Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
a9ccd69a 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.368 2006/07/06 14:19:50 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
478be7b0
SC
6Exim version 4.63
7-----------------
8
9SC/01 Use a glob alias rather than an array ref in eximstats generated
10 parser. This improves both readability and performance.
11
12SC/02 Collect SpamAssassin and rejection statistics in eximstats.
13 Don't display local sender or destination tables in eximstats unless
14 there is data to show.
15 Added average volumes into the eximstats top table text output.
16
17SC/03 Collect data on the number of addresses (recipients) as well
18 as the number of messages in eximstats.
19
2b965a65
TF
20TF/01 Correct an error in the documentation for the redirect router. Exim
21 does (usually) call initgroups() when daemonizing.
478be7b0 22
45b91596
PH
23TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
24 with consistent privilege compared to when running as a daemon.
478be7b0 25
c59f5781
TF
26TF/03 Note in the spec that $authenticated_id is not set for local
27 submissions from trusted users.
28
90fc3069
TF
29TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
30 Thanks to Dean Brooks <dean@iglou.com> for the patch.
31
6083aca0
TF
32TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
33 by adding some example configuration directives to the default
34 configuration file. A little bit of work is required to uncomment the
35 directives and define how usernames and passwords are checked, but
36 there is now a framework to start from.
37
765b530f
PH
38PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
39 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
40 without this. I don't know how relevant this is to other LDAP libraries.
41
4e167a8c
PH
42PH/02 Add the verb name to the "unknown ACL verb" error.
43
4608d683
PH
44PH/03 Magnus Holmgren's patch for filter_prepend_home.
45
b8dc3e4a
PH
46PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
47
5418e93b
PH
48PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
49 directory not expanded when it should be if an expanded home directory
50 was set for the address (which is overridden by the transport).
51
b4a9bda2
PH
52PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
53 libradius.
54
45b91596
PH
55PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
56 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
57 because it is too late at that time, and has no effect.
58
5547e2c5
PH
59PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
60 security issue with \' (bugzilla #107). I could not use the
61 PQescapeStringConn() function, because it needs a PGconn value as one of
62 its arguments.
63
dbcef0ea
PH
64PH/08 When testing addresses using -bt, indicate those final addresses that
65 are duplicates that would not cause an additional delivery. At least one
66 person was confused, thinking that -bt output corresponded to deliveries.
67 (Suppressing duplicates isn't a good idea as you lose the information
68 about possibly different redirections that led to the duplicates.)
69
25257489
PH
70PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
71 systems where poll() doesn't work, in particular OS X.
72
c816d124
PH
73PH/10 Added more information to debugging output for retry time not reached.
74
a9ccd69a
PH
75PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
76 operations in malware.c.
77
c59f5781 78
c887c79e
TF
79Exim version 4.62
80-----------------
81
82TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
83 other effects) broke the use of negated acl sub-conditions.
84
1cce3af8
PH
85PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
86 patch).
87
afb3eaaf
PH
88PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
89 "Deny" causes Exim to reject the incoming connection with a 554 error.
90 Unfortunately, if there is a major crisis, such as a disk failure,
91 tcp-wrappers gives "deny", whereas what one would like would be some
92 kind of temporary error. A kludge has been added to help with this.
93 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
94 554 error is used if errno is still zero or contains ENOENT (which occurs
95 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
96 451 error is used.
97
e173618b
PH
98PH/03 Add -lutil to the default FreeBSD LIBS setting.
99
dd16e114
PH
100PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
101 errors. Otherwise a message that provokes a temporary error (when other
102 messages do not) can cause a whole host to time out.
103
f7fd3850
PH
104PH/05 Batch deliveries by appendfile and pipe transports did not work when the
105 addresses were routed directly to files or pipes from a redirect router.
106 File deliveries just didn't batch; pipe deliveries might have suffered
107 odd errors.
108
d87df92c
PH
109PH/06 A failure to get a lock for a hints database would erroneously always say
110 "Failed to get write lock", even when it was really a read lock.
111
7e9f683d
PH
112PH/07 The appendfile transport was creating MBX lock files with a fixed mode
113 of 0600. This has been changed to use the value of the lockfile_mode
114 option (which defaults to 0600).
115
bfad5236
PH
116PH/08 Applied small patch from the Sieve maintainer.
117
01c490df
PH
118PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
119 folder from quota calculations, a direct delivery into this folder messed
120 up the contents of the maildirsize file. This was because the regex was
121 used only to exclude .Trash (or whatever) when the size of the mailbox
122 was calculated. There was no check that a delivery was happening into an
123 excluded directory. This bug has been fixed by ignoring all quota
124 processing for deliveries into excluded directories.
125
d6629cdc
PH
126PH/10 Added the maildirfolder_create_regex option to appendfile.
127
1cce3af8 128
214e2000
PH
129Exim version 4.61
130-----------------
131
132PH/01 The code for finding all the local interface addresses on a FreeBSD
133 system running IPv6 was broken. This may well have applied to all BSD
134 systems, as well as to others that have similar system calls. The broken
135 code found IPv4 interfaces correctly, but gave incorrect values for the
136 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
137 that it would not match correctly against @[] and not recognize the IPv6
138 addresses as local.
139
f9daeae0
PH
140PH/02 The ipliteral router was not recognizing addresses of the form user@
141 [ipv6:....] because it didn't know about the "ipv6:" prefix.
142
7e66e54d
PH
143PH/03 Added disable_ipv6.
144
c8ea1597
PH
145PH/04 Changed $reply_address to use the raw form of the headers instead of the
146 decoded form, because it is most often used to construct To: headers
147 lines in autoreplies, and the decoded form may well be syntactically
148 invalid. However, $reply_address has leading white space removed, and all
149 newlines turned into spaces so that the autoreply transport does not
150 grumble.
151
911f6fde
PH
152PH/05 If group was specified without a user on a router, and no group or user
153 was specified on a transport, the group from the router was ignored.
154
47ca6d6c
PH
155PH/06 Increased the number of ACL variables to 20 of each type, and arranged
156 for visible compile-time settings that can be used to change these
157 numbers, for those that want even more. Backwards compatibility with old
158 spool files has been maintained. However, going back to a previous Exim
159 release will lost any variables that are in spool files.
160
ed0e9820
PH
161PH/07 Two small changes when running in the test harness: increase delay when
162 passing a TCP/IP connection to a new process, in case the original
163 process has to generate a bounce, and remove special handling of
164 127.0.0.2 (sic), which is no longer necessary.
165
eff37e47
PH
166PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
167 be the same on different OS.
168
1921d2ea
PH
169PH/09 Moved a debug statement in filter processing to avoid a race problem when
170 testing.
171
b3f69ca8
JJ
172JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
173 whether --show-vars was specified or not
174
175JJ/02 exipick: Added support for new ACL variable spool format introduced
176 in 4.61-PH/06
177
424a1c63
PH
178PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
179 syntactically invalid From: or Reply-to: line, and a filter used this to
180 generate an autoreply, and therefore failed to obtain an address for the
181 autoreply, Exim could try to deliver to a non-existent relative file
182 name, causing unrelated and misleading errors. What now happens is that
183 it logs this as a hard delivery error, but does not attempt to create a
184 bounce message.
185
7a100415
PH
186PH/11 The exinext utility has a -C option for testing purposes, but although
187 the given file was scanned by exinext itself; it wasn't being passed on
188 when Exim was called.
189
19b9dc85
PH
190PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
191 an end-of-file indication when reading a command response.
192
309bd837
PH
193PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
194 compiled. In many other places in Exim, IPv6 addresses are always
195 recognized, so I have changed this. It also means that IPv4 domain
196 literals of the form [IPV4:n.n.n.n] are now always recognized.
197
59e82a2a
PH
198PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
199 used if the router is not running as root, for example, when verifying at
200 ACL time, or when using -bh. The debugging output from this situation was
201 non-existent - all you got was a failure to exec. I have made two
202 changes:
203
204 (a) Failures to set uid/gid, the current directory, or a process leader
205 in a subprocess such as that created by queryprogram now generate
206 suitable debugging ouput when -d is set.
207
208 (b) The queryprogram router detects when it is not running as root,
209 outputs suitable debugging information if -d is set, and then runs
210 the subprocess without attempting to change uid/gid.
211
9edc04ce
PH
212PH/15 Minor change to Makefile for building test_host (undocumented testing
213 feature).
214
1349e1e5
PH
215PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
216 additional section of a DNS packet that returns MX or SRV records.
217 Instead, it always explicitly searches for A/AAAA records. This avoids
218 major problems that occur when a DNS server includes only records of one
219 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
220 fixed another bug: if SRV records were looked up and the corresponding
221 address records were *not* found in the additional section, the port
222 values from the SRV records were lost.
223
ea49d0e1
PH
224PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
225 using the correct key (the original address) when searching the retry
226 rules in order to find which one to use for generating the retry hint.
227
064a94c9
PH
228PH/18 If quota_warn_message contains a From: header, Exim now refrains from
229 adding the default one. Similarly, if it contains a Reply-To: header, the
230 errors_reply_to option, if set, is not used.
231
727071f8
PH
232PH/19 When calculating a retry time, Exim used to measure the "time since
233 failure" by looking at the "first failed" field in the retry record. Now
234 it does not use this if it is later than than the arrival time of the
235 message. Instead it uses the arrival time. This makes for better
236 behaviour in cases where some deliveries succeed, thus re-setting the
237 "first failed" field. An example is a quota failure for a huge message
238 when small messages continue to be delivered. Without this change, the
239 "time since failure" will always be short, possible causing more frequent
240 delivery attempts for the huge message than are intended.
dd16e114 241 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 242
f78eb7c6
PH
243PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
244 $1, $2, $3) because the numerical variables can be reset during some
245 expansion items (e.g. "match"), thereby losing the authentication data.
246
21c28500
PH
247PH/21 Make -bV show the size of off_t variables so that the test suite can
248 decide whether to run tests for quotas > 2G.
249
250PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
251 mailbox_size, and mailbox_filecount in the appendfile transport. If a
252 filecount value is greater than 2G or if a quota value is greater than 2G
253 on a system where the size of off_t is not greater than 4, a panic error
254 is given.
255
1688f43b
PH
256PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
257 never match. The debug and -bh output now contains an explicit error
258 message indicating a malformed IPv4 address or mask.
259
260PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
261 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
262 PH/23 above applies.
263
9675b384
PH
264PH/25 Do not write to syslog when running in the test harness. The only
265 occasion when this arises is a failure to open the main or panic logs
266 (for which there is an explicit test).
267
6a3f1455
PH
268PH/26 Added the /no_tell option to "control=freeze".
269
dac79d3e
PH
270PH/27 If a host name lookup failed very early in a connection, for example, if
271 the IP address matched host_lookup and the reverse lookup yielded a name
272 that did not have a forward lookup, an error message of the form "no IP
273 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
274 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 275
5977a0b3
PH
276PH/28 An enabling patch from MH: add new function child_open_exim2() which
277 allows the sender and the authenticated sender to be set when
278 submitting a message from within Exim. Since child_open_exim() is
279 documented for local_scan(), the new function should be too.
280
c91535f3
PH
281PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
282 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
283 results in an empty string is now treated as unset.
284
0d46a8c8
PH
285PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
286
278c6e6c
PH
287PH/31 Added sender_verify_fail logging option.
288
2cbb4081
PH
289PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
290 needed by RFC 822 but not by RFC 2822 was commented out. I have now
291 tidied the source and removed it altogether.
292
3eef829e
PH
293PH/33 When a queue run was abandoned because the load average was too high, a
294 log line was always written; now it is written only if the queue_run log
295 selector is set. In addition, the log line for abandonment now contains
296 information about the queue run such as the pid. This is always present
297 in "start" and "stop" lines but was omitted from the "abandon" line.
298
1ab95fa6
PH
299PH/34 Omit spaces between a header name and the colon in the error message that
300 is given when verify = headers_syntax fails (if there are lots of them,
301 the message gets confusing).
302
230205fc
PH
303PH/35 Change the default for dns_check_names_pattern to allow slashes within
304 names, as there are now some PTR records that contain slashes. This check
305 is only to protect against broken name servers that fall over on strange
306 characters, so the fact that it applies to all lookups doesn't matter.
307
75e0e026
PH
308PH/36 Now that the new test suite is complete, we can remove some of the
309 special code in Exim that was needed for the old test suite. For example,
310 sorting DNS records because real resolvers return them in an arbitrary
311 order. The new test suite's fake resolver always returns records in the
312 same order.
313
314PH/37 When running in the test harness, use -odi for submitted messages (e.g.
315 bounces) except when queue_only is set, to avoid logging races between
316 the different processes.
317
145396a6
PH
318PH/38 Panic-die if .include specifies a non-absolute path.
319
3cd34f13
PH
320PH/39 A tweak to the "H" retry rule from its user.
321
11121d3d
JJ
322JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
323 a label. They prevented compilation on older perls.
324
325JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
326 a warning to be raised on newish perls.
327
328JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
329 on queue. Changes to match documented behaviour of showing count of
330 messages matching specified criteria.
331
8def5aaf
PH
332PH/40 Changed the default ident timeout from 30s to 5s.
333
929ba01c
PH
334PH/41 Added support for the use of login_cap features, on those BSD systems
335 that have them, for controlling the resources used by pipe deliveries.
336
2632889e
PH
337PH/42 The content-scanning code uses fopen() to create files in which to put
338 message data. Previously it was not paying any attention to the mode of
339 the files. Exim runs with umask(0) because the rest of the code creates
340 files with open(), and sets the required mode explicitly. Thus, these
341 files were ending up world-writeable. This was not a big issue, because,
342 being within the spool directory, they were not world-accessible. I have
343 created a function called modefopen, which takes an additional mode
344 argument. It sets umask(777), creates the file, chmods it to the required
345 mode, then resets the umask. All the relevant calls to fopen() in the
346 content scanning code have been changed to use this function.
347
944a9c55
PH
348PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
349 to 24 hours. This avoids potential overflow problems when processing G
350 and H retry rules. I suspect nobody ever tinkers with this value.
351
4a23603b
PH
352PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
353
4730f942
PH
354PH/45 When the plaintext authenticator is running as a client, the server's
355 challenges are checked to ensure they are valid base64 strings. By
356 default, the authentication attempt is cancelled if an invalid string is
357 received. Setting client_ignore_invalid_base64 true ignores these errors.
358 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
359 they are received. Thus, the responses can be made to depend on the
360 challenges. If an invalid string is ignored, an empty string is placed in
361 the variable.
362
30dba1e6
PH
363PH/46 Messages that are created by the autoreply transport now contains a
364 References: header, in accordance with RFCs 2822 and 3834.
365
382afc6b
PH
366PH/47 Added authenticated_sender_force to the smtp transport.
367
a86229cf
PH
368PH/48 The ${prvs expansion was broken on systems where time_t was long long.
369
50c99ba6
PH
370PH/49 Installed latest patch from the Sieve maintainer.
371
d35e429d
PH
372PH/50 When an Exim quota was set without a file count quota, and mailbox_size
373 was also set, the appendfile transport was unnecessarily scanning a
374 directory of message files (e.g. for maildir delivery) to find the count
375 of files (along with the size), even though it did not need this
376 information. It now does the scan only if it needs to find either the
377 size of the count of files.
378
f90d018c
PH
379PH/51 Added ${time_eval: to convert Exim time strings into seconds.
380
75def545
PH
381PH/52 Two bugs concerned with error handling when the smtp transport is
382 used in LMTP mode:
383
384 (i) Exim was not creating retry information for temporary errors given
385 for individual recipients after the DATA command when the smtp transport
386 was used in LMTP mode. This meant that they could be retried too
387 frequently, and not timed out correctly.
388
389 (ii) Exim was setting the flag that allows error details to be returned
390 for LMTP errors on RCPT commands, but not for LMTP errors for individual
391 recipients that were returned after the DATA command.
392
393PH/53 This is related to PH/52, but is more general: for any failing address,
394 when detailed error information was permitted to be returned to the
395 sender, but the error was temporary, then after the final timeout, only
396 "retry timeout exceeded" was returned. Now it returns the full error as
397 well as "retry timeout exceeded".
398
c46782ef
PH
399PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
400 do this, and (what is worse) MTAs that accept it.
401
71fafd95
PH
402PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
403 will now be deprecated.
404
2c5db4fd
PH
405PH/56 New os.c-cygwin from the Cygwin maintainer.
406
9cf6b11a
JJ
407JJ/06 exipick: added --unsorted option to allow unsorted output in all output
408 formats (previously only available in exim formats via -bpr, -bpru,
409 and -bpra. Now also available in native and exiqgrep formats)
410
411JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
412 with very large, slow to parse queues
413
414JJ/08 exipick: added ! as generic prefix to negate any criteria format
415
416JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
417
898d150f
PH
418PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
419 responses to authentication challenges, though it was showing the
420 challenges; (ii) I've removed the CR characters from the debug output for
421 SMTP output lines.
422
46218253
PH
423PH/58 Allow for the insertion of a newline as well as a space when a string
424 is turned into more than one encoded-word during RFC 2047 encoding. The
425 Sieve code now uses this.
426
e97957bc
PH
427PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
428 data_4xx, lost_connection, tls_required.
429
81e509d7
PH
430PH/60 When a VRFY deferred or FAILED, the log message rather than the user
431 message was being sent as an SMTP response.
432
3d240ff7
PH
433PH/61 Add -l and -k options to exicyclog.
434
b37c4101
PH
435PH/62 When verifying, if an address was redirected to one new address, so that
436 verification continued, and the new address failed or deferred after
437 having set something in $address_data, the value of $address_data was not
438 passed back to the ACL. This was different to the case when no
439 redirection occurred. The value is now passed back in both cases.
440
79378e0f
PH
441PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
442 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
443 use login_cap.h, so on its own it isn't the distinguishing feature. The
444 new name refers directly to the setclassresources() function.
445
e49c7bb4
PH
446PH/65 Added configuration files for NetBSD3.
447
d114ec46
PH
448PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
449
f3d7df6c
PH
450PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
451 is preferred over IPv4.
452
715ab376
PH
453PH/68 The bounce_return_message and bounce_return_body options were not being
454 honoured for bounces generated during the reception of non-SMTP messages.
455 In particular, this applied to messages rejected by the ACL. This bug has
456 been fixed. However, if bounce_return_message is true and bounce_return_
457 body is false, the headers that are returned for a non-SMTP message
458 include only those that have been read before the error was detected.
459 (In the case of an ACL rejection, they have all been read.)
460
6b31b150
PH
461PH/69 The HTML version of the specification is now built in a directory called
462 spec_html instead of spec.html, because the latter looks like a path with
463 a MIME-type, and this confuses some software.
464
465PH/70 Catch two compiler warnings in sieve.c.
466
d515a917
PH
467PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
468 function verify_get_ident() calls ip_connect() to connect a socket, but
469 if the "connect()" function timed out, ip_connect() used to close the
470 socket. However, verify_get_ident() also closes the socket later, and in
471 between Exim writes to the log, which may get opened at this point. When
472 the socket was closed in ip_connect(), the log could get the same file
473 descriptor number as the socket. This naturally causes chaos. The fix is
474 not to close the socket in ip_connect(); the socket should be closed by
475 the function that creates it. There was only one place in the code where
476 this was missing, in the iplookup router, which I don't think anybody now
477 uses, but I've fixed it anyway.
478
9b8fadde
PH
479PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
480 well as to direct DNS lookups. Otherwise the handling of names in host
481 lists is inconsistent and therefore confusing.
482
214e2000 483
5de37277
PH
484Exim version 4.60
485-----------------
486
cc38ddbf
PH
487PH/01 Two changes to the default runtime configuration:
488
489 (1) Move the checks for relay_from_hosts and authenticated clients from
490 after to before the (commented out) DNS black list checks.
491
492 (2) Add control=submission to the relay_from_hosts and authenticated
493 clients checks, on the grounds that messages accepted by these
494 statements are most likely to be submissions.
5de37277 495
72fdd6ae
PH
496PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
497
498 (1) Generate an error if the third argument for the ${prvs expansion is
499 not a single digit.
500
501 (2) Treat a missing third argument of ${prvscheck as if it were an empty
502 string.
503
504 (3) Reset the variables that are obtained from the first argument of
505 ${prvscheck and used in the second argument before leaving the code,
506 because their memory is reclaimed, so using them afterwards may do
507 silly things.
508
509 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
510 one (it's much easier than Tom thought :-).
511
512 (5) Because of (4), we can now allow for the use of $prvscheck_result
513 inside the third argument.
cb9328de 514
cb741023
PH
515PH/03 For some reason, the default setting of PATH when running a command from
516 a pipe transport was just "/usr/bin". I have changed it to
517 "/bin:/usr/bin".
518
f174f16e
PH
519PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
520 anything to be listed in the output from -bV.
b2f5a032 521
c25242d7
PH
522PH/05 When a filter generated an autoreply, the entire To: header line was
523 quoted in the delivery log line, like this:
524
525 => >A.N.Other <ano@some.domain> <original@ddress> ...
526
527 This has been changed so that it extracts the operative address. There
528 may be more than one such address. If so, they are comma-separated, like
529 this:
530
531 => >ano@some.domain,ona@other.domain <original@ddress> ...
532
82c19f95
PH
533PH/06 When a client host used a correct literal IP address in a HELO or EHLO
534 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
535 not being looked up in the rDNS to get a host name, Exim was showing the
536 IP address twice in Received: lines, even though the IP addresses were
537 identical. For example:
538
539 Received: from [1.2.3.4] (helo=[1.2.3.4])
540
541 However, if the real host name was known, it was omitting the HELO data
542 if it matched the actual IP address. This has been tidied up so that it
543 doesn't show the same IP address twice.
544
d7ffbc12
PH
545PH/07 When both +timestamp and +memory debugging was on, the value given by
546 $tod_xxx expansions could be wrong, because the tod_stamp() function was
547 called by the debug printing, thereby overwriting the timestamp buffer.
548 Debugging no longer uses the tod_stamp() function when +timestamp is set.
549
9f526266
PH
550PH/08 When the original message was included in an autoreply transport, it
551 always said "this is a copy of the message, including all the headers",
552 even if body_only or headers_only was set. It now gives an appropriate
553 message.
554
87fcc8b9
PH
555PH/09 Applied a patch from the Sieve maintainer which:
556
557 o fixes some comments
558 o adds the (disabled) notify extension core
559 o adds some debug output for the result of if/elsif tests
560 o points to the current vacation draft in the documentation
561 and documents the missing references header update
562
563 and most important:
564
565 o fixes a bug in processing the envelope test (when testing
566 multiple envelope elements, the last element determinted the
567 result)
568
456682f5
PH
569PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
570 Electronic Mail") by including:
571
572 Auto-submitted: auto-generated
573
574 in the messages that it generates (bounce messages and others, such as
575 warnings). In the case of bounce messages for non-SMTP mesages, there was
576 also a typo: it was using "Auto_submitted" (underscore instead of
577 hyphen). Since every message generated by Exim is necessarily in response
578 to another message, thes have all been changed to:
579
580 Auto-Submitted: auto-replied
581
582 in accordance with these statements in the RFC:
583
584 The auto-replied keyword:
585
586 - SHOULD be used on messages sent in direct response to another
587 message by an automatic process,
588
589 - MUST NOT be used on manually-generated messages,
590
591 - MAY be used on Delivery Status Notifications (DSNs) and Message
592 Disposition Notifications (MDNs),
593
594 - MUST NOT be used on messages generated by automatic or periodic
595 processes, except for messages which are automatic responses to
596 other messages.
597
3e46c1aa
PH
598PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
599 to the default Received: header definition.
456682f5 600
49826d12
PH
601PH/12 Added log selector acl_warn_skipped (default on).
602
eba0c039
PH
603PH/13 After a successful wildlsearch lookup, discard the values of numeric
604 variables because (a) they are in the wrong storage pool and (b) even if
605 they were copied, it wouldn't work properly because of the caching.
606
a0d6ba8a
PH
607PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
608 checking when decoding. Apparently there are clients that generate
609 overlong encoded strings. Why am I not surprised?
610
f0917727
PH
611PH/15 If the first argument of "${if match_address" was not empty, but did not
612 contain an "@" character, Exim crashed. Now it writes a panic log message
613 and treats the condition as false.
614
096fee00
PH
615PH/16 In autoreply, treat an empty string for "once" the same as unset.
616
024bd3c2
PH
617PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
618 extension "envelope-auth". The code is finished and in agreement with
619 other implementations, but there is no documentation so far and in fact,
620 nobody wrote the draft yet. This extension is currently #undef'ed, thus
621 not changing the active code.
622
623 Print executed "if" and "elsif" statements when debugging is used. This
624 helps a great deal to understand what a filter does.
625
626 Document more things not specified clearly in RFC3028. I had all this
627 sorted out, when out of a sudden new issues came to my mind. Oops."
628
df199fec
PH
629PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
630 (Bugzilla #53).
631
d27f1df3
PH
632PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
633 canonical form (as documented). However, after a host name lookup from
634 the IP address, check_host() was doing a simple string comparison with
635 addresses acquired from the DNS when checking that the found name did
636 have the original IP as one of its addresses. Since any found IPv6
637 addresses are likely to be in abbreviated form, the comparison could
638 fail. Luckily, there already exists a function for doing the comparison
639 by converting both addresses to binary, so now that is used instead of
640 the text comparison.
641
96776534
PH
642PH/20 There was another similar case to PH/19, when a complete host name was
643 given in a host list; looking up its IP address could give an abbreviated
644 form, whereas the current host's name might or might not be abbreviated.
645 The same fix has been applied.
646
5de37277 647
9a799bc0
PH
648Exim version 4.54
649-----------------
650
651PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
652 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
653 It now does.
654
99a4b039
PH
655PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
656 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
657
658PH/03 Typo: missing ".o" in src/pcre/Makefile.
659
4b233853
PH
660PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
661 header line, restrict the check to what is listed in RFCs 2369 and 2929.
662 Also, for "Auto-Submitted", treat anything other than "no" as
663 non-personal, in accordance with RFC 3834. (Previously it treated
664 anything starting "auto-" as non-personal.)
665
8857ccfd
PH
666TF/01 The control=submission/name=... option had a problem with syntax
667 errors if the name included a slash character. The /name= option
668 now slurps the rest of the string, so it can include any characters
669 but it must come last in the list of options (after /sender_retain
670 or /domain=).
671
433a2980
PH
672PH/05 Some modifications to the interface to the fake nameserver for the new
673 testing suite.
674
3e46c1aa 675
9a799bc0 676
e3a311ba
TK
677Exim version 4.53
678-----------------
679
680TK/01 Added the "success_on_redirect" address verification option. See
681 NewStuff for rationale and an example.
682
13b685f9
PH
683PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
684
395ff96d
PH
685PH/02 Patch to exigrep to allow it to work on syslog lines.
686
5b68f6e4
PH
687PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
688 fread() to skip over the body file's header line, because in Cygwin the
689 header line is locked and is inaccessible.
690
1ab52c69
PH
691PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
692 co-exist for some time) to make it clear that it is the Exim ID that is
693 referenced, not the Message-ID: header line.
694
b07e6aa3
PH
695PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
696 string_format() function, because snprintf() does not exist on all
697 operating systems.
698
254e032f
PH
699PH/06 The use of forbid_filter_existstest now also locks out the use of the
700 ${stat: expansion item.
701
3af76a81
PH
702PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
703 protocol synchronization error", to keep the pedants happy.
704
2548ba04
PH
705PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
706 well as for IRIX systems, when gcc is being used. See the host.c source
707 file for comments.
708
b6c6011d
PH
709PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
710
cf39cf57
PH
711PH/10 Named domain lists were not working if used in a queue_smtp_domains
712 setting.
713
f1513293
PH
714PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
715 transport and to the smtp transport in LMTP mode.
716
727549a4
PH
717TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
718
af46795e
PH
719PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
720 run a filter in a subprocess. This could lead to confusion in subsequent
721 lookups in the parent process. There should also be a search_tidyup() at
722 the end of the subprocess.
723
d7b47fd0
PH
724PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
725 only if the host matched helo_try_verify_hosts, which caused the
726 verification to occur when the EHLO/HELO command was issued. The ACL just
727 tested the remembered result. Now, if a previous verification attempt has
728 not happened, "verify = helo" does it there and then.
729
ee744174
JJ
730JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
731
b582ab87
PH
732TK/03 Fix log output including CR from clamd.
733
41a13e0a
PH
734PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
735 exist provoked a memory error which could cause a segfault.
736
f625cc5a
PH
737PH/15 Installed PCRE 6.2
738
739PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
740
21f7af35
PH
741PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
742 of the problem. Specifically, suggested +O2 rather than +O1 for the
743 HP-UX compiler.
744
31480e42
PH
745PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
746
2d280592
PH
747PH/20 If a delivery was routed to a non-standard port by means of an SRV
748 record, the port was not correctly logged when the outgoing_port log
749 selector was set (it logged the transort's default port).
750
7cd1141b
PH
751PH/21 Added support for host-specific ports to manualroute, queryprogram,
752 fallback_hosts, and "hosts" in the smtp transport.
753
754PH/22 If the log selector "outgoing_port" is set, the port is now also given on
755 host errors such as "Connection refused".
756
750af86e
PH
757PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
758 authentication with radiusclient 0.4.9:
759
760 - Error returned from rc_read_config was caught wrongly
761 - Username/password not passed on to radius server due to wrong length.
762
763 The presumption is that some radiusclient API changes for 4.51/PH/17
764 were not taken care of correctly. The code is still untested by me (my
765 Linux distribution still has 0.3.2 of radiusclient), but it was
766 contributed by a Radius user.
767
768PH/24 When doing a callout, the value of $domain wasn't set correctly when
769 expanding the "port" option of the smtp transport.
770
4304270b
TK
771TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
772 while reading a MIME header. Thanks to Tom Hughes for a patch.
773
750af86e
PH
774PH/24 Include config.h inside local_scan.h so that configuration settings are
775 available.
776
64ffc24f
PH
777PH/25 Make $smtp_command_argument available after all SMTP commands. This means
778 that in an ACL for RCPT (for example), you can examine exactly what was
779 received.
780
5dd9625b
PH
781PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
782 commands, but it was not correctly comparing the address with the actual
783 client host address. Thus, it would show the EHLO address in Received:
784 header lines when this was not necessary.
785
5591031b
PH
786PH/27 Added the % operator to ${eval:}.
787
ba18e66a
PH
788PH/28 Exim tries to create and chdir to its spool directory when it starts;
789 it should be ignoring failures (because with -C, for example, it has lost
790 privilege). It wasn't ignoring creation failures other than "already
791 exists".
792
9cec981f
PH
793PH/29 Added "crypteq" to the list of supported features that Exim outputs when
794 -bV or -d is used.
795
aa2b5c79
PH
796PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
797 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
798 too many continuations, the temporary file was not being removed, and the
799 return code was incorrect.
aa2b5c79 800
48a53b7f
PH
801PH/31 Missing "BOOL" in function definition in filtertest.c.
802
1c59d63b
PH
803PH/32 Applied Sieve patches from the maintainer.
804
671012da
TK
805TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
806
1509d3a8
PH
807PH/33 Added "verify = not_blind".
808
809PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
810 Local/Makefile (with some defaults set). These are used in built scripts
811 such as exicyclog, but they have never been used in the exim_install
812 script (though there are many overriding facilities there). I have
813 arranged that the exim_install script now takes note of these two
814 settings.
815
816PH/35 Installed configuration files for Dragonfly.
817
2fe1a124
PH
818PH/36 When a locally submitted message by a trusted user did not contain a
819 From: header, and the sender address was obtained from -f or from an SMTP
820 MAIL command, and the trusted user did not use -F to supply a sender
821 name, $originator_name was incorrectly used when constructing a From:
822 header. Furthermore, $originator_name was used for submission mode
823 messages from external hosts without From: headers in a similar way,
824 which is clearly wrong.
825
8800895a
PH
826PH/37 Added control=suppress_local_fixups.
827
ccfdb010
PH
828PH/38 When log_selector = +received_sender was set, and the addition of the
829 sender made the log line's construction buffer exactly full, or one byte
830 less than full, an overflow happened when the terminating "\n" was
831 subsequently added.
832
1130bfb0
PH
833PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
834 when the result of a list match is failure because a DNS lookup failed.
835
ebcb507f
PH
836PH/40 RM_COMMAND is now used in the building process.
837
c35e155c
PH
838PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
839 the "build-* directories that it finds.
840
95d1f782
PH
841PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
842 address in a domain literal was a prefix of an interface address.
843
fd6de02e
PH
844PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
845 when verifying a sender address, unless rewrite_headers is false.
846
58de37c5
PH
847PH/44 Wrote a long comment about why errors_to addresses are verified as
848 recipients, not senders.
849
261cf466
TF
850TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
851 the ratelimit ACL was added.
852
3ee512ff
PH
853PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
854
e08c430f
PH
855PH/46 Added extra information about PostgreSQL errors to the error string.
856
bef5a11f
PH
857PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
858 avoiding the need to install special zones in a real server. This is
859 backwards compatible; if it can't find the fake resolver, it drops back.
860 Thus, both old and new test suites can be run.
861
7546de58
TF
862TF/02 Added util/ratelimit.pl
863
e5d5a95f
TF
864TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
865 clock is set back in time.
866
2e88a017
TF
867TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
868 Candler <B.Candler@pobox.com>.
869
a5f65aa4
TF
870TF/05 The fix for PH/43 was not completely correct; widen_domains is always
871 OK for addresses that are the result of redirections.
872
e7726cbf
PH
873PH/48 A number of further additions for the benefit of the new test suite,
874 including a fake gethostbyname() that interfaces to the fake DNS resolver
875 (see PH/47 above).
876
a7fdad5b
TF
877TF/06 The fix for widen_domains has also been applied to qualify_single and
878 search_parents which are the other dnslookup options that can cause
879 header rewrites.
880
6af56900
PH
881PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
882 type ("H").
883
0925ede6
PH
884PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
885
66afa403
TF
886TF/07 Exim produced the error message "an SRV record indicated no SMTP
887 service" if it encountered an MX record with an empty target hostname.
888 The message is now "an MX or SRV record indicated no SMTP service".
889
0154e85a
TF
890TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
891 if the DNS of the sending site is misconfigured. This is quite a
892 common situation. This change restores the behaviour of treating a
893 helo verification defer as a failure.
894
16f12c76
PH
895PH/51 If self=fail was set on a router, the bounce message did not include the
896 actual error message.
897
bbe902f0 898
e5a9dba6
PH
899Exim version 4.52
900-----------------
901
902TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
903
22c3b60b
PH
904PH/01 When a transport filter timed out in a pipe delivery, and the pipe
905 command itself ended in error, the underlying message about the transport
906 filter timeout was being overwritten with the pipe command error. Now the
907 underlying error message should be appended to the second error message.
908
06a9b4b5
PH
909TK/01 Fix poll() being unavailable on Mac OSX 10.2.
910
c1ac6996
PH
911PH/02 Reduce the amount of output that "make" produces by default. Full output
912 can still be requested.
913
9c7a242c
PH
914PH/03 The warning log line about a condition test deferring for a "warn" verb
915 was being output only once per connection, rather than after each
916 occurrence (because it was using the same function as for successful
917 "warn" verbs). This seems wrong, so I have changed it.
918
87ba3f5f
PH
919TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
920 it should not have, which might have caused a crash in the right
921 circumstances, but probably never did.
922
923PH/04 Installed a modified version of Tony Finch's patch to make submission
924 mode fix the return path as well as the Sender: header line, and to
925 add a /name= option so that you can make the user's friendly name appear
926 in the header line.
927
29aba418
TF
928TF/03 Added the control = fakedefer ACL modifier.
929
fe0dab11
TF
930TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
931 Mark Lowes for thorough testing.
870f6ba8 932
11d337a4
TK
933TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
934
935TK/03 Merged latest SRS patch from Miles Wilton.
936
415c8f3b
PH
937PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
938 with the definition in sysexits.h (which is #included earlier).
939 Fortunately, Exim does not actually use EX_OK. The code used to try to
940 preserve the sysexits.h value, by assumimg that macro definitions were
941 scanned for macro replacements. I have been disabused of this notion,
942 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 943
958541e9
PH
944PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
945 in the smtp transport. When a block could not be written in a single
946 write() function, the timeout was being re-applied to each part-write.
947 This seems wrong - if the receiver was accepting one byte at a time it
948 would take for ever. The timeout is now adjusted when this happens. It
949 doesn't have to be particularly precise.
950
c206415f
TK
951TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
952 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
953
2a4be8f9
PH
954PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
955 without a domain if the check to <postmaster@domain> fails.
956
1cba11c5
SC
957SC/01 Eximstats: added -xls and the ability to specify output files
958 (patch written by Frank Heydlauf).
959
960SC/02 Eximstats: use FileHandles for outputing results.
961
962SC/03 Eximstats: allow any combination of xls, txt, and html output.
963
964SC/04 Eximstats: fixed display of large numbers with -nvr option
965
966SC/05 Eximstats: fixed merging of reports with empty tables.
967
968SC/06 Eximstats: added the -include_original_destination flag
969
970SC/07 Eximstats: removed tabs and trailing whitespace.
971
1005d00e
TK
972TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
973
974TK/06 MBOX spool code: Add real "From " MBOX separator line
975 so the .eml file is really in mbox format (even though
976 most programs do not really care). Patch from Alex Miller.
977
978TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
979 The latter is generated from $received_to and is only set if the
980 message has one envelope recipient. SA can use these headers,
981 obviously out-of-the-box. Patch from Alex Miller.
982
9b4768fa
PH
983PH/08 The ${def test on a variable was returning false if the variable's
984 value was "0", contrary to what the specification has always said!
985 The result should be true unless the variable is empty.
986
987PH/09 The syntax error of a character other than { following "${if
988 def:variable_name" (after optional whitespace) was not being diagnosed.
989 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
990 accidental colon was present, for example, could give incorrect results.
991
0d7eb84a
PH
992PH/10 Tidied the code in a number of places where the st_size field of a stat()
993 result is used (not including appendfile, where other changes are about
994 to be made).
995
996PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
997 This involved changing a lot of size variables from int to off_t. It
998 should work with maildirs and everything.
999
40727bee
TK
1000TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1001 spamd dying while we are connected to it.
1002
554d2369
TF
1003TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1004 <jgh@wizmail.org>
1005
1f922db1
PH
1006PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1007 function for BDB 4.3.
1008
ef213c3b
PH
1009PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1010
8ac170f3
PH
1011PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1012 the sources for PCRE have been re-arranged and more files are now
1013 involved.
1014
b1c749bb
PH
1015PH/15 The code I had for printing potentially long long variables in PH/11
1016 above was not the best (it lost precision). The length of off_t variables
1017 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
1018 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1019 to be "long long int" or "long int". This is needed for the internal
1020 formatting function string_vformat().
b1c749bb 1021
4aac9b49
PH
1022PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1023 the configuration file to be ":syslog", then the script "guesses" where
1024 the logs files are, rather than using the compiled in default. In our
1025 case the guess is not the same as the compiled default, so the script
1026 suddenly stopped working when I started to use syslog. The patch checks
1027 to see if log_file_path is "". If so, it attempts to read it from exim
1028 with no configuration file to get the compiled in version, before it
1029 falls back to the previous guessing code."
1030
294520c8
TK
1031TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1032 implementing BATV in an Exim configuration. See NewStuff for the gory
1033 details.
1034
5bd022fe
PH
1035PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1036 Makefile that are specific to HP-UX.
1037
90e9ce59
PH
1038PH/18 If the "use_postmaster" option was set for a recipient callout together
1039 with the "random" option, the postmaster address was used as the MAIL
1040 FROM address for the random test, but not for the subsequent recipient
1041 test. It is now used for both.
1042
5ea81592
PH
1043PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1044 patch removes a few documentation additions to RFC 3028, because the
1045 latest draft now contains them. It adds the new en;ascii-case comparator
1046 and a new error check for 8bit text in MIME parts. Comparator and
1047 require names are now matched exactly. I enabled the subaddress
1048 extension, but it is not well tested yet (read: it works for me)."
1049
c6c2dc1d
PH
1050PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1051 rework some of the code of TK/09 above to avoid the hardwired use of
1052 "%lld" and "long long". Replaced the call to snprintf() with a call to
1053 string_vformat().
1054
fffffe4c
PH
1055PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1056 records point to non-existent hosts", "retry timeout exceeded", and
1057 "retry time not reached for any host after a long failure period".
ca02eafb 1058
9a26b6b2
PH
1059PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1060 experimental DomainKeys support:
1061
1062 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1063 (2) On an error such as an illegally used "control", the wrong name for
1064 the control was given.
1065
1066 These problems did NOT occur unless DomainKeys support was compiled.
1067
4aee0225
PH
1068PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1069
32d668a5
PH
1070PH/24 Added ${if match_ip condition.
1071
8187c3f3
PH
1072PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1073 databases so that it will be absolutely obvious if a crash occurs in the
1074 DB library. This is a regular occurrence (often caused by mis-matched
1075 db.h files).
1076
ff790e47 1077PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1078 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1079 picked up on a user's system that detects such things. There doesn't seem
1080 to be a gcc warning option for this - only an attribute that has to be
1081 put on the function's prototype. It seems that in Fedora Core 4 they have
1082 set this on a number of new functions. No doubt there will be more in due
1083 course.
ff790e47 1084
5417f6d1
PH
1085PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1086 specify a transport. However, if an address that was verified by such a
1087 router was the subject of a callout, Exim crashed because it tried to
1088 read the rcpt_include_affixes from the non-existent transport. Now it
1089 just assumes that the setting of that option is false. This bug was
1090 introduced by 4.51/PH/31.
1091
59cf8544
PH
1092PH/28 Changed -d+all to exclude +memory, because that information is very
1093 rarely of interest, but it makes the output a lot bigger. People tend to
1094 do -d+all out of habit.
1095
e7ad8a65
PH
1096PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1097 code in os-type was giving problems when libc.so lives in lib64, like on
1098 x86_64 Fedora Core.
1099
ade42478
PH
1100PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1101 aren't the modern standard, and it seems that some systems' include files
1102 don't always have them. Exim was already checking for some of the newer
1103 ones like T_AAAA, and defining it itself. I've added checks for all the
1104 record types that Exim uses.
1105
182ad5cf
PH
1106PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1107 not automatically generating a new one, as it is supposed to. This
1108 prevented TLS from working. If the file did exist, but contained invalid
1109 data, a new version was generated, as expected. It was only the case of a
1110 non-existent file that was broken.
1111
b0d9fc80
TK
1112TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1113 with a change in libdomainkeys > 0.64.
1114
1115TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1116 from DNS. If the selector record carries the flag, it now has
1117 precedence over the domain-wide flag.
1118
1119TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1120
47c7a64a
PH
1121PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1122 the use of a port name that isn't defined in /etc/services) occurred, the
1123 message was deferred as in a normal delivery, and thus remained on the
1124 spool, instead of being failed because of the mua_wrapper setting. This
1125 is now fixed, and I tidied up some of the mua_wrapper messages at the
1126 same time.
1127
a388bce4
SC
1128SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1129 the messages in a hash of arrays rather than using individual hashes.
1130 This is a bit cleaner and results in dramatic memory savings, albeit
1131 at a slight CPU cost.
1132
1133SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1134 as requested by Marc Sherman.
1135
1136SC/10 Eximstats: added histograms for user specified patterns as requested
1137 by Marc Sherman.
1138
0793e4ed
SC
1139SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1140
c58b88df
PH
1141PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1142 fopen() in the content-scanning modules that did not already have it.
1143
e7ad8a65 1144
7982096b
PH
1145Exim version 4.51
1146-----------------
1147
1a46a8c5
PH
1148TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1149 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1150
2f079f46 1151TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1152
1153TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1154
1155PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1156 to test Sieve filters that use "vacation".
1157
1158PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1159 that changes the way the GnuTLS parameters are stored in the cache file.
1160 The new format can be generated externally. For backward compatibility,
1161 if the data in the cache doesn't make sense, Exim assumes it has read an
1162 old-format file, and it generates new data and writes a new file. This
1163 means that you can't go back to an older release without removing the
1164 file.
1165
1166PH/03 A redirect router that has both "unseen" and "one_time" set does not
1167 work if there are any delivery delays because "one_time" forces the
1168 parent to be marked "delivered", so its unseen clone is never tried
1169 again. For this reason, Exim now forbids the simultaneous setting of
1170 these two options.
1171
1172PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1173 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1174 entry if you want to know the details. The fix, however, neglected to
1175 consider the case when local delivery batching is involved. The test for
1176 "previously delivered" was not happening when checking to see if an
1177 address could be batched with a previous (undelivered) one; under
1178 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1179 address.
1a46a8c5
PH
1180
1181PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1182 in its include files, and this causes problems building Exim.
1183
1184PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1185 header_syntax) but Exim was just ignoring anything given after a slash.
1186 In particular, this caused confusion with an attempt to use "verify =
1187 reverse_host_lookup/defer_ok". An error is now given when options are
1188 supplied for verify items that do not have them. (Maybe reverse_host_
1189 lookup should have a defer_ok option, but that's a different point.)
1190
1191PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1192 defined by RFC 821) to 2048, because there were problems with some AUTH
1193 commands, and RFC 1869 says the size should be increased for extended
1194 SMTP commands that take arguments.
1195
1196PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1197 Finch).
1198
1199PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1200 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1201
49c2d5ea
PH
1202PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1203 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1204 whatever). Otherwise the password may appear in the log. Following change
1205 PH/42 below, there is no longer a chance of it appearing in a bounce
1206 message.
49c2d5ea 1207
bf759a8b
PH
1208PH/11 Installed exipick version 20050225.0 from John Jetmore.
1209
83364d30
PH
1210PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1211 of its addresses was ever tried. (Bugzilla bug #2.)
1212
7999bbd7
PH
1213PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1214 the result incorrectly in the debug output. (It correctly added a newline
1215 to what was transported.)
1216
7dbf77c9
PH
1217TF/01 Added $received_time.
1218
74e0617f
PH
1219PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1220 commented out examples of how to interface to a virus scanner and to
1221 SpamAssassin. Also added commented examples of av_scanner and
1222 spamd_address settings.
1223
2f079f46
PH
1224PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1225 and controls are allowed in which ACLs. There were a couple of minor
1226 errors. Some of the entries in the conditions table (which is a table of
1227 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1228 negation of where the condition IS allowed.
1229
8c841523
PH
1230PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1231
7766a4f0
PH
1232PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1233 header file does not have a version number, so I've had to invent a new
1234 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1235 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1236 radiusclient), but it was contributed by a Radius user.
1237
8b417f2c
PH
1238PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1239 files or directories, for OpenSSL.
1240
901f42cb
PH
1241PH/19 When an Exim process that is running as root has to create an Exim log
1242 file, it does so in a subprocess that runs as exim:exim so as to get the
1243 ownership right at creation (otherwise, other Exim processes might see
1244 the file with the wrong ownership). There was no test for failure of this
1245 fork() call, which would lead to the process getting stuck as it waited
1246 for a non-existent subprocess. Forks do occasionally fail when resources
1247 run out. I reviewed all the other calls to fork(); they all seem to check
1248 for failure.
1249
f9b9210e
PH
1250PH/20 When checking for unexpected SMTP input at connect time (before writing
1251 the banner), Exim was not dealing correctly with a non-positive return
1252 from the read() function. If the client had disconnected by this time,
1253 the result was a log entry for a synchronization error with an empty
1254 string after "input=" when read() returned zero. If read() returned -1
1255 (an event I could not check), uninitialized data bytes were printed.
1256 There were reports of junk text (parts of files, etc) appearing after
1257 "input=".
1258
54cdb463
PH
1259PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1260
cf00dad6
PH
1261PH/22 Added support for macro redefinition, and (re)definition in between
1262 driver and ACL definitions.
1263
acb1b346
PH
1264PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1265 forgetting to use the resulting value; it was using the unexpanded value.
1266
c5ddb310
PH
1267PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1268 hadn't been configured. The fix is from Juergen Kreileder, who
1269 understands it better than I do:
1270
1271 "Here's what I see happening with three configured cyrus_sasl
1272 authenticators configured (plain, login, cram-md5):
1273
1274 On startup auth_cyrus_sasl_init() gets called for each of these.
1275 This means three calls to sasl_listmech() without a specified mech_list.
1276 => SASL tests which mechs of all available mechs actually work
1277 => three warnings about OTP not working
1278 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1279
1280 With the patch, sasl_listmech() also gets called three times. But now
1281 SASL's mech_list option is set to the server_mech specified in the the
1282 authenticator. Or in other words, the answer from sasl_listmech()
1283 gets limited to just the mech you're testing for (which is different
1284 for each call.)
1285 => the return list contains just 'plain' or 'login', 'cram-md5' or
1286 nothing depending on the value of ob->server_mech.
1287
1288 I've just tested the patch: Authentication still works fine,
1289 unavailable mechs specified in the exim configuration are still
1290 caught, and the auth.log warnings about OTP are gone."
1291
31619da6
PH
1292PH/25 When debugging is enabled, the contents of the command line are added
1293 to the debugging output, even when log_selector=+arguments is not
1294 specified.
1295
bebaf0fc
PH
1296PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1297 answer is "GNU", and only if the return is "GNU/something" is the answer
1298 "Linux".
1299
475fe28a
PH
1300PH/27 $acl_verify_message is now set immediately after the failure of a
1301 verification in an ACL, and so is available in subsequent modifiers. In
1302 particular, the message can be preserved by coding like this:
1303
1304 warn !verify = sender
1305 set acl_m0 = $acl_verify_message
1306
1307 Previously, $acl_verify_message was set only while expanding "message"
1308 and "log_message" when a very denied access.
1309
7e8bec7a
PH
1310PH/28 Modified OS/os.c-Linux with
1311
1312 -#ifndef OS_LOAD_AVERAGE
1313 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1314
1315 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1316 nomenclature these days.)
1317
e4a89c47
PH
1318PH/29 Installed patch from the Sieve maintainer that adds the options
1319 sieve_useraddress and sieve_subaddress to the redirect router.
1320
5ca2a9a1
PH
1321PH/30 In these circumstances:
1322 . Two addresses routed to the same list of hosts;
1323 . First host does not offer TLS;
1324 . First host accepts first address;
1325 . First host gives temporary error to second address;
1326 . Second host offers TLS and a TLS session is established;
1327 . Second host accepts second address.
1328 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1329 and peerdn, if requested) that were in fact used only for the second
1330 address.
7e8bec7a 1331
c688b954
PH
1332PH/31 When doing a callout as part of verifying an address, Exim was not paying
1333 attention to any local part prefix or suffix that was matched by the
1334 router that accepted the address. It now behaves in the same way as it
1335 does for delivery: the affixes are removed from the local part unless
1336 rcpt_include_affixes is set on the transport.
1337
fed77020
PH
1338PH/32 Add the sender address, as F=<...>, to the log line when logging a
1339 timeout during the DATA phase of an incoming message.
1340
7fe1560f
PH
1341PH/33 Sieve envelope tests were broken for match types other than :is. I have
1342 applied a patch sanctioned by the Sieve maintainer.
c688b954 1343
ebb6e6d5
PH
1344PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1345 the uid or gid is negative. A case of a negative gid caused this to be
1346 noticed. The fix allows for either to be negative.
1347
9c4e8f60
PH
1348PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1349 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1350 overlooked.
1351
1352PH/36 The change PH/12 above was broken. Fixed it.
1353
d7174846
PH
1354PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1355 the grounds that routing the same address twice would always produce the
1356 same answer. This might have been true once, but it is certainly no
1357 longer true now. Routing a child address may depend on the previous
1358 routing that produced that child. Some complicated redirection strategies
1359 went wrong when messages had multiple recipients, and made Exim's
1360 behaviour dependent on the order in which the addresses were given.
1361
1362 I have moved the duplicate checking until after the routing is complete.
1363 Exim scans the addresses that are assigned to local and remote
1364 transports, and removes any duplicates. This means that more work will be
1365 done, as duplicates will always all be routed, but duplicates are
1366 presumably rare, so I don't expect this is of any significance.
1367
1368 For deliveries to pipes, files, and autoreplies, the duplicate checking
1369 still happens during the routing process, since they are not going to be
1370 routed further.
1371
cfe75fc3
PH
1372PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1373 It corrects a timeout issue with spamd. This is Ian's comment: "The
1374 background is that sometimes spamd either never reads data from a
1375 connection it has accepted, or it never writes response data. The exiscan
1376 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1377 blindly assumes that writes won't block so it may never time out."
1378
be22d70e
PH
1379PH/39 Allow G after quota size as well as K and M.
1380
0612b098
PH
1381PH/40 The value set for $authenticated_id in an authenticator may not contain
1382 binary zeroes or newlines because the value is written to log lines and
1383 to spool files. There was no check on this. Now the value is run through
1384 the string_printing() function so that such characters are converted to
1385 printable escape sequences.
1386
2e0c1448
PH
1387PH/41 $message_linecount is a new variable that contains the total number of
1388 lines in the message. Compare $body_linecount, which is the count for the
1389 body only.
1390
447d236c
PH
1391PH/42 Exim no longer gives details of delivery errors for specific addresses in
1392 bounce and delay warning messages, except in certain special cases, which
1393 are as follows:
1394
1395 (a) An SMTP error message from a remote host;
1396 (b) A message specified in a :fail: redirection;
1397 (c) A message specified in a "fail" command in a system filter;
1398 (d) A message specified in a FAIL return from the queryprogram router;
1399 (e) A message specified by the cannot_route_message router option.
1400
1401 In these cases only, Exim does include the error details in bounce and
1402 warning messages. There are also a few cases where bland messages such
1403 as "unrouteable address" or "local delivery error" are given.
1404
d20976dc
PH
1405PH/43 $value is now also set for the "else" part of a ${run expansion.
1406
f656d135
PH
1407PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1408 being worked on, but at least Exim now implements the latest version to
1409 play with."
1410
2e2a30b4
PH
1411PH/45 In a pipe transport, although a timeout while waiting for the pipe
1412 process to complete was treated as a delivery failure, a timeout while
1413 writing the message to the pipe was logged, but erroneously treated as a
1414 successful delivery. Such timeouts include transport filter timeouts. For
1415 consistency with the overall process timeout, these timeouts are now
1416 treated as errors, giving rise to delivery failures by default. However,
1417 there is now a new Boolean option for the pipe transport called
1418 timeout_defer, which, if set TRUE, converts the failures into defers for
1419 both kinds of timeout. A transport filter timeout is now identified in
1420 the log output.
1421
9176e9f0
PH
1422PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1423 systems where "make" and "gmake" are different, calling "gmake" at top
1424 level broke things. I've arranged for the value of $(MAKE) to be passed
1425 from the Makefile to this script so that it can call the same version of
1426 "make".
1427
7982096b 1428
bbe902f0
PH
1429A note about Exim versions 4.44 and 4.50
1430----------------------------------------
1431
1432Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1433changes of various kinds. As a consequence, a big documentation update was
1434needed. This delayed the release for rather longer than seemed good, especially
1435in the light of a couple of (minor) security issues. Therefore, the changes
1436that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1437release. So 4.44 and 4.50 are in effect two different branches that both start
1438from 4.43.
1439
1440I have left the 4.50 change log unchanged; it contains all the changes since
14414.43. The change log for 4.44 is below; many of its items are identical to
1442those for 4.50. This seems to be the most sensible way to preserve the
1443historical information.
1444
1445
f7b63901 1446Exim version 4.50
495ae4b0
PH
1447-----------------
1448
5fe762f6
PH
1449 1. Minor wording change to the doc/README.SIEVE file.
1450
139059f6 1451 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1452 computation of the current number of files was incorrect.
495ae4b0 1453
7086e875
PH
1454 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1455 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1456 place.
1457
35af9f61
PH
1458 4. Give more explanation in the error message when the command for a transport
1459 filter fails to execute.
1460
b668c215
PH
1461 5. There are several places where Exim runs a non-Exim command in a
1462 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1463 was being done only for the command run by the queryprogram router. It is
1464 now done for all such subprocesses. The other cases are: ${run, transport
1465 filters, and the commands run by the lmtp and pipe transports.
1466
a494b1e1
PH
1467 6. Added CONFIGURE_GROUP build-time option.
1468
1469 7. Some older OS have a limit of 256 on the maximum number of file
1470 descriptors. Exim was using setrlimit() to set 1000 as a large value
1471 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1472 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1473
c5fcb476
PH
1474 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1475 was an oversight, and furthermore, ever since the addition of extra
1476 controls (e.g. 4.43/32), the checks on when to allow different forms of
1477 "control" were broken. There should now be diagnostics for all cases when a
1478 control that does not make sense is encountered.
1479
69358f02
PH
1480 9. Added the /retain_sender option to "control=submission".
1481
5be20824
PH
148210. $recipients is now available in the predata ACL (oversight).
1483
eb2c0248
PH
148411. Tidy the search cache before the fork to do a delivery from a message
1485 received from the command line. Otherwise the child will trigger a lookup
1486 failure and thereby defer the delivery if it tries to use (for example) a
1487 cached ldap connection that the parent has called unbind on.
1488
2a3eea10
PH
148912. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1490 of $address_data from the recipient verification was clobbered by the
1491 sender verification.
1492
149313. The value of address_data from a sender verification is now available in
1494 $sender_address_data in subsequent conditions in the ACL statement.
1495
23c7ff99
PH
149614. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1497
4deaf07d
PH
149815. Added a new option "connect=<time>" to callout options, to set a different
1499 connection timeout.
1500
926e1192
PH
150116. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1502 was its contents. (It was OK if the option was not defined at all.)
1503
650edc6f
PH
150417. A "Completed" log line is now written for messages that are removed from
1505 the spool by the -Mrm option.
1506
2c7db3f5
PH
150718. New variables $sender_verify_failure and $recipient_verify_failure contain
1508 information about exactly what failed.
1509
3d235903
PH
151019. Added -dd to debug only the daemon process.
1511
7c7ad977
PH
151220. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1513 handles timeouts, both on the server side and network timeouts. Renamed the
1514 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1515
981756db
PH
151621. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1517 It is now set to "smtps".
1518
d4eb88df
PH
151922. $host_address is now set to the target address during the checking of
1520 ignore_target_hosts.
1521
152223. When checking ignore_target_hosts for an ipliteral router, no host name was
1523 being passed; this would have caused $sender_host_name to have been used if
1524 matching the list had actually called for a host name (not very likely,
1525 since this list is usually IP addresses). A host name is now passed as
1526 "[x.x.x.x]".
1527
7d468ab8
PH
152824. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1529 code that specifies a non-restarting handler (typically sigaction() in
1530 modern systems) in an attempt to fix a rare and obscure crash bug.
1531
153225. Narrowed the window for a race in the daemon that could cause it to ignore
1533 SIGCHLD signals. This is not a major problem, because they are used only to
1534 wake it up if nothing else does.
1535
62c0818f
PH
153626. A malformed maildirsize file could cause Exim to calculate negative values
1537 for the mailbox size or file count. Odd effects could occur as a result.
1538 The maildirsize information is now recalculated if the size or filecount
1539 end up negative.
1540
26034054
PH
154127. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1542 support for a long time. Removed HAVE_SYS_VFS_H.
1543
af66f652
PH
154428. Installed the latest version of exipick from John Jetmore.
1545
90af77f4
PH
154629. In an address list, if the pattern was not a regular expression, an empty
1547 subject address (from a bounce message) matched only if the pattern was an
1548 empty string. Non-empty patterns were not even tested. This was the wrong
1549 because it is perfectly reasonable to use an empty address as part of a
1550 database query. An empty address is now tested by patterns that are
1551 lookups. However, all the other forms of pattern expect the subject to
1552 contain a local part and a domain, and therefore, for them, an empty
1553 address still always fails if the pattern is not itself empty.
1554
d8ef3577
PH
155530. Exim went into a mad DNS loop when attempting to do a callout where the
1556 host was specified on an smtp transport, and looking it up yielded more
1557 than one IP address.
1558
5cb8cbc6
PH
155931. Re-factored the code for checking spool and log partition space into a
1560 function that finds that data and another that does the check. The former
1561 is then used to implement four new variables: $spool_space, $log_space,
1562 $spool_inodes, and $log_inodes.
1563
14702f5b
PH
156432. The RFC2047 encoding function was originally intended for short strings
1565 such as real names; it was not keeping to the 75-character limit for
1566 encoded words that the RFC imposes. It now respects the limit, and
1567 generates multiple encoded words if necessary. To be on the safe side, I
1568 have increased the buffer size for the ${rfc2047: expansion operator from
1569 1024 to 2048 bytes.
1570
063b1e99
PH
157133. It is now permitted to omit both strings after an "if" condition; if the
1572 condition is true, the result is "true". As before, when the second string
1573 is omitted, a false condition yields an empty string. This makes it less
1574 cumbersome to write custom ACL and router conditions.
1575
652e1b65
PH
157634. Failure to deliver a bounce message always caused it to be frozen, even if
1577 there was an errors_to setting on the router. The errors_to setting is now
1578 respected.
1579
6f0c9a4f
PH
158035. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1581 canonical form (fully expanded) before being placed in
1582 $sender_host_address.
1583
33397d19
PH
158436. The table in the code that translates DNS record types into text (T_A to
1585 "A" for instance) was missing entries for NS and CNAME. It is just possible
1586 that this could have caused confusion if both these types were looked up
1587 for the same domain, because the text type is used as part of Exim's
1588 per-process caching. But the chance of anyone hitting this buglet seems
1589 very small.
1590
7bb56e1f
PH
159137. The dnsdb lookup has been extended in a number of ways.
1592
1593 (1) There is a new type, "zns", which walks up the domain tree until it
1594 finds some nameserver records. It should be used with care.
1595
ea3bc19b
PH
1596 (2) There is a new type, "mxh", which is like "mx" except that it returns
1597 just the host names, not the priorities.
1598
1599 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1600 looked up. The behaviour when one of the lookups defers can be
1601 controlled by a keyword.
7bb56e1f 1602
ea3bc19b 1603 (4) It is now possible to specify the separator character for use when
7bb56e1f 1604 multiple records are returned.
33397d19 1605
0bcb2a0e
PH
160638. The dnslists ACL condition has been extended: it is now possible to supply
1607 a list of IP addresses and/or domains to be looked up in a particular DNS
1608 domain.
1609
2ac0e484
PH
161039. Added log_selector=+queue_time_overall.
1611
4e1fde53
PH
161240. When running the queue in the test harness, wait just a tad after forking a
1613 delivery process, to get repeatability of debugging output.
1614
de365ded
PH
161541. Include certificate and key file names in error message when GnuTLS fails
1616 to set them up, because the GnuTLS error message doesn't include the name
1617 of the failing file when there is a problem reading it.
1618
f05da2e8
PH
161942. Allow both -bf and -bF in the same test run.
1620
d6453af2
PH
162143. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1622
f7b63901
PH
162344. The "Exiscan patch" is now merged into the mainline Exim source.
1624
162545. Sometimes the final signoff response after QUIT could fail to get
1626 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1627 < 0 before doing a fflush(). This bug looks as though it goes back to the
1628 introduction of TLS in release 3.20, but "sometimes" must have been rare
1629 because the tests only now provoked it.
1630
a444213a
PH
163146. Reset the locale to "C" after calling embedded Perl, in case it was changed
1632 (this can affect the format of dates).
1633
0ec020ea
PH
163447. exim_tidydb, when checking for the continued existence of a message for
1635 which it has found a message-specific retry record, was not finding
1636 messages that were in split spool directories. Consequently, it was
1637 deleting retry records that should have stayed in existence.
1638
b1206957
PH
163948. Steve fixed some bugs in eximstats.
1640
164149. The SPA authentication driver was not abandoning authentication and moving
1642 on to the next authenticator when an expansion was forced to fail,
1643 contradicting the general specification for all authenticators. Instead it
1644 was generating a temporary error. It now behaves as specified.
1645
26dd5a95
PH
164650. The default ordering of permitted cipher suites for GnuTLS was pessimal
1647 (the order specifies the preference for clients). The order is now AES256,
1648 AES128, 3DES, ARCFOUR128.
1649
343b2385
PH
165051. Small patch to Sieve code - explicitly set From: when generating an
1651 autoreply.
1652
1c5466b9
PH
165352. Exim crashed if a remote delivery caused a very long error message to be
1654 recorded - for instance if somebody sent an entire SpamAssassin report back
1655 as a large number of 550 error lines. This bug was coincidentally fixed by
1656 increasing the size of one of Exim's internal buffers (big_buffer) that
1657 happened as part of the Exiscan merge. However, to be on the safe side, I
1658 have made the code more robust (and fixed the comments that describe what
1659 is going on).
1660
55ee9ee3
PH
166153. Now that there can be additional text after "Completed" in log lines (if
1662 the queue_time_overall log selector is set), a one-byte patch to exigrep
1663 was needed to allow it to recognize "Completed" as not the last thing in
1664 the line.
1665
d38f8232
PH
166654. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1667 patch that reportedly fixes this has been added. I am not expert enough to
1668 create a test for it. This is what the patch creator wrote:
1669
1670 "I found a little strange behaviour of ldap code when working with
1671 Windows 2003 AD Domain, where users was placed in more than one
1672 Organization Units. When I tried to give exim partial DN, the exit code
1673 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1674 But simultaneously result of request was absolutely normal ldap result,
1675 so I produce this patch..."
1676
3295e65b
PH
1677 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1678 REFERENCE, so I have modified the code to exclude the patch when that macro
1679 is not defined.
1680
7102e136
PH
168155. Some experimental protocols are using DNS PTR records for new purposes. The
1682 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1683 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1684 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1685 CAN-2005-0021
7102e136 1686
3ca0ba97
PH
168756. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1688
c2bcbe20
PH
168957. Double the size of the debug message buffer (to 2048) so that more of very
1690 long debug lines gets shown.
1691
18ce445d
PH
169258. The exicyclog utility now does better if the number of log files to keep
1693 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1694
1f5b4c3d
PH
169559. Two changes related to the smtp_active_hostname option:
1696
1697 (1) $smtp_active_hostname is now available as a variable.
1698 (2) The default for smtp_banner uses $smtp_active_hostname instead
1699 of $primary_hostname.
1700
b975ba52
PH
170160. The host_aton() function is supposed to be passed a string that is known
1702 to be a valid IP address. However, in the case of IPv6 addresses, it was
1703 not checking this. This is a hostage to fortune. Exim now panics and dies
1704 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1705 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1706 components; fortuitously, this particular loophole had already been fixed
1707 by change 4.50/55 above.
1708
1709 If there are any other similar loopholes, the new check in host_aton()
1710 itself should stop them being exploited. The report I received stated that
1711 data on the command line could provoke the exploit when Exim was running as
1712 exim, but did not say which command line option was involved. All I could
1713 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1714 running as the user.
ea3a6f44 1715 CAN-2005-0021
85b87bc2
PH
1716
171761. There was a buffer overflow vulnerability in the SPA authentication code
1718 (which came originally from the Samba project). I have added a test to the
1719 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1720 CAN-2005-0022
b975ba52 1721
17ffcae7
PH
172262. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1723 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1724
d95f9fdb
PH
172563. The daemon start-up calls getloadavg() while still root for those OS that
1726 need the first call to be done as root, but it missed one case: when
1727 deliver_queue_load_max is set with deliver_drop_privilege. This is
1728 necessary for the benefit of the queue runner, because there is no re-exec
1729 when deliver_drop_privilege is set.
1730
86b8287f
PH
173164. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1732 This has been fixed.
1733
60dc5e56
PH
173465. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1735 was in use, was not putting the data itself into the right store pool;
1736 consequently, it could be overwritten for a subsequent message in the same
1737 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1738 the caching.)
1739
533244af
PH
174066. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1741
a5a28604
PH
174267. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1743 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1744 the function were treating the return as a boolean value, which happened to
1745 work because 0=false and not-0=true, but is not correct code.
1746
7e634d24
PH
174768. The host_aton() function was not handling scoped IPv6 addresses (those
1748 with, for example, "%eth0" on the end) correctly.
1749
3e11c26b
PH
175069. Fixed some compiler warnings in acl.c for the bitmaps specified with
1751 negated items (that is, ~something) in unsigned ints. Some compilers
1752 apparently mutter when there is no cast.
1753
6729cf78
PH
175470. If an address verification called from an ACL failed, and did not produce a
1755 user-specific message (i.e. there was only a "system" message), nothing was
1756 put in $acl_verify_message. In this situation, it now puts the system
1757 message there.
1758
00f00ca5
PH
175971. Change 4.23/11 added synchronization checking at the start of an SMTP
1760 session; change 4.31/43 added the unwanted input to the log line - except
1761 that it did not do this in the start of session case. It now does.
1762
c9bdd01c
PH
176372. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1764 This is wrong and can cause the other end to generate a synchronization
1765 error if it is another Exim or anything else that does the synchronization
1766 check. A QUIT command is no longer sent after a timeout.
1767
d43194df
PH
176873. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1769 during host lookups.
1770
fe5b5d0b
PH
177174. The defer_ok option of callout verification was not working if it was used
1772 when verifying addresses in header lines, that is, for this case:
1773
1774 verify = header_sender/callout=defer_ok
1775
76a2d7ba
PH
177675. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1777 those file descriptors could be used for SMTP connections. If anything
1778 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1779 could be sent to the SMTP client, causing chaos. The daemon now opens
1780 stdin, stdout, and stderr to /dev/null when it puts itself into the
1781 background.
1782
178376. Arrange for output from Perl's "warn" command to be written to Exim's main
1784 log by default. The user can override this with suitable Perl magic.
1785
04f7d5b9
PH
178677. The use of log_message on a "discard" ACL verb, which is supposed to add to
1787 the log message when discard triggers, was not working for the DATA ACL or
1788 for the non-SMTP ACL.
1789
bc60667e
PH
179078. Error message wording change in sieve.c.
1791
bb6e88ff
PH
179279. If smtp_accept_max_per_host was set, the number of connections could be
1793 restricted to fewer than expected, because the daemon was trying to set up
1794 a new connection before checking whether the processes handling previous
1795 connections had finished. The check for completed processes is now done
1796 earlier. On busy systems, this bug wouldn't be noticed because something
1797 else would have woken the daemon, and it would have reaped the completed
1798 process earlier.
1799
1e70f85b
PH
180080. If a message was submitted locally by a user whose login name contained one
1801 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1802 It caused a spool format error. I have fixed the spool reading code. A
1803 related problem was that the "from" clause in the Received: line became
1804 illegal because of the space(s). It is now covered by ${quote_local_part.
1805
180681. Included the latest eximstats from Steve (adds average sizes to HTML Top
1807 tables).
1808
4e01f9d6
PH
180982. Updated OS/Makefile-AIX as per message from Mike Meredith.
1810
1ee1cef2
PH
181183. Patch from Sieve maintainer to fix unterminated string problem in
1812 "vacation" handling.
1813
6e2b4ccc
PH
181484. Some minor changes to the Linux configuration files to help with other
1815 OS variants using glibc.
1816
8e669ac1
PH
181785. One more patch for Sieve to update vacation handling to latest spec.
1818
495ae4b0 1819
bbe902f0
PH
1820----------------------------------------------------
1821See the note above about the 4.44 and 4.50 releases.
1822----------------------------------------------------
1823
1824
1825Exim version 4.44
1826-----------------
1827
1828 1. Change 4.43/35 introduced a bug that caused file counts to be
1829 incorrectly computed when quota_filecount was set in an appendfile
1830 transport
1831
1832 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1833 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1834 place.
1835
1836 3. Give more explanation in the error message when the command for a transport
1837 filter fails to execute.
1838
1839 4. There are several places where Exim runs a non-Exim command in a
1840 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1841 was being done only for the command run by the queryprogram router. It is
1842 now done for all such subprocesses. The other cases are: ${run, transport
1843 filters, and the commands run by the lmtp and pipe transports.
1844
1845 5. Some older OS have a limit of 256 on the maximum number of file
1846 descriptors. Exim was using setrlimit() to set 1000 as a large value
1847 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1848 systems. I've change it so that if it can't get 1000, it tries for 256.
1849
1850 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1851 was an oversight, and furthermore, ever since the addition of extra
1852 controls (e.g. 4.43/32), the checks on when to allow different forms of
1853 "control" were broken. There should now be diagnostics for all cases when a
1854 control that does not make sense is encountered.
1855
1856 7. $recipients is now available in the predata ACL (oversight).
1857
1858 8. Tidy the search cache before the fork to do a delivery from a message
1859 received from the command line. Otherwise the child will trigger a lookup
1860 failure and thereby defer the delivery if it tries to use (for example) a
1861 cached ldap connection that the parent has called unbind on.
1862
1863 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1864 of $address_data from the recipient verification was clobbered by the
1865 sender verification.
1866
186710. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1868 was its contents. (It was OK if the option was not defined at all.)
1869
187011. A "Completed" log line is now written for messages that are removed from
1871 the spool by the -Mrm option.
1872
187312. $host_address is now set to the target address during the checking of
1874 ignore_target_hosts.
1875
187613. When checking ignore_target_hosts for an ipliteral router, no host name was
1877 being passed; this would have caused $sender_host_name to have been used if
1878 matching the list had actually called for a host name (not very likely,
1879 since this list is usually IP addresses). A host name is now passed as
1880 "[x.x.x.x]".
1881
188214. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1883 code that specifies a non-restarting handler (typically sigaction() in
1884 modern systems) in an attempt to fix a rare and obscure crash bug.
1885
188615. Narrowed the window for a race in the daemon that could cause it to ignore
1887 SIGCHLD signals. This is not a major problem, because they are used only to
1888 wake it up if nothing else does.
1889
189016. A malformed maildirsize file could cause Exim to calculate negative values
1891 for the mailbox size or file count. Odd effects could occur as a result.
1892 The maildirsize information is now recalculated if the size or filecount
1893 end up negative.
1894
189517. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1896 support for a long time. Removed HAVE_SYS_VFS_H.
1897
ea3a6f44 189818. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1899
190019. Allow an empty sender to be matched against a lookup in an address list.
1901 Previously the only cases considered were a regular expression, or an
1902 empty pattern.
1903
190420. Exim went into a mad DNS lookup loop when doing a callout where the
1905 host was specified on the transport, if the DNS lookup yielded more than
1906 one IP address.
1907
ea3a6f44
NM
190821. The RFC2047 encoding function was originally intended for short strings
1909 such as real names; it was not keeping to the 75-character limit for
1910 encoded words that the RFC imposes. It now respects the limit, and
1911 generates multiple encoded words if necessary. To be on the safe side, I
1912 have increased the buffer size for the ${rfc2047: expansion operator from
1913 1024 to 2048 bytes.
bbe902f0 1914
ea3a6f44
NM
191522. Failure to deliver a bounce message always caused it to be frozen, even if
1916 there was an errors_to setting on the router. The errors_to setting is now
1917 respected.
bbe902f0
PH
1918
191923. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1920 canonical form (fully expanded) before being placed in
1921 $sender_host_address.
1922
192324. Updated eximstats to version 1.33
1924
ea3a6f44
NM
192525. Include certificate and key file names in error message when GnuTLS fails
1926 to set them up, because the GnuTLS error message doesn't include the name
1927 of the failing file when there is a problem reading it.
bbe902f0
PH
1928
192926. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1930 As per change 25.
bbe902f0 1931
ea3a6f44
NM
193227. Reset the locale to "C" after calling embedded Perl, in case it was changed
1933 (this can affect the format of dates).
bbe902f0 1934
ea3a6f44
NM
193528. exim_tidydb, when checking for the continued existence of a message for
1936 which it has found a message-specific retry record, was not finding
1937 messages that were in split spool directories. Consequently, it was
1938 deleting retry records that should have stayed in existence.
bbe902f0
PH
1939
194029. eximstats updated to version 1.35
1941 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1942 1.35 - bugfix such that pie charts by volume are generated correctly
1943
ea3a6f44
NM
194430. The SPA authentication driver was not abandoning authentication and moving
1945 on to the next authenticator when an expansion was forced to fail,
1946 contradicting the general specification for all authenticators. Instead it
1947 was generating a temporary error. It now behaves as specified.
bbe902f0 1948
ea3a6f44
NM
194931. The default ordering of permitted cipher suites for GnuTLS was pessimal
1950 (the order specifies the preference for clients). The order is now AES256,
1951 AES128, 3DES, ARCFOUR128.
bbe902f0 1952
ea3a6f44
NM
195331. Small patch to Sieve code - explicitly set From: when generating an
1954 autoreply.
bbe902f0 1955
ea3a6f44
NM
195632. Exim crashed if a remote delivery caused a very long error message to be
1957 recorded - for instance if somebody sent an entire SpamAssassin report back
1958 as a large number of 550 error lines. This bug was coincidentally fixed by
1959 increasing the size of one of Exim's internal buffers (big_buffer) that
1960 happened as part of the Exiscan merge. However, to be on the safe side, I
1961 have made the code more robust (and fixed the comments that describe what
1962 is going on).
bbe902f0 1963
ea3a6f44
NM
196433. Some experimental protocols are using DNS PTR records for new purposes. The
1965 keys for these records are domain names, not reversed IP addresses. The
1966 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1967 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1968 CAN-2005-0021
1969
ea3a6f44
NM
197034. The host_aton() function is supposed to be passed a string that is known
1971 to be a valid IP address. However, in the case of IPv6 addresses, it was
1972 not checking this. This is a hostage to fortune. Exim now panics and dies
1973 if the condition is not met. A case was found where this could be provoked
1974 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1975 components; fortuitously, this particular loophole had already been fixed
1976 by change 4.50/55 or 4.44/33 above.
1977
1978 If there are any other similar loopholes, the new check in host_aton()
1979 itself should stop them being exploited. The report I received stated that
1980 data on the command line could provoke the exploit when Exim was running as
1981 exim, but did not say which command line option was involved. All I could
1982 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1983 running as the user.
bbe902f0
PH
1984 CAN-2005-0021
1985
ea3a6f44
NM
198635. There was a buffer overflow vulnerability in the SPA authentication code
1987 (which came originally from the Samba project). I have added a test to the
1988 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1989 CAN-2005-0022
1990
ea3a6f44
NM
199136. The daemon start-up calls getloadavg() while still root for those OS that
1992 need the first call to be done as root, but it missed one case: when
1993 deliver_queue_load_max is set with deliver_drop_privilege. This is
1994 necessary for the benefit of the queue runner, because there is no re-exec
1995 when deliver_drop_privilege is set.
bbe902f0 1996
ea3a6f44
NM
199737. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1998 was in use, was not putting the data itself into the right store pool;
1999 consequently, it could be overwritten for a subsequent message in the same
2000 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2001 the caching.)
bbe902f0 2002
ea3a6f44
NM
200338. Sometimes the final signoff response after QUIT could fail to get
2004 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2005 < 0 before doing a fflush(). This bug looks as though it goes back to the
2006 introduction of TLS in release 3.20, but "sometimes" must have been rare
2007 because the tests only now provoked it.
bbe902f0
PH
2008
2009
495ae4b0
PH
2010Exim version 4.43
2011-----------------
2012
2013 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2014 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2015 Now it returns an integer. A number of calls were still expecting a T/F
2016 return. Fortuitously, in all cases, the tests worked in OK situations,
2017 which is the norm. However, things would have gone wrong on any write
2018 failures on the smtp file descriptor. This function is used when sending
2019 messages over SMTP and also when doing verify callouts.
2020
2021 2. When Exim is called to do synchronous delivery of a locally submitted
2022 message (the -odf or -odi options), it no longer closes stderr before doing
2023 the delivery.
2024
2025 3. Implemented the mua_wrapper option.
2026
2027 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2028
2029 5. Implemented the functions header_remove(), header_testname(),
2030 header_add_at_position(), and receive_remove_recipient(), and exported them
2031 to local_scan().
2032
2033 6. If an ACL "warn" statement specified the addition of headers, Exim already
2034 inserted X-ACL-Warn: at the start if there was no header name. However, it
2035 was not making this test for the second and subsequent header lines if
2036 there were newlines in the string. This meant that an invalid header could
2037 be inserted if Exim was badly configured.
2038
2039 7. Allow an ACL "warn" statement to add header lines at the start or after all
2040 the Received: headers, as well as at the end.
2041
2042 8. Added the rcpt_4xx retry error code.
2043
2044 9. Added postmaster_mailfrom=xxx to callout verification option.
2045
204610. Added mailfrom=xxxx to the callout verification option, for verify=
2047 header_sender only.
2048
204911. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2050 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2051
205212. Inserted some casts to stop certain compilers warning when using pointer
2053 differences as field lengths or precisions in printf-type calls (mostly
2054 affecting debugging statements).
2055
205613. Added optional readline() support for -be (dynamically loaded).
2057
205814. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2059 same clock tick as a message's arrival, so that its received time was the
2060 same as the "first fail" time on the retry record, and that message
2061 remained on the queue past the ultimate address timeout, every queue runner
2062 would try a delivery (because it was past the ultimate address timeout) but
2063 after another failure, the ultimate address timeout, which should have then
2064 bounced the address, did not kick in. This was a "< instead of <=" error;
2065 in most cases the first failure would have been in the next clock tick
2066 after the received time, and all would be well.
2067
206815. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2069 being recognized when the domain list was tested by the match_domain
2070 condition in an expansion string.
2071
207216. Added the ${str2b64: operator.
2073
207417. Exim was always calling setrlimit() to set a large limit for the number of
2075 processes, without checking whether the existing limit was already
2076 adequate. (It did check for the limit on file descriptors.) Furthermore,
2077 errors from getrlimit() and setrlimit() were being ignored. Now they are
2078 logged to the main and panic logs, but Exim does carry on, to try to do its
2079 job under whatever limits there are.
2080
208118. Imported PCRE 5.0.
2082
208319. Trivial typo in log message " temporarily refused connection" (the leading
2084 space).
2085
208620. If the log selector return_path_on_delivery was set and an address was
2087 redirected to /dev/null, the delivery process crashed because it assumed
2088 that a return path would always be set for a "successful" delivery. In this
2089 case, the whole delivery is bypassed as an optimization, and therefore no
2090 return path is set.
2091
209221. Internal re-arrangement: the function for sending a challenge and reading
2093 a response while authentication was assuming a zero-terminated challenge
2094 string. It's now changed to take a pointer and a length, to allow for
2095 binary data in such strings.
2096
209722. Added the cyrus_sasl authenticator (code supplied by MBM).
2098
209923. Exim was not respecting finduser_retries when seeking the login of the
2100 uid under which it was called; it was always trying 10 times. (The default
2101 setting of finduser_retries is zero.) Also, it was sleeping after the final
2102 failure, which is pointless.
2103
210424. Implemented tls_on_connect_ports.
2105
210625. Implemented acl_smtp_predata.
2107
210826. If the domain in control=submission is set empty, Exim assumes that the
2109 authenticated id is a complete email address when it generates From: or
2110 Sender: header lines.
2111
211227. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2113 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2114 chown and chgrp in /bin and hostname in /usr/bin.
2115
211628. Exim was keeping the "process log" file open after each use, just as it
2117 does for the main log. This opens the possibility of it remaining open for
2118 long periods when the USR1 signal hits a daemon. Occasional processlog
2119 errors were reported, that could have been caused by this. Anyway, it seems
2120 much more sensible not to leave this file open at all, so that is what now
2121 happens.
2122
212329. The long-running daemon process does not normally write to the log once it
2124 has entered its main loop, and it closes the log before doing so. This is
2125 so that log files can straightforwardly be renamed and moved. However,
2126 there are a couple of unusual error situations where the daemon does write
2127 log entries, and I had neglected to close the log afterwards.
2128
212930. The text of an SMTP error response that was received during a remote
2130 delivery was being truncated at 512 bytes. This is too short for some of
2131 the long messages that one sometimes sees. I've increased the limit to
2132 1024.
2133
213431. It is now possible to make retry rules that apply only when a message has a
2135 specific sender, in particular, an empty sender.
2136
213732. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2138 it possible to be selective about when SMTP synchronization is enforced.
2139
214033. Added "control = caseful_local_part" and "control = "caselower_local_part".
2141
214232. Implemented hosts_connection_nolog.
2143
214433. Added an ACL for QUIT.
2145
214634. Setting "delay_warning=" to disable warnings was not working; it gave a
2147 syntax error.
2148
214935. Added mailbox_size and mailbox_filecount to appendfile.
2150
215136. Added control = no_multiline_responses to ACLs.
2152
215337. There was a bug in the logic of the code that waits for the clock to tick
2154 in the case where the clock went backwards by a substantial amount such
2155 that the microsecond fraction of "now" was more than the microsecond
2156 fraction of "then" (but the whole seconds number was less).
2157
215838. Added support for the libradius Radius client library this is found on
2159 FreeBSD (previously only the radiusclient library was supported).
2160
2161
2162Exim version 4.42
2163-----------------
2164
2165 1. When certain lookups returned multiple values in the form name=value, the
2166 quoting of the values was not always being done properly. Specifically:
2167 (a) If the value started with a double quote, but contained no whitespace,
2168 it was not quoted.
2169 (b) If the value contained whitespace other than a space character (i.e.
2170 tabs or newlines or carriage returns) it was not quoted.
2171 This fix has been applied to the mysql and pgsql lookups by writing a
2172 separate quoting function and calling it from the lookup code. The fix
2173 should probably also be applied to nisplus, ibase and oracle lookups, but
2174 since I cannot test any of those, I have not disturbed their existing code.
2175
2176 2. A hit in the callout cache for a specific address caused a log line with no
2177 reason for rejecting RCPT. Now it says "Previous (cached) callout
2178 verification failure".
2179
2180 3. There was an off-by-one bug in the queryprogram router. An over-long
2181 return line was truncated at 256 instead of 255 characters, thereby
2182 overflowing its buffer with the terminating zero. As well as fixing this, I
2183 have increased the buffer size to 1024 (and made a note to document this).
2184
2185 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2186 when Exim is waiting for an SMTP response from a remote server, Exim
2187 restarts its select() call on the socket, thereby resetting its timeout.
2188 This is not a problem when such interrupts are rare. Somebody set up a cron
2189 job to run exiwhat every 2 minutes, which is less than the normal select()
2190 timeout (5 or 10 minutes). This meant that the select() timeout never
2191 kicked in because it was always reset. I have fixed this by comparing the
2192 time when an interrupt arrives with the time at the start of the first call
2193 to select(). If more time than the timeout has elapsed, the interrupt is
2194 treated as a timeout.
2195
2196 5. Some internal re-factoring in preparation for the addition of Sieve
2197 extensions (by MH). In particular, the "personal" test is moved to a
2198 separate function, and given an option for scanning Cc: and Bcc: (which is
2199 not set for Exim filters).
2200
2201 6. When Exim created an email address using the login of the caller as the
2202 local part (e.g. when creating a From: or Sender: header line), it was not
2203 quoting the local part when it contained special characters such as @.
2204
2205 7. Installed new OpenBSD configuration files.
2206
2207 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2208 try to make them clearer.
2209
2210 9. Callout options, other than the timeout value, were being ignored when
2211 verifying sender addresses in header lines. For example, when using
2212
2213 verify = header_sender/callout=no_cache
2214
2215 the cache was (incorrectly) being used.
2216
221710. Added a missing instance of ${EXE} to the exim_install script; this affects
2218 only the Cygwin environment.
2219
222011. When return_path_on_delivery was set as a log selector, if different remote
2221 addresses in the same message used different return paths and parallel
2222 remote delivery occurred, the wrong values would sometimes be logged.
2223 (Whenever a remote delivery process finished, the return path value from
2224 the most recently started remote delivery process was logged.)
2225
222612. RFC 3848 specifies standard names for the "with" phrase in Received: header
2227 lines when AUTH and/or TLS are in use. This is the "received protocol"
2228 field. Exim used to use "asmtp" for authenticated SMTP, without any
2229 indication (in the protocol name) for TLS use. Now it follows the RFC and
2230 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2231 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2232 names appear in log lines as well as in Received: header lines.
2233
223413. Installed MH's patches for Sieve to add the "copy" and "vacation"
2235 extensions, and comparison tests, and to fix some bugs.
2236
223714. Changes to the "personal" filter test:
2238
2239 (1) The test was buggy in that it was just doing the equivalent of
2240 "contains" tests on header lines. For example, if a user's address was
2241 anne@some.where, the "personal" test would incorrectly be true for
2242
2243 To: susanne@some.where
2244
2245 This test is now done by extracting each address from the header in turn,
2246 and checking the entire address. Other tests that are part of "personal"
2247 are now done using regular expressions (for example, to check local parts
2248 of addresses in From: header lines).
2249
2250 (2) The list of non-personal local parts in From: addresses has been
2251 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2252 taken from the Sieve specification recommendations.
2253
2254 (3) If the message contains any header line starting with "List-" it is
2255 treated as non-personal.
2256
2257 (4) The test for "circular" in the Subject: header line has been removed
2258 because it now seems ill-conceived.
2259
226015. Minor typos in src/EDITME comments corrected.
2261
226216. Installed latest exipick from John Jetmore.
2263
226417. If headers_add on a router specified a text string that was too long for
2265 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2266 of string_sprintf() is now avoided.
2267
226818. $message_body_size was not set (it was always zero) when running the DATA
2269 ACL and the local_scan() function.
2270
227119. For the "mail" command in an Exim filter, no default was being set for
2272 the once_repeat time, causing a random time value to be used if "once" was
2273 specified. (If the value happened to be <= 0, no repeat happened.) The
2274 default is now 0s, meaning "never repeat". The "vacation" command was OK
2275 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2276 (I found it when inspecting the code).
2277
227820. There is now an overall timeout for performing a callout verification. It
2279 defaults to 4 times the callout timeout, which applies to individual SMTP
2280 commands during the callout. The overall timeout applies when there is more
2281 than one host that can be tried. The timeout is checked before trying the
2282 next host. This prevents very long delays if there are a large number of
2283 hosts and all are timing out (e.g. when the network connections are timing
2284 out). The value of the overall timeout can be changed by specifying an
2285 additional sub-option for "callout", called "maxwait". For example:
2286
2287 verify = sender/callout=5s,maxwait=20s
2288
228921. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2290 to the end before writing, but this should make it even safer).
2291
229222. Exim was forgetting that it had advertised PIPELINING for the second and
2293 subsequent messages on an SMTP connection. It was also not resetting its
2294 memory on STARTTLS and an internal HELO.
2295
229623. When Exim logs an SMTP synchronization error within a session, it now
2297 records whether PIPELINING has been advertised or not.
2298
229924. Added 3 instances of "(long int)" casts to time_t variables that were being
2300 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2301 rather than long int.
2302
230325. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2304
230526. Added the never_mail option to autoreply.
2306
2307
2308Exim version 4.41
2309-----------------
2310
2311 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2312 crash if the getsockname() call failed; this can happen if a connection is
2313 closed very soon after it is established. The problem was simply in the
2314 order in which certain operations were done, causing Exim to try to write
2315 to the SMTP stream before it had set up the file descriptor. The bug has
2316 been fixed by making things happen in the correct order.
2317
2318
2319Exim version 4.40
2320-----------------
2321
2322 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2323 before the connection was closed, thus losing the rejection response.
2324
2325 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2326 some early Solaris releases, but causes trouble in current releases where
2327 socklen_t is defined.
2328
2329 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2330 always exist.
2331
2332 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2333 configured.
2334
2335 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2336 that releasing the top of it at the end releases what was used for sub-
2337 expansions (unless the block got too big). However, discard this block if
2338 the first thing is a variable or header, so that we can use its block when
2339 it is dynamic (useful for very large $message_headers, for example).
2340
2341 6. Lookups now cache *every* query, not just the most recent. A new, separate
2342 store pool is used for this. It can be recovered when all lookup caches are
2343 flushed. Lookups now release memory at the end of their result strings.
2344 This has involved some general refactoring of the lookup sources.
2345
2346 7. Some code has been added to the store_xxx() functions to reduce the amount
2347 of flapping under certain conditions.
2348
2349 8. log_incoming_interface used to affect only the <= reception log lines. Now
2350 it causes the local interface and port to be added to several more SMTP log
2351 lines, for example "SMTP connection from", and rejection lines.
2352
2353 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2354
235510. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2356
235711. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2358 could be overwritten at the end of the current message (or the start of a
2359 new message if it was set in a HELO ACL). The value is now preserved for
2360 the duration of the SMTP connection.
2361
236212. If a transport had a headers_rewrite setting, and a matching header line
2363 contained an unqualified address, that address was qualified, even if it
2364 did not match any rewriting rules. The underlying bug was that the values
2365 of the flags that permit the existence of unqualified sender and recipient
2366 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2367 non-local messages, and by -bnq for local messages) were not being
2368 preserved with the message after it was received.
2369
237013. When Exim was logging an SMTP synchronization error, it could sometimes log
2371 "next input=" as part of the text comprising the host identity instead of
2372 the correct text. The code was using the same buffer for two different
2373 strings. However, depending on which order the printing function evaluated
2374 its arguments, the bug did not always show up. Under Linux, for example, my
2375 test suite worked just fine.
2376
237714. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2378 doesn't work with some older versions of Perl. It has been changed to "my",
2379 which in any case is probably the better facility to use.
2380
238115. A really picky compiler found some instances of statements for creating
2382 error messages that either had too many or two few arguments for the format
2383 string.
2384
238516. The size of the buffer for calls to the DNS resolver has been increased
2386 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2387 for addresses that have a lot of PTR records. This alleviates a problem; it
2388 does not fully solve it.
2389
239017. A dnsdb lookup for PTR records that receives more data than will fit in the
2391 buffer now truncates the list and logs the incident, which is the same
2392 action as happens when Exim is looking up a host name and its aliases.
2393 Previously in this situation something unpredictable would happen;
2394 sometimes it was "internal error: store_reset failed".
2395
239618. If a server dropped the connection unexpectedly when an Exim client was
2397 using GnuTLS and trying to read a response, the client delivery process
2398 crashed while trying to generate an error log message.
2399
240019. If a "warn" verb in an ACL added multiple headers to a message in a single
2401 string, for example:
2402
2403 warn message = H1: something\nH2: something
2404
2405 the text was added as a single header line from Exim's point of view
2406 though it ended up OK in the delivered message. However, searching for the
2407 second and subsequent header lines using $h_h2: did not work. This has been
2408 fixed. Similarly, if a system filter added multiple headers in this way,
2409 the routers could not see them.
2410
241120. Expanded the error message when iplsearch is called with an invalid key to
2412 suggest using net-iplsearch in a host list.
2413
241421. When running tests using -bh, any delays imposed by "delay" modifiers in
2415 ACLs are no longer actually imposed (and a message to that effect is
2416 output).
2417
241822. If a "gecos" field in a passwd entry contained escaped characters, in
2419 particular, if it contained a \" sequence, Exim got it wrong when building
2420 a From: or a Sender: header from that name. A second bug also caused
2421 incorrect handling when an unquoted " was present following a character
2422 that needed quoting.
2423
242423. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2425 was not being matched caselessly.
2426
242724. Arranged for all hyphens in the exim.8 source to be escaped with
2428 backslashes.
2429
243025. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2431 properly. Recipient callout cache records were still being keyed to include
2432 the sender, even when use_sender was set false. This led to far more
2433 callouts that were necessary. The sender is no longer included in the key
2434 when use_sender is false.
2435
243626. Added "control = submission" modifier to ACLs.
2437
243827. Added the ${base62d: operator to decode base 62 numbers.
2439
244028. dnsdb lookups can now access SRV records.
2441
244229. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2443 the configuration file.
2444
244530. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2446 (-v) mode. This makes the output for a verbose queue run more intelligible.
2447
244831. Added a use_postmaster feature to recipient callouts.
2449
245032. Added the $body_zerocount variable, containing the number of binary zero
2451 bytes in the message body.
2452
245333. The time of last modification of the "new" subdirectory is now used as the
2454 "mailbox time last read" when there is a quota error for a maildir
2455 delivery.
2456
245734. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2458
245935. Added +ignore_unknown as a special item in host lists.
2460
246136. Code for decoding IPv6 addresses in host lists is now included, even if
2462 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2463 address was recognized as an IP address, but was then not correctly decoded
2464 into binary, causing unexpected and incorrect effects when compared with
2465 another IP address.
2466
2467
2468Exim version 4.34
2469-----------------
2470
2471 1. Very minor rewording of debugging text in manualroute to say "list of
2472 hosts" instead of "hostlist".
2473
2474 2. If verify=header_syntax was set, and a header line with an unqualified
2475 address (no domain) and a large number of spaces between the end of the
2476 name and the colon was received, the reception process suffered a buffer
2477 overflow, and (when I tested it) crashed. This was caused by some obsolete
2478 code that should have been removed. The fix is to remove it!
2479
2480 3. When running in the test harness, delay a bit after writing a bounce
2481 message to get a bit more predictability in the log output.
2482
2483 4. Added a call to search_tidyup() just before forking a reception process. In
2484 theory, someone could use a lookup in the expansion of smtp_accept_max_
2485 per_host which, without the tidyup, could leave open a database connection.
2486
2487 5. Added the variables $recipient_data and $sender_data which get set from a
2488 lookup success in an ACL "recipients" or "senders" condition, or a router
2489 "senders" option, similar to $domain_data and $local_part_data.
2490
2491 6. Moved the writing of debug_print from before to after the "senders" test
2492 for routers.
2493
2494 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2495 problems for message scanning, either using a data ACL, or using
2496 local_scan() because the Received: header was not generated till after they
2497 were called (in order to set the time as the time of reception completion).
2498 I have revised the way this works. The header is now generated after the
2499 body is received, but before the ACL or local_scan() are called. After they
2500 are run, the timestamp in the header is updated.
2501
2502
2503Exim version 4.33
2504-----------------
2505
2506 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2507 before starting a queue runner without re-exec. This happened only when
2508 deliver_drop_privilege was set or when the Exim user was set to root. The
2509 effect of the bug was that timeouts during subsequent deliveries caused
2510 crashes instead of being properly handled. The handler is now left at its
2511 default (and expected) setting.
2512
2513 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2514 message, again when deliver_drop_privilege is set or Exim is run as root.
2515 The bug described in (1) was not present in this case, but the tidying up
2516 of the other signals was missing. I have made the two cases consistent.
2517
2518 3. The ignore_target_hosts setting on a manualroute router was being ignored
2519 for hosts that were looked up using the /MX notation.
2520
2521 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2522 in domain lists.
2523
2524 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2525 operated on the sender address. After changing the $sender_address to <>
2526 for the sender address verify, Exim was re-instated it as the original
2527 (before rewriting) address, but remembering that it had rewritten it, so it
2528 wasn't rewriting it again. This bug also had the effect of breaking the
2529 sender address verification caching when the sender address was rewritten.
2530
2531 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2532 This has been changed so that if the ip literal address matches
2533 ignore_target_hosts, the router declines.
2534
2535 7. Added expansion conditions match_domain, match_address, and match_local_
2536 part (NOT match_host).
2537
2538 8. The placeholder for the Received: header didn't have a length field set.
2539
2540 9. Added code to Exim itself and to exim_lock to test for a specific race
2541 condition that could lead to file corruption when using MBX delivery. The
2542 issue is with the lockfile that is created in /tmp. If this file is removed
2543 after a process has opened it but before that process has acquired a lock,
2544 there is the potential for a second process to recreate the file and also
2545 acquire a lock. This could lead to two Exim processes writing to the file
2546 at the same time. The added code performs the same test as UW imapd; it
2547 checks after acquiring the lock that its file descriptor still refers to
2548 the same named file.
2549
255010. The buffer for building added header lines was of fixed size, 8192 bytes.
2551 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2552 when Exim is built.
2553
255411. Added the smtp_active_hostname option. If used, this will typically be made
2555 to depend on the incoming interface address. Because $interface_address is
2556 not set up until the daemon has forked a reception process, error responses
2557 that can happen earlier (such as "too many connections") no longer contain
2558 a host name.
2559
256012. If an expansion in a condition on a "warn" statement fails because a lookup
2561 defers, the "warn" statement is abandoned, and the next ACL statement is
2562 processed. Previously this caused the whole ACL to be aborted.
2563
256413. Added the iplsearch lookup type.
2565
256614. Added ident_timeout as a log selector.
2567
256815. Added tls_certificate_verified as a log selector.
2569
257016. Added a global option tls_require_ciphers (compare the smtp transport
2571 option of the same name). This controls incoming TLS connections.
2572
257317. I finally figured out how to make tls_require_ciphers do a similar thing
2574 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2575 before starting the TLS session.
2576
257718. Tabs are now shown as \t in -bP output.
2578
257919. If the log selector return_path_on_delivery was set, Exim crashed when
2580 bouncing a message because it had too many Received: header lines.
2581
258220. If two routers both had headers_remove settings, and the first one included
2583 a superfluous trailing colon, the final name in the first list and the
2584 first name in the second list were incorrectly joined into one item (with a
2585 colon in the middle).
2586
2587
2588Exim version 4.32
2589-----------------
2590
2591 1. Added -C and -D options to the exinext utility, mainly to make it easier
2592 to include in the automated testing, but these could be helpful when
2593 multiple configurations are in use.
2594
2595 2. The exinext utility was not formatting the output nicely when there was
2596 an alternate port involved in the retry record key, nor when there was a
2597 message id as well (for retries that were specific to a specific message
2598 and a specific host). It was also confused by IPv6 addresses, because of
2599 the additional colons they contain. I have fixed the IPv4 problem, and
2600 patched it up to do a reasonable job for IPv6.
2601
2602 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2603 delivery, the log line now contains "pipelined" if PIPELINING was used.
2604
2605 4. An SMTP transport process used to panic and die if the bind() call to set
2606 an explicit outgoing interface failed. This has been changed; it is now
2607 treated in the same way as a connect() failure.
2608
2609 5. A reference to $sender_host_name in the part of a conditional expansion
2610 that was being skipped was still causing a DNS lookup. This no longer
2611 occurs.
2612
2613 6. The def: expansion condition was not recognizing references to header lines
2614 that used bh_ and bheader_.
2615
2616 7. Added the _cache feature to named lists.
2617
2618 8. The code for checking quota_filecount in the appendfile transport was
2619 allowing one more file than it should have been.
2620
2621 9. For compatibility with Sendmail, the command line option
2622
2623 -prval:sval
2624
2625 is equivalent to
2626
2627 -oMr rval -oMs sval
2628
2629 and sets the incoming protocol and host name (for trusted callers). The
2630 host name and its colon can be omitted when only the protocol is to be set.
2631 Note the Exim already has two private options, -pd and -ps, that refer to
2632 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2633 "s", but I don't think that's a major issue.
2634
263510. A number of refactoring changes to the code, none of which should affect
2636 Exim's behaviour:
2637
2638 (a) The number of logging options was getting close to filling up the
2639 32-bit word that was used as a bit map. I have split them into two classes:
2640 those that are passed in the argument to log_write(), and those that are
2641 only ever tested independently outside of that function. These are now in
2642 separate 32-bit words, so there is plenty of room for expansion again.
2643 There is no change in the user interface or the logging behaviour.
2644
2645 (b) When building, for example, log lines, the code previously used a
2646 macro that called string_cat() twice, in order to add two strings. This is
2647 not really sufficiently general. Furthermore, there was one instance where
2648 it was actually wrong because one of the argument was used twice, and in
2649 one call a function was used. (As it happened, calling the function twice
2650 did not affect the overall behaviour.) The macro has been replaced by a
2651 function that can join an arbitrary number of extra strings onto a growing
2652 string.
2653
2654 (c) The code for expansion conditions now uses a table and a binary chop
2655 instead of a serial search (which was left over from when there were very
2656 few conditions). Also, it now recognizes conditions like "pam" even when
2657 the relevant support is not compiled in: a suitably worded error message is
2658 given if an attempt is made to use such a condition.
2659
266011. Added ${time_interval:xxxxx}.
2661
266212. A bug was causing one of the ddress fields not to be passed back correctly
2663 from remote delivery subprocesses. The field in question was not being
2664 subsequently used, so this caused to problems in practice.
2665
266613. Added new log selectors queue_time and deliver_time.
2667
266814. Might have fixed a bug in maildirsizefile handling that threw up
2669 "unexpected character" debug warnings, and recalculated the data
2670 unnecessarily. In any case, I expanded the warning message to give more
2671 information.
2672
267315. Added the message "Restricted characters in address" to the statements in
2674 the default ACL that block characters like @ and % in local parts.
2675
267616. Change 71 for release 4.31 proved to be much less benign that I imagined.
2677 Three changes have been made:
2678
2679 (a) There was a serious bug; a negative response to MAIL caused the whole
2680 recipient domain to be cached as invalid, thereby blocking all messages
2681 to all local parts at the same domain, from all senders. This bug has
2682 been fixed. The domain is no longer cached after a negative response to
2683 MAIL if the sender used is not empty.
2684
2685 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2686 been restored.
2687
2688 (c) A new callout option, "use_sender" has been added for people who want
2689 the modified behaviour.
2690
2691
2692Exim version 4.31
2693-----------------
2694
2695 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2696 Larry Rosenman.
2697
2698 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2699 indeed breaks things for older releases.
2700
2701 3. Added additional logging to the case where there is a problem reading data
2702 from a filter that is running in a subprocess using a pipe, in order to
2703 try to track down a specific problem.
2704
2705 4. Testing facility fudge: when running in the test harness and attempting
2706 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2707 getting "No route to host". Convert this to a timeout.
2708
2709 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2710 warning.
2711
2712 6. Some OS don't have socklen_t but use size_t instead. This affects the
2713 fifth argument of getsockopt() amongst other things. This is now
2714 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2715 can be set for individual OS. I have set it for SunOS5, OSF1, and
2716 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2717 some earlier ones do not.
2718
2719 7. Change 4.30/15 was not doing the test caselessly.
2720
2721 8. The standard form for an IPv6 address literal was being rejected by address
2722 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2723 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2724 this, as well as the form without the "IPv6" on the front (but only when
2725 address literals are enabled, of course).
2726
2727 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2728
272910. Exim crashed if a message with an empty sender address specified by -f
2730 encountered a router with an errors_to setting. This could be provoked only
2731 by a command such as
2732
2733 exim -f "" ...
2734
2735 where an empty string was supplied; "<>" did not hit this bug.
2736
273711. Installed PCRE release 4.5.
2738
273912. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2740 remained set. It is now erased.
2741
274213. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2743 times from message ids (which are base 36 rather than the normal 62).
2744
274514. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2746 were being counted as actual protocol errors, and logged if the log
2747 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2748 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2749 and DATA following a set of rejected RCPTs do not count as protocol errors.
2750 In other words, Exim assumes they were pipelined, though this may not
2751 actually be the case. Of course, in all cases the client gets an
2752 appropriate error code.
2753
275415. If a lookup fails in an ACL condition, a message about the failure may
2755 be available; it is used if testing the ACL cannot continue, because most
2756 such messages specify what the cause of the deferral is. However, some
2757 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2758 that caused an old message to be retained and used if a later statement
2759 caused a defer, replacing the real cause of the deferral.
2760
276116. If an IP address had so many PTR records that the DNS lookup buffer
2762 was not large enough to hold them, Exim could crash while trying to process
2763 the truncated data. It now detects and logs this case.
2764
276517. Further to 4.21/58, another change has been made: if (and only if) the
2766 first line of a message (the first header line) ends with CRLF, a bare LF
2767 in a subsequent header line has a space inserted after it, so as not to
2768 terminate the header.
2769
277018. Refactoring: tidied an ugly bit of code in appendfile that copied data
2771 unnecessarily, used atoi() instead of strtol(), and didn't check the
2772 termination when getting file sizes from file names by regex.
2773
277419. Completely re-implemented the support for maildirsize files, in the light
2775 of a number of problems with the previous contributed implementation
2776 (4.30/29). In particular:
2777
2778 . If the quota is zero, the maildirsize file is maintained, but no quota is
2779 imposed.
2780
2781 . If the maildir directory does not exist, it is created before any attempt
2782 to write a maildirsize file.
2783
2784 . The quota value in the file is just a cache; if the quota is changed in
2785 the transport, the new value overrides.
2786
2787 . A regular expression is available for excluding directories from the
2788 count.
2789
279020. The autoreply transport checks the characters in options that define the
2791 message's headers; it allows continued headers, but it was checking with
2792 isspace() after an embedded newline instead of explicitly looking for a
2793 space or a tab.
2794
279521. If all the "regular" hosts to which an address was routed had passed their
2796 expiry times, and had not reached their retry times, the address was
2797 bounced, even if fallback hosts were defined. Now Exim should go on to try
2798 the fallback hosts.
2799
280022. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2801 equivalent code in the SMTP transport. Some hosts send humungous responses
2802 to HELO/EHLO, more than 1024 it seems.
2803
280423. Refactoring: code in filter.c used (void *) for "any old type" but this
2805 gives compiler warnings in some environments. I've now done it "properly",
2806 using a union.
2807
280824. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2809 (because of problems with the built-in one) was declared to return uschar *
2810 instead of char *, causing compiler failure.
2811
281225. Fixed a file descriptor leak when processing alias/forward files.
2813
281426. Fixed a minor format string issue in dbfn.c.
2815
281627. Typo in exim.c: ("dmbnz" for "dbmnz").
2817
281828. If a filter file refered to $h_xxx or $message_headers, and the headers
2819 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2820 become corrupted.
2821
282229. When a sender address is verified, it is cached, to save repeating the test
2823 when there is more than one recipient in a message. However, when the
2824 verification involves a callout, it is possible for different callout
2825 options to be set for different recipients. It is too complicated to keep
2826 track of this in the cache, so now Exim always runs a verification when a
2827 callout is required, relying on the callout cache for the optimization.
2828 The overhead is duplication of the address routing, but this should not be
2829 too great.
2830
283130. Fixed a bug in callout caching. If a RCPT command caused the sender address
2832 to be verified with callout=postmaster, and the main callout worked but the
2833 postmaster check failed, the verification correctly failed. However, if a
2834 subsequent RCPT command asked for sender verification *without* the
2835 postmaster check, incorrect caching caused this verification also to fail,
2836 incorrectly.
2837
283831. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2839 it was not caching the DNS options (qualify_single, search_parents) that
2840 were used when the lookup failed. A subsequent lookup with different
2841 options therefore always gave the same answer, though there were cases
2842 where it should not have. (Example: a "domains = !$mx_any" option on a
2843 dnslookup router: the "domains" option is always processed without any
2844 widening, but the router might have qualify_single set.) Now Exim uses the
2845 cached value only when the same options are set.
2846
284732. Added John Jetmore's "exipick" utility to the distribution.
2848
284933. GnuTLS: When an attempt to start a TLS session fails for any reason other
2850 than a timeout (e.g. a certificate is required, and is not provided), an
2851 Exim server now closes the connection immediately. Previously it waited for
2852 the client to close - but if the client is SSL, it seems that they each
2853 wait for each other, leading to a delay before one of them times out.
2854
285534: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2856 maintained 0.8.x compatibility because I don't think many are using it, and
2857 it is clearly obsolete.
2858
285935. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2860 transport.
2861
286236. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2863 client certificate was expired. A simple patch fixes this, though I don't
2864 understand the full logic of why the verify callback is called multiple
2865 times.
2866
286737. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2868 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2869 which causes problems with some clients (such as the Certicom SSL Plus
2870 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2871 disables the coutermeasure allowing Eudora to connect."
2872
287338. Exim was not checking that a write() to a log file succeeded. This could
2874 lead to Bad Things if a log got too big, in particular if it hit a file
2875 size limit. Exim now panics and dies if it cannot write to a log file, just
2876 as it does if it cannot open a log file.
2877
287839. Modified OS/Makefile-Linux so that it now contains
2879
2880 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2881
2882 The two -D definitions ensure that Exim is compiled with large file
2883 support, which makes it possible to handle log files that are bigger than
2884 2^31.
2885
288640. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2887 instance) a domain was checked against a named list that involved a lookup,
2888 causing $domain_data to be set, then another domain was checked against the
2889 same list, then the first domain was re-checked, the value of $domain_data
2890 after the final check could be wrong. In particular, if the second check
2891 failed, it could be set empty. This bug probably also applied to
2892 $localpart_data.
2893
289441. The strip_trailing_dot option was not being applied to the address given
2895 with the -f command-line option.
2896
289742. The code for reading a message's header from the spool was incrementing
2898 $received_count, but never initializing it. This meant that the value was
2899 incorrect (doubled) while delivering a message in the same process in which
2900 it was received. In the most common configuration of Exim, this never
2901 happens - a fresh exec is done - but it can happen when
2902 deliver_drop_privilege is set.
2903
290443. When Exim logs an SMTP synchronization error - client data sent too soon -
2905 it now includes up to 150 characters of the unexpected data in the log
2906 line.
2907
290844. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2909 and building data strings. The size of both of these buffers was 10 000
2910 bytes - far larger than anybody would *ever* want, thought I. Needless to
2911 say, somebody hit the limit. I have increased the maximum line length to
2912 20 000 and the maximum data length of concatenated lines to 100 000. I have
2913 also fixed two bugs, because there was no checking on these buffers. Tsk,
2914 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2915 buffer is too small.
2916
291745. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2918 lsearch lookups. Now it does.
2919
292046. When parsing a route_list item in a manualroute router, a fixed-length
2921 buffer was used for the list of hosts. I made this 1024 bytes long,
2922 thinking that nobody would ever have a list of hosts that long. Wrong.
2923 Somebody had a whole pile of complicated expansion conditions, and the
2924 string was silently truncated, leading to an expansion error. It turns out
2925 that it is easier to change to an unlimited length (owing to other changes
2926 that have happened since this code was originally written) than to build
2927 structure for giving a limitation error. The length of the item that
2928 expands into the list of hosts is now unlimited.
2929
293047. The lsearch lookup could not handle data where the length of text line was
2931 more than 4095 characters. Such lines were truncated, leading to shortened
2932 data being returned. It should now handle lines of any length.
2933
293448. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2935 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2936 ACL").
2937
293849. Cosmetic tidy to scripts like exicyclog that are generated by globally
2939 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2940 no longer happens in comment lines. A list of replacements is now placed
2941 at the head of all of the source files, except those whose only change is
2942 to replace PERL_COMMAND in the very first #! line.
2943
294450. Replaced the slow insertion sort in queue.c, for sorting the list of
2945 messages on the queue, with a bottom-up merge sort, using code contributed
2946 by Michael Haardt. This should make operations like -bp somewhat faster on
2947 large queues. It won't affect queue runners, except when queue_run_in_order
2948 is set.
2949
295051. Installed eximstats 1.31 in the distribution.
2951
295252. Added support for SRV lookups to the dnslookup router.
2953
295453. If an ACL referred to $message_body or $message_body_end, the value was not
2955 reset for any messages that followed in the same SMTP session.
2956
295754. The store-handling optimization for building very long strings was not
2958 differentiating between the different store pools. I don't think this
2959 actually made any difference in practice, but I've tidied it.
2960
296155. While running the routers to verify a sender address, $sender_address
2962 was still set to the sender address. This is wrong, because when routing to
2963 send a bounce to the sender, it would be empty. Therefore, I have changed
2964 it so that, while verifying a sender address, $sender_address is set to <>.
2965 (There is no change to what happens when verifying a recipient address.)
2966
296756. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2968 target A or AAAA records (if not already returned) without resetting the
2969 qualify_single or search_parents options of the DNS resolver. These are
2970 inappropriate in this case because the targets of MX and SRV records must
2971 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2972 target that, when qualified, matched something in the local domain. These
2973 two options are now turned off when doing these lookups.
2974
297557. It seems that at least some releases of Reiserfs (which does not have the
2976 concept of a fixed number of inodes) returns zero and not -1 for the
2977 number of available inodes. This interacted badly with check_spool_inodes,
2978 which assumed that -1 was the "no such thing" setting. What I have done is
2979 to check that the total number of inodes is greater than zero before doing
2980 the test of how many are available.
2981
298258. When a "warn" ACL statement has a log_message modifier, the message is
2983 remembered, and not repeated. This is to avoid a lot of repetition when a
2984 message has many recipients that cause the same warning to be written.
2985 Howewer, Exim was preserving the list of already written lines for an
2986 entire SMTP session, which doesn't seem right. The memory is now reset if a
2987 new message is started.
2988
298959. The "rewrite" debugging flag was not showing the result of rewriting in the
2990 debugging output unless log_rewrite was also set.
2991
299260. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2993 of (int)(handle) when we know that handle contains (void *)(-1).
2994
299561. The Exim daemon panic-logs an error return when it closes the incoming
2996 connection. However "connection reset by peer" seems to be common, and
2997 isn't really an error worthy of noting specially, so that particular error
2998 is no long logged.
2999
300062. When Exim is trying to find all the local interfaces, it used to panic and
3001 die if the ioctl to get the interface flags failed. However, it seems that
3002 on at least one OS (Solaris 9) it is possible to have an interface that is
3003 included in the list of interfaces, but for which you get a failure error
3004 for this call. This happens when the interface is not "plumbed" into a
3005 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3006 failure of the "get flags" call assumes that the interface is down.
3007
300863. Added a ${eval10: operator, which assumes all numbers are decimal. This
3009 makes life easier for people who are doing arithmetic on fields extracted
3010 from dates, where you often get leading zeros that should not be
3011 interpreted as octal.
3012
301364. Added qualify_domain to the redirect router, to override the global
3014 setting.
3015
301665. If a pathologically long header line contained very many addresses (the
3017 report of this problem mentioned 10 000) and each of them was rewritten,
3018 Exim could use up a very large amount of memory. (It kept on making new
3019 copies of the header line as it rewrote, and never released the old ones.)
3020 At the expense of a bit more processing, the header rewriting function has
3021 been changed so that it no longer eats memory in this way.
3022
302366. The generation of the Received: header has been moved from the time that a
3024 message starts to be received, to the time that it finishes. The timestamp
3025 in the Received: header should now be very close to that of the <= log
3026 line. There are two side-effects of this change:
3027
3028 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3029 logged header lines no longer include the local Received: line, because
3030 it has not yet been created. The same applies to a copy of the message
3031 that is returned to a non-SMTP sender when a message is rejected.
3032
3033 (b) When a filter file is tested using -bf, no additional Received: header
3034 is added to the test message. After some thought, I decided that this
3035 is a bug fix.
3036
3037 This change does not affect the value of $received_for. It is still set
3038 after address rewriting, but before local_scan() is called.
3039
304067. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3041
304268. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3043 gave an unhelpful panic error message, and a defer error. I have managed to
3044 change this behaviour so that it now rejects any supplied certificate,
3045 which seems right, as the list of acceptable certificates is empty.
3046
304769. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3048 gave an unhelpful defer error. I have not managed to make this reject any
3049 supplied certificates, but the error message it gives is "no certificate
3050 supplied", which is not helpful.
3051
305270. exigrep's output now also includes lines that are not associated with any
3053 message, but which match the given pattern. Implemented by a patch from
3054 Martin Sluka, which also tidied up the Perl a bit.
3055
305671. Recipient callout verification, like sender verification, was using <> in
3057 the MAIL FROM command. This isn't really the right thing, since the actual
3058 sender may affect whether the remote host accepts the recipient or not. I
3059 have changed it to use the actual sender in the callout; this means that
3060 the cache record is now keyed on a recipient/sender pair, not just the
3061 recipient address. There doesn't seem to be a real danger of callout loops,
3062 since a callout by the remote host to check the sender would use <>.
3063 [SEE ABOVE: changed after hitting problems.]
3064
306572. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3066 temporary errors. However, in the case of such a code being given after
3067 the end of a data transmission (i.e. after ".") Exim was failing to write
3068 a retry record for the message. (Yes, there was some broken host that was
3069 actually sending 8xx at this point.)
3070
307173. An unknown lookup type in a host list could cause Exim to panic-die when
3072 the list was checked. (An example that provoked this was putting <; in the
3073 middle of a list instead of at the start.) If this happened during a DATA
3074 ACL check, a -D file could be left lying around. This kind of configuration
3075 error no longer causes Exim to die; instead it causes a defer errror. The
3076 incident is still logged to the main and panic logs.
3077
307874. Buglet left over from Exim 3 conversion. The message "too many messages
3079 in one connection" was written to the rejectlog but not the mainlog, except
3080 when address rewriting (yes!) was being logged.
3081
308275. Added write_rejectlog option.
3083
308476. When a system filter was run not as root (that is, when system_filter_user
3085 was set), the values of the $n variables were not being returned to the
3086 main process; thus, they were not subsequently available in the $sn
3087 variables.
3088
308977. Added +return_path_on_delivery log selector.
3090
309178. A connection timeout was being treated differently from recipients deferred
3092 when testing hosts_max_try with a message that was older than the host's
3093 retry timeout. (The host should not be counted, thus allowing all hosts to
3094 be tried at least once before bouncing.) This may have been the cause of an
3095 occasionally reported bug whereby a message would remain on the queue
3096 longer than the retry timeout, but would be bounced if a delivery was
3097 forced. I say "may" because I never totally pinned down the problem;
3098 setting up timeout/retry tests is difficult. See also the next item.
3099
310079. The ultimate address timeout was not being applied to errors that involved
3101 a combination of host plus message (for example, a timeout on a MAIL
3102 command). When an address resolved to a number of possible hosts, and they
3103 were not all tried for each delivery (e.g. because of hosts_max_try), a
3104 message could remain on the queue longer than the retry timeout.
3105
310680. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3107 Haardt.
3108
310981. Fixed an obscure SMTP outgoing bug which required at least the following
3110 conditions: (a) there was another message waiting for the same server;
3111 (b) the server returned 5xx to all RCPT commands in the first message so
3112 that the message was not completed; (c) the server dropped the connection
3113 or gave a negative response to the RSET that Exim sends to abort the
3114 transaction. The observed case was a dropped connection after DATA that had
3115 been sent in pipelining mode. That is, the server had advertised PIPELINING
3116 but was not implementing it correctly. The effect of the bug was incorrect
3117 behaviour, such as trying another host, and this could lead to a crash.
3118
3119
3120Exim version 4.30
3121-----------------
3122
3123 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3124 and daemon.c were passed as pointers to ints; they should have been
3125 pointers to socklen_t variables (which are typically unsigned ints).
3126
3127 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3128 fixed.
3129
3130 3. Fixed a really odd bug that affected only the testing scheme; patching a
3131 certain fixed string in the binary changed the value of another string that
3132 happened to be identical to the end of the original first string.
3133
3134 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3135 name", it returns that address as the IP address. On some operating
3136 systems (e.g. Solaris), it also passes back the IP address string as the
3137 "host name". However, on others (e.g. Linux), it passes back an empty
3138 string. Exim wasn't checking for this, and was changing the host name to an
3139 empty string, assuming it had been canonicized.
3140
3141 5. Although rare, it is permitted to have more than one PTR record for a given
3142 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3143 all the names associated with an address, because they do in Solaris.
3144 However, it seems that they do not in Linux for data that comes from the
3145 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3146 I found this out when I moved to a new Linux workstation and tried to run
3147 the Exim test suite.
3148
3149 To get round this problem I have changed the code so that it now does its
3150 own call to the DNS to look up PTR records when searching for a host name.
3151 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3152 addresses that are only in /etc/hosts are still found.
3153
3154 This behaviour is, however, controlled by an option called host_lookup_
3155 order, which defaults to "bydns:byaddr". If people want to use the other
3156 order, or indeed, just use one or the other means of lookup, they can
3157 specify it in this variable.
3158
3159 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3160 some operating systems, this comes back from gethostbyaddr() as an empty
3161 string, and this is what Exim used to test for. However, it seems that in
3162 other systems, "." is yielded. Exim now tests for this case too.
3163
3164 7. The values of check_spool_space and check_log_space are now held internally
3165 as a number of kilobytes instead of an absolute number of bytes. If a
3166 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3167 kilobyte. This means that much larger values can be stored.
3168
3169 8. Exim monitor: an attempt to get the action menu when not actually pointing
3170 at a message produces an empty menu entitled "No message selected". This
3171 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3172 no entries in it ("Shell widget menu has zero width and/or height"). So I
3173 have added a single, blank menu entry in this case.
3174
3175 9. Added ${quote_local_part.
3176
317710. MIME decoding is now applied to the contents of Subject: header lines when
3178 they are logged.
3179
318011. Now that a reference to $sender_host_address automatically causes a reverse
3181 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3182 host lookup before query-style lookups in lists that might use this
3183 variable. This has therefore been abolished, and the "net-" prefix is no
3184 longer necessary for query-style lookups.
3185
318612. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3187 have been a typo for LFLAGS, so it has been changed.
3188
318913. The install script calls Exim with "-C /dev/null" in order to find the
3190 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3191 to be output. Howeve, since Exim outputs its version number before the
3192 error, it didn't break the script. It just looked ugly. I fixed this by
3193 always allowing "-C /dev/null" if the caller is root.
3194
319514. Ignore overlarge ACL variable number when reading spool file - insurance
3196 against a later release with more variables having written the file.
3197
319815. The standard form for an IPv6 address literal was being rejected by EHLO.
3199 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3200 this, as well as the form without the "IPv6" on the front.
3201
320216. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3203 OS/Makefile-Darwin file.
3204
320517. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3206 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3207
320818. After change 4.21/52, "%ld" was used to format the contents of the $inode
3209 variable. However, some OS use ints for inodes. I've added cast to long int
3210 to get rid of the compiler warning.
3211
321219. I had forgotten to lock out "/../" in configuration file names when
3213 ALT_CONFIG_PREFIX was set.
3214
321520. Routers used for verification do not need to specify transports. However,
3216 if such a router generated a host list, and callout was configured, Exim
3217 crashed, because it could not find a port number from the (non-existent)
3218 transport. It now assumes port 25 in this circumstance.
3219
322021. Added the -t option to exigrep.
3221
322222. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3223 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3224 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3225 them is set, LOOKUP_LSEARCH is forced.
3226
322723. "exim -bV" now outputs a list of lookups that are included in the binary.
3228
322924. Added sender and host information to the "rejected by local_scan()" log
3230 line; previously there was no indication of these.
3231
323225. Added .include_if_exists.
3233
323426. Change 3.952/11 added an explicit directory sync on top of a file sync for
3235 Linux. It turns out that not all file systems support this. Apparently some
3236 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3237 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3238 not supported on the file descriptor, is now ignored when Exim is trying to
3239 sync a directory. This applies only to Linux.
3240
324127. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3242
324328. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3244 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3245 this.
3246
324729. Added support for maildirsize files from supplied patch (modified a bit).
3248
324930. The use of :fail: followed by an empty string could lead Exim to respond to
3250 sender verification failures with (e.g.):
3251
3252 550 Verification failed for <xxx>
3253 550 Sender verify failed
3254
3255 where the first response line was missing the '-' that indicates it is not
3256 the final line of the response.
3257
325831. The loop for finding the name of the user that called Exim had a hardwired
3259 limit of 10; it now uses the value of finduser_retries, which is used for
3260 all other user lookups.
3261
326232. Added $received_count variable, available in data and not_smtp ACLs, and at
3263 delivery time.
3264
326533. Exim was neglecting to zero errno before one call of strtol() when
3266 expanding a string and expecting an integer value. On some systems this
3267 resulted in spurious "integer overflow" errors. Also, it was casting the
3268 result into an int without checking.
3269
327034. Testing for a connection timeout using "timeout_connect" in the retry rules
3271 did not work. The code looks as if it has *never* worked, though it appears
3272 to have been documented since at least releast 1.62. I have made it work.
3273
327435. The "timeout_DNS" error in retry rules, also documented since at least
3275 1.62, also never worked. As it isn't clear exactly what this means, and
3276 clearly it isn't a major issue, I have abolished the feature by treating it
3277 as "timeout", and writing a warning to the main and panic logs.
3278
327936. The display of retry rules for -brt wasn't always showing the error code
3280 correctly.
3281
328237. Added new error conditions to retry rules: timeout_A, timeout_MX,
3283 timeout_connect_A, timeout_connect_MX.
3284
328538. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3286 to the empty sender.
3287
328839. The daemon was not analysing the content of -oX till after it had closed
3289 stderr and disconnected from the controlling terminal. This meant that any
3290 syntax errors were only noted on the panic log, and the return code from
3291 the command was 0. By re-arranging the code a little, I've made the
3292 decoding happen first, so such errors now appear on stderr, and the return
3293 code is 1. However, the actual setting up of the sockets still happens in
3294 the disconnected process, so errors there are still only recorded on the
3295 panic log.
3296
329740. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3298 connections (as happens on some IP stacks) was logged at start up time as
3299 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3300 it from "IPv6 and IPv4", which means that two separate sockets are being
3301 used.
3302
330341. The debug output for gethostbyname2() or getipnodebyname() failures now
3304 says whether AF_INET or AF_INET6 was passed as an argument.
3305
330642. Exiwhat output was messed up when time zones were included in log
3307 timestamps.
3308
330943. Exiwhat now gives more information about the daemon's listening ports,
3310 and whether -tls-on-connect was used.
3311
331244. The "port" option of the smtp transport is now expanded.
3313
331445. A "message" modifier in a "warn" statement in a non-message ACL was being
3315 silently ignored. Now an error message is written to the main and panic
3316 logs.
3317
331846. There's a new ACL modifier called "logwrite" which writes to a log file
3319 as soon as it is encountered.
3320
332147. Added $local_user_uid and $local_user_gid at routing time.
3322
332348. Exim crashed when trying to verify a sender address that was being
3324 rewritten to "<>".
3325
332649. Exim was recognizing only a space character after ".include". It now also
3327 recognizes a tab character.
3328
332950. Fixed several bugs in the Perl script that creates the exim.8 man page by
3330 extracting the relevant information from the specification. The man page no
3331 longer contains scrambled data for the -d option, and I've added a section
3332 at the front about calling Exim under different names.
3333
333451. Added "extra_headers" argument to the "mail" command in filter files.
3335
333652. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3337 crash.
3338
333953. Installed eximstats 1.29.
3340
334154. Added transport_filter_timeout as a generic transport option.
3342
334355. Exim no longer adds an empty Bcc: header to messages that have no To: or
3344 Cc: header lines. This was required by RFC 822, but it not required by RFC
3345 2822.
3346
334756. Exim used to add From:, Date:, and Message-Id: header lines to any
3348 incoming messages that did not have them. Now it does so only if the
3349 message originates locally, that is, if there is no associated remote host
3350 address. When Resent- header lines are present, this applies to the Resent-
3351 lines rather than the non-Resent- lines.
3352
335357. Drop incoming SMTP connection after too many syntax or protocol errors. The
3354 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3355
335658. Messages for configuration errors now include the name of the main
3357 configuration file - useful now that there may be more than one file in a
3358 list (.included file names were always shown).
3359
336059. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3361 for those rare installations that do not start the daemon as root or run it
3362 setuid root. I've cut out the call to initgroups() if the daemon is not
3363 root at that time.
3364
336560. The Exim user and group can now be bound into the binary as text strings
3366 that are looked up at the start of Exim's processing.
3367
336861. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3369
337062. Added $mailstore_basename variable.
3371
337263. Installed patch to sieve.c from Michael Haardt.
3373
337464. When Exim failed to open the panic log after failing to open the main log,
3375 the original message it was trying to log was written to stderr and debug
3376 output, but if they were not available (the usual case in production), it
3377 was lost. Now it is written to syslog before the two lines that record the
3378 failures to open the logs.
3379
338065. Users' Exim filters run in subprocesses under the user's uid. It is
3381 possible for a "deliver" command or an alias in a "personal" command to
3382 provoke an address rewrite. If logging of address rewriting is configured,
3383 this fails because the process is not running as root or exim. There may be
3384 a better way of dealing with this, but for the moment (because 4.30 needs
3385 to be released), I have disabled address rewrite logging when running a
3386 filter in a non-root, non-exim process.
3387
3388
3389Exim version 4.24
3390-----------------
3391
3392 1. The buildconfig auxiliary program wasn't quoting the value set for
3393 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3394 not defined. This bug was masked in 4.22 by the effect that was fixed in
3395 change 4.23/1.
3396
3397 2. Some messages that were rejected after a message id was allocated were
3398 shown as "incomplete" by exigrep. It no longer does this for messages that
3399 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3400
3401 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3402 have allow_domain_literals set, the ID did not get logged in the <= line.
3403 Domain literals are now always recognized in Message-ID: header lines.
3404
3405 4. The first argument for a ${extract expansion item is the key name or field
3406 number. Leading and trailing spaces in this item were not being ignored,
3407 causing some misleading effects.
3408
3409 5. When deliver_drop_privilege was set, single queue runner processes started
3410 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3411 same command in the process it spins off) were not dropping privilege.
3412
3413 6. When the daemon running as "exim" started a queue runner, it always
3414 re-executed Exim in the spun-off process. This is a waste of effort when
3415 deliver_drop_privilege is set. The new process now just calls the
3416 queue-runner function directly.
3417
3418
3419Exim version 4.23
3420-----------------
3421
3422 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3423 HEADERS_CHARSET.
3424
3425 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3426 ignored. Though the use of -oP was forcing the writing of a pid file, it
3427 was always written to the default place.
3428
3429 3. If the message "no IP address found for host xxxx" is generated during
3430 incoming verification, it is now followed by identification of the incoming
3431 connection (so you can more easily find what provoked it).
3432
3433 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3434
3435 5. Added some features to "harden" Exim a bit more against certain attacks:
3436
3437 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3438 be put in Local/Makefile. This is like the never_users runtime option,
3439 but it cannot be overridden. The default setting is "root".
3440
3441 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3442 prefix string with which any file named in a -C command line option
3443 must start.
3444
3445 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3446 is retained for -C and -D only if the caller of Exim is root. Without
3447 it, the exim user may also use -C and -D and retain privilege.
3448
3449 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3450 command line option is disabled.
3451
3452 6. Macro names set by the -D option must start with an upper case letter, just
3453 like macro names defined in the configuration file.
3454
3455 7. Added "dereference=" facility to LDAP.
3456
3457 8. Two instances of the typo "uknown" in the source files are fixed.
3458
3459 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3460 the Configure-Makefile script screwed up while processing it.
3461
346210. Incorporated PCRE 4.4.
3463
346411. The SMTP synchronization check was not operating right at the start of an
3465 SMTP session. For example, it could not catch a HELO sent before the client
3466 waited for the greeting. There is now a check for outstanding input at the
3467 point when the greeting is written. Because of the duplex, asynchronous
3468 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3469 way, but not yet received, when the check is performed.
3470
347112. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3472 on TCP/IP sockets, because this apparently causes some broken clients to
3473 timeout.
3474
347513. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3476 unchanged) from the Cygwin maintainer.
3477
347814. The code for -bV that shows what is in the binary showed "mbx" when maildir
3479 was supported instead of testing for mbx. Effectively a typo.
3480
348115. The spa authenticator server code was not checking that the input it
3482 received was valid base64.
3483
348416. The debug output line for the "set" modifier in ACLs was not showing the
3485 name of the variable that was being set.
3486
348717. Code tidy: the variable type "vtype_string" was never used. Removed it.
3488
348918. Previously, a reference to $sender_host_name did not cause a DNS reverse
3490 lookup on its own. Something else was needed to trigger the lookup. For
3491 example, a match in host_lookup or the need for a host name in a host list.
3492 Now, if $sender_host_name is referenced and the host name has not yet been
3493 looked up, a lookup is performed. If the lookup fails, the variable remains
3494 empty, and $host_lookup_failed is set to "1".
3495
349619. Added "eqi" as a case-independent comparison operator.
3497
349820. The saslauthd authentication condition could segfault if neither service
3499 nor realm was specified.
3500
350121. If an overflowing value such as "2048M" was set for message_size_limit, the
3502 error message that was logged was misleading, and incoming SMTP
3503 connections were dropped. The message is now more accurate, and temporary
3504 errors are given to SMTP connections.
3505
350622. In some error situations (such as 21 above) Exim rejects all SMTP commands
3507 (except RSET) with a 421 error, until QUIT is received. However, it was
3508 failing to send a response to QUIT.
3509
351023. The HELO ACL was being run before the code for helo_try_verify_hosts,
3511 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3512 ACL is now run after the helo_try_verify_hosts code.
3513
351424. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3515 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3516 case-independent, so other case variants are also recognized). Apparently
3517 some systems use these upper case variants.
3518
351925. If more than two messages were waiting for the same host, and a transport
3520 filter was specified for the transport, Exim sent two messages over the
3521 same TCP/IP connection, and then failed with "socket operation on non-
3522 socket" when it tried to send the third.
3523
352426. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3525
352627. The extern definition of crypt16() in expand.c was not being excluded when
3527 the OS had its own crypt16() function.
3528
352928. Added bounce_return_body as a new option, and bounce_return_size_limit
3530 as a preferred synonym for return_size_limit, both as an option and as an
3531 expansion variable.
3532
353329. Added LIBS=-liconv to OS/Makefile-OSF1.
3534
353530. Changed the default configuration ACL to relax the local part checking rule
3536 for addresses that are not in any local domains. For these addresses,
3537 slashes and pipe symbols are allowed within local parts, but the sequence
3538 /../ is explicitly forbidden.
3539
354031. SPA server authentication was not clearing the challenge buffer before
3541 using it.
3542
354332. log_message in a "warn" ACL statement was writing to the reject log as
3544 well as to the main log, which contradicts the documentation and doesn't
3545 seem right (because no rejection is happening). So I have stopped it.
3546
354733. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3548 However, I am unable to do any testing of this.
3549
355034. Fixed an infelicity in the appendfile transport. When checking directories
3551 for a mailbox, to see if any needed to be created, it was accidentally
3552 using path names with one or more superfluous leading slashes; tracing
3553 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3554
355535. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3556 contents are added to the log line that is written for every discarded
3557 recipient. (Previously a log_message setting was ignored.)
3558
355936. The ${quote: operator now quotes the string if it is empty.
3560
356137. The install script runs exim in order to find its version number. If for
3562 some reason other than non-existence or emptiness, which it checks, it
3563 could not run './exim', it was installing it with an empty version number,
3564 i.e. as "exim-". This error state is now caught, and the installation is
3565 aborted.
3566
356738. An argument was missing from the function that creates an error message
3568 when Exim fails to connect to the socket for saslauthd authentication.
3569 This could cause Exim to crash, or give a corrupted message.
3570
357139. Added isip, isip4, and isip6 to ${if conditions.
3572
357340. The ACL variables $acl_xx are now saved with the message, and can be
3574 accessed later in routers, transports, and filters.
3575
357641. The new lookup type nwildlsearch is like wildlsearch, except that the key
3577 strings in the file are not string-expanded.
3578
357942. If a MAIL command specified a SIZE value that was too large to fit into an
3580 int variable, the check against message_size_limit failed. Such values are
3581 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3582 day this will have to be increased, but I don't think I want to be around
3583 when emails are that large.
3584
3585
3586
3587Exim version 4.22
3588-----------------
3589
3590 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3591 iconv() is not standard in FreeBSD.
3592
3593 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3594 IPv6 enabled. The observed symptom was a segmentation fault on return from
3595 the function os_common_find_running_interfaces() in src/os.c.
3596
3597 3. In the check_special_case() function in daemon.c I had used "errno" as an
3598 argument name, which causes warnings on some systems. This was basically a
3599 typo, since it was named "eno" in the comments!
3600
3601 4. The code that waits for the clock to tick (at a resolution of some fraction
3602 of a second) so as to ensure message-id uniqueness was always waiting for
3603 at least one whole tick, when it could have waited for less. [This is
3604 almost certainly not relevant at current processor speeds, where it is
3605 unlikely to ever wait at all. But we try to future-proof.]
3606
3607 5. The function that sleeps for a time interval that includes fractions of a
3608 second contained a race. It did not block SIGALRM between setting the
3609 timer, and suspending (a couple of lines later). If the interval was short
3610 and the sigsuspend() was delayed until after it had expired, the suspension
3611 never ended. On busy systems this could lead to processes getting stuck for
3612 ever.
3613
3614 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3615 process, before it forks any delivery processes. The open lookup caching
3616 mechanism meant that the open file or database connection was passed into
3617 the delivery process. The problem was that delivery processes always tidy
3618 up cached lookup data. This could cause a problem for the next delivery
3619 process started by the queue runner, because the external queue runner
3620 process does not know about the closure. So the next delivery process
3621 still has data in the lookup cache. In the case of a file lookup, there was
3622 no problem because closing a file descriptor in a subprocess doesn't affect
3623 the parent. However, if the lookup was caching a connection to a database,
3624 the connection was closed, and the second delivery process was likely to
3625 see errors such as "PGSQL: query failed: server closed the connection
3626 unexpectedly". The problem has been fixed by closing all cached lookups
3627 in a queue runner before running a delivery process.
3628
3629 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3630 seem to have the "const" qualifier which it has on other OS. I've
3631 parameterised it.
3632
3633 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3634 *of the same type* (client or server) with the same public name that an
3635 error should be diagnosed.
3636
3637 9. When Exim looked up a host name for an IP address, but failed to find the
3638 original IP address when looking up the host name (a safety check), it
3639 output the message "<ip address> does not match any IP for NULL", which was
3640 confusing, to say the least. The bug was that the host name should have
3641 appeared instead of "NULL".
3642
364310. Since release 3.03, if Exim is called by a uid other than root or the Exim
3644 user that is built into the binary, and the -C or -D options is used, root
3645 privilege is dropped before the configuration file is read. In addition,
3646 logging is switched to stderr instead of the normal log files. If the
3647 configuration then re-defines the Exim user, the unprivilege