1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.429 2006/11/07 16:50:36 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).
269 SC/01 Use a glob alias rather than an array ref in eximstats generated
270 parser. This improves both readability and performance.
272 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
273 Don't display local sender or destination tables in eximstats unless
274 there is data to show.
275 Added average volumes into the eximstats top table text output.
277 SC/03 Collect data on the number of addresses (recipients) as well
278 as the number of messages in eximstats.
280 TF/01 Correct an error in the documentation for the redirect router. Exim
281 does (usually) call initgroups() when daemonizing.
283 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
284 with consistent privilege compared to when running as a daemon.
286 TF/03 Note in the spec that $authenticated_id is not set for local
287 submissions from trusted users.
289 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
290 Thanks to Dean Brooks <dean@iglou.com> for the patch.
292 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
293 by adding some example configuration directives to the default
294 configuration file. A little bit of work is required to uncomment the
295 directives and define how usernames and passwords are checked, but
296 there is now a framework to start from.
298 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
299 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
300 without this. I don't know how relevant this is to other LDAP libraries.
302 PH/02 Add the verb name to the "unknown ACL verb" error.
304 PH/03 Magnus Holmgren's patch for filter_prepend_home.
306 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
308 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
309 directory not expanded when it should be if an expanded home directory
310 was set for the address (which is overridden by the transport).
312 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
315 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
316 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
317 because it is too late at that time, and has no effect.
319 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
320 security issue with \' (bugzilla #107). I could not use the
321 PQescapeStringConn() function, because it needs a PGconn value as one of
324 PH/08 When testing addresses using -bt, indicate those final addresses that
325 are duplicates that would not cause an additional delivery. At least one
326 person was confused, thinking that -bt output corresponded to deliveries.
327 (Suppressing duplicates isn't a good idea as you lose the information
328 about possibly different redirections that led to the duplicates.)
330 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
331 systems where poll() doesn't work, in particular OS X.
333 PH/10 Added more information to debugging output for retry time not reached.
335 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
336 operations in malware.c.
338 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
341 PH/13 If write_rejectlog was set false when logging was sent to syslog with
342 syslog_duplication set false, log lines that would normally be written
343 both the the main log and to the reject log were not written to syslog at
346 PH/14 In the default configuration, change the use of "message" in ACL warn
347 statements to "add_header".
349 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
350 not followed by a command (e.g. "seen endif").
352 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
353 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
356 PH/17 Added extra conditions to the default value of delay_warning_condition
360 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
361 { match{$h_precedence:}{(?i)bulk|list|junk} } \
362 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
365 The Auto-Submitted: and various List- headers are standardised, whereas I
366 don't think Precedence: ever was.
368 PH/18 Refactored debugging code in route_finduser() to show more information,
369 in particular, the error code if getpwnam() issues one.
371 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
372 This is apparently needed in addition to the PH/07 change above to avoid
373 any possible encoding problems.
375 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
376 but not after initializing Perl.
378 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
379 output them only if debugging. By default they are written stderr,
380 apparently, which is not desirable.
382 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
385 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
388 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
390 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
391 authenticated or an ident call has been made. Suppress the default
392 values for $authenticated_id and $authenticated_sender (but permit -oMai
393 and -oMas) when testing with -bh.
395 PH/24 Re-jigged the order of the tests in the default configuration so that the
396 tests for valid domains and recipients precede the DNS black list and CSA
397 tests, on the grounds that those ones are more expensive.
399 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
400 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
401 This bug exists in every version of Exim that I still have, right back to
404 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
405 However, an attempt to turn on case-sensitivity in a regex key by
406 including (?-i) didn't work because the subject string was already
407 lowercased, and the effects were non-intuitive. It turns out that a
408 one-line patch can be used to allow (?-i) to work as expected.
414 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
415 other effects) broke the use of negated acl sub-conditions.
417 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
420 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
421 "Deny" causes Exim to reject the incoming connection with a 554 error.
422 Unfortunately, if there is a major crisis, such as a disk failure,
423 tcp-wrappers gives "deny", whereas what one would like would be some
424 kind of temporary error. A kludge has been added to help with this.
425 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
426 554 error is used if errno is still zero or contains ENOENT (which occurs
427 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
430 PH/03 Add -lutil to the default FreeBSD LIBS setting.
432 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
433 errors. Otherwise a message that provokes a temporary error (when other
434 messages do not) can cause a whole host to time out.
436 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
437 addresses were routed directly to files or pipes from a redirect router.
438 File deliveries just didn't batch; pipe deliveries might have suffered
441 PH/06 A failure to get a lock for a hints database would erroneously always say
442 "Failed to get write lock", even when it was really a read lock.
444 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
445 of 0600. This has been changed to use the value of the lockfile_mode
446 option (which defaults to 0600).
448 PH/08 Applied small patch from the Sieve maintainer.
450 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
451 folder from quota calculations, a direct delivery into this folder messed
452 up the contents of the maildirsize file. This was because the regex was
453 used only to exclude .Trash (or whatever) when the size of the mailbox
454 was calculated. There was no check that a delivery was happening into an
455 excluded directory. This bug has been fixed by ignoring all quota
456 processing for deliveries into excluded directories.
458 PH/10 Added the maildirfolder_create_regex option to appendfile.
464 PH/01 The code for finding all the local interface addresses on a FreeBSD
465 system running IPv6 was broken. This may well have applied to all BSD
466 systems, as well as to others that have similar system calls. The broken
467 code found IPv4 interfaces correctly, but gave incorrect values for the
468 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
469 that it would not match correctly against @[] and not recognize the IPv6
472 PH/02 The ipliteral router was not recognizing addresses of the form user@
473 [ipv6:....] because it didn't know about the "ipv6:" prefix.
475 PH/03 Added disable_ipv6.
477 PH/04 Changed $reply_address to use the raw form of the headers instead of the
478 decoded form, because it is most often used to construct To: headers
479 lines in autoreplies, and the decoded form may well be syntactically
480 invalid. However, $reply_address has leading white space removed, and all
481 newlines turned into spaces so that the autoreply transport does not
484 PH/05 If group was specified without a user on a router, and no group or user
485 was specified on a transport, the group from the router was ignored.
487 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
488 for visible compile-time settings that can be used to change these
489 numbers, for those that want even more. Backwards compatibility with old
490 spool files has been maintained. However, going back to a previous Exim
491 release will lost any variables that are in spool files.
493 PH/07 Two small changes when running in the test harness: increase delay when
494 passing a TCP/IP connection to a new process, in case the original
495 process has to generate a bounce, and remove special handling of
496 127.0.0.2 (sic), which is no longer necessary.
498 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
499 be the same on different OS.
501 PH/09 Moved a debug statement in filter processing to avoid a race problem when
504 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
505 whether --show-vars was specified or not
507 JJ/02 exipick: Added support for new ACL variable spool format introduced
510 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
511 syntactically invalid From: or Reply-to: line, and a filter used this to
512 generate an autoreply, and therefore failed to obtain an address for the
513 autoreply, Exim could try to deliver to a non-existent relative file
514 name, causing unrelated and misleading errors. What now happens is that
515 it logs this as a hard delivery error, but does not attempt to create a
518 PH/11 The exinext utility has a -C option for testing purposes, but although
519 the given file was scanned by exinext itself; it wasn't being passed on
520 when Exim was called.
522 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
523 an end-of-file indication when reading a command response.
525 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
526 compiled. In many other places in Exim, IPv6 addresses are always
527 recognized, so I have changed this. It also means that IPv4 domain
528 literals of the form [IPV4:n.n.n.n] are now always recognized.
530 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
531 used if the router is not running as root, for example, when verifying at
532 ACL time, or when using -bh. The debugging output from this situation was
533 non-existent - all you got was a failure to exec. I have made two
536 (a) Failures to set uid/gid, the current directory, or a process leader
537 in a subprocess such as that created by queryprogram now generate
538 suitable debugging ouput when -d is set.
540 (b) The queryprogram router detects when it is not running as root,
541 outputs suitable debugging information if -d is set, and then runs
542 the subprocess without attempting to change uid/gid.
544 PH/15 Minor change to Makefile for building test_host (undocumented testing
547 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
548 additional section of a DNS packet that returns MX or SRV records.
549 Instead, it always explicitly searches for A/AAAA records. This avoids
550 major problems that occur when a DNS server includes only records of one
551 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
552 fixed another bug: if SRV records were looked up and the corresponding
553 address records were *not* found in the additional section, the port
554 values from the SRV records were lost.
556 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
557 using the correct key (the original address) when searching the retry
558 rules in order to find which one to use for generating the retry hint.
560 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
561 adding the default one. Similarly, if it contains a Reply-To: header, the
562 errors_reply_to option, if set, is not used.
564 PH/19 When calculating a retry time, Exim used to measure the "time since
565 failure" by looking at the "first failed" field in the retry record. Now
566 it does not use this if it is later than than the arrival time of the
567 message. Instead it uses the arrival time. This makes for better
568 behaviour in cases where some deliveries succeed, thus re-setting the
569 "first failed" field. An example is a quota failure for a huge message
570 when small messages continue to be delivered. Without this change, the
571 "time since failure" will always be short, possible causing more frequent
572 delivery attempts for the huge message than are intended.
573 [Note: This change was subsequently modified - see PH/04 for 4.62.]
575 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
576 $1, $2, $3) because the numerical variables can be reset during some
577 expansion items (e.g. "match"), thereby losing the authentication data.
579 PH/21 Make -bV show the size of off_t variables so that the test suite can
580 decide whether to run tests for quotas > 2G.
582 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
583 mailbox_size, and mailbox_filecount in the appendfile transport. If a
584 filecount value is greater than 2G or if a quota value is greater than 2G
585 on a system where the size of off_t is not greater than 4, a panic error
588 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
589 never match. The debug and -bh output now contains an explicit error
590 message indicating a malformed IPv4 address or mask.
592 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
593 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
596 PH/25 Do not write to syslog when running in the test harness. The only
597 occasion when this arises is a failure to open the main or panic logs
598 (for which there is an explicit test).
600 PH/26 Added the /no_tell option to "control=freeze".
602 PH/27 If a host name lookup failed very early in a connection, for example, if
603 the IP address matched host_lookup and the reverse lookup yielded a name
604 that did not have a forward lookup, an error message of the form "no IP
605 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
606 could be logged. Now it outputs the IP address instead of "NULL".
608 PH/28 An enabling patch from MH: add new function child_open_exim2() which
609 allows the sender and the authenticated sender to be set when
610 submitting a message from within Exim. Since child_open_exim() is
611 documented for local_scan(), the new function should be too.
613 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
614 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
615 results in an empty string is now treated as unset.
617 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
619 PH/31 Added sender_verify_fail logging option.
621 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
622 needed by RFC 822 but not by RFC 2822 was commented out. I have now
623 tidied the source and removed it altogether.
625 PH/33 When a queue run was abandoned because the load average was too high, a
626 log line was always written; now it is written only if the queue_run log
627 selector is set. In addition, the log line for abandonment now contains
628 information about the queue run such as the pid. This is always present
629 in "start" and "stop" lines but was omitted from the "abandon" line.
631 PH/34 Omit spaces between a header name and the colon in the error message that
632 is given when verify = headers_syntax fails (if there are lots of them,
633 the message gets confusing).
635 PH/35 Change the default for dns_check_names_pattern to allow slashes within
636 names, as there are now some PTR records that contain slashes. This check
637 is only to protect against broken name servers that fall over on strange
638 characters, so the fact that it applies to all lookups doesn't matter.
640 PH/36 Now that the new test suite is complete, we can remove some of the
641 special code in Exim that was needed for the old test suite. For example,
642 sorting DNS records because real resolvers return them in an arbitrary
643 order. The new test suite's fake resolver always returns records in the
646 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
647 bounces) except when queue_only is set, to avoid logging races between
648 the different processes.
650 PH/38 Panic-die if .include specifies a non-absolute path.
652 PH/39 A tweak to the "H" retry rule from its user.
654 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
655 a label. They prevented compilation on older perls.
657 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
658 a warning to be raised on newish perls.
660 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
661 on queue. Changes to match documented behaviour of showing count of
662 messages matching specified criteria.
664 PH/40 Changed the default ident timeout from 30s to 5s.
666 PH/41 Added support for the use of login_cap features, on those BSD systems
667 that have them, for controlling the resources used by pipe deliveries.
669 PH/42 The content-scanning code uses fopen() to create files in which to put
670 message data. Previously it was not paying any attention to the mode of
671 the files. Exim runs with umask(0) because the rest of the code creates
672 files with open(), and sets the required mode explicitly. Thus, these
673 files were ending up world-writeable. This was not a big issue, because,
674 being within the spool directory, they were not world-accessible. I have
675 created a function called modefopen, which takes an additional mode
676 argument. It sets umask(777), creates the file, chmods it to the required
677 mode, then resets the umask. All the relevant calls to fopen() in the
678 content scanning code have been changed to use this function.
680 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
681 to 24 hours. This avoids potential overflow problems when processing G
682 and H retry rules. I suspect nobody ever tinkers with this value.
684 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
686 PH/45 When the plaintext authenticator is running as a client, the server's
687 challenges are checked to ensure they are valid base64 strings. By
688 default, the authentication attempt is cancelled if an invalid string is
689 received. Setting client_ignore_invalid_base64 true ignores these errors.
690 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
691 they are received. Thus, the responses can be made to depend on the
692 challenges. If an invalid string is ignored, an empty string is placed in
695 PH/46 Messages that are created by the autoreply transport now contains a
696 References: header, in accordance with RFCs 2822 and 3834.
698 PH/47 Added authenticated_sender_force to the smtp transport.
700 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
702 PH/49 Installed latest patch from the Sieve maintainer.
704 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
705 was also set, the appendfile transport was unnecessarily scanning a
706 directory of message files (e.g. for maildir delivery) to find the count
707 of files (along with the size), even though it did not need this
708 information. It now does the scan only if it needs to find either the
709 size of the count of files.
711 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
713 PH/52 Two bugs concerned with error handling when the smtp transport is
716 (i) Exim was not creating retry information for temporary errors given
717 for individual recipients after the DATA command when the smtp transport
718 was used in LMTP mode. This meant that they could be retried too
719 frequently, and not timed out correctly.
721 (ii) Exim was setting the flag that allows error details to be returned
722 for LMTP errors on RCPT commands, but not for LMTP errors for individual
723 recipients that were returned after the DATA command.
725 PH/53 This is related to PH/52, but is more general: for any failing address,
726 when detailed error information was permitted to be returned to the
727 sender, but the error was temporary, then after the final timeout, only
728 "retry timeout exceeded" was returned. Now it returns the full error as
729 well as "retry timeout exceeded".
731 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
732 do this, and (what is worse) MTAs that accept it.
734 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
735 will now be deprecated.
