1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.438 2006/11/20 13:53:44 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.
328 PH/47 Put in an explicit test for a DNS lookup of an address record where the
329 "domain" is actually an IP address, and force a failure. This locks out
330 those revolvers/nameservers that support "A-for-A" lookups, in
331 contravention of the specifications.
339 SC/01 Use a glob alias rather than an array ref in eximstats generated
340 parser. This improves both readability and performance.
342 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
343 Don't display local sender or destination tables in eximstats unless
344 there is data to show.
345 Added average volumes into the eximstats top table text output.
347 SC/03 Collect data on the number of addresses (recipients) as well
348 as the number of messages in eximstats.
350 TF/01 Correct an error in the documentation for the redirect router. Exim
351 does (usually) call initgroups() when daemonizing.
353 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
354 with consistent privilege compared to when running as a daemon.
356 TF/03 Note in the spec that $authenticated_id is not set for local
357 submissions from trusted users.
359 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
360 Thanks to Dean Brooks <dean@iglou.com> for the patch.
362 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
363 by adding some example configuration directives to the default
364 configuration file. A little bit of work is required to uncomment the
365 directives and define how usernames and passwords are checked, but
366 there is now a framework to start from.
368 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
369 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
370 without this. I don't know how relevant this is to other LDAP libraries.
372 PH/02 Add the verb name to the "unknown ACL verb" error.
374 PH/03 Magnus Holmgren's patch for filter_prepend_home.
376 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
378 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
379 directory not expanded when it should be if an expanded home directory
380 was set for the address (which is overridden by the transport).
382 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
385 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
386 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
387 because it is too late at that time, and has no effect.
389 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
390 security issue with \' (bugzilla #107). I could not use the
391 PQescapeStringConn() function, because it needs a PGconn value as one of
394 PH/08 When testing addresses using -bt, indicate those final addresses that
395 are duplicates that would not cause an additional delivery. At least one
396 person was confused, thinking that -bt output corresponded to deliveries.
397 (Suppressing duplicates isn't a good idea as you lose the information
398 about possibly different redirections that led to the duplicates.)
400 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
401 systems where poll() doesn't work, in particular OS X.
403 PH/10 Added more information to debugging output for retry time not reached.
405 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
406 operations in malware.c.
408 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
411 PH/13 If write_rejectlog was set false when logging was sent to syslog with
412 syslog_duplication set false, log lines that would normally be written
413 both the the main log and to the reject log were not written to syslog at
416 PH/14 In the default configuration, change the use of "message" in ACL warn
417 statements to "add_header".
419 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
420 not followed by a command (e.g. "seen endif").
422 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
423 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
426 PH/17 Added extra conditions to the default value of delay_warning_condition
430 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
431 { match{$h_precedence:}{(?i)bulk|list|junk} } \
432 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
435 The Auto-Submitted: and various List- headers are standardised, whereas I
436 don't think Precedence: ever was.
438 PH/18 Refactored debugging code in route_finduser() to show more information,
439 in particular, the error code if getpwnam() issues one.
441 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
442 This is apparently needed in addition to the PH/07 change above to avoid
443 any possible encoding problems.
445 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
446 but not after initializing Perl.
448 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
449 output them only if debugging. By default they are written stderr,
450 apparently, which is not desirable.
452 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
455 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
458 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
460 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
461 authenticated or an ident call has been made. Suppress the default
462 values for $authenticated_id and $authenticated_sender (but permit -oMai
463 and -oMas) when testing with -bh.
465 PH/24 Re-jigged the order of the tests in the default configuration so that the
466 tests for valid domains and recipients precede the DNS black list and CSA
467 tests, on the grounds that those ones are more expensive.
469 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
470 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
471 This bug exists in every version of Exim that I still have, right back to
474 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
475 However, an attempt to turn on case-sensitivity in a regex key by
476 including (?-i) didn't work because the subject string was already
477 lowercased, and the effects were non-intuitive. It turns out that a
478 one-line patch can be used to allow (?-i) to work as expected.
484 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
485 other effects) broke the use of negated acl sub-conditions.
487 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
490 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
491 "Deny" causes Exim to reject the incoming connection with a 554 error.
492 Unfortunately, if there is a major crisis, such as a disk failure,
493 tcp-wrappers gives "deny", whereas what one would like would be some
494 kind of temporary error. A kludge has been added to help with this.
495 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
496 554 error is used if errno is still zero or contains ENOENT (which occurs
497 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
500 PH/03 Add -lutil to the default FreeBSD LIBS setting.
502 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
503 errors. Otherwise a message that provokes a temporary error (when other
504 messages do not) can cause a whole host to time out.
506 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
507 addresses were routed directly to files or pipes from a redirect router.
508 File deliveries just didn't batch; pipe deliveries might have suffered
511 PH/06 A failure to get a lock for a hints database would erroneously always say
512 "Failed to get write lock", even when it was really a read lock.
514 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
515 of 0600. This has been changed to use the value of the lockfile_mode
516 option (which defaults to 0600).
518 PH/08 Applied small patch from the Sieve maintainer.
520 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
521 folder from quota calculations, a direct delivery into this folder messed
522 up the contents of the maildirsize file. This was because the regex was
523 used only to exclude .Trash (or whatever) when the size of the mailbox
524 was calculated. There was no check that a delivery was happening into an
525 excluded directory. This bug has been fixed by ignoring all quota
526 processing for deliveries into excluded directories.
528 PH/10 Added the maildirfolder_create_regex option to appendfile.
534 PH/01 The code for finding all the local interface addresses on a FreeBSD
535 system running IPv6 was broken. This may well have applied to all BSD
536 systems, as well as to others that have similar system calls. The broken
537 code found IPv4 interfaces correctly, but gave incorrect values for the
538 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
539 that it would not match correctly against @[] and not recognize the IPv6
542 PH/02 The ipliteral router was not recognizing addresses of the form user@
543 [ipv6:....] because it didn't know about the "ipv6:" prefix.
545 PH/03 Added disable_ipv6.
547 PH/04 Changed $reply_address to use the raw form of the headers instead of the
548 decoded form, because it is most often used to construct To: headers
549 lines in autoreplies, and the decoded form may well be syntactically
550 invalid. However, $reply_address has leading white space removed, and all
551 newlines turned into spaces so that the autoreply transport does not
554 PH/05 If group was specified without a user on a router, and no group or user
555 was specified on a transport, the group from the router was ignored.
557 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
558 for visible compile-time settings that can be used to change these
559 numbers, for those that want even more. Backwards compatibility with old
560 spool files has been maintained. However, going back to a previous Exim
561 release will lost any variables that are in spool files.
563 PH/07 Two small changes when running in the test harness: increase delay when
564 passing a TCP/IP connection to a new process, in case the original
565 process has to generate a bounce, and remove special handling of
566 127.0.0.2 (sic), which is no longer necessary.
568 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
569 be the same on different OS.
571 PH/09 Moved a debug statement in filter processing to avoid a race problem when
574 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
575 whether --show-vars was specified or not
577 JJ/02 exipick: Added support for new ACL variable spool format introduced
580 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
581 syntactically invalid From: or Reply-to: line, and a filter used this to
582 generate an autoreply, and therefore failed to obtain an address for the
583 autoreply, Exim could try to deliver to a non-existent relative file
584 name, causing unrelated and misleading errors. What now happens is that
585 it logs this as a hard delivery error, but does not attempt to create a
588 PH/11 The exinext utility has a -C option for testing purposes, but although
589 the given file was scanned by exinext itself; it wasn't being passed on
590 when Exim was called.
592 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
593 an end-of-file indication when reading a command response.
595 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
596 compiled. In many other places in Exim, IPv6 addresses are always
597 recognized, so I have changed this. It also means that IPv4 domain
598 literals of the form [IPV4:n.n.n.n] are now always recognized.
600 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
601 used if the router is not running as root, for example, when verifying at
602 ACL time, or when using -bh. The debugging output from this situation was
603 non-existent - all you got was a failure to exec. I have made two
606 (a) Failures to set uid/gid, the current directory, or a process leader
607 in a subprocess such as that created by queryprogram now generate
608 suitable debugging ouput when -d is set.
610 (b) The queryprogram router detects when it is not running as root,
611 outputs suitable debugging information if -d is set, and then runs
612 the subprocess without attempting to change uid/gid.
614 PH/15 Minor change to Makefile for building test_host (undocumented testing
617 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
618 additional section of a DNS packet that returns MX or SRV records.
619 Instead, it always explicitly searches for A/AAAA records. This avoids
620 major problems that occur when a DNS server includes only records of one
621 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
622 fixed another bug: if SRV records were looked up and the corresponding
623 address records were *not* found in the additional section, the port
624 values from the SRV records were lost.
626 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
627 using the correct key (the original address) when searching the retry
628 rules in order to find which one to use for generating the retry hint.
630 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
631 adding the default one. Similarly, if it contains a Reply-To: header, the
632 errors_reply_to option, if set, is not used.
634 PH/19 When calculating a retry time, Exim used to measure the "time since
635 failure" by looking at the "first failed" field in the retry record. Now
636 it does not use this if it is later than than the arrival time of the
637 message. Instead it uses the arrival time. This makes for better
638 behaviour in cases where some deliveries succeed, thus re-setting the
639 "first failed" field. An example is a quota failure for a huge message
640 when small messages continue to be delivered. Without this change, the
641 "time since failure" will always be short, possible causing more frequent
642 delivery attempts for the huge message than are intended.
643 [Note: This change was subsequently modified - see PH/04 for 4.62.]
645 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
646 $1, $2, $3) because the numerical variables can be reset during some
647 expansion items (e.g. "match"), thereby losing the authentication data.
649 PH/21 Make -bV show the size of off_t variables so that the test suite can
650 decide whether to run tests for quotas > 2G.
652 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
653 mailbox_size, and mailbox_filecount in the appendfile transport. If a
654 filecount value is greater than 2G or if a quota value is greater than 2G
655 on a system where the size of off_t is not greater than 4, a panic error
658 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
659 never match. The debug and -bh output now contains an explicit error
660 message indicating a malformed IPv4 address or mask.
662 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
663 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
666 PH/25 Do not write to syslog when running in the test harness. The only
667 occasion when this arises is a failure to open the main or panic logs
668 (for which there is an explicit test).
670 PH/26 Added the /no_tell option to "control=freeze".
672 PH/27 If a host name lookup failed very early in a connection, for example, if
673 the IP address matched host_lookup and the reverse lookup yielded a name
674 that did not have a forward lookup, an error message of the form "no IP
675 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
676 could be logged. Now it outputs the IP address instead of "NULL".
678 PH/28 An enabling patch from MH: add new function child_open_exim2() which
679 allows the sender and the authenticated sender to be set when
680 submitting a message from within Exim. Since child_open_exim() is
681 documented for local_scan(), the new function should be too.
683 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
684 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
685 results in an empty string is now treated as unset.
687 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
689 PH/31 Added sender_verify_fail logging option.
691 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
692 needed by RFC 822 but not by RFC 2822 was commented out. I have now
693 tidied the source and removed it altogether.
695 PH/33 When a queue run was abandoned because the load average was too high, a
696 log line was always written; now it is written only if the queue_run log
697 selector is set. In addition, the log line for abandonment now contains
698 information about the queue run such as the pid. This is always present
699 in "start" and "stop" lines but was omitted from the "abandon" line.
701 PH/34 Omit spaces between a header name and the colon in the error message that
702 is given when verify = headers_syntax fails (if there are lots of them,
703 the message gets confusing).
705 PH/35 Change the default for dns_check_names_pattern to allow slashes within
706 names, as there are now some PTR records that contain slashes. This check
707 is only to protect against broken name servers that fall over on strange
708 characters, so the fact that it applies to all lookups doesn't matter.
710 PH/36 Now that the new test suite is complete, we can remove some of the
711 special code in Exim that was needed for the old test suite. For example,
712 sorting DNS records because real resolvers return them in an arbitrary
713 order. The new test suite's fake resolver always returns records in the
716 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
717 bounces) except when queue_only is set, to avoid logging races between
718 the different processes.
720 PH/38 Panic-die if .include specifies a non-absolute path.
722 PH/39 A tweak to the "H" retry rule from its user.
724 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
725 a label. They prevented compilation on older perls.
727 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
728 a warning to be raised on newish perls.
730 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
731 on queue. Changes to match documented behaviour of showing count of
732 messages matching specified criteria.
734 PH/40 Changed the default ident timeout from 30s to 5s.
736 PH/41 Added support for the use of login_cap features, on those BSD systems
737 that have them, for controlling the resources used by pipe deliveries.
739 PH/42 The content-scanning code uses fopen() to create files in which to put
740 message data. Previously it was not paying any attention to the mode of
741 the files. Exim runs with umask(0) because the rest of the code creates
742 files with open(), and sets the required mode explicitly. Thus, these
743 files were ending up world-writeable. This was not a big issue, because,
744 being within the spool directory, they were not world-accessible. I have
745 created a function called modefopen, which takes an additional mode
746 argument. It sets umask(777), creates the file, chmods it to the required
747 mode, then resets the umask. All the relevant calls to fopen() in the
748 content scanning code have been changed to use this function.
750 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
751 to 24 hours. This avoids potential overflow problems when processing G
752 and H retry rules. I suspect nobody ever tinkers with this value.
754 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
756 PH/45 When the plaintext authenticator is running as a client, the server's
757 challenges are checked to ensure they are valid base64 strings. By
758 default, the authentication attempt is cancelled if an invalid string is
759 received. Setting client_ignore_invalid_base64 true ignores these errors.
760 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
761 they are received. Thus, the responses can be made to depend on the
762 challenges. If an invalid string is ignored, an empty string is placed in
765 PH/46 Messages that are created by the autoreply transport now contains a
766 References: header, in accordance with RFCs 2822 and 3834.
768 PH/47 Added authenticated_sender_force to the smtp transport.
770 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
772 PH/49 Installed latest patch from the Sieve maintainer.
774 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
775 was also set, the appendfile transport was unnecessarily scanning a
776 directory of message files (e.g. for maildir delivery) to find the count
777 of files (along with the size), even though it did not need this
778 information. It now does the scan only if it needs to find either the
779 size of the count of files.
781 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
783 PH/52 Two bugs concerned with error handling when the smtp transport is
786 (i) Exim was not creating retry information for temporary errors given
787 for individual recipients after the DATA command when the smtp transport
788 was used in LMTP mode. This meant that they could be retried too
789 frequently, and not timed out correctly.
791 (ii) Exim was setting the flag that allows error details to be returned
792 for LMTP errors on RCPT commands, but not for LMTP errors for individual
793 recipients that were returned after the DATA command.
795 PH/53 This is related to PH/52, but is more general: for any failing address,
796 when detailed error information was permitted to be returned to the
797 sender, but the error was temporary, then after the final timeout, only
798 "retry timeout exceeded" was returned. Now it returns the full error as
799 well as "retry timeout exceeded".
801 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
802 do this, and (what is worse) MTAs that accept it.
804 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
805 will now be deprecated.
807 PH/56 New os.c-cygwin from the Cygwin maintainer.
809 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
810 formats (previously only available in exim formats via -bpr, -bpru,
811 and -bpra. Now also available in native and exiqgrep formats)
813 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
814 with very large, slow to parse queues
816 JJ/08 exipick: added ! as generic prefix to negate any criteria format
818 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
820 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
821 responses to authentication challenges, though it was showing the
822 challenges; (ii) I've removed the CR characters from the debug output for
825 PH/58 Allow for the insertion of a newline as well as a space when a string
826 is turned into more than one encoded-word during RFC 2047 encoding. The
827 Sieve code now uses this.
829 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
830 data_4xx, lost_connection, tls_required.
832 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
833 message was being sent as an SMTP response.
835 PH/61 Add -l and -k options to exicyclog.
837 PH/62 When verifying, if an address was redirected to one new address, so that
838 verification continued, and the new address failed or deferred after
839 having set something in $address_data, the value of $address_data was not
840 passed back to the ACL. This was different to the case when no
841 redirection occurred. The value is now passed back in both cases.
843 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
844 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
845 use login_cap.h, so on its own it isn't the distinguishing feature. The
846 new name refers directly to the setclassresources() function.
848 PH/65 Added configuration files for NetBSD3.
850 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
852 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
853 is preferred over IPv4.
855 PH/68 The bounce_return_message and bounce_return_body options were not being
856 honoured for bounces generated during the reception of non-SMTP messages.
857 In particular, this applied to messages rejected by the ACL. This bug has
858 been fixed. However, if bounce_return_message is true and bounce_return_
859 body is false, the headers that are returned for a non-SMTP message
860 include only those that have been read before the error was detected.
861 (In the case of an ACL rejection, they have all been read.)
863 PH/69 The HTML version of the specification is now built in a directory called
864 spec_html instead of spec.html, because the latter looks like a path with
865 a MIME-type, and this confuses some software.
867 PH/70 Catch two compiler warnings in sieve.c.
869 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
870 function verify_get_ident() calls ip_connect() to connect a socket, but
871 if the "connect()" function timed out, ip_connect() used to close the
872 socket. However, verify_get_ident() also closes the socket later, and in
873 between Exim writes to the log, which may get opened at this point. When
874 the socket was closed in ip_connect(), the log could get the same file
875 descriptor number as the socket. This naturally causes chaos. The fix is
876 not to close the socket in ip_connect(); the socket should be closed by
877 the function that creates it. There was only one place in the code where
878 this was missing, in the iplookup router, which I don't think anybody now
879 uses, but I've fixed it anyway.
881 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
882 well as to direct DNS lookups. Otherwise the handling of names in host
883 lists is inconsistent and therefore confusing.
889 PH/01 Two changes to the default runtime configuration:
891 (1) Move the checks for relay_from_hosts and authenticated clients from
892 after to before the (commented out) DNS black list checks.
894 (2) Add control=submission to the relay_from_hosts and authenticated
895 clients checks, on the grounds that messages accepted by these
896 statements are most likely to be submissions.
898 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
900 (1) Generate an error if the third argument for the ${prvs expansion is
903 (2) Treat a missing third argument of ${prvscheck as if it were an empty
906 (3) Reset the variables that are obtained from the first argument of
907 ${prvscheck and used in the second argument before leaving the code,
908 because their memory is reclaimed, so using them afterwards may do
911 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
912 one (it's much easier than Tom thought :-).
914 (5) Because of (4), we can now allow for the use of $prvscheck_result
915 inside the third argument.
917 PH/03 For some reason, the default setting of PATH when running a command from
918 a pipe transport was just "/usr/bin". I have changed it to
921 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
922 anything to be listed in the output from -bV.
924 PH/05 When a filter generated an autoreply, the entire To: header line was
925 quoted in the delivery log line, like this:
927 => >A.N.Other <ano@some.domain> <original@ddress> ...
929 This has been changed so that it extracts the operative address. There
930 may be more than one such address. If so, they are comma-separated, like
933 => >ano@some.domain,ona@other.domain <original@ddress> ...
935 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
936 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
937 not being looked up in the rDNS to get a host name, Exim was showing the
938 IP address twice in Received: lines, even though the IP addresses were
939 identical. For example:
941 Received: from [1.2.3.4] (helo=[1.2.3.4])
943 However, if the real host name was known, it was omitting the HELO data
944 if it matched the actual IP address. This has been tidied up so that it
945 doesn't show the same IP address twice.
947 PH/07 When both +timestamp and +memory debugging was on, the value given by
948 $tod_xxx expansions could be wrong, because the tod_stamp() function was
949 called by the debug printing, thereby overwriting the timestamp buffer.
950 Debugging no longer uses the tod_stamp() function when +timestamp is set.
952 PH/08 When the original message was included in an autoreply transport, it
953 always said "this is a copy of the message, including all the headers",
954 even if body_only or headers_only was set. It now gives an appropriate
957 PH/09 Applied a patch from the Sieve maintainer which:
959 o fixes some comments
960 o adds the (disabled) notify extension core
961 o adds some debug output for the result of if/elsif tests
962 o points to the current vacation draft in the documentation
963 and documents the missing references header update
967 o fixes a bug in processing the envelope test (when testing
968 multiple envelope elements, the last element determinted the
971 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
972 Electronic Mail") by including:
974 Auto-submitted: auto-generated
976 in the messages that it generates (bounce messages and others, such as
977 warnings). In the case of bounce messages for non-SMTP mesages, there was
978 also a typo: it was using "Auto_submitted" (underscore instead of
979 hyphen). Since every message generated by Exim is necessarily in response
980 to another message, thes have all been changed to:
982 Auto-Submitted: auto-replied
984 in accordance with these statements in the RFC:
986 The auto-replied keyword:
988 - SHOULD be used on messages sent in direct response to another
989 message by an automatic process,
991 - MUST NOT be used on manually-generated messages,
993 - MAY be used on Delivery Status Notifications (DSNs) and Message
994 Disposition Notifications (MDNs),
996 - MUST NOT be used on messages generated by automatic or periodic
997 processes, except for messages which are automatic responses to
1000 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1001 to the default Received: header definition.
1003 PH/12 Added log selector acl_warn_skipped (default on).
1005 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1006 variables because (a) they are in the wrong storage pool and (b) even if
1007 they were copied, it wouldn't work properly because of the caching.
1009 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1010 checking when decoding. Apparently there are clients that generate
1011 overlong encoded strings. Why am I not surprised?
1013 PH/15 If the first argument of "${if match_address" was not empty, but did not
1014 contain an "@" character, Exim crashed. Now it writes a panic log message
1015 and treats the condition as false.
1017 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1019 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1020 extension "envelope-auth". The code is finished and in agreement with
1021 other implementations, but there is no documentation so far and in fact,
1022 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1023 not changing the active code.
1025 Print executed "if" and "elsif" statements when debugging is used. This
1026 helps a great deal to understand what a filter does.
1028 Document more things not specified clearly in RFC3028. I had all this
1029 sorted out, when out of a sudden new issues came to my mind. Oops."
1031 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1034 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1035 canonical form (as documented). However, after a host name lookup from
1036 the IP address, check_host() was doing a simple string comparison with
1037 addresses acquired from the DNS when checking that the found name did
1038 have the original IP as one of its addresses. Since any found IPv6
1039 addresses are likely to be in abbreviated form, the comparison could
1040 fail. Luckily, there already exists a function for doing the comparison
1041 by converting both addresses to binary, so now that is used instead of
1042 the text comparison.
1044 PH/20 There was another similar case to PH/19, when a complete host name was
1045 given in a host list; looking up its IP address could give an abbreviated
1046 form, whereas the current host's name might or might not be abbreviated.
1047 The same fix has been applied.
1053 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1054 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1057 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1058 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1060 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1062 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1063 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1064 Also, for "Auto-Submitted", treat anything other than "no" as
1065 non-personal, in accordance with RFC 3834. (Previously it treated
1066 anything starting "auto-" as non-personal.)
1068 TF/01 The control=submission/name=... option had a problem with syntax
1069 errors if the name included a slash character. The /name= option
1070 now slurps the rest of the string, so it can include any characters
1071 but it must come last in the list of options (after /sender_retain
1074 PH/05 Some modifications to the interface to the fake nameserver for the new
1082 TK/01 Added the "success_on_redirect" address verification option. See
1083 NewStuff for rationale and an example.
1085 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1087 PH/02 Patch to exigrep to allow it to work on syslog lines.
1089 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1090 fread() to skip over the body file's header line, because in Cygwin the
1091 header line is locked and is inaccessible.
1093 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1094 co-exist for some time) to make it clear that it is the Exim ID that is
1095 referenced, not the Message-ID: header line.
1097 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1098 string_format() function, because snprintf() does not exist on all
1101 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1102 ${stat: expansion item.
1104 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1105 protocol synchronization error", to keep the pedants happy.
1107 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1108 well as for IRIX systems, when gcc is being used. See the host.c source
1111 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1113 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1116 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1117 transport and to the smtp transport in LMTP mode.
1119 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1121 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1122 run a filter in a subprocess. This could lead to confusion in subsequent
1123 lookups in the parent process. There should also be a search_tidyup() at
1124 the end of the subprocess.
1126 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1127 only if the host matched helo_try_verify_hosts, which caused the
1128 verification to occur when the EHLO/HELO command was issued. The ACL just
1129 tested the remembered result. Now, if a previous verification attempt has
1130 not happened, "verify = helo" does it there and then.
1132 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1134 TK/03 Fix log output including CR from clamd.
1136 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1137 exist provoked a memory error which could cause a segfault.
1139 PH/15 Installed PCRE 6.2
1141 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1143 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1144 of the problem. Specifically, suggested +O2 rather than +O1 for the
1147 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1149 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1150 record, the port was not correctly logged when the outgoing_port log
1151 selector was set (it logged the transort's default port).
1153 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1154 fallback_hosts, and "hosts" in the smtp transport.
1156 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1157 host errors such as "Connection refused".
1159 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1160 authentication with radiusclient 0.4.9:
1162 - Error returned from rc_read_config was caught wrongly
1163 - Username/password not passed on to radius server due to wrong length.
1165 The presumption is that some radiusclient API changes for 4.51/PH/17
1166 were not taken care of correctly. The code is still untested by me (my
1167 Linux distribution still has 0.3.2 of radiusclient), but it was
1168 contributed by a Radius user.
1170 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1171 expanding the "port" option of the smtp transport.
1173 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1174 while reading a MIME header. Thanks to Tom Hughes for a patch.
1176 PH/24 Include config.h inside local_scan.h so that configuration settings are
1179 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1180 that in an ACL for RCPT (for example), you can examine exactly what was
1183 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1184 commands, but it was not correctly comparing the address with the actual
1185 client host address. Thus, it would show the EHLO address in Received:
1186 header lines when this was not necessary.
1188 PH/27 Added the % operator to ${eval:}.
1190 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1191 it should be ignoring failures (because with -C, for example, it has lost
1192 privilege). It wasn't ignoring creation failures other than "already
1195 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1198 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1199 because an input line was too long, either on its own, or by virtue of
1200 too many continuations, the temporary file was not being removed, and the
1201 return code was incorrect.
1203 PH/31 Missing "BOOL" in function definition in filtertest.c.
1205 PH/32 Applied Sieve patches from the maintainer.
1207 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1209 PH/33 Added "verify = not_blind".
1211 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1212 Local/Makefile (with some defaults set). These are used in built scripts
1213 such as exicyclog, but they have never been used in the exim_install
1214 script (though there are many overriding facilities there). I have
1215 arranged that the exim_install script now takes note of these two
1218 PH/35 Installed configuration files for Dragonfly.
1220 PH/36 When a locally submitted message by a trusted user did not contain a
1221 From: header, and the sender address was obtained from -f or from an SMTP
1222 MAIL command, and the trusted user did not use -F to supply a sender
1223 name, $originator_name was incorrectly used when constructing a From:
1224 header. Furthermore, $originator_name was used for submission mode
1225 messages from external hosts without From: headers in a similar way,
1226 which is clearly wrong.
1228 PH/37 Added control=suppress_local_fixups.
1230 PH/38 When log_selector = +received_sender was set, and the addition of the
1231 sender made the log line's construction buffer exactly full, or one byte
1232 less than full, an overflow happened when the terminating "\n" was
1235 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1236 when the result of a list match is failure because a DNS lookup failed.
1238 PH/40 RM_COMMAND is now used in the building process.
1240 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1241 the "build-* directories that it finds.
1243 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1244 address in a domain literal was a prefix of an interface address.
1246 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1247 when verifying a sender address, unless rewrite_headers is false.
1249 PH/44 Wrote a long comment about why errors_to addresses are verified as
1250 recipients, not senders.
1252 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1253 the ratelimit ACL was added.
1255 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1257 PH/46 Added extra information about PostgreSQL errors to the error string.
1259 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1260 avoiding the need to install special zones in a real server. This is
1261 backwards compatible; if it can't find the fake resolver, it drops back.
1262 Thus, both old and new test suites can be run.
1264 TF/02 Added util/ratelimit.pl
1266 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1267 clock is set back in time.
1269 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1270 Candler <B.Candler@pobox.com>.
1272 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1273 OK for addresses that are the result of redirections.
1275 PH/48 A number of further additions for the benefit of the new test suite,
1276 including a fake gethostbyname() that interfaces to the fake DNS resolver
1279 TF/06 The fix for widen_domains has also been applied to qualify_single and
1280 search_parents which are the other dnslookup options that can cause
1283 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1286 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1288 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1289 service" if it encountered an MX record with an empty target hostname.
1290 The message is now "an MX or SRV record indicated no SMTP service".
1292 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1293 if the DNS of the sending site is misconfigured. This is quite a
1294 common situation. This change restores the behaviour of treating a
1295 helo verification defer as a failure.
1297 PH/51 If self=fail was set on a router, the bounce message did not include the
1298 actual error message.
1304 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1306 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1307 command itself ended in error, the underlying message about the transport
1308 filter timeout was being overwritten with the pipe command error. Now the
1309 underlying error message should be appended to the second error message.
1311 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1313 PH/02 Reduce the amount of output that "make" produces by default. Full output
1314 can still be requested.
1316 PH/03 The warning log line about a condition test deferring for a "warn" verb
1317 was being output only once per connection, rather than after each
1318 occurrence (because it was using the same function as for successful
1319 "warn" verbs). This seems wrong, so I have changed it.
1321 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1322 it should not have, which might have caused a crash in the right
1323 circumstances, but probably never did.
1325 PH/04 Installed a modified version of Tony Finch's patch to make submission
1326 mode fix the return path as well as the Sender: header line, and to
1327 add a /name= option so that you can make the user's friendly name appear
1330 TF/03 Added the control = fakedefer ACL modifier.
1332 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1333 Mark Lowes for thorough testing.
1335 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1337 TK/03 Merged latest SRS patch from Miles Wilton.
1339 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1340 with the definition in sysexits.h (which is #included earlier).
1341 Fortunately, Exim does not actually use EX_OK. The code used to try to
1342 preserve the sysexits.h value, by assumimg that macro definitions were
1343 scanned for macro replacements. I have been disabused of this notion,
1344 so now the code just undefines EX_OK before #including unistd.h.
1346 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1347 in the smtp transport. When a block could not be written in a single
1348 write() function, the timeout was being re-applied to each part-write.
1349 This seems wrong - if the receiver was accepting one byte at a time it
1350 would take for ever. The timeout is now adjusted when this happens. It
1351 doesn't have to be particularly precise.
1353 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1354 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1356 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1357 without a domain if the check to <postmaster@domain> fails.
1359 SC/01 Eximstats: added -xls and the ability to specify output files
1360 (patch written by Frank Heydlauf).
1362 SC/02 Eximstats: use FileHandles for outputing results.
1364 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1366 SC/04 Eximstats: fixed display of large numbers with -nvr option
1368 SC/05 Eximstats: fixed merging of reports with empty tables.
1370 SC/06 Eximstats: added the -include_original_destination flag
1372 SC/07 Eximstats: removed tabs and trailing whitespace.
1374 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1376 TK/06 MBOX spool code: Add real "From " MBOX separator line
1377 so the .eml file is really in mbox format (even though
1378 most programs do not really care). Patch from Alex Miller.
1380 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1381 The latter is generated from $received_to and is only set if the
1382 message has one envelope recipient. SA can use these headers,
1383 obviously out-of-the-box. Patch from Alex Miller.
1385 PH/08 The ${def test on a variable was returning false if the variable's
1386 value was "0", contrary to what the specification has always said!
1387 The result should be true unless the variable is empty.
1389 PH/09 The syntax error of a character other than { following "${if
1390 def:variable_name" (after optional whitespace) was not being diagnosed.
1391 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1392 accidental colon was present, for example, could give incorrect results.
1394 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1395 result is used (not including appendfile, where other changes are about
1398 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1399 This involved changing a lot of size variables from int to off_t. It
1400 should work with maildirs and everything.
1402 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1403 spamd dying while we are connected to it.
1405 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1408 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1409 function for BDB 4.3.
1411 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1413 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1414 the sources for PCRE have been re-arranged and more files are now
1417 PH/15 The code I had for printing potentially long long variables in PH/11
1418 above was not the best (it lost precision). The length of off_t variables
1419 is now inspected at build time, and an appropriate printing format (%ld
1420 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1421 to be "long long int" or "long int". This is needed for the internal
1422 formatting function string_vformat().
1424 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1425 the configuration file to be ":syslog", then the script "guesses" where
1426 the logs files are, rather than using the compiled in default. In our
1427 case the guess is not the same as the compiled default, so the script
1428 suddenly stopped working when I started to use syslog. The patch checks
1429 to see if log_file_path is "". If so, it attempts to read it from exim
1430 with no configuration file to get the compiled in version, before it
1431 falls back to the previous guessing code."
1433 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1434 implementing BATV in an Exim configuration. See NewStuff for the gory
1437 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1438 Makefile that are specific to HP-UX.
1440 PH/18 If the "use_postmaster" option was set for a recipient callout together
1441 with the "random" option, the postmaster address was used as the MAIL
1442 FROM address for the random test, but not for the subsequent recipient
1443 test. It is now used for both.
1445 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1446 patch removes a few documentation additions to RFC 3028, because the
1447 latest draft now contains them. It adds the new en;ascii-case comparator
1448 and a new error check for 8bit text in MIME parts. Comparator and
1449 require names are now matched exactly. I enabled the subaddress
1450 extension, but it is not well tested yet (read: it works for me)."
1452 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1453 rework some of the code of TK/09 above to avoid the hardwired use of
1454 "%lld" and "long long". Replaced the call to snprintf() with a call to
1457 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1458 records point to non-existent hosts", "retry timeout exceeded", and
1459 "retry time not reached for any host after a long failure period".
1461 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1462 experimental DomainKeys support:
1464 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1465 (2) On an error such as an illegally used "control", the wrong name for
1466 the control was given.
1468 These problems did NOT occur unless DomainKeys support was compiled.
1470 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1472 PH/24 Added ${if match_ip condition.
1474 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1475 databases so that it will be absolutely obvious if a crash occurs in the
1476 DB library. This is a regular occurrence (often caused by mis-matched
1479 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1480 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1481 picked up on a user's system that detects such things. There doesn't seem
1482 to be a gcc warning option for this - only an attribute that has to be
1483 put on the function's prototype. It seems that in Fedora Core 4 they have
1484 set this on a number of new functions. No doubt there will be more in due
1487 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1488 specify a transport. However, if an address that was verified by such a
1489 router was the subject of a callout, Exim crashed because it tried to
1490 read the rcpt_include_affixes from the non-existent transport. Now it
1491 just assumes that the setting of that option is false. This bug was
1492 introduced by 4.51/PH/31.
1494 PH/28 Changed -d+all to exclude +memory, because that information is very
1495 rarely of interest, but it makes the output a lot bigger. People tend to
1496 do -d+all out of habit.
1498 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1499 code in os-type was giving problems when libc.so lives in lib64, like on
1502 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1503 aren't the modern standard, and it seems that some systems' include files
1504 don't always have them. Exim was already checking for some of the newer
1505 ones like T_AAAA, and defining it itself. I've added checks for all the
1506 record types that Exim uses.
1508 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1509 not automatically generating a new one, as it is supposed to. This
1510 prevented TLS from working. If the file did exist, but contained invalid
1511 data, a new version was generated, as expected. It was only the case of a
1512 non-existent file that was broken.
1514 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1515 with a change in libdomainkeys > 0.64.
1517 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1518 from DNS. If the selector record carries the flag, it now has
1519 precedence over the domain-wide flag.
1521 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1523 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1524 the use of a port name that isn't defined in /etc/services) occurred, the
1525 message was deferred as in a normal delivery, and thus remained on the
1526 spool, instead of being failed because of the mua_wrapper setting. This
1527 is now fixed, and I tidied up some of the mua_wrapper messages at the
1530 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1531 the messages in a hash of arrays rather than using individual hashes.
1532 This is a bit cleaner and results in dramatic memory savings, albeit
1533 at a slight CPU cost.
1535 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1536 as requested by Marc Sherman.
1538 SC/10 Eximstats: added histograms for user specified patterns as requested
1541 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1543 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1544 fopen() in the content-scanning modules that did not already have it.
1550 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1551 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1553 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1555 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1557 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1558 to test Sieve filters that use "vacation".
1560 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1561 that changes the way the GnuTLS parameters are stored in the cache file.
1562 The new format can be generated externally. For backward compatibility,
1563 if the data in the cache doesn't make sense, Exim assumes it has read an
1564 old-format file, and it generates new data and writes a new file. This
1565 means that you can't go back to an older release without removing the
1568 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1569 work if there are any delivery delays because "one_time" forces the
1570 parent to be marked "delivered", so its unseen clone is never tried
1571 again. For this reason, Exim now forbids the simultaneous setting of
1574 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1575 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1576 entry if you want to know the details. The fix, however, neglected to
1577 consider the case when local delivery batching is involved. The test for
1578 "previously delivered" was not happening when checking to see if an
1579 address could be batched with a previous (undelivered) one; under
1580 certain circumstances this could lead to multiple deliveries to the same
1583 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1584 in its include files, and this causes problems building Exim.
1586 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1587 header_syntax) but Exim was just ignoring anything given after a slash.
1588 In particular, this caused confusion with an attempt to use "verify =
1589 reverse_host_lookup/defer_ok". An error is now given when options are
1590 supplied for verify items that do not have them. (Maybe reverse_host_
1591 lookup should have a defer_ok option, but that's a different point.)
1593 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1594 defined by RFC 821) to 2048, because there were problems with some AUTH
1595 commands, and RFC 1869 says the size should be increased for extended
1596 SMTP commands that take arguments.
1598 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1601 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1602 "unknown" error; now it says that the functionality isn't in the binary.
1604 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1605 an address' error message when a string expansion fails (syntax or
1606 whatever). Otherwise the password may appear in the log. Following change
1607 PH/42 below, there is no longer a chance of it appearing in a bounce
1610 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1612 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1613 of its addresses was ever tried. (Bugzilla bug #2.)
1615 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1616 the result incorrectly in the debug output. (It correctly added a newline
1617 to what was transported.)
1619 TF/01 Added $received_time.
1621 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1622 commented out examples of how to interface to a virus scanner and to
1623 SpamAssassin. Also added commented examples of av_scanner and
1624 spamd_address settings.
1626 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1627 and controls are allowed in which ACLs. There were a couple of minor
1628 errors. Some of the entries in the conditions table (which is a table of
1629 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1630 negation of where the condition IS allowed.
1632 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1634 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1635 header file does not have a version number, so I've had to invent a new
1636 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1637 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1638 radiusclient), but it was contributed by a Radius user.
1640 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1641 files or directories, for OpenSSL.
1643 PH/19 When an Exim process that is running as root has to create an Exim log
1644 file, it does so in a subprocess that runs as exim:exim so as to get the
1645 ownership right at creation (otherwise, other Exim processes might see
1646 the file with the wrong ownership). There was no test for failure of this
1647 fork() call, which would lead to the process getting stuck as it waited
1648 for a non-existent subprocess. Forks do occasionally fail when resources
1649 run out. I reviewed all the other calls to fork(); they all seem to check
1652 PH/20 When checking for unexpected SMTP input at connect time (before writing
1653 the banner), Exim was not dealing correctly with a non-positive return
1654 from the read() function. If the client had disconnected by this time,
1655 the result was a log entry for a synchronization error with an empty
1656 string after "input=" when read() returned zero. If read() returned -1
1657 (an event I could not check), uninitialized data bytes were printed.
1658 There were reports of junk text (parts of files, etc) appearing after
1661 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1663 PH/22 Added support for macro redefinition, and (re)definition in between
1664 driver and ACL definitions.
1666 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1667 forgetting to use the resulting value; it was using the unexpanded value.
1669 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1670 hadn't been configured. The fix is from Juergen Kreileder, who
1671 understands it better than I do:
1673 "Here's what I see happening with three configured cyrus_sasl
1674 authenticators configured (plain, login, cram-md5):
1676 On startup auth_cyrus_sasl_init() gets called for each of these.
1677 This means three calls to sasl_listmech() without a specified mech_list.
1678 => SASL tests which mechs of all available mechs actually work
1679 => three warnings about OTP not working
1680 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1682 With the patch, sasl_listmech() also gets called three times. But now
1683 SASL's mech_list option is set to the server_mech specified in the the
1684 authenticator. Or in other words, the answer from sasl_listmech()
1685 gets limited to just the mech you're testing for (which is different
1687 => the return list contains just 'plain' or 'login', 'cram-md5' or
1688 nothing depending on the value of ob->server_mech.
1690 I've just tested the patch: Authentication still works fine,
1691 unavailable mechs specified in the exim configuration are still
1692 caught, and the auth.log warnings about OTP are gone."
1694 PH/25 When debugging is enabled, the contents of the command line are added
1695 to the debugging output, even when log_selector=+arguments is not
1698 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1699 answer is "GNU", and only if the return is "GNU/something" is the answer
1702 PH/27 $acl_verify_message is now set immediately after the failure of a
1703 verification in an ACL, and so is available in subsequent modifiers. In
1704 particular, the message can be preserved by coding like this:
1706 warn !verify = sender
1707 set acl_m0 = $acl_verify_message
1709 Previously, $acl_verify_message was set only while expanding "message"
1710 and "log_message" when a very denied access.
1712 PH/28 Modified OS/os.c-Linux with
1714 -#ifndef OS_LOAD_AVERAGE
1715 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1717 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1718 nomenclature these days.)
1720 PH/29 Installed patch from the Sieve maintainer that adds the options
1721 sieve_useraddress and sieve_subaddress to the redirect router.
1723 PH/30 In these circumstances:
1724 . Two addresses routed to the same list of hosts;
1725 . First host does not offer TLS;
1726 . First host accepts first address;
1727 . First host gives temporary error to second address;
1728 . Second host offers TLS and a TLS session is established;
1729 . Second host accepts second address.
1730 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1731 and peerdn, if requested) that were in fact used only for the second
1734 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1735 attention to any local part prefix or suffix that was matched by the
1736 router that accepted the address. It now behaves in the same way as it
1737 does for delivery: the affixes are removed from the local part unless
1738 rcpt_include_affixes is set on the transport.
1740 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1741 timeout during the DATA phase of an incoming message.
1743 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1744 applied a patch sanctioned by the Sieve maintainer.
1746 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1747 the uid or gid is negative. A case of a negative gid caused this to be
1748 noticed. The fix allows for either to be negative.
1750 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1751 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1754 PH/36 The change PH/12 above was broken. Fixed it.
1756 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1757 the grounds that routing the same address twice would always produce the
1758 same answer. This might have been true once, but it is certainly no
1759 longer true now. Routing a child address may depend on the previous
1760 routing that produced that child. Some complicated redirection strategies
1761 went wrong when messages had multiple recipients, and made Exim's
1762 behaviour dependent on the order in which the addresses were given.
1764 I have moved the duplicate checking until after the routing is complete.
1765 Exim scans the addresses that are assigned to local and remote
1766 transports, and removes any duplicates. This means that more work will be
1767 done, as duplicates will always all be routed, but duplicates are
1768 presumably rare, so I don't expect this is of any significance.
1770 For deliveries to pipes, files, and autoreplies, the duplicate checking
1771 still happens during the routing process, since they are not going to be
1774 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1775 It corrects a timeout issue with spamd. This is Ian's comment: "The
1776 background is that sometimes spamd either never reads data from a
1777 connection it has accepted, or it never writes response data. The exiscan
1778 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1779 blindly assumes that writes won't block so it may never time out."
1781 PH/39 Allow G after quota size as well as K and M.
1783 PH/40 The value set for $authenticated_id in an authenticator may not contain
1784 binary zeroes or newlines because the value is written to log lines and
1785 to spool files. There was no check on this. Now the value is run through
1786 the string_printing() function so that such characters are converted to
1787 printable escape sequences.
1789 PH/41 $message_linecount is a new variable that contains the total number of
1790 lines in the message. Compare $body_linecount, which is the count for the
1793 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1794 bounce and delay warning messages, except in certain special cases, which
1797 (a) An SMTP error message from a remote host;
1798 (b) A message specified in a :fail: redirection;
1799 (c) A message specified in a "fail" command in a system filter;
1800 (d) A message specified in a FAIL return from the queryprogram router;
1801 (e) A message specified by the cannot_route_message router option.
1803 In these cases only, Exim does include the error details in bounce and
1804 warning messages. There are also a few cases where bland messages such
1805 as "unrouteable address" or "local delivery error" are given.
1807 PH/43 $value is now also set for the "else" part of a ${run expansion.
1809 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1810 being worked on, but at least Exim now implements the latest version to
1813 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1814 process to complete was treated as a delivery failure, a timeout while
1815 writing the message to the pipe was logged, but erroneously treated as a
1816 successful delivery. Such timeouts include transport filter timeouts. For
1817 consistency with the overall process timeout, these timeouts are now
1818 treated as errors, giving rise to delivery failures by default. However,
1819 there is now a new Boolean option for the pipe transport called
1820 timeout_defer, which, if set TRUE, converts the failures into defers for
1821 both kinds of timeout. A transport filter timeout is now identified in
1824 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1825 systems where "make" and "gmake" are different, calling "gmake" at top
1826 level broke things. I've arranged for the value of $(MAKE) to be passed
1827 from the Makefile to this script so that it can call the same version of
1831 A note about Exim versions 4.44 and 4.50
1832 ----------------------------------------
1834 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1835 changes of various kinds. As a consequence, a big documentation update was
1836 needed. This delayed the release for rather longer than seemed good, especially
1837 in the light of a couple of (minor) security issues. Therefore, the changes
1838 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1839 release. So 4.44 and 4.50 are in effect two different branches that both start
1842 I have left the 4.50 change log unchanged; it contains all the changes since
1843 4.43. The change log for 4.44 is below; many of its items are identical to
1844 those for 4.50. This seems to be the most sensible way to preserve the
1845 historical information.
1851 1. Minor wording change to the doc/README.SIEVE file.
1853 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1854 computation of the current number of files was incorrect.
1856 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1857 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1860 4. Give more explanation in the error message when the command for a transport
1861 filter fails to execute.
1863 5. There are several places where Exim runs a non-Exim command in a
1864 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1865 was being done only for the command run by the queryprogram router. It is
1866 now done for all such subprocesses. The other cases are: ${run, transport
1867 filters, and the commands run by the lmtp and pipe transports.
1869 6. Added CONFIGURE_GROUP build-time option.
1871 7. Some older OS have a limit of 256 on the maximum number of file
1872 descriptors. Exim was using setrlimit() to set 1000 as a large value
1873 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1874 systems. I've change it so that if it can't get 1000, it tries for 256.
1876 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1877 was an oversight, and furthermore, ever since the addition of extra
1878 controls (e.g. 4.43/32), the checks on when to allow different forms of
1879 "control" were broken. There should now be diagnostics for all cases when a
1880 control that does not make sense is encountered.
1882 9. Added the /retain_sender option to "control=submission".
1884 10. $recipients is now available in the predata ACL (oversight).
1886 11. Tidy the search cache before the fork to do a delivery from a message
1887 received from the command line. Otherwise the child will trigger a lookup
1888 failure and thereby defer the delivery if it tries to use (for example) a
1889 cached ldap connection that the parent has called unbind on.
1891 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1892 of $address_data from the recipient verification was clobbered by the
1893 sender verification.
1895 13. The value of address_data from a sender verification is now available in
1896 $sender_address_data in subsequent conditions in the ACL statement.
1898 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1900 15. Added a new option "connect=<time>" to callout options, to set a different
1903 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1904 was its contents. (It was OK if the option was not defined at all.)
1906 17. A "Completed" log line is now written for messages that are removed from
1907 the spool by the -Mrm option.
1909 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1910 information about exactly what failed.
1912 19. Added -dd to debug only the daemon process.
1914 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1915 handles timeouts, both on the server side and network timeouts. Renamed the
1916 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1918 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1919 It is now set to "smtps".
1921 22. $host_address is now set to the target address during the checking of
1922 ignore_target_hosts.
1924 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1925 being passed; this would have caused $sender_host_name to have been used if
1926 matching the list had actually called for a host name (not very likely,
1927 since this list is usually IP addresses). A host name is now passed as
1930 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1931 code that specifies a non-restarting handler (typically sigaction() in
1932 modern systems) in an attempt to fix a rare and obscure crash bug.
1934 25. Narrowed the window for a race in the daemon that could cause it to ignore
1935 SIGCHLD signals. This is not a major problem, because they are used only to
1936 wake it up if nothing else does.
1938 26. A malformed maildirsize file could cause Exim to calculate negative values
1939 for the mailbox size or file count. Odd effects could occur as a result.
1940 The maildirsize information is now recalculated if the size or filecount
1943 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1944 support for a long time. Removed HAVE_SYS_VFS_H.
1946 28. Installed the latest version of exipick from John Jetmore.
1948 29. In an address list, if the pattern was not a regular expression, an empty
1949 subject address (from a bounce message) matched only if the pattern was an
1950 empty string. Non-empty patterns were not even tested. This was the wrong
1951 because it is perfectly reasonable to use an empty address as part of a
1952 database query. An empty address is now tested by patterns that are
1953 lookups. However, all the other forms of pattern expect the subject to
1954 contain a local part and a domain, and therefore, for them, an empty
1955 address still always fails if the pattern is not itself empty.
1957 30. Exim went into a mad DNS loop when attempting to do a callout where the
1958 host was specified on an smtp transport, and looking it up yielded more
1959 than one IP address.
1961 31. Re-factored the code for checking spool and log partition space into a
1962 function that finds that data and another that does the check. The former
1963 is then used to implement four new variables: $spool_space, $log_space,
1964 $spool_inodes, and $log_inodes.
1966 32. The RFC2047 encoding function was originally intended for short strings
1967 such as real names; it was not keeping to the 75-character limit for
1968 encoded words that the RFC imposes. It now respects the limit, and
1969 generates multiple encoded words if necessary. To be on the safe side, I
1970 have increased the buffer size for the ${rfc2047: expansion operator from
1973 33. It is now permitted to omit both strings after an "if" condition; if the
1974 condition is true, the result is "true". As before, when the second string
1975 is omitted, a false condition yields an empty string. This makes it less
1976 cumbersome to write custom ACL and router conditions.
1978 34. Failure to deliver a bounce message always caused it to be frozen, even if
1979 there was an errors_to setting on the router. The errors_to setting is now
1982 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1983 canonical form (fully expanded) before being placed in
1984 $sender_host_address.
1986 36. The table in the code that translates DNS record types into text (T_A to
1987 "A" for instance) was missing entries for NS and CNAME. It is just possible
1988 that this could have caused confusion if both these types were looked up
1989 for the same domain, because the text type is used as part of Exim's
1990 per-process caching. But the chance of anyone hitting this buglet seems
1993 37. The dnsdb lookup has been extended in a number of ways.
1995 (1) There is a new type, "zns", which walks up the domain tree until it
1996 finds some nameserver records. It should be used with care.
1998 (2) There is a new type, "mxh", which is like "mx" except that it returns
1999 just the host names, not the priorities.
2001 (3) It is now possible to give a list of domains (or IP addresses) to be
2002 looked up. The behaviour when one of the lookups defers can be
2003 controlled by a keyword.
2005 (4) It is now possible to specify the separator character for use when
2006 multiple records are returned.
2008 38. The dnslists ACL condition has been extended: it is now possible to supply
2009 a list of IP addresses and/or domains to be looked up in a particular DNS
2012 39. Added log_selector=+queue_time_overall.
2014 40. When running the queue in the test harness, wait just a tad after forking a
2015 delivery process, to get repeatability of debugging output.
2017 41. Include certificate and key file names in error message when GnuTLS fails
2018 to set them up, because the GnuTLS error message doesn't include the name
2019 of the failing file when there is a problem reading it.
2021 42. Allow both -bf and -bF in the same test run.
2023 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2025 44. The "Exiscan patch" is now merged into the mainline Exim source.
2027 45. Sometimes the final signoff response after QUIT could fail to get
2028 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2029 < 0 before doing a fflush(). This bug looks as though it goes back to the
2030 introduction of TLS in release 3.20, but "sometimes" must have been rare
2031 because the tests only now provoked it.
2033 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2034 (this can affect the format of dates).
2036 47. exim_tidydb, when checking for the continued existence of a message for
2037 which it has found a message-specific retry record, was not finding
2038 messages that were in split spool directories. Consequently, it was
2039 deleting retry records that should have stayed in existence.
2041 48. Steve fixed some bugs in eximstats.
2043 49. The SPA authentication driver was not abandoning authentication and moving
2044 on to the next authenticator when an expansion was forced to fail,
2045 contradicting the general specification for all authenticators. Instead it
2046 was generating a temporary error. It now behaves as specified.
2048 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2049 (the order specifies the preference for clients). The order is now AES256,
2050 AES128, 3DES, ARCFOUR128.
2052 51. Small patch to Sieve code - explicitly set From: when generating an
2055 52. Exim crashed if a remote delivery caused a very long error message to be
2056 recorded - for instance if somebody sent an entire SpamAssassin report back
2057 as a large number of 550 error lines. This bug was coincidentally fixed by
2058 increasing the size of one of Exim's internal buffers (big_buffer) that
2059 happened as part of the Exiscan merge. However, to be on the safe side, I
2060 have made the code more robust (and fixed the comments that describe what
2063 53. Now that there can be additional text after "Completed" in log lines (if
2064 the queue_time_overall log selector is set), a one-byte patch to exigrep
2065 was needed to allow it to recognize "Completed" as not the last thing in
2068 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2069 patch that reportedly fixes this has been added. I am not expert enough to
2070 create a test for it. This is what the patch creator wrote:
2072 "I found a little strange behaviour of ldap code when working with
2073 Windows 2003 AD Domain, where users was placed in more than one
2074 Organization Units. When I tried to give exim partial DN, the exit code
2075 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2076 But simultaneously result of request was absolutely normal ldap result,
2077 so I produce this patch..."
2079 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2080 REFERENCE, so I have modified the code to exclude the patch when that macro
2083 55. Some experimental protocols are using DNS PTR records for new purposes. The
2084 keys for these records are domain names, not reversed IP addresses. The
2085 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2086 leaves it alone. Component reversal etc. now happens only for IP addresses.
2089 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2091 57. Double the size of the debug message buffer (to 2048) so that more of very
2092 long debug lines gets shown.
2094 58. The exicyclog utility now does better if the number of log files to keep
2095 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2097 59. Two changes related to the smtp_active_hostname option:
2099 (1) $smtp_active_hostname is now available as a variable.
2100 (2) The default for smtp_banner uses $smtp_active_hostname instead
2101 of $primary_hostname.
2103 60. The host_aton() function is supposed to be passed a string that is known
2104 to be a valid IP address. However, in the case of IPv6 addresses, it was
2105 not checking this. This is a hostage to fortune. Exim now panics and dies
2106 if the condition is not met. A case was found where this could be provoked
2107 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2108 components; fortuitously, this particular loophole had already been fixed
2109 by change 4.50/55 above.
2111 If there are any other similar loopholes, the new check in host_aton()
2112 itself should stop them being exploited. The report I received stated that
2113 data on the command line could provoke the exploit when Exim was running as
2114 exim, but did not say which command line option was involved. All I could
2115 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2116 running as the user.
2119 61. There was a buffer overflow vulnerability in the SPA authentication code
2120 (which came originally from the Samba project). I have added a test to the
2121 spa_base64_to_bits() function which I hope fixes it.
2124 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2125 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2127 63. The daemon start-up calls getloadavg() while still root for those OS that
2128 need the first call to be done as root, but it missed one case: when
2129 deliver_queue_load_max is set with deliver_drop_privilege. This is
2130 necessary for the benefit of the queue runner, because there is no re-exec
2131 when deliver_drop_privilege is set.
2133 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2134 This has been fixed.
2136 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2137 was in use, was not putting the data itself into the right store pool;
2138 consequently, it could be overwritten for a subsequent message in the same
2139 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2142 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2144 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2145 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2146 the function were treating the return as a boolean value, which happened to
2147 work because 0=false and not-0=true, but is not correct code.
2149 68. The host_aton() function was not handling scoped IPv6 addresses (those
2150 with, for example, "%eth0" on the end) correctly.
2152 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2153 negated items (that is, ~something) in unsigned ints. Some compilers
2154 apparently mutter when there is no cast.
2156 70. If an address verification called from an ACL failed, and did not produce a
2157 user-specific message (i.e. there was only a "system" message), nothing was
2158 put in $acl_verify_message. In this situation, it now puts the system
2161 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2162 session; change 4.31/43 added the unwanted input to the log line - except
2163 that it did not do this in the start of session case. It now does.
2165 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2166 This is wrong and can cause the other end to generate a synchronization
2167 error if it is another Exim or anything else that does the synchronization
2168 check. A QUIT command is no longer sent after a timeout.
2170 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2171 during host lookups.
2173 74. The defer_ok option of callout verification was not working if it was used
2174 when verifying addresses in header lines, that is, for this case:
2176 verify = header_sender/callout=defer_ok
2178 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2179 those file descriptors could be used for SMTP connections. If anything
2180 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2181 could be sent to the SMTP client, causing chaos. The daemon now opens
2182 stdin, stdout, and stderr to /dev/null when it puts itself into the
2185 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2186 log by default. The user can override this with suitable Perl magic.
2188 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2189 the log message when discard triggers, was not working for the DATA ACL or
2190 for the non-SMTP ACL.
2192 78. Error message wording change in sieve.c.
2194 79. If smtp_accept_max_per_host was set, the number of connections could be
2195 restricted to fewer than expected, because the daemon was trying to set up
2196 a new connection before checking whether the processes handling previous
2197 connections had finished. The check for completed processes is now done
2198 earlier. On busy systems, this bug wouldn't be noticed because something
2199 else would have woken the daemon, and it would have reaped the completed
2202 80. If a message was submitted locally by a user whose login name contained one
2203 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2204 It caused a spool format error. I have fixed the spool reading code. A
2205 related problem was that the "from" clause in the Received: line became
2206 illegal because of the space(s). It is now covered by ${quote_local_part.
2208 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2211 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2213 83. Patch from Sieve maintainer to fix unterminated string problem in
2214 "vacation" handling.
2216 84. Some minor changes to the Linux configuration files to help with other
2217 OS variants using glibc.
2219 85. One more patch for Sieve to update vacation handling to latest spec.
2222 ----------------------------------------------------
2223 See the note above about the 4.44 and 4.50 releases.
2224 ----------------------------------------------------
2230 1. Change 4.43/35 introduced a bug that caused file counts to be
2231 incorrectly computed when quota_filecount was set in an appendfile
2234 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2235 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2238 3. Give more explanation in the error message when the command for a transport
2239 filter fails to execute.
2241 4. There are several places where Exim runs a non-Exim command in a
2242 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2243 was being done only for the command run by the queryprogram router. It is
2244 now done for all such subprocesses. The other cases are: ${run, transport
2245 filters, and the commands run by the lmtp and pipe transports.
2247 5. Some older OS have a limit of 256 on the maximum number of file
2248 descriptors. Exim was using setrlimit() to set 1000 as a large value
2249 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2250 systems. I've change it so that if it can't get 1000, it tries for 256.
2252 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2253 was an oversight, and furthermore, ever since the addition of extra
2254 controls (e.g. 4.43/32), the checks on when to allow different forms of
2255 "control" were broken. There should now be diagnostics for all cases when a
2256 control that does not make sense is encountered.
2258 7. $recipients is now available in the predata ACL (oversight).
2260 8. Tidy the search cache before the fork to do a delivery from a message
2261 received from the command line. Otherwise the child will trigger a lookup
2262 failure and thereby defer the delivery if it tries to use (for example) a
2263 cached ldap connection that the parent has called unbind on.
2265 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2266 of $address_data from the recipient verification was clobbered by the
2267 sender verification.
2269 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2270 was its contents. (It was OK if the option was not defined at all.)
2272 11. A "Completed" log line is now written for messages that are removed from
2273 the spool by the -Mrm option.
2275 12. $host_address is now set to the target address during the checking of
2276 ignore_target_hosts.
2278 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2279 being passed; this would have caused $sender_host_name to have been used if
2280 matching the list had actually called for a host name (not very likely,
2281 since this list is usually IP addresses). A host name is now passed as
2284 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2285 code that specifies a non-restarting handler (typically sigaction() in
2286 modern systems) in an attempt to fix a rare and obscure crash bug.
2288 15. Narrowed the window for a race in the daemon that could cause it to ignore
2289 SIGCHLD signals. This is not a major problem, because they are used only to
2290 wake it up if nothing else does.
2292 16. A malformed maildirsize file could cause Exim to calculate negative values
2293 for the mailbox size or file count. Odd effects could occur as a result.
2294 The maildirsize information is now recalculated if the size or filecount
2297 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2298 support for a long time. Removed HAVE_SYS_VFS_H.
2300 18. Updated exipick to current release from John Jetmore.
2302 19. Allow an empty sender to be matched against a lookup in an address list.
2303 Previously the only cases considered were a regular expression, or an
2306 20. Exim went into a mad DNS lookup loop when doing a callout where the
2307 host was specified on the transport, if the DNS lookup yielded more than
2310 21. The RFC2047 encoding function was originally intended for short strings
2311 such as real names; it was not keeping to the 75-character limit for
2312 encoded words that the RFC imposes. It now respects the limit, and
2313 generates multiple encoded words if necessary. To be on the safe side, I
2314 have increased the buffer size for the ${rfc2047: expansion operator from
2317 22. Failure to deliver a bounce message always caused it to be frozen, even if
2318 there was an errors_to setting on the router. The errors_to setting is now
2321 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2322 canonical form (fully expanded) before being placed in
2323 $sender_host_address.
2325 24. Updated eximstats to version 1.33
2327 25. Include certificate and key file names in error message when GnuTLS fails
2328 to set them up, because the GnuTLS error message doesn't include the name
2329 of the failing file when there is a problem reading it.
2331 26. Expand error message when OpenSSL has problems setting up cert/key files.
2334 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2335 (this can affect the format of dates).
2337 28. exim_tidydb, when checking for the continued existence of a message for
2338 which it has found a message-specific retry record, was not finding
2339 messages that were in split spool directories. Consequently, it was
2340 deleting retry records that should have stayed in existence.
2342 29. eximstats updated to version 1.35
2343 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2344 1.35 - bugfix such that pie charts by volume are generated correctly
2346 30. The SPA authentication driver was not abandoning authentication and moving
2347 on to the next authenticator when an expansion was forced to fail,
2348 contradicting the general specification for all authenticators. Instead it
2349 was generating a temporary error. It now behaves as specified.
2351 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2352 (the order specifies the preference for clients). The order is now AES256,
2353 AES128, 3DES, ARCFOUR128.
2355 31. Small patch to Sieve code - explicitly set From: when generating an
2358 32. Exim crashed if a remote delivery caused a very long error message to be
2359 recorded - for instance if somebody sent an entire SpamAssassin report back
2360 as a large number of 550 error lines. This bug was coincidentally fixed by
2361 increasing the size of one of Exim's internal buffers (big_buffer) that
2362 happened as part of the Exiscan merge. However, to be on the safe side, I
2363 have made the code more robust (and fixed the comments that describe what
2366 33. Some experimental protocols are using DNS PTR records for new purposes. The
2367 keys for these records are domain names, not reversed IP addresses. The
2368 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2369 leaves it alone. Component reversal etc. now happens only for IP addresses.
2372 34. The host_aton() function is supposed to be passed a string that is known
2373 to be a valid IP address. However, in the case of IPv6 addresses, it was
2374 not checking this. This is a hostage to fortune. Exim now panics and dies
2375 if the condition is not met. A case was found where this could be provoked
2376 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2377 components; fortuitously, this particular loophole had already been fixed
2378 by change 4.50/55 or 4.44/33 above.
2380 If there are any other similar loopholes, the new check in host_aton()
2381 itself should stop them being exploited. The report I received stated that
2382 data on the command line could provoke the exploit when Exim was running as
2383 exim, but did not say which command line option was involved. All I could
2384 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2385 running as the user.
2388 35. There was a buffer overflow vulnerability in the SPA authentication code
2389 (which came originally from the Samba project). I have added a test to the
2390 spa_base64_to_bits() function which I hope fixes it.
2393 36. The daemon start-up calls getloadavg() while still root for those OS that
2394 need the first call to be done as root, but it missed one case: when
2395 deliver_queue_load_max is set with deliver_drop_privilege. This is
2396 necessary for the benefit of the queue runner, because there is no re-exec
2397 when deliver_drop_privilege is set.
2399 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2400 was in use, was not putting the data itself into the right store pool;
2401 consequently, it could be overwritten for a subsequent message in the same
2402 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2405 38. Sometimes the final signoff response after QUIT could fail to get
2406 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2407 < 0 before doing a fflush(). This bug looks as though it goes back to the
2408 introduction of TLS in release 3.20, but "sometimes" must have been rare
2409 because the tests only now provoked it.
2415 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2416 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2417 Now it returns an integer. A number of calls were still expecting a T/F
2418 return. Fortuitously, in all cases, the tests worked in OK situations,
2419 which is the norm. However, things would have gone wrong on any write
2420 failures on the smtp file descriptor. This function is used when sending
2421 messages over SMTP and also when doing verify callouts.
2423 2. When Exim is called to do synchronous delivery of a locally submitted
2424 message (the -odf or -odi options), it no longer closes stderr before doing
2427 3. Implemented the mua_wrapper option.
2429 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2431 5. Implemented the functions header_remove(), header_testname(),
2432 header_add_at_position(), and receive_remove_recipient(), and exported them
2435 6. If an ACL "warn" statement specified the addition of headers, Exim already
2436 inserted X-ACL-Warn: at the start if there was no header name. However, it
2437 was not making this test for the second and subsequent header lines if
2438 there were newlines in the string. This meant that an invalid header could
2439 be inserted if Exim was badly configured.
2441 7. Allow an ACL "warn" statement to add header lines at the start or after all
2442 the Received: headers, as well as at the end.
2444 8. Added the rcpt_4xx retry error code.
2446 9. Added postmaster_mailfrom=xxx to callout verification option.
2448 10. Added mailfrom=xxxx to the callout verification option, for verify=
2451 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2452 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2454 12. Inserted some casts to stop certain compilers warning when using pointer
2455 differences as field lengths or precisions in printf-type calls (mostly
2456 affecting debugging statements).
2458 13. Added optional readline() support for -be (dynamically loaded).
2460 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2461 same clock tick as a message's arrival, so that its received time was the
2462 same as the "first fail" time on the retry record, and that message
2463 remained on the queue past the ultimate address timeout, every queue runner
2464 would try a delivery (because it was past the ultimate address timeout) but
2465 after another failure, the ultimate address timeout, which should have then
2466 bounced the address, did not kick in. This was a "< instead of <=" error;
2467 in most cases the first failure would have been in the next clock tick
2468 after the received time, and all would be well.
2470 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2471 being recognized when the domain list was tested by the match_domain
2472 condition in an expansion string.
2474 16. Added the ${str2b64: operator.
2476 17. Exim was always calling setrlimit() to set a large limit for the number of
2477 processes, without checking whether the existing limit was already
2478 adequate. (It did check for the limit on file descriptors.) Furthermore,
2479 errors from getrlimit() and setrlimit() were being ignored. Now they are
2480 logged to the main and panic logs, but Exim does carry on, to try to do its
2481 job under whatever limits there are.
2483 18. Imported PCRE 5.0.
2485 19. Trivial typo in log message " temporarily refused connection" (the leading
2488 20. If the log selector return_path_on_delivery was set and an address was
2489 redirected to /dev/null, the delivery process crashed because it assumed
2490 that a return path would always be set for a "successful" delivery. In this
2491 case, the whole delivery is bypassed as an optimization, and therefore no
2494 21. Internal re-arrangement: the function for sending a challenge and reading
2495 a response while authentication was assuming a zero-terminated challenge
2496 string. It's now changed to take a pointer and a length, to allow for
2497 binary data in such strings.
2499 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2501 23. Exim was not respecting finduser_retries when seeking the login of the
2502 uid under which it was called; it was always trying 10 times. (The default
2503 setting of finduser_retries is zero.) Also, it was sleeping after the final
2504 failure, which is pointless.
2506 24. Implemented tls_on_connect_ports.
2508 25. Implemented acl_smtp_predata.
2510 26. If the domain in control=submission is set empty, Exim assumes that the
2511 authenticated id is a complete email address when it generates From: or
2512 Sender: header lines.
2514 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2515 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2516 chown and chgrp in /bin and hostname in /usr/bin.
2518 28. Exim was keeping the "process log" file open after each use, just as it
2519 does for the main log. This opens the possibility of it remaining open for
2520 long periods when the USR1 signal hits a daemon. Occasional processlog
2521 errors were reported, that could have been caused by this. Anyway, it seems
2522 much more sensible not to leave this file open at all, so that is what now
2525 29. The long-running daemon process does not normally write to the log once it
2526 has entered its main loop, and it closes the log before doing so. This is
2527 so that log files can straightforwardly be renamed and moved. However,
2528 there are a couple of unusual error situations where the daemon does write
2529 log entries, and I had neglected to close the log afterwards.
2531 30. The text of an SMTP error response that was received during a remote
2532 delivery was being truncated at 512 bytes. This is too short for some of
2533 the long messages that one sometimes sees. I've increased the limit to
2536 31. It is now possible to make retry rules that apply only when a message has a
2537 specific sender, in particular, an empty sender.
2539 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2540 it possible to be selective about when SMTP synchronization is enforced.
2542 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2544 32. Implemented hosts_connection_nolog.
2546 33. Added an ACL for QUIT.
2548 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2551 35. Added mailbox_size and mailbox_filecount to appendfile.
2553 36. Added control = no_multiline_responses to ACLs.
2555 37. There was a bug in the logic of the code that waits for the clock to tick
2556 in the case where the clock went backwards by a substantial amount such
2557 that the microsecond fraction of "now" was more than the microsecond
2558 fraction of "then" (but the whole seconds number was less).
2560 38. Added support for the libradius Radius client library this is found on
2561 FreeBSD (previously only the radiusclient library was supported).
2567 1. When certain lookups returned multiple values in the form name=value, the
2568 quoting of the values was not always being done properly. Specifically:
2569 (a) If the value started with a double quote, but contained no whitespace,
2571 (b) If the value contained whitespace other than a space character (i.e.
2572 tabs or newlines or carriage returns) it was not quoted.
2573 This fix has been applied to the mysql and pgsql lookups by writing a
2574 separate quoting function and calling it from the lookup code. The fix
2575 should probably also be applied to nisplus, ibase and oracle lookups, but
2576 since I cannot test any of those, I have not disturbed their existing code.
2578 2. A hit in the callout cache for a specific address caused a log line with no
2579 reason for rejecting RCPT. Now it says "Previous (cached) callout
2580 verification failure".
2582 3. There was an off-by-one bug in the queryprogram router. An over-long
2583 return line was truncated at 256 instead of 255 characters, thereby
2584 overflowing its buffer with the terminating zero. As well as fixing this, I
2585 have increased the buffer size to 1024 (and made a note to document this).
2587 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2588 when Exim is waiting for an SMTP response from a remote server, Exim
2589 restarts its select() call on the socket, thereby resetting its timeout.
2590 This is not a problem when such interrupts are rare. Somebody set up a cron
2591 job to run exiwhat every 2 minutes, which is less than the normal select()
2592 timeout (5 or 10 minutes). This meant that the select() timeout never
2593 kicked in because it was always reset. I have fixed this by comparing the
2594 time when an interrupt arrives with the time at the start of the first call
2595 to select(). If more time than the timeout has elapsed, the interrupt is
2596 treated as a timeout.
2598 5. Some internal re-factoring in preparation for the addition of Sieve
2599 extensions (by MH). In particular, the "personal" test is moved to a
2600 separate function, and given an option for scanning Cc: and Bcc: (which is
2601 not set for Exim filters).
2603 6. When Exim created an email address using the login of the caller as the
2604 local part (e.g. when creating a From: or Sender: header line), it was not
2605 quoting the local part when it contained special characters such as @.
2607 7. Installed new OpenBSD configuration files.
2609 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2610 try to make them clearer.
2612 9. Callout options, other than the timeout value, were being ignored when
2613 verifying sender addresses in header lines. For example, when using
2615 verify = header_sender/callout=no_cache
2617 the cache was (incorrectly) being used.
2619 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2620 only the Cygwin environment.
2622 11. When return_path_on_delivery was set as a log selector, if different remote
2623 addresses in the same message used different return paths and parallel
2624 remote delivery occurred, the wrong values would sometimes be logged.
2625 (Whenever a remote delivery process finished, the return path value from
2626 the most recently started remote delivery process was logged.)
2628 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2629 lines when AUTH and/or TLS are in use. This is the "received protocol"
2630 field. Exim used to use "asmtp" for authenticated SMTP, without any
2631 indication (in the protocol name) for TLS use. Now it follows the RFC and
2632 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2633 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2634 names appear in log lines as well as in Received: header lines.
2636 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2637 extensions, and comparison tests, and to fix some bugs.
2639 14. Changes to the "personal" filter test:
2641 (1) The test was buggy in that it was just doing the equivalent of
2642 "contains" tests on header lines. For example, if a user's address was
2643 anne@some.where, the "personal" test would incorrectly be true for
2645 To: susanne@some.where
2647 This test is now done by extracting each address from the header in turn,
2648 and checking the entire address. Other tests that are part of "personal"
2649 are now done using regular expressions (for example, to check local parts
2650 of addresses in From: header lines).
2652 (2) The list of non-personal local parts in From: addresses has been
2653 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2654 taken from the Sieve specification recommendations.
2656 (3) If the message contains any header line starting with "List-" it is
2657 treated as non-personal.
2659 (4) The test for "circular" in the Subject: header line has been removed
2660 because it now seems ill-conceived.
2662 15. Minor typos in src/EDITME comments corrected.
2664 16. Installed latest exipick from John Jetmore.
2666 17. If headers_add on a router specified a text string that was too long for
2667 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2668 of string_sprintf() is now avoided.
2670 18. $message_body_size was not set (it was always zero) when running the DATA
2671 ACL and the local_scan() function.
2673 19. For the "mail" command in an Exim filter, no default was being set for
2674 the once_repeat time, causing a random time value to be used if "once" was
2675 specified. (If the value happened to be <= 0, no repeat happened.) The
2676 default is now 0s, meaning "never repeat". The "vacation" command was OK
2677 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2678 (I found it when inspecting the code).
2680 20. There is now an overall timeout for performing a callout verification. It
2681 defaults to 4 times the callout timeout, which applies to individual SMTP
2682 commands during the callout. The overall timeout applies when there is more
2683 than one host that can be tried. The timeout is checked before trying the
2684 next host. This prevents very long delays if there are a large number of
2685 hosts and all are timing out (e.g. when the network connections are timing
2686 out). The value of the overall timeout can be changed by specifying an
2687 additional sub-option for "callout", called "maxwait". For example:
2689 verify = sender/callout=5s,maxwait=20s
2691 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2692 to the end before writing, but this should make it even safer).
2694 22. Exim was forgetting that it had advertised PIPELINING for the second and
2695 subsequent messages on an SMTP connection. It was also not resetting its
2696 memory on STARTTLS and an internal HELO.
2698 23. When Exim logs an SMTP synchronization error within a session, it now
2699 records whether PIPELINING has been advertised or not.
2701 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2702 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2703 rather than long int.
2705 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2707 26. Added the never_mail option to autoreply.
2713 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2714 crash if the getsockname() call failed; this can happen if a connection is
2715 closed very soon after it is established. The problem was simply in the
2716 order in which certain operations were done, causing Exim to try to write
2717 to the SMTP stream before it had set up the file descriptor. The bug has
2718 been fixed by making things happen in the correct order.
2724 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2725 before the connection was closed, thus losing the rejection response.
2727 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2728 some early Solaris releases, but causes trouble in current releases where
2729 socklen_t is defined.
2731 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2734 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2737 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2738 that releasing the top of it at the end releases what was used for sub-
2739 expansions (unless the block got too big). However, discard this block if
2740 the first thing is a variable or header, so that we can use its block when
2741 it is dynamic (useful for very large $message_headers, for example).
2743 6. Lookups now cache *every* query, not just the most recent. A new, separate
2744 store pool is used for this. It can be recovered when all lookup caches are
2745 flushed. Lookups now release memory at the end of their result strings.
2746 This has involved some general refactoring of the lookup sources.
2748 7. Some code has been added to the store_xxx() functions to reduce the amount
2749 of flapping under certain conditions.
2751 8. log_incoming_interface used to affect only the <= reception log lines. Now
2752 it causes the local interface and port to be added to several more SMTP log
2753 lines, for example "SMTP connection from", and rejection lines.
2755 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2757 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2759 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2760 could be overwritten at the end of the current message (or the start of a
2761 new message if it was set in a HELO ACL). The value is now preserved for
2762 the duration of the SMTP connection.
2764 12. If a transport had a headers_rewrite setting, and a matching header line
2765 contained an unqualified address, that address was qualified, even if it
2766 did not match any rewriting rules. The underlying bug was that the values
2767 of the flags that permit the existence of unqualified sender and recipient
2768 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2769 non-local messages, and by -bnq for local messages) were not being
2770 preserved with the message after it was received.
2772 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2773 "next input=" as part of the text comprising the host identity instead of
2774 the correct text. The code was using the same buffer for two different
2775 strings. However, depending on which order the printing function evaluated
2776 its arguments, the bug did not always show up. Under Linux, for example, my
2777 test suite worked just fine.
2779 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2780 doesn't work with some older versions of Perl. It has been changed to "my",
2781 which in any case is probably the better facility to use.
2783 15. A really picky compiler found some instances of statements for creating
2784 error messages that either had too many or two few arguments for the format
2787 16. The size of the buffer for calls to the DNS resolver has been increased
2788 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2789 for addresses that have a lot of PTR records. This alleviates a problem; it
2790 does not fully solve it.
2792 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2793 buffer now truncates the list and logs the incident, which is the same
2794 action as happens when Exim is looking up a host name and its aliases.
2795 Previously in this situation something unpredictable would happen;
2796 sometimes it was "internal error: store_reset failed".
2798 18. If a server dropped the connection unexpectedly when an Exim client was
2799 using GnuTLS and trying to read a response, the client delivery process
2800 crashed while trying to generate an error log message.
2802 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2803 string, for example:
2805 warn message = H1: something\nH2: something
2807 the text was added as a single header line from Exim's point of view
2808 though it ended up OK in the delivered message. However, searching for the
2809 second and subsequent header lines using $h_h2: did not work. This has been
2810 fixed. Similarly, if a system filter added multiple headers in this way,
2811 the routers could not see them.
2813 20. Expanded the error message when iplsearch is called with an invalid key to
2814 suggest using net-iplsearch in a host list.
2816 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2817 ACLs are no longer actually imposed (and a message to that effect is
2820 22. If a "gecos" field in a passwd entry contained escaped characters, in
2821 particular, if it contained a \" sequence, Exim got it wrong when building
2822 a From: or a Sender: header from that name. A second bug also caused
2823 incorrect handling when an unquoted " was present following a character
2824 that needed quoting.
2826 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2827 was not being matched caselessly.
2829 24. Arranged for all hyphens in the exim.8 source to be escaped with
2832 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2833 properly. Recipient callout cache records were still being keyed to include
2834 the sender, even when use_sender was set false. This led to far more
2835 callouts that were necessary. The sender is no longer included in the key
2836 when use_sender is false.
2838 26. Added "control = submission" modifier to ACLs.
2840 27. Added the ${base62d: operator to decode base 62 numbers.
2842 28. dnsdb lookups can now access SRV records.
2844 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2845 the configuration file.
2847 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2848 (-v) mode. This makes the output for a verbose queue run more intelligible.
2850 31. Added a use_postmaster feature to recipient callouts.
2852 32. Added the $body_zerocount variable, containing the number of binary zero
2853 bytes in the message body.
2855 33. The time of last modification of the "new" subdirectory is now used as the
2856 "mailbox time last read" when there is a quota error for a maildir
2859 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2861 35. Added +ignore_unknown as a special item in host lists.
2863 36. Code for decoding IPv6 addresses in host lists is now included, even if
2864 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2865 address was recognized as an IP address, but was then not correctly decoded
2866 into binary, causing unexpected and incorrect effects when compared with
2873 1. Very minor rewording of debugging text in manualroute to say "list of
2874 hosts" instead of "hostlist".
2876 2. If verify=header_syntax was set, and a header line with an unqualified
2877 address (no domain) and a large number of spaces between the end of the
2878 name and the colon was received, the reception process suffered a buffer
2879 overflow, and (when I tested it) crashed. This was caused by some obsolete
2880 code that should have been removed. The fix is to remove it!
2882 3. When running in the test harness, delay a bit after writing a bounce
2883 message to get a bit more predictability in the log output.
2885 4. Added a call to search_tidyup() just before forking a reception process. In
2886 theory, someone could use a lookup in the expansion of smtp_accept_max_
2887 per_host which, without the tidyup, could leave open a database connection.
2889 5. Added the variables $recipient_data and $sender_data which get set from a
2890 lookup success in an ACL "recipients" or "senders" condition, or a router
2891 "senders" option, similar to $domain_data and $local_part_data.
2893 6. Moved the writing of debug_print from before to after the "senders" test
2896 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2897 problems for message scanning, either using a data ACL, or using
2898 local_scan() because the Received: header was not generated till after they
2899 were called (in order to set the time as the time of reception completion).
2900 I have revised the way this works. The header is now generated after the
2901 body is received, but before the ACL or local_scan() are called. After they
2902 are run, the timestamp in the header is updated.
2908 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2909 before starting a queue runner without re-exec. This happened only when
2910 deliver_drop_privilege was set or when the Exim user was set to root. The
2911 effect of the bug was that timeouts during subsequent deliveries caused
2912 crashes instead of being properly handled. The handler is now left at its
2913 default (and expected) setting.
2915 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2916 message, again when deliver_drop_privilege is set or Exim is run as root.
2917 The bug described in (1) was not present in this case, but the tidying up
2918 of the other signals was missing. I have made the two cases consistent.
2920 3. The ignore_target_hosts setting on a manualroute router was being ignored
2921 for hosts that were looked up using the /MX notation.
2923 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2926 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2927 operated on the sender address. After changing the $sender_address to <>
2928 for the sender address verify, Exim was re-instated it as the original
2929 (before rewriting) address, but remembering that it had rewritten it, so it
2930 wasn't rewriting it again. This bug also had the effect of breaking the
2931 sender address verification caching when the sender address was rewritten.
2933 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2934 This has been changed so that if the ip literal address matches
2935 ignore_target_hosts, the router declines.
2937 7. Added expansion conditions match_domain, match_address, and match_local_
2938 part (NOT match_host).
2940 8. The placeholder for the Received: header didn't have a length field set.
2942 9. Added code to Exim itself and to exim_lock to test for a specific race
2943 condition that could lead to file corruption when using MBX delivery. The
2944 issue is with the lockfile that is created in /tmp. If this file is removed
2945 after a process has opened it but before that process has acquired a lock,
2946 there is the potential for a second process to recreate the file and also
2947 acquire a lock. This could lead to two Exim processes writing to the file
2948 at the same time. The added code performs the same test as UW imapd; it
2949 checks after acquiring the lock that its file descriptor still refers to
2950 the same named file.
2952 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2953 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2956 11. Added the smtp_active_hostname option. If used, this will typically be made
2957 to depend on the incoming interface address. Because $interface_address is
2958 not set up until the daemon has forked a reception process, error responses
2959 that can happen earlier (such as "too many connections") no longer contain
2962 12. If an expansion in a condition on a "warn" statement fails because a lookup
2963 defers, the "warn" statement is abandoned, and the next ACL statement is
2964 processed. Previously this caused the whole ACL to be aborted.
2966 13. Added the iplsearch lookup type.
2968 14. Added ident_timeout as a log selector.
2970 15. Added tls_certificate_verified as a log selector.
2972 16. Added a global option tls_require_ciphers (compare the smtp transport
2973 option of the same name). This controls incoming TLS connections.
2975 17. I finally figured out how to make tls_require_ciphers do a similar thing
2976 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2977 before starting the TLS session.
2979 18. Tabs are now shown as \t in -bP output.
2981 19. If the log selector return_path_on_delivery was set, Exim crashed when
2982 bouncing a message because it had too many Received: header lines.
2984 20. If two routers both had headers_remove settings, and the first one included
2985 a superfluous trailing colon, the final name in the first list and the
2986 first name in the second list were incorrectly joined into one item (with a
2987 colon in the middle).
2993 1. Added -C and -D options to the exinext utility, mainly to make it easier
2994 to include in the automated testing, but these could be helpful when
2995 multiple configurations are in use.
2997 2. The exinext utility was not formatting the output nicely when there was
2998 an alternate port involved in the retry record key, nor when there was a
2999 message id as well (for retries that were specific to a specific message
3000 and a specific host). It was also confused by IPv6 addresses, because of
3001 the additional colons they contain. I have fixed the IPv4 problem, and
3002 patched it up to do a reasonable job for IPv6.
3004 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3005 delivery, the log line now contains "pipelined" if PIPELINING was used.
3007 4. An SMTP transport process used to panic and die if the bind() call to set
3008 an explicit outgoing interface failed. This has been changed; it is now
3009 treated in the same way as a connect() failure.
3011 5. A reference to $sender_host_name in the part of a conditional expansion
3012 that was being skipped was still causing a DNS lookup. This no longer
3015 6. The def: expansion condition was not recognizing references to header lines
3016 that used bh_ and bheader_.
3018 7. Added the _cache feature to named lists.
3020 8. The code for checking quota_filecount in the appendfile transport was
3021 allowing one more file than it should have been.
3023 9. For compatibility with Sendmail, the command line option
3031 and sets the incoming protocol and host name (for trusted callers). The
3032 host name and its colon can be omitted when only the protocol is to be set.
3033 Note the Exim already has two private options, -pd and -ps, that refer to
3034 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3035 "s", but I don't think that's a major issue.
3037 10. A number of refactoring changes to the code, none of which should affect
3040 (a) The number of logging options was getting close to filling up the
3041 32-bit word that was used as a bit map. I have split them into two classes:
3042 those that are passed in the argument to log_write(), and those that are
3043 only ever tested independently outside of that function. These are now in
3044 separate 32-bit words, so there is plenty of room for expansion again.
3045 There is no change in the user interface or the logging behaviour.
3047 (b) When building, for example, log lines, the code previously used a
3048 macro that called string_cat() twice, in order to add two strings. This is
3049 not really sufficiently general. Furthermore, there was one instance where
3050 it was actually wrong because one of the argument was used twice, and in
3051 one call a function was used. (As it happened, calling the function twice
3052 did not affect the overall behaviour.) The macro has been replaced by a
3053 function that can join an arbitrary number of extra strings onto a growing
3056 (c) The code for expansion conditions now uses a table and a binary chop
3057 instead of a serial search (which was left over from when there were very
3058 few conditions). Also, it now recognizes conditions like "pam" even when
3059 the relevant support is not compiled in: a suitably worded error message is
3060 given if an attempt is made to use such a condition.
3062 11. Added ${time_interval:xxxxx}.
3064 12. A bug was causing one of the ddress fields not to be passed back correctly
3065 from remote delivery subprocesses. The field in question was not being
3066 subsequently used, so this caused to problems in practice.
3068 13. Added new log selectors queue_time and deliver_time.
3070 14. Might have fixed a bug in maildirsizefile handling that threw up
3071 "unexpected character" debug warnings, and recalculated the data
3072 unnecessarily. In any case, I expanded the warning message to give more
3075 15. Added the message "Restricted characters in address" to the statements in
3076 the default ACL that block characters like @ and % in local parts.
3078 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3079 Three changes have been made:
3081 (a) There was a serious bug; a negative response to MAIL caused the whole
3082 recipient domain to be cached as invalid, thereby blocking all messages
3083 to all local parts at the same domain, from all senders. This bug has
3084 been fixed. The domain is no longer cached after a negative response to
3085 MAIL if the sender used is not empty.
3087 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3090 (c) A new callout option, "use_sender" has been added for people who want
3091 the modified behaviour.
3097 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3100 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3101 indeed breaks things for older releases.
3103 3. Added additional logging to the case where there is a problem reading data
3104 from a filter that is running in a subprocess using a pipe, in order to
3105 try to track down a specific problem.
3107 4. Testing facility fudge: when running in the test harness and attempting
3108 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3109 getting "No route to host". Convert this to a timeout.
3111 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3114 6. Some OS don't have socklen_t but use size_t instead. This affects the
3115 fifth argument of getsockopt() amongst other things. This is now
3116 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3117 can be set for individual OS. I have set it for SunOS5, OSF1, and
3118 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3119 some earlier ones do not.
3121 7. Change 4.30/15 was not doing the test caselessly.
3123 8. The standard form for an IPv6 address literal was being rejected by address
3124 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3125 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3126 this, as well as the form without the "IPv6" on the front (but only when
3127 address literals are enabled, of course).
3129 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3131 10. Exim crashed if a message with an empty sender address specified by -f
3132 encountered a router with an errors_to setting. This could be provoked only
3133 by a command such as
3137 where an empty string was supplied; "<>" did not hit this bug.
3139 11. Installed PCRE release 4.5.
3141 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3142 remained set. It is now erased.
3144 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3145 times from message ids (which are base 36 rather than the normal 62).
3147 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3148 were being counted as actual protocol errors, and logged if the log
3149 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3150 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3151 and DATA following a set of rejected RCPTs do not count as protocol errors.
3152 In other words, Exim assumes they were pipelined, though this may not
3153 actually be the case. Of course, in all cases the client gets an
3154 appropriate error code.
3156 15. If a lookup fails in an ACL condition, a message about the failure may
3157 be available; it is used if testing the ACL cannot continue, because most
3158 such messages specify what the cause of the deferral is. However, some
3159 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3160 that caused an old message to be retained and used if a later statement
3161 caused a defer, replacing the real cause of the deferral.
3163 16. If an IP address had so many PTR records that the DNS lookup buffer
3164 was not large enough to hold them, Exim could crash while trying to process
3165 the truncated data. It now detects and logs this case.
3167 17. Further to 4.21/58, another change has been made: if (and only if) the
3168 first line of a message (the first header line) ends with CRLF, a bare LF
3169 in a subsequent header line has a space inserted after it, so as not to
3170 terminate the header.
3172 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3173 unnecessarily, used atoi() instead of strtol(), and didn't check the
3174 termination when getting file sizes from file names by regex.
3176 19. Completely re-implemented the support for maildirsize files, in the light
3177 of a number of problems with the previous contributed implementation
3178 (4.30/29). In particular:
3180 . If the quota is zero, the maildirsize file is maintained, but no quota is
3183 . If the maildir directory does not exist, it is created before any attempt
3184 to write a maildirsize file.
3186 . The quota value in the file is just a cache; if the quota is changed in
3187 the transport, the new value overrides.
3189 . A regular expression is available for excluding directories from the
3192 20. The autoreply transport checks the characters in options that define the
3193 message's headers; it allows continued headers, but it was checking with
3194 isspace() after an embedded newline instead of explicitly looking for a
3197 21. If all the "regular" hosts to which an address was routed had passed their
3198 expiry times, and had not reached their retry times, the address was
3199 bounced, even if fallback hosts were defined. Now Exim should go on to try
3202 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3203 equivalent code in the SMTP transport. Some hosts send humungous responses
3204 to HELO/EHLO, more than 1024 it seems.
3206 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3207 gives compiler warnings in some environments. I've now done it "properly",
3210 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3211 (because of problems with the built-in one) was declared to return uschar *
3212 instead of char *, causing compiler failure.
3214 25. Fixed a file descriptor leak when processing alias/forward files.
3216 26. Fixed a minor format string issue in dbfn.c.
3218 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3220 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3221 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3224 29. When a sender address is verified, it is cached, to save repeating the test
3225 when there is more than one recipient in a message. However, when the
3226 verification involves a callout, it is possible for different callout
3227 options to be set for different recipients. It is too complicated to keep
3228 track of this in the cache, so now Exim always runs a verification when a
3229 callout is required, relying on the callout cache for the optimization.
3230 The overhead is duplication of the address routing, but this should not be
3233 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3234 to be verified with callout=postmaster, and the main callout worked but the
3235 postmaster check failed, the verification correctly failed. However, if a
3236 subsequent RCPT command asked for sender verification *without* the
3237 postmaster check, incorrect caching caused this verification also to fail,
3240 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3241 it was not caching the DNS options (qualify_single, search_parents) that
3242 were used when the lookup failed. A subsequent lookup with different
3243 options therefore always gave the same answer, though there were cases
3244 where it should not have. (Example: a "domains = !$mx_any" option on a
3245 dnslookup router: the "domains" option is always processed without any
3246 widening, but the router might have qualify_single set.) Now Exim uses the
3247 cached value only when the same options are set.
3249 32. Added John Jetmore's "exipick" utility to the distribution.
3251 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3252 than a timeout (e.g. a certificate is required, and is not provided), an
3253 Exim server now closes the connection immediately. Previously it waited for
3254 the client to close - but if the client is SSL, it seems that they each
3255 wait for each other, leading to a delay before one of them times out.
3257 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3258 maintained 0.8.x compatibility because I don't think many are using it, and
3259 it is clearly obsolete.
3261 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3264 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3265 client certificate was expired. A simple patch fixes this, though I don't
3266 understand the full logic of why the verify callback is called multiple
3269 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3270 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3271 which causes problems with some clients (such as the Certicom SSL Plus
3272 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3273 disables the coutermeasure allowing Eudora to connect."
3275 38. Exim was not checking that a write() to a log file succeeded. This could
3276 lead to Bad Things if a log got too big, in particular if it hit a file
3277 size limit. Exim now panics and dies if it cannot write to a log file, just
3278 as it does if it cannot open a log file.
3280 39. Modified OS/Makefile-Linux so that it now contains
3282 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3284 The two -D definitions ensure that Exim is compiled with large file
3285 support, which makes it possible to handle log files that are bigger than
3288 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3289 instance) a domain was checked against a named list that involved a lookup,
3290 causing $domain_data to be set, then another domain was checked against the
3291 same list, then the first domain was re-checked, the value of $domain_data
3292 after the final check could be wrong. In particular, if the second check
3293 failed, it could be set empty. This bug probably also applied to
3296 41. The strip_trailing_dot option was not being applied to the address given
3297 with the -f command-line option.
3299 42. The code for reading a message's header from the spool was incrementing
3300 $received_count, but never initializing it. This meant that the value was
3301 incorrect (doubled) while delivering a message in the same process in which
3302 it was received. In the most common configuration of Exim, this never
3303 happens - a fresh exec is done - but it can happen when
3304 deliver_drop_privilege is set.
3306 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3307 it now includes up to 150 characters of the unexpected data in the log
3310 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3311 and building data strings. The size of both of these buffers was 10 000
3312 bytes - far larger than anybody would *ever* want, thought I. Needless to
3313 say, somebody hit the limit. I have increased the maximum line length to
3314 20 000 and the maximum data length of concatenated lines to 100 000. I have
3315 also fixed two bugs, because there was no checking on these buffers. Tsk,
3316 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3317 buffer is too small.
3319 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3320 lsearch lookups. Now it does.
3322 46. When parsing a route_list item in a manualroute router, a fixed-length
3323 buffer was used for the list of hosts. I made this 1024 bytes long,
3324 thinking that nobody would ever have a list of hosts that long. Wrong.
3325 Somebody had a whole pile of complicated expansion conditions, and the
3326 string was silently truncated, leading to an expansion error. It turns out
3327 that it is easier to change to an unlimited length (owing to other changes
3328 that have happened since this code was originally written) than to build
3329 structure for giving a limitation error. The length of the item that
3330 expands into the list of hosts is now unlimited.
3332 47. The lsearch lookup could not handle data where the length of text line was
3333 more than 4095 characters. Such lines were truncated, leading to shortened
3334 data being returned. It should now handle lines of any length.
3336 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3337 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3340 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3341 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3342 no longer happens in comment lines. A list of replacements is now placed
3343 at the head of all of the source files, except those whose only change is
3344 to replace PERL_COMMAND in the very first #! line.
3346 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3347 messages on the queue, with a bottom-up merge sort, using code contributed
3348 by Michael Haardt. This should make operations like -bp somewhat faster on
3349 large queues. It won't affect queue runners, except when queue_run_in_order
3352 51. Installed eximstats 1.31 in the distribution.
3354 52. Added support for SRV lookups to the dnslookup router.
3356 53. If an ACL referred to $message_body or $message_body_end, the value was not
3357 reset for any messages that followed in the same SMTP session.
3359 54. The store-handling optimization for building very long strings was not
3360 differentiating between the different store pools. I don't think this
3361 actually made any difference in practice, but I've tidied it.
3363 55. While running the routers to verify a sender address, $sender_address
3364 was still set to the sender address. This is wrong, because when routing to
3365 send a bounce to the sender, it would be empty. Therefore, I have changed
3366 it so that, while verifying a sender address, $sender_address is set to <>.
3367 (There is no change to what happens when verifying a recipient address.)
3369 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3370 target A or AAAA records (if not already returned) without resetting the
3371 qualify_single or search_parents options of the DNS resolver. These are
3372 inappropriate in this case because the targets of MX and SRV records must
3373 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3374 target that, when qualified, matched something in the local domain. These
3375 two options are now turned off when doing these lookups.
3377 57. It seems that at least some releases of Reiserfs (which does not have the
3378 concept of a fixed number of inodes) returns zero and not -1 for the
3379 number of available inodes. This interacted badly with check_spool_inodes,
3380 which assumed that -1 was the "no such thing" setting. What I have done is
3381 to check that the total number of inodes is greater than zero before doing
3382 the test of how many are available.
3384 58. When a "warn" ACL statement has a log_message modifier, the message is
3385 remembered, and not repeated. This is to avoid a lot of repetition when a
3386 message has many recipients that cause the same warning to be written.
3387 Howewer, Exim was preserving the list of already written lines for an
3388 entire SMTP session, which doesn't seem right. The memory is now reset if a
3389 new message is started.
3391 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3392 debugging output unless log_rewrite was also set.
3394 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3395 of (int)(handle) when we know that handle contains (void *)(-1).
3397 61. The Exim daemon panic-logs an error return when it closes the incoming
3398 connection. However "connection reset by peer" seems to be common, and
3399 isn't really an error worthy of noting specially, so that particular error
3402 62. When Exim is trying to find all the local interfaces, it used to panic and
3403 die if the ioctl to get the interface flags failed. However, it seems that
3404 on at least one OS (Solaris 9) it is possible to have an interface that is
3405 included in the list of interfaces, but for which you get a failure error
3406 for this call. This happens when the interface is not "plumbed" into a
3407 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3408 failure of the "get flags" call assumes that the interface is down.
3410 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3411 makes life easier for people who are doing arithmetic on fields extracted
3412 from dates, where you often get leading zeros that should not be
3413 interpreted as octal.
3415 64. Added qualify_domain to the redirect router, to override the global
3418 65. If a pathologically long header line contained very many addresses (the
3419 report of this problem mentioned 10 000) and each of them was rewritten,
3420 Exim could use up a very large amount of memory. (It kept on making new
3421 copies of the header line as it rewrote, and never released the old ones.)
3422 At the expense of a bit more processing, the header rewriting function has
3423 been changed so that it no longer eats memory in this way.
3425 66. The generation of the Received: header has been moved from the time that a
3426 message starts to be received, to the time that it finishes. The timestamp
3427 in the Received: header should now be very close to that of the <= log
3428 line. There are two side-effects of this change:
3430 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3431 logged header lines no longer include the local Received: line, because
3432 it has not yet been created. The same applies to a copy of the message
3433 that is returned to a non-SMTP sender when a message is rejected.
3435 (b) When a filter file is tested using -bf, no additional Received: header
3436 is added to the test message. After some thought, I decided that this
3439 This change does not affect the value of $received_for. It is still set
3440 after address rewriting, but before local_scan() is called.
3442 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3444 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3445 gave an unhelpful panic error message, and a defer error. I have managed to
3446 change this behaviour so that it now rejects any supplied certificate,
3447 which seems right, as the list of acceptable certificates is empty.
3449 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3450 gave an unhelpful defer error. I have not managed to make this reject any
3451 supplied certificates, but the error message it gives is "no certificate
3452 supplied", which is not helpful.
3454 70. exigrep's output now also includes lines that are not associated with any
3455 message, but which match the given pattern. Implemented by a patch from
3456 Martin Sluka, which also tidied up the Perl a bit.
3458 71. Recipient callout verification, like sender verification, was using <> in
3459 the MAIL FROM command. This isn't really the right thing, since the actual
3460 sender may affect whether the remote host accepts the recipient or not. I
3461 have changed it to use the actual sender in the callout; this means that
3462 the cache record is now keyed on a recipient/sender pair, not just the
3463 recipient address. There doesn't seem to be a real danger of callout loops,
3464 since a callout by the remote host to check the sender would use <>.
3465 [SEE ABOVE: changed after hitting problems.]
3467 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3468 temporary errors. However, in the case of such a code being given after
3469 the end of a data transmission (i.e. after ".") Exim was failing to write
3470 a retry record for the message. (Yes, there was some broken host that was
3471 actually sending 8xx at this point.)
3473 73. An unknown lookup type in a host list could cause Exim to panic-die when
3474 the list was checked. (An example that provoked this was putting <; in the
3475 middle of a list instead of at the start.) If this happened during a DATA
3476 ACL check, a -D file could be left lying around. This kind of configuration
3477 error no longer causes Exim to die; instead it causes a defer errror. The
3478 incident is still logged to the main and panic logs.
3480 74. Buglet left over from Exim 3 conversion. The message "too many messages
3481 in one connection" was written to the rejectlog but not the mainlog, except
3482 when address rewriting (yes!) was being logged.
3484 75. Added write_rejectlog option.
3486 76. When a system filter was run not as root (that is, when system_filter_user
3487 was set), the values of the $n variables were not being returned to the
3488 main process; thus, they were not subsequently available in the $sn
3491 77. Added +return_path_on_delivery log selector.
3493 78. A connection timeout was being treated differently from recipients deferred
3494 when testing hosts_max_try with a message that was older than the host's
3495 retry timeout. (The host should not be counted, thus allowing all hosts to
3496 be tried at least once before bouncing.) This may have been the cause of an
3497 occasionally reported bug whereby a message would remain on the queue
3498 longer than the retry timeout, but would be bounced if a delivery was
3499 forced. I say "may" because I never totally pinned down the problem;
3500 setting up timeout/retry tests is difficult. See also the next item.
3502 79. The ultimate address timeout was not being applied to errors that involved
3503 a combination of host plus message (for example, a timeout on a MAIL
3504 command). When an address resolved to a number of possible hosts, and they
3505 were not all tried for each delivery (e.g. because of hosts_max_try), a
3506 message could remain on the queue longer than the retry timeout.
3508 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3511 81. Fixed an obscure SMTP outgoing bug which required at least the following
3512 conditions: (a) there was another message waiting for the same server;
3513 (b) the server returned 5xx to all RCPT commands in the first message so
3514 that the message was not completed; (c) the server dropped the connection
3515 or gave a negative response to the RSET that Exim sends to abort the
3516 transaction. The observed case was a dropped connection after DATA that had
3517 been sent in pipelining mode. That is, the server had advertised PIPELINING
3518 but was not implementing it correctly. The effect of the bug was incorrect
3519 behaviour, such as trying another host, and this could lead to a crash.
3525 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3526 and daemon.c were passed as pointers to ints; they should have been
3527 pointers to socklen_t variables (which are typically unsigned ints).
3529 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3532 3. Fixed a really odd bug that affected only the testing scheme; patching a
3533 certain fixed string in the binary changed the value of another string that
3534 happened to be identical to the end of the original first string.
3536 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3537 name", it returns that address as the IP address. On some operating
3538 systems (e.g. Solaris), it also passes back the IP address string as the
3539 "host name". However, on others (e.g. Linux), it passes back an empty
3540 string. Exim wasn't checking for this, and was changing the host name to an
3541 empty string, assuming it had been canonicized.
3543 5. Although rare, it is permitted to have more than one PTR record for a given
3544 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3545 all the names associated with an address, because they do in Solaris.
3546 However, it seems that they do not in Linux for data that comes from the
3547 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3548 I found this out when I moved to a new Linux workstation and tried to run
3549 the Exim test suite.
3551 To get round this problem I have changed the code so that it now does its
3552 own call to the DNS to look up PTR records when searching for a host name.
3553 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3554 addresses that are only in /etc/hosts are still found.
3556 This behaviour is, however, controlled by an option called host_lookup_
3557 order, which defaults to "bydns:byaddr". If people want to use the other
3558 order, or indeed, just use one or the other means of lookup, they can
3559 specify it in this variable.
3561 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3562 some operating systems, this comes back from gethostbyaddr() as an empty
3563 string, and this is what Exim used to test for. However, it seems that in
3564 other systems, "." is yielded. Exim now tests for this case too.
3566 7. The values of check_spool_space and check_log_space are now held internally
3567 as a number of kilobytes instead of an absolute number of bytes. If a
3568 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3569 kilobyte. This means that much larger values can be stored.
3571 8. Exim monitor: an attempt to get the action menu when not actually pointing
3572 at a message produces an empty menu entitled "No message selected". This
3573 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3574 no entries in it ("Shell widget menu has zero width and/or height"). So I
3575 have added a single, blank menu entry in this case.
3577 9. Added ${quote_local_part.
3579 10. MIME decoding is now applied to the contents of Subject: header lines when
3582 11. Now that a reference to $sender_host_address automatically causes a reverse
3583 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3584 host lookup before query-style lookups in lists that might use this
3585 variable. This has therefore been abolished, and the "net-" prefix is no
3586 longer necessary for query-style lookups.
3588 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3589 have been a typo for LFLAGS, so it has been changed.
3591 13. The install script calls Exim with "-C /dev/null" in order to find the
3592 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3593 to be output. Howeve, since Exim outputs its version number before the
3594 error, it didn't break the script. It just looked ugly. I fixed this by
3595 always allowing "-C /dev/null" if the caller is root.
3597 14. Ignore overlarge ACL variable number when reading spool file - insurance
3598 against a later release with more variables having written the file.
3600 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3601 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3602 this, as well as the form without the "IPv6" on the front.
3604 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3605 OS/Makefile-Darwin file.
3607 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3608 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3610 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3611 variable. However, some OS use ints for inodes. I've added cast to long int
3612 to get rid of the compiler warning.
3614 19. I had forgotten to lock out "/../" in configuration file names when
3615 ALT_CONFIG_PREFIX was set.
3617 20. Routers used for verification do not need to specify transports. However,
3618 if such a router generated a host list, and callout was configured, Exim
3619 crashed, because it could not find a port number from the (non-existent)
3620 transport. It now assumes port 25 in this circumstance.
3622 21. Added the -t option to exigrep.
3624 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3625 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3626 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3627 them is set, LOOKUP_LSEARCH is forced.
3629 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3631 24. Added sender and host information to the "rejected by local_scan()" log
3632 line; previously there was no indication of these.
3634 25. Added .include_if_exists.
3636 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3637 Linux. It turns out that not all file systems support this. Apparently some
3638 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3639 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3640 not supported on the file descriptor, is now ignored when Exim is trying to
3641 sync a directory. This applies only to Linux.
3643 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3645 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3646 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3649 29. Added support for maildirsize files from supplied patch (modified a bit).
3651 30. The use of :fail: followed by an empty string could lead Exim to respond to
3652 sender verification failures with (e.g.):
3654 550 Verification failed for <xxx>
3655 550 Sender verify failed
3657 where the first response line was missing the '-' that indicates it is not
3658 the final line of the response.
3660 31. The loop for finding the name of the user that called Exim had a hardwired
3661 limit of 10; it now uses the value of finduser_retries, which is used for
3662 all other user lookups.
3664 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3667 33. Exim was neglecting to zero errno before one call of strtol() when
3668 expanding a string and expecting an integer value. On some systems this
3669 resulted in spurious "integer overflow" errors. Also, it was casting the
3670 result into an int without checking.
3672 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3673 did not work. The code looks as if it has *never* worked, though it appears
3674 to have been documented since at least releast 1.62. I have made it work.
3676 35. The "timeout_DNS" error in retry rules, also documented since at least
3677 1.62, also never worked. As it isn't clear exactly what this means, and
3678 clearly it isn't a major issue, I have abolished the feature by treating it
3679 as "timeout", and writing a warning to the main and panic logs.
3681 36. The display of retry rules for -brt wasn't always showing the error code
3684 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3685 timeout_connect_A, timeout_connect_MX.
3687 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3688 to the empty sender.
3690 39. The daemon was not analysing the content of -oX till after it had closed
3691 stderr and disconnected from the controlling terminal. This meant that any
3692 syntax errors were only noted on the panic log, and the return code from
3693 the command was 0. By re-arranging the code a little, I've made the
3694 decoding happen first, so such errors now appear on stderr, and the return
3695 code is 1. However, the actual setting up of the sockets still happens in
3696 the disconnected process, so errors there are still only recorded on the
3699 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3700 connections (as happens on some IP stacks) was logged at start up time as
3701 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3702 it from "IPv6 and IPv4", which means that two separate sockets are being
3705 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3706 says whether AF_INET or AF_INET6 was passed as an argument.
3708 42. Exiwhat output was messed up when time zones were included in log
3711 43. Exiwhat now gives more information about the daemon's listening ports,
3712 and whether -tls-on-connect was used.
3714 44. The "port" option of the smtp transport is now expanded.
3716 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3717 silently ignored. Now an error message is written to the main and panic
3720 46. There's a new ACL modifier called "logwrite" which writes to a log file
3721 as soon as it is encountered.
3723 47. Added $local_user_uid and $local_user_gid at routing time.
3725 48. Exim crashed when trying to verify a sender address that was being
3728 49. Exim was recognizing only a space character after ".include". It now also
3729 recognizes a tab character.
3731 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3732 extracting the relevant information from the specification. The man page no
3733 longer contains scrambled data for the -d option, and I've added a section
3734 at the front about calling Exim under different names.
3736 51. Added "extra_headers" argument to the "mail" command in filter files.
3738 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3741 53. Installed eximstats 1.29.
3743 54. Added transport_filter_timeout as a generic transport option.
3745 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3746 Cc: header lines. This was required by RFC 822, but it not required by RFC
3749 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3750 incoming messages that did not have them. Now it does so only if the
3751 message originates locally, that is, if there is no associated remote host
3752 address. When Resent- header lines are present, this applies to the Resent-
3753 lines rather than the non-Resent- lines.
3755 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3756 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3758 58. Messages for configuration errors now include the name of the main
3759 configuration file - useful now that there may be more than one file in a
3760 list (.included file names were always shown).
3762 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3763 for those rare installations that do not start the daemon as root or run it
3764 setuid root. I've cut out the call to initgroups() if the daemon is not
3767 60. The Exim user and group can now be bound into the binary as text strings
3768 that are looked up at the start of Exim's processing.
3770 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3772 62. Added $mailstore_basename variable.
3774 63. Installed patch to sieve.c from Michael Haardt.
3776 64. When Exim failed to open the panic log after failing to open the main log,
3777 the original message it was trying to log was written to stderr and debug
3778 output, but if they were not available (the usual case in production), it
3779 was lost. Now it is written to syslog before the two lines that record the
3780 failures to open the logs.
3782 65. Users' Exim filters run in subprocesses under the user's uid. It is
3783 possible for a "deliver" command or an alias in a "personal" command to
3784 provoke an address rewrite. If logging of address rewriting is configured,
3785 this fails because the process is not running as root or exim. There may be
3786 a better way of dealing with this, but for the moment (because 4.30 needs
3787 to be released), I have disabled address rewrite logging when running a
3788 filter in a non-root, non-exim process.
3794 1. The buildconfig auxiliary program wasn't quoting the value set for
3795 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3796 not defined. This bug was masked in 4.22 by the effect that was fixed in
3799 2. Some messages that were rejected after a message id was allocated were
3800 shown as "incomplete" by exigrep. It no longer does this for messages that
3801 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3803 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3804 have allow_domain_literals set, the ID did not get logged in the <= line.
3805 Domain literals are now always recognized in Message-ID: header lines.
3807 4. The first argument for a ${extract expansion item is the key name or field
3808 number. Leading and trailing spaces in this item were not being ignored,
3809 causing some misleading effects.
3811 5. When deliver_drop_privilege was set, single queue runner processes started
3812 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3813 same command in the process it spins off) were not dropping privilege.
3815 6. When the daemon running as "exim" started a queue runner, it always
3816 re-executed Exim in the spun-off process. This is a waste of effort when
3817 deliver_drop_privilege is set. The new process now just calls the
3818 queue-runner function directly.
3824 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3827 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3828 ignored. Though the use of -oP was forcing the writing of a pid file, it
3829 was always written to the default place.
3831 3. If the message "no IP address found for host xxxx" is generated during
3832 incoming verification, it is now followed by identification of the incoming
3833 connection (so you can more easily find what provoked it).
3835 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3837 5. Added some features to "harden" Exim a bit more against certain attacks:
3839 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3840 be put in Local/Makefile. This is like the never_users runtime option,
3841 but it cannot be overridden. The default setting is "root".
3843 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3844 prefix string with which any file named in a -C command line option
3847 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3848 is retained for -C and -D only if the caller of Exim is root. Without
3849 it, the exim user may also use -C and -D and retain privilege.
3851 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3852 command line option is disabled.
3854 6. Macro names set by the -D option must start with an upper case letter, just
3855 like macro names defined in the configuration file.
3857 7. Added "dereference=" facility to LDAP.
3859 8. Two instances of the typo "uknown" in the source files are fixed.
3861 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3862 the Configure-Makefile script screwed up while processing it.
3864 10. Incorporated PCRE 4.4.
3866 11. The SMTP synchronization check was not operating right at the start of an
3867 SMTP session. For example, it could not catch a HELO sent before the client
3868 waited for the greeting. There is now a check for outstanding input at the
3869 point when the greeting is written. Because of the duplex, asynchronous
3870 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3871 way, but not yet received, when the check is performed.
3873 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3874 on TCP/IP sockets, because this apparently causes some broken clients to
3877 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3878 unchanged) from the Cygwin maintainer.
3880 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3881 was supported instead of testing for mbx. Effectively a typo.
3883 15. The spa authenticator server code was not checking that the input it
3884 received was valid base64.
3886 16. The debug output line for the "set" modifier in ACLs was not showing the
3887 name of the variable that was being set.
3889 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3891 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3892 lookup on its own. Something else was needed to trigger the lookup. For
3893 example, a match in host_lookup or the need for a host name in a host list.
3894 Now, if $sender_host_name is referenced and the host name has not yet been
3895 looked up, a lookup is performed. If the lookup fails, the variable remains
3896 empty, and $host_lookup_failed is set to "1".
3898 19. Added "eqi" as a case-independent comparison operator.
3900 20. The saslauthd authentication condition could segfault if neither service
3901 nor realm was specified.
3903 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3904 error message that was logged was misleading, and incoming SMTP
3905 connections were dropped. The message is now more accurate, and temporary
3906 errors are given to SMTP connections.
3908 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3909 (except RSET) with a 421 error, until QUIT is received. However, it was
3910 failing to send a response to QUIT.
3912 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3913 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3914 ACL is now run after the helo_try_verify_hosts code.
3916 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3917 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3918 case-independent, so other case variants are also recognized). Apparently
3919 some systems use these upper case variants.
3921 25. If more than two messages were waiting for the same host, and a transport
3922 filter was specified for the transport, Exim sent two messages over the
3923 same TCP/IP connection, and then failed with "socket operation on non-
3924 socket" when it tried to send the third.
3926 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3928 27. The extern definition of crypt16() in expand.c was not being excluded when
3929 the OS had its own crypt16() function.
3931 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3932 as a preferred synonym for return_size_limit, both as an option and as an
3935 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3937 30. Changed the default configuration ACL to relax the local part checking rule
3938 for addresses that are not in any local domains. For these addresses,
3939 slashes and pipe symbols are allowed within local parts, but the sequence
3940 /../ is explicitly forbidden.
3942 31. SPA server authentication was not clearing the challenge buffer before
3945 32. log_message in a "warn" ACL statement was writing to the reject log as
3946 well as to the main log, which contradicts the documentation and doesn't
3947 seem right (because no rejection is happening). So I have stopped it.
3949 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3950 However, I am unable to do any testing of this.
3952 34. Fixed an infelicity in the appendfile transport. When checking directories
3953 for a mailbox, to see if any needed to be created, it was accidentally
3954 using path names with one or more superfluous leading slashes; tracing
3955 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3957 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3958 contents are added to the log line that is written for every discarded
3959 recipient. (Previously a log_message setting was ignored.)
3961 36. The ${quote: operator now quotes the string if it is empty.
3963 37. The install script runs exim in order to find its version number. If for
3964 some reason other than non-existence or emptiness, which it checks, it
3965 could not run './exim', it was installing it with an empty version number,
3966 i.e. as "exim-". This error state is now caught, and the installation is
3969 38. An argument was missing from the function that creates an error message
3970 when Exim fails to connect to the socket for saslauthd authentication.
3971 This could cause Exim to crash, or give a corrupted message.
3973 39. Added isip, isip4, and isip6 to ${if conditions.
3975 40. The ACL variables $acl_xx are now saved with the message, and can be
3976 accessed later in routers, transports, and filters.
3978 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3979 strings in the file are not string-expanded.
3981 42. If a MAIL command specified a SIZE value that was too large to fit into an
3982 int variable, the check against message_size_limit failed. Such values are
3983 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3984 day this will have to be increased, but I don't think I want to be around
3985 when emails are that large.
3992 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3993 iconv() is not standard in FreeBSD.
3995 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3996 IPv6 enabled. The observed symptom was a segmentation fault on return from
3997 the function os_common_find_running_interfaces() in src/os.c.
3999 3. In the check_special_case() function in daemon.c I had used "errno" as an
4000 argument name, which causes warnings on some systems. This was basically a
4001 typo, since it was named "eno" in the comments!
4003 4. The code that waits for the clock to tick (at a resolution of some fraction
4004 of a second) so as to ensure message-id uniqueness was always waiting for
4005 at least one whole tick, when it could have waited for less. [This is
4006 almost certainly not relevant at current processor speeds, where it is
4007 unlikely to ever wait at all. But we try to future-proof.]
4009 5. The function that sleeps for a time interval that includes fractions of a
4010 second contained a race. It did not block SIGALRM between setting the
4011 timer, and suspending (a couple of lines later). If the interval was short
4012 and the sigsuspend() was delayed until after it had expired, the suspension
4013 never ended. On busy systems this could lead to processes getting stuck for
4016 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4017 process, before it forks any delivery processes. The open lookup caching
4018 mechanism meant that the open file or database connection was passed into
4019 the delivery process. The problem was that delivery processes always tidy
4020 up cached lookup data. This could cause a problem for the next delivery
4021 process started by the queue runner, because the external queue runner
4022 process does not know about the closure. So the next delivery process
4023 still has data in the lookup cache. In the case of a file lookup, there was
4024 no problem because closing a file descriptor in a subprocess doesn't affect
4025 the parent. However, if the lookup was caching a connection to a database,
4026 the connection was closed, and the second delivery process was likely to
4027 see errors such as "PGSQL: query failed: server closed the connection
4028 unexpectedly". The problem has been fixed by closing all cached lookups
4029 in a queue runner before running a delivery process.
4031 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4032 seem to have the "const" qualifier which it has on other OS. I've
4035 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4036 *of the same type* (client or server) with the same public name that an
4037 error should be diagnosed.
4039 9. When Exim looked up a host name for an IP address, but failed to find the
4040 original IP address when looking up the host name (a safety check), it
4041 output the message "<ip address> does not match any IP for NULL", which was
4042 confusing, to say the least. The bug was that the host name should have
4043 appeared instead of "NULL".
4045 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4046 user that is built into the binary, and the -C or -D options is used, root
4047 privilege is dropped before the configuration file is read. In addition,
4048 logging is switched to stderr instead of the normal log files. If the
4049 configuration then re-defines the Exim user, the unprivileged environment
4050 is probably not what is expected, so Exim logs a panic warning message (but
4053 However, if deliver_drop_privilege is set, the unprivileged state may well
4054 be exactly what is intended, so the warning has been cut out in that case,
4055 and Exim is allowed to try to write to its normal log files.
4061 1. smtp_return_error_details was not giving details for temporary sender
4062 or receiver verification errors.
4064 2. Diagnose a configuration error if two authenticators have the same public
4067 3. Exim used not to create the message log file for a message until the first
4068 delivery attempt. This could be confusing when incoming messages were held
4069 for policy or load reasons. The message log file is now created at the time
4070 the message is received, and an initial "Received" line is written to it.
4072 4. The automatically generated man page for command line options had a minor
4073 bug that caused no ill effects; however, a more serious problem was that
4074 the procedure for building the man page automatically didn't always
4075 operate. Consequently, release 4.20 contains an out-of-date version. This
4076 shouldn't happen again.
4078 5. When building Exim with embedded Perl support, the script that builds the
4079 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4080 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4082 6. The freeze_tell option was not being used for messages that were frozen on
4083 arrival, either by an ACL or by local_scan().
4085 7. Added the smtp_incomplete_transaction log selector.
4087 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4088 was accepting AUTH without a new EHLO.
4090 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4091 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4094 10. Logging of TCP/IP connections (when configured) now happens in the main
4095 daemon process instead of the child process, so that the TCP/IP connection
4096 count is more accurate (but it can never be perfect).
4098 11. The use of "drop" in a nested ACL was not being handled correctly in the
4099 outer ACL. Now, if condition failure induced by the nested "drop" causes
4100 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4101 or "require"), the connection is dropped.
4103 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4104 that yield "discard" can now be used with an "accept" or a "discard" verb,
4105 but an error is generated for any others (because I can't see a useful way
4106 to define what should happen).
4108 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4109 are now processed in the same way as lines in the Exim configuration file.
4110 In particular, continuation lines are supported.
4112 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4114 15. Added -ti meaning -t -i.
4116 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4117 domains, and warn by logging if others are found.
4119 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4120 returned from GIFCONF when Exim is trying to find the list of interfaces on
4121 a host. The code in os.c has been modified to copy each ifreq to an aligned
4122 structure in all cases.
4124 Also, in some cases, the returned ifreq's were being copied to a 'struct
4125 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4126 means the last couple of bytes of an IPv6 address could be chopped if the
4127 ifreq contained only a normal sockaddr (14 bytes storage).
4129 18. Named domain lists were not supported in the hosts_treat_as_local option.
4130 An entry such as +xxxx was not recognized, and was treated as a literal
4133 19. Ensure that header lines added by a DATA ACL are included in the reject log
4134 if the ACL subsequently rejects the message.
4136 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4137 MD5 (which is deprecated).
4139 21. When testing a filter file using -bf, Exim was writing a message when it
4140 took the sender from a "From " line in the message, but it was not doing so
4141 when it took $return_path from a Return-Path: header line. It now does.
4143 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4144 with a valid header line field name (a series of printing characters
4145 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4147 23. Changed "disc" in the source to "disk" to conform to the documentation and
4148 the book and for uniformity.
4150 24. Ignore Sendmail's -Ooption=value command line item.
4152 25. When execve() failed while trying to run a command in a pipe transport,
4153 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4154 could be confused with a return value of 69 from the command itself. This
4155 has been changed to 127, the value the shell returns if it is asked to run
4156 a non-existent command. The wording for the related log line suggests a
4157 non-existent command as the problem.
4159 26. If received_header_text expands to an empty string, do not add a Received:
4160 header line to the message. (Well, it adds a token one on the spool, but
4161 marks it "old" so that it doesn't get used or transmitted.)
4163 27. Installed eximstats 1.28 (addition of -nt option).
4165 28. There was no check for failure on the call to getsockname() in the daemon
4166 code. This can fail if there is a shortage of resources on the system, with
4167 ENOMEM, for example. A temporary error is now given on failure.
4169 29. Contrary to the C standard, it seems that in some environments, the
4170 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4171 program. Exim now does this explicitly; it affects the formatting of
4172 timestamps using strftime().
4174 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4175 complaints. I've now initialized all the variables, to avoid this.
4177 32. Header lines added by a system filter were not being "seen" during
4178 transport-time rewrites.
4180 33. The info_callback() function passed to OpenSSL is set up with type void
4181 (*)(SSL *, int, int), as described somewhere. However, when calling the
4182 function (actually a macro) that sets it up, the type void(*)() is
4183 expected. I've put in a cast to prevent warnings from picky compilers.
4185 34. If a DNS black list lookup found a CNAME record, but there were no A
4186 records associated with the domain it pointed at, Exim crashed.
4188 35. If a DNS black list lookup returned more than one A record, Exim ignored
4189 all but the first. It now scans all returned addresses if a particular IP
4190 value is being sought. In this situation, the contents of the
4191 $dnslist_value variable are a list of all the addresses, separated by a
4194 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4195 to accept a host name and all its aliases if the forward lookup for any of
4196 them yielded the IP address of the incoming connection. Now it accepts only
4197 those names whose forward lookup yields the correct IP address. Any other
4198 names are discarded. This closes a loophole whereby a rogue DNS
4199 administrator could create reverse DNS records to break through a
4200 wildcarded host restriction in an ACL.
4202 37. If a user filter or a system filter that ran in a subprocess used any of
4203 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4204 the wrong values were passed to the pipe command ($thisaddress had the
4205 value of $0, $0 had the value of $1, etc). This bug was introduced by
4206 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4208 38. Improved the line breaking for long SMTP error messages from ACLs.
4209 Previously, if there was no break point between 40 and 75 characters, Exim
4210 left the rest of the message alone. Two changes have been made: (a) I've
4211 reduced the minimum length to 35 characters; (b) if it can't find a break
4212 point between 35 and 75 characters, it looks ahead and uses the first one
4213 that it finds. This may give the occasional overlong line, but at least the
4214 remaining text gets split now.
4216 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4217 file descriptors might be low, and that setting 1000 would always raise it.
4218 It turns out that in some environments, the limit is already over 1000 and
4219 that lowering it causes trouble. So now Exim takes care not to decrease it.
4221 40. When delivering a message, the value of $return_path is set to $sender_
4222 address at the start of routing (routers may change the value). By an
4223 oversight, this default was not being set up when an address was tested by
4224 -bt or -bv, which affected the outcome if any router or filter referred to
4227 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4228 log only when "message" or "log_message" are set. However, if one of the
4229 conditions was an address verification, or a call to a nested ACL, the
4230 messages generated by the underlying test were being passed through. This
4231 no longer happens. The underlying message is available in $acl_verify_
4232 message for both "message" and "log_message" expansions, so it can be
4233 passed through if needed.
4235 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4236 new expansion $bh_ to give the encoded byte string without charset
4237 translation. Translation happens only if iconv() is available; HAVE_ICONV
4238 indicates this at build time. HEADERS_CHARSET gives the charset to
4239 translate to; headers_charset can change it in the configuration, and
4240 "headers charset" can change it in an individual filter file.
4242 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4243 that creates RFC 2047 encoded "words" labels them as that charset instead
4244 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4245 expansion operator; (ii) when Exim creates a From: line for a local
4246 message; (iii) when a header line is rewritten to include a "phrase" part.
4248 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4249 buggy, causing it to skip the first lines of messages whose message ID
4250 ended in 'D'. This would not have bitten before Exim release 4.14, because
4251 message IDs were unlikely to end in 'D' before then. The effect was to have
4252 incorrect size information for certain domains.
4254 45. #include "config.h" was missing at the start of the crypt16.c module. This
4255 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4258 46. If there was a timeout during a "random" callout check, Exim treated it as
4259 a failure of the random address, and carried on sending RSET and the real
4260 address. If the delay was just some slowness somewhere, the response to the
4261 original RCPT would be taken as a response to RSET and so on, causing
4262 mayhem of various kinds.
4264 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4265 when I implemented it. It didn't allow for the fact that some option values
4266 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4267 the right test for positive values.
4269 48. Domain names in DNS records are case-independent. Exim always looks them up
4270 in lower case. Some resolvers return domain names in exactly the case they
4271 appear in the zone file, that is, they may contain uppercase letters. Not
4272 all resolvers do this - some return always lower case. Exim was treating a
4273 change of case by a resolver as a change of domain, similar to a widening
4274 of a domain abbreviation. This triggered its re-routing code and so it was
4275 trying to route what was effectively the same domain again. This normally
4276 caused routing to fail (because the router wouldn't handle the domain
4277 twice). Now Exim checks for this case specially, and just changes the
4278 casing of the domain that it ultimately uses when it transmits the message
4281 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4284 50. If a filter generated a file delivery with a non-absolute name (possible if
4285 no home directory exists for the router), the forbid_file option was not
4288 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4289 the existing equality matching.
4291 52. Exim was using ints instead of ino_t variables in some places where it was
4292 dealing with inode numbers.
4294 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4295 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4296 called TMPDIR, and if it finds it is different, it changes its value.
4298 54. The smtp_printf() function is now made available to local_scan() so
4299 additional output lines can be written before returning. There is also an
4300 smtp_fflush() function to enable the detection of a dropped connection.
4301 The variables smtp_input and smtp_batched_input are exported to
4304 55. Changed the default runtime configuration: the message "Unknown user"
4305 has been removed from the ACL, and instead placed on the localuser router,
4306 using the cannot_route_message feature. This means that any verification
4307 failures that generate their own messages won't get overridden. Similarly,
4308 the "Unrouteable address" message that was in the ACL for unverifiable
4309 relay addresses has also been removed.
4311 56. Added hosts_avoid_esmtp to the smtp transport.
4313 57. The exicyclog script was not checking for the esoteric option
4314 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4315 will work only if exicyclog is run under the appropriate euid.
4317 58. Following a discussion on the list, the rules by which Exim recognises line
4318 endings on incoming messages have been changed. The -dropcr and drop_cr
4319 options are now no-ops, retained only for backwards compatibility. The
4320 following line terminators are recognized: LF CRLF CR. However, special
4321 processing applies to CR:
4323 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4324 nor a local message in the state where . is a terminator.
4326 (ii) If a bare CR is encountered in a header line, an extra space is added
4327 after the line terminator so as not to end the header. The reasoning
4328 behind this is that bare CRs in header lines are most likely either
4329 to be mistakes, or people trying to play silly games.
4331 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4332 was being incorrectly given as 18 bytes larger than it should have been.
4333 This is a VOB (very old bug).
4335 60. This may never have affected anything current, but just in case it has:
4336 When the local host is found other than at the start of a list of hosts,
4337 the local host, those with the same MX, and any that follow, are discarded.
4338 When the list in question was part of a longer list of hosts, the following
4339 hosts (not currently being processed) were also being discarded. This no
4340 longer happens. I'm not sure if this situation could ever has previously
4343 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4346 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4347 header. This is something that is recommended in a new Internet Draft, and
4348 is something that is documented as being done by Sendmail. There are two
4349 possible values. For messages generated by the autoreply transport, Exim
4352 Auto-Submitted: auto-replied
4354 whereas for all other generated messages (e.g. bounces) it adds
4356 Auto-Submitted: auto-generated
4358 63. The "personal" condition in filters now includes a test for the
4359 Auto-Submitted: header. If it contains the string "auto-" the message it
4360 not considered personal.
4362 64. Added rcpt_include_affixes as a generic transport option.
4364 65. Added queue_only_override (default true).
4366 66. Added the syslog_duplication option.
4368 67. If what should have been the first header line of a message consisted of
4369 a space followed by a colon, Exim was mis-interpreting it as a header line.
4370 It isn't of course - it is syntactically invalid and should therefore be
4371 treated as the start of the message body. The misbehaviour could have
4372 caused a number of strange effects, including loss of data in subsequent
4373 header lines, and spool format errors.
4375 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4376 client host had authenticated. This control can now be exercised by an ACL
4377 for more flexibility.
4379 69. By default, callouts do not happen when testing with -bh. There is now a
4380 variant, -bhc, which does actually run the callout code, including
4381 consulting and updating the callout cache.
4383 70. Added support for saslauthd authentication, courtesy of Alexander
4386 71. If statvfs() failed on the spool or log directories while checking their
4387 size for availability, Exim confusingly gave the error "space shortage".
4388 Furthermore, in debugging mode it crashed with a floating point exception.
4389 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4390 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4391 serious problem, Exim now writes to the main and panic logs when this
4392 happens, with details of the failure. It then refuses to accept the
4393 incoming message, giving the message "spool directory problem" or "log
4394 directory problem" with a 421 code for SMTP messages.
4396 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4397 0, 1, and 2 exist, because some OS complain for execs without them (see
4398 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4399 descriptors. However, the code omitted to check that the open succeeded,
4400 causing mysterious errors if for some reason the permissions on /dev/null
4401 got screwed. Now Exim writes a message to the main and panic logs, and
4402 bombs out if it can't open /dev/null.
4404 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4405 interact so that it is all more flexible. It is supposed to remain
4406 backwards compatible. Also added extra_local_interfaces.
4408 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4409 to bomb out with an assertion failure - to the client this appears as a
4410 connection drop. This problem occurs in the part of the code that was taken
4411 from the Samba project. Fortunately, the assertion is in a very simple
4412 function, so I have fixed this by reproducing the function inline in the
4413 one place where it is called, and arranging for authentication to fail
4414 instead of killing the process with assert().
4416 75. The SPA client code was not working when the server requested OEM rather
4417 than Unicode encoding.
4419 76. Added code to make require_files with a specific uid setting more usable in
4420 the case where statting the file as root fails - usually a non-root-mounted
4421 NFS file system. When this happens and the failure is EACCES, Exim now
4422 forks a subprocess and does the per-uid checking as the relevant uid.
4424 77. Added process_log_path.
4426 78. If log_file_path was not explicitly set, a setting of check_log_space or
4427 check_log_inodes was ignored.
4429 79. If a space check for the spool or log partitions fails, the incident is now
4430 logged. Of course, in the latter case the data may get lost...
4432 80. Added the %p formatting code to string_format() so that it can be used to
4433 print addresses in debug_print(). Adjusted all the address printing in the
4434 debugging in store.c to use %p rather than %d.
4436 81. There was a concern that a line of code in smtp_in.c could overflow a
4437 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4438 initially expressed, the concern was not well-founded, because trailing
4439 spaces are removed early. However, if the trailing spaces were followed by
4440 a NULL, they did not get removed, so the overflow was possible. Two fixes
4443 (a) I re-wrote the offending code in a cleaner fashion.
4444 (b) If an incoming SMTP command contains a NULL character, it is rejected
4447 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4448 runs initgroups(), so that if the Exim user is in any additional groups,
4449 they will be used during message reception.
4455 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob