Patch to use select() when poll() not available in spam.c.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
25257489 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.366 2006/07/03 15:19:44 ph10 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
45b91596
PH
23TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
24 with consistent privilege compared to when running as a daemon.
478be7b0 25
c59f5781
TF
26TF/03 Note in the spec that $authenticated_id is not set for local
27 submissions from trusted users.
28
90fc3069
TF
29TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
30 Thanks to Dean Brooks <dean@iglou.com> for the patch.
31
6083aca0
TF
32TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
33 by adding some example configuration directives to the default
34 configuration file. A little bit of work is required to uncomment the
35 directives and define how usernames and passwords are checked, but
36 there is now a framework to start from.
37
765b530f
PH
38PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
39 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
40 without this. I don't know how relevant this is to other LDAP libraries.
41
4e167a8c
PH
42PH/02 Add the verb name to the "unknown ACL verb" error.
43
4608d683
PH
44PH/03 Magnus Holmgren's patch for filter_prepend_home.
45
b8dc3e4a
PH
46PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
47
5418e93b
PH
48PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
49 directory not expanded when it should be if an expanded home directory
50 was set for the address (which is overridden by the transport).
51
b4a9bda2
PH
52PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
53 libradius.
54
45b91596
PH
55PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
56 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
57 because it is too late at that time, and has no effect.
58
5547e2c5
PH
59PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
60 security issue with \' (bugzilla #107). I could not use the
61 PQescapeStringConn() function, because it needs a PGconn value as one of
62 its arguments.
63
dbcef0ea
PH
64PH/08 When testing addresses using -bt, indicate those final addresses that
65 are duplicates that would not cause an additional delivery. At least one
66 person was confused, thinking that -bt output corresponded to deliveries.
67 (Suppressing duplicates isn't a good idea as you lose the information
68 about possibly different redirections that led to the duplicates.)
69
25257489
PH
70PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
71 systems where poll() doesn't work, in particular OS X.
72
c59f5781 73
c887c79e
TF
74Exim version 4.62
75-----------------
76
77TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
78 other effects) broke the use of negated acl sub-conditions.
79
1cce3af8
PH
80PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
81 patch).
82
afb3eaaf
PH
83PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
84 "Deny" causes Exim to reject the incoming connection with a 554 error.
85 Unfortunately, if there is a major crisis, such as a disk failure,
86 tcp-wrappers gives "deny", whereas what one would like would be some
87 kind of temporary error. A kludge has been added to help with this.
88 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
89 554 error is used if errno is still zero or contains ENOENT (which occurs
90 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
91 451 error is used.
92
e173618b
PH
93PH/03 Add -lutil to the default FreeBSD LIBS setting.
94
dd16e114
PH
95PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
96 errors. Otherwise a message that provokes a temporary error (when other
97 messages do not) can cause a whole host to time out.
98
f7fd3850
PH
99PH/05 Batch deliveries by appendfile and pipe transports did not work when the
100 addresses were routed directly to files or pipes from a redirect router.
101 File deliveries just didn't batch; pipe deliveries might have suffered
102 odd errors.
103
d87df92c
PH
104PH/06 A failure to get a lock for a hints database would erroneously always say
105 "Failed to get write lock", even when it was really a read lock.
106
7e9f683d
PH
107PH/07 The appendfile transport was creating MBX lock files with a fixed mode
108 of 0600. This has been changed to use the value of the lockfile_mode
109 option (which defaults to 0600).
110
bfad5236
PH
111PH/08 Applied small patch from the Sieve maintainer.
112
01c490df
PH
113PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
114 folder from quota calculations, a direct delivery into this folder messed
115 up the contents of the maildirsize file. This was because the regex was
116 used only to exclude .Trash (or whatever) when the size of the mailbox
117 was calculated. There was no check that a delivery was happening into an
118 excluded directory. This bug has been fixed by ignoring all quota
119 processing for deliveries into excluded directories.
120
d6629cdc
PH
121PH/10 Added the maildirfolder_create_regex option to appendfile.
122
1cce3af8 123
214e2000
PH
124Exim version 4.61
125-----------------
126
127PH/01 The code for finding all the local interface addresses on a FreeBSD
128 system running IPv6 was broken. This may well have applied to all BSD
129 systems, as well as to others that have similar system calls. The broken
130 code found IPv4 interfaces correctly, but gave incorrect values for the
131 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
132 that it would not match correctly against @[] and not recognize the IPv6
133 addresses as local.
134
f9daeae0
PH
135PH/02 The ipliteral router was not recognizing addresses of the form user@
136 [ipv6:....] because it didn't know about the "ipv6:" prefix.
137
7e66e54d
PH
138PH/03 Added disable_ipv6.
139
c8ea1597
PH
140PH/04 Changed $reply_address to use the raw form of the headers instead of the
141 decoded form, because it is most often used to construct To: headers
142 lines in autoreplies, and the decoded form may well be syntactically
143 invalid. However, $reply_address has leading white space removed, and all
144 newlines turned into spaces so that the autoreply transport does not
145 grumble.
146
911f6fde
PH
147PH/05 If group was specified without a user on a router, and no group or user
148 was specified on a transport, the group from the router was ignored.
149
47ca6d6c
PH
150PH/06 Increased the number of ACL variables to 20 of each type, and arranged
151 for visible compile-time settings that can be used to change these
152 numbers, for those that want even more. Backwards compatibility with old
153 spool files has been maintained. However, going back to a previous Exim
154 release will lost any variables that are in spool files.
155
ed0e9820
PH
156PH/07 Two small changes when running in the test harness: increase delay when
157 passing a TCP/IP connection to a new process, in case the original
158 process has to generate a bounce, and remove special handling of
159 127.0.0.2 (sic), which is no longer necessary.
160
eff37e47
PH
161PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
162 be the same on different OS.
163
1921d2ea
PH
164PH/09 Moved a debug statement in filter processing to avoid a race problem when
165 testing.
166
b3f69ca8
JJ
167JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
168 whether --show-vars was specified or not
169
170JJ/02 exipick: Added support for new ACL variable spool format introduced
171 in 4.61-PH/06
172
424a1c63
PH
173PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
174 syntactically invalid From: or Reply-to: line, and a filter used this to
175 generate an autoreply, and therefore failed to obtain an address for the
176 autoreply, Exim could try to deliver to a non-existent relative file
177 name, causing unrelated and misleading errors. What now happens is that
178 it logs this as a hard delivery error, but does not attempt to create a
179 bounce message.
180
7a100415
PH
181PH/11 The exinext utility has a -C option for testing purposes, but although
182 the given file was scanned by exinext itself; it wasn't being passed on
183 when Exim was called.
184
19b9dc85
PH
185PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
186 an end-of-file indication when reading a command response.
187
309bd837
PH
188PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
189 compiled. In many other places in Exim, IPv6 addresses are always
190 recognized, so I have changed this. It also means that IPv4 domain
191 literals of the form [IPV4:n.n.n.n] are now always recognized.
192
59e82a2a
PH
193PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
194 used if the router is not running as root, for example, when verifying at
195 ACL time, or when using -bh. The debugging output from this situation was
196 non-existent - all you got was a failure to exec. I have made two
197 changes:
198
199 (a) Failures to set uid/gid, the current directory, or a process leader
200 in a subprocess such as that created by queryprogram now generate
201 suitable debugging ouput when -d is set.
202
203 (b) The queryprogram router detects when it is not running as root,
204 outputs suitable debugging information if -d is set, and then runs
205 the subprocess without attempting to change uid/gid.
206
9edc04ce
PH
207PH/15 Minor change to Makefile for building test_host (undocumented testing
208 feature).
209
1349e1e5
PH
210PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
211 additional section of a DNS packet that returns MX or SRV records.
212 Instead, it always explicitly searches for A/AAAA records. This avoids
213 major problems that occur when a DNS server includes only records of one
214 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
215 fixed another bug: if SRV records were looked up and the corresponding
216 address records were *not* found in the additional section, the port
217 values from the SRV records were lost.
218
ea49d0e1
PH
219PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
220 using the correct key (the original address) when searching the retry
221 rules in order to find which one to use for generating the retry hint.
222
064a94c9
PH
223PH/18 If quota_warn_message contains a From: header, Exim now refrains from
224 adding the default one. Similarly, if it contains a Reply-To: header, the
225 errors_reply_to option, if set, is not used.
226
727071f8
PH
227PH/19 When calculating a retry time, Exim used to measure the "time since
228 failure" by looking at the "first failed" field in the retry record. Now
229 it does not use this if it is later than than the arrival time of the
230 message. Instead it uses the arrival time. This makes for better
231 behaviour in cases where some deliveries succeed, thus re-setting the
232 "first failed" field. An example is a quota failure for a huge message
233 when small messages continue to be delivered. Without this change, the
234 "time since failure" will always be short, possible causing more frequent
235 delivery attempts for the huge message than are intended.
dd16e114 236 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 237
f78eb7c6
PH
238PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
239 $1, $2, $3) because the numerical variables can be reset during some
240 expansion items (e.g. "match"), thereby losing the authentication data.
241
21c28500
PH
242PH/21 Make -bV show the size of off_t variables so that the test suite can
243 decide whether to run tests for quotas > 2G.
244
245PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
246 mailbox_size, and mailbox_filecount in the appendfile transport. If a
247 filecount value is greater than 2G or if a quota value is greater than 2G
248 on a system where the size of off_t is not greater than 4, a panic error
249 is given.
250
1688f43b
PH
251PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
252 never match. The debug and -bh output now contains an explicit error
253 message indicating a malformed IPv4 address or mask.
254
255PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
256 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
257 PH/23 above applies.
258
9675b384
PH
259PH/25 Do not write to syslog when running in the test harness. The only
260 occasion when this arises is a failure to open the main or panic logs
261 (for which there is an explicit test).
262
6a3f1455
PH
263PH/26 Added the /no_tell option to "control=freeze".
264
dac79d3e
PH
265PH/27 If a host name lookup failed very early in a connection, for example, if
266 the IP address matched host_lookup and the reverse lookup yielded a name
267 that did not have a forward lookup, an error message of the form "no IP
268 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
269 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 270
5977a0b3
PH
271PH/28 An enabling patch from MH: add new function child_open_exim2() which
272 allows the sender and the authenticated sender to be set when
273 submitting a message from within Exim. Since child_open_exim() is
274 documented for local_scan(), the new function should be too.
275
c91535f3
PH
276PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
277 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
278 results in an empty string is now treated as unset.
279
0d46a8c8
PH
280PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
281
278c6e6c
PH
282PH/31 Added sender_verify_fail logging option.
283
2cbb4081
PH
284PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
285 needed by RFC 822 but not by RFC 2822 was commented out. I have now
286 tidied the source and removed it altogether.
287
3eef829e
PH
288PH/33 When a queue run was abandoned because the load average was too high, a
289 log line was always written; now it is written only if the queue_run log
290 selector is set. In addition, the log line for abandonment now contains
291 information about the queue run such as the pid. This is always present
292 in "start" and "stop" lines but was omitted from the "abandon" line.
293
1ab95fa6
PH
294PH/34 Omit spaces between a header name and the colon in the error message that
295 is given when verify = headers_syntax fails (if there are lots of them,
296 the message gets confusing).
297
230205fc
PH
298PH/35 Change the default for dns_check_names_pattern to allow slashes within
299 names, as there are now some PTR records that contain slashes. This check
300 is only to protect against broken name servers that fall over on strange
301 characters, so the fact that it applies to all lookups doesn't matter.
302
75e0e026
PH
303PH/36 Now that the new test suite is complete, we can remove some of the
304 special code in Exim that was needed for the old test suite. For example,
305 sorting DNS records because real resolvers return them in an arbitrary
306 order. The new test suite's fake resolver always returns records in the
307 same order.
308
309PH/37 When running in the test harness, use -odi for submitted messages (e.g.
310 bounces) except when queue_only is set, to avoid logging races between
311 the different processes.
312
145396a6
PH
313PH/38 Panic-die if .include specifies a non-absolute path.
314
3cd34f13
PH
315PH/39 A tweak to the "H" retry rule from its user.
316
11121d3d
JJ
317JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
318 a label. They prevented compilation on older perls.
319
320JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
321 a warning to be raised on newish perls.
322
323JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
324 on queue. Changes to match documented behaviour of showing count of
325 messages matching specified criteria.
326
8def5aaf
PH
327PH/40 Changed the default ident timeout from 30s to 5s.
328
929ba01c
PH
329PH/41 Added support for the use of login_cap features, on those BSD systems
330 that have them, for controlling the resources used by pipe deliveries.
331
2632889e
PH
332PH/42 The content-scanning code uses fopen() to create files in which to put
333 message data. Previously it was not paying any attention to the mode of
334 the files. Exim runs with umask(0) because the rest of the code creates
335 files with open(), and sets the required mode explicitly. Thus, these
336 files were ending up world-writeable. This was not a big issue, because,
337 being within the spool directory, they were not world-accessible. I have
338 created a function called modefopen, which takes an additional mode
339 argument. It sets umask(777), creates the file, chmods it to the required
340 mode, then resets the umask. All the relevant calls to fopen() in the
341 content scanning code have been changed to use this function.
342
944a9c55
PH
343PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
344 to 24 hours. This avoids potential overflow problems when processing G
345 and H retry rules. I suspect nobody ever tinkers with this value.
346
4a23603b
PH
347PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
348
4730f942
PH
349PH/45 When the plaintext authenticator is running as a client, the server's
350 challenges are checked to ensure they are valid base64 strings. By
351 default, the authentication attempt is cancelled if an invalid string is
352 received. Setting client_ignore_invalid_base64 true ignores these errors.
353 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
354 they are received. Thus, the responses can be made to depend on the
355 challenges. If an invalid string is ignored, an empty string is placed in
356 the variable.
357
30dba1e6
PH
358PH/46 Messages that are created by the autoreply transport now contains a
359 References: header, in accordance with RFCs 2822 and 3834.
360
382afc6b
PH
361PH/47 Added authenticated_sender_force to the smtp transport.
362
a86229cf
PH
363PH/48 The ${prvs expansion was broken on systems where time_t was long long.
364
50c99ba6
PH
365PH/49 Installed latest patch from the Sieve maintainer.
366
d35e429d
PH
367PH/50 When an Exim quota was set without a file count quota, and mailbox_size
368 was also set, the appendfile transport was unnecessarily scanning a
369 directory of message files (e.g. for maildir delivery) to find the count
370 of files (along with the size), even though it did not need this
371 information. It now does the scan only if it needs to find either the
372 size of the count of files.
373
f90d018c
PH
374PH/51 Added ${time_eval: to convert Exim time strings into seconds.
375
75def545
PH
376PH/52 Two bugs concerned with error handling when the smtp transport is
377 used in LMTP mode:
378
379 (i) Exim was not creating retry information for temporary errors given
380 for individual recipients after the DATA command when the smtp transport
381 was used in LMTP mode. This meant that they could be retried too
382 frequently, and not timed out correctly.
383
384 (ii) Exim was setting the flag that allows error details to be returned
385 for LMTP errors on RCPT commands, but not for LMTP errors for individual
386 recipients that were returned after the DATA command.
387
388PH/53 This is related to PH/52, but is more general: for any failing address,
389 when detailed error information was permitted to be returned to the
390 sender, but the error was temporary, then after the final timeout, only
391 "retry timeout exceeded" was returned. Now it returns the full error as
392 well as "retry timeout exceeded".
393
c46782ef
PH
394PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
395 do this, and (what is worse) MTAs that accept it.
396
71fafd95
PH
397PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
398 will now be deprecated.
399
2c5db4fd
PH
400PH/56 New os.c-cygwin from the Cygwin maintainer.
401
9cf6b11a
JJ
402JJ/06 exipick: added --unsorted option to allow unsorted output in all output
403 formats (previously only available in exim formats via -bpr, -bpru,
404 and -bpra. Now also available in native and exiqgrep formats)
405
406JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
407 with very large, slow to parse queues
408
409JJ/08 exipick: added ! as generic prefix to negate any criteria format
410
411JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
412
898d150f
PH
413PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
414 responses to authentication challenges, though it was showing the
415 challenges; (ii) I've removed the CR characters from the debug output for
416 SMTP output lines.
417
46218253
PH
418PH/58 Allow for the insertion of a newline as well as a space when a string
419 is turned into more than one encoded-word during RFC 2047 encoding. The
420 Sieve code now uses this.
421
e97957bc
PH
422PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
423 data_4xx, lost_connection, tls_required.
424
81e509d7
PH
425PH/60 When a VRFY deferred or FAILED, the log message rather than the user
426 message was being sent as an SMTP response.
427
3d240ff7
PH
428PH/61 Add -l and -k options to exicyclog.
429
b37c4101
PH
430PH/62 When verifying, if an address was redirected to one new address, so that
431 verification continued, and the new address failed or deferred after
432 having set something in $address_data, the value of $address_data was not
433 passed back to the ACL. This was different to the case when no
434 redirection occurred. The value is now passed back in both cases.
435
79378e0f
PH
436PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
437 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
438 use login_cap.h, so on its own it isn't the distinguishing feature. The
439 new name refers directly to the setclassresources() function.
440
e49c7bb4
PH
441PH/65 Added configuration files for NetBSD3.
442
d114ec46
PH
443PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
444
f3d7df6c
PH
445PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
446 is preferred over IPv4.
447
715ab376
PH
448PH/68 The bounce_return_message and bounce_return_body options were not being
449 honoured for bounces generated during the reception of non-SMTP messages.
450 In particular, this applied to messages rejected by the ACL. This bug has
451 been fixed. However, if bounce_return_message is true and bounce_return_
452 body is false, the headers that are returned for a non-SMTP message
453 include only those that have been read before the error was detected.
454 (In the case of an ACL rejection, they have all been read.)
455
6b31b150
PH
456PH/69 The HTML version of the specification is now built in a directory called
457 spec_html instead of spec.html, because the latter looks like a path with
458 a MIME-type, and this confuses some software.
459
460PH/70 Catch two compiler warnings in sieve.c.
461
d515a917
PH
462PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
463 function verify_get_ident() calls ip_connect() to connect a socket, but
464 if the "connect()" function timed out, ip_connect() used to close the
465 socket. However, verify_get_ident() also closes the socket later, and in
466 between Exim writes to the log, which may get opened at this point. When
467 the socket was closed in ip_connect(), the log could get the same file
468 descriptor number as the socket. This naturally causes chaos. The fix is
469 not to close the socket in ip_connect(); the socket should be closed by
470 the function that creates it. There was only one place in the code where
471 this was missing, in the iplookup router, which I don't think anybody now
472 uses, but I've fixed it anyway.
473
9b8fadde
PH
474PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
475 well as to direct DNS lookups. Otherwise the handling of names in host
476 lists is inconsistent and therefore confusing.
477
214e2000 478
5de37277
PH
479Exim version 4.60
480-----------------
481
cc38ddbf
PH
482PH/01 Two changes to the default runtime configuration:
483
484 (1) Move the checks for relay_from_hosts and authenticated clients from
485 after to before the (commented out) DNS black list checks.
486
487 (2) Add control=submission to the relay_from_hosts and authenticated
488 clients checks, on the grounds that messages accepted by these
489 statements are most likely to be submissions.
5de37277 490
72fdd6ae
PH
491PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
492
493 (1) Generate an error if the third argument for the ${prvs expansion is
494 not a single digit.
495
496 (2) Treat a missing third argument of ${prvscheck as if it were an empty
497 string.
498
499 (3) Reset the variables that are obtained from the first argument of
500 ${prvscheck and used in the second argument before leaving the code,
501 because their memory is reclaimed, so using them afterwards may do
502 silly things.
503
504 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
505 one (it's much easier than Tom thought :-).
506
507 (5) Because of (4), we can now allow for the use of $prvscheck_result
508 inside the third argument.
cb9328de 509
cb741023
PH
510PH/03 For some reason, the default setting of PATH when running a command from
511 a pipe transport was just "/usr/bin". I have changed it to
512 "/bin:/usr/bin".
513
f174f16e
PH
514PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
515 anything to be listed in the output from -bV.
b2f5a032 516
c25242d7
PH
517PH/05 When a filter generated an autoreply, the entire To: header line was
518 quoted in the delivery log line, like this:
519
520 => >A.N.Other <ano@some.domain> <original@ddress> ...
521
522 This has been changed so that it extracts the operative address. There
523 may be more than one such address. If so, they are comma-separated, like
524 this:
525
526 => >ano@some.domain,ona@other.domain <original@ddress> ...
527
82c19f95
PH
528PH/06 When a client host used a correct literal IP address in a HELO or EHLO
529 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
530 not being looked up in the rDNS to get a host name, Exim was showing the
531 IP address twice in Received: lines, even though the IP addresses were
532 identical. For example:
533
534 Received: from [1.2.3.4] (helo=[1.2.3.4])
535
536 However, if the real host name was known, it was omitting the HELO data
537 if it matched the actual IP address. This has been tidied up so that it
538 doesn't show the same IP address twice.
539
d7ffbc12
PH
540PH/07 When both +timestamp and +memory debugging was on, the value given by
541 $tod_xxx expansions could be wrong, because the tod_stamp() function was
542 called by the debug printing, thereby overwriting the timestamp buffer.
543 Debugging no longer uses the tod_stamp() function when +timestamp is set.
544
9f526266
PH
545PH/08 When the original message was included in an autoreply transport, it
546 always said "this is a copy of the message, including all the headers",
547 even if body_only or headers_only was set. It now gives an appropriate
548 message.
549
87fcc8b9
PH
550PH/09 Applied a patch from the Sieve maintainer which:
551
552 o fixes some comments
553 o adds the (disabled) notify extension core
554 o adds some debug output for the result of if/elsif tests
555 o points to the current vacation draft in the documentation
556 and documents the missing references header update
557
558 and most important:
559
560 o fixes a bug in processing the envelope test (when testing
561 multiple envelope elements, the last element determinted the
562 result)
563
456682f5
PH
564PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
565 Electronic Mail") by including:
566
567 Auto-submitted: auto-generated
568
569 in the messages that it generates (bounce messages and others, such as
570 warnings). In the case of bounce messages for non-SMTP mesages, there was
571 also a typo: it was using "Auto_submitted" (underscore instead of
572 hyphen). Since every message generated by Exim is necessarily in response
573 to another message, thes have all been changed to:
574
575 Auto-Submitted: auto-replied
576
577 in accordance with these statements in the RFC:
578
579 The auto-replied keyword:
580
581 - SHOULD be used on messages sent in direct response to another
582 message by an automatic process,
583
584 - MUST NOT be used on manually-generated messages,
585
586 - MAY be used on Delivery Status Notifications (DSNs) and Message
587 Disposition Notifications (MDNs),
588
589 - MUST NOT be used on messages generated by automatic or periodic
590 processes, except for messages which are automatic responses to
591 other messages.
592
3e46c1aa
PH
593PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
594 to the default Received: header definition.
456682f5 595
49826d12
PH
596PH/12 Added log selector acl_warn_skipped (default on).
597
eba0c039
PH
598PH/13 After a successful wildlsearch lookup, discard the values of numeric
599 variables because (a) they are in the wrong storage pool and (b) even if
600 they were copied, it wouldn't work properly because of the caching.
601
a0d6ba8a
PH
602PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
603 checking when decoding. Apparently there are clients that generate
604 overlong encoded strings. Why am I not surprised?
605
f0917727
PH
606PH/15 If the first argument of "${if match_address" was not empty, but did not
607 contain an "@" character, Exim crashed. Now it writes a panic log message
608 and treats the condition as false.
609
096fee00
PH
610PH/16 In autoreply, treat an empty string for "once" the same as unset.
611
024bd3c2
PH
612PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
613 extension "envelope-auth". The code is finished and in agreement with
614 other implementations, but there is no documentation so far and in fact,
615 nobody wrote the draft yet. This extension is currently #undef'ed, thus
616 not changing the active code.
617
618 Print executed "if" and "elsif" statements when debugging is used. This
619 helps a great deal to understand what a filter does.
620
621 Document more things not specified clearly in RFC3028. I had all this
622 sorted out, when out of a sudden new issues came to my mind. Oops."
623
df199fec
PH
624PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
625 (Bugzilla #53).
626
d27f1df3
PH
627PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
628 canonical form (as documented). However, after a host name lookup from
629 the IP address, check_host() was doing a simple string comparison with
630 addresses acquired from the DNS when checking that the found name did
631 have the original IP as one of its addresses. Since any found IPv6
632 addresses are likely to be in abbreviated form, the comparison could
633 fail. Luckily, there already exists a function for doing the comparison
634 by converting both addresses to binary, so now that is used instead of
635 the text comparison.
636
96776534
PH
637PH/20 There was another similar case to PH/19, when a complete host name was
638 given in a host list; looking up its IP address could give an abbreviated
639 form, whereas the current host's name might or might not be abbreviated.
640 The same fix has been applied.
641
5de37277 642
9a799bc0
PH
643Exim version 4.54
644-----------------
645
646PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
647 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
648 It now does.
649
99a4b039
PH
650PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
651 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
652
653PH/03 Typo: missing ".o" in src/pcre/Makefile.
654
4b233853
PH
655PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
656 header line, restrict the check to what is listed in RFCs 2369 and 2929.
657 Also, for "Auto-Submitted", treat anything other than "no" as
658 non-personal, in accordance with RFC 3834. (Previously it treated
659 anything starting "auto-" as non-personal.)
660
8857ccfd
PH
661TF/01 The control=submission/name=... option had a problem with syntax
662 errors if the name included a slash character. The /name= option
663 now slurps the rest of the string, so it can include any characters
664 but it must come last in the list of options (after /sender_retain
665 or /domain=).
666
433a2980
PH
667PH/05 Some modifications to the interface to the fake nameserver for the new
668 testing suite.
669
3e46c1aa 670
9a799bc0 671
e3a311ba
TK
672Exim version 4.53
673-----------------
674
675TK/01 Added the "success_on_redirect" address verification option. See
676 NewStuff for rationale and an example.
677
13b685f9
PH
678PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
679
395ff96d
PH
680PH/02 Patch to exigrep to allow it to work on syslog lines.
681
5b68f6e4
PH
682PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
683 fread() to skip over the body file's header line, because in Cygwin the
684 header line is locked and is inaccessible.
685
1ab52c69
PH
686PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
687 co-exist for some time) to make it clear that it is the Exim ID that is
688 referenced, not the Message-ID: header line.
689
b07e6aa3
PH
690PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
691 string_format() function, because snprintf() does not exist on all
692 operating systems.
693
254e032f
PH
694PH/06 The use of forbid_filter_existstest now also locks out the use of the
695 ${stat: expansion item.
696
3af76a81
PH
697PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
698 protocol synchronization error", to keep the pedants happy.
699
2548ba04
PH
700PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
701 well as for IRIX systems, when gcc is being used. See the host.c source
702 file for comments.
703
b6c6011d
PH
704PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
705
cf39cf57
PH
706PH/10 Named domain lists were not working if used in a queue_smtp_domains
707 setting.
708
f1513293
PH
709PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
710 transport and to the smtp transport in LMTP mode.
711
727549a4
PH
712TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
713
af46795e
PH
714PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
715 run a filter in a subprocess. This could lead to confusion in subsequent
716 lookups in the parent process. There should also be a search_tidyup() at
717 the end of the subprocess.
718
d7b47fd0
PH
719PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
720 only if the host matched helo_try_verify_hosts, which caused the
721 verification to occur when the EHLO/HELO command was issued. The ACL just
722 tested the remembered result. Now, if a previous verification attempt has
723 not happened, "verify = helo" does it there and then.
724
ee744174
JJ
725JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
726
b582ab87
PH
727TK/03 Fix log output including CR from clamd.
728
41a13e0a
PH
729PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
730 exist provoked a memory error which could cause a segfault.
731
f625cc5a
PH
732PH/15 Installed PCRE 6.2
733
734PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
735
21f7af35
PH
736PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
737 of the problem. Specifically, suggested +O2 rather than +O1 for the
738 HP-UX compiler.
739
31480e42
PH
740PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
741
2d280592
PH
742PH/20 If a delivery was routed to a non-standard port by means of an SRV
743 record, the port was not correctly logged when the outgoing_port log
744 selector was set (it logged the transort's default port).
745
7cd1141b
PH
746PH/21 Added support for host-specific ports to manualroute, queryprogram,
747 fallback_hosts, and "hosts" in the smtp transport.
748
749PH/22 If the log selector "outgoing_port" is set, the port is now also given on
750 host errors such as "Connection refused".
751
750af86e
PH
752PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
753 authentication with radiusclient 0.4.9:
754
755 - Error returned from rc_read_config was caught wrongly
756 - Username/password not passed on to radius server due to wrong length.
757
758 The presumption is that some radiusclient API changes for 4.51/PH/17
759 were not taken care of correctly. The code is still untested by me (my
760 Linux distribution still has 0.3.2 of radiusclient), but it was
761 contributed by a Radius user.
762
763PH/24 When doing a callout, the value of $domain wasn't set correctly when
764 expanding the "port" option of the smtp transport.
765
4304270b
TK
766TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
767 while reading a MIME header. Thanks to Tom Hughes for a patch.
768
750af86e
PH
769PH/24 Include config.h inside local_scan.h so that configuration settings are
770 available.
771
64ffc24f
PH
772PH/25 Make $smtp_command_argument available after all SMTP commands. This means
773 that in an ACL for RCPT (for example), you can examine exactly what was
774 received.
775
5dd9625b
PH
776PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
777 commands, but it was not correctly comparing the address with the actual
778 client host address. Thus, it would show the EHLO address in Received:
779 header lines when this was not necessary.
780
5591031b
PH
781PH/27 Added the % operator to ${eval:}.
782
ba18e66a
PH
783PH/28 Exim tries to create and chdir to its spool directory when it starts;
784 it should be ignoring failures (because with -C, for example, it has lost
785 privilege). It wasn't ignoring creation failures other than "already
786 exists".
787
9cec981f
PH
788PH/29 Added "crypteq" to the list of supported features that Exim outputs when
789 -bV or -d is used.
790
aa2b5c79
PH
791PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
792 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
793 too many continuations, the temporary file was not being removed, and the
794 return code was incorrect.
aa2b5c79 795
48a53b7f
PH
796PH/31 Missing "BOOL" in function definition in filtertest.c.
797
1c59d63b
PH
798PH/32 Applied Sieve patches from the maintainer.
799
671012da
TK
800TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
801
1509d3a8
PH
802PH/33 Added "verify = not_blind".
803
804PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
805 Local/Makefile (with some defaults set). These are used in built scripts
806 such as exicyclog, but they have never been used in the exim_install
807 script (though there are many overriding facilities there). I have
808 arranged that the exim_install script now takes note of these two
809 settings.
810
811PH/35 Installed configuration files for Dragonfly.
812
2fe1a124
PH
813PH/36 When a locally submitted message by a trusted user did not contain a
814 From: header, and the sender address was obtained from -f or from an SMTP
815 MAIL command, and the trusted user did not use -F to supply a sender
816 name, $originator_name was incorrectly used when constructing a From:
817 header. Furthermore, $originator_name was used for submission mode
818 messages from external hosts without From: headers in a similar way,
819 which is clearly wrong.
820
8800895a
PH
821PH/37 Added control=suppress_local_fixups.
822
ccfdb010
PH
823PH/38 When log_selector = +received_sender was set, and the addition of the
824 sender made the log line's construction buffer exactly full, or one byte
825 less than full, an overflow happened when the terminating "\n" was
826 subsequently added.
827
1130bfb0
PH
828PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
829 when the result of a list match is failure because a DNS lookup failed.
830
ebcb507f
PH
831PH/40 RM_COMMAND is now used in the building process.
832
c35e155c
PH
833PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
834 the "build-* directories that it finds.
835
95d1f782
PH
836PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
837 address in a domain literal was a prefix of an interface address.
838
fd6de02e
PH
839PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
840 when verifying a sender address, unless rewrite_headers is false.
841
58de37c5
PH
842PH/44 Wrote a long comment about why errors_to addresses are verified as
843 recipients, not senders.
844
261cf466
TF
845TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
846 the ratelimit ACL was added.
847
3ee512ff
PH
848PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
849
e08c430f
PH
850PH/46 Added extra information about PostgreSQL errors to the error string.
851
bef5a11f
PH
852PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
853 avoiding the need to install special zones in a real server. This is
854 backwards compatible; if it can't find the fake resolver, it drops back.
855 Thus, both old and new test suites can be run.
856
7546de58
TF
857TF/02 Added util/ratelimit.pl
858
e5d5a95f
TF
859TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
860 clock is set back in time.
861
2e88a017
TF
862TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
863 Candler <B.Candler@pobox.com>.
864
a5f65aa4
TF
865TF/05 The fix for PH/43 was not completely correct; widen_domains is always
866 OK for addresses that are the result of redirections.
867
e7726cbf
PH
868PH/48 A number of further additions for the benefit of the new test suite,
869 including a fake gethostbyname() that interfaces to the fake DNS resolver
870 (see PH/47 above).
871
a7fdad5b
TF
872TF/06 The fix for widen_domains has also been applied to qualify_single and
873 search_parents which are the other dnslookup options that can cause
874 header rewrites.
875
6af56900
PH
876PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
877 type ("H").
878
0925ede6
PH
879PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
880
66afa403
TF
881TF/07 Exim produced the error message "an SRV record indicated no SMTP
882 service" if it encountered an MX record with an empty target hostname.
883 The message is now "an MX or SRV record indicated no SMTP service".
884
0154e85a
TF
885TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
886 if the DNS of the sending site is misconfigured. This is quite a
887 common situation. This change restores the behaviour of treating a
888 helo verification defer as a failure.
889
16f12c76
PH
890PH/51 If self=fail was set on a router, the bounce message did not include the
891 actual error message.
892
bbe902f0 893
e5a9dba6
PH
894Exim version 4.52
895-----------------
896
897TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
898
22c3b60b
PH
899PH/01 When a transport filter timed out in a pipe delivery, and the pipe
900 command itself ended in error, the underlying message about the transport
901 filter timeout was being overwritten with the pipe command error. Now the
902 underlying error message should be appended to the second error message.
903
06a9b4b5
PH
904TK/01 Fix poll() being unavailable on Mac OSX 10.2.
905
c1ac6996
PH
906PH/02 Reduce the amount of output that "make" produces by default. Full output
907 can still be requested.
908
9c7a242c
PH
909PH/03 The warning log line about a condition test deferring for a "warn" verb
910 was being output only once per connection, rather than after each
911 occurrence (because it was using the same function as for successful
912 "warn" verbs). This seems wrong, so I have changed it.
913
87ba3f5f
PH
914TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
915 it should not have, which might have caused a crash in the right
916 circumstances, but probably never did.
917
918PH/04 Installed a modified version of Tony Finch's patch to make submission
919 mode fix the return path as well as the Sender: header line, and to
920 add a /name= option so that you can make the user's friendly name appear
921 in the header line.
922
29aba418
TF
923TF/03 Added the control = fakedefer ACL modifier.
924
fe0dab11
TF
925TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
926 Mark Lowes for thorough testing.
870f6ba8 927
11d337a4
TK
928TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
929
930TK/03 Merged latest SRS patch from Miles Wilton.
931
415c8f3b
PH
932PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
933 with the definition in sysexits.h (which is #included earlier).
934 Fortunately, Exim does not actually use EX_OK. The code used to try to
935 preserve the sysexits.h value, by assumimg that macro definitions were
936 scanned for macro replacements. I have been disabused of this notion,
937 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 938
958541e9
PH
939PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
940 in the smtp transport. When a block could not be written in a single
941 write() function, the timeout was being re-applied to each part-write.
942 This seems wrong - if the receiver was accepting one byte at a time it
943 would take for ever. The timeout is now adjusted when this happens. It
944 doesn't have to be particularly precise.
945
c206415f
TK
946TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
947 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
948
2a4be8f9
PH
949PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
950 without a domain if the check to <postmaster@domain> fails.
951
1cba11c5
SC
952SC/01 Eximstats: added -xls and the ability to specify output files
953 (patch written by Frank Heydlauf).
954
955SC/02 Eximstats: use FileHandles for outputing results.
956
957SC/03 Eximstats: allow any combination of xls, txt, and html output.
958
959SC/04 Eximstats: fixed display of large numbers with -nvr option
960
961SC/05 Eximstats: fixed merging of reports with empty tables.
962
963SC/06 Eximstats: added the -include_original_destination flag
964
965SC/07 Eximstats: removed tabs and trailing whitespace.
966
1005d00e
TK
967TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
968
969TK/06 MBOX spool code: Add real "From " MBOX separator line
970 so the .eml file is really in mbox format (even though
971 most programs do not really care). Patch from Alex Miller.
972
973TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
974 The latter is generated from $received_to and is only set if the
975 message has one envelope recipient. SA can use these headers,
976 obviously out-of-the-box. Patch from Alex Miller.
977
9b4768fa
PH
978PH/08 The ${def test on a variable was returning false if the variable's
979 value was "0", contrary to what the specification has always said!
980 The result should be true unless the variable is empty.
981
982PH/09 The syntax error of a character other than { following "${if
983 def:variable_name" (after optional whitespace) was not being diagnosed.
984 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
985 accidental colon was present, for example, could give incorrect results.
986
0d7eb84a
PH
987PH/10 Tidied the code in a number of places where the st_size field of a stat()
988 result is used (not including appendfile, where other changes are about
989 to be made).
990
991PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
992 This involved changing a lot of size variables from int to off_t. It
993 should work with maildirs and everything.
994
40727bee
TK
995TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
996 spamd dying while we are connected to it.
997
554d2369
TF
998TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
999 <jgh@wizmail.org>
1000
1f922db1
PH
1001PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1002 function for BDB 4.3.
1003
ef213c3b
PH
1004PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1005
8ac170f3
PH
1006PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1007 the sources for PCRE have been re-arranged and more files are now
1008 involved.
1009
b1c749bb
PH
1010PH/15 The code I had for printing potentially long long variables in PH/11
1011 above was not the best (it lost precision). The length of off_t variables
1012 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
1013 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1014 to be "long long int" or "long int". This is needed for the internal
1015 formatting function string_vformat().
b1c749bb 1016
4aac9b49
PH
1017PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1018 the configuration file to be ":syslog", then the script "guesses" where
1019 the logs files are, rather than using the compiled in default. In our
1020 case the guess is not the same as the compiled default, so the script
1021 suddenly stopped working when I started to use syslog. The patch checks
1022 to see if log_file_path is "". If so, it attempts to read it from exim
1023 with no configuration file to get the compiled in version, before it
1024 falls back to the previous guessing code."
1025
294520c8
TK
1026TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1027 implementing BATV in an Exim configuration. See NewStuff for the gory
1028 details.
1029
5bd022fe
PH
1030PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1031 Makefile that are specific to HP-UX.
1032
90e9ce59
PH
1033PH/18 If the "use_postmaster" option was set for a recipient callout together
1034 with the "random" option, the postmaster address was used as the MAIL
1035 FROM address for the random test, but not for the subsequent recipient
1036 test. It is now used for both.
1037
5ea81592
PH
1038PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1039 patch removes a few documentation additions to RFC 3028, because the
1040 latest draft now contains them. It adds the new en;ascii-case comparator
1041 and a new error check for 8bit text in MIME parts. Comparator and
1042 require names are now matched exactly. I enabled the subaddress
1043 extension, but it is not well tested yet (read: it works for me)."
1044
c6c2dc1d
PH
1045PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1046 rework some of the code of TK/09 above to avoid the hardwired use of
1047 "%lld" and "long long". Replaced the call to snprintf() with a call to
1048 string_vformat().
1049
fffffe4c
PH
1050PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1051 records point to non-existent hosts", "retry timeout exceeded", and
1052 "retry time not reached for any host after a long failure period".
ca02eafb 1053
9a26b6b2
PH
1054PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1055 experimental DomainKeys support:
1056
1057 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1058 (2) On an error such as an illegally used "control", the wrong name for
1059 the control was given.
1060
1061 These problems did NOT occur unless DomainKeys support was compiled.
1062
4aee0225
PH
1063PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1064
32d668a5
PH
1065PH/24 Added ${if match_ip condition.
1066
8187c3f3
PH
1067PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1068 databases so that it will be absolutely obvious if a crash occurs in the
1069 DB library. This is a regular occurrence (often caused by mis-matched
1070 db.h files).
1071
ff790e47 1072PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1073 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1074 picked up on a user's system that detects such things. There doesn't seem
1075 to be a gcc warning option for this - only an attribute that has to be
1076 put on the function's prototype. It seems that in Fedora Core 4 they have
1077 set this on a number of new functions. No doubt there will be more in due
1078 course.
ff790e47 1079
5417f6d1
PH
1080PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1081 specify a transport. However, if an address that was verified by such a
1082 router was the subject of a callout, Exim crashed because it tried to
1083 read the rcpt_include_affixes from the non-existent transport. Now it
1084 just assumes that the setting of that option is false. This bug was
1085 introduced by 4.51/PH/31.
1086
59cf8544
PH
1087PH/28 Changed -d+all to exclude +memory, because that information is very
1088 rarely of interest, but it makes the output a lot bigger. People tend to
1089 do -d+all out of habit.
1090
e7ad8a65
PH
1091PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1092 code in os-type was giving problems when libc.so lives in lib64, like on
1093 x86_64 Fedora Core.
1094
ade42478
PH
1095PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1096 aren't the modern standard, and it seems that some systems' include files
1097 don't always have them. Exim was already checking for some of the newer
1098 ones like T_AAAA, and defining it itself. I've added checks for all the
1099 record types that Exim uses.
1100
182ad5cf
PH
1101PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1102 not automatically generating a new one, as it is supposed to. This
1103 prevented TLS from working. If the file did exist, but contained invalid
1104 data, a new version was generated, as expected. It was only the case of a
1105 non-existent file that was broken.
1106
b0d9fc80
TK
1107TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1108 with a change in libdomainkeys > 0.64.
1109
1110TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1111 from DNS. If the selector record carries the flag, it now has
1112 precedence over the domain-wide flag.
1113
1114TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1115
47c7a64a
PH
1116PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1117 the use of a port name that isn't defined in /etc/services) occurred, the
1118 message was deferred as in a normal delivery, and thus remained on the
1119 spool, instead of being failed because of the mua_wrapper setting. This
1120 is now fixed, and I tidied up some of the mua_wrapper messages at the
1121 same time.
1122
a388bce4
SC
1123SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1124 the messages in a hash of arrays rather than using individual hashes.
1125 This is a bit cleaner and results in dramatic memory savings, albeit
1126 at a slight CPU cost.
1127
1128SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1129 as requested by Marc Sherman.
1130
1131SC/10 Eximstats: added histograms for user specified patterns as requested
1132 by Marc Sherman.
1133
0793e4ed
SC
1134SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1135
c58b88df
PH
1136PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1137 fopen() in the content-scanning modules that did not already have it.
1138
e7ad8a65 1139
7982096b
PH
1140Exim version 4.51
1141-----------------
1142
1a46a8c5
PH
1143TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1144 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1145
2f079f46 1146TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1147
1148TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1149
1150PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1151 to test Sieve filters that use "vacation".
1152
1153PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1154 that changes the way the GnuTLS parameters are stored in the cache file.
1155 The new format can be generated externally. For backward compatibility,
1156 if the data in the cache doesn't make sense, Exim assumes it has read an
1157 old-format file, and it generates new data and writes a new file. This
1158 means that you can't go back to an older release without removing the
1159 file.
1160
1161PH/03 A redirect router that has both "unseen" and "one_time" set does not
1162 work if there are any delivery delays because "one_time" forces the
1163 parent to be marked "delivered", so its unseen clone is never tried
1164 again. For this reason, Exim now forbids the simultaneous setting of
1165 these two options.
1166
1167PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1168 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1169 entry if you want to know the details. The fix, however, neglected to
1170 consider the case when local delivery batching is involved. The test for
1171 "previously delivered" was not happening when checking to see if an
1172 address could be batched with a previous (undelivered) one; under
1173 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1174 address.
1a46a8c5
PH
1175
1176PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1177 in its include files, and this causes problems building Exim.
1178
1179PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1180 header_syntax) but Exim was just ignoring anything given after a slash.
1181 In particular, this caused confusion with an attempt to use "verify =
1182 reverse_host_lookup/defer_ok". An error is now given when options are
1183 supplied for verify items that do not have them. (Maybe reverse_host_
1184 lookup should have a defer_ok option, but that's a different point.)
1185
1186PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1187 defined by RFC 821) to 2048, because there were problems with some AUTH
1188 commands, and RFC 1869 says the size should be increased for extended
1189 SMTP commands that take arguments.
1190
1191PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1192 Finch).
1193
1194PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1195 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1196
49c2d5ea
PH
1197PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1198 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1199 whatever). Otherwise the password may appear in the log. Following change
1200 PH/42 below, there is no longer a chance of it appearing in a bounce
1201 message.
49c2d5ea 1202
bf759a8b
PH
1203PH/11 Installed exipick version 20050225.0 from John Jetmore.
1204
83364d30
PH
1205PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1206 of its addresses was ever tried. (Bugzilla bug #2.)
1207
7999bbd7
PH
1208PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1209 the result incorrectly in the debug output. (It correctly added a newline
1210 to what was transported.)
1211
7dbf77c9
PH
1212TF/01 Added $received_time.
1213
74e0617f
PH
1214PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1215 commented out examples of how to interface to a virus scanner and to
1216 SpamAssassin. Also added commented examples of av_scanner and
1217 spamd_address settings.
1218
2f079f46
PH
1219PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1220 and controls are allowed in which ACLs. There were a couple of minor
1221 errors. Some of the entries in the conditions table (which is a table of
1222 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1223 negation of where the condition IS allowed.
1224
8c841523
PH
1225PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1226
7766a4f0
PH
1227PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1228 header file does not have a version number, so I've had to invent a new
1229 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1230 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1231 radiusclient), but it was contributed by a Radius user.
1232
8b417f2c
PH
1233PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1234 files or directories, for OpenSSL.
1235
901f42cb
PH
1236PH/19 When an Exim process that is running as root has to create an Exim log
1237 file, it does so in a subprocess that runs as exim:exim so as to get the
1238 ownership right at creation (otherwise, other Exim processes might see
1239 the file with the wrong ownership). There was no test for failure of this
1240 fork() call, which would lead to the process getting stuck as it waited
1241 for a non-existent subprocess. Forks do occasionally fail when resources
1242 run out. I reviewed all the other calls to fork(); they all seem to check
1243 for failure.
1244
f9b9210e
PH
1245PH/20 When checking for unexpected SMTP input at connect time (before writing
1246 the banner), Exim was not dealing correctly with a non-positive return
1247 from the read() function. If the client had disconnected by this time,
1248 the result was a log entry for a synchronization error with an empty
1249 string after "input=" when read() returned zero. If read() returned -1
1250 (an event I could not check), uninitialized data bytes were printed.
1251 There were reports of junk text (parts of files, etc) appearing after
1252 "input=".
1253
54cdb463
PH
1254PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1255
cf00dad6
PH
1256PH/22 Added support for macro redefinition, and (re)definition in between
1257 driver and ACL definitions.
1258
acb1b346
PH
1259PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1260 forgetting to use the resulting value; it was using the unexpanded value.
1261
c5ddb310
PH
1262PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1263 hadn't been configured. The fix is from Juergen Kreileder, who
1264 understands it better than I do:
1265
1266 "Here's what I see happening with three configured cyrus_sasl
1267 authenticators configured (plain, login, cram-md5):
1268
1269 On startup auth_cyrus_sasl_init() gets called for each of these.
1270 This means three calls to sasl_listmech() without a specified mech_list.
1271 => SASL tests which mechs of all available mechs actually work
1272 => three warnings about OTP not working
1273 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1274
1275 With the patch, sasl_listmech() also gets called three times. But now
1276 SASL's mech_list option is set to the server_mech specified in the the
1277 authenticator. Or in other words, the answer from sasl_listmech()
1278 gets limited to just the mech you're testing for (which is different
1279 for each call.)
1280 => the return list contains just 'plain' or 'login', 'cram-md5' or
1281 nothing depending on the value of ob->server_mech.
1282
1283 I've just tested the patch: Authentication still works fine,
1284 unavailable mechs specified in the exim configuration are still
1285 caught, and the auth.log warnings about OTP are gone."
1286
31619da6
PH
1287PH/25 When debugging is enabled, the contents of the command line are added
1288 to the debugging output, even when log_selector=+arguments is not
1289 specified.
1290
bebaf0fc
PH
1291PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1292 answer is "GNU", and only if the return is "GNU/something" is the answer
1293 "Linux".
1294
475fe28a
PH
1295PH/27 $acl_verify_message is now set immediately after the failure of a
1296 verification in an ACL, and so is available in subsequent modifiers. In
1297 particular, the message can be preserved by coding like this:
1298
1299 warn !verify = sender
1300 set acl_m0 = $acl_verify_message
1301
1302 Previously, $acl_verify_message was set only while expanding "message"
1303 and "log_message" when a very denied access.
1304
7e8bec7a
PH
1305PH/28 Modified OS/os.c-Linux with
1306
1307 -#ifndef OS_LOAD_AVERAGE
1308 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1309
1310 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1311 nomenclature these days.)
1312
e4a89c47
PH
1313PH/29 Installed patch from the Sieve maintainer that adds the options
1314 sieve_useraddress and sieve_subaddress to the redirect router.
1315
5ca2a9a1
PH
1316PH/30 In these circumstances:
1317 . Two addresses routed to the same list of hosts;
1318 . First host does not offer TLS;
1319 . First host accepts first address;
1320 . First host gives temporary error to second address;
1321 . Second host offers TLS and a TLS session is established;
1322 . Second host accepts second address.
1323 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1324 and peerdn, if requested) that were in fact used only for the second
1325 address.
7e8bec7a 1326
c688b954
PH
1327PH/31 When doing a callout as part of verifying an address, Exim was not paying
1328 attention to any local part prefix or suffix that was matched by the
1329 router that accepted the address. It now behaves in the same way as it
1330 does for delivery: the affixes are removed from the local part unless
1331 rcpt_include_affixes is set on the transport.
1332
fed77020
PH
1333PH/32 Add the sender address, as F=<...>, to the log line when logging a
1334 timeout during the DATA phase of an incoming message.
1335
7fe1560f
PH
1336PH/33 Sieve envelope tests were broken for match types other than :is. I have
1337 applied a patch sanctioned by the Sieve maintainer.
c688b954 1338
ebb6e6d5
PH
1339PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1340 the uid or gid is negative. A case of a negative gid caused this to be
1341 noticed. The fix allows for either to be negative.
1342
9c4e8f60
PH
1343PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1344 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1345 overlooked.
1346
1347PH/36 The change PH/12 above was broken. Fixed it.
1348
d7174846
PH
1349PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1350 the grounds that routing the same address twice would always produce the
1351 same answer. This might have been true once, but it is certainly no
1352 longer true now. Routing a child address may depend on the previous
1353 routing that produced that child. Some complicated redirection strategies
1354 went wrong when messages had multiple recipients, and made Exim's
1355 behaviour dependent on the order in which the addresses were given.
1356
1357 I have moved the duplicate checking until after the routing is complete.
1358 Exim scans the addresses that are assigned to local and remote
1359 transports, and removes any duplicates. This means that more work will be
1360 done, as duplicates will always all be routed, but duplicates are
1361 presumably rare, so I don't expect this is of any significance.
1362
1363 For deliveries to pipes, files, and autoreplies, the duplicate checking
1364 still happens during the routing process, since they are not going to be
1365 routed further.
1366
cfe75fc3
PH
1367PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1368 It corrects a timeout issue with spamd. This is Ian's comment: "The
1369 background is that sometimes spamd either never reads data from a
1370 connection it has accepted, or it never writes response data. The exiscan
1371 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1372 blindly assumes that writes won't block so it may never time out."
1373
be22d70e
PH
1374PH/39 Allow G after quota size as well as K and M.
1375
0612b098
PH
1376PH/40 The value set for $authenticated_id in an authenticator may not contain
1377 binary zeroes or newlines because the value is written to log lines and
1378 to spool files. There was no check on this. Now the value is run through
1379 the string_printing() function so that such characters are converted to
1380 printable escape sequences.
1381
2e0c1448
PH
1382PH/41 $message_linecount is a new variable that contains the total number of
1383 lines in the message. Compare $body_linecount, which is the count for the
1384 body only.
1385
447d236c
PH
1386PH/42 Exim no longer gives details of delivery errors for specific addresses in
1387 bounce and delay warning messages, except in certain special cases, which
1388 are as follows:
1389
1390 (a) An SMTP error message from a remote host;
1391 (b) A message specified in a :fail: redirection;
1392 (c) A message specified in a "fail" command in a system filter;
1393 (d) A message specified in a FAIL return from the queryprogram router;
1394 (e) A message specified by the cannot_route_message router option.
1395
1396 In these cases only, Exim does include the error details in bounce and
1397 warning messages. There are also a few cases where bland messages such
1398 as "unrouteable address" or "local delivery error" are given.
1399
d20976dc
PH
1400PH/43 $value is now also set for the "else" part of a ${run expansion.
1401
f656d135
PH
1402PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1403 being worked on, but at least Exim now implements the latest version to
1404 play with."
1405
2e2a30b4
PH
1406PH/45 In a pipe transport, although a timeout while waiting for the pipe
1407 process to complete was treated as a delivery failure, a timeout while
1408 writing the message to the pipe was logged, but erroneously treated as a
1409 successful delivery. Such timeouts include transport filter timeouts. For
1410 consistency with the overall process timeout, these timeouts are now
1411 treated as errors, giving rise to delivery failures by default. However,
1412 there is now a new Boolean option for the pipe transport called
1413 timeout_defer, which, if set TRUE, converts the failures into defers for
1414 both kinds of timeout. A transport filter timeout is now identified in
1415 the log output.
1416
9176e9f0
PH
1417PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1418 systems where "make" and "gmake" are different, calling "gmake" at top
1419 level broke things. I've arranged for the value of $(MAKE) to be passed
1420 from the Makefile to this script so that it can call the same version of
1421 "make".
1422
7982096b 1423
bbe902f0
PH
1424A note about Exim versions 4.44 and 4.50
1425----------------------------------------
1426
1427Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1428changes of various kinds. As a consequence, a big documentation update was
1429needed. This delayed the release for rather longer than seemed good, especially
1430in the light of a couple of (minor) security issues. Therefore, the changes
1431that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1432release. So 4.44 and 4.50 are in effect two different branches that both start
1433from 4.43.
1434
1435I have left the 4.50 change log unchanged; it contains all the changes since
14364.43. The change log for 4.44 is below; many of its items are identical to
1437those for 4.50. This seems to be the most sensible way to preserve the
1438historical information.
1439
1440
f7b63901 1441Exim version 4.50
495ae4b0
PH
1442-----------------
1443
5fe762f6
PH
1444 1. Minor wording change to the doc/README.SIEVE file.
1445
139059f6 1446 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1447 computation of the current number of files was incorrect.
495ae4b0 1448
7086e875
PH
1449 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1450 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1451 place.
1452
35af9f61
PH
1453 4. Give more explanation in the error message when the command for a transport
1454 filter fails to execute.
1455
b668c215
PH
1456 5. There are several places where Exim runs a non-Exim command in a
1457 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1458 was being done only for the command run by the queryprogram router. It is
1459 now done for all such subprocesses. The other cases are: ${run, transport
1460 filters, and the commands run by the lmtp and pipe transports.
1461
a494b1e1
PH
1462 6. Added CONFIGURE_GROUP build-time option.
1463
1464 7. Some older OS have a limit of 256 on the maximum number of file
1465 descriptors. Exim was using setrlimit() to set 1000 as a large value
1466 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1467 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1468
c5fcb476
PH
1469 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1470 was an oversight, and furthermore, ever since the addition of extra
1471 controls (e.g. 4.43/32), the checks on when to allow different forms of
1472 "control" were broken. There should now be diagnostics for all cases when a
1473 control that does not make sense is encountered.
1474
69358f02
PH
1475 9. Added the /retain_sender option to "control=submission".
1476
5be20824
PH
147710. $recipients is now available in the predata ACL (oversight).
1478
eb2c0248
PH
147911. Tidy the search cache before the fork to do a delivery from a message
1480 received from the command line. Otherwise the child will trigger a lookup
1481 failure and thereby defer the delivery if it tries to use (for example) a
1482 cached ldap connection that the parent has called unbind on.
1483
2a3eea10
PH
148412. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1485 of $address_data from the recipient verification was clobbered by the
1486 sender verification.
1487
148813. The value of address_data from a sender verification is now available in
1489 $sender_address_data in subsequent conditions in the ACL statement.
1490
23c7ff99
PH
149114. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1492
4deaf07d
PH
149315. Added a new option "connect=<time>" to callout options, to set a different
1494 connection timeout.
1495
926e1192
PH
149616. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1497 was its contents. (It was OK if the option was not defined at all.)
1498
650edc6f
PH
149917. A "Completed" log line is now written for messages that are removed from
1500 the spool by the -Mrm option.
1501
2c7db3f5
PH
150218. New variables $sender_verify_failure and $recipient_verify_failure contain
1503 information about exactly what failed.
1504
3d235903
PH
150519. Added -dd to debug only the daemon process.
1506
7c7ad977
PH
150720. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1508 handles timeouts, both on the server side and network timeouts. Renamed the
1509 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1510
981756db
PH
151121. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1512 It is now set to "smtps".
1513
d4eb88df
PH
151422. $host_address is now set to the target address during the checking of
1515 ignore_target_hosts.
1516
151723. When checking ignore_target_hosts for an ipliteral router, no host name was
1518 being passed; this would have caused $sender_host_name to have been used if
1519 matching the list had actually called for a host name (not very likely,
1520 since this list is usually IP addresses). A host name is now passed as
1521 "[x.x.x.x]".
1522
7d468ab8
PH
152324. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1524 code that specifies a non-restarting handler (typically sigaction() in
1525 modern systems) in an attempt to fix a rare and obscure crash bug.
1526
152725. Narrowed the window for a race in the daemon that could cause it to ignore
1528 SIGCHLD signals. This is not a major problem, because they are used only to
1529 wake it up if nothing else does.
1530
62c0818f
PH
153126. A malformed maildirsize file could cause Exim to calculate negative values
1532 for the mailbox size or file count. Odd effects could occur as a result.
1533 The maildirsize information is now recalculated if the size or filecount
1534 end up negative.
1535
26034054
PH
153627. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1537 support for a long time. Removed HAVE_SYS_VFS_H.
1538
af66f652
PH
153928. Installed the latest version of exipick from John Jetmore.
1540
90af77f4
PH
154129. In an address list, if the pattern was not a regular expression, an empty
1542 subject address (from a bounce message) matched only if the pattern was an
1543 empty string. Non-empty patterns were not even tested. This was the wrong
1544 because it is perfectly reasonable to use an empty address as part of a
1545 database query. An empty address is now tested by patterns that are
1546 lookups. However, all the other forms of pattern expect the subject to
1547 contain a local part and a domain, and therefore, for them, an empty
1548 address still always fails if the pattern is not itself empty.
1549
d8ef3577
PH
155030. Exim went into a mad DNS loop when attempting to do a callout where the
1551 host was specified on an smtp transport, and looking it up yielded more
1552 than one IP address.
1553
5cb8cbc6
PH
155431. Re-factored the code for checking spool and log partition space into a
1555 function that finds that data and another that does the check. The former
1556 is then used to implement four new variables: $spool_space, $log_space,
1557 $spool_inodes, and $log_inodes.
1558
14702f5b
PH
155932. The RFC2047 encoding function was originally intended for short strings
1560 such as real names; it was not keeping to the 75-character limit for
1561 encoded words that the RFC imposes. It now respects the limit, and
1562 generates multiple encoded words if necessary. To be on the safe side, I
1563 have increased the buffer size for the ${rfc2047: expansion operator from
1564 1024 to 2048 bytes.
1565
063b1e99
PH
156633. It is now permitted to omit both strings after an "if" condition; if the
1567 condition is true, the result is "true". As before, when the second string
1568 is omitted, a false condition yields an empty string. This makes it less
1569 cumbersome to write custom ACL and router conditions.
1570
652e1b65
PH
157134. Failure to deliver a bounce message always caused it to be frozen, even if
1572 there was an errors_to setting on the router. The errors_to setting is now
1573 respected.
1574
6f0c9a4f
PH
157535. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1576 canonical form (fully expanded) before being placed in
1577 $sender_host_address.
1578
33397d19
PH
157936. The table in the code that translates DNS record types into text (T_A to
1580 "A" for instance) was missing entries for NS and CNAME. It is just possible
1581 that this could have caused confusion if both these types were looked up
1582 for the same domain, because the text type is used as part of Exim's
1583 per-process caching. But the chance of anyone hitting this buglet seems
1584 very small.
1585
7bb56e1f
PH
158637. The dnsdb lookup has been extended in a number of ways.
1587
1588 (1) There is a new type, "zns", which walks up the domain tree until it
1589 finds some nameserver records. It should be used with care.
1590
ea3bc19b
PH
1591 (2) There is a new type, "mxh", which is like "mx" except that it returns
1592 just the host names, not the priorities.
1593
1594 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1595 looked up. The behaviour when one of the lookups defers can be
1596 controlled by a keyword.
7bb56e1f 1597
ea3bc19b 1598 (4) It is now possible to specify the separator character for use when
7bb56e1f 1599 multiple records are returned.
33397d19 1600
0bcb2a0e
PH
160138. The dnslists ACL condition has been extended: it is now possible to supply
1602 a list of IP addresses and/or domains to be looked up in a particular DNS
1603 domain.
1604
2ac0e484
PH
160539. Added log_selector=+queue_time_overall.
1606
4e1fde53
PH
160740. When running the queue in the test harness, wait just a tad after forking a
1608 delivery process, to get repeatability of debugging output.
1609
de365ded
PH
161041. Include certificate and key file names in error message when GnuTLS fails
1611 to set them up, because the GnuTLS error message doesn't include the name
1612 of the failing file when there is a problem reading it.
1613
f05da2e8
PH
161442. Allow both -bf and -bF in the same test run.
1615
d6453af2
PH
161643. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1617
f7b63901
PH
161844. The "Exiscan patch" is now merged into the mainline Exim source.
1619
162045. Sometimes the final signoff response after QUIT could fail to get
1621 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1622 < 0 before doing a fflush(). This bug looks as though it goes back to the
1623 introduction of TLS in release 3.20, but "sometimes" must have been rare
1624 because the tests only now provoked it.
1625
a444213a
PH
162646. Reset the locale to "C" after calling embedded Perl, in case it was changed
1627 (this can affect the format of dates).
1628
0ec020ea
PH
162947. exim_tidydb, when checking for the continued existence of a message for
1630 which it has found a message-specific retry record, was not finding
1631 messages that were in split spool directories. Consequently, it was
1632 deleting retry records that should have stayed in existence.
1633
b1206957
PH
163448. Steve fixed some bugs in eximstats.
1635
163649. The SPA authentication driver was not abandoning authentication and moving
1637 on to the next authenticator when an expansion was forced to fail,
1638 contradicting the general specification for all authenticators. Instead it
1639 was generating a temporary error. It now behaves as specified.
1640
26dd5a95
PH
164150. The default ordering of permitted cipher suites for GnuTLS was pessimal
1642 (the order specifies the preference for clients). The order is now AES256,
1643 AES128, 3DES, ARCFOUR128.
1644
343b2385
PH
164551. Small patch to Sieve code - explicitly set From: when generating an
1646 autoreply.
1647
1c5466b9
PH
164852. Exim crashed if a remote delivery caused a very long error message to be
1649 recorded - for instance if somebody sent an entire SpamAssassin report back
1650 as a large number of 550 error lines. This bug was coincidentally fixed by
1651 increasing the size of one of Exim's internal buffers (big_buffer) that
1652 happened as part of the Exiscan merge. However, to be on the safe side, I
1653 have made the code more robust (and fixed the comments that describe what
1654 is going on).
1655
55ee9ee3
PH
165653. Now that there can be additional text after "Completed" in log lines (if
1657 the queue_time_overall log selector is set), a one-byte patch to exigrep
1658 was needed to allow it to recognize "Completed" as not the last thing in
1659 the line.
1660
d38f8232
PH
166154. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1662 patch that reportedly fixes this has been added. I am not expert enough to
1663 create a test for it. This is what the patch creator wrote:
1664
1665 "I found a little strange behaviour of ldap code when working with
1666 Windows 2003 AD Domain, where users was placed in more than one
1667 Organization Units. When I tried to give exim partial DN, the exit code
1668 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1669 But simultaneously result of request was absolutely normal ldap result,
1670 so I produce this patch..."
1671
3295e65b
PH
1672 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1673 REFERENCE, so I have modified the code to exclude the patch when that macro
1674 is not defined.
1675
7102e136
PH
167655. Some experimental protocols are using DNS PTR records for new purposes. The
1677 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1678 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1679 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1680 CAN-2005-0021
7102e136 1681
3ca0ba97
PH
168256. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1683
c2bcbe20
PH
168457. Double the size of the debug message buffer (to 2048) so that more of very
1685 long debug lines gets shown.
1686
18ce445d
PH
168758. The exicyclog utility now does better if the number of log files to keep
1688 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1689
1f5b4c3d
PH
169059. Two changes related to the smtp_active_hostname option:
1691
1692 (1) $smtp_active_hostname is now available as a variable.
1693 (2) The default for smtp_banner uses $smtp_active_hostname instead
1694 of $primary_hostname.
1695
b975ba52
PH
169660. The host_aton() function is supposed to be passed a string that is known
1697 to be a valid IP address. However, in the case of IPv6 addresses, it was
1698 not checking this. This is a hostage to fortune. Exim now panics and dies
1699 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1700 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1701 components; fortuitously, this particular loophole had already been fixed
1702 by change 4.50/55 above.
1703
1704 If there are any other similar loopholes, the new check in host_aton()
1705 itself should stop them being exploited. The report I received stated that
1706 data on the command line could provoke the exploit when Exim was running as
1707 exim, but did not say which command line option was involved. All I could
1708 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1709 running as the user.
ea3a6f44 1710 CAN-2005-0021
85b87bc2
PH
1711
171261. There was a buffer overflow vulnerability in the SPA authentication code
1713 (which came originally from the Samba project). I have added a test to the
1714 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1715 CAN-2005-0022
b975ba52 1716
17ffcae7
PH
171762. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1718 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1719
d95f9fdb
PH
172063. The daemon start-up calls getloadavg() while still root for those OS that
1721 need the first call to be done as root, but it missed one case: when
1722 deliver_queue_load_max is set with deliver_drop_privilege. This is
1723 necessary for the benefit of the queue runner, because there is no re-exec
1724 when deliver_drop_privilege is set.
1725
86b8287f
PH
172664. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1727 This has been fixed.
1728
60dc5e56
PH
172965. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1730 was in use, was not putting the data itself into the right store pool;
1731 consequently, it could be overwritten for a subsequent message in the same
1732 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1733 the caching.)
1734
533244af
PH
173566. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1736
a5a28604
PH
173767. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1738 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1739 the function were treating the return as a boolean value, which happened to
1740 work because 0=false and not-0=true, but is not correct code.
1741
7e634d24
PH
174268. The host_aton() function was not handling scoped IPv6 addresses (those
1743 with, for example, "%eth0" on the end) correctly.
1744
3e11c26b
PH
174569. Fixed some compiler warnings in acl.c for the bitmaps specified with
1746 negated items (that is, ~something) in unsigned ints. Some compilers
1747 apparently mutter when there is no cast.
1748
6729cf78
PH
174970. If an address verification called from an ACL failed, and did not produce a
1750 user-specific message (i.e. there was only a "system" message), nothing was
1751 put in $acl_verify_message. In this situation, it now puts the system
1752 message there.
1753
00f00ca5
PH
175471. Change 4.23/11 added synchronization checking at the start of an SMTP
1755 session; change 4.31/43 added the unwanted input to the log line - except
1756 that it did not do this in the start of session case. It now does.
1757
c9bdd01c
PH
175872. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1759 This is wrong and can cause the other end to generate a synchronization
1760 error if it is another Exim or anything else that does the synchronization
1761 check. A QUIT command is no longer sent after a timeout.
1762
d43194df
PH
176373. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1764 during host lookups.
1765
fe5b5d0b
PH
176674. The defer_ok option of callout verification was not working if it was used
1767 when verifying addresses in header lines, that is, for this case:
1768
1769 verify = header_sender/callout=defer_ok
1770
76a2d7ba
PH
177175. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1772 those file descriptors could be used for SMTP connections. If anything
1773 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1774 could be sent to the SMTP client, causing chaos. The daemon now opens
1775 stdin, stdout, and stderr to /dev/null when it puts itself into the
1776 background.
1777
177876. Arrange for output from Perl's "warn" command to be written to Exim's main
1779 log by default. The user can override this with suitable Perl magic.
1780
04f7d5b9
PH
178177. The use of log_message on a "discard" ACL verb, which is supposed to add to
1782 the log message when discard triggers, was not working for the DATA ACL or
1783 for the non-SMTP ACL.
1784
bc60667e
PH
178578. Error message wording change in sieve.c.
1786
bb6e88ff
PH
178779. If smtp_accept_max_per_host was set, the number of connections could be
1788 restricted to fewer than expected, because the daemon was trying to set up
1789 a new connection before checking whether the processes handling previous
1790 connections had finished. The check for completed processes is now done
1791 earlier. On busy systems, this bug wouldn't be noticed because something
1792 else would have woken the daemon, and it would have reaped the completed
1793 process earlier.
1794
1e70f85b
PH
179580. If a message was submitted locally by a user whose login name contained one
1796 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1797 It caused a spool format error. I have fixed the spool reading code. A
1798 related problem was that the "from" clause in the Received: line became
1799 illegal because of the space(s). It is now covered by ${quote_local_part.
1800
180181. Included the latest eximstats from Steve (adds average sizes to HTML Top
1802 tables).
1803
4e01f9d6
PH
180482. Updated OS/Makefile-AIX as per message from Mike Meredith.
1805
1ee1cef2
PH
180683. Patch from Sieve maintainer to fix unterminated string problem in
1807 "vacation" handling.
1808
6e2b4ccc
PH
180984. Some minor changes to the Linux configuration files to help with other
1810 OS variants using glibc.
1811
8e669ac1
PH
181285. One more patch for Sieve to update vacation handling to latest spec.
1813
495ae4b0 1814
bbe902f0
PH
1815----------------------------------------------------
1816See the note above about the 4.44 and 4.50 releases.
1817----------------------------------------------------
1818
1819
1820Exim version 4.44
1821-----------------
1822
1823 1. Change 4.43/35 introduced a bug that caused file counts to be
1824 incorrectly computed when quota_filecount was set in an appendfile
1825 transport
1826
1827 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1828 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1829 place.
1830
1831 3. Give more explanation in the error message when the command for a transport
1832 filter fails to execute.
1833
1834 4. There are several places where Exim runs a non-Exim command in a
1835 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1836 was being done only for the command run by the queryprogram router. It is
1837 now done for all such subprocesses. The other cases are: ${run, transport
1838 filters, and the commands run by the lmtp and pipe transports.
1839
1840 5. Some older OS have a limit of 256 on the maximum number of file
1841 descriptors. Exim was using setrlimit() to set 1000 as a large value
1842 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1843 systems. I've change it so that if it can't get 1000, it tries for 256.
1844
1845 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1846 was an oversight, and furthermore, ever since the addition of extra
1847 controls (e.g. 4.43/32), the checks on when to allow different forms of
1848 "control" were broken. There should now be diagnostics for all cases when a
1849 control that does not make sense is encountered.
1850
1851 7. $recipients is now available in the predata ACL (oversight).
1852
1853 8. Tidy the search cache before the fork to do a delivery from a message
1854 received from the command line. Otherwise the child will trigger a lookup
1855 failure and thereby defer the delivery if it tries to use (for example) a
1856 cached ldap connection that the parent has called unbind on.
1857
1858 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1859 of $address_data from the recipient verification was clobbered by the
1860 sender verification.
1861
186210. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1863 was its contents. (It was OK if the option was not defined at all.)
1864
186511. A "Completed" log line is now written for messages that are removed from
1866 the spool by the -Mrm option.
1867
186812. $host_address is now set to the target address during the checking of
1869 ignore_target_hosts.
1870
187113. When checking ignore_target_hosts for an ipliteral router, no host name was
1872 being passed; this would have caused $sender_host_name to have been used if
1873 matching the list had actually called for a host name (not very likely,
1874 since this list is usually IP addresses). A host name is now passed as
1875 "[x.x.x.x]".
1876
187714. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1878 code that specifies a non-restarting handler (typically sigaction() in
1879 modern systems) in an attempt to fix a rare and obscure crash bug.
1880
188115. Narrowed the window for a race in the daemon that could cause it to ignore
1882 SIGCHLD signals. This is not a major problem, because they are used only to
1883 wake it up if nothing else does.
1884
188516. A malformed maildirsize file could cause Exim to calculate negative values
1886 for the mailbox size or file count. Odd effects could occur as a result.
1887 The maildirsize information is now recalculated if the size or filecount
1888 end up negative.
1889
189017. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1891 support for a long time. Removed HAVE_SYS_VFS_H.
1892
ea3a6f44 189318. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1894
189519. Allow an empty sender to be matched against a lookup in an address list.
1896 Previously the only cases considered were a regular expression, or an
1897 empty pattern.
1898
189920. Exim went into a mad DNS lookup loop when doing a callout where the
1900 host was specified on the transport, if the DNS lookup yielded more than
1901 one IP address.
1902
ea3a6f44
NM
190321. The RFC2047 encoding function was originally intended for short strings
1904 such as real names; it was not keeping to the 75-character limit for
1905 encoded words that the RFC imposes. It now respects the limit, and
1906 generates multiple encoded words if necessary. To be on the safe side, I
1907 have increased the buffer size for the ${rfc2047: expansion operator from
1908 1024 to 2048 bytes.
bbe902f0 1909
ea3a6f44
NM
191022. Failure to deliver a bounce message always caused it to be frozen, even if
1911 there was an errors_to setting on the router. The errors_to setting is now
1912 respected.
bbe902f0
PH
1913
191423. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1915 canonical form (fully expanded) before being placed in
1916 $sender_host_address.
1917
191824. Updated eximstats to version 1.33
1919
ea3a6f44
NM
192025. Include certificate and key file names in error message when GnuTLS fails
1921 to set them up, because the GnuTLS error message doesn't include the name
1922 of the failing file when there is a problem reading it.
bbe902f0
PH
1923
192426. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1925 As per change 25.
bbe902f0 1926
ea3a6f44
NM
192727. Reset the locale to "C" after calling embedded Perl, in case it was changed
1928 (this can affect the format of dates).
bbe902f0 1929
ea3a6f44
NM
193028. exim_tidydb, when checking for the continued existence of a message for
1931 which it has found a message-specific retry record, was not finding
1932 messages that were in split spool directories. Consequently, it was
1933 deleting retry records that should have stayed in existence.
bbe902f0
PH
1934
193529. eximstats updated to version 1.35
1936 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1937 1.35 - bugfix such that pie charts by volume are generated correctly
1938
ea3a6f44
NM
193930. The SPA authentication driver was not abandoning authentication and moving
1940 on to the next authenticator when an expansion was forced to fail,
1941 contradicting the general specification for all authenticators. Instead it
1942 was generating a temporary error. It now behaves as specified.
bbe902f0 1943
ea3a6f44
NM
194431. The default ordering of permitted cipher suites for GnuTLS was pessimal
1945 (the order specifies the preference for clients). The order is now AES256,
1946 AES128, 3DES, ARCFOUR128.
bbe902f0 1947
ea3a6f44
NM
194831. Small patch to Sieve code - explicitly set From: when generating an
1949 autoreply.
bbe902f0 1950
ea3a6f44
NM
195132. Exim crashed if a remote delivery caused a very long error message to be
1952 recorded - for instance if somebody sent an entire SpamAssassin report back
1953 as a large number of 550 error lines. This bug was coincidentally fixed by
1954 increasing the size of one of Exim's internal buffers (big_buffer) that
1955 happened as part of the Exiscan merge. However, to be on the safe side, I
1956 have made the code more robust (and fixed the comments that describe what
1957 is going on).
bbe902f0 1958
ea3a6f44
NM
195933. Some experimental protocols are using DNS PTR records for new purposes. The
1960 keys for these records are domain names, not reversed IP addresses. The
1961 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1962 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1963 CAN-2005-0021
1964
ea3a6f44
NM
196534. The host_aton() function is supposed to be passed a string that is known
1966 to be a valid IP address. However, in the case of IPv6 addresses, it was
1967 not checking this. This is a hostage to fortune. Exim now panics and dies
1968 if the condition is not met. A case was found where this could be provoked
1969 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1970 components; fortuitously, this particular loophole had already been fixed
1971 by change 4.50/55 or 4.44/33 above.
1972
1973 If there are any other similar loopholes, the new check in host_aton()
1974 itself should stop them being exploited. The report I received stated that
1975 data on the command line could provoke the exploit when Exim was running as
1976 exim, but did not say which command line option was involved. All I could
1977 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1978 running as the user.
bbe902f0
PH
1979 CAN-2005-0021
1980
ea3a6f44
NM
198135. There was a buffer overflow vulnerability in the SPA authentication code
1982 (which came originally from the Samba project). I have added a test to the
1983 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1984 CAN-2005-0022
1985
ea3a6f44
NM
198636. The daemon start-up calls getloadavg() while still root for those OS that
1987 need the first call to be done as root, but it missed one case: when
1988 deliver_queue_load_max is set with deliver_drop_privilege. This is
1989 necessary for the benefit of the queue runner, because there is no re-exec
1990 when deliver_drop_privilege is set.
bbe902f0 1991
ea3a6f44
NM
199237. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1993 was in use, was not putting the data itself into the right store pool;
1994 consequently, it could be overwritten for a subsequent message in the same
1995 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1996 the caching.)
bbe902f0 1997
ea3a6f44
NM
199838. Sometimes the final signoff response after QUIT could fail to get
1999 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2000 < 0 before doing a fflush(). This bug looks as though it goes back to the
2001 introduction of TLS in release 3.20, but "sometimes" must have been rare
2002 because the tests only now provoked it.
bbe902f0
PH
2003
2004
495ae4b0
PH
2005Exim version 4.43
2006-----------------
2007
2008 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2009 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2010 Now it returns an integer. A number of calls were still expecting a T/F
2011 return. Fortuitously, in all cases, the tests worked in OK situations,
2012 which is the norm. However, things would have gone wrong on any write
2013 failures on the smtp file descriptor. This function is used when sending
2014 messages over SMTP and also when doing verify callouts.
2015
2016 2. When Exim is called to do synchronous delivery of a locally submitted
2017 message (the -odf or -odi options), it no longer closes stderr before doing
2018 the delivery.
2019
2020 3. Implemented the mua_wrapper option.
2021
2022 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2023
2024 5. Implemented the functions header_remove(), header_testname(),
2025 header_add_at_position(), and receive_remove_recipient(), and exported them
2026 to local_scan().
2027
2028 6. If an ACL "warn" statement specified the addition of headers, Exim already
2029 inserted X-ACL-Warn: at the start if there was no header name. However, it
2030 was not making this test for the second and subsequent header lines if
2031 there were newlines in the string. This meant that an invalid header could
2032 be inserted if Exim was badly configured.
2033
2034 7. Allow an ACL "warn" statement to add header lines at the start or after all
2035 the Received: headers, as well as at the end.
2036
2037 8. Added the rcpt_4xx retry error code.
2038
2039 9. Added postmaster_mailfrom=xxx to callout verification option.
2040
204110. Added mailfrom=xxxx to the callout verification option, for verify=
2042 header_sender only.
2043
204411. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2045 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2046
204712. Inserted some casts to stop certain compilers warning when using pointer
2048 differences as field lengths or precisions in printf-type calls (mostly
2049 affecting debugging statements).
2050
205113. Added optional readline() support for -be (dynamically loaded).
2052
205314. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2054 same clock tick as a message's arrival, so that its received time was the
2055 same as the "first fail" time on the retry record, and that message
2056 remained on the queue past the ultimate address timeout, every queue runner
2057 would try a delivery (because it was past the ultimate address timeout) but
2058 after another failure, the ultimate address timeout, which should have then
2059 bounced the address, did not kick in. This was a "< instead of <=" error;
2060 in most cases the first failure would have been in the next clock tick
2061 after the received time, and all would be well.
2062
206315. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2064 being recognized when the domain list was tested by the match_domain
2065 condition in an expansion string.
2066
206716. Added the ${str2b64: operator.
2068
206917. Exim was always calling setrlimit() to set a large limit for the number of
2070 processes, without checking whether the existing limit was already
2071 adequate. (It did check for the limit on file descriptors.) Furthermore,
2072 errors from getrlimit() and setrlimit() were being ignored. Now they are
2073 logged to the main and panic logs, but Exim does carry on, to try to do its
2074 job under whatever limits there are.
2075
207618. Imported PCRE 5.0.
2077
207819. Trivial typo in log message " temporarily refused connection" (the leading
2079 space).
2080
208120. If the log selector return_path_on_delivery was set and an address was
2082 redirected to /dev/null, the delivery process crashed because it assumed
2083 that a return path would always be set for a "successful" delivery. In this
2084 case, the whole delivery is bypassed as an optimization, and therefore no
2085 return path is set.
2086
208721. Internal re-arrangement: the function for sending a challenge and reading
2088 a response while authentication was assuming a zero-terminated challenge
2089 string. It's now changed to take a pointer and a length, to allow for
2090 binary data in such strings.
2091
209222. Added the cyrus_sasl authenticator (code supplied by MBM).
2093
209423. Exim was not respecting finduser_retries when seeking the login of the
2095 uid under which it was called; it was always trying 10 times. (The default
2096 setting of finduser_retries is zero.) Also, it was sleeping after the final
2097 failure, which is pointless.
2098
209924. Implemented tls_on_connect_ports.
2100
210125. Implemented acl_smtp_predata.
2102
210326. If the domain in control=submission is set empty, Exim assumes that the
2104 authenticated id is a complete email address when it generates From: or
2105 Sender: header lines.
2106
210727. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2108 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2109 chown and chgrp in /bin and hostname in /usr/bin.
2110
211128. Exim was keeping the "process log" file open after each use, just as it
2112 does for the main log. This opens the possibility of it remaining open for
2113 long periods when the USR1 signal hits a daemon. Occasional processlog
2114 errors were reported, that could have been caused by this. Anyway, it seems
2115 much more sensible not to leave this file open at all, so that is what now
2116 happens.
2117
211829. The long-running daemon process does not normally write to the log once it
2119 has entered its main loop, and it closes the log before doing so. This is
2120 so that log files can straightforwardly be renamed and moved. However,
2121 there are a couple of unusual error situations where the daemon does write
2122 log entries, and I had neglected to close the log afterwards.
2123
212430. The text of an SMTP error response that was received during a remote
2125 delivery was being truncated at 512 bytes. This is too short for some of
2126 the long messages that one sometimes sees. I've increased the limit to
2127 1024.
2128
212931. It is now possible to make retry rules that apply only when a message has a
2130 specific sender, in particular, an empty sender.
2131
213232. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2133 it possible to be selective about when SMTP synchronization is enforced.
2134
213533. Added "control = caseful_local_part" and "control = "caselower_local_part".
2136
213732. Implemented hosts_connection_nolog.
2138
213933. Added an ACL for QUIT.
2140
214134. Setting "delay_warning=" to disable warnings was not working; it gave a
2142 syntax error.
2143
214435. Added mailbox_size and mailbox_filecount to appendfile.
2145
214636. Added control = no_multiline_responses to ACLs.
2147
214837. There was a bug in the logic of the code that waits for the clock to tick
2149 in the case where the clock went backwards by a substantial amount such
2150 that the microsecond fraction of "now" was more than the microsecond
2151 fraction of "then" (but the whole seconds number was less).
2152
215338. Added support for the libradius Radius client library this is found on
2154 FreeBSD (previously only the radiusclient library was supported).
2155
2156
2157Exim version 4.42
2158-----------------
2159
2160 1. When certain lookups returned multiple values in the form name=value, the
2161 quoting of the values was not always being done properly. Specifically:
2162 (a) If the value started with a double quote, but contained no whitespace,
2163 it was not quoted.
2164 (b) If the value contained whitespace other than a space character (i.e.
2165 tabs or newlines or carriage returns) it was not quoted.
2166 This fix has been applied to the mysql and pgsql lookups by writing a
2167 separate quoting function and calling it from the lookup code. The fix
2168 should probably also be applied to nisplus, ibase and oracle lookups, but
2169 since I cannot test any of those, I have not disturbed their existing code.
2170
2171 2. A hit in the callout cache for a specific address caused a log line with no
2172 reason for rejecting RCPT. Now it says "Previous (cached) callout
2173 verification failure".
2174
2175 3. There was an off-by-one bug in the queryprogram router. An over-long
2176 return line was truncated at 256 instead of 255 characters, thereby
2177 overflowing its buffer with the terminating zero. As well as fixing this, I
2178 have increased the buffer size to 1024 (and made a note to document this).
2179
2180 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2181 when Exim is waiting for an SMTP response from a remote server, Exim
2182 restarts its select() call on the socket, thereby resetting its timeout.
2183 This is not a problem when such interrupts are rare. Somebody set up a cron
2184 job to run exiwhat every 2 minutes, which is less than the normal select()
2185 timeout (5 or 10 minutes). This meant that the select() timeout never
2186 kicked in because it was always reset. I have fixed this by comparing the
2187 time when an interrupt arrives with the time at the start of the first call
2188 to select(). If more time than the timeout has elapsed, the interrupt is
2189 treated as a timeout.
2190
2191 5. Some internal re-factoring in preparation for the addition of Sieve
2192 extensions (by MH). In particular, the "personal" test is moved to a
2193 separate function, and given an option for scanning Cc: and Bcc: (which is
2194 not set for Exim filters).
2195
2196 6. When Exim created an email address using the login of the caller as the
2197 local part (e.g. when creating a From: or Sender: header line), it was not
2198 quoting the local part when it contained special characters such as @.
2199
2200 7. Installed new OpenBSD configuration files.
2201
2202 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2203 try to make them clearer.
2204
2205 9. Callout options, other than the timeout value, were being ignored when
2206 verifying sender addresses in header lines. For example, when using
2207
2208 verify = header_sender/callout=no_cache
2209
2210 the cache was (incorrectly) being used.
2211
221210. Added a missing instance of ${EXE} to the exim_install script; this affects
2213 only the Cygwin environment.
2214
221511. When return_path_on_delivery was set as a log selector, if different remote
2216 addresses in the same message used different return paths and parallel
2217 remote delivery occurred, the wrong values would sometimes be logged.
2218 (Whenever a remote delivery process finished, the return path value from
2219 the most recently started remote delivery process was logged.)
2220
222112. RFC 3848 specifies standard names for the "with" phrase in Received: header
2222 lines when AUTH and/or TLS are in use. This is the "received protocol"
2223 field. Exim used to use "asmtp" for authenticated SMTP, without any
2224 indication (in the protocol name) for TLS use. Now it follows the RFC and
2225 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2226 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2227 names appear in log lines as well as in Received: header lines.
2228
222913. Installed MH's patches for Sieve to add the "copy" and "vacation"
2230 extensions, and comparison tests, and to fix some bugs.
2231
223214. Changes to the "personal" filter test:
2233
2234 (1) The test was buggy in that it was just doing the equivalent of
2235 "contains" tests on header lines. For example, if a user's address was
2236 anne@some.where, the "personal" test would incorrectly be true for
2237
2238 To: susanne@some.where
2239
2240 This test is now done by extracting each address from the header in turn,
2241 and checking the entire address. Other tests that are part of "personal"
2242 are now done using regular expressions (for example, to check local parts
2243 of addresses in From: header lines).
2244
2245 (2) The list of non-personal local parts in From: addresses has been
2246 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2247 taken from the Sieve specification recommendations.
2248
2249 (3) If the message contains any header line starting with "List-" it is
2250 treated as non-personal.
2251
2252 (4) The test for "circular" in the Subject: header line has been removed
2253 because it now seems ill-conceived.
2254
225515. Minor typos in src/EDITME comments corrected.
2256
225716. Installed latest exipick from John Jetmore.
2258
225917. If headers_add on a router specified a text string that was too long for
2260 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2261 of string_sprintf() is now avoided.
2262
226318. $message_body_size was not set (it was always zero) when running the DATA
2264 ACL and the local_scan() function.
2265
226619. For the "mail" command in an Exim filter, no default was being set for
2267 the once_repeat time, causing a random time value to be used if "once" was
2268 specified. (If the value happened to be <= 0, no repeat happened.) The
2269 default is now 0s, meaning "never repeat". The "vacation" command was OK
2270 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2271 (I found it when inspecting the code).
2272
227320. There is now an overall timeout for performing a callout verification. It
2274 defaults to 4 times the callout timeout, which applies to individual SMTP
2275 commands during the callout. The overall timeout applies when there is more
2276 than one host that can be tried. The timeout is checked before trying the
2277 next host. This prevents very long delays if there are a large number of
2278 hosts and all are timing out (e.g. when the network connections are timing
2279 out). The value of the overall timeout can be changed by specifying an
2280 additional sub-option for "callout", called "maxwait". For example:
2281
2282 verify = sender/callout=5s,maxwait=20s
2283
228421. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2285 to the end before writing, but this should make it even safer).
2286
228722. Exim was forgetting that it had advertised PIPELINING for the second and
2288 subsequent messages on an SMTP connection. It was also not resetting its
2289 memory on STARTTLS and an internal HELO.
2290
229123. When Exim logs an SMTP synchronization error within a session, it now
2292 records whether PIPELINING has been advertised or not.
2293
229424. Added 3 instances of "(long int)" casts to time_t variables that were being
2295 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2296 rather than long int.
2297
229825. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2299
230026. Added the never_mail option to autoreply.
2301
2302
2303Exim version 4.41
2304-----------------
2305
2306 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2307 crash if the getsockname() call failed; this can happen if a connection is
2308 closed very soon after it is established. The problem was simply in the
2309 order in which certain operations were done, causing Exim to try to write
2310 to the SMTP stream before it had set up the file descriptor. The bug has
2311 been fixed by making things happen in the correct order.
2312
2313
2314Exim version 4.40
2315-----------------
2316
2317 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2318 before the connection was closed, thus losing the rejection response.
2319
2320 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2321 some early Solaris releases, but causes trouble in current releases where
2322 socklen_t is defined.
2323
2324 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2325 always exist.
2326
2327 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2328 configured.
2329
2330 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2331 that releasing the top of it at the end releases what was used for sub-
2332 expansions (unless the block got too big). However, discard this block if
2333 the first thing is a variable or header, so that we can use its block when
2334 it is dynamic (useful for very large $message_headers, for example).
2335
2336 6. Lookups now cache *every* query, not just the most recent. A new, separate
2337 store pool is used for this. It can be recovered when all lookup caches are
2338 flushed. Lookups now release memory at the end of their result strings.
2339 This has involved some general refactoring of the lookup sources.
2340
2341 7. Some code has been added to the store_xxx() functions to reduce the amount
2342 of flapping under certain conditions.
2343
2344 8. log_incoming_interface used to affect only the <= reception log lines. Now
2345 it causes the local interface and port to be added to several more SMTP log
2346 lines, for example "SMTP connection from", and rejection lines.
2347
2348 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2349
235010. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2351
235211. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2353 could be overwritten at the end of the current message (or the start of a
2354 new message if it was set in a HELO ACL). The value is now preserved for
2355 the duration of the SMTP connection.
2356
235712. If a transport had a headers_rewrite setting, and a matching header line
2358 contained an unqualified address, that address was qualified, even if it
2359 did not match any rewriting rules. The underlying bug was that the values
2360 of the flags that permit the existence of unqualified sender and recipient
2361 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2362 non-local messages, and by -bnq for local messages) were not being
2363 preserved with the message after it was received.
2364
236513. When Exim was logging an SMTP synchronization error, it could sometimes log
2366 "next input=" as part of the text comprising the host identity instead of
2367 the correct text. The code was using the same buffer for two different
2368 strings. However, depending on which order the printing function evaluated
2369 its arguments, the bug did not always show up. Under Linux, for example, my
2370 test suite worked just fine.
2371
237214. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2373 doesn't work with some older versions of Perl. It has been changed to "my",
2374 which in any case is probably the better facility to use.
2375
237615. A really picky compiler found some instances of statements for creating
2377 error messages that either had too many or two few arguments for the format
2378 string.
2379
238016. The size of the buffer for calls to the DNS resolver has been increased
2381 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2382 for addresses that have a lot of PTR records. This alleviates a problem; it
2383 does not fully solve it.
2384
238517. A dnsdb lookup for PTR records that receives more data than will fit in the
2386 buffer now truncates the list and logs the incident, which is the same
2387 action as happens when Exim is looking up a host name and its aliases.
2388 Previously in this situation something unpredictable would happen;
2389 sometimes it was "internal error: store_reset failed".
2390
239118. If a server dropped the connection unexpectedly when an Exim client was
2392 using GnuTLS and trying to read a response, the client delivery process
2393 crashed while trying to generate an error log message.
2394
239519. If a "warn" verb in an ACL added multiple headers to a message in a single
2396 string, for example:
2397
2398 warn message = H1: something\nH2: something
2399
2400 the text was added as a single header line from Exim's point of view
2401 though it ended up OK in the delivered message. However, searching for the
2402 second and subsequent header lines using $h_h2: did not work. This has been
2403 fixed. Similarly, if a system filter added multiple headers in this way,
2404 the routers could not see them.
2405
240620. Expanded the error message when iplsearch is called with an invalid key to
2407 suggest using net-iplsearch in a host list.
2408
240921. When running tests using -bh, any delays imposed by "delay" modifiers in
2410 ACLs are no longer actually imposed (and a message to that effect is
2411 output).
2412
241322. If a "gecos" field in a passwd entry contained escaped characters, in
2414 particular, if it contained a \" sequence, Exim got it wrong when building
2415 a From: or a Sender: header from that name. A second bug also caused
2416 incorrect handling when an unquoted " was present following a character
2417 that needed quoting.
2418
241923. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2420 was not being matched caselessly.
2421
242224. Arranged for all hyphens in the exim.8 source to be escaped with
2423 backslashes.
2424
242525. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2426 properly. Recipient callout cache records were still being keyed to include
2427 the sender, even when use_sender was set false. This led to far more
2428 callouts that were necessary. The sender is no longer included in the key
2429 when use_sender is false.
2430
243126. Added "control = submission" modifier to ACLs.
2432
243327. Added the ${base62d: operator to decode base 62 numbers.
2434
243528. dnsdb lookups can now access SRV records.
2436
243729. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2438 the configuration file.
2439
244030. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2441 (-v) mode. This makes the output for a verbose queue run more intelligible.
2442
244331. Added a use_postmaster feature to recipient callouts.
2444
244532. Added the $body_zerocount variable, containing the number of binary zero
2446 bytes in the message body.
2447
244833. The time of last modification of the "new" subdirectory is now used as the
2449 "mailbox time last read" when there is a quota error for a maildir
2450 delivery.
2451
245234. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2453
245435. Added +ignore_unknown as a special item in host lists.
2455
245636. Code for decoding IPv6 addresses in host lists is now included, even if
2457 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2458 address was recognized as an IP address, but was then not correctly decoded
2459 into binary, causing unexpected and incorrect effects when compared with
2460 another IP address.
2461
2462
2463Exim version 4.34
2464-----------------
2465
2466 1. Very minor rewording of debugging text in manualroute to say "list of
2467 hosts" instead of "hostlist".
2468
2469 2. If verify=header_syntax was set, and a header line with an unqualified
2470 address (no domain) and a large number of spaces between the end of the
2471 name and the colon was received, the reception process suffered a buffer
2472 overflow, and (when I tested it) crashed. This was caused by some obsolete
2473 code that should have been removed. The fix is to remove it!
2474
2475 3. When running in the test harness, delay a bit after writing a bounce
2476 message to get a bit more predictability in the log output.
2477
2478 4. Added a call to search_tidyup() just before forking a reception process. In
2479 theory, someone could use a lookup in the expansion of smtp_accept_max_
2480 per_host which, without the tidyup, could leave open a database connection.
2481
2482 5. Added the variables $recipient_data and $sender_data which get set from a
2483 lookup success in an ACL "recipients" or "senders" condition, or a router
2484 "senders" option, similar to $domain_data and $local_part_data.
2485
2486 6. Moved the writing of debug_print from before to after the "senders" test
2487 for routers.
2488
2489 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2490 problems for message scanning, either using a data ACL, or using
2491 local_scan() because the Received: header was not generated till after they
2492 were called (in order to set the time as the time of reception completion).
2493 I have revised the way this works. The header is now generated after the
2494 body is received, but before the ACL or local_scan() are called. After they
2495 are run, the timestamp in the header is updated.
2496
2497
2498Exim version 4.33
2499-----------------
2500
2501 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2502 before starting a queue runner without re-exec. This happened only when
2503 deliver_drop_privilege was set or when the Exim user was set to root. The
2504 effect of the bug was that timeouts during subsequent deliveries caused
2505 crashes instead of being properly handled. The handler is now left at its
2506 default (and expected) setting.
2507
2508 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2509 message, again when deliver_drop_privilege is set or Exim is run as root.
2510 The bug described in (1) was not present in this case, but the tidying up
2511 of the other signals was missing. I have made the two cases consistent.
2512
2513 3. The ignore_target_hosts setting on a manualroute router was being ignored
2514 for hosts that were looked up using the /MX notation.
2515
2516 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2517 in domain lists.
2518
2519 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2520 operated on the sender address. After changing the $sender_address to <>
2521 for the sender address verify, Exim was re-instated it as the original
2522 (before rewriting) address, but remembering that it had rewritten it, so it
2523 wasn't rewriting it again. This bug also had the effect of breaking the
2524 sender address verification caching when the sender address was rewritten.
2525
2526 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2527 This has been changed so that if the ip literal address matches
2528 ignore_target_hosts, the router declines.
2529
2530 7. Added expansion conditions match_domain, match_address, and match_local_
2531 part (NOT match_host).
2532
2533 8. The placeholder for the Received: header didn't have a length field set.
2534
2535 9. Added code to Exim itself and to exim_lock to test for a specific race
2536 condition that could lead to file corruption when using MBX delivery. The
2537 issue is with the lockfile that is created in /tmp. If this file is removed
2538 after a process has opened it but before that process has acquired a lock,
2539 there is the potential for a second process to recreate the file and also
2540 acquire a lock. This could lead to two Exim processes writing to the file
2541 at the same time. The added code performs the same test as UW imapd; it
2542 checks after acquiring the lock that its file descriptor still refers to
2543 the same named file.
2544
254510. The buffer for building added header lines was of fixed size, 8192 bytes.
2546 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2547 when Exim is built.
2548
254911. Added the smtp_active_hostname option. If used, this will typically be made
2550 to depend on the incoming interface address. Because $interface_address is
2551 not set up until the daemon has forked a reception process, error responses
2552 that can happen earlier (such as "too many connections") no longer contain
2553 a host name.
2554
255512. If an expansion in a condition on a "warn" statement fails because a lookup
2556 defers, the "warn" statement is abandoned, and the next ACL statement is
2557 processed. Previously this caused the whole ACL to be aborted.
2558
255913. Added the iplsearch lookup type.
2560
256114. Added ident_timeout as a log selector.
2562
256315. Added tls_certificate_verified as a log selector.
2564
256516. Added a global option tls_require_ciphers (compare the smtp transport
2566 option of the same name). This controls incoming TLS connections.
2567
256817. I finally figured out how to make tls_require_ciphers do a similar thing
2569 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2570 before starting the TLS session.
2571
257218. Tabs are now shown as \t in -bP output.
2573
257419. If the log selector return_path_on_delivery was set, Exim crashed when
2575 bouncing a message because it had too many Received: header lines.
2576
257720. If two routers both had headers_remove settings, and the first one included
2578 a superfluous trailing colon, the final name in the first list and the
2579 first name in the second list were incorrectly joined into one item (with a
2580 colon in the middle).
2581
2582
2583Exim version 4.32
2584-----------------
2585
2586 1. Added -C and -D options to the exinext utility, mainly to make it easier
2587 to include in the automated testing, but these could be helpful when
2588 multiple configurations are in use.
2589
2590 2. The exinext utility was not formatting the output nicely when there was
2591 an alternate port involved in the retry record key, nor when there was a
2592 message id as well (for retries that were specific to a specific message
2593 and a specific host). It was also confused by IPv6 addresses, because of
2594 the additional colons they contain. I have fixed the IPv4 problem, and
2595 patched it up to do a reasonable job for IPv6.
2596
2597 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2598 delivery, the log line now contains "pipelined" if PIPELINING was used.
2599
2600 4. An SMTP transport process used to panic and die if the bind() call to set
2601 an explicit outgoing interface failed. This has been changed; it is now
2602 treated in the same way as a connect() failure.
2603
2604 5. A reference to $sender_host_name in the part of a conditional expansion
2605 that was being skipped was still causing a DNS lookup. This no longer
2606 occurs.
2607
2608 6. The def: expansion condition was not recognizing references to header lines
2609 that used bh_ and bheader_.
2610
2611 7. Added the _cache feature to named lists.
2612
2613 8. The code for checking quota_filecount in the appendfile transport was
2614 allowing one more file than it should have been.
2615
2616 9. For compatibility with Sendmail, the command line option
2617
2618 -prval:sval
2619
2620 is equivalent to
2621
2622 -oMr rval -oMs sval
2623
2624 and sets the incoming protocol and host name (for trusted callers). The
2625 host name and its colon can be omitted when only the protocol is to be set.
2626 Note the Exim already has two private options, -pd and -ps, that refer to
2627 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2628 "s", but I don't think that's a major issue.
2629
263010. A number of refactoring changes to the code, none of which should affect
2631 Exim's behaviour:
2632
2633 (a) The number of logging options was getting close to filling up the
2634 32-bit word that was used as a bit map. I have split them into two classes:
2635 those that are passed in the argument to log_write(), and those that are
2636 only ever tested independently outside of that function. These are now in
2637 separate 32-bit words, so there is plenty of room for expansion again.
2638 There is no change in the user interface or the logging behaviour.
2639
2640 (b) When building, for example, log lines, the code previously used a
2641 macro that called string_cat() twice, in order to add two strings. This is
2642 not really sufficiently general. Furthermore, there was one instance where
2643 it was actually wrong because one of the argument was used twice, and in
2644 one call a function was used. (As it happened, calling the function twice
2645 did not affect the overall behaviour.) The macro has been replaced by a
2646 function that can join an arbitrary number of extra strings onto a growing
2647 string.
2648
2649 (c) The code for expansion conditions now uses a table and a binary chop
2650 instead of a serial search (which was left over from when there were very
2651 few conditions). Also, it now recognizes conditions like "pam" even when
2652 the relevant support is not compiled in: a suitably worded error message is
2653 given if an attempt is made to use such a condition.
2654
265511. Added ${time_interval:xxxxx}.
2656
265712. A bug was causing one of the ddress fields not to be passed back correctly
2658 from remote delivery subprocesses. The field in question was not being
2659 subsequently used, so this caused to problems in practice.
2660
266113. Added new log selectors queue_time and deliver_time.
2662
266314. Might have fixed a bug in maildirsizefile handling that threw up
2664 "unexpected character" debug warnings, and recalculated the data
2665 unnecessarily. In any case, I expanded the warning message to give more
2666 information.
2667
266815. Added the message "Restricted characters in address" to the statements in
2669 the default ACL that block characters like @ and % in local parts.
2670
267116. Change 71 for release 4.31 proved to be much less benign that I imagined.
2672 Three changes have been made:
2673
2674 (a) There was a serious bug; a negative response to MAIL caused the whole
2675 recipient domain to be cached as invalid, thereby blocking all messages
2676 to all local parts at the same domain, from all senders. This bug has
2677 been fixed. The domain is no longer cached after a negative response to
2678 MAIL if the sender used is not empty.
2679
2680 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2681 been restored.
2682
2683 (c) A new callout option, "use_sender" has been added for people who want
2684 the modified behaviour.
2685
2686
2687Exim version 4.31
2688-----------------
2689
2690 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2691 Larry Rosenman.
2692
2693 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2694 indeed breaks things for older releases.
2695
2696 3. Added additional logging to the case where there is a problem reading data
2697 from a filter that is running in a subprocess using a pipe, in order to
2698 try to track down a specific problem.
2699
2700 4. Testing facility fudge: when running in the test harness and attempting
2701 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2702 getting "No route to host". Convert this to a timeout.
2703
2704 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2705 warning.
2706
2707 6. Some OS don't have socklen_t but use size_t instead. This affects the
2708 fifth argument of getsockopt() amongst other things. This is now
2709 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2710 can be set for individual OS. I have set it for SunOS5, OSF1, and
2711 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2712 some earlier ones do not.
2713
2714 7. Change 4.30/15 was not doing the test caselessly.
2715
2716 8. The standard form for an IPv6 address literal was being rejected by address
2717 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2718 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2719 this, as well as the form without the "IPv6" on the front (but only when
2720 address literals are enabled, of course).
2721
2722 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2723
272410. Exim crashed if a message with an empty sender address specified by -f
2725 encountered a router with an errors_to setting. This could be provoked only
2726 by a command such as
2727
2728 exim -f "" ...
2729
2730 where an empty string was supplied; "<>" did not hit this bug.
2731
273211. Installed PCRE release 4.5.
2733
273412. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2735 remained set. It is now erased.
2736
273713. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2738 times from message ids (which are base 36 rather than the normal 62).
2739
274014. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2741 were being counted as actual protocol errors, and logged if the log
2742 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2743 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2744 and DATA following a set of rejected RCPTs do not count as protocol errors.
2745 In other words, Exim assumes they were pipelined, though this may not
2746 actually be the case. Of course, in all cases the client gets an
2747 appropriate error code.
2748
274915. If a lookup fails in an ACL condition, a message about the failure may
2750 be available; it is used if testing the ACL cannot continue, because most
2751 such messages specify what the cause of the deferral is. However, some
2752 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2753 that caused an old message to be retained and used if a later statement
2754 caused a defer, replacing the real cause of the deferral.
2755
275616. If an IP address had so many PTR records that the DNS lookup buffer
2757 was not large enough to hold them, Exim could crash while trying to process
2758 the truncated data. It now detects and logs this case.
2759
276017. Further to 4.21/58, another change has been made: if (and only if) the
2761 first line of a message (the first header line) ends with CRLF, a bare LF
2762 in a subsequent header line has a space inserted after it, so as not to
2763 terminate the header.
2764
276518. Refactoring: tidied an ugly bit of code in appendfile that copied data
2766 unnecessarily, used atoi() instead of strtol(), and didn't check the
2767 termination when getting file sizes from file names by regex.
2768
276919. Completely re-implemented the support for maildirsize files, in the light
2770 of a number of problems with the previous contributed implementation
2771 (4.30/29). In particular:
2772
2773 . If the quota is zero, the maildirsize file is maintained, but no quota is
2774 imposed.
2775
2776 . If the maildir directory does not exist, it is created before any attempt
2777 to write a maildirsize file.
2778
2779 . The quota value in the file is just a cache; if the quota is changed in
2780 the transport, the new value overrides.
2781
2782 . A regular expression is available for excluding directories from the
2783 count.
2784
278520. The autoreply transport checks the characters in options that define the
2786 message's headers; it allows continued headers, but it was checking with
2787 isspace() after an embedded newline instead of explicitly looking for a
2788 space or a tab.
2789
279021. If all the "regular" hosts to which an address was routed had passed their
2791 expiry times, and had not reached their retry times, the address was
2792 bounced, even if fallback hosts were defined. Now Exim should go on to try
2793 the fallback hosts.
2794
279522. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2796 equivalent code in the SMTP transport. Some hosts send humungous responses
2797 to HELO/EHLO, more than 1024 it seems.
2798
279923. Refactoring: code in filter.c used (void *) for "any old type" but this
2800 gives compiler warnings in some environments. I've now done it "properly",
2801 using a union.
2802
280324. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2804 (because of problems with the built-in one) was declared to return uschar *
2805 instead of char *, causing compiler failure.
2806
280725. Fixed a file descriptor leak when processing alias/forward files.
2808
280926. Fixed a minor format string issue in dbfn.c.
2810
281127. Typo in exim.c: ("dmbnz" for "dbmnz").
2812
281328. If a filter file refered to $h_xxx or $message_headers, and the headers
2814 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2815 become corrupted.
2816
281729. When a sender address is verified, it is cached, to save repeating the test
2818 when there is more than one recipient in a message. However, when the
2819 verification involves a callout, it is possible for different callout
2820 options to be set for different recipients. It is too complicated to keep
2821 track of this in the cache, so now Exim always runs a verification when a
2822 callout is required, relying on the callout cache for the optimization.
2823 The overhead is duplication of the address routing, but this should not be
2824 too great.
2825
282630. Fixed a bug in callout caching. If a RCPT command caused the sender address
2827 to be verified with callout=postmaster, and the main callout worked but the
2828 postmaster check failed, the verification correctly failed. However, if a
2829 subsequent RCPT command asked for sender verification *without* the
2830 postmaster check, incorrect caching caused this verification also to fail,
2831 incorrectly.
2832
283331. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2834 it was not caching the DNS options (qualify_single, search_parents) that
2835 were used when the lookup failed. A subsequent lookup with different
2836 options therefore always gave the same answer, though there were cases
2837 where it should not have. (Example: a "domains = !$mx_any" option on a
2838 dnslookup router: the "domains" option is always processed without any
2839 widening, but the router might have qualify_single set.) Now Exim uses the
2840 cached value only when the same options are set.
2841
284232. Added John Jetmore's "exipick" utility to the distribution.
2843
284433. GnuTLS: When an attempt to start a TLS session fails for any reason other
2845 than a timeout (e.g. a certificate is required, and is not provided), an
2846 Exim server now closes the connection immediately. Previously it waited for
2847 the client to close - but if the client is SSL, it seems that they each
2848 wait for each other, leading to a delay before one of them times out.
2849
285034: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2851 maintained 0.8.x compatibility because I don't think many are using it, and
2852 it is clearly obsolete.
2853
285435. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2855 transport.
2856
285736. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2858 client certificate was expired. A simple patch fixes this, though I don't
2859 understand the full logic of why the verify callback is called multiple
2860 times.
2861
286237. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2863 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2864 which causes problems with some clients (such as the Certicom SSL Plus
2865 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2866 disables the coutermeasure allowing Eudora to connect."
2867
286838. Exim was not checking that a write() to a log file succeeded. This could
2869 lead to Bad Things if a log got too big, in particular if it hit a file
2870 size limit. Exim now panics and dies if it cannot write to a log file, just
2871 as it does if it cannot open a log file.
2872
287339. Modified OS/Makefile-Linux so that it now contains
2874
2875 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2876
2877 The two -D definitions ensure that Exim is compiled with large file
2878 support, which makes it possible to handle log files that are bigger than
2879 2^31.
2880
288140. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2882 instance) a domain was checked against a named list that involved a lookup,
2883 causing $domain_data to be set, then another domain was checked against the
2884 same list, then the first domain was re-checked, the value of $domain_data
2885 after the final check could be wrong. In particular, if the second check
2886 failed, it could be set empty. This bug probably also applied to
2887 $localpart_data.
2888
288941. The strip_trailing_dot option was not being applied to the address given
2890 with the -f command-line option.
2891
289242. The code for reading a message's header from the spool was incrementing
2893 $received_count, but never initializing it. This meant that the value was
2894 incorrect (doubled) while delivering a message in the same process in which
2895 it was received. In the most common configuration of Exim, this never
2896 happens - a fresh exec is done - but it can happen when
2897 deliver_drop_privilege is set.
2898
289943. When Exim logs an SMTP synchronization error - client data sent too soon -
2900 it now includes up to 150 characters of the unexpected data in the log
2901 line.
2902
290344. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2904 and building data strings. The size of both of these buffers was 10 000
2905 bytes - far larger than anybody would *ever* want, thought I. Needless to
2906 say, somebody hit the limit. I have increased the maximum line length to
2907 20 000 and the maximum data length of concatenated lines to 100 000. I have
2908 also fixed two bugs, because there was no checking on these buffers. Tsk,
2909 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2910 buffer is too small.
2911
291245. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2913 lsearch lookups. Now it does.
2914
291546. When parsing a route_list item in a manualroute router, a fixed-length
2916 buffer was used for the list of hosts. I made this 1024 bytes long,
2917 thinking that nobody would ever have a list of hosts that long. Wrong.
2918 Somebody had a whole pile of complicated expansion conditions, and the
2919 string was silently truncated, leading to an expansion error. It turns out
2920 that it is easier to change to an unlimited length (owing to other changes
2921 that have happened since this code was originally written) than to build
2922 structure for giving a limitation error. The length of the item that
2923 expands into the list of hosts is now unlimited.
2924
292547. The lsearch lookup could not handle data where the length of text line was
2926 more than 4095 characters. Such lines were truncated, leading to shortened
2927 data being returned. It should now handle lines of any length.
2928
292948. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2930 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2931 ACL").
2932
293349. Cosmetic tidy to scripts like exicyclog that are generated by globally
2934 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2935 no longer happens in comment lines. A list of replacements is now placed
2936 at the head of all of the source files, except those whose only change is
2937 to replace PERL_COMMAND in the very first #! line.
2938
293950. Replaced the slow insertion sort in queue.c, for sorting the list of
2940 messages on the queue, with a bottom-up merge sort, using code contributed
2941 by Michael Haardt. This should make operations like -bp somewhat faster on
2942 large queues. It won't affect queue runners, except when queue_run_in_order
2943 is set.
2944
294551. Installed eximstats 1.31 in the distribution.
2946
294752. Added support for SRV lookups to the dnslookup router.
2948
294953. If an ACL referred to $message_body or $message_body_end, the value was not
2950 reset for any messages that followed in the same SMTP session.
2951
295254. The store-handling optimization for building very long strings was not
2953 differentiating between the different store pools. I don't think this
2954 actually made any difference in practice, but I've tidied it.
2955
295655. While running the routers to verify a sender address, $sender_address
2957 was still set to the sender address. This is wrong, because when routing to
2958 send a bounce to the sender, it would be empty. Therefore, I have changed
2959 it so that, while verifying a sender address, $sender_address is set to <>.
2960 (There is no change to what happens when verifying a recipient address.)
2961
296256. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2963 target A or AAAA records (if not already returned) without resetting the
2964 qualify_single or search_parents options of the DNS resolver. These are
2965 inappropriate in this case because the targets of MX and SRV records must
2966 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2967 target that, when qualified, matched something in the local domain. These
2968 two options are now turned off when doing these lookups.
2969
297057. It seems that at least some releases of Reiserfs (which does not have the
2971 concept of a fixed number of inodes) returns zero and not -1 for the
2972 number of available inodes. This interacted badly with check_spool_inodes,
2973 which assumed that -1 was the "no such thing" setting. What I have done is
2974 to check that the total number of inodes is greater than zero before doing
2975 the test of how many are available.
2976
297758. When a "warn" ACL statement has a log_message modifier, the message is
2978 remembered, and not repeated. This is to avoid a lot of repetition when a
2979 message has many recipients that cause the same warning to be written.
2980 Howewer, Exim was preserving the list of already written lines for an
2981 entire SMTP session, which doesn't seem right. The memory is now reset if a
2982 new message is started.
2983
298459. The "rewrite" debugging flag was not showing the result of rewriting in the
2985 debugging output unless log_rewrite was also set.
2986
298760. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2988 of (int)(handle) when we know that handle contains (void *)(-1).
2989
299061. The Exim daemon panic-logs an error return when it closes the incoming
2991 connection. However "connection reset by peer" seems to be common, and
2992 isn't really an error worthy of noting specially, so that particular error
2993 is no long logged.
2994
299562. When Exim is trying to find all the local interfaces, it used to panic and
2996 die if the ioctl to get the interface flags failed. However, it seems that
2997 on at least one OS (Solaris 9) it is possible to have an interface that is
2998 included in the list of interfaces, but for which you get a failure error
2999 for this call. This happens when the interface is not "plumbed" into a
3000 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3001 failure of the "get flags" call assumes that the interface is down.
3002
300363. Added a ${eval10: operator, which assumes all numbers are decimal. This
3004 makes life easier for people who are doing arithmetic on fields extracted
3005 from dates, where you often get leading zeros that should not be
3006 interpreted as octal.
3007
300864. Added qualify_domain to the redirect router, to override the global
3009 setting.
3010
301165. If a pathologically long header line contained very many addresses (the
3012 report of this problem mentioned 10 000) and each of them was rewritten,
3013 Exim could use up a very large amount of memory. (It kept on making new
3014 copies of the header line as it rewrote, and never released the old ones.)
3015 At the expense of a bit more processing, the header rewriting function has
3016 been changed so that it no longer eats memory in this way.
3017
301866. The generation of the Received: header has been moved from the time that a
3019 message starts to be received, to the time that it finishes. The timestamp
3020 in the Received: header should now be very close to that of the <= log
3021 line. There are two side-effects of this change:
3022
3023 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3024 logged header lines no longer include the local Received: line, because
3025 it has not yet been created. The same applies to a copy of the message
3026 that is returned to a non-SMTP sender when a message is rejected.
3027
3028 (b) When a filter file is tested using -bf, no additional Received: header
3029 is added to the test message. After some thought, I decided that this
3030 is a bug fix.
3031
3032 This change does not affect the value of $received_for. It is still set
3033 after address rewriting, but before local_scan() is called.
3034
303567. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3036
303768. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3038 gave an unhelpful panic error message, and a defer error. I have managed to
3039 change this behaviour so that it now rejects any supplied certificate,
3040 which seems right, as the list of acceptable certificates is empty.
3041
304269. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3043 gave an unhelpful defer error. I have not managed to make this reject any
3044 supplied certificates, but the error message it gives is "no certificate
3045 supplied", which is not helpful.
3046
304770. exigrep's output now also includes lines that are not associated with any
3048 message, but which match the given pattern. Implemented by a patch from
3049 Martin Sluka, which also tidied up the Perl a bit.
3050
305171. Recipient callout verification, like sender verification, was using <> in
3052 the MAIL FROM command. This isn't really the right thing, since the actual
3053 sender may affect whether the remote host accepts the recipient or not. I
3054 have changed it to use the actual sender in the callout; this means that
3055 the cache record is now keyed on a recipient/sender pair, not just the
3056 recipient address. There doesn't seem to be a real danger of callout loops,
3057 since a callout by the remote host to check the sender would use <>.
3058 [SEE ABOVE: changed after hitting problems.]
3059
306072. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3061 temporary errors. However, in the case of such a code being given after
3062 the end of a data transmission (i.e. after ".") Exim was failing to write
3063 a retry record for the message. (Yes, there was some broken host that was
3064 actually sending 8xx at this point.)
3065
306673. An unknown lookup type in a host list could cause Exim to panic-die when
3067 the list was checked. (An example that provoked this was putting <; in the
3068 middle of a list instead of at the start.) If this happened during a DATA
3069 ACL check, a -D file could be left lying around. This kind of configuration
3070 error no longer causes Exim to die; instead it causes a defer errror. The
3071 incident is still logged to the main and panic logs.
3072
307374. Buglet left over from Exim 3 conversion. The message "too many messages
3074 in one connection" was written to the rejectlog but not the mainlog, except
3075 when address rewriting (yes!) was being logged.
3076
307775. Added write_rejectlog option.
3078
307976. When a system filter was run not as root (that is, when system_filter_user
3080 was set), the values of the $n variables were not being returned to the
3081 main process; thus, they were not subsequently available in the $sn
3082 variables.
3083
308477. Added +return_path_on_delivery log selector.
3085
308678. A connection timeout was being treated differently from recipients deferred
3087 when testing hosts_max_try with a message that was older than the host's
3088 retry timeout. (The host should not be counted, thus allowing all hosts to
3089 be tried at least once before bouncing.) This may have been the cause of an
3090 occasionally reported bug whereby a message would remain on the queue
3091 longer than the retry timeout, but would be bounced if a delivery was
3092 forced. I say "may" because I never totally pinned down the problem;
3093 setting up timeout/retry tests is difficult. See also the next item.
3094
309579. The ultimate address timeout was not being applied to errors that involved
3096 a combination of host plus message (for example, a timeout on a MAIL
3097 command). When an address resolved to a number of possible hosts, and they
3098 were not all tried for each delivery (e.g. because of hosts_max_try), a
3099 message could remain on the queue longer than the retry timeout.
3100
310180. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3102 Haardt.
3103
310481. Fixed an obscure SMTP outgoing bug which required at least the following
3105 conditions: (a) there was another message waiting for the same server;
3106 (b) the server returned 5xx to all RCPT commands in the first message so
3107 that the message was not completed; (c) the server dropped the connection
3108 or gave a negative response to the RSET that Exim sends to abort the
3109 transaction. The observed case was a dropped connection after DATA that had
3110 been sent in pipelining mode. That is, the server had advertised PIPELINING
3111 but was not implementing it correctly. The effect of the bug was incorrect
3112 behaviour, such as trying another host, and this could lead to a crash.
3113
3114
3115Exim version 4.30
3116-----------------
3117
3118 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3119 and daemon.c were passed as pointers to ints; they should have been
3120 pointers to socklen_t variables (which are typically unsigned ints).
3121
3122 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3123 fixed.
3124
3125 3. Fixed a really odd bug that affected only the testing scheme; patching a
3126 certain fixed string in the binary changed the value of another string that
3127 happened to be identical to the end of the original first string.
3128
3129 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3130 name", it returns that address as the IP address. On some operating
3131 systems (e.g. Solaris), it also passes back the IP address string as the
3132 "host name". However, on others (e.g. Linux), it passes back an empty
3133 string. Exim wasn't checking for this, and was changing the host name to an
3134 empty string, assuming it had been canonicized.
3135
3136 5. Although rare, it is permitted to have more than one PTR record for a given
3137 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3138 all the names associated with an address, because they do in Solaris.
3139 However, it seems that they do not in Linux for data that comes from the
3140 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3141 I found this out when I moved to a new Linux workstation and tried to run
3142 the Exim test suite.
3143
3144 To get round this problem I have changed the code so that it now does its
3145 own call to the DNS to look up PTR records when searching for a host name.
3146 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3147 addresses that are only in /etc/hosts are still found.
3148
3149 This behaviour is, however, controlled by an option called host_lookup_
3150 order, which defaults to "bydns:byaddr". If people want to use the other
3151 order, or indeed, just use one or the other means of lookup, they can
3152 specify it in this variable.
3153
3154 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3155 some operating systems, this comes back from gethostbyaddr() as an empty
3156 string, and this is what Exim used to test for. However, it seems that in
3157 other systems, "." is yielded. Exim now tests for this case too.
3158
3159 7. The values of check_spool_space and check_log_space are now held internally
3160 as a number of kilobytes instead of an absolute number of bytes. If a
3161 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3162 kilobyte. This means that much larger values can be stored.
3163
3164 8. Exim monitor: an attempt to get the action menu when not actually pointing
3165 at a message produces an empty menu entitled "No message selected". This
3166 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3167 no entries in it ("Shell widget menu has zero width and/or height"). So I
3168 have added a single, blank menu entry in this case.
3169
3170 9. Added ${quote_local_part.
3171
317210. MIME decoding is now applied to the contents of Subject: header lines when
3173 they are logged.
3174
317511. Now that a reference to $sender_host_address automatically causes a reverse
3176 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3177 host lookup before query-style lookups in lists that might use this
3178 variable. This has therefore been abolished, and the "net-" prefix is no
3179 longer necessary for query-style lookups.
3180
318112. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3182 have been a typo for LFLAGS, so it has been changed.
3183
318413. The install script calls Exim with "-C /dev/null" in order to find the
3185 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3186 to be output. Howeve, since Exim outputs its version number before the
3187 error, it didn't break the script. It just looked ugly. I fixed this by
3188 always allowing "-C /dev/null" if the caller is root.
3189
319014. Ignore overlarge ACL variable number when reading spool file - insurance
3191 against a later release with more variables having written the file.
3192
319315. The standard form for an IPv6 address literal was being rejected by EHLO.
3194 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3195 this, as well as the form without the "IPv6" on the front.
3196
319716. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3198 OS/Makefile-Darwin file.
3199
320017. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3201 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3202
320318. After change 4.21/52, "%ld" was used to format the contents of the $inode
3204 variable. However, some OS use ints for inodes. I've added cast to long int
3205 to get rid of the compiler warning.
3206
320719. I had forgotten to lock out "/../" in configuration file names when
3208 ALT_CONFIG_PREFIX was set.
3209
321020. Routers used for verification do not need to specify transports. However,
3211 if such a router generated a host list, and callout was configured, Exim
3212 crashed, because it could not find a port number from the (non-existent)
3213 transport. It now assumes port 25 in this circumstance.
3214
321521. Added the -t option to exigrep.
3216
321722. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3218 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3219 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3220 them is set, LOOKUP_LSEARCH is forced.
3221
322223. "exim -bV" now outputs a list of lookups that are included in the binary.
3223
322424. Added sender and host information to the "rejected by local_scan()" log
3225 line; previously there was no indication of these.
3226
322725. Added .include_if_exists.
3228
322926. Change 3.952/11 added an explicit directory sync on top of a file sync for
3230 Linux. It turns out that not all file systems support this. Apparently some
3231 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3232 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3233 not supported on the file descriptor, is now ignored when Exim is trying to
3234 sync a directory. This applies only to Linux.
3235
323627. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3237
323828. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3239 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3240 this.
3241
324229. Added support for maildirsize files from supplied patch (modified a bit).
3243
324430. The use of :fail: followed by an empty string could lead Exim to respond to
3245 sender verification failures with (e.g.):
3246
3247 550 Verification failed for <xxx>
3248 550 Sender verify failed
3249
3250 where the first response line was missing the '-' that indicates it is not
3251 the final line of the response.
3252
325331. The loop for finding the name of the user that called Exim had a hardwired
3254 limit of 10; it now uses the value of finduser_retries, which is used for
3255 all other user lookups.
3256
325732. Added $received_count variable, available in data and not_smtp ACLs, and at
3258 delivery time.
3259
326033. Exim was neglecting to zero errno before one call of strtol() when
3261 expanding a string and expecting an integer value. On some systems this
3262 resulted in spurious "integer overflow" errors. Also, it was casting the
3263 result into an int without checking.
3264
326534. Testing for a connection timeout using "timeout_connect" in the retry rules
3266 did not work. The code looks as if it has *never* worked, though it appears
3267 to have been documented since at least releast 1.62. I have made it work.
3268
326935. The "timeout_DNS" error in retry rules, also documented since at least
3270 1.62, also never worked. As it isn't clear exactly what this means, and
3271 clearly it isn't a major issue, I have abolished the feature by treating it
3272 as "timeout", and writing a warning to the main and panic logs.
3273
327436. The display of retry rules for -brt wasn't always showing the error code
3275 correctly.
3276
327737. Added new error conditions to retry rules: timeout_A, timeout_MX,
3278 timeout_connect_A, timeout_connect_MX.
3279
328038. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3281 to the empty sender.
3282
328339. The daemon was not analysing the content of -oX till after it had closed
3284 stderr and disconnected from the controlling terminal. This meant that any
3285 syntax errors were only noted on the panic log, and the return code from
3286 the command was 0. By re-arranging the code a little, I've made the
3287 decoding happen first, so such errors now appear on stderr, and the return
3288 code is 1. However, the actual setting up of the sockets still happens in
3289 the disconnected process, so errors there are still only recorded on the
3290 panic log.
3291
329240. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3293 connections (as happens on some IP stacks) was logged at start up time as
3294 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3295 it from "IPv6 and IPv4", which means that two separate sockets are being
3296 used.
3297
329841. The debug output for gethostbyname2() or getipnodebyname() failures now
3299 says whether AF_INET or AF_INET6 was passed as an argument.
3300
330142. Exiwhat output was messed up when time zones were included in log
3302 timestamps.
3303
330443. Exiwhat now gives more information about the daemon's listening ports,
3305 and whether -tls-on-connect was used.
3306
330744. The "port" option of the smtp transport is now expanded.
3308
330945. A "message" modifier in a "warn" statement in a non-message ACL was being
3310 silently ignored. Now an error message is written to the main and panic
3311 logs.
3312
331346. There's a new ACL modifier called "logwrite" which writes to a log file
3314 as soon as it is encountered.
3315
331647. Added $local_user_uid and $local_user_gid at routing time.
3317
331848. Exim crashed when trying to verify a sender address that was being
3319 rewritten to "<>".
3320
332149. Exim was recognizing only a space character after ".include". It now also
3322 recognizes a tab character.
3323
332450. Fixed several bugs in the Perl script that creates the exim.8 man page by
3325 extracting the relevant information from the specification. The man page no
3326 longer contains scrambled data for the -d option, and I've added a section
3327 at the front about calling Exim under different names.
3328
332951. Added "extra_headers" argument to the "mail" command in filter files.
3330
333152. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3332 crash.
3333
333453. Installed eximstats 1.29.
3335
333654. Added transport_filter_timeout as a generic transport option.
3337
333855. Exim no longer adds an empty Bcc: header to messages that have no To: or
3339 Cc: header lines. This was required by RFC 822, but it not required by RFC
3340 2822.
3341
334256. Exim used to add From:, Date:, and Message-Id: header lines to any
3343 incoming messages that did not have them. Now it does so only if the
3344 message originates locally, that is, if there is no associated remote host
3345 address. When Resent- header lines are present, this applies to the Resent-
3346 lines rather than the non-Resent- lines.
3347
334857. Drop incoming SMTP connection after too many syntax or protocol errors. The
3349 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3350
335158. Messages for configuration errors now include the name of the main
3352 configuration file - useful now that there may be more than one file in a
3353 list (.included file names were always shown).
3354
335559. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3356 for those rare installations that do not start the daemon as root or run it
3357 setuid root. I've cut out the call to initgroups() if the daemon is not
3358 root at that time.
3359
336060. The Exim user and group can now be bound into the binary as text strings
3361 that are looked up at the start of Exim's processing.
3362
336361. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3364
336562. Added $mailstore_basename variable.
3366
336763. Installed patch to sieve.c from Michael Haardt.
3368
336964. When Exim failed to open the panic log after failing to open the main log,
3370 the original message it was trying to log was written to stderr and debug
3371 output, but if they were not available (the usual case in production), it
3372 was lost. Now it is written to syslog before the two lines that record the
3373 failures to open the logs.
3374
337565. Users' Exim filters run in subprocesses under the user's uid. It is
3376 possible for a "deliver" command or an alias in a "personal" command to
3377 provoke an address rewrite. If logging of address rewriting is configured,
3378 this fails because the process is not running as root or exim. There may be
3379 a better way of dealing with this, but for the moment (because 4.30 needs
3380 to be released), I have disabled address rewrite logging when running a
3381 filter in a non-root, non-exim process.
3382
3383
3384Exim version 4.24
3385-----------------
3386
3387 1. The buildconfig auxiliary program wasn't quoting the value set for
3388 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3389 not defined. This bug was masked in 4.22 by the effect that was fixed in
3390 change 4.23/1.
3391
3392 2. Some messages that were rejected after a message id was allocated were
3393 shown as "incomplete" by exigrep. It no longer does this for messages that
3394 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3395
3396 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3397 have allow_domain_literals set, the ID did not get logged in the <= line.
3398 Domain literals are now always recognized in Message-ID: header lines.
3399
3400 4. The first argument for a ${extract expansion item is the key name or field
3401 number. Leading and trailing spaces in this item were not being ignored,
3402 causing some misleading effects.
3403
3404 5. When deliver_drop_privilege was set, single queue runner processes started
3405 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3406 same command in the process it spins off) were not dropping privilege.
3407
3408 6. When the daemon running as "exim" started a queue runner, it always
3409 re-executed Exim in the spun-off process. This is a waste of effort when
3410 deliver_drop_privilege is set. The new process now just calls the
3411 queue-runner function directly.
3412
3413
3414Exim version 4.23
3415-----------------
3416
3417 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3418 HEADERS_CHARSET.
3419
3420 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3421 ignored. Though the use of -oP was forcing the writing of a pid file, it
3422 was always written to the default place.
3423
3424 3. If the message "no IP address found for host xxxx" is generated during
3425 incoming verification, it is now followed by identification of the incoming
3426 connection (so you can more easily find what provoked it).
3427
3428 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3429
3430 5. Added some features to "harden" Exim a bit more against certain attacks:
3431
3432 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3433 be put in Local/Makefile. This is like the never_users runtime option,
3434 but it cannot be overridden. The default setting is "root".
3435
3436 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3437 prefix string with which any file named in a -C command line option
3438 must start.
3439
3440 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3441 is retained for -C and -D only if the caller of Exim is root. Without
3442 it, the exim user may also use -C and -D and retain privilege.
3443
3444 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3445 command line option is disabled.
3446
3447 6. Macro names set by the -D option must start with an upper case letter, just
3448 like macro names defined in the configuration file.
3449
3450 7. Added "dereference=" facility to LDAP.
3451
3452 8. Two instances of the typo "uknown" in the source files are fixed.
3453
3454 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3455 the Configure-Makefile script screwed up while processing it.
3456
345710. Incorporated PCRE 4.4.
3458
345911. The SMTP synchronization check was not operating right at the start of an
3460 SMTP session. For example, it could not catch a HELO sent before the client
3461 waited for the greeting. There is now a check for outstanding input at the
3462 point when the greeting is written. Because of the duplex, asynchronous
3463 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3464 way, but not yet received, when the check is performed.
3465
346612. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3467 on TCP/IP sockets, because this apparently causes some broken clients to
3468 timeout.
3469
347013. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3471 unchanged) from the Cygwin maintainer.
3472
347314. The code for -bV that shows what is in the binary showed "mbx" when maildir
3474 was supported instead of testing for mbx. Effectively a typo.
3475
347615. The spa authenticator server code was not checking that the input it
3477 received was valid base64.
3478
347916. The debug output line for the "set" modifier in ACLs was not showing the
3480 name of the variable that was being set.
3481
348217. Code tidy: the variable type "vtype_string" was never used. Removed it.
3483
348418. Previously, a reference to $sender_host_name did not cause a DNS reverse
3485 lookup on its own. Something else was needed to trigger the lookup. For
3486 example, a match in host_lookup or the need for a host name in a host list.
3487 Now, if $sender_host_name is referenced and the host name has not yet been
3488 looked up, a lookup is performed. If the lookup fails, the variable remains
3489 empty, and $host_lookup_failed is set to "1".
3490
349119. Added "eqi" as a case-independent comparison operator.
3492
349320. The saslauthd authentication condition could segfault if neither service
3494 nor realm was specified.
3495
349621. If an overflowing value such as "2048M" was set for message_size_limit, the
3497 error message that was logged was misleading, and incoming SMTP
3498 connections were dropped. The message is now more accurate, and temporary
3499 errors are given to SMTP connections.
3500
350122. In some error situations (such as 21 above) Exim rejects all SMTP commands
3502 (except RSET) with a 421 error, until QUIT is received. However, it was
3503 failing to send a response to QUIT.
3504
350523. The HELO ACL was being run before the code for helo_try_verify_hosts,
3506 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3507 ACL is now run after the helo_try_verify_hosts code.
3508
350924. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3510 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3511 case-independent, so other case variants are also recognized). Apparently
3512 some systems use these upper case variants.
3513
351425. If more than two messages were waiting for the same host, and a transport
3515 filter was specified for the transport, Exim sent two messages over the
3516 same TCP/IP connection, and then failed with "socket operation on non-
3517 socket" when it tried to send the third.
3518
351926. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3520
352127. The extern definition of crypt16() in expand.c was not being excluded when
3522 the OS had its own crypt16() function.
3523
352428. Added bounce_return_body as a new option, and bounce_return_size_limit
3525 as a preferred synonym for return_size_limit, both as an option and as an
3526 expansion variable.
3527
352829. Added LIBS=-liconv to OS/Makefile-OSF1.
3529
353030. Changed the default configuration ACL to relax the local part checking rule
3531 for addresses that are not in any local domains. For these addresses,
3532 slashes and pipe symbols are allowed within local parts, but the sequence
3533 /../ is explicitly forbidden.
3534
353531. SPA server authentication was not clearing the challenge buffer before
3536 using it.
3537
353832. log_message in a "warn" ACL statement was writing to the reject log as
3539 well as to the main log, which contradicts the documentation and doesn't
3540 seem right (because no rejection is happening). So I have stopped it.
3541
354233. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3543 However, I am unable to do any testing of this.
3544
354534. Fixed an infelicity in the appendfile transport. When checking directories
3546 for a mailbox, to see if any needed to be created, it was accidentally
3547 using path names with one or more superfluous leading slashes; tracing
3548 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3549
355035. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3551 contents are added to the log line that is written for every discarded
3552 recipient. (Previously a log_message setting was ignored.)
3553
355436. The ${quote: operator now quotes the string if it is empty.
3555
355637. The install script runs exim in order to find its version number. If for
3557 some reason other than non-existence or emptiness, which it checks, it
3558 could not run './exim', it was installing it with an empty version number,
3559 i.e. as "exim-". This error state is now caught, and the installation is
3560 aborted.
3561
356238. An argument was missing from the function that creates an error message
3563 when Exim fails to connect to the socket for saslauthd authentication.
3564 This could cause Exim to crash, or give a corrupted message.
3565
356639. Added isip, isip4, and isip6 to ${if conditions.
3567
356840. The ACL variables $acl_xx are now saved with the message, and can be
3569 accessed later in routers, transports, and filters.
3570
357141. The new lookup type nwildlsearch is like wildlsearch, except that the key
3572 strings in the file are not string-expanded.
3573
357442. If a MAIL command specified a SIZE value that was too large to fit into an
3575 int variable, the check against message_size_limit failed. Such values are
3576 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3577 day this will have to be increased, but I don't think I want to be around
3578 when emails are that large.
3579
3580
3581
3582Exim version 4.22
3583-----------------
3584
3585 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3586 iconv() is not standard in FreeBSD.
3587
3588 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3589 IPv6 enabled. The observed symptom was a segmentation fault on return from
3590 the function os_common_find_running_interfaces() in src/os.c.
3591
3592 3. In the check_special_case() function in daemon.c I had used "errno" as an
3593 argument name, which causes warnings on some systems. This was basically a
3594 typo, since it was named "eno" in the comments!
3595
3596 4. The code that waits for the clock to tick (at a resolution of some fraction
3597 of a second) so as to ensure message-id uniqueness was always waiting for
3598 at least one whole tick, when it could have waited for less. [This is
3599 almost certainly not relevant at current processor speeds, where it is
3600 unlikely to ever wait at all. But we try to future-proof.]
3601
3602 5. The function that sleeps for a time interval that includes fractions of a
3603 second contained a race. It did not block SIGALRM between setting the
3604 timer, and suspending (a couple of lines later). If the interval was short
3605 and the sigsuspend() was delayed until after it had expired, the suspension
3606 never ended. On busy systems this could lead to processes getting stuck for
3607 ever.
3608
3609 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3610 process, before it forks any delivery processes. The open lookup caching
3611 mechanism meant that the open file or database connection was passed into
3612 the delivery process. The problem was that delivery processes always tidy
3613 up cached lookup data. This could cause a problem for the next delivery
3614 process started by the queue runner, because the external queue runner
3615 process does not know about the closure. So the next delivery process
3616 still has data in the lookup cache. In the case of a file lookup, there was
3617 no problem because closing a file descriptor in a subprocess doesn't affect
3618 the parent. However, if the lookup was caching a connection to a database,
3619 the connection was closed, and the second delivery process was likely to
3620 see errors such as "PGSQL: query failed: server closed the connection
3621 unexpectedly". The problem has been fixed by closing all cached lookups
3622 in a queue runner before running a delivery process.
3623
3624 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3625 seem to have the "const" qualifier which it has on other OS. I've
3626 parameterised it.
3627
3628 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3629 *of the same type* (client or server) with the same public name that an
3630 error should be diagnosed.
3631
3632 9. When Exim looked up a host name for an IP address, but failed to find the
3633 original IP address when looking up the host name (a safety check), it
3634 output the message "<ip address> does not match any IP for NULL", which was
3635 confusing, to say the least. The bug was that the host name should have
3636 appeared instead of "NULL".
3637
363810. Since release 3.03, if Exim is called by a uid other than root or the Exim
3639 user that is built into the binary, and the -C or -D options is used, root
3640 privilege is dropped before the configuration file is read. In addition,
3641 logging is switched to stderr instead of the normal log files. If the
3642 configuration then re-defines the Exim user, the unprivileged environment
3643 is probably not what is expected, so Exim logs a panic warning message (but
3644 proceeds).
3645
3646 However, if deliver_drop_privilege is set, the unprivileged state may well
3647 be exactly what is intended, so the warning has been cut out in that case,
3648 and Exim is allowed to try to