737 PH/56 New os.c-cygwin from the Cygwin maintainer.
739 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
740 formats (previously only available in exim formats via -bpr, -bpru,
741 and -bpra. Now also available in native and exiqgrep formats)
743 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
744 with very large, slow to parse queues
746 JJ/08 exipick: added ! as generic prefix to negate any criteria format
748 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
750 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
751 responses to authentication challenges, though it was showing the
752 challenges; (ii) I've removed the CR characters from the debug output for
755 PH/58 Allow for the insertion of a newline as well as a space when a string
756 is turned into more than one encoded-word during RFC 2047 encoding. The
757 Sieve code now uses this.
759 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
760 data_4xx, lost_connection, tls_required.
762 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
763 message was being sent as an SMTP response.
765 PH/61 Add -l and -k options to exicyclog.
767 PH/62 When verifying, if an address was redirected to one new address, so that
768 verification continued, and the new address failed or deferred after
769 having set something in $address_data, the value of $address_data was not
770 passed back to the ACL. This was different to the case when no
771 redirection occurred. The value is now passed back in both cases.
773 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
774 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
775 use login_cap.h, so on its own it isn't the distinguishing feature. The
776 new name refers directly to the setclassresources() function.
778 PH/65 Added configuration files for NetBSD3.
780 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
782 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
783 is preferred over IPv4.
785 PH/68 The bounce_return_message and bounce_return_body options were not being
786 honoured for bounces generated during the reception of non-SMTP messages.
787 In particular, this applied to messages rejected by the ACL. This bug has
788 been fixed. However, if bounce_return_message is true and bounce_return_
789 body is false, the headers that are returned for a non-SMTP message
790 include only those that have been read before the error was detected.
791 (In the case of an ACL rejection, they have all been read.)
793 PH/69 The HTML version of the specification is now built in a directory called
794 spec_html instead of spec.html, because the latter looks like a path with
795 a MIME-type, and this confuses some software.
797 PH/70 Catch two compiler warnings in sieve.c.
799 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
800 function verify_get_ident() calls ip_connect() to connect a socket, but
801 if the "connect()" function timed out, ip_connect() used to close the
802 socket. However, verify_get_ident() also closes the socket later, and in
803 between Exim writes to the log, which may get opened at this point. When
804 the socket was closed in ip_connect(), the log could get the same file
805 descriptor number as the socket. This naturally causes chaos. The fix is
806 not to close the socket in ip_connect(); the socket should be closed by
807 the function that creates it. There was only one place in the code where
808 this was missing, in the iplookup router, which I don't think anybody now
809 uses, but I've fixed it anyway.
811 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
812 well as to direct DNS lookups. Otherwise the handling of names in host
813 lists is inconsistent and therefore confusing.
819 PH/01 Two changes to the default runtime configuration:
821 (1) Move the checks for relay_from_hosts and authenticated clients from
822 after to before the (commented out) DNS black list checks.
824 (2) Add control=submission to the relay_from_hosts and authenticated
825 clients checks, on the grounds that messages accepted by these
826 statements are most likely to be submissions.
828 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
830 (1) Generate an error if the third argument for the ${prvs expansion is
833 (2) Treat a missing third argument of ${prvscheck as if it were an empty
836 (3) Reset the variables that are obtained from the first argument of
837 ${prvscheck and used in the second argument before leaving the code,
838 because their memory is reclaimed, so using them afterwards may do
841 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
842 one (it's much easier than Tom thought :-).
844 (5) Because of (4), we can now allow for the use of $prvscheck_result
845 inside the third argument.
847 PH/03 For some reason, the default setting of PATH when running a command from
848 a pipe transport was just "/usr/bin". I have changed it to
851 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
852 anything to be listed in the output from -bV.
854 PH/05 When a filter generated an autoreply, the entire To: header line was
855 quoted in the delivery log line, like this:
857 => >A.N.Other <ano@some.domain> <original@ddress> ...
859 This has been changed so that it extracts the operative address. There
860 may be more than one such address. If so, they are comma-separated, like
863 => >ano@some.domain,ona@other.domain <original@ddress> ...
865 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
866 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
867 not being looked up in the rDNS to get a host name, Exim was showing the
868 IP address twice in Received: lines, even though the IP addresses were
869 identical. For example:
871 Received: from [1.2.3.4] (helo=[1.2.3.4])
873 However, if the real host name was known, it was omitting the HELO data
874 if it matched the actual IP address. This has been tidied up so that it
875 doesn't show the same IP address twice.
877 PH/07 When both +timestamp and +memory debugging was on, the value given by
878 $tod_xxx expansions could be wrong, because the tod_stamp() function was
879 called by the debug printing, thereby overwriting the timestamp buffer.
880 Debugging no longer uses the tod_stamp() function when +timestamp is set.
882 PH/08 When the original message was included in an autoreply transport, it
883 always said "this is a copy of the message, including all the headers",
884 even if body_only or headers_only was set. It now gives an appropriate
887 PH/09 Applied a patch from the Sieve maintainer which:
889 o fixes some comments
890 o adds the (disabled) notify extension core
891 o adds some debug output for the result of if/elsif tests
892 o points to the current vacation draft in the documentation
893 and documents the missing references header update
897 o fixes a bug in processing the envelope test (when testing
898 multiple envelope elements, the last element determinted the
901 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
902 Electronic Mail") by including:
904 Auto-submitted: auto-generated
906 in the messages that it generates (bounce messages and others, such as
907 warnings). In the case of bounce messages for non-SMTP mesages, there was
908 also a typo: it was using "Auto_submitted" (underscore instead of
909 hyphen). Since every message generated by Exim is necessarily in response
910 to another message, thes have all been changed to:
912 Auto-Submitted: auto-replied
914 in accordance with these statements in the RFC:
916 The auto-replied keyword:
918 - SHOULD be used on messages sent in direct response to another
919 message by an automatic process,
921 - MUST NOT be used on manually-generated messages,
923 - MAY be used on Delivery Status Notifications (DSNs) and Message
924 Disposition Notifications (MDNs),
926 - MUST NOT be used on messages generated by automatic or periodic
927 processes, except for messages which are automatic responses to
930 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
931 to the default Received: header definition.
933 PH/12 Added log selector acl_warn_skipped (default on).
935 PH/13 After a successful wildlsearch lookup, discard the values of numeric
936 variables because (a) they are in the wrong storage pool and (b) even if
937 they were copied, it wouldn't work properly because of the caching.
939 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
940 checking when decoding. Apparently there are clients that generate
941 overlong encoded strings. Why am I not surprised?
943 PH/15 If the first argument of "${if match_address" was not empty, but did not
944 contain an "@" character, Exim crashed. Now it writes a panic log message
945 and treats the condition as false.
947 PH/16 In autoreply, treat an empty string for "once" the same as unset.
949 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
950 extension "envelope-auth". The code is finished and in agreement with
951 other implementations, but there is no documentation so far and in fact,
952 nobody wrote the draft yet. This extension is currently #undef'ed, thus
953 not changing the active code.
955 Print executed "if" and "elsif" statements when debugging is used. This
956 helps a great deal to understand what a filter does.
958 Document more things not specified clearly in RFC3028. I had all this
959 sorted out, when out of a sudden new issues came to my mind. Oops."
961 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
964 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
965 canonical form (as documented). However, after a host name lookup from
966 the IP address, check_host() was doing a simple string comparison with
967 addresses acquired from the DNS when checking that the found name did
968 have the original IP as one of its addresses. Since any found IPv6
969 addresses are likely to be in abbreviated form, the comparison could
970 fail. Luckily, there already exists a function for doing the comparison
971 by converting both addresses to binary, so now that is used instead of
974 PH/20 There was another similar case to PH/19, when a complete host name was
975 given in a host list; looking up its IP address could give an abbreviated
976 form, whereas the current host's name might or might not be abbreviated.
977 The same fix has been applied.
983 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
984 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
987 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
988 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
990 PH/03 Typo: missing ".o" in src/pcre/Makefile.
992 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
993 header line, restrict the check to what is listed in RFCs 2369 and 2929.
994 Also, for "Auto-Submitted", treat anything other than "no" as
995 non-personal, in accordance with RFC 3834. (Previously it treated
996 anything starting "auto-" as non-personal.)
998 TF/01 The control=submission/name=... option had a problem with syntax
999 errors if the name included a slash character. The /name= option
1000 now slurps the rest of the string, so it can include any characters
1001 but it must come last in the list of options (after /sender_retain
1004 PH/05 Some modifications to the interface to the fake nameserver for the new
1012 TK/01 Added the "success_on_redirect" address verification option. See
1013 NewStuff for rationale and an example.
1015 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1017 PH/02 Patch to exigrep to allow it to work on syslog lines.
1019 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1020 fread() to skip over the body file's header line, because in Cygwin the
1021 header line is locked and is inaccessible.
1023 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1024 co-exist for some time) to make it clear that it is the Exim ID that is
1025 referenced, not the Message-ID: header line.
1027 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1028 string_format() function, because snprintf() does not exist on all
1031 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1032 ${stat: expansion item.
1034 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1035 protocol synchronization error", to keep the pedants happy.
1037 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1038 well as for IRIX systems, when gcc is being used. See the host.c source
1041 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1043 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1046 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1047 transport and to the smtp transport in LMTP mode.
1049 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1051 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1052 run a filter in a subprocess. This could lead to confusion in subsequent
1053 lookups in the parent process. There should also be a search_tidyup() at
1054 the end of the subprocess.
1056 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1057 only if the host matched helo_try_verify_hosts, which caused the
1058 verification to occur when the EHLO/HELO command was issued. The ACL just
1059 tested the remembered result. Now, if a previous verification attempt has
1060 not happened, "verify = helo" does it there and then.
1062 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1064 TK/03 Fix log output including CR from clamd.
1066 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1067 exist provoked a memory error which could cause a segfault.
1069 PH/15 Installed PCRE 6.2
1071 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1073 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1074 of the problem. Specifically, suggested +O2 rather than +O1 for the
1077 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1079 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1080 record, the port was not correctly logged when the outgoing_port log
1081 selector was set (it logged the transort's default port).
1083 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1084 fallback_hosts, and "hosts" in the smtp transport.
1086 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1087 host errors such as "Connection refused".
1089 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1090 authentication with radiusclient 0.4.9:
1092 - Error returned from rc_read_config was caught wrongly
1093 - Username/password not passed on to radius server due to wrong length.
1095 The presumption is that some radiusclient API changes for 4.51/PH/17
1096 were not taken care of correctly. The code is still untested by me (my
1097 Linux distribution still has 0.3.2 of radiusclient), but it was
1098 contributed by a Radius user.
1100 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1101 expanding the "port" option of the smtp transport.
1103 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1104 while reading a MIME header. Thanks to Tom Hughes for a patch.
1106 PH/24 Include config.h inside local_scan.h so that configuration settings are
1109 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1110 that in an ACL for RCPT (for example), you can examine exactly what was
1113 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1114 commands, but it was not correctly comparing the address with the actual
1115 client host address. Thus, it would show the EHLO address in Received:
1116 header lines when this was not necessary.
1118 PH/27 Added the % operator to ${eval:}.
1120 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1121 it should be ignoring failures (because with -C, for example, it has lost
1122 privilege). It wasn't ignoring creation failures other than "already
1125 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1128 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1129 because an input line was too long, either on its own, or by virtue of
1130 too many continuations, the temporary file was not being removed, and the
1131 return code was incorrect.
1133 PH/31 Missing "BOOL" in function definition in filtertest.c.
1135 PH/32 Applied Sieve patches from the maintainer.
1137 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1139 PH/33 Added "verify = not_blind".
1141 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1142 Local/Makefile (with some defaults set). These are used in built scripts
1143 such as exicyclog, but they have never been used in the exim_install
1144 script (though there are many overriding facilities there). I have
1145 arranged that the exim_install script now takes note of these two
1148 PH/35 Installed configuration files for Dragonfly.
1150 PH/36 When a locally submitted message by a trusted user did not contain a
1151 From: header, and the sender address was obtained from -f or from an SMTP
1152 MAIL command, and the trusted user did not use -F to supply a sender
1153 name, $originator_name was incorrectly used when constructing a From:
1154 header. Furthermore, $originator_name was used for submission mode
1155 messages from external hosts without From: headers in a similar way,
1156 which is clearly wrong.
1158 PH/37 Added control=suppress_local_fixups.
1160 PH/38 When log_selector = +received_sender was set, and the addition of the
1161 sender made the log line's construction buffer exactly full, or one byte
1162 less than full, an overflow happened when the terminating "\n" was
1165 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1166 when the result of a list match is failure because a DNS lookup failed.
1168 PH/40 RM_COMMAND is now used in the building process.
1170 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1171 the "build-* directories that it finds.
1173 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1174 address in a domain literal was a prefix of an interface address.
1176 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1177 when verifying a sender address, unless rewrite_headers is false.
1179 PH/44 Wrote a long comment about why errors_to addresses are verified as
1180 recipients, not senders.
1182 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1183 the ratelimit ACL was added.
1185 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1187 PH/46 Added extra information about PostgreSQL errors to the error string.
1189 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1190 avoiding the need to install special zones in a real server. This is
1191 backwards compatible; if it can't find the fake resolver, it drops back.
1192 Thus, both old and new test suites can be run.
1194 TF/02 Added util/ratelimit.pl
1196 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1197 clock is set back in time.
1199 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1200 Candler <B.Candler@pobox.com>.
1202 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1203 OK for addresses that are the result of redirections.
1205 PH/48 A number of further additions for the benefit of the new test suite,
1206 including a fake gethostbyname() that interfaces to the fake DNS resolver
1209 TF/06 The fix for widen_domains has also been applied to qualify_single and
1210 search_parents which are the other dnslookup options that can cause
1213 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1216 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1218 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1219 service" if it encountered an MX record with an empty target hostname.
1220 The message is now "an MX or SRV record indicated no SMTP service".
1222 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1223 if the DNS of the sending site is misconfigured. This is quite a
1224 common situation. This change restores the behaviour of treating a
1225 helo verification defer as a failure.
1227 PH/51 If self=fail was set on a router, the bounce message did not include the
1228 actual error message.
1234 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1236 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1237 command itself ended in error, the underlying message about the transport
1238 filter timeout was being overwritten with the pipe command error. Now the
1239 underlying error message should be appended to the second error message.
1241 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1243 PH/02 Reduce the amount of output that "make" produces by default. Full output
1244 can still be requested.
1246 PH/03 The warning log line about a condition test deferring for a "warn" verb
1247 was being output only once per connection, rather than after each
1248 occurrence (because it was using the same function as for successful
1249 "warn" verbs). This seems wrong, so I have changed it.
1251 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1252 it should not have, which might have caused a crash in the right
1253 circumstances, but probably never did.
1255 PH/04 Installed a modified version of Tony Finch's patch to make submission
1256 mode fix the return path as well as the Sender: header line, and to
1257 add a /name= option so that you can make the user's friendly name appear
1260 TF/03 Added the control = fakedefer ACL modifier.
1262 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1263 Mark Lowes for thorough testing.
1265 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1267 TK/03 Merged latest SRS patch from Miles Wilton.
1269 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1270 with the definition in sysexits.h (which is #included earlier).
1271 Fortunately, Exim does not actually use EX_OK. The code used to try to
1272 preserve the sysexits.h value, by assumimg that macro definitions were
1273 scanned for macro replacements. I have been disabused of this notion,
1274 so now the code just undefines EX_OK before #including unistd.h.
1276 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1277 in the smtp transport. When a block could not be written in a single
1278 write() function, the timeout was being re-applied to each part-write.
1279 This seems wrong - if the receiver was accepting one byte at a time it
1280 would take for ever. The timeout is now adjusted when this happens. It
1281 doesn't have to be particularly precise.
1283 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1284 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1286 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1287 without a domain if the check to <postmaster@domain> fails.
1289 SC/01 Eximstats: added -xls and the ability to specify output files
1290 (patch written by Frank Heydlauf).
1292 SC/02 Eximstats: use FileHandles for outputing results.
1294 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1296 SC/04 Eximstats: fixed display of large numbers with -nvr option
1298 SC/05 Eximstats: fixed merging of reports with empty tables.
1300 SC/06 Eximstats: added the -include_original_destination flag
1302 SC/07 Eximstats: removed tabs and trailing whitespace.
1304 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1306 TK/06 MBOX spool code: Add real "From " MBOX separator line
1307 so the .eml file is really in mbox format (even though
1308 most programs do not really care). Patch from Alex Miller.
1310 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1311 The latter is generated from $received_to and is only set if the
1312 message has one envelope recipient. SA can use these headers,
1313 obviously out-of-the-box. Patch from Alex Miller.
1315 PH/08 The ${def test on a variable was returning false if the variable's
1316 value was "0", contrary to what the specification has always said!
1317 The result should be true unless the variable is empty.
1319 PH/09 The syntax error of a character other than { following "${if
1320 def:variable_name" (after optional whitespace) was not being diagnosed.
1321 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1322 accidental colon was present, for example, could give incorrect results.
1324 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1325 result is used (not including appendfile, where other changes are about
1328 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1329 This involved changing a lot of size variables from int to off_t. It
1330 should work with maildirs and everything.
1332 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1333 spamd dying while we are connected to it.
1335 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1338 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1339 function for BDB 4.3.
1341 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1343 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1344 the sources for PCRE have been re-arranged and more files are now
1347 PH/15 The code I had for printing potentially long long variables in PH/11
1348 above was not the best (it lost precision). The length of off_t variables
1349 is now inspected at build time, and an appropriate printing format (%ld
1350 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1351 to be "long long int" or "long int". This is needed for the internal
1352 formatting function string_vformat().
1354 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1355 the configuration file to be ":syslog", then the script "guesses" where
1356 the logs files are, rather than using the compiled in default. In our
1357 case the guess is not the same as the compiled default, so the script
1358 suddenly stopped working when I started to use syslog. The patch checks
1359 to see if log_file_path is "". If so, it attempts to read it from exim
1360 with no configuration file to get the compiled in version, before it
1361 falls back to the previous guessing code."
1363 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1364 implementing BATV in an Exim configuration. See NewStuff for the gory
1367 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1368 Makefile that are specific to HP-UX.
1370 PH/18 If the "use_postmaster" option was set for a recipient callout together
1371 with the "random" option, the postmaster address was used as the MAIL
1372 FROM address for the random test, but not for the subsequent recipient
1373 test. It is now used for both.
1375 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1376 patch removes a few documentation additions to RFC 3028, because the
1377 latest draft now contains them. It adds the new en;ascii-case comparator
1378 and a new error check for 8bit text in MIME parts. Comparator and
1379 require names are now matched exactly. I enabled the subaddress
1380 extension, but it is not well tested yet (read: it works for me)."
1382 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1383 rework some of the code of TK/09 above to avoid the hardwired use of
1384 "%lld" and "long long". Replaced the call to snprintf() with a call to
1387 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1388 records point to non-existent hosts", "retry timeout exceeded", and
1389 "retry time not reached for any host after a long failure period".
1391 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1392 experimental DomainKeys support:
1394 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1395 (2) On an error such as an illegally used "control", the wrong name for
1396 the control was given.
1398 These problems did NOT occur unless DomainKeys support was compiled.
1400 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1402 PH/24 Added ${if match_ip condition.
1404 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1405 databases so that it will be absolutely obvious if a crash occurs in the
1406 DB library. This is a regular occurrence (often caused by mis-matched
1409 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1410 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1411 picked up on a user's system that detects such things. There doesn't seem
1412 to be a gcc warning option for this - only an attribute that has to be
1413 put on the function's prototype. It seems that in Fedora Core 4 they have
1414 set this on a number of new functions. No doubt there will be more in due
1417 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1418 specify a transport. However, if an address that was verified by such a
1419 router was the subject of a callout, Exim crashed because it tried to
1420 read the rcpt_include_affixes from the non-existent transport. Now it
1421 just assumes that the setting of that option is false. This bug was
1422 introduced by 4.51/PH/31.
1424 PH/28 Changed -d+all to exclude +memory, because that information is very
1425 rarely of interest, but it makes the output a lot bigger. People tend to
1426 do -d+all out of habit.
1428 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1429 code in os-type was giving problems when libc.so lives in lib64, like on
1432 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1433 aren't the modern standard, and it seems that some systems' include files
1434 don't always have them. Exim was already checking for some of the newer
1435 ones like T_AAAA, and defining it itself. I've added checks for all the
1436 record types that Exim uses.
1438 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1439 not automatically generating a new one, as it is supposed to. This
1440 prevented TLS from working. If the file did exist, but contained invalid
1441 data, a new version was generated, as expected. It was only the case of a
1442 non-existent file that was broken.
1444 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1445 with a change in libdomainkeys > 0.64.
1447 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1448 from DNS. If the selector record carries the flag, it now has
1449 precedence over the domain-wide flag.
1451 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1453 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1454 the use of a port name that isn't defined in /etc/services) occurred, the
1455 message was deferred as in a normal delivery, and thus remained on the
1456 spool, instead of being failed because of the mua_wrapper setting. This
1457 is now fixed, and I tidied up some of the mua_wrapper messages at the
1460 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1461 the messages in a hash of arrays rather than using individual hashes.
1462 This is a bit cleaner and results in dramatic memory savings, albeit
1463 at a slight CPU cost.
1465 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1466 as requested by Marc Sherman.
1468 SC/10 Eximstats: added histograms for user specified patterns as requested
1471 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1473 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1474 fopen() in the content-scanning modules that did not already have it.
1480 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1481 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1483 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1485 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1487 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1488 to test Sieve filters that use "vacation".
1490 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1491 that changes the way the GnuTLS parameters are stored in the cache file.
1492 The new format can be generated externally. For backward compatibility,
1493 if the data in the cache doesn't make sense, Exim assumes it has read an
1494 old-format file, and it generates new data and writes a new file. This
1495 means that you can't go back to an older release without removing the
1498 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1499 work if there are any delivery delays because "one_time" forces the
1500 parent to be marked "delivered", so its unseen clone is never tried
1501 again. For this reason, Exim now forbids the simultaneous setting of
1504 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1505 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1506 entry if you want to know the details. The fix, however, neglected to
1507 consider the case when local delivery batching is involved. The test for
1508 "previously delivered" was not happening when checking to see if an
1509 address could be batched with a previous (undelivered) one; under
1510 certain circumstances this could lead to multiple deliveries to the same
1513 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1514 in its include files, and this causes problems building Exim.
1516 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1517 header_syntax) but Exim was just ignoring anything given after a slash.
1518 In particular, this caused confusion with an attempt to use "verify =
1519 reverse_host_lookup/defer_ok". An error is now given when options are
1520 supplied for verify items that do not have them. (Maybe reverse_host_
1521 lookup should have a defer_ok option, but that's a different point.)
1523 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1524 defined by RFC 821) to 2048, because there were problems with some AUTH
1525 commands, and RFC 1869 says the size should be increased for extended
1526 SMTP commands that take arguments.
1528 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1531 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1532 "unknown" error; now it says that the functionality isn't in the binary.
1534 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1535 an address' error message when a string expansion fails (syntax or
1536 whatever). Otherwise the password may appear in the log. Following change
1537 PH/42 below, there is no longer a chance of it appearing in a bounce
1540 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1542 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1543 of its addresses was ever tried. (Bugzilla bug #2.)
1545 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1546 the result incorrectly in the debug output. (It correctly added a newline
1547 to what was transported.)
1549 TF/01 Added $received_time.
1551 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1552 commented out examples of how to interface to a virus scanner and to
1553 SpamAssassin. Also added commented examples of av_scanner and
1554 spamd_address settings.
1556 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1557 and controls are allowed in which ACLs. There were a couple of minor
1558 errors. Some of the entries in the conditions table (which is a table of
1559 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1560 negation of where the condition IS allowed.
1562 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1564 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1565 header file does not have a version number, so I've had to invent a new
1566 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1567 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1568 radiusclient), but it was contributed by a Radius user.
1570 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1571 files or directories, for OpenSSL.
1573 PH/19 When an Exim process that is running as root has to create an Exim log
1574 file, it does so in a subprocess that runs as exim:exim so as to get the
1575 ownership right at creation (otherwise, other Exim processes might see
1576 the file with the wrong ownership). There was no test for failure of this
1577 fork() call, which would lead to the process getting stuck as it waited
1578 for a non-existent subprocess. Forks do occasionally fail when resources
1579 run out. I reviewed all the other calls to fork(); they all seem to check
1582 PH/20 When checking for unexpected SMTP input at connect time (before writing
1583 the banner), Exim was not dealing correctly with a non-positive return
1584 from the read() function. If the client had disconnected by this time,
1585 the result was a log entry for a synchronization error with an empty
1586 string after "input=" when read() returned zero. If read() returned -1
1587 (an event I could not check), uninitialized data bytes were printed.
1588 There were reports of junk text (parts of files, etc) appearing after
1591 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1593 PH/22 Added support for macro redefinition, and (re)definition in between
1594 driver and ACL definitions.
1596 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1597 forgetting to use the resulting value; it was using the unexpanded value.
1599 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1600 hadn't been configured. The fix is from Juergen Kreileder, who
1601 understands it better than I do:
1603 "Here's what I see happening with three configured cyrus_sasl
1604 authenticators configured (plain, login, cram-md5):
1606 On startup auth_cyrus_sasl_init() gets called for each of these.
1607 This means three calls to sasl_listmech() without a specified mech_list.
1608 => SASL tests which mechs of all available mechs actually work
1609 => three warnings about OTP not working
1610 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1612 With the patch, sasl_listmech() also gets called three times. But now
1613 SASL's mech_list option is set to the server_mech specified in the the
1614 authenticator. Or in other words, the answer from sasl_listmech()
1615 gets limited to just the mech you're testing for (which is different
1617 => the return list contains just 'plain' or 'login', 'cram-md5' or
1618 nothing depending on the value of ob->server_mech.
1620 I've just tested the patch: Authentication still works fine,
1621 unavailable mechs specified in the exim configuration are still
1622 caught, and the auth.log warnings about OTP are gone."
1624 PH/25 When debugging is enabled, the contents of the command line are added
1625 to the debugging output, even when log_selector=+arguments is not
1628 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1629 answer is "GNU", and only if the return is "GNU/something" is the answer
1632 PH/27 $acl_verify_message is now set immediately after the failure of a
1633 verification in an ACL, and so is available in subsequent modifiers. In
1634 particular, the message can be preserved by coding like this:
1636 warn !verify = sender
1637 set acl_m0 = $acl_verify_message
1639 Previously, $acl_verify_message was set only while expanding "message"
1640 and "log_message" when a very denied access.
1642 PH/28 Modified OS/os.c-Linux with
1644 -#ifndef OS_LOAD_AVERAGE
1645 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1647 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1648 nomenclature these days.)
1650 PH/29 Installed patch from the Sieve maintainer that adds the options
1651 sieve_useraddress and sieve_subaddress to the redirect router.
1653 PH/30 In these circumstances:
1654 . Two addresses routed to the same list of hosts;
1655 . First host does not offer TLS;
1656 . First host accepts first address;
1657 . First host gives temporary error to second address;
1658 . Second host offers TLS and a TLS session is established;
1659 . Second host accepts second address.
1660 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1661 and peerdn, if requested) that were in fact used only for the second
1664 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1665 attention to any local part prefix or suffix that was matched by the
1666 router that accepted the address. It now behaves in the same way as it
1667 does for delivery: the affixes are removed from the local part unless
1668 rcpt_include_affixes is set on the transport.
1670 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1671 timeout during the DATA phase of an incoming message.
1673 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1674 applied a patch sanctioned by the Sieve maintainer.
1676 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1677 the uid or gid is negative. A case of a negative gid caused this to be
1678 noticed. The fix allows for either to be negative.
1680 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1681 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1684 PH/36 The change PH/12 above was broken. Fixed it.
1686 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1687 the grounds that routing the same address twice would always produce the
1688 same answer. This might have been true once, but it is certainly no
1689 longer true now. Routing a child address may depend on the previous
1690 routing that produced that child. Some complicated redirection strategies
1691 went wrong when messages had multiple recipients, and made Exim's
1692 behaviour dependent on the order in which the addresses were given.
1694 I have moved the duplicate checking until after the routing is complete.
1695 Exim scans the addresses that are assigned to local and remote
1696 transports, and removes any duplicates. This means that more work will be
1697 done, as duplicates will always all be routed, but duplicates are
1698 presumably rare, so I don't expect this is of any significance.
1700 For deliveries to pipes, files, and autoreplies, the duplicate checking
1701 still happens during the routing process, since they are not going to be
1704 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1705 It corrects a timeout issue with spamd. This is Ian's comment: "The
1706 background is that sometimes spamd either never reads data from a
1707 connection it has accepted, or it never writes response data. The exiscan
1708 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1709 blindly assumes that writes won't block so it may never time out."
1711 PH/39 Allow G after quota size as well as K and M.
1713 PH/40 The value set for $authenticated_id in an authenticator may not contain
1714 binary zeroes or newlines because the value is written to log lines and
1715 to spool files. There was no check on this. Now the value is run through
1716 the string_printing() function so that such characters are converted to
1717 printable escape sequences.
1719 PH/41 $message_linecount is a new variable that contains the total number of
1720 lines in the message. Compare $body_linecount, which is the count for the
1723 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1724 bounce and delay warning messages, except in certain special cases, which
1727 (a) An SMTP error message from a remote host;
1728 (b) A message specified in a :fail: redirection;
1729 (c) A message specified in a "fail" command in a system filter;
1730 (d) A message specified in a FAIL return from the queryprogram router;
1731 (e) A message specified by the cannot_route_message router option.
1733 In these cases only, Exim does include the error details in bounce and
1734 warning messages. There are also a few cases where bland messages such
1735 as "unrouteable address" or "local delivery error" are given.
