Remove commented-out old de-duplication code. It's been over a year now.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
5547e2c5 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.364 2006/06/30 13:57:46 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
c59f5781 64
c887c79e
TF
65Exim version 4.62
66-----------------
67
68TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
69 other effects) broke the use of negated acl sub-conditions.
70
1cce3af8
PH
71PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
72 patch).
73
afb3eaaf
PH
74PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
75 "Deny" causes Exim to reject the incoming connection with a 554 error.
76 Unfortunately, if there is a major crisis, such as a disk failure,
77 tcp-wrappers gives "deny", whereas what one would like would be some
78 kind of temporary error. A kludge has been added to help with this.
79 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
80 554 error is used if errno is still zero or contains ENOENT (which occurs
81 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
82 451 error is used.
83
e173618b
PH
84PH/03 Add -lutil to the default FreeBSD LIBS setting.
85
dd16e114
PH
86PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
87 errors. Otherwise a message that provokes a temporary error (when other
88 messages do not) can cause a whole host to time out.
89
f7fd3850
PH
90PH/05 Batch deliveries by appendfile and pipe transports did not work when the
91 addresses were routed directly to files or pipes from a redirect router.
92 File deliveries just didn't batch; pipe deliveries might have suffered
93 odd errors.
94
d87df92c
PH
95PH/06 A failure to get a lock for a hints database would erroneously always say
96 "Failed to get write lock", even when it was really a read lock.
97
7e9f683d
PH
98PH/07 The appendfile transport was creating MBX lock files with a fixed mode
99 of 0600. This has been changed to use the value of the lockfile_mode
100 option (which defaults to 0600).
101
bfad5236
PH
102PH/08 Applied small patch from the Sieve maintainer.
103
01c490df
PH
104PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
105 folder from quota calculations, a direct delivery into this folder messed
106 up the contents of the maildirsize file. This was because the regex was
107 used only to exclude .Trash (or whatever) when the size of the mailbox
108 was calculated. There was no check that a delivery was happening into an
109 excluded directory. This bug has been fixed by ignoring all quota
110 processing for deliveries into excluded directories.
111
d6629cdc
PH
112PH/10 Added the maildirfolder_create_regex option to appendfile.
113
1cce3af8 114
214e2000
PH
115Exim version 4.61
116-----------------
117
118PH/01 The code for finding all the local interface addresses on a FreeBSD
119 system running IPv6 was broken. This may well have applied to all BSD
120 systems, as well as to others that have similar system calls. The broken
121 code found IPv4 interfaces correctly, but gave incorrect values for the
122 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
123 that it would not match correctly against @[] and not recognize the IPv6
124 addresses as local.
125
f9daeae0
PH
126PH/02 The ipliteral router was not recognizing addresses of the form user@
127 [ipv6:....] because it didn't know about the "ipv6:" prefix.
128
7e66e54d
PH
129PH/03 Added disable_ipv6.
130
c8ea1597
PH
131PH/04 Changed $reply_address to use the raw form of the headers instead of the
132 decoded form, because it is most often used to construct To: headers
133 lines in autoreplies, and the decoded form may well be syntactically
134 invalid. However, $reply_address has leading white space removed, and all
135 newlines turned into spaces so that the autoreply transport does not
136 grumble.
137
911f6fde
PH
138PH/05 If group was specified without a user on a router, and no group or user
139 was specified on a transport, the group from the router was ignored.
140
47ca6d6c
PH
141PH/06 Increased the number of ACL variables to 20 of each type, and arranged
142 for visible compile-time settings that can be used to change these
143 numbers, for those that want even more. Backwards compatibility with old
144 spool files has been maintained. However, going back to a previous Exim
145 release will lost any variables that are in spool files.
146
ed0e9820
PH
147PH/07 Two small changes when running in the test harness: increase delay when
148 passing a TCP/IP connection to a new process, in case the original
149 process has to generate a bounce, and remove special handling of
150 127.0.0.2 (sic), which is no longer necessary.
151
eff37e47
PH
152PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
153 be the same on different OS.
154
1921d2ea
PH
155PH/09 Moved a debug statement in filter processing to avoid a race problem when
156 testing.
157
b3f69ca8
JJ
158JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
159 whether --show-vars was specified or not
160
161JJ/02 exipick: Added support for new ACL variable spool format introduced
162 in 4.61-PH/06
163
424a1c63
PH
164PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
165 syntactically invalid From: or Reply-to: line, and a filter used this to
166 generate an autoreply, and therefore failed to obtain an address for the
167 autoreply, Exim could try to deliver to a non-existent relative file
168 name, causing unrelated and misleading errors. What now happens is that
169 it logs this as a hard delivery error, but does not attempt to create a
170 bounce message.
171
7a100415
PH
172PH/11 The exinext utility has a -C option for testing purposes, but although
173 the given file was scanned by exinext itself; it wasn't being passed on
174 when Exim was called.
175
19b9dc85
PH
176PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
177 an end-of-file indication when reading a command response.
178
309bd837
PH
179PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
180 compiled. In many other places in Exim, IPv6 addresses are always
181 recognized, so I have changed this. It also means that IPv4 domain
182 literals of the form [IPV4:n.n.n.n] are now always recognized.
183
59e82a2a
PH
184PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
185 used if the router is not running as root, for example, when verifying at
186 ACL time, or when using -bh. The debugging output from this situation was
187 non-existent - all you got was a failure to exec. I have made two
188 changes:
189
190 (a) Failures to set uid/gid, the current directory, or a process leader
191 in a subprocess such as that created by queryprogram now generate
192 suitable debugging ouput when -d is set.
193
194 (b) The queryprogram router detects when it is not running as root,
195 outputs suitable debugging information if -d is set, and then runs
196 the subprocess without attempting to change uid/gid.
197
9edc04ce
PH
198PH/15 Minor change to Makefile for building test_host (undocumented testing
199 feature).
200
1349e1e5
PH
201PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
202 additional section of a DNS packet that returns MX or SRV records.
203 Instead, it always explicitly searches for A/AAAA records. This avoids
204 major problems that occur when a DNS server includes only records of one
205 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
206 fixed another bug: if SRV records were looked up and the corresponding
207 address records were *not* found in the additional section, the port
208 values from the SRV records were lost.
209
ea49d0e1
PH
210PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
211 using the correct key (the original address) when searching the retry
212 rules in order to find which one to use for generating the retry hint.
213
064a94c9
PH
214PH/18 If quota_warn_message contains a From: header, Exim now refrains from
215 adding the default one. Similarly, if it contains a Reply-To: header, the
216 errors_reply_to option, if set, is not used.
217
727071f8
PH
218PH/19 When calculating a retry time, Exim used to measure the "time since
219 failure" by looking at the "first failed" field in the retry record. Now
220 it does not use this if it is later than than the arrival time of the
221 message. Instead it uses the arrival time. This makes for better
222 behaviour in cases where some deliveries succeed, thus re-setting the
223 "first failed" field. An example is a quota failure for a huge message
224 when small messages continue to be delivered. Without this change, the
225 "time since failure" will always be short, possible causing more frequent
226 delivery attempts for the huge message than are intended.
dd16e114 227 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 228
f78eb7c6
PH
229PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
230 $1, $2, $3) because the numerical variables can be reset during some
231 expansion items (e.g. "match"), thereby losing the authentication data.
232
21c28500
PH
233PH/21 Make -bV show the size of off_t variables so that the test suite can
234 decide whether to run tests for quotas > 2G.
235
236PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
237 mailbox_size, and mailbox_filecount in the appendfile transport. If a
238 filecount value is greater than 2G or if a quota value is greater than 2G
239 on a system where the size of off_t is not greater than 4, a panic error
240 is given.
241
1688f43b
PH
242PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
243 never match. The debug and -bh output now contains an explicit error
244 message indicating a malformed IPv4 address or mask.
245
246PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
247 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
248 PH/23 above applies.
249
9675b384
PH
250PH/25 Do not write to syslog when running in the test harness. The only
251 occasion when this arises is a failure to open the main or panic logs
252 (for which there is an explicit test).
253
6a3f1455
PH
254PH/26 Added the /no_tell option to "control=freeze".
255
dac79d3e
PH
256PH/27 If a host name lookup failed very early in a connection, for example, if
257 the IP address matched host_lookup and the reverse lookup yielded a name
258 that did not have a forward lookup, an error message of the form "no IP
259 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
260 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 261
5977a0b3
PH
262PH/28 An enabling patch from MH: add new function child_open_exim2() which
263 allows the sender and the authenticated sender to be set when
264 submitting a message from within Exim. Since child_open_exim() is
265 documented for local_scan(), the new function should be too.
266
c91535f3
PH
267PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
268 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
269 results in an empty string is now treated as unset.
270
0d46a8c8
PH
271PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
272
278c6e6c
PH
273PH/31 Added sender_verify_fail logging option.
274
2cbb4081
PH
275PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
276 needed by RFC 822 but not by RFC 2822 was commented out. I have now
277 tidied the source and removed it altogether.
278
3eef829e
PH
279PH/33 When a queue run was abandoned because the load average was too high, a
280 log line was always written; now it is written only if the queue_run log
281 selector is set. In addition, the log line for abandonment now contains
282 information about the queue run such as the pid. This is always present
283 in "start" and "stop" lines but was omitted from the "abandon" line.
284
1ab95fa6
PH
285PH/34 Omit spaces between a header name and the colon in the error message that
286 is given when verify = headers_syntax fails (if there are lots of them,
287 the message gets confusing).
288
230205fc
PH
289PH/35 Change the default for dns_check_names_pattern to allow slashes within
290 names, as there are now some PTR records that contain slashes. This check
291 is only to protect against broken name servers that fall over on strange
292 characters, so the fact that it applies to all lookups doesn't matter.
293
75e0e026
PH
294PH/36 Now that the new test suite is complete, we can remove some of the
295 special code in Exim that was needed for the old test suite. For example,
296 sorting DNS records because real resolvers return them in an arbitrary
297 order. The new test suite's fake resolver always returns records in the
298 same order.
299
300PH/37 When running in the test harness, use -odi for submitted messages (e.g.
301 bounces) except when queue_only is set, to avoid logging races between
302 the different processes.
303
145396a6
PH
304PH/38 Panic-die if .include specifies a non-absolute path.
305
3cd34f13
PH
306PH/39 A tweak to the "H" retry rule from its user.
307
11121d3d
JJ
308JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
309 a label. They prevented compilation on older perls.
310
311JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
312 a warning to be raised on newish perls.
313
314JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
315 on queue. Changes to match documented behaviour of showing count of
316 messages matching specified criteria.
317
8def5aaf
PH
318PH/40 Changed the default ident timeout from 30s to 5s.
319
929ba01c
PH
320PH/41 Added support for the use of login_cap features, on those BSD systems
321 that have them, for controlling the resources used by pipe deliveries.
322
2632889e
PH
323PH/42 The content-scanning code uses fopen() to create files in which to put
324 message data. Previously it was not paying any attention to the mode of
325 the files. Exim runs with umask(0) because the rest of the code creates
326 files with open(), and sets the required mode explicitly. Thus, these
327 files were ending up world-writeable. This was not a big issue, because,
328 being within the spool directory, they were not world-accessible. I have
329 created a function called modefopen, which takes an additional mode
330 argument. It sets umask(777), creates the file, chmods it to the required
331 mode, then resets the umask. All the relevant calls to fopen() in the
332 content scanning code have been changed to use this function.
333
944a9c55
PH
334PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
335 to 24 hours. This avoids potential overflow problems when processing G
336 and H retry rules. I suspect nobody ever tinkers with this value.
337
4a23603b
PH
338PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
339
4730f942
PH
340PH/45 When the plaintext authenticator is running as a client, the server's
341 challenges are checked to ensure they are valid base64 strings. By
342 default, the authentication attempt is cancelled if an invalid string is
343 received. Setting client_ignore_invalid_base64 true ignores these errors.
344 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
345 they are received. Thus, the responses can be made to depend on the
346 challenges. If an invalid string is ignored, an empty string is placed in
347 the variable.
348
30dba1e6
PH
349PH/46 Messages that are created by the autoreply transport now contains a
350 References: header, in accordance with RFCs 2822 and 3834.
351
382afc6b
PH
352PH/47 Added authenticated_sender_force to the smtp transport.
353
a86229cf
PH
354PH/48 The ${prvs expansion was broken on systems where time_t was long long.
355
50c99ba6
PH
356PH/49 Installed latest patch from the Sieve maintainer.
357
d35e429d
PH
358PH/50 When an Exim quota was set without a file count quota, and mailbox_size
359 was also set, the appendfile transport was unnecessarily scanning a
360 directory of message files (e.g. for maildir delivery) to find the count
361 of files (along with the size), even though it did not need this
362 information. It now does the scan only if it needs to find either the
363 size of the count of files.
364
f90d018c
PH
365PH/51 Added ${time_eval: to convert Exim time strings into seconds.
366
75def545
PH
367PH/52 Two bugs concerned with error handling when the smtp transport is
368 used in LMTP mode:
369
370 (i) Exim was not creating retry information for temporary errors given
371 for individual recipients after the DATA command when the smtp transport
372 was used in LMTP mode. This meant that they could be retried too
373 frequently, and not timed out correctly.
374
375 (ii) Exim was setting the flag that allows error details to be returned
376 for LMTP errors on RCPT commands, but not for LMTP errors for individual
377 recipients that were returned after the DATA command.
378
379PH/53 This is related to PH/52, but is more general: for any failing address,
380 when detailed error information was permitted to be returned to the
381 sender, but the error was temporary, then after the final timeout, only
382 "retry timeout exceeded" was returned. Now it returns the full error as
383 well as "retry timeout exceeded".
384
c46782ef
PH
385PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
386 do this, and (what is worse) MTAs that accept it.
387
71fafd95
PH
388PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
389 will now be deprecated.
390
2c5db4fd
PH
391PH/56 New os.c-cygwin from the Cygwin maintainer.
392
9cf6b11a
JJ
393JJ/06 exipick: added --unsorted option to allow unsorted output in all output
394 formats (previously only available in exim formats via -bpr, -bpru,
395 and -bpra. Now also available in native and exiqgrep formats)
396
397JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
398 with very large, slow to parse queues
399
400JJ/08 exipick: added ! as generic prefix to negate any criteria format
401
402JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
403
898d150f
PH
404PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
405 responses to authentication challenges, though it was showing the
406 challenges; (ii) I've removed the CR characters from the debug output for
407 SMTP output lines.
408
46218253
PH
409PH/58 Allow for the insertion of a newline as well as a space when a string
410 is turned into more than one encoded-word during RFC 2047 encoding. The
411 Sieve code now uses this.
412
e97957bc
PH
413PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
414 data_4xx, lost_connection, tls_required.
415
81e509d7
PH
416PH/60 When a VRFY deferred or FAILED, the log message rather than the user
417 message was being sent as an SMTP response.
418
3d240ff7
PH
419PH/61 Add -l and -k options to exicyclog.
420
b37c4101
PH
421PH/62 When verifying, if an address was redirected to one new address, so that
422 verification continued, and the new address failed or deferred after
423 having set something in $address_data, the value of $address_data was not
424 passed back to the ACL. This was different to the case when no
425 redirection occurred. The value is now passed back in both cases.
426
79378e0f
PH
427PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
428 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
429 use login_cap.h, so on its own it isn't the distinguishing feature. The
430 new name refers directly to the setclassresources() function.
431
e49c7bb4
PH
432PH/65 Added configuration files for NetBSD3.
433
d114ec46
PH
434PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
435
f3d7df6c
PH
436PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
437 is preferred over IPv4.
438
715ab376
PH
439PH/68 The bounce_return_message and bounce_return_body options were not being
440 honoured for bounces generated during the reception of non-SMTP messages.
441 In particular, this applied to messages rejected by the ACL. This bug has
442 been fixed. However, if bounce_return_message is true and bounce_return_
443 body is false, the headers that are returned for a non-SMTP message
444 include only those that have been read before the error was detected.
445 (In the case of an ACL rejection, they have all been read.)
446
6b31b150
PH
447PH/69 The HTML version of the specification is now built in a directory called
448 spec_html instead of spec.html, because the latter looks like a path with
449 a MIME-type, and this confuses some software.
450
451PH/70 Catch two compiler warnings in sieve.c.
452
d515a917
PH
453PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
454 function verify_get_ident() calls ip_connect() to connect a socket, but
455 if the "connect()" function timed out, ip_connect() used to close the
456 socket. However, verify_get_ident() also closes the socket later, and in
457 between Exim writes to the log, which may get opened at this point. When
458 the socket was closed in ip_connect(), the log could get the same file
459 descriptor number as the socket. This naturally causes chaos. The fix is
460 not to close the socket in ip_connect(); the socket should be closed by
461 the function that creates it. There was only one place in the code where
462 this was missing, in the iplookup router, which I don't think anybody now
463 uses, but I've fixed it anyway.
464
9b8fadde
PH
465PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
466 well as to direct DNS lookups. Otherwise the handling of names in host
467 lists is inconsistent and therefore confusing.
468
214e2000 469
5de37277
PH
470Exim version 4.60
471-----------------
472
cc38ddbf
PH
473PH/01 Two changes to the default runtime configuration:
474
475 (1) Move the checks for relay_from_hosts and authenticated clients from
476 after to before the (commented out) DNS black list checks.
477
478 (2) Add control=submission to the relay_from_hosts and authenticated
479 clients checks, on the grounds that messages accepted by these
480 statements are most likely to be submissions.
5de37277 481
72fdd6ae
PH
482PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
483
484 (1) Generate an error if the third argument for the ${prvs expansion is
485 not a single digit.
486
487 (2) Treat a missing third argument of ${prvscheck as if it were an empty
488 string.
489
490 (3) Reset the variables that are obtained from the first argument of
491 ${prvscheck and used in the second argument before leaving the code,
492 because their memory is reclaimed, so using them afterwards may do
493 silly things.
494
495 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
496 one (it's much easier than Tom thought :-).
497
498 (5) Because of (4), we can now allow for the use of $prvscheck_result
499 inside the third argument.
cb9328de 500
cb741023
PH
501PH/03 For some reason, the default setting of PATH when running a command from
502 a pipe transport was just "/usr/bin". I have changed it to
503 "/bin:/usr/bin".
504
f174f16e
PH
505PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
506 anything to be listed in the output from -bV.
b2f5a032 507
c25242d7
PH
508PH/05 When a filter generated an autoreply, the entire To: header line was
509 quoted in the delivery log line, like this:
510
511 => >A.N.Other <ano@some.domain> <original@ddress> ...
512
513 This has been changed so that it extracts the operative address. There
514 may be more than one such address. If so, they are comma-separated, like
515 this:
516
517 => >ano@some.domain,ona@other.domain <original@ddress> ...
518
82c19f95
PH
519PH/06 When a client host used a correct literal IP address in a HELO or EHLO
520 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
521 not being looked up in the rDNS to get a host name, Exim was showing the
522 IP address twice in Received: lines, even though the IP addresses were
523 identical. For example:
524
525 Received: from [1.2.3.4] (helo=[1.2.3.4])
526
527 However, if the real host name was known, it was omitting the HELO data
528 if it matched the actual IP address. This has been tidied up so that it
529 doesn't show the same IP address twice.
530
d7ffbc12
PH
531PH/07 When both +timestamp and +memory debugging was on, the value given by
532 $tod_xxx expansions could be wrong, because the tod_stamp() function was
533 called by the debug printing, thereby overwriting the timestamp buffer.
534 Debugging no longer uses the tod_stamp() function when +timestamp is set.
535
9f526266
PH
536PH/08 When the original message was included in an autoreply transport, it
537 always said "this is a copy of the message, including all the headers",
538 even if body_only or headers_only was set. It now gives an appropriate
539 message.
540
87fcc8b9
PH
541PH/09 Applied a patch from the Sieve maintainer which:
542
543 o fixes some comments
544 o adds the (disabled) notify extension core
545 o adds some debug output for the result of if/elsif tests
546 o points to the current vacation draft in the documentation
547 and documents the missing references header update
548
549 and most important:
550
551 o fixes a bug in processing the envelope test (when testing
552 multiple envelope elements, the last element determinted the
553 result)
554
456682f5
PH
555PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
556 Electronic Mail") by including:
557
558 Auto-submitted: auto-generated
559
560 in the messages that it generates (bounce messages and others, such as
561 warnings). In the case of bounce messages for non-SMTP mesages, there was
562 also a typo: it was using "Auto_submitted" (underscore instead of
563 hyphen). Since every message generated by Exim is necessarily in response
564 to another message, thes have all been changed to:
565
566 Auto-Submitted: auto-replied
567
568 in accordance with these statements in the RFC:
569
570 The auto-replied keyword:
571
572 - SHOULD be used on messages sent in direct response to another
573 message by an automatic process,
574
575 - MUST NOT be used on manually-generated messages,
576
577 - MAY be used on Delivery Status Notifications (DSNs) and Message
578 Disposition Notifications (MDNs),
579
580 - MUST NOT be used on messages generated by automatic or periodic
581 processes, except for messages which are automatic responses to
582 other messages.
583
3e46c1aa
PH
584PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
585 to the default Received: header definition.
456682f5 586
49826d12
PH
587PH/12 Added log selector acl_warn_skipped (default on).
588
eba0c039
PH
589PH/13 After a successful wildlsearch lookup, discard the values of numeric
590 variables because (a) they are in the wrong storage pool and (b) even if
591 they were copied, it wouldn't work properly because of the caching.
592
a0d6ba8a
PH
593PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
594 checking when decoding. Apparently there are clients that generate
595 overlong encoded strings. Why am I not surprised?
596
f0917727
PH
597PH/15 If the first argument of "${if match_address" was not empty, but did not
598 contain an "@" character, Exim crashed. Now it writes a panic log message
599 and treats the condition as false.
600
096fee00
PH
601PH/16 In autoreply, treat an empty string for "once" the same as unset.
602
024bd3c2
PH
603PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
604 extension "envelope-auth". The code is finished and in agreement with
605 other implementations, but there is no documentation so far and in fact,
606 nobody wrote the draft yet. This extension is currently #undef'ed, thus
607 not changing the active code.
608
609 Print executed "if" and "elsif" statements when debugging is used. This
610 helps a great deal to understand what a filter does.
611
612 Document more things not specified clearly in RFC3028. I had all this
613 sorted out, when out of a sudden new issues came to my mind. Oops."
614
df199fec
PH
615PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
616 (Bugzilla #53).
617
d27f1df3
PH
618PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
619 canonical form (as documented). However, after a host name lookup from
620 the IP address, check_host() was doing a simple string comparison with
621 addresses acquired from the DNS when checking that the found name did
622 have the original IP as one of its addresses. Since any found IPv6
623 addresses are likely to be in abbreviated form, the comparison could
624 fail. Luckily, there already exists a function for doing the comparison
625 by converting both addresses to binary, so now that is used instead of
626 the text comparison.
627
96776534
PH
628PH/20 There was another similar case to PH/19, when a complete host name was
629 given in a host list; looking up its IP address could give an abbreviated
630 form, whereas the current host's name might or might not be abbreviated.
631 The same fix has been applied.
632
5de37277 633
9a799bc0
PH
634Exim version 4.54
635-----------------
636
637PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
638 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
639 It now does.
640
99a4b039
PH
641PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
642 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
643
644PH/03 Typo: missing ".o" in src/pcre/Makefile.
645
4b233853
PH
646PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
647 header line, restrict the check to what is listed in RFCs 2369 and 2929.
648 Also, for "Auto-Submitted", treat anything other than "no" as
649 non-personal, in accordance with RFC 3834. (Previously it treated
650 anything starting "auto-" as non-personal.)
651
8857ccfd
PH
652TF/01 The control=submission/name=... option had a problem with syntax
653 errors if the name included a slash character. The /name= option
654 now slurps the rest of the string, so it can include any characters
655 but it must come last in the list of options (after /sender_retain
656 or /domain=).
657
433a2980
PH
658PH/05 Some modifications to the interface to the fake nameserver for the new
659 testing suite.
660
3e46c1aa 661
9a799bc0 662
e3a311ba
TK
663Exim version 4.53
664-----------------
665
666TK/01 Added the "success_on_redirect" address verification option. See
667 NewStuff for rationale and an example.
668
13b685f9
PH
669PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
670
395ff96d
PH
671PH/02 Patch to exigrep to allow it to work on syslog lines.
672
5b68f6e4
PH
673PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
674 fread() to skip over the body file's header line, because in Cygwin the
675 header line is locked and is inaccessible.
676
1ab52c69
PH
677PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
678 co-exist for some time) to make it clear that it is the Exim ID that is
679 referenced, not the Message-ID: header line.
680
b07e6aa3
PH
681PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
682 string_format() function, because snprintf() does not exist on all
683 operating systems.
684
254e032f
PH
685PH/06 The use of forbid_filter_existstest now also locks out the use of the
686 ${stat: expansion item.
687
3af76a81
PH
688PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
689 protocol synchronization error", to keep the pedants happy.
690
2548ba04
PH
691PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
692 well as for IRIX systems, when gcc is being used. See the host.c source
693 file for comments.
694
b6c6011d
PH
695PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
696
cf39cf57
PH
697PH/10 Named domain lists were not working if used in a queue_smtp_domains
698 setting.
699
f1513293
PH
700PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
701 transport and to the smtp transport in LMTP mode.
702
727549a4
PH
703TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
704
af46795e
PH
705PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
706 run a filter in a subprocess. This could lead to confusion in subsequent
707 lookups in the parent process. There should also be a search_tidyup() at
708 the end of the subprocess.
709
d7b47fd0
PH
710PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
711 only if the host matched helo_try_verify_hosts, which caused the
712 verification to occur when the EHLO/HELO command was issued. The ACL just
713 tested the remembered result. Now, if a previous verification attempt has
714 not happened, "verify = helo" does it there and then.
715
ee744174
JJ
716JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
717
b582ab87
PH
718TK/03 Fix log output including CR from clamd.
719
41a13e0a
PH
720PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
721 exist provoked a memory error which could cause a segfault.
722
f625cc5a
PH
723PH/15 Installed PCRE 6.2
724
725PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
726
21f7af35
PH
727PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
728 of the problem. Specifically, suggested +O2 rather than +O1 for the
729 HP-UX compiler.
730
31480e42
PH
731PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
732
2d280592
PH
733PH/20 If a delivery was routed to a non-standard port by means of an SRV
734 record, the port was not correctly logged when the outgoing_port log
735 selector was set (it logged the transort's default port).
736
7cd1141b
PH
737PH/21 Added support for host-specific ports to manualroute, queryprogram,
738 fallback_hosts, and "hosts" in the smtp transport.
739
740PH/22 If the log selector "outgoing_port" is set, the port is now also given on
741 host errors such as "Connection refused".
742
750af86e
PH
743PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
744 authentication with radiusclient 0.4.9:
745
746 - Error returned from rc_read_config was caught wrongly
747 - Username/password not passed on to radius server due to wrong length.
748
749 The presumption is that some radiusclient API changes for 4.51/PH/17
750 were not taken care of correctly. The code is still untested by me (my
751 Linux distribution still has 0.3.2 of radiusclient), but it was
752 contributed by a Radius user.
753
754PH/24 When doing a callout, the value of $domain wasn't set correctly when
755 expanding the "port" option of the smtp transport.
756
4304270b
TK
757TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
758 while reading a MIME header. Thanks to Tom Hughes for a patch.
759
750af86e
PH
760PH/24 Include config.h inside local_scan.h so that configuration settings are
761 available.
762
64ffc24f
PH
763PH/25 Make $smtp_command_argument available after all SMTP commands. This means
764 that in an ACL for RCPT (for example), you can examine exactly what was
765 received.
766
5dd9625b
PH
767PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
768 commands, but it was not correctly comparing the address with the actual
769 client host address. Thus, it would show the EHLO address in Received:
770 header lines when this was not necessary.
771
5591031b
PH
772PH/27 Added the % operator to ${eval:}.
773
ba18e66a
PH
774PH/28 Exim tries to create and chdir to its spool directory when it starts;
775 it should be ignoring failures (because with -C, for example, it has lost
776 privilege). It wasn't ignoring creation failures other than "already
777 exists".
778
9cec981f
PH
779PH/29 Added "crypteq" to the list of supported features that Exim outputs when
780 -bV or -d is used.
781
aa2b5c79
PH
782PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
783 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
784 too many continuations, the temporary file was not being removed, and the
785 return code was incorrect.
aa2b5c79 786
48a53b7f
PH
787PH/31 Missing "BOOL" in function definition in filtertest.c.
788
1c59d63b
PH
789PH/32 Applied Sieve patches from the maintainer.
790
671012da
TK
791TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
792
1509d3a8
PH
793PH/33 Added "verify = not_blind".
794
795PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
796 Local/Makefile (with some defaults set). These are used in built scripts
797 such as exicyclog, but they have never been used in the exim_install
798 script (though there are many overriding facilities there). I have
799 arranged that the exim_install script now takes note of these two
800 settings.
801
802PH/35 Installed configuration files for Dragonfly.
803
2fe1a124
PH
804PH/36 When a locally submitted message by a trusted user did not contain a
805 From: header, and the sender address was obtained from -f or from an SMTP
806 MAIL command, and the trusted user did not use -F to supply a sender
807 name, $originator_name was incorrectly used when constructing a From:
808 header. Furthermore, $originator_name was used for submission mode
809 messages from external hosts without From: headers in a similar way,
810 which is clearly wrong.
811
8800895a
PH
812PH/37 Added control=suppress_local_fixups.
813
ccfdb010
PH
814PH/38 When log_selector = +received_sender was set, and the addition of the
815 sender made the log line's construction buffer exactly full, or one byte
816 less than full, an overflow happened when the terminating "\n" was
817 subsequently added.
818
1130bfb0
PH
819PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
820 when the result of a list match is failure because a DNS lookup failed.
821
ebcb507f
PH
822PH/40 RM_COMMAND is now used in the building process.
823
c35e155c
PH
824PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
825 the "build-* directories that it finds.
826
95d1f782
PH
827PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
828 address in a domain literal was a prefix of an interface address.
829
fd6de02e
PH
830PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
831 when verifying a sender address, unless rewrite_headers is false.
832
58de37c5
PH
833PH/44 Wrote a long comment about why errors_to addresses are verified as
834 recipients, not senders.
835
261cf466
TF
836TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
837 the ratelimit ACL was added.
838
3ee512ff
PH
839PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
840
e08c430f
PH
841PH/46 Added extra information about PostgreSQL errors to the error string.
842
bef5a11f
PH
843PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
844 avoiding the need to install special zones in a real server. This is
845 backwards compatible; if it can't find the fake resolver, it drops back.
846 Thus, both old and new test suites can be run.
847
7546de58
TF
848TF/02 Added util/ratelimit.pl
849
e5d5a95f
TF
850TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
851 clock is set back in time.
852
2e88a017
TF
853TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
854 Candler <B.Candler@pobox.com>.
855
a5f65aa4
TF
856TF/05 The fix for PH/43 was not completely correct; widen_domains is always
857 OK for addresses that are the result of redirections.
858
e7726cbf
PH
859PH/48 A number of further additions for the benefit of the new test suite,
860 including a fake gethostbyname() that interfaces to the fake DNS resolver
861 (see PH/47 above).
862
a7fdad5b
TF
863TF/06 The fix for widen_domains has also been applied to qualify_single and
864 search_parents which are the other dnslookup options that can cause
865 header rewrites.
866
6af56900
PH
867PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
868 type ("H").
869
0925ede6
PH
870PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
871
66afa403
TF
872TF/07 Exim produced the error message "an SRV record indicated no SMTP
873 service" if it encountered an MX record with an empty target hostname.
874 The message is now "an MX or SRV record indicated no SMTP service".
875
0154e85a
TF
876TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
877 if the DNS of the sending site is misconfigured. This is quite a
878 common situation. This change restores the behaviour of treating a
879 helo verification defer as a failure.
880
16f12c76
PH
881PH/51 If self=fail was set on a router, the bounce message did not include the
882 actual error message.
883
bbe902f0 884
e5a9dba6
PH
885Exim version 4.52
886-----------------
887
888TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
889
22c3b60b
PH
890PH/01 When a transport filter timed out in a pipe delivery, and the pipe
891 command itself ended in error, the underlying message about the transport
892 filter timeout was being overwritten with the pipe command error. Now the
893 underlying error message should be appended to the second error message.
894
06a9b4b5
PH
895TK/01 Fix poll() being unavailable on Mac OSX 10.2.
896
c1ac6996
PH
897PH/02 Reduce the amount of output that "make" produces by default. Full output
898 can still be requested.
899
9c7a242c
PH
900PH/03 The warning log line about a condition test deferring for a "warn" verb
901 was being output only once per connection, rather than after each
902 occurrence (because it was using the same function as for successful
903 "warn" verbs). This seems wrong, so I have changed it.
904
87ba3f5f
PH
905TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
906 it should not have, which might have caused a crash in the right
907 circumstances, but probably never did.
908
909PH/04 Installed a modified version of Tony Finch's patch to make submission
910 mode fix the return path as well as the Sender: header line, and to
911 add a /name= option so that you can make the user's friendly name appear
912 in the header line.
913
29aba418
TF
914TF/03 Added the control = fakedefer ACL modifier.
915
fe0dab11
TF
916TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
917 Mark Lowes for thorough testing.
870f6ba8 918
11d337a4
TK
919TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
920
921TK/03 Merged latest SRS patch from Miles Wilton.
922
415c8f3b
PH
923PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
924 with the definition in sysexits.h (which is #included earlier).
925 Fortunately, Exim does not actually use EX_OK. The code used to try to
926 preserve the sysexits.h value, by assumimg that macro definitions were
927 scanned for macro replacements. I have been disabused of this notion,
928 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 929
958541e9
PH
930PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
931 in the smtp transport. When a block could not be written in a single
932 write() function, the timeout was being re-applied to each part-write.
933 This seems wrong - if the receiver was accepting one byte at a time it
934 would take for ever. The timeout is now adjusted when this happens. It
935 doesn't have to be particularly precise.
936
c206415f
TK
937TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
938 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
939
2a4be8f9
PH
940PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
941 without a domain if the check to <postmaster@domain> fails.
942
1cba11c5
SC
943SC/01 Eximstats: added -xls and the ability to specify output files
944 (patch written by Frank Heydlauf).
945
946SC/02 Eximstats: use FileHandles for outputing results.
947
948SC/03 Eximstats: allow any combination of xls, txt, and html output.
949
950SC/04 Eximstats: fixed display of large numbers with -nvr option
951
952SC/05 Eximstats: fixed merging of reports with empty tables.
953
954SC/06 Eximstats: added the -include_original_destination flag
955
956SC/07 Eximstats: removed tabs and trailing whitespace.
957
1005d00e
TK
958TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
959
960TK/06 MBOX spool code: Add real "From " MBOX separator line
961 so the .eml file is really in mbox format (even though
962 most programs do not really care). Patch from Alex Miller.
963
964TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
965 The latter is generated from $received_to and is only set if the
966 message has one envelope recipient. SA can use these headers,
967 obviously out-of-the-box. Patch from Alex Miller.
968
9b4768fa
PH
969PH/08 The ${def test on a variable was returning false if the variable's
970 value was "0", contrary to what the specification has always said!
971 The result should be true unless the variable is empty.
972
973PH/09 The syntax error of a character other than { following "${if
974 def:variable_name" (after optional whitespace) was not being diagnosed.
975 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
976 accidental colon was present, for example, could give incorrect results.
977
0d7eb84a
PH
978PH/10 Tidied the code in a number of places where the st_size field of a stat()
979 result is used (not including appendfile, where other changes are about
980 to be made).
981
982PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
983 This involved changing a lot of size variables from int to off_t. It
984 should work with maildirs and everything.
985
40727bee
TK
986TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
987 spamd dying while we are connected to it.
988
554d2369
TF
989TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
990 <jgh@wizmail.org>
991
1f922db1
PH
992PH/12 Applied Alex Kiernan's patch for the API change for the error callback
993 function for BDB 4.3.
994
ef213c3b
PH
995PH/13 Changed auto_thaw such that it does not apply to bounce messages.
996
8ac170f3
PH
997PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
998 the sources for PCRE have been re-arranged and more files are now
999 involved.
1000
b1c749bb
PH
1001PH/15 The code I had for printing potentially long long variables in PH/11
1002 above was not the best (it lost precision). The length of off_t variables
1003 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
1004 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1005 to be "long long int" or "long int". This is needed for the internal
1006 formatting function string_vformat().
b1c749bb 1007
4aac9b49
PH
1008PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1009 the configuration file to be ":syslog", then the script "guesses" where
1010 the logs files are, rather than using the compiled in default. In our
1011 case the guess is not the same as the compiled default, so the script
1012 suddenly stopped working when I started to use syslog. The patch checks
1013 to see if log_file_path is "". If so, it attempts to read it from exim
1014 with no configuration file to get the compiled in version, before it
1015 falls back to the previous guessing code."
1016
294520c8
TK
1017TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1018 implementing BATV in an Exim configuration. See NewStuff for the gory
1019 details.
1020
5bd022fe
PH
1021PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1022 Makefile that are specific to HP-UX.
1023
90e9ce59
PH
1024PH/18 If the "use_postmaster" option was set for a recipient callout together
1025 with the "random" option, the postmaster address was used as the MAIL
1026 FROM address for the random test, but not for the subsequent recipient
1027 test. It is now used for both.
1028
5ea81592
PH
1029PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1030 patch removes a few documentation additions to RFC 3028, because the
1031 latest draft now contains them. It adds the new en;ascii-case comparator
1032 and a new error check for 8bit text in MIME parts. Comparator and
1033 require names are now matched exactly. I enabled the subaddress
1034 extension, but it is not well tested yet (read: it works for me)."
1035
c6c2dc1d
PH
1036PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1037 rework some of the code of TK/09 above to avoid the hardwired use of
1038 "%lld" and "long long". Replaced the call to snprintf() with a call to
1039 string_vformat().
1040
fffffe4c
PH
1041PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1042 records point to non-existent hosts", "retry timeout exceeded", and
1043 "retry time not reached for any host after a long failure period".
ca02eafb 1044
9a26b6b2
PH
1045PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1046 experimental DomainKeys support:
1047
1048 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1049 (2) On an error such as an illegally used "control", the wrong name for
1050 the control was given.
1051
1052 These problems did NOT occur unless DomainKeys support was compiled.
1053
4aee0225
PH
1054PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1055
32d668a5
PH
1056PH/24 Added ${if match_ip condition.
1057
8187c3f3
PH
1058PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1059 databases so that it will be absolutely obvious if a crash occurs in the
1060 DB library. This is a regular occurrence (often caused by mis-matched
1061 db.h files).
1062
ff790e47 1063PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1064 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1065 picked up on a user's system that detects such things. There doesn't seem
1066 to be a gcc warning option for this - only an attribute that has to be
1067 put on the function's prototype. It seems that in Fedora Core 4 they have
1068 set this on a number of new functions. No doubt there will be more in due
1069 course.
ff790e47 1070
5417f6d1
PH
1071PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1072 specify a transport. However, if an address that was verified by such a
1073 router was the subject of a callout, Exim crashed because it tried to
1074 read the rcpt_include_affixes from the non-existent transport. Now it
1075 just assumes that the setting of that option is false. This bug was
1076 introduced by 4.51/PH/31.
1077
59cf8544
PH
1078PH/28 Changed -d+all to exclude +memory, because that information is very
1079 rarely of interest, but it makes the output a lot bigger. People tend to
1080 do -d+all out of habit.
1081
e7ad8a65
PH
1082PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1083 code in os-type was giving problems when libc.so lives in lib64, like on
1084 x86_64 Fedora Core.
1085
ade42478
PH
1086PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1087 aren't the modern standard, and it seems that some systems' include files
1088 don't always have them. Exim was already checking for some of the newer
1089 ones like T_AAAA, and defining it itself. I've added checks for all the
1090 record types that Exim uses.
1091
182ad5cf
PH
1092PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1093 not automatically generating a new one, as it is supposed to. This
1094 prevented TLS from working. If the file did exist, but contained invalid
1095 data, a new version was generated, as expected. It was only the case of a
1096 non-existent file that was broken.
1097
b0d9fc80
TK
1098TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1099 with a change in libdomainkeys > 0.64.
1100
1101TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1102 from DNS. If the selector record carries the flag, it now has
1103 precedence over the domain-wide flag.
1104
1105TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1106
47c7a64a
PH
1107PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1108 the use of a port name that isn't defined in /etc/services) occurred, the
1109 message was deferred as in a normal delivery, and thus remained on the
1110 spool, instead of being failed because of the mua_wrapper setting. This
1111 is now fixed, and I tidied up some of the mua_wrapper messages at the
1112 same time.
1113
a388bce4
SC
1114SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1115 the messages in a hash of arrays rather than using individual hashes.
1116 This is a bit cleaner and results in dramatic memory savings, albeit
1117 at a slight CPU cost.
1118
1119SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1120 as requested by Marc Sherman.
1121
1122SC/10 Eximstats: added histograms for user specified patterns as requested
1123 by Marc Sherman.
1124
0793e4ed
SC
1125SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1126
c58b88df
PH
1127PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1128 fopen() in the content-scanning modules that did not already have it.
1129
e7ad8a65 1130
7982096b
PH
1131Exim version 4.51
1132-----------------
1133
1a46a8c5
PH
1134TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1135 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1136
2f079f46 1137TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1138
1139TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1140
1141PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1142 to test Sieve filters that use "vacation".
1143
1144PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1145 that changes the way the GnuTLS parameters are stored in the cache file.
1146 The new format can be generated externally. For backward compatibility,
1147 if the data in the cache doesn't make sense, Exim assumes it has read an
1148 old-format file, and it generates new data and writes a new file. This
1149 means that you can't go back to an older release without removing the
1150 file.
1151
1152PH/03 A redirect router that has both "unseen" and "one_time" set does not
1153 work if there are any delivery delays because "one_time" forces the
1154 parent to be marked "delivered", so its unseen clone is never tried
1155 again. For this reason, Exim now forbids the simultaneous setting of
1156 these two options.
1157
1158PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1159 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1160 entry if you want to know the details. The fix, however, neglected to
1161 consider the case when local delivery batching is involved. The test for
1162 "previously delivered" was not happening when checking to see if an
1163 address could be batched with a previous (undelivered) one; under
1164 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1165 address.
1a46a8c5
PH
1166
1167PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1168 in its include files, and this causes problems building Exim.
1169
1170PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1171 header_syntax) but Exim was just ignoring anything given after a slash.
1172 In particular, this caused confusion with an attempt to use "verify =
1173 reverse_host_lookup/defer_ok". An error is now given when options are
1174 supplied for verify items that do not have them. (Maybe reverse_host_
1175 lookup should have a defer_ok option, but that's a different point.)
1176
1177PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1178 defined by RFC 821) to 2048, because there were problems with some AUTH
1179 commands, and RFC 1869 says the size should be increased for extended
1180 SMTP commands that take arguments.
1181
1182PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1183 Finch).
1184
1185PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1186 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1187
49c2d5ea
PH
1188PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1189 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1190 whatever). Otherwise the password may appear in the log. Following change
1191 PH/42 below, there is no longer a chance of it appearing in a bounce
1192 message.
49c2d5ea 1193
bf759a8b
PH
1194PH/11 Installed exipick version 20050225.0 from John Jetmore.
1195
83364d30
PH
1196PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1197 of its addresses was ever tried. (Bugzilla bug #2.)
1198
7999bbd7
PH
1199PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1200 the result incorrectly in the debug output. (It correctly added a newline
1201 to what was transported.)
1202
7dbf77c9
PH
1203TF/01 Added $received_time.
1204
74e0617f
PH
1205PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1206 commented out examples of how to interface to a virus scanner and to
1207 SpamAssassin. Also added commented examples of av_scanner and
1208 spamd_address settings.
1209
2f079f46
PH
1210PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1211 and controls are allowed in which ACLs. There were a couple of minor
1212 errors. Some of the entries in the conditions table (which is a table of
1213 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1214 negation of where the condition IS allowed.
1215
8c841523
PH
1216PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1217
7766a4f0
PH
1218PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1219 header file does not have a version number, so I've had to invent a new
1220 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1221 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1222 radiusclient), but it was contributed by a Radius user.
1223
8b417f2c
PH
1224PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1225 files or directories, for OpenSSL.
1226
901f42cb
PH
1227PH/19 When an Exim process that is running as root has to create an Exim log
1228 file, it does so in a subprocess that runs as exim:exim so as to get the
1229 ownership right at creation (otherwise, other Exim processes might see
1230 the file with the wrong ownership). There was no test for failure of this
1231 fork() call, which would lead to the process getting stuck as it waited
1232 for a non-existent subprocess. Forks do occasionally fail when resources
1233 run out. I reviewed all the other calls to fork(); they all seem to check
1234 for failure.
1235
f9b9210e
PH
1236PH/20 When checking for unexpected SMTP input at connect time (before writing
1237 the banner), Exim was not dealing correctly with a non-positive return
1238 from the read() function. If the client had disconnected by this time,
1239 the result was a log entry for a synchronization error with an empty
1240 string after "input=" when read() returned zero. If read() returned -1
1241 (an event I could not check), uninitialized data bytes were printed.
1242 There were reports of junk text (parts of files, etc) appearing after
1243 "input=".
1244
54cdb463
PH
1245PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1246
cf00dad6
PH
1247PH/22 Added support for macro redefinition, and (re)definition in between
1248 driver and ACL definitions.
1249
acb1b346
PH
1250PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1251 forgetting to use the resulting value; it was using the unexpanded value.
1252
c5ddb310
PH
1253PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1254 hadn't been configured. The fix is from Juergen Kreileder, who
1255 understands it better than I do:
1256
1257 "Here's what I see happening with three configured cyrus_sasl
1258 authenticators configured (plain, login, cram-md5):
1259
1260 On startup auth_cyrus_sasl_init() gets called for each of these.
1261 This means three calls to sasl_listmech() without a specified mech_list.
1262 => SASL tests which mechs of all available mechs actually work
1263 => three warnings about OTP not working
1264 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1265
1266 With the patch, sasl_listmech() also gets called three times. But now
1267 SASL's mech_list option is set to the server_mech specified in the the
1268 authenticator. Or in other words, the answer from sasl_listmech()
1269 gets limited to just the mech you're testing for (which is different
1270 for each call.)
1271 => the return list contains just 'plain' or 'login', 'cram-md5' or
1272 nothing depending on the value of ob->server_mech.
1273
1274 I've just tested the patch: Authentication still works fine,
1275 unavailable mechs specified in the exim configuration are still
1276 caught, and the auth.log warnings about OTP are gone."
1277
31619da6
PH
1278PH/25 When debugging is enabled, the contents of the command line are added
1279 to the debugging output, even when log_selector=+arguments is not
1280 specified.
1281
bebaf0fc
PH
1282PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1283 answer is "GNU", and only if the return is "GNU/something" is the answer
1284 "Linux".
1285
475fe28a
PH
1286PH/27 $acl_verify_message is now set immediately after the failure of a
1287 verification in an ACL, and so is available in subsequent modifiers. In
1288 particular, the message can be preserved by coding like this:
1289
1290 warn !verify = sender
1291 set acl_m0 = $acl_verify_message
1292
1293 Previously, $acl_verify_message was set only while expanding "message"
1294 and "log_message" when a very denied access.
1295
7e8bec7a
PH
1296PH/28 Modified OS/os.c-Linux with
1297
1298 -#ifndef OS_LOAD_AVERAGE
1299 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1300
1301 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1302 nomenclature these days.)
1303
e4a89c47
PH
1304PH/29 Installed patch from the Sieve maintainer that adds the options
1305 sieve_useraddress and sieve_subaddress to the redirect router.
1306
5ca2a9a1
PH
1307PH/30 In these circumstances:
1308 . Two addresses routed to the same list of hosts;
1309 . First host does not offer TLS;
1310 . First host accepts first address;
1311 . First host gives temporary error to second address;
1312 . Second host offers TLS and a TLS session is established;
1313 . Second host accepts second address.
1314 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1315 and peerdn, if requested) that were in fact used only for the second
1316 address.
7e8bec7a 1317
c688b954
PH
1318PH/31 When doing a callout as part of verifying an address, Exim was not paying
1319 attention to any local part prefix or suffix that was matched by the
1320 router that accepted the address. It now behaves in the same way as it
1321 does for delivery: the affixes are removed from the local part unless
1322 rcpt_include_affixes is set on the transport.
1323
fed77020
PH
1324PH/32 Add the sender address, as F=<...>, to the log line when logging a
1325 timeout during the DATA phase of an incoming message.
1326
7fe1560f
PH
1327PH/33 Sieve envelope tests were broken for match types other than :is. I have
1328 applied a patch sanctioned by the Sieve maintainer.
c688b954 1329
ebb6e6d5
PH
1330PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1331 the uid or gid is negative. A case of a negative gid caused this to be
1332 noticed. The fix allows for either to be negative.
1333
9c4e8f60
PH
1334PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1335 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1336 overlooked.
1337
1338PH/36 The change PH/12 above was broken. Fixed it.
1339
d7174846
PH
1340PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1341 the grounds that routing the same address twice would always produce the
1342 same answer. This might have been true once, but it is certainly no
1343 longer true now. Routing a child address may depend on the previous
1344 routing that produced that child. Some complicated redirection strategies
1345 went wrong when messages had multiple recipients, and made Exim's
1346 behaviour dependent on the order in which the addresses were given.
1347
1348 I have moved the duplicate checking until after the routing is complete.
1349 Exim scans the addresses that are assigned to local and remote
1350 transports, and removes any duplicates. This means that more work will be
1351 done, as duplicates will always all be routed, but duplicates are
1352 presumably rare, so I don't expect this is of any significance.
1353
1354 For deliveries to pipes, files, and autoreplies, the duplicate checking
1355 still happens during the routing process, since they are not going to be
1356 routed further.
1357
cfe75fc3
PH
1358PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1359 It corrects a timeout issue with spamd. This is Ian's comment: "The
1360 background is that sometimes spamd either never reads data from a
1361 connection it has accepted, or it never writes response data. The exiscan
1362 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1363 blindly assumes that writes won't block so it may never time out."
1364
be22d70e
PH
1365PH/39 Allow G after quota size as well as K and M.
1366
0612b098
PH
1367PH/40 The value set for $authenticated_id in an authenticator may not contain
1368 binary zeroes or newlines because the value is written to log lines and
1369 to spool files. There was no check on this. Now the value is run through
1370 the string_printing() function so that such characters are converted to
1371 printable escape sequences.
1372
2e0c1448
PH
1373PH/41 $message_linecount is a new variable that contains the total number of
1374 lines in the message. Compare $body_linecount, which is the count for the
1375 body only.
1376
447d236c
PH
1377PH/42 Exim no longer gives details of delivery errors for specific addresses in
1378 bounce and delay warning messages, except in certain special cases, which
1379 are as follows:
1380
1381 (a) An SMTP error message from a remote host;
1382 (b) A message specified in a :fail: redirection;
1383 (c) A message specified in a "fail" command in a system filter;
1384 (d) A message specified in a FAIL return from the queryprogram router;
1385 (e) A message specified by the cannot_route_message router option.
1386
1387 In these cases only, Exim does include the error details in bounce and
1388 warning messages. There are also a few cases where bland messages such
1389 as "unrouteable address" or "local delivery error" are given.
1390
d20976dc
PH
1391PH/43 $value is now also set for the "else" part of a ${run expansion.
1392
f656d135
PH
1393PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1394 being worked on, but at least Exim now implements the latest version to
1395 play with."
1396
2e2a30b4
PH
1397PH/45 In a pipe transport, although a timeout while waiting for the pipe
1398 process to complete was treated as a delivery failure, a timeout while
1399 writing the message to the pipe was logged, but erroneously treated as a
1400 successful delivery. Such timeouts include transport filter timeouts. For
1401 consistency with the overall process timeout, these timeouts are now
1402 treated as errors, giving rise to delivery failures by default. However,
1403 there is now a new Boolean option for the pipe transport called
1404 timeout_defer, which, if set TRUE, converts the failures into defers for
1405 both kinds of timeout. A transport filter timeout is now identified in
1406 the log output.
1407
9176e9f0
PH
1408PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1409 systems where "make" and "gmake" are different, calling "gmake" at top
1410 level broke things. I've arranged for the value of $(MAKE) to be passed
1411 from the Makefile to this script so that it can call the same version of
1412 "make".
1413
7982096b 1414
bbe902f0
PH
1415A note about Exim versions 4.44 and 4.50
1416----------------------------------------
1417
1418Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1419changes of various kinds. As a consequence, a big documentation update was
1420needed. This delayed the release for rather longer than seemed good, especially
1421in the light of a couple of (minor) security issues. Therefore, the changes
1422that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1423release. So 4.44 and 4.50 are in effect two different branches that both start
1424from 4.43.
1425
1426I have left the 4.50 change log unchanged; it contains all the changes since
14274.43. The change log for 4.44 is below; many of its items are identical to
1428those for 4.50. This seems to be the most sensible way to preserve the
1429historical information.
1430
1431
f7b63901 1432Exim version 4.50
495ae4b0
PH
1433-----------------
1434
5fe762f6
PH
1435 1. Minor wording change to the doc/README.SIEVE file.
1436
139059f6 1437 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1438 computation of the current number of files was incorrect.
495ae4b0 1439
7086e875
PH
1440 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1441 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1442 place.
1443
35af9f61
PH
1444 4. Give more explanation in the error message when the command for a transport
1445 filter fails to execute.
1446
b668c215
PH
1447 5. There are several places where Exim runs a non-Exim command in a
1448 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1449 was being done only for the command run by the queryprogram router. It is
1450 now done for all such subprocesses. The other cases are: ${run, transport
1451 filters, and the commands run by the lmtp and pipe transports.
1452
a494b1e1
PH
1453 6. Added CONFIGURE_GROUP build-time option.
1454
1455 7. Some older OS have a limit of 256 on the maximum number of file
1456 descriptors. Exim was using setrlimit() to set 1000 as a large value
1457 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1458 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1459
c5fcb476
PH
1460 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1461 was an oversight, and furthermore, ever since the addition of extra
1462 controls (e.g. 4.43/32), the checks on when to allow different forms of
1463 "control" were broken. There should now be diagnostics for all cases when a
1464 control that does not make sense is encountered.
1465
69358f02
PH
1466 9. Added the /retain_sender option to "control=submission".
1467
5be20824
PH
146810. $recipients is now available in the predata ACL (oversight).
1469
eb2c0248
PH
147011. Tidy the search cache before the fork to do a delivery from a message
1471 received from the command line. Otherwise the child will trigger a lookup
1472 failure and thereby defer the delivery if it tries to use (for example) a
1473 cached ldap connection that the parent has called unbind on.
1474
2a3eea10
PH
147512. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1476 of $address_data from the recipient verification was clobbered by the
1477 sender verification.
1478
147913. The value of address_data from a sender verification is now available in
1480 $sender_address_data in subsequent conditions in the ACL statement.
1481
23c7ff99
PH
148214. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1483
4deaf07d
PH
148415. Added a new option "connect=<time>" to callout options, to set a different
1485 connection timeout.
1486
926e1192
PH
148716. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1488 was its contents. (It was OK if the option was not defined at all.)
1489
650edc6f
PH
149017. A "Completed" log line is now written for messages that are removed from
1491 the spool by the -Mrm option.
1492
2c7db3f5
PH
149318. New variables $sender_verify_failure and $recipient_verify_failure contain
1494 information about exactly what failed.
1495
3d235903
PH
149619. Added -dd to debug only the daemon process.
1497
7c7ad977
PH
149820. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1499 handles timeouts, both on the server side and network timeouts. Renamed the
1500 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1501
981756db
PH
150221. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1503 It is now set to "smtps".
1504
d4eb88df
PH
150522. $host_address is now set to the target address during the checking of
1506 ignore_target_hosts.
1507
150823. When checking ignore_target_hosts for an ipliteral router, no host name was
1509 being passed; this would have caused $sender_host_name to have been used if
1510 matching the list had actually called for a host name (not very likely,
1511 since this list is usually IP addresses). A host name is now passed as
1512 "[x.x.x.x]".
1513
7d468ab8
PH
151424. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1515 code that specifies a non-restarting handler (typically sigaction() in
1516 modern systems) in an attempt to fix a rare and obscure crash bug.
1517
151825. Narrowed the window for a race in the daemon that could cause it to ignore
1519 SIGCHLD signals. This is not a major problem, because they are used only to
1520 wake it up if nothing else does.
1521
62c0818f
PH
152226. A malformed maildirsize file could cause Exim to calculate negative values
1523 for the mailbox size or file count. Odd effects could occur as a result.
1524 The maildirsize information is now recalculated if the size or filecount
1525 end up negative.
1526
26034054
PH
152727. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1528 support for a long time. Removed HAVE_SYS_VFS_H.
1529
af66f652
PH
153028. Installed the latest version of exipick from John Jetmore.
1531
90af77f4
PH
153229. In an address list, if the pattern was not a regular expression, an empty
1533 subject address (from a bounce message) matched only if the pattern was an
1534 empty string. Non-empty patterns were not even tested. This was the wrong
1535 because it is perfectly reasonable to use an empty address as part of a
1536 database query. An empty address is now tested by patterns that are
1537 lookups. However, all the other forms of pattern expect the subject to
1538 contain a local part and a domain, and therefore, for them, an empty
1539 address still always fails if the pattern is not itself empty.
1540
d8ef3577
PH
154130. Exim went into a mad DNS loop when attempting to do a callout where the
1542 host was specified on an smtp transport, and looking it up yielded more
1543 than one IP address.
1544
5cb8cbc6
PH
154531. Re-factored the code for checking spool and log partition space into a
1546 function that finds that data and another that does the check. The former
1547 is then used to implement four new variables: $spool_space, $log_space,
1548 $spool_inodes, and $log_inodes.
1549
14702f5b
PH
155032. The RFC2047 encoding function was originally intended for short strings
1551 such as real names; it was not keeping to the 75-character limit for
1552 encoded words that the RFC imposes. It now respects the limit, and
1553 generates multiple encoded words if necessary. To be on the safe side, I
1554 have increased the buffer size for the ${rfc2047: expansion operator from
1555 1024 to 2048 bytes.
1556
063b1e99
PH
155733. It is now permitted to omit both strings after an "if" condition; if the
1558 condition is true, the result is "true". As before, when the second string
1559 is omitted, a false condition yields an empty string. This makes it less
1560 cumbersome to write custom ACL and router conditions.
1561
652e1b65
PH
156234. Failure to deliver a bounce message always caused it to be frozen, even if
1563 there was an errors_to setting on the router. The errors_to setting is now
1564 respected.
1565
6f0c9a4f
PH
156635. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1567 canonical form (fully expanded) before being placed in
1568 $sender_host_address.
1569
33397d19
PH
157036. The table in the code that translates DNS record types into text (T_A to
1571 "A" for instance) was missing entries for NS and CNAME. It is just possible
1572 that this could have caused confusion if both these types were looked up
1573 for the same domain, because the text type is used as part of Exim's
1574 per-process caching. But the chance of anyone hitting this buglet seems
1575 very small.
1576
7bb56e1f
PH
157737. The dnsdb lookup has been extended in a number of ways.
1578
1579 (1) There is a new type, "zns", which walks up the domain tree until it
1580 finds some nameserver records. It should be used with care.
1581
ea3bc19b
PH
1582 (2) There is a new type, "mxh", which is like "mx" except that it returns
1583 just the host names, not the priorities.
1584
1585 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1586 looked up. The behaviour when one of the lookups defers can be
1587 controlled by a keyword.
7bb56e1f 1588
ea3bc19b 1589 (4) It is now possible to specify the separator character for use when
7bb56e1f 1590 multiple records are returned.
33397d19 1591
0bcb2a0e
PH
159238. The dnslists ACL condition has been extended: it is now possible to supply
1593 a list of IP addresses and/or domains to be looked up in a particular DNS
1594 domain.
1595
2ac0e484
PH
159639. Added log_selector=+queue_time_overall.
1597
4e1fde53
PH
159840. When running the queue in the test harness, wait just a tad after forking a
1599 delivery process, to get repeatability of debugging output.
1600
de365ded
PH
160141. Include certificate and key file names in error message when GnuTLS fails
1602 to set them up, because the GnuTLS error message doesn't include the name
1603 of the failing file when there is a problem reading it.
1604
f05da2e8
PH
160542. Allow both -bf and -bF in the same test run.
1606
d6453af2
PH
160743. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1608
f7b63901
PH
160944. The "Exiscan patch" is now merged into the mainline Exim source.
1610
161145. Sometimes the final signoff response after QUIT could fail to get
1612 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1613 < 0 before doing a fflush(). This bug looks as though it goes back to the
1614 introduction of TLS in release 3.20, but "sometimes" must have been rare
1615 because the tests only now provoked it.
1616
a444213a
PH
161746. Reset the locale to "C" after calling embedded Perl, in case it was changed
1618 (this can affect the format of dates).
1619
0ec020ea
PH
162047. exim_tidydb, when checking for the continued existence of a message for
1621 which it has found a message-specific retry record, was not finding
1622 messages that were in split spool directories. Consequently, it was
1623 deleting retry records that should have stayed in existence.
1624
b1206957
PH
162548. Steve fixed some bugs in eximstats.
1626
162749. The SPA authentication driver was not abandoning authentication and moving
1628 on to the next authenticator when an expansion was forced to fail,
1629 contradicting the general specification for all authenticators. Instead it
1630 was generating a temporary error. It now behaves as specified.
1631
26dd5a95
PH
163250. The default ordering of permitted cipher suites for GnuTLS was pessimal
1633 (the order specifies the preference for clients). The order is now AES256,
1634 AES128, 3DES, ARCFOUR128.
1635
343b2385
PH
163651. Small patch to Sieve code - explicitly set From: when generating an
1637 autoreply.
1638
1c5466b9
PH
163952. Exim crashed if a remote delivery caused a very long error message to be
1640 recorded - for instance if somebody sent an entire SpamAssassin report back
1641 as a large number of 550 error lines. This bug was coincidentally fixed by
1642 increasing the size of one of Exim's internal buffers (big_buffer) that
1643 happened as part of the Exiscan merge. However, to be on the safe side, I
1644 have made the code more robust (and fixed the comments that describe what
1645 is going on).
1646
55ee9ee3
PH
164753. Now that there can be additional text after "Completed" in log lines (if
1648 the queue_time_overall log selector is set), a one-byte patch to exigrep
1649 was needed to allow it to recognize "Completed" as not the last thing in
1650 the line.
1651
d38f8232
PH
165254. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1653 patch that reportedly fixes this has been added. I am not expert enough to
1654 create a test for it. This is what the patch creator wrote:
1655
1656 "I found a little strange behaviour of ldap code when working with
1657 Windows 2003 AD Domain, where users was placed in more than one
1658 Organization Units. When I tried to give exim partial DN, the exit code
1659 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1660 But simultaneously result of request was absolutely normal ldap result,
1661 so I produce this patch..."
1662
3295e65b
PH
1663 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1664 REFERENCE, so I have modified the code to exclude the patch when that macro
1665 is not defined.
1666
7102e136
PH
166755. Some experimental protocols are using DNS PTR records for new purposes. The
1668 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1669 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1670 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1671 CAN-2005-0021
7102e136 1672
3ca0ba97
PH
167356. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1674
c2bcbe20
PH
167557. Double the size of the debug message buffer (to 2048) so that more of very
1676 long debug lines gets shown.
1677
18ce445d
PH
167858. The exicyclog utility now does better if the number of log files to keep
1679 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1680
1f5b4c3d
PH
168159. Two changes related to the smtp_active_hostname option:
1682
1683 (1) $smtp_active_hostname is now available as a variable.
1684 (2) The default for smtp_banner uses $smtp_active_hostname instead
1685 of $primary_hostname.
1686
b975ba52
PH
168760. The host_aton() function is supposed to be passed a string that is known
1688 to be a valid IP address. However, in the case of IPv6 addresses, it was
1689 not checking this. This is a hostage to fortune. Exim now panics and dies
1690 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1691 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1692 components; fortuitously, this particular loophole had already been fixed
1693 by change 4.50/55 above.
1694
1695 If there are any other similar loopholes, the new check in host_aton()
1696 itself should stop them being exploited. The report I received stated that
1697 data on the command line could provoke the exploit when Exim was running as
1698 exim, but did not say which command line option was involved. All I could
1699 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1700 running as the user.
ea3a6f44 1701 CAN-2005-0021
85b87bc2
PH
1702
170361. There was a buffer overflow vulnerability in the SPA authentication code
1704 (which came originally from the Samba project). I have added a test to the
1705 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1706 CAN-2005-0022
b975ba52 1707
17ffcae7
PH
170862. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1709 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1710
d95f9fdb
PH
171163. The daemon start-up calls getloadavg() while still root for those OS that
1712 need the first call to be done as root, but it missed one case: when
1713 deliver_queue_load_max is set with deliver_drop_privilege. This is
1714 necessary for the benefit of the queue runner, because there is no re-exec
1715 when deliver_drop_privilege is set.
1716
86b8287f
PH
171764. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1718 This has been fixed.
1719
60dc5e56
PH
172065. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1721 was in use, was not putting the data itself into the right store pool;
1722 consequently, it could be overwritten for a subsequent message in the same
1723 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1724 the caching.)
1725
533244af
PH
172666. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1727
a5a28604
PH
172867. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1729 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1730 the function were treating the return as a boolean value, which happened to
1731 work because 0=false and not-0=true, but is not correct code.
1732
7e634d24
PH
173368. The host_aton() function was not handling scoped IPv6 addresses (those
1734 with, for example, "%eth0" on the end) correctly.
1735
3e11c26b
PH
173669. Fixed some compiler warnings in acl.c for the bitmaps specified with
1737 negated items (that is, ~something) in unsigned ints. Some compilers
1738 apparently mutter when there is no cast.
1739
6729cf78
PH
174070. If an address verification called from an ACL failed, and did not produce a
1741 user-specific message (i.e. there was only a "system" message), nothing was
1742 put in $acl_verify_message. In this situation, it now puts the system
1743 message there.
1744
00f00ca5
PH
174571. Change 4.23/11 added synchronization checking at the start of an SMTP
1746 session; change 4.31/43 added the unwanted input to the log line - except
1747 that it did not do this in the start of session case. It now does.
1748
c9bdd01c
PH
174972. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1750 This is wrong and can cause the other end to generate a synchronization
1751 error if it is another Exim or anything else that does the synchronization
1752 check. A QUIT command is no longer sent after a timeout.
1753
d43194df
PH
175473. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1755 during host lookups.
1756
fe5b5d0b
PH
175774. The defer_ok option of callout verification was not working if it was used
1758 when verifying addresses in header lines, that is, for this case:
1759
1760 verify = header_sender/callout=defer_ok
1761
76a2d7ba
PH
176275. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1763 those file descriptors could be used for SMTP connections. If anything
1764 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1765 could be sent to the SMTP client, causing chaos. The daemon now opens
1766 stdin, stdout, and stderr to /dev/null when it puts itself into the
1767 background.
1768
176976. Arrange for output from Perl's "warn" command to be written to Exim's main
1770 log by default. The user can override this with suitable Perl magic.
1771
04f7d5b9
PH
177277. The use of log_message on a "discard" ACL verb, which is supposed to add to
1773 the log message when discard triggers, was not working for the DATA ACL or
1774 for the non-SMTP ACL.
1775
bc60667e
PH
177678. Error message wording change in sieve.c.
1777
bb6e88ff
PH
177879. If smtp_accept_max_per_host was set, the number of connections could be
1779 restricted to fewer than expected, because the daemon was trying to set up
1780 a new connection before checking whether the processes handling previous
1781 connections had finished. The check for completed processes is now done
1782 earlier. On busy systems, this bug wouldn't be noticed because something
1783 else would have woken the daemon, and it would have reaped the completed
1784 process earlier.
1785
1e70f85b
PH
178680. If a message was submitted locally by a user whose login name contained one
1787 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1788 It caused a spool format error. I have fixed the spool reading code. A
1789 related problem was that the "from" clause in the Received: line became
1790 illegal because of the space(s). It is now covered by ${quote_local_part.
1791
179281. Included the latest eximstats from Steve (adds average sizes to HTML Top
1793 tables).
1794
4e01f9d6
PH
179582. Updated OS/Makefile-AIX as per message from Mike Meredith.
1796
1ee1cef2
PH
179783. Patch from Sieve maintainer to fix unterminated string problem in
1798 "vacation" handling.
1799
6e2b4ccc
PH
180084. Some minor changes to the Linux configuration files to help with other
1801 OS variants using glibc.
1802
8e669ac1
PH
180385. One more patch for Sieve to update vacation handling to latest spec.
1804
495ae4b0 1805
bbe902f0
PH
1806----------------------------------------------------
1807See the note above about the 4.44 and 4.50 releases.
1808----------------------------------------------------
1809
1810
1811Exim version 4.44
1812-----------------
1813
1814 1. Change 4.43/35 introduced a bug that caused file counts to be
1815 incorrectly computed when quota_filecount was set in an appendfile
1816 transport
1817
1818 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1819 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1820 place.
1821
1822 3. Give more explanation in the error message when the command for a transport
1823 filter fails to execute.
1824
1825 4. There are several places where Exim runs a non-Exim command in a
1826 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1827 was being done only for the command run by the queryprogram router. It is
1828 now done for all such subprocesses. The other cases are: ${run, transport
1829 filters, and the commands run by the lmtp and pipe transports.
1830
1831 5. Some older OS have a limit of 256 on the maximum number of file
1832 descriptors. Exim was using setrlimit() to set 1000 as a large value
1833 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1834 systems. I've change it so that if it can't get 1000, it tries for 256.
1835
1836 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1837 was an oversight, and furthermore, ever since the addition of extra
1838 controls (e.g. 4.43/32), the checks on when to allow different forms of
1839 "control" were broken. There should now be diagnostics for all cases when a
1840 control that does not make sense is encountered.
1841
1842 7. $recipients is now available in the predata ACL (oversight).
1843
1844 8. Tidy the search cache before the fork to do a delivery from a message
1845 received from the command line. Otherwise the child will trigger a lookup
1846 failure and thereby defer the delivery if it tries to use (for example) a
1847 cached ldap connection that the parent has called unbind on.
1848
1849 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1850 of $address_data from the recipient verification was clobbered by the
1851 sender verification.
1852
185310. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1854 was its contents. (It was OK if the option was not defined at all.)
1855
185611. A "Completed" log line is now written for messages that are removed from
1857 the spool by the -Mrm option.
1858
185912. $host_address is now set to the target address during the checking of
1860 ignore_target_hosts.
1861
186213. When checking ignore_target_hosts for an ipliteral router, no host name was
1863 being passed; this would have caused $sender_host_name to have been used if
1864 matching the list had actually called for a host name (not very likely,
1865 since this list is usually IP addresses). A host name is now passed as
1866 "[x.x.x.x]".
1867
186814. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1869 code that specifies a non-restarting handler (typically sigaction() in
1870 modern systems) in an attempt to fix a rare and obscure crash bug.
1871
187215. Narrowed the window for a race in the daemon that could cause it to ignore
1873 SIGCHLD signals. This is not a major problem, because they are used only to
1874 wake it up if nothing else does.
1875
187616. A malformed maildirsize file could cause Exim to calculate negative values
1877 for the mailbox size or file count. Odd effects could occur as a result.
1878 The maildirsize information is now recalculated if the size or filecount
1879 end up negative.
1880
188117. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1882 support for a long time. Removed HAVE_SYS_VFS_H.
1883
ea3a6f44 188418. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1885
188619. Allow an empty sender to be matched against a lookup in an address list.
1887 Previously the only cases considered were a regular expression, or an
1888 empty pattern.
1889
189020. Exim went into a mad DNS lookup loop when doing a callout where the
1891 host was specified on the transport, if the DNS lookup yielded more than
1892 one IP address.
1893
ea3a6f44
NM
189421. The RFC2047 encoding function was originally intended for short strings
1895 such as real names; it was not keeping to the 75-character limit for
1896 encoded words that the RFC imposes. It now respects the limit, and
1897 generates multiple encoded words if necessary. To be on the safe side, I
1898 have increased the buffer size for the ${rfc2047: expansion operator from
1899 1024 to 2048 bytes.
bbe902f0 1900
ea3a6f44
NM
190122. Failure to deliver a bounce message always caused it to be frozen, even if
1902 there was an errors_to setting on the router. The errors_to setting is now
1903 respected.
bbe902f0
PH
1904
190523. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1906 canonical form (fully expanded) before being placed in
1907 $sender_host_address.
1908
190924. Updated eximstats to version 1.33
1910
ea3a6f44
NM
191125. Include certificate and key file names in error message when GnuTLS fails
1912 to set them up, because the GnuTLS error message doesn't include the name
1913 of the failing file when there is a problem reading it.
bbe902f0
PH
1914
191526. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1916 As per change 25.
bbe902f0 1917
ea3a6f44
NM
191827. Reset the locale to "C" after calling embedded Perl, in case it was changed
1919 (this can affect the format of dates).
bbe902f0 1920
ea3a6f44
NM
192128. exim_tidydb, when checking for the continued existence of a message for
1922 which it has found a message-specific retry record, was not finding
1923 messages that were in split spool directories. Consequently, it was
1924 deleting retry records that should have stayed in existence.
bbe902f0
PH
1925
192629. eximstats updated to version 1.35
1927 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1928 1.35 - bugfix such that pie charts by volume are generated correctly
1929
ea3a6f44
NM
193030. The SPA authentication driver was not abandoning authentication and moving
1931 on to the next authenticator when an expansion was forced to fail,
1932 contradicting the general specification for all authenticators. Instead it
1933 was generating a temporary error. It now behaves as specified.
bbe902f0 1934
ea3a6f44
NM
193531. The default ordering of permitted cipher suites for GnuTLS was pessimal
1936 (the order specifies the preference for clients). The order is now AES256,
1937 AES128, 3DES, ARCFOUR128.
bbe902f0 1938
ea3a6f44
NM
193931. Small patch to Sieve code - explicitly set From: when generating an
1940 autoreply.
bbe902f0 1941
ea3a6f44
NM
194232. Exim crashed if a remote delivery caused a very long error message to be
1943 recorded - for instance if somebody sent an entire SpamAssassin report back
1944 as a large number of 550 error lines. This bug was coincidentally fixed by
1945 increasing the size of one of Exim's internal buffers (big_buffer) that
1946 happened as part of the Exiscan merge. However, to be on the safe side, I
1947 have made the code more robust (and fixed the comments that describe what
1948 is going on).
bbe902f0 1949
ea3a6f44
NM
195033. Some experimental protocols are using DNS PTR records for new purposes. The
1951 keys for these records are domain names, not reversed IP addresses. The
1952 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1953 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1954 CAN-2005-0021
1955
ea3a6f44
NM
195634. The host_aton() function is supposed to be passed a string that is known
1957 to be a valid IP address. However, in the case of IPv6 addresses, it was
1958 not checking this. This is a hostage to fortune. Exim now panics and dies
1959 if the condition is not met. A case was found where this could be provoked
1960 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1961 components; fortuitously, this particular loophole had already been fixed
1962 by change 4.50/55 or 4.44/33 above.
1963
1964 If there are any other similar loopholes, the new check in host_aton()
1965 itself should stop them being exploited. The report I received stated that
1966 data on the command line could provoke the exploit when Exim was running as
1967 exim, but did not say which command line option was involved. All I could
1968 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1969 running as the user.
bbe902f0
PH
1970 CAN-2005-0021
1971
ea3a6f44
NM
197235. There was a buffer overflow vulnerability in the SPA authentication code
1973 (which came originally from the Samba project). I have added a test to the
1974 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1975 CAN-2005-0022
1976
ea3a6f44
NM
197736. The daemon start-up calls getloadavg() while still root for those OS that
1978 need the first call to be done as root, but it missed one case: when
1979 deliver_queue_load_max is set with deliver_drop_privilege. This is
1980 necessary for the benefit of the queue runner, because there is no re-exec
1981 when deliver_drop_privilege is set.
bbe902f0 1982
ea3a6f44
NM
198337. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1984 was in use, was not putting the data itself into the right store pool;
1985 consequently, it could be overwritten for a subsequent message in the same
1986 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1987 the caching.)
bbe902f0 1988
ea3a6f44
NM
198938. Sometimes the final signoff response after QUIT could fail to get
1990 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1991 < 0 before doing a fflush(). This bug looks as though it goes back to the
1992 introduction of TLS in release 3.20, but "sometimes" must have been rare
1993 because the tests only now provoked it.
bbe902f0
PH
1994
1995
495ae4b0
PH
1996Exim version 4.43
1997-----------------
1998
1999 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2000 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2001 Now it returns an integer. A number of calls were still expecting a T/F
2002 return. Fortuitously, in all cases, the tests worked in OK situations,
2003 which is the norm. However, things would have gone wrong on any write
2004 failures on the smtp file descriptor. This function is used when sending
2005 messages over SMTP and also when doing verify callouts.
2006
2007 2. When Exim is called to do synchronous delivery of a locally submitted
2008 message (the -odf or -odi options), it no longer closes stderr before doing
2009 the delivery.
2010
2011 3. Implemented the mua_wrapper option.
2012
2013 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2014
2015 5. Implemented the functions header_remove(), header_testname(),
2016 header_add_at_position(), and receive_remove_recipient(), and exported them
2017 to local_scan().
2018
2019 6. If an ACL "warn" statement specified the addition of headers, Exim already
2020 inserted X-ACL-Warn: at the start if there was no header name. However, it
2021 was not making this test for the second and subsequent header lines if
2022 there were newlines in the string. This meant that an invalid header could
2023 be inserted if Exim was badly configured.
2024
2025 7. Allow an ACL "warn" statement to add header lines at the start or after all
2026 the Received: headers, as well as at the end.
2027
2028 8. Added the rcpt_4xx retry error code.
2029
2030 9. Added postmaster_mailfrom=xxx to callout verification option.
2031
203210. Added mailfrom=xxxx to the callout verification option, for verify=
2033 header_sender only.
2034
203511. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2036 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2037
203812. Inserted some casts to stop certain compilers warning when using pointer
2039 differences as field lengths or precisions in printf-type calls (mostly
2040 affecting debugging statements).
2041
204213. Added optional readline() support for -be (dynamically loaded).
2043
204414. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2045 same clock tick as a message's arrival, so that its received time was the
2046 same as the "first fail" time on the retry record, and that message
2047 remained on the queue past the ultimate address timeout, every queue runner
2048 would try a delivery (because it was past the ultimate address timeout) but
2049 after another failure, the ultimate address timeout, which should have then
2050 bounced the address, did not kick in. This was a "< instead of <=" error;
2051 in most cases the first failure would have been in the next clock tick
2052 after the received time, and all would be well.
2053
205415. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2055 being recognized when the domain list was tested by the match_domain
2056 condition in an expansion string.
2057
205816. Added the ${str2b64: operator.
2059
206017. Exim was always calling setrlimit() to set a large limit for the number of
2061 processes, without checking whether the existing limit was already
2062 adequate. (It did check for the limit on file descriptors.) Furthermore,
2063 errors from getrlimit() and setrlimit() were being ignored. Now they are
2064 logged to the main and panic logs, but Exim does carry on, to try to do its
2065 job under whatever limits there are.
2066
206718. Imported PCRE 5.0.
2068
206919. Trivial typo in log message " temporarily refused connection" (the leading
2070 space).
2071
207220. If the log selector return_path_on_delivery was set and an address was
2073 redirected to /dev/null, the delivery process crashed because it assumed
2074 that a return path would always be set for a "successful" delivery. In this
2075 case, the whole delivery is bypassed as an optimization, and therefore no
2076 return path is set.
2077
207821. Internal re-arrangement: the function for sending a challenge and reading
2079 a response while authentication was assuming a zero-terminated challenge
2080 string. It's now changed to take a pointer and a length, to allow for
2081 binary data in such strings.
2082
208322. Added the cyrus_sasl authenticator (code supplied by MBM).
2084
208523. Exim was not respecting finduser_retries when seeking the login of the
2086 uid under which it was called; it was always trying 10 times. (The default
2087 setting of finduser_retries is zero.) Also, it was sleeping after the final
2088 failure, which is pointless.
2089
209024. Implemented tls_on_connect_ports.
2091
209225. Implemented acl_smtp_predata.
2093
209426. If the domain in control=submission is set empty, Exim assumes that the
2095 authenticated id is a complete email address when it generates From: or
2096 Sender: header lines.
2097
209827. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2099 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2100 chown and chgrp in /bin and hostname in /usr/bin.
2101
210228. Exim was keeping the "process log" file open after each use, just as it
2103 does for the main log. This opens the possibility of it remaining open for
2104 long periods when the USR1 signal hits a daemon. Occasional processlog
2105 errors were reported, that could have been caused by this. Anyway, it seems
2106 much more sensible not to leave this file open at all, so that is what now
2107 happens.
2108
210929. The long-running daemon process does not normally write to the log once it
2110 has entered its main loop, and it closes the log before doing so. This is
2111 so that log files can straightforwardly be renamed and moved. However,
2112 there are a couple of unusual error situations where the daemon does write
2113 log entries, and I had neglected to close the log afterwards.
2114
211530. The text of an SMTP error response that was received during a remote
2116 delivery was being truncated at 512 bytes. This is too short for some of
2117 the long messages that one sometimes sees. I've increased the limit to
2118 1024.
2119
212031. It is now possible to make retry rules that apply only when a message has a
2121 specific sender, in particular, an empty sender.
2122
212332. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2124 it possible to be selective about when SMTP synchronization is enforced.
2125
212633. Added "control = caseful_local_part" and "control = "caselower_local_part".
2127
212832. Implemented hosts_connection_nolog.
2129
213033. Added an ACL for QUIT.
2131
213234. Setting "delay_warning=" to disable warnings was not working; it gave a
2133 syntax error.
2134
213535. Added mailbox_size and mailbox_filecount to appendfile.
2136
213736. Added control = no_multiline_responses to ACLs.
2138
213937. There was a bug in the logic of the code that waits for the clock to tick
2140 in the case where the clock went backwards by a substantial amount such
2141 that the microsecond fraction of "now" was more than the microsecond
2142 fraction of "then" (but the whole seconds number was less).
2143
214438. Added support for the libradius Radius client library this is found on
2145 FreeBSD (previously only the radiusclient library was supported).
2146
2147
2148Exim version 4.42
2149-----------------
2150
2151 1. When certain lookups returned multiple values in the form name=value, the
2152 quoting of the values was not always being done properly. Specifically:
2153 (a) If the value started with a double quote, but contained no whitespace,
2154 it was not quoted.
2155 (b) If the value contained whitespace other than a space character (i.e.
2156 tabs or newlines or carriage returns) it was not quoted.
2157 This fix has been applied to the mysql and pgsql lookups by writing a
2158 separate quoting function and calling it from the lookup code. The fix
2159 should probably also be applied to nisplus, ibase and oracle lookups, but
2160 since I cannot test any of those, I have not disturbed their existing code.
2161
2162 2. A hit in the callout cache for a specific address caused a log line with no
2163 reason for rejecting RCPT. Now it says "Previous (cached) callout
2164 verification failure".
2165
2166 3. There was an off-by-one bug in the queryprogram router. An over-long
2167 return line was truncated at 256 instead of 255 characters, thereby
2168 overflowing its buffer with the terminating zero. As well as fixing this, I
2169 have increased the buffer size to 1024 (and made a note to document this).
2170
2171 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2172 when Exim is waiting for an SMTP response from a remote server, Exim
2173 restarts its select() call on the socket, thereby resetting its timeout.
2174 This is not a problem when such interrupts are rare. Somebody set up a cron
2175 job to run exiwhat every 2 minutes, which is less than the normal select()
2176 timeout (5 or 10 minutes). This meant that the select() timeout never
2177 kicked in because it was always reset. I have fixed this by comparing the
2178 time when an interrupt arrives with the time at the start of the first call
2179 to select(). If more time than the timeout has elapsed, the interrupt is
2180 treated as a timeout.
2181
2182 5. Some internal re-factoring in preparation for the addition of Sieve
2183 extensions (by MH). In particular, the "personal" test is moved to a
2184 separate function, and given an option for scanning Cc: and Bcc: (which is
2185 not set for Exim filters).
2186
2187 6. When Exim created an email address using the login of the caller as the
2188 local part (e.g. when creating a From: or Sender: header line), it was not
2189 quoting the local part when it contained special characters such as @.
2190
2191 7. Installed new OpenBSD configuration files.
2192
2193 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2194 try to make them clearer.
2195
2196 9. Callout options, other than the timeout value, were being ignored when
2197 verifying sender addresses in header lines. For example, when using
2198
2199 verify = header_sender/callout=no_cache
2200
2201 the cache was (incorrectly) being used.
2202
220310. Added a missing instance of ${EXE} to the exim_install script; this affects
2204 only the Cygwin environment.
2205
220611. When return_path_on_delivery was set as a log selector, if different remote
2207 addresses in the same message used different return paths and parallel
2208 remote delivery occurred, the wrong values would sometimes be logged.
2209 (Whenever a remote delivery process finished, the return path value from
2210 the most recently started remote delivery process was logged.)
2211
221212. RFC 3848 specifies standard names for the "with" phrase in Received: header
2213 lines when AUTH and/or TLS are in use. This is the "received protocol"
2214 field. Exim used to use "asmtp" for authenticated SMTP, without any
2215 indication (in the protocol name) for TLS use. Now it follows the RFC and
2216 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2217 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2218 names appear in log lines as well as in Received: header lines.
2219
222013. Installed MH's patches for Sieve to add the "copy" and "vacation"
2221 extensions, and comparison tests, and to fix some bugs.
2222
222314. Changes to the "personal" filter test:
2224
2225 (1) The test was buggy in that it was just doing the equivalent of
2226 "contains" tests on header lines. For example, if a user's address was
2227 anne@some.where, the "personal" test would incorrectly be true for
2228
2229 To: susanne@some.where
2230
2231 This test is now done by extracting each address from the header in turn,
2232 and checking the entire address. Other tests that are part of "personal"
2233 are now done using regular expressions (for example, to check local parts
2234 of addresses in From: header lines).
2235
2236 (2) The list of non-personal local parts in From: addresses has been
2237 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2238 taken from the Sieve specification recommendations.
2239
2240 (3) If the message contains any header line starting with "List-" it is
2241 treated as non-personal.
2242
2243 (4) The test for "circular" in the Subject: header line has been removed
2244 because it now seems ill-conceived.
2245
224615. Minor typos in src/EDITME comments corrected.
2247
224816. Installed latest exipick from John Jetmore.
2249
225017. If headers_add on a router specified a text string that was too long for
2251 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2252 of string_sprintf() is now avoided.
2253
225418. $message_body_size was not set (it was always zero) when running the DATA
2255 ACL and the local_scan() function.
2256
225719. For the "mail" command in an Exim filter, no default was being set for
2258 the once_repeat time, causing a random time value to be used if "once" was
2259 specified. (If the value happened to be <= 0, no repeat happened.) The
2260 default is now 0s, meaning "never repeat". The "vacation" command was OK
2261 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2262 (I found it when inspecting the code).
2263
226420. There is now an overall timeout for performing a callout verification. It
2265 defaults to 4 times the callout timeout, which applies to individual SMTP
2266 commands during the callout. The overall timeout applies when there is more
2267 than one host that can be tried. The timeout is checked before trying the
2268 next host. This prevents very long delays if there are a large number of
2269 hosts and all are timing out (e.g. when the network connections are timing
2270 out). The value of the overall timeout can be changed by specifying an
2271 additional sub-option for "callout", called "maxwait". For example:
2272
2273 verify = sender/callout=5s,maxwait=20s
2274
227521. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2276 to the end before writing, but this should make it even safer).
2277
227822. Exim was forgetting that it had advertised PIPELINING for the second and
2279 subsequent messages on an SMTP connection. It was also not resetting its
2280 memory on STARTTLS and an internal HELO.
2281
228223. When Exim logs an SMTP synchronization error within a session, it now
2283 records whether PIPELINING has been advertised or not.
2284
228524. Added 3 instances of "(long int)" casts to time_t variables that were being
2286 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2287 rather than long int.
2288
228925. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2290
229126. Added the never_mail option to autoreply.
2292
2293
2294Exim version 4.41
2295-----------------
2296
2297 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2298 crash if the getsockname() call failed; this can happen if a connection is
2299 closed very soon after it is established. The problem was simply in the
2300 order in which certain operations were done, causing Exim to try to write
2301 to the SMTP stream before it had set up the file descriptor. The bug has
2302 been fixed by making things happen in the correct order.
2303
2304
2305Exim version 4.40
2306-----------------
2307
2308 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2309 before the connection was closed, thus losing the rejection response.
2310
2311 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2312 some early Solaris releases, but causes trouble in current releases where
2313 socklen_t is defined.
2314
2315 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2316 always exist.
2317
2318 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2319 configured.
2320
2321 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2322 that releasing the top of it at the end releases what was used for sub-
2323 expansions (unless the block got too big). However, discard this block if
2324 the first thing is a variable or header, so that we can use its block when
2325 it is dynamic (useful for very large $message_headers, for example).
2326
2327 6. Lookups now cache *every* query, not just the most recent. A new, separate
2328 store pool is used for this. It can be recovered when all lookup caches are
2329 flushed. Lookups now release memory at the end of their result strings.
2330 This has involved some general refactoring of the lookup sources.
2331
2332 7. Some code has been added to the store_xxx() functions to reduce the amount
2333 of flapping under certain conditions.
2334
2335 8. log_incoming_interface used to affect only the <= reception log lines. Now
2336 it causes the local interface and port to be added to several more SMTP log
2337 lines, for example "SMTP connection from", and rejection lines.
2338
2339 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2340
234110. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2342
234311. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2344 could be overwritten at the end of the current message (or the start of a
2345 new message if it was set in a HELO ACL). The value is now preserved for
2346 the duration of the SMTP connection.
2347
234812. If a transport had a headers_rewrite setting, and a matching header line
2349 contained an unqualified address, that address was qualified, even if it
2350 did not match any rewriting rules. The underlying bug was that the values
2351 of the flags that permit the existence of unqualified sender and recipient
2352 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2353 non-local messages, and by -bnq for local messages) were not being
2354 preserved with the message after it was received.
2355
235613. When Exim was logging an SMTP synchronization error, it could sometimes log
2357 "next input=" as part of the text comprising the host identity instead of
2358 the correct text. The code was using the same buffer for two different
2359 strings. However, depending on which order the printing function evaluated
2360 its arguments, the bug did not always show up. Under Linux, for example, my
2361 test suite worked just fine.
2362
236314. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2364 doesn't work with some older versions of Perl. It has been changed to "my",
2365 which in any case is probably the better facility to use.
2366
236715. A really picky compiler found some instances of statements for creating
2368 error messages that either had too many or two few arguments for the format
2369 string.
2370
237116. The size of the buffer for calls to the DNS resolver has been increased
2372 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2373 for addresses that have a lot of PTR records. This alleviates a problem; it
2374 does not fully solve it.
2375
237617. A dnsdb lookup for PTR records that receives more data than will fit in the
2377 buffer now truncates the list and logs the incident, which is the same
2378 action as happens when Exim is looking up a host name and its aliases.
2379 Previously in this situation something unpredictable would happen;
2380 sometimes it was "internal error: store_reset failed".
2381
238218. If a server dropped the connection unexpectedly when an Exim client was
2383 using GnuTLS and trying to read a response, the client delivery process
2384 crashed while trying to generate an error log message.
2385
238619. If a "warn" verb in an ACL added multiple headers to a message in a single
2387 string, for example:
2388
2389 warn message = H1: something\nH2: something
2390
2391 the text was added as a single header line from Exim's point of view
2392 though it ended up OK in the delivered message. However, searching for the
2393 second and subsequent header lines using $h_h2: did not work. This has been
2394 fixed. Similarly, if a system filter added multiple headers in this way,
2395 the routers could not see them.
2396
239720. Expanded the error message when iplsearch is called with an invalid key to
2398 suggest using net-iplsearch in a host list.
2399
240021. When running tests using -bh, any delays imposed by "delay" modifiers in
2401 ACLs are no longer actually imposed (and a message to that effect is
2402 output).
2403
240422. If a "gecos" field in a passwd entry contained escaped characters, in
2405 particular, if it contained a \" sequence, Exim got it wrong when building
2406 a From: or a Sender: header from that name. A second bug also caused
2407 incorrect handling when an unquoted " was present following a character
2408 that needed quoting.
2409
241023. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2411 was not being matched caselessly.
2412
241324. Arranged for all hyphens in the exim.8 source to be escaped with
2414 backslashes.
2415
241625. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2417 properly. Recipient callout cache records were still being keyed to include
2418 the sender, even when use_sender was set false. This led to far more
2419 callouts that were necessary. The sender is no longer included in the key
2420 when use_sender is false.
2421
242226. Added "control = submission" modifier to ACLs.
2423
242427. Added the ${base62d: operator to decode base 62 numbers.
2425
242628. dnsdb lookups can now access SRV records.
2427
242829. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2429 the configuration file.
2430
243130. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2432 (-v) mode. This makes the output for a verbose queue run more intelligible.
2433
243431. Added a use_postmaster feature to recipient callouts.
2435
243632. Added the $body_zerocount variable, containing the number of binary zero
2437 bytes in the message body.
2438
243933. The time of last modification of the "new" subdirectory is now used as the
2440 "mailbox time last read" when there is a quota error for a maildir
2441 delivery.
2442
244334. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2444
244535. Added +ignore_unknown as a special item in host lists.
2446
244736. Code for decoding IPv6 addresses in host lists is now included, even if
2448 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2449 address was recognized as an IP address, but was then not correctly decoded
2450 into binary, causing unexpected and incorrect effects when compared with
2451 another IP address.
2452
2453
2454Exim version 4.34
2455-----------------
2456
2457 1. Very minor rewording of debugging text in manualroute to say "list of
2458 hosts" instead of "hostlist".
2459
2460 2. If verify=header_syntax was set, and a header line with an unqualified
2461 address (no domain) and a large number of spaces between the end of the
2462 name and the colon was received, the reception process suffered a buffer
2463 overflow, and (when I tested it) crashed. This was caused by some obsolete
2464 code that should have been removed. The fix is to remove it!
2465
2466 3. When running in the test harness, delay a bit after writing a bounce
2467 message to get a bit more predictability in the log output.
2468
2469 4. Added a call to search_tidyup() just before forking a reception process. In
2470 theory, someone could use a lookup in the expansion of smtp_accept_max_
2471 per_host which, without the tidyup, could leave open a database connection.
2472
2473 5. Added the variables $recipient_data and $sender_data which get set from a
2474 lookup success in an ACL "recipients" or "senders" condition, or a router
2475 "senders" option, similar to $domain_data and $local_part_data.
2476
2477 6. Moved the writing of debug_print from before to after the "senders" test
2478 for routers.
2479
2480 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2481 problems for message scanning, either using a data ACL, or using
2482 local_scan() because the Received: header was not generated till after they
2483 were called (in order to set the time as the time of reception completion).
2484 I have revised the way this works. The header is now generated after the
2485 body is received, but before the ACL or local_scan() are called. After they
2486 are run, the timestamp in the header is updated.
2487
2488
2489Exim version 4.33
2490-----------------
2491
2492 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2493 before starting a queue runner without re-exec. This happened only when
2494 deliver_drop_privilege was set or when the Exim user was set to root. The
2495 effect of the bug was that timeouts during subsequent deliveries caused
2496 crashes instead of being properly handled. The handler is now left at its
2497 default (and expected) setting.
2498
2499 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2500 message, again when deliver_drop_privilege is set or Exim is run as root.
2501 The bug described in (1) was not present in this case, but the tidying up
2502 of the other signals was missing. I have made the two cases consistent.
2503
2504 3. The ignore_target_hosts setting on a manualroute router was being ignored
2505 for hosts that were looked up using the /MX notation.
2506
2507 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2508 in domain lists.
2509
2510 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2511 operated on the sender address. After changing the $sender_address to <>
2512 for the sender address verify, Exim was re-instated it as the original
2513 (before rewriting) address, but remembering that it had rewritten it, so it
2514 wasn't rewriting it again. This bug also had the effect of breaking the
2515 sender address verification caching when the sender address was rewritten.
2516
2517 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2518 This has been changed so that if the ip literal address matches
2519 ignore_target_hosts, the router declines.
2520
2521 7. Added expansion conditions match_domain, match_address, and match_local_
2522 part (NOT match_host).
2523
2524 8. The placeholder for the Received: header didn't have a length field set.
2525
2526 9. Added code to Exim itself and to exim_lock to test for a specific race
2527 condition that could lead to file corruption when using MBX delivery. The
2528 issue is with the lockfile that is created in /tmp. If this file is removed
2529 after a process has opened it but before that process has acquired a lock,
2530 there is the potential for a second process to recreate the file and also
2531 acquire a lock. This could lead to two Exim processes writing to the file
2532 at the same time. The added code performs the same test as UW imapd; it
2533 checks after acquiring the lock that its file descriptor still refers to
2534 the same named file.
2535
253610. The buffer for building added header lines was of fixed size, 8192 bytes.
2537 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2538 when Exim is built.
2539
254011. Added the smtp_active_hostname option. If used, this will typically be made
2541 to depend on the incoming interface address. Because $interface_address is
2542 not set up until the daemon has forked a reception process, error responses
2543 that can happen earlier (such as "too many connections") no longer contain
2544 a host name.
2545
254612. If an expansion in a condition on a "warn" statement fails because a lookup
2547 defers, the "warn" statement is abandoned, and the next ACL statement is
2548 processed. Previously this caused the whole ACL to be aborted.
2549
255013. Added the iplsearch lookup type.
2551
255214. Added ident_timeout as a log selector.
2553
255415. Added tls_certificate_verified as a log selector.
2555
255616. Added a global option tls_require_ciphers (compare the smtp transport
2557 option of the same name). This controls incoming TLS connections.
2558
255917. I finally figured out how to make tls_require_ciphers do a similar thing
2560 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2561 before starting the TLS session.
2562
256318. Tabs are now shown as \t in -bP output.
2564
256519. If the log selector return_path_on_delivery was set, Exim crashed when
2566 bouncing a message because it had too many Received: header lines.
2567
256820. If two routers both had headers_remove settings, and the first one included
2569 a superfluous trailing colon, the final name in the first list and the
2570 first name in the second list were incorrectly joined into one item (with a
2571 colon in the middle).
2572
2573
2574Exim version 4.32
2575-----------------
2576
2577 1. Added -C and -D options to the exinext utility, mainly to make it easier
2578 to include in the automated testing, but these could be helpful when
2579 multiple configurations are in use.
2580
2581 2. The exinext utility was not formatting the output nicely when there was
2582 an alternate port involved in the retry record key, nor when there was a
2583 message id as well (for retries that were specific to a specific message
2584 and a specific host). It was also confused by IPv6 addresses, because of
2585 the additional colons they contain. I have fixed the IPv4 problem, and
2586 patched it up to do a reasonable job for IPv6.
2587
2588 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2589 delivery, the log line now contains "pipelined" if PIPELINING was used.
2590
2591 4. An SMTP transport process used to panic and die if the bind() call to set
2592 an explicit outgoing interface failed. This has been changed; it is now
2593 treated in the same way as a connect() failure.
2594
2595 5. A reference to $sender_host_name in the part of a conditional expansion
2596 that was being skipped was still causing a DNS lookup. This no longer
2597 occurs.
2598
2599 6. The def: expansion condition was not recognizing references to header lines
2600 that used bh_ and bheader_.
2601
2602 7. Added the _cache feature to named lists.
2603
2604 8. The code for checking quota_filecount in the appendfile transport was
2605 allowing one more file than it should have been.
2606
2607 9. For compatibility with Sendmail, the command line option
2608
2609 -prval:sval
2610
2611 is equivalent to
2612
2613 -oMr rval -oMs sval
2614
2615 and sets the incoming protocol and host name (for trusted callers). The
2616 host name and its colon can be omitted when only the protocol is to be set.
2617 Note the Exim already has two private options, -pd and -ps, that refer to
2618 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2619 "s", but I don't think that's a major issue.
2620
262110. A number of refactoring changes to the code, none of which should affect
2622 Exim's behaviour:
2623
2624 (a) The number of logging options was getting close to filling up the
2625 32-bit word that was used as a bit map. I have split them into two classes:
2626 those that are passed in the argument to log_write(), and those that are
2627 only ever tested independently outside of that function. These are now in
2628 separate 32-bit words, so there is plenty of room for expansion again.
2629 There is no change in the user interface or the logging behaviour.
2630
2631 (b) When building, for example, log lines, the code previously used a
2632 macro that called string_cat() twice, in order to add two strings. This is
2633 not really sufficiently general. Furthermore, there was one instance where
2634 it was actually wrong because one of the argument was used twice, and in
2635 one call a function was used. (As it happened, calling the function twice
2636 did not affect the overall behaviour.) The macro has been replaced by a
2637 function that can join an arbitrary number of extra strings onto a growing
2638 string.
2639
2640 (c) The code for expansion conditions now uses a table and a binary chop
2641 instead of a serial search (which was left over from when there were very
2642 few conditions). Also, it now recognizes conditions like "pam" even when
2643 the relevant support is not compiled in: a suitably worded error message is
2644 given if an attempt is made to use such a condition.
2645
264611. Added ${time_interval:xxxxx}.
2647
264812. A bug was causing one of the ddress fields not to be passed back correctly
2649 from remote delivery subprocesses. The field in question was not being
2650 subsequently used, so this caused to problems in practice.
2651
265213. Added new log selectors queue_time and deliver_time.
2653
265414. Might have fixed a bug in maildirsizefile handling that threw up
2655 "unexpected character" debug warnings, and recalculated the data
2656 unnecessarily. In any case, I expanded the warning message to give more
2657 information.
2658
265915. Added the message "Restricted characters in address" to the statements in
2660 the default ACL that block characters like @ and % in local parts.
2661
266216. Change 71 for release 4.31 proved to be much less benign that I imagined.
2663 Three changes have been made:
2664
2665 (a) There was a serious bug; a negative response to MAIL caused the whole
2666 recipient domain to be cached as invalid, thereby blocking all messages
2667 to all local parts at the same domain, from all senders. This bug has
2668 been fixed. The domain is no longer cached after a negative response to
2669 MAIL if the sender used is not empty.
2670
2671 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2672 been restored.
2673
2674 (c) A new callout option, "use_sender" has been added for people who want
2675 the modified behaviour.
2676
2677
2678Exim version 4.31
2679-----------------
2680
2681 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2682 Larry Rosenman.
2683
2684 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2685 indeed breaks things for older releases.
2686
2687 3. Added additional logging to the case where there is a problem reading data
2688 from a filter that is running in a subprocess using a pipe, in order to
2689 try to track down a specific problem.
2690
2691 4. Testing facility fudge: when running in the test harness and attempting
2692 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2693 getting "No route to host". Convert this to a timeout.
2694
2695 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2696 warning.
2697
2698 6. Some OS don't have socklen_t but use size_t instead. This affects the
2699 fifth argument of getsockopt() amongst other things. This is now
2700 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2701 can be set for individual OS. I have set it for SunOS5, OSF1, and
2702 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2703 some earlier ones do not.
2704
2705 7. Change 4.30/15 was not doing the test caselessly.
2706
2707 8. The standard form for an IPv6 address literal was being rejected by address
2708 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2709 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2710 this, as well as the form without the "IPv6" on the front (but only when
2711 address literals are enabled, of course).
2712
2713 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2714
271510. Exim crashed if a message with an empty sender address specified by -f
2716 encountered a router with an errors_to setting. This could be provoked only
2717 by a command such as
2718
2719 exim -f "" ...
2720
2721 where an empty string was supplied; "<>" did not hit this bug.
2722
272311. Installed PCRE release 4.5.
2724
272512. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2726 remained set. It is now erased.
2727
272813. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2729 times from message ids (which are base 36 rather than the normal 62).
2730
273114. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2732 were being counted as actual protocol errors, and logged if the log
2733 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2734 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2735 and DATA following a set of rejected RCPTs do not count as protocol errors.
2736 In other words, Exim assumes they were pipelined, though this may not
2737 actually be the case. Of course, in all cases the client gets an
2738 appropriate error code.
2739
274015. If a lookup fails in an ACL condition, a message about the failure may
2741 be available; it is used if testing the ACL cannot continue, because most
2742 such messages specify what the cause of the deferral is. However, some
2743 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2744 that caused an old message to be retained and used if a later statement
2745 caused a defer, replacing the real cause of the deferral.
2746
274716. If an IP address had so many PTR records that the DNS lookup buffer
2748 was not large enough to hold them, Exim could crash while trying to process
2749 the truncated data. It now detects and logs this case.
2750
275117. Further to 4.21/58, another change has been made: if (and only if) the
2752 first line of a message (the first header line) ends with CRLF, a bare LF
2753 in a subsequent header line has a space inserted after it, so as not to
2754 terminate the header.
2755
275618. Refactoring: tidied an ugly bit of code in appendfile that copied data
2757 unnecessarily, used atoi() instead of strtol(), and didn't check the
2758 termination when getting file sizes from file names by regex.
2759
276019. Completely re-implemented the support for maildirsize files, in the light
2761 of a number of problems with the previous contributed implementation
2762 (4.30/29). In particular:
2763
2764 . If the quota is zero, the maildirsize file is maintained, but no quota is
2765 imposed.
2766
2767 . If the maildir directory does not exist, it is created before any attempt
2768 to write a maildirsize file.
2769
2770 . The quota value in the file is just a cache; if the quota is changed in
2771 the transport, the new value overrides.
2772
2773 . A regular expression is available for excluding directories from the
2774 count.
2775
277620. The autoreply transport checks the characters in options that define the
2777 message's headers; it allows continued headers, but it was checking with
2778 isspace() after an embedded newline instead of explicitly looking for a
2779 space or a tab.
2780
278121. If all the "regular" hosts to which an address was routed had passed their
2782 expiry times, and had not reached their retry times, the address was
2783 bounced, even if fallback hosts were defined. Now Exim should go on to try
2784 the fallback hosts.
2785
278622. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2787 equivalent code in the SMTP transport. Some hosts send humungous responses
2788 to HELO/EHLO, more than 1024 it seems.
2789
279023. Refactoring: code in filter.c used (void *) for "any old type" but this
2791 gives compiler warnings in some environments. I've now done it "properly",
2792 using a union.
2793
279424. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2795 (because of problems with the built-in one) was declared to return uschar *
2796 instead of char *, causing compiler failure.
2797
279825. Fixed a file descriptor leak when processing alias/forward files.
2799
280026. Fixed a minor format string issue in dbfn.c.
2801
280227. Typo in exim.c: ("dmbnz" for "dbmnz").
2803
280428. If a filter file refered to $h_xxx or $message_headers, and the headers
2805 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2806 become corrupted.
2807
280829. When a sender address is verified, it is cached, to save repeating the test
2809 when there is more than one recipient in a message. However, when the
2810 verification involves a callout, it is possible for different callout
2811 options to be set for different recipients. It is too complicated to keep
2812 track of this in the cache, so now Exim always runs a verification when a
2813 callout is required, relying on the callout cache for the optimization.
2814 The overhead is duplication of the address routing, but this should not be
2815 too great.
2816
281730. Fixed a bug in callout caching. If a RCPT command caused the sender address
2818 to be verified with callout=postmaster, and the main callout worked but the
2819 postmaster check failed, the verification correctly failed. However, if a
2820 subsequent RCPT command asked for sender verification *without* the
2821 postmaster check, incorrect caching caused this verification also to fail,
2822 incorrectly.
2823
282431. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2825 it was not caching the DNS options (qualify_single, search_parents) that
2826 were used when the lookup failed. A subsequent lookup with different
2827 options therefore always gave the same answer, though there were cases
2828 where it should not have. (Example: a "domains = !$mx_any" option on a
2829 dnslookup router: the "domains" option is always processed without any
2830 widening, but the router might have qualify_single set.) Now Exim uses the
2831 cached value only when the same options are set.
2832
283332. Added John Jetmore's "exipick" utility to the distribution.
2834
283533. GnuTLS: When an attempt to start a TLS session fails for any reason other
2836 than a timeout (e.g. a certificate is required, and is not provided), an
2837 Exim server now closes the connection immediately. Previously it waited for
2838 the client to close - but if the client is SSL, it seems that they each
2839 wait for each other, leading to a delay before one of them times out.
2840
284134: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2842 maintained 0.8.x compatibility because I don't think many are using it, and
2843 it is clearly obsolete.
2844
284535. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2846 transport.
2847
284836. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2849 client certificate was expired. A simple patch fixes this, though I don't
2850 understand the full logic of why the verify callback is called multiple
2851 times.
2852
285337. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2854 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2855 which causes problems with some clients (such as the Certicom SSL Plus
2856 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2857 disables the coutermeasure allowing Eudora to connect."
2858
285938. Exim was not checking that a write() to a log file succeeded. This could
2860 lead to Bad Things if a log got too big, in particular if it hit a file
2861 size limit. Exim now panics and dies if it cannot write to a log file, just
2862 as it does if it cannot open a log file.
2863
286439. Modified OS/Makefile-Linux so that it now contains
2865
2866 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2867
2868 The two -D definitions ensure that Exim is compiled with large file
2869 support, which makes it possible to handle log files that are bigger than
2870 2^31.
2871
287240. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2873 instance) a domain was checked against a named list that involved a lookup,
2874 causing $domain_data to be set, then another domain was checked against the
2875 same list, then the first domain was re-checked, the value of $domain_data
2876 after the final check could be wrong. In particular, if the second check
2877 failed, it could be set empty. This bug probably also applied to
2878 $localpart_data.
2879
288041. The strip_trailing_dot option was not being applied to the address given
2881 with the -f command-line option.
2882
288342. The code for reading a message's header from the spool was incrementing
2884 $received_count, but never initializing it. This meant that the value was
2885 incorrect (doubled) while delivering a message in the same process in which
2886 it was received. In the most common configuration of Exim, this never
2887 happens - a fresh exec is done - but it can happen when
2888 deliver_drop_privilege is set.
2889
289043. When Exim logs an SMTP synchronization error - client data sent too soon -
2891 it now includes up to 150 characters of the unexpected data in the log
2892 line.
2893
289444. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2895 and building data strings. The size of both of these buffers was 10 000
2896 bytes - far larger than anybody would *ever* want, thought I. Needless to
2897 say, somebody hit the limit. I have increased the maximum line length to
2898 20 000 and the maximum data length of concatenated lines to 100 000. I have
2899 also fixed two bugs, because there was no checking on these buffers. Tsk,
2900 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2901 buffer is too small.
2902
290345. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2904 lsearch lookups. Now it does.
2905
290646. When parsing a route_list item in a manualroute router, a fixed-length
2907 buffer was used for the list of hosts. I made this 1024 bytes long,
2908 thinking that nobody would ever have a list of hosts that long. Wrong.
2909 Somebody had a whole pile of complicated expansion conditions, and the
2910 string was silently truncated, leading to an expansion error. It turns out
2911 that it is easier to change to an unlimited length (owing to other changes
2912 that have happened since this code was originally written) than to build
2913 structure for giving a limitation error. The length of the item that
2914 expands into the list of hosts is now unlimited.
2915
291647. The lsearch lookup could not handle data where the length of text line was
2917 more than 4095 characters. Such lines were truncated, leading to shortened
2918 data being returned. It should now handle lines of any length.
2919
292048. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2921 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2922 ACL").
2923
292449. Cosmetic tidy to scripts like exicyclog that are generated by globally
2925 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2926 no longer happens in comment lines. A list of replacements is now placed
2927 at the head of all of the source files, except those whose only change is
2928 to replace PERL_COMMAND in the very first #! line.
2929
293050. Replaced the slow insertion sort in queue.c, for sorting the list of
2931 messages on the queue, with a bottom-up merge sort, using code contributed
2932 by Michael Haardt. This should make operations like -bp somewhat faster on
2933 large queues. It won't affect queue runners, except when queue_run_in_order
2934 is set.
2935
293651. Installed eximstats 1.31 in the distribution.
2937
293852. Added support for SRV lookups to the dnslookup router.
2939
294053. If an ACL referred to $message_body or $message_body_end, the value was not
2941 reset for any messages that followed in the same SMTP session.
2942
294354. The store-handling optimization for building very long strings was not
2944 differentiating between the different store pools. I don't think this
2945 actually made any difference in practice, but I've tidied it.
2946
294755. While running the routers to verify a sender address, $sender_address
2948 was still set to the sender address. This is wrong, because when routing to
2949 send a bounce to the sender, it would be empty. Therefore, I have changed
2950 it so that, while verifying a sender address, $sender_address is set to <>.
2951 (There is no change to what happens when verifying a recipient address.)
2952
295356. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2954 target A or AAAA records (if not already returned) without resetting the
2955 qualify_single or search_parents options of the DNS resolver. These are
2956 inappropriate in this case because the targets of MX and SRV records must
2957 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2958 target that, when qualified, matched something in the local domain. These
2959 two options are now turned off when doing these lookups.
2960
296157. It seems that at least some releases of Reiserfs (which does not have the
2962 concept of a fixed number of inodes) returns zero and not -1 for the
2963 number of available inodes. This interacted badly with check_spool_inodes,
2964 which assumed that -1 was the "no such thing" setting. What I have done is
2965 to check that the total number of inodes is greater than zero before doing
2966 the test of how many are available.
2967
296858. When a "warn" ACL statement has a log_message modifier, the message is
2969 remembered, and not repeated. This is to avoid a lot of repetition when a
2970 message has many recipients that cause the same warning to be written.
2971 Howewer, Exim was preserving the list of already written lines for an
2972 entire SMTP session, which doesn't seem right. The memory is now reset if a
2973 new message is started.
2974
297559. The "rewrite" debugging flag was not showing the result of rewriting in the
2976 debugging output unless log_rewrite was also set.
2977
297860. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2979 of (int)(handle) when we know that handle contains (void *)(-1).
2980
298161. The Exim daemon panic-logs an error return when it closes the incoming
2982 connection. However "connection reset by peer" seems to be common, and
2983 isn't really an error worthy of noting specially, so that particular error
2984 is no long logged.
2985
298662. When Exim is trying to find all the local interfaces, it used to panic and
2987 die if the ioctl to get the interface flags failed. However, it seems that
2988 on at least one OS (Solaris 9) it is possible to have an interface that is
2989 included in the list of interfaces, but for which you get a failure error
2990 for this call. This happens when the interface is not "plumbed" into a
2991 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2992 failure of the "get flags" call assumes that the interface is down.
2993
299463. Added a ${eval10: operator, which assumes all numbers are decimal. This
2995 makes life easier for people who are doing arithmetic on fields extracted
2996 from dates, where you often get leading zeros that should not be
2997 interpreted as octal.
2998
299964. Added qualify_domain to the redirect router, to override the global
3000 setting.
3001
300265. If a pathologically long header line contained very many addresses (the
3003 report of this problem mentioned 10 000) and each of them was rewritten,
3004 Exim could use up a very large amount of memory. (It kept on making new
3005 copies of the header line as it rewrote, and never released the old ones.)
3006 At the expense of a bit more processing, the header rewriting function has
3007 been changed so that it no longer eats memory in this way.
3008
300966. The generation of the Received: header has been moved from the time that a
3010 message starts to be received, to the time that it finishes. The timestamp
3011 in the Received: header should now be very close to that of the <= log
3012 line. There are two side-effects of this change:
3013
3014 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3015 logged header lines no longer include the local Received: line, because
3016 it has not yet been created. The same applies to a copy of the message
3017 that is returned to a non-SMTP sender when a message is rejected.
3018
3019 (b) When a filter file is tested using -bf, no additional Received: header
3020 is added to the test message. After some thought, I decided that this
3021 is a bug fix.
3022
3023 This change does not affect the value of $received_for. It is still set
3024 after address rewriting, but before local_scan() is called.
3025
302667. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3027
302868. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3029 gave an unhelpful panic error message, and a defer error. I have managed to
3030 change this behaviour so that it now rejects any supplied certificate,
3031 which seems right, as the list of acceptable certificates is empty.
3032
303369. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3034 gave an unhelpful defer error. I have not managed to make this reject any
3035 supplied certificates, but the error message it gives is "no certificate
3036 supplied", which is not helpful.
3037
303870. exigrep's output now also includes lines that are not associated with any
3039 message, but which match the given pattern. Implemented by a patch from
3040 Martin Sluka, which also tidied up the Perl a bit.
3041
304271. Recipient callout verification, like sender verification, was using <> in
3043 the MAIL FROM command. This isn't really the right thing, since the actual
3044 sender may affect whether the remote host accepts the recipient or not. I
3045 have changed it to use the actual sender in the callout; this means that
3046 the cache record is now keyed on a recipient/sender pair, not just the
3047 recipient address. There doesn't seem to be a real danger of callout loops,
3048 since a callout by the remote host to check the sender would use <>.
3049 [SEE ABOVE: changed after hitting problems.]
3050
305172. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3052 temporary errors. However, in the case of such a code being given after
3053 the end of a data transmission (i.e. after ".") Exim was failing to write
3054 a retry record for the message. (Yes, there was some broken host that was
3055 actually sending 8xx at this point.)
3056
305773. An unknown lookup type in a host list could cause Exim to panic-die when
3058 the list was checked. (An example that provoked this was putting <; in the
3059 middle of a list instead of at the start.) If this happened during a DATA
3060 ACL check, a -D file could be left lying around. This kind of configuration
3061 error no longer causes Exim to die; instead it causes a defer errror. The
3062 incident is still logged to the main and panic logs.
3063
306474. Buglet left over from Exim 3 conversion. The message "too many messages
3065 in one connection" was written to the rejectlog but not the mainlog, except
3066 when address rewriting (yes!) was being logged.
3067
306875. Added write_rejectlog option.
3069
307076. When a system filter was run not as root (that is, when system_filter_user
3071 was set), the values of the $n variables were not being returned to the
3072 main process; thus, they were not subsequently available in the $sn
3073 variables.
3074
307577. Added +return_path_on_delivery log selector.
3076
307778. A connection timeout was being treated differently from recipients deferred
3078 when testing hosts_max_try with a message that was older than the host's
3079 retry timeout. (The host should not be counted, thus allowing all hosts to
3080 be tried at least once before bouncing.) This may have been the cause of an
3081 occasionally reported bug whereby a message would remain on the queue
3082 longer than the retry timeout, but would be bounced if a delivery was
3083 forced. I say "may" because I never totally pinned down the problem;
3084 setting up timeout/retry tests is difficult. See also the next item.
3085
308679. The ultimate address timeout was not being applied to errors that involved
3087 a combination of host plus message (for example, a timeout on a MAIL
3088 command). When an address resolved to a number of possible hosts, and they
3089 were not all tried for each delivery (e.g. because of hosts_max_try), a
3090 message could remain on the queue longer than the retry timeout.
3091
309280. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3093 Haardt.
3094
309581. Fixed an obscure SMTP outgoing bug which required at least the following
3096 conditions: (a) there was another message waiting for the same server;
3097 (b) the server returned 5xx to all RCPT commands in the first message so
3098 that the message was not completed; (c) the server dropped the connection
3099 or gave a negative response to the RSET that Exim sends to abort the
3100 transaction. The observed case was a dropped connection after DATA that had
3101 been sent in pipelining mode. That is, the server had advertised PIPELINING
3102 but was not implementing it correctly. The effect of the bug was incorrect
3103 behaviour, such as trying another host, and this could lead to a crash.
3104
3105
3106Exim version 4.30
3107-----------------
3108
3109 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3110 and daemon.c were passed as pointers to ints; they should have been
3111 pointers to socklen_t variables (which are typically unsigned ints).
3112
3113 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3114 fixed.
3115
3116 3. Fixed a really odd bug that affected only the testing scheme; patching a
3117 certain fixed string in the binary changed the value of another string that
3118 happened to be identical to the end of the original first string.
3119
3120 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3121 name", it returns that address as the IP address. On some operating
3122 systems (e.g. Solaris), it also passes back the IP address string as the
3123 "host name". However, on others (e.g. Linux), it passes back an empty
3124 string. Exim wasn't checking for this, and was changing the host name to an
3125 empty string, assuming it had been canonicized.
3126
3127 5. Although rare, it is permitted to have more than one PTR record for a given
3128 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3129 all the names associated with an address, because they do in Solaris.
3130 However, it seems that they do not in Linux for data that comes from the
3131 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3132 I found this out when I moved to a new Linux workstation and tried to run
3133 the Exim test suite.
3134
3135 To get round this problem I have changed the code so that it now does its
3136 own call to the DNS to look up PTR records when searching for a host name.
3137 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3138 addresses that are only in /etc/hosts are still found.
3139
3140 This behaviour is, however, controlled by an option called host_lookup_
3141 order, which defaults to "bydns:byaddr". If people want to use the other
3142 order, or indeed, just use one or the other means of lookup, they can
3143 specify it in this variable.
3144
3145 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3146 some operating systems, this comes back from gethostbyaddr() as an empty
3147 string, and this is what Exim used to test for. However, it seems that in
3148 other systems, "." is yielded. Exim now tests for this case too.
3149
3150 7. The values of check_spool_space and check_log_space are now held internally
3151 as a number of kilobytes instead of an absolute number of bytes. If a
3152 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3153 kilobyte. This means that much larger values can be stored.
3154
3155 8. Exim monitor: an attempt to get the action menu when not actually pointing
3156 at a message produces an empty menu entitled "No message selected". This
3157 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3158 no entries in it ("Shell widget menu has zero width and/or height"). So I
3159 have added a single, blank menu entry in this case.
3160
3161 9. Added ${quote_local_part.
3162
316310. MIME decoding is now applied to the contents of Subject: header lines when
3164 they are logged.
3165
316611. Now that a reference to $sender_host_address automatically causes a reverse
3167 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3168 host lookup before query-style lookups in lists that might use this
3169 variable. This has therefore been abolished, and the "net-" prefix is no
3170 longer necessary for query-style lookups.
3171
317212. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3173 have been a typo for LFLAGS, so it has been changed.
3174
317513. The install script calls Exim with "-C /dev/null" in order to find the
3176 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3177 to be output. Howeve, since Exim outputs its version number before the
3178 error, it didn't break the script. It just looked ugly. I fixed this by
3179 always allowing "-C /dev/null" if the caller is root.
3180
318114. Ignore overlarge ACL variable number when reading spool file - insurance
3182 against a later release with more variables having written the file.
3183
318415. The standard form for an IPv6 address literal was being rejected by EHLO.
3185 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3186 this, as well as the form without the "IPv6" on the front.
3187
318816. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3189 OS/Makefile-Darwin file.
3190
319117. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3192 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3193
319418. After change 4.21/52, "%ld" was used to format the contents of the $inode
3195 variable. However, some OS use ints for inodes. I've added cast to long int
3196 to get rid of the compiler warning.
3197
319819. I had forgotten to lock out "/../" in configuration file names when
3199 ALT_CONFIG_PREFIX was set.
3200
320120. Routers used for verification do not need to specify transports. However,
3202 if such a router generated a host list, and callout was configured, Exim
3203 crashed, because it could not find a port number from the (non-existent)
3204 transport. It now assumes port 25 in this circumstance.
3205
320621. Added the -t option to exigrep.
3207
320822. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3209 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3210 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3211 them is set, LOOKUP_LSEARCH is forced.
3212
321323. "exim -bV" now outputs a list of lookups that are included in the binary.
3214
321524. Added sender and host information to the "rejected by local_scan()" log
3216 line; previously there was no indication of these.
3217
321825. Added .include_if_exists.
3219
322026. Change 3.952/11 added an explicit directory sync on top of a file sync for
3221 Linux. It turns out that not all file systems support this. Apparently some
3222 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3223 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3224 not supported on the file descriptor, is now ignored when Exim is trying to
3225 sync a directory. This applies only to Linux.
3226
322727. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3228
322928. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3230 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3231 this.
3232
323329. Added support for maildirsize files from supplied patch (modified a bit).
3234
323530. The use of :fail: followed by an empty string could lead Exim to respond to
3236 sender verification failures with (e.g.):
3237
3238 550 Verification failed for <xxx>
3239 550 Sender verify failed
3240
3241 where the first response line was missing the '-' that indicates it is not
3242 the final line of the response.
3243
324431. The loop for finding the name of the user that called Exim had a hardwired
3245 limit of 10; it now uses the value of finduser_retries, which is used for
3246 all other user lookups.
3247
324832. Added $received_count variable, available in data and not_smtp ACLs, and at
3249 delivery time.
3250
325133. Exim was neglecting to zero errno before one call of strtol() when
3252 expanding a string and expecting an integer value. On some systems this
3253 resulted in spurious "integer overflow" errors. Also, it was casting the
3254 result into an int without checking.
3255
325634. Testing for a connection timeout using "timeout_connect" in the retry rules
3257 did not work. The code looks as if it has *never* worked, though it appears
3258 to have been documented since at least releast 1.62. I have made it work.
3259
326035. The "timeout_DNS" error in retry rules, also documented since at least
3261 1.62, also never worked. As it isn't clear exactly what this means, and
3262 clearly it isn't a major issue, I have abolished the feature by treating it
3263 as "timeout", and writing a warning to the main and panic logs.
3264
326536. The display of retry rules for -brt wasn't always showing the error code
3266 correctly.
3267
326837. Added new error conditions to retry rules: timeout_A, timeout_MX,
3269 timeout_connect_A, timeout_connect_MX.
3270
327138. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3272 to the empty sender.
3273
327439. The daemon was not analysing the content of -oX till after it had closed
3275 stderr and disconnected from the controlling terminal. This meant that any
3276 syntax errors were only noted on the panic log, and the return code from
3277 the command was 0. By re-arranging the code a little, I've made the
3278 decoding happen first, so such errors now appear on stderr, and the return
3279 code is 1. However, the actual setting up of the sockets still happens in
3280 the disconnected process, so errors there are still only recorded on the
3281 panic log.
3282
328340. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3284 connections (as happens on some IP stacks) was logged at start up time as
3285 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3286 it from "IPv6 and IPv4", which means that two separate sockets are being
3287 used.
3288
328941. The debug output for gethostbyname2() or getipnodebyname() failures now
3290 says whether AF_INET or AF_INET6 was passed as an argument.
3291
329242. Exiwhat output was messed up when time zones were included in log
3293 timestamps.
3294
329543. Exiwhat now gives more information about the daemon's listening ports,
3296 and whether -tls-on-connect was used.
3297
329844. The "port" option of the smtp transport is now expanded.
3299
330045. A "message" modifier in a "warn" statement in a non-message ACL was being
3301 silently ignored. Now an error message is written to the main and panic
3302 logs.
3303
330446. There's a new ACL modifier called "logwrite" which writes to a log file
3305 as soon as it is encountered.
3306
330747. Added $local_user_uid and $local_user_gid at routing time.
3308
330948. Exim crashed when trying to verify a sender address that was being
3310 rewritten to "<>".
3311
331249. Exim was recognizing only a space character after ".include". It now also
3313 recognizes a tab character.
3314
331550. Fixed several bugs in the Perl script that creates the exim.8 man page by
3316 extracting the relevant information from the specification. The man page no
3317 longer contains scrambled data for the -d option, and I've added a section
3318 at the front about calling Exim under different names.
3319
332051. Added "extra_headers" argument to the "mail" command in filter files.
3321
332252. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3323 crash.
3324
332553. Installed eximstats 1.29.
3326
332754. Added transport_filter_timeout as a generic transport option.
3328
332955. Exim no longer adds an empty Bcc: header to messages that have no To: or
3330 Cc: header lines. This was required by RFC 822, but it not required by RFC
3331 2822.
3332
333356. Exim used to add From:, Date:, and Message-Id: header lines to any
3334 incoming messages that did not have them. Now it does so only if the
3335 message originates locally, that is, if there is no associated remote host
3336 address. When Resent- header lines are present, this applies to the Resent-
3337 lines rather than the non-Resent- lines.
3338
333957. Drop incoming SMTP connection after too many syntax or protocol errors. The
3340 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3341
334258. Messages for configuration errors now include the name of the main
3343 configuration file - useful now that there may be more than one file in a
3344 list (.included file names were always shown).
3345
334659. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3347 for those rare installations that do not start the daemon as root or run it
3348 setuid root. I've cut out the call to initgroups() if the daemon is not
3349 root at that time.
3350
335160. The Exim user and group can now be bound into the binary as text strings
3352 that are looked up at the start of Exim's processing.
3353
335461. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3355
335662. Added $mailstore_basename variable.
3357
335863. Installed patch to sieve.c from Michael Haardt.
3359
336064. When Exim failed to open the panic log after failing to open the main log,
3361 the original message it was trying to log was written to stderr and debug
3362 output, but if they were not available (the usual case in production), it
3363 was lost. Now it is written to syslog before the two lines that record the
3364 failures to open the logs.
3365
336665. Users' Exim filters run in subprocesses under the user's uid. It is
3367 possible for a "deliver" command or an alias in a "personal" command to
3368 provoke an address rewrite. If logging of address rewriting is configured,
3369 this fails because the process is not running as root or exim. There may be
3370 a better way of dealing with this, but for the moment (because 4.30 needs
3371 to be released), I have disabled address rewrite logging when running a
3372 filter in a non-root, non-exim process.
3373
3374
3375Exim version 4.24
3376-----------------
3377
3378 1. The buildconfig auxiliary program wasn't quoting the value set for
3379 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3380 not defined. This bug was masked in 4.22 by the effect that was fixed in
3381 change 4.23/1.
3382
3383 2. Some messages that were rejected after a message id was allocated were
3384 shown as "incomplete" by exigrep. It no longer does this for messages that
3385 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3386
3387 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3388 have allow_domain_literals set, the ID did not get logged in the <= line.
3389 Domain literals are now always recognized in Message-ID: header lines.
3390
3391 4. The first argument for a ${extract expansion item is the key name or field
3392 number. Leading and trailing spaces in this item were not being ignored,
3393 causing some misleading effects.
3394
3395 5. When deliver_drop_privilege was set, single queue runner processes started
3396 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3397 same command in the process it spins off) were not dropping privilege.
3398
3399 6. When the daemon running as "exim" started a queue runner, it always
3400 re-executed Exim in the spun-off process. This is a waste of effort when
3401 deliver_drop_privilege is set. The new process now just calls the
3402 queue-runner function directly.
3403
3404
3405Exim version 4.23
3406-----------------
3407
3408 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3409 HEADERS_CHARSET.
3410
3411 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3412 ignored. Though the use of -oP was forcing the writing of a pid file, it
3413 was always written to the default place.
3414
3415 3. If the message "no IP address found for host xxxx" is generated during
3416 incoming verification, it is now followed by identification of the incoming
3417 connection (so you can more easily find what provoked it).
3418
3419 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3420
3421 5. Added some features to "harden" Exim a bit more against certain attacks:
3422
3423 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3424 be put in Local/Makefile. This is like the never_users runtime option,
3425 but it cannot be overridden. The default setting is "root".
3426
3427 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3428 prefix string with which any file named in a -C command line option
3429 must start.
3430
3431 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3432 is retained for -C and -D only if the caller of Exim is root. Without
3433 it, the exim user may also use -C and -D and retain privilege.
3434
3435 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3436 command line option is disabled.
3437
3438 6. Macro names set by the -D option must start with an upper case letter, just
3439 like macro names defined in the configuration file.
3440
3441 7. Added "dereference=" facility to LDAP.
3442
3443 8. Two instances of the typo "uknown" in the source files are fixed.
3444
3445 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3446 the Configure-Makefile script screwed up while processing it.
3447
344810. Incorporated PCRE 4.4.
3449
345011. The SMTP synchronization check was not operating right at the start of an
3451 SMTP session. For example, it could not catch a HELO sent before the client
3452 waited for the greeting. There is now a check for outstanding input at the
3453 point when the greeting is written. Because of the duplex, asynchronous
3454 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3455 way, but not yet received, when the check is performed.
3456
345712. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3458 on TCP/IP sockets, because this apparently causes some broken clients to
3459 timeout.
3460
346113. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3462 unchanged) from the Cygwin maintainer.
3463
346414. The code for -bV that shows what is in the binary showed "mbx" when maildir
3465 was supported instead of testing for mbx. Effectively a typo.
3466
346715. The spa authenticator server code was not checking that the input it
3468 received was valid base64.
3469
347016. The debug output line for the "set" modifier in ACLs was not showing the
3471 name of the variable that was being set.
3472
347317. Code tidy: the variable type "vtype_string" was never used. Removed it.
3474
347518. Previously, a reference to $sender_host_name did not cause a DNS reverse
3476 lookup on its own. Something else was needed to trigger the lookup. For
3477 example, a match in host_lookup or the need for a host name in a host list.
3478 Now, if $sender_host_name is referenced and the host name has not yet been
3479 looked up, a lookup is performed. If the lookup fails, the variable remains
3480 empty, and $host_lookup_failed is set to "1".
3481
348219. Added "eqi" as a case-independent comparison operator.
3483
348420. The saslauthd authentication condition could segfault if neither service
3485 nor realm was specified.
3486
348721. If an overflowing value such as "2048M" was set for message_size_limit, the
3488 error message that was logged was misleading, and incoming SMTP
3489 connections were dropped. The message is now more accurate, and temporary
3490 errors are given to SMTP connections.
3491
349222. In some error situations (such as 21 above) Exim rejects all SMTP commands
3493 (except RSET) with a 421 error, until QUIT is received. However, it was
3494 failing to send a response to QUIT.
3495
349623. The HELO ACL was being run before the code for helo_try_verify_hosts,
3497 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3498 ACL is now run after the helo_try_verify_hosts code.
3499
350024. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3501 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3502 case-independent, so other case variants are also recognized). Apparently
3503 some systems use these upper case variants.
3504
350525. If more than two messages were waiting for the same host, and a transport
3506 filter was specified for the transport, Exim sent two messages over the
3507 same TCP/IP connection, and then failed with "socket operation on non-
3508 socket" when it tried to send the third.
3509
351026. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3511
351227. The extern definition of crypt16() in expand.c was not being excluded when
3513 the OS had its own crypt16() function.
3514
351528. Added bounce_return_body as a new option, and bounce_return_size_limit
3516 as a preferred synonym for return_size_limit, both as an option and as an
3517 expansion variable.
3518
351929. Added LIBS=-liconv to OS/Makefile-OSF1.
3520
352130. Changed the default configuration ACL to relax the local part checking rule
3522 for addresses that are not in any local domains. For these addresses,
3523 slashes and pipe symbols are allowed within local parts, but the sequence
3524 /../ is explicitly forbidden.
3525
352631. SPA server authentication was not clearing the challenge buffer before
3527 using it.
3528
352932. log_message in a "warn" ACL statement was writing to the reject log as
3530 well as to the main log, which contradicts the documentation and doesn't
3531 seem right (because no rejection is happening). So I have stopped it.
3532
353333. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3534 However, I am unable to do any testing of this.
3535
353634. Fixed an infelicity in the appendfile transport. When checking directories
3537 for a mailbox, to see if any needed to be created, it was accidentally
3538 using path names with one or more superfluous leading slashes; tracing
3539 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3540
354135. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3542 contents are added to the log line that is written for every discarded
3543 recipient. (Previously a log_message setting was ignored.)
3544
354536. The ${quote: operator now quotes the string if it is empty.
3546
354737. The install script runs exim in order to find its version number. If for
3548 some reason other than non-existence or emptiness, which it checks, it
3549 could not run './exim', it was installing it with an empty version number,
3550 i.e. as "exim-". This error state is now caught, and the installation is
3551 aborted.
3552
355338. An argument was missing from the function that creates an error message
3554 when Exim fails to connect to the socket for saslauthd authentication.
3555 This could cause Exim to crash, or give a corrupted message.
3556
355739. Added isip, isip4, and isip6 to ${if conditions.
3558
355940. The ACL variables $acl_xx are now saved with the message, and can be
3560 accessed later in routers, transports, and filters.
3561
356241. The new lookup type nwildlsearch is like wildlsearch, except that the key
3563 strings in the file are not string-expanded.
3564
356542. If a MAIL command specified a SIZE value that was too large to fit into an
3566 int variable, the check against message_size_limit failed. Such values are
3567 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3568 day this will have to be increased, but I don't think I want to be around
3569 when emails are that large.
3570
3571
3572
3573Exim version 4.22
3574-----------------
3575
3576 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3577 iconv() is not standard in FreeBSD.
3578
3579 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3580 IPv6 enabled. The observed symptom was a segmentation fault on return from
3581 the function os_common_find_running_interfaces() in src/os.c.
3582
3583 3. In the check_special_case() function in daemon.c I had used "errno" as an
3584 argument name, which causes warnings on some systems. This was basically a
3585 typo, since it was named "eno" in the comments!
3586
3587 4. The code that waits for the clock to tick (at a resolution of some fraction
3588 of a second) so as to ensure message-id uniqueness was always waiting for
3589 at least one whole tick, when it could have waited for less. [This is
3590 almost certainly not relevant at current processor speeds, where it is
3591 unlikely to ever wait at all. But we try to future-proof.]
3592
3593 5. The function that sleeps for a time interval that includes fractions of a
3594 second contained a race. It did not block SIGALRM between setting the
3595 timer, and suspending (a couple of lines later). If the interval was short
3596 and the sigsuspend() was delayed until after it had expired, the suspension
3597 never ended. On busy systems this could lead to processes getting stuck for
3598 ever.
3599
3600 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3601 process, before it forks any delivery processes. The open lookup caching
3602 mechanism meant that the open file or database connection was passed into
3603 the delivery process. The problem was that delivery processes always tidy
3604 up cached lookup data. This could cause a problem for the next delivery
3605 process started by the queue runner, because the external queue runner
3606 process does not know about the closure. So the next delivery process
3607 still has data in the lookup cache. In the case of a file lookup, there was
3608 no problem because closing a file descriptor in a subprocess doesn't affect
3609 the parent. However, if the lookup was caching a connection to a database,
3610 the connection was closed, and the second delivery process was likely to
3611 see errors such as "PGSQL: query failed: server closed the connection
3612 unexpectedly". The problem has been fixed by closing all cached lookups
3613 in a queue runner before running a delivery process.
3614
3615 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3616 seem to have the "const" qualifier which it has on other OS. I've
3617 parameterised it.
3618
3619 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3620 *of the same type* (client or server) with the same public name that an
3621 error should be diagnosed.
3622
3623 9. When Exim looked up a host name for an IP address, but failed to find the
3624 original IP address when looking up the host name (a safety check), it
3625 output the message "<ip address> does not match any IP for NULL", which was
3626 confusing, to say the least. The bug was that the host name should have
3627 appeared instead of "NULL".
3628
362910. Since release 3.03, if Exim is called by a uid other than root or the Exim
3630 user that is built into the binary, and the -C or -D options is used, root
3631 privilege is dropped before the configuration file is read. In addition,
3632 logging is switched to stderr instead of the normal log files. If the
3633 configuration then re-defines the Exim user, the unprivileged environment
3634 is probably not what is expected, so Exim logs a panic warning message (but
3635 proceeds).
3636
3637 However, if deliver_drop_privilege is set, the unprivileged state may well
3638 be exactly what is intended, so the warning has been cut out in that case,
3639 and Exim is allowed to try to write to its normal log files.
3640
3641
3642Exim version 4.21
3643-----------------
3644
3645 1. smtp_return_error_details was not giving details for temporary sender
3646 or receiver verification errors.
3647
3648 2. Diagnose a configuration error if two authenticators have the same public
3649 name.
3650