1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.436 2006/11/17 22:27:41 jetmore Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
10 leftover -K file (the existence of which was triggered by #402).
11 While we were at it, introduced process PID as part of the -K
12 filename. This should rule out race conditions when creating
15 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
16 processing considerably. Previous code took too long for large mails,
17 triggering a timeout which in turn triggers #401.
19 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
20 in the DK code in transports.c. sendfile() is not really portable,
21 hence the _LINUX specificness.
23 TF/01 In the add_headers option to the mail command in an Exim filter,
24 there was a bug that Exim would claim a syntax error in any
25 header after the first one which had an odd number of characters
28 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
29 callout verification, Exim cached a "reject" for the entire domain. This
30 is correct for most verifications, but it is not correct for a recipient
31 verification with use_sender or use_postmaster set, because in that case
32 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
33 case of MAIL FROM:<> rejection from other early rejections (e.g.
34 rejection of HELO). When verifying a recipient using a non-null MAIL
35 address, the cache is ignored if it shows MAIL FROM:<> rejection.
36 Whatever the result of the callout, the value of the domain cache is
37 left unchanged (for any other kind of callout, getting as far as trying
38 RCPT means that the domain itself is ok).
40 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
43 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
44 manifest itself as EPIPE rather than ECONNECT. When tidying away a
45 session, the daemon ignores ECONNECT errors and logs others; it now
46 ignores EPIPE as well.
48 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
49 (quoted-printable decoding).
51 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
52 later the small subsequent patch to fix an introduced bug.
54 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
56 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
58 PH/08 An error is now given if message_size_limit is specified negative.
60 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
61 to be given (somewhat) arbitrary names.
63 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
66 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
67 miscellaneous code fixes
69 PH/10 Added the log_reject_target ACL modifier to specify where to log
72 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
73 hostname. This is wrong, because it relates to the incoming message (and
74 probably the interface on which it is arriving) and not to the outgoing
75 callout (which could be using a different interface). This has been
76 changed to use the value of the helo_data option from the smtp transport
77 instead - this is what is used when a message is actually being sent. If
78 there is no remote transport (possible with a router that sets up host
79 addresses), $smtp_active_hostname is used.
81 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
82 tweaks were necessary in order to get it to work (see also 21 below):
83 (a) The code assumed that strncpy() returns a negative number on buffer
84 overflow, which isn't the case. Replaced with Exim's string_format()
86 (b) There were several signed/unsigned issues. I just did the minimum
87 hacking in of casts. There is scope for a larger refactoring.
88 (c) The code used strcasecmp() which is not a standard C function.
89 Replaced with Exim's strcmpic() function.
90 (d) The code set only $1; it now sets $auth1 as well.
91 (e) A simple test gave the error "authentication client didn't specify
92 service in request". It would seem that Dovecot has changed its
93 interface. Fortunately there's a specification; I followed it and
94 changed what the client sends and it appears to be working now.
96 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
99 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
100 address A is aliased to B and C, where B exists and C does not. Without
101 -v the output is "A verified" because verification stops after a
102 successful redirection if more than one address is generated. However,
103 with -v the child addresses are also verified. Exim was outputting "A
104 failed to verify" and then showing the successful verification for C,
105 with its parentage. It now outputs "B failed to verify", showing B's
106 parentage before showing the successful verification of C.
108 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
109 look up a TXT record in a specific list after matching in a combined
112 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
113 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
114 they consult the DNS. I had assumed they would set it the way they
115 wanted; and indeed my experiments on Linux seem to show that in some
116 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
117 To be on the safe side, however, I have now made the interface to
118 host_find_byname() similar to host_find_bydns(), with an argument
119 containing the DNS resolver options. The host_find_byname() function now
120 sets these options at its start, just as host_find_bydns() does. The smtp
121 transport options dns_qualify_single and dns_search_parents are passed to
122 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
123 of host_find_byname() use the default settings of RES_DEFNAMES
124 (qualify_single) but not RES_DNSRCH (search_parents).
126 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
127 spool_read_header() do less string testing, by means of a preliminary
128 switch on the second character of optional "-foo" lines. (This is
129 overdue, caused by the large number of possibilities that now exist.
130 Originally there were few.) While I was there, I also converted the
131 str(n)cmp tests so they don't re-test the leading "-" and the first
132 character, in the hope this might squeeze out yet more improvement.
134 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
135 flag allowing group syntax was set by the header_syntax check but not
136 turned off, possible causing trouble later; (2) The flag was not being
137 set at all for the header_verify test, causing "group"-style headers to
138 be rejected. I have now set it in this case, and also caused header_
139 verify to ignore an empty address taken from a group. While doing this, I
140 came across some other cases where the code for allowing group syntax
141 while scanning a header line wasn't quite right (mostly, not resetting
142 the flag correctly in the right place). These bugs could have caused
143 trouble for malformed header lines. I hope it is now all correct.
145 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
146 with the "reply" argument non-NULL. The code, however (which originally
147 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
148 but it didn't always do it. This confused somebody who was copying the
149 code for some other use. I have removed all the tests.
151 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
152 feature that was used to support insecure browsers during the U.S. crypto
153 embargo. It requires special client support, and Exim is probably the
154 only MTA that supported it -- and would never use it because real RSA is
155 always available. This code has been removed, because it had the bad
156 effect of slowing Exim down by computing (never used) parameters for the
157 RSA_EXPORT functionality.
159 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
160 authenticator to fail if there's a tab character in the incoming data
161 (there should never be unless someone is messing about, as it's supposed
162 to be base64-encoded). Also added, on Timo's advice, the "secured" option
163 if the connection is using TLS or if the remote IP is the same as the
164 local IP, and the "valid-client-cert option" if a client certificate has
167 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
168 authenticators. This can be used for authorization after authentication
169 succeeds. (In the case of plaintext, it servers for both authentication
172 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
173 if any retry times were supplied.
175 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
176 connection, where there is no client IP address to check. In this
177 situation, the verify now always succeeds.
179 PH/25 Applied John Jetmore's -Mset patch.
181 PH/26 Added -bem to be like -Mset, but loading a message from a file.
183 PH/27 In a string expansion for a processed (not raw) header when multiple
184 headers of the same name were present, leading whitespace was being
185 removed from all of them, but trailing whitespace was being removed only
186 from the last one. Now trailing whitespace is removed from each header
187 before concatenation. Completely empty headers in a concatenation (as
190 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
191 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
193 PH/29 [Removed. This was a change that I later backed out, and forgot to
194 correct the ChangeLog entry (that I had efficiently created) before
195 committing the later change.]
197 PH/30 Exim was sometimes attempting to deliver messages that had suffered
198 address errors (4xx response to RCPT) over the same connection as other
199 messages routed to the same hosts. Such deliveries are always "forced",
200 so retry times are not inspected. This resulted in far too many retries
201 for the affected addresses. The effect occurred only when there were more
202 hosts than the hosts_max_try setting in the smtp transport when it had
203 the 4xx errors. Those hosts that it had tried were not added to the list
204 of hosts for which the message was waiting, so if all were tried, there
205 was no problem. Two fixes have been applied:
207 (i) If there are any address or message errors in an SMTP delivery, none
208 of the hosts (tried or untried) are now added to the list of hosts
209 for which the message is waiting, so the message should not be a
210 candidate for sending over the same connection that was used for a
211 successful delivery of some other message. This seems entirely
212 reasonable: after all the message is NOT "waiting for some host".
213 This is so "obvious" that I'm not sure why it wasn't done
214 previously. Hope I haven't missed anything, but it can't do any
215 harm, as the worst effect is to miss an optimization.
217 (ii) If, despite (i), such a delivery is accidentally attempted, the
218 routing retry time is respected, so at least it doesn't keep
219 hammering the server.
221 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
222 in ${readsocket because some servers need this prod.
224 PH/32 Added some extra debug output when updating a wait-xxx database.
226 PH/33 The hint "could be header name not terminated by colon", which has been
227 given for certain expansion errors for a long time, was not being given
228 for the ${if def:h_colon_omitted{... case.
230 PH/34 The spec says: "With one important exception, whenever a domain list is
231 being scanned, $domain contains the subject domain." There was at least
232 one case where this was not true.
234 PH/35 The error "getsockname() failed: connection reset by peer" was being
235 written to the panic log as well as the main log, but it isn't really
236 panic-worthy as it just means the connection died rather early on. I have
237 removed the panic log writing for the ECONNRESET error when getsockname()
240 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
241 runs only) independently of the message's sender address. This meant
242 that, if the 4xx error was in fact related to the sender, a different
243 message to the same recipient with a different sender could confuse
244 things. In particualar, this can happen when sending to a greylisting
245 server, but other circumstances could also provoke similar problems.
246 I have changed the default so that the retry time for these errors is now
247 based a combination of the sender and recipient addresses. This change
248 can be overridden by setting address_retry_include_sender=false in the
251 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
252 remote server are returned as part of bounce messages. This was not
253 happening for LMTP over a pipe (the lmtp transport), but now it is the
254 same for both kinds of LMTP.
256 PH/38 Despite being documented as not happening, Exim was rewriting addresses
257 in header lines that were in fact CNAMEs. This is no longer the case.
259 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
260 and queue runs started by the daemon processed all messages. This has
261 been fixed so that -R and -S can now usefully be given with -q<time>.
263 PH/40 Import PCRE release 6.7 (fixes some bugs).
265 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
267 PH/42 Give an error if -q is specified more than once.
269 PH/43 Renamed the variables $interface_address and $interface_port as
270 $received_ip_address and $received_port, to make it clear that these
271 values apply to message reception, and not to the outgoing interface when
272 a message is delivered. (The old names remain recognized, of course.)
274 PH/44 There was no timeout on the connect() call when using a Unix domain
275 socket in the ${readsocket expansion. There now is.
277 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
278 be meaningful with "accept".
280 SC/01 Eximstats V1.43
281 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
283 SC/02 Eximstats V1.44
284 Use a glob alias rather than an array ref in the generated
285 parser. This improves both readability and performance.
287 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
288 Collect SpamAssassin and rejection statistics.
289 Don't display local sender or destination tables unless
290 there is data to show.
291 Added average volumes into the top table text output.
293 SC/04 Eximstats V1.46
294 Collect data on the number of addresses (recipients)
295 as well as the number of messages.
297 SC/05 Eximstats V1.47
298 Added 'Message too big' to the list of mail rejection
299 reasons (thanks to Marco Gaiarin).
301 SC/06 Eximstats V1.48
302 Mainlog lines which have GMT offsets and are too short to
303 have a flag are now skipped.
305 SC/07 Eximstats V1.49 (Alain Williams)
306 Added the -emptyok flag.
308 SC/08 Eximstats V1.50
309 Fixes for obtaining the IP address from reject messages.
311 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
312 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
313 whitesspace changes from 4.64-PH/27
315 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
318 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
319 are found, allow negative numbers in numeric criteria)
321 JJ/06 exipick.20061117.2, added new $message_body_missing variable
323 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
324 to match changes made in 4.64-PH/43
331 SC/01 Use a glob alias rather than an array ref in eximstats generated
332 parser. This improves both readability and performance.
334 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
335 Don't display local sender or destination tables in eximstats unless
336 there is data to show.
337 Added average volumes into the eximstats top table text output.
339 SC/03 Collect data on the number of addresses (recipients) as well
340 as the number of messages in eximstats.
342 TF/01 Correct an error in the documentation for the redirect router. Exim
343 does (usually) call initgroups() when daemonizing.
345 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
346 with consistent privilege compared to when running as a daemon.
348 TF/03 Note in the spec that $authenticated_id is not set for local
349 submissions from trusted users.
351 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
352 Thanks to Dean Brooks <dean@iglou.com> for the patch.
354 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
355 by adding some example configuration directives to the default
356 configuration file. A little bit of work is required to uncomment the
357 directives and define how usernames and passwords are checked, but
358 there is now a framework to start from.
360 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
361 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
362 without this. I don't know how relevant this is to other LDAP libraries.
364 PH/02 Add the verb name to the "unknown ACL verb" error.
366 PH/03 Magnus Holmgren's patch for filter_prepend_home.
368 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
370 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
371 directory not expanded when it should be if an expanded home directory
372 was set for the address (which is overridden by the transport).
374 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
377 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
378 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
379 because it is too late at that time, and has no effect.
381 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
382 security issue with \' (bugzilla #107). I could not use the
383 PQescapeStringConn() function, because it needs a PGconn value as one of
386 PH/08 When testing addresses using -bt, indicate those final addresses that
387 are duplicates that would not cause an additional delivery. At least one
388 person was confused, thinking that -bt output corresponded to deliveries.
389 (Suppressing duplicates isn't a good idea as you lose the information
390 about possibly different redirections that led to the duplicates.)
392 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
393 systems where poll() doesn't work, in particular OS X.
395 PH/10 Added more information to debugging output for retry time not reached.
397 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
398 operations in malware.c.
400 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
403 PH/13 If write_rejectlog was set false when logging was sent to syslog with
404 syslog_duplication set false, log lines that would normally be written
405 both the the main log and to the reject log were not written to syslog at
408 PH/14 In the default configuration, change the use of "message" in ACL warn
409 statements to "add_header".
411 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
412 not followed by a command (e.g. "seen endif").
414 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
415 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
418 PH/17 Added extra conditions to the default value of delay_warning_condition
422 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
423 { match{$h_precedence:}{(?i)bulk|list|junk} } \
424 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
427 The Auto-Submitted: and various List- headers are standardised, whereas I
428 don't think Precedence: ever was.
430 PH/18 Refactored debugging code in route_finduser() to show more information,
431 in particular, the error code if getpwnam() issues one.
433 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
434 This is apparently needed in addition to the PH/07 change above to avoid
435 any possible encoding problems.
437 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
438 but not after initializing Perl.
440 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
441 output them only if debugging. By default they are written stderr,
442 apparently, which is not desirable.
444 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
447 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
450 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
452 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
453 authenticated or an ident call has been made. Suppress the default
454 values for $authenticated_id and $authenticated_sender (but permit -oMai
455 and -oMas) when testing with -bh.
457 PH/24 Re-jigged the order of the tests in the default configuration so that the
458 tests for valid domains and recipients precede the DNS black list and CSA
459 tests, on the grounds that those ones are more expensive.
461 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
462 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
463 This bug exists in every version of Exim that I still have, right back to
466 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
467 However, an attempt to turn on case-sensitivity in a regex key by
468 including (?-i) didn't work because the subject string was already
469 lowercased, and the effects were non-intuitive. It turns out that a
470 one-line patch can be used to allow (?-i) to work as expected.
476 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
477 other effects) broke the use of negated acl sub-conditions.
479 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
482 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
483 "Deny" causes Exim to reject the incoming connection with a 554 error.
484 Unfortunately, if there is a major crisis, such as a disk failure,
485 tcp-wrappers gives "deny", whereas what one would like would be some
486 kind of temporary error. A kludge has been added to help with this.
487 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
488 554 error is used if errno is still zero or contains ENOENT (which occurs
489 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
492 PH/03 Add -lutil to the default FreeBSD LIBS setting.
494 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
495 errors. Otherwise a message that provokes a temporary error (when other
496 messages do not) can cause a whole host to time out.
498 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
499 addresses were routed directly to files or pipes from a redirect router.
500 File deliveries just didn't batch; pipe deliveries might have suffered
503 PH/06 A failure to get a lock for a hints database would erroneously always say
504 "Failed to get write lock", even when it was really a read lock.
506 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
507 of 0600. This has been changed to use the value of the lockfile_mode
508 option (which defaults to 0600).
510 PH/08 Applied small patch from the Sieve maintainer.
512 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
513 folder from quota calculations, a direct delivery into this folder messed
514 up the contents of the maildirsize file. This was because the regex was
515 used only to exclude .Trash (or whatever) when the size of the mailbox
516 was calculated. There was no check that a delivery was happening into an
517 excluded directory. This bug has been fixed by ignoring all quota
518 processing for deliveries into excluded directories.
520 PH/10 Added the maildirfolder_create_regex option to appendfile.
526 PH/01 The code for finding all the local interface addresses on a FreeBSD
527 system running IPv6 was broken. This may well have applied to all BSD
528 systems, as well as to others that have similar system calls. The broken
529 code found IPv4 interfaces correctly, but gave incorrect values for the
530 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
531 that it would not match correctly against @[] and not recognize the IPv6
534 PH/02 The ipliteral router was not recognizing addresses of the form user@
535 [ipv6:....] because it didn't know about the "ipv6:" prefix.
537 PH/03 Added disable_ipv6.
539 PH/04 Changed $reply_address to use the raw form of the headers instead of the
540 decoded form, because it is most often used to construct To: headers
541 lines in autoreplies, and the decoded form may well be syntactically
542 invalid. However, $reply_address has leading white space removed, and all
543 newlines turned into spaces so that the autoreply transport does not
546 PH/05 If group was specified without a user on a router, and no group or user
547 was specified on a transport, the group from the router was ignored.
549 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
550 for visible compile-time settings that can be used to change these
551 numbers, for those that want even more. Backwards compatibility with old
552 spool files has been maintained. However, going back to a previous Exim
553 release will lost any variables that are in spool files.
555 PH/07 Two small changes when running in the test harness: increase delay when
556 passing a TCP/IP connection to a new process, in case the original
557 process has to generate a bounce, and remove special handling of
558 127.0.0.2 (sic), which is no longer necessary.
560 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
561 be the same on different OS.
563 PH/09 Moved a debug statement in filter processing to avoid a race problem when
566 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
567 whether --show-vars was specified or not
569 JJ/02 exipick: Added support for new ACL variable spool format introduced
572 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
573 syntactically invalid From: or Reply-to: line, and a filter used this to
574 generate an autoreply, and therefore failed to obtain an address for the
575 autoreply, Exim could try to deliver to a non-existent relative file
576 name, causing unrelated and misleading errors. What now happens is that
577 it logs this as a hard delivery error, but does not attempt to create a
580 PH/11 The exinext utility has a -C option for testing purposes, but although
581 the given file was scanned by exinext itself; it wasn't being passed on
582 when Exim was called.
584 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
585 an end-of-file indication when reading a command response.
587 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
588 compiled. In many other places in Exim, IPv6 addresses are always
589 recognized, so I have changed this. It also means that IPv4 domain
590 literals of the form [IPV4:n.n.n.n] are now always recognized.
592 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
593 used if the router is not running as root, for example, when verifying at
594 ACL time, or when using -bh. The debugging output from this situation was
595 non-existent - all you got was a failure to exec. I have made two
598 (a) Failures to set uid/gid, the current directory, or a process leader
599 in a subprocess such as that created by queryprogram now generate
600 suitable debugging ouput when -d is set.
602 (b) The queryprogram router detects when it is not running as root,
603 outputs suitable debugging information if -d is set, and then runs
604 the subprocess without attempting to change uid/gid.
606 PH/15 Minor change to Makefile for building test_host (undocumented testing
609 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
610 additional section of a DNS packet that returns MX or SRV records.
611 Instead, it always explicitly searches for A/AAAA records. This avoids
612 major problems that occur when a DNS server includes only records of one
613 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
614 fixed another bug: if SRV records were looked up and the corresponding
615 address records were *not* found in the additional section, the port
616 values from the SRV records were lost.
618 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
619 using the correct key (the original address) when searching the retry
620 rules in order to find which one to use for generating the retry hint.
622 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
623 adding the default one. Similarly, if it contains a Reply-To: header, the
624 errors_reply_to option, if set, is not used.
626 PH/19 When calculating a retry time, Exim used to measure the "time since
627 failure" by looking at the "first failed" field in the retry record. Now
628 it does not use this if it is later than than the arrival time of the
629 message. Instead it uses the arrival time. This makes for better
630 behaviour in cases where some deliveries succeed, thus re-setting the
631 "first failed" field. An example is a quota failure for a huge message
632 when small messages continue to be delivered. Without this change, the
633 "time since failure" will always be short, possible causing more frequent
634 delivery attempts for the huge message than are intended.
635 [Note: This change was subsequently modified - see PH/04 for 4.62.]
637 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
638 $1, $2, $3) because the numerical variables can be reset during some
639 expansion items (e.g. "match"), thereby losing the authentication data.
641 PH/21 Make -bV show the size of off_t variables so that the test suite can
642 decide whether to run tests for quotas > 2G.
644 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
645 mailbox_size, and mailbox_filecount in the appendfile transport. If a
646 filecount value is greater than 2G or if a quota value is greater than 2G
647 on a system where the size of off_t is not greater than 4, a panic error
650 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
651 never match. The debug and -bh output now contains an explicit error
652 message indicating a malformed IPv4 address or mask.
654 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
655 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
658 PH/25 Do not write to syslog when running in the test harness. The only
659 occasion when this arises is a failure to open the main or panic logs
660 (for which there is an explicit test).
662 PH/26 Added the /no_tell option to "control=freeze".
664 PH/27 If a host name lookup failed very early in a connection, for example, if
665 the IP address matched host_lookup and the reverse lookup yielded a name
666 that did not have a forward lookup, an error message of the form "no IP
667 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
668 could be logged. Now it outputs the IP address instead of "NULL".
670 PH/28 An enabling patch from MH: add new function child_open_exim2() which
671 allows the sender and the authenticated sender to be set when
672 submitting a message from within Exim. Since child_open_exim() is
673 documented for local_scan(), the new function should be too.
675 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
676 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
677 results in an empty string is now treated as unset.
679 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
681 PH/31 Added sender_verify_fail logging option.
683 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
684 needed by RFC 822 but not by RFC 2822 was commented out. I have now
685 tidied the source and removed it altogether.
687 PH/33 When a queue run was abandoned because the load average was too high, a
688 log line was always written; now it is written only if the queue_run log
689 selector is set. In addition, the log line for abandonment now contains
690 information about the queue run such as the pid. This is always present
691 in "start" and "stop" lines but was omitted from the "abandon" line.
693 PH/34 Omit spaces between a header name and the colon in the error message that
694 is given when verify = headers_syntax fails (if there are lots of them,
695 the message gets confusing).
697 PH/35 Change the default for dns_check_names_pattern to allow slashes within
698 names, as there are now some PTR records that contain slashes. This check
699 is only to protect against broken name servers that fall over on strange
700 characters, so the fact that it applies to all lookups doesn't matter.
702 PH/36 Now that the new test suite is complete, we can remove some of the
703 special code in Exim that was needed for the old test suite. For example,
704 sorting DNS records because real resolvers return them in an arbitrary
705 order. The new test suite's fake resolver always returns records in the
708 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
709 bounces) except when queue_only is set, to avoid logging races between
710 the different processes.
712 PH/38 Panic-die if .include specifies a non-absolute path.
714 PH/39 A tweak to the "H" retry rule from its user.
716 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
717 a label. They prevented compilation on older perls.
719 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
720 a warning to be raised on newish perls.
722 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
723 on queue. Changes to match documented behaviour of showing count of
724 messages matching specified criteria.
726 PH/40 Changed the default ident timeout from 30s to 5s.
728 PH/41 Added support for the use of login_cap features, on those BSD systems
729 that have them, for controlling the resources used by pipe deliveries.
731 PH/42 The content-scanning code uses fopen() to create files in which to put
732 message data. Previously it was not paying any attention to the mode of
733 the files. Exim runs with umask(0) because the rest of the code creates
734 files with open(), and sets the required mode explicitly. Thus, these
735 files were ending up world-writeable. This was not a big issue, because,
736 being within the spool directory, they were not world-accessible. I have
737 created a function called modefopen, which takes an additional mode
738 argument. It sets umask(777), creates the file, chmods it to the required
739 mode, then resets the umask. All the relevant calls to fopen() in the
740 content scanning code have been changed to use this function.
742 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
743 to 24 hours. This avoids potential overflow problems when processing G
744 and H retry rules. I suspect nobody ever tinkers with this value.
746 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
748 PH/45 When the plaintext authenticator is running as a client, the server's
749 challenges are checked to ensure they are valid base64 strings. By
750 default, the authentication attempt is cancelled if an invalid string is
751 received. Setting client_ignore_invalid_base64 true ignores these errors.
752 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
753 they are received. Thus, the responses can be made to depend on the
754 challenges. If an invalid string is ignored, an empty string is placed in
757 PH/46 Messages that are created by the autoreply transport now contains a
758 References: header, in accordance with RFCs 2822 and 3834.
760 PH/47 Added authenticated_sender_force to the smtp transport.
762 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
764 PH/49 Installed latest patch from the Sieve maintainer.
766 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
767 was also set, the appendfile transport was unnecessarily scanning a
768 directory of message files (e.g. for maildir delivery) to find the count
769 of files (along with the size), even though it did not need this
770 information. It now does the scan only if it needs to find either the
771 size of the count of files.
773 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
775 PH/52 Two bugs concerned with error handling when the smtp transport is
778 (i) Exim was not creating retry information for temporary errors given
779 for individual recipients after the DATA command when the smtp transport
780 was used in LMTP mode. This meant that they could be retried too
781 frequently, and not timed out correctly.
783 (ii) Exim was setting the flag that allows error details to be returned
784 for LMTP errors on RCPT commands, but not for LMTP errors for individual
785 recipients that were returned after the DATA command.
787 PH/53 This is related to PH/52, but is more general: for any failing address,
788 when detailed error information was permitted to be returned to the
789 sender, but the error was temporary, then after the final timeout, only
790 "retry timeout exceeded" was returned. Now it returns the full error as
791 well as "retry timeout exceeded".
793 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
794 do this, and (what is worse) MTAs that accept it.
796 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
797 will now be deprecated.
799 PH/56 New os.c-cygwin from the Cygwin maintainer.
801 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
802 formats (previously only available in exim formats via -bpr, -bpru,
803 and -bpra. Now also available in native and exiqgrep formats)
805 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
806 with very large, slow to parse queues
808 JJ/08 exipick: added ! as generic prefix to negate any criteria format
810 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
812 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
813 responses to authentication challenges, though it was showing the
814 challenges; (ii) I've removed the CR characters from the debug output for
817 PH/58 Allow for the insertion of a newline as well as a space when a string
818 is turned into more than one encoded-word during RFC 2047 encoding. The
819 Sieve code now uses this.
821 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
822 data_4xx, lost_connection, tls_required.
824 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
825 message was being sent as an SMTP response.
827 PH/61 Add -l and -k options to exicyclog.
829 PH/62 When verifying, if an address was redirected to one new address, so that
830 verification continued, and the new address failed or deferred after
831 having set something in $address_data, the value of $address_data was not
832 passed back to the ACL. This was different to the case when no
833 redirection occurred. The value is now passed back in both cases.
835 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
836 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
837 use login_cap.h, so on its own it isn't the distinguishing feature. The
838 new name refers directly to the setclassresources() function.
840 PH/65 Added configuration files for NetBSD3.
842 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
844 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
845 is preferred over IPv4.
847 PH/68 The bounce_return_message and bounce_return_body options were not being
848 honoured for bounces generated during the reception of non-SMTP messages.
849 In particular, this applied to messages rejected by the ACL. This bug has
850 been fixed. However, if bounce_return_message is true and bounce_return_
851 body is false, the headers that are returned for a non-SMTP message
852 include only those that have been read before the error was detected.
853 (In the case of an ACL rejection, they have all been read.)
855 PH/69 The HTML version of the specification is now built in a directory called
856 spec_html instead of spec.html, because the latter looks like a path with
857 a MIME-type, and this confuses some software.
859 PH/70 Catch two compiler warnings in sieve.c.
861 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
862 function verify_get_ident() calls ip_connect() to connect a socket, but
863 if the "connect()" function timed out, ip_connect() used to close the
864 socket. However, verify_get_ident() also closes the socket later, and in
865 between Exim writes to the log, which may get opened at this point. When
866 the socket was closed in ip_connect(), the log could get the same file
867 descriptor number as the socket. This naturally causes chaos. The fix is
868 not to close the socket in ip_connect(); the socket should be closed by
869 the function that creates it. There was only one place in the code where
870 this was missing, in the iplookup router, which I don't think anybody now
871 uses, but I've fixed it anyway.
873 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
874 well as to direct DNS lookups. Otherwise the handling of names in host
875 lists is inconsistent and therefore confusing.
881 PH/01 Two changes to the default runtime configuration:
883 (1) Move the checks for relay_from_hosts and authenticated clients from
884 after to before the (commented out) DNS black list checks.
886 (2) Add control=submission to the relay_from_hosts and authenticated
887 clients checks, on the grounds that messages accepted by these
888 statements are most likely to be submissions.
890 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
892 (1) Generate an error if the third argument for the ${prvs expansion is
895 (2) Treat a missing third argument of ${prvscheck as if it were an empty
898 (3) Reset the variables that are obtained from the first argument of
899 ${prvscheck and used in the second argument before leaving the code,
900 because their memory is reclaimed, so using them afterwards may do
903 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
904 one (it's much easier than Tom thought :-).
906 (5) Because of (4), we can now allow for the use of $prvscheck_result
907 inside the third argument.
909 PH/03 For some reason, the default setting of PATH when running a command from
910 a pipe transport was just "/usr/bin". I have changed it to
913 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
914 anything to be listed in the output from -bV.
916 PH/05 When a filter generated an autoreply, the entire To: header line was
917 quoted in the delivery log line, like this:
919 => >A.N.Other <ano@some.domain> <original@ddress> ...
921 This has been changed so that it extracts the operative address. There
922 may be more than one such address. If so, they are comma-separated, like
925 => >ano@some.domain,ona@other.domain <original@ddress> ...
927 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
928 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
929 not being looked up in the rDNS to get a host name, Exim was showing the
930 IP address twice in Received: lines, even though the IP addresses were
931 identical. For example:
933 Received: from [1.2.3.4] (helo=[1.2.3.4])
935 However, if the real host name was known, it was omitting the HELO data
936 if it matched the actual IP address. This has been tidied up so that it
937 doesn't show the same IP address twice.
939 PH/07 When both +timestamp and +memory debugging was on, the value given by
940 $tod_xxx expansions could be wrong, because the tod_stamp() function was
941 called by the debug printing, thereby overwriting the timestamp buffer.
942 Debugging no longer uses the tod_stamp() function when +timestamp is set.
944 PH/08 When the original message was included in an autoreply transport, it
945 always said "this is a copy of the message, including all the headers",
946 even if body_only or headers_only was set. It now gives an appropriate
949 PH/09 Applied a patch from the Sieve maintainer which:
951 o fixes some comments
952 o adds the (disabled) notify extension core
953 o adds some debug output for the result of if/elsif tests
954 o points to the current vacation draft in the documentation
955 and documents the missing references header update
959 o fixes a bug in processing the envelope test (when testing
960 multiple envelope elements, the last element determinted the
963 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
964 Electronic Mail") by including:
966 Auto-submitted: auto-generated
968 in the messages that it generates (bounce messages and others, such as
969 warnings). In the case of bounce messages for non-SMTP mesages, there was
970 also a typo: it was using "Auto_submitted" (underscore instead of
971 hyphen). Since every message generated by Exim is necessarily in response
972 to another message, thes have all been changed to:
974 Auto-Submitted: auto-replied
976 in accordance with these statements in the RFC:
978 The auto-replied keyword:
980 - SHOULD be used on messages sent in direct response to another
981 message by an automatic process,
983 - MUST NOT be used on manually-generated messages,
985 - MAY be used on Delivery Status Notifications (DSNs) and Message
986 Disposition Notifications (MDNs),
988 - MUST NOT be used on messages generated by automatic or periodic
989 processes, except for messages which are automatic responses to
992 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
993 to the default Received: header definition.
995 PH/12 Added log selector acl_warn_skipped (default on).
997 PH/13 After a successful wildlsearch lookup, discard the values of numeric
998 variables because (a) they are in the wrong storage pool and (b) even if
999 they were copied, it wouldn't work properly because of the caching.
1001 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1002 checking when decoding. Apparently there are clients that generate
1003 overlong encoded strings. Why am I not surprised?
1005 PH/15 If the first argument of "${if match_address" was not empty, but did not
1006 contain an "@" character, Exim crashed. Now it writes a panic log message
1007 and treats the condition as false.
1009 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1011 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1012 extension "envelope-auth". The code is finished and in agreement with
1013 other implementations, but there is no documentation so far and in fact,
1014 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1015 not changing the active code.
1017 Print executed "if" and "elsif" statements when debugging is used. This
1018 helps a great deal to understand what a filter does.
1020 Document more things not specified clearly in RFC3028. I had all this
1021 sorted out, when out of a sudden new issues came to my mind. Oops."
1023 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1026 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1027 canonical form (as documented). However, after a host name lookup from
1028 the IP address, check_host() was doing a simple string comparison with
1029 addresses acquired from the DNS when checking that the found name did
1030 have the original IP as one of its addresses. Since any found IPv6
1031 addresses are likely to be in abbreviated form, the comparison could
1032 fail. Luckily, there already exists a function for doing the comparison
1033 by converting both addresses to binary, so now that is used instead of
1034 the text comparison.
1036 PH/20 There was another similar case to PH/19, when a complete host name was
1037 given in a host list; looking up its IP address could give an abbreviated
1038 form, whereas the current host's name might or might not be abbreviated.
1039 The same fix has been applied.
1045 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1046 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1049 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1050 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1052 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1054 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1055 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1056 Also, for "Auto-Submitted", treat anything other than "no" as
1057 non-personal, in accordance with RFC 3834. (Previously it treated
1058 anything starting "auto-" as non-personal.)
1060 TF/01 The control=submission/name=... option had a problem with syntax
1061 errors if the name included a slash character. The /name= option
1062 now slurps the rest of the string, so it can include any characters
1063 but it must come last in the list of options (after /sender_retain
1066 PH/05 Some modifications to the interface to the fake nameserver for the new
1074 TK/01 Added the "success_on_redirect" address verification option. See
1075 NewStuff for rationale and an example.
1077 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1079 PH/02 Patch to exigrep to allow it to work on syslog lines.
1081 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1082 fread() to skip over the body file's header line, because in Cygwin the
1083 header line is locked and is inaccessible.
1085 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1086 co-exist for some time) to make it clear that it is the Exim ID that is
1087 referenced, not the Message-ID: header line.
1089 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1090 string_format() function, because snprintf() does not exist on all
1093 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1094 ${stat: expansion item.
1096 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1097 protocol synchronization error", to keep the pedants happy.
1099 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1100 well as for IRIX systems, when gcc is being used. See the host.c source
1103 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1105 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1108 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1109 transport and to the smtp transport in LMTP mode.
1111 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1113 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1114 run a filter in a subprocess. This could lead to confusion in subsequent
1115 lookups in the parent process. There should also be a search_tidyup() at
1116 the end of the subprocess.
1118 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1119 only if the host matched helo_try_verify_hosts, which caused the
1120 verification to occur when the EHLO/HELO command was issued. The ACL just
1121 tested the remembered result. Now, if a previous verification attempt has
1122 not happened, "verify = helo" does it there and then.
1124 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1126 TK/03 Fix log output including CR from clamd.
1128 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1129 exist provoked a memory error which could cause a segfault.
1131 PH/15 Installed PCRE 6.2
1133 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1135 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1136 of the problem. Specifically, suggested +O2 rather than +O1 for the
1139 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1141 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1142 record, the port was not correctly logged when the outgoing_port log
1143 selector was set (it logged the transort's default port).
1145 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1146 fallback_hosts, and "hosts" in the smtp transport.
1148 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1149 host errors such as "Connection refused".
1151 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1152 authentication with radiusclient 0.4.9:
1154 - Error returned from rc_read_config was caught wrongly
1155 - Username/password not passed on to radius server due to wrong length.
1157 The presumption is that some radiusclient API changes for 4.51/PH/17
1158 were not taken care of correctly. The code is still untested by me (my
1159 Linux distribution still has 0.3.2 of radiusclient), but it was
1160 contributed by a Radius user.
1162 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1163 expanding the "port" option of the smtp transport.
1165 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1166 while reading a MIME header. Thanks to Tom Hughes for a patch.
1168 PH/24 Include config.h inside local_scan.h so that configuration settings are
1171 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1172 that in an ACL for RCPT (for example), you can examine exactly what was
1175 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1176 commands, but it was not correctly comparing the address with the actual
1177 client host address. Thus, it would show the EHLO address in Received:
1178 header lines when this was not necessary.
1180 PH/27 Added the % operator to ${eval:}.
1182 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1183 it should be ignoring failures (because with -C, for example, it has lost
1184 privilege). It wasn't ignoring creation failures other than "already
1187 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1190 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1191 because an input line was too long, either on its own, or by virtue of
1192 too many continuations, the temporary file was not being removed, and the
1193 return code was incorrect.
1195 PH/31 Missing "BOOL" in function definition in filtertest.c.
1197 PH/32 Applied Sieve patches from the maintainer.
1199 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1201 PH/33 Added "verify = not_blind".
1203 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1204 Local/Makefile (with some defaults set). These are used in built scripts
1205 such as exicyclog, but they have never been used in the exim_install
1206 script (though there are many overriding facilities there). I have
1207 arranged that the exim_install script now takes note of these two
1210 PH/35 Installed configuration files for Dragonfly.
1212 PH/36 When a locally submitted message by a trusted user did not contain a
1213 From: header, and the sender address was obtained from -f or from an SMTP
1214 MAIL command, and the trusted user did not use -F to supply a sender
1215 name, $originator_name was incorrectly used when constructing a From:
1216 header. Furthermore, $originator_name was used for submission mode
1217 messages from external hosts without From: headers in a similar way,
1218 which is clearly wrong.
1220 PH/37 Added control=suppress_local_fixups.
1222 PH/38 When log_selector = +received_sender was set, and the addition of the
1223 sender made the log line's construction buffer exactly full, or one byte
1224 less than full, an overflow happened when the terminating "\n" was
1227 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1228 when the result of a list match is failure because a DNS lookup failed.
1230 PH/40 RM_COMMAND is now used in the building process.
1232 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1233 the "build-* directories that it finds.
1235 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1236 address in a domain literal was a prefix of an interface address.
1238 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1239 when verifying a sender address, unless rewrite_headers is false.
1241 PH/44 Wrote a long comment about why errors_to addresses are verified as
1242 recipients, not senders.
1244 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1245 the ratelimit ACL was added.
1247 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1249 PH/46 Added extra information about PostgreSQL errors to the error string.
1251 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1252 avoiding the need to install special zones in a real server. This is
1253 backwards compatible; if it can't find the fake resolver, it drops back.
1254 Thus, both old and new test suites can be run.
1256 TF/02 Added util/ratelimit.pl
1258 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1259 clock is set back in time.
1261 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1262 Candler <B.Candler@pobox.com>.
1264 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1265 OK for addresses that are the result of redirections.
1267 PH/48 A number of further additions for the benefit of the new test suite,
1268 including a fake gethostbyname() that interfaces to the fake DNS resolver
1271 TF/06 The fix for widen_domains has also been applied to qualify_single and
1272 search_parents which are the other dnslookup options that can cause
1275 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1278 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1280 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1281 service" if it encountered an MX record with an empty target hostname.
1282 The message is now "an MX or SRV record indicated no SMTP service".
1284 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1285 if the DNS of the sending site is misconfigured. This is quite a
1286 common situation. This change restores the behaviour of treating a
1287 helo verification defer as a failure.
1289 PH/51 If self=fail was set on a router, the bounce message did not include the
1290 actual error message.
1296 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1298 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1299 command itself ended in error, the underlying message about the transport
1300 filter timeout was being overwritten with the pipe command error. Now the
1301 underlying error message should be appended to the second error message.
1303 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1305 PH/02 Reduce the amount of output that "make" produces by default. Full output
1306 can still be requested.
1308 PH/03 The warning log line about a condition test deferring for a "warn" verb
1309 was being output only once per connection, rather than after each
1310 occurrence (because it was using the same function as for successful
1311 "warn" verbs). This seems wrong, so I have changed it.
1313 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1314 it should not have, which might have caused a crash in the right
1315 circumstances, but probably never did.
1317 PH/04 Installed a modified version of Tony Finch's patch to make submission
1318 mode fix the return path as well as the Sender: header line, and to
1319 add a /name= option so that you can make the user's friendly name appear
1322 TF/03 Added the control = fakedefer ACL modifier.
1324 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1325 Mark Lowes for thorough testing.
1327 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1329 TK/03 Merged latest SRS patch from Miles Wilton.
1331 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1332 with the definition in sysexits.h (which is #included earlier).
1333 Fortunately, Exim does not actually use EX_OK. The code used to try to
1334 preserve the sysexits.h value, by assumimg that macro definitions were
1335 scanned for macro replacements. I have been disabused of this notion,
1336 so now the code just undefines EX_OK before #including unistd.h.
1338 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1339 in the smtp transport. When a block could not be written in a single
1340 write() function, the timeout was being re-applied to each part-write.
1341 This seems wrong - if the receiver was accepting one byte at a time it
1342 would take for ever. The timeout is now adjusted when this happens. It
1343 doesn't have to be particularly precise.
1345 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1346 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1348 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1349 without a domain if the check to <postmaster@domain> fails.
1351 SC/01 Eximstats: added -xls and the ability to specify output files
1352 (patch written by Frank Heydlauf).
1354 SC/02 Eximstats: use FileHandles for outputing results.
1356 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1358 SC/04 Eximstats: fixed display of large numbers with -nvr option
1360 SC/05 Eximstats: fixed merging of reports with empty tables.
1362 SC/06 Eximstats: added the -include_original_destination flag
1364 SC/07 Eximstats: removed tabs and trailing whitespace.
1366 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1368 TK/06 MBOX spool code: Add real "From " MBOX separator line
1369 so the .eml file is really in mbox format (even though
1370 most programs do not really care). Patch from Alex Miller.
1372 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1373 The latter is generated from $received_to and is only set if the
1374 message has one envelope recipient. SA can use these headers,
1375 obviously out-of-the-box. Patch from Alex Miller.
1377 PH/08 The ${def test on a variable was returning false if the variable's
1378 value was "0", contrary to what the specification has always said!
1379 The result should be true unless the variable is empty.
1381 PH/09 The syntax error of a character other than { following "${if
1382 def:variable_name" (after optional whitespace) was not being diagnosed.
1383 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1384 accidental colon was present, for example, could give incorrect results.
1386 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1387 result is used (not including appendfile, where other changes are about
1390 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1391 This involved changing a lot of size variables from int to off_t. It
1392 should work with maildirs and everything.
1394 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1395 spamd dying while we are connected to it.
1397 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1400 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1401 function for BDB 4.3.
1403 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1405 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1406 the sources for PCRE have been re-arranged and more files are now
1409 PH/15 The code I had for printing potentially long long variables in PH/11
1410 above was not the best (it lost precision). The length of off_t variables
1411 is now inspected at build time, and an appropriate printing format (%ld
1412 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1413 to be "long long int" or "long int". This is needed for the internal
1414 formatting function string_vformat().
1416 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1417 the configuration file to be ":syslog", then the script "guesses" where
1418 the logs files are, rather than using the compiled in default. In our
1419 case the guess is not the same as the compiled default, so the script
1420 suddenly stopped working when I started to use syslog. The patch checks
1421 to see if log_file_path is "". If so, it attempts to read it from exim
1422 with no configuration file to get the compiled in version, before it
1423 falls back to the previous guessing code."
1425 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1426 implementing BATV in an Exim configuration. See NewStuff for the gory
1429 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1430 Makefile that are specific to HP-UX.
1432 PH/18 If the "use_postmaster" option was set for a recipient callout together
1433 with the "random" option, the postmaster address was used as the MAIL
1434 FROM address for the random test, but not for the subsequent recipient
1435 test. It is now used for both.
1437 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1438 patch removes a few documentation additions to RFC 3028, because the
1439 latest draft now contains them. It adds the new en;ascii-case comparator
1440 and a new error check for 8bit text in MIME parts. Comparator and
1441 require names are now matched exactly. I enabled the subaddress
1442 extension, but it is not well tested yet (read: it works for me)."
1444 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1445 rework some of the code of TK/09 above to avoid the hardwired use of
1446 "%lld" and "long long". Replaced the call to snprintf() with a call to
1449 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1450 records point to non-existent hosts", "retry timeout exceeded", and
1451 "retry time not reached for any host after a long failure period".
1453 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1454 experimental DomainKeys support:
1456 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1457 (2) On an error such as an illegally used "control", the wrong name for
1458 the control was given.
1460 These problems did NOT occur unless DomainKeys support was compiled.
1462 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1464 PH/24 Added ${if match_ip condition.
1466 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1467 databases so that it will be absolutely obvious if a crash occurs in the
1468 DB library. This is a regular occurrence (often caused by mis-matched
1471 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1472 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1473 picked up on a user's system that detects such things. There doesn't seem
1474 to be a gcc warning option for this - only an attribute that has to be
1475 put on the function's prototype. It seems that in Fedora Core 4 they have
1476 set this on a number of new functions. No doubt there will be more in due
1479 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1480 specify a transport. However, if an address that was verified by such a
1481 router was the subject of a callout, Exim crashed because it tried to
1482 read the rcpt_include_affixes from the non-existent transport. Now it
1483 just assumes that the setting of that option is false. This bug was
1484 introduced by 4.51/PH/31.
1486 PH/28 Changed -d+all to exclude +memory, because that information is very
1487 rarely of interest, but it makes the output a lot bigger. People tend to
1488 do -d+all out of habit.
1490 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1491 code in os-type was giving problems when libc.so lives in lib64, like on
1494 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1495 aren't the modern standard, and it seems that some systems' include files
1496 don't always have them. Exim was already checking for some of the newer
1497 ones like T_AAAA, and defining it itself. I've added checks for all the
1498 record types that Exim uses.
1500 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1501 not automatically generating a new one, as it is supposed to. This
1502 prevented TLS from working. If the file did exist, but contained invalid
1503 data, a new version was generated, as expected. It was only the case of a
1504 non-existent file that was broken.
1506 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1507 with a change in libdomainkeys > 0.64.
1509 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1510 from DNS. If the selector record carries the flag, it now has
1511 precedence over the domain-wide flag.
1513 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1515 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1516 the use of a port name that isn't defined in /etc/services) occurred, the
1517 message was deferred as in a normal delivery, and thus remained on the
1518 spool, instead of being failed because of the mua_wrapper setting. This
1519 is now fixed, and I tidied up some of the mua_wrapper messages at the
1522 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1523 the messages in a hash of arrays rather than using individual hashes.
1524 This is a bit cleaner and results in dramatic memory savings, albeit
1525 at a slight CPU cost.
1527 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1528 as requested by Marc Sherman.
1530 SC/10 Eximstats: added histograms for user specified patterns as requested
1533 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1535 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1536 fopen() in the content-scanning modules that did not already have it.
1542 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1543 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1545 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1547 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1549 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1550 to test Sieve filters that use "vacation".
1552 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1553 that changes the way the GnuTLS parameters are stored in the cache file.
1554 The new format can be generated externally. For backward compatibility,
1555 if the data in the cache doesn't make sense, Exim assumes it has read an
1556 old-format file, and it generates new data and writes a new file. This
1557 means that you can't go back to an older release without removing the
1560 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1561 work if there are any delivery delays because "one_time" forces the
1562 parent to be marked "delivered", so its unseen clone is never tried
1563 again. For this reason, Exim now forbids the simultaneous setting of
1566 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1567 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1568 entry if you want to know the details. The fix, however, neglected to
1569 consider the case when local delivery batching is involved. The test for
1570 "previously delivered" was not happening when checking to see if an
1571 address could be batched with a previous (undelivered) one; under
1572 certain circumstances this could lead to multiple deliveries to the same
1575 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1576 in its include files, and this causes problems building Exim.
1578 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1579 header_syntax) but Exim was just ignoring anything given after a slash.
1580 In particular, this caused confusion with an attempt to use "verify =
1581 reverse_host_lookup/defer_ok". An error is now given when options are
1582 supplied for verify items that do not have them. (Maybe reverse_host_
1583 lookup should have a defer_ok option, but that's a different point.)
1585 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1586 defined by RFC 821) to 2048, because there were problems with some AUTH
1587 commands, and RFC 1869 says the size should be increased for extended
1588 SMTP commands that take arguments.
1590 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1593 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1594 "unknown" error; now it says that the functionality isn't in the binary.
1596 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1597 an address' error message when a string expansion fails (syntax or
1598 whatever). Otherwise the password may appear in the log. Following change
1599 PH/42 below, there is no longer a chance of it appearing in a bounce
1602 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1604 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1605 of its addresses was ever tried. (Bugzilla bug #2.)
1607 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1608 the result incorrectly in the debug output. (It correctly added a newline
1609 to what was transported.)
1611 TF/01 Added $received_time.
1613 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1614 commented out examples of how to interface to a virus scanner and to
1615 SpamAssassin. Also added commented examples of av_scanner and
1616 spamd_address settings.
1618 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1619 and controls are allowed in which ACLs. There were a couple of minor
1620 errors. Some of the entries in the conditions table (which is a table of
1621 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1622 negation of where the condition IS allowed.
1624 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1626 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1627 header file does not have a version number, so I've had to invent a new
1628 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1629 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1630 radiusclient), but it was contributed by a Radius user.
1632 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1633 files or directories, for OpenSSL.
1635 PH/19 When an Exim process that is running as root has to create an Exim log
1636 file, it does so in a subprocess that runs as exim:exim so as to get the
1637 ownership right at creation (otherwise, other Exim processes might see
1638 the file with the wrong ownership). There was no test for failure of this
1639 fork() call, which would lead to the process getting stuck as it waited
1640 for a non-existent subprocess. Forks do occasionally fail when resources
1641 run out. I reviewed all the other calls to fork(); they all seem to check
1644 PH/20 When checking for unexpected SMTP input at connect time (before writing
1645 the banner), Exim was not dealing correctly with a non-positive return
1646 from the read() function. If the client had disconnected by this time,
1647 the result was a log entry for a synchronization error with an empty
1648 string after "input=" when read() returned zero. If read() returned -1
1649 (an event I could not check), uninitialized data bytes were printed.
1650 There were reports of junk text (parts of files, etc) appearing after
1653 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1655 PH/22 Added support for macro redefinition, and (re)definition in between
1656 driver and ACL definitions.
1658 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1659 forgetting to use the resulting value; it was using the unexpanded value.
1661 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1662 hadn't been configured. The fix is from Juergen Kreileder, who
1663 understands it better than I do:
1665 "Here's what I see happening with three configured cyrus_sasl
1666 authenticators configured (plain, login, cram-md5):
1668 On startup auth_cyrus_sasl_init() gets called for each of these.
1669 This means three calls to sasl_listmech() without a specified mech_list.
1670 => SASL tests which mechs of all available mechs actually work
1671 => three warnings about OTP not working
1672 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1674 With the patch, sasl_listmech() also gets called three times. But now
1675 SASL's mech_list option is set to the server_mech specified in the the
1676 authenticator. Or in other words, the answer from sasl_listmech()
1677 gets limited to just the mech you're testing for (which is different
1679 => the return list contains just 'plain' or 'login', 'cram-md5' or
1680 nothing depending on the value of ob->server_mech.
1682 I've just tested the patch: Authentication still works fine,
1683 unavailable mechs specified in the exim configuration are still
1684 caught, and the auth.log warnings about OTP are gone."
1686 PH/25 When debugging is enabled, the contents of the command line are added
1687 to the debugging output, even when log_selector=+arguments is not
1690 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1691 answer is "GNU", and only if the return is "GNU/something" is the answer
1694 PH/27 $acl_verify_message is now set immediately after the failure of a
1695 verification in an ACL, and so is available in subsequent modifiers. In
1696 particular, the message can be preserved by coding like this:
1698 warn !verify = sender
1699 set acl_m0 = $acl_verify_message
1701 Previously, $acl_verify_message was set only while expanding "message"
1702 and "log_message" when a very denied access.
1704 PH/28 Modified OS/os.c-Linux with
1706 -#ifndef OS_LOAD_AVERAGE
1707 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1709 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1710 nomenclature these days.)
1712 PH/29 Installed patch from the Sieve maintainer that adds the options
1713 sieve_useraddress and sieve_subaddress to the redirect router.
1715 PH/30 In these circumstances:
1716 . Two addresses routed to the same list of hosts;
1717 . First host does not offer TLS;
1718 . First host accepts first address;
1719 . First host gives temporary error to second address;
1720 . Second host offers TLS and a TLS session is established;
1721 . Second host accepts second address.
1722 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1723 and peerdn, if requested) that were in fact used only for the second
1726 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1727 attention to any local part prefix or suffix that was matched by the
1728 router that accepted the address. It now behaves in the same way as it
1729 does for delivery: the affixes are removed from the local part unless
1730 rcpt_include_affixes is set on the transport.
1732 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1733 timeout during the DATA phase of an incoming message.
1735 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1736 applied a patch sanctioned by the Sieve maintainer.
1738 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1739 the uid or gid is negative. A case of a negative gid caused this to be
1740 noticed. The fix allows for either to be negative.
1742 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1743 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1746 PH/36 The change PH/12 above was broken. Fixed it.
1748 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1749 the grounds that routing the same address twice would always produce the
1750 same answer. This might have been true once, but it is certainly no
1751 longer true now. Routing a child address may depend on the previous
1752 routing that produced that child. Some complicated redirection strategies
1753 went wrong when messages had multiple recipients, and made Exim's
1754 behaviour dependent on the order in which the addresses were given.
1756 I have moved the duplicate checking until after the routing is complete.
1757 Exim scans the addresses that are assigned to local and remote
1758 transports, and removes any duplicates. This means that more work will be
1759 done, as duplicates will always all be routed, but duplicates are
1760 presumably rare, so I don't expect this is of any significance.
1762 For deliveries to pipes, files, and autoreplies, the duplicate checking
1763 still happens during the routing process, since they are not going to be
1766 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1767 It corrects a timeout issue with spamd. This is Ian's comment: "The
1768 background is that sometimes spamd either never reads data from a
1769 connection it has accepted, or it never writes response data. The exiscan
1770 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1771 blindly assumes that writes won't block so it may never time out."
1773 PH/39 Allow G after quota size as well as K and M.
1775 PH/40 The value set for $authenticated_id in an authenticator may not contain
1776 binary zeroes or newlines because the value is written to log lines and
1777 to spool files. There was no check on this. Now the value is run through
1778 the string_printing() function so that such characters are converted to
1779 printable escape sequences.
1781 PH/41 $message_linecount is a new variable that contains the total number of
1782 lines in the message. Compare $body_linecount, which is the count for the
1785 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1786 bounce and delay warning messages, except in certain special cases, which
1789 (a) An SMTP error message from a remote host;
1790 (b) A message specified in a :fail: redirection;
1791 (c) A message specified in a "fail" command in a system filter;
1792 (d) A message specified in a FAIL return from the queryprogram router;
1793 (e) A message specified by the cannot_route_message router option.
1795 In these cases only, Exim does include the error details in bounce and
1796 warning messages. There are also a few cases where bland messages such
1797 as "unrouteable address" or "local delivery error" are given.
1799 PH/43 $value is now also set for the "else" part of a ${run expansion.
1801 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1802 being worked on, but at least Exim now implements the latest version to
1805 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1806 process to complete was treated as a delivery failure, a timeout while
1807 writing the message to the pipe was logged, but erroneously treated as a
1808 successful delivery. Such timeouts include transport filter timeouts. For
1809 consistency with the overall process timeout, these timeouts are now
1810 treated as errors, giving rise to delivery failures by default. However,
1811 there is now a new Boolean option for the pipe transport called
1812 timeout_defer, which, if set TRUE, converts the failures into defers for
1813 both kinds of timeout. A transport filter timeout is now identified in
1816 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1817 systems where "make" and "gmake" are different, calling "gmake" at top
1818 level broke things. I've arranged for the value of $(MAKE) to be passed
1819 from the Makefile to this script so that it can call the same version of
1823 A note about Exim versions 4.44 and 4.50
1824 ----------------------------------------
1826 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1827 changes of various kinds. As a consequence, a big documentation update was
1828 needed. This delayed the release for rather longer than seemed good, especially
1829 in the light of a couple of (minor) security issues. Therefore, the changes
1830 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1831 release. So 4.44 and 4.50 are in effect two different branches that both start
1834 I have left the 4.50 change log unchanged; it contains all the changes since
1835 4.43. The change log for 4.44 is below; many of its items are identical to
1836 those for 4.50. This seems to be the most sensible way to preserve the
1837 historical information.
1843 1. Minor wording change to the doc/README.SIEVE file.
1845 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1846 computation of the current number of files was incorrect.
1848 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1849 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1852 4. Give more explanation in the error message when the command for a transport
1853 filter fails to execute.
1855 5. There are several places where Exim runs a non-Exim command in a
1856 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1857 was being done only for the command run by the queryprogram router. It is
1858 now done for all such subprocesses. The other cases are: ${run, transport
1859 filters, and the commands run by the lmtp and pipe transports.
1861 6. Added CONFIGURE_GROUP build-time option.
1863 7. Some older OS have a limit of 256 on the maximum number of file
1864 descriptors. Exim was using setrlimit() to set 1000 as a large value
1865 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1866 systems. I've change it so that if it can't get 1000, it tries for 256.
1868 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1869 was an oversight, and furthermore, ever since the addition of extra
1870 controls (e.g. 4.43/32), the checks on when to allow different forms of
1871 "control" were broken. There should now be diagnostics for all cases when a
1872 control that does not make sense is encountered.
1874 9. Added the /retain_sender option to "control=submission".
1876 10. $recipients is now available in the predata ACL (oversight).
1878 11. Tidy the search cache before the fork to do a delivery from a message
1879 received from the command line. Otherwise the child will trigger a lookup
1880 failure and thereby defer the delivery if it tries to use (for example) a
1881 cached ldap connection that the parent has called unbind on.
1883 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1884 of $address_data from the recipient verification was clobbered by the
1885 sender verification.
1887 13. The value of address_data from a sender verification is now available in
1888 $sender_address_data in subsequent conditions in the ACL statement.
1890 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1892 15. Added a new option "connect=<time>" to callout options, to set a different
1895 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1896 was its contents. (It was OK if the option was not defined at all.)
1898 17. A "Completed" log line is now written for messages that are removed from
1899 the spool by the -Mrm option.
1901 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1902 information about exactly what failed.
1904 19. Added -dd to debug only the daemon process.
1906 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1907 handles timeouts, both on the server side and network timeouts. Renamed the
1908 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1910 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1911 It is now set to "smtps".
1913 22. $host_address is now set to the target address during the checking of
1914 ignore_target_hosts.
1916 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1917 being passed; this would have caused $sender_host_name to have been used if
1918 matching the list had actually called for a host name (not very likely,
1919 since this list is usually IP addresses). A host name is now passed as
1922 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1923 code that specifies a non-restarting handler (typically sigaction() in
1924 modern systems) in an attempt to fix a rare and obscure crash bug.
1926 25. Narrowed the window for a race in the daemon that could cause it to ignore
1927 SIGCHLD signals. This is not a major problem, because they are used only to
1928 wake it up if nothing else does.
1930 26. A malformed maildirsize file could cause Exim to calculate negative values
1931 for the mailbox size or file count. Odd effects could occur as a result.
1932 The maildirsize information is now recalculated if the size or filecount
1935 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1936 support for a long time. Removed HAVE_SYS_VFS_H.
1938 28. Installed the latest version of exipick from John Jetmore.
1940 29. In an address list, if the pattern was not a regular expression, an empty
1941 subject address (from a bounce message) matched only if the pattern was an
1942 empty string. Non-empty patterns were not even tested. This was the wrong
1943 because it is perfectly reasonable to use an empty address as part of a
1944 database query. An empty address is now tested by patterns that are
1945 lookups. However, all the other forms of pattern expect the subject to
1946 contain a local part and a domain, and therefore, for them, an empty
1947 address still always fails if the pattern is not itself empty.
1949 30. Exim went into a mad DNS loop when attempting to do a callout where the
1950 host was specified on an smtp transport, and looking it up yielded more
1951 than one IP address.
1953 31. Re-factored the code for checking spool and log partition space into a
1954 function that finds that data and another that does the check. The former
1955 is then used to implement four new variables: $spool_space, $log_space,
1956 $spool_inodes, and $log_inodes.
1958 32. The RFC2047 encoding function was originally intended for short strings
1959 such as real names; it was not keeping to the 75-character limit for
1960 encoded words that the RFC imposes. It now respects the limit, and
1961 generates multiple encoded words if necessary. To be on the safe side, I
1962 have increased the buffer size for the ${rfc2047: expansion operator from
1965 33. It is now permitted to omit both strings after an "if" condition; if the
1966 condition is true, the result is "true". As before, when the second string
1967 is omitted, a false condition yields an empty string. This makes it less
1968 cumbersome to write custom ACL and router conditions.
1970 34. Failure to deliver a bounce message always caused it to be frozen, even if
1971 there was an errors_to setting on the router. The errors_to setting is now
1974 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1975 canonical form (fully expanded) before being placed in
1976 $sender_host_address.
1978 36. The table in the code that translates DNS record types into text (T_A to
1979 "A" for instance) was missing entries for NS and CNAME. It is just possible
1980 that this could have caused confusion if both these types were looked up
1981 for the same domain, because the text type is used as part of Exim's
1982 per-process caching. But the chance of anyone hitting this buglet seems
1985 37. The dnsdb lookup has been extended in a number of ways.
1987 (1) There is a new type, "zns", which walks up the domain tree until it
1988 finds some nameserver records. It should be used with care.
1990 (2) There is a new type, "mxh", which is like "mx" except that it returns
1991 just the host names, not the priorities.
1993 (3) It is now possible to give a list of domains (or IP addresses) to be
1994 looked up. The behaviour when one of the lookups defers can be
1995 controlled by a keyword.
1997 (4) It is now possible to specify the separator character for use when
1998 multiple records are returned.
2000 38. The dnslists ACL condition has been extended: it is now possible to supply
2001 a list of IP addresses and/or domains to be looked up in a particular DNS
2004 39. Added log_selector=+queue_time_overall.
2006 40. When running the queue in the test harness, wait just a tad after forking a
2007 delivery process, to get repeatability of debugging output.
2009 41. Include certificate and key file names in error message when GnuTLS fails
2010 to set them up, because the GnuTLS error message doesn't include the name
2011 of the failing file when there is a problem reading it.
2013 42. Allow both -bf and -bF in the same test run.
2015 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2017 44. The "Exiscan patch" is now merged into the mainline Exim source.
2019 45. Sometimes the final signoff response after QUIT could fail to get
2020 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2021 < 0 before doing a fflush(). This bug looks as though it goes back to the
2022 introduction of TLS in release 3.20, but "sometimes" must have been rare
2023 because the tests only now provoked it.
2025 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2026 (this can affect the format of dates).
2028 47. exim_tidydb, when checking for the continued existence of a message for
2029 which it has found a message-specific retry record, was not finding
2030 messages that were in split spool directories. Consequently, it was
2031 deleting retry records that should have stayed in existence.
2033 48. Steve fixed some bugs in eximstats.
2035 49. The SPA authentication driver was not abandoning authentication and moving
2036 on to the next authenticator when an expansion was forced to fail,
2037 contradicting the general specification for all authenticators. Instead it
2038 was generating a temporary error. It now behaves as specified.
2040 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2041 (the order specifies the preference for clients). The order is now AES256,
2042 AES128, 3DES, ARCFOUR128.
2044 51. Small patch to Sieve code - explicitly set From: when generating an
2047 52. Exim crashed if a remote delivery caused a very long error message to be
2048 recorded - for instance if somebody sent an entire SpamAssassin report back
2049 as a large number of 550 error lines. This bug was coincidentally fixed by
2050 increasing the size of one of Exim's internal buffers (big_buffer) that
2051 happened as part of the Exiscan merge. However, to be on the safe side, I
2052 have made the code more robust (and fixed the comments that describe what
2055 53. Now that there can be additional text after "Completed" in log lines (if
2056 the queue_time_overall log selector is set), a one-byte patch to exigrep
2057 was needed to allow it to recognize "Completed" as not the last thing in
2060 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2061 patch that reportedly fixes this has been added. I am not expert enough to
2062 create a test for it. This is what the patch creator wrote:
2064 "I found a little strange behaviour of ldap code when working with
2065 Windows 2003 AD Domain, where users was placed in more than one
2066 Organization Units. When I tried to give exim partial DN, the exit code
2067 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2068 But simultaneously result of request was absolutely normal ldap result,
2069 so I produce this patch..."
2071 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2072 REFERENCE, so I have modified the code to exclude the patch when that macro
2075 55. Some experimental protocols are using DNS PTR records for new purposes. The
2076 keys for these records are domain names, not reversed IP addresses. The
2077 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2078 leaves it alone. Component reversal etc. now happens only for IP addresses.
2081 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2083 57. Double the size of the debug message buffer (to 2048) so that more of very
2084 long debug lines gets shown.
2086 58. The exicyclog utility now does better if the number of log files to keep
2087 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2089 59. Two changes related to the smtp_active_hostname option:
2091 (1) $smtp_active_hostname is now available as a variable.
2092 (2) The default for smtp_banner uses $smtp_active_hostname instead
2093 of $primary_hostname.
2095 60. The host_aton() function is supposed to be passed a string that is known
2096 to be a valid IP address. However, in the case of IPv6 addresses, it was
2097 not checking this. This is a hostage to fortune. Exim now panics and dies
2098 if the condition is not met. A case was found where this could be provoked
2099 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2100 components; fortuitously, this particular loophole had already been fixed
2101 by change 4.50/55 above.
2103 If there are any other similar loopholes, the new check in host_aton()
2104 itself should stop them being exploited. The report I received stated that
2105 data on the command line could provoke the exploit when Exim was running as
2106 exim, but did not say which command line option was involved. All I could
2107 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2108 running as the user.
2111 61. There was a buffer overflow vulnerability in the SPA authentication code
2112 (which came originally from the Samba project). I have added a test to the
2113 spa_base64_to_bits() function which I hope fixes it.
2116 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2117 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2119 63. The daemon start-up calls getloadavg() while still root for those OS that
2120 need the first call to be done as root, but it missed one case: when
2121 deliver_queue_load_max is set with deliver_drop_privilege. This is
2122 necessary for the benefit of the queue runner, because there is no re-exec
2123 when deliver_drop_privilege is set.
2125 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2126 This has been fixed.
2128 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2129 was in use, was not putting the data itself into the right store pool;
2130 consequently, it could be overwritten for a subsequent message in the same
2131 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2134 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2136 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2137 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2138 the function were treating the return as a boolean value, which happened to
2139 work because 0=false and not-0=true, but is not correct code.
2141 68. The host_aton() function was not handling scoped IPv6 addresses (those
2142 with, for example, "%eth0" on the end) correctly.
2144 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2145 negated items (that is, ~something) in unsigned ints. Some compilers
2146 apparently mutter when there is no cast.
2148 70. If an address verification called from an ACL failed, and did not produce a
2149 user-specific message (i.e. there was only a "system" message), nothing was
2150 put in $acl_verify_message. In this situation, it now puts the system
2153 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2154 session; change 4.31/43 added the unwanted input to the log line - except
2155 that it did not do this in the start of session case. It now does.
2157 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2158 This is wrong and can cause the other end to generate a synchronization
2159 error if it is another Exim or anything else that does the synchronization
2160 check. A QUIT command is no longer sent after a timeout.
2162 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2163 during host lookups.
2165 74. The defer_ok option of callout verification was not working if it was used
2166 when verifying addresses in header lines, that is, for this case:
2168 verify = header_sender/callout=defer_ok
2170 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2171 those file descriptors could be used for SMTP connections. If anything
2172 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2173 could be sent to the SMTP client, causing chaos. The daemon now opens
2174 stdin, stdout, and stderr to /dev/null when it puts itself into the
2177 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2178 log by default. The user can override this with suitable Perl magic.
2180 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2181 the log message when discard triggers, was not working for the DATA ACL or
2182 for the non-SMTP ACL.
2184 78. Error message wording change in sieve.c.
2186 79. If smtp_accept_max_per_host was set, the number of connections could be
2187 restricted to fewer than expected, because the daemon was trying to set up
2188 a new connection before checking whether the processes handling previous
2189 connections had finished. The check for completed processes is now done
2190 earlier. On busy systems, this bug wouldn't be noticed because something
2191 else would have woken the daemon, and it would have reaped the completed
2194 80. If a message was submitted locally by a user whose login name contained one
2195 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2196 It caused a spool format error. I have fixed the spool reading code. A
2197 related problem was that the "from" clause in the Received: line became
2198 illegal because of the space(s). It is now covered by ${quote_local_part.
2200 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2203 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2205 83. Patch from Sieve maintainer to fix unterminated string problem in
2206 "vacation" handling.
2208 84. Some minor changes to the Linux configuration files to help with other
2209 OS variants using glibc.
2211 85. One more patch for Sieve to update vacation handling to latest spec.
2214 ----------------------------------------------------
2215 See the note above about the 4.44 and 4.50 releases.
2216 ----------------------------------------------------
2222 1. Change 4.43/35 introduced a bug that caused file counts to be
2223 incorrectly computed when quota_filecount was set in an appendfile
2226 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2227 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2230 3. Give more explanation in the error message when the command for a transport
2231 filter fails to execute.
2233 4. There are several places where Exim runs a non-Exim command in a
2234 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2235 was being done only for the command run by the queryprogram router. It is
2236 now done for all such subprocesses. The other cases are: ${run, transport
2237 filters, and the commands run by the lmtp and pipe transports.
2239 5. Some older OS have a limit of 256 on the maximum number of file
2240 descriptors. Exim was using setrlimit() to set 1000 as a large value
2241 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2242 systems. I've change it so that if it can't get 1000, it tries for 256.
2244 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2245 was an oversight, and furthermore, ever since the addition of extra
2246 controls (e.g. 4.43/32), the checks on when to allow different forms of
2247 "control" were broken. There should now be diagnostics for all cases when a
2248 control that does not make sense is encountered.
2250 7. $recipients is now available in the predata ACL (oversight).
2252 8. Tidy the search cache before the fork to do a delivery from a message
2253 received from the command line. Otherwise the child will trigger a lookup
2254 failure and thereby defer the delivery if it tries to use (for example) a
2255 cached ldap connection that the parent has called unbind on.
2257 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2258 of $address_data from the recipient verification was clobbered by the
2259 sender verification.
2261 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2262 was its contents. (It was OK if the option was not defined at all.)
2264 11. A "Completed" log line is now written for messages that are removed from
2265 the spool by the -Mrm option.
2267 12. $host_address is now set to the target address during the checking of
2268 ignore_target_hosts.
2270 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2271 being passed; this would have caused $sender_host_name to have been used if
2272 matching the list had actually called for a host name (not very likely,
2273 since this list is usually IP addresses). A host name is now passed as
2276 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2277 code that specifies a non-restarting handler (typically sigaction() in
2278 modern systems) in an attempt to fix a rare and obscure crash bug.
2280 15. Narrowed the window for a race in the daemon that could cause it to ignore
2281 SIGCHLD signals. This is not a major problem, because they are used only to
2282 wake it up if nothing else does.
2284 16. A malformed maildirsize file could cause Exim to calculate negative values
2285 for the mailbox size or file count. Odd effects could occur as a result.
2286 The maildirsize information is now recalculated if the size or filecount
2289 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2290 support for a long time. Removed HAVE_SYS_VFS_H.
2292 18. Updated exipick to current release from John Jetmore.
2294 19. Allow an empty sender to be matched against a lookup in an address list.
2295 Previously the only cases considered were a regular expression, or an
2298 20. Exim went into a mad DNS lookup loop when doing a callout where the
2299 host was specified on the transport, if the DNS lookup yielded more than
2302 21. The RFC2047 encoding function was originally intended for short strings
2303 such as real names; it was not keeping to the 75-character limit for
2304 encoded words that the RFC imposes. It now respects the limit, and
2305 generates multiple encoded words if necessary. To be on the safe side, I
2306 have increased the buffer size for the ${rfc2047: expansion operator from
2309 22. Failure to deliver a bounce message always caused it to be frozen, even if
2310 there was an errors_to setting on the router. The errors_to setting is now
2313 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2314 canonical form (fully expanded) before being placed in
2315 $sender_host_address.
2317 24. Updated eximstats to version 1.33
2319 25. Include certificate and key file names in error message when GnuTLS fails
2320 to set them up, because the GnuTLS error message doesn't include the name
2321 of the failing file when there is a problem reading it.
2323 26. Expand error message when OpenSSL has problems setting up cert/key files.
2326 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2327 (this can affect the format of dates).
2329 28. exim_tidydb, when checking for the continued existence of a message for
2330 which it has found a message-specific retry record, was not finding
2331 messages that were in split spool directories. Consequently, it was
2332 deleting retry records that should have stayed in existence.
2334 29. eximstats updated to version 1.35
2335 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2336 1.35 - bugfix such that pie charts by volume are generated correctly
2338 30. The SPA authentication driver was not abandoning authentication and moving
2339 on to the next authenticator when an expansion was forced to fail,
2340 contradicting the general specification for all authenticators. Instead it
2341 was generating a temporary error. It now behaves as specified.
2343 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2344 (the order specifies the preference for clients). The order is now AES256,
2345 AES128, 3DES, ARCFOUR128.
2347 31. Small patch to Sieve code - explicitly set From: when generating an
2350 32. Exim crashed if a remote delivery caused a very long error message to be
2351 recorded - for instance if somebody sent an entire SpamAssassin report back
2352 as a large number of 550 error lines. This bug was coincidentally fixed by
2353 increasing the size of one of Exim's internal buffers (big_buffer) that
2354 happened as part of the Exiscan merge. However, to be on the safe side, I
2355 have made the code more robust (and fixed the comments that describe what
2358 33. Some experimental protocols are using DNS PTR records for new purposes. The
2359 keys for these records are domain names, not reversed IP addresses. The
2360 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2361 leaves it alone. Component reversal etc. now happens only for IP addresses.
2364 34. The host_aton() function is supposed to be passed a string that is known
2365 to be a valid IP address. However, in the case of IPv6 addresses, it was
2366 not checking this. This is a hostage to fortune. Exim now panics and dies
2367 if the condition is not met. A case was found where this could be provoked
2368 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2369 components; fortuitously, this particular loophole had already been fixed
2370 by change 4.50/55 or 4.44/33 above.
2372 If there are any other similar loopholes, the new check in host_aton()
2373 itself should stop them being exploited. The report I received stated that
2374 data on the command line could provoke the exploit when Exim was running as
2375 exim, but did not say which command line option was involved. All I could
2376 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2377 running as the user.
2380 35. There was a buffer overflow vulnerability in the SPA authentication code
2381 (which came originally from the Samba project). I have added a test to the
2382 spa_base64_to_bits() function which I hope fixes it.
2385 36. The daemon start-up calls getloadavg() while still root for those OS that
2386 need the first call to be done as root, but it missed one case: when
2387 deliver_queue_load_max is set with deliver_drop_privilege. This is
2388 necessary for the benefit of the queue runner, because there is no re-exec
2389 when deliver_drop_privilege is set.
2391 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2392 was in use, was not putting the data itself into the right store pool;
2393 consequently, it could be overwritten for a subsequent message in the same
2394 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2397 38. Sometimes the final signoff response after QUIT could fail to get
2398 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2399 < 0 before doing a fflush(). This bug looks as though it goes back to the
2400 introduction of TLS in release 3.20, but "sometimes" must have been rare
2401 because the tests only now provoked it.
2407 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2408 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2409 Now it returns an integer. A number of calls were still expecting a T/F
2410 return. Fortuitously, in all cases, the tests worked in OK situations,
2411 which is the norm. However, things would have gone wrong on any write
2412 failures on the smtp file descriptor. This function is used when sending
2413 messages over SMTP and also when doing verify callouts.
2415 2. When Exim is called to do synchronous delivery of a locally submitted
2416 message (the -odf or -odi options), it no longer closes stderr before doing
2419 3. Implemented the mua_wrapper option.
2421 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2423 5. Implemented the functions header_remove(), header_testname(),
2424 header_add_at_position(), and receive_remove_recipient(), and exported them
2427 6. If an ACL "warn" statement specified the addition of headers, Exim already
2428 inserted X-ACL-Warn: at the start if there was no header name. However, it
2429 was not making this test for the second and subsequent header lines if
2430 there were newlines in the string. This meant that an invalid header could
2431 be inserted if Exim was badly configured.
2433 7. Allow an ACL "warn" statement to add header lines at the start or after all
2434 the Received: headers, as well as at the end.
2436 8. Added the rcpt_4xx retry error code.
2438 9. Added postmaster_mailfrom=xxx to callout verification option.
2440 10. Added mailfrom=xxxx to the callout verification option, for verify=
2443 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2444 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2446 12. Inserted some casts to stop certain compilers warning when using pointer
2447 differences as field lengths or precisions in printf-type calls (mostly
2448 affecting debugging statements).
2450 13. Added optional readline() support for -be (dynamically loaded).
2452 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2453 same clock tick as a message's arrival, so that its received time was the
2454 same as the "first fail" time on the retry record, and that message
2455 remained on the queue past the ultimate address timeout, every queue runner
2456 would try a delivery (because it was past the ultimate address timeout) but
2457 after another failure, the ultimate address timeout, which should have then
2458 bounced the address, did not kick in. This was a "< instead of <=" error;
2459 in most cases the first failure would have been in the next clock tick
2460 after the received time, and all would be well.
2462 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2463 being recognized when the domain list was tested by the match_domain
2464 condition in an expansion string.
2466 16. Added the ${str2b64: operator.
2468 17. Exim was always calling setrlimit() to set a large limit for the number of
2469 processes, without checking whether the existing limit was already
2470 adequate. (It did check for the limit on file descriptors.) Furthermore,
2471 errors from getrlimit() and setrlimit() were being ignored. Now they are
2472 logged to the main and panic logs, but Exim does carry on, to try to do its
2473 job under whatever limits there are.
2475 18. Imported PCRE 5.0.
2477 19. Trivial typo in log message " temporarily refused connection" (the leading
2480 20. If the log selector return_path_on_delivery was set and an address was
2481 redirected to /dev/null, the delivery process crashed because it assumed
2482 that a return path would always be set for a "successful" delivery. In this
2483 case, the whole delivery is bypassed as an optimization, and therefore no
2486 21. Internal re-arrangement: the function for sending a challenge and reading
2487 a response while authentication was assuming a zero-terminated challenge
2488 string. It's now changed to take a pointer and a length, to allow for
2489 binary data in such strings.
2491 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2493 23. Exim was not respecting finduser_retries when seeking the login of the
2494 uid under which it was called; it was always trying 10 times. (The default
2495 setting of finduser_retries is zero.) Also, it was sleeping after the final
2496 failure, which is pointless.
2498 24. Implemented tls_on_connect_ports.
2500 25. Implemented acl_smtp_predata.
2502 26. If the domain in control=submission is set empty, Exim assumes that the
2503 authenticated id is a complete email address when it generates From: or
2504 Sender: header lines.
2506 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2507 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2508 chown and chgrp in /bin and hostname in /usr/bin.
2510 28. Exim was keeping the "process log" file open after each use, just as it
2511 does for the main log. This opens the possibility of it remaining open for
2512 long periods when the USR1 signal hits a daemon. Occasional processlog
2513 errors were reported, that could have been caused by this. Anyway, it seems
2514 much more sensible not to leave this file open at all, so that is what now
2517 29. The long-running daemon process does not normally write to the log once it
2518 has entered its main loop, and it closes the log before doing so. This is
2519 so that log files can straightforwardly be renamed and moved. However,
2520 there are a couple of unusual error situations where the daemon does write
2521 log entries, and I had neglected to close the log afterwards.
2523 30. The text of an SMTP error response that was received during a remote
2524 delivery was being truncated at 512 bytes. This is too short for some of
2525 the long messages that one sometimes sees. I've increased the limit to
2528 31. It is now possible to make retry rules that apply only when a message has a
2529 specific sender, in particular, an empty sender.
2531 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2532 it possible to be selective about when SMTP synchronization is enforced.
2534 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2536 32. Implemented hosts_connection_nolog.
2538 33. Added an ACL for QUIT.
2540 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2543 35. Added mailbox_size and mailbox_filecount to appendfile.
2545 36. Added control = no_multiline_responses to ACLs.
2547 37. There was a bug in the logic of the code that waits for the clock to tick
2548 in the case where the clock went backwards by a substantial amount such
2549 that the microsecond fraction of "now" was more than the microsecond
2550 fraction of "then" (but the whole seconds number was less).
2552 38. Added support for the libradius Radius client library this is found on
2553 FreeBSD (previously only the radiusclient library was supported).
2559 1. When certain lookups returned multiple values in the form name=value, the
2560 quoting of the values was not always being done properly. Specifically:
2561 (a) If the value started with a double quote, but contained no whitespace,
2563 (b) If the value contained whitespace other than a space character (i.e.
2564 tabs or newlines or carriage returns) it was not quoted.
2565 This fix has been applied to the mysql and pgsql lookups by writing a
2566 separate quoting function and calling it from the lookup code. The fix
2567 should probably also be applied to nisplus, ibase and oracle lookups, but
2568 since I cannot test any of those, I have not disturbed their existing code.
2570 2. A hit in the callout cache for a specific address caused a log line with no
2571 reason for rejecting RCPT. Now it says "Previous (cached) callout
2572 verification failure".
2574 3. There was an off-by-one bug in the queryprogram router. An over-long
2575 return line was truncated at 256 instead of 255 characters, thereby
2576 overflowing its buffer with the terminating zero. As well as fixing this, I
2577 have increased the buffer size to 1024 (and made a note to document this).
2579 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2580 when Exim is waiting for an SMTP response from a remote server, Exim
2581 restarts its select() call on the socket, thereby resetting its timeout.
2582 This is not a problem when such interrupts are rare. Somebody set up a cron
2583 job to run exiwhat every 2 minutes, which is less than the normal select()
2584 timeout (5 or 10 minutes). This meant that the select() timeout never
2585 kicked in because it was always reset. I have fixed this by comparing the
2586 time when an interrupt arrives with the time at the start of the first call
2587 to select(). If more time than the timeout has elapsed, the interrupt is
2588 treated as a timeout.
2590 5. Some internal re-factoring in preparation for the addition of Sieve
2591 extensions (by MH). In particular, the "personal" test is moved to a
2592 separate function, and given an option for scanning Cc: and Bcc: (which is
2593 not set for Exim filters).
2595 6. When Exim created an email address using the login of the caller as the
2596 local part (e.g. when creating a From: or Sender: header line), it was not
2597 quoting the local part when it contained special characters such as @.
2599 7. Installed new OpenBSD configuration files.
2601 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2602 try to make them clearer.
2604 9. Callout options, other than the timeout value, were being ignored when
2605 verifying sender addresses in header lines. For example, when using
2607 verify = header_sender/callout=no_cache
2609 the cache was (incorrectly) being used.
2611 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2612 only the Cygwin environment.
2614 11. When return_path_on_delivery was set as a log selector, if different remote
2615 addresses in the same message used different return paths and parallel
2616 remote delivery occurred, the wrong values would sometimes be logged.
2617 (Whenever a remote delivery process finished, the return path value from
2618 the most recently started remote delivery process was logged.)
2620 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2621 lines when AUTH and/or TLS are in use. This is the "received protocol"
2622 field. Exim used to use "asmtp" for authenticated SMTP, without any
2623 indication (in the protocol name) for TLS use. Now it follows the RFC and
2624 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2625 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2626 names appear in log lines as well as in Received: header lines.
2628 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2629 extensions, and comparison tests, and to fix some bugs.
2631 14. Changes to the "personal" filter test:
2633 (1) The test was buggy in that it was just doing the equivalent of
2634 "contains" tests on header lines. For example, if a user's address was
2635 anne@some.where, the "personal" test would incorrectly be true for
2637 To: susanne@some.where
2639 This test is now done by extracting each address from the header in turn,
2640 and checking the entire address. Other tests that are part of "personal"
2641 are now done using regular expressions (for example, to check local parts
2642 of addresses in From: header lines).
2644 (2) The list of non-personal local parts in From: addresses has been
2645 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2646 taken from the Sieve specification recommendations.
2648 (3) If the message contains any header line starting with "List-" it is
2649 treated as non-personal.
2651 (4) The test for "circular" in the Subject: header line has been removed
2652 because it now seems ill-conceived.
2654 15. Minor typos in src/EDITME comments corrected.
2656 16. Installed latest exipick from John Jetmore.
2658 17. If headers_add on a router specified a text string that was too long for
2659 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2660 of string_sprintf() is now avoided.
2662 18. $message_body_size was not set (it was always zero) when running the DATA
2663 ACL and the local_scan() function.
2665 19. For the "mail" command in an Exim filter, no default was being set for
2666 the once_repeat time, causing a random time value to be used if "once" was
2667 specified. (If the value happened to be <= 0, no repeat happened.) The
2668 default is now 0s, meaning "never repeat". The "vacation" command was OK
2669 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2670 (I found it when inspecting the code).
2672 20. There is now an overall timeout for performing a callout verification. It
2673 defaults to 4 times the callout timeout, which applies to individual SMTP
2674 commands during the callout. The overall timeout applies when there is more
2675 than one host that can be tried. The timeout is checked before trying the
2676 next host. This prevents very long delays if there are a large number of
2677 hosts and all are timing out (e.g. when the network connections are timing
2678 out). The value of the overall timeout can be changed by specifying an
2679 additional sub-option for "callout", called "maxwait". For example:
2681 verify = sender/callout=5s,maxwait=20s
2683 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2684 to the end before writing, but this should make it even safer).
2686 22. Exim was forgetting that it had advertised PIPELINING for the second and
2687 subsequent messages on an SMTP connection. It was also not resetting its
2688 memory on STARTTLS and an internal HELO.
2690 23. When Exim logs an SMTP synchronization error within a session, it now
2691 records whether PIPELINING has been advertised or not.
2693 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2694 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2695 rather than long int.
2697 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2699 26. Added the never_mail option to autoreply.
2705 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2706 crash if the getsockname() call failed; this can happen if a connection is
2707 closed very soon after it is established. The problem was simply in the
2708 order in which certain operations were done, causing Exim to try to write
2709 to the SMTP stream before it had set up the file descriptor. The bug has
2710 been fixed by making things happen in the correct order.
2716 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2717 before the connection was closed, thus losing the rejection response.
2719 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2720 some early Solaris releases, but causes trouble in current releases where
2721 socklen_t is defined.
2723 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2726 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2729 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2730 that releasing the top of it at the end releases what was used for sub-
2731 expansions (unless the block got too big). However, discard this block if
2732 the first thing is a variable or header, so that we can use its block when
2733 it is dynamic (useful for very large $message_headers, for example).
2735 6. Lookups now cache *every* query, not just the most recent. A new, separate
2736 store pool is used for this. It can be recovered when all lookup caches are
2737 flushed. Lookups now release memory at the end of their result strings.
2738 This has involved some general refactoring of the lookup sources.
2740 7. Some code has been added to the store_xxx() functions to reduce the amount
2741 of flapping under certain conditions.
2743 8. log_incoming_interface used to affect only the <= reception log lines. Now
2744 it causes the local interface and port to be added to several more SMTP log
2745 lines, for example "SMTP connection from", and rejection lines.
2747 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2749 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2751 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2752 could be overwritten at the end of the current message (or the start of a
2753 new message if it was set in a HELO ACL). The value is now preserved for
2754 the duration of the SMTP connection.
2756 12. If a transport had a headers_rewrite setting, and a matching header line
2757 contained an unqualified address, that address was qualified, even if it
2758 did not match any rewriting rules. The underlying bug was that the values
2759 of the flags that permit the existence of unqualified sender and recipient
2760 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2761 non-local messages, and by -bnq for local messages) were not being
2762 preserved with the message after it was received.
2764 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2765 "next input=" as part of the text comprising the host identity instead of
2766 the correct text. The code was using the same buffer for two different
2767 strings. However, depending on which order the printing function evaluated
2768 its arguments, the bug did not always show up. Under Linux, for example, my
2769 test suite worked just fine.
2771 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2772 doesn't work with some older versions of Perl. It has been changed to "my",
2773 which in any case is probably the better facility to use.
2775 15. A really picky compiler found some instances of statements for creating
2776 error messages that either had too many or two few arguments for the format
2779 16. The size of the buffer for calls to the DNS resolver has been increased
2780 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2781 for addresses that have a lot of PTR records. This alleviates a problem; it
2782 does not fully solve it.
2784 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2785 buffer now truncates the list and logs the incident, which is the same
2786 action as happens when Exim is looking up a host name and its aliases.
2787 Previously in this situation something unpredictable would happen;
2788 sometimes it was "internal error: store_reset failed".
2790 18. If a server dropped the connection unexpectedly when an Exim client was
2791 using GnuTLS and trying to read a response, the client delivery process
2792 crashed while trying to generate an error log message.
2794 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2795 string, for example:
2797 warn message = H1: something\nH2: something
2799 the text was added as a single header line from Exim's point of view
2800 though it ended up OK in the delivered message. However, searching for the
2801 second and subsequent header lines using $h_h2: did not work. This has been
2802 fixed. Similarly, if a system filter added multiple headers in this way,
2803 the routers could not see them.
2805 20. Expanded the error message when iplsearch is called with an invalid key to
2806 suggest using net-iplsearch in a host list.
2808 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2809 ACLs are no longer actually imposed (and a message to that effect is
2812 22. If a "gecos" field in a passwd entry contained escaped characters, in
2813 particular, if it contained a \" sequence, Exim got it wrong when building
2814 a From: or a Sender: header from that name. A second bug also caused
2815 incorrect handling when an unquoted " was present following a character
2816 that needed quoting.
2818 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2819 was not being matched caselessly.
2821 24. Arranged for all hyphens in the exim.8 source to be escaped with
2824 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2825 properly. Recipient callout cache records were still being keyed to include
2826 the sender, even when use_sender was set false. This led to far more
2827 callouts that were necessary. The sender is no longer included in the key
2828 when use_sender is false.
2830 26. Added "control = submission" modifier to ACLs.
2832 27. Added the ${base62d: operator to decode base 62 numbers.
2834 28. dnsdb lookups can now access SRV records.
2836 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2837 the configuration file.
2839 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2840 (-v) mode. This makes the output for a verbose queue run more intelligible.
2842 31. Added a use_postmaster feature to recipient callouts.
2844 32. Added the $body_zerocount variable, containing the number of binary zero
2845 bytes in the message body.
2847 33. The time of last modification of the "new" subdirectory is now used as the
2848 "mailbox time last read" when there is a quota error for a maildir
2851 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2853 35. Added +ignore_unknown as a special item in host lists.
2855 36. Code for decoding IPv6 addresses in host lists is now included, even if
2856 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2857 address was recognized as an IP address, but was then not correctly decoded
2858 into binary, causing unexpected and incorrect effects when compared with
2865 1. Very minor rewording of debugging text in manualroute to say "list of
2866 hosts" instead of "hostlist".
2868 2. If verify=header_syntax was set, and a header line with an unqualified
2869 address (no domain) and a large number of spaces between the end of the
2870 name and the colon was received, the reception process suffered a buffer
2871 overflow, and (when I tested it) crashed. This was caused by some obsolete
2872 code that should have been removed. The fix is to remove it!
2874 3. When running in the test harness, delay a bit after writing a bounce
2875 message to get a bit more predictability in the log output.
2877 4. Added a call to search_tidyup() just before forking a reception process. In
2878 theory, someone could use a lookup in the expansion of smtp_accept_max_
2879 per_host which, without the tidyup, could leave open a database connection.
2881 5. Added the variables $recipient_data and $sender_data which get set from a
2882 lookup success in an ACL "recipients" or "senders" condition, or a router
2883 "senders" option, similar to $domain_data and $local_part_data.
2885 6. Moved the writing of debug_print from before to after the "senders" test
2888 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2889 problems for message scanning, either using a data ACL, or using
2890 local_scan() because the Received: header was not generated till after they
2891 were called (in order to set the time as the time of reception completion).
2892 I have revised the way this works. The header is now generated after the
2893 body is received, but before the ACL or local_scan() are called. After they
2894 are run, the timestamp in the header is updated.
2900 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2901 before starting a queue runner without re-exec. This happened only when
2902 deliver_drop_privilege was set or when the Exim user was set to root. The
2903 effect of the bug was that timeouts during subsequent deliveries caused
2904 crashes instead of being properly handled. The handler is now left at its
2905 default (and expected) setting.
2907 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2908 message, again when deliver_drop_privilege is set or Exim is run as root.
2909 The bug described in (1) was not present in this case, but the tidying up
2910 of the other signals was missing. I have made the two cases consistent.
2912 3. The ignore_target_hosts setting on a manualroute router was being ignored
2913 for hosts that were looked up using the /MX notation.
2915 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2918 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2919 operated on the sender address. After changing the $sender_address to <>
2920 for the sender address verify, Exim was re-instated it as the original
2921 (before rewriting) address, but remembering that it had rewritten it, so it
2922 wasn't rewriting it again. This bug also had the effect of breaking the
2923 sender address verification caching when the sender address was rewritten.
2925 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2926 This has been changed so that if the ip literal address matches
2927 ignore_target_hosts, the router declines.
2929 7. Added expansion conditions match_domain, match_address, and match_local_
2930 part (NOT match_host).
2932 8. The placeholder for the Received: header didn't have a length field set.
2934 9. Added code to Exim itself and to exim_lock to test for a specific race
2935 condition that could lead to file corruption when using MBX delivery. The
2936 issue is with the lockfile that is created in /tmp. If this file is removed
2937 after a process has opened it but before that process has acquired a lock,
2938 there is the potential for a second process to recreate the file and also
2939 acquire a lock. This could lead to two Exim processes writing to the file
2940 at the same time. The added code performs the same test as UW imapd; it
2941 checks after acquiring the lock that its file descriptor still refers to
2942 the same named file.
2944 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2945 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2948 11. Added the smtp_active_hostname option. If used, this will typically be made
2949 to depend on the incoming interface address. Because $interface_address is
2950 not set up until the daemon has forked a reception process, error responses
2951 that can happen earlier (such as "too many connections") no longer contain
2954 12. If an expansion in a condition on a "warn" statement fails because a lookup
2955 defers, the "warn" statement is abandoned, and the next ACL statement is
2956 processed. Previously this caused the whole ACL to be aborted.
2958 13. Added the iplsearch lookup type.
2960 14. Added ident_timeout as a log selector.
2962 15. Added tls_certificate_verified as a log selector.
2964 16. Added a global option tls_require_ciphers (compare the smtp transport
2965 option of the same name). This controls incoming TLS connections.
2967 17. I finally figured out how to make tls_require_ciphers do a similar thing
2968 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2969 before starting the TLS session.
2971 18. Tabs are now shown as \t in -bP output.
2973 19. If the log selector return_path_on_delivery was set, Exim crashed when
2974 bouncing a message because it had too many Received: header lines.
2976 20. If two routers both had headers_remove settings, and the first one included
2977 a superfluous trailing colon, the final name in the first list and the
2978 first name in the second list were incorrectly joined into one item (with a
2979 colon in the middle).
2985 1. Added -C and -D options to the exinext utility, mainly to make it easier
2986 to include in the automated testing, but these could be helpful when
2987 multiple configurations are in use.
2989 2. The exinext utility was not formatting the output nicely when there was
2990 an alternate port involved in the retry record key, nor when there was a
2991 message id as well (for retries that were specific to a specific message
2992 and a specific host). It was also confused by IPv6 addresses, because of
2993 the additional colons they contain. I have fixed the IPv4 problem, and
2994 patched it up to do a reasonable job for IPv6.
2996 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2997 delivery, the log line now contains "pipelined" if PIPELINING was used.
2999 4. An SMTP transport process used to panic and die if the bind() call to set
3000 an explicit outgoing interface failed. This has been changed; it is now
3001 treated in the same way as a connect() failure.
3003 5. A reference to $sender_host_name in the part of a conditional expansion
3004 that was being skipped was still causing a DNS lookup. This no longer
3007 6. The def: expansion condition was not recognizing references to header lines
3008 that used bh_ and bheader_.
3010 7. Added the _cache feature to named lists.
3012 8. The code for checking quota_filecount in the appendfile transport was
3013 allowing one more file than it should have been.
3015 9. For compatibility with Sendmail, the command line option
3023 and sets the incoming protocol and host name (for trusted callers). The
3024 host name and its colon can be omitted when only the protocol is to be set.
3025 Note the Exim already has two private options, -pd and -ps, that refer to
3026 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3027 "s", but I don't think that's a major issue.
3029 10. A number of refactoring changes to the code, none of which should affect
3032 (a) The number of logging options was getting close to filling up the
3033 32-bit word that was used as a bit map. I have split them into two classes:
3034 those that are passed in the argument to log_write(), and those that are
3035 only ever tested independently outside of that function. These are now in
3036 separate 32-bit words, so there is plenty of room for expansion again.
3037 There is no change in the user interface or the logging behaviour.
3039 (b) When building, for example, log lines, the code previously used a
3040 macro that called string_cat() twice, in order to add two strings. This is
3041 not really sufficiently general. Furthermore, there was one instance where
3042 it was actually wrong because one of the argument was used twice, and in
3043 one call a function was used. (As it happened, calling the function twice
3044 did not affect the overall behaviour.) The macro has been replaced by a
3045 function that can join an arbitrary number of extra strings onto a growing
3048 (c) The code for expansion conditions now uses a table and a binary chop
3049 instead of a serial search (which was left over from when there were very
3050 few conditions). Also, it now recognizes conditions like "pam" even when
3051 the relevant support is not compiled in: a suitably worded error message is
3052 given if an attempt is made to use such a condition.
3054 11. Added ${time_interval:xxxxx}.
3056 12. A bug was causing one of the ddress fields not to be passed back correctly
3057 from remote delivery subprocesses. The field in question was not being
3058 subsequently used, so this caused to problems in practice.
3060 13. Added new log selectors queue_time and deliver_time.
3062 14. Might have fixed a bug in maildirsizefile handling that threw up
3063 "unexpected character" debug warnings, and recalculated the data
3064 unnecessarily. In any case, I expanded the warning message to give more
3067 15. Added the message "Restricted characters in address" to the statements in
3068 the default ACL that block characters like @ and % in local parts.
3070 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3071 Three changes have been made:
3073 (a) There was a serious bug; a negative response to MAIL caused the whole
3074 recipient domain to be cached as invalid, thereby blocking all messages
3075 to all local parts at the same domain, from all senders. This bug has
3076 been fixed. The domain is no longer cached after a negative response to
3077 MAIL if the sender used is not empty.
3079 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3082 (c) A new callout option, "use_sender" has been added for people who want
3083 the modified behaviour.
3089 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3092 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3093 indeed breaks things for older releases.
3095 3. Added additional logging to the case where there is a problem reading data
3096 from a filter that is running in a subprocess using a pipe, in order to
3097 try to track down a specific problem.
3099 4. Testing facility fudge: when running in the test harness and attempting
3100 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3101 getting "No route to host". Convert this to a timeout.
3103 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3106 6. Some OS don't have socklen_t but use size_t instead. This affects the
3107 fifth argument of getsockopt() amongst other things. This is now
3108 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3109 can be set for individual OS. I have set it for SunOS5, OSF1, and
3110 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3111 some earlier ones do not.
3113 7. Change 4.30/15 was not doing the test caselessly.
3115 8. The standard form for an IPv6 address literal was being rejected by address
3116 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3117 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3118 this, as well as the form without the "IPv6" on the front (but only when
3119 address literals are enabled, of course).
3121 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3123 10. Exim crashed if a message with an empty sender address specified by -f
3124 encountered a router with an errors_to setting. This could be provoked only
3125 by a command such as
3129 where an empty string was supplied; "<>" did not hit this bug.
3131 11. Installed PCRE release 4.5.
3133 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3134 remained set. It is now erased.
3136 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3137 times from message ids (which are base 36 rather than the normal 62).
3139 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3140 were being counted as actual protocol errors, and logged if the log
3141 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3142 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3143 and DATA following a set of rejected RCPTs do not count as protocol errors.
3144 In other words, Exim assumes they were pipelined, though this may not
3145 actually be the case. Of course, in all cases the client gets an
3146 appropriate error code.
3148 15. If a lookup fails in an ACL condition, a message about the failure may
3149 be available; it is used if testing the ACL cannot continue, because most
3150 such messages specify what the cause of the deferral is. However, some
3151 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3152 that caused an old message to be retained and used if a later statement
3153 caused a defer, replacing the real cause of the deferral.
3155 16. If an IP address had so many PTR records that the DNS lookup buffer
3156 was not large enough to hold them, Exim could crash while trying to process
3157 the truncated data. It now detects and logs this case.
3159 17. Further to 4.21/58, another change has been made: if (and only if) the
3160 first line of a message (the first header line) ends with CRLF, a bare LF
3161 in a subsequent header line has a space inserted after it, so as not to
3162 terminate the header.
3164 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3165 unnecessarily, used atoi() instead of strtol(), and didn't check the
3166 termination when getting file sizes from file names by regex.
3168 19. Completely re-implemented the support for maildirsize files, in the light
3169 of a number of problems with the previous contributed implementation
3170 (4.30/29). In particular:
3172 . If the quota is zero, the maildirsize file is maintained, but no quota is
3175 . If the maildir directory does not exist, it is created before any attempt
3176 to write a maildirsize file.
3178 . The quota value in the file is just a cache; if the quota is changed in
3179 the transport, the new value overrides.
3181 . A regular expression is available for excluding directories from the
3184 20. The autoreply transport checks the characters in options that define the
3185 message's headers; it allows continued headers, but it was checking with
3186 isspace() after an embedded newline instead of explicitly looking for a
3189 21. If all the "regular" hosts to which an address was routed had passed their
3190 expiry times, and had not reached their retry times, the address was
3191 bounced, even if fallback hosts were defined. Now Exim should go on to try
3194 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3195 equivalent code in the SMTP transport. Some hosts send humungous responses
3196 to HELO/EHLO, more than 1024 it seems.
3198 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3199 gives compiler warnings in some environments. I've now done it "properly",
3202 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3203 (because of problems with the built-in one) was declared to return uschar *
3204 instead of char *, causing compiler failure.
3206 25. Fixed a file descriptor leak when processing alias/forward files.
3208 26. Fixed a minor format string issue in dbfn.c.
3210 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3212 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3213 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3216 29. When a sender address is verified, it is cached, to save repeating the test
3217 when there is more than one recipient in a message. However, when the
3218 verification involves a callout, it is possible for different callout
3219 options to be set for different recipients. It is too complicated to keep
3220 track of this in the cache, so now Exim always runs a verification when a
3221 callout is required, relying on the callout cache for the optimization.
3222 The overhead is duplication of the address routing, but this should not be
3225 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3226 to be verified with callout=postmaster, and the main callout worked but the
3227 postmaster check failed, the verification correctly failed. However, if a
3228 subsequent RCPT command asked for sender verification *without* the
3229 postmaster check, incorrect caching caused this verification also to fail,
3232 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3233 it was not caching the DNS options (qualify_single, search_parents) that
3234 were used when the lookup failed. A subsequent lookup with different
3235 options therefore always gave the same answer, though there were cases
3236 where it should not have. (Example: a "domains = !$mx_any" option on a
3237 dnslookup router: the "domains" option is always processed without any
3238 widening, but the router might have qualify_single set.) Now Exim uses the
3239 cached value only when the same options are set.
3241 32. Added John Jetmore's "exipick" utility to the distribution.
3243 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3244 than a timeout (e.g. a certificate is required, and is not provided), an
3245 Exim server now closes the connection immediately. Previously it waited for
3246 the client to close - but if the client is SSL, it seems that they each
3247 wait for each other, leading to a delay before one of them times out.
3249 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3250 maintained 0.8.x compatibility because I don't think many are using it, and
3251 it is clearly obsolete.
3253 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3256 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3257 client certificate was expired. A simple patch fixes this, though I don't
3258 understand the full logic of why the verify callback is called multiple
3261 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3262 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3263 which causes problems with some clients (such as the Certicom SSL Plus
3264 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3265 disables the coutermeasure allowing Eudora to connect."
3267 38. Exim was not checking that a write() to a log file succeeded. This could
3268 lead to Bad Things if a log got too big, in particular if it hit a file
3269 size limit. Exim now panics and dies if it cannot write to a log file, just
3270 as it does if it cannot open a log file.
3272 39. Modified OS/Makefile-Linux so that it now contains
3274 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3276 The two -D definitions ensure that Exim is compiled with large file
3277 support, which makes it possible to handle log files that are bigger than
3280 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3281 instance) a domain was checked against a named list that involved a lookup,
3282 causing $domain_data to be set, then another domain was checked against the
3283 same list, then the first domain was re-checked, the value of $domain_data
3284 after the final check could be wrong. In particular, if the second check
3285 failed, it could be set empty. This bug probably also applied to
3288 41. The strip_trailing_dot option was not being applied to the address given
3289 with the -f command-line option.
3291 42. The code for reading a message's header from the spool was incrementing
3292 $received_count, but never initializing it. This meant that the value was
3293 incorrect (doubled) while delivering a message in the same process in which
3294 it was received. In the most common configuration of Exim, this never
3295 happens - a fresh exec is done - but it can happen when
3296 deliver_drop_privilege is set.
3298 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3299 it now includes up to 150 characters of the unexpected data in the log
3302 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3303 and building data strings. The size of both of these buffers was 10 000
3304 bytes - far larger than anybody would *ever* want, thought I. Needless to
3305 say, somebody hit the limit. I have increased the maximum line length to
3306 20 000 and the maximum data length of concatenated lines to 100 000. I have
3307 also fixed two bugs, because there was no checking on these buffers. Tsk,
3308 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3309 buffer is too small.
3311 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3312 lsearch lookups. Now it does.
3314 46. When parsing a route_list item in a manualroute router, a fixed-length
3315 buffer was used for the list of hosts. I made this 1024 bytes long,
3316 thinking that nobody would ever have a list of hosts that long. Wrong.
3317 Somebody had a whole pile of complicated expansion conditions, and the
3318 string was silently truncated, leading to an expansion error. It turns out
3319 that it is easier to change to an unlimited length (owing to other changes
3320 that have happened since this code was originally written) than to build
3321 structure for giving a limitation error. The length of the item that
3322 expands into the list of hosts is now unlimited.
3324 47. The lsearch lookup could not handle data where the length of text line was
3325 more than 4095 characters. Such lines were truncated, leading to shortened
3326 data being returned. It should now handle lines of any length.
3328 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3329 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3332 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3333 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3334 no longer happens in comment lines. A list of replacements is now placed
3335 at the head of all of the source files, except those whose only change is
3336 to replace PERL_COMMAND in the very first #! line.
3338 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3339 messages on the queue, with a bottom-up merge sort, using code contributed
3340 by Michael Haardt. This should make operations like -bp somewhat faster on
3341 large queues. It won't affect queue runners, except when queue_run_in_order
3344 51. Installed eximstats 1.31 in the distribution.
3346 52. Added support for SRV lookups to the dnslookup router.
3348 53. If an ACL referred to $message_body or $message_body_end, the value was not
3349 reset for any messages that followed in the same SMTP session.
3351 54. The store-handling optimization for building very long strings was not
3352 differentiating between the different store pools. I don't think this
3353 actually made any difference in practice, but I've tidied it.
3355 55. While running the routers to verify a sender address, $sender_address
3356 was still set to the sender address. This is wrong, because when routing to
3357 send a bounce to the sender, it would be empty. Therefore, I have changed
3358 it so that, while verifying a sender address, $sender_address is set to <>.
3359 (There is no change to what happens when verifying a recipient address.)
3361 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3362 target A or AAAA records (if not already returned) without resetting the
3363 qualify_single or search_parents options of the DNS resolver. These are
3364 inappropriate in this case because the targets of MX and SRV records must
3365 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3366 target that, when qualified, matched something in the local domain. These
3367 two options are now turned off when doing these lookups.
3369 57. It seems that at least some releases of Reiserfs (which does not have the
3370 concept of a fixed number of inodes) returns zero and not -1 for the
3371 number of available inodes. This interacted badly with check_spool_inodes,
3372 which assumed that -1 was the "no such thing" setting. What I have done is
3373 to check that the total number of inodes is greater than zero before doing
3374 the test of how many are available.
3376 58. When a "warn" ACL statement has a log_message modifier, the message is
3377 remembered, and not repeated. This is to avoid a lot of repetition when a
3378 message has many recipients that cause the same warning to be written.
3379 Howewer, Exim was preserving the list of already written lines for an
3380 entire SMTP session, which doesn't seem right. The memory is now reset if a
3381 new message is started.
3383 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3384 debugging output unless log_rewrite was also set.
3386 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3387 of (int)(handle) when we know that handle contains (void *)(-1).
3389 61. The Exim daemon panic-logs an error return when it closes the incoming
3390 connection. However "connection reset by peer" seems to be common, and
3391 isn't really an error worthy of noting specially, so that particular error
3394 62. When Exim is trying to find all the local interfaces, it used to panic and
3395 die if the ioctl to get the interface flags failed. However, it seems that
3396 on at least one OS (Solaris 9) it is possible to have an interface that is
3397 included in the list of interfaces, but for which you get a failure error
3398 for this call. This happens when the interface is not "plumbed" into a
3399 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3400 failure of the "get flags" call assumes that the interface is down.
3402 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3403 makes life easier for people who are doing arithmetic on fields extracted
3404 from dates, where you often get leading zeros that should not be
3405 interpreted as octal.
3407 64. Added qualify_domain to the redirect router, to override the global
3410 65. If a pathologically long header line contained very many addresses (the
3411 report of this problem mentioned 10 000) and each of them was rewritten,
3412 Exim could use up a very large amount of memory. (It kept on making new
3413 copies of the header line as it rewrote, and never released the old ones.)
3414 At the expense of a bit more processing, the header rewriting function has
3415 been changed so that it no longer eats memory in this way.
3417 66. The generation of the Received: header has been moved from the time that a
3418 message starts to be received, to the time that it finishes. The timestamp
3419 in the Received: header should now be very close to that of the <= log
3420 line. There are two side-effects of this change:
3422 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3423 logged header lines no longer include the local Received: line, because
3424 it has not yet been created. The same applies to a copy of the message
3425 that is returned to a non-SMTP sender when a message is rejected.
3427 (b) When a filter file is tested using -bf, no additional Received: header
3428 is added to the test message. After some thought, I decided that this
3431 This change does not affect the value of $received_for. It is still set
3432 after address rewriting, but before local_scan() is called.
3434 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3436 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3437 gave an unhelpful panic error message, and a defer error. I have managed to
3438 change this behaviour so that it now rejects any supplied certificate,
3439 which seems right, as the list of acceptable certificates is empty.
3441 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3442 gave an unhelpful defer error. I have not managed to make this reject any
3443 supplied certificates, but the error message it gives is "no certificate
3444 supplied", which is not helpful.
3446 70. exigrep's output now also includes lines that are not associated with any
3447 message, but which match the given pattern. Implemented by a patch from
3448 Martin Sluka, which also tidied up the Perl a bit.
3450 71. Recipient callout verification, like sender verification, was using <> in
3451 the MAIL FROM command. This isn't really the right thing, since the actual
3452 sender may affect whether the remote host accepts the recipient or not. I
3453 have changed it to use the actual sender in the callout; this means that
3454 the cache record is now keyed on a recipient/sender pair, not just the
3455 recipient address. There doesn't seem to be a real danger of callout loops,
3456 since a callout by the remote host to check the sender would use <>.
3457 [SEE ABOVE: changed after hitting problems.]
3459 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3460 temporary errors. However, in the case of such a code being given after
3461 the end of a data transmission (i.e. after ".") Exim was failing to write
3462 a retry record for the message. (Yes, there was some broken host that was
3463 actually sending 8xx at this point.)
3465 73. An unknown lookup type in a host list could cause Exim to panic-die when
3466 the list was checked. (An example that provoked this was putting <; in the
3467 middle of a list instead of at the start.) If this happened during a DATA
3468 ACL check, a -D file could be left lying around. This kind of configuration
3469 error no longer causes Exim to die; instead it causes a defer errror. The
3470 incident is still logged to the main and panic logs.
3472 74. Buglet left over from Exim 3 conversion. The message "too many messages
3473 in one connection" was written to the rejectlog but not the mainlog, except
3474 when address rewriting (yes!) was being logged.
3476 75. Added write_rejectlog option.
3478 76. When a system filter was run not as root (that is, when system_filter_user
3479 was set), the values of the $n variables were not being returned to the
3480 main process; thus, they were not subsequently available in the $sn
3483 77. Added +return_path_on_delivery log selector.
3485 78. A connection timeout was being treated differently from recipients deferred
3486 when testing hosts_max_try with a message that was older than the host's
3487 retry timeout. (The host should not be counted, thus allowing all hosts to
3488 be tried at least once before bouncing.) This may have been the cause of an
3489 occasionally reported bug whereby a message would remain on the queue
3490 longer than the retry timeout, but would be bounced if a delivery was
3491 forced. I say "may" because I never totally pinned down the problem;
3492 setting up timeout/retry tests is difficult. See also the next item.
3494 79. The ultimate address timeout was not being applied to errors that involved
3495 a combination of host plus message (for example, a timeout on a MAIL
3496 command). When an address resolved to a number of possible hosts, and they
3497 were not all tried for each delivery (e.g. because of hosts_max_try), a
3498 message could remain on the queue longer than the retry timeout.
3500 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3503 81. Fixed an obscure SMTP outgoing bug which required at least the following
3504 conditions: (a) there was another message waiting for the same server;
3505 (b) the server returned 5xx to all RCPT commands in the first message so
3506 that the message was not completed; (c) the server dropped the connection
3507 or gave a negative response to the RSET that Exim sends to abort the
3508 transaction. The observed case was a dropped connection after DATA that had
3509 been sent in pipelining mode. That is, the server had advertised PIPELINING
3510 but was not implementing it correctly. The effect of the bug was incorrect
3511 behaviour, such as trying another host, and this could lead to a crash.
3517 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3518 and daemon.c were passed as pointers to ints; they should have been
3519 pointers to socklen_t variables (which are typically unsigned ints).
3521 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3524 3. Fixed a really odd bug that affected only the testing scheme; patching a
3525 certain fixed string in the binary changed the value of another string that
3526 happened to be identical to the end of the original first string.
3528 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3529 name", it returns that address as the IP address. On some operating
3530 systems (e.g. Solaris), it also passes back the IP address string as the
3531 "host name". However, on others (e.g. Linux), it passes back an empty
3532 string. Exim wasn't checking for this, and was changing the host name to an
3533 empty string, assuming it had been canonicized.
3535 5. Although rare, it is permitted to have more than one PTR record for a given
3536 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3537 all the names associated with an address, because they do in Solaris.
3538 However, it seems that they do not in Linux for data that comes from the
3539 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3540 I found this out when I moved to a new Linux workstation and tried to run
3541 the Exim test suite.
3543 To get round this problem I have changed the code so that it now does its
3544 own call to the DNS to look up PTR records when searching for a host name.
3545 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3546 addresses that are only in /etc/hosts are still found.
3548 This behaviour is, however, controlled by an option called host_lookup_
3549 order, which defaults to "bydns:byaddr". If people want to use the other
3550 order, or indeed, just use one or the other means of lookup, they can
3551 specify it in this variable.
3553 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3554 some operating systems, this comes back from gethostbyaddr() as an empty
3555 string, and this is what Exim used to test for. However, it seems that in
3556 other systems, "." is yielded. Exim now tests for this case too.
3558 7. The values of check_spool_space and check_log_space are now held internally
3559 as a number of kilobytes instead of an absolute number of bytes. If a
3560 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3561 kilobyte. This means that much larger values can be stored.
3563 8. Exim monitor: an attempt to get the action menu when not actually pointing
3564 at a message produces an empty menu entitled "No message selected". This
3565 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3566 no entries in it ("Shell widget menu has zero width and/or height"). So I
3567 have added a single, blank menu entry in this case.
3569 9. Added ${quote_local_part.
3571 10. MIME decoding is now applied to the contents of Subject: header lines when
3574 11. Now that a reference to $sender_host_address automatically causes a reverse
3575 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3576 host lookup before query-style lookups in lists that might use this
3577 variable. This has therefore been abolished, and the "net-" prefix is no
3578 longer necessary for query-style lookups.
3580 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3581 have been a typo for LFLAGS, so it has been changed.
3583 13. The install script calls Exim with "-C /dev/null" in order to find the
3584 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3585 to be output. Howeve, since Exim outputs its version number before the
3586 error, it didn't break the script. It just looked ugly. I fixed this by
3587 always allowing "-C /dev/null" if the caller is root.
3589 14. Ignore overlarge ACL variable number when reading spool file - insurance
3590 against a later release with more variables having written the file.
3592 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3593 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3594 this, as well as the form without the "IPv6" on the front.
3596 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3597 OS/Makefile-Darwin file.
3599 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3600 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3602 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3603 variable. However, some OS use ints for inodes. I've added cast to long int
3604 to get rid of the compiler warning.
3606 19. I had forgotten to lock out "/../" in configuration file names when
3607 ALT_CONFIG_PREFIX was set.
3609 20. Routers used for verification do not need to specify transports. However,
3610 if such a router generated a host list, and callout was configured, Exim
3611 crashed, because it could not find a port number from the (non-existent)
3612 transport. It now assumes port 25 in this circumstance.
3614 21. Added the -t option to exigrep.
3616 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3617 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3618 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3619 them is set, LOOKUP_LSEARCH is forced.
3621 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3623 24. Added sender and host information to the "rejected by local_scan()" log
3624 line; previously there was no indication of these.
3626 25. Added .include_if_exists.
3628 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3629 Linux. It turns out that not all file systems support this. Apparently some
3630 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3631 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3632 not supported on the file descriptor, is now ignored when Exim is trying to
3633 sync a directory. This applies only to Linux.
3635 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3637 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3638 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3641 29. Added support for maildirsize files from supplied patch (modified a bit).
3643 30. The use of :fail: followed by an empty string could lead Exim to respond to
3644 sender verification failures with (e.g.):
3646 550 Verification failed for <xxx>
3647 550 Sender verify failed
3649 where the first response line was missing the '-' that indicates it is not
3650 the final line of the response.
3652 31. The loop for finding the name of the user that called Exim had a hardwired
3653 limit of 10; it now uses the value of finduser_retries, which is used for
3654 all other user lookups.
3656 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3659 33. Exim was neglecting to zero errno before one call of strtol() when
3660 expanding a string and expecting an integer value. On some systems this
3661 resulted in spurious "integer overflow" errors. Also, it was casting the
3662 result into an int without checking.
3664 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3665 did not work. The code looks as if it has *never* worked, though it appears
3666 to have been documented since at least releast 1.62. I have made it work.
3668 35. The "timeout_DNS" error in retry rules, also documented since at least
3669 1.62, also never worked. As it isn't clear exactly what this means, and
3670 clearly it isn't a major issue, I have abolished the feature by treating it
3671 as "timeout", and writing a warning to the main and panic logs.
3673 36. The display of retry rules for -brt wasn't always showing the error code
3676 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3677 timeout_connect_A, timeout_connect_MX.
3679 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3680 to the empty sender.
3682 39. The daemon was not analysing the content of -oX till after it had closed
3683 stderr and disconnected from the controlling terminal. This meant that any
3684 syntax errors were only noted on the panic log, and the return code from
3685 the command was 0. By re-arranging the code a little, I've made the
3686 decoding happen first, so such errors now appear on stderr, and the return
3687 code is 1. However, the actual setting up of the sockets still happens in
3688 the disconnected process, so errors there are still only recorded on the
3691 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3692 connections (as happens on some IP stacks) was logged at start up time as
3693 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3694 it from "IPv6 and IPv4", which means that two separate sockets are being
3697 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3698 says whether AF_INET or AF_INET6 was passed as an argument.
3700 42. Exiwhat output was messed up when time zones were included in log
3703 43. Exiwhat now gives more information about the daemon's listening ports,
3704 and whether -tls-on-connect was used.
3706 44. The "port" option of the smtp transport is now expanded.
3708 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3709 silently ignored. Now an error message is written to the main and panic
3712 46. There's a new ACL modifier called "logwrite" which writes to a log file
3713 as soon as it is encountered.
3715 47. Added $local_user_uid and $local_user_gid at routing time.
3717 48. Exim crashed when trying to verify a sender address that was being
3720 49. Exim was recognizing only a space character after ".include". It now also
3721 recognizes a tab character.
3723 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3724 extracting the relevant information from the specification. The man page no
3725 longer contains scrambled data for the -d option, and I've added a section
3726 at the front about calling Exim under different names.
3728 51. Added "extra_headers" argument to the "mail" command in filter files.
3730 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3733 53. Installed eximstats 1.29.
3735 54. Added transport_filter_timeout as a generic transport option.
3737 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3738 Cc: header lines. This was required by RFC 822, but it not required by RFC
3741 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3742 incoming messages that did not have them. Now it does so only if the
3743 message originates locally, that is, if there is no associated remote host
3744 address. When Resent- header lines are present, this applies to the Resent-
3745 lines rather than the non-Resent- lines.
3747 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3748 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3750 58. Messages for configuration errors now include the name of the main
3751 configuration file - useful now that there may be more than one file in a
3752 list (.included file names were always shown).
3754 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3755 for those rare installations that do not start the daemon as root or run it
3756 setuid root. I've cut out the call to initgroups() if the daemon is not
3759 60. The Exim user and group can now be bound into the binary as text strings
3760 that are looked up at the start of Exim's processing.
3762 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3764 62. Added $mailstore_basename variable.
3766 63. Installed patch to sieve.c from Michael Haardt.
3768 64. When Exim failed to open the panic log after failing to open the main log,
3769 the original message it was trying to log was written to stderr and debug
3770 output, but if they were not available (the usual case in production), it
3771 was lost. Now it is written to syslog before the two lines that record the
3772 failures to open the logs.
3774 65. Users' Exim filters run in subprocesses under the user's uid. It is
3775 possible for a "deliver" command or an alias in a "personal" command to
3776 provoke an address rewrite. If logging of address rewriting is configured,
3777 this fails because the process is not running as root or exim. There may be
3778 a better way of dealing with this, but for the moment (because 4.30 needs
3779 to be released), I have disabled address rewrite logging when running a
3780 filter in a non-root, non-exim process.
3786 1. The buildconfig auxiliary program wasn't quoting the value set for
3787 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3788 not defined. This bug was masked in 4.22 by the effect that was fixed in
3791 2. Some messages that were rejected after a message id was allocated were
3792 shown as "incomplete" by exigrep. It no longer does this for messages that
3793 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3795 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3796 have allow_domain_literals set, the ID did not get logged in the <= line.
3797 Domain literals are now always recognized in Message-ID: header lines.
3799 4. The first argument for a ${extract expansion item is the key name or field
3800 number. Leading and trailing spaces in this item were not being ignored,
3801 causing some misleading effects.
3803 5. When deliver_drop_privilege was set, single queue runner processes started
3804 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3805 same command in the process it spins off) were not dropping privilege.
3807 6. When the daemon running as "exim" started a queue runner, it always
3808 re-executed Exim in the spun-off process. This is a waste of effort when
3809 deliver_drop_privilege is set. The new process now just calls the
3810 queue-runner function directly.
3816 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3819 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3820 ignored. Though the use of -oP was forcing the writing of a pid file, it
3821 was always written to the default place.
3823 3. If the message "no IP address found for host xxxx" is generated during
3824 incoming verification, it is now followed by identification of the incoming
3825 connection (so you can more easily find what provoked it).
3827 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3829 5. Added some features to "harden" Exim a bit more against certain attacks:
3831 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3832 be put in Local/Makefile. This is like the never_users runtime option,
3833 but it cannot be overridden. The default setting is "root".
3835 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3836 prefix string with which any file named in a -C command line option
3839 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3840 is retained for -C and -D only if the caller of Exim is root. Without
3841 it, the exim user may also use -C and -D and retain privilege.
3843 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3844 command line option is disabled.
3846 6. Macro names set by the -D option must start with an upper case letter, just
3847 like macro names defined in the configuration file.
3849 7. Added "dereference=" facility to LDAP.
3851 8. Two instances of the typo "uknown" in the source files are fixed.
3853 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3854 the Configure-Makefile script screwed up while processing it.
3856 10. Incorporated PCRE 4.4.
3858 11. The SMTP synchronization check was not operating right at the start of an
3859 SMTP session. For example, it could not catch a HELO sent before the client
3860 waited for the greeting. There is now a check for outstanding input at the
3861 point when the greeting is written. Because of the duplex, asynchronous
3862 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3863 way, but not yet received, when the check is performed.
3865 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3866 on TCP/IP sockets, because this apparently causes some broken clients to
3869 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3870 unchanged) from the Cygwin maintainer.
3872 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3873 was supported instead of testing for mbx. Effectively a typo.
3875 15. The spa authenticator server code was not checking that the input it
3876 received was valid base64.
3878 16. The debug output line for the "set" modifier in ACLs was not showing the
3879 name of the variable that was being set.
3881 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3883 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3884 lookup on its own. Something else was needed to trigger the lookup. For
3885 example, a match in host_lookup or the need for a host name in a host list.
3886 Now, if $sender_host_name is referenced and the host name has not yet been
3887 looked up, a lookup is performed. If the lookup fails, the variable remains
3888 empty, and $host_lookup_failed is set to "1".
3890 19. Added "eqi" as a case-independent comparison operator.
3892 20. The saslauthd authentication condition could segfault if neither service
3893 nor realm was specified.
3895 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3896 error message that was logged was misleading, and incoming SMTP
3897 connections were dropped. The message is now more accurate, and temporary
3898 errors are given to SMTP connections.
3900 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3901 (except RSET) with a 421 error, until QUIT is received. However, it was
3902 failing to send a response to QUIT.
3904 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3905 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3906 ACL is now run after the helo_try_verify_hosts code.
3908 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3909 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3910 case-independent, so other case variants are also recognized). Apparently
3911 some systems use these upper case variants.
3913 25. If more than two messages were waiting for the same host, and a transport
3914 filter was specified for the transport, Exim sent two messages over the
3915 same TCP/IP connection, and then failed with "socket operation on non-
3916 socket" when it tried to send the third.
3918 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3920 27. The extern definition of crypt16() in expand.c was not being excluded when
3921 the OS had its own crypt16() function.
3923 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3924 as a preferred synonym for return_size_limit, both as an option and as an
3927 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3929 30. Changed the default configuration ACL to relax the local part checking rule
3930 for addresses that are not in any local domains. For these addresses,
3931 slashes and pipe symbols are allowed within local parts, but the sequence
3932 /../ is explicitly forbidden.
3934 31. SPA server authentication was not clearing the challenge buffer before
3937 32. log_message in a "warn" ACL statement was writing to the reject log as
3938 well as to the main log, which contradicts the documentation and doesn't
3939 seem right (because no rejection is happening). So I have stopped it.
3941 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3942 However, I am unable to do any testing of this.
3944 34. Fixed an infelicity in the appendfile transport. When checking directories
3945 for a mailbox, to see if any needed to be created, it was accidentally
3946 using path names with one or more superfluous leading slashes; tracing
3947 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3949 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3950 contents are added to the log line that is written for every discarded
3951 recipient. (Previously a log_message setting was ignored.)
3953 36. The ${quote: operator now quotes the string if it is empty.
3955 37. The install script runs exim in order to find its version number. If for
3956 some reason other than non-existence or emptiness, which it checks, it
3957 could not run './exim', it was installing it with an empty version number,
3958 i.e. as "exim-". This error state is now caught, and the installation is
3961 38. An argument was missing from the function that creates an error message
3962 when Exim fails to connect to the socket for saslauthd authentication.
3963 This could cause Exim to crash, or give a corrupted message.
3965 39. Added isip, isip4, and isip6 to ${if conditions.
3967 40. The ACL variables $acl_xx are now saved with the message, and can be
3968 accessed later in routers, transports, and filters.
3970 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3971 strings in the file are not string-expanded.
3973 42. If a MAIL command specified a SIZE value that was too large to fit into an
3974 int variable, the check against message_size_limit failed. Such values are
3975 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3976 day this will have to be increased, but I don't think I want to be around
3977 when emails are that large.
3984 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3985 iconv() is not standard in FreeBSD.
3987 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3988 IPv6 enabled. The observed symptom was a segmentation fault on return from
3989 the function os_common_find_running_interfaces() in src/os.c.
3991 3. In the check_special_case() function in daemon.c I had used "errno" as an
3992 argument name, which causes warnings on some systems. This was basically a
3993 typo, since it was named "eno" in the comments!
3995 4. The code that waits for the clock to tick (at a resolution of some fraction
3996 of a second) so as to ensure message-id uniqueness was always waiting for
3997 at least one whole tick, when it could have waited for less. [This is
3998 almost certainly not relevant at current processor speeds, where it is
3999 unlikely to ever wait at all. But we try to future-proof.]
4001 5. The function that sleeps for a time interval that includes fractions of a
4002 second contained a race. It did not block SIGALRM between setting the
4003 timer, and suspending (a couple of lines later). If the interval was short
4004 and the sigsuspend() was delayed until after it had expired, the suspension
4005 never ended. On busy systems this could lead to processes getting stuck for
4008 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4009 process, before it forks any delivery processes. The open lookup caching
4010 mechanism meant that the open file or database connection was passed into
4011 the delivery process. The problem was that delivery processes always tidy
4012 up cached lookup data. This could cause a problem for the next delivery
4013 process started by the queue runner, because the external queue runner
4014 process does not know about the closure. So the next delivery process
4015 still has data in the lookup cache. In the case of a file lookup, there was
4016 no problem because closing a file descriptor in a subprocess doesn't affect
4017 the parent. However, if the lookup was caching a connection to a database,
4018 the connection was closed, and the second delivery process was likely to
4019 see errors such as "PGSQL: query failed: server closed the connection
4020 unexpectedly". The problem has been fixed by closing all cached lookups
4021 in a queue runner before running a delivery process.
4023 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4024 seem to have the "const" qualifier which it has on other OS. I've
4027 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4028 *of the same type* (client or server) with the same public name that an
4029 error should be diagnosed.
4031 9. When Exim looked up a host name for an IP address, but failed to find the
4032 original IP address when looking up the host name (a safety check), it
4033 output the message "<ip address> does not match any IP for NULL", which was
4034 confusing, to say the least. The bug was that the host name should have
4035 appeared instead of "NULL".
4037 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4038 user that is built into the binary, and the -C or -D options is used, root
4039 privilege is dropped before the configuration file is read. In addition,
4040 logging is switched to stderr instead of the normal log files. If the
4041 configuration then re-defines the Exim user, the unprivileged environment
4042 is probably not what is expected, so Exim logs a panic warning message (but
4045 However, if deliver_drop_privilege is set, the unprivileged state may well
4046 be exactly what is intended, so the warning has been cut out in that case,
4047 and Exim is allowed to try to write to its normal log files.
4053 1. smtp_return_error_details was not giving details for temporary sender
4054 or receiver verification errors.
4056 2. Diagnose a configuration error if two authenticators have the same public
4059 3. Exim used not to create the message log file for a message until the first
4060 delivery attempt. This could be confusing when incoming messages were held
4061 for policy or load reasons. The message log file is now created at the time
4062 the message is received, and an initial "Received" line is written to it.
4064 4. The automatically generated man page for command line options had a minor
4065 bug that caused no ill effects; however, a more serious problem was that
4066 the procedure for building the man page automatically didn't always
4067 operate. Consequently, release 4.20 contains an out-of-date version. This
4068 shouldn't happen again.
4070 5. When building Exim with embedded Perl support, the script that builds the
4071 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4072 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4074 6. The freeze_tell option was not being used for messages that were frozen on
4075 arrival, either by an ACL or by local_scan().
4077 7. Added the smtp_incomplete_transaction log selector.
4079 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4080 was accepting AUTH without a new EHLO.
4082 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4083 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4086 10. Logging of TCP/IP connections (when configured) now happens in the main
4087 daemon process instead of the child process, so that the TCP/IP connection
4088 count is more accurate (but it can never be perfect).
4090 11. The use of "drop" in a nested ACL was not being handled correctly in the
4091 outer ACL. Now, if condition failure induced by the nested "drop" causes
4092 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4093 or "require"), the connection is dropped.
4095 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4096 that yield "discard" can now be used with an "accept" or a "discard" verb,
4097 but an error is generated for any others (because I can't see a useful way
4098 to define what should happen).
4100 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4101 are now processed in the same way as lines in the Exim configuration file.
4102 In particular, continuation lines are supported.
4104 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4106 15. Added -ti meaning -t -i.
4108 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4109 domains, and warn by logging if others are found.
4111 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4112 returned from GIFCONF when Exim is trying to find the list of interfaces on
4113 a host. The code in os.c has been modified to copy each ifreq to an aligned
4114 structure in all cases.
4116 Also, in some cases, the returned ifreq's were being copied to a 'struct
4117 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4118 means the last couple of bytes of an IPv6 address could be chopped if the
4119 ifreq contained only a normal sockaddr (14 bytes storage).
4121 18. Named domain lists were not supported in the hosts_treat_as_local option.
4122 An entry such as +xxxx was not recognized, and was treated as a literal
4125 19. Ensure that header lines added by a DATA ACL are included in the reject log
4126 if the ACL subsequently rejects the message.
4128 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4129 MD5 (which is deprecated).
4131 21. When testing a filter file using -bf, Exim was writing a message when it
4132 took the sender from a "From " line in the message, but it was not doing so
4133 when it took $return_path from a Return-Path: header line. It now does.
4135 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4136 with a valid header line field name (a series of printing characters
4137 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4139 23. Changed "disc" in the source to "disk" to conform to the documentation and
4140 the book and for uniformity.
4142 24. Ignore Sendmail's -Ooption=value command line item.
4144 25. When execve() failed while trying to run a command in a pipe transport,
4145 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4146 could be confused with a return value of 69 from the command itself. This
4147 has been changed to 127, the value the shell returns if it is asked to run
4148 a non-existent command. The wording for the related log line suggests a
4149 non-existent command as the problem.
4151 26. If received_header_text expands to an empty string, do not add a Received:
4152 header line to the message. (Well, it adds a token one on the spool, but
4153 marks it "old" so that it doesn't get used or transmitted.)
4155 27. Installed eximstats 1.28 (addition of -nt option).
4157 28. There was no check for failure on the call to getsockname() in the daemon
4158 code. This can fail if there is a shortage of resources on the system, with
4159 ENOMEM, for example. A temporary error is now given on failure.
4161 29. Contrary to the C standard, it seems that in some environments, the
4162 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4163 program. Exim now does this explicitly; it affects the formatting of
4164 timestamps using strftime().
4166 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4167 complaints. I've now initialized all the variables, to avoid this.
4169 32. Header lines added by a system filter were not being "seen" during
4170 transport-time rewrites.
4172 33. The info_callback() function passed to OpenSSL is set up with type void
4173 (*)(SSL *, int, int), as described somewhere. However, when calling the
4174 function (actually a macro) that sets it up, the type void(*)() is
4175 expected. I've put in a cast to prevent warnings from picky compilers.
4177 34. If a DNS black list lookup found a CNAME record, but there were no A
4178 records associated with the domain it pointed at, Exim crashed.
4180 35. If a DNS black list lookup returned more than one A record, Exim ignored
4181 all but the first. It now scans all returned addresses if a particular IP
4182 value is being sought. In this situation, the contents of the
4183 $dnslist_value variable are a list of all the addresses, separated by a
4186 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4187 to accept a host name and all its aliases if the forward lookup for any of
4188 them yielded the IP address of the incoming connection. Now it accepts only
4189 those names whose forward lookup yields the correct IP address. Any other
4190 names are discarded. This closes a loophole whereby a rogue DNS
4191 administrator could create reverse DNS records to break through a
4192 wildcarded host restriction in an ACL.
4194 37. If a user filter or a system filter that ran in a subprocess used any of
4195 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4196 the wrong values were passed to the pipe command ($thisaddress had the
4197 value of $0, $0 had the value of $1, etc). This bug was introduced by
4198 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4200 38. Improved the line breaking for long SMTP error messages from ACLs.
4201 Previously, if there was no break point between 40 and 75 characters, Exim
4202 left the rest of the message alone. Two changes have been made: (a) I've
4203 reduced the minimum length to 35 characters; (b) if it can't find a break
4204 point between 35 and 75 characters, it looks ahead and uses the first one
4205 that it finds. This may give the occasional overlong line, but at least the
4206 remaining text gets split now.
4208 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4209 file descriptors might be low, and that setting 1000 would always raise it.
4210 It turns out that in some environments, the limit is already over 1000 and
4211 that lowering it causes trouble. So now Exim takes care not to decrease it.
4213 40. When delivering a message, the value of $return_path is set to $sender_
4214 address at the start of routing (routers may change the value). By an
4215 oversight, this default was not being set up when an address was tested by
4216 -bt or -bv, which affected the outcome if any router or filter referred to
4219 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4220 log only when "message" or "log_message" are set. However, if one of the
4221 conditions was an address verification, or a call to a nested ACL, the
4222 messages generated by the underlying test were being passed through. This
4223 no longer happens. The underlying message is available in $acl_verify_
4224 message for both "message" and "log_message" expansions, so it can be
4225 passed through if needed.
4227 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4228 new expansion $bh_ to give the encoded byte string without charset
4229 translation. Translation happens only if iconv() is available; HAVE_ICONV
4230 indicates this at build time. HEADERS_CHARSET gives the charset to
4231 translate to; headers_charset can change it in the configuration, and
4232 "headers charset" can change it in an individual filter file.
4234 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4235 that creates RFC 2047 encoded "words" labels them as that charset instead
4236 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4237 expansion operator; (ii) when Exim creates a From: line for a local
4238 message; (iii) when a header line is rewritten to include a "phrase" part.
4240 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4241 buggy, causing it to skip the first lines of messages whose message ID
4242 ended in 'D'. This would not have bitten before Exim release 4.14, because
4243 message IDs were unlikely to end in 'D' before then. The effect was to have
4244 incorrect size information for certain domains.
4246 45. #include "config.h" was missing at the start of the crypt16.c module. This
4247 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4250 46. If there was a timeout during a "random" callout check, Exim treated it as
4251 a failure of the random address, and carried on sending RSET and the real
4252 address. If the delay was just some slowness somewhere, the response to the
4253 original RCPT would be taken as a response to RSET and so on, causing
4254 mayhem of various kinds.
4256 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4257 when I implemented it. It didn't allow for the fact that some option values
4258 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4259 the right test for positive values.
4261 48. Domain names in DNS records are case-independent. Exim always looks them up
4262 in lower case. Some resolvers return domain names in exactly the case they
4263 appear in the zone file, that is, they may contain uppercase letters. Not
4264 all resolvers do this - some return always lower case. Exim was treating a
4265 change of case by a resolver as a change of domain, similar to a widening
4266 of a domain abbreviation. This triggered its re-routing code and so it was
4267 trying to route what was effectively the same domain again. This normally
4268 caused routing to fail (because the router wouldn't handle the domain
4269 twice). Now Exim checks for this case specially, and just changes the
4270 casing of the domain that it ultimately uses when it transmits the message
4273 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4276 50. If a filter generated a file delivery with a non-absolute name (possible if
4277 no home directory exists for the router), the forbid_file option was not
4280 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4281 the existing equality matching.
4283 52. Exim was using ints instead of ino_t variables in some places where it was
4284 dealing with inode numbers.
4286 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4287 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4288 called TMPDIR, and if it finds it is different, it changes its value.
4290 54. The smtp_printf() function is now made available to local_scan() so
4291 additional output lines can be written before returning. There is also an
4292 smtp_fflush() function to enable the detection of a dropped connection.
4293 The variables smtp_input and smtp_batched_input are exported to
4296 55. Changed the default runtime configuration: the message "Unknown user"
4297 has been removed from the ACL, and instead placed on the localuser router,
4298 using the cannot_route_message feature. This means that any verification
4299 failures that generate their own messages won't get overridden. Similarly,
4300 the "Unrouteable address" message that was in the ACL for unverifiable
4301 relay addresses has also been removed.
4303 56. Added hosts_avoid_esmtp to the smtp transport.
4305 57. The exicyclog script was not checking for the esoteric option
4306 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4307 will work only if exicyclog is run under the appropriate euid.
4309 58. Following a discussion on the list, the rules by which Exim recognises line
4310 endings on incoming messages have been changed. The -dropcr and drop_cr
4311 options are now no-ops, retained only for backwards compatibility. The
4312 following line terminators are recognized: LF CRLF CR. However, special
4313 processing applies to CR:
4315 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4316 nor a local message in the state where . is a terminator.
4318 (ii) If a bare CR is encountered in a header line, an extra space is added
4319 after the line terminator so as not to end the header. The reasoning
4320 behind this is that bare CRs in header lines are most likely either
4321 to be mistakes, or people trying to play silly games.
4323 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4324 was being incorrectly given as 18 bytes larger than it should have been.
4325 This is a VOB (very old bug).
4327 60. This may never have affected anything current, but just in case it has:
4328 When the local host is found other than at the start of a list of hosts,
4329 the local host, those with the same MX, and any that follow, are discarded.
4330 When the list in question was part of a longer list of hosts, the following
4331 hosts (not currently being processed) were also being discarded. This no
4332 longer happens. I'm not sure if this situation could ever has previously
4335 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4338 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4339 header. This is something that is recommended in a new Internet Draft, and
4340 is something that is documented as being done by Sendmail. There are two
4341 possible values. For messages generated by the autoreply transport, Exim
4344 Auto-Submitted: auto-replied
4346 whereas for all other generated messages (e.g. bounces) it adds
4348 Auto-Submitted: auto-generated
4350 63. The "personal" condition in filters now includes a test for the
4351 Auto-Submitted: header. If it contains the string "auto-" the message it
4352 not considered personal.
4354 64. Added rcpt_include_affixes as a generic transport option.
4356 65. Added queue_only_override (default true).
4358 66. Added the syslog_duplication option.
4360 67. If what should have been the first header line of a message consisted of
4361 a space followed by a colon, Exim was mis-interpreting it as a header line.
4362 It isn't of course - it is syntactically invalid and should therefore be
4363 treated as the start of the message body. The misbehaviour could have
4364 caused a number of strange effects, including loss of data in subsequent
4365 header lines, and spool format errors.
4367 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4368 client host had authenticated. This control can now be exercised by an ACL
4369 for more flexibility.
4371 69. By default, callouts do not happen when testing with -bh. There is now a
4372 variant, -bhc, which does actually run the callout code, including
4373 consulting and updating the callout cache.
4375 70. Added support for saslauthd authentication, courtesy of Alexander
4378 71. If statvfs() failed on the spool or log directories while checking their
4379 size for availability, Exim confusingly gave the error "space shortage".
4380 Furthermore, in debugging mode it crashed with a floating point exception.
4381 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4382 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4383 serious problem, Exim now writes to the main and panic logs when this
4384 happens, with details of the failure. It then refuses to accept the
4385 incoming message, giving the message "spool directory problem" or "log
4386 directory problem" with a 421 code for SMTP messages.
4388 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4389 0, 1, and 2 exist, because some OS complain for execs without them (see
4390 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4391 descriptors. However, the code omitted to check that the open succeeded,
4392 causing mysterious errors if for some reason the permissions on /dev/null
4393 got screwed. Now Exim writes a message to the main and panic logs, and
4394 bombs out if it can't open /dev/null.
4396 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4397 interact so that it is all more flexible. It is supposed to remain
4398 backwards compatible. Also added extra_local_interfaces.
4400 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4401 to bomb out with an assertion failure - to the client this appears as a
4402 connection drop. This problem occurs in the part of the code that was taken
4403 from the Samba project. Fortunately, the assertion is in a very simple
4404 function, so I have fixed this by reproducing the function inline in the
4405 one place where it is called, and arranging for authentication to fail
4406 instead of killing the process with assert().
4408 75. The SPA client code was not working when the server requested OEM rather
4409 than Unicode encoding.
4411 76. Added code to make require_files with a specific uid setting more usable in
4412 the case where statting the file as root fails - usually a non-root-mounted
4413 NFS file system. When this happens and the failure is EACCES, Exim now
4414 forks a subprocess and does the per-uid checking as the relevant uid.
4416 77. Added process_log_path.
4418 78. If log_file_path was not explicitly set, a setting of check_log_space or
4419 check_log_inodes was ignored.
4421 79. If a space check for the spool or log partitions fails, the incident is now
4422 logged. Of course, in the latter case the data may get lost...
4424 80. Added the %p formatting code to string_format() so that it can be used to
4425 print addresses in debug_print(). Adjusted all the address printing in the
4426 debugging in store.c to use %p rather than %d.
4428 81. There was a concern that a line of code in smtp_in.c could overflow a
4429 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4430 initially expressed, the concern was not well-founded, because trailing
4431 spaces are removed early. However, if the trailing spaces were followed by
4432 a NULL, they did not get removed, so the overflow was possible. Two fixes
4435 (a) I re-wrote the offending code in a cleaner fashion.
4436 (b) If an incoming SMTP command contains a NULL character, it is rejected
4439 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4440 runs initgroups(), so that if the Exim user is in any additional groups,
4441 they will be used during message reception.
4447 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob