1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.437 2006/11/20 11:57:56 ph10 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
326 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
333 SC/01 Use a glob alias rather than an array ref in eximstats generated
334 parser. This improves both readability and performance.
336 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
337 Don't display local sender or destination tables in eximstats unless
338 there is data to show.
339 Added average volumes into the eximstats top table text output.
341 SC/03 Collect data on the number of addresses (recipients) as well
342 as the number of messages in eximstats.
344 TF/01 Correct an error in the documentation for the redirect router. Exim
345 does (usually) call initgroups() when daemonizing.
347 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
348 with consistent privilege compared to when running as a daemon.
350 TF/03 Note in the spec that $authenticated_id is not set for local
351 submissions from trusted users.
353 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
354 Thanks to Dean Brooks <dean@iglou.com> for the patch.
356 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
357 by adding some example configuration directives to the default
358 configuration file. A little bit of work is required to uncomment the
359 directives and define how usernames and passwords are checked, but
360 there is now a framework to start from.
362 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
363 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
364 without this. I don't know how relevant this is to other LDAP libraries.
366 PH/02 Add the verb name to the "unknown ACL verb" error.
368 PH/03 Magnus Holmgren's patch for filter_prepend_home.
370 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
372 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
373 directory not expanded when it should be if an expanded home directory
374 was set for the address (which is overridden by the transport).
376 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
379 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
380 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
381 because it is too late at that time, and has no effect.
383 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
384 security issue with \' (bugzilla #107). I could not use the
385 PQescapeStringConn() function, because it needs a PGconn value as one of
388 PH/08 When testing addresses using -bt, indicate those final addresses that
389 are duplicates that would not cause an additional delivery. At least one
390 person was confused, thinking that -bt output corresponded to deliveries.
391 (Suppressing duplicates isn't a good idea as you lose the information
392 about possibly different redirections that led to the duplicates.)
394 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
395 systems where poll() doesn't work, in particular OS X.
397 PH/10 Added more information to debugging output for retry time not reached.
399 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
400 operations in malware.c.
402 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
405 PH/13 If write_rejectlog was set false when logging was sent to syslog with
406 syslog_duplication set false, log lines that would normally be written
407 both the the main log and to the reject log were not written to syslog at
410 PH/14 In the default configuration, change the use of "message" in ACL warn
411 statements to "add_header".
413 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
414 not followed by a command (e.g. "seen endif").
416 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
417 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
420 PH/17 Added extra conditions to the default value of delay_warning_condition
424 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
425 { match{$h_precedence:}{(?i)bulk|list|junk} } \
426 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
429 The Auto-Submitted: and various List- headers are standardised, whereas I
430 don't think Precedence: ever was.
432 PH/18 Refactored debugging code in route_finduser() to show more information,
433 in particular, the error code if getpwnam() issues one.
435 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
436 This is apparently needed in addition to the PH/07 change above to avoid
437 any possible encoding problems.
439 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
440 but not after initializing Perl.
442 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
443 output them only if debugging. By default they are written stderr,
444 apparently, which is not desirable.
446 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
449 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
452 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
454 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
455 authenticated or an ident call has been made. Suppress the default
456 values for $authenticated_id and $authenticated_sender (but permit -oMai
457 and -oMas) when testing with -bh.
459 PH/24 Re-jigged the order of the tests in the default configuration so that the
460 tests for valid domains and recipients precede the DNS black list and CSA
461 tests, on the grounds that those ones are more expensive.
463 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
464 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
465 This bug exists in every version of Exim that I still have, right back to
468 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
469 However, an attempt to turn on case-sensitivity in a regex key by
470 including (?-i) didn't work because the subject string was already
471 lowercased, and the effects were non-intuitive. It turns out that a
472 one-line patch can be used to allow (?-i) to work as expected.
478 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
479 other effects) broke the use of negated acl sub-conditions.
481 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
484 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
485 "Deny" causes Exim to reject the incoming connection with a 554 error.
486 Unfortunately, if there is a major crisis, such as a disk failure,
487 tcp-wrappers gives "deny", whereas what one would like would be some
488 kind of temporary error. A kludge has been added to help with this.
489 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
490 554 error is used if errno is still zero or contains ENOENT (which occurs
491 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
494 PH/03 Add -lutil to the default FreeBSD LIBS setting.
496 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
497 errors. Otherwise a message that provokes a temporary error (when other
498 messages do not) can cause a whole host to time out.
500 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
501 addresses were routed directly to files or pipes from a redirect router.
502 File deliveries just didn't batch; pipe deliveries might have suffered
505 PH/06 A failure to get a lock for a hints database would erroneously always say
506 "Failed to get write lock", even when it was really a read lock.
508 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
509 of 0600. This has been changed to use the value of the lockfile_mode
510 option (which defaults to 0600).
512 PH/08 Applied small patch from the Sieve maintainer.
514 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
515 folder from quota calculations, a direct delivery into this folder messed
516 up the contents of the maildirsize file. This was because the regex was
517 used only to exclude .Trash (or whatever) when the size of the mailbox
518 was calculated. There was no check that a delivery was happening into an
519 excluded directory. This bug has been fixed by ignoring all quota
520 processing for deliveries into excluded directories.
522 PH/10 Added the maildirfolder_create_regex option to appendfile.
528 PH/01 The code for finding all the local interface addresses on a FreeBSD
529 system running IPv6 was broken. This may well have applied to all BSD
530 systems, as well as to others that have similar system calls. The broken
531 code found IPv4 interfaces correctly, but gave incorrect values for the
532 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
533 that it would not match correctly against @[] and not recognize the IPv6
536 PH/02 The ipliteral router was not recognizing addresses of the form user@
537 [ipv6:....] because it didn't know about the "ipv6:" prefix.
539 PH/03 Added disable_ipv6.
541 PH/04 Changed $reply_address to use the raw form of the headers instead of the
542 decoded form, because it is most often used to construct To: headers
543 lines in autoreplies, and the decoded form may well be syntactically
544 invalid. However, $reply_address has leading white space removed, and all
545 newlines turned into spaces so that the autoreply transport does not
548 PH/05 If group was specified without a user on a router, and no group or user
549 was specified on a transport, the group from the router was ignored.
551 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
552 for visible compile-time settings that can be used to change these
553 numbers, for those that want even more. Backwards compatibility with old
554 spool files has been maintained. However, going back to a previous Exim
555 release will lost any variables that are in spool files.
557 PH/07 Two small changes when running in the test harness: increase delay when
558 passing a TCP/IP connection to a new process, in case the original
559 process has to generate a bounce, and remove special handling of
560 127.0.0.2 (sic), which is no longer necessary.
562 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
563 be the same on different OS.
565 PH/09 Moved a debug statement in filter processing to avoid a race problem when
568 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
569 whether --show-vars was specified or not
571 JJ/02 exipick: Added support for new ACL variable spool format introduced
574 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
575 syntactically invalid From: or Reply-to: line, and a filter used this to
576 generate an autoreply, and therefore failed to obtain an address for the
577 autoreply, Exim could try to deliver to a non-existent relative file
578 name, causing unrelated and misleading errors. What now happens is that
579 it logs this as a hard delivery error, but does not attempt to create a
582 PH/11 The exinext utility has a -C option for testing purposes, but although
583 the given file was scanned by exinext itself; it wasn't being passed on
584 when Exim was called.
586 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
587 an end-of-file indication when reading a command response.
589 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
590 compiled. In many other places in Exim, IPv6 addresses are always
591 recognized, so I have changed this. It also means that IPv4 domain
592 literals of the form [IPV4:n.n.n.n] are now always recognized.
594 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
595 used if the router is not running as root, for example, when verifying at
596 ACL time, or when using -bh. The debugging output from this situation was
597 non-existent - all you got was a failure to exec. I have made two
600 (a) Failures to set uid/gid, the current directory, or a process leader
601 in a subprocess such as that created by queryprogram now generate
602 suitable debugging ouput when -d is set.
604 (b) The queryprogram router detects when it is not running as root,
605 outputs suitable debugging information if -d is set, and then runs
606 the subprocess without attempting to change uid/gid.
608 PH/15 Minor change to Makefile for building test_host (undocumented testing
611 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
612 additional section of a DNS packet that returns MX or SRV records.
613 Instead, it always explicitly searches for A/AAAA records. This avoids
614 major problems that occur when a DNS server includes only records of one
615 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
616 fixed another bug: if SRV records were looked up and the corresponding
617 address records were *not* found in the additional section, the port
618 values from the SRV records were lost.
620 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
621 using the correct key (the original address) when searching the retry
622 rules in order to find which one to use for generating the retry hint.
624 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
625 adding the default one. Similarly, if it contains a Reply-To: header, the
626 errors_reply_to option, if set, is not used.
628 PH/19 When calculating a retry time, Exim used to measure the "time since
629 failure" by looking at the "first failed" field in the retry record. Now
630 it does not use this if it is later than than the arrival time of the
631 message. Instead it uses the arrival time. This makes for better
632 behaviour in cases where some deliveries succeed, thus re-setting the
633 "first failed" field. An example is a quota failure for a huge message
634 when small messages continue to be delivered. Without this change, the
635 "time since failure" will always be short, possible causing more frequent
636 delivery attempts for the huge message than are intended.
637 [Note: This change was subsequently modified - see PH/04 for 4.62.]
639 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
640 $1, $2, $3) because the numerical variables can be reset during some
641 expansion items (e.g. "match"), thereby losing the authentication data.
643 PH/21 Make -bV show the size of off_t variables so that the test suite can
644 decide whether to run tests for quotas > 2G.
646 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
647 mailbox_size, and mailbox_filecount in the appendfile transport. If a
648 filecount value is greater than 2G or if a quota value is greater than 2G
649 on a system where the size of off_t is not greater than 4, a panic error
652 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
653 never match. The debug and -bh output now contains an explicit error
654 message indicating a malformed IPv4 address or mask.
656 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
657 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
660 PH/25 Do not write to syslog when running in the test harness. The only
661 occasion when this arises is a failure to open the main or panic logs
662 (for which there is an explicit test).
664 PH/26 Added the /no_tell option to "control=freeze".
666 PH/27 If a host name lookup failed very early in a connection, for example, if
667 the IP address matched host_lookup and the reverse lookup yielded a name
668 that did not have a forward lookup, an error message of the form "no IP
669 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
670 could be logged. Now it outputs the IP address instead of "NULL".
672 PH/28 An enabling patch from MH: add new function child_open_exim2() which
673 allows the sender and the authenticated sender to be set when
674 submitting a message from within Exim. Since child_open_exim() is
675 documented for local_scan(), the new function should be too.
677 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
678 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
679 results in an empty string is now treated as unset.
681 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
683 PH/31 Added sender_verify_fail logging option.
685 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
686 needed by RFC 822 but not by RFC 2822 was commented out. I have now
687 tidied the source and removed it altogether.
689 PH/33 When a queue run was abandoned because the load average was too high, a
690 log line was always written; now it is written only if the queue_run log
691 selector is set. In addition, the log line for abandonment now contains
692 information about the queue run such as the pid. This is always present
693 in "start" and "stop" lines but was omitted from the "abandon" line.
695 PH/34 Omit spaces between a header name and the colon in the error message that
696 is given when verify = headers_syntax fails (if there are lots of them,
697 the message gets confusing).
699 PH/35 Change the default for dns_check_names_pattern to allow slashes within
700 names, as there are now some PTR records that contain slashes. This check
701 is only to protect against broken name servers that fall over on strange
702 characters, so the fact that it applies to all lookups doesn't matter.
704 PH/36 Now that the new test suite is complete, we can remove some of the
705 special code in Exim that was needed for the old test suite. For example,
706 sorting DNS records because real resolvers return them in an arbitrary
707 order. The new test suite's fake resolver always returns records in the
710 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
711 bounces) except when queue_only is set, to avoid logging races between
712 the different processes.
714 PH/38 Panic-die if .include specifies a non-absolute path.
716 PH/39 A tweak to the "H" retry rule from its user.
718 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
719 a label. They prevented compilation on older perls.
721 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
722 a warning to be raised on newish perls.
724 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
725 on queue. Changes to match documented behaviour of showing count of
726 messages matching specified criteria.
728 PH/40 Changed the default ident timeout from 30s to 5s.
730 PH/41 Added support for the use of login_cap features, on those BSD systems
731 that have them, for controlling the resources used by pipe deliveries.
733 PH/42 The content-scanning code uses fopen() to create files in which to put
734 message data. Previously it was not paying any attention to the mode of
735 the files. Exim runs with umask(0) because the rest of the code creates
736 files with open(), and sets the required mode explicitly. Thus, these
737 files were ending up world-writeable. This was not a big issue, because,
738 being within the spool directory, they were not world-accessible. I have
739 created a function called modefopen, which takes an additional mode
740 argument. It sets umask(777), creates the file, chmods it to the required
741 mode, then resets the umask. All the relevant calls to fopen() in the
742 content scanning code have been changed to use this function.
744 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
745 to 24 hours. This avoids potential overflow problems when processing G
746 and H retry rules. I suspect nobody ever tinkers with this value.
748 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
750 PH/45 When the plaintext authenticator is running as a client, the server's
751 challenges are checked to ensure they are valid base64 strings. By
752 default, the authentication attempt is cancelled if an invalid string is
753 received. Setting client_ignore_invalid_base64 true ignores these errors.
754 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
755 they are received. Thus, the responses can be made to depend on the
756 challenges. If an invalid string is ignored, an empty string is placed in
759 PH/46 Messages that are created by the autoreply transport now contains a
760 References: header, in accordance with RFCs 2822 and 3834.
762 PH/47 Added authenticated_sender_force to the smtp transport.
764 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
766 PH/49 Installed latest patch from the Sieve maintainer.
768 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
769 was also set, the appendfile transport was unnecessarily scanning a
770 directory of message files (e.g. for maildir delivery) to find the count
771 of files (along with the size), even though it did not need this
772 information. It now does the scan only if it needs to find either the
773 size of the count of files.
775 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
777 PH/52 Two bugs concerned with error handling when the smtp transport is
780 (i) Exim was not creating retry information for temporary errors given
781 for individual recipients after the DATA command when the smtp transport
782 was used in LMTP mode. This meant that they could be retried too
783 frequently, and not timed out correctly.
785 (ii) Exim was setting the flag that allows error details to be returned
786 for LMTP errors on RCPT commands, but not for LMTP errors for individual
787 recipients that were returned after the DATA command.
789 PH/53 This is related to PH/52, but is more general: for any failing address,
790 when detailed error information was permitted to be returned to the
791 sender, but the error was temporary, then after the final timeout, only
792 "retry timeout exceeded" was returned. Now it returns the full error as
793 well as "retry timeout exceeded".
795 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
796 do this, and (what is worse) MTAs that accept it.
798 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
799 will now be deprecated.
801 PH/56 New os.c-cygwin from the Cygwin maintainer.
803 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
804 formats (previously only available in exim formats via -bpr, -bpru,
805 and -bpra. Now also available in native and exiqgrep formats)
807 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
808 with very large, slow to parse queues
810 JJ/08 exipick: added ! as generic prefix to negate any criteria format
812 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
814 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
815 responses to authentication challenges, though it was showing the
816 challenges; (ii) I've removed the CR characters from the debug output for
819 PH/58 Allow for the insertion of a newline as well as a space when a string
820 is turned into more than one encoded-word during RFC 2047 encoding. The
821 Sieve code now uses this.
823 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
824 data_4xx, lost_connection, tls_required.
826 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
827 message was being sent as an SMTP response.
829 PH/61 Add -l and -k options to exicyclog.
831 PH/62 When verifying, if an address was redirected to one new address, so that
832 verification continued, and the new address failed or deferred after
833 having set something in $address_data, the value of $address_data was not
834 passed back to the ACL. This was different to the case when no
835 redirection occurred. The value is now passed back in both cases.
837 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
838 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
839 use login_cap.h, so on its own it isn't the distinguishing feature. The
840 new name refers directly to the setclassresources() function.
842 PH/65 Added configuration files for NetBSD3.
844 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
846 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
847 is preferred over IPv4.
849 PH/68 The bounce_return_message and bounce_return_body options were not being
850 honoured for bounces generated during the reception of non-SMTP messages.
851 In particular, this applied to messages rejected by the ACL. This bug has
852 been fixed. However, if bounce_return_message is true and bounce_return_
853 body is false, the headers that are returned for a non-SMTP message
854 include only those that have been read before the error was detected.
855 (In the case of an ACL rejection, they have all been read.)
857 PH/69 The HTML version of the specification is now built in a directory called
858 spec_html instead of spec.html, because the latter looks like a path with
859 a MIME-type, and this confuses some software.
861 PH/70 Catch two compiler warnings in sieve.c.
863 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
864 function verify_get_ident() calls ip_connect() to connect a socket, but
865 if the "connect()" function timed out, ip_connect() used to close the
866 socket. However, verify_get_ident() also closes the socket later, and in
867 between Exim writes to the log, which may get opened at this point. When
868 the socket was closed in ip_connect(), the log could get the same file
869 descriptor number as the socket. This naturally causes chaos. The fix is
870 not to close the socket in ip_connect(); the socket should be closed by
871 the function that creates it. There was only one place in the code where
872 this was missing, in the iplookup router, which I don't think anybody now
873 uses, but I've fixed it anyway.
875 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
876 well as to direct DNS lookups. Otherwise the handling of names in host
877 lists is inconsistent and therefore confusing.
883 PH/01 Two changes to the default runtime configuration:
885 (1) Move the checks for relay_from_hosts and authenticated clients from
886 after to before the (commented out) DNS black list checks.
888 (2) Add control=submission to the relay_from_hosts and authenticated
889 clients checks, on the grounds that messages accepted by these
890 statements are most likely to be submissions.
892 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
894 (1) Generate an error if the third argument for the ${prvs expansion is
897 (2) Treat a missing third argument of ${prvscheck as if it were an empty
900 (3) Reset the variables that are obtained from the first argument of
901 ${prvscheck and used in the second argument before leaving the code,
902 because their memory is reclaimed, so using them afterwards may do
905 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
906 one (it's much easier than Tom thought :-).
908 (5) Because of (4), we can now allow for the use of $prvscheck_result
909 inside the third argument.
911 PH/03 For some reason, the default setting of PATH when running a command from
912 a pipe transport was just "/usr/bin". I have changed it to
915 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
916 anything to be listed in the output from -bV.
918 PH/05 When a filter generated an autoreply, the entire To: header line was
919 quoted in the delivery log line, like this:
921 => >A.N.Other <ano@some.domain> <original@ddress> ...
923 This has been changed so that it extracts the operative address. There
924 may be more than one such address. If so, they are comma-separated, like
927 => >ano@some.domain,ona@other.domain <original@ddress> ...
929 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
930 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
931 not being looked up in the rDNS to get a host name, Exim was showing the
932 IP address twice in Received: lines, even though the IP addresses were
933 identical. For example:
935 Received: from [1.2.3.4] (helo=[1.2.3.4])
937 However, if the real host name was known, it was omitting the HELO data
938 if it matched the actual IP address. This has been tidied up so that it
939 doesn't show the same IP address twice.
941 PH/07 When both +timestamp and +memory debugging was on, the value given by
942 $tod_xxx expansions could be wrong, because the tod_stamp() function was
943 called by the debug printing, thereby overwriting the timestamp buffer.
944 Debugging no longer uses the tod_stamp() function when +timestamp is set.
946 PH/08 When the original message was included in an autoreply transport, it
947 always said "this is a copy of the message, including all the headers",
948 even if body_only or headers_only was set. It now gives an appropriate
951 PH/09 Applied a patch from the Sieve maintainer which:
953 o fixes some comments
954 o adds the (disabled) notify extension core
955 o adds some debug output for the result of if/elsif tests
956 o points to the current vacation draft in the documentation
957 and documents the missing references header update
961 o fixes a bug in processing the envelope test (when testing
962 multiple envelope elements, the last element determinted the
965 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
966 Electronic Mail") by including:
968 Auto-submitted: auto-generated
970 in the messages that it generates (bounce messages and others, such as
971 warnings). In the case of bounce messages for non-SMTP mesages, there was
972 also a typo: it was using "Auto_submitted" (underscore instead of
973 hyphen). Since every message generated by Exim is necessarily in response
974 to another message, thes have all been changed to:
976 Auto-Submitted: auto-replied
978 in accordance with these statements in the RFC:
980 The auto-replied keyword:
982 - SHOULD be used on messages sent in direct response to another
983 message by an automatic process,
985 - MUST NOT be used on manually-generated messages,
987 - MAY be used on Delivery Status Notifications (DSNs) and Message
988 Disposition Notifications (MDNs),
990 - MUST NOT be used on messages generated by automatic or periodic
991 processes, except for messages which are automatic responses to
994 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
995 to the default Received: header definition.
997 PH/12 Added log selector acl_warn_skipped (default on).
999 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1000 variables because (a) they are in the wrong storage pool and (b) even if
1001 they were copied, it wouldn't work properly because of the caching.
1003 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1004 checking when decoding. Apparently there are clients that generate
1005 overlong encoded strings. Why am I not surprised?
1007 PH/15 If the first argument of "${if match_address" was not empty, but did not
1008 contain an "@" character, Exim crashed. Now it writes a panic log message
1009 and treats the condition as false.
1011 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1013 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1014 extension "envelope-auth". The code is finished and in agreement with
1015 other implementations, but there is no documentation so far and in fact,
1016 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1017 not changing the active code.
1019 Print executed "if" and "elsif" statements when debugging is used. This
1020 helps a great deal to understand what a filter does.
1022 Document more things not specified clearly in RFC3028. I had all this
1023 sorted out, when out of a sudden new issues came to my mind. Oops."
1025 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1028 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1029 canonical form (as documented). However, after a host name lookup from
1030 the IP address, check_host() was doing a simple string comparison with
1031 addresses acquired from the DNS when checking that the found name did
1032 have the original IP as one of its addresses. Since any found IPv6
1033 addresses are likely to be in abbreviated form, the comparison could
1034 fail. Luckily, there already exists a function for doing the comparison
1035 by converting both addresses to binary, so now that is used instead of
1036 the text comparison.
1038 PH/20 There was another similar case to PH/19, when a complete host name was
1039 given in a host list; looking up its IP address could give an abbreviated
1040 form, whereas the current host's name might or might not be abbreviated.
1041 The same fix has been applied.
1047 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1048 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1051 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1052 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1054 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1056 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1057 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1058 Also, for "Auto-Submitted", treat anything other than "no" as
1059 non-personal, in accordance with RFC 3834. (Previously it treated
1060 anything starting "auto-" as non-personal.)
1062 TF/01 The control=submission/name=... option had a problem with syntax
1063 errors if the name included a slash character. The /name= option
1064 now slurps the rest of the string, so it can include any characters
1065 but it must come last in the list of options (after /sender_retain
1068 PH/05 Some modifications to the interface to the fake nameserver for the new
1076 TK/01 Added the "success_on_redirect" address verification option. See
1077 NewStuff for rationale and an example.
1079 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1081 PH/02 Patch to exigrep to allow it to work on syslog lines.
1083 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1084 fread() to skip over the body file's header line, because in Cygwin the
1085 header line is locked and is inaccessible.
1087 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1088 co-exist for some time) to make it clear that it is the Exim ID that is
1089 referenced, not the Message-ID: header line.
1091 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1092 string_format() function, because snprintf() does not exist on all
1095 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1096 ${stat: expansion item.
1098 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1099 protocol synchronization error", to keep the pedants happy.
1101 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1102 well as for IRIX systems, when gcc is being used. See the host.c source
1105 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1107 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1110 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1111 transport and to the smtp transport in LMTP mode.
1113 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1115 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1116 run a filter in a subprocess. This could lead to confusion in subsequent
1117 lookups in the parent process. There should also be a search_tidyup() at
1118 the end of the subprocess.
1120 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1121 only if the host matched helo_try_verify_hosts, which caused the
1122 verification to occur when the EHLO/HELO command was issued. The ACL just
1123 tested the remembered result. Now, if a previous verification attempt has
1124 not happened, "verify = helo" does it there and then.
1126 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1128 TK/03 Fix log output including CR from clamd.
1130 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1131 exist provoked a memory error which could cause a segfault.
1133 PH/15 Installed PCRE 6.2
1135 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1137 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1138 of the problem. Specifically, suggested +O2 rather than +O1 for the
1141 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1143 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1144 record, the port was not correctly logged when the outgoing_port log
1145 selector was set (it logged the transort's default port).
1147 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1148 fallback_hosts, and "hosts" in the smtp transport.
1150 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1151 host errors such as "Connection refused".
1153 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1154 authentication with radiusclient 0.4.9:
1156 - Error returned from rc_read_config was caught wrongly
1157 - Username/password not passed on to radius server due to wrong length.
1159 The presumption is that some radiusclient API changes for 4.51/PH/17
1160 were not taken care of correctly. The code is still untested by me (my
1161 Linux distribution still has 0.3.2 of radiusclient), but it was
1162 contributed by a Radius user.
1164 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1165 expanding the "port" option of the smtp transport.
1167 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1168 while reading a MIME header. Thanks to Tom Hughes for a patch.
1170 PH/24 Include config.h inside local_scan.h so that configuration settings are
1173 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1174 that in an ACL for RCPT (for example), you can examine exactly what was
1177 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1178 commands, but it was not correctly comparing the address with the actual
1179 client host address. Thus, it would show the EHLO address in Received:
1180 header lines when this was not necessary.
1182 PH/27 Added the % operator to ${eval:}.
1184 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1185 it should be ignoring failures (because with -C, for example, it has lost
1186 privilege). It wasn't ignoring creation failures other than "already
1189 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1192 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1193 because an input line was too long, either on its own, or by virtue of
1194 too many continuations, the temporary file was not being removed, and the
1195 return code was incorrect.
1197 PH/31 Missing "BOOL" in function definition in filtertest.c.
1199 PH/32 Applied Sieve patches from the maintainer.
1201 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1203 PH/33 Added "verify = not_blind".
1205 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1206 Local/Makefile (with some defaults set). These are used in built scripts
1207 such as exicyclog, but they have never been used in the exim_install
1208 script (though there are many overriding facilities there). I have
1209 arranged that the exim_install script now takes note of these two
1212 PH/35 Installed configuration files for Dragonfly.
1214 PH/36 When a locally submitted message by a trusted user did not contain a
1215 From: header, and the sender address was obtained from -f or from an SMTP
1216 MAIL command, and the trusted user did not use -F to supply a sender
1217 name, $originator_name was incorrectly used when constructing a From:
1218 header. Furthermore, $originator_name was used for submission mode
1219 messages from external hosts without From: headers in a similar way,
1220 which is clearly wrong.
1222 PH/37 Added control=suppress_local_fixups.
1224 PH/38 When log_selector = +received_sender was set, and the addition of the
1225 sender made the log line's construction buffer exactly full, or one byte
1226 less than full, an overflow happened when the terminating "\n" was
1229 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1230 when the result of a list match is failure because a DNS lookup failed.
1232 PH/40 RM_COMMAND is now used in the building process.
1234 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1235 the "build-* directories that it finds.
1237 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1238 address in a domain literal was a prefix of an interface address.
1240 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1241 when verifying a sender address, unless rewrite_headers is false.
1243 PH/44 Wrote a long comment about why errors_to addresses are verified as
1244 recipients, not senders.
1246 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1247 the ratelimit ACL was added.
1249 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1251 PH/46 Added extra information about PostgreSQL errors to the error string.
1253 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1254 avoiding the need to install special zones in a real server. This is
1255 backwards compatible; if it can't find the fake resolver, it drops back.
1256 Thus, both old and new test suites can be run.
1258 TF/02 Added util/ratelimit.pl
1260 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1261 clock is set back in time.
1263 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1264 Candler <B.Candler@pobox.com>.
1266 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1267 OK for addresses that are the result of redirections.
1269 PH/48 A number of further additions for the benefit of the new test suite,
1270 including a fake gethostbyname() that interfaces to the fake DNS resolver
1273 TF/06 The fix for widen_domains has also been applied to qualify_single and
1274 search_parents which are the other dnslookup options that can cause
1277 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1280 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1282 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1283 service" if it encountered an MX record with an empty target hostname.
1284 The message is now "an MX or SRV record indicated no SMTP service".
1286 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1287 if the DNS of the sending site is misconfigured. This is quite a
1288 common situation. This change restores the behaviour of treating a
1289 helo verification defer as a failure.
1291 PH/51 If self=fail was set on a router, the bounce message did not include the
1292 actual error message.
1298 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1300 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1301 command itself ended in error, the underlying message about the transport
1302 filter timeout was being overwritten with the pipe command error. Now the
1303 underlying error message should be appended to the second error message.
1305 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1307 PH/02 Reduce the amount of output that "make" produces by default. Full output
1308 can still be requested.
1310 PH/03 The warning log line about a condition test deferring for a "warn" verb
1311 was being output only once per connection, rather than after each
1312 occurrence (because it was using the same function as for successful
1313 "warn" verbs). This seems wrong, so I have changed it.
1315 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1316 it should not have, which might have caused a crash in the right
1317 circumstances, but probably never did.
1319 PH/04 Installed a modified version of Tony Finch's patch to make submission
1320 mode fix the return path as well as the Sender: header line, and to
1321 add a /name= option so that you can make the user's friendly name appear
1324 TF/03 Added the control = fakedefer ACL modifier.
1326 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1327 Mark Lowes for thorough testing.
1329 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1331 TK/03 Merged latest SRS patch from Miles Wilton.
1333 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1334 with the definition in sysexits.h (which is #included earlier).
1335 Fortunately, Exim does not actually use EX_OK. The code used to try to
1336 preserve the sysexits.h value, by assumimg that macro definitions were
1337 scanned for macro replacements. I have been disabused of this notion,
1338 so now the code just undefines EX_OK before #including unistd.h.
1340 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1341 in the smtp transport. When a block could not be written in a single
1342 write() function, the timeout was being re-applied to each part-write.
1343 This seems wrong - if the receiver was accepting one byte at a time it
1344 would take for ever. The timeout is now adjusted when this happens. It
1345 doesn't have to be particularly precise.
1347 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1348 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1350 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1351 without a domain if the check to <postmaster@domain> fails.
1353 SC/01 Eximstats: added -xls and the ability to specify output files
1354 (patch written by Frank Heydlauf).
1356 SC/02 Eximstats: use FileHandles for outputing results.
1358 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1360 SC/04 Eximstats: fixed display of large numbers with -nvr option
1362 SC/05 Eximstats: fixed merging of reports with empty tables.
1364 SC/06 Eximstats: added the -include_original_destination flag
1366 SC/07 Eximstats: removed tabs and trailing whitespace.
1368 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1370 TK/06 MBOX spool code: Add real "From " MBOX separator line
1371 so the .eml file is really in mbox format (even though
1372 most programs do not really care). Patch from Alex Miller.
1374 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1375 The latter is generated from $received_to and is only set if the
1376 message has one envelope recipient. SA can use these headers,
1377 obviously out-of-the-box. Patch from Alex Miller.
1379 PH/08 The ${def test on a variable was returning false if the variable's
1380 value was "0", contrary to what the specification has always said!
1381 The result should be true unless the variable is empty.
1383 PH/09 The syntax error of a character other than { following "${if
1384 def:variable_name" (after optional whitespace) was not being diagnosed.
1385 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1386 accidental colon was present, for example, could give incorrect results.
1388 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1389 result is used (not including appendfile, where other changes are about
1392 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1393 This involved changing a lot of size variables from int to off_t. It
1394 should work with maildirs and everything.
1396 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1397 spamd dying while we are connected to it.
1399 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1402 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1403 function for BDB 4.3.
1405 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1407 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1408 the sources for PCRE have been re-arranged and more files are now
1411 PH/15 The code I had for printing potentially long long variables in PH/11
1412 above was not the best (it lost precision). The length of off_t variables
1413 is now inspected at build time, and an appropriate printing format (%ld
1414 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1415 to be "long long int" or "long int". This is needed for the internal
1416 formatting function string_vformat().
1418 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1419 the configuration file to be ":syslog", then the script "guesses" where
1420 the logs files are, rather than using the compiled in default. In our
1421 case the guess is not the same as the compiled default, so the script
1422 suddenly stopped working when I started to use syslog. The patch checks
1423 to see if log_file_path is "". If so, it attempts to read it from exim
1424 with no configuration file to get the compiled in version, before it
1425 falls back to the previous guessing code."
1427 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1428 implementing BATV in an Exim configuration. See NewStuff for the gory
1431 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1432 Makefile that are specific to HP-UX.
1434 PH/18 If the "use_postmaster" option was set for a recipient callout together
1435 with the "random" option, the postmaster address was used as the MAIL
1436 FROM address for the random test, but not for the subsequent recipient
1437 test. It is now used for both.
1439 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1440 patch removes a few documentation additions to RFC 3028, because the
1441 latest draft now contains them. It adds the new en;ascii-case comparator
1442 and a new error check for 8bit text in MIME parts. Comparator and
1443 require names are now matched exactly. I enabled the subaddress
1444 extension, but it is not well tested yet (read: it works for me)."
1446 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1447 rework some of the code of TK/09 above to avoid the hardwired use of
1448 "%lld" and "long long". Replaced the call to snprintf() with a call to
1451 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1452 records point to non-existent hosts", "retry timeout exceeded", and
1453 "retry time not reached for any host after a long failure period".
1455 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1456 experimental DomainKeys support:
1458 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1459 (2) On an error such as an illegally used "control", the wrong name for
1460 the control was given.
1462 These problems did NOT occur unless DomainKeys support was compiled.
1464 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1466 PH/24 Added ${if match_ip condition.
1468 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1469 databases so that it will be absolutely obvious if a crash occurs in the
1470 DB library. This is a regular occurrence (often caused by mis-matched
1473 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1474 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1475 picked up on a user's system that detects such things. There doesn't seem
1476 to be a gcc warning option for this - only an attribute that has to be
1477 put on the function's prototype. It seems that in Fedora Core 4 they have
1478 set this on a number of new functions. No doubt there will be more in due
1481 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1482 specify a transport. However, if an address that was verified by such a
1483 router was the subject of a callout, Exim crashed because it tried to
1484 read the rcpt_include_affixes from the non-existent transport. Now it
1485 just assumes that the setting of that option is false. This bug was
1486 introduced by 4.51/PH/31.
1488 PH/28 Changed -d+all to exclude +memory, because that information is very
1489 rarely of interest, but it makes the output a lot bigger. People tend to
1490 do -d+all out of habit.
1492 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1493 code in os-type was giving problems when libc.so lives in lib64, like on
1496 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1497 aren't the modern standard, and it seems that some systems' include files
1498 don't always have them. Exim was already checking for some of the newer
1499 ones like T_AAAA, and defining it itself. I've added checks for all the
1500 record types that Exim uses.
1502 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1503 not automatically generating a new one, as it is supposed to. This
1504 prevented TLS from working. If the file did exist, but contained invalid
1505 data, a new version was generated, as expected. It was only the case of a
1506 non-existent file that was broken.
1508 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1509 with a change in libdomainkeys > 0.64.
1511 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1512 from DNS. If the selector record carries the flag, it now has
1513 precedence over the domain-wide flag.
1515 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1517 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1518 the use of a port name that isn't defined in /etc/services) occurred, the
1519 message was deferred as in a normal delivery, and thus remained on the
1520 spool, instead of being failed because of the mua_wrapper setting. This
1521 is now fixed, and I tidied up some of the mua_wrapper messages at the
1524 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1525 the messages in a hash of arrays rather than using individual hashes.
1526 This is a bit cleaner and results in dramatic memory savings, albeit
1527 at a slight CPU cost.
1529 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1530 as requested by Marc Sherman.
1532 SC/10 Eximstats: added histograms for user specified patterns as requested
1535 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1537 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1538 fopen() in the content-scanning modules that did not already have it.
1544 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1545 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1547 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1549 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1551 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1552 to test Sieve filters that use "vacation".
1554 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1555 that changes the way the GnuTLS parameters are stored in the cache file.
1556 The new format can be generated externally. For backward compatibility,
1557 if the data in the cache doesn't make sense, Exim assumes it has read an
1558 old-format file, and it generates new data and writes a new file. This
1559 means that you can't go back to an older release without removing the
1562 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1563 work if there are any delivery delays because "one_time" forces the
1564 parent to be marked "delivered", so its unseen clone is never tried
1565 again. For this reason, Exim now forbids the simultaneous setting of
1568 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1569 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1570 entry if you want to know the details. The fix, however, neglected to
1571 consider the case when local delivery batching is involved. The test for
1572 "previously delivered" was not happening when checking to see if an
1573 address could be batched with a previous (undelivered) one; under
1574 certain circumstances this could lead to multiple deliveries to the same
1577 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1578 in its include files, and this causes problems building Exim.
1580 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1581 header_syntax) but Exim was just ignoring anything given after a slash.
1582 In particular, this caused confusion with an attempt to use "verify =
1583 reverse_host_lookup/defer_ok". An error is now given when options are
1584 supplied for verify items that do not have them. (Maybe reverse_host_
1585 lookup should have a defer_ok option, but that's a different point.)
1587 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1588 defined by RFC 821) to 2048, because there were problems with some AUTH
1589 commands, and RFC 1869 says the size should be increased for extended
1590 SMTP commands that take arguments.
1592 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1595 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1596 "unknown" error; now it says that the functionality isn't in the binary.
1598 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1599 an address' error message when a string expansion fails (syntax or
1600 whatever). Otherwise the password may appear in the log. Following change
1601 PH/42 below, there is no longer a chance of it appearing in a bounce
1604 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1606 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1607 of its addresses was ever tried. (Bugzilla bug #2.)
1609 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1610 the result incorrectly in the debug output. (It correctly added a newline
1611 to what was transported.)
1613 TF/01 Added $received_time.
1615 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1616 commented out examples of how to interface to a virus scanner and to
1617 SpamAssassin. Also added commented examples of av_scanner and
1618 spamd_address settings.
1620 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1621 and controls are allowed in which ACLs. There were a couple of minor
1622 errors. Some of the entries in the conditions table (which is a table of
1623 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1624 negation of where the condition IS allowed.
1626 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1628 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1629 header file does not have a version number, so I've had to invent a new
1630 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1631 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1632 radiusclient), but it was contributed by a Radius user.
1634 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1635 files or directories, for OpenSSL.
1637 PH/19 When an Exim process that is running as root has to create an Exim log
1638 file, it does so in a subprocess that runs as exim:exim so as to get the
1639 ownership right at creation (otherwise, other Exim processes might see
1640 the file with the wrong ownership). There was no test for failure of this
1641 fork() call, which would lead to the process getting stuck as it waited
1642 for a non-existent subprocess. Forks do occasionally fail when resources
1643 run out. I reviewed all the other calls to fork(); they all seem to check
1646 PH/20 When checking for unexpected SMTP input at connect time (before writing
1647 the banner), Exim was not dealing correctly with a non-positive return
1648 from the read() function. If the client had disconnected by this time,
1649 the result was a log entry for a synchronization error with an empty
1650 string after "input=" when read() returned zero. If read() returned -1
1651 (an event I could not check), uninitialized data bytes were printed.
1652 There were reports of junk text (parts of files, etc) appearing after
1655 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1657 PH/22 Added support for macro redefinition, and (re)definition in between
1658 driver and ACL definitions.
1660 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1661 forgetting to use the resulting value; it was using the unexpanded value.
1663 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1664 hadn't been configured. The fix is from Juergen Kreileder, who
1665 understands it better than I do:
1667 "Here's what I see happening with three configured cyrus_sasl
1668 authenticators configured (plain, login, cram-md5):
1670 On startup auth_cyrus_sasl_init() gets called for each of these.
1671 This means three calls to sasl_listmech() without a specified mech_list.
1672 => SASL tests which mechs of all available mechs actually work
1673 => three warnings about OTP not working
1674 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1676 With the patch, sasl_listmech() also gets called three times. But now
1677 SASL's mech_list option is set to the server_mech specified in the the
1678 authenticator. Or in other words, the answer from sasl_listmech()
1679 gets limited to just the mech you're testing for (which is different
1681 => the return list contains just 'plain' or 'login', 'cram-md5' or
1682 nothing depending on the value of ob->server_mech.
1684 I've just tested the patch: Authentication still works fine,
1685 unavailable mechs specified in the exim configuration are still
1686 caught, and the auth.log warnings about OTP are gone."
1688 PH/25 When debugging is enabled, the contents of the command line are added
1689 to the debugging output, even when log_selector=+arguments is not
1692 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1693 answer is "GNU", and only if the return is "GNU/something" is the answer
1696 PH/27 $acl_verify_message is now set immediately after the failure of a
1697 verification in an ACL, and so is available in subsequent modifiers. In
1698 particular, the message can be preserved by coding like this:
1700 warn !verify = sender
1701 set acl_m0 = $acl_verify_message
1703 Previously, $acl_verify_message was set only while expanding "message"
1704 and "log_message" when a very denied access.
1706 PH/28 Modified OS/os.c-Linux with
1708 -#ifndef OS_LOAD_AVERAGE
1709 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1711 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1712 nomenclature these days.)
1714 PH/29 Installed patch from the Sieve maintainer that adds the options
1715 sieve_useraddress and sieve_subaddress to the redirect router.
1717 PH/30 In these circumstances:
1718 . Two addresses routed to the same list of hosts;
1719 . First host does not offer TLS;
1720 . First host accepts first address;
1721 . First host gives temporary error to second address;
1722 . Second host offers TLS and a TLS session is established;
1723 . Second host accepts second address.
1724 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1725 and peerdn, if requested) that were in fact used only for the second
1728 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1729 attention to any local part prefix or suffix that was matched by the
1730 router that accepted the address. It now behaves in the same way as it
1731 does for delivery: the affixes are removed from the local part unless
1732 rcpt_include_affixes is set on the transport.
1734 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1735 timeout during the DATA phase of an incoming message.
1737 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1738 applied a patch sanctioned by the Sieve maintainer.
1740 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1741 the uid or gid is negative. A case of a negative gid caused this to be
1742 noticed. The fix allows for either to be negative.
1744 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1745 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1748 PH/36 The change PH/12 above was broken. Fixed it.
1750 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1751 the grounds that routing the same address twice would always produce the
1752 same answer. This might have been true once, but it is certainly no
1753 longer true now. Routing a child address may depend on the previous
1754 routing that produced that child. Some complicated redirection strategies
1755 went wrong when messages had multiple recipients, and made Exim's
1756 behaviour dependent on the order in which the addresses were given.
1758 I have moved the duplicate checking until after the routing is complete.
1759 Exim scans the addresses that are assigned to local and remote
1760 transports, and removes any duplicates. This means that more work will be
1761 done, as duplicates will always all be routed, but duplicates are
1762 presumably rare, so I don't expect this is of any significance.
1764 For deliveries to pipes, files, and autoreplies, the duplicate checking
1765 still happens during the routing process, since they are not going to be
1768 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1769 It corrects a timeout issue with spamd. This is Ian's comment: "The
1770 background is that sometimes spamd either never reads data from a
1771 connection it has accepted, or it never writes response data. The exiscan
1772 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1773 blindly assumes that writes won't block so it may never time out."
1775 PH/39 Allow G after quota size as well as K and M.
1777 PH/40 The value set for $authenticated_id in an authenticator may not contain
1778 binary zeroes or newlines because the value is written to log lines and
1779 to spool files. There was no check on this. Now the value is run through
1780 the string_printing() function so that such characters are converted to
1781 printable escape sequences.
1783 PH/41 $message_linecount is a new variable that contains the total number of
1784 lines in the message. Compare $body_linecount, which is the count for the
1787 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1788 bounce and delay warning messages, except in certain special cases, which
1791 (a) An SMTP error message from a remote host;
1792 (b) A message specified in a :fail: redirection;
1793 (c) A message specified in a "fail" command in a system filter;
1794 (d) A message specified in a FAIL return from the queryprogram router;
1795 (e) A message specified by the cannot_route_message router option.
1797 In these cases only, Exim does include the error details in bounce and
1798 warning messages. There are also a few cases where bland messages such
1799 as "unrouteable address" or "local delivery error" are given.
1801 PH/43 $value is now also set for the "else" part of a ${run expansion.
1803 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1804 being worked on, but at least Exim now implements the latest version to
1807 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1808 process to complete was treated as a delivery failure, a timeout while
1809 writing the message to the pipe was logged, but erroneously treated as a
1810 successful delivery. Such timeouts include transport filter timeouts. For
1811 consistency with the overall process timeout, these timeouts are now
1812 treated as errors, giving rise to delivery failures by default. However,
1813 there is now a new Boolean option for the pipe transport called
1814 timeout_defer, which, if set TRUE, converts the failures into defers for
1815 both kinds of timeout. A transport filter timeout is now identified in
1818 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1819 systems where "make" and "gmake" are different, calling "gmake" at top
1820 level broke things. I've arranged for the value of $(MAKE) to be passed
1821 from the Makefile to this script so that it can call the same version of
1825 A note about Exim versions 4.44 and 4.50
1826 ----------------------------------------
1828 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1829 changes of various kinds. As a consequence, a big documentation update was
1830 needed. This delayed the release for rather longer than seemed good, especially
1831 in the light of a couple of (minor) security issues. Therefore, the changes
1832 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1833 release. So 4.44 and 4.50 are in effect two different branches that both start
1836 I have left the 4.50 change log unchanged; it contains all the changes since
1837 4.43. The change log for 4.44 is below; many of its items are identical to
1838 those for 4.50. This seems to be the most sensible way to preserve the
1839 historical information.
1845 1. Minor wording change to the doc/README.SIEVE file.
1847 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1848 computation of the current number of files was incorrect.
1850 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1851 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1854 4. Give more explanation in the error message when the command for a transport
1855 filter fails to execute.
1857 5. There are several places where Exim runs a non-Exim command in a
1858 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1859 was being done only for the command run by the queryprogram router. It is
1860 now done for all such subprocesses. The other cases are: ${run, transport
1861 filters, and the commands run by the lmtp and pipe transports.
1863 6. Added CONFIGURE_GROUP build-time option.
1865 7. Some older OS have a limit of 256 on the maximum number of file
1866 descriptors. Exim was using setrlimit() to set 1000 as a large value
1867 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1868 systems. I've change it so that if it can't get 1000, it tries for 256.
1870 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1871 was an oversight, and furthermore, ever since the addition of extra
1872 controls (e.g. 4.43/32), the checks on when to allow different forms of
1873 "control" were broken. There should now be diagnostics for all cases when a
1874 control that does not make sense is encountered.
1876 9. Added the /retain_sender option to "control=submission".
1878 10. $recipients is now available in the predata ACL (oversight).
1880 11. Tidy the search cache before the fork to do a delivery from a message
1881 received from the command line. Otherwise the child will trigger a lookup
1882 failure and thereby defer the delivery if it tries to use (for example) a
1883 cached ldap connection that the parent has called unbind on.
1885 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1886 of $address_data from the recipient verification was clobbered by the
1887 sender verification.
1889 13. The value of address_data from a sender verification is now available in
1890 $sender_address_data in subsequent conditions in the ACL statement.
1892 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1894 15. Added a new option "connect=<time>" to callout options, to set a different
1897 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1898 was its contents. (It was OK if the option was not defined at all.)
1900 17. A "Completed" log line is now written for messages that are removed from
1901 the spool by the -Mrm option.
1903 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1904 information about exactly what failed.
1906 19. Added -dd to debug only the daemon process.
1908 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1909 handles timeouts, both on the server side and network timeouts. Renamed the
1910 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1912 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1913 It is now set to "smtps".
1915 22. $host_address is now set to the target address during the checking of
1916 ignore_target_hosts.
1918 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1919 being passed; this would have caused $sender_host_name to have been used if
1920 matching the list had actually called for a host name (not very likely,
1921 since this list is usually IP addresses). A host name is now passed as
1924 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1925 code that specifies a non-restarting handler (typically sigaction() in
1926 modern systems) in an attempt to fix a rare and obscure crash bug.
1928 25. Narrowed the window for a race in the daemon that could cause it to ignore
1929 SIGCHLD signals. This is not a major problem, because they are used only to
1930 wake it up if nothing else does.
1932 26. A malformed maildirsize file could cause Exim to calculate negative values
1933 for the mailbox size or file count. Odd effects could occur as a result.
1934 The maildirsize information is now recalculated if the size or filecount
1937 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1938 support for a long time. Removed HAVE_SYS_VFS_H.
1940 28. Installed the latest version of exipick from John Jetmore.
1942 29. In an address list, if the pattern was not a regular expression, an empty
1943 subject address (from a bounce message) matched only if the pattern was an
1944 empty string. Non-empty patterns were not even tested. This was the wrong
1945 because it is perfectly reasonable to use an empty address as part of a
1946 database query. An empty address is now tested by patterns that are
1947 lookups. However, all the other forms of pattern expect the subject to
1948 contain a local part and a domain, and therefore, for them, an empty
1949 address still always fails if the pattern is not itself empty.
1951 30. Exim went into a mad DNS loop when attempting to do a callout where the
1952 host was specified on an smtp transport, and looking it up yielded more
1953 than one IP address.
1955 31. Re-factored the code for checking spool and log partition space into a
1956 function that finds that data and another that does the check. The former
1957 is then used to implement four new variables: $spool_space, $log_space,
1958 $spool_inodes, and $log_inodes.
1960 32. The RFC2047 encoding function was originally intended for short strings
1961 such as real names; it was not keeping to the 75-character limit for
1962 encoded words that the RFC imposes. It now respects the limit, and
1963 generates multiple encoded words if necessary. To be on the safe side, I
1964 have increased the buffer size for the ${rfc2047: expansion operator from
1967 33. It is now permitted to omit both strings after an "if" condition; if the
1968 condition is true, the result is "true". As before, when the second string
1969 is omitted, a false condition yields an empty string. This makes it less
1970 cumbersome to write custom ACL and router conditions.
1972 34. Failure to deliver a bounce message always caused it to be frozen, even if
1973 there was an errors_to setting on the router. The errors_to setting is now
1976 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1977 canonical form (fully expanded) before being placed in
1978 $sender_host_address.
1980 36. The table in the code that translates DNS record types into text (T_A to
1981 "A" for instance) was missing entries for NS and CNAME. It is just possible
1982 that this could have caused confusion if both these types were looked up
1983 for the same domain, because the text type is used as part of Exim's
1984 per-process caching. But the chance of anyone hitting this buglet seems
1987 37. The dnsdb lookup has been extended in a number of ways.
1989 (1) There is a new type, "zns", which walks up the domain tree until it
1990 finds some nameserver records. It should be used with care.
1992 (2) There is a new type, "mxh", which is like "mx" except that it returns
1993 just the host names, not the priorities.
1995 (3) It is now possible to give a list of domains (or IP addresses) to be
1996 looked up. The behaviour when one of the lookups defers can be
1997 controlled by a keyword.
1999 (4) It is now possible to specify the separator character for use when
2000 multiple records are returned.
2002 38. The dnslists ACL condition has been extended: it is now possible to supply
2003 a list of IP addresses and/or domains to be looked up in a particular DNS
2006 39. Added log_selector=+queue_time_overall.
2008 40. When running the queue in the test harness, wait just a tad after forking a
2009 delivery process, to get repeatability of debugging output.
2011 41. Include certificate and key file names in error message when GnuTLS fails
2012 to set them up, because the GnuTLS error message doesn't include the name
2013 of the failing file when there is a problem reading it.
2015 42. Allow both -bf and -bF in the same test run.
2017 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2019 44. The "Exiscan patch" is now merged into the mainline Exim source.
2021 45. Sometimes the final signoff response after QUIT could fail to get
2022 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2023 < 0 before doing a fflush(). This bug looks as though it goes back to the
2024 introduction of TLS in release 3.20, but "sometimes" must have been rare
2025 because the tests only now provoked it.
2027 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2028 (this can affect the format of dates).
2030 47. exim_tidydb, when checking for the continued existence of a message for
2031 which it has found a message-specific retry record, was not finding
2032 messages that were in split spool directories. Consequently, it was
2033 deleting retry records that should have stayed in existence.
2035 48. Steve fixed some bugs in eximstats.
2037 49. The SPA authentication driver was not abandoning authentication and moving
2038 on to the next authenticator when an expansion was forced to fail,
2039 contradicting the general specification for all authenticators. Instead it
2040 was generating a temporary error. It now behaves as specified.
2042 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2043 (the order specifies the preference for clients). The order is now AES256,
2044 AES128, 3DES, ARCFOUR128.
2046 51. Small patch to Sieve code - explicitly set From: when generating an
2049 52. Exim crashed if a remote delivery caused a very long error message to be
2050 recorded - for instance if somebody sent an entire SpamAssassin report back
2051 as a large number of 550 error lines. This bug was coincidentally fixed by
2052 increasing the size of one of Exim's internal buffers (big_buffer) that
2053 happened as part of the Exiscan merge. However, to be on the safe side, I
2054 have made the code more robust (and fixed the comments that describe what
2057 53. Now that there can be additional text after "Completed" in log lines (if
2058 the queue_time_overall log selector is set), a one-byte patch to exigrep
2059 was needed to allow it to recognize "Completed" as not the last thing in
2062 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2063 patch that reportedly fixes this has been added. I am not expert enough to
2064 create a test for it. This is what the patch creator wrote:
2066 "I found a little strange behaviour of ldap code when working with
2067 Windows 2003 AD Domain, where users was placed in more than one
2068 Organization Units. When I tried to give exim partial DN, the exit code
2069 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2070 But simultaneously result of request was absolutely normal ldap result,
2071 so I produce this patch..."
2073 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2074 REFERENCE, so I have modified the code to exclude the patch when that macro
2077 55. Some experimental protocols are using DNS PTR records for new purposes. The
2078 keys for these records are domain names, not reversed IP addresses. The
2079 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2080 leaves it alone. Component reversal etc. now happens only for IP addresses.
2083 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2085 57. Double the size of the debug message buffer (to 2048) so that more of very
2086 long debug lines gets shown.
2088 58. The exicyclog utility now does better if the number of log files to keep
2089 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2091 59. Two changes related to the smtp_active_hostname option:
2093 (1) $smtp_active_hostname is now available as a variable.
2094 (2) The default for smtp_banner uses $smtp_active_hostname instead
2095 of $primary_hostname.
2097 60. The host_aton() function is supposed to be passed a string that is known
2098 to be a valid IP address. However, in the case of IPv6 addresses, it was
2099 not checking this. This is a hostage to fortune. Exim now panics and dies
2100 if the condition is not met. A case was found where this could be provoked
2101 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2102 components; fortuitously, this particular loophole had already been fixed
2103 by change 4.50/55 above.
2105 If there are any other similar loopholes, the new check in host_aton()
2106 itself should stop them being exploited. The report I received stated that
2107 data on the command line could provoke the exploit when Exim was running as
2108 exim, but did not say which command line option was involved. All I could
2109 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2110 running as the user.
2113 61. There was a buffer overflow vulnerability in the SPA authentication code
2114 (which came originally from the Samba project). I have added a test to the
2115 spa_base64_to_bits() function which I hope fixes it.
2118 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2119 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2121 63. The daemon start-up calls getloadavg() while still root for those OS that
2122 need the first call to be done as root, but it missed one case: when
2123 deliver_queue_load_max is set with deliver_drop_privilege. This is
2124 necessary for the benefit of the queue runner, because there is no re-exec
2125 when deliver_drop_privilege is set.
2127 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2128 This has been fixed.
2130 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2131 was in use, was not putting the data itself into the right store pool;
2132 consequently, it could be overwritten for a subsequent message in the same
2133 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2136 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2138 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2139 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2140 the function were treating the return as a boolean value, which happened to
2141 work because 0=false and not-0=true, but is not correct code.
2143 68. The host_aton() function was not handling scoped IPv6 addresses (those
2144 with, for example, "%eth0" on the end) correctly.
2146 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2147 negated items (that is, ~something) in unsigned ints. Some compilers
2148 apparently mutter when there is no cast.
2150 70. If an address verification called from an ACL failed, and did not produce a
2151 user-specific message (i.e. there was only a "system" message), nothing was
2152 put in $acl_verify_message. In this situation, it now puts the system
2155 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2156 session; change 4.31/43 added the unwanted input to the log line - except
2157 that it did not do this in the start of session case. It now does.
2159 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2160 This is wrong and can cause the other end to generate a synchronization
2161 error if it is another Exim or anything else that does the synchronization
2162 check. A QUIT command is no longer sent after a timeout.
2164 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2165 during host lookups.
2167 74. The defer_ok option of callout verification was not working if it was used
2168 when verifying addresses in header lines, that is, for this case:
2170 verify = header_sender/callout=defer_ok
2172 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2173 those file descriptors could be used for SMTP connections. If anything
2174 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2175 could be sent to the SMTP client, causing chaos. The daemon now opens
2176 stdin, stdout, and stderr to /dev/null when it puts itself into the
2179 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2180 log by default. The user can override this with suitable Perl magic.
2182 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2183 the log message when discard triggers, was not working for the DATA ACL or
2184 for the non-SMTP ACL.
2186 78. Error message wording change in sieve.c.
2188 79. If smtp_accept_max_per_host was set, the number of connections could be
2189 restricted to fewer than expected, because the daemon was trying to set up
2190 a new connection before checking whether the processes handling previous
2191 connections had finished. The check for completed processes is now done
2192 earlier. On busy systems, this bug wouldn't be noticed because something
2193 else would have woken the daemon, and it would have reaped the completed
2196 80. If a message was submitted locally by a user whose login name contained one
2197 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2198 It caused a spool format error. I have fixed the spool reading code. A
2199 related problem was that the "from" clause in the Received: line became
2200 illegal because of the space(s). It is now covered by ${quote_local_part.
2202 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2205 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2207 83. Patch from Sieve maintainer to fix unterminated string problem in
2208 "vacation" handling.
2210 84. Some minor changes to the Linux configuration files to help with other
2211 OS variants using glibc.
2213 85. One more patch for Sieve to update vacation handling to latest spec.
2216 ----------------------------------------------------
2217 See the note above about the 4.44 and 4.50 releases.
2218 ----------------------------------------------------
2224 1. Change 4.43/35 introduced a bug that caused file counts to be
2225 incorrectly computed when quota_filecount was set in an appendfile
2228 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2229 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2232 3. Give more explanation in the error message when the command for a transport
2233 filter fails to execute.
2235 4. There are several places where Exim runs a non-Exim command in a
2236 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2237 was being done only for the command run by the queryprogram router. It is
2238 now done for all such subprocesses. The other cases are: ${run, transport
2239 filters, and the commands run by the lmtp and pipe transports.
2241 5. Some older OS have a limit of 256 on the maximum number of file
2242 descriptors. Exim was using setrlimit() to set 1000 as a large value
2243 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2244 systems. I've change it so that if it can't get 1000, it tries for 256.
2246 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2247 was an oversight, and furthermore, ever since the addition of extra
2248 controls (e.g. 4.43/32), the checks on when to allow different forms of
2249 "control" were broken. There should now be diagnostics for all cases when a
2250 control that does not make sense is encountered.
2252 7. $recipients is now available in the predata ACL (oversight).
2254 8. Tidy the search cache before the fork to do a delivery from a message
2255 received from the command line. Otherwise the child will trigger a lookup
2256 failure and thereby defer the delivery if it tries to use (for example) a
2257 cached ldap connection that the parent has called unbind on.
2259 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2260 of $address_data from the recipient verification was clobbered by the
2261 sender verification.
2263 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2264 was its contents. (It was OK if the option was not defined at all.)
2266 11. A "Completed" log line is now written for messages that are removed from
2267 the spool by the -Mrm option.
2269 12. $host_address is now set to the target address during the checking of
2270 ignore_target_hosts.
2272 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2273 being passed; this would have caused $sender_host_name to have been used if
2274 matching the list had actually called for a host name (not very likely,
2275 since this list is usually IP addresses). A host name is now passed as
2278 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2279 code that specifies a non-restarting handler (typically sigaction() in
2280 modern systems) in an attempt to fix a rare and obscure crash bug.
2282 15. Narrowed the window for a race in the daemon that could cause it to ignore
2283 SIGCHLD signals. This is not a major problem, because they are used only to
2284 wake it up if nothing else does.
2286 16. A malformed maildirsize file could cause Exim to calculate negative values
2287 for the mailbox size or file count. Odd effects could occur as a result.
2288 The maildirsize information is now recalculated if the size or filecount
2291 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2292 support for a long time. Removed HAVE_SYS_VFS_H.
2294 18. Updated exipick to current release from John Jetmore.
2296 19. Allow an empty sender to be matched against a lookup in an address list.
2297 Previously the only cases considered were a regular expression, or an
2300 20. Exim went into a mad DNS lookup loop when doing a callout where the
2301 host was specified on the transport, if the DNS lookup yielded more than
2304 21. The RFC2047 encoding function was originally intended for short strings
2305 such as real names; it was not keeping to the 75-character limit for
2306 encoded words that the RFC imposes. It now respects the limit, and
2307 generates multiple encoded words if necessary. To be on the safe side, I
2308 have increased the buffer size for the ${rfc2047: expansion operator from
2311 22. Failure to deliver a bounce message always caused it to be frozen, even if
2312 there was an errors_to setting on the router. The errors_to setting is now
2315 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2316 canonical form (fully expanded) before being placed in
2317 $sender_host_address.
2319 24. Updated eximstats to version 1.33
2321 25. Include certificate and key file names in error message when GnuTLS fails
2322 to set them up, because the GnuTLS error message doesn't include the name
2323 of the failing file when there is a problem reading it.
2325 26. Expand error message when OpenSSL has problems setting up cert/key files.
2328 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2329 (this can affect the format of dates).
2331 28. exim_tidydb, when checking for the continued existence of a message for
2332 which it has found a message-specific retry record, was not finding
2333 messages that were in split spool directories. Consequently, it was
2334 deleting retry records that should have stayed in existence.
2336 29. eximstats updated to version 1.35
2337 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2338 1.35 - bugfix such that pie charts by volume are generated correctly
2340 30. The SPA authentication driver was not abandoning authentication and moving
2341 on to the next authenticator when an expansion was forced to fail,
2342 contradicting the general specification for all authenticators. Instead it
2343 was generating a temporary error. It now behaves as specified.
2345 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2346 (the order specifies the preference for clients). The order is now AES256,
2347 AES128, 3DES, ARCFOUR128.
2349 31. Small patch to Sieve code - explicitly set From: when generating an
2352 32. Exim crashed if a remote delivery caused a very long error message to be
2353 recorded - for instance if somebody sent an entire SpamAssassin report back
2354 as a large number of 550 error lines. This bug was coincidentally fixed by
2355 increasing the size of one of Exim's internal buffers (big_buffer) that
2356 happened as part of the Exiscan merge. However, to be on the safe side, I
2357 have made the code more robust (and fixed the comments that describe what
2360 33. Some experimental protocols are using DNS PTR records for new purposes. The
2361 keys for these records are domain names, not reversed IP addresses. The
2362 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2363 leaves it alone. Component reversal etc. now happens only for IP addresses.
2366 34. The host_aton() function is supposed to be passed a string that is known
2367 to be a valid IP address. However, in the case of IPv6 addresses, it was
2368 not checking this. This is a hostage to fortune. Exim now panics and dies
2369 if the condition is not met. A case was found where this could be provoked
2370 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2371 components; fortuitously, this particular loophole had already been fixed
2372 by change 4.50/55 or 4.44/33 above.
2374 If there are any other similar loopholes, the new check in host_aton()
2375 itself should stop them being exploited. The report I received stated that
2376 data on the command line could provoke the exploit when Exim was running as
2377 exim, but did not say which command line option was involved. All I could
2378 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2379 running as the user.
2382 35. There was a buffer overflow vulnerability in the SPA authentication code
2383 (which came originally from the Samba project). I have added a test to the
2384 spa_base64_to_bits() function which I hope fixes it.
2387 36. The daemon start-up calls getloadavg() while still root for those OS that
2388 need the first call to be done as root, but it missed one case: when
2389 deliver_queue_load_max is set with deliver_drop_privilege. This is
2390 necessary for the benefit of the queue runner, because there is no re-exec
2391 when deliver_drop_privilege is set.
2393 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2394 was in use, was not putting the data itself into the right store pool;
2395 consequently, it could be overwritten for a subsequent message in the same
2396 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2399 38. Sometimes the final signoff response after QUIT could fail to get
2400 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2401 < 0 before doing a fflush(). This bug looks as though it goes back to the
2402 introduction of TLS in release 3.20, but "sometimes" must have been rare
2403 because the tests only now provoked it.
2409 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2410 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2411 Now it returns an integer. A number of calls were still expecting a T/F
2412 return. Fortuitously, in all cases, the tests worked in OK situations,
2413 which is the norm. However, things would have gone wrong on any write
2414 failures on the smtp file descriptor. This function is used when sending
2415 messages over SMTP and also when doing verify callouts.
2417 2. When Exim is called to do synchronous delivery of a locally submitted
2418 message (the -odf or -odi options), it no longer closes stderr before doing
2421 3. Implemented the mua_wrapper option.
2423 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2425 5. Implemented the functions header_remove(), header_testname(),
2426 header_add_at_position(), and receive_remove_recipient(), and exported them
2429 6. If an ACL "warn" statement specified the addition of headers, Exim already
2430 inserted X-ACL-Warn: at the start if there was no header name. However, it
2431 was not making this test for the second and subsequent header lines if
2432 there were newlines in the string. This meant that an invalid header could
2433 be inserted if Exim was badly configured.
2435 7. Allow an ACL "warn" statement to add header lines at the start or after all
2436 the Received: headers, as well as at the end.
2438 8. Added the rcpt_4xx retry error code.
2440 9. Added postmaster_mailfrom=xxx to callout verification option.
2442 10. Added mailfrom=xxxx to the callout verification option, for verify=
2445 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2446 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2448 12. Inserted some casts to stop certain compilers warning when using pointer
2449 differences as field lengths or precisions in printf-type calls (mostly
2450 affecting debugging statements).
2452 13. Added optional readline() support for -be (dynamically loaded).
2454 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2455 same clock tick as a message's arrival, so that its received time was the
2456 same as the "first fail" time on the retry record, and that message
2457 remained on the queue past the ultimate address timeout, every queue runner
2458 would try a delivery (because it was past the ultimate address timeout) but
2459 after another failure, the ultimate address timeout, which should have then
2460 bounced the address, did not kick in. This was a "< instead of <=" error;
2461 in most cases the first failure would have been in the next clock tick
2462 after the received time, and all would be well.
2464 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2465 being recognized when the domain list was tested by the match_domain
2466 condition in an expansion string.
2468 16. Added the ${str2b64: operator.
2470 17. Exim was always calling setrlimit() to set a large limit for the number of
2471 processes, without checking whether the existing limit was already
2472 adequate. (It did check for the limit on file descriptors.) Furthermore,
2473 errors from getrlimit() and setrlimit() were being ignored. Now they are
2474 logged to the main and panic logs, but Exim does carry on, to try to do its
2475 job under whatever limits there are.
2477 18. Imported PCRE 5.0.
2479 19. Trivial typo in log message " temporarily refused connection" (the leading
2482 20. If the log selector return_path_on_delivery was set and an address was
2483 redirected to /dev/null, the delivery process crashed because it assumed
2484 that a return path would always be set for a "successful" delivery. In this
2485 case, the whole delivery is bypassed as an optimization, and therefore no
2488 21. Internal re-arrangement: the function for sending a challenge and reading
2489 a response while authentication was assuming a zero-terminated challenge
2490 string. It's now changed to take a pointer and a length, to allow for
2491 binary data in such strings.
2493 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2495 23. Exim was not respecting finduser_retries when seeking the login of the
2496 uid under which it was called; it was always trying 10 times. (The default
2497 setting of finduser_retries is zero.) Also, it was sleeping after the final
2498 failure, which is pointless.
2500 24. Implemented tls_on_connect_ports.
2502 25. Implemented acl_smtp_predata.
2504 26. If the domain in control=submission is set empty, Exim assumes that the
2505 authenticated id is a complete email address when it generates From: or
2506 Sender: header lines.
2508 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2509 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2510 chown and chgrp in /bin and hostname in /usr/bin.
2512 28. Exim was keeping the "process log" file open after each use, just as it
2513 does for the main log. This opens the possibility of it remaining open for
2514 long periods when the USR1 signal hits a daemon. Occasional processlog
2515 errors were reported, that could have been caused by this. Anyway, it seems
2516 much more sensible not to leave this file open at all, so that is what now
2519 29. The long-running daemon process does not normally write to the log once it
2520 has entered its main loop, and it closes the log before doing so. This is
2521 so that log files can straightforwardly be renamed and moved. However,
2522 there are a couple of unusual error situations where the daemon does write
2523 log entries, and I had neglected to close the log afterwards.
2525 30. The text of an SMTP error response that was received during a remote
2526 delivery was being truncated at 512 bytes. This is too short for some of
2527 the long messages that one sometimes sees. I've increased the limit to
2530 31. It is now possible to make retry rules that apply only when a message has a
2531 specific sender, in particular, an empty sender.
2533 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2534 it possible to be selective about when SMTP synchronization is enforced.
2536 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2538 32. Implemented hosts_connection_nolog.
2540 33. Added an ACL for QUIT.
2542 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2545 35. Added mailbox_size and mailbox_filecount to appendfile.
2547 36. Added control = no_multiline_responses to ACLs.
2549 37. There was a bug in the logic of the code that waits for the clock to tick
2550 in the case where the clock went backwards by a substantial amount such
2551 that the microsecond fraction of "now" was more than the microsecond
2552 fraction of "then" (but the whole seconds number was less).
2554 38. Added support for the libradius Radius client library this is found on
2555 FreeBSD (previously only the radiusclient library was supported).
2561 1. When certain lookups returned multiple values in the form name=value, the
2562 quoting of the values was not always being done properly. Specifically:
2563 (a) If the value started with a double quote, but contained no whitespace,
2565 (b) If the value contained whitespace other than a space character (i.e.
2566 tabs or newlines or carriage returns) it was not quoted.
2567 This fix has been applied to the mysql and pgsql lookups by writing a
2568 separate quoting function and calling it from the lookup code. The fix
2569 should probably also be applied to nisplus, ibase and oracle lookups, but
2570 since I cannot test any of those, I have not disturbed their existing code.
2572 2. A hit in the callout cache for a specific address caused a log line with no
2573 reason for rejecting RCPT. Now it says "Previous (cached) callout
2574 verification failure".
2576 3. There was an off-by-one bug in the queryprogram router. An over-long
2577 return line was truncated at 256 instead of 255 characters, thereby
2578 overflowing its buffer with the terminating zero. As well as fixing this, I
2579 have increased the buffer size to 1024 (and made a note to document this).
2581 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2582 when Exim is waiting for an SMTP response from a remote server, Exim
2583 restarts its select() call on the socket, thereby resetting its timeout.
2584 This is not a problem when such interrupts are rare. Somebody set up a cron
2585 job to run exiwhat every 2 minutes, which is less than the normal select()
2586 timeout (5 or 10 minutes). This meant that the select() timeout never
2587 kicked in because it was always reset. I have fixed this by comparing the
2588 time when an interrupt arrives with the time at the start of the first call
2589 to select(). If more time than the timeout has elapsed, the interrupt is
2590 treated as a timeout.
2592 5. Some internal re-factoring in preparation for the addition of Sieve
2593 extensions (by MH). In particular, the "personal" test is moved to a
2594 separate function, and given an option for scanning Cc: and Bcc: (which is
2595 not set for Exim filters).
2597 6. When Exim created an email address using the login of the caller as the
2598 local part (e.g. when creating a From: or Sender: header line), it was not
2599 quoting the local part when it contained special characters such as @.
2601 7. Installed new OpenBSD configuration files.
2603 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2604 try to make them clearer.
2606 9. Callout options, other than the timeout value, were being ignored when
2607 verifying sender addresses in header lines. For example, when using
2609 verify = header_sender/callout=no_cache
2611 the cache was (incorrectly) being used.
2613 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2614 only the Cygwin environment.
2616 11. When return_path_on_delivery was set as a log selector, if different remote
2617 addresses in the same message used different return paths and parallel
2618 remote delivery occurred, the wrong values would sometimes be logged.
2619 (Whenever a remote delivery process finished, the return path value from
2620 the most recently started remote delivery process was logged.)
2622 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2623 lines when AUTH and/or TLS are in use. This is the "received protocol"
2624 field. Exim used to use "asmtp" for authenticated SMTP, without any
2625 indication (in the protocol name) for TLS use. Now it follows the RFC and
2626 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2627 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2628 names appear in log lines as well as in Received: header lines.
2630 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2631 extensions, and comparison tests, and to fix some bugs.
2633 14. Changes to the "personal" filter test:
2635 (1) The test was buggy in that it was just doing the equivalent of
2636 "contains" tests on header lines. For example, if a user's address was
2637 anne@some.where, the "personal" test would incorrectly be true for
2639 To: susanne@some.where
2641 This test is now done by extracting each address from the header in turn,
2642 and checking the entire address. Other tests that are part of "personal"
2643 are now done using regular expressions (for example, to check local parts
2644 of addresses in From: header lines).
2646 (2) The list of non-personal local parts in From: addresses has been
2647 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2648 taken from the Sieve specification recommendations.
2650 (3) If the message contains any header line starting with "List-" it is
2651 treated as non-personal.
2653 (4) The test for "circular" in the Subject: header line has been removed
2654 because it now seems ill-conceived.
2656 15. Minor typos in src/EDITME comments corrected.
2658 16. Installed latest exipick from John Jetmore.
2660 17. If headers_add on a router specified a text string that was too long for
2661 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2662 of string_sprintf() is now avoided.
2664 18. $message_body_size was not set (it was always zero) when running the DATA
2665 ACL and the local_scan() function.
2667 19. For the "mail" command in an Exim filter, no default was being set for
2668 the once_repeat time, causing a random time value to be used if "once" was
2669 specified. (If the value happened to be <= 0, no repeat happened.) The
2670 default is now 0s, meaning "never repeat". The "vacation" command was OK
2671 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2672 (I found it when inspecting the code).
2674 20. There is now an overall timeout for performing a callout verification. It
2675 defaults to 4 times the callout timeout, which applies to individual SMTP
2676 commands during the callout. The overall timeout applies when there is more
2677 than one host that can be tried. The timeout is checked before trying the
2678 next host. This prevents very long delays if there are a large number of
2679 hosts and all are timing out (e.g. when the network connections are timing
2680 out). The value of the overall timeout can be changed by specifying an
2681 additional sub-option for "callout", called "maxwait". For example:
2683 verify = sender/callout=5s,maxwait=20s
2685 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2686 to the end before writing, but this should make it even safer).
2688 22. Exim was forgetting that it had advertised PIPELINING for the second and
2689 subsequent messages on an SMTP connection. It was also not resetting its
2690 memory on STARTTLS and an internal HELO.
2692 23. When Exim logs an SMTP synchronization error within a session, it now
2693 records whether PIPELINING has been advertised or not.
2695 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2696 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2697 rather than long int.
2699 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2701 26. Added the never_mail option to autoreply.
2707 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2708 crash if the getsockname() call failed; this can happen if a connection is
2709 closed very soon after it is established. The problem was simply in the
2710 order in which certain operations were done, causing Exim to try to write
2711 to the SMTP stream before it had set up the file descriptor. The bug has
2712 been fixed by making things happen in the correct order.
2718 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2719 before the connection was closed, thus losing the rejection response.
2721 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2722 some early Solaris releases, but causes trouble in current releases where
2723 socklen_t is defined.
2725 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2728 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2731 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2732 that releasing the top of it at the end releases what was used for sub-
2733 expansions (unless the block got too big). However, discard this block if
2734 the first thing is a variable or header, so that we can use its block when
2735 it is dynamic (useful for very large $message_headers, for example).
2737 6. Lookups now cache *every* query, not just the most recent. A new, separate
2738 store pool is used for this. It can be recovered when all lookup caches are
2739 flushed. Lookups now release memory at the end of their result strings.
2740 This has involved some general refactoring of the lookup sources.
2742 7. Some code has been added to the store_xxx() functions to reduce the amount
2743 of flapping under certain conditions.
2745 8. log_incoming_interface used to affect only the <= reception log lines. Now
2746 it causes the local interface and port to be added to several more SMTP log
2747 lines, for example "SMTP connection from", and rejection lines.
2749 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2751 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2753 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2754 could be overwritten at the end of the current message (or the start of a
2755 new message if it was set in a HELO ACL). The value is now preserved for
2756 the duration of the SMTP connection.
2758 12. If a transport had a headers_rewrite setting, and a matching header line
2759 contained an unqualified address, that address was qualified, even if it
2760 did not match any rewriting rules. The underlying bug was that the values
2761 of the flags that permit the existence of unqualified sender and recipient
2762 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2763 non-local messages, and by -bnq for local messages) were not being
2764 preserved with the message after it was received.
2766 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2767 "next input=" as part of the text comprising the host identity instead of
2768 the correct text. The code was using the same buffer for two different
2769 strings. However, depending on which order the printing function evaluated
2770 its arguments, the bug did not always show up. Under Linux, for example, my
2771 test suite worked just fine.
2773 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2774 doesn't work with some older versions of Perl. It has been changed to "my",
2775 which in any case is probably the better facility to use.
2777 15. A really picky compiler found some instances of statements for creating
2778 error messages that either had too many or two few arguments for the format
2781 16. The size of the buffer for calls to the DNS resolver has been increased
2782 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2783 for addresses that have a lot of PTR records. This alleviates a problem; it
2784 does not fully solve it.
2786 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2787 buffer now truncates the list and logs the incident, which is the same
2788 action as happens when Exim is looking up a host name and its aliases.
2789 Previously in this situation something unpredictable would happen;
2790 sometimes it was "internal error: store_reset failed".
2792 18. If a server dropped the connection unexpectedly when an Exim client was
2793 using GnuTLS and trying to read a response, the client delivery process
2794 crashed while trying to generate an error log message.
2796 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2797 string, for example:
2799 warn message = H1: something\nH2: something
2801 the text was added as a single header line from Exim's point of view
2802 though it ended up OK in the delivered message. However, searching for the
2803 second and subsequent header lines using $h_h2: did not work. This has been
2804 fixed. Similarly, if a system filter added multiple headers in this way,
2805 the routers could not see them.
2807 20. Expanded the error message when iplsearch is called with an invalid key to
2808 suggest using net-iplsearch in a host list.
2810 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2811 ACLs are no longer actually imposed (and a message to that effect is
2814 22. If a "gecos" field in a passwd entry contained escaped characters, in
2815 particular, if it contained a \" sequence, Exim got it wrong when building
2816 a From: or a Sender: header from that name. A second bug also caused
2817 incorrect handling when an unquoted " was present following a character
2818 that needed quoting.
2820 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2821 was not being matched caselessly.
2823 24. Arranged for all hyphens in the exim.8 source to be escaped with
2826 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2827 properly. Recipient callout cache records were still being keyed to include
2828 the sender, even when use_sender was set false. This led to far more
2829 callouts that were necessary. The sender is no longer included in the key
2830 when use_sender is false.
2832 26. Added "control = submission" modifier to ACLs.
2834 27. Added the ${base62d: operator to decode base 62 numbers.
2836 28. dnsdb lookups can now access SRV records.
2838 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2839 the configuration file.
2841 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2842 (-v) mode. This makes the output for a verbose queue run more intelligible.
2844 31. Added a use_postmaster feature to recipient callouts.
2846 32. Added the $body_zerocount variable, containing the number of binary zero
2847 bytes in the message body.
2849 33. The time of last modification of the "new" subdirectory is now used as the
2850 "mailbox time last read" when there is a quota error for a maildir
2853 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2855 35. Added +ignore_unknown as a special item in host lists.
2857 36. Code for decoding IPv6 addresses in host lists is now included, even if
2858 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2859 address was recognized as an IP address, but was then not correctly decoded
2860 into binary, causing unexpected and incorrect effects when compared with
2867 1. Very minor rewording of debugging text in manualroute to say "list of
2868 hosts" instead of "hostlist".
2870 2. If verify=header_syntax was set, and a header line with an unqualified
2871 address (no domain) and a large number of spaces between the end of the
2872 name and the colon was received, the reception process suffered a buffer
2873 overflow, and (when I tested it) crashed. This was caused by some obsolete
2874 code that should have been removed. The fix is to remove it!
2876 3. When running in the test harness, delay a bit after writing a bounce
2877 message to get a bit more predictability in the log output.
2879 4. Added a call to search_tidyup() just before forking a reception process. In
2880 theory, someone could use a lookup in the expansion of smtp_accept_max_
2881 per_host which, without the tidyup, could leave open a database connection.
2883 5. Added the variables $recipient_data and $sender_data which get set from a
2884 lookup success in an ACL "recipients" or "senders" condition, or a router
2885 "senders" option, similar to $domain_data and $local_part_data.
2887 6. Moved the writing of debug_print from before to after the "senders" test
2890 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2891 problems for message scanning, either using a data ACL, or using
2892 local_scan() because the Received: header was not generated till after they
2893 were called (in order to set the time as the time of reception completion).
2894 I have revised the way this works. The header is now generated after the
2895 body is received, but before the ACL or local_scan() are called. After they
2896 are run, the timestamp in the header is updated.
2902 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2903 before starting a queue runner without re-exec. This happened only when
2904 deliver_drop_privilege was set or when the Exim user was set to root. The
2905 effect of the bug was that timeouts during subsequent deliveries caused
2906 crashes instead of being properly handled. The handler is now left at its
2907 default (and expected) setting.
2909 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2910 message, again when deliver_drop_privilege is set or Exim is run as root.
2911 The bug described in (1) was not present in this case, but the tidying up
2912 of the other signals was missing. I have made the two cases consistent.
2914 3. The ignore_target_hosts setting on a manualroute router was being ignored
2915 for hosts that were looked up using the /MX notation.
2917 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2920 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2921 operated on the sender address. After changing the $sender_address to <>
2922 for the sender address verify, Exim was re-instated it as the original
2923 (before rewriting) address, but remembering that it had rewritten it, so it
2924 wasn't rewriting it again. This bug also had the effect of breaking the
2925 sender address verification caching when the sender address was rewritten.
2927 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2928 This has been changed so that if the ip literal address matches
2929 ignore_target_hosts, the router declines.
2931 7. Added expansion conditions match_domain, match_address, and match_local_
2932 part (NOT match_host).
2934 8. The placeholder for the Received: header didn't have a length field set.
2936 9. Added code to Exim itself and to exim_lock to test for a specific race
2937 condition that could lead to file corruption when using MBX delivery. The
2938 issue is with the lockfile that is created in /tmp. If this file is removed
2939 after a process has opened it but before that process has acquired a lock,
2940 there is the potential for a second process to recreate the file and also
2941 acquire a lock. This could lead to two Exim processes writing to the file
2942 at the same time. The added code performs the same test as UW imapd; it
2943 checks after acquiring the lock that its file descriptor still refers to
2944 the same named file.
2946 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2947 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2950 11. Added the smtp_active_hostname option. If used, this will typically be made
2951 to depend on the incoming interface address. Because $interface_address is
2952 not set up until the daemon has forked a reception process, error responses
2953 that can happen earlier (such as "too many connections") no longer contain
2956 12. If an expansion in a condition on a "warn" statement fails because a lookup
2957 defers, the "warn" statement is abandoned, and the next ACL statement is
2958 processed. Previously this caused the whole ACL to be aborted.
2960 13. Added the iplsearch lookup type.
2962 14. Added ident_timeout as a log selector.
2964 15. Added tls_certificate_verified as a log selector.
2966 16. Added a global option tls_require_ciphers (compare the smtp transport
2967 option of the same name). This controls incoming TLS connections.
2969 17. I finally figured out how to make tls_require_ciphers do a similar thing
2970 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2971 before starting the TLS session.
2973 18. Tabs are now shown as \t in -bP output.
2975 19. If the log selector return_path_on_delivery was set, Exim crashed when
2976 bouncing a message because it had too many Received: header lines.
2978 20. If two routers both had headers_remove settings, and the first one included
2979 a superfluous trailing colon, the final name in the first list and the
2980 first name in the second list were incorrectly joined into one item (with a
2981 colon in the middle).
2987 1. Added -C and -D options to the exinext utility, mainly to make it easier
2988 to include in the automated testing, but these could be helpful when
2989 multiple configurations are in use.
2991 2. The exinext utility was not formatting the output nicely when there was
2992 an alternate port involved in the retry record key, nor when there was a
2993 message id as well (for retries that were specific to a specific message
2994 and a specific host). It was also confused by IPv6 addresses, because of
2995 the additional colons they contain. I have fixed the IPv4 problem, and
2996 patched it up to do a reasonable job for IPv6.
2998 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2999 delivery, the log line now contains "pipelined" if PIPELINING was used.
3001 4. An SMTP transport process used to panic and die if the bind() call to set
3002 an explicit outgoing interface failed. This has been changed; it is now
3003 treated in the same way as a connect() failure.
3005 5. A reference to $sender_host_name in the part of a conditional expansion
3006 that was being skipped was still causing a DNS lookup. This no longer
3009 6. The def: expansion condition was not recognizing references to header lines
3010 that used bh_ and bheader_.
3012 7. Added the _cache feature to named lists.
3014 8. The code for checking quota_filecount in the appendfile transport was
3015 allowing one more file than it should have been.
3017 9. For compatibility with Sendmail, the command line option
3025 and sets the incoming protocol and host name (for trusted callers). The
3026 host name and its colon can be omitted when only the protocol is to be set.
3027 Note the Exim already has two private options, -pd and -ps, that refer to
3028 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3029 "s", but I don't think that's a major issue.
3031 10. A number of refactoring changes to the code, none of which should affect
3034 (a) The number of logging options was getting close to filling up the
3035 32-bit word that was used as a bit map. I have split them into two classes:
3036 those that are passed in the argument to log_write(), and those that are
3037 only ever tested independently outside of that function. These are now in
3038 separate 32-bit words, so there is plenty of room for expansion again.
3039 There is no change in the user interface or the logging behaviour.
3041 (b) When building, for example, log lines, the code previously used a
3042 macro that called string_cat() twice, in order to add two strings. This is
3043 not really sufficiently general. Furthermore, there was one instance where
3044 it was actually wrong because one of the argument was used twice, and in
3045 one call a function was used. (As it happened, calling the function twice
3046 did not affect the overall behaviour.) The macro has been replaced by a
3047 function that can join an arbitrary number of extra strings onto a growing
3050 (c) The code for expansion conditions now uses a table and a binary chop
3051 instead of a serial search (which was left over from when there were very
3052 few conditions). Also, it now recognizes conditions like "pam" even when
3053 the relevant support is not compiled in: a suitably worded error message is
3054 given if an attempt is made to use such a condition.
3056 11. Added ${time_interval:xxxxx}.
3058 12. A bug was causing one of the ddress fields not to be passed back correctly
3059 from remote delivery subprocesses. The field in question was not being
3060 subsequently used, so this caused to problems in practice.
3062 13. Added new log selectors queue_time and deliver_time.
3064 14. Might have fixed a bug in maildirsizefile handling that threw up
3065 "unexpected character" debug warnings, and recalculated the data
3066 unnecessarily. In any case, I expanded the warning message to give more
3069 15. Added the message "Restricted characters in address" to the statements in
3070 the default ACL that block characters like @ and % in local parts.
3072 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3073 Three changes have been made:
3075 (a) There was a serious bug; a negative response to MAIL caused the whole
3076 recipient domain to be cached as invalid, thereby blocking all messages
3077 to all local parts at the same domain, from all senders. This bug has
3078 been fixed. The domain is no longer cached after a negative response to
3079 MAIL if the sender used is not empty.
3081 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3084 (c) A new callout option, "use_sender" has been added for people who want
3085 the modified behaviour.
3091 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3094 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3095 indeed breaks things for older releases.
3097 3. Added additional logging to the case where there is a problem reading data
3098 from a filter that is running in a subprocess using a pipe, in order to
3099 try to track down a specific problem.
3101 4. Testing facility fudge: when running in the test harness and attempting
3102 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3103 getting "No route to host". Convert this to a timeout.
3105 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3108 6. Some OS don't have socklen_t but use size_t instead. This affects the
3109 fifth argument of getsockopt() amongst other things. This is now
3110 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3111 can be set for individual OS. I have set it for SunOS5, OSF1, and
3112 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3113 some earlier ones do not.
3115 7. Change 4.30/15 was not doing the test caselessly.
3117 8. The standard form for an IPv6 address literal was being rejected by address
3118 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3119 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3120 this, as well as the form without the "IPv6" on the front (but only when
3121 address literals are enabled, of course).
3123 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3125 10. Exim crashed if a message with an empty sender address specified by -f
3126 encountered a router with an errors_to setting. This could be provoked only
3127 by a command such as
3131 where an empty string was supplied; "<>" did not hit this bug.
3133 11. Installed PCRE release 4.5.
3135 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3136 remained set. It is now erased.
3138 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3139 times from message ids (which are base 36 rather than the normal 62).
3141 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3142 were being counted as actual protocol errors, and logged if the log
3143 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3144 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3145 and DATA following a set of rejected RCPTs do not count as protocol errors.
3146 In other words, Exim assumes they were pipelined, though this may not
3147 actually be the case. Of course, in all cases the client gets an
3148 appropriate error code.
3150 15. If a lookup fails in an ACL condition, a message about the failure may
3151 be available; it is used if testing the ACL cannot continue, because most
3152 such messages specify what the cause of the deferral is. However, some
3153 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3154 that caused an old message to be retained and used if a later statement
3155 caused a defer, replacing the real cause of the deferral.
3157 16. If an IP address had so many PTR records that the DNS lookup buffer
3158 was not large enough to hold them, Exim could crash while trying to process
3159 the truncated data. It now detects and logs this case.
3161 17. Further to 4.21/58, another change has been made: if (and only if) the
3162 first line of a message (the first header line) ends with CRLF, a bare LF
3163 in a subsequent header line has a space inserted after it, so as not to
3164 terminate the header.
3166 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3167 unnecessarily, used atoi() instead of strtol(), and didn't check the
3168 termination when getting file sizes from file names by regex.
3170 19. Completely re-implemented the support for maildirsize files, in the light
3171 of a number of problems with the previous contributed implementation
3172 (4.30/29). In particular:
3174 . If the quota is zero, the maildirsize file is maintained, but no quota is
3177 . If the maildir directory does not exist, it is created before any attempt
3178 to write a maildirsize file.
3180 . The quota value in the file is just a cache; if the quota is changed in
3181 the transport, the new value overrides.
3183 . A regular expression is available for excluding directories from the
3186 20. The autoreply transport checks the characters in options that define the
3187 message's headers; it allows continued headers, but it was checking with
3188 isspace() after an embedded newline instead of explicitly looking for a
3191 21. If all the "regular" hosts to which an address was routed had passed their
3192 expiry times, and had not reached their retry times, the address was
3193 bounced, even if fallback hosts were defined. Now Exim should go on to try
3196 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3197 equivalent code in the SMTP transport. Some hosts send humungous responses
3198 to HELO/EHLO, more than 1024 it seems.
3200 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3201 gives compiler warnings in some environments. I've now done it "properly",
3204 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3205 (because of problems with the built-in one) was declared to return uschar *
3206 instead of char *, causing compiler failure.
3208 25. Fixed a file descriptor leak when processing alias/forward files.
3210 26. Fixed a minor format string issue in dbfn.c.
3212 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3214 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3215 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3218 29. When a sender address is verified, it is cached, to save repeating the test
3219 when there is more than one recipient in a message. However, when the
3220 verification involves a callout, it is possible for different callout
3221 options to be set for different recipients. It is too complicated to keep
3222 track of this in the cache, so now Exim always runs a verification when a
3223 callout is required, relying on the callout cache for the optimization.
3224 The overhead is duplication of the address routing, but this should not be
3227 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3228 to be verified with callout=postmaster, and the main callout worked but the
3229 postmaster check failed, the verification correctly failed. However, if a
3230 subsequent RCPT command asked for sender verification *without* the
3231 postmaster check, incorrect caching caused this verification also to fail,
3234 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3235 it was not caching the DNS options (qualify_single, search_parents) that
3236 were used when the lookup failed. A subsequent lookup with different
3237 options therefore always gave the same answer, though there were cases
3238 where it should not have. (Example: a "domains = !$mx_any" option on a
3239 dnslookup router: the "domains" option is always processed without any
3240 widening, but the router might have qualify_single set.) Now Exim uses the
3241 cached value only when the same options are set.
3243 32. Added John Jetmore's "exipick" utility to the distribution.
3245 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3246 than a timeout (e.g. a certificate is required, and is not provided), an
3247 Exim server now closes the connection immediately. Previously it waited for
3248 the client to close - but if the client is SSL, it seems that they each
3249 wait for each other, leading to a delay before one of them times out.
3251 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3252 maintained 0.8.x compatibility because I don't think many are using it, and
3253 it is clearly obsolete.
3255 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3258 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3259 client certificate was expired. A simple patch fixes this, though I don't
3260 understand the full logic of why the verify callback is called multiple
3263 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3264 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3265 which causes problems with some clients (such as the Certicom SSL Plus
3266 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3267 disables the coutermeasure allowing Eudora to connect."
3269 38. Exim was not checking that a write() to a log file succeeded. This could
3270 lead to Bad Things if a log got too big, in particular if it hit a file
3271 size limit. Exim now panics and dies if it cannot write to a log file, just
3272 as it does if it cannot open a log file.
3274 39. Modified OS/Makefile-Linux so that it now contains
3276 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3278 The two -D definitions ensure that Exim is compiled with large file
3279 support, which makes it possible to handle log files that are bigger than
3282 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3283 instance) a domain was checked against a named list that involved a lookup,
3284 causing $domain_data to be set, then another domain was checked against the
3285 same list, then the first domain was re-checked, the value of $domain_data
3286 after the final check could be wrong. In particular, if the second check
3287 failed, it could be set empty. This bug probably also applied to
3290 41. The strip_trailing_dot option was not being applied to the address given
3291 with the -f command-line option.
3293 42. The code for reading a message's header from the spool was incrementing
3294 $received_count, but never initializing it. This meant that the value was
3295 incorrect (doubled) while delivering a message in the same process in which
3296 it was received. In the most common configuration of Exim, this never
3297 happens - a fresh exec is done - but it can happen when
3298 deliver_drop_privilege is set.
3300 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3301 it now includes up to 150 characters of the unexpected data in the log
3304 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3305 and building data strings. The size of both of these buffers was 10 000
3306 bytes - far larger than anybody would *ever* want, thought I. Needless to
3307 say, somebody hit the limit. I have increased the maximum line length to
3308 20 000 and the maximum data length of concatenated lines to 100 000. I have
3309 also fixed two bugs, because there was no checking on these buffers. Tsk,
3310 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3311 buffer is too small.
3313 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3314 lsearch lookups. Now it does.
3316 46. When parsing a route_list item in a manualroute router, a fixed-length
3317 buffer was used for the list of hosts. I made this 1024 bytes long,
3318 thinking that nobody would ever have a list of hosts that long. Wrong.
3319 Somebody had a whole pile of complicated expansion conditions, and the
3320 string was silently truncated, leading to an expansion error. It turns out
3321 that it is easier to change to an unlimited length (owing to other changes
3322 that have happened since this code was originally written) than to build
3323 structure for giving a limitation error. The length of the item that
3324 expands into the list of hosts is now unlimited.
3326 47. The lsearch lookup could not handle data where the length of text line was
3327 more than 4095 characters. Such lines were truncated, leading to shortened
3328 data being returned. It should now handle lines of any length.
3330 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3331 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3334 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3335 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3336 no longer happens in comment lines. A list of replacements is now placed
3337 at the head of all of the source files, except those whose only change is
3338 to replace PERL_COMMAND in the very first #! line.
3340 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3341 messages on the queue, with a bottom-up merge sort, using code contributed
3342 by Michael Haardt. This should make operations like -bp somewhat faster on
3343 large queues. It won't affect queue runners, except when queue_run_in_order
3346 51. Installed eximstats 1.31 in the distribution.
3348 52. Added support for SRV lookups to the dnslookup router.
3350 53. If an ACL referred to $message_body or $message_body_end, the value was not
3351 reset for any messages that followed in the same SMTP session.
3353 54. The store-handling optimization for building very long strings was not
3354 differentiating between the different store pools. I don't think this
3355 actually made any difference in practice, but I've tidied it.
3357 55. While running the routers to verify a sender address, $sender_address
3358 was still set to the sender address. This is wrong, because when routing to
3359 send a bounce to the sender, it would be empty. Therefore, I have changed
3360 it so that, while verifying a sender address, $sender_address is set to <>.
3361 (There is no change to what happens when verifying a recipient address.)
3363 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3364 target A or AAAA records (if not already returned) without resetting the
3365 qualify_single or search_parents options of the DNS resolver. These are
3366 inappropriate in this case because the targets of MX and SRV records must
3367 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3368 target that, when qualified, matched something in the local domain. These
3369 two options are now turned off when doing these lookups.
3371 57. It seems that at least some releases of Reiserfs (which does not have the
3372 concept of a fixed number of inodes) returns zero and not -1 for the
3373 number of available inodes. This interacted badly with check_spool_inodes,
3374 which assumed that -1 was the "no such thing" setting. What I have done is
3375 to check that the total number of inodes is greater than zero before doing
3376 the test of how many are available.
3378 58. When a "warn" ACL statement has a log_message modifier, the message is
3379 remembered, and not repeated. This is to avoid a lot of repetition when a
3380 message has many recipients that cause the same warning to be written.
3381 Howewer, Exim was preserving the list of already written lines for an
3382 entire SMTP session, which doesn't seem right. The memory is now reset if a
3383 new message is started.
3385 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3386 debugging output unless log_rewrite was also set.
3388 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3389 of (int)(handle) when we know that handle contains (void *)(-1).
3391 61. The Exim daemon panic-logs an error return when it closes the incoming
3392 connection. However "connection reset by peer" seems to be common, and
3393 isn't really an error worthy of noting specially, so that particular error
3396 62. When Exim is trying to find all the local interfaces, it used to panic and
3397 die if the ioctl to get the interface flags failed. However, it seems that
3398 on at least one OS (Solaris 9) it is possible to have an interface that is
3399 included in the list of interfaces, but for which you get a failure error
3400 for this call. This happens when the interface is not "plumbed" into a
3401 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3402 failure of the "get flags" call assumes that the interface is down.
3404 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3405 makes life easier for people who are doing arithmetic on fields extracted
3406 from dates, where you often get leading zeros that should not be
3407 interpreted as octal.
3409 64. Added qualify_domain to the redirect router, to override the global
3412 65. If a pathologically long header line contained very many addresses (the
3413 report of this problem mentioned 10 000) and each of them was rewritten,
3414 Exim could use up a very large amount of memory. (It kept on making new
3415 copies of the header line as it rewrote, and never released the old ones.)
3416 At the expense of a bit more processing, the header rewriting function has
3417 been changed so that it no longer eats memory in this way.
3419 66. The generation of the Received: header has been moved from the time that a
3420 message starts to be received, to the time that it finishes. The timestamp
3421 in the Received: header should now be very close to that of the <= log
3422 line. There are two side-effects of this change:
3424 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3425 logged header lines no longer include the local Received: line, because
3426 it has not yet been created. The same applies to a copy of the message
3427 that is returned to a non-SMTP sender when a message is rejected.
3429 (b) When a filter file is tested using -bf, no additional Received: header
3430 is added to the test message. After some thought, I decided that this
3433 This change does not affect the value of $received_for. It is still set
3434 after address rewriting, but before local_scan() is called.
3436 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3438 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3439 gave an unhelpful panic error message, and a defer error. I have managed to
3440 change this behaviour so that it now rejects any supplied certificate,
3441 which seems right, as the list of acceptable certificates is empty.
3443 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3444 gave an unhelpful defer error. I have not managed to make this reject any
3445 supplied certificates, but the error message it gives is "no certificate
3446 supplied", which is not helpful.
3448 70. exigrep's output now also includes lines that are not associated with any
3449 message, but which match the given pattern. Implemented by a patch from
3450 Martin Sluka, which also tidied up the Perl a bit.
3452 71. Recipient callout verification, like sender verification, was using <> in
3453 the MAIL FROM command. This isn't really the right thing, since the actual
3454 sender may affect whether the remote host accepts the recipient or not. I
3455 have changed it to use the actual sender in the callout; this means that
3456 the cache record is now keyed on a recipient/sender pair, not just the
3457 recipient address. There doesn't seem to be a real danger of callout loops,
3458 since a callout by the remote host to check the sender would use <>.
3459 [SEE ABOVE: changed after hitting problems.]
3461 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3462 temporary errors. However, in the case of such a code being given after
3463 the end of a data transmission (i.e. after ".") Exim was failing to write
3464 a retry record for the message. (Yes, there was some broken host that was
3465 actually sending 8xx at this point.)
3467 73. An unknown lookup type in a host list could cause Exim to panic-die when
3468 the list was checked. (An example that provoked this was putting <; in the
3469 middle of a list instead of at the start.) If this happened during a DATA
3470 ACL check, a -D file could be left lying around. This kind of configuration
3471 error no longer causes Exim to die; instead it causes a defer errror. The
3472 incident is still logged to the main and panic logs.
3474 74. Buglet left over from Exim 3 conversion. The message "too many messages
3475 in one connection" was written to the rejectlog but not the mainlog, except
3476 when address rewriting (yes!) was being logged.
3478 75. Added write_rejectlog option.
3480 76. When a system filter was run not as root (that is, when system_filter_user
3481 was set), the values of the $n variables were not being returned to the
3482 main process; thus, they were not subsequently available in the $sn
3485 77. Added +return_path_on_delivery log selector.
3487 78. A connection timeout was being treated differently from recipients deferred
3488 when testing hosts_max_try with a message that was older than the host's
3489 retry timeout. (The host should not be counted, thus allowing all hosts to
3490 be tried at least once before bouncing.) This may have been the cause of an
3491 occasionally reported bug whereby a message would remain on the queue
3492 longer than the retry timeout, but would be bounced if a delivery was
3493 forced. I say "may" because I never totally pinned down the problem;
3494 setting up timeout/retry tests is difficult. See also the next item.
3496 79. The ultimate address timeout was not being applied to errors that involved
3497 a combination of host plus message (for example, a timeout on a MAIL
3498 command). When an address resolved to a number of possible hosts, and they
3499 were not all tried for each delivery (e.g. because of hosts_max_try), a
3500 message could remain on the queue longer than the retry timeout.
3502 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3505 81. Fixed an obscure SMTP outgoing bug which required at least the following
3506 conditions: (a) there was another message waiting for the same server;
3507 (b) the server returned 5xx to all RCPT commands in the first message so
3508 that the message was not completed; (c) the server dropped the connection
3509 or gave a negative response to the RSET that Exim sends to abort the
3510 transaction. The observed case was a dropped connection after DATA that had
3511 been sent in pipelining mode. That is, the server had advertised PIPELINING
3512 but was not implementing it correctly. The effect of the bug was incorrect
3513 behaviour, such as trying another host, and this could lead to a crash.
3519 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3520 and daemon.c were passed as pointers to ints; they should have been
3521 pointers to socklen_t variables (which are typically unsigned ints).
3523 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3526 3. Fixed a really odd bug that affected only the testing scheme; patching a
3527 certain fixed string in the binary changed the value of another string that
3528 happened to be identical to the end of the original first string.
3530 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3531 name", it returns that address as the IP address. On some operating
3532 systems (e.g. Solaris), it also passes back the IP address string as the
3533 "host name". However, on others (e.g. Linux), it passes back an empty
3534 string. Exim wasn't checking for this, and was changing the host name to an
3535 empty string, assuming it had been canonicized.
3537 5. Although rare, it is permitted to have more than one PTR record for a given
3538 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3539 all the names associated with an address, because they do in Solaris.
3540 However, it seems that they do not in Linux for data that comes from the
3541 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3542 I found this out when I moved to a new Linux workstation and tried to run
3543 the Exim test suite.
3545 To get round this problem I have changed the code so that it now does its
3546 own call to the DNS to look up PTR records when searching for a host name.
3547 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3548 addresses that are only in /etc/hosts are still found.
3550 This behaviour is, however, controlled by an option called host_lookup_
3551 order, which defaults to "bydns:byaddr". If people want to use the other
3552 order, or indeed, just use one or the other means of lookup, they can
3553 specify it in this variable.
3555 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3556 some operating systems, this comes back from gethostbyaddr() as an empty
3557 string, and this is what Exim used to test for. However, it seems that in
3558 other systems, "." is yielded. Exim now tests for this case too.
3560 7. The values of check_spool_space and check_log_space are now held internally
3561 as a number of kilobytes instead of an absolute number of bytes. If a
3562 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3563 kilobyte. This means that much larger values can be stored.
3565 8. Exim monitor: an attempt to get the action menu when not actually pointing
3566 at a message produces an empty menu entitled "No message selected". This
3567 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3568 no entries in it ("Shell widget menu has zero width and/or height"). So I
3569 have added a single, blank menu entry in this case.
3571 9. Added ${quote_local_part.
3573 10. MIME decoding is now applied to the contents of Subject: header lines when
3576 11. Now that a reference to $sender_host_address automatically causes a reverse
3577 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3578 host lookup before query-style lookups in lists that might use this
3579 variable. This has therefore been abolished, and the "net-" prefix is no
3580 longer necessary for query-style lookups.
3582 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3583 have been a typo for LFLAGS, so it has been changed.
3585 13. The install script calls Exim with "-C /dev/null" in order to find the
3586 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3587 to be output. Howeve, since Exim outputs its version number before the
3588 error, it didn't break the script. It just looked ugly. I fixed this by
3589 always allowing "-C /dev/null" if the caller is root.
3591 14. Ignore overlarge ACL variable number when reading spool file - insurance
3592 against a later release with more variables having written the file.
3594 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3595 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3596 this, as well as the form without the "IPv6" on the front.
3598 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3599 OS/Makefile-Darwin file.
3601 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3602 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3604 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3605 variable. However, some OS use ints for inodes. I've added cast to long int
3606 to get rid of the compiler warning.
3608 19. I had forgotten to lock out "/../" in configuration file names when
3609 ALT_CONFIG_PREFIX was set.
3611 20. Routers used for verification do not need to specify transports. However,
3612 if such a router generated a host list, and callout was configured, Exim
3613 crashed, because it could not find a port number from the (non-existent)
3614 transport. It now assumes port 25 in this circumstance.
3616 21. Added the -t option to exigrep.
3618 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3619 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3620 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3621 them is set, LOOKUP_LSEARCH is forced.
3623 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3625 24. Added sender and host information to the "rejected by local_scan()" log
3626 line; previously there was no indication of these.
3628 25. Added .include_if_exists.
3630 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3631 Linux. It turns out that not all file systems support this. Apparently some
3632 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3633 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3634 not supported on the file descriptor, is now ignored when Exim is trying to
3635 sync a directory. This applies only to Linux.
3637 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3639 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3640 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3643 29. Added support for maildirsize files from supplied patch (modified a bit).
3645 30. The use of :fail: followed by an empty string could lead Exim to respond to
3646 sender verification failures with (e.g.):
3648 550 Verification failed for <xxx>
3649 550 Sender verify failed
3651 where the first response line was missing the '-' that indicates it is not
3652 the final line of the response.
3654 31. The loop for finding the name of the user that called Exim had a hardwired
3655 limit of 10; it now uses the value of finduser_retries, which is used for
3656 all other user lookups.
3658 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3661 33. Exim was neglecting to zero errno before one call of strtol() when
3662 expanding a string and expecting an integer value. On some systems this
3663 resulted in spurious "integer overflow" errors. Also, it was casting the
3664 result into an int without checking.
3666 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3667 did not work. The code looks as if it has *never* worked, though it appears
3668 to have been documented since at least releast 1.62. I have made it work.
3670 35. The "timeout_DNS" error in retry rules, also documented since at least
3671 1.62, also never worked. As it isn't clear exactly what this means, and
3672 clearly it isn't a major issue, I have abolished the feature by treating it
3673 as "timeout", and writing a warning to the main and panic logs.
3675 36. The display of retry rules for -brt wasn't always showing the error code
3678 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3679 timeout_connect_A, timeout_connect_MX.
3681 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3682 to the empty sender.
3684 39. The daemon was not analysing the content of -oX till after it had closed
3685 stderr and disconnected from the controlling terminal. This meant that any
3686 syntax errors were only noted on the panic log, and the return code from
3687 the command was 0. By re-arranging the code a little, I've made the
3688 decoding happen first, so such errors now appear on stderr, and the return
3689 code is 1. However, the actual setting up of the sockets still happens in
3690 the disconnected process, so errors there are still only recorded on the
3693 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3694 connections (as happens on some IP stacks) was logged at start up time as
3695 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3696 it from "IPv6 and IPv4", which means that two separate sockets are being
3699 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3700 says whether AF_INET or AF_INET6 was passed as an argument.
3702 42. Exiwhat output was messed up when time zones were included in log
3705 43. Exiwhat now gives more information about the daemon's listening ports,
3706 and whether -tls-on-connect was used.
3708 44. The "port" option of the smtp transport is now expanded.
3710 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3711 silently ignored. Now an error message is written to the main and panic
3714 46. There's a new ACL modifier called "logwrite" which writes to a log file
3715 as soon as it is encountered.
3717 47. Added $local_user_uid and $local_user_gid at routing time.
3719 48. Exim crashed when trying to verify a sender address that was being
3722 49. Exim was recognizing only a space character after ".include". It now also
3723 recognizes a tab character.
3725 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3726 extracting the relevant information from the specification. The man page no
3727 longer contains scrambled data for the -d option, and I've added a section
3728 at the front about calling Exim under different names.
3730 51. Added "extra_headers" argument to the "mail" command in filter files.
3732 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3735 53. Installed eximstats 1.29.
3737 54. Added transport_filter_timeout as a generic transport option.
3739 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3740 Cc: header lines. This was required by RFC 822, but it not required by RFC
3743 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3744 incoming messages that did not have them. Now it does so only if the
3745 message originates locally, that is, if there is no associated remote host
3746 address. When Resent- header lines are present, this applies to the Resent-
3747 lines rather than the non-Resent- lines.
3749 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3750 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3752 58. Messages for configuration errors now include the name of the main
3753 configuration file - useful now that there may be more than one file in a
3754 list (.included file names were always shown).
3756 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3757 for those rare installations that do not start the daemon as root or run it
3758 setuid root. I've cut out the call to initgroups() if the daemon is not
3761 60. The Exim user and group can now be bound into the binary as text strings
3762 that are looked up at the start of Exim's processing.
3764 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3766 62. Added $mailstore_basename variable.
3768 63. Installed patch to sieve.c from Michael Haardt.
3770 64. When Exim failed to open the panic log after failing to open the main log,
3771 the original message it was trying to log was written to stderr and debug
3772 output, but if they were not available (the usual case in production), it
3773 was lost. Now it is written to syslog before the two lines that record the
3774 failures to open the logs.
3776 65. Users' Exim filters run in subprocesses under the user's uid. It is
3777 possible for a "deliver" command or an alias in a "personal" command to
3778 provoke an address rewrite. If logging of address rewriting is configured,
3779 this fails because the process is not running as root or exim. There may be
3780 a better way of dealing with this, but for the moment (because 4.30 needs
3781 to be released), I have disabled address rewrite logging when running a
3782 filter in a non-root, non-exim process.
3788 1. The buildconfig auxiliary program wasn't quoting the value set for
3789 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3790 not defined. This bug was masked in 4.22 by the effect that was fixed in
3793 2. Some messages that were rejected after a message id was allocated were
3794 shown as "incomplete" by exigrep. It no longer does this for messages that
3795 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3797 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3798 have allow_domain_literals set, the ID did not get logged in the <= line.
3799 Domain literals are now always recognized in Message-ID: header lines.
3801 4. The first argument for a ${extract expansion item is the key name or field
3802 number. Leading and trailing spaces in this item were not being ignored,
3803 causing some misleading effects.
3805 5. When deliver_drop_privilege was set, single queue runner processes started
3806 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3807 same command in the process it spins off) were not dropping privilege.
3809 6. When the daemon running as "exim" started a queue runner, it always
3810 re-executed Exim in the spun-off process. This is a waste of effort when
3811 deliver_drop_privilege is set. The new process now just calls the
3812 queue-runner function directly.
3818 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3821 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3822 ignored. Though the use of -oP was forcing the writing of a pid file, it
3823 was always written to the default place.
3825 3. If the message "no IP address found for host xxxx" is generated during
3826 incoming verification, it is now followed by identification of the incoming
3827 connection (so you can more easily find what provoked it).
3829 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3831 5. Added some features to "harden" Exim a bit more against certain attacks:
3833 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3834 be put in Local/Makefile. This is like the never_users runtime option,
3835 but it cannot be overridden. The default setting is "root".
3837 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3838 prefix string with which any file named in a -C command line option
3841 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3842 is retained for -C and -D only if the caller of Exim is root. Without
3843 it, the exim user may also use -C and -D and retain privilege.
3845 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3846 command line option is disabled.
3848 6. Macro names set by the -D option must start with an upper case letter, just
3849 like macro names defined in the configuration file.
3851 7. Added "dereference=" facility to LDAP.
3853 8. Two instances of the typo "uknown" in the source files are fixed.
3855 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3856 the Configure-Makefile script screwed up while processing it.
3858 10. Incorporated PCRE 4.4.
3860 11. The SMTP synchronization check was not operating right at the start of an
3861 SMTP session. For example, it could not catch a HELO sent before the client
3862 waited for the greeting. There is now a check for outstanding input at the
3863 point when the greeting is written. Because of the duplex, asynchronous
3864 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3865 way, but not yet received, when the check is performed.
3867 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3868 on TCP/IP sockets, because this apparently causes some broken clients to
3871 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3872 unchanged) from the Cygwin maintainer.
3874 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3875 was supported instead of testing for mbx. Effectively a typo.
3877 15. The spa authenticator server code was not checking that the input it
3878 received was valid base64.
3880 16. The debug output line for the "set" modifier in ACLs was not showing the
3881 name of the variable that was being set.
3883 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3885 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3886 lookup on its own. Something else was needed to trigger the lookup. For
3887 example, a match in host_lookup or the need for a host name in a host list.
3888 Now, if $sender_host_name is referenced and the host name has not yet been
3889 looked up, a lookup is performed. If the lookup fails, the variable remains
3890 empty, and $host_lookup_failed is set to "1".
3892 19. Added "eqi" as a case-independent comparison operator.
3894 20. The saslauthd authentication condition could segfault if neither service
3895 nor realm was specified.
3897 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3898 error message that was logged was misleading, and incoming SMTP
3899 connections were dropped. The message is now more accurate, and temporary
3900 errors are given to SMTP connections.
3902 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3903 (except RSET) with a 421 error, until QUIT is received. However, it was
3904 failing to send a response to QUIT.
3906 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3907 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3908 ACL is now run after the helo_try_verify_hosts code.
3910 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3911 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3912 case-independent, so other case variants are also recognized). Apparently
3913 some systems use these upper case variants.
3915 25. If more than two messages were waiting for the same host, and a transport
3916 filter was specified for the transport, Exim sent two messages over the
3917 same TCP/IP connection, and then failed with "socket operation on non-
3918 socket" when it tried to send the third.
3920 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3922 27. The extern definition of crypt16() in expand.c was not being excluded when
3923 the OS had its own crypt16() function.
3925 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3926 as a preferred synonym for return_size_limit, both as an option and as an
3929 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3931 30. Changed the default configuration ACL to relax the local part checking rule
3932 for addresses that are not in any local domains. For these addresses,
3933 slashes and pipe symbols are allowed within local parts, but the sequence
3934 /../ is explicitly forbidden.
3936 31. SPA server authentication was not clearing the challenge buffer before
3939 32. log_message in a "warn" ACL statement was writing to the reject log as
3940 well as to the main log, which contradicts the documentation and doesn't
3941 seem right (because no rejection is happening). So I have stopped it.
3943 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3944 However, I am unable to do any testing of this.
3946 34. Fixed an infelicity in the appendfile transport. When checking directories
3947 for a mailbox, to see if any needed to be created, it was accidentally
3948 using path names with one or more superfluous leading slashes; tracing
3949 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3951 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3952 contents are added to the log line that is written for every discarded
3953 recipient. (Previously a log_message setting was ignored.)
3955 36. The ${quote: operator now quotes the string if it is empty.
3957 37. The install script runs exim in order to find its version number. If for
3958 some reason other than non-existence or emptiness, which it checks, it
3959 could not run './exim', it was installing it with an empty version number,
3960 i.e. as "exim-". This error state is now caught, and the installation is
3963 38. An argument was missing from the function that creates an error message
3964 when Exim fails to connect to the socket for saslauthd authentication.
3965 This could cause Exim to crash, or give a corrupted message.
3967 39. Added isip, isip4, and isip6 to ${if conditions.
3969 40. The ACL variables $acl_xx are now saved with the message, and can be
3970 accessed later in routers, transports, and filters.
3972 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3973 strings in the file are not string-expanded.
3975 42. If a MAIL command specified a SIZE value that was too large to fit into an
3976 int variable, the check against message_size_limit failed. Such values are
3977 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3978 day this will have to be increased, but I don't think I want to be around
3979 when emails are that large.
3986 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3987 iconv() is not standard in FreeBSD.
3989 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3990 IPv6 enabled. The observed symptom was a segmentation fault on return from
3991 the function os_common_find_running_interfaces() in src/os.c.
3993 3. In the check_special_case() function in daemon.c I had used "errno" as an
3994 argument name, which causes warnings on some systems. This was basically a
3995 typo, since it was named "eno" in the comments!
3997 4. The code that waits for the clock to tick (at a resolution of some fraction
3998 of a second) so as to ensure message-id uniqueness was always waiting for
3999 at least one whole tick, when it could have waited for less. [This is
4000 almost certainly not relevant at current processor speeds, where it is
4001 unlikely to ever wait at all. But we try to future-proof.]
4003 5. The function that sleeps for a time interval that includes fractions of a
4004 second contained a race. It did not block SIGALRM between setting the
4005 timer, and suspending (a couple of lines later). If the interval was short
4006 and the sigsuspend() was delayed until after it had expired, the suspension
4007 never ended. On busy systems this could lead to processes getting stuck for
4010 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4011 process, before it forks any delivery processes. The open lookup caching
4012 mechanism meant that the open file or database connection was passed into
4013 the delivery process. The problem was that delivery processes always tidy
4014 up cached lookup data. This could cause a problem for the next delivery
4015 process started by the queue runner, because the external queue runner
4016 process does not know about the closure. So the next delivery process
4017 still has data in the lookup cache. In the case of a file lookup, there was
4018 no problem because closing a file descriptor in a subprocess doesn't affect
4019 the parent. However, if the lookup was caching a connection to a database,
4020 the connection was closed, and the second delivery process was likely to
4021 see errors such as "PGSQL: query failed: server closed the connection
4022 unexpectedly". The problem has been fixed by closing all cached lookups
4023 in a queue runner before running a delivery process.
4025 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4026 seem to have the "const" qualifier which it has on other OS. I've
4029 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4030 *of the same type* (client or server) with the same public name that an
4031 error should be diagnosed.
4033 9. When Exim looked up a host name for an IP address, but failed to find the
4034 original IP address when looking up the host name (a safety check), it
4035 output the message "<ip address> does not match any IP for NULL", which was
4036 confusing, to say the least. The bug was that the host name should have
4037 appeared instead of "NULL".
4039 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4040 user that is built into the binary, and the -C or -D options is used, root
4041 privilege is dropped before the configuration file is read. In addition,
4042 logging is switched to stderr instead of the normal log files. If the
4043 configuration then re-defines the Exim user, the unprivileged environment
4044 is probably not what is expected, so Exim logs a panic warning message (but
4047 However, if deliver_drop_privilege is set, the unprivileged state may well
4048 be exactly what is intended, so the warning has been cut out in that case,
4049 and Exim is allowed to try to write to its normal log files.
4055 1. smtp_return_error_details was not giving details for temporary sender
4056 or receiver verification errors.
4058 2. Diagnose a configuration error if two authenticators have the same public
4061 3. Exim used not to create the message log file for a message until the first
4062 delivery attempt. This could be confusing when incoming messages were held
4063 for policy or load reasons. The message log file is now created at the time
4064 the message is received, and an initial "Received" line is written to it.
4066 4. The automatically generated man page for command line options had a minor
4067 bug that caused no ill effects; however, a more serious problem was that
4068 the procedure for building the man page automatically didn't always
4069 operate. Consequently, release 4.20 contains an out-of-date version. This
4070 shouldn't happen again.
4072 5. When building Exim with embedded Perl support, the script that builds the
4073 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4074 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4076 6. The freeze_tell option was not being used for messages that were frozen on
4077 arrival, either by an ACL or by local_scan().
4079 7. Added the smtp_incomplete_transaction log selector.
4081 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4082 was accepting AUTH without a new EHLO.
4084 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4085 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4088 10. Logging of TCP/IP connections (when configured) now happens in the main
4089 daemon process instead of the child process, so that the TCP/IP connection
4090 count is more accurate (but it can never be perfect).
4092 11. The use of "drop" in a nested ACL was not being handled correctly in the
4093 outer ACL. Now, if condition failure induced by the nested "drop" causes
4094 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4095 or "require"), the connection is dropped.
4097 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4098 that yield "discard" can now be used with an "accept" or a "discard" verb,
4099 but an error is generated for any others (because I can't see a useful way
4100 to define what should happen).
4102 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4103 are now processed in the same way as lines in the Exim configuration file.
4104 In particular, continuation lines are supported.
4106 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4108 15. Added -ti meaning -t -i.
4110 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4111 domains, and warn by logging if others are found.
4113 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4114 returned from GIFCONF when Exim is trying to find the list of interfaces on
4115 a host. The code in os.c has been modified to copy each ifreq to an aligned
4116 structure in all cases.
4118 Also, in some cases, the returned ifreq's were being copied to a 'struct
4119 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4120 means the last couple of bytes of an IPv6 address could be chopped if the
4121 ifreq contained only a normal sockaddr (14 bytes storage).
4123 18. Named domain lists were not supported in the hosts_treat_as_local option.
4124 An entry such as +xxxx was not recognized, and was treated as a literal
4127 19. Ensure that header lines added by a DATA ACL are included in the reject log
4128 if the ACL subsequently rejects the message.
4130 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4131 MD5 (which is deprecated).
4133 21. When testing a filter file using -bf, Exim was writing a message when it
4134 took the sender from a "From " line in the message, but it was not doing so
4135 when it took $return_path from a Return-Path: header line. It now does.
4137 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4138 with a valid header line field name (a series of printing characters
4139 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4141 23. Changed "disc" in the source to "disk" to conform to the documentation and
4142 the book and for uniformity.
4144 24. Ignore Sendmail's -Ooption=value command line item.
4146 25. When execve() failed while trying to run a command in a pipe transport,
4147 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4148 could be confused with a return value of 69 from the command itself. This
4149 has been changed to 127, the value the shell returns if it is asked to run
4150 a non-existent command. The wording for the related log line suggests a
4151 non-existent command as the problem.
4153 26. If received_header_text expands to an empty string, do not add a Received:
4154 header line to the message. (Well, it adds a token one on the spool, but
4155 marks it "old" so that it doesn't get used or transmitted.)
4157 27. Installed eximstats 1.28 (addition of -nt option).
4159 28. There was no check for failure on the call to getsockname() in the daemon
4160 code. This can fail if there is a shortage of resources on the system, with
4161 ENOMEM, for example. A temporary error is now given on failure.
4163 29. Contrary to the C standard, it seems that in some environments, the
4164 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4165 program. Exim now does this explicitly; it affects the formatting of
4166 timestamps using strftime().
4168 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4169 complaints. I've now initialized all the variables, to avoid this.
4171 32. Header lines added by a system filter were not being "seen" during
4172 transport-time rewrites.
4174 33. The info_callback() function passed to OpenSSL is set up with type void
4175 (*)(SSL *, int, int), as described somewhere. However, when calling the
4176 function (actually a macro) that sets it up, the type void(*)() is
4177 expected. I've put in a cast to prevent warnings from picky compilers.
4179 34. If a DNS black list lookup found a CNAME record, but there were no A
4180 records associated with the domain it pointed at, Exim crashed.
4182 35. If a DNS black list lookup returned more than one A record, Exim ignored
4183 all but the first. It now scans all returned addresses if a particular IP
4184 value is being sought. In this situation, the contents of the
4185 $dnslist_value variable are a list of all the addresses, separated by a
4188 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4189 to accept a host name and all its aliases if the forward lookup for any of
4190 them yielded the IP address of the incoming connection. Now it accepts only
4191 those names whose forward lookup yields the correct IP address. Any other
4192 names are discarded. This closes a loophole whereby a rogue DNS
4193 administrator could create reverse DNS records to break through a
4194 wildcarded host restriction in an ACL.
4196 37. If a user filter or a system filter that ran in a subprocess used any of
4197 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4198 the wrong values were passed to the pipe command ($thisaddress had the
4199 value of $0, $0 had the value of $1, etc). This bug was introduced by
4200 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4202 38. Improved the line breaking for long SMTP error messages from ACLs.
4203 Previously, if there was no break point between 40 and 75 characters, Exim
4204 left the rest of the message alone. Two changes have been made: (a) I've
4205 reduced the minimum length to 35 characters; (b) if it can't find a break
4206 point between 35 and 75 characters, it looks ahead and uses the first one
4207 that it finds. This may give the occasional overlong line, but at least the
4208 remaining text gets split now.
4210 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4211 file descriptors might be low, and that setting 1000 would always raise it.
4212 It turns out that in some environments, the limit is already over 1000 and
4213 that lowering it causes trouble. So now Exim takes care not to decrease it.
4215 40. When delivering a message, the value of $return_path is set to $sender_
4216 address at the start of routing (routers may change the value). By an
4217 oversight, this default was not being set up when an address was tested by
4218 -bt or -bv, which affected the outcome if any router or filter referred to
4221 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4222 log only when "message" or "log_message" are set. However, if one of the
4223 conditions was an address verification, or a call to a nested ACL, the
4224 messages generated by the underlying test were being passed through. This
4225 no longer happens. The underlying message is available in $acl_verify_
4226 message for both "message" and "log_message" expansions, so it can be
4227 passed through if needed.
4229 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4230 new expansion $bh_ to give the encoded byte string without charset
4231 translation. Translation happens only if iconv() is available; HAVE_ICONV
4232 indicates this at build time. HEADERS_CHARSET gives the charset to
4233 translate to; headers_charset can change it in the configuration, and
4234 "headers charset" can change it in an individual filter file.
4236 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4237 that creates RFC 2047 encoded "words" labels them as that charset instead
4238 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4239 expansion operator; (ii) when Exim creates a From: line for a local
4240 message; (iii) when a header line is rewritten to include a "phrase" part.
4242 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4243 buggy, causing it to skip the first lines of messages whose message ID
4244 ended in 'D'. This would not have bitten before Exim release 4.14, because
4245 message IDs were unlikely to end in 'D' before then. The effect was to have
4246 incorrect size information for certain domains.
4248 45. #include "config.h" was missing at the start of the crypt16.c module. This
4249 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4252 46. If there was a timeout during a "random" callout check, Exim treated it as
4253 a failure of the random address, and carried on sending RSET and the real
4254 address. If the delay was just some slowness somewhere, the response to the
4255 original RCPT would be taken as a response to RSET and so on, causing
4256 mayhem of various kinds.
4258 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4259 when I implemented it. It didn't allow for the fact that some option values
4260 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4261 the right test for positive values.
4263 48. Domain names in DNS records are case-independent. Exim always looks them up
4264 in lower case. Some resolvers return domain names in exactly the case they
4265 appear in the zone file, that is, they may contain uppercase letters. Not
4266 all resolvers do this - some return always lower case. Exim was treating a
4267 change of case by a resolver as a change of domain, similar to a widening
4268 of a domain abbreviation. This triggered its re-routing code and so it was
4269 trying to route what was effectively the same domain again. This normally
4270 caused routing to fail (because the router wouldn't handle the domain
4271 twice). Now Exim checks for this case specially, and just changes the
4272 casing of the domain that it ultimately uses when it transmits the message
4275 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4278 50. If a filter generated a file delivery with a non-absolute name (possible if
4279 no home directory exists for the router), the forbid_file option was not
4282 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4283 the existing equality matching.
4285 52. Exim was using ints instead of ino_t variables in some places where it was
4286 dealing with inode numbers.
4288 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4289 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4290 called TMPDIR, and if it finds it is different, it changes its value.
4292 54. The smtp_printf() function is now made available to local_scan() so
4293 additional output lines can be written before returning. There is also an
4294 smtp_fflush() function to enable the detection of a dropped connection.
4295 The variables smtp_input and smtp_batched_input are exported to
4298 55. Changed the default runtime configuration: the message "Unknown user"
4299 has been removed from the ACL, and instead placed on the localuser router,
4300 using the cannot_route_message feature. This means that any verification
4301 failures that generate their own messages won't get overridden. Similarly,
4302 the "Unrouteable address" message that was in the ACL for unverifiable
4303 relay addresses has also been removed.
4305 56. Added hosts_avoid_esmtp to the smtp transport.
4307 57. The exicyclog script was not checking for the esoteric option
4308 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4309 will work only if exicyclog is run under the appropriate euid.
4311 58. Following a discussion on the list, the rules by which Exim recognises line
4312 endings on incoming messages have been changed. The -dropcr and drop_cr
4313 options are now no-ops, retained only for backwards compatibility. The
4314 following line terminators are recognized: LF CRLF CR. However, special
4315 processing applies to CR:
4317 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4318 nor a local message in the state where . is a terminator.
4320 (ii) If a bare CR is encountered in a header line, an extra space is added
4321 after the line terminator so as not to end the header. The reasoning
4322 behind this is that bare CRs in header lines are most likely either
4323 to be mistakes, or people trying to play silly games.
4325 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4326 was being incorrectly given as 18 bytes larger than it should have been.
4327 This is a VOB (very old bug).
4329 60. This may never have affected anything current, but just in case it has:
4330 When the local host is found other than at the start of a list of hosts,
4331 the local host, those with the same MX, and any that follow, are discarded.
4332 When the list in question was part of a longer list of hosts, the following
4333 hosts (not currently being processed) were also being discarded. This no
4334 longer happens. I'm not sure if this situation could ever has previously
4337 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4340 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4341 header. This is something that is recommended in a new Internet Draft, and
4342 is something that is documented as being done by Sendmail. There are two
4343 possible values. For messages generated by the autoreply transport, Exim
4346 Auto-Submitted: auto-replied
4348 whereas for all other generated messages (e.g. bounces) it adds
4350 Auto-Submitted: auto-generated
4352 63. The "personal" condition in filters now includes a test for the
4353 Auto-Submitted: header. If it contains the string "auto-" the message it
4354 not considered personal.
4356 64. Added rcpt_include_affixes as a generic transport option.
4358 65. Added queue_only_override (default true).
4360 66. Added the syslog_duplication option.
4362 67. If what should have been the first header line of a message consisted of
4363 a space followed by a colon, Exim was mis-interpreting it as a header line.
4364 It isn't of course - it is syntactically invalid and should therefore be
4365 treated as the start of the message body. The misbehaviour could have
4366 caused a number of strange effects, including loss of data in subsequent
4367 header lines, and spool format errors.
4369 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4370 client host had authenticated. This control can now be exercised by an ACL
4371 for more flexibility.
4373 69. By default, callouts do not happen when testing with -bh. There is now a
4374 variant, -bhc, which does actually run the callout code, including
4375 consulting and updating the callout cache.
4377 70. Added support for saslauthd authentication, courtesy of Alexander
4380 71. If statvfs() failed on the spool or log directories while checking their
4381 size for availability, Exim confusingly gave the error "space shortage".
4382 Furthermore, in debugging mode it crashed with a floating point exception.
4383 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4384 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4385 serious problem, Exim now writes to the main and panic logs when this
4386 happens, with details of the failure. It then refuses to accept the
4387 incoming message, giving the message "spool directory problem" or "log
4388 directory problem" with a 421 code for SMTP messages.
4390 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4391 0, 1, and 2 exist, because some OS complain for execs without them (see
4392 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4393 descriptors. However, the code omitted to check that the open succeeded,
4394 causing mysterious errors if for some reason the permissions on /dev/null
4395 got screwed. Now Exim writes a message to the main and panic logs, and
4396 bombs out if it can't open /dev/null.
4398 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4399 interact so that it is all more flexible. It is supposed to remain
4400 backwards compatible. Also added extra_local_interfaces.
4402 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4403 to bomb out with an assertion failure - to the client this appears as a
4404 connection drop. This problem occurs in the part of the code that was taken
4405 from the Samba project. Fortunately, the assertion is in a very simple
4406 function, so I have fixed this by reproducing the function inline in the
4407 one place where it is called, and arranging for authentication to fail
4408 instead of killing the process with assert().
4410 75. The SPA client code was not working when the server requested OEM rather
4411 than Unicode encoding.
4413 76. Added code to make require_files with a specific uid setting more usable in
4414 the case where statting the file as root fails - usually a non-root-mounted
4415 NFS file system. When this happens and the failure is EACCES, Exim now
4416 forks a subprocess and does the per-uid checking as the relevant uid.
4418 77. Added process_log_path.
4420 78. If log_file_path was not explicitly set, a setting of check_log_space or
4421 check_log_inodes was ignored.
4423 79. If a space check for the spool or log partitions fails, the incident is now
4424 logged. Of course, in the latter case the data may get lost...
4426 80. Added the %p formatting code to string_format() so that it can be used to
4427 print addresses in debug_print(). Adjusted all the address printing in the
4428 debugging in store.c to use %p rather than %d.
4430 81. There was a concern that a line of code in smtp_in.c could overflow a
4431 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4432 initially expressed, the concern was not well-founded, because trailing
4433 spaces are removed early. However, if the trailing spaces were followed by
4434 a NULL, they did not get removed, so the overflow was possible. Two fixes
4437 (a) I re-wrote the offending code in a cleaner fashion.
4438 (b) If an incoming SMTP command contains a NULL character, it is rejected
4441 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4442 runs initgroups(), so that if the Exim user is in any additional groups,
4443 they will be used during message reception.
4449 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob