Add a check for Auto-Submitted to the default for
[exim.git] / doc / doc-txt / ChangeLog
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5dff5817 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.374 2006/07/13 14:46:05 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
c816d124
PH
73PH/10 Added more information to debugging output for retry time not reached.
74
a9ccd69a
PH
75PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
76 operations in malware.c.
77
75fa1910
PH
78PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
79 signatures.
80
a7d7aa58
PH
81PH/13 If write_rejectlog was set false when logging was sent to syslog with
82 syslog_duplication set false, log lines that would normally be written
83 both the the main log and to the reject log were not written to syslog at
84 all.
85
42119b09
PH
86PH/14 In the default configuration, change the use of "message" in ACL warn
87 statements to "add_header".
88
41609df5
PH
89PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
90 not followed by a command (e.g. "seen endif").
91
a5bd321b
PH
92PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
93 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
94 latter.
95
5dff5817
PH
96PH/17 Added an extra condition to the default value of delay_warning_condition
97 so that it is now:
98
99 ${if or {
100 { match{$h_precedence:}{(?i)bulk|list|junk} }
101 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }
102 }{no}{yes}}
103
104 The Auto-Submitted: header is standardised, whereas I don't think
105 Precedence: ever was.
106
c59f5781 107
c887c79e
TF
108Exim version 4.62
109-----------------
110
111TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
112 other effects) broke the use of negated acl sub-conditions.
113
1cce3af8
PH
114PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
115 patch).
116
afb3eaaf
PH
117PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
118 "Deny" causes Exim to reject the incoming connection with a 554 error.
119 Unfortunately, if there is a major crisis, such as a disk failure,
120 tcp-wrappers gives "deny", whereas what one would like would be some
121 kind of temporary error. A kludge has been added to help with this.
122 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
123 554 error is used if errno is still zero or contains ENOENT (which occurs
124 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
125 451 error is used.
126
e173618b
PH
127PH/03 Add -lutil to the default FreeBSD LIBS setting.
128
dd16e114
PH
129PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
130 errors. Otherwise a message that provokes a temporary error (when other
131 messages do not) can cause a whole host to time out.
132
f7fd3850
PH
133PH/05 Batch deliveries by appendfile and pipe transports did not work when the
134 addresses were routed directly to files or pipes from a redirect router.
135 File deliveries just didn't batch; pipe deliveries might have suffered
136 odd errors.
137
d87df92c
PH
138PH/06 A failure to get a lock for a hints database would erroneously always say
139 "Failed to get write lock", even when it was really a read lock.
140
7e9f683d
PH
141PH/07 The appendfile transport was creating MBX lock files with a fixed mode
142 of 0600. This has been changed to use the value of the lockfile_mode
143 option (which defaults to 0600).
144
bfad5236
PH
145PH/08 Applied small patch from the Sieve maintainer.
146
01c490df
PH
147PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
148 folder from quota calculations, a direct delivery into this folder messed
149 up the contents of the maildirsize file. This was because the regex was
150 used only to exclude .Trash (or whatever) when the size of the mailbox
151 was calculated. There was no check that a delivery was happening into an
152 excluded directory. This bug has been fixed by ignoring all quota
153 processing for deliveries into excluded directories.
154
d6629cdc
PH
155PH/10 Added the maildirfolder_create_regex option to appendfile.
156
1cce3af8 157
214e2000
PH
158Exim version 4.61
159-----------------
160
161PH/01 The code for finding all the local interface addresses on a FreeBSD
162 system running IPv6 was broken. This may well have applied to all BSD
163 systems, as well as to others that have similar system calls. The broken
164 code found IPv4 interfaces correctly, but gave incorrect values for the
165 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
166 that it would not match correctly against @[] and not recognize the IPv6
167 addresses as local.
168
f9daeae0
PH
169PH/02 The ipliteral router was not recognizing addresses of the form user@
170 [ipv6:....] because it didn't know about the "ipv6:" prefix.
171
7e66e54d
PH
172PH/03 Added disable_ipv6.
173
c8ea1597
PH
174PH/04 Changed $reply_address to use the raw form of the headers instead of the
175 decoded form, because it is most often used to construct To: headers
176 lines in autoreplies, and the decoded form may well be syntactically
177 invalid. However, $reply_address has leading white space removed, and all
178 newlines turned into spaces so that the autoreply transport does not
179 grumble.
180
911f6fde
PH
181PH/05 If group was specified without a user on a router, and no group or user
182 was specified on a transport, the group from the router was ignored.
183
47ca6d6c
PH
184PH/06 Increased the number of ACL variables to 20 of each type, and arranged
185 for visible compile-time settings that can be used to change these
186 numbers, for those that want even more. Backwards compatibility with old
187 spool files has been maintained. However, going back to a previous Exim
188 release will lost any variables that are in spool files.
189
ed0e9820
PH
190PH/07 Two small changes when running in the test harness: increase delay when
191 passing a TCP/IP connection to a new process, in case the original
192 process has to generate a bounce, and remove special handling of
193 127.0.0.2 (sic), which is no longer necessary.
194
eff37e47
PH
195PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
196 be the same on different OS.
197
1921d2ea
PH
198PH/09 Moved a debug statement in filter processing to avoid a race problem when
199 testing.
200
b3f69ca8
JJ
201JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
202 whether --show-vars was specified or not
203
204JJ/02 exipick: Added support for new ACL variable spool format introduced
205 in 4.61-PH/06
206
424a1c63
PH
207PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
208 syntactically invalid From: or Reply-to: line, and a filter used this to
209 generate an autoreply, and therefore failed to obtain an address for the
210 autoreply, Exim could try to deliver to a non-existent relative file
211 name, causing unrelated and misleading errors. What now happens is that
212 it logs this as a hard delivery error, but does not attempt to create a
213 bounce message.
214
7a100415
PH
215PH/11 The exinext utility has a -C option for testing purposes, but although
216 the given file was scanned by exinext itself; it wasn't being passed on
217 when Exim was called.
218
19b9dc85
PH
219PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
220 an end-of-file indication when reading a command response.
221
309bd837
PH
222PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
223 compiled. In many other places in Exim, IPv6 addresses are always
224 recognized, so I have changed this. It also means that IPv4 domain
225 literals of the form [IPV4:n.n.n.n] are now always recognized.
226
59e82a2a
PH
227PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
228 used if the router is not running as root, for example, when verifying at
229 ACL time, or when using -bh. The debugging output from this situation was
230 non-existent - all you got was a failure to exec. I have made two
231 changes:
232
233 (a) Failures to set uid/gid, the current directory, or a process leader
234 in a subprocess such as that created by queryprogram now generate
235 suitable debugging ouput when -d is set.
236
237 (b) The queryprogram router detects when it is not running as root,
238 outputs suitable debugging information if -d is set, and then runs
239 the subprocess without attempting to change uid/gid.
240
9edc04ce
PH
241PH/15 Minor change to Makefile for building test_host (undocumented testing
242 feature).
243
1349e1e5
PH
244PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
245 additional section of a DNS packet that returns MX or SRV records.
246 Instead, it always explicitly searches for A/AAAA records. This avoids
247 major problems that occur when a DNS server includes only records of one
248 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
249 fixed another bug: if SRV records were looked up and the corresponding
250 address records were *not* found in the additional section, the port
251 values from the SRV records were lost.
252
ea49d0e1
PH
253PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
254 using the correct key (the original address) when searching the retry
255 rules in order to find which one to use for generating the retry hint.
256
064a94c9
PH
257PH/18 If quota_warn_message contains a From: header, Exim now refrains from
258 adding the default one. Similarly, if it contains a Reply-To: header, the
259 errors_reply_to option, if set, is not used.
260
727071f8
PH
261PH/19 When calculating a retry time, Exim used to measure the "time since
262 failure" by looking at the "first failed" field in the retry record. Now
263 it does not use this if it is later than than the arrival time of the
264 message. Instead it uses the arrival time. This makes for better
265 behaviour in cases where some deliveries succeed, thus re-setting the
266 "first failed" field. An example is a quota failure for a huge message
267 when small messages continue to be delivered. Without this change, the
268 "time since failure" will always be short, possible causing more frequent
269 delivery attempts for the huge message than are intended.
dd16e114 270 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 271
f78eb7c6
PH
272PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
273 $1, $2, $3) because the numerical variables can be reset during some
274 expansion items (e.g. "match"), thereby losing the authentication data.
275
21c28500
PH
276PH/21 Make -bV show the size of off_t variables so that the test suite can
277 decide whether to run tests for quotas > 2G.
278
279PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
280 mailbox_size, and mailbox_filecount in the appendfile transport. If a
281 filecount value is greater than 2G or if a quota value is greater than 2G
282 on a system where the size of off_t is not greater than 4, a panic error
283 is given.
284
1688f43b
PH
285PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
286 never match. The debug and -bh output now contains an explicit error
287 message indicating a malformed IPv4 address or mask.
288
289PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
290 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
291 PH/23 above applies.
292
9675b384
PH
293PH/25 Do not write to syslog when running in the test harness. The only
294 occasion when this arises is a failure to open the main or panic logs
295 (for which there is an explicit test).
296
6a3f1455
PH
297PH/26 Added the /no_tell option to "control=freeze".
298
dac79d3e
PH
299PH/27 If a host name lookup failed very early in a connection, for example, if
300 the IP address matched host_lookup and the reverse lookup yielded a name
301 that did not have a forward lookup, an error message of the form "no IP
302 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
303 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 304
5977a0b3
PH
305PH/28 An enabling patch from MH: add new function child_open_exim2() which
306 allows the sender and the authenticated sender to be set when
307 submitting a message from within Exim. Since child_open_exim() is
308 documented for local_scan(), the new function should be too.
309
c91535f3
PH
310PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
311 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
312 results in an empty string is now treated as unset.
313
0d46a8c8
PH
314PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
315
278c6e6c
PH
316PH/31 Added sender_verify_fail logging option.
317
2cbb4081
PH
318PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
319 needed by RFC 822 but not by RFC 2822 was commented out. I have now
320 tidied the source and removed it altogether.
321
3eef829e
PH
322PH/33 When a queue run was abandoned because the load average was too high, a
323 log line was always written; now it is written only if the queue_run log
324 selector is set. In addition, the log line for abandonment now contains
325 information about the queue run such as the pid. This is always present
326 in "start" and "stop" lines but was omitted from the "abandon" line.
327
1ab95fa6
PH
328PH/34 Omit spaces between a header name and the colon in the error message that
329 is given when verify = headers_syntax fails (if there are lots of them,
330 the message gets confusing).
331
230205fc
PH
332PH/35 Change the default for dns_check_names_pattern to allow slashes within
333 names, as there are now some PTR records that contain slashes. This check
334 is only to protect against broken name servers that fall over on strange
335 characters, so the fact that it applies to all lookups doesn't matter.
336
75e0e026
PH
337PH/36 Now that the new test suite is complete, we can remove some of the
338 special code in Exim that was needed for the old test suite. For example,
339 sorting DNS records because real resolvers return them in an arbitrary
340 order. The new test suite's fake resolver always returns records in the
341 same order.
342
343PH/37 When running in the test harness, use -odi for submitted messages (e.g.
344 bounces) except when queue_only is set, to avoid logging races between
345 the different processes.
346
145396a6
PH
347PH/38 Panic-die if .include specifies a non-absolute path.
348
3cd34f13
PH
349PH/39 A tweak to the "H" retry rule from its user.
350
11121d3d
JJ
351JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
352 a label. They prevented compilation on older perls.
353
354JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
355 a warning to be raised on newish perls.
356
357JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
358 on queue. Changes to match documented behaviour of showing count of
359 messages matching specified criteria.
360
8def5aaf
PH
361PH/40 Changed the default ident timeout from 30s to 5s.
362
929ba01c
PH
363PH/41 Added support for the use of login_cap features, on those BSD systems
364 that have them, for controlling the resources used by pipe deliveries.
365
2632889e
PH
366PH/42 The content-scanning code uses fopen() to create files in which to put
367 message data. Previously it was not paying any attention to the mode of
368 the files. Exim runs with umask(0) because the rest of the code creates
369 files with open(), and sets the required mode explicitly. Thus, these
370 files were ending up world-writeable. This was not a big issue, because,
371 being within the spool directory, they were not world-accessible. I have
372 created a function called modefopen, which takes an additional mode
373 argument. It sets umask(777), creates the file, chmods it to the required
374 mode, then resets the umask. All the relevant calls to fopen() in the
375 content scanning code have been changed to use this function.
376
944a9c55
PH
377PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
378 to 24 hours. This avoids potential overflow problems when processing G
379 and H retry rules. I suspect nobody ever tinkers with this value.
380
4a23603b
PH
381PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
382
4730f942
PH
383PH/45 When the plaintext authenticator is running as a client, the server's
384 challenges are checked to ensure they are valid base64 strings. By
385 default, the authentication attempt is cancelled if an invalid string is
386 received. Setting client_ignore_invalid_base64 true ignores these errors.
387 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
388 they are received. Thus, the responses can be made to depend on the
389 challenges. If an invalid string is ignored, an empty string is placed in
390 the variable.
391
30dba1e6
PH
392PH/46 Messages that are created by the autoreply transport now contains a
393 References: header, in accordance with RFCs 2822 and 3834.
394
382afc6b
PH
395PH/47 Added authenticated_sender_force to the smtp transport.
396
a86229cf
PH
397PH/48 The ${prvs expansion was broken on systems where time_t was long long.
398
50c99ba6
PH
399PH/49 Installed latest patch from the Sieve maintainer.
400
d35e429d
PH
401PH/50 When an Exim quota was set without a file count quota, and mailbox_size
402 was also set, the appendfile transport was unnecessarily scanning a
403 directory of message files (e.g. for maildir delivery) to find the count
404 of files (along with the size), even though it did not need this
405 information. It now does the scan only if it needs to find either the
406 size of the count of files.
407
f90d018c
PH
408PH/51 Added ${time_eval: to convert Exim time strings into seconds.
409
75def545
PH
410PH/52 Two bugs concerned with error handling when the smtp transport is
411 used in LMTP mode:
412
413 (i) Exim was not creating retry information for temporary errors given
414 for individual recipients after the DATA command when the smtp transport
415 was used in LMTP mode. This meant that they could be retried too
416 frequently, and not timed out correctly.
417
418 (ii) Exim was setting the flag that allows error details to be returned
419 for LMTP errors on RCPT commands, but not for LMTP errors for individual
420 recipients that were returned after the DATA command.
421
422PH/53 This is related to PH/52, but is more general: for any failing address,
423 when detailed error information was permitted to be returned to the
424 sender, but the error was temporary, then after the final timeout, only
425 "retry timeout exceeded" was returned. Now it returns the full error as
426 well as "retry timeout exceeded".
427
c46782ef
PH
428PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
429 do this, and (what is worse) MTAs that accept it.
430
71fafd95
PH
431PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
432 will now be deprecated.
433
2c5db4fd
PH
434PH/56 New os.c-cygwin from the Cygwin maintainer.
435
9cf6b11a
JJ
436JJ/06 exipick: added --unsorted option to allow unsorted output in all output
437 formats (previously only available in exim formats via -bpr, -bpru,
438 and -bpra. Now also available in native and exiqgrep formats)
439
440JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
441 with very large, slow to parse queues
442
443JJ/08 exipick: added ! as generic prefix to negate any criteria format
444
445JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
446
898d150f
PH
447PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
448 responses to authentication challenges, though it was showing the
449 challenges; (ii) I've removed the CR characters from the debug output for
450 SMTP output lines.
451
46218253
PH
452PH/58 Allow for the insertion of a newline as well as a space when a string
453 is turned into more than one encoded-word during RFC 2047 encoding. The
454 Sieve code now uses this.
455
e97957bc
PH
456PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
457 data_4xx, lost_connection, tls_required.
458
81e509d7
PH
459PH/60 When a VRFY deferred or FAILED, the log message rather than the user
460 message was being sent as an SMTP response.
461
3d240ff7
PH
462PH/61 Add -l and -k options to exicyclog.
463
b37c4101
PH
464PH/62 When verifying, if an address was redirected to one new address, so that
465 verification continued, and the new address failed or deferred after
466 having set something in $address_data, the value of $address_data was not
467 passed back to the ACL. This was different to the case when no
468 redirection occurred. The value is now passed back in both cases.
469
79378e0f
PH
470PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
471 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
472 use login_cap.h, so on its own it isn't the distinguishing feature. The
473 new name refers directly to the setclassresources() function.
474
e49c7bb4
PH
475PH/65 Added configuration files for NetBSD3.
476
d114ec46
PH
477PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
478
f3d7df6c
PH
479PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
480 is preferred over IPv4.
481
715ab376
PH
482PH/68 The bounce_return_message and bounce_return_body options were not being
483 honoured for bounces generated during the reception of non-SMTP messages.
484 In particular, this applied to messages rejected by the ACL. This bug has
485 been fixed. However, if bounce_return_message is true and bounce_return_
486 body is false, the headers that are returned for a non-SMTP message
487 include only those that have been read before the error was detected.
488 (In the case of an ACL rejection, they have all been read.)
489
6b31b150
PH
490PH/69 The HTML version of the specification is now built in a directory called
491 spec_html instead of spec.html, because the latter looks like a path with
492 a MIME-type, and this confuses some software.
493
494PH/70 Catch two compiler warnings in sieve.c.
495
d515a917
PH
496PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
497 function verify_get_ident() calls ip_connect() to connect a socket, but
498 if the "connect()" function timed out, ip_connect() used to close the
499 socket. However, verify_get_ident() also closes the socket later, and in
500 between Exim writes to the log, which may get opened at this point. When
501 the socket was closed in ip_connect(), the log could get the same file
502 descriptor number as the socket. This naturally causes chaos. The fix is
503 not to close the socket in ip_connect(); the socket should be closed by
504 the function that creates it. There was only one place in the code where
505 this was missing, in the iplookup router, which I don't think anybody now
506 uses, but I've fixed it anyway.
507
9b8fadde
PH
508PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
509 well as to direct DNS lookups. Otherwise the handling of names in host
510 lists is inconsistent and therefore confusing.
511
214e2000 512
5de37277
PH
513Exim version 4.60
514-----------------
515
cc38ddbf
PH
516PH/01 Two changes to the default runtime configuration:
517
518 (1) Move the checks for relay_from_hosts and authenticated clients from
519 after to before the (commented out) DNS black list checks.
520
521 (2) Add control=submission to the relay_from_hosts and authenticated
522 clients checks, on the grounds that messages accepted by these
523 statements are most likely to be submissions.
5de37277 524
72fdd6ae
PH
525PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
526
527 (1) Generate an error if the third argument for the ${prvs expansion is
528 not a single digit.
529
530 (2) Treat a missing third argument of ${prvscheck as if it were an empty
531 string.
532
533 (3) Reset the variables that are obtained from the first argument of
534 ${prvscheck and used in the second argument before leaving the code,
535 because their memory is reclaimed, so using them afterwards may do
536 silly things.
537
538 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
539 one (it's much easier than Tom thought :-).
540
541 (5) Because of (4), we can now allow for the use of $prvscheck_result
542 inside the third argument.
cb9328de 543
cb741023
PH
544PH/03 For some reason, the default setting of PATH when running a command from
545 a pipe transport was just "/usr/bin". I have changed it to
546 "/bin:/usr/bin".
547
f174f16e
PH
548PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
549 anything to be listed in the output from -bV.
b2f5a032 550
c25242d7
PH
551PH/05 When a filter generated an autoreply, the entire To: header line was
552 quoted in the delivery log line, like this:
553
554 => >A.N.Other <ano@some.domain> <original@ddress> ...
555
556 This has been changed so that it extracts the operative address. There
557 may be more than one such address. If so, they are comma-separated, like
558 this:
559
560 => >ano@some.domain,ona@other.domain <original@ddress> ...
561
82c19f95
PH
562PH/06 When a client host used a correct literal IP address in a HELO or EHLO
563 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
564 not being looked up in the rDNS to get a host name, Exim was showing the
565 IP address twice in Received: lines, even though the IP addresses were
566 identical. For example:
567
568 Received: from [1.2.3.4] (helo=[1.2.3.4])
569
570 However, if the real host name was known, it was omitting the HELO data
571 if it matched the actual IP address. This has been tidied up so that it
572 doesn't show the same IP address twice.
573
d7ffbc12
PH
574PH/07 When both +timestamp and +memory debugging was on, the value given by
575 $tod_xxx expansions could be wrong, because the tod_stamp() function was
576 called by the debug printing, thereby overwriting the timestamp buffer.
577 Debugging no longer uses the tod_stamp() function when +timestamp is set.
578
9f526266
PH
579PH/08 When the original message was included in an autoreply transport, it
580 always said "this is a copy of the message, including all the headers",
581 even if body_only or headers_only was set. It now gives an appropriate
582 message.
583
87fcc8b9
PH
584PH/09 Applied a patch from the Sieve maintainer which:
585
586 o fixes some comments
587 o adds the (disabled) notify extension core
588 o adds some debug output for the result of if/elsif tests
589 o points to the current vacation draft in the documentation
590 and documents the missing references header update
591
592 and most important:
593
594 o fixes a bug in processing the envelope test (when testing
595 multiple envelope elements, the last element determinted the
596 result)
597
456682f5
PH
598PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
599 Electronic Mail") by including:
600
601 Auto-submitted: auto-generated
602
603 in the messages that it generates (bounce messages and others, such as
604 warnings). In the case of bounce messages for non-SMTP mesages, there was
605 also a typo: it was using "Auto_submitted" (underscore instead of
606 hyphen). Since every message generated by Exim is necessarily in response
607 to another message, thes have all been changed to:
608
609 Auto-Submitted: auto-replied
610
611 in accordance with these statements in the RFC:
612
613 The auto-replied keyword:
614
615 - SHOULD be used on messages sent in direct response to another
616 message by an automatic process,
617
618 - MUST NOT be used on manually-generated messages,
619
620 - MAY be used on Delivery Status Notifications (DSNs) and Message
621 Disposition Notifications (MDNs),
622
623 - MUST NOT be used on messages generated by automatic or periodic
624 processes, except for messages which are automatic responses to
625 other messages.
626
3e46c1aa
PH
627PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
628 to the default Received: header definition.
456682f5 629
49826d12
PH
630PH/12 Added log selector acl_warn_skipped (default on).
631
eba0c039
PH
632PH/13 After a successful wildlsearch lookup, discard the values of numeric
633 variables because (a) they are in the wrong storage pool and (b) even if
634 they were copied, it wouldn't work properly because of the caching.
635
a0d6ba8a
PH
636PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
637 checking when decoding. Apparently there are clients that generate
638 overlong encoded strings. Why am I not surprised?
639
f0917727
PH
640PH/15 If the first argument of "${if match_address" was not empty, but did not
641 contain an "@" character, Exim crashed. Now it writes a panic log message
642 and treats the condition as false.
643
096fee00
PH
644PH/16 In autoreply, treat an empty string for "once" the same as unset.
645
024bd3c2
PH
646PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
647 extension "envelope-auth". The code is finished and in agreement with
648 other implementations, but there is no documentation so far and in fact,
649 nobody wrote the draft yet. This extension is currently #undef'ed, thus
650 not changing the active code.
651
652 Print executed "if" and "elsif" statements when debugging is used. This
653 helps a great deal to understand what a filter does.
654
655 Document more things not specified clearly in RFC3028. I had all this
656 sorted out, when out of a sudden new issues came to my mind. Oops."
657
df199fec
PH
658PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
659 (Bugzilla #53).
660
d27f1df3
PH
661PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
662 canonical form (as documented). However, after a host name lookup from
663 the IP address, check_host() was doing a simple string comparison with
664 addresses acquired from the DNS when checking that the found name did
665 have the original IP as one of its addresses. Since any found IPv6
666 addresses are likely to be in abbreviated form, the comparison could
667 fail. Luckily, there already exists a function for doing the comparison
668 by converting both addresses to binary, so now that is used instead of
669 the text comparison.
670
96776534
PH
671PH/20 There was another similar case to PH/19, when a complete host name was
672 given in a host list; looking up its IP address could give an abbreviated
673 form, whereas the current host's name might or might not be abbreviated.
674 The same fix has been applied.
675
5de37277 676
9a799bc0
PH
677Exim version 4.54
678-----------------
679
680PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
681 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
682 It now does.
683
99a4b039
PH
684PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
685 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
686
687PH/03 Typo: missing ".o" in src/pcre/Makefile.
688
4b233853
PH
689PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
690 header line, restrict the check to what is listed in RFCs 2369 and 2929.
691 Also, for "Auto-Submitted", treat anything other than "no" as
692 non-personal, in accordance with RFC 3834. (Previously it treated
693 anything starting "auto-" as non-personal.)
694
8857ccfd
PH
695TF/01 The control=submission/name=... option had a problem with syntax
696 errors if the name included a slash character. The /name= option
697 now slurps the rest of the string, so it can include any characters
698 but it must come last in the list of options (after /sender_retain
699 or /domain=).
700
433a2980
PH
701PH/05 Some modifications to the interface to the fake nameserver for the new
702 testing suite.
703
3e46c1aa 704
9a799bc0 705
e3a311ba
TK
706Exim version 4.53
707-----------------
708
709TK/01 Added the "success_on_redirect" address verification option. See
710 NewStuff for rationale and an example.
711
13b685f9
PH
712PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
713
395ff96d
PH
714PH/02 Patch to exigrep to allow it to work on syslog lines.
715
5b68f6e4
PH
716PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
717 fread() to skip over the body file's header line, because in Cygwin the
718 header line is locked and is inaccessible.
719
1ab52c69
PH
720PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
721 co-exist for some time) to make it clear that it is the Exim ID that is
722 referenced, not the Message-ID: header line.
723
b07e6aa3
PH
724PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
725 string_format() function, because snprintf() does not exist on all
726 operating systems.
727
254e032f
PH
728PH/06 The use of forbid_filter_existstest now also locks out the use of the
729 ${stat: expansion item.
730
3af76a81
PH
731PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
732 protocol synchronization error", to keep the pedants happy.
733
2548ba04
PH
734PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
735 well as for IRIX systems, when gcc is being used. See the host.c source
736 file for comments.
737
b6c6011d
PH
738PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
739
cf39cf57
PH
740PH/10 Named domain lists were not working if used in a queue_smtp_domains
741 setting.
742
f1513293
PH
743PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
744 transport and to the smtp transport in LMTP mode.
745
727549a4
PH
746TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
747
af46795e
PH
748PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
749 run a filter in a subprocess. This could lead to confusion in subsequent
750 lookups in the parent process. There should also be a search_tidyup() at
751 the end of the subprocess.
752
d7b47fd0
PH
753PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
754 only if the host matched helo_try_verify_hosts, which caused the
755 verification to occur when the EHLO/HELO command was issued. The ACL just
756 tested the remembered result. Now, if a previous verification attempt has
757 not happened, "verify = helo" does it there and then.
758
ee744174
JJ
759JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
760
b582ab87
PH
761TK/03 Fix log output including CR from clamd.
762
41a13e0a
PH
763PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
764 exist provoked a memory error which could cause a segfault.
765
f625cc5a
PH
766PH/15 Installed PCRE 6.2
767
768PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
769
21f7af35
PH
770PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
771 of the problem. Specifically, suggested +O2 rather than +O1 for the
772 HP-UX compiler.
773
31480e42
PH
774PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
775
2d280592
PH
776PH/20 If a delivery was routed to a non-standard port by means of an SRV
777 record, the port was not correctly logged when the outgoing_port log
778 selector was set (it logged the transort's default port).
779
7cd1141b
PH
780PH/21 Added support for host-specific ports to manualroute, queryprogram,
781 fallback_hosts, and "hosts" in the smtp transport.
782
783PH/22 If the log selector "outgoing_port" is set, the port is now also given on
784 host errors such as "Connection refused".
785
750af86e
PH
786PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
787 authentication with radiusclient 0.4.9:
788
789 - Error returned from rc_read_config was caught wrongly
790 - Username/password not passed on to radius server due to wrong length.
791
792 The presumption is that some radiusclient API changes for 4.51/PH/17
793 were not taken care of correctly. The code is still untested by me (my
794 Linux distribution still has 0.3.2 of radiusclient), but it was
795 contributed by a Radius user.
796
797PH/24 When doing a callout, the value of $domain wasn't set correctly when
798 expanding the "port" option of the smtp transport.
799
4304270b
TK
800TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
801 while reading a MIME header. Thanks to Tom Hughes for a patch.
802
750af86e
PH
803PH/24 Include config.h inside local_scan.h so that configuration settings are
804 available.
805
64ffc24f
PH
806PH/25 Make $smtp_command_argument available after all SMTP commands. This means
807 that in an ACL for RCPT (for example), you can examine exactly what was
808 received.
809
5dd9625b
PH
810PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
811 commands, but it was not correctly comparing the address with the actual
812 client host address. Thus, it would show the EHLO address in Received:
813 header lines when this was not necessary.
814
5591031b
PH
815PH/27 Added the % operator to ${eval:}.
816
ba18e66a
PH
817PH/28 Exim tries to create and chdir to its spool directory when it starts;
818 it should be ignoring failures (because with -C, for example, it has lost
819 privilege). It wasn't ignoring creation failures other than "already
820 exists".
821
9cec981f
PH
822PH/29 Added "crypteq" to the list of supported features that Exim outputs when
823 -bV or -d is used.
824
aa2b5c79
PH
825PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
826 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
827 too many continuations, the temporary file was not being removed, and the
828 return code was incorrect.
aa2b5c79 829
48a53b7f
PH
830PH/31 Missing "BOOL" in function definition in filtertest.c.
831
1c59d63b
PH
832PH/32 Applied Sieve patches from the maintainer.
833
671012da
TK
834TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
835
1509d3a8
PH
836PH/33 Added "verify = not_blind".
837
838PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
839 Local/Makefile (with some defaults set). These are used in built scripts
840 such as exicyclog, but they have never been used in the exim_install
841 script (though there are many overriding facilities there). I have
842 arranged that the exim_install script now takes note of these two
843 settings.
844
845PH/35 Installed configuration files for Dragonfly.
846
2fe1a124
PH
847PH/36 When a locally submitted message by a trusted user did not contain a
848 From: header, and the sender address was obtained from -f or from an SMTP
849 MAIL command, and the trusted user did not use -F to supply a sender
850 name, $originator_name was incorrectly used when constructing a From:
851 header. Furthermore, $originator_name was used for submission mode
852 messages from external hosts without From: headers in a similar way,
853 which is clearly wrong.
854
8800895a
PH
855PH/37 Added control=suppress_local_fixups.
856
ccfdb010
PH
857PH/38 When log_selector = +received_sender was set, and the addition of the
858 sender made the log line's construction buffer exactly full, or one byte
859 less than full, an overflow happened when the terminating "\n" was
860 subsequently added.
861
1130bfb0
PH
862PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
863 when the result of a list match is failure because a DNS lookup failed.
864
ebcb507f
PH
865PH/40 RM_COMMAND is now used in the building process.
866
c35e155c
PH
867PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
868 the "build-* directories that it finds.
869
95d1f782
PH
870PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
871 address in a domain literal was a prefix of an interface address.
872
fd6de02e
PH
873PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
874 when verifying a sender address, unless rewrite_headers is false.
875
58de37c5
PH
876PH/44 Wrote a long comment about why errors_to addresses are verified as
877 recipients, not senders.
878
261cf466
TF
879TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
880 the ratelimit ACL was added.
881
3ee512ff
PH
882PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
883
e08c430f
PH
884PH/46 Added extra information about PostgreSQL errors to the error string.
885
bef5a11f
PH
886PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
887 avoiding the need to install special zones in a real server. This is
888 backwards compatible; if it can't find the fake resolver, it drops back.
889 Thus, both old and new test suites can be run.
890
7546de58
TF
891TF/02 Added util/ratelimit.pl
892
e5d5a95f
TF
893TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
894 clock is set back in time.
895
2e88a017
TF
896TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
897 Candler <B.Candler@pobox.com>.
898
a5f65aa4
TF
899TF/05 The fix for PH/43 was not completely correct; widen_domains is always
900 OK for addresses that are the result of redirections.
901
e7726cbf
PH
902PH/48 A number of further additions for the benefit of the new test suite,
903 including a fake gethostbyname() that interfaces to the fake DNS resolver
904 (see PH/47 above).
905
a7fdad5b
TF
906TF/06 The fix for widen_domains has also been applied to qualify_single and
907 search_parents which are the other dnslookup options that can cause
908 header rewrites.
909
6af56900
PH
910PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
911 type ("H").
912
0925ede6
PH
913PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
914
66afa403
TF
915TF/07 Exim produced the error message "an SRV record indicated no SMTP
916 service" if it encountered an MX record with an empty target hostname.
917 The message is now "an MX or SRV record indicated no SMTP service".
918
0154e85a
TF
919TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
920 if the DNS of the sending site is misconfigured. This is quite a
921 common situation. This change restores the behaviour of treating a
922 helo verification defer as a failure.
923
16f12c76
PH
924PH/51 If self=fail was set on a router, the bounce message did not include the
925 actual error message.
926
bbe902f0 927
e5a9dba6
PH
928Exim version 4.52
929-----------------
930
931TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
932
22c3b60b
PH
933PH/01 When a transport filter timed out in a pipe delivery, and the pipe
934 command itself ended in error, the underlying message about the transport
935 filter timeout was being overwritten with the pipe command error. Now the
936 underlying error message should be appended to the second error message.
937
06a9b4b5
PH
938TK/01 Fix poll() being unavailable on Mac OSX 10.2.
939
c1ac6996
PH
940PH/02 Reduce the amount of output that "make" produces by default. Full output
941 can still be requested.
942
9c7a242c
PH
943PH/03 The warning log line about a condition test deferring for a "warn" verb
944 was being output only once per connection, rather than after each
945 occurrence (because it was using the same function as for successful
946 "warn" verbs). This seems wrong, so I have changed it.
947
87ba3f5f
PH
948TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
949 it should not have, which might have caused a crash in the right
950 circumstances, but probably never did.
951
952PH/04 Installed a modified version of Tony Finch's patch to make submission
953 mode fix the return path as well as the Sender: header line, and to
954 add a /name= option so that you can make the user's friendly name appear
955 in the header line.
956
29aba418
TF
957TF/03 Added the control = fakedefer ACL modifier.
958
fe0dab11
TF
959TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
960 Mark Lowes for thorough testing.
870f6ba8 961
11d337a4
TK
962TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
963
964TK/03 Merged latest SRS patch from Miles Wilton.
965
415c8f3b
PH
966PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
967 with the definition in sysexits.h (which is #included earlier).
968 Fortunately, Exim does not actually use EX_OK. The code used to try to
969 preserve the sysexits.h value, by assumimg that macro definitions were
970 scanned for macro replacements. I have been disabused of this notion,
971 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 972
958541e9
PH
973PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
974 in the smtp transport. When a block could not be written in a single
975 write() function, the timeout was being re-applied to each part-write.
976 This seems wrong - if the receiver was accepting one byte at a time it
977 would take for ever. The timeout is now adjusted when this happens. It
978 doesn't have to be particularly precise.
979
c206415f
TK
980TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
981 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
982
2a4be8f9
PH
983PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
984 without a domain if the check to <postmaster@domain> fails.
985
1cba11c5
SC
986SC/01 Eximstats: added -xls and the ability to specify output files
987 (patch written by Frank Heydlauf).
988
989SC/02 Eximstats: use FileHandles for outputing results.
990
991SC/03 Eximstats: allow any combination of xls, txt, and html output.
992
993SC/04 Eximstats: fixed display of large numbers with -nvr option
994
995SC/05 Eximstats: fixed merging of reports with empty tables.
996
997SC/06 Eximstats: added the -include_original_destination flag
998
999SC/07 Eximstats: removed tabs and trailing whitespace.
1000
1005d00e
TK
1001TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1002
1003TK/06 MBOX spool code: Add real "From " MBOX separator line
1004 so the .eml file is really in mbox format (even though
1005 most programs do not really care). Patch from Alex Miller.
1006
1007TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1008 The latter is generated from $received_to and is only set if the
1009 message has one envelope recipient. SA can use these headers,
1010 obviously out-of-the-box. Patch from Alex Miller.
1011
9b4768fa
PH
1012PH/08 The ${def test on a variable was returning false if the variable's
1013 value was "0", contrary to what the specification has always said!
1014 The result should be true unless the variable is empty.
1015
1016PH/09 The syntax error of a character other than { following "${if
1017 def:variable_name" (after optional whitespace) was not being diagnosed.
1018 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1019 accidental colon was present, for example, could give incorrect results.
1020
0d7eb84a
PH
1021PH/10 Tidied the code in a number of places where the st_size field of a stat()
1022 result is used (not including appendfile, where other changes are about
1023 to be made).
1024
1025PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1026 This involved changing a lot of size variables from int to off_t. It
1027 should work with maildirs and everything.
1028
40727bee
TK
1029TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1030 spamd dying while we are connected to it.
1031
554d2369
TF
1032TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1033 <jgh@wizmail.org>
1034
1f922db1
PH
1035PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1036 function for BDB 4.3.
1037
ef213c3b
PH
1038PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1039
8ac170f3
PH
1040PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1041 the sources for PCRE have been re-arranged and more files are now
1042 involved.
1043
b1c749bb
PH
1044PH/15 The code I had for printing potentially long long variables in PH/11
1045 above was not the best (it lost precision). The length of off_t variables
1046 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
1047 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1048 to be "long long int" or "long int". This is needed for the internal
1049 formatting function string_vformat().
b1c749bb 1050
4aac9b49
PH
1051PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1052 the configuration file to be ":syslog", then the script "guesses" where
1053 the logs files are, rather than using the compiled in default. In our
1054 case the guess is not the same as the compiled default, so the script
1055 suddenly stopped working when I started to use syslog. The patch checks
1056 to see if log_file_path is "". If so, it attempts to read it from exim
1057 with no configuration file to get the compiled in version, before it
1058 falls back to the previous guessing code."
1059
294520c8
TK
1060TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1061 implementing BATV in an Exim configuration. See NewStuff for the gory
1062 details.
1063
5bd022fe
PH
1064PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1065 Makefile that are specific to HP-UX.
1066
90e9ce59
PH
1067PH/18 If the "use_postmaster" option was set for a recipient callout together
1068 with the "random" option, the postmaster address was used as the MAIL
1069 FROM address for the random test, but not for the subsequent recipient
1070 test. It is now used for both.
1071
5ea81592
PH
1072PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1073 patch removes a few documentation additions to RFC 3028, because the
1074 latest draft now contains them. It adds the new en;ascii-case comparator
1075 and a new error check for 8bit text in MIME parts. Comparator and
1076 require names are now matched exactly. I enabled the subaddress
1077 extension, but it is not well tested yet (read: it works for me)."
1078
c6c2dc1d
PH
1079PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1080 rework some of the code of TK/09 above to avoid the hardwired use of
1081 "%lld" and "long long". Replaced the call to snprintf() with a call to
1082 string_vformat().
1083
fffffe4c
PH
1084PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1085 records point to non-existent hosts", "retry timeout exceeded", and
1086 "retry time not reached for any host after a long failure period".
ca02eafb 1087
9a26b6b2
PH
1088PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1089 experimental DomainKeys support:
1090
1091 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1092 (2) On an error such as an illegally used "control", the wrong name for
1093 the control was given.
1094
1095 These problems did NOT occur unless DomainKeys support was compiled.
1096
4aee0225
PH
1097PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1098
32d668a5
PH
1099PH/24 Added ${if match_ip condition.
1100
8187c3f3
PH
1101PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1102 databases so that it will be absolutely obvious if a crash occurs in the
1103 DB library. This is a regular occurrence (often caused by mis-matched
1104 db.h files).
1105
ff790e47 1106PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1107 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1108 picked up on a user's system that detects such things. There doesn't seem
1109 to be a gcc warning option for this - only an attribute that has to be
1110 put on the function's prototype. It seems that in Fedora Core 4 they have
1111 set this on a number of new functions. No doubt there will be more in due
1112 course.
ff790e47 1113
5417f6d1
PH
1114PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1115 specify a transport. However, if an address that was verified by such a
1116 router was the subject of a callout, Exim crashed because it tried to
1117 read the rcpt_include_affixes from the non-existent transport. Now it
1118 just assumes that the setting of that option is false. This bug was
1119 introduced by 4.51/PH/31.
1120
59cf8544
PH
1121PH/28 Changed -d+all to exclude +memory, because that information is very
1122 rarely of interest, but it makes the output a lot bigger. People tend to
1123 do -d+all out of habit.
1124
e7ad8a65
PH
1125PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1126 code in os-type was giving problems when libc.so lives in lib64, like on
1127 x86_64 Fedora Core.
1128
ade42478
PH
1129PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1130 aren't the modern standard, and it seems that some systems' include files
1131 don't always have them. Exim was already checking for some of the newer
1132 ones like T_AAAA, and defining it itself. I've added checks for all the
1133 record types that Exim uses.
1134
182ad5cf
PH
1135PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1136 not automatically generating a new one, as it is supposed to. This
1137 prevented TLS from working. If the file did exist, but contained invalid
1138 data, a new version was generated, as expected. It was only the case of a
1139 non-existent file that was broken.
1140
b0d9fc80
TK
1141TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1142 with a change in libdomainkeys > 0.64.
1143
1144TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1145 from DNS. If the selector record carries the flag, it now has
1146 precedence over the domain-wide flag.
1147
1148TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1149
47c7a64a
PH
1150PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1151 the use of a port name that isn't defined in /etc/services) occurred, the
1152 message was deferred as in a normal delivery, and thus remained on the
1153 spool, instead of being failed because of the mua_wrapper setting. This
1154 is now fixed, and I tidied up some of the mua_wrapper messages at the
1155 same time.
1156
a388bce4
SC
1157SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1158 the messages in a hash of arrays rather than using individual hashes.
1159 This is a bit cleaner and results in dramatic memory savings, albeit
1160 at a slight CPU cost.
1161
1162SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1163 as requested by Marc Sherman.
1164
1165SC/10 Eximstats: added histograms for user specified patterns as requested
1166 by Marc Sherman.
1167
0793e4ed
SC
1168SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1169
c58b88df
PH
1170PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1171 fopen() in the content-scanning modules that did not already have it.
1172
e7ad8a65 1173
7982096b
PH
1174Exim version 4.51
1175-----------------
1176
1a46a8c5
PH
1177TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1178 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1179
2f079f46 1180TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1181
1182TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1183
1184PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1185 to test Sieve filters that use "vacation".
1186
1187PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1188 that changes the way the GnuTLS parameters are stored in the cache file.
1189 The new format can be generated externally. For backward compatibility,
1190 if the data in the cache doesn't make sense, Exim assumes it has read an
1191 old-format file, and it generates new data and writes a new file. This
1192 means that you can't go back to an older release without removing the
1193 file.
1194
1195PH/03 A redirect router that has both "unseen" and "one_time" set does not
1196 work if there are any delivery delays because "one_time" forces the
1197 parent to be marked "delivered", so its unseen clone is never tried
1198 again. For this reason, Exim now forbids the simultaneous setting of
1199 these two options.
1200
1201PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1202 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1203 entry if you want to know the details. The fix, however, neglected to
1204 consider the case when local delivery batching is involved. The test for
1205 "previously delivered" was not happening when checking to see if an
1206 address could be batched with a previous (undelivered) one; under
1207 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1208 address.
1a46a8c5
PH
1209
1210PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1211 in its include files, and this causes problems building Exim.
1212
1213PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1214 header_syntax) but Exim was just ignoring anything given after a slash.
1215 In particular, this caused confusion with an attempt to use "verify =
1216 reverse_host_lookup/defer_ok". An error is now given when options are
1217 supplied for verify items that do not have them. (Maybe reverse_host_
1218 lookup should have a defer_ok option, but that's a different point.)
1219
1220PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1221 defined by RFC 821) to 2048, because there were problems with some AUTH
1222 commands, and RFC 1869 says the size should be increased for extended
1223 SMTP commands that take arguments.
1224
1225PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1226 Finch).
1227
1228PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1229 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1230
49c2d5ea
PH
1231PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1232 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1233 whatever). Otherwise the password may appear in the log. Following change
1234 PH/42 below, there is no longer a chance of it appearing in a bounce
1235 message.
49c2d5ea 1236
bf759a8b
PH
1237PH/11 Installed exipick version 20050225.0 from John Jetmore.
1238
83364d30
PH
1239PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1240 of its addresses was ever tried. (Bugzilla bug #2.)
1241
7999bbd7
PH
1242PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1243 the result incorrectly in the debug output. (It correctly added a newline
1244 to what was transported.)
1245
7dbf77c9
PH
1246TF/01 Added $received_time.
1247
74e0617f
PH
1248PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1249 commented out examples of how to interface to a virus scanner and to
1250 SpamAssassin. Also added commented examples of av_scanner and
1251 spamd_address settings.
1252
2f079f46
PH
1253PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1254 and controls are allowed in which ACLs. There were a couple of minor
1255 errors. Some of the entries in the conditions table (which is a table of
1256 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1257 negation of where the condition IS allowed.
1258
8c841523
PH
1259PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1260
7766a4f0
PH
1261PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1262 header file does not have a version number, so I've had to invent a new
1263 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1264 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1265 radiusclient), but it was contributed by a Radius user.
1266
8b417f2c
PH
1267PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1268 files or directories, for OpenSSL.
1269
901f42cb
PH
1270PH/19 When an Exim process that is running as root has to create an Exim log
1271 file, it does so in a subprocess that runs as exim:exim so as to get the
1272 ownership right at creation (otherwise, other Exim processes might see
1273 the file with the wrong ownership). There was no test for failure of this
1274 fork() call, which would lead to the process getting stuck as it waited
1275 for a non-existent subprocess. Forks do occasionally fail when resources
1276 run out. I reviewed all the other calls to fork(); they all seem to check
1277 for failure.
1278
f9b9210e
PH
1279PH/20 When checking for unexpected SMTP input at connect time (before writing
1280 the banner), Exim was not dealing correctly with a non-positive return
1281 from the read() function. If the client had disconnected by this time,
1282 the result was a log entry for a synchronization error with an empty
1283 string after "input=" when read() returned zero. If read() returned -1
1284 (an event I could not check), uninitialized data bytes were printed.
1285 There were reports of junk text (parts of files, etc) appearing after
1286 "input=".
1287
54cdb463
PH
1288PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1289
cf00dad6
PH
1290PH/22 Added support for macro redefinition, and (re)definition in between
1291 driver and ACL definitions.
1292
acb1b346
PH
1293PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1294 forgetting to use the resulting value; it was using the unexpanded value.
1295
c5ddb310
PH
1296PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1297 hadn't been configured. The fix is from Juergen Kreileder, who
1298 understands it better than I do:
1299
1300 "Here's what I see happening with three configured cyrus_sasl
1301 authenticators configured (plain, login, cram-md5):
1302
1303 On startup auth_cyrus_sasl_init() gets called for each of these.
1304 This means three calls to sasl_listmech() without a specified mech_list.
1305 => SASL tests which mechs of all available mechs actually work
1306 => three warnings about OTP not working
1307 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1308
1309 With the patch, sasl_listmech() also gets called three times. But now
1310 SASL's mech_list option is set to the server_mech specified in the the
1311 authenticator. Or in other words, the answer from sasl_listmech()
1312 gets limited to just the mech you're testing for (which is different
1313 for each call.)
1314 => the return list contains just 'plain' or 'login', 'cram-md5' or
1315 nothing depending on the value of ob->server_mech.
1316
1317 I've just tested the patch: Authentication still works fine,
1318 unavailable mechs specified in the exim configuration are still
1319 caught, and the auth.log warnings about OTP are gone."
1320
31619da6
PH
1321PH/25 When debugging is enabled, the contents of the command line are added
1322 to the debugging output, even when log_selector=+arguments is not
1323 specified.
1324
bebaf0fc
PH
1325PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1326 answer is "GNU", and only if the return is "GNU/something" is the answer
1327 "Linux".
1328
475fe28a
PH
1329PH/27 $acl_verify_message is now set immediately after the failure of a
1330 verification in an ACL, and so is available in subsequent modifiers. In
1331 particular, the message can be preserved by coding like this:
1332
1333 warn !verify = sender
1334 set acl_m0 = $acl_verify_message
1335
1336 Previously, $acl_verify_message was set only while expanding "message"
1337 and "log_message" when a very denied access.
1338
7e8bec7a
PH
1339PH/28 Modified OS/os.c-Linux with
1340
1341 -#ifndef OS_LOAD_AVERAGE
1342 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1343
1344 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1345 nomenclature these days.)
1346
e4a89c47
PH
1347PH/29 Installed patch from the Sieve maintainer that adds the options
1348 sieve_useraddress and sieve_subaddress to the redirect router.
1349
5ca2a9a1
PH
1350PH/30 In these circumstances:
1351 . Two addresses routed to the same list of hosts;
1352 . First host does not offer TLS;
1353 . First host accepts first address;
1354 . First host gives temporary error to second address;
1355 . Second host offers TLS and a TLS session is established;
1356 . Second host accepts second address.
1357 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1358 and peerdn, if requested) that were in fact used only for the second
1359 address.
7e8bec7a 1360
c688b954
PH
1361PH/31 When doing a callout as part of verifying an address, Exim was not paying
1362 attention to any local part prefix or suffix that was matched by the
1363 router that accepted the address. It now behaves in the same way as it
1364 does for delivery: the affixes are removed from the local part unless
1365 rcpt_include_affixes is set on the transport.
1366
fed77020
PH
1367PH/32 Add the sender address, as F=<...>, to the log line when logging a
1368 timeout during the DATA phase of an incoming message.
1369
7fe1560f
PH
1370PH/33 Sieve envelope tests were broken for match types other than :is. I have
1371 applied a patch sanctioned by the Sieve maintainer.
c688b954 1372
ebb6e6d5
PH
1373PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1374 the uid or gid is negative. A case of a negative gid caused this to be
1375 noticed. The fix allows for either to be negative.
1376
9c4e8f60
PH
1377PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1378 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1379 overlooked.
1380
1381PH/36 The change PH/12 above was broken. Fixed it.
1382
d7174846
PH
1383PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1384 the grounds that routing the same address twice would always produce the
1385 same answer. This might have been true once, but it is certainly no
1386 longer true now. Routing a child address may depend on the previous
1387 routing that produced that child. Some complicated redirection strategies
1388 went wrong when messages had multiple recipients, and made Exim's
1389 behaviour dependent on the order in which the addresses were given.
1390
1391 I have moved the duplicate checking until after the routing is complete.
1392 Exim scans the addresses that are assigned to local and remote
1393 transports, and removes any duplicates. This means that more work will be
1394 done, as duplicates will always all be routed, but duplicates are
1395 presumably rare, so I don't expect this is of any significance.
1396
1397 For deliveries to pipes, files, and autoreplies, the duplicate checking
1398 still happens during the routing process, since they are not going to be
1399 routed further.
1400
cfe75fc3
PH
1401PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1402 It corrects a timeout issue with spamd. This is Ian's comment: "The
1403 background is that sometimes spamd either never reads data from a
1404 connection it has accepted, or it never writes response data. The exiscan
1405 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1406 blindly assumes that writes won't block so it may never time out."
1407
be22d70e
PH
1408PH/39 Allow G after quota size as well as K and M.
1409
0612b098
PH
1410PH/40 The value set for $authenticated_id in an authenticator may not contain
1411 binary zeroes or newlines because the value is written to log lines and
1412 to spool files. There was no check on this. Now the value is run through
1413 the string_printing() function so that such characters are converted to
1414 printable escape sequences.
1415
2e0c1448
PH
1416PH/41 $message_linecount is a new variable that contains the total number of
1417 lines in the message. Compare $body_linecount, which is the count for the
1418 body only.
1419
447d236c
PH
1420PH/42 Exim no longer gives details of delivery errors for specific addresses in
1421 bounce and delay warning messages, except in certain special cases, which
1422 are as follows:
1423
1424 (a) An SMTP error message from a remote host;
1425 (b) A message specified in a :fail: redirection;
1426 (c) A message specified in a "fail" command in a system filter;
1427 (d) A message specified in a FAIL return from the queryprogram router;
1428 (e) A message specified by the cannot_route_message router option.
1429
1430 In these cases only, Exim does include the error details in bounce and
1431 warning messages. There are also a few cases where bland messages such
1432 as "unrouteable address" or "local delivery error" are given.
1433
d20976dc
PH
1434PH/43 $value is now also set for the "else" part of a ${run expansion.
1435
f656d135
PH
1436PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1437 being worked on, but at least Exim now implements the latest version to
1438 play with."
1439
2e2a30b4
PH
1440PH/45 In a pipe transport, although a timeout while waiting for the pipe
1441 process to complete was treated as a delivery failure, a timeout while
1442 writing the message to the pipe was logged, but erroneously treated as a
1443 successful delivery. Such timeouts include transport filter timeouts. For
1444 consistency with the overall process timeout, these timeouts are now
1445 treated as errors, giving rise to delivery failures by default. However,
1446 there is now a new Boolean option for the pipe transport called
1447 timeout_defer, which, if set TRUE, converts the failures into defers for
1448 both kinds of timeout. A transport filter timeout is now identified in
1449 the log output.
1450
9176e9f0
PH
1451PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1452 systems where "make" and "gmake" are different, calling "gmake" at top
1453 level broke things. I've arranged for the value of $(MAKE) to be passed
1454 from the Makefile to this script so that it can call the same version of
1455 "make".
1456
7982096b 1457
bbe902f0
PH
1458A note about Exim versions 4.44 and 4.50
1459----------------------------------------
1460
1461Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1462changes of various kinds. As a consequence, a big documentation update was
1463needed. This delayed the release for rather longer than seemed good, especially
1464in the light of a couple of (minor) security issues. Therefore, the changes
1465that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1466release. So 4.44 and 4.50 are in effect two different branches that both start
1467from 4.43.
1468
1469I have left the 4.50 change log unchanged; it contains all the changes since
14704.43. The change log for 4.44 is below; many of its items are identical to
1471those for 4.50. This seems to be the most sensible way to preserve the
1472historical information.
1473
1474
f7b63901 1475Exim version 4.50
495ae4b0
PH
1476-----------------
1477
5fe762f6
PH
1478 1. Minor wording change to the doc/README.SIEVE file.
1479
139059f6 1480 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1481 computation of the current number of files was incorrect.
495ae4b0 1482
7086e875
PH
1483 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1484 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1485 place.
1486
35af9f61
PH
1487 4. Give more explanation in the error message when the command for a transport
1488 filter fails to execute.
1489
b668c215
PH
1490 5. There are several places where Exim runs a non-Exim command in a
1491 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1492 was being done only for the command run by the queryprogram router. It is
1493 now done for all such subprocesses. The other cases are: ${run, transport
1494 filters, and the commands run by the lmtp and pipe transports.
1495
a494b1e1
PH
1496 6. Added CONFIGURE_GROUP build-time option.
1497
1498 7. Some older OS have a limit of 256 on the maximum number of file
1499 descriptors. Exim was using setrlimit() to set 1000 as a large value
1500 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1501 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1502
c5fcb476
PH
1503 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1504 was an oversight, and furthermore, ever since the addition of extra
1505 controls (e.g. 4.43/32), the checks on when to allow different forms of
1506 "control" were broken. There should now be diagnostics for all cases when a
1507 control that does not make sense is encountered.
1508
69358f02
PH
1509 9. Added the /retain_sender option to "control=submission".
1510
5be20824
PH
151110. $recipients is now available in the predata ACL (oversight).
1512
eb2c0248
PH
151311. Tidy the search cache before the fork to do a delivery from a message
1514 received from the command line. Otherwise the child will trigger a lookup
1515 failure and thereby defer the delivery if it tries to use (for example) a
1516 cached ldap connection that the parent has called unbind on.
1517
2a3eea10
PH
151812. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1519 of $address_data from the recipient verification was clobbered by the
1520 sender verification.
1521
152213. The value of address_data from a sender verification is now available in
1523 $sender_address_data in subsequent conditions in the ACL statement.
1524
23c7ff99
PH
152514. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1526
4deaf07d
PH
152715. Added a new option "connect=<time>" to callout options, to set a different
1528 connection timeout.
1529
926e1192
PH
153016. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1531 was its contents. (It was OK if the option was not defined at all.)
1532
650edc6f
PH
153317. A "Completed" log line is now written for messages that are removed from
1534 the spool by the -Mrm option.
1535
2c7db3f5
PH
153618. New variables $sender_verify_failure and $recipient_verify_failure contain
1537 information about exactly what failed.
1538
3d235903
PH
153919. Added -dd to debug only the daemon process.
1540
7c7ad977
PH
154120. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1542 handles timeouts, both on the server side and network timeouts. Renamed the
1543 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1544
981756db
PH
154521. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1546 It is now set to "smtps".
1547
d4eb88df
PH
154822. $host_address is now set to the target address during the checking of
1549 ignore_target_hosts.
1550
155123. When checking ignore_target_hosts for an ipliteral router, no host name was
1552 being passed; this would have caused $sender_host_name to have been used if
1553 matching the list had actually called for a host name (not very likely,
1554 since this list is usually IP addresses). A host name is now passed as
1555 "[x.x.x.x]".
1556
7d468ab8
PH
155724. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1558 code that specifies a non-restarting handler (typically sigaction() in
1559 modern systems) in an attempt to fix a rare and obscure crash bug.
1560
156125. Narrowed the window for a race in the daemon that could cause it to ignore
1562 SIGCHLD signals. This is not a major problem, because they are used only to
1563 wake it up if nothing else does.
1564
62c0818f
PH
156526. A malformed maildirsize file could cause Exim to calculate negative values
1566 for the mailbox size or file count. Odd effects could occur as a result.
1567 The maildirsize information is now recalculated if the size or filecount
1568 end up negative.
1569
26034054
PH
157027. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1571 support for a long time. Removed HAVE_SYS_VFS_H.
1572
af66f652
PH
157328. Installed the latest version of exipick from John Jetmore.
1574
90af77f4
PH
157529. In an address list, if the pattern was not a regular expression, an empty
1576 subject address (from a bounce message) matched only if the pattern was an
1577 empty string. Non-empty patterns were not even tested. This was the wrong
1578 because it is perfectly reasonable to use an empty address as part of a
1579 database query. An empty address is now tested by patterns that are
1580 lookups. However, all the other forms of pattern expect the subject to
1581 contain a local part and a domain, and therefore, for them, an empty
1582 address still always fails if the pattern is not itself empty.
1583
d8ef3577
PH
158430. Exim went into a mad DNS loop when attempting to do a callout where the
1585 host was specified on an smtp transport, and looking it up yielded more
1586 than one IP address.
1587
5cb8cbc6
PH
158831. Re-factored the code for checking spool and log partition space into a
1589 function that finds that data and another that does the check. The former
1590 is then used to implement four new variables: $spool_space, $log_space,
1591 $spool_inodes, and $log_inodes.
1592
14702f5b
PH
159332. The RFC2047 encoding function was originally intended for short strings
1594 such as real names; it was not keeping to the 75-character limit for
1595 encoded words that the RFC imposes. It now respects the limit, and
1596 generates multiple encoded words if necessary. To be on the safe side, I
1597 have increased the buffer size for the ${rfc2047: expansion operator from
1598 1024 to 2048 bytes.
1599
063b1e99
PH
160033. It is now permitted to omit both strings after an "if" condition; if the
1601 condition is true, the result is "true". As before, when the second string
1602 is omitted, a false condition yields an empty string. This makes it less
1603 cumbersome to write custom ACL and router conditions.
1604
652e1b65
PH
160534. Failure to deliver a bounce message always caused it to be frozen, even if
1606 there was an errors_to setting on the router. The errors_to setting is now
1607 respected.
1608
6f0c9a4f
PH
160935. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1610 canonical form (fully expanded) before being placed in
1611 $sender_host_address.
1612
33397d19
PH
161336. The table in the code that translates DNS record types into text (T_A to
1614 "A" for instance) was missing entries for NS and CNAME. It is just possible
1615 that this could have caused confusion if both these types were looked up
1616 for the same domain, because the text type is used as part of Exim's
1617 per-process caching. But the chance of anyone hitting this buglet seems
1618 very small.
1619
7bb56e1f
PH
162037. The dnsdb lookup has been extended in a number of ways.
1621
1622 (1) There is a new type, "zns", which walks up the domain tree until it
1623 finds some nameserver records. It should be used with care.
1624
ea3bc19b
PH
1625 (2) There is a new type, "mxh", which is like "mx" except that it returns
1626 just the host names, not the priorities.
1627
1628 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1629 looked up. The behaviour when one of the lookups defers can be
1630 controlled by a keyword.
7bb56e1f 1631
ea3bc19b 1632 (4) It is now possible to specify the separator character for use when
7bb56e1f 1633 multiple records are returned.
33397d19 1634
0bcb2a0e
PH
163538. The dnslists ACL condition has been extended: it is now possible to supply
1636 a list of IP addresses and/or domains to be looked up in a particular DNS
1637 domain.
1638
2ac0e484
PH
163939. Added log_selector=+queue_time_overall.
1640
4e1fde53
PH
164140. When running the queue in the test harness, wait just a tad after forking a
1642 delivery process, to get repeatability of debugging output.
1643
de365ded
PH
164441. Include certificate and key file names in error message when GnuTLS fails
1645 to set them up, because the GnuTLS error message doesn't include the name
1646 of the failing file when there is a problem reading it.
1647
f05da2e8
PH
164842. Allow both -bf and -bF in the same test run.
1649
d6453af2
PH
165043. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1651
f7b63901
PH
165244. The "Exiscan patch" is now merged into the mainline Exim source.
1653
165445. Sometimes the final signoff response after QUIT could fail to get
1655 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1656 < 0 before doing a fflush(). This bug looks as though it goes back to the
1657 introduction of TLS in release 3.20, but "sometimes" must have been rare
1658 because the tests only now provoked it.
1659
a444213a
PH
166046. Reset the locale to "C" after calling embedded Perl, in case it was changed
1661 (this can affect the format of dates).
1662
0ec020ea
PH
166347. exim_tidydb, when checking for the continued existence of a message for
1664 which it has found a message-specific retry record, was not finding
1665 messages that were in split spool directories. Consequently, it was
1666 deleting retry records that should have stayed in existence.
1667
b1206957
PH
166848. Steve fixed some bugs in eximstats.
1669
167049. The SPA authentication driver was not abandoning authentication and moving
1671 on to the next authenticator when an expansion was forced to fail,
1672 contradicting the general specification for all authenticators. Instead it
1673 was generating a temporary error. It now behaves as specified.
1674
26dd5a95
PH
167550. The default ordering of permitted cipher suites for GnuTLS was pessimal
1676 (the order specifies the preference for clients). The order is now AES256,
1677 AES128, 3DES, ARCFOUR128.
1678
343b2385
PH
167951. Small patch to Sieve code - explicitly set From: when generating an
1680 autoreply.
1681
1c5466b9
PH
168252. Exim crashed if a remote delivery caused a very long error message to be
1683 recorded - for instance if somebody sent an entire SpamAssassin report back
1684 as a large number of 550 error lines. This bug was coincidentally fixed by
1685 increasing the size of one of Exim's internal buffers (big_buffer) that
1686 happened as part of the Exiscan merge. However, to be on the safe side, I
1687 have made the code more robust (and fixed the comments that describe what
1688 is going on).
1689
55ee9ee3
PH
169053. Now that there can be additional text after "Completed" in log lines (if
1691 the queue_time_overall log selector is set), a one-byte patch to exigrep
1692 was needed to allow it to recognize "Completed" as not the last thing in
1693 the line.
1694
d38f8232
PH
169554. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1696 patch that reportedly fixes this has been added. I am not expert enough to
1697 create a test for it. This is what the patch creator wrote:
1698
1699 "I found a little strange behaviour of ldap code when working with
1700 Windows 2003 AD Domain, where users was placed in more than one
1701 Organization Units. When I tried to give exim partial DN, the exit code
1702 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1703 But simultaneously result of request was absolutely normal ldap result,
1704 so I produce this patch..."
1705
3295e65b
PH
1706 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1707 REFERENCE, so I have modified the code to exclude the patch when that macro
1708 is not defined.
1709
7102e136
PH
171055. Some experimental protocols are using DNS PTR records for new purposes. The
1711 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1712 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1713 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1714 CAN-2005-0021
7102e136 1715
3ca0ba97
PH
171656. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1717
c2bcbe20
PH
171857. Double the size of the debug message buffer (to 2048) so that more of very
1719 long debug lines gets shown.
1720
18ce445d
PH
172158. The exicyclog utility now does better if the number of log files to keep
1722 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1723
1f5b4c3d
PH
172459. Two changes related to the smtp_active_hostname option:
1725
1726 (1) $smtp_active_hostname is now available as a variable.
1727 (2) The default for smtp_banner uses $smtp_active_hostname instead
1728 of $primary_hostname.
1729
b975ba52
PH
173060. The host_aton() function is supposed to be passed a string that is known
1731 to be a valid IP address. However, in the case of IPv6 addresses, it was
1732 not checking this. This is a hostage to fortune. Exim now panics and dies
1733 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1734 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1735 components; fortuitously, this particular loophole had already been fixed
1736 by change 4.50/55 above.
1737
1738 If there are any other similar loopholes, the new check in host_aton()
1739 itself should stop them being exploited. The report I received stated that
1740 data on the command line could provoke the exploit when Exim was running as
1741 exim, but did not say which command line option was involved. All I could
1742 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1743 running as the user.
ea3a6f44 1744 CAN-2005-0021
85b87bc2
PH
1745
174661. There was a buffer overflow vulnerability in the SPA authentication code
1747 (which came originally from the Samba project). I have added a test to the
1748 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1749 CAN-2005-0022
b975ba52 1750
17ffcae7
PH
175162. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1752 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1753
d95f9fdb
PH
175463. The daemon start-up calls getloadavg() while still root for those OS that
1755 need the first call to be done as root, but it missed one case: when
1756 deliver_queue_load_max is set with deliver_drop_privilege. This is
1757 necessary for the benefit of the queue runner, because there is no re-exec
1758 when deliver_drop_privilege is set.
1759
86b8287f
PH
176064. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1761 This has been fixed.
1762
60dc5e56
PH
176365. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1764 was in use, was not putting the data itself into the right store pool;
1765 consequently, it could be overwritten for a subsequent message in the same
1766 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1767 the caching.)
1768
533244af
PH
176966. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1770
a5a28604
PH
177167. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1772 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1773 the function were treating the return as a boolean value, which happened to
1774 work because 0=false and not-0=true, but is not correct code.
1775
7e634d24
PH
177668. The host_aton() function was not handling scoped IPv6 addresses (those
1777 with, for example, "%eth0" on the end) correctly.
1778
3e11c26b
PH
177969. Fixed some compiler warnings in acl.c for the bitmaps specified with
1780 negated items (that is, ~something) in unsigned ints. Some compilers
1781 apparently mutter when there is no cast.
1782
6729cf78
PH
178370. If an address verification called from an ACL failed, and did not produce a
1784 user-specific message (i.e. there was only a "system" message), nothing was
1785 put in $acl_verify_message. In this situation, it now puts the system
1786 message there.
1787
00f00ca5
PH
178871. Change 4.23/11 added synchronization checking at the start of an SMTP
1789 session; change 4.31/43 added the unwanted input to the log line - except
1790 that it did not do this in the start of session case. It now does.
1791
c9bdd01c
PH
179272. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1793 This is wrong and can cause the other end to generate a synchronization
1794 error if it is another Exim or anything else that does the synchronization
1795 check. A QUIT command is no longer sent after a timeout.
1796
d43194df
PH
179773. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1798 during host lookups.
1799
fe5b5d0b
PH
180074. The defer_ok option of callout verification was not working if it was used
1801 when verifying addresses in header lines, that is, for this case:
1802
1803 verify = header_sender/callout=defer_ok
1804
76a2d7ba
PH
180575. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1806 those file descriptors could be used for SMTP connections. If anything
1807 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1808 could be sent to the SMTP client, causing chaos. The daemon now opens
1809 stdin, stdout, and stderr to /dev/null when it puts itself into the
1810 background.
1811
181276. Arrange for output from Perl's "warn" command to be written to Exim's main
1813 log by default. The user can override this with suitable Perl magic.
1814
04f7d5b9
PH
181577. The use of log_message on a "discard" ACL verb, which is supposed to add to
1816 the log message when discard triggers, was not working for the DATA ACL or
1817 for the non-SMTP ACL.
1818
bc60667e
PH
181978. Error message wording change in sieve.c.
1820
bb6e88ff
PH
182179. If smtp_accept_max_per_host was set, the number of connections could be
1822 restricted to fewer than expected, because the daemon was trying to set up
1823 a new connection before checking whether the processes handling previous
1824 connections had finished. The check for completed processes is now done
1825 earlier. On busy systems, this bug wouldn't be noticed because something
1826 else would have woken the daemon, and it would have reaped the completed
1827 process earlier.
1828
1e70f85b
PH
182980. If a message was submitted locally by a user whose login name contained one
1830 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1831 It caused a spool format error. I have fixed the spool reading code. A
1832 related problem was that the "from" clause in the Received: line became
1833 illegal because of the space(s). It is now covered by ${quote_local_part.
1834
183581. Included the latest eximstats from Steve (adds average sizes to HTML Top
1836 tables).
1837
4e01f9d6
PH
183882. Updated OS/Makefile-AIX as per message from Mike Meredith.
1839
1ee1cef2
PH
184083. Patch from Sieve maintainer to fix unterminated string problem in
1841 "vacation" handling.
1842
6e2b4ccc
PH
184384. Some minor changes to the Linux configuration files to help with other
1844 OS variants using glibc.
1845
8e669ac1
PH
184685. One more patch for Sieve to update vacation handling to latest spec.
1847
495ae4b0 1848
bbe902f0
PH
1849----------------------------------------------------
1850See the note above about the 4.44 and 4.50 releases.
1851----------------------------------------------------
1852
1853
1854Exim version 4.44
1855-----------------
1856
1857 1. Change 4.43/35 introduced a bug that caused file counts to be
1858 incorrectly computed when quota_filecount was set in an appendfile
1859 transport
1860
1861 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1862 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1863 place.
1864
1865 3. Give more explanation in the error message when the command for a transport
1866 filter fails to execute.
1867
1868 4. There are several places where Exim runs a non-Exim command in a
1869 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1870 was being done only for the command run by the queryprogram router. It is
1871 now done for all such subprocesses. The other cases are: ${run, transport
1872 filters, and the commands run by the lmtp and pipe transports.
1873
1874 5. Some older OS have a limit of 256 on the maximum number of file
1875 descriptors. Exim was using setrlimit() to set 1000 as a large value
1876 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1877 systems. I've change it so that if it can't get 1000, it tries for 256.
1878
1879 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1880 was an oversight, and furthermore, ever since the addition of extra
1881 controls (e.g. 4.43/32), the checks on when to allow different forms of
1882 "control" were broken. There should now be diagnostics for all cases when a
1883 control that does not make sense is encountered.
1884
1885 7. $recipients is now available in the predata ACL (oversight).
1886
1887 8. Tidy the search cache before the fork to do a delivery from a message
1888 received from the command line. Otherwise the child will trigger a lookup
1889 failure and thereby defer the delivery if it tries to use (for example) a
1890 cached ldap connection that the parent has called unbind on.
1891
1892 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1893 of $address_data from the recipient verification was clobbered by the
1894 sender verification.
1895
189610. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1897 was its contents. (It was OK if the option was not defined at all.)
1898
189911. A "Completed" log line is now written for messages that are removed from
1900 the spool by the -Mrm option.
1901
190212. $host_address is now set to the target address during the checking of
1903 ignore_target_hosts.
1904
190513. When checking ignore_target_hosts for an ipliteral router, no host name was
1906 being passed; this would have caused $sender_host_name to have been used if
1907 matching the list had actually called for a host name (not very likely,
1908 since this list is usually IP addresses). A host name is now passed as
1909 "[x.x.x.x]".
1910
191114. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1912 code that specifies a non-restarting handler (typically sigaction() in
1913 modern systems) in an attempt to fix a rare and obscure crash bug.
1914
191515. Narrowed the window for a race in the daemon that could cause it to ignore
1916 SIGCHLD signals. This is not a major problem, because they are used only to
1917 wake it up if nothing else does.
1918
191916. A malformed maildirsize file could cause Exim to calculate negative values
1920 for the mailbox size or file count. Odd effects could occur as a result.
1921 The maildirsize information is now recalculated if the size or filecount
1922 end up negative.
1923
192417. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1925 support for a long time. Removed HAVE_SYS_VFS_H.
1926
ea3a6f44 192718. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1928
192919. Allow an empty sender to be matched against a lookup in an address list.
1930 Previously the only cases considered were a regular expression, or an
1931 empty pattern.
1932
193320. Exim went into a mad DNS lookup loop when doing a callout where the
1934 host was specified on the transport, if the DNS lookup yielded more than
1935 one IP address.
1936
ea3a6f44
NM
193721. The RFC2047 encoding function was originally intended for short strings
1938 such as real names; it was not keeping to the 75-character limit for
1939 encoded words that the RFC imposes. It now respects the limit, and
1940 generates multiple encoded words if necessary. To be on the safe side, I
1941 have increased the buffer size for the ${rfc2047: expansion operator from
1942 1024 to 2048 bytes.
bbe902f0 1943
ea3a6f44
NM
194422. Failure to deliver a bounce message always caused it to be frozen, even if
1945 there was an errors_to setting on the router. The errors_to setting is now
1946 respected.
bbe902f0
PH
1947
194823. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1949 canonical form (fully expanded) before being placed in
1950 $sender_host_address.
1951
195224. Updated eximstats to version 1.33
1953
ea3a6f44
NM
195425. Include certificate and key file names in error message when GnuTLS fails
1955 to set them up, because the GnuTLS error message doesn't include the name
1956 of the failing file when there is a problem reading it.
bbe902f0
PH
1957
195826. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1959 As per change 25.
bbe902f0 1960
ea3a6f44
NM
196127. Reset the locale to "C" after calling embedded Perl, in case it was changed
1962 (this can affect the format of dates).
bbe902f0 1963
ea3a6f44
NM
196428. exim_tidydb, when checking for the continued existence of a message for
1965 which it has found a message-specific retry record, was not finding
1966 messages that were in split spool directories. Consequently, it was
1967 deleting retry records that should have stayed in existence.
bbe902f0
PH
1968
196929. eximstats updated to version 1.35
1970 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1971 1.35 - bugfix such that pie charts by volume are generated correctly
1972
ea3a6f44
NM
197330. The SPA authentication driver was not abandoning authentication and moving
1974 on to the next authenticator when an expansion was forced to fail,
1975 contradicting the general specification for all authenticators. Instead it
1976 was generating a temporary error. It now behaves as specified.
bbe902f0 1977
ea3a6f44
NM
197831. The default ordering of permitted cipher suites for GnuTLS was pessimal
1979 (the order specifies the preference for clients). The order is now AES256,
1980 AES128, 3DES, ARCFOUR128.
bbe902f0 1981
ea3a6f44
NM
198231. Small patch to Sieve code - explicitly set From: when generating an
1983 autoreply.
bbe902f0 1984
ea3a6f44
NM
198532. Exim crashed if a remote delivery caused a very long error message to be
1986 recorded - for instance if somebody sent an entire SpamAssassin report back
1987 as a large number of 550 error lines. This bug was coincidentally fixed by
1988 increasing the size of one of Exim's internal buffers (big_buffer) that
1989 happened as part of the Exiscan merge. However, to be on the safe side, I
1990 have made the code more robust (and fixed the comments that describe what
1991 is going on).
bbe902f0 1992
ea3a6f44
NM
199333. Some experimental protocols are using DNS PTR records for new purposes. The
1994 keys for these records are domain names, not reversed IP addresses. The
1995 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1996 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1997 CAN-2005-0021
1998
ea3a6f44
NM
199934. The host_aton() function is supposed to be passed a string that is known
2000 to be a valid IP address. However, in the case of IPv6 addresses, it was
2001 not checking this. This is a hostage to fortune. Exim now panics and dies
2002 if the condition is not met. A case was found where this could be provoked
2003 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2004 components; fortuitously, this particular loophole had already been fixed
2005 by change 4.50/55 or 4.44/33 above.
2006
2007 If there are any other similar loopholes, the new check in host_aton()
2008 itself should stop them being exploited. The report I received stated that
2009 data on the command line could provoke the exploit when Exim was running as
2010 exim, but did not say which command line option was involved. All I could
2011 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2012 running as the user.
bbe902f0
PH
2013 CAN-2005-0021
2014
ea3a6f44
NM
201535. There was a buffer overflow vulnerability in the SPA authentication code
2016 (which came originally from the Samba project). I have added a test to the
2017 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
2018 CAN-2005-0022
2019
ea3a6f44
NM
202036. The daemon start-up calls getloadavg() while still root for those OS that
2021 need the first call to be done as root, but it missed one case: when
2022 deliver_queue_load_max is set with deliver_drop_privilege. This is
2023 necessary for the benefit of the queue runner, because there is no re-exec
2024 when deliver_drop_privilege is set.
bbe902f0 2025
ea3a6f44
NM
202637. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2027 was in use, was not putting the data itself into the right store pool;
2028 consequently, it could be overwritten for a subsequent message in the same
2029 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2030 the caching.)
bbe902f0 2031
ea3a6f44
NM
203238. Sometimes the final signoff response after QUIT could fail to get
2033 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2034 < 0 before doing a fflush(). This bug looks as though it goes back to the
2035 introduction of TLS in release 3.20, but "sometimes" must have been rare
2036 because the tests only now provoked it.
bbe902f0
PH
2037
2038
495ae4b0
PH
2039Exim version 4.43
2040-----------------
2041
2042 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2043 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2044 Now it returns an integer. A number of calls were still expecting a T/F
2045 return. Fortuitously, in all cases, the tests worked in OK situations,
2046 which is the norm. However, things would have gone wrong on any write
2047 failures on the smtp file descriptor. This function is used when sending
2048 messages over SMTP and also when doing verify callouts.
2049
2050 2. When Exim is called to do synchronous delivery of a locally submitted
2051 message (the -odf or -odi options), it no longer closes stderr before doing
2052 the delivery.
2053
2054 3. Implemented the mua_wrapper option.
2055
2056 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2057
2058 5. Implemented the functions header_remove(), header_testname(),
2059 header_add_at_position(), and receive_remove_recipient(), and exported them
2060 to local_scan().
2061
2062 6. If an ACL "warn" statement specified the addition of headers, Exim already
2063 inserted X-ACL-Warn: at the start if there was no header name. However, it
2064 was not making this test for the second and subsequent header lines if
2065 there were newlines in the string. This meant that an invalid header could
2066 be inserted if Exim was badly configured.
2067
2068 7. Allow an ACL "warn" statement to add header lines at the start or after all
2069 the Received: headers, as well as at the end.
2070
2071 8. Added the rcpt_4xx retry error code.
2072
2073 9. Added postmaster_mailfrom=xxx to callout verification option.
2074
207510. Added mailfrom=xxxx to the callout verification option, for verify=
2076 header_sender only.
2077
207811. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2079 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2080
208112. Inserted some casts to stop certain compilers warning when using pointer
2082 differences as field lengths or precisions in printf-type calls (mostly
2083 affecting debugging statements).
2084
208513. Added optional readline() support for -be (dynamically loaded).
2086
208714. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2088 same clock tick as a message's arrival, so that its received time was the
2089 same as the "first fail" time on the retry record, and that message
2090 remained on the queue past the ultimate address timeout, every queue runner
2091 would try a delivery (because it was past the ultimate address timeout) but
2092 after another failure, the ultimate address timeout, which should have then
2093 bounced the address, did not kick in. This was a "< instead of <=" error;
2094 in most cases the first failure would have been in the next clock tick
2095 after the received time, and all would be well.
2096
209715. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2098 being recognized when the domain list was tested by the match_domain
2099 condition in an expansion string.
2100
210116. Added the ${str2b64: operator.
2102
210317. Exim was always calling setrlimit() to set a large limit for the number of
2104 processes, without checking whether the existing limit was already
2105 adequate. (It did check for the limit on file descriptors.) Furthermore,
2106 errors from getrlimit() and setrlimit() were being ignored. Now they are
2107 logged to the main and panic logs, but Exim does carry on, to try to do its
2108 job under whatever limits there are.
2109
211018. Imported PCRE 5.0.
2111
211219. Trivial typo in log message " temporarily refused connection" (the leading
2113 space).
2114
211520. If the log selector return_path_on_delivery was set and an address was
2116 redirected to /dev/null, the delivery process crashed because it assumed
2117 that a return path would always be set for a "successful" delivery. In this
2118 case, the whole delivery is bypassed as an optimization, and therefore no
2119 return path is set.
2120
212121. Internal re-arrangement: the function for sending a challenge and reading
2122 a response while authentication was assuming a zero-terminated challenge
2123 string. It's now changed to take a pointer and a length, to allow for
2124 binary data in such strings.
2125
212622. Added the cyrus_sasl authenticator (code supplied by MBM).
2127
212823. Exim was not respecting finduser_retries when seeking the login of the
2129 uid under which it was called; it was always trying 10 times. (The default
2130 setting of finduser_retries is zero.) Also, it was sleeping after the final
2131 failure, which is pointless.
2132
213324. Implemented tls_on_connect_ports.
2134
213525. Implemented acl_smtp_predata.
2136
213726. If the domain in control=submission is set empty, Exim assumes that the
2138 authenticated id is a complete email address when it generates From: or
2139 Sender: header lines.
2140
214127. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2142 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2143 chown and chgrp in /bin and hostname in /usr/bin.
2144
214528. Exim was keeping the "process log" file open after each use, just as it
2146 does for the main log. This opens the possibility of it remaining open for
2147 long periods when the USR1 signal hits a daemon. Occasional processlog
2148 errors were reported, that could have been caused by this. Anyway, it seems
2149 much more sensible not to leave this file open at all, so that is what now
2150 happens.
2151
215229. The long-running daemon process does not normally write to the log once it
2153 has entered its main loop, and it closes the log before doing so. This is
2154 so that log files can straightforwardly be renamed and moved. However,
2155 there are a couple of unusual error situations where the daemon does write
2156 log entries, and I had neglected to close the log afterwards.
2157
215830. The text of an SMTP error response that was received during a remote
2159 delivery was being truncated at 512 bytes. This is too short for some of
2160 the long messages that one sometimes sees. I've increased the limit to
2161 1024.
2162
216331. It is now possible to make retry rules that apply only when a message has a
2164 specific sender, in particular, an empty sender.
2165
216632. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2167 it possible to be selective about when SMTP synchronization is enforced.
2168
216933. Added "control = caseful_local_part" and "control = "caselower_local_part".
2170
217132. Implemented hosts_connection_nolog.
2172
217333. Added an ACL for QUIT.
2174
217534. Setting "delay_warning=" to disable warnings was not working; it gave a
2176 syntax error.
2177
217835. Added mailbox_size and mailbox_filecount to appendfile.
2179
218036. Added control = no_multiline_responses to ACLs.
2181
218237. There was a bug in the logic of the code that waits for the clock to tick
2183 in the case where the clock went backwards by a substantial amount such
2184 that the microsecond fraction of "now" was more than the microsecond
2185 fraction of "then" (but the whole seconds number was less).
2186
218738. Added support for the libradius Radius client library this is found on
2188 FreeBSD (previously only the radiusclient library was supported).
2189
2190
2191Exim version 4.42
2192-----------------
2193
2194 1. When certain lookups returned multiple values in the form name=value, the
2195 quoting of the values was not always being done properly. Specifically:
2196 (a) If the value started with a double quote, but contained no whitespace,
2197 it was not quoted.
2198 (b) If the value contained whitespace other than a space character (i.e.
2199 tabs or newlines or carriage returns) it was not quoted.
2200 This fix has been applied to the mysql and pgsql lookups by writing a
2201 separate quoting function and calling it from the lookup code. The fix
2202 should probably also be applied to nisplus, ibase and oracle lookups, but
2203 since I cannot test any of those, I have not disturbed their existing code.
2204
2205 2. A hit in the callout cache for a specific address caused a log line with no
2206 reason for rejecting RCPT. Now it says "Previous (cached) callout
2207 verification failure".
2208
2209 3. There was an off-by-one bug in the queryprogram router. An over-long
2210 return line was truncated at 256 instead of 255 characters, thereby
2211 overflowing its buffer with the terminating zero. As well as fixing this, I
2212 have increased the buffer size to 1024 (and made a note to document this).
2213
2214 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2215 when Exim is waiting for an SMTP response from a remote server, Exim
2216 restarts its select() call on the socket, thereby resetting its timeout.
2217 This is not a problem when such interrupts are rare. Somebody set up a cron
2218 job to run exiwhat every 2 minutes, which is less than the normal select()
2219 timeout (5 or 10 minutes). This meant that the select() timeout never
2220 kicked in because it was always reset. I have fixed this by comparing the
2221 time when an interrupt arrives with the time at the start of the first call
2222 to select(). If more time than the timeout has elapsed, the interrupt is
2223 treated as a timeout.
2224
2225 5. Some internal re-factoring in preparation for the addition of Sieve
2226 extensions (by MH). In particular, the "personal" test is moved to a
2227 separate function, and given an option for scanning Cc: and Bcc: (which is
2228 not set for Exim filters).
2229
2230 6. When Exim created an email address using the login of the caller as the
2231 local part (e.g. when creating a From: or Sender: header line), it was not
2232 quoting the local part when it contained special characters such as @.
2233
2234 7. Installed new OpenBSD configuration files.
2235
2236 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2237 try to make them clearer.
2238
2239 9. Callout options, other than the timeout value, were being ignored when
2240 verifying sender addresses in header lines. For example, when using
2241
2242 verify = header_sender/callout=no_cache
2243
2244 the cache was (incorrectly) being used.
2245
224610. Added a missing instance of ${EXE} to the exim_install script; this affects
2247 only the Cygwin environment.
2248
224911. When return_path_on_delivery was set as a log selector, if different remote
2250 addresses in the same message used different return paths and parallel
2251 remote delivery occurred, the wrong values would sometimes be logged.
2252 (Whenever a remote delivery process finished, the return path value from
2253 the most recently started remote delivery process was logged.)
2254
225512. RFC 3848 specifies standard names for the "with" phrase in Received: header
2256 lines when AUTH and/or TLS are in use. This is the "received protocol"
2257 field. Exim used to use "asmtp" for authenticated SMTP, without any
2258 indication (in the protocol name) for TLS use. Now it follows the RFC and
2259 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2260 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2261 names appear in log lines as well as in Received: header lines.
2262
226313. Installed MH's patches for Sieve to add the "copy" and "vacation"
2264 extensions, and comparison tests, and to fix some bugs.
2265
226614. Changes to the "personal" filter test:
2267
2268 (1) The test was buggy in that it was just doing the equivalent of
2269 "contains" tests on header lines. For example, if a user's address was
2270 anne@some.where, the "personal" test would incorrectly be true for
2271
2272 To: susanne@some.where
2273
2274 This test is now done by extracting each address from the header in turn,
2275 and checking the entire address. Other tests that are part of "personal"
2276 are now done using regular expressions (for example, to check local parts
2277 of addresses in From: header lines).
2278
2279 (2) The list of non-personal local parts in From: addresses has been
2280 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2281 taken from the Sieve specification recommendations.
2282
2283 (3) If the message contains any header line starting with "List-" it is
2284 treated as non-personal.
2285
2286 (4) The test for "circular" in the Subject: header line has been removed
2287 because it now seems ill-conceived.
2288
228915. Minor typos in src/EDITME comments corrected.
2290
229116. Installed latest exipick from John Jetmore.
2292
229317. If headers_add on a router specified a text string that was too long for
2294 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2295 of string_sprintf() is now avoided.
2296
229718. $message_body_size was not set (it was always zero) when running the DATA
2298 ACL and the local_scan() function.
2299
230019. For the "mail" command in an Exim filter, no default was being set for
2301 the once_repeat time, causing a random time value to be used if "once" was
2302 specified. (If the value happened to be <= 0, no repeat happened.) The
2303 default is now 0s, meaning "never repeat". The "vacation" command was OK
2304 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2305 (I found it when inspecting the code).
2306
230720. There is now an overall timeout for performing a callout verification. It
2308 defaults to 4 times the callout timeout, which applies to individual SMTP
2309 commands during the callout. The overall timeout applies when there is more
2310 than one host that can be tried. The timeout is checked before trying the
2311 next host. This prevents very long delays if there are a large number of
2312 hosts and all are timing out (e.g. when the network connections are timing
2313 out). The value of the overall timeout can be changed by specifying an
2314 additional sub-option for "callout", called "maxwait". For example:
2315
2316 verify = sender/callout=5s,maxwait=20s
2317
231821. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2319 to the end before writing, but this should make it even safer).
2320
232122. Exim was forgetting that it had advertised PIPELINING for the second and
2322 subsequent messages on an SMTP connection. It was also not resetting its
2323 memory on STARTTLS and an internal HELO.
2324
232523. When Exim logs an SMTP synchronization error within a session, it now
2326 records whether PIPELINING has been advertised or not.
2327
232824. Added 3 instances of "(long int)" casts to time_t variables that were being
2329 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2330 rather than long int.
2331
233225. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2333
233426. Added the never_mail option to autoreply.
2335
2336
2337Exim version 4.41
2338-----------------
2339
2340 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2341 crash if the getsockname() call failed; this can happen if a connection is
2342 closed very soon after it is established. The problem was simply in the
2343 order in which certain operations were done, causing Exim to try to write
2344 to the SMTP stream before it had set up the file descriptor. The bug has
2345 been fixed by making things happen in the correct order.
2346
2347
2348Exim version 4.40
2349-----------------
2350
2351 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2352 before the connection was closed, thus losing the rejection response.
2353
2354 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2355 some early Solaris releases, but causes trouble in current releases where
2356 socklen_t is defined.
2357
2358 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2359 always exist.
2360
2361 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2362 configured.
2363
2364 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2365 that releasing the top of it at the end releases what was used for sub-
2366 expansions (unless the block got too big). However, discard this block if
2367 the first thing is a variable or header, so that we can use its block when
2368 it is dynamic (useful for very large $message_headers, for example).
2369
2370 6. Lookups now cache *every* query, not just the most recent. A new, separate
2371 store pool is used for this. It can be recovered when all lookup caches are
2372 flushed. Lookups now release memory at the end of their result strings.
2373 This has involved some general refactoring of the lookup sources.
2374
2375 7. Some code has been added to the store_xxx() functions to reduce the amount
2376 of flapping under certain conditions.
2377
2378 8. log_incoming_interface used to affect only the <= reception log lines. Now
2379 it causes the local interface and port to be added to several more SMTP log
2380 lines, for example "SMTP connection from", and rejection lines.
2381
2382 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2383
238410. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2385
238611. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2387 could be overwritten at the end of the current message (or the start of a
2388 new message if it was set in a HELO ACL). The value is now preserved for
2389 the duration of the SMTP connection.
2390
239112. If a transport had a headers_rewrite setting, and a matching header line
2392 contained an unqualified address, that address was qualified, even if it
2393 did not match any rewriting rules. The underlying bug was that the values
2394 of the flags that permit the existence of unqualified sender and recipient
2395 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2396 non-local messages, and by -bnq for local messages) were not being
2397 preserved with the message after it was received.
2398
239913. When Exim was logging an SMTP synchronization error, it could sometimes log
2400 "next input=" as part of the text comprising the host identity instead of
2401 the correct text. The code was using the same buffer for two different
2402 strings. However, depending on which order the printing function evaluated
2403 its arguments, the bug did not always show up. Under Linux, for example, my
2404 test suite worked just fine.
2405
240614. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2407 doesn't work with some older versions of Perl. It has been changed to "my",
2408 which in any case is probably the better facility to use.
2409
241015. A really picky compiler found some instances of statements for creating
2411 error messages that either had too many or two few arguments for the format
2412 string.
2413
241416. The size of the buffer for calls to the DNS resolver has been increased
2415 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2416 for addresses that have a lot of PTR records. This alleviates a problem; it
2417 does not fully solve it.
2418
241917. A dnsdb lookup for PTR records that receives more data than will fit in the
2420 buffer now truncates the list and logs the incident, which is the same
2421 action as happens when Exim is looking up a host name and its aliases.
2422 Previously in this situation something unpredictable would happen;
2423 sometimes it was "internal error: store_reset failed".
2424
242518. If a server dropped the connection unexpectedly when an Exim client was
2426 using GnuTLS and trying to read a response, the client delivery process
2427 crashed while trying to generate an error log message.
2428
242919. If a "warn" verb in an ACL added multiple headers to a message in a single
2430 string, for example:
2431
2432 warn message = H1: something\nH2: something
2433
2434 the text was added as a single header line from Exim's point of view
2435 though it ended up OK in the delivered message. However, searching for the
2436 second and subsequent header lines using $h_h2: did not work. This has been
2437 fixed. Similarly, if a system filter added multiple headers in this way,
2438 the routers could not see them.
2439
244020. Expanded the error message when iplsearch is called with an invalid key to
2441 suggest using net-iplsearch in a host list.
2442
244321. When running tests using -bh, any delays imposed by "delay" modifiers in
2444 ACLs are no longer actually imposed (and a message to that effect is
2445 output).
2446
244722. If a "gecos" field in a passwd entry contained escaped characters, in
2448 particular, if it contained a \" sequence, Exim got it wrong when building
2449 a From: or a Sender: header from that name. A second bug also caused
2450 incorrect handling when an unquoted " was present following a character
2451 that needed quoting.
2452
245323. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2454 was not being matched caselessly.
2455
245624. Arranged for all hyphens in the exim.8 source to be escaped with
2457 backslashes.
2458
245925. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2460 properly. Recipient callout cache records were still being keyed to include
2461 the sender, even when use_sender was set false. This led to far more
2462 callouts that were necessary. The sender is no longer included in the key
2463 when use_sender is false.
2464
246526. Added "control = submission" modifier to ACLs.
2466
246727. Added the ${base62d: operator to decode base 62 numbers.
2468
246928. dnsdb lookups can now access SRV records.
2470
247129. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2472 the configuration file.
2473
247430. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2475 (-v) mode. This makes the output for a verbose queue run more intelligible.
2476
247731. Added a use_postmaster feature to recipient callouts.
2478
247932. Added the $body_zerocount variable, containing the number of binary zero
2480 bytes in the message body.
2481
248233. The time of last modification of the "new" subdirectory is now used as the
2483 "mailbox time last read" when there is a quota error for a maildir
2484 delivery.
2485
248634. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2487
248835. Added +ignore_unknown as a special item in host lists.
2489
249036. Code for decoding IPv6 addresses in host lists is now included, even if
2491 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2492 address was recognized as an IP address, but was then not correctly decoded
2493 into binary, causing unexpected and incorrect effects when compared with
2494 another IP address.
2495
2496
2497Exim version 4.34
2498-----------------
2499
2500 1. Very minor rewording of debugging text in manualroute to say "list of
2501 hosts" instead of "hostlist".
2502
2503 2. If verify=header_syntax was set, and a header line with an unqualified
2504 address (no domain) and a large number of spaces between the end of the
2505 name and the colon was received, the reception process suffered a buffer
2506 overflow, and (when I tested it) crashed. This was caused by some obsolete
2507 code that should have been removed. The fix is to remove it!
2508
2509 3. When running in the test harness, delay a bit after writing a bounce
2510 message to get a bit more predictability in the log output.
2511
2512 4. Added a call to search_tidyup() just before forking a reception process. In
2513 theory, someone could use a lookup in the expansion of smtp_accept_max_
2514 per_host which, without the tidyup, could leave open a database connection.
2515
2516 5. Added the variables $recipient_data and $sender_data which get set from a
2517 lookup success in an ACL "recipients" or "senders" condition, or a router
2518 "senders" option, similar to $domain_data and $local_part_data.
2519
2520 6. Moved the writing of debug_print from before to after the "senders" test
2521 for routers.
2522
2523 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2524 problems for message scanning, either using a data ACL, or using
2525 local_scan() because the Received: header was not generated till after they
2526 were called (in order to set the time as the time of reception completion).
2527 I have revised the way this works. The header is now generated after the
2528 body is received, but before the ACL or local_scan() are called. After they
2529 are run, the timestamp in the header is updated.
2530
2531
2532Exim version 4.33
2533-----------------
2534
2535 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2536 before starting a queue runner without re-exec. This happened only when
2537 deliver_drop_privilege was set or when the Exim user was set to root. The
2538 effect of the bug was that timeouts during subsequent deliveries caused
2539 crashes instead of being properly handled. The handler is now left at its
2540 default (and expected) setting.
2541
2542 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2543 message, again when deliver_drop_privilege is set or Exim is run as root.
2544 The bug described in (1) was not present in this case, but the tidying up
2545 of the other signals was missing. I have made the two cases consistent.
2546
2547 3. The ignore_target_hosts setting on a manualroute router was being ignored
2548 for hosts that were looked up using the /MX notation.
2549
2550 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2551 in domain lists.
2552
2553 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2554 operated on the sender address. After changing the $sender_address to <>
2555 for the sender address verify, Exim was re-instated it as the original
2556 (before rewriting) address, but remembering that it had rewritten it, so it
2557 wasn't rewriting it again. This bug also had the effect of breaking the
2558 sender address verification caching when the sender address was rewritten.
2559
2560 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2561 This has been changed so that if the ip literal address matches
2562 ignore_target_hosts, the router declines.
2563
2564 7. Added expansion conditions match_domain, match_address, and match_local_
2565 part (NOT match_host).
2566
2567 8. The placeholder for the Received: header didn't have a length field set.
2568
2569 9. Added code to Exim itself and to exim_lock to test for a specific race
2570 condition that could lead to file corruption when using MBX delivery. The
2571 issue is with the lockfile that is created in /tmp. If this file is removed
2572 after a process has opened it but before that process has acquired a lock,
2573 there is the potential for a second process to recreate the file and also
2574 acquire a lock. This could lead to two Exim processes writing to the file
2575 at the same time. The added code performs the same test as UW imapd; it
2576 checks after acquiring the lock that its file descriptor still refers to
2577 the same named file.
2578
257910. The buffer for building added header lines was of fixed size, 8192 bytes.
2580 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2581 when Exim is built.
2582
258311. Added the smtp_active_hostname option. If used, this will typically be made
2584 to depend on the incoming interface address. Because $interface_address is
2585 not set up until the daemon has forked a reception process, error responses
2586 that can happen earlier (such as "too many connections") no longer contain
2587 a host name.
2588
258912. If an expansion in a condition on a "warn" statement fails because a lookup
2590 defers, the "warn" statement is abandoned, and the next ACL statement is
2591 processed. Previously this caused the whole ACL to be aborted.
2592
259313. Added the iplsearch lookup type.
2594
259514. Added ident_timeout as a log selector.
2596
259715. Added tls_certificate_verified as a log selector.
2598
259916. Added a global option tls_require_ciphers (compare the smtp transport
2600 option of the same name). This controls incoming TLS connections.
2601
260217. I finally figured out how to make tls_require_ciphers do a similar thing
2603 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2604 before starting the TLS session.
2605
260618. Tabs are now shown as \t in -bP output.
2607
260819. If the log selector return_path_on_delivery was set, Exim crashed when
2609 bouncing a message because it had too many Received: header lines.
2610
261120. If two routers both had headers_remove settings, and the first one included
2612 a superfluous trailing colon, the final name in the first list and the
2613 first name in the second list were incorrectly joined into one item (with a
2614 colon in the middle).
2615
2616
2617Exim version 4.32
2618-----------------
2619
2620 1. Added -C and -D options to the exinext utility, mainly to make it easier
2621 to include in the automated testing, but these could be helpful when
2622 multiple configurations are in use.
2623
2624 2. The exinext utility was not formatting the output nicely when there was
2625 an alternate port involved in the retry record key, nor when there was a
2626 message id as well (for retries that were specific to a specific message
2627 and a specific host). It was also confused by IPv6 addresses, because of
2628 the additional colons they contain. I have fixed the IPv4 problem, and
2629 patched it up to do a reasonable job for IPv6.
2630
2631 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2632 delivery, the log line now contains "pipelined" if PIPELINING was used.
2633
2634 4. An SMTP transport process used to panic and die if the bind() call to set
2635 an explicit outgoing interface failed. This has been changed; it is now
2636 treated in the same way as a connect() failure.
2637
2638 5. A reference to $sender_host_name in the part of a conditional expansion
2639 that was being skipped was still causing a DNS lookup. This no longer
2640 occurs.
2641
2642 6. The def: expansion condition was not recognizing references to header lines
2643 that used bh_ and bheader_.
2644
2645 7. Added the _cache feature to named lists.
2646
2647 8. The code for checking quota_filecount in the appendfile transport was
2648 allowing one more file than it should have been.
2649
2650 9. For compatibility with Sendmail, the command line option
2651
2652 -prval:sval
2653
2654 is equivalent to
2655
2656 -oMr rval -oMs sval
2657
2658 and sets the incoming protocol and host name (for trusted callers). The
2659 host name and its colon can be omitted when only the protocol is to be set.
2660 Note the Exim already has two private options, -pd and -ps, that refer to
2661 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2662 "s", but I don't think that's a major issue.
2663
266410. A number of refactoring changes to the code, none of which should affect
2665 Exim's behaviour:
2666
2667 (a) The number of logging options was getting close to filling up the
2668 32-bit word that was used as a bit map. I have split them into two classes:
2669 those that are passed in the argument to log_write(), and those that are
2670 only ever tested independently outside of that function. These are now in
2671 separate 32-bit words, so there is plenty of room for expansion again.
2672 There is no change in the user interface or the logging behaviour.
2673
2674 (b) When building, for example, log lines, the code previously used a
2675 macro that called string_cat() twice, in order to add two strings. This is
2676 not really sufficiently general. Furthermore, there was one instance where
2677 it was actually wrong because one of the argument was used twice, and in
2678 one call a function was used. (As it happened, calling the function twice
2679 did not affect the overall behaviour.) The macro has been replaced by a
2680 function that can join an arbitrary number of extra strings onto a growing
2681 string.
2682
2683 (c) The code for expansion conditions now uses a table and a binary chop
2684 instead of a serial search (which was left over from when there were very
2685 few conditions). Also, it now recognizes conditions like "pam" even when
2686 the relevant support is not compiled in: a suitably worded error message is
2687 given if an attempt is made to use such a condition.
2688
268911. Added ${time_interval:xxxxx}.
2690
269112. A bug was causing one of the ddress fields not to be passed back correctly
2692 from remote delivery subprocesses. The field in question was not being
2693 subsequently used, so this caused to problems in practice.
2694
269513. Added new log selectors queue_time and deliver_time.
2696
269714. Might have fixed a bug in maildirsizefile handling that threw up
2698 "unexpected character" debug warnings, and recalculated the data
2699 unnecessarily. In any case, I expanded the warning message to give more
2700 information.
2701
270215. Added the message "Restricted characters in address" to the statements in
2703 the default ACL that block characters like @ and % in local parts.
2704
270516. Change 71 for release 4.31 proved to be much less benign that I imagined.
2706 Three changes have been made:
2707
2708 (a) There was a serious bug; a negative response to MAIL caused the whole
2709 recipient domain to be cached as invalid, thereby blocking all messages
2710 to all local parts at the same domain, from all senders. This bug has
2711 been fixed. The domain is no longer cached after a negative response to
2712 MAIL if the sender used is not empty.
2713
2714 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2715 been restored.
2716
2717 (c) A new callout option, "use_sender" has been added for people who want
2718 the modified behaviour.
2719
2720
2721Exim version 4.31
2722-----------------
2723
2724 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2725 Larry Rosenman.
2726
2727 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2728 indeed breaks things for older releases.
2729
2730 3. Added additional logging to the case where there is a problem reading data
2731 from a filter that is running in a subprocess using a pipe, in order to
2732 try to track down a specific problem.
2733
2734 4. Testing facility fudge: when running in the test harness and attempting
2735 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2736 getting "No route to host". Convert this to a timeout.
2737
2738 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2739 warning.
2740
2741 6. Some OS don't have socklen_t but use size_t instead. This affects the
2742 fifth argument of getsockopt() amongst other things. This is now
2743 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2744 can be set for individual OS. I have set it for SunOS5, OSF1, and
2745 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2746 some earlier ones do not.
2747
2748 7. Change 4.30/15 was not doing the test caselessly.
2749
2750 8. The standard form for an IPv6 address literal was being rejected by address
2751 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2752 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2753 this, as well as the form without the "IPv6" on the front (but only when
2754 address literals are enabled, of course).
2755
2756 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2757
275810. Exim crashed if a message with an empty sender address specified by -f
2759 encountered a router with an errors_to setting. This could be provoked only
2760 by a command such as
2761
2762 exim -f "" ...
2763
2764 where an empty string was supplied; "<>" did not hit this bug.
2765
276611. Installed PCRE release 4.5.
2767
276812. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2769 remained set. It is now erased.
2770
277113. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2772 times from message ids (which are base 36 rather than the normal 62).
2773
277414. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2775 were being counted as actual protocol errors, and logged if the log
2776 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2777 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2778 and DATA following a set of rejected RCPTs do not count as protocol errors.
2779 In other words, Exim assumes they were pipelined, though this may not
2780 actually be the case. Of course, in all cases the client gets an
2781 appropriate error code.
2782
278315. If a lookup fails in an ACL condition, a message about the failure may
2784 be available; it is used if testing the ACL cannot continue, because most
2785 such messages specify what the cause of the deferral is. However, some
2786 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2787 that caused an old message to be retained and used if a later statement
2788 caused a defer, replacing the real cause of the deferral.
2789
279016. If an IP address had so many PTR records that the DNS lookup buffer
2791 was not large enough to hold them, Exim could crash while trying to process
2792 the truncated data. It now detects and logs this case.
2793
279417. Further to 4.21/58, another change has been made: if (and only if) the
2795 first line of a message (the first header line) ends with CRLF, a bare LF
2796 in a subsequent header line has a space inserted after it, so as not to
2797 terminate the header.
2798
279918. Refactoring: tidied an ugly bit of code in appendfile that copied data
2800 unnecessarily, used atoi() instead of strtol(), and didn't check the
2801 termination when getting file sizes from file names by regex.
2802
280319. Completely re-implemented the support for maildirsize files, in the light
2804 of a number of problems with the previous contributed implementation
2805 (4.30/29). In particular:
2806
2807 . If the quota is zero, the maildirsize file is maintained, but no quota is
2808 imposed.
2809
2810 . If the maildir directory does not exist, it is created before any attempt
2811 to write a maildirsize file.
2812
2813 . The quota value in the file is just a cache; if the quota is changed in
2814 the transport, the new value overrides.
2815
2816 . A regular expression is available for excluding directories from the
2817 count.
2818
281920. The autoreply transport checks the characters in options that define the
2820 message's headers; it allows continued headers, but it was checking with
2821 isspace() after an embedded newline instead of explicitly looking for a
2822 space or a tab.
2823
282421. If all the "regular" hosts to which an address was routed had passed their
2825 expiry times, and had not reached their retry times, the address was
2826 bounced, even if fallback hosts were defined. Now Exim should go on to try
2827 the fallback hosts.
2828
282922. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2830 equivalent code in the SMTP transport. Some hosts send humungous responses
2831 to HELO/EHLO, more than 1024 it seems.
2832
283323. Refactoring: code in filter.c used (void *) for "any old type" but this
2834 gives compiler warnings in some environments. I've now done it "properly",
2835 using a union.
2836
283724. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2838 (because of problems with the built-in one) was declared to return uschar *
2839 instead of char *, causing compiler failure.
2840
284125. Fixed a file descriptor leak when processing alias/forward files.
2842
284326. Fixed a minor format string issue in dbfn.c.
2844
284527. Typo in exim.c: ("dmbnz" for "dbmnz").
2846
284728. If a filter file refered to $h_xxx or $message_headers, and the headers
2848 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2849 become corrupted.
2850
285129. When a sender address is verified, it is cached, to save repeating the test
2852 when there is more than one recipient in a message. However, when the
2853 verification involves a callout, it is possible for different callout
2854 options to be set for different recipients. It is too complicated to keep
2855 track of this in the cache, so now Exim always runs a verification when a
2856 callout is required, relying on the callout cache for the optimization.
2857 The overhead is duplication of the address routing, but this should not be
2858 too great.
2859
286030. Fixed a bug in callout caching. If a RCPT command caused the sender address
2861 to be verified with callout=postmaster, and the main callout worked but the
2862 postmaster check failed, the verification correctly failed. However, if a
2863 subsequent RCPT command asked for sender verification *without* the
2864 postmaster check, incorrect caching caused this verification also to fail,
2865 incorrectly.
2866
286731. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2868 it was not caching the DNS options (qualify_single, search_parents) that
2869 were used when the lookup failed. A subsequent lookup with different
2870 options therefore always gave the same answer, though there were cases
2871 where it should not have. (Example: a "domains = !$mx_any" option on a
2872 dnslookup router: the "domains" option is always processed without any
2873 widening, but the router might have qualify_single set.) Now Exim uses the
2874 cached value only when the same options are set.
2875
287632. Added John Jetmore's "exipick" utility to the distribution.
2877
287833. GnuTLS: When an attempt to start a TLS session fails for any reason other
2879 than a timeout (e.g. a certificate is required, and is not provided), an
2880 Exim server now closes the connection immediately. Previously it waited for
2881 the client to close - but if the client is SSL, it seems that they each
2882 wait for each other, leading to a delay before one of them times out.
2883
288434: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2885 maintained 0.8.x compatibility because I don't think many are using it, and
2886 it is clearly obsolete.
2887
288835. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2889 transport.
2890
289136. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2892 client certificate was expired. A simple patch fixes this, though I don't
2893 understand the full logic of why the verify callback is called multiple
2894 times.
2895
289637. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2897 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2898 which causes problems with some clients (such as the Certicom SSL Plus
2899 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2900 disables the coutermeasure allowing Eudora to connect."
2901
290238. Exim was not checking that a write() to a log file succeeded. This could
2903 lead to Bad Things if a log got too big, in particular if it hit a file
2904 size limit. Exim now panics and dies if it cannot write to a log file, just
2905 as it does if it cannot open a log file.
2906
290739. Modified OS/Makefile-Linux so that it now contains
2908
2909 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2910
2911 The two -D definitions ensure that Exim is compiled with large file
2912 support, which makes it possible to handle log files that are bigger than
2913 2^31.
2914
291540. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2916 instance) a domain was checked against a named list that involved a lookup,
2917 causing $domain_data to be set, then another domain was checked against the
2918 same list, then the first domain was re-checked, the value of $domain_data
2919 after the final check could be wrong. In particular, if the second check
2920 failed, it could be set empty. This bug probably also applied to
2921 $localpart_data.
2922
292341. The strip_trailing_dot option was not being applied to the address given
2924 with the -f command-line option.
2925
292642. The code for reading a message's header from the spool was incrementing
2927 $received_count, but never initializing it. This meant that the value was
2928 incorrect (doubled) while delivering a message in the same process in which
2929 it was received. In the most common configuration of Exim, this never
2930 happens - a fresh exec is done - but it can happen when
2931 deliver_drop_privilege is set.
2932
293343. When Exim logs an SMTP synchronization error - client data sent too soon -
2934 it now includes up to 150 characters of the unexpected data in the log
2935 line.
2936
293744. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2938 and building data strings. The size of both of these buffers was 10 000
2939 bytes - far larger than anybody would *ever* want, thought I. Needless to
2940 say, somebody hit the limit. I have increased the maximum line length to
2941 20 000 and the maximum data length of concatenated lines to 100 000. I have
2942 also fixed two bugs, because there was no checking on these buffers. Tsk,
2943 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2944 buffer is too small.
2945
294645. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2947 lsearch lookups. Now it does.
2948
294946. When parsing a route_list item in a manualroute router, a fixed-length
2950 buffer was used for the list of hosts. I made this 1024 bytes long,
2951 thinking that nobody would ever have a list of hosts that long. Wrong.
2952 Somebody had a whole pile of complicated expansion conditions, and the
2953 string was silently truncated, leading to an expansion error. It turns out
2954 that it is easier to change to an unlimited length (owing to other changes
2955 that have happened since this code was originally written) than to build
2956 structure for giving a limitation error. The length of the item that
2957 expands into the list of hosts is now unlimited.
2958
295947. The lsearch lookup could not handle data where the length of text line was
2960 more than 4095 characters. Such lines were truncated, leading to shortened
2961 data being returned. It should now handle lines of any length.
2962
296348. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2964 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2965 ACL").
2966
296749. Cosmetic tidy to scripts like exicyclog that are generated by globally
2968 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2969 no longer happens in comment lines. A list of replacements is now placed
2970 at the head of all of the source files, except those whose only change is
2971 to replace PERL_COMMAND in the very first #! line.
2972
297350. Replaced the slow insertion sort in queue.c, for sorting the list of
2974 messages on the queue, with a bottom-up merge sort, using code contributed
2975 by Michael Haardt. This should make operations like -bp somewhat faster on
2976 large queues. It won't affect queue runners, except when queue_run_in_order
2977 is set.
2978
297951. Installed eximstats 1.31 in the distribution.
2980
298152. Added support for SRV lookups to the dnslookup router.
2982
298353. If an ACL referred to $message_body or $message_body_end, the value was not
2984 reset for any messages that followed in the same SMTP session.
2985
298654. The store-handling optimization for building very long strings was not
2987 differentiating between the different store pools. I don't think this
2988 actually made any difference in practice, but I've tidied it.
2989
299055. While running the routers to verify a sender address, $sender_address
2991 was still set to the sender address. This is wrong, because when routing to
2992 send a bounce to the sender, it would be empty. Therefore, I have changed
2993 it so that, while verifying a sender address, $sender_address is set to <>.
2994 (There is no change to what happens when verifying a recipient address.)
2995
299656. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2997 target A or AAAA records (if not already returned) without resetting the
2998 qualify_single or search_parents options of the DNS resolver. These are
2999 inappropriate in this case because the targets of MX and SRV records must
3000 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3001 target that, when qualified, matched something in the local domain. These
3002 two options are now turned off when doing these lookups.
3003
300457. It seems that at least some releases of Reiserfs (which does not have the
3005 concept of a fixed number of inodes) returns zero and not -1 for the
3006 number of available inodes. This interacted badly with check_spool_inodes,
3007 which assumed that -1 was the "no such thing" setting. What I have done is
3008 to check that the total number of inodes is greater than zero before doing
3009 the test of how many are available.
3010
301158. When a "warn" ACL statement has a log_message modifier, the message is
3012 remembered, and not repeated. This is to avoid a lot of repetition when a
3013 message has many recipients that cause the same warning to be written.
3014 Howewer, Exim was preserving the list of already written lines for an
3015 entire SMTP session, which doesn't seem right. The memory is now reset if a
3016 new message is started.
3017
301859. The "rewrite" debugging flag was not showing the result of rewriting in the
3019 debugging output unless log_rewrite was also set.
3020
302160. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3022 of (int)(handle) when we know that handle contains (void *)(-1).
3023
302461. The Exim daemon panic-logs an error return when it closes the incoming
3025 connection. However "connection reset by peer" seems to be common, and
3026 isn't really an error worthy of noting specially, so that particular error
3027 is no long logged.
3028
302962. When Exim is trying to find all the local interfaces, it used to panic and
3030 die if the ioctl to get the interface flags failed. However, it seems that
3031 on at least one OS (Solaris 9) it is possible to have an interface that is
3032 included in the list of interfaces, but for which you get a failure error
3033 for this call. This happens when the interface is not "plumbed" into a
3034 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3035 failure of the "get flags" call assumes that the interface is down.
3036
303763. Added a ${eval10: operator, which assumes all numbers are decimal. This
3038 makes life easier for people who are doing arithmetic on fields extracted
3039 from dates, where you often get leading zeros that should not be
3040 interpreted as octal.
3041
304264. Added qualify_domain to the redirect router, to override the global
3043 setting.
3044
304565. If a pathologically long header line contained very many addresses (the
3046 report of this problem mentioned 10 000) and each of them was rewritten,
3047 Exim could use up a very large amount of memory. (It kept on making new
3048 copies of the header line as it rewrote, and never released the old ones.)
3049 At the expense of a bit more processing, the header rewriting function has
3050 been changed so that it no longer eats memory in this way.
3051
305266. The generation of the Received: header has been moved from the time that a
3053 message starts to be received, to the time that it finishes. The timestamp
3054 in the Received: header should now be very close to that of the <= log
3055 line. There are two side-effects of this change:
3056
3057 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3058 logged header lines no longer include the local Received: line, because
3059 it has not yet been created. The same applies to a copy of the message
3060 that is returned to a non-SMTP sender when a message is rejected.
3061
3062 (b) When a filter file is tested using -bf, no additional Received: header
3063 is added to the test message. After some thought, I decided that this
3064 is a bug fix.
3065
3066 This change does not affect the value of $received_for. It is still set
3067 after address rewriting, but before local_scan() is called.
3068
306967. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3070
307168. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3072 gave an unhelpful panic error message, and a defer error. I have managed to
3073 change this behaviour so that it now rejects any supplied certificate,
3074 which seems right, as the list of acceptable certificates is empty.
3075
307669. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3077 gave an unhelpful defer error. I have not managed to make this reject any
3078 supplied certificates, but the error message it gives is "no certificate
3079 supplied", which is not helpful.
3080
308170. exigrep's output now also includes lines that are not associated with any
3082 message, but which match the given pattern. Implemented by a patch from
3083 Martin Sluka, which also tidied up the Perl a bit.
3084
308571. Recipient callout verification, like sender verification, was using <> in
3086 the MAIL FROM command. This isn't really the right thing, since the actual
3087 sender may affect whether the remote host accepts the recipient or not. I
3088 have changed it to use the actual sender in the callout; this means that
3089 the cache record is now keyed on a recipient/sender pair, not just the
3090 recipient address. There doesn't seem to be a real danger of callout loops,
3091 since a callout by the remote host to check the sender would use <>.
3092 [SEE ABOVE: changed after hitting problems.]
3093
309472. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3095 temporary errors. However, in the case of such a code being given after
3096 the end of a data transmission (i.e. after ".") Exim was failing to write
3097 a retry record for the message. (Yes, there was some broken host that was
3098 actually sending 8xx at this point.)
3099
310073. An unknown lookup type in a host list could cause Exim to panic-die when
3101 the list was checked. (An example that provoked this was putting <; in the
3102 middle of a list instead of at the start.) If this happened during a DATA
3103 ACL check, a -D file could be left lying around. This kind of configuration
3104 error no longer causes Exim to die; instead it causes a defer errror. The
3105 incident is still logged to the main and panic logs.
3106
310774. Buglet left over from Exim 3 conversion. The message "too many messages
3108 in one connection" was written to the rejectlog but not the mainlog, except
3109 when address rewriting (yes!) was being logged.
3110
311175. Added write_rejectlog option.
3112
311376. When a system filter was run not as root (that is, when system_filter_user
3114 was set), the values of the $n variables were not being returned to the
3115 main process; thus, they were not subsequently available in the $sn
3116 variables.
3117
311877. Added +return_path_on_delivery log selector.
3119
312078. A connection timeout was being treated differently from recipients deferred
3121 when testing hosts_max_try with a message that was older than the host's
3122 retry timeout. (The host should not be counted, thus allowing all hosts to
3123 be tried at least once before bouncing.) This may have been the cause of an
3124 occasionally reported bug whereby a message would remain on the queue
3125 longer than the retry timeout, but would be bounced if a delivery was
3126 forced. I say "may" because I never totally pinned down the problem;
3127 setting up timeout/retry tests is difficult. See also the next item.
3128
312979. The ultimate address timeout was not being applied to errors that involved
3130 a combination of host plus message (for example, a timeout on a MAIL
3131 command). When an address resolved to a number of possible hosts, and they
3132 were not all tried for each delivery (e.g. because of hosts_max_try), a
3133 message could remain on the queue longer than the retry timeout.
3134
313580. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3136 Haardt.
3137
313881. Fixed an obscure SMTP outgoing bug which required at least the following
3139 conditions: (a) there was another message waiting for the same server;
3140 (b) the server returned 5xx to all RCPT commands in the first message so
3141 that the message was not completed; (c) the server dropped the connection
3142 or gave a negative response to the RSET that Exim sends to abort the
3143 transaction. The observed case was a dropped connection after DATA that had
3144 been sent in pipelining mode. That is, the server had advertised PIPELINING
3145 but was not implementing it correctly. The effect of the bug was incorrect
3146 behaviour, such as trying another host, and this could lead to a crash.
3147
3148
3149Exim version 4.30
3150-----------------
3151
3152 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3153 and daemon.c were passed as pointers to ints; they should have been
3154 pointers to socklen_t variables (which are typically unsigned ints).
3155
3156 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3157 fixed.
3158
3159 3. Fixed a really odd bug that affected only the testing scheme; patching a
3160 certain fixed string in the binary changed the value of another string that
3161 happened to be identical to the end of the original first string.
3162
3163 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3164 name", it returns that address as the IP address. On some operating
3165 systems (e.g. Solaris), it also passes back the IP address string as the
3166 "host name". However, on others (e.g. Linux), it passes back an empty
3167 string. Exim wasn't checking for this, and was changing the host name to an
3168 empty string, assuming it had been canonicized.
3169
3170 5. Although rare, it is permitted to have more than one PTR record for a given
3171 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3172 all the names associated with an address, because they do in Solaris.
3173 However, it seems that they do not in Linux for data that comes from the
3174 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3175 I found this out when I moved to a new Linux workstation and tried to run
3176 the Exim test suite.
3177
3178 To get round this problem I have changed the code so that it now does its
3179 own call to the DNS to look up PTR records when searching for a host name.
3180 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3181 addresses that are only in /etc/hosts are still found.
3182
3183 This behaviour is, however, controlled by an option called host_lookup_
3184 order, which defaults to "bydns:byaddr". If people want to use the other
3185 order, or indeed, just use one or the other means of lookup, they can
3186 specify it in this variable.
3187
3188 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3189 some operating systems, this comes back from gethostbyaddr() as an empty
3190 string, and this is what Exim used to test for. However, it seems that in
3191 other systems, "." is yielded. Exim now tests for this case too.
3192
3193 7. The values of check_spool_space and check_log_space are now held internally
3194 as a number of kilobytes instead of an absolute number of bytes. If a
3195 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3196 kilobyte. This means that much larger values can be stored.
3197
3198 8. Exim monitor: an attempt to get the action menu when not actually pointing
3199 at a message produces an empty menu entitled "No message selected". This
3200 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3201 no entries in it ("Shell widget menu has zero width and/or height"). So I
3202 have added a single, blank menu entry in this case.
3203
3204 9. Added ${quote_local_part.
3205
320610. MIME decoding is now applied to the contents of Subject: header lines when
3207 they are logged.
3208
320911. Now that a reference to $sender_host_address automatically causes a reverse
3210 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3211 host lookup before query-style lookups in lists that might use this
3212 variable. This has therefore been abolished, and the "net-" prefix is no
3213 longer necessary for query-style lookups.
3214
321512. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3216 have been a typo for LFLAGS, so it has been changed.
3217
321813. The install script calls Exim with "-C /dev/null" in order to find the
3219 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3220 to be output. Howeve, since Exim outputs its version number before the
3221 error, it didn't break the script. It just looked ugly. I fixed this by
3222 always allowing "-C /dev/null" if the caller is root.
3223
322414. Ignore overlarge ACL variable number when reading spool file - insurance
3225 against a later release with more variables having written the file.
3226
322715. The standard form for an IPv6 address literal was being rejected by EHLO.
3228 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3229 this, as well as the form without the "IPv6" on the front.
3230
323116. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3232 OS/Makefile-Darwin file.
3233
323417. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3235 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3236
323718. After change 4.21/52, "%ld" was used to format the contents of the $inode
3238 variable. However, some OS use ints for inodes. I've added cast to long int
3239 to get rid of the compiler warning.
3240
324119. I had forgotten to lock out "/../" in configuration file names when
3242 ALT_CONFIG_PREFIX was set.
3243
324420. Routers used for verification do not need to specify transports. However,
3245 if such a router generated a host list, and callout was configured, Exim
3246 crashed, because it could not find a port number from the (non-existent)
3247 transport. It now assumes port 25 in this circumstance.
3248
324921. Added the -t option to exigrep.
3250
325122. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3252 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3253 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3254 them is set, LOOKUP_LSEARCH is forced.
3255
325623. "exim -bV" now outputs a list of lookups that are included in the binary.
3257
325824. Added sender and host information to the "rejected by local_scan()" log
3259 line; previously there was no indication of these.
3260
326125. Added .include_if_exists.
3262
326326. Change 3.952/11 added an explicit directory sync on top of a file sync for
3264 Linux. It turns out that not all file systems support this. Apparently some
3265 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3266 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3267 not supported on the file descriptor, is now ignored when Exim is trying to
3268 sync a directory. This applies only to Linux.
3269
327027. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3271
327228. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3273 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3274 this.
3275
327629. Added support for maildirsize files from supplied patch (modified a bit).
3277
327830. The use of :fail: followed by an empty string could lead Exim to respond to
3279 sender verification failures with (e.g.):
3280
3281 550 Verification failed for <xxx>
3282 550 Sender verify failed
3283
3284 where the first response line was missing the '-' that indicates it is not
3285 the final line of the response.
3286
328731. The loop for finding the name of the user that called Exim had a hardwired
3288 limit of 10; it now uses the value of finduser_retries, which is used for
3289 all other user lookups.
3290
329132. Added $received_count variable, available in data and not_smtp ACLs, and at
3292 delivery time.
3293
329433. Exim was neglecting to zero errno before one call of strtol() when
3295 expanding a string and expecting an integer value. On some systems this
3296 resulted in spurious "integer overflow" errors. Also, it was casting the
3297 result into an int without checking.
3298
329934. Testing for a connection timeout using "timeout_connect" in the retry rules
3300 did not work. The code looks as if it has *never* worked, though it appears
3301 to have been documented since at least releast 1.62. I have made it work.
3302
330335. The "timeout_DNS" error in retry rules, also documented since at least
3304 1.62, also never worked. As it isn't clear exactly what this means, and
3305 clearly it isn't a major issue, I have abolished the feature by treating it
3306 as "timeout", and writing a warning to the main and panic logs.
3307
330836. The display of retry rules for -brt wasn't always showing the error code
3309 correctly.
3310
331137. Added new error conditions to retry rules: timeout_A, timeout_MX,
3312 timeout_connect_A, timeout_connect_MX.
3313
331438. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3315 to the empty sender.
3316
331739. The daemon was not analysing the content of -oX till after it had closed
3318 stderr and disconnected from the controlling terminal. This meant that any
3319 syntax errors were only noted on the panic log, and the return code from
3320 the command was 0. By re-arranging the code a little, I've made the
3321 decoding happen first, so such errors now appear on stderr, and the return
3322 code is 1. However, the actual setting up of the sockets still happens in
3323 the disconnected process, so errors there are still only recorded on the
3324 panic log.
3325
332640. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3327 connections (as happens on some IP stacks) was logged at start up time as
3328 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3329 it from "IPv6 and IPv4", which means that two separate sockets are being
3330 used.
3331
333241. The debug output for gethostbyname2() or getipnodebyname() failures now
3333 says whether AF_INET or AF_INET6 was passed as an argument.
3334
333542. Exiwhat output was messed up when time zones were included in log
3336 timestamps.
3337
333843. Exiwhat now gives more information about the daemon's listening ports,
3339 and whether -tls-on-connect was used.
3340
334144. The "port" option of the smtp transport is now expanded.
3342
334345. A "message" modifier in a "warn" statement in a non-message ACL was being
3344 silently ignored. Now an error message is written to the main and panic
3345 logs.
3346
334746. There's a new ACL modifier called "logwrite" which writes to a log file
3348 as soon as it is encountered.
3349
335047. Added $local_user_uid and $local_user_gid at routing time.
3351
335248. Exim crashed when trying to verify a sender address that was being
3353 rewritten to "<>".
3354
335549. Exim was recognizing only a space character after ".include". It now also
3356 recognizes a tab character.
3357
335850. Fixed several bugs in the Perl script that creates the exim.8 man page by
3359 extracting the relevant information from the specification. The man page no
3360 longer contains scrambled data for the -d option, and I've added a section
3361 at the front about calling Exim under different names.
3362
336351. Added "extra_headers" argument to the "mail" command in filter files.
3364
336552. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3366 crash.
3367
336853. Installed eximstats 1.29.
3369
337054. Added transport_filter_timeout as a generic transport option.
3371
337255. Exim no longer adds an empty Bcc: header to messages that have no To: or
3373 Cc: header lines. This was required by RFC 822, but it not required by RFC
3374 2822.
3375
337656. Exim used to add From:, Date:, and Message-Id: header lines to any
3377 incoming messages that did not have them. Now it does so only if the
3378 message originates locally, that is, if there is no associated remote host
3379 address. When Resent- header lines are present, this applies to the Resent-
3380 lines rather than the non-Resent- lines.
3381
338257. Drop incoming SMTP connection after too many syntax or protocol errors. The
3383 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3384
338558. Messages for configuration errors now include the name of the main
3386 configuration file - useful now that there may be more than one file in a
3387 list (.included file names were always shown).
3388
338959. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3390 for those rare installations that do not start the daemon as root or run it
3391 setuid root. I've cut out the call to initgroups() if the daemon is not
3392 root at that time.
3393
339460. The Exim user and group can now be bound into the binary as text strings
3395 that are looked up at the start of Exim's processing.
3396
339761. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3398
339962. Added $mailstore_basename variable.
3400
340163. Installed patch to sieve.c from Michael Haardt.
3402
340364. When Exim failed to open the panic log after failing to open the main log,
3404 the original message it was trying to log was written to stderr and debug
3405 output, but if they were not available (the usual case in production), it
3406 was lost. Now it is written to syslog before the two lines that record the
3407 failures to open the logs.
3408
340965. Users' Exim filters run in subprocesses under the user's uid. It is
3410 possible for a "deliver" command or an alias in a "personal" command to
3411 provoke an address rewrite. If logging of address rewriting is configured,
3412 this fails because the process is not running as root or exim. There may be
3413 a better way of dealing with this, but for the moment (because 4.30 needs
3414 to be released), I have disabled address rewrite logging when running a
3415 filter in a non-root, non-exim process.
3416
3417
3418Exim version 4.24
3419-----------------
3420
3421 1. The buildconfig auxiliary program wasn't quoting the value set for
3422 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3423 not defined. This bug was masked in 4.22 by the effect that was fixed in
3424 change 4.23/1.
3425
3426 2. Some messages that were rejected after a message id was allocated were
3427 shown as "incomplete" by exigrep. It no longer does this for messages that
3428 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3429
3430 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3431 have allow_domain_literals set, the ID did not get logged in the <= line.
3432 Domain literals are now always recognized in Message-ID: header lines.
3433
3434 4. The first argument for a ${extract expansion item is the key name or field
3435 number. Leading and trailing spaces in this item were not being ignored,
3436 causing some misleading effects.
3437
3438 5. When deliver_drop_privilege was set, single queue runner processes started
3439 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3440 same command in the process it spins off) were not dropping privilege.
3441
3442 6. When the daemon running as "exim" started a queue runner, it always
3443 re-executed Exim in the spun-off process. This is a waste of effort when
3444 deliver_drop_privilege is set. The new process now just calls the
3445 queue-runner function directly.
3446
3447
3448Exim version 4.23
3449-----------------
3450
3451 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3452 HEADERS_CHARSET.
3453
3454 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3455 ignored. Though the use of -oP was forcing the writing of a pid file, it
3456 was always written to the default place.
3457
3458 3. If the message "no IP address found for host xxxx" is generated during
3459 incoming verification, it is now followed by identification of the incoming
3460 connection (so you can more easily find what provoked it).
3461
3462 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3463
3464 5. Added some features to "harden" Exim a bit more against certain attacks:
3465
3466 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3467 be put in Local/Makefile. This is like the never_users runtime option,
3468 but it cannot be overridden. The default setting is "root".
3469
3470 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3471 prefix string with which any file named in a -C command line option
3472 must start.
3473
3474 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3475 is retained for -C and -D only if the caller of Exim is root. Without
3476 it, the exim user may also use -C and -D and retain privilege.
3477
3478 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3479 command line option is disabled.
3480
3481 6. Macro names set by the -D option must start with an upper case letter, just
3482 like macro names defined in the configuration file.
3483
3484 7. Added "dereference=" facility to LDAP.
3485
3486 8. Two instances of the typo "uknown" in the source files are fixed.
3487
3488 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3489 the Configure-Makefile script screwed up while processing it.
3490
349110. Incorporated PCRE 4.4.
3492
349311. The SMTP synchronization check was not operating right at the start of an
3494 SMTP session. For example, it could not catch a HELO sent before the client
3495 waited for the greeting. There is now a check for outstanding input at the
3496 point when the greeting is written. Because of the duplex, asynchronous
3497 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3498 way, but not yet received, when the check is performed.
3499
350012. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3501 on TCP/IP sockets, because this apparently causes some broken clients to
3502 timeout.
3503
350413. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3505 unchanged) from the Cygwin maintainer.
3506
350714. The code for -bV that shows what is in the binary showed "mbx" when maildir
3508 was supported instead of testing for mbx. Effectively a typo.
3509
351015. The spa authenticator server code was not checking that the input it
3511 received was valid base64.
3512
351316. The debug output line for the "set" modifier in ACLs was not showing the
3514 name of the variable that was being set.
3515
351617. Code tidy: the variable type "vtype_string" was never used. Removed it.
3517
351818. Previously, a reference to $sender_host_name did not cause a DNS reverse
3519 lookup on its own. Something else was needed to trigger the lookup. For
3520 example, a match in host_lookup or the need for a host name in a host list.
3521 Now, if $sender_host_name is referenced and the host name has not yet been
3522 looked up, a lookup is performed. If the lookup fails, the variable remains
3523 empty, and $host_lookup_failed is set to "1".
3524
352519. Added "eqi" as a case-independent comparison operator.
3526
352720. The saslauthd authentication condition could segfault if neither service
3528 nor realm was specified.
3529
353021. If an overflowing value such as "2048M" was set for message_size_limit, the
3531 error message that was logged was misleading, and incoming SMTP
3532 connections were dropped. The message is now more accurate, and temporary
3533 errors are given to SMTP connections.
3534
353522. In some error situations (such as 21 above) Exim rejects all SMTP commands
3536 (except RSET) with a 421 error, until QUIT is received. However, it was
3537 failing to send a response to QUIT.
3538
353923. The HELO ACL was being run before the code for helo_try_verify_hosts,
3540 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3541 ACL is now run after the helo_try_verify_hosts code.
3542
354324. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3544 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3545 case-independent, so other case variants are also recognized). Apparently
3546 some systems use these upper case variants.
3547
354825. If more than two messages were waiting for the same host, and a transport
3549 filter was specified for the transport, Exim sent two messages over the
3550 same TCP/IP connection, and then failed with "socket operation on non-
3551 socket" when it tried to send the third.
3552
355326. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3554
355527. The extern definition of crypt16() in expand.c was not being excluded when
3556 the OS had its own crypt16() function.
3557
355828. Added bounce_return_body as a new option, and bounce_return_size_limit
3559 as a preferred synonym for return_size_limit, both as an option and as an
3560 expansion variable.
3561
356229. Added LIBS=-liconv to OS/Makefile-OSF1.
3563
356430. Changed the default configuration ACL to relax the local part checking rule
3565 for addresses that are not in any local domains. For these addresses,
3566 slashes and pipe symbols are allowed within local parts, but the sequence
3567 /../ is explicitly forbidden.
3568
356931. SPA server authentication was not clearing the challenge buffer before
3570 using it.
3571
357232. log_message in a "warn" ACL statement was writing to the reject log as
3573 well as to the main log, which contradicts the documentation and doesn't
3574 seem right (because no rejection is happening). So I have stopped it.
3575
357633. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3577 However, I am unable to do any testing of this.
3578
357934. Fixed an infelicity in the appendfile transport. When checking directories
3580 for a mailbox, to see if any needed to be created, it was accidentally
3581 using path names with one or more superfluous leading slashes; tracing
3582 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3583
358435. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3585 contents are added to the log line that is written for every discarded
3586 recipient. (Previously a log_message setting was ignored.)
3587
358836. The ${quote: operator now quotes the string if it is empty.
3589
359037. The install script runs exim in order to find its version number. If for
3591 some reason other than non-existence or emptiness, which it checks, it
3592 could not run './exim', it was installing it with an empty version number,
3593 i.e. as "exim-". This error state is now caught, and the installation is
3594 aborted.
3595
359638. An argument was missing from the function that creates an error message
3597 when Exim fails to connect to the socket for saslauthd authentication.
3598 This could cause Exim to crash, or give a corrupted message.
3599
360039. Added isip, isip4, and isip6 to ${if conditions.
3601
360240. The ACL variables $acl_xx are now saved with the message, and can be
3603 accessed later in routers, transports, and filters.
3604
360541. The new lookup type nwildlsearch is like wildlsearch, except that the key
3606 strings in the file are not string-expanded.
3607
360842. If a MAIL command specified a SIZE value that was too large to fit into an
3609 int variable, the check against message_size_limit failed. Such values are
3610 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3611 day this will have to be increased, but I don't think I want to be around
3612 when emails are that large.
3613
3614
3615
3616Exim version 4.22
3617-----------------
3618
3619 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3620 iconv() is not standard in FreeBSD.
3621
3622 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3623 IPv6 enabled. The observed symptom was a segmentation fault on return from
3624 the function os_common_find_running_interfaces() in src/os.c.
3625
3626 3. In the check_special_case() function in daemon.c I had used "errno" as an
3627 argument name, which causes warnings on some systems. This was basically a
3628 typo, since it was named "eno" in the comments!
3629
3630 4. The code that waits for the clock to tick (at a resolution of some fraction
3631 of a second) so as to ensure message-id uniqueness was always waiting for
3632 at least one whole tick, when it could have waited for less. [This is
3633 almost certainly not relevant at current processor speeds, where it is
3634 unlikely to ever wait at all. But we try to future-proof.]
3635
3636 5. The function that sleeps for a time interval that includes fractions of a
3637 second contained a race. It did not block SIGALRM between setting the
3638 timer, and suspending (a couple of lines later). If the interval was short
3639 and the sigsuspend() was delayed until after it had expired, the suspension
3640 never ended. On busy systems this could lead to processes getting stuck for
3641 ever.
3642
3643 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3644 process, before it forks any delivery processes. The open lookup caching
3645 mechanism meant that the open file or database connection was passed into
3646 the delivery process. The problem was that delivery processes always tidy