Make -R and -S do something sensible when combined with -q<time>.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
4fbcfc2e 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.428 2006/11/07 15:56:17 ph10 Exp $
495ae4b0
PH
2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
944e9e9c
TF
6Exim version 4.64
7-----------------
21d74bd9
TK
8TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
9 leftover -K file (the existence of which was triggered by #402).
10 While we were at it, introduced process PID as part of the -K
11 filename. This should rule out race conditions when creating
12 these files.
13
14TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
15 processing considerably. Previous code took too long for large mails,
16 triggering a timeout which in turn triggers #401.
17
18TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
19 in the DK code in transports.c. sendfile() is not really portable,
20 hence the _LINUX specificness.
944e9e9c
TF
21
22TF/01 In the add_headers option to the mail command in an Exim filter,
23 there was a bug that Exim would claim a syntax error in any
24 header after the first one which had an odd number of characters
25 in the field name.
26
2b1c6e3a
PH
27PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
28 callout verification, Exim cached a "reject" for the entire domain. This
29 is correct for most verifications, but it is not correct for a recipient
30 verification with use_sender or use_postmaster set, because in that case
31 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
32 case of MAIL FROM:<> rejection from other early rejections (e.g.
33 rejection of HELO). When verifying a recipient using a non-null MAIL
34 address, the cache is ignored if it shows MAIL FROM:<> rejection.
35 Whatever the result of the callout, the value of the domain cache is
36 left unchanged (for any other kind of callout, getting as far as trying
37 RCPT means that the domain itself is ok).
38
1f872c80
PH
39PH/02 Tidied a number of unused variable and signed/unsigned warnings that
40 gcc 4.1.1 threw up.
41
42PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
43 manifest itself as EPIPE rather than ECONNECT. When tidying away a
44 session, the daemon ignores ECONNECT errors and logs others; it now
45 ignores EPIPE as well.
46
d203e649
PH
47PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
48 (quoted-printable decoding).
49
cc2ed8f7 50PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
21a04aa3 51 later the small subsequent patch to fix an introduced bug.
f951fd57 52
ddfcd446
PH
53PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
54
d45b1de8
PH
55PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
56
57PH/08 An error is now given if message_size_limit is specified negative.
58
38a0a95f 59PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
641cb756 60 to be given (somewhat) arbitrary names.
38a0a95f 61
a2405d83
JJ
62JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
63 in 4.64-PH/09.
64
65JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
66 miscellaneous code fixes
67
6ea85e9a
PH
68PH/10 Added the log_reject_target ACL modifier to specify where to log
69 rejections.
70
26da7e20
PH
71PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
72 hostname. This is wrong, because it relates to the incoming message (and
73 probably the interface on which it is arriving) and not to the outgoing
74 callout (which could be using a different interface). This has been
75 changed to use the value of the helo_data option from the smtp transport
76 instead - this is what is used when a message is actually being sent. If
77 there is no remote transport (possible with a router that sets up host
78 addresses), $smtp_active_hostname is used.
6ea85e9a 79
14aa5a05 80PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
7befa435 81 tweaks were necessary in order to get it to work (see also 21 below):
14aa5a05
PH
82 (a) The code assumed that strncpy() returns a negative number on buffer
83 overflow, which isn't the case. Replaced with Exim's string_format()
84 function.
85 (b) There were several signed/unsigned issues. I just did the minimum
86 hacking in of casts. There is scope for a larger refactoring.
87 (c) The code used strcasecmp() which is not a standard C function.
88 Replaced with Exim's strcmpic() function.
89 (d) The code set only $1; it now sets $auth1 as well.
90 (e) A simple test gave the error "authentication client didn't specify
91 service in request". It would seem that Dovecot has changed its
92 interface. Fortunately there's a specification; I followed it and
93 changed what the client sends and it appears to be working now.
94
ff75a1f7
PH
95PH/13 Added $message_headers_raw to provide the headers without RFC 2047
96 decoding.
97
e6f6568e
PH
98PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
99 address A is aliased to B and C, where B exists and C does not. Without
100 -v the output is "A verified" because verification stops after a
101 successful redirection if more than one address is generated. However,
102 with -v the child addresses are also verified. Exim was outputting "A
103 failed to verify" and then showing the successful verification for C,
104 with its parentage. It now outputs "B failed to verify", showing B's
105 parentage before showing the successful verification of C.
106
d6f6e0dc
PH
107PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
108 look up a TXT record in a specific list after matching in a combined
109 list.
110
322050c2
PH
111PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
112 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
113 they consult the DNS. I had assumed they would set it the way they
114 wanted; and indeed my experiments on Linux seem to show that in some
115 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
116 To be on the safe side, however, I have now made the interface to
117 host_find_byname() similar to host_find_bydns(), with an argument
118 containing the DNS resolver options. The host_find_byname() function now
119 sets these options at its start, just as host_find_bydns() does. The smtp
120 transport options dns_qualify_single and dns_search_parents are passed to
121 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
122 of host_find_byname() use the default settings of RES_DEFNAMES
123 (qualify_single) but not RES_DNSRCH (search_parents).
124
08955dd3
PH
125PH/17 Applied (a modified version of) Nico Erfurth's patch to make
126 spool_read_header() do less string testing, by means of a preliminary
127 switch on the second character of optional "-foo" lines. (This is
128 overdue, caused by the large number of possibilities that now exist.
129 Originally there were few.) While I was there, I also converted the
130 str(n)cmp tests so they don't re-test the leading "-" and the first
131 character, in the hope this might squeeze out yet more improvement.
132
1eccaa59
PH
133PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
134 flag allowing group syntax was set by the header_syntax check but not
135 turned off, possible causing trouble later; (2) The flag was not being
136 set at all for the header_verify test, causing "group"-style headers to
137 be rejected. I have now set it in this case, and also caused header_
138 verify to ignore an empty address taken from a group. While doing this, I
139 came across some other cases where the code for allowing group syntax
140 while scanning a header line wasn't quite right (mostly, not resetting
141 the flag correctly in the right place). These bugs could have caused
142 trouble for malformed header lines. I hope it is now all correct.
143
602e59e5
PH
144PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
145 with the "reply" argument non-NULL. The code, however (which originally
146 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
147 but it didn't always do it. This confused somebody who was copying the
148 code for some other use. I have removed all the tests.
149
411ef850
PH
150PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
151 feature that was used to support insecure browsers during the U.S. crypto
152 embargo. It requires special client support, and Exim is probably the
153 only MTA that supported it -- and would never use it because real RSA is
154 always available. This code has been removed, because it had the bad
155 effect of slowing Exim down by computing (never used) parameters for the
156 RSA_EXPORT functionality.
157
7befa435
PH
158PH/21 On the advice of Timo Sirainen, added a check to the dovecot
159 authenticator to fail if there's a tab character in the incoming data
160 (there should never be unless someone is messing about, as it's supposed
161 to be base64-encoded). Also added, on Timo's advice, the "secured" option
162 if the connection is using TLS or if the remote IP is the same as the
163 local IP, and the "valid-client-cert option" if a client certificate has
164 been verified.
165
48da4259 166PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
16ff981e
PH
167 authenticators. This can be used for authorization after authentication
168 succeeds. (In the case of plaintext, it servers for both authentication
169 and authorization.)
170
48da4259
PH
171PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
172 if any retry times were supplied.
173
d1d5595c
PH
174PH/24 Exim crashed if verify=helo was activated during an incoming -bs
175 connection, where there is no client IP address to check. In this
176 situation, the verify now always succeeds.
177
0ef732d9
PH
178PH/25 Applied John Jetmore's -Mset patch.
179
328895cc
PH
180PH/26 Added -bem to be like -Mset, but loading a message from a file.
181
fd700877
PH
182PH/27 In a string expansion for a processed (not raw) header when multiple
183 headers of the same name were present, leading whitespace was being
184 removed from all of them, but trailing whitespace was being removed only
185 from the last one. Now trailing whitespace is removed from each header
f6c332bd
PH
186 before concatenation. Completely empty headers in a concatenation (as
187 before) are ignored.
fd700877 188
8dce1a6f
PH
189PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
190 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
191
17af4a17
PH
192PH/29 [Removed. This was a change that I later backed out, and forgot to
193 correct the ChangeLog entry (that I had efficiently created) before
194 committing the later change.]
f6c332bd
PH
195
196PH/30 Exim was sometimes attempting to deliver messages that had suffered
197 address errors (4xx response to RCPT) over the same connection as other
198 messages routed to the same hosts. Such deliveries are always "forced",
199 so retry times are not inspected. This resulted in far too many retries
200 for the affected addresses. The effect occurred only when there were more
201 hosts than the hosts_max_try setting in the smtp transport when it had
202 the 4xx errors. Those hosts that it had tried were not added to the list
203 of hosts for which the message was waiting, so if all were tried, there
204 was no problem. Two fixes have been applied:
205
206 (i) If there are any address or message errors in an SMTP delivery, none
207 of the hosts (tried or untried) are now added to the list of hosts
208 for which the message is waiting, so the message should not be a
209 candidate for sending over the same connection that was used for a
210 successful delivery of some other message. This seems entirely
211 reasonable: after all the message is NOT "waiting for some host".
212 This is so "obvious" that I'm not sure why it wasn't done
213 previously. Hope I haven't missed anything, but it can't do any
214 harm, as the worst effect is to miss an optimization.
215
216 (ii) If, despite (i), such a delivery is accidentally attempted, the
217 routing retry time is respected, so at least it doesn't keep
218 hammering the server.
219
c1114884
PH
220PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
221 in ${readsocket because some servers need this prod.
222
7a0743eb
PH
223PH/32 Added some extra debug output when updating a wait-xxx database.
224
0d85fa3f
PH
225PH/33 The hint "could be header name not terminated by colon", which has been
226 given for certain expansion errors for a long time, was not being given
227 for the ${if def:h_colon_omitted{... case.
228
1bf43b78
PH
229PH/34 The spec says: "With one important exception, whenever a domain list is
230 being scanned, $domain contains the subject domain." There was at least
231 one case where this was not true.
232
520de300
PH
233PH/35 The error "getsockname() failed: connection reset by peer" was being
234 written to the panic log as well as the main log, but it isn't really
235 panic-worthy as it just means the connection died rather early on. I have
236 removed the panic log writing for the ECONNRESET error when getsockname()
237 fails.
238
48c7f9e2
PH
239PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
240 runs only) independently of the message's sender address. This meant
241 that, if the 4xx error was in fact related to the sender, a different
242 message to the same recipient with a different sender could confuse
243 things. In particualar, this can happen when sending to a greylisting
244 server, but other circumstances could also provoke similar problems.
245 I have changed the default so that the retry time for these errors is now
246 based a combination of the sender and recipient addresses. This change
247 can be overridden by setting address_retry_include_sender=false in the
248 smtp transport.
249
99ea1c86
PH
250PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
251 remote server are returned as part of bounce messages. This was not
252 happening for LMTP over a pipe (the lmtp transport), but now it is the
253 same for both kinds of LMTP.
254
a2042e78
PH
255PH/38 Despite being documented as not happening, Exim was rewriting addresses
256 in header lines that were in fact CNAMEs. This is no longer the case.
257
4fbcfc2e
PH
258PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
259 and queue runs started by the daemon processed all messages. This has
260 been fixed so that -R and -S can now usefully be given with -q<time>.
261
944e9e9c 262
478be7b0
SC
263Exim version 4.63
264-----------------
265
266SC/01 Use a glob alias rather than an array ref in eximstats generated
267 parser. This improves both readability and performance.
268
269SC/02 Collect SpamAssassin and rejection statistics in eximstats.
270 Don't display local sender or destination tables in eximstats unless
271 there is data to show.
272 Added average volumes into the eximstats top table text output.
273
274SC/03 Collect data on the number of addresses (recipients) as well
275 as the number of messages in eximstats.
276
2b965a65
TF
277TF/01 Correct an error in the documentation for the redirect router. Exim
278 does (usually) call initgroups() when daemonizing.
478be7b0 279
45b91596
PH
280TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
281 with consistent privilege compared to when running as a daemon.
478be7b0 282
c59f5781
TF
283TF/03 Note in the spec that $authenticated_id is not set for local
284 submissions from trusted users.
285
90fc3069
TF
286TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
287 Thanks to Dean Brooks <dean@iglou.com> for the patch.
288
6083aca0
TF
289TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
290 by adding some example configuration directives to the default
291 configuration file. A little bit of work is required to uncomment the
292 directives and define how usernames and passwords are checked, but
293 there is now a framework to start from.
294
765b530f
PH
295PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
296 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
297 without this. I don't know how relevant this is to other LDAP libraries.
298
4e167a8c
PH
299PH/02 Add the verb name to the "unknown ACL verb" error.
300
4608d683
PH
301PH/03 Magnus Holmgren's patch for filter_prepend_home.
302
b8dc3e4a
PH
303PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
304
5418e93b
PH
305PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
306 directory not expanded when it should be if an expanded home directory
307 was set for the address (which is overridden by the transport).
308
b4a9bda2
PH
309PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
310 libradius.
311
45b91596
PH
312PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
313 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
314 because it is too late at that time, and has no effect.
315
5547e2c5
PH
316PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
317 security issue with \' (bugzilla #107). I could not use the
318 PQescapeStringConn() function, because it needs a PGconn value as one of
319 its arguments.
320
dbcef0ea
PH
321PH/08 When testing addresses using -bt, indicate those final addresses that
322 are duplicates that would not cause an additional delivery. At least one
323 person was confused, thinking that -bt output corresponded to deliveries.
324 (Suppressing duplicates isn't a good idea as you lose the information
325 about possibly different redirections that led to the duplicates.)
326
25257489
PH
327PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
328 systems where poll() doesn't work, in particular OS X.
329
c816d124
PH
330PH/10 Added more information to debugging output for retry time not reached.
331
a9ccd69a
PH
332PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
333 operations in malware.c.
334
75fa1910
PH
335PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
336 signatures.
337
a7d7aa58
PH
338PH/13 If write_rejectlog was set false when logging was sent to syslog with
339 syslog_duplication set false, log lines that would normally be written
340 both the the main log and to the reject log were not written to syslog at
341 all.
342
42119b09
PH
343PH/14 In the default configuration, change the use of "message" in ACL warn
344 statements to "add_header".
345
41609df5
PH
346PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
347 not followed by a command (e.g. "seen endif").
348
a5bd321b
PH
349PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
350 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
351 latter.
352
e85a7ad5 353PH/17 Added extra conditions to the default value of delay_warning_condition
5dff5817
PH
354 so that it is now:
355
e85a7ad5
PH
356 ${if or { \
357 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
358 { match{$h_precedence:}{(?i)bulk|list|junk} } \
359 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
5dff5817
PH
360 }{no}{yes}}
361
e85a7ad5
PH
362 The Auto-Submitted: and various List- headers are standardised, whereas I
363 don't think Precedence: ever was.
5dff5817 364
d8fe1c03
PH
365PH/18 Refactored debugging code in route_finduser() to show more information,
366 in particular, the error code if getpwnam() issues one.
367
16282d2b
PH
368PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
369 This is apparently needed in addition to the PH/07 change above to avoid
370 any possible encoding problems.
371
35d40a98
PH
372PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
373 but not after initializing Perl.
374
034d99ab
PH
375PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
376 output them only if debugging. By default they are written stderr,
377 apparently, which is not desirable.
378
6ec97b1b
PH
379PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
380 queries.
381
e22ca4ac
JJ
382JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
383 --not options
384
385JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
386
33d73e3b
PH
387PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
388 authenticated or an ident call has been made. Suppress the default
389 values for $authenticated_id and $authenticated_sender (but permit -oMai
390 and -oMas) when testing with -bh.
391
9ecb03f3
PH
392PH/24 Re-jigged the order of the tests in the default configuration so that the
393 tests for valid domains and recipients precede the DNS black list and CSA
394 tests, on the grounds that those ones are more expensive.
395
084efe8d
PH
396PH/25 Exim was not testing for a space following SMTP commands such as EHLO
397 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
398 This bug exists in every version of Exim that I still have, right back to
399 0.12.
400
366fc9f0
PH
401PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
402 However, an attempt to turn on case-sensitivity in a regex key by
403 including (?-i) didn't work because the subject string was already
404 lowercased, and the effects were non-intuitive. It turns out that a
405 one-line patch can be used to allow (?-i) to work as expected.
406
c59f5781 407
c887c79e
TF
408Exim version 4.62
409-----------------
410
411TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
412 other effects) broke the use of negated acl sub-conditions.
413
1cce3af8
PH
414PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
415 patch).
416
afb3eaaf
PH
417PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
418 "Deny" causes Exim to reject the incoming connection with a 554 error.
419 Unfortunately, if there is a major crisis, such as a disk failure,
420 tcp-wrappers gives "deny", whereas what one would like would be some
421 kind of temporary error. A kludge has been added to help with this.
422 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
423 554 error is used if errno is still zero or contains ENOENT (which occurs
424 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
425 451 error is used.
426
e173618b
PH
427PH/03 Add -lutil to the default FreeBSD LIBS setting.
428
dd16e114
PH
429PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
430 errors. Otherwise a message that provokes a temporary error (when other
431 messages do not) can cause a whole host to time out.
432
f7fd3850
PH
433PH/05 Batch deliveries by appendfile and pipe transports did not work when the
434 addresses were routed directly to files or pipes from a redirect router.
435 File deliveries just didn't batch; pipe deliveries might have suffered
436 odd errors.
437
d87df92c
PH
438PH/06 A failure to get a lock for a hints database would erroneously always say
439 "Failed to get write lock", even when it was really a read lock.
440
7e9f683d
PH
441PH/07 The appendfile transport was creating MBX lock files with a fixed mode
442 of 0600. This has been changed to use the value of the lockfile_mode
443 option (which defaults to 0600).
444
bfad5236
PH
445PH/08 Applied small patch from the Sieve maintainer.
446
01c490df
PH
447PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
448 folder from quota calculations, a direct delivery into this folder messed
449 up the contents of the maildirsize file. This was because the regex was
450 used only to exclude .Trash (or whatever) when the size of the mailbox
451 was calculated. There was no check that a delivery was happening into an
452 excluded directory. This bug has been fixed by ignoring all quota
453 processing for deliveries into excluded directories.
454
d6629cdc
PH
455PH/10 Added the maildirfolder_create_regex option to appendfile.
456
1cce3af8 457
214e2000
PH
458Exim version 4.61
459-----------------
460
461PH/01 The code for finding all the local interface addresses on a FreeBSD
462 system running IPv6 was broken. This may well have applied to all BSD
463 systems, as well as to others that have similar system calls. The broken
464 code found IPv4 interfaces correctly, but gave incorrect values for the
465 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
466 that it would not match correctly against @[] and not recognize the IPv6
467 addresses as local.
468
f9daeae0
PH
469PH/02 The ipliteral router was not recognizing addresses of the form user@
470 [ipv6:....] because it didn't know about the "ipv6:" prefix.
471
7e66e54d
PH
472PH/03 Added disable_ipv6.
473
c8ea1597
PH
474PH/04 Changed $reply_address to use the raw form of the headers instead of the
475 decoded form, because it is most often used to construct To: headers
476 lines in autoreplies, and the decoded form may well be syntactically
477 invalid. However, $reply_address has leading white space removed, and all
478 newlines turned into spaces so that the autoreply transport does not
479 grumble.
480
911f6fde
PH
481PH/05 If group was specified without a user on a router, and no group or user
482 was specified on a transport, the group from the router was ignored.
483
47ca6d6c
PH
484PH/06 Increased the number of ACL variables to 20 of each type, and arranged
485 for visible compile-time settings that can be used to change these
486 numbers, for those that want even more. Backwards compatibility with old
487 spool files has been maintained. However, going back to a previous Exim
488 release will lost any variables that are in spool files.
489
ed0e9820
PH
490PH/07 Two small changes when running in the test harness: increase delay when
491 passing a TCP/IP connection to a new process, in case the original
492 process has to generate a bounce, and remove special handling of
493 127.0.0.2 (sic), which is no longer necessary.
494
eff37e47
PH
495PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
496 be the same on different OS.
497
1921d2ea
PH
498PH/09 Moved a debug statement in filter processing to avoid a race problem when
499 testing.
500
b3f69ca8
JJ
501JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
502 whether --show-vars was specified or not
503
504JJ/02 exipick: Added support for new ACL variable spool format introduced
505 in 4.61-PH/06
506
424a1c63
PH
507PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
508 syntactically invalid From: or Reply-to: line, and a filter used this to
509 generate an autoreply, and therefore failed to obtain an address for the
510 autoreply, Exim could try to deliver to a non-existent relative file
511 name, causing unrelated and misleading errors. What now happens is that
512 it logs this as a hard delivery error, but does not attempt to create a
513 bounce message.
514
7a100415
PH
515PH/11 The exinext utility has a -C option for testing purposes, but although
516 the given file was scanned by exinext itself; it wasn't being passed on
517 when Exim was called.
518
19b9dc85
PH
519PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
520 an end-of-file indication when reading a command response.
521
309bd837
PH
522PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
523 compiled. In many other places in Exim, IPv6 addresses are always
524 recognized, so I have changed this. It also means that IPv4 domain
525 literals of the form [IPV4:n.n.n.n] are now always recognized.
526
59e82a2a
PH
527PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
528 used if the router is not running as root, for example, when verifying at
529 ACL time, or when using -bh. The debugging output from this situation was
530 non-existent - all you got was a failure to exec. I have made two
531 changes:
532
533 (a) Failures to set uid/gid, the current directory, or a process leader
534 in a subprocess such as that created by queryprogram now generate
535 suitable debugging ouput when -d is set.
536
537 (b) The queryprogram router detects when it is not running as root,
538 outputs suitable debugging information if -d is set, and then runs
539 the subprocess without attempting to change uid/gid.
540
9edc04ce
PH
541PH/15 Minor change to Makefile for building test_host (undocumented testing
542 feature).
543
1349e1e5
PH
544PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
545 additional section of a DNS packet that returns MX or SRV records.
546 Instead, it always explicitly searches for A/AAAA records. This avoids
547 major problems that occur when a DNS server includes only records of one
548 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
549 fixed another bug: if SRV records were looked up and the corresponding
550 address records were *not* found in the additional section, the port
551 values from the SRV records were lost.
552
ea49d0e1
PH
553PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
554 using the correct key (the original address) when searching the retry
555 rules in order to find which one to use for generating the retry hint.
556
064a94c9
PH
557PH/18 If quota_warn_message contains a From: header, Exim now refrains from
558 adding the default one. Similarly, if it contains a Reply-To: header, the
559 errors_reply_to option, if set, is not used.
560
727071f8
PH
561PH/19 When calculating a retry time, Exim used to measure the "time since
562 failure" by looking at the "first failed" field in the retry record. Now
563 it does not use this if it is later than than the arrival time of the
564 message. Instead it uses the arrival time. This makes for better
565 behaviour in cases where some deliveries succeed, thus re-setting the
566 "first failed" field. An example is a quota failure for a huge message
567 when small messages continue to be delivered. Without this change, the
568 "time since failure" will always be short, possible causing more frequent
569 delivery attempts for the huge message than are intended.
dd16e114 570 [Note: This change was subsequently modified - see PH/04 for 4.62.]
727071f8 571
f78eb7c6
PH
572PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
573 $1, $2, $3) because the numerical variables can be reset during some
574 expansion items (e.g. "match"), thereby losing the authentication data.
575
21c28500
PH
576PH/21 Make -bV show the size of off_t variables so that the test suite can
577 decide whether to run tests for quotas > 2G.
578
579PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
580 mailbox_size, and mailbox_filecount in the appendfile transport. If a
581 filecount value is greater than 2G or if a quota value is greater than 2G
582 on a system where the size of off_t is not greater than 4, a panic error
583 is given.
584
1688f43b
PH
585PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
586 never match. The debug and -bh output now contains an explicit error
587 message indicating a malformed IPv4 address or mask.
588
589PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
590 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
591 PH/23 above applies.
592
9675b384
PH
593PH/25 Do not write to syslog when running in the test harness. The only
594 occasion when this arises is a failure to open the main or panic logs
595 (for which there is an explicit test).
596
6a3f1455
PH
597PH/26 Added the /no_tell option to "control=freeze".
598
dac79d3e
PH
599PH/27 If a host name lookup failed very early in a connection, for example, if
600 the IP address matched host_lookup and the reverse lookup yielded a name
601 that did not have a forward lookup, an error message of the form "no IP
602 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
603 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 604
5977a0b3
PH
605PH/28 An enabling patch from MH: add new function child_open_exim2() which
606 allows the sender and the authenticated sender to be set when
607 submitting a message from within Exim. Since child_open_exim() is
608 documented for local_scan(), the new function should be too.
609
c91535f3
PH
610PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
611 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
612 results in an empty string is now treated as unset.
613
0d46a8c8
PH
614PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
615
278c6e6c
PH
616PH/31 Added sender_verify_fail logging option.
617
2cbb4081
PH
618PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
619 needed by RFC 822 but not by RFC 2822 was commented out. I have now
620 tidied the source and removed it altogether.
621
3eef829e
PH
622PH/33 When a queue run was abandoned because the load average was too high, a
623 log line was always written; now it is written only if the queue_run log
624 selector is set. In addition, the log line for abandonment now contains
625 information about the queue run such as the pid. This is always present
626 in "start" and "stop" lines but was omitted from the "abandon" line.
627
1ab95fa6
PH
628PH/34 Omit spaces between a header name and the colon in the error message that
629 is given when verify = headers_syntax fails (if there are lots of them,
630 the message gets confusing).
631
230205fc
PH
632PH/35 Change the default for dns_check_names_pattern to allow slashes within
633 names, as there are now some PTR records that contain slashes. This check
634 is only to protect against broken name servers that fall over on strange
635 characters, so the fact that it applies to all lookups doesn't matter.
636
75e0e026
PH
637PH/36 Now that the new test suite is complete, we can remove some of the
638 special code in Exim that was needed for the old test suite. For example,
639 sorting DNS records because real resolvers return them in an arbitrary
640 order. The new test suite's fake resolver always returns records in the
641 same order.
642
643PH/37 When running in the test harness, use -odi for submitted messages (e.g.
644 bounces) except when queue_only is set, to avoid logging races between
645 the different processes.
646
145396a6
PH
647PH/38 Panic-die if .include specifies a non-absolute path.
648
3cd34f13
PH
649PH/39 A tweak to the "H" retry rule from its user.
650
11121d3d
JJ
651JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
652 a label. They prevented compilation on older perls.
653
654JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
655 a warning to be raised on newish perls.
656
657JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
658 on queue. Changes to match documented behaviour of showing count of
659 messages matching specified criteria.
660
8def5aaf
PH
661PH/40 Changed the default ident timeout from 30s to 5s.
662
929ba01c
PH
663PH/41 Added support for the use of login_cap features, on those BSD systems
664 that have them, for controlling the resources used by pipe deliveries.
665
2632889e
PH
666PH/42 The content-scanning code uses fopen() to create files in which to put
667 message data. Previously it was not paying any attention to the mode of
668 the files. Exim runs with umask(0) because the rest of the code creates
669 files with open(), and sets the required mode explicitly. Thus, these
670 files were ending up world-writeable. This was not a big issue, because,
671 being within the spool directory, they were not world-accessible. I have
672 created a function called modefopen, which takes an additional mode
673 argument. It sets umask(777), creates the file, chmods it to the required
674 mode, then resets the umask. All the relevant calls to fopen() in the
675 content scanning code have been changed to use this function.
676
944a9c55
PH
677PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
678 to 24 hours. This avoids potential overflow problems when processing G
679 and H retry rules. I suspect nobody ever tinkers with this value.
680
4a23603b
PH
681PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
682
4730f942
PH
683PH/45 When the plaintext authenticator is running as a client, the server's
684 challenges are checked to ensure they are valid base64 strings. By
685 default, the authentication attempt is cancelled if an invalid string is
686 received. Setting client_ignore_invalid_base64 true ignores these errors.
687 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
688 they are received. Thus, the responses can be made to depend on the
689 challenges. If an invalid string is ignored, an empty string is placed in
690 the variable.
691
30dba1e6
PH
692PH/46 Messages that are created by the autoreply transport now contains a
693 References: header, in accordance with RFCs 2822 and 3834.
694
382afc6b
PH
695PH/47 Added authenticated_sender_force to the smtp transport.
696
a86229cf
PH
697PH/48 The ${prvs expansion was broken on systems where time_t was long long.
698
50c99ba6
PH
699PH/49 Installed latest patch from the Sieve maintainer.
700
d35e429d
PH
701PH/50 When an Exim quota was set without a file count quota, and mailbox_size
702 was also set, the appendfile transport was unnecessarily scanning a
703 directory of message files (e.g. for maildir delivery) to find the count
704 of files (along with the size), even though it did not need this
705 information. It now does the scan only if it needs to find either the
706 size of the count of files.
707
f90d018c
PH
708PH/51 Added ${time_eval: to convert Exim time strings into seconds.
709
75def545
PH
710PH/52 Two bugs concerned with error handling when the smtp transport is
711 used in LMTP mode:
712
713 (i) Exim was not creating retry information for temporary errors given
714 for individual recipients after the DATA command when the smtp transport
715 was used in LMTP mode. This meant that they could be retried too
716 frequently, and not timed out correctly.
717
718 (ii) Exim was setting the flag that allows error details to be returned
719 for LMTP errors on RCPT commands, but not for LMTP errors for individual
720 recipients that were returned after the DATA command.
721
722PH/53 This is related to PH/52, but is more general: for any failing address,
723 when detailed error information was permitted to be returned to the
724 sender, but the error was temporary, then after the final timeout, only
725 "retry timeout exceeded" was returned. Now it returns the full error as
726 well as "retry timeout exceeded".
727
c46782ef
PH
728PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
729 do this, and (what is worse) MTAs that accept it.
730
71fafd95
PH
731PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
732 will now be deprecated.
733
2c5db4fd
PH
734PH/56 New os.c-cygwin from the Cygwin maintainer.
735
9cf6b11a
JJ
736JJ/06 exipick: added --unsorted option to allow unsorted output in all output
737 formats (previously only available in exim formats via -bpr, -bpru,
738 and -bpra. Now also available in native and exiqgrep formats)
739
740JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
741 with very large, slow to parse queues
742
743JJ/08 exipick: added ! as generic prefix to negate any criteria format
744
745JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
746
898d150f
PH
747PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
748 responses to authentication challenges, though it was showing the
749 challenges; (ii) I've removed the CR characters from the debug output for
750 SMTP output lines.
751
46218253
PH
752PH/58 Allow for the insertion of a newline as well as a space when a string
753 is turned into more than one encoded-word during RFC 2047 encoding. The
754 Sieve code now uses this.
755
e97957bc
PH
756PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
757 data_4xx, lost_connection, tls_required.
758
81e509d7
PH
759PH/60 When a VRFY deferred or FAILED, the log message rather than the user
760 message was being sent as an SMTP response.
761
3d240ff7
PH
762PH/61 Add -l and -k options to exicyclog.
763
b37c4101
PH
764PH/62 When verifying, if an address was redirected to one new address, so that
765 verification continued, and the new address failed or deferred after
766 having set something in $address_data, the value of $address_data was not
767 passed back to the ACL. This was different to the case when no
768 redirection occurred. The value is now passed back in both cases.
769
79378e0f
PH
770PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
771 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
772 use login_cap.h, so on its own it isn't the distinguishing feature. The
773 new name refers directly to the setclassresources() function.
774
e49c7bb4
PH
775PH/65 Added configuration files for NetBSD3.
776
d114ec46
PH
777PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
778
f3d7df6c
PH
779PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
780 is preferred over IPv4.
781
715ab376
PH
782PH/68 The bounce_return_message and bounce_return_body options were not being
783 honoured for bounces generated during the reception of non-SMTP messages.
784 In particular, this applied to messages rejected by the ACL. This bug has
785 been fixed. However, if bounce_return_message is true and bounce_return_
786 body is false, the headers that are returned for a non-SMTP message
787 include only those that have been read before the error was detected.
788 (In the case of an ACL rejection, they have all been read.)
789
6b31b150
PH
790PH/69 The HTML version of the specification is now built in a directory called
791 spec_html instead of spec.html, because the latter looks like a path with
792 a MIME-type, and this confuses some software.
793
794PH/70 Catch two compiler warnings in sieve.c.
795
d515a917
PH
796PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
797 function verify_get_ident() calls ip_connect() to connect a socket, but
798 if the "connect()" function timed out, ip_connect() used to close the
799 socket. However, verify_get_ident() also closes the socket later, and in
800 between Exim writes to the log, which may get opened at this point. When
801 the socket was closed in ip_connect(), the log could get the same file
802 descriptor number as the socket. This naturally causes chaos. The fix is
803 not to close the socket in ip_connect(); the socket should be closed by
804 the function that creates it. There was only one place in the code where
805 this was missing, in the iplookup router, which I don't think anybody now
806 uses, but I've fixed it anyway.
807
9b8fadde
PH
808PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
809 well as to direct DNS lookups. Otherwise the handling of names in host
810 lists is inconsistent and therefore confusing.
811
214e2000 812
5de37277
PH
813Exim version 4.60
814-----------------
815
cc38ddbf
PH
816PH/01 Two changes to the default runtime configuration:
817
818 (1) Move the checks for relay_from_hosts and authenticated clients from
819 after to before the (commented out) DNS black list checks.
820
821 (2) Add control=submission to the relay_from_hosts and authenticated
822 clients checks, on the grounds that messages accepted by these
823 statements are most likely to be submissions.
5de37277 824
72fdd6ae
PH
825PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
826
827 (1) Generate an error if the third argument for the ${prvs expansion is
828 not a single digit.
829
830 (2) Treat a missing third argument of ${prvscheck as if it were an empty
831 string.
832
833 (3) Reset the variables that are obtained from the first argument of
834 ${prvscheck and used in the second argument before leaving the code,
835 because their memory is reclaimed, so using them afterwards may do
836 silly things.
837
838 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
839 one (it's much easier than Tom thought :-).
840
841 (5) Because of (4), we can now allow for the use of $prvscheck_result
842 inside the third argument.
cb9328de 843
cb741023
PH
844PH/03 For some reason, the default setting of PATH when running a command from
845 a pipe transport was just "/usr/bin". I have changed it to
846 "/bin:/usr/bin".
847
f174f16e
PH
848PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
849 anything to be listed in the output from -bV.
b2f5a032 850
c25242d7
PH
851PH/05 When a filter generated an autoreply, the entire To: header line was
852 quoted in the delivery log line, like this:
853
854 => >A.N.Other <ano@some.domain> <original@ddress> ...
855
856 This has been changed so that it extracts the operative address. There
857 may be more than one such address. If so, they are comma-separated, like
858 this:
859
860 => >ano@some.domain,ona@other.domain <original@ddress> ...
861
82c19f95
PH
862PH/06 When a client host used a correct literal IP address in a HELO or EHLO
863 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
864 not being looked up in the rDNS to get a host name, Exim was showing the
865 IP address twice in Received: lines, even though the IP addresses were
866 identical. For example:
867
868 Received: from [1.2.3.4] (helo=[1.2.3.4])
869
870 However, if the real host name was known, it was omitting the HELO data
871 if it matched the actual IP address. This has been tidied up so that it
872 doesn't show the same IP address twice.
873
d7ffbc12
PH
874PH/07 When both +timestamp and +memory debugging was on, the value given by
875 $tod_xxx expansions could be wrong, because the tod_stamp() function was
876 called by the debug printing, thereby overwriting the timestamp buffer.
877 Debugging no longer uses the tod_stamp() function when +timestamp is set.
878
9f526266
PH
879PH/08 When the original message was included in an autoreply transport, it
880 always said "this is a copy of the message, including all the headers",
881 even if body_only or headers_only was set. It now gives an appropriate
882 message.
883
87fcc8b9
PH
884PH/09 Applied a patch from the Sieve maintainer which:
885
886 o fixes some comments
887 o adds the (disabled) notify extension core
888 o adds some debug output for the result of if/elsif tests
889 o points to the current vacation draft in the documentation
890 and documents the missing references header update
891
892 and most important:
893
894 o fixes a bug in processing the envelope test (when testing
895 multiple envelope elements, the last element determinted the
896 result)
897
456682f5
PH
898PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
899 Electronic Mail") by including:
900
901 Auto-submitted: auto-generated
902
903 in the messages that it generates (bounce messages and others, such as
904 warnings). In the case of bounce messages for non-SMTP mesages, there was
905 also a typo: it was using "Auto_submitted" (underscore instead of
906 hyphen). Since every message generated by Exim is necessarily in response
907 to another message, thes have all been changed to:
908
909 Auto-Submitted: auto-replied
910
911 in accordance with these statements in the RFC:
912
913 The auto-replied keyword:
914
915 - SHOULD be used on messages sent in direct response to another
916 message by an automatic process,
917
918 - MUST NOT be used on manually-generated messages,
919
920 - MAY be used on Delivery Status Notifications (DSNs) and Message
921 Disposition Notifications (MDNs),
922
923 - MUST NOT be used on messages generated by automatic or periodic
924 processes, except for messages which are automatic responses to
925 other messages.
926
3e46c1aa
PH
927PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
928 to the default Received: header definition.
456682f5 929
49826d12
PH
930PH/12 Added log selector acl_warn_skipped (default on).
931
eba0c039
PH
932PH/13 After a successful wildlsearch lookup, discard the values of numeric
933 variables because (a) they are in the wrong storage pool and (b) even if
934 they were copied, it wouldn't work properly because of the caching.
935
a0d6ba8a
PH
936PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
937 checking when decoding. Apparently there are clients that generate
938 overlong encoded strings. Why am I not surprised?
939
f0917727
PH
940PH/15 If the first argument of "${if match_address" was not empty, but did not
941 contain an "@" character, Exim crashed. Now it writes a panic log message
942 and treats the condition as false.
943
096fee00
PH
944PH/16 In autoreply, treat an empty string for "once" the same as unset.
945
024bd3c2
PH
946PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
947 extension "envelope-auth". The code is finished and in agreement with
948 other implementations, but there is no documentation so far and in fact,
949 nobody wrote the draft yet. This extension is currently #undef'ed, thus
950 not changing the active code.
951
952 Print executed "if" and "elsif" statements when debugging is used. This
953 helps a great deal to understand what a filter does.
954
955 Document more things not specified clearly in RFC3028. I had all this
956 sorted out, when out of a sudden new issues came to my mind. Oops."
957
df199fec
PH
958PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
959 (Bugzilla #53).
960
d27f1df3
PH
961PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
962 canonical form (as documented). However, after a host name lookup from
963 the IP address, check_host() was doing a simple string comparison with
964 addresses acquired from the DNS when checking that the found name did
965 have the original IP as one of its addresses. Since any found IPv6
966 addresses are likely to be in abbreviated form, the comparison could
967 fail. Luckily, there already exists a function for doing the comparison
968 by converting both addresses to binary, so now that is used instead of
969 the text comparison.
970
96776534
PH
971PH/20 There was another similar case to PH/19, when a complete host name was
972 given in a host list; looking up its IP address could give an abbreviated
973 form, whereas the current host's name might or might not be abbreviated.
974 The same fix has been applied.
975
5de37277 976
9a799bc0
PH
977Exim version 4.54
978-----------------
979
980PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
981 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
982 It now does.
983
99a4b039
PH
984PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
985 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
986
987PH/03 Typo: missing ".o" in src/pcre/Makefile.
988
4b233853
PH
989PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
990 header line, restrict the check to what is listed in RFCs 2369 and 2929.
991 Also, for "Auto-Submitted", treat anything other than "no" as
992 non-personal, in accordance with RFC 3834. (Previously it treated
993 anything starting "auto-" as non-personal.)
994
8857ccfd
PH
995TF/01 The control=submission/name=... option had a problem with syntax
996 errors if the name included a slash character. The /name= option
997 now slurps the rest of the string, so it can include any characters
998 but it must come last in the list of options (after /sender_retain
999 or /domain=).
1000
433a2980
PH
1001PH/05 Some modifications to the interface to the fake nameserver for the new
1002 testing suite.
1003
3e46c1aa 1004
9a799bc0 1005
e3a311ba
TK
1006Exim version 4.53
1007-----------------
1008
1009TK/01 Added the "success_on_redirect" address verification option. See
1010 NewStuff for rationale and an example.
1011
13b685f9
PH
1012PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1013
395ff96d
PH
1014PH/02 Patch to exigrep to allow it to work on syslog lines.
1015
5b68f6e4
PH
1016PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1017 fread() to skip over the body file's header line, because in Cygwin the
1018 header line is locked and is inaccessible.
1019
1ab52c69
PH
1020PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1021 co-exist for some time) to make it clear that it is the Exim ID that is
1022 referenced, not the Message-ID: header line.
1023
b07e6aa3
PH
1024PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1025 string_format() function, because snprintf() does not exist on all
1026 operating systems.
1027
254e032f
PH
1028PH/06 The use of forbid_filter_existstest now also locks out the use of the
1029 ${stat: expansion item.
1030
3af76a81
PH
1031PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1032 protocol synchronization error", to keep the pedants happy.
1033
2548ba04
PH
1034PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1035 well as for IRIX systems, when gcc is being used. See the host.c source
1036 file for comments.
1037
b6c6011d
PH
1038PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1039
cf39cf57
PH
1040PH/10 Named domain lists were not working if used in a queue_smtp_domains
1041 setting.
1042
f1513293
PH
1043PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1044 transport and to the smtp transport in LMTP mode.
1045
727549a4
PH
1046TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1047
af46795e
PH
1048PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1049 run a filter in a subprocess. This could lead to confusion in subsequent
1050 lookups in the parent process. There should also be a search_tidyup() at
1051 the end of the subprocess.
1052
d7b47fd0
PH
1053PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1054 only if the host matched helo_try_verify_hosts, which caused the
1055 verification to occur when the EHLO/HELO command was issued. The ACL just
1056 tested the remembered result. Now, if a previous verification attempt has
1057 not happened, "verify = helo" does it there and then.
1058
ee744174
JJ
1059JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1060
b582ab87
PH
1061TK/03 Fix log output including CR from clamd.
1062
41a13e0a
PH
1063PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1064 exist provoked a memory error which could cause a segfault.
1065
f625cc5a
PH
1066PH/15 Installed PCRE 6.2
1067
1068PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1069
21f7af35
PH
1070PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1071 of the problem. Specifically, suggested +O2 rather than +O1 for the
1072 HP-UX compiler.
1073
31480e42
PH
1074PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1075
2d280592
PH
1076PH/20 If a delivery was routed to a non-standard port by means of an SRV
1077 record, the port was not correctly logged when the outgoing_port log
1078 selector was set (it logged the transort's default port).
1079
7cd1141b
PH
1080PH/21 Added support for host-specific ports to manualroute, queryprogram,
1081 fallback_hosts, and "hosts" in the smtp transport.
1082
1083PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1084 host errors such as "Connection refused".
1085
750af86e
PH
1086PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1087 authentication with radiusclient 0.4.9:
1088
1089 - Error returned from rc_read_config was caught wrongly
1090 - Username/password not passed on to radius server due to wrong length.
1091
1092 The presumption is that some radiusclient API changes for 4.51/PH/17
1093 were not taken care of correctly. The code is still untested by me (my
1094 Linux distribution still has 0.3.2 of radiusclient), but it was
1095 contributed by a Radius user.
1096
1097PH/24 When doing a callout, the value of $domain wasn't set correctly when
1098 expanding the "port" option of the smtp transport.
1099
4304270b
TK
1100TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1101 while reading a MIME header. Thanks to Tom Hughes for a patch.
1102
750af86e
PH
1103PH/24 Include config.h inside local_scan.h so that configuration settings are
1104 available.
1105
64ffc24f
PH
1106PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1107 that in an ACL for RCPT (for example), you can examine exactly what was
1108 received.
1109
5dd9625b
PH
1110PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1111 commands, but it was not correctly comparing the address with the actual
1112 client host address. Thus, it would show the EHLO address in Received:
1113 header lines when this was not necessary.
1114
5591031b
PH
1115PH/27 Added the % operator to ${eval:}.
1116
ba18e66a
PH
1117PH/28 Exim tries to create and chdir to its spool directory when it starts;
1118 it should be ignoring failures (because with -C, for example, it has lost
1119 privilege). It wasn't ignoring creation failures other than "already
1120 exists".
1121
9cec981f
PH
1122PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1123 -bV or -d is used.
1124
aa2b5c79
PH
1125PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1126 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
1127 too many continuations, the temporary file was not being removed, and the
1128 return code was incorrect.
aa2b5c79 1129
48a53b7f
PH
1130PH/31 Missing "BOOL" in function definition in filtertest.c.
1131
1c59d63b
PH
1132PH/32 Applied Sieve patches from the maintainer.
1133
671012da
TK
1134TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1135
1509d3a8
PH
1136PH/33 Added "verify = not_blind".
1137
1138PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1139 Local/Makefile (with some defaults set). These are used in built scripts
1140 such as exicyclog, but they have never been used in the exim_install
1141 script (though there are many overriding facilities there). I have
1142 arranged that the exim_install script now takes note of these two
1143 settings.
1144
1145PH/35 Installed configuration files for Dragonfly.
1146
2fe1a124
PH
1147PH/36 When a locally submitted message by a trusted user did not contain a
1148 From: header, and the sender address was obtained from -f or from an SMTP
1149 MAIL command, and the trusted user did not use -F to supply a sender
1150 name, $originator_name was incorrectly used when constructing a From:
1151 header. Furthermore, $originator_name was used for submission mode
1152 messages from external hosts without From: headers in a similar way,
1153 which is clearly wrong.
1154
8800895a
PH
1155PH/37 Added control=suppress_local_fixups.
1156
ccfdb010
PH
1157PH/38 When log_selector = +received_sender was set, and the addition of the
1158 sender made the log line's construction buffer exactly full, or one byte
1159 less than full, an overflow happened when the terminating "\n" was
1160 subsequently added.
1161
1130bfb0
PH
1162PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1163 when the result of a list match is failure because a DNS lookup failed.
1164
ebcb507f
PH
1165PH/40 RM_COMMAND is now used in the building process.
1166
c35e155c
PH
1167PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1168 the "build-* directories that it finds.
1169
95d1f782
PH
1170PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1171 address in a domain literal was a prefix of an interface address.
1172
fd6de02e
PH
1173PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1174 when verifying a sender address, unless rewrite_headers is false.
1175
58de37c5
PH
1176PH/44 Wrote a long comment about why errors_to addresses are verified as
1177 recipients, not senders.
1178
261cf466
TF
1179TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1180 the ratelimit ACL was added.
1181
3ee512ff
PH
1182PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1183
e08c430f
PH
1184PH/46 Added extra information about PostgreSQL errors to the error string.
1185
bef5a11f
PH
1186PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1187 avoiding the need to install special zones in a real server. This is
1188 backwards compatible; if it can't find the fake resolver, it drops back.
1189 Thus, both old and new test suites can be run.
1190
7546de58
TF
1191TF/02 Added util/ratelimit.pl
1192
e5d5a95f
TF
1193TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1194 clock is set back in time.
1195
2e88a017
TF
1196TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1197 Candler <B.Candler@pobox.com>.
1198
a5f65aa4
TF
1199TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1200 OK for addresses that are the result of redirections.
1201
e7726cbf
PH
1202PH/48 A number of further additions for the benefit of the new test suite,
1203 including a fake gethostbyname() that interfaces to the fake DNS resolver
1204 (see PH/47 above).
1205
a7fdad5b
TF
1206TF/06 The fix for widen_domains has also been applied to qualify_single and
1207 search_parents which are the other dnslookup options that can cause
1208 header rewrites.
1209
6af56900
PH
1210PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1211 type ("H").
1212
0925ede6
PH
1213PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1214
66afa403
TF
1215TF/07 Exim produced the error message "an SRV record indicated no SMTP
1216 service" if it encountered an MX record with an empty target hostname.
1217 The message is now "an MX or SRV record indicated no SMTP service".
1218
0154e85a
TF
1219TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1220 if the DNS of the sending site is misconfigured. This is quite a
1221 common situation. This change restores the behaviour of treating a
1222 helo verification defer as a failure.
1223
16f12c76
PH
1224PH/51 If self=fail was set on a router, the bounce message did not include the
1225 actual error message.
1226
bbe902f0 1227
e5a9dba6
PH
1228Exim version 4.52
1229-----------------
1230
1231TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1232
22c3b60b
PH
1233PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1234 command itself ended in error, the underlying message about the transport
1235 filter timeout was being overwritten with the pipe command error. Now the
1236 underlying error message should be appended to the second error message.
1237
06a9b4b5
PH
1238TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1239
c1ac6996
PH
1240PH/02 Reduce the amount of output that "make" produces by default. Full output
1241 can still be requested.
1242
9c7a242c
PH
1243PH/03 The warning log line about a condition test deferring for a "warn" verb
1244 was being output only once per connection, rather than after each
1245 occurrence (because it was using the same function as for successful
1246 "warn" verbs). This seems wrong, so I have changed it.
1247
87ba3f5f
PH
1248TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1249 it should not have, which might have caused a crash in the right
1250 circumstances, but probably never did.
1251
1252PH/04 Installed a modified version of Tony Finch's patch to make submission
1253 mode fix the return path as well as the Sender: header line, and to
1254 add a /name= option so that you can make the user's friendly name appear
1255 in the header line.
1256
29aba418
TF
1257TF/03 Added the control = fakedefer ACL modifier.
1258
fe0dab11
TF
1259TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1260 Mark Lowes for thorough testing.
870f6ba8 1261
11d337a4
TK
1262TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1263
1264TK/03 Merged latest SRS patch from Miles Wilton.
1265
415c8f3b
PH
1266PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1267 with the definition in sysexits.h (which is #included earlier).
1268 Fortunately, Exim does not actually use EX_OK. The code used to try to
1269 preserve the sysexits.h value, by assumimg that macro definitions were
1270 scanned for macro replacements. I have been disabused of this notion,
1271 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 1272
958541e9
PH
1273PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1274 in the smtp transport. When a block could not be written in a single
1275 write() function, the timeout was being re-applied to each part-write.
1276 This seems wrong - if the receiver was accepting one byte at a time it
1277 would take for ever. The timeout is now adjusted when this happens. It
1278 doesn't have to be particularly precise.
1279
c206415f
TK
1280TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1281 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1282
2a4be8f9
PH
1283PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1284 without a domain if the check to <postmaster@domain> fails.
1285
1cba11c5
SC
1286SC/01 Eximstats: added -xls and the ability to specify output files
1287 (patch written by Frank Heydlauf).
1288
1289SC/02 Eximstats: use FileHandles for outputing results.
1290
1291SC/03 Eximstats: allow any combination of xls, txt, and html output.
1292
1293SC/04 Eximstats: fixed display of large numbers with -nvr option
1294
1295SC/05 Eximstats: fixed merging of reports with empty tables.
1296
1297SC/06 Eximstats: added the -include_original_destination flag
1298
1299SC/07 Eximstats: removed tabs and trailing whitespace.
1300
1005d00e
TK
1301TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1302
1303TK/06 MBOX spool code: Add real "From " MBOX separator line
1304 so the .eml file is really in mbox format (even though
1305 most programs do not really care). Patch from Alex Miller.
1306
1307TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1308 The latter is generated from $received_to and is only set if the
1309 message has one envelope recipient. SA can use these headers,
1310 obviously out-of-the-box. Patch from Alex Miller.
1311
9b4768fa
PH
1312PH/08 The ${def test on a variable was returning false if the variable's
1313 value was "0", contrary to what the specification has always said!
1314 The result should be true unless the variable is empty.
1315
1316PH/09 The syntax error of a character other than { following "${if
1317 def:variable_name" (after optional whitespace) was not being diagnosed.
1318 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1319 accidental colon was present, for example, could give incorrect results.
1320
0d7eb84a
PH
1321PH/10 Tidied the code in a number of places where the st_size field of a stat()
1322 result is used (not including appendfile, where other changes are about
1323 to be made).
1324
1325PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1326 This involved changing a lot of size variables from int to off_t. It
1327 should work with maildirs and everything.
1328
40727bee
TK
1329TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1330 spamd dying while we are connected to it.
1331
554d2369
TF
1332TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1333 <jgh@wizmail.org>
1334
1f922db1
PH
1335PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1336 function for BDB 4.3.
1337
ef213c3b
PH
1338PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1339
8ac170f3
PH
1340PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1341 the sources for PCRE have been re-arranged and more files are now
1342 involved.
1343
b1c749bb
PH
1344PH/15 The code I had for printing potentially long long variables in PH/11
1345 above was not the best (it lost precision). The length of off_t variables
1346 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
1347 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1348 to be "long long int" or "long int". This is needed for the internal
1349 formatting function string_vformat().
b1c749bb 1350
4aac9b49
PH
1351PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1352 the configuration file to be ":syslog", then the script "guesses" where
1353 the logs files are, rather than using the compiled in default. In our
1354 case the guess is not the same as the compiled default, so the script
1355 suddenly stopped working when I started to use syslog. The patch checks
1356 to see if log_file_path is "". If so, it attempts to read it from exim
1357 with no configuration file to get the compiled in version, before it
1358 falls back to the previous guessing code."
1359
294520c8
TK
1360TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1361 implementing BATV in an Exim configuration. See NewStuff for the gory
1362 details.
1363
5bd022fe
PH
1364PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1365 Makefile that are specific to HP-UX.
1366
90e9ce59
PH
1367PH/18 If the "use_postmaster" option was set for a recipient callout together
1368 with the "random" option, the postmaster address was used as the MAIL
1369 FROM address for the random test, but not for the subsequent recipient
1370 test. It is now used for both.
1371
5ea81592
PH
1372PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1373 patch removes a few documentation additions to RFC 3028, because the
1374 latest draft now contains them. It adds the new en;ascii-case comparator
1375 and a new error check for 8bit text in MIME parts. Comparator and
1376 require names are now matched exactly. I enabled the subaddress
1377 extension, but it is not well tested yet (read: it works for me)."
1378
c6c2dc1d
PH
1379PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1380 rework some of the code of TK/09 above to avoid the hardwired use of
1381 "%lld" and "long long". Replaced the call to snprintf() with a call to
1382 string_vformat().
1383
fffffe4c
PH
1384PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1385 records point to non-existent hosts", "retry timeout exceeded", and
1386 "retry time not reached for any host after a long failure period".
ca02eafb 1387
9a26b6b2
PH
1388PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1389 experimental DomainKeys support:
1390
1391 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1392 (2) On an error such as an illegally used "control", the wrong name for
1393 the control was given.
1394
1395 These problems did NOT occur unless DomainKeys support was compiled.
1396
4aee0225
PH
1397PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1398
32d668a5
PH
1399PH/24 Added ${if match_ip condition.
1400
8187c3f3
PH
1401PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1402 databases so that it will be absolutely obvious if a crash occurs in the
1403 DB library. This is a regular occurrence (often caused by mis-matched
1404 db.h files).
1405
ff790e47 1406PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
1407 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1408 picked up on a user's system that detects such things. There doesn't seem
1409 to be a gcc warning option for this - only an attribute that has to be
1410 put on the function's prototype. It seems that in Fedora Core 4 they have
1411 set this on a number of new functions. No doubt there will be more in due
1412 course.
ff790e47 1413
5417f6d1
PH
1414PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1415 specify a transport. However, if an address that was verified by such a
1416 router was the subject of a callout, Exim crashed because it tried to
1417 read the rcpt_include_affixes from the non-existent transport. Now it
1418 just assumes that the setting of that option is false. This bug was
1419 introduced by 4.51/PH/31.
1420
59cf8544
PH
1421PH/28 Changed -d+all to exclude +memory, because that information is very
1422 rarely of interest, but it makes the output a lot bigger. People tend to
1423 do -d+all out of habit.
1424
e7ad8a65
PH
1425PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1426 code in os-type was giving problems when libc.so lives in lib64, like on
1427 x86_64 Fedora Core.
1428
ade42478
PH
1429PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1430 aren't the modern standard, and it seems that some systems' include files
1431 don't always have them. Exim was already checking for some of the newer
1432 ones like T_AAAA, and defining it itself. I've added checks for all the
1433 record types that Exim uses.
1434
182ad5cf
PH
1435PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1436 not automatically generating a new one, as it is supposed to. This
1437 prevented TLS from working. If the file did exist, but contained invalid
1438 data, a new version was generated, as expected. It was only the case of a
1439 non-existent file that was broken.
1440
b0d9fc80
TK
1441TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1442 with a change in libdomainkeys > 0.64.
1443
1444TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1445 from DNS. If the selector record carries the flag, it now has
1446 precedence over the domain-wide flag.
1447
1448TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1449
47c7a64a
PH
1450PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1451 the use of a port name that isn't defined in /etc/services) occurred, the
1452 message was deferred as in a normal delivery, and thus remained on the
1453 spool, instead of being failed because of the mua_wrapper setting. This
1454 is now fixed, and I tidied up some of the mua_wrapper messages at the
1455 same time.
1456
a388bce4
SC
1457SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1458 the messages in a hash of arrays rather than using individual hashes.
1459 This is a bit cleaner and results in dramatic memory savings, albeit
1460 at a slight CPU cost.
1461
1462SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1463 as requested by Marc Sherman.
1464
1465SC/10 Eximstats: added histograms for user specified patterns as requested
1466 by Marc Sherman.
1467
0793e4ed
SC
1468SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1469
c58b88df
PH
1470PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1471 fopen() in the content-scanning modules that did not already have it.
1472
e7ad8a65 1473
7982096b
PH
1474Exim version 4.51
1475-----------------
1476
1a46a8c5
PH
1477TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1478 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1479
2f079f46 1480TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
1481
1482TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1483
1484PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1485 to test Sieve filters that use "vacation".
1486
1487PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1488 that changes the way the GnuTLS parameters are stored in the cache file.
1489 The new format can be generated externally. For backward compatibility,
1490 if the data in the cache doesn't make sense, Exim assumes it has read an
1491 old-format file, and it generates new data and writes a new file. This
1492 means that you can't go back to an older release without removing the
1493 file.
1494
1495PH/03 A redirect router that has both "unseen" and "one_time" set does not
1496 work if there are any delivery delays because "one_time" forces the
1497 parent to be marked "delivered", so its unseen clone is never tried
1498 again. For this reason, Exim now forbids the simultaneous setting of
1499 these two options.
1500
1501PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1502 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1503 entry if you want to know the details. The fix, however, neglected to
1504 consider the case when local delivery batching is involved. The test for
1505 "previously delivered" was not happening when checking to see if an
1506 address could be batched with a previous (undelivered) one; under
1507 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1508 address.
1a46a8c5
PH
1509
1510PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1511 in its include files, and this causes problems building Exim.
1512
1513PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1514 header_syntax) but Exim was just ignoring anything given after a slash.
1515 In particular, this caused confusion with an attempt to use "verify =
1516 reverse_host_lookup/defer_ok". An error is now given when options are
1517 supplied for verify items that do not have them. (Maybe reverse_host_
1518 lookup should have a defer_ok option, but that's a different point.)
1519
1520PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1521 defined by RFC 821) to 2048, because there were problems with some AUTH
1522 commands, and RFC 1869 says the size should be increased for extended
1523 SMTP commands that take arguments.
1524
1525PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1526 Finch).
1527
1528PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1529 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1530
49c2d5ea
PH
1531PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1532 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1533 whatever). Otherwise the password may appear in the log. Following change
1534 PH/42 below, there is no longer a chance of it appearing in a bounce
1535 message.
49c2d5ea 1536
bf759a8b
PH
1537PH/11 Installed exipick version 20050225.0 from John Jetmore.
1538
83364d30
PH
1539PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1540 of its addresses was ever tried. (Bugzilla bug #2.)
1541
7999bbd7
PH
1542PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1543 the result incorrectly in the debug output. (It correctly added a newline
1544 to what was transported.)
1545
7dbf77c9
PH
1546TF/01 Added $received_time.
1547
74e0617f
PH
1548PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1549 commented out examples of how to interface to a virus scanner and to
1550 SpamAssassin. Also added commented examples of av_scanner and
1551 spamd_address settings.
1552
2f079f46
PH
1553PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1554 and controls are allowed in which ACLs. There were a couple of minor
1555 errors. Some of the entries in the conditions table (which is a table of
1556 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1557 negation of where the condition IS allowed.
1558
8c841523
PH
1559PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1560
7766a4f0
PH
1561PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1562 header file does not have a version number, so I've had to invent a new
1563 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1564 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1565 radiusclient), but it was contributed by a Radius user.
1566
8b417f2c
PH
1567PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1568 files or directories, for OpenSSL.
1569
901f42cb
PH
1570PH/19 When an Exim process that is running as root has to create an Exim log
1571 file, it does so in a subprocess that runs as exim:exim so as to get the
1572 ownership right at creation (otherwise, other Exim processes might see
1573 the file with the wrong ownership). There was no test for failure of this
1574 fork() call, which would lead to the process getting stuck as it waited
1575 for a non-existent subprocess. Forks do occasionally fail when resources
1576 run out. I reviewed all the other calls to fork(); they all seem to check
1577 for failure.
1578
f9b9210e
PH
1579PH/20 When checking for unexpected SMTP input at connect time (before writing
1580 the banner), Exim was not dealing correctly with a non-positive return
1581 from the read() function. If the client had disconnected by this time,
1582 the result was a log entry for a synchronization error with an empty
1583 string after "input=" when read() returned zero. If read() returned -1
1584 (an event I could not check), uninitialized data bytes were printed.
1585 There were reports of junk text (parts of files, etc) appearing after
1586 "input=".
1587
54cdb463
PH
1588PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1589
cf00dad6
PH
1590PH/22 Added support for macro redefinition, and (re)definition in between
1591 driver and ACL definitions.
1592
acb1b346
PH
1593PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1594 forgetting to use the resulting value; it was using the unexpanded value.
1595
c5ddb310
PH
1596PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1597 hadn't been configured. The fix is from Juergen Kreileder, who
1598 understands it better than I do:
1599
1600 "Here's what I see happening with three configured cyrus_sasl
1601 authenticators configured (plain, login, cram-md5):
1602
1603 On startup auth_cyrus_sasl_init() gets called for each of these.
1604 This means three calls to sasl_listmech() without a specified mech_list.
1605 => SASL tests which mechs of all available mechs actually work
1606 => three warnings about OTP not working
1607 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1608
1609 With the patch, sasl_listmech() also gets called three times. But now
1610 SASL's mech_list option is set to the server_mech specified in the the
1611 authenticator. Or in other words, the answer from sasl_listmech()
1612 gets limited to just the mech you're testing for (which is different
1613 for each call.)
1614 => the return list contains just 'plain' or 'login', 'cram-md5' or
1615 nothing depending on the value of ob->server_mech.
1616
1617 I've just tested the patch: Authentication still works fine,
1618 unavailable mechs specified in the exim configuration are still
1619 caught, and the auth.log warnings about OTP are gone."
1620
31619da6
PH
1621PH/25 When debugging is enabled, the contents of the command line are added
1622 to the debugging output, even when log_selector=+arguments is not
1623 specified.
1624
bebaf0fc
PH
1625PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1626 answer is "GNU", and only if the return is "GNU/something" is the answer
1627 "Linux".
1628
475fe28a
PH
1629PH/27 $acl_verify_message is now set immediately after the failure of a
1630 verification in an ACL, and so is available in subsequent modifiers. In
1631 particular, the message can be preserved by coding like this:
1632
1633 warn !verify = sender
1634 set acl_m0 = $acl_verify_message
1635
1636 Previously, $acl_verify_message was set only while expanding "message"
1637 and "log_message" when a very denied access.
1638
7e8bec7a
PH
1639PH/28 Modified OS/os.c-Linux with
1640
1641 -#ifndef OS_LOAD_AVERAGE
1642 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1643
1644 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1645 nomenclature these days.)
1646
e4a89c47
PH
1647PH/29 Installed patch from the Sieve maintainer that adds the options
1648 sieve_useraddress and sieve_subaddress to the redirect router.
1649
5ca2a9a1
PH
1650PH/30 In these circumstances:
1651 . Two addresses routed to the same list of hosts;
1652 . First host does not offer TLS;
1653 . First host accepts first address;
1654 . First host gives temporary error to second address;
1655 . Second host offers TLS and a TLS session is established;
1656 . Second host accepts second address.
1657 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1658 and peerdn, if requested) that were in fact used only for the second
1659 address.
7e8bec7a 1660
c688b954
PH
1661PH/31 When doing a callout as part of verifying an address, Exim was not paying
1662 attention to any local part prefix or suffix that was matched by the
1663 router that accepted the address. It now behaves in the same way as it
1664 does for delivery: the affixes are removed from the local part unless
1665 rcpt_include_affixes is set on the transport.
1666
fed77020
PH
1667PH/32 Add the sender address, as F=<...>, to the log line when logging a
1668 timeout during the DATA phase of an incoming message.
1669
7fe1560f
PH
1670PH/33 Sieve envelope tests were broken for match types other than :is. I have
1671 applied a patch sanctioned by the Sieve maintainer.
c688b954 1672
ebb6e6d5
PH
1673PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1674 the uid or gid is negative. A case of a negative gid caused this to be
1675 noticed. The fix allows for either to be negative.
1676
9c4e8f60
PH
1677PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1678 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1679 overlooked.
1680
1681PH/36 The change PH/12 above was broken. Fixed it.
1682
d7174846
PH
1683PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1684 the grounds that routing the same address twice would always produce the
1685 same answer. This might have been true once, but it is certainly no
1686 longer true now. Routing a child address may depend on the previous
1687 routing that produced that child. Some complicated redirection strategies
1688 went wrong when messages had multiple recipients, and made Exim's
1689 behaviour dependent on the order in which the addresses were given.
1690
1691 I have moved the duplicate checking until after the routing is complete.
1692 Exim scans the addresses that are assigned to local and remote
1693 transports, and removes any duplicates. This means that more work will be
1694 done, as duplicates will always all be routed, but duplicates are
1695 presumably rare, so I don't expect this is of any significance.
1696
1697 For deliveries to pipes, files, and autoreplies, the duplicate checking
1698 still happens during the routing process, since they are not going to be
1699 routed further.
1700
cfe75fc3
PH
1701PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1702 It corrects a timeout issue with spamd. This is Ian's comment: "The
1703 background is that sometimes spamd either never reads data from a
1704 connection it has accepted, or it never writes response data. The exiscan
1705 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1706 blindly assumes that writes won't block so it may never time out."
1707
be22d70e
PH
1708PH/39 Allow G after quota size as well as K and M.
1709
0612b098
PH
1710PH/40 The value set for $authenticated_id in an authenticator may not contain
1711 binary zeroes or newlines because the value is written to log lines and
1712 to spool files. There was no check on this. Now the value is run through
1713 the string_printing() function so that such characters are converted to
1714 printable escape sequences.
1715
2e0c1448
PH
1716PH/41 $message_linecount is a new variable that contains the total number of
1717 lines in the message. Compare $body_linecount, which is the count for the
1718 body only.
1719
447d236c
PH
1720PH/42 Exim no longer gives details of delivery errors for specific addresses in
1721 bounce and delay warning messages, except in certain special cases, which
1722 are as follows:
1723
1724 (a) An SMTP error message from a remote host;
1725 (b) A message specified in a :fail: redirection;
1726 (c) A message specified in a "fail" command in a system filter;
1727 (d) A message specified in a FAIL return from the queryprogram router;
1728 (e) A message specified by the cannot_route_message router option.
1729
1730 In these cases only, Exim does include the error details in bounce and
1731 warning messages. There are also a few cases where bland messages such
1732 as "unrouteable address" or "local delivery error" are given.
1733
d20976dc
PH
1734PH/43 $value is now also set for the "else" part of a ${run expansion.
1735
f656d135
PH
1736PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1737 being worked on, but at least Exim now implements the latest version to
1738 play with."
1739
2e2a30b4
PH
1740PH/45 In a pipe transport, although a timeout while waiting for the pipe
1741 process to complete was treated as a delivery failure, a timeout while
1742 writing the message to the pipe was logged, but erroneously treated as a
1743 successful delivery. Such timeouts include transport filter timeouts. For
1744 consistency with the overall process timeout, these timeouts are now
1745 treated as errors, giving rise to delivery failures by default. However,
1746 there is now a new Boolean option for the pipe transport called
1747 timeout_defer, which, if set TRUE, converts the failures into defers for
1748 both kinds of timeout. A transport filter timeout is now identified in
1749 the log output.
1750
9176e9f0
PH
1751PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1752 systems where "make" and "gmake" are different, calling "gmake" at top
1753 level broke things. I've arranged for the value of $(MAKE) to be passed
1754 from the Makefile to this script so that it can call the same version of
1755 "make".
1756
7982096b 1757
bbe902f0
PH
1758A note about Exim versions 4.44 and 4.50
1759----------------------------------------
1760
1761Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1762changes of various kinds. As a consequence, a big documentation update was
1763needed. This delayed the release for rather longer than seemed good, especially
1764in the light of a couple of (minor) security issues. Therefore, the changes
1765that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1766release. So 4.44 and 4.50 are in effect two different branches that both start
1767from 4.43.
1768
1769I have left the 4.50 change log unchanged; it contains all the changes since
17704.43. The change log for 4.44 is below; many of its items are identical to
1771those for 4.50. This seems to be the most sensible way to preserve the
1772historical information.
1773
1774
f7b63901 1775Exim version 4.50
495ae4b0
PH
1776-----------------
1777
5fe762f6
PH
1778 1. Minor wording change to the doc/README.SIEVE file.
1779
139059f6 1780 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1781 computation of the current number of files was incorrect.
495ae4b0 1782
7086e875
PH
1783 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1784 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1785 place.
1786
35af9f61
PH
1787 4. Give more explanation in the error message when the command for a transport
1788 filter fails to execute.
1789
b668c215
PH
1790 5. There are several places where Exim runs a non-Exim command in a
1791 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1792 was being done only for the command run by the queryprogram router. It is
1793 now done for all such subprocesses. The other cases are: ${run, transport
1794 filters, and the commands run by the lmtp and pipe transports.
1795
a494b1e1
PH
1796 6. Added CONFIGURE_GROUP build-time option.
1797
1798 7. Some older OS have a limit of 256 on the maximum number of file
1799 descriptors. Exim was using setrlimit() to set 1000 as a large value
1800 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1801 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1802
c5fcb476
PH
1803 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1804 was an oversight, and furthermore, ever since the addition of extra
1805 controls (e.g. 4.43/32), the checks on when to allow different forms of
1806 "control" were broken. There should now be diagnostics for all cases when a
1807 control that does not make sense is encountered.
1808
69358f02
PH
1809 9. Added the /retain_sender option to "control=submission".
1810
5be20824
PH
181110. $recipients is now available in the predata ACL (oversight).
1812
eb2c0248
PH
181311. Tidy the search cache before the fork to do a delivery from a message
1814 received from the command line. Otherwise the child will trigger a lookup
1815 failure and thereby defer the delivery if it tries to use (for example) a
1816 cached ldap connection that the parent has called unbind on.
1817
2a3eea10
PH
181812. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1819 of $address_data from the recipient verification was clobbered by the
1820 sender verification.
1821
182213. The value of address_data from a sender verification is now available in
1823 $sender_address_data in subsequent conditions in the ACL statement.
1824
23c7ff99
PH
182514. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1826
4deaf07d
PH
182715. Added a new option "connect=<time>" to callout options, to set a different
1828 connection timeout.
1829
926e1192
PH
183016. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1831 was its contents. (It was OK if the option was not defined at all.)
1832
650edc6f
PH
183317. A "Completed" log line is now written for messages that are removed from
1834 the spool by the -Mrm option.
1835
2c7db3f5
PH
183618. New variables $sender_verify_failure and $recipient_verify_failure contain
1837 information about exactly what failed.
1838
3d235903
PH
183919. Added -dd to debug only the daemon process.
1840
7c7ad977
PH
184120. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1842 handles timeouts, both on the server side and network timeouts. Renamed the
1843 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1844
981756db
PH
184521. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1846 It is now set to "smtps".
1847
d4eb88df
PH
184822. $host_address is now set to the target address during the checking of
1849 ignore_target_hosts.
1850
185123. When checking ignore_target_hosts for an ipliteral router, no host name was
1852 being passed; this would have caused $sender_host_name to have been used if
1853 matching the list had actually called for a host name (not very likely,
1854 since this list is usually IP addresses). A host name is now passed as
1855 "[x.x.x.x]".
1856
7d468ab8
PH
185724. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1858 code that specifies a non-restarting handler (typically sigaction() in
1859 modern systems) in an attempt to fix a rare and obscure crash bug.
1860
186125. Narrowed the window for a race in the daemon that could cause it to ignore
1862 SIGCHLD signals. This is not a major problem, because they are used only to
1863 wake it up if nothing else does.
1864
62c0818f
PH
186526. A malformed maildirsize file could cause Exim to calculate negative values
1866 for the mailbox size or file count. Odd effects could occur as a result.
1867 The maildirsize information is now recalculated if the size or filecount
1868 end up negative.
1869
26034054
PH
187027. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1871 support for a long time. Removed HAVE_SYS_VFS_H.
1872
af66f652
PH
187328. Installed the latest version of exipick from John Jetmore.
1874
90af77f4
PH
187529. In an address list, if the pattern was not a regular expression, an empty
1876 subject address (from a bounce message) matched only if the pattern was an
1877 empty string. Non-empty patterns were not even tested. This was the wrong
1878 because it is perfectly reasonable to use an empty address as part of a
1879 database query. An empty address is now tested by patterns that are
1880 lookups. However, all the other forms of pattern expect the subject to
1881 contain a local part and a domain, and therefore, for them, an empty
1882 address still always fails if the pattern is not itself empty.
1883
d8ef3577
PH
188430. Exim went into a mad DNS loop when attempting to do a callout where the
1885 host was specified on an smtp transport, and looking it up yielded more
1886 than one IP address.
1887
5cb8cbc6
PH
188831. Re-factored the code for checking spool and log partition space into a
1889 function that finds that data and another that does the check. The former
1890 is then used to implement four new variables: $spool_space, $log_space,
1891 $spool_inodes, and $log_inodes.
1892
14702f5b
PH
189332. The RFC2047 encoding function was originally intended for short strings
1894 such as real names; it was not keeping to the 75-character limit for
1895 encoded words that the RFC imposes. It now respects the limit, and
1896 generates multiple encoded words if necessary. To be on the safe side, I
1897 have increased the buffer size for the ${rfc2047: expansion operator from
1898 1024 to 2048 bytes.
1899
063b1e99
PH
190033. It is now permitted to omit both strings after an "if" condition; if the
1901 condition is true, the result is "true". As before, when the second string
1902 is omitted, a false condition yields an empty string. This makes it less
1903 cumbersome to write custom ACL and router conditions.
1904
652e1b65
PH
190534. Failure to deliver a bounce message always caused it to be frozen, even if
1906 there was an errors_to setting on the router. The errors_to setting is now
1907 respected.
1908
6f0c9a4f
PH
190935. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1910 canonical form (fully expanded) before being placed in
1911 $sender_host_address.
1912
33397d19
PH
191336. The table in the code that translates DNS record types into text (T_A to
1914 "A" for instance) was missing entries for NS and CNAME. It is just possible
1915 that this could have caused confusion if both these types were looked up
1916 for the same domain, because the text type is used as part of Exim's
1917 per-process caching. But the chance of anyone hitting this buglet seems
1918 very small.
1919
7bb56e1f
PH
192037. The dnsdb lookup has been extended in a number of ways.
1921
1922 (1) There is a new type, "zns", which walks up the domain tree until it
1923 finds some nameserver records. It should be used with care.
1924
ea3bc19b
PH
1925 (2) There is a new type, "mxh", which is like "mx" except that it returns
1926 just the host names, not the priorities.
1927
1928 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1929 looked up. The behaviour when one of the lookups defers can be
1930 controlled by a keyword.
7bb56e1f 1931
ea3bc19b 1932 (4) It is now possible to specify the separator character for use when
7bb56e1f 1933 multiple records are returned.
33397d19 1934
0bcb2a0e
PH
193538. The dnslists ACL condition has been extended: it is now possible to supply
1936 a list of IP addresses and/or domains to be looked up in a particular DNS
1937 domain.
1938
2ac0e484
PH
193939. Added log_selector=+queue_time_overall.
1940
4e1fde53
PH
194140. When running the queue in the test harness, wait just a tad after forking a
1942 delivery process, to get repeatability of debugging output.
1943
de365ded
PH
194441. Include certificate and key file names in error message when GnuTLS fails
1945 to set them up, because the GnuTLS error message doesn't include the name
1946 of the failing file when there is a problem reading it.
1947
f05da2e8
PH
194842. Allow both -bf and -bF in the same test run.
1949
d6453af2
PH
195043. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1951
f7b63901
PH
195244. The "Exiscan patch" is now merged into the mainline Exim source.
1953
195445. Sometimes the final signoff response after QUIT could fail to get
1955 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1956 < 0 before doing a fflush(). This bug looks as though it goes back to the
1957 introduction of TLS in release 3.20, but "sometimes" must have been rare
1958 because the tests only now provoked it.
1959
a444213a
PH
196046. Reset the locale to "C" after calling embedded Perl, in case it was changed
1961 (this can affect the format of dates).
1962
0ec020ea
PH
196347. exim_tidydb, when checking for the continued existence of a message for
1964 which it has found a message-specific retry record, was not finding
1965 messages that were in split spool directories. Consequently, it was
1966 deleting retry records that should have stayed in existence.
1967
b1206957
PH
196848. Steve fixed some bugs in eximstats.
1969
197049. The SPA authentication driver was not abandoning authentication and moving
1971 on to the next authenticator when an expansion was forced to fail,
1972 contradicting the general specification for all authenticators. Instead it
1973 was generating a temporary error. It now behaves as specified.
1974
26dd5a95
PH
197550. The default ordering of permitted cipher suites for GnuTLS was pessimal
1976 (the order specifies the preference for clients). The order is now AES256,
1977 AES128, 3DES, ARCFOUR128.
1978
343b2385
PH
197951. Small patch to Sieve code - explicitly set From: when generating an
1980 autoreply.
1981
1c5466b9
PH
198252. Exim crashed if a remote delivery caused a very long error message to be
1983 recorded - for instance if somebody sent an entire SpamAssassin report back
1984 as a large number of 550 error lines. This bug was coincidentally fixed by
1985 increasing the size of one of Exim's internal buffers (big_buffer) that
1986 happened as part of the Exiscan merge. However, to be on the safe side, I
1987 have made the code more robust (and fixed the comments that describe what
1988 is going on).
1989
55ee9ee3
PH
199053. Now that there can be additional text after "Completed" in log lines (if
1991 the queue_time_overall log selector is set), a one-byte patch to exigrep
1992 was needed to allow it to recognize "Completed" as not the last thing in
1993 the line.
1994
d38f8232
PH
199554. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1996 patch that reportedly fixes this has been added. I am not expert enough to
1997 create a test for it. This is what the patch creator wrote:
1998
1999 "I found a little strange behaviour of ldap code when working with
2000 Windows 2003 AD Domain, where users was placed in more than one
2001 Organization Units. When I tried to give exim partial DN, the exit code
2002 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2003 But simultaneously result of request was absolutely normal ldap result,
2004 so I produce this patch..."
2005
3295e65b
PH
2006 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2007 REFERENCE, so I have modified the code to exclude the patch when that macro
2008 is not defined.
2009
7102e136
PH
201055. Some experimental protocols are using DNS PTR records for new purposes. The
2011 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
2012 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2013 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 2014 CAN-2005-0021
7102e136 2015
3ca0ba97
PH
201656. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2017
c2bcbe20
PH
201857. Double the size of the debug message buffer (to 2048) so that more of very
2019 long debug lines gets shown.
2020
18ce445d
PH
202158. The exicyclog utility now does better if the number of log files to keep
2022 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2023
1f5b4c3d
PH
202459. Two changes related to the smtp_active_hostname option:
2025
2026 (1) $smtp_active_hostname is now available as a variable.
2027 (2) The default for smtp_banner uses $smtp_active_hostname instead
2028 of $primary_hostname.
2029
b975ba52
PH
203060. The host_aton() function is supposed to be passed a string that is known
2031 to be a valid IP address. However, in the case of IPv6 addresses, it was
2032 not checking this. This is a hostage to fortune. Exim now panics and dies
2033 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
2034 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2035 components; fortuitously, this particular loophole had already been fixed
2036 by change 4.50/55 above.
2037
2038 If there are any other similar loopholes, the new check in host_aton()
2039 itself should stop them being exploited. The report I received stated that
2040 data on the command line could provoke the exploit when Exim was running as
2041 exim, but did not say which command line option was involved. All I could
2042 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2043 running as the user.
ea3a6f44 2044 CAN-2005-0021
85b87bc2
PH
2045
204661. There was a buffer overflow vulnerability in the SPA authentication code
2047 (which came originally from the Samba project). I have added a test to the
2048 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 2049 CAN-2005-0022
b975ba52 2050
17ffcae7
PH
205162. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2052 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2053
d95f9fdb
PH
205463. The daemon start-up calls getloadavg() while still root for those OS that
2055 need the first call to be done as root, but it missed one case: when
2056 deliver_queue_load_max is set with deliver_drop_privilege. This is
2057 necessary for the benefit of the queue runner, because there is no re-exec
2058 when deliver_drop_privilege is set.
2059
86b8287f
PH
206064. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2061 This has been fixed.
2062
60dc5e56
PH
206365. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2064 was in use, was not putting the data itself into the right store pool;
2065 consequently, it could be overwritten for a subsequent message in the same
2066 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2067 the caching.)
2068
533244af
PH
206966. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2070
a5a28604
PH
207167. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2072 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2073 the function were treating the return as a boolean value, which happened to
2074 work because 0=false and not-0=true, but is not correct code.
2075
7e634d24
PH
207668. The host_aton() function was not handling scoped IPv6 addresses (those
2077 with, for example, "%eth0" on the end) correctly.
2078
3e11c26b
PH
207969. Fixed some compiler warnings in acl.c for the bitmaps specified with
2080 negated items (that is, ~something) in unsigned ints. Some compilers
2081 apparently mutter when there is no cast.
2082
6729cf78
PH
208370. If an address verification called from an ACL failed, and did not produce a
2084 user-specific message (i.e. there was only a "system" message), nothing was
2085 put in $acl_verify_message. In this situation, it now puts the system
2086 message there.
2087
00f00ca5
PH
208871. Change 4.23/11 added synchronization checking at the start of an SMTP
2089 session; change 4.31/43 added the unwanted input to the log line - except
2090 that it did not do this in the start of session case. It now does.
2091
c9bdd01c
PH
209272. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2093 This is wrong and can cause the other end to generate a synchronization
2094 error if it is another Exim or anything else that does the synchronization
2095 check. A QUIT command is no longer sent after a timeout.
2096
d43194df
PH
209773. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2098 during host lookups.
2099
fe5b5d0b
PH
210074. The defer_ok option of callout verification was not working if it was used
2101 when verifying addresses in header lines, that is, for this case:
2102
2103 verify = header_sender/callout=defer_ok
2104
76a2d7ba
PH
210575. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2106 those file descriptors could be used for SMTP connections. If anything
2107 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2108 could be sent to the SMTP client, causing chaos. The daemon now opens
2109 stdin, stdout, and stderr to /dev/null when it puts itself into the
2110 background.
2111
211276. Arrange for output from Perl's "warn" command to be written to Exim's main
2113 log by default. The user can override this with suitable Perl magic.
2114
04f7d5b9
PH
211577. The use of log_message on a "discard" ACL verb, which is supposed to add to
2116 the log message when discard triggers, was not working for the DATA ACL or
2117 for the non-SMTP ACL.
2118
bc60667e
PH
211978. Error message wording change in sieve.c.
2120
bb6e88ff
PH
212179. If smtp_accept_max_per_host was set, the number of connections could be
2122 restricted to fewer than expected, because the daemon was trying to set up
2123 a new connection before checking whether the processes handling previous
2124 connections had finished. The check for completed processes is now done
2125 earlier. On busy systems, this bug wouldn't be noticed because something
2126 else would have woken the daemon, and it would have reaped the completed
2127 process earlier.
2128
1e70f85b
PH
212980. If a message was submitted locally by a user whose login name contained one
2130 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2131 It caused a spool format error. I have fixed the spool reading code. A
2132 related problem was that the "from" clause in the Received: line became
2133 illegal because of the space(s). It is now covered by ${quote_local_part.
2134
213581. Included the latest eximstats from Steve (adds average sizes to HTML Top
2136 tables).
2137
4e01f9d6
PH
213882. Updated OS/Makefile-AIX as per message from Mike Meredith.
2139
1ee1cef2
PH
214083. Patch from Sieve maintainer to fix unterminated string problem in
2141 "vacation" handling.
2142
6e2b4ccc
PH
214384. Some minor changes to the Linux configuration files to help with other
2144 OS variants using glibc.
2145
8e669ac1
PH
214685. One more patch for Sieve to update vacation handling to latest spec.
2147
495ae4b0 2148
bbe902f0
PH
2149----------------------------------------------------
2150See the note above about the 4.44 and 4.50 releases.
2151----------------------------------------------------
2152
2153
2154Exim version 4.44
2155-----------------
2156
2157 1. Change 4.43/35 introduced a bug that caused file counts to be
2158 incorrectly computed when quota_filecount was set in an appendfile
2159 transport
2160
2161 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2162 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2163 place.
2164
2165 3. Give more explanation in the error message when the command for a transport
2166 filter fails to execute.
2167
2168 4. There are several places where Exim runs a non-Exim command in a
2169 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2170 was being done only for the command run by the queryprogram router. It is
2171 now done for all such subprocesses. The other cases are: ${run, transport
2172 filters, and the commands run by the lmtp and pipe transports.
2173
2174 5. Some older OS have a limit of 256 on the maximum number of file
2175 descriptors. Exim was using setrlimit() to set 1000 as a large value
2176 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2177 systems. I've change it so that if it can't get 1000, it tries for 256.
2178
2179 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2180 was an oversight, and furthermore, ever since the addition of extra
2181 controls (e.g. 4.43/32), the checks on when to allow different forms of
2182 "control" were broken. There should now be diagnostics for all cases when a
2183 control that does not make sense is encountered.
2184
2185 7. $recipients is now available in the predata ACL (oversight).
2186
2187 8. Tidy the search cache before the fork to do a delivery from a message
2188 received from the command line. Otherwise the child will trigger a lookup
2189 failure and thereby defer the delivery if it tries to use (for example) a
2190 cached ldap connection that the parent has called unbind on.
2191
2192 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2193 of $address_data from the recipient verification was clobbered by the
2194 sender verification.
2195
219610. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2197 was its contents. (It was OK if the option was not defined at all.)
2198
219911. A "Completed" log line is now written for messages that are removed from
2200 the spool by the -Mrm option.
2201
220212. $host_address is now set to the target address during the checking of
2203 ignore_target_hosts.
2204
220513. When checking ignore_target_hosts for an ipliteral router, no host name was
2206 being passed; this would have caused $sender_host_name to have been used if
2207 matching the list had actually called for a host name (not very likely,
2208 since this list is usually IP addresses). A host name is now passed as
2209 "[x.x.x.x]".
2210
221114. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2212 code that specifies a non-restarting handler (typically sigaction() in
2213 modern systems) in an attempt to fix a rare and obscure crash bug.
2214
221515. Narrowed the window for a race in the daemon that could cause it to ignore
2216 SIGCHLD signals. This is not a major problem, because they are used only to
2217 wake it up if nothing else does.
2218
221916. A malformed maildirsize file could cause Exim to calculate negative values
2220 for the mailbox size or file count. Odd effects could occur as a result.
2221 The maildirsize information is now recalculated if the size or filecount
2222 end up negative.
2223
222417. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2225 support for a long time. Removed HAVE_SYS_VFS_H.
2226
ea3a6f44 222718. Updated exipick to current release from John Jetmore.
bbe902f0
PH
2228
222919. Allow an empty sender to be matched against a lookup in an address list.
2230 Previously the only cases considered were a regular expression, or an
2231 empty pattern.
2232
223320. Exim went into a mad DNS lookup loop when doing a callout where the
2234 host was specified on the transport, if the DNS lookup yielded more than
2235 one IP address.
2236
ea3a6f44
NM
223721. The RFC2047 encoding function was originally intended for short strings
2238 such as real names; it was not keeping to the 75-character limit for
2239 encoded words that the RFC imposes. It now respects the limit, and
2240 generates multiple encoded words if necessary. To be on the safe side, I
2241 have increased the buffer size for the ${rfc2047: expansion operator from
2242 1024 to 2048 bytes.
bbe902f0 2243
ea3a6f44
NM
224422. Failure to deliver a bounce message always caused it to be frozen, even if
2245 there was an errors_to setting on the router. The errors_to setting is now
2246 respected.
bbe902f0
PH
2247
224823. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2249 canonical form (fully expanded) before being placed in
2250 $sender_host_address.
2251
225224. Updated eximstats to version 1.33
2253
ea3a6f44
NM
225425. Include certificate and key file names in error message when GnuTLS fails
2255 to set them up, because the GnuTLS error message doesn't include the name
2256 of the failing file when there is a problem reading it.
bbe902f0
PH
2257
225826. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 2259 As per change 25.
bbe902f0 2260
ea3a6f44
NM
226127. Reset the locale to "C" after calling embedded Perl, in case it was changed
2262 (this can affect the format of dates).
bbe902f0 2263
ea3a6f44
NM
226428. exim_tidydb, when checking for the continued existence of a message for
2265 which it has found a message-specific retry record, was not finding
2266 messages that were in split spool directories. Consequently, it was
2267 deleting retry records that should have stayed in existence.
bbe902f0
PH
2268
226929. eximstats updated to version 1.35
2270 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2271 1.35 - bugfix such that pie charts by volume are generated correctly
2272
ea3a6f44
NM
227330. The SPA authentication driver was not abandoning authentication and moving
2274 on to the next authenticator when an expansion was forced to fail,
2275 contradicting the general specification for all authenticators. Instead it
2276 was generating a temporary error. It now behaves as specified.
bbe902f0 2277
ea3a6f44
NM
227831. The default ordering of permitted cipher suites for GnuTLS was pessimal
2279 (the order specifies the preference for clients). The order is now AES256,
2280 AES128, 3DES, ARCFOUR128.
bbe902f0 2281
ea3a6f44
NM
228231. Small patch to Sieve code - explicitly set From: when generating an
2283 autoreply.
bbe902f0 2284
ea3a6f44
NM
228532. Exim crashed if a remote delivery caused a very long error message to be
2286 recorded - for instance if somebody sent an entire SpamAssassin report back
2287 as a large number of 550 error lines. This bug was coincidentally fixed by
2288 increasing the size of one of Exim's internal buffers (big_buffer) that
2289 happened as part of the Exiscan merge. However, to be on the safe side, I
2290 have made the code more robust (and fixed the comments that describe what
2291 is going on).
bbe902f0 2292
ea3a6f44
NM
229333. Some experimental protocols are using DNS PTR records for new purposes. The
2294 keys for these records are domain names, not reversed IP addresses. The
2295 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2296 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
2297 CAN-2005-0021
2298
ea3a6f44
NM
229934. The host_aton() function is supposed to be passed a string that is known
2300 to be a valid IP address. However, in the case of IPv6 addresses, it was
2301 not checking this. This is a hostage to fortune. Exim now panics and dies
2302 if the condition is not met. A case was found where this could be provoked
2303 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2304 components; fortuitously, this particular loophole had already been fixed
2305 by change 4.50/55 or 4.44/33 above.
2306
2307 If there are any other similar loopholes, the new check in host_aton()
2308 itself should stop them being exploited. The report I received stated that
2309 data on the command line could provoke the exploit when Exim was running as
2310 exim, but did not say which command line option was involved. All I could
2311 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2312 running as the user.
bbe902f0
PH
2313 CAN-2005-0021
2314
ea3a6f44
NM
231535. There was a buffer overflow vulnerability in the SPA authentication code
2316 (which came originally from the Samba project). I have added a test to the
2317 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
2318 CAN-2005-0022
2319
ea3a6f44
NM
232036. The daemon start-up calls getloadavg() while still root for those OS that
2321 need the first call to be done as root, but it missed one case: when
2322 deliver_queue_load_max is set with deliver_drop_privilege. This is
2323 necessary for the benefit of the queue runner, because there is no re-exec
2324 when deliver_drop_privilege is set.
bbe902f0 2325
ea3a6f44
NM
232637. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2327 was in use, was not putting the data itself into the right store pool;
2328 consequently, it could be overwritten for a subsequent message in the same
2329 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2330 the caching.)
bbe902f0 2331
ea3a6f44
NM
233238. Sometimes the final signoff response after QUIT could fail to get
2333 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2334 < 0 before doing a fflush(). This bug looks as though it goes back to the
2335 introduction of TLS in release 3.20, but "sometimes" must have been rare
2336 because the tests only now provoked it.
bbe902f0
PH
2337
2338
495ae4b0
PH
2339Exim version 4.43
2340-----------------
2341
2342 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2343 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2344 Now it returns an integer. A number of calls were still expecting a T/F
2345 return. Fortuitously, in all cases, the tests worked in OK situations,
2346 which is the norm. However, things would have gone wrong on any write
2347 failures on the smtp file descriptor. This function is used when sending
2348 messages over SMTP and also when doing verify callouts.
2349
2350 2. When Exim is called to do synchronous delivery of a locally submitted
2351 message (the -odf or -odi options), it no longer closes stderr before doing
2352 the delivery.
2353
2354 3. Implemented the mua_wrapper option.
2355
2356 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2357
2358 5. Implemented the functions header_remove(), header_testname(),
2359 header_add_at_position(), and receive_remove_recipient(), and exported them
2360 to local_scan().
2361
2362 6. If an ACL "warn" statement specified the addition of headers, Exim already
2363 inserted X-ACL-Warn: at the start if there was no header name. However, it
2364 was not making this test for the second and subsequent header lines if
2365 there were newlines in the string. This meant that an invalid header could
2366 be inserted if Exim was badly configured.
2367
2368 7. Allow an ACL "warn" statement to add header lines at the start or after all
2369 the Received: headers, as well as at the end.
2370
2371 8. Added the rcpt_4xx retry error code.
2372
2373 9. Added postmaster_mailfrom=xxx to callout verification option.
2374
237510. Added mailfrom=xxxx to the callout verification option, for verify=
2376 header_sender only.
2377
237811. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2379 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2380
238112. Inserted some casts to stop certain compilers warning when using pointer
2382 differences as field lengths or precisions in printf-type calls (mostly
2383 affecting debugging statements).
2384
238513. Added optional readline() support for -be (dynamically loaded).
2386
238714. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2388 same clock tick as a message's arrival, so that its received time was the
2389 same as the "first fail" time on the retry record, and that message
2390 remained on the queue past the ultimate address timeout, every queue runner
2391 would try a delivery (because it was past the ultimate address timeout) but
2392 after another failure, the ultimate address timeout, which should have then
2393 bounced the address, did not kick in. This was a "< instead of <=" error;
2394 in most cases the first failure would have been in the next clock tick
2395 after the received time, and all would be well.
2396
239715. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2398 being recognized when the domain list was tested by the match_domain
2399 condition in an expansion string.
2400
240116. Added the ${str2b64: operator.
2402
240317. Exim was always calling setrlimit() to set a large limit for the number of
2404 processes, without checking whether the existing limit was already
2405 adequate. (It did check for the limit on file descriptors.) Furthermore,
2406 errors from getrlimit() and setrlimit() were being ignored. Now they are
2407 logged to the main and panic logs, but Exim does carry on, to try to do its
2408 job under whatever limits there are.
2409
241018. Imported PCRE 5.0.
2411
241219. Trivial typo in log message " temporarily refused connection" (the leading
2413 space).
2414
241520. If the log selector return_path_on_delivery was set and an address was
2416 redirected to /dev/null, the delivery process crashed because it assumed
2417 that a return path would always be set for a "successful" delivery. In this
2418 case, the whole delivery is bypassed as an optimization, and therefore no
2419 return path is set.
2420
242121. Internal re-arrangement: the function for sending a challenge and reading
2422 a response while authentication was assuming a zero-terminated challenge
2423 string. It's now changed to take a pointer and a length, to allow for
2424 binary data in such strings.
2425
242622. Added the cyrus_sasl authenticator (code supplied by MBM).
2427
242823. Exim was not respecting finduser_retries when seeking the login of the
2429 uid under which it was called; it was always trying 10 times. (The default
2430 setting of finduser_retries is zero.) Also, it was sleeping after the final
2431 failure, which is pointless.
2432
243324. Implemented tls_on_connect_ports.
2434
243525. Implemented acl_smtp_predata.
2436
243726. If the domain in control=submission is set empty, Exim assumes that the
2438 authenticated id is a complete email address when it generates From: or
2439 Sender: header lines.
2440
244127. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2442 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2443 chown and chgrp in /bin and hostname in /usr/bin.
2444
244528. Exim was keeping the "process log" file open after each use, just as it
2446 does for the main log. This opens the possibility of it remaining open for
2447 long periods when the USR1 signal hits a daemon. Occasional processlog
2448 errors were reported, that could have been caused by this. Anyway, it seems
2449 much more sensible not to leave this file open at all, so that is what now
2450 happens.
2451
245229. The long-running daemon process does not normally write to the log once it
2453 has entered its main loop, and it closes the log before doing so. This is
2454 so that log files can straightforwardly be renamed and moved. However,
2455 there are a couple of unusual error situations where the daemon does write
2456 log entries, and I had neglected to close the log afterwards.
2457
245830. The text of an SMTP error response that was received during a remote
2459 delivery was being truncated at 512 bytes. This is too short for some of
2460 the long messages that one sometimes sees. I've increased the limit to
2461 1024.
2462
246331. It is now possible to make retry rules that apply only when a message has a
2464 specific sender, in particular, an empty sender.
2465
246632. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2467 it possible to be selective about when SMTP synchronization is enforced.
2468
246933. Added "control = caseful_local_part" and "control = "caselower_local_part".
2470
247132. Implemented hosts_connection_nolog.
2472
247333. Added an ACL for QUIT.
2474
247534. Setting "delay_warning=" to disable warnings was not working; it gave a
2476 syntax error.
2477
247835. Added mailbox_size and mailbox_filecount to appendfile.
2479
248036. Added control = no_multiline_responses to ACLs.
2481
248237. There was a bug in the logic of the code that waits for the clock to tick
2483 in the case where the clock went backwards by a substantial amount such
2484 that the microsecond fraction of "now" was more than the microsecond
2485 fraction of "then" (but the whole seconds number was less).
2486
248738. Added support for the libradius Radius client library this is found on
2488 FreeBSD (previously only the radiusclient library was supported).
2489
2490
2491Exim version 4.42
2492-----------------
2493
2494 1. When certain lookups returned multiple values in the form name=value, the
2495 quoting of the values was not always being done properly. Specifically:
2496 (a) If the value started with a double quote, but contained no whitespace,
2497 it was not quoted.
2498 (b) If the value contained whitespace other than a space character (i.e.
2499 tabs or newlines or carriage returns) it was not quoted.
2500 This fix has been applied to the mysql and pgsql lookups by writing a
2501 separate quoting function and calling it from the lookup code. The fix
2502 should probably also be applied to nisplus, ibase and oracle lookups, but
2503 since I cannot test any of those, I have not disturbed their existing code.
2504
2505 2. A hit in the callout cache for a specific address caused a log line with no
2506 reason for rejecting RCPT. Now it says "Previous (cached) callout
2507 verification failure".
2508
2509 3. There was an off-by-one bug in the queryprogram router. An over-long
2510 return line was truncated at 256 instead of 255 characters, thereby
2511 overflowing its buffer with the terminating zero. As well as fixing this, I
2512 have increased the buffer size to 1024 (and made a note to document this).
2513
2514 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2515 when Exim is waiting for an SMTP response from a remote server, Exim
2516 restarts its select() call on the socket, thereby resetting its timeout.
2517 This is not a problem when such interrupts are rare. Somebody set up a cron
2518 job to run exiwhat every 2 minutes, which is less than the normal select()
2519 timeout (5 or 10 minutes). This meant that the select() timeout never
2520 kicked in because it was always reset. I have fixed this by comparing the
2521 time when an interrupt arrives with the time at the start of the first call
2522 to select(). If more time than the timeout has elapsed, the interrupt is
2523 treated as a timeout.
2524
2525 5. Some internal re-factoring in preparation for the addition of Sieve
2526 extensions (by MH). In particular, the "personal" test is moved to a
2527 separate function, and given an option for scanning Cc: and Bcc: (which is
2528 not set for Exim filters).
2529
2530 6. When Exim created an email address using the login of the caller as the
2531 local part (e.g. when creating a From: or Sender: header line), it was not
2532 quoting the local part when it contained special characters such as @.
2533
2534 7. Installed new OpenBSD configuration files.
2535
2536 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2537 try to make them clearer.
2538
2539 9. Callout options, other than the timeout value, were being ignored when
2540 verifying sender addresses in header lines. For example, when using
2541
2542 verify = header_sender/callout=no_cache
2543
2544 the cache was (incorrectly) being used.
2545
254610. Added a missing instance of ${EXE} to the exim_install script; this affects
2547 only the Cygwin environment.
2548
254911. When return_path_on_delivery was set as a log selector, if different remote
2550 addresses in the same message used different return paths and parallel
2551 remote delivery occurred, the wrong values would sometimes be logged.
2552 (Whenever a remote delivery process finished, the return path value from
2553 the most recently started remote delivery process was logged.)
2554
255512. RFC 3848 specifies standard names for the "with" phrase in Received: header
2556 lines when AUTH and/or TLS are in use. This is the "received protocol"
2557 field. Exim used to use "asmtp" for authenticated SMTP, without any
2558 indication (in the protocol name) for TLS use. Now it follows the RFC and
2559 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2560 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2561 names appear in log lines as well as in Received: header lines.
2562
256313. Installed MH's patches for Sieve to add the "copy" and "vacation"
2564 extensions, and comparison tests, and to fix some bugs.
2565
256614. Changes to the "personal" filter test:
2567
2568 (1) The test was buggy in that it was just doing the equivalent of
2569 "contains" tests on header lines. For example, if a user's address was
2570 anne@some.where, the "personal" test would incorrectly be true for
2571
2572 To: susanne@some.where
2573
2574 This test is now done by extracting each address from the header in turn,
2575 and checking the entire address. Other tests that are part of "personal"
2576 are now done using regular expressions (for example, to check local parts
2577 of addresses in From: header lines).
2578
2579 (2) The list of non-personal local parts in From: addresses has been
2580 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2581 taken from the Sieve specification recommendations.
2582
2583 (3) If the message contains any header line starting with "List-" it is
2584 treated as non-personal.
2585
2586 (4) The test for "circular" in the Subject: header line has been removed
2587 because it now seems ill-conceived.
2588
258915. Minor typos in src/EDITME comments corrected.
2590
259116. Installed latest exipick from John Jetmore.
2592
259317. If headers_add on a router specified a text string that was too long for
2594 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2595 of string_sprintf() is now avoided.
2596
259718. $message_body_size was not set (it was always zero) when running the DATA
2598 ACL and the local_scan() function.
2599
260019. For the "mail" command in an Exim filter, no default was being set for
2601 the once_repeat time, causing a random time value to be used if "once" was
2602 specified. (If the value happened to be <= 0, no repeat happened.) The
2603 default is now 0s, meaning "never repeat". The "vacation" command was OK
2604 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2605 (I found it when inspecting the code).
2606
260720. There is now an overall timeout for performing a callout verification. It
2608 defaults to 4 times the callout timeout, which applies to individual SMTP
2609 commands during the callout. The overall timeout applies when there is more
2610 than one host that can be tried. The timeout is checked before trying the
2611 next host. This prevents very long delays if there are a large number of
2612 hosts and all are timing out (e.g. when the network connections are timing
2613 out). The value of the overall timeout can be changed by specifying an
2614 additional sub-option for "callout", called "maxwait". For example:
2615
2616 verify = sender/callout=5s,maxwait=20s
2617
261821. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2619 to the end before writing, but this should make it even safer).
2620
262122. Exim was forgetting that it had advertised PIPELINING for the second and
2622 subsequent messages on an SMTP connection. It was also not resetting its
2623 memory on STARTTLS and an internal HELO.
2624
262523. When Exim logs an SMTP synchronization error within a session, it now
2626 records whether PIPELINING has been advertised or not.
2627
262824. Added 3 instances of "(long int)" casts to time_t variables that were being
2629 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2630 rather than long int.
2631
263225. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2633
263426. Added the never_mail option to autoreply.
2635
2636
2637Exim version 4.41
2638-----------------
2639
2640 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2641 crash if the getsockname() call failed; this can happen if a connection is
2642 closed very soon after it is established. The problem was simply in the
2643 order in which certain operations were done, causing Exim to try to write
2644 to the SMTP stream before it had set up the file descriptor. The bug has
2645 been fixed by making things happen in the correct order.
2646
2647
2648Exim version 4.40
2649-----------------
2650
2651 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2652 before the connection was closed, thus losing the rejection response.
2653
2654 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2655 some early Solaris releases, but causes trouble in current releases where
2656 socklen_t is defined.
2657
2658 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2659 always exist.
2660
2661 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2662 configured.
2663
2664 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2665 that releasing the top of it at the end releases what was used for sub-
2666 expansions (unless the block got too big). However, discard this block if
2667 the first thing is a variable or header, so that we can use its block when
2668 it is dynamic (useful for very large $message_headers, for example).
2669
2670 6. Lookups now cache *every* query, not just the most recent. A new, separate
2671 store pool is used for this. It can be recovered when all lookup caches are
2672 flushed. Lookups now release memory at the end of their result strings.
2673 This has involved some general refactoring of the lookup sources.
2674
2675 7. Some code has been added to the store_xxx() functions to reduce the amount
2676 of flapping under certain conditions.
2677
2678 8. log_incoming_interface used to affect only the <= reception log lines. Now
2679 it causes the local interface and port to be added to several more SMTP log
2680 lines, for example "SMTP connection from", and rejection lines.
2681
2682 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2683
268410. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2685
268611. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2687 could be overwritten at the end of the current message (or the start of a
2688 new message if it was set in a HELO ACL). The value is now preserved for
2689 the duration of the SMTP connection.
2690
269112. If a transport had a headers_rewrite setting, and a matching header line
2692 contained an unqualified address, that address was qualified, even if it
2693 did not match any rewriting rules. The underlying bug was that the values
2694 of the flags that permit the existence of unqualified sender and recipient
2695 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2696 non-local messages, and by -bnq for local messages) were not being
2697 preserved with the message after it was received.
2698
269913. When Exim was logging an SMTP synchronization error, it could sometimes log
2700 "next input=" as part of the text comprising the host identity instead of
2701 the correct text. The code was using the same buffer for two different
2702 strings. However, depending on which order the printing function evaluated
2703 its arguments, the bug did not always show up. Under Linux, for example, my
2704 test suite worked just fine.
2705
270614. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2707 doesn't work with some older versions of Perl. It has been changed to "my",
2708 which in any case is probably the better facility to use.
2709
271015. A really picky compiler found some instances of statements for creating
2711 error messages that either had too many or two few arguments for the format
2712 string.
2713
271416. The size of the buffer for calls to the DNS resolver has been increased
2715 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2716 for addresses that have a lot of PTR records. This alleviates a problem; it
2717 does not fully solve it.
2718
271917. A dnsdb lookup for PTR records that receives more data than will fit in the
2720 buffer now truncates the list and logs the incident, which is the same
2721 action as happens when Exim is looking up a host name and its aliases.
2722 Previously in this situation something unpredictable would happen;
2723 sometimes it was "internal error: store_reset failed".
2724
272518. If a server dropped the connection unexpectedly when an Exim client was
2726 using GnuTLS and trying to read a response, the client delivery process
2727 crashed while trying to generate an error log message.
2728
272919. If a "warn" verb in an ACL added multiple headers to a message in a single
2730 string, for example:
2731
2732 warn message = H1: something\nH2: something
2733
2734 the text was added as a single header line from Exim's point of view
2735 though it ended up OK in the delivered message. However, searching for the
2736 second and subsequent header lines using $h_h2: did not work. This has been
2737 fixed. Similarly, if a system filter added multiple headers in this way,
2738 the routers could not see them.
2739
274020. Expanded the error message when iplsearch is called with an invalid key to
2741 suggest using net-iplsearch in a host list.
2742
274321. When running tests using -bh, any delays imposed by "delay" modifiers in
2744 ACLs are no longer actually imposed (and a message to that effect is
2745 output).
2746
274722. If a "gecos" field in a passwd entry contained escaped characters, in
2748 particular, if it contained a \" sequence, Exim got it wrong when building
2749 a From: or a Sender: header from that name. A second bug also caused
2750 incorrect handling when an unquoted " was present following a character
2751 that needed quoting.
2752
275323. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2754 was not being matched caselessly.
2755
275624. Arranged for all hyphens in the exim.8 source to be escaped with
2757 backslashes.
2758
275925. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2760 properly. Recipient callout cache records were still being keyed to include
2761 the sender, even when use_sender was set false. This led to far more
2762 callouts that were necessary. The sender is no longer included in the key
2763 when use_sender is false.
2764
276526. Added "control = submission" modifier to ACLs.
2766
276727. Added the ${base62d: operator to decode base 62 numbers.
2768
276928. dnsdb lookups can now access SRV records.
2770
277129. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2772 the configuration file.
2773
277430. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2775 (-v) mode. This makes the output for a verbose queue run more intelligible.
2776
277731. Added a use_postmaster feature to recipient callouts.
2778
277932. Added the $body_zerocount variable, containing the number of binary zero
2780 bytes in the message body.
2781
278233. The time of last modification of the "new" subdirectory is now used as the
2783 "mailbox time last read" when there is a quota error for a maildir
2784 delivery.
2785
278634. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2787
278835. Added +ignore_unknown as a special item in host lists.
2789
279036. Code for decoding IPv6 addresses in host lists is now included, even if
2791 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2792 address was recognized as an IP address, but was then not correctly decoded
2793 into binary, causing unexpected and incorrect effects when compared with
2794 another IP address.
2795
2796
2797Exim version 4.34
2798-----------------
2799
2800 1. Very minor rewording of debugging text in manualroute to say "list of
2801 hosts" instead of "hostlist".
2802
2803 2. If verify=header_syntax was set, and a header line with an unqualified
2804 address (no domain) and a large number of spaces between the end of the
2805 name and the colon was received, the reception process suffered a buffer
2806 overflow, and (when I tested it) crashed. This was caused by some obsolete
2807 code that should have been removed. The fix is to remove it!
2808
2809 3. When running in the test harness, delay a bit after writing a bounce
2810 message to get a bit more predictability in the log output.
2811
2812 4. Added a call to search_tidyup() just before forking a reception process. In
2813 theory, someone could use a lookup in the expansion of smtp_accept_max_
2814 per_host which, without the tidyup, could leave open a database connection.
2815
2816 5. Added the variables $recipient_data and $sender_data which get set from a
2817 lookup success in an ACL "recipients" or "senders" condition, or a router
2818 "senders" option, similar to $domain_data and $local_part_data.
2819
2820 6. Moved the writing of debug_print from before to after the "senders" test
2821 for routers.
2822
2823 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2824 problems for message scanning, either using a data ACL, or using
2825 local_scan() because the Received: header was not generated till after they
2826 were called (in order to set the time as the time of reception completion).
2827 I have revised the way this works. The header is now generated after the
2828 body is received, but before the ACL or local_scan() are called. After they
2829 are run, the timestamp in the header is updated.
2830
2831
2832Exim version 4.33
2833-----------------
2834
2835 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2836 before starting a queue runner without re-exec. This happened only when
2837 deliver_drop_privilege was set or when the Exim user was set to root. The
2838 effect of the bug was that timeouts during subsequent deliveries caused
2839 crashes instead of being properly handled. The handler is now left at its
2840 default (and expected) setting.
2841
2842 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2843 message, again when deliver_drop_privilege is set or Exim is run as root.
2844 The bug described in (1) was not present in this case, but the tidying up
2845 of the other signals was missing. I have made the two cases consistent.
2846
2847 3. The ignore_target_hosts setting on a manualroute router was being ignored
2848 for hosts that were looked up using the /MX notation.
2849
2850 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2851 in domain lists.
2852
2853 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2854 operated on the sender address. After changing the $sender_address to <>
2855 for the sender address verify, Exim was re-instated it as the original
2856 (before rewriting) address, but remembering that it had rewritten it, so it
2857 wasn't rewriting it again. This bug also had the effect of breaking the
2858 sender address verification caching when the sender address was rewritten.
2859
2860 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2861 This has been changed so that if the ip literal address matches
2862 ignore_target_hosts, the router declines.
2863
2864 7. Added expansion conditions match_domain, match_address, and match_local_
2865 part (NOT match_host).
2866
2867 8. The placeholder for the Received: header didn't have a length field set.
2868
2869 9. Added code to Exim itself and to exim_lock to test for a specific race
2870 condition that could lead to file corruption when using MBX delivery. The
2871 issue is with the lockfile that is created in /tmp. If this file is removed
2872 after a process has opened it but before that process has acquired a lock,
2873 there is the potential for a second process to recreate the file and also
2874 acquire a lock. This could lead to two Exim processes writing to the file
2875 at the same time. The added code performs the same test as UW imapd; it
2876 checks after acquiring the lock that its file descriptor still refers to
2877 the same named file.
2878
287910. The buffer for building added header lines was of fixed size, 8192 bytes.
2880 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2881 when Exim is built.
2882
288311. Added the smtp_active_hostname option. If used, this will typically be made
2884 to depend on the incoming interface address. Because $interface_address is
2885 not set up until the daemon has forked a reception process, error responses
2886 that can happen earlier (such as "too many connections") no longer contain
2887 a host name.
2888
288912. If an expansion in a condition on a "warn" statement fails because a lookup
2890 defers, the "warn" statement is abandoned, and the next ACL statement is
2891 processed. Previously this caused the whole ACL to be aborted.
2892
289313. Added the iplsearch lookup type.
2894
289514. Added ident_timeout as a log selector.
2896
289715. Added tls_certificate_verified as a log selector.
2898
289916. Added a global option tls_require_ciphers (compare the smtp transport
2900 option of the same name). This controls incoming TLS connections.
2901
290217. I finally figured out how to make tls_require_ciphers do a similar thing
2903 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2904 before starting the TLS session.
2905
290618. Tabs are now shown as \t in -bP output.
2907
290819. If the log selector return_path_on_delivery was set, Exim crashed when
2909 bouncing a message because it had too many Received: header lines.
2910
291120. If two routers both had headers_remove settings, and the first one included
2912 a superfluous trailing colon, the final name in the first list and the
2913 first name in the second list were incorrectly joined into one item (with a
2914 colon in the middle).
2915
2916
2917Exim version 4.32
2918-----------------
2919
2920 1. Added -C and -D options to the exinext utility, mainly to make it easier
2921 to include in the automated testing, but these could be helpful when
2922 multiple configurations are in use.
2923
2924 2. The exinext utility was not formatting the output nicely when there was
2925 an alternate port involved in the retry record key, nor when there was a
2926 message id as well (for retries that were specific to a specific message
2927 and a specific host). It was also confused by IPv6 addresses, because of
2928 the additional colons they contain. I have fixed the IPv4 problem, and
2929 patched it up to do a reasonable job for IPv6.
2930
2931 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2932 delivery, the log line now contains "pipelined" if PIPELINING was used.
2933
2934 4. An SMTP transport process used to panic and die if the bind() call to set
2935 an explicit outgoing interface failed. This has been changed; it is now
2936 treated in the same way as a connect() failure.
2937
2938 5. A reference to $sender_host_name in the part of a conditional expansion
2939 that was being skipped was still causing a DNS lookup. This no longer
2940 occurs.
2941
2942 6. The def: expansion condition was not recognizing references to header lines
2943 that used bh_ and bheader_.
2944
2945 7. Added the _cache feature to named lists.
2946
2947 8. The code for checking quota_filecount in the appendfile transport was
2948 allowing one more file than it should have been.
2949
2950 9. For compatibility with Sendmail, the command line option
2951
2952 -prval:sval
2953
2954 is equivalent to
2955
2956 -oMr rval -oMs sval
2957
2958 and sets the incoming protocol and host name (for trusted callers). The
2959 host name and its colon can be omitted when only the protocol is to be set.
2960 Note the Exim already has two private options, -pd and -ps, that refer to
2961 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2962 "s", but I don't think that's a major issue.
2963
296410. A number of refactoring changes to the code, none of which should affect
2965 Exim's behaviour:
2966
2967 (a) The number of logging options was getting close to filling up the
2968 32-bit word that was used as a bit map. I have split them into two classes:
2969 those that are passed in the argument to log_write(), and those that are
2970 only ever tested independently outside of that function. These are now in
2971 separate 32-bit words, so there is plenty of room for expansion again.
2972 There is no change in the user interface or the logging behaviour.
2973
2974 (b) When building, for example, log lines, the code previously used a
2975 macro that called string_cat() twice, in order to add two strings. This is
2976 not really sufficiently general. Furthermore, there was one instance where
2977 it was actually wrong because one of the argument was used twice, and in
2978 one call a function was used. (As it happened, calling the function twice
2979 did not affect the overall behaviour.) The macro has been replaced by a
2980 function that can join an arbitrary number of extra strings onto a growing
2981 string.
2982
2983 (c) The code for expansion conditions now uses a table and a binary chop
2984 instead of a serial search (which was left over from when there were very
2985 few conditions). Also, it now recognizes conditions like "pam" even when
2986 the relevant support is not compiled in: a suitably worded error message is
2987 given if an attempt is made to use such a condition.
2988
298911. Added ${time_interval:xxxxx}.
2990
299112. A bug was causing one of the ddress fields not to be passed back correctly
2992 from remote delivery subprocesses. The field in question was not being
2993 subsequently used, so this caused to problems in practice.
2994
299513. Added new log selectors queue_time and deliver_time.
2996
299714. Might have fixed a bug in maildirsizefile handling that threw up
2998 "unexpected character" debug warnings, and recalculated the data
2999 unnecessarily. In any case, I expanded the warning message to give more
3000 information.
3001
300215. Added the message "Restricted characters in address" to the statements in
3003 the default ACL that block characters like @ and % in local parts.
3004
300516. Change 71 for release 4.31 proved to be much less benign that I imagined.
3006 Three changes have been made:
3007
3008 (a) There was a serious bug; a negative response to MAIL caused the whole
3009 recipient domain to be cached as invalid, thereby blocking all messages
3010 to all local parts at the same domain, from all senders. This bug has
3011 been fixed. The domain is no longer cached after a negative response to
3012 MAIL if the sender used is not empty.
3013
3014 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3015 been restored.
3016
3017 (c) A new callout option, "use_sender" has been added for people who want
3018 the modified behaviour.
3019
3020
3021Exim version 4.31
3022-----------------
3023
3024 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3025 Larry Rosenman.
3026
3027 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3028 indeed breaks things for older releases.
3029
3030 3. Added additional logging to the case where there is a problem reading data
3031 from a filter that is running in a subprocess using a pipe, in order to
3032 try to track down a specific problem.
3033
3034 4. Testing facility fudge: when running in the test harness and attempting
3035 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3036 getting "No route to host". Convert this to a timeout.
3037
3038 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3039 warning.
3040
3041 6. Some OS don't have socklen_t but use size_t instead. This affects the
3042 fifth argument of getsockopt() amongst other things. This is now
3043 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3044 can be set for individual OS. I have set it for SunOS5, OSF1, and
3045 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3046 some earlier ones do not.
3047
3048 7. Change 4.30/15 was not doing the test caselessly.
3049
3050 8. The standard form for an IPv6 address literal was being rejected by address
3051 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3052 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3053 this, as well as the form without the "IPv6" on the front (but only when
3054 address literals are enabled, of course).
3055
3056 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3057
305810. Exim crashed if a message with an empty sender address specified by -f
3059 encountered a router with an errors_to setting. This could be provoked only
3060 by a command such as
3061
3062 exim -f "" ...
3063
3064 where an empty string was supplied; "<>" did not hit this bug.
3065
306611. Installed PCRE release 4.5.
3067
306812. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3069 remained set. It is now erased.
3070
307113. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3072 times from message ids (which are base 36 rather than the normal 62).
3073
307414. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3075 were being counted as actual protocol errors, and logged if the log
3076 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3077 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3078 and DATA following a set of rejected RCPTs do not count as protocol errors.
3079 In other words, Exim assumes they were pipelined, though this may not
3080 actually be the case. Of course, in all cases the client gets an
3081 appropriate error code.
3082
308315. If a lookup fails in an ACL condition, a message about the failure may
3084 be available; it is used if testing the ACL cannot continue, because most
3085 such messages specify what the cause of the deferral is. However, some
3086 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3087 that caused an old message to be retained and used if a later statement
3088 caused a defer, replacing the real cause of the deferral.
3089
309016. If an IP address had so many PTR records that the DNS lookup buffer
3091 was not large enough to hold them, Exim could crash while trying to process
3092 the truncated data. It now detects and logs this case.
3093
309417. Further to 4.21/58, another change has been made: if (and only if) the
3095 first line of a message (the first header line) ends with CRLF, a bare LF
3096 in a subsequent header line has a space inserted after it, so as not to
3097 terminate the header.
3098
309918. Refactoring: tidied an ugly bit of code in appendfile that copied data
3100 unnecessarily, used atoi() instead of strtol(), and didn't check the
3101 termination when getting file sizes from file names by regex.
3102
310319. Completely re-implemented the support for maildirsize files, in the light
3104 of a number of problems with the previous contributed implementation
3105 (4.30/29). In particular:
3106
3107 . If the quota is zero, the maildirsize file is maintained, but no quota is
3108 imposed.
3109
3110 . If the maildir directory does not exist, it is created before any attempt
3111 to write a maildirsize file.
3112
3113 . The quota value in the file is just a cache; if the quota is changed in
3114 the transport, the new value overrides.
3115
3116 . A regular expression is available for excluding directories from the
3117 count.
3118
311920. The autoreply transport checks the characters in options that define the
3120 message's headers; it allows continued headers, but it was checking with
3121 isspace() after an embedded newline instead of explicitly looking for a
3122 space or a tab.
3123
312421. If all the "regular" hosts to which an address was routed had passed their
3125 expiry times, and had not reached their retry times, the address was
3126 bounced, even if fallback hosts were defined. Now Exim should go on to try
3127 the fallback hosts.
3128
312922. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3130 equivalent code in the SMTP transport. Some hosts send humungous responses
3131 to HELO/EHLO, more than 1024 it seems.
3132
313323. Refactoring: code in filter.c used (void *) for "any old type" but this
3134 gives compiler warnings in some environments. I've now done it "properly",
3135 using a union.
3136
313724. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3138 (because of problems with the built-in one) was declared to return uschar *
3139 instead of char *, causing compiler failure.
3140
314125. Fixed a file descriptor leak when processing alias/forward files.
3142
314326. Fixed a minor format string issue in dbfn.c.
3144
314527. Typo in exim.c: ("dmbnz" for "dbmnz").
3146
314728. If a filter file refered to $h_xxx or $message_headers, and the headers
3148 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3149 become corrupted.
3150
315129. When a sender address is verified, it is cached, to save repeating the test
3152 when there is more than one recipient in a message. However, when the
3153 verification involves a callout, it is possible for different callout
3154 options to be set for different recipients. It is too complicated to keep
3155 track of this in the cache, so now Exim always runs a verification when a
3156 callout is required, relying on the callout cache for the optimization.
3157 The overhead is duplication of the address routing, but this should not be
3158 too great.
3159
316030. Fixed a bug in callout caching. If a RCPT command caused the sender address
3161 to be verified with callout=postmaster, and the main callout worked but the
3162 postmaster check failed, the verification correctly failed. However, if a
3163 subsequent RCPT command asked for sender verification *without* the
3164 postmaster check, incorrect caching caused this verification also to fail,
3165 incorrectly.
3166
316731. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3168 it was not caching the DNS options (qualify_single, search_parents) that
3169 were used when the lookup failed. A subsequent lookup with different
3170 options therefore always gave the same answer, though there were cases
3171 where it should not have. (Example: a "domains = !$mx_any" option on a
3172 dnslookup router: the "domains" option is always processed without any
3173 widening, but the router might have qualify_single set.) Now Exim uses the
3174 cached value only when the same options are set.
3175
317632. Added John Jetmore's "exipick" utility to the distribution.
3177
317833. GnuTLS: When an attempt to start a TLS session fails for any reason other
3179 than a timeout (e.g. a certificate is required, and is not provided), an
3180 Exim server now closes the connection immediately. Previously it waited for
3181 the client to close - but if the client is SSL, it seems that they each
3182 wait for each other, leading to a delay before one of them times out.
3183
318434: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3185 maintained 0.8.x compatibility because I don't think many are using it, and
3186 it is clearly obsolete.
3187
318835. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3189 transport.
3190
319136. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3192 client certificate was expired. A simple patch fixes this, though I don't
3193 understand the full logic of why the verify callback is called multiple
3194 times.
3195
319637. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3197 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3198 which causes problems with some clients (such as the Certicom SSL Plus
3199 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3200 disables the coutermeasure allowing Eudora to connect."
3201
320238. Exim was not checking that a write() to a log file succeeded. This could
3203 lead to Bad Things if a log got too big, in particular if it hit a file
3204 size limit. Exim now panics and dies if it cannot write to a log file, just
3205 as it does if it cannot open a log file.
3206
320739. Modified OS/Makefile-Linux so that it now contains
3208
3209 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3210
3211 The two -D definitions ensure that Exim is compiled with large file
3212 support, which makes it possible to handle log files that are bigger than
3213 2^31.
3214
321540. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3216 instance) a domain was checked against a named list that involved a lookup,
3217 causing $domain_data to be set, then another domain was checked against the
3218 same list, then the first domain was re-checked, the value of $domain_data
3219 after the final check could be wrong. In particular, if the second check
3220 failed, it could be set empty. This bug probably also applied to
3221 $localpart_data.
3222
322341. The strip_trailing_dot option was not being applied to the address given
3224 with the -f command-line option.
3225
322642. The code for reading a message's header from the spool was incrementing
3227 $received_count, but never initializing it. This meant that the value was
3228 incorrect (doubled) while delivering a message in the same process in which
3229 it was received. In the most common configuration of Exim, this never
3230 happens - a fresh exec is done - but it can happen when
3231 deliver_drop_privilege is set.
3232
323343. When Exim logs an SMTP synchronization error - client data sent too soon -
3234 it now includes up to 150 characters of the unexpected data in the log
3235 line.
3236
323744. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3238 and building data strings. The size of both of these buffers was 10 000
3239 bytes - far larger than anybody would *ever* want, thought I. Needless to
3240 say, somebody hit the limit. I have increased the maximum line length to
3241 20 000 and the maximum data length of concatenated lines to 100 000. I have
3242 also fixed two bugs, because there was no checking on these buffers. Tsk,
3243 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3244 buffer is too small.
3245
324645. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3247 lsearch lookups. Now it does.
3248
324946. When parsing a route_list item in a manualroute router, a fixed-length
3250 buffer was used for the list of hosts. I made this 1024 bytes long,
3251 thinking that nobody would ever have a list of hosts that long. Wrong.
3252 Somebody had a whole pile of complicated expansion conditions, and the
3253 string was silently truncated, leading to an expansion error. It turns out
3254 that it is easier to change to an unlimited length (owing to other changes
3255 that have happened since this code was originally written) than to build
3256 structure for giving a limitation error. The length of the item that
3257 expands into the list of hosts is now unlimited.
3258
325947. The lsearch lookup could not handle data where the length of text line was
3260 more than 4095 characters. Such lines were truncated, leading to shortened
3261 data being returned. It should now handle lines of any length.
3262
326348. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3264 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3265 ACL").
3266
326749. Cosmetic tidy to scripts like exicyclog that are generated by globally
3268 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3269 no longer happens in comment lines. A list of replacements is now placed
3270 at the head of all of the source files, except those whose only change is
3271 to replace PERL_COMMAND in the very first #! line.
3272
327350. Replaced the slow insertion sort in queue.c, for sorting the list of
3274 messages on the queue, with a bottom-up merge sort, using code contributed
3275 by Michael Haardt. This should make operations like -bp somewhat faster on
3276 large queues. It won't affect queue runners, except when queue_run_in_order
3277 is set.
3278
327951. Installed eximstats 1.31 in the distribution.
3280
328152. Added support for SRV lookups to the dnslookup router.
3282
328353. If an ACL referred to $message_body or $message_body_end, the value was not
3284 reset for any messages that followed in the same SMTP session.
3285
328654. The store-handling optimization for building very long strings was not
3287 differentiating between the different store pools. I don't think this
3288 actually made any difference in practice, but I've tidied it.
3289
329055. While running the routers to verify a sender address, $sender_address
3291 was still set to the sender address. This is wrong, because when routing to
3292 send a bounce to the sender, it would be empty. Therefore, I have changed
3293 it so that, while verifying a sender address, $sender_address is set to <>.
3294 (There is no change to what happens when verifying a recipient address.)
3295
329656. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3297 target A or AAAA records (if not already returned) without resetting the
3298 qualify_single or search_parents options of the DNS resolver. These are
3299 inappropriate in this case because the targets of MX and SRV records must
3300 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3301 target that, when qualified, matched something in the local domain. These
3302 two options are now turned off when doing these lookups.
3303
330457. It seems that at least some releases of Reiserfs (which does not have the
3305 concept of a fixed number of inodes) returns zero and not -1 for the
3306 number of available inodes. This interacted badly with check_spool_inodes,
3307 which assumed that -1 was the "no such thing" setting. What I have done is
3308 to check that the total number of inodes is greater than zero before doing
3309 the test of how many are available.
3310
331158. When a "warn" ACL statement has a log_message modifier, the message is
3312 remembered, and not repeated. This is to avoid a lot of repetition when a
3313 message has many recipients that cause the same warning to be written.
3314 Howewer, Exim was preserving the list of already written lines for an
3315 entire SMTP session, which doesn't seem right. The memory is now reset if a
3316 new message is started.
3317
331859. The "rewrite" debugging flag was not showing the result of rewriting in the
3319 debugging output unless log_rewrite was also set.
3320
332160. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3322 of (int)(handle) when we know that handle contains (void *)(-1).
3323
332461. The Exim daemon panic-logs an error return when it closes the incoming
3325 connection. However "connection reset by peer" seems to be common, and
3326 isn't really an error worthy of noting specially, so that particular error
3327 is no long logged.
3328
332962. When Exim is trying to find all the local interfaces, it used to panic and
3330 die if the ioctl to get the interface flags failed. However, it seems that
3331 on at least one OS (Solaris 9) it is possible to have an interface that is
3332 included in the list of interfaces, but for which you get a failure error
3333 for this call. This happens when the interface is not "plumbed" into a
3334 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3335 failure of the "get flags" call assumes that the interface is down.
3336
333763. Added a ${eval10: operator, which assumes all numbers are decimal. This
3338 makes life easier for people who are doing arithmetic on fields extracted
3339 from dates, where you often get leading zeros that should not be
3340 interpreted as octal.
3341
334264. Added qualify_domain to the redirect router, to override the global
3343 setting.
3344
334565. If a pathologically long header line contained very many addresses (the
3346 report of this problem mentioned 10 000) and each of them was rewritten,
3347 Exim could use up a very large amount of memory. (It kept on making new
3348 copies of the header line as it rewrote, and never released the old ones.)
3349 At the expense of a bit more processing, the header rewriting function has
3350 been changed so that it no longer eats memory in this way.
3351
335266. The generation of the Received: header has been moved from the time that a
3353 message starts to be received, to the time that it finishes. The timestamp
3354 in the Received: header should now be very close to that of the <= log
3355 line. There are two side-effects of this change:
3356
3357 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3358 logged header lines no longer include the local Received: line, because
3359 it has not yet been created. The same applies to a copy of the message
3360 that is returned to a non-SMTP sender when a message is rejected.
3361
3362 (b) When a filter file is tested using -bf, no additional Received: header
3363 is added to the test message. After some thought, I decided that this
3364 is a bug fix.
3365
3366 This change does not affect the value of $received_for. It is still set
3367 after address rewriting, but before local_scan() is called.
3368
336967. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3370
337168. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3372 gave an unhelpful panic error message, and a defer error. I have managed to
3373 change this behaviour so that it now rejects any supplied certificate,
3374 which seems right, as the list of acceptable certificates is empty.
3375
337669. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3377 gave an unhelpful defer error. I have not managed to make this reject any
3378 supplied certificates, but the error message it gives is "no certificate
3379 supplied", which is not helpful.
3380
338170. exigrep's output now also includes lines that are not associated with any
3382 message, but which match the given pattern. Implemented by a patch from
3383 Martin Sluka, which also tidied up the Perl a bit.
3384
338571. Recipient callout verification, like sender verification, was using <> in
3386 the MAIL FROM command. This isn't really the right thing, since the actual
3387 sender may affect whether the remote host accepts the recipient or not. I
3388 have changed it to use the actual sender in the callout; this means that
3389 the cache record is now keyed on a recipient/sender pair, not just the
3390 recipient address. There doesn't seem to be a real danger of callout loops,
3391 since a callout by the remote host to check the sender would use <>.
3392 [SEE ABOVE: changed after hitting problems.]
3393
339472. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3395 temporary errors. However, in the case of such a code being given after
3396 the end of a data transmission (i.e. after ".") Exim was failing to write
3397 a retry record for the message. (Yes, there was some broken host that was
3398 actually sending 8xx at this point.)
3399
340073. An unknown lookup type in a host list could cause Exim to panic-die when
3401 the list was checked. (An example that provoked this was putting <; in the
3402 middle of a list instead of at the start.) If this happened during a DATA
3403 ACL check, a -D file could be left lying around. This kind of configuration
3404 error no longer causes Exim to die; instead it causes a defer errror. The
3405 incident is still logged to the main and panic logs.
3406
340774. Buglet left over from Exim 3 conversion. The message "too many messages
3408 in one connection" was written to the rejectlog but not the mainlog, except
3409 when address rewriting (yes!) was being logged.
3410
341175. Added write_rejectlog option.
3412
341376. When a system filter was run not as root (that is, when system_filter_user
3414 was set), the values of the $n variables were not being returned to the
3415 main process; thus, they were not subsequently available in the $sn
3416 variables.
3417
341877. Added +return_path_on_delivery log selector.
3419
342078. A connection timeout was being treated differently from recipients deferred
3421 when testing hosts_max_try with a message that was older than the host's
3422 retry timeout. (The host should not be counted, thus allowing all hosts to
3423 be tried at least once before bouncing.) This may have been the cause of an
3424 occasionally reported bug whereby a message would remain on the queue
3425 longer than the retry timeout, but would be bounced if a delivery was
3426 forced. I say "may" because I never totally pinned down the problem;
3427 setting up timeout/retry tests is difficult. See also the next item.
3428
342979. The ultimate address timeout was not being applied to errors that involved
3430 a combination of host plus message (for example, a timeout on a MAIL
3431 command). When an address resolved to a number of possible hosts, and they
3432 were not all tried for each delivery (e.g. because of hosts_max_try), a
3433 message could remain on the queue longer than the retry timeout.
3434
343580. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3436 Haardt.
3437
343881. Fixed an obscure SMTP outgoing bug which required at least the following
3439 conditions: (a) there was another message waiting for the same server;
3440 (b) the server returned 5xx to all RCPT commands in the first message so
3441 that the message was not completed; (c) the server dropped the connection
3442 or gave a negative response to the RSET that Exim sends to abort the
3443 transaction. The observed case was a dropped connection after DATA that had
3444 been sent in pipelining mode. That is, the server had advertised PIPELINING
3445 but was not implementing it correctly. The effect of the bug was incorrect
3446 behaviour, such as trying another host, and this could lead to a crash.
3447
3448
3449Exim version 4.30
3450-----------------
3451
3452 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3453 and daemon.c were passed as pointers to ints; they should have been
3454 pointers to socklen_t variables (which are typically unsigned ints).
3455
3456 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3457 fixed.
3458
3459 3. Fixed a really odd bug that affected only the testing scheme; patching a
3460 certain fixed string in the binary changed the value of another string that
3461 happened to be identical to the end of the original first string.
3462
3463 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3464 name", it returns that address as the IP address. On some operating
3465 systems (e.g. Solaris), it also passes back the IP address string as the
3466 "host name". However, on others (e.g. Linux), it passes back an empty
3467 string. Exim wasn't checking for this, and was changing the host name to an
3468 empty string, assuming it had been canonicized.
3469
3470 5. Although rare, it is permitted to have more than one PTR record for a given
3471 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3472 all the names associated with an address, because they do in Solaris.
3473 However, it seems that they do not in Linux for data that comes from the
3474 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3475 I found this out when I moved to a new Linux workstation and tried to run
3476 the Exim test suite.
3477
3478 To get round this problem I have changed the code so that it now does its
3479 own call to the DNS to look up PTR records when searching for a host name.
3480 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3481 addresses that are only in /etc/hosts are still found.
3482
3483 This behaviour is, however, controlled by an option called host_lookup_
3484 order, which defaults to "bydns:byaddr". If people want to use the other
3485 order, or indeed, just use one or the other means of lookup, they can
3486 specify it in this variable.
3487
3488 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3489 some operating systems, this comes back from gethostbyaddr() as an empty
3490 string, and this is what Exim used to test for. However, it seems that in
3491 other systems, "." is yielded. Exim now tests for this case too.
3492
3493 7. The values of check_spool_space and check_log_space are now held internally
3494 as a number of kilobytes instead of an absolute number of bytes. If a
3495 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3496 kilobyte. This means that much larger values can be stored.
3497
3498 8. Exim monitor: an attempt to get the action menu when not actually pointing
3499 at a message produces an empty menu entitled "No message selected". This
3500 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3501 no entries in it ("Shell widget menu has zero width and/or height"). So I
3502 have added a single, blank menu entry in this case.
3503
3504 9. Added ${quote_local_part.
3505
350610. MIME decoding is now applied to the contents of Subject: header lines when
3507 they are logged.
3508
350911. Now that a reference to $sender_host_address automatically causes a reverse
3510 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3511 host lookup before query-style lookups in lists that might use this
3512 variable. This has therefore been abolished, and the "net-" prefix is no
3513 longer necessary for query-style lookups.
3514
351512. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3516 have been a typo for LFLAGS, so it has been changed.
3517
351813. The install script calls Exim with "-C /dev/null" in order to find the
3519 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3520 to be output. Howeve, since Exim outputs its version number before the
3521 error, it didn't break the script. It just looked ugly. I fixed this by
3522 always allowing "-C /dev/null" if the caller is root.
3523
352414. Ignore overlarge ACL variable number when reading spool file - insurance
3525 against a later release with more variables having written the file.
3526
352715. The standard form for an IPv6 address literal was being rejected by EHLO.
3528 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3529 this, as well as the form without the "IPv6" on the front.
3530
353116. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3532 OS/Makefile-Darwin file.
3533
353417. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3535 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3536
353718. After change 4.21/52, "%ld" was used to format the contents of the $inode
3538 variable. However, some OS use ints for inodes. I've added cast to long int
3539 to get rid of the compiler warning.
3540
354119. I had forgotten to lock out "/../" in configuration file names when
3542 ALT_CONFIG_PREFIX was set.
3543
354420. Routers used for verification do not need to specify transports. However,
3545 if such a router generated a host list, and callout was configured, Exim
3546 crashed, because it could not find a port number from the (non-existent)
3547 transport. It now assumes port 25 in this circumstance.
3548
354921. Added the -t option to exigrep.
3550
355122. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3552 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3553 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3554 them is set, LOOKUP_LSEARCH is forced.
3555
355623. "exim -bV" now outputs a list of lookups that are included in the binary.
3557
355824. Added sender and host information to the "rejected by local_scan()" log
3559 line; previously there was no indication of these.
3560
356125. Added .include_if_exists.
3562
356326. Change 3.952/11 added an explicit directory sync on top of a file sync for
3564 Linux. It turns out that not all file systems support this. Apparently some
3565 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3566 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3567 not supported on the file descriptor, is now ignored when Exim is trying to
3568 sync a directory. This applies only to Linux.
3569
357027. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3571
357228. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3573 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3574 this.
3575
357629. Added support for maildirsize files from supplied patch (modified a bit).
3577
357830. The use of :fail: followed by an empty string could lead Exim to respond to
3579 sender verification failures with (e.g.):
3580
3581 550 Verification failed for <xxx>
3582 550 Sender verify failed
3583
3584 where the first response line was missing the '-' that indicates it is not
3585 the final line of the response.
3586
358731. The loop for finding the name of the user that called Exim had a hardwired
3588 limit of 10; it now uses the value of finduser_retries, which is used for
3589 all other user lookups.
3590
359132. Added $received_count variable, available in data and not_smtp ACLs, and at
3592 delivery time.
3593
359433. Exim was neglecting to zero errno before one call of strtol() when
3595 expanding a string and expecting an integer value. On some systems this
3596 resulted in spurious "integer overflow" errors. Also, it was casting the
3597 result into an int without checking.
3598
359934. Testing for a connection timeout using "timeout_connect" in the retry rules
3600 did not work. The code looks as if it has *never* worked, though it appears
3601 to have been documented since at least releast 1.62. I have made it work.
3602
360335. The "timeout_DNS" error in retry rules, also documented since at least
3604 1.62, also never worked. As it isn't clear exactly what this means, and
3605 clearly it isn't a major issue, I have abolished the feature by treating it
3606 as "timeout", and writing a warning to the main and panic logs.
3607
360836. The display of retry rules for -brt wasn't always showing the error code
3609