Alex Kiernan's patch for a problem with libradius.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
b4a9bda2 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.362 2006/06/28 13:59:12 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
805e5aab
TF
23TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs with
24 consistent privilege compared to when running as a daemon.
478be7b0 25
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
c59f5781 55
c887c79e
TF
56Exim version 4.62
57-----------------
58
59TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
60 other effects) broke the use of negated acl sub-conditions.
61
1cce3af8
PH
62PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
63 patch).
64
afb3eaaf
PH
65PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
66 "Deny" causes Exim to reject the incoming connection with a 554 error.
67 Unfortunately, if there is a major crisis, such as a disk failure,
68 tcp-wrappers gives "deny", whereas what one would like would be some
69 kind of temporary error. A kludge has been added to help with this.
70 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
71 554 error is used if errno is still zero or contains ENOENT (which occurs
72 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
73 451 error is used.
74
e173618b
PH
75PH/03 Add -lutil to the default FreeBSD LIBS setting.
76
dd16e114
PH
77PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
78 errors. Otherwise a message that provokes a temporary error (when other
79 messages do not) can cause a whole host to time out.
80
f7fd3850
PH
81PH/05 Batch deliveries by appendfile and pipe transports did not work when the
82 addresses were routed directly to files or pipes from a redirect router.
83 File deliveries just didn't batch; pipe deliveries might have suffered
84 odd errors.
85
d87df92c
PH
86PH/06 A failure to get a lock for a hints database would erroneously always say
87 "Failed to get write lock", even when it was really a read lock.
88
7e9f683d
PH
89PH/07 The appendfile transport was creating MBX lock files with a fixed mode
90 of 0600. This has been changed to use the value of the lockfile_mode
91 option (which defaults to 0600).
92
bfad5236
PH
93PH/08 Applied small patch from the Sieve maintainer.
94
01c490df
PH
95PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
96 folder from quota calculations, a direct delivery into this folder messed
97 up the contents of the maildirsize file. This was because the regex was
98 used only to exclude .Trash (or whatever) when the size of the mailbox
99 was calculated. There was no check that a delivery was happening into an
100 excluded directory. This bug has been fixed by ignoring all quota
101 processing for deliveries into excluded directories.
102
d6629cdc
PH
103PH/10 Added the maildirfolder_create_regex option to appendfile.
104
1cce3af8 105
214e2000
PH
106Exim version 4.61
107-----------------
108
109PH/01 The code for finding all the local interface addresses on a FreeBSD
110 system running IPv6 was broken. This may well have applied to all BSD
111 systems, as well as to others that have similar system calls. The broken
112 code found IPv4 interfaces correctly, but gave incorrect values for the
113 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
114 that it would not match correctly against @[] and not recognize the IPv6
115 addresses as local.
116
f9daeae0
PH
117PH/02 The ipliteral router was not recognizing addresses of the form user@
118 [ipv6:....] because it didn't know about the "ipv6:" prefix.
119
7e66e54d
PH
120PH/03 Added disable_ipv6.
121
c8ea1597
PH
122PH/04 Changed $reply_address to use the raw form of the headers instead of the
123 decoded form, because it is most often used to construct To: headers
124 lines in autoreplies, and the decoded form may well be syntactically
125 invalid. However, $reply_address has leading white space removed, and all
126 newlines turned into spaces so that the autoreply transport does not
127 grumble.
128
911f6fde
PH
129PH/05 If group was specified without a user on a router, and no group or user
130 was specified on a transport, the group from the router was ignored.
131
47ca6d6c
PH
132PH/06 Increased the number of ACL variables to 20 of each type, and arranged
133 for visible compile-time settings that can be used to change these
134 numbers, for those that want even more. Backwards compatibility with old
135 spool files has been maintained. However, going back to a previous Exim
136 release will lost any variables that are in spool files.
137
ed0e9820
PH
138PH/07 Two small changes when running in the test harness: increase delay when
139 passing a TCP/IP connection to a new process, in case the original
140 process has to generate a bounce, and remove special handling of
141 127.0.0.2 (sic), which is no longer necessary.
142
eff37e47
PH
143PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
144 be the same on different OS.
145
1921d2ea
PH
146PH/09 Moved a debug statement in filter processing to avoid a race problem when
147 testing.
148
b3f69ca8
JJ
149JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
150 whether --show-vars was specified or not
151
152JJ/02 exipick: Added support for new ACL variable spool format introduced
153 in 4.61-PH/06
154
424a1c63
PH
155PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
156 syntactically invalid From: or Reply-to: line, and a filter used this to
157 generate an autoreply, and therefore failed to obtain an address for the
158 autoreply, Exim could try to deliver to a non-existent relative file
159 name, causing unrelated and misleading errors. What now happens is that
160 it logs this as a hard delivery error, but does not attempt to create a
161 bounce message.
162
7a100415
PH
163PH/11 The exinext utility has a -C option for testing purposes, but although
164 the given file was scanned by exinext itself; it wasn't being passed on
165 when Exim was called.
166
19b9dc85
PH
167PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
168 an end-of-file indication when reading a command response.
169
309bd837
PH
170PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
171 compiled. In many other places in Exim, IPv6 addresses are always
172 recognized, so I have changed this. It also means that IPv4 domain
173 literals of the form [IPV4:n.n.n.n] are now always recognized.
174
59e82a2a
PH
175PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
176 used if the router is not running as root, for example, when verifying at
177 ACL time, or when using -bh. The debugging output from this situation was
178 non-existent - all you got was a failure to exec. I have made two
179 changes:
180
181 (a) Failures to set uid/gid, the current directory, or a process leader
182 in a subprocess such as that created by queryprogram now generate
183 suitable debugging ouput when -d is set.
184
185 (b) The queryprogram router detects when it is not running as root,
186 outputs suitable debugging information if -d is set, and then runs
187 the subprocess without attempting to change uid/gid.
188
9edc04ce
PH
189PH/15 Minor change to Makefile for building test_host (undocumented testing
190 feature).
191
1349e1e5
PH
192PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
193 additional section of a DNS packet that returns MX or SRV records.
194 Instead, it always explicitly searches for A/AAAA records. This avoids
195 major problems that occur when a DNS server includes only records of one
196 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
197 fixed another bug: if SRV records were looked up and the corresponding
198 address records were *not* found in the additional section, the port
199 values from the SRV records were lost.
200
ea49d0e1
PH
201PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
202 using the correct key (the original address) when searching the retry
203 rules in order to find which one to use for generating the retry hint.
204
064a94c9
PH
205PH/18 If quota_warn_message contains a From: header, Exim now refrains from
206 adding the default one. Similarly, if it contains a Reply-To: header, the
207 errors_reply_to option, if set, is not used.
208
727071f8
PH
209PH/19 When calculating a retry time, Exim used to measure the "time since
210 failure" by looking at the "first failed" field in the retry record. Now
211 it does not use this if it is later than than the arrival time of the
212 message. Instead it uses the arrival time. This makes for better
213 behaviour in cases where some deliveries succeed, thus re-setting the
214 "first failed" field. An example is a quota failure for a huge message
215 when small messages continue to be delivered. Without this change, the
216 "time since failure" will always be short, possible causing more frequent
217 delivery attempts for the huge message than are intended.
dd16e114 218 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 219
f78eb7c6
PH
220PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
221 $1, $2, $3) because the numerical variables can be reset during some
222 expansion items (e.g. "match"), thereby losing the authentication data.
223
21c28500
PH
224PH/21 Make -bV show the size of off_t variables so that the test suite can
225 decide whether to run tests for quotas > 2G.
226
227PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
228 mailbox_size, and mailbox_filecount in the appendfile transport. If a
229 filecount value is greater than 2G or if a quota value is greater than 2G
230 on a system where the size of off_t is not greater than 4, a panic error
231 is given.
232
1688f43b
PH
233PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
234 never match. The debug and -bh output now contains an explicit error
235 message indicating a malformed IPv4 address or mask.
236
237PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
238 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
239 PH/23 above applies.
240
9675b384
PH
241PH/25 Do not write to syslog when running in the test harness. The only
242 occasion when this arises is a failure to open the main or panic logs
243 (for which there is an explicit test).
244
6a3f1455
PH
245PH/26 Added the /no_tell option to "control=freeze".
246
dac79d3e
PH
247PH/27 If a host name lookup failed very early in a connection, for example, if
248 the IP address matched host_lookup and the reverse lookup yielded a name
249 that did not have a forward lookup, an error message of the form "no IP
250 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
251 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 252
5977a0b3
PH
253PH/28 An enabling patch from MH: add new function child_open_exim2() which
254 allows the sender and the authenticated sender to be set when
255 submitting a message from within Exim. Since child_open_exim() is
256 documented for local_scan(), the new function should be too.
257
c91535f3
PH
258PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
259 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
260 results in an empty string is now treated as unset.
261
0d46a8c8
PH
262PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
263
278c6e6c
PH
264PH/31 Added sender_verify_fail logging option.
265
2cbb4081
PH
266PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
267 needed by RFC 822 but not by RFC 2822 was commented out. I have now
268 tidied the source and removed it altogether.
269
3eef829e
PH
270PH/33 When a queue run was abandoned because the load average was too high, a
271 log line was always written; now it is written only if the queue_run log
272 selector is set. In addition, the log line for abandonment now contains
273 information about the queue run such as the pid. This is always present
274 in "start" and "stop" lines but was omitted from the "abandon" line.
275
1ab95fa6
PH
276PH/34 Omit spaces between a header name and the colon in the error message that
277 is given when verify = headers_syntax fails (if there are lots of them,
278 the message gets confusing).
279
230205fc
PH
280PH/35 Change the default for dns_check_names_pattern to allow slashes within
281 names, as there are now some PTR records that contain slashes. This check
282 is only to protect against broken name servers that fall over on strange
283 characters, so the fact that it applies to all lookups doesn't matter.
284
75e0e026
PH
285PH/36 Now that the new test suite is complete, we can remove some of the
286 special code in Exim that was needed for the old test suite. For example,
287 sorting DNS records because real resolvers return them in an arbitrary
288 order. The new test suite's fake resolver always returns records in the
289 same order.
290
291PH/37 When running in the test harness, use -odi for submitted messages (e.g.
292 bounces) except when queue_only is set, to avoid logging races between
293 the different processes.
294
145396a6
PH
295PH/38 Panic-die if .include specifies a non-absolute path.
296
3cd34f13
PH
297PH/39 A tweak to the "H" retry rule from its user.
298
11121d3d
JJ
299JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
300 a label. They prevented compilation on older perls.
301
302JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
303 a warning to be raised on newish perls.
304
305JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
306 on queue. Changes to match documented behaviour of showing count of
307 messages matching specified criteria.
308
8def5aaf
PH
309PH/40 Changed the default ident timeout from 30s to 5s.
310
929ba01c
PH
311PH/41 Added support for the use of login_cap features, on those BSD systems
312 that have them, for controlling the resources used by pipe deliveries.
313
2632889e
PH
314PH/42 The content-scanning code uses fopen() to create files in which to put
315 message data. Previously it was not paying any attention to the mode of
316 the files. Exim runs with umask(0) because the rest of the code creates
317 files with open(), and sets the required mode explicitly. Thus, these
318 files were ending up world-writeable. This was not a big issue, because,
319 being within the spool directory, they were not world-accessible. I have
320 created a function called modefopen, which takes an additional mode
321 argument. It sets umask(777), creates the file, chmods it to the required
322 mode, then resets the umask. All the relevant calls to fopen() in the
323 content scanning code have been changed to use this function.
324
944a9c55
PH
325PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
326 to 24 hours. This avoids potential overflow problems when processing G
327 and H retry rules. I suspect nobody ever tinkers with this value.
328
4a23603b
PH
329PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
330
4730f942
PH
331PH/45 When the plaintext authenticator is running as a client, the server's
332 challenges are checked to ensure they are valid base64 strings. By
333 default, the authentication attempt is cancelled if an invalid string is
334 received. Setting client_ignore_invalid_base64 true ignores these errors.
335 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
336 they are received. Thus, the responses can be made to depend on the
337 challenges. If an invalid string is ignored, an empty string is placed in
338 the variable.
339
30dba1e6
PH
340PH/46 Messages that are created by the autoreply transport now contains a
341 References: header, in accordance with RFCs 2822 and 3834.
342
382afc6b
PH
343PH/47 Added authenticated_sender_force to the smtp transport.
344
a86229cf
PH
345PH/48 The ${prvs expansion was broken on systems where time_t was long long.
346
50c99ba6
PH
347PH/49 Installed latest patch from the Sieve maintainer.
348
d35e429d
PH
349PH/50 When an Exim quota was set without a file count quota, and mailbox_size
350 was also set, the appendfile transport was unnecessarily scanning a
351 directory of message files (e.g. for maildir delivery) to find the count
352 of files (along with the size), even though it did not need this
353 information. It now does the scan only if it needs to find either the
354 size of the count of files.
355
f90d018c
PH
356PH/51 Added ${time_eval: to convert Exim time strings into seconds.
357
75def545
PH
358PH/52 Two bugs concerned with error handling when the smtp transport is
359 used in LMTP mode:
360
361 (i) Exim was not creating retry information for temporary errors given
362 for individual recipients after the DATA command when the smtp transport
363 was used in LMTP mode. This meant that they could be retried too
364 frequently, and not timed out correctly.
365
366 (ii) Exim was setting the flag that allows error details to be returned
367 for LMTP errors on RCPT commands, but not for LMTP errors for individual
368 recipients that were returned after the DATA command.
369
370PH/53 This is related to PH/52, but is more general: for any failing address,
371 when detailed error information was permitted to be returned to the
372 sender, but the error was temporary, then after the final timeout, only
373 "retry timeout exceeded" was returned. Now it returns the full error as
374 well as "retry timeout exceeded".
375
c46782ef
PH
376PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
377 do this, and (what is worse) MTAs that accept it.
378
71fafd95
PH
379PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
380 will now be deprecated.
381
2c5db4fd
PH
382PH/56 New os.c-cygwin from the Cygwin maintainer.
383
9cf6b11a
JJ
384JJ/06 exipick: added --unsorted option to allow unsorted output in all output
385 formats (previously only available in exim formats via -bpr, -bpru,
386 and -bpra. Now also available in native and exiqgrep formats)
387
388JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
389 with very large, slow to parse queues
390
391JJ/08 exipick: added ! as generic prefix to negate any criteria format
392
393JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
394
898d150f
PH
395PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
396 responses to authentication challenges, though it was showing the
397 challenges; (ii) I've removed the CR characters from the debug output for
398 SMTP output lines.
399
46218253
PH
400PH/58 Allow for the insertion of a newline as well as a space when a string
401 is turned into more than one encoded-word during RFC 2047 encoding. The
402 Sieve code now uses this.
403
e97957bc
PH
404PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
405 data_4xx, lost_connection, tls_required.
406
81e509d7
PH
407PH/60 When a VRFY deferred or FAILED, the log message rather than the user
408 message was being sent as an SMTP response.
409
3d240ff7
PH
410PH/61 Add -l and -k options to exicyclog.
411
b37c4101
PH
412PH/62 When verifying, if an address was redirected to one new address, so that
413 verification continued, and the new address failed or deferred after
414 having set something in $address_data, the value of $address_data was not
415 passed back to the ACL. This was different to the case when no
416 redirection occurred. The value is now passed back in both cases.
417
79378e0f
PH
418PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
419 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
420 use login_cap.h, so on its own it isn't the distinguishing feature. The
421 new name refers directly to the setclassresources() function.
422
e49c7bb4
PH
423PH/65 Added configuration files for NetBSD3.
424
d114ec46
PH
425PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
426
f3d7df6c
PH
427PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
428 is preferred over IPv4.
429
715ab376
PH
430PH/68 The bounce_return_message and bounce_return_body options were not being
431 honoured for bounces generated during the reception of non-SMTP messages.
432 In particular, this applied to messages rejected by the ACL. This bug has
433 been fixed. However, if bounce_return_message is true and bounce_return_
434 body is false, the headers that are returned for a non-SMTP message
435 include only those that have been read before the error was detected.
436 (In the case of an ACL rejection, they have all been read.)
437
6b31b150
PH
438PH/69 The HTML version of the specification is now built in a directory called
439 spec_html instead of spec.html, because the latter looks like a path with
440 a MIME-type, and this confuses some software.
441
442PH/70 Catch two compiler warnings in sieve.c.
443
d515a917
PH
444PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
445 function verify_get_ident() calls ip_connect() to connect a socket, but
446 if the "connect()" function timed out, ip_connect() used to close the
447 socket. However, verify_get_ident() also closes the socket later, and in
448 between Exim writes to the log, which may get opened at this point. When
449 the socket was closed in ip_connect(), the log could get the same file
450 descriptor number as the socket. This naturally causes chaos. The fix is
451 not to close the socket in ip_connect(); the socket should be closed by
452 the function that creates it. There was only one place in the code where
453 this was missing, in the iplookup router, which I don't think anybody now
454 uses, but I've fixed it anyway.
455
9b8fadde
PH
456PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
457 well as to direct DNS lookups. Otherwise the handling of names in host
458 lists is inconsistent and therefore confusing.
459
214e2000 460
5de37277
PH
461Exim version 4.60
462-----------------
463
cc38ddbf
PH
464PH/01 Two changes to the default runtime configuration:
465
466 (1) Move the checks for relay_from_hosts and authenticated clients from
467 after to before the (commented out) DNS black list checks.
468
469 (2) Add control=submission to the relay_from_hosts and authenticated
470 clients checks, on the grounds that messages accepted by these
471 statements are most likely to be submissions.
5de37277 472
72fdd6ae
PH
473PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
474
475 (1) Generate an error if the third argument for the ${prvs expansion is
476 not a single digit.
