 descriptors. Exim was using setrlimit() to set 1000 as a large value
1418 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1419 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1420
c5fcb476
PH
1421 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1422 was an oversight, and furthermore, ever since the addition of extra
1423 controls (e.g. 4.43/32), the checks on when to allow different forms of
1424 "control" were broken. There should now be diagnostics for all cases when a
1425 control that does not make sense is encountered.
1426
69358f02
PH
1427 9. Added the /retain_sender option to "control=submission".
1428
5be20824
PH
142910. $recipients is now available in the predata ACL (oversight).
1430
eb2c0248
PH
143111. Tidy the search cache before the fork to do a delivery from a message
1432 received from the command line. Otherwise the child will trigger a lookup
1433 failure and thereby defer the delivery if it tries to use (for example) a
1434 cached ldap connection that the parent has called unbind on.
1435
2a3eea10
PH
143612. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1437 of $address_data from the recipient verification was clobbered by the
1438 sender verification.
1439
144013. The value of address_data from a sender verification is now available in
1441 $sender_address_data in subsequent conditions in the ACL statement.
1442
23c7ff99
PH
144314. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1444
4deaf07d
PH
144515. Added a new option "connect=<time>" to callout options, to set a different
1446 connection timeout.
1447
926e1192
PH
144816. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1449 was its contents. (It was OK if the option was not defined at all.)
1450
650edc6f
PH
145117. A "Completed" log line is now written for messages that are removed from
1452 the spool by the -Mrm option.
1453
2c7db3f5
PH
145418. New variables $sender_verify_failure and $recipient_verify_failure contain
1455 information about exactly what failed.
1456
3d235903
PH
145719. Added -dd to debug only the daemon process.
1458
7c7ad977
PH
145920. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1460 handles timeouts, both on the server side and network timeouts. Renamed the
1461 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1462
981756db
PH
146321. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1464 It is now set to "smtps".
1465
d4eb88df
PH
146622. $host_address is now set to the target address during the checking of
1467 ignore_target_hosts.
1468
146923. When checking ignore_target_hosts for an ipliteral router, no host name was
1470 being passed; this would have caused $sender_host_name to have been used if
1471 matching the list had actually called for a host name (not very likely,
1472 since this list is usually IP addresses). A host name is now passed as
1473 "[x.x.x.x]".
1474
7d468ab8
PH
147524. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1476 code that specifies a non-restarting handler (typically sigaction() in
1477 modern systems) in an attempt to fix a rare and obscure crash bug.
1478
147925. Narrowed the window for a race in the daemon that could cause it to ignore
1480 SIGCHLD signals. This is not a major problem, because they are used only to
1481 wake it up if nothing else does.
1482
62c0818f
PH
148326. A malformed maildirsize file could cause Exim to calculate negative values
1484 for the mailbox size or file count. Odd effects could occur as a result.
1485 The maildirsize information is now recalculated if the size or filecount
1486 end up negative.
1487
26034054
PH
148827. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1489 support for a long time. Removed HAVE_SYS_VFS_H.
1490
af66f652
PH
149128. Installed the latest version of exipick from John Jetmore.
1492
90af77f4
PH
149329. In an address list, if the pattern was not a regular expression, an empty
1494 subject address (from a bounce message) matched only if the pattern was an
1495 empty string. Non-empty patterns were not even tested. This was the wrong
1496 because it is perfectly reasonable to use an empty address as part of a
1497 database query. An empty address is now tested by patterns that are
1498 lookups. However, all the other forms of pattern expect the subject to
1499 contain a local part and a domain, and therefore, for them, an empty
1500 address still always fails if the pattern is not itself empty.
1501
d8ef3577
PH
150230. Exim went into a mad DNS loop when attempting to do a callout where the
1503 host was specified on an smtp transport, and looking it up yielded more
1504 than one IP address.
1505
5cb8cbc6
PH
150631. Re-factored the code for checking spool and log partition space into a
1507 function that finds that data and another that does the check. The former
1508 is then used to implement four new variables: $spool_space, $log_space,
1509 $spool_inodes, and $log_inodes.
1510
14702f5b
PH
151132. The RFC2047 encoding function was originally intended for short strings
1512 such as real names; it was not keeping to the 75-character limit for
1513 encoded words that the RFC imposes. It now respects the limit, and
1514 generates multiple encoded words if necessary. To be on the safe side, I
1515 have increased the buffer size for the ${rfc2047: expansion operator from
1516 1024 to 2048 bytes.
1517
063b1e99
PH
151833. It is now permitted to omit both strings after an "if" condition; if the
1519 condition is true, the result is "true". As before, when the second string
1520 is omitted, a false condition yields an empty string. This makes it less
1521 cumbersome to write custom ACL and router conditions.
1522
652e1b65
PH
152334. Failure to deliver a bounce message always caused it to be frozen, even if
1524 there was an errors_to setting on the router. The errors_to setting is now
1525 respected.
1526
6f0c9a4f
PH
152735. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1528 canonical form (fully expanded) before being placed in
1529 $sender_host_address.
1530
33397d19
PH
153136. The table in the code that translates DNS record types into text (T_A to
1532 "A" for instance) was missing entries for NS and CNAME. It is just possible
1533 that this could have caused confusion if both these types were looked up
1534 for the same domain, because the text type is used as part of Exim's
1535 per-process caching. But the chance of anyone hitting this buglet seems
1536 very small.
1537
7bb56e1f
PH
153837. The dnsdb lookup has been extended in a number of ways.
1539
1540 (1) There is a new type, "zns", which walks up the domain tree until it
1541 finds some nameserver records. It should be used with care.
1542
ea3bc19b
PH
1543 (2) There is a new type, "mxh", which is like "mx" except that it returns
1544 just the host names, not the priorities.
1545
1546 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1547 looked up. The behaviour when one of the lookups defers can be
1548 controlled by a keyword.
7bb56e1f 1549
ea3bc19b 1550 (4) It is now possible to specify the separator character for use when
7bb56e1f 1551 multiple records are returned.
33397d19 1552
0bcb2a0e
PH
155338. The dnslists ACL condition has been extended: it is now possible to supply
1554 a list of IP addresses and/or domains to be looked up in a particular DNS
1555 domain.
1556
2ac0e484
PH
155739. Added log_selector=+queue_time_overall.
1558
4e1fde53
PH
155940. When running the queue in the test harness, wait just a tad after forking a
1560 delivery process, to get repeatability of debugging output.
1561
de365ded
PH
156241. Include certificate and key file names in error message when GnuTLS fails
1563 to set them up, because the GnuTLS error message doesn't include the name
1564 of the failing file when there is a problem reading it.
1565
f05da2e8
PH
156642. Allow both -bf and -bF in the same test run.
1567
d6453af2
PH
156843. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1569
f7b63901
PH
157044. The "Exiscan patch" is now merged into the mainline Exim source.
1571
157245. Sometimes the final signoff response after QUIT could fail to get
1573 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1574 < 0 before doing a fflush(). This bug looks as though it goes back to the
1575 introduction of TLS in release 3.20, but "sometimes" must have been rare
1576 because the tests only now provoked it.
1577
a444213a
PH
157846. Reset the locale to "C" after calling embedded Perl, in case it was changed
1579 (this can affect the format of dates).
1580
0ec020ea
PH
158147. exim_tidydb, when checking for the continued existence of a message for
1582 which it has found a message-specific retry record, was not finding
1583 messages that were in split spool directories. Consequently, it was
1584 deleting retry records that should have stayed in existence.
1585
b1206957
PH
158648. Steve fixed some bugs in eximstats.
1587
158849. The SPA authentication driver was not abandoning authentication and moving
1589 on to the next authenticator when an expansion was forced to fail,
1590 contradicting the general specification for all authenticators. Instead it
1591 was generating a temporary error. It now behaves as specified.
1592
26dd5a95
PH
159350. The default ordering of permitted cipher suites for GnuTLS was pessimal
1594 (the order specifies the preference for clients). The order is now AES256,
1595 AES128, 3DES, ARCFOUR128.
1596
343b2385
PH
159751. Small patch to Sieve code - explicitly set From: when generating an
1598 autoreply.
1599
1c5466b9
PH
160052. Exim crashed if a remote delivery caused a very long error message to be
1601 recorded - for instance if somebody sent an entire SpamAssassin report back
1602 as a large number of 550 error lines. This bug was coincidentally fixed by
1603 increasing the size of one of Exim's internal buffers (big_buffer) that
1604 happened as part of the Exiscan merge. However, to be on the safe side, I
1605 have made the code more robust (and fixed the comments that describe what
1606 is going on).
1607
55ee9ee3
PH
160853. Now that there can be additional text after "Completed" in log lines (if
1609 the queue_time_overall log selector is set), a one-byte patch to exigrep
1610 was needed to allow it to recognize "Completed" as not the last thing in
1611 the line.
1612
d38f8232
PH
161354. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1614 patch that reportedly fixes this has been added. I am not expert enough to
1615 create a test for it. This is what the patch creator wrote:
1616
1617 "I found a little strange behaviour of ldap code when working with
1618 Windows 2003 AD Domain, where users was placed in more than one
1619 Organization Units. When I tried to give exim partial DN, the exit code
1620 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1621 But simultaneously result of request was absolutely normal ldap result,
1622 so I produce this patch..."
1623
3295e65b
PH
1624 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1625 REFERENCE, so I have modified the code to exclude the patch when that macro
1626 is not defined.
1627
7102e136
PH
162855. Some experimental protocols are using DNS PTR records for new purposes. The
1629 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1630 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1631 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1632 CAN-2005-0021
7102e136 1633
3ca0ba97
PH
163456. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1635
c2bcbe20
PH
163657. Double the size of the debug message buffer (to 2048) so that more of very
1637 long debug lines gets shown.
1638
18ce445d
PH
163958. The exicyclog utility now does better if the number of log files to keep
1640 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1641
1f5b4c3d
PH
164259. Two changes related to the smtp_active_hostname option:
1643
1644 (1) $smtp_active_hostname is now available as a variable.
1645 (2) The default for smtp_banner uses $smtp_active_hostname instead
1646 of $primary_hostname.
1647
b975ba52
PH
164860. The host_aton() function is supposed to be passed a string that is known
1649 to be a valid IP address. However, in the case of IPv6 addresses, it was
1650 not checking this. This is a hostage to fortune. Exim now panics and dies
1651 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1652 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1653 components; fortuitously, this particular loophole had already been fixed
1654 by change 4.50/55 above.
1655
1656 If there are any other similar loopholes, the new check in host_aton()
1657 itself should stop them being exploited. The report I received stated that
1658 data on the command line could provoke the exploit when Exim was running as
1659 exim, but did not say which command line option was involved. All I could
1660 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1661 running as the user.
ea3a6f44 1662 CAN-2005-0021
85b87bc2
PH
1663
166461. There was a buffer overflow vulnerability in the SPA authentication code
1665 (which came originally from the Samba project). I have added a test to the
1666 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1667 CAN-2005-0022
b975ba52 1668
17ffcae7
PH
166962. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1670 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1671
d95f9fdb
PH
167263. The daemon start-up calls getloadavg() while still root for those OS that
1673 need the first call to be done as root, but it missed one case: when
1674 deliver_queue_load_max is set with deliver_drop_privilege. This is
1675 necessary for the benefit of the queue runner, because there is no re-exec
1676 when deliver_drop_privilege is set.
1677
86b8287f
PH
167864. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1679 This has been fixed.
1680
60dc5e56
PH
168165. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1682 was in use, was not putting the data itself into the right store pool;
1683 consequently, it could be overwritten for a subsequent message in the same
1684 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1685 the caching.)
1686
533244af
PH
168766. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1688
a5a28604
PH
168967. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1690 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1691 the function were treating the return as a boolean value, which happened to
1692 work because 0=false and not-0=true, but is not correct code.
1693
7e634d24
PH
169468. The host_aton() function was not handling scoped IPv6 addresses (those
1695 with, for example, "%eth0" on the end) correctly.
1696
3e11c26b
PH
169769. Fixed some compiler warnings in acl.c for the bitmaps specified with
1698 negated items (that is, ~something) in unsigned ints. Some compilers
1699 apparently mutter when there is no cast.
1700
6729cf78
PH
170170. If an address verification called from an ACL failed, and did not produce a
1702 user-specific message (i.e. there was only a "system" message), nothing was
1703 put in $acl_verify_message. In this situation, it now puts the system
1704 message there.
1705
00f00ca5
PH
170671. Change 4.23/11 added synchronization checking at the start of an SMTP
1707 session; change 4.31/43 added the unwanted input to the log line - except
1708 that it did not do this in the start of session case. It now does.
1709
c9bdd01c
PH
171072. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1711 This is wrong and can cause the other end to generate a synchronization
1712 error if it is another Exim or anything else that does the synchronization
1713 check. A QUIT command is no longer sent after a timeout.
1714
d43194df
PH
171573. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1716 during host lookups.
1717
fe5b5d0b
PH
171874. The defer_ok option of callout verification was not working if it was used
1719 when verifying addresses in header lines, that is, for this case:
1720
1721 verify = header_sender/callout=defer_ok
1722
76a2d7ba
PH
172375. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1724 those file descriptors could be used for SMTP connections. If anything
1725 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1726 could be sent to the SMTP client, causing chaos. The daemon now opens
1727 stdin, stdout, and stderr to /dev/null when it puts itself into the
1728 background.
1729
173076. Arrange for output from Perl's "warn" command to be written to Exim's main
1731 log by default. The user can override this with suitable Perl magic.
1732
04f7d5b9
PH
173377. The use of log_message on a "discard" ACL verb, which is supposed to add to
1734 the log message when discard triggers, was not working for the DATA ACL or
1735 for the non-SMTP ACL.
1736
bc60667e
PH
173778. Error message wording change in sieve.c.
1738
bb6e88ff
PH
173979. If smtp_accept_max_per_host was set, the number of connections could be
1740 restricted to fewer than expected, because the daemon was trying to set up
1741 a new connection before checking whether the processes handling previous
1742 connections had finished. The check for completed processes is now done
1743 earlier. On busy systems, this bug wouldn't be noticed because something
1744 else would have woken the daemon, and it would have reaped the completed
1745 process earlier.
1746
1e70f85b
PH
174780. If a message was submitted locally by a user whose login name contained one
1748 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1749 It caused a spool format error. I have fixed the spool reading code. A
1750 related problem was that the "from" clause in the Received: line became
1751 illegal because of the space(s). It is now covered by ${quote_local_part.
1752
175381. Included the latest eximstats from Steve (adds average sizes to HTML Top
1754 tables).
1755
4e01f9d6
PH
175682. Updated OS/Makefile-AIX as per message from Mike Meredith.
1757
1ee1cef2
PH
175883. Patch from Sieve maintainer to fix unterminated string problem in
1759 "vacation" handling.
1760
6e2b4ccc
PH
176184. Some minor changes to the Linux configuration files to help with other
1762 OS variants using glibc.
1763
8e669ac1
PH
176485. One more patch for Sieve to update vacation handling to latest spec.
1765
495ae4b0 1766
bbe902f0
PH
1767----------------------------------------------------
1768See the note above about the 4.44 and 4.50 releases.
1769----------------------------------------------------
1770
1771
1772Exim version 4.44
1773-----------------
1774
1775 1. Change 4.43/35 introduced a bug that caused file counts to be
1776 incorrectly computed when quota_filecount was set in an appendfile
1777 transport
1778
1779 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1780 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1781 place.
1782
1783 3. Give more explanation in the error message when the command for a transport
1784 filter fails to execute.
1785
1786 4. There are several places where Exim runs a non-Exim command in a
1787 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1788 was being done only for the command run by the queryprogram router. It is
1789 now done for all such subprocesses. The other cases are: ${run, transport
1790 filters, and the commands run by the lmtp and pipe transports.
1791
1792 5. Some older OS have a limit of 256 on the maximum number of file
1793 descriptors. Exim was using setrlimit() to set 1000 as a large value
1794 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1795 systems. I've change it so that if it can't get 1000, it tries for 256.
1796
1797 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1798 was an oversight, and furthermore, ever since the addition of extra
1799 controls (e.g. 4.43/32), the checks on when to allow different forms of
1800 "control" were broken. There should now be diagnostics for all cases when a
1801 control that does not make sense is encountered.
1802
1803 7. $recipients is now available in the predata ACL (oversight).
1804
1805 8. Tidy the search cache before the fork to do a delivery from a message
1806 received from the command line. Otherwise the child will trigger a lookup
1807 failure and thereby defer the delivery if it tries to use (for example) a
1808 cached ldap connection that the parent has called unbind on.
1809
1810 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1811 of $address_data from the recipient verification was clobbered by the
1812 sender verification.
1813
181410. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1815 was its contents. (It was OK if the option was not defined at all.)
1816
181711. A "Completed" log line is now written for messages that are removed from
1818 the spool by the -Mrm option.
1819
182012. $host_address is now set to the target address during the checking of
1821 ignore_target_hosts.
1822
182313. When checking ignore_target_hosts for an ipliteral router, no host name was
1824 being passed; this would have caused $sender_host_name to have been used if
1825 matching the list had actually called for a host name (not very likely,
1826 since this list is usually IP addresses). A host name is now passed as
1827 "[x.x.x.x]".
1828
182914. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1830 code that specifies a non-restarting handler (typically sigaction() in
1831 modern systems) in an attempt to fix a rare and obscure crash bug.
1832
183315. Narrowed the window for a race in the daemon that could cause it to ignore
1834 SIGCHLD signals. This is not a major problem, because they are used only to
1835 wake it up if nothing else does.
1836
183716. A malformed maildirsize file could cause Exim to calculate negative values
1838 for the mailbox size or file count. Odd effects could occur as a result.
1839 The maildirsize information is now recalculated if the size or filecount
1840 end up negative.
1841
184217. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1843 support for a long time. Removed HAVE_SYS_VFS_H.
1844
ea3a6f44 184518. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1846
184719. Allow an empty sender to be matched against a lookup in an address list.
1848 Previously the only cases considered were a regular expression, or an
1849 empty pattern.
1850
185120. Exim went into a mad DNS lookup loop when doing a callout where the
1852 host was specified on the transport, if the DNS lookup yielded more than
1853 one IP address.
1854
ea3a6f44
NM
185521. The RFC2047 encoding function was originally intended for short strings
1856 such as real names; it was not keeping to the 75-character limit for
1857 encoded words that the RFC imposes. It now respects the limit, and
1858 generates multiple encoded words if necessary. To be on the safe side, I
1859 have increased the buffer size for the ${rfc2047: expansion operator from
1860 1024 to 2048 bytes.
bbe902f0 1861
ea3a6f44
NM
186222. Failure to deliver a bounce message always caused it to be frozen, even if
1863 there was an errors_to setting on the router. The errors_to setting is now
1864 respected.
bbe902f0
PH
1865
186623. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1867 canonical form (fully expanded) before being placed in
1868 $sender_host_address.
1869
187024. Updated eximstats to version 1.33
1871
ea3a6f44
NM
187225. Include certificate and key file names in error message when GnuTLS fails
1873 to set them up, because the GnuTLS error message doesn't include the name
1874 of the failing file when there is a problem reading it.
bbe902f0
PH
1875
187626. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1877 As per change 25.
bbe902f0 1878
ea3a6f44
NM
187927. Reset the locale to "C" after calling embedded Perl, in case it was changed
1880 (this can affect the format of dates).
bbe902f0 1881
ea3a6f44
NM
188228. exim_tidydb, when checking for the continued existence of a message for
1883 which it has found a message-specific retry record, was not finding
1884 messages that were in split spool directories. Consequently, it was
1885 deleting retry records that should have stayed in existence.
bbe902f0
PH
1886
188729. eximstats updated to version 1.35
1888 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1889 1.35 - bugfix such that pie charts by volume are generated correctly
1890
ea3a6f44
NM
189130. The SPA authentication driver was not abandoning authentication and moving
1892 on to the next authenticator when an expansion was forced to fail,
1893 contradicting the general specification for all authenticators. Instead it
1894 was generating a temporary error. It now behaves as specified.
bbe902f0 1895
ea3a6f44
NM
189631. The default ordering of permitted cipher suites for GnuTLS was pessimal
1897 (the order specifies the preference for clients). The order is now AES256,
1898 AES128, 3DES, ARCFOUR128.
bbe902f0 1899
ea3a6f44
NM
190031. Small patch to Sieve code - explicitly set From: when generating an
1901 autoreply.
bbe902f0 1902
ea3a6f44
NM
190332. Exim crashed if a remote delivery caused a very long error message to be
1904 recorded - for instance if somebody sent an entire SpamAssassin report back
1905 as a large number of 550 error lines. This bug was coincidentally fixed by
1906 increasing the size of one of Exim's internal buffers (big_buffer) that
1907 happened as part of the Exiscan merge. However, to be on the safe side, I
1908 have made the code more robust (and fixed the comments that describe what
1909 is going on).
bbe902f0 1910
ea3a6f44
NM
191133. Some experimental protocols are using DNS PTR records for new purposes. The
1912 keys for these records are domain names, not reversed IP addresses. The
1913 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1914 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1915 CAN-2005-0021
1916
ea3a6f44
NM
191734. The host_aton() function is supposed to be passed a string that is known
1918 to be a valid IP address. However, in the case of IPv6 addresses, it was
1919 not checking this. This is a hostage to fortune. Exim now panics and dies
1920 if the condition is not met. A case was found where this could be provoked
1921 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1922 components; fortuitously, this particular loophole had already been fixed
1923 by change 4.50/55 or 4.44/33 above.
1924
1925 If there are any other similar loopholes, the new check in host_aton()
1926 itself should stop them being exploited. The report I received stated that
1927 data on the command line could provoke the exploit when Exim was running as
1928 exim, but did not say which command line option was involved. All I could
1929 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1930 running as the user.
bbe902f0
PH
1931 CAN-2005-0021
1932
ea3a6f44
NM
193335. There was a buffer overflow vulnerability in the SPA authentication code
1934 (which came originally from the Samba project). I have added a test to the
1935 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1936 CAN-2005-0022
1937
ea3a6f44
NM
193836. The daemon start-up calls getloadavg() while still root for those OS that
1939 need the first call to be done as root, but it missed one case: when
1940 deliver_queue_load_max is set with deliver_drop_privilege. This is
1941 necessary for the benefit of the queue runner, because there is no re-exec
1942 when deliver_drop_privilege is set.
bbe902f0 1943
ea3a6f44
NM
194437. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1945 was in use, was not putting the data itself into the right store pool;
1946 consequently, it could be overwritten for a subsequent message in the same
1947 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1948 the caching.)
bbe902f0 1949
ea3a6f44
NM
195038. Sometimes the final signoff response after QUIT could fail to get
1951 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1952 < 0 before doing a fflush(). This bug looks as though it goes back to the
1953 introduction of TLS in release 3.20, but "sometimes" must have been rare
1954 because the tests only now provoked it.
bbe902f0
PH
1955
1956
495ae4b0
PH
1957Exim version 4.43
1958-----------------
1959
1960 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1961 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1962 Now it returns an integer. A number of calls were still expecting a T/F
1963 return. Fortuitously, in all cases, the tests worked in OK situations,
1964 which is the norm. However, things would have gone wrong on any write
1965 failures on the smtp file descriptor. This function is used when sending
1966 messages over SMTP and also when doing verify callouts.
1967
1968 2. When Exim is called to do synchronous delivery of a locally submitted
1969 message (the -odf or -odi options), it no longer closes stderr before doing
1970 the delivery.
1971
1972 3. Implemented the mua_wrapper option.
1973
1974 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1975
1976 5. Implemented the functions header_remove(), header_testname(),
1977 header_add_at_position(), and receive_remove_recipient(), and exported them
1978 to local_scan().
1979
1980 6. If an ACL "warn" statement specified the addition of headers, Exim already
1981 inserted X-ACL-Warn: at the start if there was no header name. However, it
1982 was not making this test for the second and subsequent header lines if
1983 there were newlines in the string. This meant that an invalid header could
1984 be inserted if Exim was badly configured.
1985
1986 7. Allow an ACL "warn" statement to add header lines at the start or after all
1987 the Received: headers, as well as at the end.
1988
1989 8. Added the rcpt_4xx retry error code.
1990
1991 9. Added postmaster_mailfrom=xxx to callout verification option.
1992
199310. Added mailfrom=xxxx to the callout verification option, for verify=
1994 header_sender only.
1995
199611. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1997 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1998
199912. Inserted some casts to stop certain compilers warning when using pointer
2000 differences as field lengths or precisions in printf-type calls (mostly
2001 affecting debugging statements).
2002
200313. Added optional readline() support for -be (dynamically loaded).
2004
200514. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2006 same clock tick as a message's arrival, so that its received time was the
2007 same as the "first fail" time on the retry record, and that message
2008 remained on the queue past the ultimate address timeout, every queue runner
2009 would try a delivery (because it was past the ultimate address timeout) but
2010 after another failure, the ultimate address timeout, which should have then
2011 bounced the address, did not kick in. This was a "< instead of <=" error;
2012 in most cases the first failure would have been in the next clock tick
2013 after the received time, and all would be well.
2014
201515. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2016 being recognized when the domain list was tested by the match_domain
2017 condition in an expansion string.
2018
201916. Added the ${str2b64: operator.
2020
202117. Exim was always calling setrlimit() to set a large limit for the number of
2022 processes, without checking whether the existing limit was already
2023 adequate. (It did check for the limit on file descriptors.) Furthermore,
2024 errors from getrlimit() and setrlimit() were being ignored. Now they are
2025 logged to the main and panic logs, but Exim does carry on, to try to do its
2026 job under whatever limits there are.
2027
202818. Imported PCRE 5.0.
2029
203019. Trivial typo in log message " temporarily refused connection" (the leading
2031 space).
2032
203320. If the log selector return_path_on_delivery was set and an address was
2034 redirected to /dev/null, the delivery process crashed because it assumed
2035 that a return path would always be set for a "successful" delivery. In this
2036 case, the whole delivery is bypassed as an optimization, and therefore no
2037 return path is set.
2038
203921. Internal re-arrangement: the function for sending a challenge and reading
2040 a response while authentication was assuming a zero-terminated challenge
2041 string. It's now changed to take a pointer and a length, to allow for
2042 binary data in such strings.
2043
204422. Added the cyrus_sasl authenticator (code supplied by MBM).
2045
204623. Exim was not respecting finduser_retries when seeking the login of the
2047 uid under which it was called; it was always trying 10 times. (The default
2048 setting of finduser_retries is zero.) Also, it was sleeping after the final
2049 failure, which is pointless.
2050
205124. Implemented tls_on_connect_ports.
2052
205325. Implemented acl_smtp_predata.
2054
205526. If the domain in control=submission is set empty, Exim assumes that the
2056 authenticated id is a complete email address when it generates From: or
2057 Sender: header lines.
2058
205927. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2060 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2061 chown and chgrp in /bin and hostname in /usr/bin.
2062
206328. Exim was keeping the "process log" file open after each use, just as it
2064 does for the main log. This opens the possibility of it remaining open for
2065 long periods when the USR1 signal hits a daemon. Occasional processlog
2066 errors were reported, that could have been caused by this. Anyway, it seems
2067 much more sensible not to leave this file open at all, so that is what now
2068 happens.
2069
207029. The long-running daemon process does not normally write to the log once it
2071 has entered its main loop, and it closes the log before doing so. This is
2072 so that log files can straightforwardly be renamed and moved. However,
2073 there are a couple of unusual error situations where the daemon does write
2074 log entries, and I had neglected to close the log afterwards.
2075
207630. The text of an SMTP error response that was received during a remote
2077 delivery was being truncated at 512 bytes. This is too short for some of
2078 the long messages that one sometimes sees. I've increased the limit to
2079 1024.
2080
208131. It is now possible to make retry rules that apply only when a message has a
2082 specific sender, in particular, an empty sender.
2083
208432. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2085 it possible to be selective about when SMTP synchronization is enforced.
2086
208733. Added "control = caseful_local_part" and "control = "caselower_local_part".
2088
208932. Implemented hosts_connection_nolog.
2090
209133. Added an ACL for QUIT.
2092
209334. Setting "delay_warning=" to disable warnings was not working; it gave a
2094 syntax error.
2095
209635. Added mailbox_size and mailbox_filecount to appendfile.
2097
209836. Added control = no_multiline_responses to ACLs.
2099
210037. There was a bug in the logic of the code that waits for the clock to tick
2101 in the case where the clock went backwards by a substantial amount such
2102 that the microsecond fraction of "now" was more than the microsecond
2103 fraction of "then" (but the whole seconds number was less).
2104
210538. Added support for the libradius Radius client library this is found on
2106 FreeBSD (previously only the radiusclient library was supported).
2107
2108
2109Exim version 4.42
2110-----------------
2111
2112 1. When certain lookups returned multiple values in the form name=value, the
2113 quoting of the values was not always being done properly. Specifically:
2114 (a) If the value started with a double quote, but contained no whitespace,
2115 it was not quoted.
2116 (b) If the value contained whitespace other than a space character (i.e.
2117 tabs or newlines or carriage returns) it was not quoted.
2118 This fix has been applied to the mysql and pgsql lookups by writing a
2119 separate quoting function and calling it from the lookup code. The fix
2120 should probably also be applied to nisplus, ibase and oracle lookups, but
2121 since I cannot test any of those, I have not disturbed their existing code.
2122
2123 2. A hit in the callout cache for a specific address caused a log line with no
2124 reason for rejecting RCPT. Now it says "Previous (cached) callout
2125 verification failure".
2126
2127 3. There was an off-by-one bug in the queryprogram router. An over-long
2128 return line was truncated at 256 instead of 255 characters, thereby
2129 overflowing its buffer with the terminating zero. As well as fixing this, I
2130 have increased the buffer size to 1024 (and made a note to document this).
2131
2132 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2133 when Exim is waiting for an SMTP response from a remote server, Exim
2134 restarts its select() call on the socket, thereby resetting its timeout.
2135 This is not a problem when such interrupts are rare. Somebody set up a cron
2136 job to run exiwhat every 2 minutes, which is less than the normal select()
2137 timeout (5 or 10 minutes). This meant that the select() timeout never
2138 kicked in because it was always reset. I have fixed this by comparing the
2139 time when an interrupt arrives with the time at the start of the first call
2140 to select(). If more time than the timeout has elapsed, the interrupt is
2141 treated as a timeout.
2142
2143 5. Some internal re-factoring in preparation for the addition of Sieve
2144 extensions (by MH). In particular, the "personal" test is moved to a
2145 separate function, and given an option for scanning Cc: and Bcc: (which is
2146 not set for Exim filters).
2147
2148 6. When Exim created an email address using the login of the caller as the
2149 local part (e.g. when creating a From: or Sender: header line), it was not
2150 quoting the local part when it contained special characters such as @.
2151
2152 7. Installed new OpenBSD configuration files.
2153
2154 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2155 try to make them clearer.
2156
2157 9. Callout options, other than the timeout value, were being ignored when
2158 verifying sender addresses in header lines. For example, when using
2159
2160 verify = header_sender/callout=no_cache
2161
2162 the cache was (incorrectly) being used.
2163
216410. Added a missing instance of ${EXE} to the exim_install script; this affects
2165 only the Cygwin environment.
2166
216711. When return_path_on_delivery was set as a log selector, if different remote
2168 addresses in the same message used different return paths and parallel
2169 remote delivery occurred, the wrong values would sometimes be logged.
2170 (Whenever a remote delivery process finished, the return path value from
2171 the most recently started remote delivery process was logged.)
2172
217312. RFC 3848 specifies standard names for the "with" phrase in Received: header
2174 lines when AUTH and/or TLS are in use. This is the "received protocol"
2175 field. Exim used to use "asmtp" for authenticated SMTP, without any
2176 indication (in the protocol name) for TLS use. Now it follows the RFC and
2177 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2178 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2179 names appear in log lines as well as in Received: header lines.
2180
218113. Installed MH's patches for Sieve to add the "copy" and "vacation"
2182 extensions, and comparison tests, and to fix some bugs.
2183
218414. Changes to the "personal" filter test:
2185
2186 (1) The test was buggy in that it was just doing the equivalent of
2187 "contains" tests on header lines. For example, if a user's address was
2188 anne@some.where, the "personal" test would incorrectly be true for
2189
2190 To: susanne@some.where
2191
2192 This test is now done by extracting each address from the header in turn,
2193 and checking the entire address. Other tests that are part of "personal"
2194 are now done using regular expressions (for example, to check local parts
2195 of addresses in From: header lines).
2196
2197 (2) The list of non-personal local parts in From: addresses has been
2198 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2199 taken from the Sieve specification recommendations.
2200
2201 (3) If the message contains any header line starting with "List-" it is
2202 treated as non-personal.
2203
2204 (4) The test for "circular" in the Subject: header line has been removed
2205 because it now seems ill-conceived.
2206
220715. Minor typos in src/EDITME comments corrected.
2208
220916. Installed latest exipick from John Jetmore.
2210
221117. If headers_add on a router specified a text string that was too long for
2212 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2213 of string_sprintf() is now avoided.
2214
221518. $message_body_size was not set (it was always zero) when running the DATA
2216 ACL and the local_scan() function.
2217
221819. For the "mail" command in an Exim filter, no default was being set for
2219 the once_repeat time, causing a random time value to be used if "once" was
2220 specified. (If the value happened to be <= 0, no repeat happened.) The
2221 default is now 0s, meaning "never repeat". The "vacation" command was OK
2222 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2223 (I found it when inspecting the code).
2224
222520. There is now an overall timeout for performing a callout verification. It
2226 defaults to 4 times the callout timeout, which applies to individual SMTP
2227 commands during the callout. The overall timeout applies when there is more
2228 than one host that can be tried. The timeout is checked before trying the
2229 next host. This prevents very long delays if there are a large number of
2230 hosts and all are timing out (e.g. when the network connections are timing
2231 out). The value of the overall timeout can be changed by specifying an
2232 additional sub-option for "callout", called "maxwait". For example:
2233
2234 verify = sender/callout=5s,maxwait=20s
2235
223621. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2237 to the end before writing, but this should make it even safer).
2238
223922. Exim was forgetting that it had advertised PIPELINING for the second and
2240 subsequent messages on an SMTP connection. It was also not resetting its
2241 memory on STARTTLS and an internal HELO.
2242
224323. When Exim logs an SMTP synchronization error within a session, it now
2244 records whether PIPELINING has been advertised or not.
2245
224624. Added 3 instances of "(long int)" casts to time_t variables that were being
2247 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2248 rather than long int.
2249
225025. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2251
225226. Added the never_mail option to autoreply.
2253
2254
2255Exim version 4.41
2256-----------------
2257
2258 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2259 crash if the getsockname() call failed; this can happen if a connection is
2260 closed very soon after it is established. The problem was simply in the
2261 order in which certain operations were done, causing Exim to try to write
2262 to the SMTP stream before it had set up the file descriptor. The bug has
2263 been fixed by making things happen in the correct order.
2264
2265
2266Exim version 4.40
2267-----------------
2268
2269 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2270 before the connection was closed, thus losing the rejection response.
2271
2272 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2273 some early Solaris releases, but causes trouble in current releases where
2274 socklen_t is defined.
2275
2276 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2277 always exist.
2278
2279 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2280 configured.
2281
2282 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2283 that releasing the top of it at the end releases what was used for sub-
2284 expansions (unless the block got too big). However, discard this block if
2285 the first thing is a variable or header, so that we can use its block when
2286 it is dynamic (useful for very large $message_headers, for example).
2287
2288 6. Lookups now cache *every* query, not just the most recent. A new, separate
2289 store pool is used for this. It can be recovered when all lookup caches are
2290 flushed. Lookups now release memory at the end of their result strings.
2291 This has involved some general refactoring of the lookup sources.
2292
2293 7. Some code has been added to the store_xxx() functions to reduce the amount
2294 of flapping under certain conditions.
2295
2296 8. log_incoming_interface used to affect only the <= reception log lines. Now
2297 it causes the local interface and port to be added to several more SMTP log
2298 lines, for example "SMTP connection from", and rejection lines.
2299
2300 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2301
230210. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2303
230411. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2305 could be overwritten at the end of the current message (or the start of a
2306 new message if it was set in a HELO ACL). The value is now preserved for
2307 the duration of the SMTP connection.
2308
230912. If a transport had a headers_rewrite setting, and a matching header line
2310 contained an unqualified address, that address was qualified, even if it
2311 did not match any rewriting rules. The underlying bug was that the values
2312 of the flags that permit the existence of unqualified sender and recipient
2313 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2314 non-local messages, and by -bnq for local messages) were not being
2315 preserved with the message after it was received.
2316
231713. When Exim was logging an SMTP synchronization error, it could sometimes log
2318 "next input=" as part of the text comprising the host identity instead of
2319 the correct text. The code was using the same buffer for two different
2320 strings. However, depending on which order the printing function evaluated
2321 its arguments, the bug did not always show up. Under Linux, for example, my
2322 test suite worked just fine.
2323
232414. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2325 doesn't work with some older versions of Perl. It has been changed to "my",
2326 which in any case is probably the better facility to use.
2327
232815. A really picky compiler found some instances of statements for creating
2329 error messages that either had too many or two few arguments for the format
2330 string.
2331
233216. The size of the buffer for calls to the DNS resolver has been increased
2333 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2334 for addresses that have a lot of PTR records. This alleviates a problem; it
2335 does not fully solve it.
2336
233717. A dnsdb lookup for PTR records that receives more data than will fit in the
2338 buffer now truncates the list and logs the incident, which is the same
2339 action as happens when Exim is looking up a host name and its aliases.
2340 Previously in this situation something unpredictable would happen;
2341 sometimes it was "internal error: store_reset failed".
2342
234318. If a server dropped the connection unexpectedly when an Exim client was
2344 using GnuTLS and trying to read a response, the client delivery process
2345 crashed while trying to generate an error log message.
2346
234719. If a "warn" verb in an ACL added multiple headers to a message in a single
2348 string, for example:
2349
2350 warn message = H1: something\nH2: something
2351
2352 the text was added as a single header line from Exim's point of view
2353 though it ended up OK in the delivered message. However, searching for the
2354 second and subsequent header lines using $h_h2: did not work. This has been
2355 fixed. Similarly, if a system filter added multiple headers in this way,
2356 the routers could not see them.
2357
235820. Expanded the error message when iplsearch is called with an invalid key to
2359 suggest using net-iplsearch in a host list.
2360
236121. When running tests using -bh, any delays imposed by "delay" modifiers in
2362 ACLs are no longer actually imposed (and a message to that effect is
2363 output).
2364
236522. If a "gecos" field in a passwd entry contained escaped characters, in
2366 particular, if it contained a \" sequence, Exim got it wrong when building
2367 a From: or a Sender: header from that name. A second bug also caused
2368 incorrect handling when an unquoted " was present following a character
2369 that needed quoting.
2370
237123. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2372 was not being matched caselessly.
2373
237424. Arranged for all hyphens in the exim.8 source to be escaped with
2375 backslashes.
2376
237725. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2378 properly. Recipient callout cache records were still being keyed to include
2379 the sender, even when use_sender was set false. This led to far more
2380 callouts that were necessary. The sender is no longer included in the key
2381 when use_sender is false.
2382
238326. Added "control = submission" modifier to ACLs.
2384
238527. Added the ${base62d: operator to decode base 62 numbers.
2386
238728. dnsdb lookups can now access SRV records.
2388
238929. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2390 the configuration file.
2391
239230. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2393 (-v) mode. This makes the output for a verbose queue run more intelligible.
2394
239531. Added a use_postmaster feature to recipient callouts.
2396
239732. Added the $body_zerocount variable, containing the number of binary zero
2398 bytes in the message body.
2399
240033. The time of last modification of the "new" subdirectory is now used as the
2401 "mailbox time last read" when there is a quota error for a maildir
2402 delivery.
2403
240434. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2405
240635. Added +ignore_unknown as a special item in host lists.
2407
240836. Code for decoding IPv6 addresses in host lists is now included, even if
2409 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2410 address was recognized as an IP address, but was then not correctly decoded
2411 into binary, causing unexpected and incorrect effects when compared with
2412 another IP address.
2413
2414
2415Exim version 4.34
2416-----------------
2417
2418 1. Very minor rewording of debugging text in manualroute to say "list of
2419 hosts" instead of "hostlist".
2420
2421 2. If verify=header_syntax was set, and a header line with an unqualified
2422 address (no domain) and a large number of spaces between the end of the
2423 name and the colon was received, the reception process suffered a buffer
2424 overflow, and (when I tested it) crashed. This was caused by some obsolete
2425 code that should have been removed. The fix is to remove it!
2426
2427 3. When running in the test harness, delay a bit after writing a bounce
2428 message to get a bit more predictability in the log output.
2429
2430 4. Added a call to search_tidyup() just before forking a reception process. In
2431 theory, someone could use a lookup in the expansion of smtp_accept_max_
2432 per_host which, without the tidyup, could leave open a database connection.
2433
2434 5. Added the variables $recipient_data and $sender_data which get set from a
2435 lookup success in an ACL "recipients" or "senders" condition, or a router
2436 "senders" option, similar to $domain_data and $local_part_data.
2437
2438 6. Moved the writing of debug_print from before to after the "senders" test
2439 for routers.
2440
2441 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2442 problems for message scanning, either using a data ACL, or using
2443 local_scan() because the Received: header was not generated till after they
2444 were called (in order to set the time as the time of reception completion).
2445 I have revised the way this works. The header is now generated after the
2446 body is received, but before the ACL or local_scan() are called. After they
2447 are run, the timestamp in the header is updated.
2448
2449
2450Exim version 4.33
2451-----------------
2452
2453 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2454 before starting a queue runner without re-exec. This happened only when
2455 deliver_drop_privilege was set or when the Exim user was set to root. The
2456 effect of the bug was that timeouts during subsequent deliveries caused
2457 crashes instead of being properly handled. The handler is now left at its
2458 default (and expected) setting.
2459
2460 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2461 message, again when deliver_drop_privilege is set or Exim is run as root.
2462 The bug described in (1) was not present in this case, but the tidying up
2463 of the other signals was missing. I have made the two cases consistent.
2464
2465 3. The ignore_target_hosts setting on a manualroute router was being ignored
2466 for hosts that were looked up using the /MX notation.
2467
2468 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2469 in domain lists.
2470
2471 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2472 operated on the sender address. After changing the $sender_address to <>
2473 for the sender address verify, Exim was re-instated it as the original
2474 (before rewriting) address, but remembering that it had rewritten it, so it
2475 wasn't rewriting it again. This bug also had the effect of breaking the
2476 sender address verification caching when the sender address was rewritten.
2477
2478 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2479 This has been changed so that if the ip literal address matches
2480 ignore_target_hosts, the router declines.
2481
2482 7. Added expansion conditions match_domain, match_address, and match_local_
2483 part (NOT match_host).
2484
2485 8. The placeholder for the Received: header didn't have a length field set.
2486
2487 9. Added code to Exim itself and to exim_lock to test for a specific race
2488 condition that could lead to file corruption when using MBX delivery. The
2489 issue is with the lockfile that is created in /tmp. If this file is removed
2490 after a process has opened it but before that process has acquired a lock,
2491 there is the potential for a second process to recreate the file and also
2492 acquire a lock. This could lead to two Exim processes writing to the file
2493 at the same time. The added code performs the same test as UW imapd; it
2494 checks after acquiring the lock that its file descriptor still refers to
2495 the same named file.
2496
249710. The buffer for building added header lines was of fixed size, 8192 bytes.
2498 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2499 when Exim is built.
2500
250111. Added the smtp_active_hostname option. If used, this will typically be made
2502 to depend on the incoming interface address. Because $interface_address is
2503 not set up until the daemon has forked a reception process, error responses
2504 that can happen earlier (such as "too many connections") no longer contain
2505 a host name.
2506
250712. If an expansion in a condition on a "warn" statement fails because a lookup
2508 defers, the "warn" statement is abandoned, and the next ACL statement is
2509 processed. Previously this caused the whole ACL to be aborted.
2510
251113. Added the iplsearch lookup type.
2512
251314. Added ident_timeout as a log selector.
2514
251515. Added tls_certificate_verified as a log selector.
2516
251716. Added a global option tls_require_ciphers (compare the smtp transport
2518 option of the same name). This controls incoming TLS connections.
2519
252017. I finally figured out how to make tls_require_ciphers do a similar thing
2521 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2522 before starting the TLS session.
2523
252418. Tabs are now shown as \t in -bP output.
2525
252619. If the log selector return_path_on_delivery was set, Exim crashed when
2527 bouncing a message because it had too many Received: header lines.
2528
252920. If two routers both had headers_remove settings, and the first one included
2530 a superfluous trailing colon, the final name in the first list and the
2531 first name in the second list were incorrectly joined into one item (with a
2532 colon in the middle).
2533
2534
2535Exim version 4.32
2536-----------------
2537
2538 1. Added -C and -D options to the exinext utility, mainly to make it easier
2539 to include in the automated testing, but these could be helpful when
2540 multiple configurations are in use.
2541
2542 2. The exinext utility was not formatting the output nicely when there was
2543 an alternate port involved in the retry record key, nor when there was a
2544 message id as well (for retries that were specific to a specific message
2545 and a specific host). It was also confused by IPv6 addresses, because of
2546 the additional colons they contain. I have fixed the IPv4 problem, and
2547 patched it up to do a reasonable job for IPv6.
2548
2549 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2550 delivery, the log line now contains "pipelined" if PIPELINING was used.
2551
2552 4. An SMTP transport process used to panic and die if the bind() call to set
2553 an explicit outgoing interface failed. This has been changed; it is now
2554 treated in the same way as a connect() failure.
2555
2556 5. A reference to $sender_host_name in the part of a conditional expansion
2557 that was being skipped was still causing a DNS lookup. This no longer
2558 occurs.
2559
2560 6. The def: expansion condition was not recognizing references to header lines
2561 that used bh_ and bheader_.
2562
2563 7. Added the _cache feature to named lists.
2564
2565 8. The code for checking quota_filecount in the appendfile transport was
2566 allowing one more file than it should have been.
2567
2568 9. For compatibility with Sendmail, the command line option
2569
2570 -prval:sval
2571
2572 is equivalent to
2573
2574 -oMr rval -oMs sval
2575
2576 and sets the incoming protocol and host name (for trusted callers). The
2577 host name and its colon can be omitted when only the protocol is to be set.
2578 Note the Exim already has two private options, -pd and -ps, that refer to
2579 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2580 "s", but I don't think that's a major issue.
2581
258210. A number of refactoring changes to the code, none of which should affect
2583 Exim's behaviour:
2584
2585 (a) The number of logging options was getting close to filling up the
2586 32-bit word that was used as a bit map. I have split them into two classes:
2587 those that are passed in the argument to log_write(), and those that are
2588 only ever tested independently outside of that function. These are now in
2589 separate 32-bit words, so there is plenty of room for expansion again.
2590 There is no change in the user interface or the logging behaviour.
2591
2592 (b) When building, for example, log lines, the code previously used a
2593 macro that called string_cat() twice, in order to add two strings. This is
2594 not really sufficiently general. Furthermore, there was one instance where
2595 it was actually wrong because one of the argument was used twice, and in
2596 one call a function was used. (As it happened, calling the function twice
2597 did not affect the overall behaviour.) The macro has been replaced by a
2598 function that can join an arbitrary number of extra strings onto a growing
2599 string.
2600
2601 (c) The code for expansion conditions now uses a table and a binary chop
2602 instead of a serial search (which was left over from when there were very
2603 few conditions). Also, it now recognizes conditions like "pam" even when
2604 the relevant support is not compiled in: a suitably worded error message is
2605 given if an attempt is made to use such a condition.
2606
260711. Added ${time_interval:xxxxx}.
2608
260912. A bug was causing one of the ddress fields not to be passed back correctly
2610 from remote delivery subprocesses. The field in question was not being
2611 subsequently used, so this caused to problems in practice.
2612
261313. Added new log selectors queue_time and deliver_time.
2614
261514. Might have fixed a bug in maildirsizefile handling that threw up
2616 "unexpected character" debug warnings, and recalculated the data
2617 unnecessarily. In any case, I expanded the warning message to give more
2618 information.
2619
262015. Added the message "Restricted characters in address" to the statements in
2621 the default ACL that block characters like @ and % in local parts.
2622
262316. Change 71 for release 4.31 proved to be much less benign that I imagined.
2624 Three changes have been made:
2625
2626 (a) There was a serious bug; a negative response to MAIL caused the whole
2627 recipient domain to be cached as invalid, thereby blocking all messages
2628 to all local parts at the same domain, from all senders. This bug has
2629 been fixed. The domain is no longer cached after a negative response to
2630 MAIL if the sender used is not empty.
2631
2632 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2633 been restored.
2634
2635 (c) A new callout option, "use_sender" has been added for people who want
2636 the modified behaviour.
2637
2638
2639Exim version 4.31
2640-----------------
2641
2642 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2643 Larry Rosenman.
2644
2645 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2646 indeed breaks things for older releases.
2647
2648 3. Added additional logging to the case where there is a problem reading data
2649 from a filter that is running in a subprocess using a pipe, in order to
2650 try to track down a specific problem.
2651
2652 4. Testing facility fudge: when running in the test harness and attempting
2653 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2654 getting "No route to host". Convert this to a timeout.
2655
2656 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2657 warning.
2658
2659 6. Some OS don't have socklen_t but use size_t instead. This affects the
2660 fifth argument of getsockopt() amongst other things. This is now
2661 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2662 can be set for individual OS. I have set it for SunOS5, OSF1, and
2663 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2664 some earlier ones do not.
2665
2666 7. Change 4.30/15 was not doing the test caselessly.
2667
2668 8. The standard form for an IPv6 address literal was being rejected by address
2669 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2670 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2671 this, as well as the form without the "IPv6" on the front (but only when
2672 address literals are enabled, of course).
2673
2674 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2675
267610. Exim crashed if a message with an empty sender address specified by -f
2677 encountered a router with an errors_to setting. This could be provoked only
2678 by a command such as
2679
2680 exim -f "" ...
2681
2682 where an empty string was supplied; "<>" did not hit this bug.
2683
268411. Installed PCRE release 4.5.
2685
268612. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2687 remained set. It is now erased.
2688
268913. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2690 times from message ids (which are base 36 rather than the normal 62).
2691
269214. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2693 were being counted as actual protocol errors, and logged if the log
2694 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2695 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2696 and DATA following a set of rejected RCPTs do not count as protocol errors.
2697 In other words, Exim assumes they were pipelined, though this may not
2698 actually be the case. Of course, in all cases the client gets an
2699 appropriate error code.
2700
270115. If a lookup fails in an ACL condition, a message about the failure may
2702 be available; it is used if testing the ACL cannot continue, because most
2703 such messages specify what the cause of the deferral is. However, some
2704 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2705 that caused an old message to be retained and used if a later statement
2706 caused a defer, replacing the real cause of the deferral.
2707
270816. If an IP address had so many PTR records that the DNS lookup buffer
2709 was not large enough to hold them, Exim could crash while trying to process
2710 the truncated data. It now detects and logs this case.
2711
271217. Further to 4.21/58, another change has been made: if (and only if) the
2713 first line of a message (the first header line) ends with CRLF, a bare LF
2714 in a subsequent header line has a space inserted after it, so as not to
2715 terminate the header.
2716
271718. Refactoring: tidied an ugly bit of code in appendfile that copied data
2718 unnecessarily, used atoi() instead of strtol(), and didn't check the
2719 termination when getting file sizes from file names by regex.
2720
272119. Completely re-implemented the support for maildirsize files, in the light
2722 of a number of problems with the previous contributed implementation
2723 (4.30/29). In particular:
2724
2725 . If the quota is zero, the maildirsize file is maintained, but no quota is
2726 imposed.
2727
2728 . If the maildir directory does not exist, it is created before any attempt
2729 to write a maildirsize file.
2730
2731 . The quota value in the file is just a cache; if the quota is changed in
2732 the transport, the new value overrides.
2733
2734 . A regular expression is available for excluding directories from the
2735 count.
2736
273720. The autoreply transport checks the characters in options that define the
2738 message's headers; it allows continued headers, but it was checking with
2739 isspace() after an embedded newline instead of explicitly looking for a
2740 space or a tab.
2741
274221. If all the "regular" hosts to which an address was routed had passed their
2743 expiry times, and had not reached their retry times, the address was
2744 bounced, even if fallback hosts were defined. Now Exim should go on to try
2745 the fallback hosts.
2746
274722. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2748 equivalent code in the SMTP transport. Some hosts send humungous responses
2749 to HELO/EHLO, more than 1024 it seems.
2750
275123. Refactoring: code in filter.c used (void *) for "any old type" but this
2752 gives compiler warnings in some environments. I've now done it "properly",
2753 using a union.
2754
275524. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2756 (because of problems with the built-in one) was declared to return uschar *
2757 instead of char *, causing compiler failure.
2758
275925. Fixed a file descriptor leak when processing alias/forward files.
2760
276126. Fixed a minor format string issue in dbfn.c.
2762
276327. Typo in exim.c: ("dmbnz" for "dbmnz").
2764
276528. If a filter file refered to $h_xxx or $message_headers, and the headers
2766 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2767 become corrupted.
2768
276929. When a sender address is verified, it is cached, to save repeating the test
2770 when there is more than one recipient in a message. However, when the
2771 verification involves a callout, it is possible for different callout
2772 options to be set for different recipients. It is too complicated to keep
2773 track of this in the cache, so now Exim always runs a verification when a
2774 callout is required, relying on the callout cache for the optimization.
2775 The overhead is duplication of the address routing, but this should not be
2776 too great.
2777
277830. Fixed a bug in callout caching. If a RCPT command caused the sender address
2779 to be verified with callout=postmaster, and the main callout worked but the
2780 postmaster check failed, the verification correctly failed. However, if a
2781 subsequent RCPT command asked for sender verification *without* the
2782 postmaster check, incorrect caching caused this verification also to fail,
2783 incorrectly.
2784
278531. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2786 it was not caching the DNS options (qualify_single, search_parents) that
2787 were used when the lookup failed. A subsequent lookup with different
2788 options therefore always gave the same answer, though there were cases
2789 where it should not have. (Example: a "domains = !$mx_any" option on a
2790 dnslookup router: the "domains" option is always processed without any
2791 widening, but the router might have qualify_single set.) Now Exim uses the
2792 cached value only when the same options are set.
2793
279432. Added John Jetmore's "exipick" utility to the distribution.
2795
279633. GnuTLS: When an attempt to start a TLS session fails for any reason other
2797 than a timeout (e.g. a certificate is required, and is not provided), an
2798 Exim server now closes the connection immediately. Previously it waited for
2799 the client to close - but if the client is SSL, it seems that they each
2800 wait for each other, leading to a delay before one of them times out.
2801
280234: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2803 maintained 0.8.x compatibility because I don't think many are using it, and
2804 it is clearly obsolete.
2805
280635. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2807 transport.
2808
280936. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2810 client certificate was expired. A simple patch fixes this, though I don't
2811 understand the full logic of why the verify callback is called multiple
2812 times.
2813
281437. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2815 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2816 which causes problems with some clients (such as the Certicom SSL Plus
2817 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2818 disables the coutermeasure allowing Eudora to connect."
2819
282038. Exim was not checking that a write() to a log file succeeded. This could
2821 lead to Bad Things if a log got too big, in particular if it hit a file
2822 size limit. Exim now panics and dies if it cannot write to a log file, just
2823 as it does if it cannot open a log file.
2824
282539. Modified OS/Makefile-Linux so that it now contains
2826
2827 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2828
2829 The two -D definitions ensure that Exim is compiled with large file
2830 support, which makes it possible to handle log files that are bigger than
2831 2^31.
2832
283340. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2834 instance) a domain was checked against a named list that involved a lookup,
2835 causing $domain_data to be set, then another domain was checked against the
2836 same list, then the first domain was re-checked, the value of $domain_data
2837 after the final check could be wrong. In particular, if the second check
2838 failed, it could be set empty. This bug probably also applied to
2839 $localpart_data.
2840
284141. The strip_trailing_dot option was not being applied to the address given
2842 with the -f command-line option.
2843
284442. The code for reading a message's header from the spool was incrementing
2845 $received_count, but never initializing it. This meant that the value was
2846 incorrect (doubled) while delivering a message in the same process in which
2847 it was received. In the most common configuration of Exim, this never
2848 happens - a fresh exec is done - but it can happen when
2849 deliver_drop_privilege is set.
2850
285143. When Exim logs an SMTP synchronization error - client data sent too soon -
2852 it now includes up to 150 characters of the unexpected data in the log
2853 line.
2854
285544. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2856 and building data strings. The size of both of these buffers was 10 000
2857 bytes - far larger than anybody would *ever* want, thought I. Needless to
2858 say, somebody hit the limit. I have increased the maximum line length to
2859 20 000 and the maximum data length of concatenated lines to 100 000. I have
2860 also fixed two bugs, because there was no checking on these buffers. Tsk,
2861 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2862 buffer is too small.
2863
286445. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2865 lsearch lookups. Now it does.
2866
286746. When parsing a route_list item in a manualroute router, a fixed-length
2868 buffer was used for the list of hosts. I made this 1024 bytes long,
2869 thinking that nobody would ever have a list of hosts that long. Wrong.
2870 Somebody had a whole pile of complicated expansion conditions, and the
2871 string was silently truncated, leading to an expansion error. It turns out
2872 that it is easier to change to an unlimited length (owing to other changes
2873 that have happened since this code was originally written) than to build
2874 structure for giving a limitation error. The length of the item that
2875 expands into the list of hosts is now unlimited.
2876
287747. The lsearch lookup could not handle data where the length of text line was
2878 more than 4095 characters. Such lines were truncated, leading to shortened
2879 data being returned. It should now handle lines of any length.
2880
288148. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2882 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2883 ACL").
2884
288549. Cosmetic tidy to scripts like exicyclog that are generated by globally
2886 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2887 no longer happens in comment lines. A list of replacements is now placed
2888 at the head of all of the source files, except those whose only change is
2889 to replace PERL_COMMAND in the very first #! line.
2890
289150. Replaced the slow insertion sort in queue.c, for sorting the list of
2892 messages on the queue, with a bottom-up merge sort, using code contributed
2893 by Michael Haardt. This should make operations like -bp somewhat faster on
2894 large queues. It won't affect queue runners, except when queue_run_in_order
2895 is set.
2896
289751. Installed eximstats 1.31 in the distribution.
2898
289952. Added support for SRV lookups to the dnslookup router.
2900
290153. If an ACL referred to $message_body or $message_body_end, the value was not
2902 reset for any messages that followed in the same SMTP session.
2903
290454. The store-handling optimization for building very long strings was not
2905 differentiating between the different store pools. I don't think this
2906 actually made any difference in practice, but I've tidied it.
2907
290855. While running the routers to verify a sender address, $sender_address
2909 was still set to the sender address. This is wrong, because when routing to
2910 send a bounce to the sender, it would be empty. Therefore, I have changed
2911 it so that, while verifying a sender address, $sender_address is set to <>.
2912 (There is no change to what happens when verifying a recipient address.)
2913
291456. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2915 target A or AAAA records (if not already returned) without resetting the
2916 qualify_single or search_parents options of the DNS resolver. These are
2917 inappropriate in this case because the targets of MX and SRV records must
2918 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2919 target that, when qualified, matched something in the local domain. These
2920 two options are now turned off when doing these lookups.
2921
292257. It seems that at least some releases of Reiserfs (which does not have the
2923 concept of a fixed number of inodes) returns zero and not -1 for the
2924 number of available inodes. This interacted badly with check_spool_inodes,
2925 which assumed that -1 was the "no such thing" setting. What I have done is
2926 to check that the total number of inodes is greater than zero before doing
2927 the test of how many are available.
2928
292958. When a "warn" ACL statement has a log_message modifier, the message is
2930 remembered, and not repeated. This is to avoid a lot of repetition when a
2931 message has many recipients that cause the same warning to be written.
2932 Howewer, Exim was preserving the list of already written lines for an
2933 entire SMTP session, which doesn't seem right. The memory is now reset if a
2934 new message is started.
2935
293659. The "rewrite" debugging flag was not showing the result of rewriting in the
2937 debugging output unless log_rewrite was also set.
2938
293960. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2940 of (int)(handle) when we know that handle contains (void *)(-1).
2941
294261. The Exim daemon panic-logs an error return when it closes the incoming
2943 connection. However "connection reset by peer" seems to be common, and
2944 isn't really an error worthy of noting specially, so that particular error
2945 is no long logged.
2946
294762. When Exim is trying to find all the local interfaces, it used to panic and
2948 die if the ioctl to get the interface flags failed. However, it seems that
2949 on at least one OS (Solaris 9) it is possible to have an interface that is
2950 included in the list of interfaces, but for which you get a failure error
2951 for this call. This happens when the interface is not "plumbed" into a
2952 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2953 failure of the "get flags" call assumes that the interface is down.
2954
295563. Added a ${eval10: operator, which assumes all numbers are decimal. This
2956 makes life easier for people who are doing arithmetic on fields extracted
2957 from dates, where you often get leading zeros that should not be
2958 interpreted as octal.
2959
296064. Added qualify_domain to the redirect router, to override the global
2961 setting.
2962
296365. If a pathologically long header line contained very many addresses (the
2964 report of this problem mentioned 10 000) and each of them was rewritten,
2965 Exim could use up a very large amount of memory. (It kept on making new
2966 copies of the header line as it rewrote, and never released the old ones.)
2967 At the expense of a bit more processing, the header rewriting function has
2968 been changed so that it no longer eats memory in this way.
2969
297066. The generation of the Received: header has been moved from the time that a
2971 message starts to be received, to the time that it finishes. The timestamp
2972 in the Received: header should now be very close to that of the <= log
2973 line. There are two side-effects of this change:
2974
2975 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2976 logged header lines no longer include the local Received: line, because
2977 it has not yet been created. The same applies to a copy of the message
2978 that is returned to a non-SMTP sender when a message is rejected.
2979
2980 (b) When a filter file is tested using -bf, no additional Received: header
2981 is added to the test message. After some thought, I decided that this
2982 is a bug fix.
2983
2984 This change does not affect the value of $received_for. It is still set
2985 after address rewriting, but before local_scan() is called.
2986
298767. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2988
298968. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2990 gave an unhelpful panic error message, and a defer error. I have managed to
2991 change this behaviour so that it now rejects any supplied certificate,
2992 which seems right, as the list of acceptable certificates is empty.
2993
299469. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2995 gave an unhelpful defer error. I have not managed to make this reject any
2996 supplied certificates, but the error message it gives is "no certificate
2997 supplied", which is not helpful.
2998
299970. exigrep's output now also includes lines that are not associated with any
3000 message, but which match the given pattern. Implemented by a patch from
3001 Martin Sluka, which also tidied up the Perl a bit.
3002
300371. Recipient callout verification, like sender verification, was using <> in
3004 the MAIL FROM command. This isn't really the right thing, since the actual
3005 sender may affect whether the remote host accepts the recipient or not. I
3006 have changed it to use the actual sender in the callout; this means that
3007 the cache record is now keyed on a recipient/sender pair, not just the
3008 recipient address. There doesn't seem to be a real danger of callout loops,
3009 since a callout by the remote host to check the sender would use <>.
3010 [SEE ABOVE: changed after hitting problems.]
3011
301272. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3013 temporary errors. However, in the case of such a code being given after
3014 the end of a data transmission (i.e. after ".") Exim was failing to write
3015 a retry record for the message. (Yes, there was some broken host that was
3016 actually sending 8xx at this point.)
3017
301873. An unknown lookup type in a host list could cause Exim to panic-die when
3019 the list was checked. (An example that provoked this was putting <; in the
3020 middle of a list instead of at the start.) If this happened during a DATA
3021 ACL check, a -D file could be left lying around. This kind of configuration
3022 error no longer causes Exim to die; instead it causes a defer errror. The
3023 incident is still logged to the main and panic logs.
3024
302574. Buglet left over from Exim 3 conversion. The message "too many messages
3026 in one connection" was written to the rejectlog but not the mainlog, except
3027 when address rewriting (yes!) was being logged.
3028
302975. Added write_rejectlog option.
3030
303176. When a system filter was run not as root (that is, when system_filter_user
3032 was set), the values of the $n variables were not being returned to the
3033 main process; thus, they were not subsequently available in the $sn
3034 variables.
3035
303677. Added +return_path_on_delivery log selector.
3037
303878. A connection timeout was being treated differently from recipients deferred
3039 when testing hosts_max_try with a message that was older than the host's
3040 retry timeout. (The host should not be counted, thus allowing all hosts to
3041 be tried at least once before bouncing.) This may have been the cause of an
3042 occasionally reported bug whereby a message would remain on the queue
3043 longer than the retry timeout, but would be bounced if a delivery was
3044 forced. I say "may" because I never totally pinned down the problem;
3045 setting up timeout/retry tests is difficult. See also the next item.
3046
304779. The ultimate address timeout was not being applied to errors that involved
3048 a combination of host plus message (for example, a timeout on a MAIL
3049 command). When an address resolved to a number of possible hosts, and they
3050 were not all tried for each delivery (e.g. because of hosts_max_try), a
3051 message could remain on the queue longer than the retry timeout.
3052
305380. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3054 Haardt.
3055
305681. Fixed an obscure SMTP outgoing bug which required at least the following
3057 conditions: (a) there was another message waiting for the same server;
3058 (b) the server returned 5xx to all RCPT commands in the first message so
3059 that the message was not completed; (c) the server dropped the connection
3060 or gave a negative response to the RSET that Exim sends to abort the
3061 transaction. The observed case was a dropped connection after DATA that had
3062 been sent in pipelining mode. That is, the server had advertised PIPELINING
3063 but was not implementing it correctly. The effect of the bug was incorrect
3064 behaviour, such as trying another host, and this could lead to a crash.
3065
3066
3067Exim version 4.30
3068-----------------
3069
3070 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3071 and daemon.c were passed as pointers to ints; they should have been
3072 pointers to socklen_t variables (which are typically unsigned ints).
3073
3074 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3075 fixed.
3076
3077 3. Fixed a really odd bug that affected only the testing scheme; patching a
3078 certain fixed string in the binary changed the value of another string that
3079 happened to be identical to the end of the original first string.
3080
3081 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3082 name", it returns that address as the IP address. On some operating
3083 systems (e.g. Solaris), it also passes back the IP address string as the
3084 "host name". However, on others (e.g. Linux), it passes back an empty
3085 string. Exim wasn't checking for this, and was changing the host name to an
3086 empty string, assuming it had been canonicized.
3087
3088 5. Although rare, it is permitted to have more than one PTR record for a given
3089 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3090 all the names associated with an address, because they do in Solaris.
3091 However, it seems that they do not in Linux for data that comes from the
3092 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3093 I found this out when I moved to a new Linux workstation and tried to run
3094 the Exim test suite.
3095
3096 To get round this problem I have changed the code so that it now does its
3097 own call to the DNS to look up PTR records when searching for a host name.
3098 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3099 addresses that are only in /etc/hosts are still found.
3100
3101 This behaviour is, however, controlled by an option called host_lookup_
3102 order, which defaults to "bydns:byaddr". If people want to use the other
3103 order, or indeed, just use one or the other means of lookup, they can
3104 specify it in this variable.
3105
3106 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3107 some operating systems, this comes back from gethostbyaddr() as an empty
3108 string, and this is what Exim used to test for. However, it seems that in
3109 other systems, "." is yielded. Exim now tests for this case too.
3110
3111 7. The values of check_spool_space and check_log_space are now held internally
3112 as a number of kilobytes instead of an absolute number of bytes. If a
3113 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3114 kilobyte. This means that much larger values can be stored.
3115
3116 8. Exim monitor: an attempt to get the action menu when not actually pointing
3117 at a message produces an empty menu entitled "No message selected". This
3118 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3119 no entries in it ("Shell widget menu has zero width and/or height"). So I
3120 have added a single, blank menu entry in this case.
3121
3122 9. Added ${quote_local_part.
3123
312410. MIME decoding is now applied to the contents of Subject: header lines when
3125 they are logged.
3126
312711. Now that a reference to $sender_host_address automatically causes a reverse
3128 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3129 host lookup before query-style lookups in lists that might use this
3130 variable. This has therefore been abolished, and the "net-" prefix is no
3131 longer necessary for query-style lookups.
3132
313312. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3134 have been a typo for LFLAGS, so it has been changed.
3135
313613. The install script calls Exim with "-C /dev/null" in order to find the
3137 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3138 to be output. Howeve, since Exim outputs its version number before the
3139 error, it didn't break the script. It just looked ugly. I fixed this by
3140 always allowing "-C /dev/null" if the caller is root.
3141
314214. Ignore overlarge ACL variable number when reading spool file - insurance
3143 against a later release with more variables having written the file.
3144
314515. The standard form for an IPv6 address literal was being rejected by EHLO.
3146 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3147 this, as well as the form without the "IPv6" on the front.
3148
314916. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3150 OS/Makefile-Darwin file.
3151
315217. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3153 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3154
315518. After change 4.21/52, "%ld" was used to format the contents of the $inode
3156 variable. However, some OS use ints for inodes. I've added cast to long int
3157 to get rid of the compiler warning.
3158
315919. I had forgotten to lock out "/../" in configuration file names when
3160 ALT_CONFIG_PREFIX was set.
3161
316220. Routers used for verification do not need to specify transports. However,
3163 if such a router generated a host list, and callout was configured, Exim
3164 crashed, because it could not find a port number from the (non-existent)
3165 transport. It now assumes port 25 in this circumstance.
3166
316721. Added the -t option to exigrep.
3168
316922. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3170 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3171 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3172 them is set, LOOKUP_LSEARCH is forced.
3173
317423. "exim -bV" now outputs a list of lookups that are included in the binary.
3175
317624. Added sender and host information to the "rejected by local_scan()" log
3177 line; previously there was no indication of these.
3178
317925. Added .include_if_exists.
3180
318126. Change 3.952/11 added an explicit directory sync on top of a file sync for
3182 Linux. It turns out that not all file systems support this. Apparently some
3183 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3184 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3185 not supported on the file descriptor, is now ignored when Exim is trying to
3186 sync a directory. This applies only to Linux.
3187
318827. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3189
319028. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3191 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3192 this.
3193
319429. Added support for maildirsize files from supplied patch (modified a bit).
3195
319630. The use of :fail: followed by an empty string could lead Exim to respond to
3197 sender verification failures with (e.g.):
3198
3199 550 Verification failed for <xxx>
3200 550 Sender verify failed
3201
3202 where the first response line was missing the '-' that indicates it is not
3203 the final line of the response.
3204
320531. The loop for finding the name of the user that called Exim had a hardwired
3206 limit of 10; it now uses the value of finduser_retries, which is used for
3207 all other user lookups.
3208
320932. Added $received_count variable, available in data and not_smtp ACLs, and at
3210 delivery time.
3211
321233. Exim was neglecting to zero errno before one call of strtol() when
3213 expanding a string and expecting an integer value. On some systems this
3214 resulted in spurious "integer overflow" errors. Also, it was casting the
3215 result into an int without checking.
3216
321734. Testing for a connection timeout using "timeout_connect" in the retry rules
3218 did not work. The code looks as if it has *never* worked, though it appears
3219 to have been documented since at least releast 1.62. I have made it work.
3220
322135. The "timeout_DNS" error in retry rules, also documented since at least
3222 1.62, also never worked. As it isn't clear exactly what this means, and
3223 clearly it isn't a major issue, I have abolished the feature by treating it
3224 as "timeout", and writing a warning to the main and panic logs.
3225
322636. The display of retry rules for -brt wasn't always showing the error code
3227 correctly.
3228
322937. Added new error conditions to retry rules: timeout_A, timeout_MX,
3230 timeout_connect_A, timeout_connect_MX.
3231
323238. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3233 to the empty sender.
3234
323539. The daemon was not analysing the content of -oX till after it had closed
3236 stderr and disconnected from the controlling terminal. This meant that any
3237 syntax errors were only noted on the panic log, and the return code from
3238 the command was 0. By re-arranging the code a little, I've made the
3239 decoding happen first, so such errors now appear on stderr, and the return
3240 code is 1. However, the actual setting up of the sockets still happens in
3241 the disconnected process, so errors there are still only recorded on the
3242 panic log.
3243
324440. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3245 connections (as happens on some IP stacks) was logged at start up time as
3246 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3247 it from "IPv6 and IPv4", which means that two separate sockets are being
3248 used.
3249
325041. The debug output for gethostbyname2() or getipnodebyname() failures now
3251 says whether AF_INET or AF_INET6 was passed as an argument.
3252
325342. Exiwhat output was messed up when time zones were included in log
3254 timestamps.
3255
325643. Exiwhat now gives more information about the daemon's listening ports,
3257 and whether -tls-on-connect was used.
3258
325944. The "port" option of the smtp transport is now expanded.
3260
326145. A "message" modifier in a "warn" statement in a non-message ACL was being
3262 silently ignored. Now an error message is written to the main and panic
3263 logs.
3264
326546. There's a new ACL modifier called "logwrite" which writes to a log file
3266 as soon as it is encountered.
3267
326847. Added $local_user_uid and $local_user_gid at routing time.
3269
327048. Exim crashed when trying to verify a sender address that was being
3271 rewritten to "<>".
3272
327349. Exim was recognizing only a space character after ".include". It now also
3274 recognizes a tab character.
3275
327650. Fixed several bugs in the Perl script that creates the exim.8 man page by
3277 extracting the relevant information from the specification. The man page no
3278 longer contains scrambled data for the -d option, and I've added a section
3279 at the front about calling Exim under different names.
3280
328151. Added "extra_headers" argument to the "mail" command in filter files.
3282
328352. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3284 crash.
3285
328653. Installed eximstats 1.29.
3287
328854. Added transport_filter_timeout as a generic transport option.
3289
329055. Exim no longer adds an empty Bcc: header to messages that have no To: or
3291 Cc: header lines. This was required by RFC 822, but it not required by RFC
3292 2822.
3293
329456. Exim used to add From:, Date:, and Message-Id: header lines to any
3295 incoming messages that did not have them. Now it does so only if the
3296 message originates locally, that is, if there is no associated remote host
3297 address. When Resent- header lines are present, this applies to the Resent-
3298 lines rather than the non-Resent- lines.
3299
330057. Drop incoming SMTP connection after too many syntax or protocol errors. The
3301 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3302
330358. Messages for configuration errors now include the name of the main
3304 configuration file - useful now that there may be more than one file in a
3305 list (.included file names were always shown).
3306
330759. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3308 for those rare installations that do not start the daemon as root or run it
3309 setuid root. I've cut out the call to initgroups() if the daemon is not
3310 root at that time.
3311
331260. The Exim user and group can now be bound into the binary as text strings
3313 that are looked up at the start of Exim's processing.
3314
331561. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3316
331762. Added $mailstore_basename variable.
3318
331963. Installed patch to sieve.c from Michael Haardt.
3320
332164. When Exim failed to open the panic log after failing to open the main log,
3322 the original message it was trying to log was written to stderr and debug
3323 output, but if they were not available (the usual case in production), it
3324 was lost. Now it is written to syslog before the two lines that record the
3325 failures to open the logs.
3326
332765. Users' Exim filters run in subprocesses under the user's uid. It is
3328 possible for a "deliver" command or an alias in a "personal" command to
3329 provoke an address rewrite. If logging of address rewriting is configured,
3330 this fails because the process is not running as root or exim. There may be
3331 a better way of dealing with this, but for the moment (because 4.30 needs
3332 to be released), I have disabled address rewrite logging when running a
3333 filter in a non-root, non-exim process.
3334
3335
3336Exim version 4.24
3337-----------------
3338
3339 1. The buildconfig auxiliary program wasn't quoting the value set for
3340 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3341 not defined. This bug was masked in 4.22 by the effect that was fixed in
3342 change 4.23/1.
3343
3344 2. Some messages that were rejected after a message id was allocated were
3345 shown as "incomplete" by exigrep. It no longer does this for messages that
3346 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3347
3348 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3349 have allow_domain_literals set, the ID did not get logged in the <= line.
3350 Domain literals are now always recognized in Message-ID: header lines.
3351
3352 4. The first argument for a ${extract expansion item is the key name or field
3353 number. Leading and trailing spaces in this item were not being ignored,
3354 causing some misleading effects.
3355
3356 5. When deliver_drop_privilege was set, single queue runner processes started
3357 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3358 same command in the process it spins off) were not dropping privilege.
3359
3360 6. When the daemon running as "exim" started a queue runner, it always
3361 re-executed Exim in the spun-off process. This is a waste of effort when
3362 deliver_drop_privilege is set. The new process now just calls the
3363 queue-runner function directly.
3364
3365
3366Exim version 4.23
3367-----------------
3368
3369 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3370 HEADERS_CHARSET.
3371
3372 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3373 ignored. Though the use of -oP was forcing the writing of a pid file, it
3374 was always written to the default place.
3375
3376 3. If the message "no IP address found for host xxxx" is generated during
3377 incoming verification, it is now followed by identification of the incoming
3378 connection (so you can more easily find what provoked it).
3379
3380 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3381
3382 5. Added some features to "harden" Exim a bit more against certain attacks:
3383
3384 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3385 be put in Local/Makefile. This is like the never_users runtime option,
3386 but it cannot be overridden. The default setting is "root".
3387
3388 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3389 prefix string with which any file named in a -C command line option
3390 must start.
3391
3392 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3393 is retained for -C and -D only if the caller of Exim is root. Without
3394 it, the exim user may also use -C and -D and retain privilege.
3395
3396 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3397 command line option is disabled.
3398
3399 6. Macro names set by the -D option must start with an upper case letter, just
3400 like macro names defined in the configuration file.
3401
3402 7. Added "dereference=" facility to LDAP.
3403
3404 8. Two instances of the typo "uknown" in the source files are fixed.
3405
3406 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3407 the Configure-Makefile script screwed up while processing it.
3408
340910. Incorporated PCRE 4.4.
3410
341111. The SMTP synchronization check was not operating right at the start of an
3412 SMTP session. For example, it could not catch a HELO sent before the client
3413 waited for the greeting. There is now a check for outstanding input at the
3414 point when the greeting is written. Because of the duplex, asynchronous
3415 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3416 way, but not yet received, when the check is performed.
3417
341812. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3419 on TCP/IP sockets, because this apparently causes some broken clients to
3420 timeout.
3421
342213. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3423 unchanged) from the Cygwin maintainer.
3424
342514. The code for -bV that shows what is in the binary showed "mbx" when maildir
3426 was supported instead of testing for mbx. Effectively a typo.
3427
342815. The spa authenticator server code was not checking that the input it
3429 received was valid base64.
3430
343116. The debug output line for the "set" modifier in ACLs was not showing the
3432 name of the variable that was being set.
3433
343417. Code tidy: the variable type "vtype_string" was never used. Removed it.
3435
343618. Previously, a reference to $sender_host_name did not cause a DNS reverse
3437 lookup on its own. Something else was needed to trigger the lookup. For
3438 example, a match in host_lookup or the need for a host name in a host list.
3439 Now, if $sender_host_name is referenced and the host name has not yet been
3440 looked up, a lookup is performed. If the lookup fails, the variable remains
3441 empty, and $host_lookup_failed is set to "1".
3442
344319. Added "eqi" as a case-independent comparison operator.
3444
344520. The saslauthd authentication condition could segfault if neither service
3446 nor realm was specified.
3447
344821. If an overflowing value such as "2048M" was set for message_size_limit, the
3449 error message that was logged was misleading, and incoming SMTP
3450 connections were dropped. The message is now more accurate, and temporary
3451 errors are given to SMTP connections.
3452
345322. In some error situations (such as 21 above) Exim rejects all SMTP commands
3454 (except RSET) with a 421 error, until QUIT is received. However, it was
3455 failing to send a response to QUIT.
3456
345723. The HELO ACL was being run before the code for helo_try_verify_hosts,
3458 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3459 ACL is now run after the helo_try_verify_hosts code.
3460
346124. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3462 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3463 case-independent, so other case variants are also recognized). Apparently
3464 some systems use these upper case variants.
3465
346625. If more than two messages were waiting for the same host, and a transport
3467 filter was specified for the transport, Exim sent two messages over the
3468 same TCP/IP connection, and then failed with "socket operation on non-
3469 socket" when it tried to send the third.
3470
347126. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3472
347327. The extern definition of crypt16() in expand.c was not being excluded when
3474 the OS had its own crypt16() function.
3475
347628. Added bounce_return_body as a new option, and bounce_return_size_limit
3477 as a preferred synonym for return_size_limit, both as an option and as an
3478 expansion variable.
3479
348029. Added LIBS=-liconv to OS/Makefile-OSF1.
3481
348230. Changed the default configuration ACL to relax the local part checking rule
3483 for addresses that are not in any local domains. For these addresses,
3484 slashes and pipe symbols are allowed within local parts, but the sequence
3485 /../ is explicitly forbidden.
3486
348731. SPA server authentication was not clearing the challenge buffer before
3488 using it.
3489
349032. log_message in a "warn" ACL statement was writing to the reject log as
3491 well as to the main log, which contradicts the documentation and doesn't
3492 seem right (because no rejection is happening). So I have stopped it.
3493
349433. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3495 However, I am unable to do any testing of this.
3496
349734. Fixed an infelicity in the appendfile transport. When checking directories
3498 for a mailbox, to see if any needed to be created, it was accidentally
3499 using path names with one or more superfluous leading slashes; tracing
3500 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3501
350235. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3503 contents are added to the log line that is written for every discarded
3504 recipient. (Previously a log_message setting was ignored.)
3505
350636. The ${quote: operator now quotes the string if it is empty.
3507
350837. The install script runs exim in order to find its version number. If for
3509 some reason other than non-existence or emptiness, which it checks, it
3510 could not run './exim', it was installing it with an empty version number,
3511 i.e. as "exim-". This error state is now caught, and the installation is
3512 aborted.
3513
351438. An argument was missing from the function that creates an error message
3515 when Exim fails to connect to the socket for saslauthd authentication.
3516 This could cause Exim to crash, or give a corrupted message.
3517
351839. Added isip, isip4, and isip6 to ${if conditions.
3519
352040. The ACL variables $acl_xx are now saved with the message, and can be
3521 accessed later in routers, transports, and filters.
3522
352341. The new lookup type nwildlsearch is like wildlsearch, except that the key
3524 strings in the file are not string-expanded.
3525
352642. If a MAIL command specified a SIZE value that was too large to fit into an
3527 int variable, the check against message_size_limit failed. Such values are
3528 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3529 day this will have to be increased, but I don't think I want to be around
3530 when emails are that large.
3531
3532
3533
3534Exim version 4.22
3535-----------------
3536
3537 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3538 iconv() is not standard in FreeBSD.
3539
3540 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3541 IPv6 enabled. The observed symptom was a segmentation fault on return from
3542 the function os_common_find_running_interfaces() in src/os.c.
3543
3544 3. In the check_special_case() function in daemon.c I had used "errno" as an
3545 argument name, which causes warnings on some systems. This was basically a
3546 typo, since it was named "eno" in the comments!
3547
3548 4. The code that waits for the clock to tick (at a resolution of some fraction
3549 of a second) so as to ensure message-id uniqueness was always waiting for
3550 at least one whole tick, when it could have waited for less. [This is
3551 almost certainly not relevant at current processor speeds, where it is
3552 unlikely to ever wait at all. But we try to future-proof.]
3553
3554 5. The function that sleeps for a time interval that includes fractions of a
3555 second contained a race. It did not block SIGALRM between setting the
3556 timer, and suspending (a couple of lines later). If the interval was short
3557 and the sigsuspend() was delayed until after it had expired, the suspension
3558 never ended. On busy systems this could lead to processes getting stuck for
3559 ever.
3560
3561 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3562 process, before it forks any delivery processes. The open lookup caching
3563 mechanism meant that the open file or database connection was passed into
3564 the delivery process. The problem was that delivery processes always tidy
3565 up cached lookup data. This could cause a problem for the next delivery
3566 process started by the queue runner, because the external queue runner
3567 process does not know about the closure. So the next delivery process
3568 still has data in the lookup cache. In the case of a file lookup, there was
3569 no problem because closing a file descriptor in a subprocess doesn't affect
3570 the parent. However, if the lookup was caching a connection to a database,
3571 the connection was closed, and the second delivery process was likely to
3572 see errors such as "PGSQL: query failed: server closed the connection
3573 unexpectedly". The problem has been fixed by closing all cached lookups
3574 in a queue runner before running a delivery process.
3575
3576 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3577 seem to have the "const" qualifier which it has on other OS. I've
3578 parameterised it.
3579
3580 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3581 *of the same type* (client or server) with the same public name that an
3582 error should be diagnosed.
3583
3584 9. When Exim looked up a host name for an IP address, but failed to find the
3585 original IP address when looking up the host name (a safety check), it
3586 output the message "<ip address> does not match any IP for NULL", which was
3587 confusing, to say the least. The bug was that the host name should have
3588 appeared instead of "NULL".
3589
359010. Since release 3.03, if Exim is called by a uid other than root or the Exim
3591 user that is built into the binary, and the -C or -D options is used, root
3592 privilege is dropped before the configuration file is read. In addition,
3593 logging is switched to stderr instead of the normal log files. If the
3594 configuration then re-defines the Exim user, the unprivileged environment
3595 is probably not what is expected, so Exim logs a panic warning message (but
3596 proceeds).
3597
3598 However, if deliver_drop_privilege is set, the unprivileged state may well
3599 be exactly what is intended, so the warning has been cut out in that case,
3600 and Exim is allowed to try to write to its normal log files.
3601
3602
3603Exim version 4.21
3604-----------------
3605
3606 1. smtp_return_error_details was not giving details for temporary sender
3607 or receiver verification errors.
3608
3609 2. Diagnose a configuration error if two authenticators have the same public
3610 name.
3611
3612 3. Exim used not to create the message log file for a message until the first
3613 delivery attempt. This could be confusing when incoming messages were held
3614 for policy or load reasons. The message log file is now created at the time
3615 the message is received, and an initial "Received" line is written to it.
3616
3617 4. The automatically generated man page for command line options had a minor
3618 bug that caused no ill effects; however, a more serious problem was that
3619 the procedure for building the man page automatically didn't always
3620 operate. Consequently, release 4.20 contains an out-of-date version. This
3621 shouldn't happen again.
3622
3623 5. When building Exim with embedded Perl support, the script that builds the
3624 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3625 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3626
3627 6. The freeze_tell option was not being used for messages that were frozen on
3628 arrival, either by an ACL or by local_scan().
3629
3630 7. Added the smtp_incomplete_transaction log selector.
3631
3632 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3633 was accepting AUTH without a new EHLO.
3634
3635 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3636 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3637 RFC.
3638
363910. Logging of TCP/IP connections (when configured) now happens in the main
3640 daemon process instead of the child process, so that the TCP/IP connection
3641 count is more accurate (but it can never be perfect).
3642
364311. The use of "drop" in a nested ACL was not being handled correctly in the
3644 outer ACL. Now, if condition failure induced by the nested "drop" causes
3645 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3646 or "require"), the connection is dropped.
3647
364812. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3649 that yield "discard" can now be used with an "accept" or a "discard" verb,
3650 but an error is generated for any others (because I can't see a useful way
3651 to define what should happen).
3652
365313. When an ACL is read dynamically from a file (or anywhere else), the lines
3654 are now processed in the same way as lines in the Exim configuration file.
3655 In particular, continuation lines are supported.