477
478 (2) Treat a missing third argument of ${prvscheck as if it were an empty
479 string.
480
481 (3) Reset the variables that are obtained from the first argument of
482 ${prvscheck and used in the second argument before leaving the code,
483 because their memory is reclaimed, so using them afterwards may do
484 silly things.
485
486 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
487 one (it's much easier than Tom thought :-).
488
489 (5) Because of (4), we can now allow for the use of $prvscheck_result
490 inside the third argument.
cb9328de 491
cb741023
PH
492PH/03 For some reason, the default setting of PATH when running a command from
493 a pipe transport was just "/usr/bin". I have changed it to
494 "/bin:/usr/bin".
495
f174f16e
PH
496PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
497 anything to be listed in the output from -bV.
b2f5a032 498
c25242d7
PH
499PH/05 When a filter generated an autoreply, the entire To: header line was
500 quoted in the delivery log line, like this:
501
502 => >A.N.Other <ano@some.domain> <original@ddress> ...
503
504 This has been changed so that it extracts the operative address. There
505 may be more than one such address. If so, they are comma-separated, like
506 this:
507
508 => >ano@some.domain,ona@other.domain <original@ddress> ...
509
82c19f95
PH
510PH/06 When a client host used a correct literal IP address in a HELO or EHLO
511 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
512 not being looked up in the rDNS to get a host name, Exim was showing the
513 IP address twice in Received: lines, even though the IP addresses were
514 identical. For example:
515
516 Received: from [1.2.3.4] (helo=[1.2.3.4])
517
518 However, if the real host name was known, it was omitting the HELO data
519 if it matched the actual IP address. This has been tidied up so that it
520 doesn't show the same IP address twice.
521
d7ffbc12
PH
522PH/07 When both +timestamp and +memory debugging was on, the value given by
523 $tod_xxx expansions could be wrong, because the tod_stamp() function was
524 called by the debug printing, thereby overwriting the timestamp buffer.
525 Debugging no longer uses the tod_stamp() function when +timestamp is set.
526
9f526266
PH
527PH/08 When the original message was included in an autoreply transport, it
528 always said "this is a copy of the message, including all the headers",
529 even if body_only or headers_only was set. It now gives an appropriate
530 message.
531
87fcc8b9
PH
532PH/09 Applied a patch from the Sieve maintainer which:
533
534 o fixes some comments
535 o adds the (disabled) notify extension core
536 o adds some debug output for the result of if/elsif tests
537 o points to the current vacation draft in the documentation
538 and documents the missing references header update
539
540 and most important:
541
542 o fixes a bug in processing the envelope test (when testing
543 multiple envelope elements, the last element determinted the
544 result)
545
456682f5
PH
546PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
547 Electronic Mail") by including:
548
549 Auto-submitted: auto-generated
550
551 in the messages that it generates (bounce messages and others, such as
552 warnings). In the case of bounce messages for non-SMTP mesages, there was
553 also a typo: it was using "Auto_submitted" (underscore instead of
554 hyphen). Since every message generated by Exim is necessarily in response
555 to another message, thes have all been changed to:
556
557 Auto-Submitted: auto-replied
558
559 in accordance with these statements in the RFC:
560
561 The auto-replied keyword:
562
563 - SHOULD be used on messages sent in direct response to another
564 message by an automatic process,
565
566 - MUST NOT be used on manually-generated messages,
567
568 - MAY be used on Delivery Status Notifications (DSNs) and Message
569 Disposition Notifications (MDNs),
570
571 - MUST NOT be used on messages generated by automatic or periodic
572 processes, except for messages which are automatic responses to
573 other messages.
574
3e46c1aa
PH
575PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
576 to the default Received: header definition.
456682f5 577
49826d12
PH
578PH/12 Added log selector acl_warn_skipped (default on).
579
eba0c039
PH
580PH/13 After a successful wildlsearch lookup, discard the values of numeric
581 variables because (a) they are in the wrong storage pool and (b) even if
582 they were copied, it wouldn't work properly because of the caching.
583
a0d6ba8a
PH
584PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
585 checking when decoding. Apparently there are clients that generate
586 overlong encoded strings. Why am I not surprised?
587
f0917727
PH
588PH/15 If the first argument of "${if match_address" was not empty, but did not
589 contain an "@" character, Exim crashed. Now it writes a panic log message
590 and treats the condition as false.
591
096fee00
PH
592PH/16 In autoreply, treat an empty string for "once" the same as unset.
593
024bd3c2
PH
594PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
595 extension "envelope-auth". The code is finished and in agreement with
596 other implementations, but there is no documentation so far and in fact,
597 nobody wrote the draft yet. This extension is currently #undef'ed, thus
598 not changing the active code.
599
600 Print executed "if" and "elsif" statements when debugging is used. This
601 helps a great deal to understand what a filter does.
602
603 Document more things not specified clearly in RFC3028. I had all this
604 sorted out, when out of a sudden new issues came to my mind. Oops."
605
df199fec
PH
606PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
607 (Bugzilla #53).
608
d27f1df3
PH
609PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
610 canonical form (as documented). However, after a host name lookup from
611 the IP address, check_host() was doing a simple string comparison with
612 addresses acquired from the DNS when checking that the found name did
613 have the original IP as one of its addresses. Since any found IPv6
614 addresses are likely to be in abbreviated form, the comparison could
615 fail. Luckily, there already exists a function for doing the comparison
616 by converting both addresses to binary, so now that is used instead of
617 the text comparison.
618
96776534
PH
619PH/20 There was another similar case to PH/19, when a complete host name was
620 given in a host list; looking up its IP address could give an abbreviated
621 form, whereas the current host's name might or might not be abbreviated.
622 The same fix has been applied.
623
5de37277 624
9a799bc0
PH
625Exim version 4.54
626-----------------
627
628PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
629 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
630 It now does.
631
99a4b039
PH
632PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
633 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
634
635PH/03 Typo: missing ".o" in src/pcre/Makefile.
636
4b233853
PH
637PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
638 header line, restrict the check to what is listed in RFCs 2369 and 2929.
639 Also, for "Auto-Submitted", treat anything other than "no" as
640 non-personal, in accordance with RFC 3834. (Previously it treated
641 anything starting "auto-" as non-personal.)
642
8857ccfd
PH
643TF/01 The control=submission/name=... option had a problem with syntax
644 errors if the name included a slash character. The /name= option
645 now slurps the rest of the string, so it can include any characters
646 but it must come last in the list of options (after /sender_retain
647 or /domain=).
648
433a2980
PH
649PH/05 Some modifications to the interface to the fake nameserver for the new
650 testing suite.
651
3e46c1aa 652
9a799bc0 653
e3a311ba
TK
654Exim version 4.53
655-----------------
656
657TK/01 Added the "success_on_redirect" address verification option. See
658 NewStuff for rationale and an example.
659
13b685f9
PH
660PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
661
395ff96d
PH
662PH/02 Patch to exigrep to allow it to work on syslog lines.
663
5b68f6e4
PH
664PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
665 fread() to skip over the body file's header line, because in Cygwin the
666 header line is locked and is inaccessible.
667
1ab52c69
PH
668PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
669 co-exist for some time) to make it clear that it is the Exim ID that is
670 referenced, not the Message-ID: header line.
671
b07e6aa3
PH
672PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
673 string_format() function, because snprintf() does not exist on all
674 operating systems.
675
254e032f
PH
676PH/06 The use of forbid_filter_existstest now also locks out the use of the
677 ${stat: expansion item.
678
3af76a81
PH
679PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
680 protocol synchronization error", to keep the pedants happy.
681
2548ba04
PH
682PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
683 well as for IRIX systems, when gcc is being used. See the host.c source
684 file for comments.
685
b6c6011d
PH
686PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
687
cf39cf57
PH
688PH/10 Named domain lists were not working if used in a queue_smtp_domains
689 setting.
690
f1513293
PH
691PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
692 transport and to the smtp transport in LMTP mode.
693
727549a4
PH
694TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
695
af46795e
PH
696PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
697 run a filter in a subprocess. This could lead to confusion in subsequent
698 lookups in the parent process. There should also be a search_tidyup() at
699 the end of the subprocess.
700
d7b47fd0
PH
701PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
702 only if the host matched helo_try_verify_hosts, which caused the
703 verification to occur when the EHLO/HELO command was issued. The ACL just
704 tested the remembered result. Now, if a previous verification attempt has
705 not happened, "verify = helo" does it there and then.
706
ee744174
JJ
707JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
708
b582ab87
PH
709TK/03 Fix log output including CR from clamd.
710
41a13e0a
PH
711PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
712 exist provoked a memory error which could cause a segfault.
713
f625cc5a
PH
714PH/15 Installed PCRE 6.2
715
716PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
717
21f7af35
PH
718PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
719 of the problem. Specifically, suggested +O2 rather than +O1 for the
720 HP-UX compiler.
721
31480e42
PH
722PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
723
2d280592
PH
724PH/20 If a delivery was routed to a non-standard port by means of an SRV
725 record, the port was not correctly logged when the outgoing_port log
726 selector was set (it logged the transort's default port).
727
7cd1141b
PH
728PH/21 Added support for host-specific ports to manualroute, queryprogram,
729 fallback_hosts, and "hosts" in the smtp transport.
730
731PH/22 If the log selector "outgoing_port" is set, the port is now also given on
732 host errors such as "Connection refused".
733
750af86e
PH
734PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
735 authentication with radiusclient 0.4.9:
736
737 - Error returned from rc_read_config was caught wrongly
738 - Username/password not passed on to radius server due to wrong length.
739
740 The presumption is that some radiusclient API changes for 4.51/PH/17
741 were not taken care of correctly. The code is still untested by me (my
742 Linux distribution still has 0.3.2 of radiusclient), but it was
743 contributed by a Radius user.
744
745PH/24 When doing a callout, the value of $domain wasn't set correctly when
746 expanding the "port" option of the smtp transport.
747
4304270b
TK
748TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
749 while reading a MIME header. Thanks to Tom Hughes for a patch.
750
750af86e
PH
751PH/24 Include config.h inside local_scan.h so that configuration settings are
752 available.
753
64ffc24f
PH
754PH/25 Make $smtp_command_argument available after all SMTP commands. This means
755 that in an ACL for RCPT (for example), you can examine exactly what was
756 received.
757
5dd9625b
PH
758PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
759 commands, but it was not correctly comparing the address with the actual
760 client host address. Thus, it would show the EHLO address in Received:
761 header lines when this was not necessary.
762
5591031b
PH
763PH/27 Added the % operator to ${eval:}.
764
ba18e66a
PH
765PH/28 Exim tries to create and chdir to its spool directory when it starts;
766 it should be ignoring failures (because with -C, for example, it has lost
767 privilege). It wasn't ignoring creation failures other than "already
768 exists".
769
9cec981f
PH
770PH/29 Added "crypteq" to the list of supported features that Exim outputs when
771 -bV or -d is used.
772
aa2b5c79
PH
773PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
774 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
775 too many continuations, the temporary file was not being removed, and the
776 return code was incorrect.
aa2b5c79 777
48a53b7f
PH
778PH/31 Missing "BOOL" in function definition in filtertest.c.
779
1c59d63b
PH
780PH/32 Applied Sieve patches from the maintainer.
781
671012da
TK
782TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
783
1509d3a8
PH
784PH/33 Added "verify = not_blind".
785
786PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
787 Local/Makefile (with some defaults set). These are used in built scripts
788 such as exicyclog, but they have never been used in the exim_install
789 script (though there are many overriding facilities there). I have
790 arranged that the exim_install script now takes note of these two
791 settings.
792
793PH/35 Installed configuration files for Dragonfly.
794
2fe1a124
PH
795PH/36 When a locally submitted message by a trusted user did not contain a
796 From: header, and the sender address was obtained from -f or from an SMTP
797 MAIL command, and the trusted user did not use -F to supply a sender
798 name, $originator_name was incorrectly used when constructing a From:
799 header. Furthermore, $originator_name was used for submission mode
800 messages from external hosts without From: headers in a similar way,
801 which is clearly wrong.
802
8800895a
PH
803PH/37 Added control=suppress_local_fixups.
804
ccfdb010
PH
805PH/38 When log_selector = +received_sender was set, and the addition of the
806 sender made the log line's construction buffer exactly full, or one byte
807 less than full, an overflow happened when the terminating "\n" was
808 subsequently added.
809
1130bfb0
PH
810PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
811 when the result of a list match is failure because a DNS lookup failed.
812
ebcb507f
PH
813PH/40 RM_COMMAND is now used in the building process.
814
c35e155c
PH
815PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
816 the "build-* directories that it finds.
817
95d1f782
PH
818PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
819 address in a domain literal was a prefix of an interface address.
820
fd6de02e
PH
821PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
822 when verifying a sender address, unless rewrite_headers is false.
823
58de37c5
PH
824PH/44 Wrote a long comment about why errors_to addresses are verified as
825 recipients, not senders.
826
261cf466
TF
827TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
828 the ratelimit ACL was added.
829
3ee512ff
PH
830PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
831
e08c430f
PH
832PH/46 Added extra information about PostgreSQL errors to the error string.
833
bef5a11f
PH
834PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
835 avoiding the need to install special zones in a real server. This is
836 backwards compatible; if it can't find the fake resolver, it drops back.
837 Thus, both old and new test suites can be run.
838
7546de58
TF
839TF/02 Added util/ratelimit.pl
840
e5d5a95f
TF
841TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
842 clock is set back in time.
843
2e88a017
TF
844TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
845 Candler <B.Candler@pobox.com>.
846
a5f65aa4
TF
847TF/05 The fix for PH/43 was not completely correct; widen_domains is always
848 OK for addresses that are the result of redirections.
849
e7726cbf
PH
850PH/48 A number of further additions for the benefit of the new test suite,
851 including a fake gethostbyname() that interfaces to the fake DNS resolver
852 (see PH/47 above).
853
a7fdad5b
TF
854TF/06 The fix for widen_domains has also been applied to qualify_single and
855 search_parents which are the other dnslookup options that can cause
856 header rewrites.
857
6af56900
PH
858PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
859 type ("H").
860
0925ede6
PH
861PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
862
66afa403
TF
863TF/07 Exim produced the error message "an SRV record indicated no SMTP
864 service" if it encountered an MX record with an empty target hostname.
865 The message is now "an MX or SRV record indicated no SMTP service".
866
0154e85a
TF
867TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
868 if the DNS of the sending site is misconfigured. This is quite a
869 common situation. This change restores the behaviour of treating a
870 helo verification defer as a failure.
871
16f12c76
PH
872PH/51 If self=fail was set on a router, the bounce message did not include the
873 actual error message.
874
bbe902f0 875
e5a9dba6
PH
876Exim version 4.52
877-----------------
878
879TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
880
22c3b60b
PH
881PH/01 When a transport filter timed out in a pipe delivery, and the pipe
882 command itself ended in error, the underlying message about the transport
883 filter timeout was being overwritten with the pipe command error. Now the
884 underlying error message should be appended to the second error message.
885
06a9b4b5
PH
886TK/01 Fix poll() being unavailable on Mac OSX 10.2.
887
c1ac6996
PH
888PH/02 Reduce the amount of output that "make" produces by default. Full output
889 can still be requested.
890
9c7a242c
PH
891PH/03 The warning log line about a condition test deferring for a "warn" verb
892 was being output only once per connection, rather than after each
893 occurrence (because it was using the same function as for successful
894 "warn" verbs). This seems wrong, so I have changed it.
895
87ba3f5f
PH
896TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
897 it should not have, which might have caused a crash in the right
898 circumstances, but probably never did.
899
900PH/04 Installed a modified version of Tony Finch's patch to make submission
901 mode fix the return path as well as the Sender: header line, and to
902 add a /name= option so that you can make the user's friendly name appear
903 in the header line.
904
29aba418
TF
905TF/03 Added the control = fakedefer ACL modifier.
906
fe0dab11
TF
907TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
908 Mark Lowes for thorough testing.
870f6ba8 909
11d337a4
TK
910TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
911
912TK/03 Merged latest SRS patch from Miles Wilton.
913
415c8f3b
PH
914PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
915 with the definition in sysexits.h (which is #included earlier).
916 Fortunately, Exim does not actually use EX_OK. The code used to try to
917 preserve the sysexits.h value, by assumimg that macro definitions were
918 scanned for macro replacements. I have been disabused of this notion,
919 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 920
958541e9
PH
921PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
922 in the smtp transport. When a block could not be written in a single
923 write() function, the timeout was being re-applied to each part-write.
924 This seems wrong - if the receiver was accepting one byte at a time it
925 would take for ever. The timeout is now adjusted when this happens. It
926 doesn't have to be particularly precise.
927
c206415f
TK
928TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
929 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
930
2a4be8f9
PH
931PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
932 without a domain if the check to <postmaster@domain> fails.
933
1cba11c5
SC
934SC/01 Eximstats: added -xls and the ability to specify output files
935 (patch written by Frank Heydlauf).
936
937SC/02 Eximstats: use FileHandles for outputing results.
938
939SC/03 Eximstats: allow any combination of xls, txt, and html output.
940
941SC/04 Eximstats: fixed display of large numbers with -nvr option
942
943SC/05 Eximstats: fixed merging of reports with empty tables.
944
945SC/06 Eximstats: added the -include_original_destination flag
946
947SC/07 Eximstats: removed tabs and trailing whitespace.
948
1005d00e
TK
949TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
950
951TK/06 MBOX spool code: Add real "From " MBOX separator line
952 so the .eml file is really in mbox format (even though
953 most programs do not really care). Patch from Alex Miller.
954
955TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
956 The latter is generated from $received_to and is only set if the
957 message has one envelope recipient. SA can use these headers,
958 obviously out-of-the-box. Patch from Alex Miller.
959
9b4768fa
PH
960PH/08 The ${def test on a variable was returning false if the variable's
961 value was "0", contrary to what the specification has always said!
962 The result should be true unless the variable is empty.
963
964PH/09 The syntax error of a character other than { following "${if
965 def:variable_name" (after optional whitespace) was not being diagnosed.
966 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
967 accidental colon was present, for example, could give incorrect results.
968
0d7eb84a
PH
969PH/10 Tidied the code in a number of places where the st_size field of a stat()
970 result is used (not including appendfile, where other changes are about
971 to be made).
972
973PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
974 This involved changing a lot of size variables from int to off_t. It
975 should work with maildirs and everything.
976
40727bee
TK
977TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
978 spamd dying while we are connected to it.
979
554d2369
TF
980TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
981 <jgh@wizmail.org>
982
1f922db1
PH
983PH/12 Applied Alex Kiernan's patch for the API change for the error callback
984 function for BDB 4.3.
985
ef213c3b
PH
986PH/13 Changed auto_thaw such that it does not apply to bounce messages.
987
8ac170f3
PH
988PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
989 the sources for PCRE have been re-arranged and more files are now
990 involved.
991
b1c749bb
PH
992PH/15 The code I had for printing potentially long long variables in PH/11
993 above was not the best (it lost precision). The length of off_t variables
994 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
995 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
996 to be "long long int" or "long int". This is needed for the internal
997 formatting function string_vformat().
b1c749bb 998
4aac9b49
PH
999PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1000 the configuration file to be ":syslog", then the script "guesses" where
1001 the logs files are, rather than using the compiled in default. In our
1002 case the guess is not the same as the compiled default, so the script
1003 suddenly stopped working when I started to use syslog. The patch checks
1004 to see if log_file_path is "". If so, it attempts to read it from exim
1005 with no configuration file to get the compiled in version, before it
1006 falls back to the previous guessing code."
1007
294520c8
TK
1008TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1009 implementing BATV in an Exim configuration. See NewStuff for the gory
1010 details.
1011
5bd022fe
PH
1012PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1013 Makefile that are specific to HP-UX.
1014
90e9ce59
PH
1015PH/18 If the "use_postmaster" option was set for a recipient callout together
1016 with the "random" option, the postmaster address was used as the MAIL
1017 FROM address for the random test, but not for the subsequent recipient
1018 test. It is now used for both.
1019
5ea81592
PH
1020PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1021 patch removes a few documentation additions to RFC 3028, because the
1022 latest draft now contains them. It adds the new en;ascii-case comparator
1023 and a new error check for 8bit text in MIME parts. Comparator and
1024 require names are now matched exactly. I enabled the subaddress
1025 extension, but it is not well tested yet (read: it works for me)."
1026
c6c2dc1d
PH
1027PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1028 rework some of the code of TK/09 above to avoid the hardwired use of
1029 "%lld" and "long long". Replaced the call to snprintf() with a call to
1030 string_vformat().
1031
fffffe4c
PH
1032PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1033 records point to non-existent hosts", "retry timeout exceeded", and
1034 "retry time not reached for any host after a long failure period".
ca02eafb 1035
9a26b6b2
PH
1036PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1037 experimental DomainKeys support:
1038
1039 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1040 (2) On an error such as an illegally used "control", the wrong name for
1041 the control was given.
1042
1043 These problems did NOT occur unless DomainKeys support was compiled.
1044
4aee0225
PH
1045PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1046
32d668a5
PH
1047PH/24 Added ${if match_ip condition.
1048
8187c3f3
PH
1049PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1050 databases so that it will be absolutely obvious if a crash occurs in the
1051 DB library. This is a regular occurrence (often caused by mis-matched
1052 db.h files).
1053
ff790e47 1054PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1055 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1056 picked up on a user's system that detects such things. There doesn't seem
1057 to be a gcc warning option for this - only an attribute that has to be
1058 put on the function's prototype. It seems that in Fedora Core 4 they have
1059 set this on a number of new functions. No doubt there will be more in due
1060 course.
ff790e47 1061
5417f6d1
PH
1062PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1063 specify a transport. However, if an address that was verified by such a
1064 router was the subject of a callout, Exim crashed because it tried to
1065 read the rcpt_include_affixes from the non-existent transport. Now it
1066 just assumes that the setting of that option is false. This bug was
1067 introduced by 4.51/PH/31.
1068
59cf8544
PH
1069PH/28 Changed -d+all to exclude +memory, because that information is very
1070 rarely of interest, but it makes the output a lot bigger. People tend to
1071 do -d+all out of habit.
1072
e7ad8a65
PH
1073PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1074 code in os-type was giving problems when libc.so lives in lib64, like on
1075 x86_64 Fedora Core.
1076
ade42478
PH
1077PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1078 aren't the modern standard, and it seems that some systems' include files
1079 don't always have them. Exim was already checking for some of the newer
1080 ones like T_AAAA, and defining it itself. I've added checks for all the
1081 record types that Exim uses.
1082
182ad5cf
PH
1083PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1084 not automatically generating a new one, as it is supposed to. This
1085 prevented TLS from working. If the file did exist, but contained invalid
1086 data, a new version was generated, as expected. It was only the case of a
1087 non-existent file that was broken.
1088
b0d9fc80
TK
1089TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1090 with a change in libdomainkeys > 0.64.
1091
1092TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1093 from DNS. If the selector record carries the flag, it now has
1094 precedence over the domain-wide flag.
1095
1096TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1097
47c7a64a
PH
1098PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1099 the use of a port name that isn't defined in /etc/services) occurred, the
1100 message was deferred as in a normal delivery, and thus remained on the
1101 spool, instead of being failed because of the mua_wrapper setting. This
1102 is now fixed, and I tidied up some of the mua_wrapper messages at the
1103 same time.
1104
a388bce4
SC
1105SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1106 the messages in a hash of arrays rather than using individual hashes.
1107 This is a bit cleaner and results in dramatic memory savings, albeit
1108 at a slight CPU cost.
1109
1110SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1111 as requested by Marc Sherman.
1112
1113SC/10 Eximstats: added histograms for user specified patterns as requested
1114 by Marc Sherman.
1115
0793e4ed
SC
1116SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1117
c58b88df
PH
1118PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1119 fopen() in the content-scanning modules that did not already have it.
1120
e7ad8a65 1121
7982096b
PH
1122Exim version 4.51
1123-----------------
1124
1a46a8c5
PH
1125TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1126 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1127
2f079f46 1128TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1129
1130TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1131
1132PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1133 to test Sieve filters that use "vacation".
1134
1135PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1136 that changes the way the GnuTLS parameters are stored in the cache file.
1137 The new format can be generated externally. For backward compatibility,
1138 if the data in the cache doesn't make sense, Exim assumes it has read an
1139 old-format file, and it generates new data and writes a new file. This
1140 means that you can't go back to an older release without removing the
1141 file.
1142
1143PH/03 A redirect router that has both "unseen" and "one_time" set does not
1144 work if there are any delivery delays because "one_time" forces the
1145 parent to be marked "delivered", so its unseen clone is never tried
1146 again. For this reason, Exim now forbids the simultaneous setting of
1147 these two options.
1148
1149PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1150 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1151 entry if you want to know the details. The fix, however, neglected to
1152 consider the case when local delivery batching is involved. The test for
1153 "previously delivered" was not happening when checking to see if an
1154 address could be batched with a previous (undelivered) one; under
1155 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1156 address.
1a46a8c5
PH
1157
1158PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1159 in its include files, and this causes problems building Exim.
1160
1161PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1162 header_syntax) but Exim was just ignoring anything given after a slash.
1163 In particular, this caused confusion with an attempt to use "verify =
1164 reverse_host_lookup/defer_ok". An error is now given when options are
1165 supplied for verify items that do not have them. (Maybe reverse_host_
1166 lookup should have a defer_ok option, but that's a different point.)
1167
1168PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1169 defined by RFC 821) to 2048, because there were problems with some AUTH
1170 commands, and RFC 1869 says the size should be increased for extended
1171 SMTP commands that take arguments.
1172
1173PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1174 Finch).
1175
1176PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1177 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1178
49c2d5ea
PH
1179PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1180 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1181 whatever). Otherwise the password may appear in the log. Following change
1182 PH/42 below, there is no longer a chance of it appearing in a bounce
1183 message.
49c2d5ea 1184
bf759a8b
PH
1185PH/11 Installed exipick version 20050225.0 from John Jetmore.
1186
83364d30
PH
1187PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1188 of its addresses was ever tried. (Bugzilla bug #2.)
1189
7999bbd7
PH
1190PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1191 the result incorrectly in the debug output. (It correctly added a newline
1192 to what was transported.)
1193
7dbf77c9
PH
1194TF/01 Added $received_time.
1195
74e0617f
PH
1196PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1197 commented out examples of how to interface to a virus scanner and to
1198 SpamAssassin. Also added commented examples of av_scanner and
1199 spamd_address settings.
1200
2f079f46
PH
1201PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1202 and controls are allowed in which ACLs. There were a couple of minor
1203 errors. Some of the entries in the conditions table (which is a table of
1204 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1205 negation of where the condition IS allowed.
1206
8c841523
PH
1207PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1208
7766a4f0
PH
1209PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1210 header file does not have a version number, so I've had to invent a new
1211 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1212 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1213 radiusclient), but it was contributed by a Radius user.
1214
8b417f2c
PH
1215PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1216 files or directories, for OpenSSL.
1217
901f42cb
PH
1218PH/19 When an Exim process that is running as root has to create an Exim log
1219 file, it does so in a subprocess that runs as exim:exim so as to get the
1220 ownership right at creation (otherwise, other Exim processes might see
1221 the file with the wrong ownership). There was no test for failure of this
1222 fork() call, which would lead to the process getting stuck as it waited
1223 for a non-existent subprocess. Forks do occasionally fail when resources
1224 run out. I reviewed all the other calls to fork(); they all seem to check
1225 for failure.
1226
f9b9210e
PH
1227PH/20 When checking for unexpected SMTP input at connect time (before writing
1228 the banner), Exim was not dealing correctly with a non-positive return
1229 from the read() function. If the client had disconnected by this time,
1230 the result was a log entry for a synchronization error with an empty
1231 string after "input=" when read() returned zero. If read() returned -1
1232 (an event I could not check), uninitialized data bytes were printed.
1233 There were reports of junk text (parts of files, etc) appearing after
1234 "input=".
1235
54cdb463
PH
1236PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1237
cf00dad6
PH
1238PH/22 Added support for macro redefinition, and (re)definition in between
1239 driver and ACL definitions.
1240
acb1b346
PH
1241PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1242 forgetting to use the resulting value; it was using the unexpanded value.
1243
c5ddb310
PH
1244PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1245 hadn't been configured. The fix is from Juergen Kreileder, who
1246 understands it better than I do:
1247
1248 "Here's what I see happening with three configured cyrus_sasl
1249 authenticators configured (plain, login, cram-md5):
1250
1251 On startup auth_cyrus_sasl_init() gets called for each of these.
1252 This means three calls to sasl_listmech() without a specified mech_list.
1253 => SASL tests which mechs of all available mechs actually work
1254 => three warnings about OTP not working
1255 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1256
1257 With the patch, sasl_listmech() also gets called three times. But now
1258 SASL's mech_list option is set to the server_mech specified in the the
1259 authenticator. Or in other words, the answer from sasl_listmech()
1260 gets limited to just the mech you're testing for (which is different
1261 for each call.)
1262 => the return list contains just 'plain' or 'login', 'cram-md5' or
1263 nothing depending on the value of ob->server_mech.
1264
1265 I've just tested the patch: Authentication still works fine,
1266 unavailable mechs specified in the exim configuration are still
1267 caught, and the auth.log warnings about OTP are gone."
1268
31619da6
PH
1269PH/25 When debugging is enabled, the contents of the command line are added
1270 to the debugging output, even when log_selector=+arguments is not
1271 specified.
1272
bebaf0fc
PH
1273PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1274 answer is "GNU", and only if the return is "GNU/something" is the answer
1275 "Linux".
1276
475fe28a
PH
1277PH/27 $acl_verify_message is now set immediately after the failure of a
1278 verification in an ACL, and so is available in subsequent modifiers. In
1279 particular, the message can be preserved by coding like this:
1280
1281 warn !verify = sender
1282 set acl_m0 = $acl_verify_message
1283
1284 Previously, $acl_verify_message was set only while expanding "message"
1285 and "log_message" when a very denied access.
1286
7e8bec7a
PH
1287PH/28 Modified OS/os.c-Linux with
1288
1289 -#ifndef OS_LOAD_AVERAGE
1290 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1291
1292 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1293 nomenclature these days.)
1294
e4a89c47
PH
1295PH/29 Installed patch from the Sieve maintainer that adds the options
1296 sieve_useraddress and sieve_subaddress to the redirect router.
1297
5ca2a9a1
PH
1298PH/30 In these circumstances:
1299 . Two addresses routed to the same list of hosts;
1300 . First host does not offer TLS;
1301 . First host accepts first address;
1302 . First host gives temporary error to second address;
1303 . Second host offers TLS and a TLS session is established;
1304 . Second host accepts second address.
1305 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1306 and peerdn, if requested) that were in fact used only for the second
1307 address.
7e8bec7a 1308
c688b954
PH
1309PH/31 When doing a callout as part of verifying an address, Exim was not paying
1310 attention to any local part prefix or suffix that was matched by the
1311 router that accepted the address. It now behaves in the same way as it
1312 does for delivery: the affixes are removed from the local part unless
1313 rcpt_include_affixes is set on the transport.
1314
fed77020
PH
1315PH/32 Add the sender address, as F=<...>, to the log line when logging a
1316 timeout during the DATA phase of an incoming message.
1317
7fe1560f
PH
1318PH/33 Sieve envelope tests were broken for match types other than :is. I have
1319 applied a patch sanctioned by the Sieve maintainer.
c688b954 1320
ebb6e6d5
PH
1321PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1322 the uid or gid is negative. A case of a negative gid caused this to be
1323 noticed. The fix allows for either to be negative.
1324
9c4e8f60
PH
1325PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1326 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1327 overlooked.
1328
1329PH/36 The change PH/12 above was broken. Fixed it.
1330
d7174846
PH
1331PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1332 the grounds that routing the same address twice would always produce the
1333 same answer. This might have been true once, but it is certainly no
1334 longer true now. Routing a child address may depend on the previous
1335 routing that produced that child. Some complicated redirection strategies
1336 went wrong when messages had multiple recipients, and made Exim's
1337 behaviour dependent on the order in which the addresses were given.
1338
1339 I have moved the duplicate checking until after the routing is complete.
1340 Exim scans the addresses that are assigned to local and remote
1341 transports, and removes any duplicates. This means that more work will be
1342 done, as duplicates will always all be routed, but duplicates are
1343 presumably rare, so I don't expect this is of any significance.
1344
1345 For deliveries to pipes, files, and autoreplies, the duplicate checking
1346 still happens during the routing process, since they are not going to be
1347 routed further.
1348
cfe75fc3
PH
1349PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1350 It corrects a timeout issue with spamd. This is Ian's comment: "The
1351 background is that sometimes spamd either never reads data from a
1352 connection it has accepted, or it never writes response data. The exiscan
1353 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1354 blindly assumes that writes won't block so it may never time out."
1355
be22d70e
PH
1356PH/39 Allow G after quota size as well as K and M.
1357
0612b098
PH
1358PH/40 The value set for $authenticated_id in an authenticator may not contain
1359 binary zeroes or newlines because the value is written to log lines and
1360 to spool files. There was no check on this. Now the value is run through
1361 the string_printing() function so that such characters are converted to
1362 printable escape sequences.
1363
2e0c1448
PH
1364PH/41 $message_linecount is a new variable that contains the total number of
1365 lines in the message. Compare $body_linecount, which is the count for the
1366 body only.
1367
447d236c
PH
1368PH/42 Exim no longer gives details of delivery errors for specific addresses in
1369 bounce and delay warning messages, except in certain special cases, which
1370 are as follows:
1371
1372 (a) An SMTP error message from a remote host;
1373 (b) A message specified in a :fail: redirection;
1374 (c) A message specified in a "fail" command in a system filter;
1375 (d) A message specified in a FAIL return from the queryprogram router;
1376 (e) A message specified by the cannot_route_message router option.
1377
1378 In these cases only, Exim does include the error details in bounce and
1379 warning messages. There are also a few cases where bland messages such
1380 as "unrouteable address" or "local delivery error" are given.
1381
d20976dc
PH
1382PH/43 $value is now also set for the "else" part of a ${run expansion.
1383
f656d135
PH
1384PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1385 being worked on, but at least Exim now implements the latest version to
1386 play with."
1387
2e2a30b4
PH
1388PH/45 In a pipe transport, although a timeout while waiting for the pipe
1389 process to complete was treated as a delivery failure, a timeout while
1390 writing the message to the pipe was logged, but erroneously treated as a
1391 successful delivery. Such timeouts include transport filter timeouts. For
1392 consistency with the overall process timeout, these timeouts are now
1393 treated as errors, giving rise to delivery failures by default. However,
1394 there is now a new Boolean option for the pipe transport called
1395 timeout_defer, which, if set TRUE, converts the failures into defers for
1396 both kinds of timeout. A transport filter timeout is now identified in
1397 the log output.
1398
9176e9f0
PH
1399PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1400 systems where "make" and "gmake" are different, calling "gmake" at top
1401 level broke things. I've arranged for the value of $(MAKE) to be passed
1402 from the Makefile to this script so that it can call the same version of
1403 "make".
1404
7982096b 1405
bbe902f0
PH
1406A note about Exim versions 4.44 and 4.50
1407----------------------------------------
1408
1409Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1410changes of various kinds. As a consequence, a big documentation update was
1411needed. This delayed the release for rather longer than seemed good, especially
1412in the light of a couple of (minor) security issues. Therefore, the changes
1413that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1414release. So 4.44 and 4.50 are in effect two different branches that both start
1415from 4.43.
1416
1417I have left the 4.50 change log unchanged; it contains all the changes since
14184.43. The change log for 4.44 is below; many of its items are identical to
1419those for 4.50. This seems to be the most sensible way to preserve the
1420historical information.
1421
1422
f7b63901 1423Exim version 4.50
495ae4b0
PH
1424-----------------
1425
5fe762f6
PH
1426 1. Minor wording change to the doc/README.SIEVE file.
1427
139059f6 1428 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1429 computation of the current number of files was incorrect.
495ae4b0 1430
7086e875
PH
1431 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1432 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1433 place.
1434
35af9f61
PH
1435 4. Give more explanation in the error message when the command for a transport
1436 filter fails to execute.
1437
b668c215
PH
1438 5. There are several places where Exim runs a non-Exim command in a
1439 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1440 was being done only for the command run by the queryprogram router. It is
1441 now done for all such subprocesses. The other cases are: ${run, transport
1442 filters, and the commands run by the lmtp and pipe transports.
1443
a494b1e1
PH
1444 6. Added CONFIGURE_GROUP build-time option.
1445
1446 7. Some older OS have a limit of 256 on the maximum number of file
1447 descriptors. Exim was using setrlimit() to set 1000 as a large value
1448 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1449 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1450
c5fcb476
PH
1451 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1452 was an oversight, and furthermore, ever since the addition of extra
1453 controls (e.g. 4.43/32), the checks on when to allow different forms of
1454 "control" were broken. There should now be diagnostics for all cases when a
1455 control that does not make sense is encountered.
1456
69358f02
PH
1457 9. Added the /retain_sender option to "control=submission".
1458
5be20824
PH
145910. $recipients is now available in the predata ACL (oversight).
1460
eb2c0248
PH
146111. Tidy the search cache before the fork to do a delivery from a message
1462 received from the command line. Otherwise the child will trigger a lookup
1463 failure and thereby defer the delivery if it tries to use (for example) a
1464 cached ldap connection that the parent has called unbind on.
1465
2a3eea10
PH
146612. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1467 of $address_data from the recipient verification was clobbered by the
1468 sender verification.
1469
147013. The value of address_data from a sender verification is now available in
1471 $sender_address_data in subsequent conditions in the ACL statement.
1472
23c7ff99
PH
147314. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1474
4deaf07d
PH
147515. Added a new option "connect=<time>" to callout options, to set a different
1476 connection timeout.
1477
926e1192
PH
147816. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1479 was its contents. (It was OK if the option was not defined at all.)
1480
650edc6f
PH
148117. A "Completed" log line is now written for messages that are removed from
1482 the spool by the -Mrm option.
1483
2c7db3f5
PH
148418. New variables $sender_verify_failure and $recipient_verify_failure contain
1485 information about exactly what failed.
1486
3d235903
PH
148719. Added -dd to debug only the daemon process.
1488
7c7ad977
PH
148920. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1490 handles timeouts, both on the server side and network timeouts. Renamed the
1491 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1492
981756db
PH
149321. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1494 It is now set to "smtps".
1495
d4eb88df
PH
149622. $host_address is now set to the target address during the checking of
1497 ignore_target_hosts.
1498
149923. When checking ignore_target_hosts for an ipliteral router, no host name was
1500 being passed; this would have caused $sender_host_name to have been used if
1501 matching the list had actually called for a host name (not very likely,
1502 since this list is usually IP addresses). A host name is now passed as
1503 "[x.x.x.x]".
1504
7d468ab8
PH
150524. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1506 code that specifies a non-restarting handler (typically sigaction() in
1507 modern systems) in an attempt to fix a rare and obscure crash bug.
1508
150925. Narrowed the window for a race in the daemon that could cause it to ignore
1510 SIGCHLD signals. This is not a major problem, because they are used only to
1511 wake it up if nothing else does.
1512
62c0818f
PH
151326. A malformed maildirsize file could cause Exim to calculate negative values
1514 for the mailbox size or file count. Odd effects could occur as a result.
1515 The maildirsize information is now recalculated if the size or filecount
1516 end up negative.
1517
26034054
PH
151827. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1519 support for a long time. Removed HAVE_SYS_VFS_H.
1520
af66f652
PH
152128. Installed the latest version of exipick from John Jetmore.
1522
90af77f4
PH
152329. In an address list, if the pattern was not a regular expression, an empty
1524 subject address (from a bounce message) matched only if the pattern was an
1525 empty string. Non-empty patterns were not even tested. This was the wrong
1526 because it is perfectly reasonable to use an empty address as part of a
1527 database query. An empty address is now tested by patterns that are
1528 lookups. However, all the other forms of pattern expect the subject to
1529 contain a local part and a domain, and therefore, for them, an empty
1530 address still always fails if the pattern is not itself empty.
1531
d8ef3577
PH
153230. Exim went into a mad DNS loop when attempting to do a callout where the
1533 host was specified on an smtp transport, and looking it up yielded more
1534 than one IP address.
1535
5cb8cbc6
PH
153631. Re-factored the code for checking spool and log partition space into a
1537 function that finds that data and another that does the check. The former
1538 is then used to implement four new variables: $spool_space, $log_space,
1539 $spool_inodes, and $log_inodes.
1540
14702f5b
PH
154132. The RFC2047 encoding function was originally intended for short strings
1542 such as real names; it was not keeping to the 75-character limit for
1543 encoded words that the RFC imposes. It now respects the limit, and
1544 generates multiple encoded words if necessary. To be on the safe side, I
1545 have increased the buffer size for the ${rfc2047: expansion operator from
1546 1024 to 2048 bytes.
1547
063b1e99
PH
154833. It is now permitted to omit both strings after an "if" condition; if the
1549 condition is true, the result is "true". As before, when the second string
1550 is omitted, a false condition yields an empty string. This makes it less
1551 cumbersome to write custom ACL and router conditions.
1552
652e1b65
PH
155334. Failure to deliver a bounce message always caused it to be frozen, even if
1554 there was an errors_to setting on the router. The errors_to setting is now
1555 respected.
1556
6f0c9a4f
PH
155735. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1558 canonical form (fully expanded) before being placed in
1559 $sender_host_address.
1560
33397d19
PH
156136. The table in the code that translates DNS record types into text (T_A to
1562 "A" for instance) was missing entries for NS and CNAME. It is just possible
1563 that this could have caused confusion if both these types were looked up
1564 for the same domain, because the text type is used as part of Exim's
1565 per-process caching. But the chance of anyone hitting this buglet seems
1566 very small.
1567
7bb56e1f
PH
156837. The dnsdb lookup has been extended in a number of ways.
1569
1570 (1) There is a new type, "zns", which walks up the domain tree until it
1571 finds some nameserver records. It should be used with care.
1572
ea3bc19b
PH
1573 (2) There is a new type, "mxh", which is like "mx" except that it returns
1574 just the host names, not the priorities.
1575
1576 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1577 looked up. The behaviour when one of the lookups defers can be
1578 controlled by a keyword.
7bb56e1f 1579
ea3bc19b 1580 (4) It is now possible to specify the separator character for use when
7bb56e1f 1581 multiple records are returned.
33397d19 1582
0bcb2a0e
PH
158338. The dnslists ACL condition has been extended: it is now possible to supply
1584 a list of IP addresses and/or domains to be looked up in a particular DNS
1585 domain.
1586
2ac0e484
PH
158739. Added log_selector=+queue_time_overall.
1588
4e1fde53
PH
158940. When running the queue in the test harness, wait just a tad after forking a
1590 delivery process, to get repeatability of debugging output.
1591
de365ded
PH
159241. Include certificate and key file names in error message when GnuTLS fails
1593 to set them up, because the GnuTLS error message doesn't include the name
1594 of the failing file when there is a problem reading it.
1595
f05da2e8
PH
159642. Allow both -bf and -bF in the same test run.
1597
d6453af2
PH
159843. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1599
f7b63901
PH
160044. The "Exiscan patch" is now merged into the mainline Exim source.
1601
160245. Sometimes the final signoff response after QUIT could fail to get
1603 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1604 < 0 before doing a fflush(). This bug looks as though it goes back to the
1605 introduction of TLS in release 3.20, but "sometimes" must have been rare
1606 because the tests only now provoked it.
1607
a444213a
PH
160846. Reset the locale to "C" after calling embedded Perl, in case it was changed
1609 (this can affect the format of dates).
1610
0ec020ea
PH
161147. exim_tidydb, when checking for the continued existence of a message for
1612 which it has found a message-specific retry record, was not finding
1613 messages that were in split spool directories. Consequently, it was
1614 deleting retry records that should have stayed in existence.
1615
b1206957
PH
161648. Steve fixed some bugs in eximstats.
1617
161849. The SPA authentication driver was not abandoning authentication and moving
1619 on to the next authenticator when an expansion was forced to fail,
1620 contradicting the general specification for all authenticators. Instead it
1621 was generating a temporary error. It now behaves as specified.
1622
26dd5a95
PH
162350. The default ordering of permitted cipher suites for GnuTLS was pessimal
1624 (the order specifies the preference for clients). The order is now AES256,
1625 AES128, 3DES, ARCFOUR128.
1626
343b2385
PH
162751. Small patch to Sieve code - explicitly set From: when generating an
1628 autoreply.
1629
1c5466b9
PH
163052. Exim crashed if a remote delivery caused a very long error message to be
1631 recorded - for instance if somebody sent an entire SpamAssassin report back
1632 as a large number of 550 error lines. This bug was coincidentally fixed by
1633 increasing the size of one of Exim's internal buffers (big_buffer) that
1634 happened as part of the Exiscan merge. However, to be on the safe side, I
1635 have made the code more robust (and fixed the comments that describe what
1636 is going on).
1637
55ee9ee3
PH
163853. Now that there can be additional text after "Completed" in log lines (if
1639 the queue_time_overall log selector is set), a one-byte patch to exigrep
1640 was needed to allow it to recognize "Completed" as not the last thing in
1641 the line.
1642
d38f8232
PH
164354. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1644 patch that reportedly fixes this has been added. I am not expert enough to
1645 create a test for it. This is what the patch creator wrote:
1646
1647 "I found a little strange behaviour of ldap code when working with
1648 Windows 2003 AD Domain, where users was placed in more than one
1649 Organization Units. When I tried to give exim partial DN, the exit code
1650 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1651 But simultaneously result of request was absolutely normal ldap result,
1652 so I produce this patch..."
1653
3295e65b
PH
1654 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1655 REFERENCE, so I have modified the code to exclude the patch when that macro
1656 is not defined.
1657
7102e136
PH
165855. Some experimental protocols are using DNS PTR records for new purposes. The
1659 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1660 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1661 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1662 CAN-2005-0021
7102e136 1663
3ca0ba97
PH
166456. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1665
c2bcbe20
PH
166657. Double the size of the debug message buffer (to 2048) so that more of very
1667 long debug lines gets shown.
1668
18ce445d
PH
166958. The exicyclog utility now does better if the number of log files to keep
1670 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1671
1f5b4c3d
PH
167259. Two changes related to the smtp_active_hostname option:
1673
1674 (1) $smtp_active_hostname is now available as a variable.
1675 (2) The default for smtp_banner uses $smtp_active_hostname instead
1676 of $primary_hostname.
1677
b975ba52
PH
167860. The host_aton() function is supposed to be passed a string that is known
1679 to be a valid IP address. However, in the case of IPv6 addresses, it was
1680 not checking this. This is a hostage to fortune. Exim now panics and dies
1681 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1682 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1683 components; fortuitously, this particular loophole had already been fixed
1684 by change 4.50/55 above.
1685
1686 If there are any other similar loopholes, the new check in host_aton()
1687 itself should stop them being exploited. The report I received stated that
1688 data on the command line could provoke the exploit when Exim was running as
1689 exim, but did not say which command line option was involved. All I could
1690 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1691 running as the user.
ea3a6f44 1692 CAN-2005-0021
85b87bc2
PH
1693
169461. There was a buffer overflow vulnerability in the SPA authentication code
1695 (which came originally from the Samba project). I have added a test to the
1696 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1697 CAN-2005-0022
b975ba52 1698
17ffcae7
PH
169962. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1700 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1701
d95f9fdb
PH
170263. The daemon start-up calls getloadavg() while still root for those OS that
1703 need the first call to be done as root, but it missed one case: when
1704 deliver_queue_load_max is set with deliver_drop_privilege. This is
1705 necessary for the benefit of the queue runner, because there is no re-exec
1706 when deliver_drop_privilege is set.
1707
86b8287f
PH
170864. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1709 This has been fixed.
1710
60dc5e56
PH
171165. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1712 was in use, was not putting the data itself into the right store pool;
1713 consequently, it could be overwritten for a subsequent message in the same
1714 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1715 the caching.)
1716
533244af
PH
171766. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1718
a5a28604
PH
171967. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1720 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1721 the function were treating the return as a boolean value, which happened to
1722 work because 0=false and not-0=true, but is not correct code.
1723
7e634d24
PH
172468. The host_aton() function was not handling scoped IPv6 addresses (those
1725 with, for example, "%eth0" on the end) correctly.
1726
3e11c26b
PH
172769. Fixed some compiler warnings in acl.c for the bitmaps specified with
1728 negated items (that is, ~something) in unsigned ints. Some compilers
1729 apparently mutter when there is no cast.
1730
6729cf78
PH
173170. If an address verification called from an ACL failed, and did not produce a
1732 user-specific message (i.e. there was only a "system" message), nothing was
1733 put in $acl_verify_message. In this situation, it now puts the system
1734 message there.
1735
00f00ca5
PH
173671. Change 4.23/11 added synchronization checking at the start of an SMTP
1737 session; change 4.31/43 added the unwanted input to the log line - except
1738 that it did not do this in the start of session case. It now does.
1739
c9bdd01c
PH
174072. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1741 This is wrong and can cause the other end to generate a synchronization
1742 error if it is another Exim or anything else that does the synchronization
1743 check. A QUIT command is no longer sent after a timeout.
1744
d43194df
PH
174573. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1746 during host lookups.
1747
fe5b5d0b
PH
174874. The defer_ok option of callout verification was not working if it was used
1749 when verifying addresses in header lines, that is, for this case:
1750
1751 verify = header_sender/callout=defer_ok
1752
76a2d7ba
PH
175375. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1754 those file descriptors could be used for SMTP connections. If anything
1755 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1756 could be sent to the SMTP client, causing chaos. The daemon now opens
1757 stdin, stdout, and stderr to /dev/null when it puts itself into the
1758 background.
1759
176076. Arrange for output from Perl's "warn" command to be written to Exim's main
1761 log by default. The user can override this with suitable Perl magic.
1762
04f7d5b9
PH
176377. The use of log_message on a "discard" ACL verb, which is supposed to add to
1764 the log message when discard triggers, was not working for the DATA ACL or
1765 for the non-SMTP ACL.
1766
bc60667e
PH
176778. Error message wording change in sieve.c.
1768
bb6e88ff
PH
176979. If smtp_accept_max_per_host was set, the number of connections could be
1770 restricted to fewer than expected, because the daemon was trying to set up
1771 a new connection before checking whether the processes handling previous
1772 connections had finished. The check for completed processes is now done
1773 earlier. On busy systems, this bug wouldn't be noticed because something
1774 else would have woken the daemon, and it would have reaped the completed
1775 process earlier.
1776
1e70f85b
PH
177780. If a message was submitted locally by a user whose login name contained one
1778 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1779 It caused a spool format error. I have fixed the spool reading code. A
1780 related problem was that the "from" clause in the Received: line became
1781 illegal because of the space(s). It is now covered by ${quote_local_part.
1782
178381. Included the latest eximstats from Steve (adds average sizes to HTML Top
1784 tables).
1785
4e01f9d6
PH
178682. Updated OS/Makefile-AIX as per message from Mike Meredith.
1787
1ee1cef2
PH
178883. Patch from Sieve maintainer to fix unterminated string problem in
1789 "vacation" handling.
1790
6e2b4ccc
PH
179184. Some minor changes to the Linux configuration files to help with other
1792 OS variants using glibc.
1793
8e669ac1
PH
179485. One more patch for Sieve to update vacation handling to latest spec.
1795
495ae4b0 1796
bbe902f0
PH
1797----------------------------------------------------
1798See the note above about the 4.44 and 4.50 releases.
1799----------------------------------------------------
1800
1801
1802Exim version 4.44
1803-----------------
1804
1805 1. Change 4.43/35 introduced a bug that caused file counts to be
1806 incorrectly computed when quota_filecount was set in an appendfile
1807 transport
1808
1809 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1810 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1811 place.
1812
1813 3. Give more explanation in the error message when the command for a transport
1814 filter fails to execute.
1815
1816 4. There are several places where Exim runs a non-Exim command in a
1817 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1818 was being done only for the command run by the queryprogram router. It is
1819 now done for all such subprocesses. The other cases are: ${run, transport
1820 filters, and the commands run by the lmtp and pipe transports.
1821
1822 5. Some older OS have a limit of 256 on the maximum number of file
1823 descriptors. Exim was using setrlimit() to set 1000 as a large value
1824 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1825 systems. I've change it so that if it can't get 1000, it tries for 256.
1826
1827 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1828 was an oversight, and furthermore, ever since the addition of extra
1829 controls (e.g. 4.43/32), the checks on when to allow different forms of
1830 "control" were broken. There should now be diagnostics for all cases when a
1831 control that does not make sense is encountered.
1832
1833 7. $recipients is now available in the predata ACL (oversight).
1834
1835 8. Tidy the search cache before the fork to do a delivery from a message
1836 received from the command line. Otherwise the child will trigger a lookup
1837 failure and thereby defer the delivery if it tries to use (for example) a
1838 cached ldap connection that the parent has called unbind on.
1839
1840 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1841 of $address_data from the recipient verification was clobbered by the
1842 sender verification.
1843
184410. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1845 was its contents. (It was OK if the option was not defined at all.)
1846
184711. A "Completed" log line is now written for messages that are removed from
1848 the spool by the -Mrm option.
1849
185012. $host_address is now set to the target address during the checking of
1851 ignore_target_hosts.
1852
185313. When checking ignore_target_hosts for an ipliteral router, no host name was
1854 being passed; this would have caused $sender_host_name to have been used if
1855 matching the list had actually called for a host name (not very likely,
1856 since this list is usually IP addresses). A host name is now passed as
1857 "[x.x.x.x]".
1858
185914. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1860 code that specifies a non-restarting handler (typically sigaction() in
1861 modern systems) in an attempt to fix a rare and obscure crash bug.
1862
186315. Narrowed the window for a race in the daemon that could cause it to ignore
1864 SIGCHLD signals. This is not a major problem, because they are used only to
1865 wake it up if nothing else does.
1866
186716. A malformed maildirsize file could cause Exim to calculate negative values
1868 for the mailbox size or file count. Odd effects could occur as a result.
1869 The maildirsize information is now recalculated if the size or filecount
1870 end up negative.
1871
187217. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1873 support for a long time. Removed HAVE_SYS_VFS_H.
1874
ea3a6f44 187518. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1876
187719. Allow an empty sender to be matched against a lookup in an address list.
1878 Previously the only cases considered were a regular expression, or an
1879 empty pattern.
1880
188120. Exim went into a mad DNS lookup loop when doing a callout where the
1882 host was specified on the transport, if the DNS lookup yielded more than
1883 one IP address.
1884
ea3a6f44
NM
188521. The RFC2047 encoding function was originally intended for short strings
1886 such as real names; it was not keeping to the 75-character limit for
1887 encoded words that the RFC imposes. It now respects the limit, and
1888 generates multiple encoded words if necessary. To be on the safe side, I
1889 have increased the buffer size for the ${rfc2047: expansion operator from
1890 1024 to 2048 bytes.
bbe902f0 1891
ea3a6f44
NM
189222. Failure to deliver a bounce message always caused it to be frozen, even if
1893 there was an errors_to setting on the router. The errors_to setting is now
1894 respected.
bbe902f0
PH
1895
189623. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1897 canonical form (fully expanded) before being placed in
1898 $sender_host_address.
1899
190024. Updated eximstats to version 1.33
1901
ea3a6f44
NM
190225. Include certificate and key file names in error message when GnuTLS fails
1903 to set them up, because the GnuTLS error message doesn't include the name
1904 of the failing file when there is a problem reading it.
bbe902f0
PH
1905
190626. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1907 As per change 25.
bbe902f0 1908
ea3a6f44
NM
190927. Reset the locale to "C" after calling embedded Perl, in case it was changed
1910 (this can affect the format of dates).
bbe902f0 1911
ea3a6f44
NM
191228. exim_tidydb, when checking for the continued existence of a message for
1913 which it has found a message-specific retry record, was not finding
1914 messages that were in split spool directories. Consequently, it was
1915 deleting retry records that should have stayed in existence.
bbe902f0
PH
1916
191729. eximstats updated to version 1.35
1918 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1919 1.35 - bugfix such that pie charts by volume are generated correctly
1920
ea3a6f44
NM
192130. The SPA authentication driver was not abandoning authentication and moving
1922 on to the next authenticator when an expansion was forced to fail,
1923 contradicting the general specification for all authenticators. Instead it
1924 was generating a temporary error. It now behaves as specified.
bbe902f0 1925
ea3a6f44
NM
192631. The default ordering of permitted cipher suites for GnuTLS was pessimal
1927 (the order specifies the preference for clients). The order is now AES256,
1928 AES128, 3DES, ARCFOUR128.
bbe902f0 1929
ea3a6f44
NM
193031. Small patch to Sieve code - explicitly set From: when generating an
1931 autoreply.
bbe902f0 1932
ea3a6f44
NM
193332. Exim crashed if a remote delivery caused a very long error message to be
1934 recorded - for instance if somebody sent an entire SpamAssassin report back
1935 as a large number of 550 error lines. This bug was coincidentally fixed by
1936 increasing the size of one of Exim's internal buffers (big_buffer) that
1937 happened as part of the Exiscan merge. However, to be on the safe side, I
1938 have made the code more robust (and fixed the comments that describe what
1939 is going on).
bbe902f0 1940
ea3a6f44
NM
194133. Some experimental protocols are using DNS PTR records for new purposes. The
1942 keys for these records are domain names, not reversed IP addresses. The
1943 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1944 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1945 CAN-2005-0021
1946
ea3a6f44
NM
194734. The host_aton() function is supposed to be passed a string that is known
1948 to be a valid IP address. However, in the case of IPv6 addresses, it was
1949 not checking this. This is a hostage to fortune. Exim now panics and dies
1950 if the condition is not met. A case was found where this could be provoked
1951 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1952 components; fortuitously, this particular loophole had already been fixed
1953 by change 4.50/55 or 4.44/33 above.
1954
1955 If there are any other similar loopholes, the new check in host_aton()
1956 itself should stop them being exploited. The report I received stated that
1957 data on the command line could provoke the exploit when Exim was running as
1958 exim, but did not say which command line option was involved. All I could
1959 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1960 running as the user.
bbe902f0
PH
1961 CAN-2005-0021
1962
ea3a6f44
NM
196335. There was a buffer overflow vulnerability in the SPA authentication code
1964 (which came originally from the Samba project). I have added a test to the
1965 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1966 CAN-2005-0022
1967
ea3a6f44
NM
196836. The daemon start-up calls getloadavg() while still root for those OS that
1969 need the first call to be done as root, but it missed one case: when
1970 deliver_queue_load_max is set with deliver_drop_privilege. This is
1971 necessary for the benefit of the queue runner, because there is no re-exec
1972 when deliver_drop_privilege is set.
bbe902f0 1973
ea3a6f44
NM
197437. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1975 was in use, was not putting the data itself into the right store pool;
1976 consequently, it could be overwritten for a subsequent message in the same
1977 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1978 the caching.)
bbe902f0 1979
ea3a6f44
NM
198038. Sometimes the final signoff response after QUIT could fail to get
1981 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1982 < 0 before doing a fflush(). This bug looks as though it goes back to the
1983 introduction of TLS in release 3.20, but "sometimes" must have been rare
1984 because the tests only now provoked it.
bbe902f0
PH
1985
1986
495ae4b0
PH
1987Exim version 4.43
1988-----------------
1989
1990 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1991 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1992 Now it returns an integer. A number of calls were still expecting a T/F
1993 return. Fortuitously, in all cases, the tests worked in OK situations,
1994 which is the norm. However, things would have gone wrong on any write
1995 failures on the smtp file descriptor. This function is used when sending
1996 messages over SMTP and also when doing verify callouts.
1997
1998 2. When Exim is called to do synchronous delivery of a locally submitted
1999 message (the -odf or -odi options), it no longer closes stderr before doing
2000 the delivery.
2001
2002 3. Implemented the mua_wrapper option.
2003
2004 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2005
2006 5. Implemented the functions header_remove(), header_testname(),
2007 header_add_at_position(), and receive_remove_recipient(), and exported them
2008 to local_scan().
2009
2010 6. If an ACL "warn" statement specified the addition of headers, Exim already
2011 inserted X-ACL-Warn: at the start if there was no header name. However, it
2012 was not making this test for the second and subsequent header lines if
2013 there were newlines in the string. This meant that an invalid header could
2014 be inserted if Exim was badly configured.
2015
2016 7. Allow an ACL "warn" statement to add header lines at the start or after all
2017 the Received: headers, as well as at the end.
2018
2019 8. Added the rcpt_4xx retry error code.
2020
2021 9. Added postmaster_mailfrom=xxx to callout verification option.
2022
202310. Added mailfrom=xxxx to the callout verification option, for verify=
2024 header_sender only.
2025
202611. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2027 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2028
202912. Inserted some casts to stop certain compilers warning when using pointer
2030 differences as field lengths or precisions in printf-type calls (mostly
2031 affecting debugging statements).
2032
203313. Added optional readline() support for -be (dynamically loaded).
2034
203514. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2036 same clock tick as a message's arrival, so that its received time was the
2037 same as the "first fail" time on the retry record, and that message
2038 remained on the queue past the ultimate address timeout, every queue runner
2039 would try a delivery (because it was past the ultimate address timeout) but
2040 after another failure, the ultimate address timeout, which should have then
2041 bounced the address, did not kick in. This was a "< instead of <=" error;
2042 in most cases the first failure would have been in the next clock tick
2043 after the received time, and all would be well.
2044
204515. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2046 being recognized when the domain list was tested by the match_domain
2047 condition in an expansion string.
2048
204916. Added the ${str2b64: operator.
2050
205117. Exim was always calling setrlimit() to set a large limit for the number of
2052 processes, without checking whether the existing limit was already
2053 adequate. (It did check for the limit on file descriptors.) Furthermore,
2054 errors from getrlimit() and setrlimit() were being ignored. Now they are
2055 logged to the main and panic logs, but Exim does carry on, to try to do its
2056 job under whatever limits there are.
2057
205818. Imported PCRE 5.0.
2059
206019. Trivial typo in log message " temporarily refused connection" (the leading
2061 space).
2062
206320. If the log selector return_path_on_delivery was set and an address was
2064 redirected to /dev/null, the delivery process crashed because it assumed
2065 that a return path would always be set for a "successful" delivery. In this
2066 case, the whole delivery is bypassed as an optimization, and therefore no
2067 return path is set.
2068
206921. Internal re-arrangement: the function for sending a challenge and reading
2070 a response while authentication was assuming a zero-terminated challenge
2071 string. It's now changed to take a pointer and a length, to allow for
2072 binary data in such strings.
2073
207422. Added the cyrus_sasl authenticator (code supplied by MBM).
2075
207623. Exim was not respecting finduser_retries when seeking the login of the
2077 uid under which it was called; it was always trying 10 times. (The default
2078 setting of finduser_retries is zero.) Also, it was sleeping after the final
2079 failure, which is pointless.
2080
208124. Implemented tls_on_connect_ports.
2082
208325. Implemented acl_smtp_predata.
2084
208526. If the domain in control=submission is set empty, Exim assumes that the
2086 authenticated id is a complete email address when it generates From: or
2087 Sender: header lines.
2088
208927. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2090 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2091 chown and chgrp in /bin and hostname in /usr/bin.
2092
209328. Exim was keeping the "process log" file open after each use, just as it
2094 does for the main log. This opens the possibility of it remaining open for
2095 long periods when the USR1 signal hits a daemon. Occasional processlog
2096 errors were reported, that could have been caused by this. Anyway, it seems
2097 much more sensible not to leave this file open at all, so that is what now
2098 happens.
2099
210029. The long-running daemon process does not normally write to the log once it
2101 has entered its main loop, and it closes the log before doing so. This is
2102 so that log files can straightforwardly be renamed and moved. However,
2103 there are a couple of unusual error situations where the daemon does write
2104 log entries, and I had neglected to close the log afterwards.
2105
210630. The text of an SMTP error response that was received during a remote
2107 delivery was being truncated at 512 bytes. This is too short for some of
2108 the long messages that one sometimes sees. I've increased the limit to
2109 1024.
2110
211131. It is now possible to make retry rules that apply only when a message has a
2112 specific sender, in particular, an empty sender.
2113
211432. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2115 it possible to be selective about when SMTP synchronization is enforced.
2116
211733. Added "control = caseful_local_part" and "control = "caselower_local_part".
2118
211932. Implemented hosts_connection_nolog.
2120
212133. Added an ACL for QUIT.
2122
212334. Setting "delay_warning=" to disable warnings was not working; it gave a
2124 syntax error.
2125
212635. Added mailbox_size and mailbox_filecount to appendfile.
2127
212836. Added control = no_multiline_responses to ACLs.
2129
213037. There was a bug in the logic of the code that waits for the clock to tick
2131 in the case where the clock went backwards by a substantial amount such
2132 that the microsecond fraction of "now" was more than the microsecond
2133 fraction of "then" (but the whole seconds number was less).
2134
213538. Added support for the libradius Radius client library this is found on
2136 FreeBSD (previously only the radiusclient library was supported).
2137
2138
2139Exim version 4.42
2140-----------------
2141
2142 1. When certain lookups returned multiple values in the form name=value, the
2143 quoting of the values was not always being done properly. Specifically:
2144 (a) If the value started with a double quote, but contained no whitespace,
2145 it was not quoted.
2146 (b) If the value contained whitespace other than a space character (i.e.
2147 tabs or newlines or carriage returns) it was not quoted.
2148 This fix has been applied to the mysql and pgsql lookups by writing a
2149 separate quoting function and calling it from the lookup code. The fix
2150 should probably also be applied to nisplus, ibase and oracle lookups, but
2151 since I cannot test any of those, I have not disturbed their existing code.
2152
2153 2. A hit in the callout cache for a specific address caused a log line with no
2154 reason for rejecting RCPT. Now it says "Previous (cached) callout
2155 verification failure".
2156
2157 3. There was an off-by-one bug in the queryprogram router. An over-long
2158 return line was truncated at 256 instead of 255 characters, thereby
2159 overflowing its buffer with the terminating zero. As well as fixing this, I
2160 have increased the buffer size to 1024 (and made a note to document this).
2161
2162 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2163 when Exim is waiting for an SMTP response from a remote server, Exim
2164 restarts its select() call on the socket, thereby resetting its timeout.
2165 This is not a problem when such interrupts are rare. Somebody set up a cron
2166 job to run exiwhat every 2 minutes, which is less than the normal select()
2167 timeout (5 or 10 minutes). This meant that the select() timeout never
2168 kicked in because it was always reset. I have fixed this by comparing the
2169 time when an interrupt arrives with the time at the start of the first call
2170 to select(). If more time than the timeout has elapsed, the interrupt is
2171 treated as a timeout.
2172
2173 5. Some internal re-factoring in preparation for the addition of Sieve
2174 extensions (by MH). In particular, the "personal" test is moved to a
2175 separate function, and given an option for scanning Cc: and Bcc: (which is
2176 not set for Exim filters).
2177
2178 6. When Exim created an email address using the login of the caller as the
2179 local part (e.g. when creating a From: or Sender: header line), it was not
2180 quoting the local part when it contained special characters such as @.
2181
2182 7. Installed new OpenBSD configuration files.
2183
2184 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2185 try to make them clearer.
2186
2187 9. Callout options, other than the timeout value, were being ignored when
2188 verifying sender addresses in header lines. For example, when using
2189
2190 verify = header_sender/callout=no_cache
2191
2192 the cache was (incorrectly) being used.
2193
219410. Added a missing instance of ${EXE} to the exim_install script; this affects
2195 only the Cygwin environment.
2196
219711. When return_path_on_delivery was set as a log selector, if different remote
2198 addresses in the same message used different return paths and parallel
2199 remote delivery occurred, the wrong values would sometimes be logged.
2200 (Whenever a remote delivery process finished, the return path value from
2201 the most recently started remote delivery process was logged.)
2202
220312. RFC 3848 specifies standard names for the "with" phrase in Received: header
2204 lines when AUTH and/or TLS are in use. This is the "received protocol"
2205 field. Exim used to use "asmtp" for authenticated SMTP, without any
2206 indication (in the protocol name) for TLS use. Now it follows the RFC and
2207 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2208 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2209 names appear in log lines as well as in Received: header lines.
2210
221113. Installed MH's patches for Sieve to add the "copy" and "vacation"
2212 extensions, and comparison tests, and to fix some bugs.
2213
221414. Changes to the "personal" filter test:
2215
2216 (1) The test was buggy in that it was just doing the equivalent of
2217 "contains" tests on header lines. For example, if a user's address was
2218 anne@some.where, the "personal" test would incorrectly be true for
2219
2220 To: susanne@some.where
2221
2222 This test is now done by extracting each address from the header in turn,
2223 and checking the entire address. Other tests that are part of "personal"
2224 are now done using regular expressions (for example, to check local parts
2225 of addresses in From: header lines).
2226
2227 (2) The list of non-personal local parts in From: addresses has been
2228 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2229 taken from the Sieve specification recommendations.
2230
2231 (3) If the message contains any header line starting with "List-" it is
2232 treated as non-personal.
2233
2234 (4) The test for "circular" in the Subject: header line has been removed
2235 because it now seems ill-conceived.
2236
223715. Minor typos in src/EDITME comments corrected.
2238
223916. Installed latest exipick from John Jetmore.
2240
224117. If headers_add on a router specified a text string that was too long for
2242 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2243 of string_sprintf() is now avoided.
2244
224518. $message_body_size was not set (it was always zero) when running the DATA
2246 ACL and the local_scan() function.
2247
224819. For the "mail" command in an Exim filter, no default was being set for
2249 the once_repeat time, causing a random time value to be used if "once" was
2250 specified. (If the value happened to be <= 0, no repeat happened.) The
2251 default is now 0s, meaning "never repeat". The "vacation" command was OK
2252 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2253 (I found it when inspecting the code).
2254
225520. There is now an overall timeout for performing a callout verification. It
2256 defaults to 4 times the callout timeout, which applies to individual SMTP
2257 commands during the callout. The overall timeout applies when there is more
2258 than one host that can be tried. The timeout is checked before trying the
2259 next host. This prevents very long delays if there are a large number of
2260 hosts and all are timing out (e.g. when the network connections are timing
2261 out). The value of the overall timeout can be changed by specifying an
2262 additional sub-option for "callout", called "maxwait". For example:
2263
2264 verify = sender/callout=5s,maxwait=20s
2265
226621. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2267 to the end before writing, but this should make it even safer).
2268
226922. Exim was forgetting that it had advertised PIPELINING for the second and
2270 subsequent messages on an SMTP connection. It was also not resetting its
2271 memory on STARTTLS and an internal HELO.
2272
227323. When Exim logs an SMTP synchronization error within a session, it now
2274 records whether PIPELINING has been advertised or not.
2275
227624. Added 3 instances of "(long int)" casts to time_t variables that were being
2277 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2278 rather than long int.
2279
228025. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2281
228226. Added the never_mail option to autoreply.
2283
2284
2285Exim version 4.41
2286-----------------
2287
2288 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2289 crash if the getsockname() call failed; this can happen if a connection is
2290 closed very soon after it is established. The problem was simply in the
2291 order in which certain operations were done, causing Exim to try to write
2292 to the SMTP stream before it had set up the file descriptor. The bug has
2293 been fixed by making things happen in the correct order.
2294
2295
2296Exim version 4.40
2297-----------------
2298
2299 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2300 before the connection was closed, thus losing the rejection response.
2301
2302 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2303 some early Solaris releases, but causes trouble in current releases where
2304 socklen_t is defined.
2305
2306 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2307 always exist.
2308
2309 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2310 configured.
2311
2312 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2313 that releasing the top of it at the end releases what was used for sub-
2314 expansions (unless the block got too big). However, discard this block if
2315 the first thing is a variable or header, so that we can use its block when
2316 it is dynamic (useful for very large $message_headers, for example).
2317
2318 6. Lookups now cache *every* query, not just the most recent. A new, separate
2319 store pool is used for this. It can be recovered when all lookup caches are
2320 flushed. Lookups now release memory at the end of their result strings.
2321 This has involved some general refactoring of the lookup sources.
2322
2323 7. Some code has been added to the store_xxx() functions to reduce the amount
2324 of flapping under certain conditions.
2325
2326 8. log_incoming_interface used to affect only the <= reception log lines. Now
2327 it causes the local interface and port to be added to several more SMTP log
2328 lines, for example "SMTP connection from", and rejection lines.
2329
2330 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2331
233210. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2333
233411. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2335 could be overwritten at the end of the current message (or the start of a
2336 new message if it was set in a HELO ACL). The value is now preserved for
2337 the duration of the SMTP connection.
2338
233912. If a transport had a headers_rewrite setting, and a matching header line
2340 contained an unqualified address, that address was qualified, even if it
2341 did not match any rewriting rules. The underlying bug was that the values
2342 of the flags that permit the existence of unqualified sender and recipient
2343 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2344 non-local messages, and by -bnq for local messages) were not being
2345 preserved with the message after it was received.
2346
234713. When Exim was logging an SMTP synchronization error, it could sometimes log
2348 "next input=" as part of the text comprising the host identity instead of
2349 the correct text. The code was using the same buffer for two different
2350 strings. However, depending on which order the printing function evaluated
2351 its arguments, the bug did not always show up. Under Linux, for example, my
2352 test suite worked just fine.
2353
235414. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2355 doesn't work with some older versions of Perl. It has been changed to "my",
2356 which in any case is probably the better facility to use.
2357
235815. A really picky compiler found some instances of statements for creating
2359 error messages that either had too many or two few arguments for the format
2360 string.
2361
236216. The size of the buffer for calls to the DNS resolver has been increased
2363 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2364 for addresses that have a lot of PTR records. This alleviates a problem; it
2365 does not fully solve it.
2366
236717. A dnsdb lookup for PTR records that receives more data than will fit in the
2368 buffer now truncates the list and logs the incident, which is the same
2369 action as happens when Exim is looking up a host name and its aliases.
2370 Previously in this situation something unpredictable would happen;
2371 sometimes it was "internal error: store_reset failed".
2372
237318. If a server dropped the connection unexpectedly when an Exim client was
2374 using GnuTLS and trying to read a response, the client delivery process
2375 crashed while trying to generate an error log message.
2376
237719. If a "warn" verb in an ACL added multiple headers to a message in a single
2378 string, for example:
2379
2380 warn message = H1: something\nH2: something
2381
2382 the text was added as a single header line from Exim's point of view
2383 though it ended up OK in the delivered message. However, searching for the
2384 second and subsequent header lines using $h_h2: did not work. This has been
2385 fixed. Similarly, if a system filter added multiple headers in this way,
2386 the routers could not see them.
2387
238820. Expanded the error message when iplsearch is called with an invalid key to
2389 suggest using net-iplsearch in a host list.
2390
239121. When running tests using -bh, any delays imposed by "delay" modifiers in
2392 ACLs are no longer actually imposed (and a message to that effect is
2393 output).
2394
239522. If a "gecos" field in a passwd entry contained escaped characters, in
2396 particular, if it contained a \" sequence, Exim got it wrong when building
2397 a From: or a Sender: header from that name. A second bug also caused
2398 incorrect handling when an unquoted " was present following a character
2399 that needed quoting.
2400
240123. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2402 was not being matched caselessly.
2403
240424. Arranged for all hyphens in the exim.8 source to be escaped with
2405 backslashes.
2406
240725. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2408 properly. Recipient callout cache records were still being keyed to include
2409 the sender, even when use_sender was set false. This led to far more
2410 callouts that were necessary. The sender is no longer included in the key
2411 when use_sender is false.
2412
241326. Added "control = submission" modifier to ACLs.
2414
241527. Added the ${base62d: operator to decode base 62 numbers.
2416
241728. dnsdb lookups can now access SRV records.
2418
241929. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2420 the configuration file.
2421
242230. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2423 (-v) mode. This makes the output for a verbose queue run more intelligible.
2424
242531. Added a use_postmaster feature to recipient callouts.
2426
242732. Added the $body_zerocount variable, containing the number of binary zero
2428 bytes in the message body.
2429
243033. The time of last modification of the "new" subdirectory is now used as the
2431 "mailbox time last read" when there is a quota error for a maildir
2432 delivery.
2433
243434. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2435
243635. Added +ignore_unknown as a special item in host lists.
2437
243836. Code for decoding IPv6 addresses in host lists is now included, even if
2439 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2440 address was recognized as an IP address, but was then not correctly decoded
2441 into binary, causing unexpected and incorrect effects when compared with
2442 another IP address.
2443
2444
2445Exim version 4.34
2446-----------------
2447
2448 1. Very minor rewording of debugging text in manualroute to say "list of
2449 hosts" instead of "hostlist".
2450
2451 2. If verify=header_syntax was set, and a header line with an unqualified
2452 address (no domain) and a large number of spaces between the end of the
2453 name and the colon was received, the reception process suffered a buffer
2454 overflow, and (when I tested it) crashed. This was caused by some obsolete
2455 code that should have been removed. The fix is to remove it!
2456
2457 3. When running in the test harness, delay a bit after writing a bounce
2458 message to get a bit more predictability in the log output.
2459
2460 4. Added a call to search_tidyup() just before forking a reception process. In
2461 theory, someone could use a lookup in the expansion of smtp_accept_max_
2462 per_host which, without the tidyup, could leave open a database connection.
2463
2464 5. Added the variables $recipient_data and $sender_data which get set from a
2465 lookup success in an ACL "recipients" or "senders" condition, or a router
2466 "senders" option, similar to $domain_data and $local_part_data.
2467
2468 6. Moved the writing of debug_print from before to after the "senders" test
2469 for routers.
2470
2471 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2472 problems for message scanning, either using a data ACL, or using
2473 local_scan() because the Received: header was not generated till after they
2474 were called (in order to set the time as the time of reception completion).
2475 I have revised the way this works. The header is now generated after the
2476 body is received, but before the ACL or local_scan() are called. After they
2477 are run, the timestamp in the header is updated.
2478
2479
2480Exim version 4.33
2481-----------------
2482
2483 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2484 before starting a queue runner without re-exec. This happened only when
2485 deliver_drop_privilege was set or when the Exim user was set to root. The
2486 effect of the bug was that timeouts during subsequent deliveries caused
2487 crashes instead of being properly handled. The handler is now left at its
2488 default (and expected) setting.
2489
2490 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2491 message, again when deliver_drop_privilege is set or Exim is run as root.
2492 The bug described in (1) was not present in this case, but the tidying up
2493 of the other signals was missing. I have made the two cases consistent.
2494
2495 3. The ignore_target_hosts setting on a manualroute router was being ignored
2496 for hosts that were looked up using the /MX notation.
2497
2498 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2499 in domain lists.
2500
2501 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2502 operated on the sender address. After changing the $sender_address to <>
2503 for the sender address verify, Exim was re-instated it as the original
2504 (before rewriting) address, but remembering that it had rewritten it, so it
2505 wasn't rewriting it again. This bug also had the effect of breaking the
2506 sender address verification caching when the sender address was rewritten.
2507
2508 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2509 This has been changed so that if the ip literal address matches
2510 ignore_target_hosts, the router declines.
2511
2512 7. Added expansion conditions match_domain, match_address, and match_local_
2513 part (NOT match_host).
2514
2515 8. The placeholder for the Received: header didn't have a length field set.
2516
2517 9. Added code to Exim itself and to exim_lock to test for a specific race
2518 condition that could lead to file corruption when using MBX delivery. The
2519 issue is with the lockfile that is created in /tmp. If this file is removed
2520 after a process has opened it but before that process has acquired a lock,
2521 there is the potential for a second process to recreate the file and also
2522 acquire a lock. This could lead to two Exim processes writing to the file
2523 at the same time. The added code performs the same test as UW imapd; it
2524 checks after acquiring the lock that its file descriptor still refers to
2525 the same named file.
2526
252710. The buffer for building added header lines was of fixed size, 8192 bytes.
2528 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2529 when Exim is built.
2530
253111. Added the smtp_active_hostname option. If used, this will typically be made
2532 to depend on the incoming interface address. Because $interface_address is
2533 not set up until the daemon has forked a reception process, error responses
2534 that can happen earlier (such as "too many connections") no longer contain
2535 a host name.
2536
253712. If an expansion in a condition on a "warn" statement fails because a lookup
2538 defers, the "warn" statement is abandoned, and the next ACL statement is
2539 processed. Previously this caused the whole ACL to be aborted.
2540
254113. Added the iplsearch lookup type.
2542
254314. Added ident_timeout as a log selector.
2544
254515. Added tls_certificate_verified as a log selector.
2546
254716. Added a global option tls_require_ciphers (compare the smtp transport
2548 option of the same name). This controls incoming TLS connections.
2549
255017. I finally figured out how to make tls_require_ciphers do a similar thing
2551 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2552 before starting the TLS session.
2553
255418. Tabs are now shown as \t in -bP output.
2555
255619. If the log selector return_path_on_delivery was set, Exim crashed when
2557 bouncing a message because it had too many Received: header lines.
2558
255920. If two routers both had headers_remove settings, and the first one included
2560 a superfluous trailing colon, the final name in the first list and the
2561 first name in the second list were incorrectly joined into one item (with a
2562 colon in the middle).
2563
2564
2565Exim version 4.32
2566-----------------
2567
2568 1. Added -C and -D options to the exinext utility, mainly to make it easier
2569 to include in the automated testing, but these could be helpful when
2570 multiple configurations are in use.
2571
2572 2. The exinext utility was not formatting the output nicely when there was
2573 an alternate port involved in the retry record key, nor when there was a
2574 message id as well (for retries that were specific to a specific message
2575 and a specific host). It was also confused by IPv6 addresses, because of
2576 the additional colons they contain. I have fixed the IPv4 problem, and
2577 patched it up to do a reasonable job for IPv6.
2578
2579 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2580 delivery, the log line now contains "pipelined" if PIPELINING was used.
2581
2582 4. An SMTP transport process used to panic and die if the bind() call to set
2583 an explicit outgoing interface failed. This has been changed; it is now
2584 treated in the same way as a connect() failure.
2585
2586 5. A reference to $sender_host_name in the part of a conditional expansion
2587 that was being skipped was still causing a DNS lookup. This no longer
2588 occurs.
2589
2590 6. The def: expansion condition was not recognizing references to header lines
2591 that used bh_ and bheader_.
2592
2593 7. Added the _cache feature to named lists.
2594
2595 8. The code for checking quota_filecount in the appendfile transport was
2596 allowing one more file than it should have been.
2597
2598 9. For compatibility with Sendmail, the command line option
2599
2600 -prval:sval
2601
2602 is equivalent to
2603
2604 -oMr rval -oMs sval
2605
2606 and sets the incoming protocol and host name (for trusted callers). The
2607 host name and its colon can be omitted when only the protocol is to be set.
2608 Note the Exim already has two private options, -pd and -ps, that refer to
2609 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2610 "s", but I don't think that's a major issue.
2611
261210. A number of refactoring changes to the code, none of which should affect
2613 Exim's behaviour:
2614
2615 (a) The number of logging options was getting close to filling up the
2616 32-bit word that was used as a bit map. I have split them into two classes:
2617 those that are passed in the argument to log_write(), and those that are
2618 only ever tested independently outside of that function. These are now in
2619 separate 32-bit words, so there is plenty of room for expansion again.
2620 There is no change in the user interface or the logging behaviour.
2621
2622 (b) When building, for example, log lines, the code previously used a
2623 macro that called string_cat() twice, in order to add two strings. This is
2624 not really sufficiently general. Furthermore, there was one instance where
2625 it was actually wrong because one of the argument was used twice, and in
2626 one call a function was used. (As it happened, calling the function twice
2627 did not affect the overall behaviour.) The macro has been replaced by a
2628 function that can join an arbitrary number of extra strings onto a growing
2629 string.
2630
2631 (c) The code for expansion conditions now uses a table and a binary chop
2632 instead of a serial search (which was left over from when there were very
2633 few conditions). Also, it now recognizes conditions like "pam" even when
2634 the relevant support is not compiled in: a suitably worded error message is
2635 given if an attempt is made to use such a condition.
2636
263711. Added ${time_interval:xxxxx}.
2638
263912. A bug was causing one of the ddress fields not to be passed back correctly
2640 from remote delivery subprocesses. The field in question was not being
2641 subsequently used, so this caused to problems in practice.
2642
264313. Added new log selectors queue_time and deliver_time.
2644
264514. Might have fixed a bug in maildirsizefile handling that threw up
2646 "unexpected character" debug warnings, and recalculated the data
2647 unnecessarily. In any case, I expanded the warning message to give more
2648 information.
2649
265015. Added the message "Restricted characters in address" to the statements in
2651 the default ACL that block characters like @ and % in local parts.
2652
265316. Change 71 for release 4.31 proved to be much less benign that I imagined.
2654 Three changes have been made:
2655
2656 (a) There was a serious bug; a negative response to MAIL caused the whole
2657 recipient domain to be cached as invalid, thereby blocking all messages
2658 to all local parts at the same domain, from all senders. This bug has
2659 been fixed. The domain is no longer cached after a negative response to
2660 MAIL if the sender used is not empty.
2661
2662 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2663 been restored.
2664
2665 (c) A new callout option, "use_sender" has been added for people who want
2666 the modified behaviour.
2667
2668
2669Exim version 4.31
2670-----------------
2671
2672 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2673 Larry Rosenman.
2674
2675 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2676 indeed breaks things for older releases.
2677
2678 3. Added additional logging to the case where there is a problem reading data
2679 from a filter that is running in a subprocess using a pipe, in order to
2680 try to track down a specific problem.
2681
2682 4. Testing facility fudge: when running in the test harness and attempting
2683 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2684 getting "No route to host". Convert this to a timeout.
2685
2686 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2687 warning.
2688
2689 6. Some OS don't have socklen_t but use size_t instead. This affects the
2690 fifth argument of getsockopt() amongst other things. This is now
2691 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2692 can be set for individual OS. I have set it for SunOS5, OSF1, and
2693 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2694 some earlier ones do not.
2695
2696 7. Change 4.30/15 was not doing the test caselessly.
2697
2698 8. The standard form for an IPv6 address literal was being rejected by address
2699 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2700 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2701 this, as well as the form without the "IPv6" on the front (but only when
2702 address literals are enabled, of course).
2703
2704 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2705
270610. Exim crashed if a message with an empty sender address specified by -f
2707 encountered a router with an errors_to setting. This could be provoked only
2708 by a command such as
2709
2710 exim -f "" ...
2711
2712 where an empty string was supplied; "<>" did not hit this bug.
2713
271411. Installed PCRE release 4.5.
2715
271612. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2717 remained set. It is now erased.
2718
271913. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2720 times from message ids (which are base 36 rather than the normal 62).
2721
272214. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2723 were being counted as actual protocol errors, and logged if the log
2724 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2725 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2726 and DATA following a set of rejected RCPTs do not count as protocol errors.
2727 In other words, Exim assumes they were pipelined, though this may not
2728 actually be the case. Of course, in all cases the client gets an
2729 appropriate error code.
2730
273115. If a lookup fails in an ACL condition, a message about the failure may
2732 be available; it is used if testing the ACL cannot continue, because most
2733 such messages specify what the cause of the deferral is. However, some
2734 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2735 that caused an old message to be retained and used if a later statement
2736 caused a defer, replacing the real cause of the deferral.
2737
273816. If an IP address had so many PTR records that the DNS lookup buffer
2739 was not large enough to hold them, Exim could crash while trying to process
2740 the truncated data. It now detects and logs this case.
2741
274217. Further to 4.21/58, another change has been made: if (and only if) the
2743 first line of a message (the first header line) ends with CRLF, a bare LF
2744 in a subsequent header line has a space inserted after it, so as not to
2745 terminate the header.
2746
274718. Refactoring: tidied an ugly bit of code in appendfile that copied data
2748 unnecessarily, used atoi() instead of strtol(), and didn't check the
2749 termination when getting file sizes from file names by regex.
2750
275119. Completely re-implemented the support for maildirsize files, in the light
2752 of a number of problems with the previous contributed implementation
2753 (4.30/29). In particular:
2754
2755 . If the quota is zero, the maildirsize file is maintained, but no quota is
2756 imposed.
2757
2758 . If the maildir directory does not exist, it is created before any attempt
2759 to write a maildirsize file.
2760
2761 . The quota value in the file is just a cache; if the quota is changed in
2762 the transport, the new value overrides.
2763
2764 . A regular expression is available for excluding directories from the
2765 count.
2766
276720. The autoreply transport checks the characters in options that define the
2768 message's headers; it allows continued headers, but it was checking with
2769 isspace() after an embedded newline instead of explicitly looking for a
2770 space or a tab.
2771
277221. If all the "regular" hosts to which an address was routed had passed their
2773 expiry times, and had not reached their retry times, the address was
2774 bounced, even if fallback hosts were defined. Now Exim should go on to try
2775 the fallback hosts.
2776
277722. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2778 equivalent code in the SMTP transport. Some hosts send humungous responses
2779 to HELO/EHLO, more than 1024 it seems.
2780
278123. Refactoring: code in filter.c used (void *) for "any old type" but this
2782 gives compiler warnings in some environments. I've now done it "properly",
2783 using a union.
2784
278524. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2786 (because of problems with the built-in one) was declared to return uschar *
2787 instead of char *, causing compiler failure.
2788
278925. Fixed a file descriptor leak when processing alias/forward files.
2790
279126. Fixed a minor format string issue in dbfn.c.
2792
279327. Typo in exim.c: ("dmbnz" for "dbmnz").
2794
279528. If a filter file refered to $h_xxx or $message_headers, and the headers
2796 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2797 become corrupted.
2798
279929. When a sender address is verified, it is cached, to save repeating the test
2800 when there is more than one recipient in a message. However, when the
2801 verification involves a callout, it is possible for different callout
2802 options to be set for different recipients. It is too complicated to keep
2803 track of this in the cache, so now Exim always runs a verification when a
2804 callout is required, relying on the callout cache for the optimization.
2805 The overhead is duplication of the address routing, but this should not be
2806 too great.
2807
280830. Fixed a bug in callout caching. If a RCPT command caused the sender address
2809 to be verified with callout=postmaster, and the main callout worked but the
2810 postmaster check failed, the verification correctly failed. However, if a
2811 subsequent RCPT command asked for sender verification *without* the
2812 postmaster check, incorrect caching caused this verification also to fail,
2813 incorrectly.
2814
281531. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2816 it was not caching the DNS options (qualify_single, search_parents) that
2817 were used when the lookup failed. A subsequent lookup with different
2818 options therefore always gave the same answer, though there were cases
2819 where it should not have. (Example: a "domains = !$mx_any" option on a
2820 dnslookup router: the "domains" option is always processed without any
2821 widening, but the router might have qualify_single set.) Now Exim uses the
2822 cached value only when the same options are set.
2823
282432. Added John Jetmore's "exipick" utility to the distribution.
2825
282633. GnuTLS: When an attempt to start a TLS session fails for any reason other
2827 than a timeout (e.g. a certificate is required, and is not provided), an
2828 Exim server now closes the connection immediately. Previously it waited for
2829 the client to close - but if the client is SSL, it seems that they each
2830 wait for each other, leading to a delay before one of them times out.
2831
283234: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2833 maintained 0.8.x compatibility because I don't think many are using it, and
2834 it is clearly obsolete.
2835
283635. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2837 transport.
2838
283936. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2840 client certificate was expired. A simple patch fixes this, though I don't
2841 understand the full logic of why the verify callback is called multiple
2842 times.
2843
284437. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2845 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2846 which causes problems with some clients (such as the Certicom SSL Plus
2847 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2848 disables the coutermeasure allowing Eudora to connect."
2849
285038. Exim was not checking that a write() to a log file succeeded. This could
2851 lead to Bad Things if a log got too big, in particular if it hit a file
2852 size limit. Exim now panics and dies if it cannot write to a log file, just
2853 as it does if it cannot open a log file.
2854
285539. Modified OS/Makefile-Linux so that it now contains
2856
2857 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2858
2859 The two -D definitions ensure that Exim is compiled with large file
2860 support, which makes it possible to handle log files that are bigger than
2861 2^31.
2862
286340. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2864 instance) a domain was checked against a named list that involved a lookup,
2865 causing $domain_data to be set, then another domain was checked against the
2866 same list, then the first domain was re-checked, the value of $domain_data
2867 after the final check could be wrong. In particular, if the second check
2868 failed, it could be set empty. This bug probably also applied to
2869 $localpart_data.
2870
287141. The strip_trailing_dot option was not being applied to the address given
2872 with the -f command-line option.
2873
287442. The code for reading a message's header from the spool was incrementing
2875 $received_count, but never initializing it. This meant that the value was
2876 incorrect (doubled) while delivering a message in the same process in which
2877 it was received. In the most common configuration of Exim, this never
2878 happens - a fresh exec is done - but it can happen when
2879 deliver_drop_privilege is set.
2880
288143. When Exim logs an SMTP synchronization error - client data sent too soon -
2882 it now includes up to 150 characters of the unexpected data in the log
2883 line.
2884
288544. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2886 and building data strings. The size of both of these buffers was 10 000
2887 bytes - far larger than anybody would *ever* want, thought I. Needless to
2888 say, somebody hit the limit. I have increased the maximum line length to
2889 20 000 and the maximum data length of concatenated lines to 100 000. I have
2890 also fixed two bugs, because there was no checking on these buffers. Tsk,
2891 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2892 buffer is too small.
2893
289445. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2895 lsearch lookups. Now it does.
2896
289746. When parsing a route_list item in a manualroute router, a fixed-length
2898 buffer was used for the list of hosts. I made this 1024 bytes long,
2899 thinking that nobody would ever have a list of hosts that long. Wrong.
2900 Somebody had a whole pile of complicated expansion conditions, and the
2901 string was silently truncated, leading to an expansion error. It turns out
2902 that it is easier to change to an unlimited length (owing to other changes
2903 that have happened since this code was originally written) than to build
2904 structure for giving a limitation error. The length of the item that
2905 expands into the list of hosts is now unlimited.
2906
290747. The lsearch lookup could not handle data where the length of text line was
2908 more than 4095 characters. Such lines were truncated, leading to shortened
2909 data being returned. It should now handle lines of any length.
2910
291148. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2912 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2913 ACL").
2914
291549. Cosmetic tidy to scripts like exicyclog that are generated by globally
2916 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2917 no longer happens in comment lines. A list of replacements is now placed
2918 at the head of all of the source files, except those whose only change is
2919 to replace PERL_COMMAND in the very first #! line.
2920
292150. Replaced the slow insertion sort in queue.c, for sorting the list of
2922 messages on the queue, with a bottom-up merge sort, using code contributed
2923 by Michael Haardt. This should make operations like -bp somewhat faster on
2924 large queues. It won't affect queue runners, except when queue_run_in_order
2925 is set.
2926
292751. Installed eximstats 1.31 in the distribution.
2928
292952. Added support for SRV lookups to the dnslookup router.
2930
293153. If an ACL referred to $message_body or $message_body_end, the value was not
2932 reset for any messages that followed in the same SMTP session.
2933
293454. The store-handling optimization for building very long strings was not
2935 differentiating between the different store pools. I don't think this
2936 actually made any difference in practice, but I've tidied it.
2937
293855. While running the routers to verify a sender address, $sender_address
2939 was still set to the sender address. This is wrong, because when routing to
2940 send a bounce to the sender, it would be empty. Therefore, I have changed
2941 it so that, while verifying a sender address, $sender_address is set to <>.
2942 (There is no change to what happens when verifying a recipient address.)
2943
294456. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2945 target A or AAAA records (if not already returned) without resetting the
2946 qualify_single or search_parents options of the DNS resolver. These are
2947 inappropriate in this case because the targets of MX and SRV records must
2948 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2949 target that, when qualified, matched something in the local domain. These
2950 two options are now turned off when doing these lookups.
2951
295257. It seems that at least some releases of Reiserfs (which does not have the
2953 concept of a fixed number of inodes) returns zero and not -1 for the
2954 number of available inodes. This interacted badly with check_spool_inodes,
2955 which assumed that -1 was the "no such thing" setting. What I have done is
2956 to check that the total number of inodes is greater than zero before doing
2957 the test of how many are available.
2958
295958. When a "warn" ACL statement has a log_message modifier, the message is
2960 remembered, and not repeated. This is to avoid a lot of repetition when a
2961 message has many recipients that cause the same warning to be written.
2962 Howewer, Exim was preserving the list of already written lines for an
2963 entire SMTP session, which doesn't seem right. The memory is now reset if a
2964 new message is started.
2965
296659. The "rewrite" debugging flag was not showing the result of rewriting in the
2967 debugging output unless log_rewrite was also set.
2968
296960. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2970 of (int)(handle) when we know that handle contains (void *)(-1).
2971
297261. The Exim daemon panic-logs an error return when it closes the incoming
2973 connection. However "connection reset by peer" seems to be common, and
2974 isn't really an error worthy of noting specially, so that particular error
2975 is no long logged.
2976
297762. When Exim is trying to find all the local interfaces, it used to panic and
2978 die if the ioctl to get the interface flags failed. However, it seems that
2979 on at least one OS (Solaris 9) it is possible to have an interface that is
2980 included in the list of interfaces, but for which you get a failure error
2981 for this call. This happens when the interface is not "plumbed" into a
2982 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2983 failure of the "get flags" call assumes that the interface is down.
2984
298563. Added a ${eval10: operator, which assumes all numbers are decimal. This
2986 makes life easier for people who are doing arithmetic on fields extracted
2987 from dates, where you often get leading zeros that should not be
2988 interpreted as octal.
2989
299064. Added qualify_domain to the redirect router, to override the global
2991 setting.
2992
299365. If a pathologically long header line contained very many addresses (the
2994 report of this problem mentioned 10 000) and each of them was rewritten,
2995 Exim could use up a very large amount of memory. (It kept on making new
2996 copies of the header line as it rewrote, and never released the old ones.)
2997 At the expense of a bit more processing, the header rewriting function has
2998 been changed so that it no longer eats memory in this way.
2999
300066. The generation of the Received: header has been moved from the time that a
3001 message starts to be received, to the time that it finishes. The timestamp
3002 in the Received: header should now be very close to that of the <= log
3003 line. There are two side-effects of this change:
3004
3005 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3006 logged header lines no longer include the local Received: line, because
3007 it has not yet been created. The same applies to a copy of the message
3008 that is returned to a non-SMTP sender when a message is rejected.
3009
3010 (b) When a filter file is tested using -bf, no additional Received: header
3011 is added to the test message. After some thought, I decided that this
3012 is a bug fix.
3013
3014 This change does not affect the value of $received_for. It is still set
3015 after address rewriting, but before local_scan() is called.
3016
301767. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3018
301968. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3020 gave an unhelpful panic error message, and a defer error. I have managed to
3021 change this behaviour so that it now rejects any supplied certificate,
3022 which seems right, as the list of acceptable certificates is empty.
3023
302469. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3025 gave an unhelpful defer error. I have not managed to make this reject any
3026 supplied certificates, but the error message it gives is "no certificate
3027 supplied", which is not helpful.
3028
302970. exigrep's output now also includes lines that are not associated with any
3030 message, but which match the given pattern. Implemented by a patch from
3031 Martin Sluka, which also tidied up the Perl a bit.
3032
303371. Recipient callout verification, like sender verification, was using <> in
3034 the MAIL FROM command. This isn't really the right thing, since the actual
3035 sender may affect whether the remote host accepts the recipient or not. I
3036 have changed it to use the actual sender in the callout; this means that
3037 the cache record is now keyed on a recipient/sender pair, not just the
3038 recipient address. There doesn't seem to be a real danger of callout loops,
3039 since a callout by the remote host to check the sender would use <>.
3040 [SEE ABOVE: changed after hitting problems.]
3041
304272. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3043 temporary errors. However, in the case of such a code being given after
3044 the end of a data transmission (i.e. after ".") Exim was failing to write
3045 a retry record for the message. (Yes, there was some broken host that was
3046 actually sending 8xx at this point.)
3047
304873. An unknown lookup type in a host list could cause Exim to panic-die when
3049 the list was checked. (An example that provoked this was putting <; in the
3050 middle of a list instead of at the start.) If this happened during a DATA
3051 ACL check, a -D file could be left lying around. This kind of configuration
3052 error no longer causes Exim to die; instead it causes a defer errror. The
3053 incident is still logged to the main and panic logs.
3054
305574. Buglet left over from Exim 3 conversion. The message "too many messages
3056 in one connection" was written to the rejectlog but not the mainlog, except
3057 when address rewriting (yes!) was being logged.
3058
305975. Added write_rejectlog option.
3060
306176. When a system filter was run not as root (that is, when system_filter_user
3062 was set), the values of the $n variables were not being returned to the
3063 main process; thus, they were not subsequently available in the $sn
3064 variables.
3065
306677. Added +return_path_on_delivery log selector.
3067
306878. A connection timeout was being treated differently from recipients deferred
3069 when testing hosts_max_try with a message that was older than the host's
3070 retry timeout. (The host should not be counted, thus allowing all hosts to
3071 be tried at least once before bouncing.) This may have been the cause of an
3072 occasionally reported bug whereby a message would remain on the queue
3073 longer than the retry timeout, but would be bounced if a delivery was
3074 forced. I say "may" because I never totally pinned down the problem;
3075 setting up timeout/retry tests is difficult. See also the next item.
3076
307779. The ultimate address timeout was not being applied to errors that involved
3078 a combination of host plus message (for example, a timeout on a MAIL
3079 command). When an address resolved to a number of possible hosts, and they
3080 were not all tried for each delivery (e.g. because of hosts_max_try), a
3081 message could remain on the queue longer than the retry timeout.
3082
308380. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3084 Haardt.
3085
308681. Fixed an obscure SMTP outgoing bug which required at least the following
3087 conditions: (a) there was another message waiting for the same server;
3088 (b) the server returned 5xx to all RCPT commands in the first message so
3089 that the message was not completed; (c) the server dropped the connection
3090 or gave a negative response to the RSET that Exim sends to abort the
3091 transaction. The observed case was a dropped connection after DATA that had
3092 been sent in pipelining mode. That is, the server had advertised PIPELINING
3093 but was not implementing it correctly. The effect of the bug was incorrect
3094 behaviour, such as trying another host, and this could lead to a crash.
3095
3096
3097Exim version 4.30
3098-----------------
3099
3100 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3101 and daemon.c were passed as pointers to ints; they should have been
3102 pointers to socklen_t variables (which are typically unsigned ints).
3103
3104 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3105 fixed.
3106
3107 3. Fixed a really odd bug that affected only the testing scheme; patching a
3108 certain fixed string in the binary changed the value of another string that
3109 happened to be identical to the end of the original first string.
3110
3111 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3112 name", it returns that address as the IP address. On some operating
3113 systems (e.g. Solaris), it also passes back the IP address string as the
3114 "host name". However, on others (e.g. Linux), it passes back an empty
3115 string. Exim wasn't checking for this, and was changing the host name to an
3116 empty string, assuming it had been canonicized.
3117
3118 5. Although rare, it is permitted to have more than one PTR record for a given
3119 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3120 all the names associated with an address, because they do in Solaris.
3121 However, it seems that they do not in Linux for data that comes from the
3122 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3123 I found this out when I moved to a new Linux workstation and tried to run
3124 the Exim test suite.
3125
3126 To get round this problem I have changed the code so that it now does its
3127 own call to the DNS to look up PTR records when searching for a host name.
3128 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3129 addresses that are only in /etc/hosts are still found.
3130
3131 This behaviour is, however, controlled by an option called host_lookup_
3132 order, which defaults to "bydns:byaddr". If people want to use the other
3133 order, or indeed, just use one or the other means of lookup, they can
3134 specify it in this variable.
3135
3136 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3137 some operating systems, this comes back from gethostbyaddr() as an empty
3138 string, and this is what Exim used to test for. However, it seems that in
3139 other systems, "." is yielded. Exim now tests for this case too.
3140
3141 7. The values of check_spool_space and check_log_space are now held internally
3142 as a number of kilobytes instead of an absolute number of bytes. If a
3143 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3144 kilobyte. This means that much larger values can be stored.
3145
3146 8. Exim monitor: an attempt to get the action menu when not actually pointing
3147 at a message produces an empty menu entitled "No message selected". This
3148 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3149 no entries in it ("Shell widget menu has zero width and/or height"). So I
3150 have added a single, blank menu entry in this case.
3151
3152 9. Added ${quote_local_part.
3153
315410. MIME decoding is now applied to the contents of Subject: header lines when
3155 they are logged.
3156
315711. Now that a reference to $sender_host_address automatically causes a reverse
3158 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3159 host lookup before query-style lookups in lists that might use this
3160 variable. This has therefore been abolished, and the "net-" prefix is no
3161 longer necessary for query-style lookups.
3162
316312. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3164 have been a typo for LFLAGS, so it has been changed.
3165
316613. The install script calls Exim with "-C /dev/null" in order to find the
3167 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3168 to be output. Howeve, since Exim outputs its version number before the
3169 error, it didn't break the script. It just looked ugly. I fixed this by
3170 always allowing "-C /dev/null" if the caller is root.
3171
317214. Ignore overlarge ACL variable number when reading spool file - insurance
3173 against a later release with more variables having written the file.
3174
317515. The standard form for an IPv6 address literal was being rejected by EHLO.
3176 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3177 this, as well as the form without the "IPv6" on the front.
3178
317916. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3180 OS/Makefile-Darwin file.
3181
318217. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3183 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3184
318518. After change 4.21/52, "%ld" was used to format the contents of the $inode
3186 variable. However, some OS use ints for inodes. I've added cast to long int
3187 to get rid of the compiler warning.
3188
318919. I had forgotten to lock out "/../" in configuration file names when
3190 ALT_CONFIG_PREFIX was set.
3191
319220. Routers used for verification do not need to specify transports. However,
3193 if such a router generated a host list, and callout was configured, Exim
3194 crashed, because it could not find a port number from the (non-existent)
3195 transport. It now assumes port 25 in this circumstance.
3196
319721. Added the -t option to exigrep.
3198
319922. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3200 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3201 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3202 them is set, LOOKUP_LSEARCH is forced.
3203
320423. "exim -bV" now outputs a list of lookups that are included in the binary.
3205
320624. Added sender and host information to the "rejected by local_scan()" log
3207 line; previously there was no indication of these.
3208
320925. Added .include_if_exists.
3210
321126. Change 3.952/11 added an explicit directory sync on top of a file sync for
3212 Linux. It turns out that not all file systems support this. Apparently some
3213 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3214 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3215 not supported on the file descriptor, is now ignored when Exim is trying to
3216 sync a directory. This applies only to Linux.
3217
321827. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3219
322028. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3221 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3222 this.
3223
322429. Added support for maildirsize files from supplied patch (modified a bit).
3225
322630. The use of :fail: followed by an empty string could lead Exim to respond to
3227 sender verification failures with (e.g.):
3228
3229 550 Verification failed for <xxx>
3230 550 Sender verify failed
3231
3232 where the first response line was missing the '-' that indicates it is not
3233 the final line of the response.
3234
323531. The loop for finding the name of the user that called Exim had a hardwired
3236 limit of 10; it now uses the value of finduser_retries, which is used for
3237 all other user lookups.
3238
323932. Added $received_count variable, available in data and not_smtp ACLs, and at
3240 delivery time.
3241
324233. Exim was neglecting to zero errno before one call of strtol() when
3243 expanding a string and expecting an integer value. On some systems this
3244 resulted in spurious "integer overflow" errors. Also, it was casting the
3245 result into an int without checking.
3246
324734. Testing for a connection timeout using "timeout_connect" in the retry rules
3248 did not work. The code looks as if it has *never* worked, though it appears
3249 to have been documented since at least releast 1.62. I have made it work.
3250
325135. The "timeout_DNS" error in retry rules, also documented since at least
3252 1.62, also never worked. As it isn't clear exactly what this means, and
3253 clearly it isn't a major issue, I have abolished the feature by treating it
3254 as "timeout", and writing a warning to the main and panic logs.
3255
325636. The display of retry rules for -brt wasn't always showing the error code
3257 correctly.
3258
325937. Added new error conditions to retry rules: timeout_A, timeout_MX,
3260 timeout_connect_A, timeout_connect_MX.
3261
326238. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3263 to the empty sender.
3264
326539. The daemon was not analysing the content of -oX till after it had closed
3266 stderr and disconnected from the controlling terminal. This meant that any
3267 syntax errors were only noted on the panic log, and the return code from
3268 the command was 0. By re-arranging the code a little, I've made the
3269 decoding happen first, so such errors now appear on stderr, and the return
3270 code is 1. However, the actual setting up of the sockets still happens in
3271 the disconnected process, so errors there are still only recorded on the
3272 panic log.
3273
327440. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3275 connections (as happens on some IP stacks) was logged at start up time as
3276 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3277 it from "IPv6 and IPv4", which means that two separate sockets are being
3278 used.
3279
328041. The debug output for gethostbyname2() or getipnodebyname() failures now
3281 says whether AF_INET or AF_INET6 was passed as an argument.
3282
328342. Exiwhat output was messed up when time zones were included in log
3284 timestamps.
3285
328643. Exiwhat now gives more information about the daemon's listening ports,
3287 and whether -tls-on-connect was used.
3288
328944. The "port" option of the smtp transport is now expanded.
3290
329145. A "message" modifier in a "warn" statement in a non-message ACL was being
3292 silently ignored. Now an error message is written to the main and panic
3293 logs.
3294
329546. There's a new ACL modifier called "logwrite" which writes to a log file
3296 as soon as it is encountered.
3297
329847. Added $local_user_uid and $local_user_gid at routing time.
3299
330048. Exim crashed when trying to verify a sender address that was being
3301 rewritten to "<>".
3302
330349. Exim was recognizing only a space character after ".include". It now also
3304 recognizes a tab character.
3305
330650. Fixed several bugs in the Perl script that creates the exim.8 man page by
3307 extracting the relevant information from the specification. The man page no
3308 longer contains scrambled data for the -d option, and I've added a section
3309 at the front about calling Exim under different names.
3310
331151. Added "extra_headers" argument to the "mail" command in filter files.
3312
331352. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3314 crash.
3315
331653. Installed eximstats 1.29.
3317
331854. Added transport_filter_timeout as a generic transport option.
3319
332055. Exim no longer adds an empty Bcc: header to messages that have no To: or
3321 Cc: header lines. This was required by RFC 822, but it not required by RFC
3322 2822.
3323
332456. Exim used to add From:, Date:, and Message-Id: header lines to any
3325 incoming messages that did not have them. Now it does so only if the
3326 message originates locally, that is, if there is no associated remote host
3327 address. When Resent- header lines are present, this applies to the Resent-
3328 lines rather than the non-Resent- lines.
3329
333057. Drop incoming SMTP connection after too many syntax or protocol errors. The
3331 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3332
333358. Messages for configuration errors now include the name of the main
3334 configuration file - useful now that there may be more than one file in a
3335 list (.included file names were always shown).
3336
333759. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3338 for those rare installations that do not start the daemon as root or run it
3339 setuid root. I've cut out the call to initgroups() if the daemon is not
3340 root at that time.
3341
334260. The Exim user and group can now be bound into the binary as text strings
3343 that are looked up at the start of Exim's processing.
3344
334561. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3346
334762. Added $mailstore_basename variable.
3348
334963. Installed patch to sieve.c from Michael Haardt.
3350
335164. When Exim failed to open the panic log after failing to open the main log,
3352 the original message it was trying to log was written to stderr and debug
3353 output, but if they were not available (the usual case in production), it
3354 was lost. Now it is written to syslog before the two lines that record the
3355 failures to open the logs.
3356
335765. Users' Exim filters run in subprocesses under the user's uid. It is
3358 possible for a "deliver" command or an alias in a "personal" command to
3359 provoke an address rewrite. If logging of address rewriting is configured,
3360 this fails because the process is not running as root or exim. There may be
3361 a better way of dealing with this, but for the moment (because 4.30 needs
3362 to be released), I have disabled address rewrite logging when running a
3363 filter in a non-root, non-exim process.
3364
3365
3366Exim version 4.24
3367-----------------
3368
3369 1. The buildconfig auxiliary program wasn't quoting the value set for
3370 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3371 not defined. This bug was masked in 4.22 by the effect that was fixed in
3372 change 4.23/1.
3373
3374 2. Some messages that were rejected after a message id was allocated were
3375 shown as "incomplete" by exigrep. It no longer does this for messages that
3376 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3377
3378 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3379 have allow_domain_literals set, the ID did not get logged in the <= line.
3380 Domain literals are now always recognized in Message-ID: header lines.
3381
3382 4. The first argument for a ${extract expansion item is the key name or field
3383 number. Leading and trailing spaces in this item were not being ignored,
3384 causing some misleading effects.
3385
3386 5. When deliver_drop_privilege was set, single queue runner processes started
3387 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3388 same command in the process it spins off) were not dropping privilege.
3389
3390 6. When the daemon running as "exim" started a queue runner, it always
3391 re-executed Exim in the spun-off process. This is a waste of effort when
3392 deliver_drop_privilege is set. The new process now just calls the
3393 queue-runner function directly.
3394
3395
3396Exim version 4.23
3397-----------------
3398
3399 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3400 HEADERS_CHARSET.
3401
3402 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3403 ignored. Though the use of -oP was forcing the writing of a pid file, it
3404 was always written to the default place.
3405
3406 3. If the message "no IP address found for host xxxx" is generated during
3407 incoming verification, it is now followed by identification of the incoming
3408 connection (so you can more easily find what provoked it).
3409
3410 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3411
3412 5. Added some features to "harden" Exim a bit more against certain attacks:
3413
3414 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3415 be put in Local/Makefile. This is like the never_users runtime option,
3416 but it cannot be overridden. The default setting is "root".
3417
3418 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3419 prefix string with which any file named in a -C command line option
3420 must start.
3421
3422 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3423 is retained for -C and -D only if the caller of Exim is root. Without
3424 it, the exim user may also use -C and -D and retain privilege.
3425
3426 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3427 command line option is disabled.
3428
3429 6. Macro names set by the -D option must start with an upper case letter, just
3430 like macro names defined in the configuration file.
3431
3432 7. Added "dereference=" facility to LDAP.
3433
3434 8. Two instances of the typo "uknown" in the source files are fixed.
3435
3436 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3437 the Configure-Makefile script screwed up while processing it.
3438
343910. Incorporated PCRE 4.4.
3440
344111. The SMTP synchronization check was not operating right at the start of an
3442 SMTP session. For example, it could not catch a HELO sent before the client
3443 waited for the greeting. There is now a check for outstanding input at the
3444 point when the greeting is written. Because of the duplex, asynchronous
3445 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3446 way, but not yet received, when the check is performed.
3447
344812. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3449 on TCP/IP sockets, because this apparently causes some broken clients to
3450 timeout.
3451
345213. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3453 unchanged) from the Cygwin maintainer.
3454
345514. The code for -bV that shows what is in the binary showed "mbx" when maildir
3456 was supported instead of testing for mbx. Effectively a typo.
3457
345815. The spa authenticator server code was not checking that the input it
3459 received was valid base64.
3460
346116. The debug output line for the "set" modifier in ACLs was not showing the
3462 name of the variable that was being set.
3463
346417. Code tidy: the variable type "vtype_string" was never used. Removed it.
3465
346618. Previously, a reference to $sender_host_name did not cause a DNS reverse
3467 lookup on its own. Something else was needed to trigger the lookup. For
3468 example, a match in host_lookup or the need for a host name in a host list.
3469 Now, if $sender_host_name is referenced and the host name has not yet been
3470 looked up, a lookup is performed. If the lookup fails, the variable remains
3471 empty, and $host_lookup_failed is set to "1".
3472
347319. Added "eqi" as a case-independent comparison operator.
3474
347520. The saslauthd authentication condition could segfault if neither service
3476 nor realm was specified.
3477
347821. If an overflowing value such as "2048M" was set for message_size_limit, the
3479 error message that was logged was misleading, and incoming SMTP
3480 connections were dropped. The message is now more accurate, and temporary
3481 errors are given to SMTP connections.
3482
348322. In some error situations (such as 21 above) Exim rejects all SMTP commands
3484 (except RSET) with a 421 error, until QUIT is received. However, it was
3485 failing to send a response to QUIT.
3486
348723. The HELO ACL was being run before the code for helo_try_verify_hosts,
3488 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3489 ACL is now run after the helo_try_verify_hosts code.
3490
349124. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3492 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3493 case-independent, so other case variants are also recognized). Apparently
3494 some systems use these upper case variants.
3495
349625. If more than two messages were waiting for the same host, and a transport
3497 filter was specified for the transport, Exim sent two messages over the
3498 same TCP/IP connection, and then failed with "socket operation on non-
3499 socket" when it tried to send the third.
3500
350126. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3502
350327. The extern definition of crypt16() in expand.c was not being excluded when
3504 the OS had its own crypt16() function.
3505
350628. Added bounce_return_body as a new option, and bounce_return_size_limit
3507 as a preferred synonym for return_size_limit, both as an option and as an
3508 expansion variable.
3509
351029. Added LIBS=-liconv to OS/Makefile-OSF1.
3511
351230. Changed the default configuration ACL to relax the local part checking rule
3513 for addresses that are not in any local domains. For these addresses,
3514 slashes and pipe symbols are allowed within local parts, but the sequence
3515 /../ is explicitly forbidden.
3516
351731. SPA server authentication was not clearing the challenge buffer before
3518 using it.
3519
352032. log_message in a "warn" ACL statement was writing to the reject log as
3521 well as to the main log, which contradicts the documentation and doesn't
3522 seem right (because no rejection is happening). So I have stopped it.
3523
352433. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3525 However, I am unable to do any testing of this.
3526
352734. Fixed an infelicity in the appendfile transport. When checking directories
3528 for a mailbox, to see if any needed to be created, it was accidentally
3529 using path names with one or more superfluous leading slashes; tracing
3530 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3531
353235. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3533 contents are added to the log line that is written for every discarded
3534 recipient. (Previously a log_message setting was ignored.)
3535
353636. The ${quote: operator now quotes the string if it is empty.
3537
353837. The install script runs exim in order to find its version number. If for
3539 some reason other than non-existence or emptiness, which it checks, it
3540 could not run './exim', it was installing it with an empty version number,
3541 i.e. as "exim-". This error state is now caught, and the installation is
3542 aborted.
3543
354438. An argument was missing from the function that creates an error message
3545 when Exim fails to connect to the socket for saslauthd authentication.
3546 This could cause Exim to crash, or give a corrupted message.
3547
354839. Added isip, isip4, and isip6 to ${if conditions.
3549
355040. The ACL variables $acl_xx are now saved with the message, and can be
3551 accessed later in routers, transports, and filters.
3552
355341. The new lookup type nwildlsearch is like wildlsearch, except that the key
3554 strings in the file are not string-expanded.
3555
355642. If a MAIL command specified a SIZE value that was too large to fit into an
3557 int variable, the check against message_size_limit failed. Such values are
3558 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3559 day this will have to be increased, but I don't think I want to be around
3560 when emails are that large.
3561
3562
3563
3564Exim version 4.22
3565-----------------
3566
3567 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3568 iconv() is not standard in FreeBSD.
3569
3570 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3571 IPv6 enabled. The observed symptom was a segmentation fault on return from
3572 the function os_common_find_running_interfaces() in src/os.c.
3573
3574 3. In the check_special_case() function in daemon.c I had used "errno" as an
3575 argument name, which causes warnings on some systems. This was basically a
3576 typo, since it was named "eno" in the comments!
3577
3578 4. The code that waits for the clock to tick (at a resolution of some fraction
3579 of a second) so as to ensure message-id uniqueness was always waiting for
3580 at least one whole tick, when it could have waited for less. [This is
3581 almost certainly not relevant at current processor speeds, where it is
3582 unlikely to ever wait at all. But we try to future-proof.]
3583
3584 5. The function that sleeps for a time interval that includes fractions of a
3585 second contained a race. It did not block SIGALRM between setting the
3586 timer, and suspending (a couple of lines later). If the interval was short
3587 and the sigsuspend() was delayed until after it had expired, the suspension
3588 never ended. On busy systems this could lead to processes getting stuck for
3589 ever.
3590
3591 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3592 process, before it forks any delivery processes. The open lookup caching
3593 mechanism meant that the open file or database connection was passed into
3594 the delivery process. The problem was that delivery processes always tidy
3595 up cached lookup data. This could cause a problem for the next delivery
3596 process started by the queue runner, because the external queue runner
3597 process does not know about the closure. So the next delivery process
3598 still has data in the lookup cache. In the case of a file lookup, there was
3599 no problem because closing a file descriptor in a subprocess doesn't affect
3600 the parent. However, if the lookup was caching a connection to a database,
3601 the connection was closed, and the second delivery process was likely to
3602 see errors such as "PGSQL: query failed: server closed the connection
3603 unexpectedly". The problem has been fixed by closing all cached lookups
3604 in a queue runner before running a delivery process.
3605
3606 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3607 seem to have the "const" qualifier which it has on other OS. I've
3608 parameterised it.
3609
3610 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3611 *of the same type* (client or server) with the same public name that an
3612 error should be diagnosed.
3613
3614 9. When Exim looked up a host name for an IP address, but failed to find the
3615 original IP address when looking up the host name (a safety check), it
3616 output the message "<ip address> does not match any IP for NULL", which was
3617 confusing, to say the least. The bug was that the host name should have
3618 appeared instead of "NULL".
3619
362010. Since release 3.03, if Exim is called by a uid other than root or the Exim
3621 user that is built into the binary, and the -C or -D options is used, root
3622 privilege is dropped before the configuration file is read. In addition,
3623 logging is switched to stderr instead of the normal log files. If the
3624 configuration then re-defines the Exim user, the unprivileged environment
3625 is probably not what is expected, so Exim logs a panic warning message (but
3626 proceeds).
3627
3628 However, if deliver_drop_privilege is set, the unprivileged state may well
3629 be exactly what is intended, so the warning has been cut out in that case,
3630 and Exim is allowed to try to write to its normal log files.
3631
3632
3633Exim version 4.21
3634-----------------
3635
3636 1. smtp_return_error_details was not giving details for temporary sender
3637 or receiver verification errors.
3638
3639 2. Diagnose a configuration error if two authenticators have the same public
3640 name.
3641
3642 3. Exim used not to create the message log file for a message until the first
3643 delivery attempt. This could be confusing when incoming messages were held
3644 for policy or load reasons. The message log file is now created at the time
3645 the message is received, and an initial "Received" line is written to it.
3646
3647 4. The automatically generated man page for command line options had a minor
3648 bug that caused no ill effects; however, a more serious problem was that
3649 the procedure for building the man page automatically didn't always
3650 operate. Consequently, release 4.20 contains an out-of-date version. This