1737 PH/43 $value is now also set for the "else" part of a ${run expansion.
1739 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1740 being worked on, but at least Exim now implements the latest version to
1743 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1744 process to complete was treated as a delivery failure, a timeout while
1745 writing the message to the pipe was logged, but erroneously treated as a
1746 successful delivery. Such timeouts include transport filter timeouts. For
1747 consistency with the overall process timeout, these timeouts are now
1748 treated as errors, giving rise to delivery failures by default. However,
1749 there is now a new Boolean option for the pipe transport called
1750 timeout_defer, which, if set TRUE, converts the failures into defers for
1751 both kinds of timeout. A transport filter timeout is now identified in
1754 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1755 systems where "make" and "gmake" are different, calling "gmake" at top
1756 level broke things. I've arranged for the value of $(MAKE) to be passed
1757 from the Makefile to this script so that it can call the same version of
1761 A note about Exim versions 4.44 and 4.50
1762 ----------------------------------------
1764 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1765 changes of various kinds. As a consequence, a big documentation update was
1766 needed. This delayed the release for rather longer than seemed good, especially
1767 in the light of a couple of (minor) security issues. Therefore, the changes
1768 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1769 release. So 4.44 and 4.50 are in effect two different branches that both start
1772 I have left the 4.50 change log unchanged; it contains all the changes since
1773 4.43. The change log for 4.44 is below; many of its items are identical to
1774 those for 4.50. This seems to be the most sensible way to preserve the
1775 historical information.
1781 1. Minor wording change to the doc/README.SIEVE file.
1783 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1784 computation of the current number of files was incorrect.
1786 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1787 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1790 4. Give more explanation in the error message when the command for a transport
1791 filter fails to execute.
1793 5. There are several places where Exim runs a non-Exim command in a
1794 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1795 was being done only for the command run by the queryprogram router. It is
1796 now done for all such subprocesses. The other cases are: ${run, transport
1797 filters, and the commands run by the lmtp and pipe transports.
1799 6. Added CONFIGURE_GROUP build-time option.
1801 7. Some older OS have a limit of 256 on the maximum number of file
1802 descriptors. Exim was using setrlimit() to set 1000 as a large value
1803 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1804 systems. I've change it so that if it can't get 1000, it tries for 256.
1806 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1807 was an oversight, and furthermore, ever since the addition of extra
1808 controls (e.g. 4.43/32), the checks on when to allow different forms of
1809 "control" were broken. There should now be diagnostics for all cases when a
1810 control that does not make sense is encountered.
1812 9. Added the /retain_sender option to "control=submission".
1814 10. $recipients is now available in the predata ACL (oversight).
1816 11. Tidy the search cache before the fork to do a delivery from a message
1817 received from the command line. Otherwise the child will trigger a lookup
1818 failure and thereby defer the delivery if it tries to use (for example) a
1819 cached ldap connection that the parent has called unbind on.
1821 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1822 of $address_data from the recipient verification was clobbered by the
1823 sender verification.
1825 13. The value of address_data from a sender verification is now available in
1826 $sender_address_data in subsequent conditions in the ACL statement.
1828 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1830 15. Added a new option "connect=<time>" to callout options, to set a different
1833 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1834 was its contents. (It was OK if the option was not defined at all.)
1836 17. A "Completed" log line is now written for messages that are removed from
1837 the spool by the -Mrm option.
1839 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1840 information about exactly what failed.
1842 19. Added -dd to debug only the daemon process.
1844 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1845 handles timeouts, both on the server side and network timeouts. Renamed the
1846 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1848 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1849 It is now set to "smtps".
1851 22. $host_address is now set to the target address during the checking of
1852 ignore_target_hosts.
1854 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1855 being passed; this would have caused $sender_host_name to have been used if
1856 matching the list had actually called for a host name (not very likely,
1857 since this list is usually IP addresses). A host name is now passed as
1860 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1861 code that specifies a non-restarting handler (typically sigaction() in
1862 modern systems) in an attempt to fix a rare and obscure crash bug.
1864 25. Narrowed the window for a race in the daemon that could cause it to ignore
1865 SIGCHLD signals. This is not a major problem, because they are used only to
1866 wake it up if nothing else does.
1868 26. A malformed maildirsize file could cause Exim to calculate negative values
1869 for the mailbox size or file count. Odd effects could occur as a result.
1870 The maildirsize information is now recalculated if the size or filecount
1873 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1874 support for a long time. Removed HAVE_SYS_VFS_H.
1876 28. Installed the latest version of exipick from John Jetmore.
1878 29. In an address list, if the pattern was not a regular expression, an empty
1879 subject address (from a bounce message) matched only if the pattern was an
1880 empty string. Non-empty patterns were not even tested. This was the wrong
1881 because it is perfectly reasonable to use an empty address as part of a
1882 database query. An empty address is now tested by patterns that are
1883 lookups. However, all the other forms of pattern expect the subject to
1884 contain a local part and a domain, and therefore, for them, an empty
1885 address still always fails if the pattern is not itself empty.
1887 30. Exim went into a mad DNS loop when attempting to do a callout where the
1888 host was specified on an smtp transport, and looking it up yielded more
1889 than one IP address.
1891 31. Re-factored the code for checking spool and log partition space into a
1892 function that finds that data and another that does the check. The former
1893 is then used to implement four new variables: $spool_space, $log_space,
1894 $spool_inodes, and $log_inodes.
1896 32. The RFC2047 encoding function was originally intended for short strings
1897 such as real names; it was not keeping to the 75-character limit for
1898 encoded words that the RFC imposes. It now respects the limit, and
1899 generates multiple encoded words if necessary. To be on the safe side, I
1900 have increased the buffer size for the ${rfc2047: expansion operator from
1903 33. It is now permitted to omit both strings after an "if" condition; if the
1904 condition is true, the result is "true". As before, when the second string
1905 is omitted, a false condition yields an empty string. This makes it less
1906 cumbersome to write custom ACL and router conditions.
1908 34. Failure to deliver a bounce message always caused it to be frozen, even if
1909 there was an errors_to setting on the router. The errors_to setting is now
1912 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1913 canonical form (fully expanded) before being placed in
1914 $sender_host_address.
1916 36. The table in the code that translates DNS record types into text (T_A to
1917 "A" for instance) was missing entries for NS and CNAME. It is just possible
1918 that this could have caused confusion if both these types were looked up
1919 for the same domain, because the text type is used as part of Exim's
1920 per-process caching. But the chance of anyone hitting this buglet seems
1923 37. The dnsdb lookup has been extended in a number of ways.
1925 (1) There is a new type, "zns", which walks up the domain tree until it
1926 finds some nameserver records. It should be used with care.
1928 (2) There is a new type, "mxh", which is like "mx" except that it returns
1929 just the host names, not the priorities.
1931 (3) It is now possible to give a list of domains (or IP addresses) to be
1932 looked up. The behaviour when one of the lookups defers can be
1933 controlled by a keyword.
1935 (4) It is now possible to specify the separator character for use when
1936 multiple records are returned.
1938 38. The dnslists ACL condition has been extended: it is now possible to supply
1939 a list of IP addresses and/or domains to be looked up in a particular DNS
1942 39. Added log_selector=+queue_time_overall.
1944 40. When running the queue in the test harness, wait just a tad after forking a
1945 delivery process, to get repeatability of debugging output.
1947 41. Include certificate and key file names in error message when GnuTLS fails
1948 to set them up, because the GnuTLS error message doesn't include the name
1949 of the failing file when there is a problem reading it.
1951 42. Allow both -bf and -bF in the same test run.
1953 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1955 44. The "Exiscan patch" is now merged into the mainline Exim source.
1957 45. Sometimes the final signoff response after QUIT could fail to get
1958 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1959 < 0 before doing a fflush(). This bug looks as though it goes back to the
1960 introduction of TLS in release 3.20, but "sometimes" must have been rare
1961 because the tests only now provoked it.
1963 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1964 (this can affect the format of dates).
1966 47. exim_tidydb, when checking for the continued existence of a message for
1967 which it has found a message-specific retry record, was not finding
1968 messages that were in split spool directories. Consequently, it was
1969 deleting retry records that should have stayed in existence.
1971 48. Steve fixed some bugs in eximstats.
1973 49. The SPA authentication driver was not abandoning authentication and moving
1974 on to the next authenticator when an expansion was forced to fail,
1975 contradicting the general specification for all authenticators. Instead it
1976 was generating a temporary error. It now behaves as specified.
1978 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1979 (the order specifies the preference for clients). The order is now AES256,
1980 AES128, 3DES, ARCFOUR128.
1982 51. Small patch to Sieve code - explicitly set From: when generating an
1985 52. Exim crashed if a remote delivery caused a very long error message to be
1986 recorded - for instance if somebody sent an entire SpamAssassin report back
1987 as a large number of 550 error lines. This bug was coincidentally fixed by
1988 increasing the size of one of Exim's internal buffers (big_buffer) that
1989 happened as part of the Exiscan merge. However, to be on the safe side, I
1990 have made the code more robust (and fixed the comments that describe what
1993 53. Now that there can be additional text after "Completed" in log lines (if
1994 the queue_time_overall log selector is set), a one-byte patch to exigrep
1995 was needed to allow it to recognize "Completed" as not the last thing in
1998 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1999 patch that reportedly fixes this has been added. I am not expert enough to
2000 create a test for it. This is what the patch creator wrote:
2002 "I found a little strange behaviour of ldap code when working with
2003 Windows 2003 AD Domain, where users was placed in more than one
2004 Organization Units. When I tried to give exim partial DN, the exit code
2005 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2006 But simultaneously result of request was absolutely normal ldap result,
2007 so I produce this patch..."
2009 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2010 REFERENCE, so I have modified the code to exclude the patch when that macro
2013 55. Some experimental protocols are using DNS PTR records for new purposes. The
2014 keys for these records are domain names, not reversed IP addresses. The
2015 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2016 leaves it alone. Component reversal etc. now happens only for IP addresses.
2019 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2021 57. Double the size of the debug message buffer (to 2048) so that more of very
2022 long debug lines gets shown.
2024 58. The exicyclog utility now does better if the number of log files to keep
2025 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2027 59. Two changes related to the smtp_active_hostname option:
2029 (1) $smtp_active_hostname is now available as a variable.
2030 (2) The default for smtp_banner uses $smtp_active_hostname instead
2031 of $primary_hostname.
2033 60. The host_aton() function is supposed to be passed a string that is known
2034 to be a valid IP address. However, in the case of IPv6 addresses, it was
2035 not checking this. This is a hostage to fortune. Exim now panics and dies
2036 if the condition is not met. A case was found where this could be provoked
2037 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2038 components; fortuitously, this particular loophole had already been fixed
2039 by change 4.50/55 above.
2041 If there are any other similar loopholes, the new check in host_aton()
2042 itself should stop them being exploited. The report I received stated that
2043 data on the command line could provoke the exploit when Exim was running as
2044 exim, but did not say which command line option was involved. All I could
2045 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2046 running as the user.
2049 61. There was a buffer overflow vulnerability in the SPA authentication code
2050 (which came originally from the Samba project). I have added a test to the
2051 spa_base64_to_bits() function which I hope fixes it.
2054 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2055 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2057 63. The daemon start-up calls getloadavg() while still root for those OS that
2058 need the first call to be done as root, but it missed one case: when
2059 deliver_queue_load_max is set with deliver_drop_privilege. This is
2060 necessary for the benefit of the queue runner, because there is no re-exec
2061 when deliver_drop_privilege is set.
2063 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2064 This has been fixed.
2066 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2067 was in use, was not putting the data itself into the right store pool;
2068 consequently, it could be overwritten for a subsequent message in the same
2069 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2072 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2074 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2075 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2076 the function were treating the return as a boolean value, which happened to
2077 work because 0=false and not-0=true, but is not correct code.
2079 68. The host_aton() function was not handling scoped IPv6 addresses (those
2080 with, for example, "%eth0" on the end) correctly.
2082 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2083 negated items (that is, ~something) in unsigned ints. Some compilers
2084 apparently mutter when there is no cast.
2086 70. If an address verification called from an ACL failed, and did not produce a
2087 user-specific message (i.e. there was only a "system" message), nothing was
2088 put in $acl_verify_message. In this situation, it now puts the system
2091 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2092 session; change 4.31/43 added the unwanted input to the log line - except
2093 that it did not do this in the start of session case. It now does.
2095 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2096 This is wrong and can cause the other end to generate a synchronization
2097 error if it is another Exim or anything else that does the synchronization
2098 check. A QUIT command is no longer sent after a timeout.
2100 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2101 during host lookups.
2103 74. The defer_ok option of callout verification was not working if it was used
2104 when verifying addresses in header lines, that is, for this case:
2106 verify = header_sender/callout=defer_ok
2108 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2109 those file descriptors could be used for SMTP connections. If anything
2110 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2111 could be sent to the SMTP client, causing chaos. The daemon now opens
2112 stdin, stdout, and stderr to /dev/null when it puts itself into the
2115 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2116 log by default. The user can override this with suitable Perl magic.
2118 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2119 the log message when discard triggers, was not working for the DATA ACL or
2120 for the non-SMTP ACL.
2122 78. Error message wording change in sieve.c.
2124 79. If smtp_accept_max_per_host was set, the number of connections could be
2125 restricted to fewer than expected, because the daemon was trying to set up
2126 a new connection before checking whether the processes handling previous
2127 connections had finished. The check for completed processes is now done
2128 earlier. On busy systems, this bug wouldn't be noticed because something
2129 else would have woken the daemon, and it would have reaped the completed
2132 80. If a message was submitted locally by a user whose login name contained one
2133 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2134 It caused a spool format error. I have fixed the spool reading code. A
2135 related problem was that the "from" clause in the Received: line became
2136 illegal because of the space(s). It is now covered by ${quote_local_part.
2138 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2141 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2143 83. Patch from Sieve maintainer to fix unterminated string problem in
2144 "vacation" handling.
2146 84. Some minor changes to the Linux configuration files to help with other
2147 OS variants using glibc.
2149 85. One more patch for Sieve to update vacation handling to latest spec.
2152 ----------------------------------------------------
2153 See the note above about the 4.44 and 4.50 releases.
2154 ----------------------------------------------------
2160 1. Change 4.43/35 introduced a bug that caused file counts to be
2161 incorrectly computed when quota_filecount was set in an appendfile
2164 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2165 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2168 3. Give more explanation in the error message when the command for a transport
2169 filter fails to execute.
2171 4. There are several places where Exim runs a non-Exim command in a
2172 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2173 was being done only for the command run by the queryprogram router. It is
2174 now done for all such subprocesses. The other cases are: ${run, transport
2175 filters, and the commands run by the lmtp and pipe transports.
2177 5. Some older OS have a limit of 256 on the maximum number of file
2178 descriptors. Exim was using setrlimit() to set 1000 as a large value
2179 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2180 systems. I've change it so that if it can't get 1000, it tries for 256.
2182 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2183 was an oversight, and furthermore, ever since the addition of extra
2184 controls (e.g. 4.43/32), the checks on when to allow different forms of
2185 "control" were broken. There should now be diagnostics for all cases when a
2186 control that does not make sense is encountered.
2188 7. $recipients is now available in the predata ACL (oversight).
2190 8. Tidy the search cache before the fork to do a delivery from a message
2191 received from the command line. Otherwise the child will trigger a lookup
2192 failure and thereby defer the delivery if it tries to use (for example) a
2193 cached ldap connection that the parent has called unbind on.
2195 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2196 of $address_data from the recipient verification was clobbered by the
2197 sender verification.
2199 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2200 was its contents. (It was OK if the option was not defined at all.)
2202 11. A "Completed" log line is now written for messages that are removed from
2203 the spool by the -Mrm option.
2205 12. $host_address is now set to the target address during the checking of
2206 ignore_target_hosts.
2208 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2209 being passed; this would have caused $sender_host_name to have been used if
2210 matching the list had actually called for a host name (not very likely,
2211 since this list is usually IP addresses). A host name is now passed as
2214 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2215 code that specifies a non-restarting handler (typically sigaction() in
2216 modern systems) in an attempt to fix a rare and obscure crash bug.
2218 15. Narrowed the window for a race in the daemon that could cause it to ignore
2219 SIGCHLD signals. This is not a major problem, because they are used only to
2220 wake it up if nothing else does.
2222 16. A malformed maildirsize file could cause Exim to calculate negative values
2223 for the mailbox size or file count. Odd effects could occur as a result.
2224 The maildirsize information is now recalculated if the size or filecount
2227 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2228 support for a long time. Removed HAVE_SYS_VFS_H.
2230 18. Updated exipick to current release from John Jetmore.
2232 19. Allow an empty sender to be matched against a lookup in an address list.
2233 Previously the only cases considered were a regular expression, or an
2236 20. Exim went into a mad DNS lookup loop when doing a callout where the
2237 host was specified on the transport, if the DNS lookup yielded more than
2240 21. The RFC2047 encoding function was originally intended for short strings
2241 such as real names; it was not keeping to the 75-character limit for
2242 encoded words that the RFC imposes. It now respects the limit, and
2243 generates multiple encoded words if necessary. To be on the safe side, I
2244 have increased the buffer size for the ${rfc2047: expansion operator from
2247 22. Failure to deliver a bounce message always caused it to be frozen, even if
2248 there was an errors_to setting on the router. The errors_to setting is now
2251 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2252 canonical form (fully expanded) before being placed in
2253 $sender_host_address.
2255 24. Updated eximstats to version 1.33
2257 25. Include certificate and key file names in error message when GnuTLS fails
2258 to set them up, because the GnuTLS error message doesn't include the name
2259 of the failing file when there is a problem reading it.
2261 26. Expand error message when OpenSSL has problems setting up cert/key files.
2264 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2265 (this can affect the format of dates).
2267 28. exim_tidydb, when checking for the continued existence of a message for
2268 which it has found a message-specific retry record, was not finding
2269 messages that were in split spool directories. Consequently, it was
2270 deleting retry records that should have stayed in existence.
2272 29. eximstats updated to version 1.35
2273 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2274 1.35 - bugfix such that pie charts by volume are generated correctly
2276 30. The SPA authentication driver was not abandoning authentication and moving
2277 on to the next authenticator when an expansion was forced to fail,
2278 contradicting the general specification for all authenticators. Instead it
2279 was generating a temporary error. It now behaves as specified.
2281 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2282 (the order specifies the preference for clients). The order is now AES256,
2283 AES128, 3DES, ARCFOUR128.
2285 31. Small patch to Sieve code - explicitly set From: when generating an
2288 32. Exim crashed if a remote delivery caused a very long error message to be
2289 recorded - for instance if somebody sent an entire SpamAssassin report back
2290 as a large number of 550 error lines. This bug was coincidentally fixed by
2291 increasing the size of one of Exim's internal buffers (big_buffer) that
2292 happened as part of the Exiscan merge. However, to be on the safe side, I
2293 have made the code more robust (and fixed the comments that describe what
2296 33. Some experimental protocols are using DNS PTR records for new purposes. The
2297 keys for these records are domain names, not reversed IP addresses. The
2298 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2299 leaves it alone. Component reversal etc. now happens only for IP addresses.
2302 34. The host_aton() function is supposed to be passed a string that is known
2303 to be a valid IP address. However, in the case of IPv6 addresses, it was
2304 not checking this. This is a hostage to fortune. Exim now panics and dies
2305 if the condition is not met. A case was found where this could be provoked
2306 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2307 components; fortuitously, this particular loophole had already been fixed
2308 by change 4.50/55 or 4.44/33 above.
2310 If there are any other similar loopholes, the new check in host_aton()
2311 itself should stop them being exploited. The report I received stated that
2312 data on the command line could provoke the exploit when Exim was running as
2313 exim, but did not say which command line option was involved. All I could
2314 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2315 running as the user.
2318 35. There was a buffer overflow vulnerability in the SPA authentication code
2319 (which came originally from the Samba project). I have added a test to the
2320 spa_base64_to_bits() function which I hope fixes it.
2323 36. The daemon start-up calls getloadavg() while still root for those OS that
2324 need the first call to be done as root, but it missed one case: when
2325 deliver_queue_load_max is set with deliver_drop_privilege. This is
2326 necessary for the benefit of the queue runner, because there is no re-exec
2327 when deliver_drop_privilege is set.
2329 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2330 was in use, was not putting the data itself into the right store pool;
2331 consequently, it could be overwritten for a subsequent message in the same
2332 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2335 38. Sometimes the final signoff response after QUIT could fail to get
2336 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2337 < 0 before doing a fflush(). This bug looks as though it goes back to the
2338 introduction of TLS in release 3.20, but "sometimes" must have been rare
2339 because the tests only now provoked it.
2345 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2346 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2347 Now it returns an integer. A number of calls were still expecting a T/F
2348 return. Fortuitously, in all cases, the tests worked in OK situations,
2349 which is the norm. However, things would have gone wrong on any write
2350 failures on the smtp file descriptor. This function is used when sending
2351 messages over SMTP and also when doing verify callouts.
2353 2. When Exim is called to do synchronous delivery of a locally submitted
2354 message (the -odf or -odi options), it no longer closes stderr before doing
2357 3. Implemented the mua_wrapper option.
2359 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2361 5. Implemented the functions header_remove(), header_testname(),
2362 header_add_at_position(), and receive_remove_recipient(), and exported them
2365 6. If an ACL "warn" statement specified the addition of headers, Exim already
2366 inserted X-ACL-Warn: at the start if there was no header name. However, it
2367 was not making this test for the second and subsequent header lines if
2368 there were newlines in the string. This meant that an invalid header could
2369 be inserted if Exim was badly configured.
2371 7. Allow an ACL "warn" statement to add header lines at the start or after all
2372 the Received: headers, as well as at the end.
2374 8. Added the rcpt_4xx retry error code.
2376 9. Added postmaster_mailfrom=xxx to callout verification option.
2378 10. Added mailfrom=xxxx to the callout verification option, for verify=
2381 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2382 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2384 12. Inserted some casts to stop certain compilers warning when using pointer
2385 differences as field lengths or precisions in printf-type calls (mostly
2386 affecting debugging statements).
2388 13. Added optional readline() support for -be (dynamically loaded).
2390 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2391 same clock tick as a message's arrival, so that its received time was the
2392 same as the "first fail" time on the retry record, and that message
2393 remained on the queue past the ultimate address timeout, every queue runner
2394 would try a delivery (because it was past the ultimate address timeout) but
2395 after another failure, the ultimate address timeout, which should have then
2396 bounced the address, did not kick in. This was a "< instead of <=" error;
2397 in most cases the first failure would have been in the next clock tick
2398 after the received time, and all would be well.
2400 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2401 being recognized when the domain list was tested by the match_domain
2402 condition in an expansion string.
2404 16. Added the ${str2b64: operator.
2406 17. Exim was always calling setrlimit() to set a large limit for the number of
2407 processes, without checking whether the existing limit was already
2408 adequate. (It did check for the limit on file descriptors.) Furthermore,
2409 errors from getrlimit() and setrlimit() were being ignored. Now they are
2410 logged to the main and panic logs, but Exim does carry on, to try to do its
2411 job under whatever limits there are.
2413 18. Imported PCRE 5.0.
2415 19. Trivial typo in log message " temporarily refused connection" (the leading
2418 20. If the log selector return_path_on_delivery was set and an address was
2419 redirected to /dev/null, the delivery process crashed because it assumed
2420 that a return path would always be set for a "successful" delivery. In this
2421 case, the whole delivery is bypassed as an optimization, and therefore no
2424 21. Internal re-arrangement: the function for sending a challenge and reading
2425 a response while authentication was assuming a zero-terminated challenge
2426 string. It's now changed to take a pointer and a length, to allow for
2427 binary data in such strings.
2429 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2431 23. Exim was not respecting finduser_retries when seeking the login of the
2432 uid under which it was called; it was always trying 10 times. (The default
2433 setting of finduser_retries is zero.) Also, it was sleeping after the final
2434 failure, which is pointless.
2436 24. Implemented tls_on_connect_ports.
2438 25. Implemented acl_smtp_predata.
2440 26. If the domain in control=submission is set empty, Exim assumes that the
2441 authenticated id is a complete email address when it generates From: or
2442 Sender: header lines.
2444 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2445 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2446 chown and chgrp in /bin and hostname in /usr/bin.
2448 28. Exim was keeping the "process log" file open after each use, just as it
2449 does for the main log. This opens the possibility of it remaining open for
2450 long periods when the USR1 signal hits a daemon. Occasional processlog
2451 errors were reported, that could have been caused by this. Anyway, it seems
2452 much more sensible not to leave this file open at all, so that is what now
2455 29. The long-running daemon process does not normally write to the log once it
2456 has entered its main loop, and it closes the log before doing so. This is
2457 so that log files can straightforwardly be renamed and moved. However,
2458 there are a couple of unusual error situations where the daemon does write
2459 log entries, and I had neglected to close the log afterwards.
2461 30. The text of an SMTP error response that was received during a remote
2462 delivery was being truncated at 512 bytes. This is too short for some of
2463 the long messages that one sometimes sees. I've increased the limit to
2466 31. It is now possible to make retry rules that apply only when a message has a
2467 specific sender, in particular, an empty sender.
2469 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2470 it possible to be selective about when SMTP synchronization is enforced.
2472 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2474 32. Implemented hosts_connection_nolog.
2476 33. Added an ACL for QUIT.
2478 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2481 35. Added mailbox_size and mailbox_filecount to appendfile.
2483 36. Added control = no_multiline_responses to ACLs.
2485 37. There was a bug in the logic of the code that waits for the clock to tick
2486 in the case where the clock went backwards by a substantial amount such
2487 that the microsecond fraction of "now" was more than the microsecond
2488 fraction of "then" (but the whole seconds number was less).
2490 38. Added support for the libradius Radius client library this is found on
2491 FreeBSD (previously only the radiusclient library was supported).
2497 1. When certain lookups returned multiple values in the form name=value, the
2498 quoting of the values was not always being done properly. Specifically:
2499 (a) If the value started with a double quote, but contained no whitespace,
2501 (b) If the value contained whitespace other than a space character (i.e.
2502 tabs or newlines or carriage returns) it was not quoted.
2503 This fix has been applied to the mysql and pgsql lookups by writing a
2504 separate quoting function and calling it from the lookup code. The fix
2505 should probably also be applied to nisplus, ibase and oracle lookups, but
2506 since I cannot test any of those, I have not disturbed their existing code.
2508 2. A hit in the callout cache for a specific address caused a log line with no
2509 reason for rejecting RCPT. Now it says "Previous (cached) callout
2510 verification failure".
2512 3. There was an off-by-one bug in the queryprogram router. An over-long
2513 return line was truncated at 256 instead of 255 characters, thereby
2514 overflowing its buffer with the terminating zero. As well as fixing this, I
2515 have increased the buffer size to 1024 (and made a note to document this).
2517 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2518 when Exim is waiting for an SMTP response from a remote server, Exim
2519 restarts its select() call on the socket, thereby resetting its timeout.
2520 This is not a problem when such interrupts are rare. Somebody set up a cron
2521 job to run exiwhat every 2 minutes, which is less than the normal select()
2522 timeout (5 or 10 minutes). This meant that the select() timeout never
2523 kicked in because it was always reset. I have fixed this by comparing the
2524 time when an interrupt arrives with the time at the start of the first call
2525 to select(). If more time than the timeout has elapsed, the interrupt is
2526 treated as a timeout.
2528 5. Some internal re-factoring in preparation for the addition of Sieve
2529 extensions (by MH). In particular, the "personal" test is moved to a
2530 separate function, and given an option for scanning Cc: and Bcc: (which is
2531 not set for Exim filters).
2533 6. When Exim created an email address using the login of the caller as the
2534 local part (e.g. when creating a From: or Sender: header line), it was not
2535 quoting the local part when it contained special characters such as @.
2537 7. Installed new OpenBSD configuration files.
2539 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2540 try to make them clearer.
2542 9. Callout options, other than the timeout value, were being ignored when
2543 verifying sender addresses in header lines. For example, when using
2545 verify = header_sender/callout=no_cache
2547 the cache was (incorrectly) being used.
2549 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2550 only the Cygwin environment.
2552 11. When return_path_on_delivery was set as a log selector, if different remote
2553 addresses in the same message used different return paths and parallel
2554 remote delivery occurred, the wrong values would sometimes be logged.
2555 (Whenever a remote delivery process finished, the return path value from
2556 the most recently started remote delivery process was logged.)
2558 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2559 lines when AUTH and/or TLS are in use. This is the "received protocol"
2560 field. Exim used to use "asmtp" for authenticated SMTP, without any
2561 indication (in the protocol name) for TLS use. Now it follows the RFC and
2562 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2563 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2564 names appear in log lines as well as in Received: header lines.
2566 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2567 extensions, and comparison tests, and to fix some bugs.
2569 14. Changes to the "personal" filter test:
2571 (1) The test was buggy in that it was just doing the equivalent of
2572 "contains" tests on header lines. For example, if a user's address was
2573 anne@some.where, the "personal" test would incorrectly be true for
2575 To: susanne@some.where
2577 This test is now done by extracting each address from the header in turn,
2578 and checking the entire address. Other tests that are part of "personal"
2579 are now done using regular expressions (for example, to check local parts
2580 of addresses in From: header lines).
2582 (2) The list of non-personal local parts in From: addresses has been
2583 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2584 taken from the Sieve specification recommendations.
2586 (3) If the message contains any header line starting with "List-" it is
2587 treated as non-personal.
2589 (4) The test for "circular" in the Subject: header line has been removed
2590 because it now seems ill-conceived.
2592 15. Minor typos in src/EDITME comments corrected.
2594 16. Installed latest exipick from John Jetmore.
2596 17. If headers_add on a router specified a text string that was too long for
2597 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2598 of string_sprintf() is now avoided.
2600 18. $message_body_size was not set (it was always zero) when running the DATA
2601 ACL and the local_scan() function.
2603 19. For the "mail" command in an Exim filter, no default was being set for
2604 the once_repeat time, causing a random time value to be used if "once" was
2605 specified. (If the value happened to be <= 0, no repeat happened.) The
2606 default is now 0s, meaning "never repeat". The "vacation" command was OK
2607 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2608 (I found it when inspecting the code).
2610 20. There is now an overall timeout for performing a callout verification. It
2611 defaults to 4 times the callout timeout, which applies to individual SMTP
2612 commands during the callout. The overall timeout applies when there is more
2613 than one host that can be tried. The timeout is checked before trying the
2614 next host. This prevents very long delays if there are a large number of
2615 hosts and all are timing out (e.g. when the network connections are timing
2616 out). The value of the overall timeout can be changed by specifying an
2617 additional sub-option for "callout", called "maxwait". For example:
2619 verify = sender/callout=5s,maxwait=20s
2621 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2622 to the end before writing, but this should make it even safer).
2624 22. Exim was forgetting that it had advertised PIPELINING for the second and
2625 subsequent messages on an SMTP connection. It was also not resetting its
2626 memory on STARTTLS and an internal HELO.
2628 23. When Exim logs an SMTP synchronization error within a session, it now
2629 records whether PIPELINING has been advertised or not.
2631 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2632 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2633 rather than long int.
2635 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2637 26. Added the never_mail option to autoreply.
2643 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2644 crash if the getsockname() call failed; this can happen if a connection is
2645 closed very soon after it is established. The problem was simply in the
2646 order in which certain operations were done, causing Exim to try to write
2647 to the SMTP stream before it had set up the file descriptor. The bug has
2648 been fixed by making things happen in the correct order.
2654 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2655 before the connection was closed, thus losing the rejection response.
2657 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2658 some early Solaris releases, but causes trouble in current releases where
2659 socklen_t is defined.
2661 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2664 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2667 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2668 that releasing the top of it at the end releases what was used for sub-
2669 expansions (unless the block got too big). However, discard this block if
2670 the first thing is a variable or header, so that we can use its block when
2671 it is dynamic (useful for very large $message_headers, for example).
2673 6. Lookups now cache *every* query, not just the most recent. A new, separate
2674 store pool is used for this. It can be recovered when all lookup caches are
2675 flushed. Lookups now release memory at the end of their result strings.
2676 This has involved some general refactoring of the lookup sources.
2678 7. Some code has been added to the store_xxx() functions to reduce the amount
2679 of flapping under certain conditions.
2681 8. log_incoming_interface used to affect only the <= reception log lines. Now
2682 it causes the local interface and port to be added to several more SMTP log
2683 lines, for example "SMTP connection from", and rejection lines.
2685 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2687 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2689 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2690 could be overwritten at the end of the current message (or the start of a
2691 new message if it was set in a HELO ACL). The value is now preserved for
2692 the duration of the SMTP connection.
2694 12. If a transport had a headers_rewrite setting, and a matching header line
2695 contained an unqualified address, that address was qualified, even if it
2696 did not match any rewriting rules. The underlying bug was that the values
2697 of the flags that permit the existence of unqualified sender and recipient
2698 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2699 non-local messages, and by -bnq for local messages) were not being
2700 preserved with the message after it was received.
2702 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2703 "next input=" as part of the text comprising the host identity instead of
2704 the correct text. The code was using the same buffer for two different
2705 strings. However, depending on which order the printing function evaluated
2706 its arguments, the bug did not always show up. Under Linux, for example, my
2707 test suite worked just fine.
2709 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2710 doesn't work with some older versions of Perl. It has been changed to "my",
2711 which in any case is probably the better facility to use.
2713 15. A really picky compiler found some instances of statements for creating
2714 error messages that either had too many or two few arguments for the format
2717 16. The size of the buffer for calls to the DNS resolver has been increased
2718 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2719 for addresses that have a lot of PTR records. This alleviates a problem; it
2720 does not fully solve it.
2722 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2723 buffer now truncates the list and logs the incident, which is the same
2724 action as happens when Exim is looking up a host name and its aliases.
2725 Previously in this situation something unpredictable would happen;
2726 sometimes it was "internal error: store_reset failed".
2728 18. If a server dropped the connection unexpectedly when an Exim client was
2729 using GnuTLS and trying to read a response, the client delivery process
2730 crashed while trying to generate an error log message.
2732 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2733 string, for example:
2735 warn message = H1: something\nH2: something
2737 the text was added as a single header line from Exim's point of view
2738 though it ended up OK in the delivered message. However, searching for the
2739 second and subsequent header lines using $h_h2: did not work. This has been
2740 fixed. Similarly, if a system filter added multiple headers in this way,
2741 the routers could not see them.
2743 20. Expanded the error message when iplsearch is called with an invalid key to
2744 suggest using net-iplsearch in a host list.
2746 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2747 ACLs are no longer actually imposed (and a message to that effect is
2750 22. If a "gecos" field in a passwd entry contained escaped characters, in
2751 particular, if it contained a \" sequence, Exim got it wrong when building
2752 a From: or a Sender: header from that name. A second bug also caused
2753 incorrect handling when an unquoted " was present following a character
2754 that needed quoting.
2756 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2757 was not being matched caselessly.
2759 24. Arranged for all hyphens in the exim.8 source to be escaped with
2762 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2763 properly. Recipient callout cache records were still being keyed to include
2764 the sender, even when use_sender was set false. This led to far more
2765 callouts that were necessary. The sender is no longer included in the key
2766 when use_sender is false.
2768 26. Added "control = submission" modifier to ACLs.
2770 27. Added the ${base62d: operator to decode base 62 numbers.
2772 28. dnsdb lookups can now access SRV records.
2774 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2775 the configuration file.
2777 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2778 (-v) mode. This makes the output for a verbose queue run more intelligible.
2780 31. Added a use_postmaster feature to recipient callouts.
2782 32. Added the $body_zerocount variable, containing the number of binary zero
2783 bytes in the message body.
2785 33. The time of last modification of the "new" subdirectory is now used as the
2786 "mailbox time last read" when there is a quota error for a maildir
2789 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2791 35. Added +ignore_unknown as a special item in host lists.
2793 36. Code for decoding IPv6 addresses in host lists is now included, even if
2794 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2795 address was recognized as an IP address, but was then not correctly decoded
2796 into binary, causing unexpected and incorrect effects when compared with
2803 1. Very minor rewording of debugging text in manualroute to say "list of
2804 hosts" instead of "hostlist".
2806 2. If verify=header_syntax was set, and a header line with an unqualified
2807 address (no domain) and a large number of spaces between the end of the
2808 name and the colon was received, the reception process suffered a buffer
2809 overflow, and (when I tested it) crashed. This was caused by some obsolete
2810 code that should have been removed. The fix is to remove it!
2812 3. When running in the test harness, delay a bit after writing a bounce
2813 message to get a bit more predictability in the log output.
2815 4. Added a call to search_tidyup() just before forking a reception process. In
2816 theory, someone could use a lookup in the expansion of smtp_accept_max_
2817 per_host which, without the tidyup, could leave open a database connection.
2819 5. Added the variables $recipient_data and $sender_data which get set from a
2820 lookup success in an ACL "recipients" or "senders" condition, or a router
2821 "senders" option, similar to $domain_data and $local_part_data.
2823 6. Moved the writing of debug_print from before to after the "senders" test
2826 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2827 problems for message scanning, either using a data ACL, or using
2828 local_scan() because the Received: header was not generated till after they
2829 were called (in order to set the time as the time of reception completion).
2830 I have revised the way this works. The header is now generated after the
2831 body is received, but before the ACL or local_scan() are called. After they
2832 are run, the timestamp in the header is updated.
2838 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2839 before starting a queue runner without re-exec. This happened only when
2840 deliver_drop_privilege was set or when the Exim user was set to root. The
2841 effect of the bug was that timeouts during subsequent deliveries caused
2842 crashes instead of being properly handled. The handler is now left at its
2843 default (and expected) setting.
2845 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2846 message, again when deliver_drop_privilege is set or Exim is run as root.
2847 The bug described in (1) was not present in this case, but the tidying up
2848 of the other signals was missing. I have made the two cases consistent.
2850 3. The ignore_target_hosts setting on a manualroute router was being ignored
2851 for hosts that were looked up using the /MX notation.
2853 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2856 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2857 operated on the sender address. After changing the $sender_address to <>
2858 for the sender address verify, Exim was re-instated it as the original
2859 (before rewriting) address, but remembering that it had rewritten it, so it
2860 wasn't rewriting it again. This bug also had the effect of breaking the
2861 sender address verification caching when the sender address was rewritten.
2863 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2864 This has been changed so that if the ip literal address matches
2865 ignore_target_hosts, the router declines.
2867 7. Added expansion conditions match_domain, match_address, and match_local_
2868 part (NOT match_host).
2870 8. The placeholder for the Received: header didn't have a length field set.
2872 9. Added code to Exim itself and to exim_lock to test for a specific race
2873 condition that could lead to file corruption when using MBX delivery. The
2874 issue is with the lockfile that is created in /tmp. If this file is removed
2875 after a process has opened it but before that process has acquired a lock,
2876 there is the potential for a second process to recreate the file and also
2877 acquire a lock. This could lead to two Exim processes writing to the file
2878 at the same time. The added code performs the same test as UW imapd; it
2879 checks after acquiring the lock that its file descriptor still refers to
2880 the same named file.
2882 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2883 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2886 11. Added the smtp_active_hostname option. If used, this will typically be made
2887 to depend on the incoming interface address. Because $interface_address is
2888 not set up until the daemon has forked a reception process, error responses
2889 that can happen earlier (such as "too many connections") no longer contain
2892 12. If an expansion in a condition on a "warn" statement fails because a lookup
2893 defers, the "warn" statement is abandoned, and the next ACL statement is
2894 processed. Previously this caused the whole ACL to be aborted.
2896 13. Added the iplsearch lookup type.
2898 14. Added ident_timeout as a log selector.
2900 15. Added tls_certificate_verified as a log selector.
2902 16. Added a global option tls_require_ciphers (compare the smtp transport
2903 option of the same name). This controls incoming TLS connections.
2905 17. I finally figured out how to make tls_require_ciphers do a similar thing
2906 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2907 before starting the TLS session.
2909 18. Tabs are now shown as \t in -bP output.
2911 19. If the log selector return_path_on_delivery was set, Exim crashed when
2912 bouncing a message because it had too many Received: header lines.
2914 20. If two routers both had headers_remove settings, and the first one included
2915 a superfluous trailing colon, the final name in the first list and the
2916 first name in the second list were incorrectly joined into one item (with a
2917 colon in the middle).
2923 1. Added -C and -D options to the exinext utility, mainly to make it easier
2924 to include in the automated testing, but these could be helpful when
2925 multiple configurations are in use.
2927 2. The exinext utility was not formatting the output nicely when there was
2928 an alternate port involved in the retry record key, nor when there was a
2929 message id as well (for retries that were specific to a specific message
2930 and a specific host). It was also confused by IPv6 addresses, because of
2931 the additional colons they contain. I have fixed the IPv4 problem, and
2932 patched it up to do a reasonable job for IPv6.
2934 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2935 delivery, the log line now contains "pipelined" if PIPELINING was used.
2937 4. An SMTP transport process used to panic and die if the bind() call to set
2938 an explicit outgoing interface failed. This has been changed; it is now
2939 treated in the same way as a connect() failure.
2941 5. A reference to $sender_host_name in the part of a conditional expansion
2942 that was being skipped was still causing a DNS lookup. This no longer
2945 6. The def: expansion condition was not recognizing references to header lines
2946 that used bh_ and bheader_.
2948 7. Added the _cache feature to named lists.
2950 8. The code for checking quota_filecount in the appendfile transport was
2951 allowing one more file than it should have been.
2953 9. For compatibility with Sendmail, the command line option
2961 and sets the incoming protocol and host name (for trusted callers). The
2962 host name and its colon can be omitted when only the protocol is to be set.
2963 Note the Exim already has two private options, -pd and -ps, that refer to
2964 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2965 "s", but I don't think that's a major issue.
2967 10. A number of refactoring changes to the code, none of which should affect
2970 (a) The number of logging options was getting close to filling up the
2971 32-bit word that was used as a bit map. I have split them into two classes:
2972 those that are passed in the argument to log_write(), and those that are
2973 only ever tested independently outside of that function. These are now in
2974 separate 32-bit words, so there is plenty of room for expansion again.
2975 There is no change in the user interface or the logging behaviour.
2977 (b) When building, for example, log lines, the code previously used a
2978 macro that called string_cat() twice, in order to add two strings. This is
2979 not really sufficiently general. Furthermore, there was one instance where
2980 it was actually wrong because one of the argument was used twice, and in
2981 one call a function was used. (As it happened, calling the function twice
2982 did not affect the overall behaviour.) The macro has been replaced by a
2983 function that can join an arbitrary number of extra strings onto a growing
2986 (c) The code for expansion conditions now uses a table and a binary chop
2987 instead of a serial search (which was left over from when there were very
2988 few conditions). Also, it now recognizes conditions like "pam" even when
2989 the relevant support is not compiled in: a suitably worded error message is
2990 given if an attempt is made to use such a condition.
2992 11. Added ${time_interval:xxxxx}.
2994 12. A bug was causing one of the ddress fields not to be passed back correctly
2995 from remote delivery subprocesses. The field in question was not being
2996 subsequently used, so this caused to problems in practice.
2998 13. Added new log selectors queue_time and deliver_time.
3000 14. Might have fixed a bug in maildirsizefile handling that threw up
3001 "unexpected character" debug warnings, and recalculated the data
3002 unnecessarily. In any case, I expanded the warning message to give more
3005 15. Added the message "Restricted characters in address" to the statements in
3006 the default ACL that block characters like @ and % in local parts.
3008 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3009 Three changes have been made:
3011 (a) There was a serious bug; a negative response to MAIL caused the whole
3012 recipient domain to be cached as invalid, thereby blocking all messages
3013 to all local parts at the same domain, from all senders. This bug has
3014 been fixed. The domain is no longer cached after a negative response to
3015 MAIL if the sender used is not empty.
3017 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3020 (c) A new callout option, "use_sender" has been added for people who want
3021 the modified behaviour.
3027 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3030 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3031 indeed breaks things for older releases.
3033 3. Added additional logging to the case where there is a problem reading data
3034 from a filter that is running in a subprocess using a pipe, in order to
3035 try to track down a specific problem.
3037 4. Testing facility fudge: when running in the test harness and attempting
3038 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3039 getting "No route to host". Convert this to a timeout.
3041 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3044 6. Some OS don't have socklen_t but use size_t instead. This affects the
3045 fifth argument of getsockopt() amongst other things. This is now
3046 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3047 can be set for individual OS. I have set it for SunOS5, OSF1, and
3048 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3049 some earlier ones do not.
3051 7. Change 4.30/15 was not doing the test caselessly.
3053 8. The standard form for an IPv6 address literal was being rejected by address
3054 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3055 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3056 this, as well as the form without the "IPv6" on the front (but only when
3057 address literals are enabled, of course).
3059 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3061 10. Exim crashed if a message with an empty sender address specified by -f
3062 encountered a router with an errors_to setting. This could be provoked only
3063 by a command such as
3067 where an empty string was supplied; "<>" did not hit this bug.
3069 11. Installed PCRE release 4.5.
3071 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3072 remained set. It is now erased.
3074 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3075 times from message ids (which are base 36 rather than the normal 62).
3077 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3078 were being counted as actual protocol errors, and logged if the log
3079 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3080 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3081 and DATA following a set of rejected RCPTs do not count as protocol errors.
3082 In other words, Exim assumes they were pipelined, though this may not
3083 actually be the case. Of course, in all cases the client gets an
3084 appropriate error code.
3086 15. If a lookup fails in an ACL condition, a message about the failure may
3087 be available; it is used if testing the ACL cannot continue, because most
3088 such messages specify what the cause of the deferral is. However, some
3089 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3090 that caused an old message to be retained and used if a later statement
3091 caused a defer, replacing the real cause of the deferral.
3093 16. If an IP address had so many PTR records that the DNS lookup buffer
3094 was not large enough to hold them, Exim could crash while trying to process
3095 the truncated data. It now detects and logs this case.
3097 17. Further to 4.21/58, another change has been made: if (and only if) the
3098 first line of a message (the first header line) ends with CRLF, a bare LF
3099 in a subsequent header line has a space inserted after it, so as not to
3100 terminate the header.
3102 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3103 unnecessarily, used atoi() instead of strtol(), and didn't check the
3104 termination when getting file sizes from file names by regex.
3106 19. Completely re-implemented the support for maildirsize files, in the light
3107 of a number of problems with the previous contributed implementation
3108 (4.30/29). In particular:
3110 . If the quota is zero, the maildirsize file is maintained, but no quota is
3113 . If the maildir directory does not exist, it is created before any attempt
3114 to write a maildirsize file.
3116 . The quota value in the file is just a cache; if the quota is changed in
3117 the transport, the new value overrides.
3119 . A regular expression is available for excluding directories from the
3122 20. The autoreply transport checks the characters in options that define the
3123 message's headers; it allows continued headers, but it was checking with
3124 isspace() after an embedded newline instead of explicitly looking for a
3127 21. If all the "regular" hosts to which an address was routed had passed their
3128 expiry times, and had not reached their retry times, the address was
3129 bounced, even if fallback hosts were defined. Now Exim should go on to try
3132 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3133 equivalent code in the SMTP transport. Some hosts send humungous responses
3134 to HELO/EHLO, more than 1024 it seems.
3136 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3137 gives compiler warnings in some environments. I've now done it "properly",
3140 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3141 (because of problems with the built-in one) was declared to return uschar *
3142 instead of char *, causing compiler failure.
3144 25. Fixed a file descriptor leak when processing alias/forward files.
3146 26. Fixed a minor format string issue in dbfn.c.
3148 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3150 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3151 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3154 29. When a sender address is verified, it is cached, to save repeating the test
3155 when there is more than one recipient in a message. However, when the
3156 verification involves a callout, it is possible for different callout
3157 options to be set for different recipients. It is too complicated to keep
3158 track of this in the cache, so now Exim always runs a verification when a
3159 callout is required, relying on the callout cache for the optimization.
3160 The overhead is duplication of the address routing, but this should not be
3163 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3164 to be verified with callout=postmaster, and the main callout worked but the
3165 postmaster check failed, the verification correctly failed. However, if a
3166 subsequent RCPT command asked for sender verification *without* the
3167 postmaster check, incorrect caching caused this verification also to fail,
3170 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3171 it was not caching the DNS options (qualify_single, search_parents) that
3172 were used when the lookup failed. A subsequent lookup with different
3173 options therefore always gave the same answer, though there were cases
3174 where it should not have. (Example: a "domains = !$mx_any" option on a
3175 dnslookup router: the "domains" option is always processed without any
3176 widening, but the router might have qualify_single set.) Now Exim uses the
3177 cached value only when the same options are set.
3179 32. Added John Jetmore's "exipick" utility to the distribution.
3181 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3182 than a timeout (e.g. a certificate is required, and is not provided), an
3183 Exim server now closes the connection immediately. Previously it waited for
3184 the client to close - but if the client is SSL, it seems that they each
3185 wait for each other, leading to a delay before one of them times out.
3187 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3188 maintained 0.8.x compatibility because I don't think many are using it, and
3189 it is clearly obsolete.
3191 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3194 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3195 client certificate was expired. A simple patch fixes this, though I don't
3196 understand the full logic of why the verify callback is called multiple
3199 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3200 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3201 which causes problems with some clients (such as the Certicom SSL Plus
3202 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3203 disables the coutermeasure allowing Eudora to connect."
3205 38. Exim was not checking that a write() to a log file succeeded. This could
3206 lead to Bad Things if a log got too big, in particular if it hit a file
3207 size limit. Exim now panics and dies if it cannot write to a log file, just
3208 as it does if it cannot open a log file.
3210 39. Modified OS/Makefile-Linux so that it now contains
3212 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3214 The two -D definitions ensure that Exim is compiled with large file
3215 support, which makes it possible to handle log files that are bigger than
3218 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3219 instance) a domain was checked against a named list that involved a lookup,
3220 causing $domain_data to be set, then another domain was checked against the
3221 same list, then the first domain was re-checked, the value of $domain_data
3222 after the final check could be wrong. In particular, if the second check
3223 failed, it could be set empty. This bug probably also applied to
3226 41. The strip_trailing_dot option was not being applied to the address given
3227 with the -f command-line option.
3229 42. The code for reading a message's header from the spool was incrementing
3230 $received_count, but never initializing it. This meant that the value was
3231 incorrect (doubled) while delivering a message in the same process in which
3232 it was received. In the most common configuration of Exim, this never
3233 happens - a fresh exec is done - but it can happen when
3234 deliver_drop_privilege is set.
3236 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3237 it now includes up to 150 characters of the unexpected data in the log
3240 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3241 and building data strings. The size of both of these buffers was 10 000
3242 bytes - far larger than anybody would *ever* want, thought I. Needless to
3243 say, somebody hit the limit. I have increased the maximum line length to
3244 20 000 and the maximum data length of concatenated lines to 100 000. I have
3245 also fixed two bugs, because there was no checking on these buffers. Tsk,
3246 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3247 buffer is too small.
3249 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3250 lsearch lookups. Now it does.
3252 46. When parsing a route_list item in a manualroute router, a fixed-length
3253 buffer was used for the list of hosts. I made this 1024 bytes long,
3254 thinking that nobody would ever have a list of hosts that long. Wrong.
3255 Somebody had a whole pile of complicated expansion conditions, and the
3256 string was silently truncated, leading to an expansion error. It turns out
3257 that it is easier to change to an unlimited length (owing to other changes
3258 that have happened since this code was originally written) than to build
3259 structure for giving a limitation error. The length of the item that
3260 expands into the list of hosts is now unlimited.
3262 47. The lsearch lookup could not handle data where the length of text line was
3263 more than 4095 characters. Such lines were truncated, leading to shortened
3264 data being returned. It should now handle lines of any length.
3266 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3267 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3270 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3271 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3272 no longer happens in comment lines. A list of replacements is now placed
3273 at the head of all of the source files, except those whose only change is
3274 to replace PERL_COMMAND in the very first #! line.
3276 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3277 messages on the queue, with a bottom-up merge sort, using code contributed
3278 by Michael Haardt. This should make operations like -bp somewhat faster on
3279 large queues. It won't affect queue runners, except when queue_run_in_order
3282 51. Installed eximstats 1.31 in the distribution.
3284 52. Added support for SRV lookups to the dnslookup router.
3286 53. If an ACL referred to $message_body or $message_body_end, the value was not
3287 reset for any messages that followed in the same SMTP session.
3289 54. The store-handling optimization for building very long strings was not
3290 differentiating between the different store pools. I don't think this
3291 actually made any difference in practice, but I've tidied it.
3293 55. While running the routers to verify a sender address, $sender_address
3294 was still set to the sender address. This is wrong, because when routing to
3295 send a bounce to the sender, it would be empty. Therefore, I have changed
3296 it so that, while verifying a sender address, $sender_address is set to <>.
3297 (There is no change to what happens when verifying a recipient address.)
3299 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3300 target A or AAAA records (if not already returned) without resetting the
3301 qualify_single or search_parents options of the DNS resolver. These are
3302 inappropriate in this case because the targets of MX and SRV records must
3303 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3304 target that, when qualified, matched something in the local domain. These
3305 two options are now turned off when doing these lookups.
3307 57. It seems that at least some releases of Reiserfs (which does not have the
3308 concept of a fixed number of inodes) returns zero and not -1 for the
3309 number of available inodes. This interacted badly with check_spool_inodes,
3310 which assumed that -1 was the "no such thing" setting. What I have done is
3311 to check that the total number of inodes is greater than zero before doing
3312 the test of how many are available.
3314 58. When a "warn" ACL statement has a log_message modifier, the message is
3315 remembered, and not repeated. This is to avoid a lot of repetition when a
3316 message has many recipients that cause the same warning to be written.
3317 Howewer, Exim was preserving the list of already written lines for an
3318 entire SMTP session, which doesn't seem right. The memory is now reset if a
3319 new message is started.
3321 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3322 debugging output unless log_rewrite was also set.
3324 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3325 of (int)(handle) when we know that handle contains (void *)(-1).
3327 61. The Exim daemon panic-logs an error return when it closes the incoming
3328 connection. However "connection reset by peer" seems to be common, and
3329 isn't really an error worthy of noting specially, so that particular error
3332 62. When Exim is trying to find all the local interfaces, it used to panic and
3333 die if the ioctl to get the interface flags failed. However, it seems that
3334 on at least one OS (Solaris 9) it is possible to have an interface that is
3335 included in the list of interfaces, but for which you get a failure error
3336 for this call. This happens when the interface is not "plumbed" into a
3337 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3338 failure of the "get flags" call assumes that the interface is down.
3340 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3341 makes life easier for people who are doing arithmetic on fields extracted
3342 from dates, where you often get leading zeros that should not be
3343 interpreted as octal.
3345 64. Added qualify_domain to the redirect router, to override the global
3348 65. If a pathologically long header line contained very many addresses (the
3349 report of this problem mentioned 10 000) and each of them was rewritten,
3350 Exim could use up a very large amount of memory. (It kept on making new
3351 copies of the header line as it rewrote, and never released the old ones.)
3352 At the expense of a bit more processing, the header rewriting function has
3353 been changed so that it no longer eats memory in this way.
3355 66. The generation of the Received: header has been moved from the time that a
3356 message starts to be received, to the time that it finishes. The timestamp
3357 in the Received: header should now be very close to that of the <= log
3358 line. There are two side-effects of this change:
3360 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3361 logged header lines no longer include the local Received: line, because
3362 it has not yet been created. The same applies to a copy of the message
3363 that is returned to a non-SMTP sender when a message is rejected.
3365 (b) When a filter file is tested using -bf, no additional Received: header
3366 is added to the test message. After some thought, I decided that this
3369 This change does not affect the value of $received_for. It is still set
3370 after address rewriting, but before local_scan() is called.
3372 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3374 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3375 gave an unhelpful panic error message, and a defer error. I have managed to
3376 change this behaviour so that it now rejects any supplied certificate,
3377 which seems right, as the list of acceptable certificates is empty.
3379 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3380 gave an unhelpful defer error. I have not managed to make this reject any
3381 supplied certificates, but the error message it gives is "no certificate
3382 supplied", which is not helpful.
3384 70. exigrep's output now also includes lines that are not associated with any
3385 message, but which match the given pattern. Implemented by a patch from
3386 Martin Sluka, which also tidied up the Perl a bit.
3388 71. Recipient callout verification, like sender verification, was using <> in
3389 the MAIL FROM command. This isn't really the right thing, since the actual
3390 sender may affect whether the remote host accepts the recipient or not. I
3391 have changed it to use the actual sender in the callout; this means that
3392 the cache record is now keyed on a recipient/sender pair, not just the
3393 recipient address. There doesn't seem to be a real danger of callout loops,
3394 since a callout by the remote host to check the sender would use <>.
3395 [SEE ABOVE: changed after hitting problems.]
3397 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3398 temporary errors. However, in the case of such a code being given after
3399 the end of a data transmission (i.e. after ".") Exim was failing to write
3400 a retry record for the message. (Yes, there was some broken host that was
3401 actually sending 8xx at this point.)
3403 73. An unknown lookup type in a host list could cause Exim to panic-die when
3404 the list was checked. (An example that provoked this was putting <; in the
3405 middle of a list instead of at the start.) If this happened during a DATA
3406 ACL check, a -D file could be left lying around. This kind of configuration
3407 error no longer causes Exim to die; instead it causes a defer errror. The
3408 incident is still logged to the main and panic logs.
3410 74. Buglet left over from Exim 3 conversion. The message "too many messages
3411 in one connection" was written to the rejectlog but not the mainlog, except
3412 when address rewriting (yes!) was being logged.
3414 75. Added write_rejectlog option.
3416 76. When a system filter was run not as root (that is, when system_filter_user
3417 was set), the values of the $n variables were not being returned to the
3418 main process; thus, they were not subsequently available in the $sn
3421 77. Added +return_path_on_delivery log selector.
3423 78. A connection timeout was being treated differently from recipients deferred
3424 when testing hosts_max_try with a message that was older than the host's
3425 retry timeout. (The host should not be counted, thus allowing all hosts to
3426 be tried at least once before bouncing.) This may have been the cause of an
3427 occasionally reported bug whereby a message would remain on the queue
3428 longer than the retry timeout, but would be bounced if a delivery was
3429 forced. I say "may" because I never totally pinned down the problem;
3430 setting up timeout/retry tests is difficult. See also the next item.
3432 79. The ultimate address timeout was not being applied to errors that involved
3433 a combination of host plus message (for example, a timeout on a MAIL
3434 command). When an address resolved to a number of possible hosts, and they
3435 were not all tried for each delivery (e.g. because of hosts_max_try), a
3436 message could remain on the queue longer than the retry timeout.
3438 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3441 81. Fixed an obscure SMTP outgoing bug which required at least the following
3442 conditions: (a) there was another message waiting for the same server;
3443 (b) the server returned 5xx to all RCPT commands in the first message so
3444 that the message was not completed; (c) the server dropped the connection
3445 or gave a negative response to the RSET that Exim sends to abort the
3446 transaction. The observed case was a dropped connection after DATA that had
3447 been sent in pipelining mode. That is, the server had advertised PIPELINING
3448 but was not implementing it correctly. The effect of the bug was incorrect
3449 behaviour, such as trying another host, and this could lead to a crash.
3455 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3456 and daemon.c were passed as pointers to ints; they should have been
3457 pointers to socklen_t variables (which are typically unsigned ints).
3459 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3462 3. Fixed a really odd bug that affected only the testing scheme; patching a
3463 certain fixed string in the binary changed the value of another string that
3464 happened to be identical to the end of the original first string.
3466 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3467 name", it returns that address as the IP address. On some operating
3468 systems (e.g. Solaris), it also passes back the IP address string as the
3469 "host name". However, on others (e.g. Linux), it passes back an empty
3470 string. Exim wasn't checking for this, and was changing the host name to an
3471 empty string, assuming it had been canonicized.
3473 5. Although rare, it is permitted to have more than one PTR record for a given
3474 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3475 all the names associated with an address, because they do in Solaris.
3476 However, it seems that they do not in Linux for data that comes from the
3477 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3478 I found this out when I moved to a new Linux workstation and tried to run
3479 the Exim test suite.
3481 To get round this problem I have changed the code so that it now does its
3482 own call to the DNS to look up PTR records when searching for a host name.
3483 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3484 addresses that are only in /etc/hosts are still found.
3486 This behaviour is, however, controlled by an option called host_lookup_
3487 order, which defaults to "bydns:byaddr". If people want to use the other
3488 order, or indeed, just use one or the other means of lookup, they can
3489 specify it in this variable.
3491 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3492 some operating systems, this comes back from gethostbyaddr() as an empty
3493 string, and this is what Exim used to test for. However, it seems that in
3494 other systems, "." is yielded. Exim now tests for this case too.
3496 7. The values of check_spool_space and check_log_space are now held internally
3497 as a number of kilobytes instead of an absolute number of bytes. If a
3498 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3499 kilobyte. This means that much larger values can be stored.
3501 8. Exim monitor: an attempt to get the action menu when not actually pointing
3502 at a message produces an empty menu entitled "No message selected". This
3503 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3504 no entries in it ("Shell widget menu has zero width and/or height"). So I
3505 have added a single, blank menu entry in this case.
3507 9. Added ${quote_local_part.
3509 10. MIME decoding is now applied to the contents of Subject: header lines when
3512 11. Now that a reference to $sender_host_address automatically causes a reverse
3513 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3514 host lookup before query-style lookups in lists that might use this
3515 variable. This has therefore been abolished, and the "net-" prefix is no
3516 longer necessary for query-style lookups.
3518 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3519 have been a typo for LFLAGS, so it has been changed.
3521 13. The install script calls Exim with "-C /dev/null" in order to find the
3522 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3523 to be output. Howeve, since Exim outputs its version number before the
3524 error, it didn't break the script. It just looked ugly. I fixed this by
3525 always allowing "-C /dev/null" if the caller is root.
3527 14. Ignore overlarge ACL variable number when reading spool file - insurance
3528 against a later release with more variables having written the file.
3530 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3531 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3532 this, as well as the form without the "IPv6" on the front.
3534 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3535 OS/Makefile-Darwin file.
3537 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3538 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3540 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3541 variable. However, some OS use ints for inodes. I've added cast to long int
3542 to get rid of the compiler warning.
3544 19. I had forgotten to lock out "/../" in configuration file names when
3545 ALT_CONFIG_PREFIX was set.
3547 20. Routers used for verification do not need to specify transports. However,
3548 if such a router generated a host list, and callout was configured, Exim
3549 crashed, because it could not find a port number from the (non-existent)
3550 transport. It now assumes port 25 in this circumstance.
3552 21. Added the -t option to exigrep.
3554 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3555 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3556 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3557 them is set, LOOKUP_LSEARCH is forced.
3559 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3561 24. Added sender and host information to the "rejected by local_scan()" log
3562 line; previously there was no indication of these.
3564 25. Added .include_if_exists.
3566 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3567 Linux. It turns out that not all file systems support this. Apparently some
3568 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3569 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3570 not supported on the file descriptor, is now ignored when Exim is trying to
3571 sync a directory. This applies only to Linux.
3573 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3575 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3576 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3579 29. Added support for maildirsize files from supplied patch (modified a bit).
3581 30. The use of :fail: followed by an empty string could lead Exim to respond to
3582 sender verification failures with (e.g.):
3584 550 Verification failed for <xxx>
3585 550 Sender verify failed
3587 where the first response line was missing the '-' that indicates it is not
3588 the final line of the response.
3590 31. The loop for finding the name of the user that called Exim had a hardwired
3591 limit of 10; it now uses the value of finduser_retries, which is used for
3592 all other user lookups.
3594 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3597 33. Exim was neglecting to zero errno before one call of strtol() when
3598 expanding a string and expecting an integer value. On some systems this
3599 resulted in spurious "integer overflow" errors. Also, it was casting the
3600 result into an int without checking.
3602 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3603 did not work. The code looks as if it has *never* worked, though it appears
3604 to have been documented since at least releast 1.62. I have made it work.
3606 35. The "timeout_DNS" error in retry rules, also documented since at least
3607 1.62, also never worked. As it isn't clear exactly what this means, and
3608 clearly it isn't a major issue, I have abolished the feature by treating it
3609 as "timeout", and writing a warning to the main and panic logs.
3611 36. The display of retry rules for -brt wasn't always showing the error code
3614 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3615 timeout_connect_A, timeout_connect_MX.
3617 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3618 to the empty sender.
3620 39. The daemon was not analysing the content of -oX till after it had closed
3621 stderr and disconnected from the controlling terminal. This meant that any
3622 syntax errors were only noted on the panic log, and the return code from
3623 the command was 0. By re-arranging the code a little, I've made the
3624 decoding happen first, so such errors now appear on stderr, and the return
3625 code is 1. However, the actual setting up of the sockets still happens in
3626 the disconnected process, so errors there are still only recorded on the
3629 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3630 connections (as happens on some IP stacks) was logged at start up time as
3631 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3632 it from "IPv6 and IPv4", which means that two separate sockets are being
3635 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3636 says whether AF_INET or AF_INET6 was passed as an argument.
3638 42. Exiwhat output was messed up when time zones were included in log
3641 43. Exiwhat now gives more information about the daemon's listening ports,
3642 and whether -tls-on-connect was used.
3644 44. The "port" option of the smtp transport is now expanded.
3646 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3647 silently ignored. Now an error message is written to the main and panic
3650 46. There's a new ACL modifier called "logwrite" which writes to a log file
3651 as soon as it is encountered.
3653 47. Added $local_user_uid and $local_user_gid at routing time.
3655 48. Exim crashed when trying to verify a sender address that was being
3658 49. Exim was recognizing only a space character after ".include". It now also
3659 recognizes a tab character.
3661 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3662 extracting the relevant information from the specification. The man page no
3663 longer contains scrambled data for the -d option, and I've added a section
3664 at the front about calling Exim under different names.
3666 51. Added "extra_headers" argument to the "mail" command in filter files.
3668 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3671 53. Installed eximstats 1.29.
3673 54. Added transport_filter_timeout as a generic transport option.
3675 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3676 Cc: header lines. This was required by RFC 822, but it not required by RFC
3679 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3680 incoming messages that did not have them. Now it does so only if the
3681 message originates locally, that is, if there is no associated remote host
3682 address. When Resent- header lines are present, this applies to the Resent-
3683 lines rather than the non-Resent- lines.
3685 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3686 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3688 58. Messages for configuration errors now include the name of the main
3689 configuration file - useful now that there may be more than one file in a
3690 list (.included file names were always shown).
3692 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3693 for those rare installations that do not start the daemon as root or run it
3694 setuid root. I've cut out the call to initgroups() if the daemon is not
3697 60. The Exim user and group can now be bound into the binary as text strings
3698 that are looked up at the start of Exim's processing.
3700 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3702 62. Added $mailstore_basename variable.
3704 63. Installed patch to sieve.c from Michael Haardt.
3706 64. When Exim failed to open the panic log after failing to open the main log,
3707 the original message it was trying to log was written to stderr and debug
3708 output, but if they were not available (the usual case in production), it
3709 was lost. Now it is written to syslog before the two lines that record the
3710 failures to open the logs.
3712 65. Users' Exim filters run in subprocesses under the user's uid. It is
3713 possible for a "deliver" command or an alias in a "personal" command to
3714 provoke an address rewrite. If logging of address rewriting is configured,
3715 this fails because the process is not running as root or exim. There may be
3716 a better way of dealing with this, but for the moment (because 4.30 needs
3717 to be released), I have disabled address rewrite logging when running a
3718 filter in a non-root, non-exim process.
3724 1. The buildconfig auxiliary program wasn't quoting the value set for
3725 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3726 not defined. This bug was masked in 4.22 by the effect that was fixed in
3729 2. Some messages that were rejected after a message id was allocated were
3730 shown as "incomplete" by exigrep. It no longer does this for messages that
3731 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3733 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3734 have allow_domain_literals set, the ID did not get logged in the <= line.
3735 Domain literals are now always recognized in Message-ID: header lines.
3737 4. The first argument for a ${extract expansion item is the key name or field
3738 number. Leading and trailing spaces in this item were not being ignored,
3739 causing some misleading effects.
3741 5. When deliver_drop_privilege was set, single queue runner processes started
3742 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3743 same command in the process it spins off) were not dropping privilege.
3745 6. When the daemon running as "exim" started a queue runner, it always
3746 re-executed Exim in the spun-off process. This is a waste of effort when
3747 deliver_drop_privilege is set. The new process now just calls the
3748 queue-runner function directly.
3754 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3757 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3758 ignored. Though the use of -oP was forcing the writing of a pid file, it
3759 was always written to the default place.
3761 3. If the message "no IP address found for host xxxx" is generated during
3762 incoming verification, it is now followed by identification of the incoming
3763 connection (so you can more easily find what provoked it).
3765 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3767 5. Added some features to "harden" Exim a bit more against certain attacks:
3769 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3770 be put in Local/Makefile. This is like the never_users runtime option,
3771 but it cannot be overridden. The default setting is "root".
3773 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3774 prefix string with which any file named in a -C command line option
3777 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3778 is retained for -C and -D only if the caller of Exim is root. Without
3779 it, the exim user may also use -C and -D and retain privilege.
3781 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3782 command line option is disabled.
3784 6. Macro names set by the -D option must start with an upper case letter, just
3785 like macro names defined in the configuration file.
3787 7. Added "dereference=" facility to LDAP.
3789 8. Two instances of the typo "uknown" in the source files are fixed.
3791 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3792 the Configure-Makefile script screwed up while processing it.
3794 10. Incorporated PCRE 4.4.
3796 11. The SMTP synchronization check was not operating right at the start of an
3797 SMTP session. For example, it could not catch a HELO sent before the client
3798 waited for the greeting. There is now a check for outstanding input at the
3799 point when the greeting is written. Because of the duplex, asynchronous
3800 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3801 way, but not yet received, when the check is performed.
3803 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3804 on TCP/IP sockets, because this apparently causes some broken clients to
3807 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3808 unchanged) from the Cygwin maintainer.
3810 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3811 was supported instead of testing for mbx. Effectively a typo.
3813 15. The spa authenticator server code was not checking that the input it
3814 received was valid base64.
3816 16. The debug output line for the "set" modifier in ACLs was not showing the
3817 name of the variable that was being set.
3819 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3821 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3822 lookup on its own. Something else was needed to trigger the lookup. For
3823 example, a match in host_lookup or the need for a host name in a host list.
3824 Now, if $sender_host_name is referenced and the host name has not yet been
3825 looked up, a lookup is performed. If the lookup fails, the variable remains
3826 empty, and $host_lookup_failed is set to "1".
3828 19. Added "eqi" as a case-independent comparison operator.
3830 20. The saslauthd authentication condition could segfault if neither service
3831 nor realm was specified.
3833 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3834 error message that was logged was misleading, and incoming SMTP
3835 connections were dropped. The message is now more accurate, and temporary
3836 errors are given to SMTP connections.
3838 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3839 (except RSET) with a 421 error, until QUIT is received. However, it was
3840 failing to send a response to QUIT.
3842 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3843 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3844 ACL is now run after the helo_try_verify_hosts code.
3846 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3847 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3848 case-independent, so other case variants are also recognized). Apparently
3849 some systems use these upper case variants.
3851 25. If more than two messages were waiting for the same host, and a transport
3852 filter was specified for the transport, Exim sent two messages over the
3853 same TCP/IP connection, and then failed with "socket operation on non-
3854 socket" when it tried to send the third.
3856 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3858 27. The extern definition of crypt16() in expand.c was not being excluded when
3859 the OS had its own crypt16() function.
3861 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3862 as a preferred synonym for return_size_limit, both as an option and as an
3865 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3867 30. Changed the default configuration ACL to relax the local part checking rule
3868 for addresses that are not in any local domains. For these addresses,
3869 slashes and pipe symbols are allowed within local parts, but the sequence
3870 /../ is explicitly forbidden.
3872 31. SPA server authentication was not clearing the challenge buffer before
3875 32. log_message in a "warn" ACL statement was writing to the reject log as
3876 well as to the main log, which contradicts the documentation and doesn't
3877 seem right (because no rejection is happening). So I have stopped it.
3879 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3880 However, I am unable to do any testing of this.
3882 34. Fixed an infelicity in the appendfile transport. When checking directories
3883 for a mailbox, to see if any needed to be created, it was accidentally
3884 using path names with one or more superfluous leading slashes; tracing
3885 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3887 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3888 contents are added to the log line that is written for every discarded
3889 recipient. (Previously a log_message setting was ignored.)
3891 36. The ${quote: operator now quotes the string if it is empty.
3893 37. The install script runs exim in order to find its version number. If for
3894 some reason other than non-existence or emptiness, which it checks, it
3895 could not run './exim', it was installing it with an empty version number,
3896 i.e. as "exim-". This error state is now caught, and the installation is
3899 38. An argument was missing from the function that creates an error message
3900 when Exim fails to connect to the socket for saslauthd authentication.
3901 This could cause Exim to crash, or give a corrupted message.
3903 39. Added isip, isip4, and isip6 to ${if conditions.
3905 40. The ACL variables $acl_xx are now saved with the message, and can be
3906 accessed later in routers, transports, and filters.
3908 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3909 strings in the file are not string-expanded.
3911 42. If a MAIL command specified a SIZE value that was too large to fit into an
3912 int variable, the check against message_size_limit failed. Such values are
3913 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3914 day this will have to be increased, but I don't think I want to be around
3915 when emails are that large.
3922 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3923 iconv() is not standard in FreeBSD.
3925 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3926 IPv6 enabled. The observed symptom was a segmentation fault on return from
3927 the function os_common_find_running_interfaces() in src/os.c.
3929 3. In the check_special_case() function in daemon.c I had used "errno" as an
3930 argument name, which causes warnings on some systems. This was basically a
3931 typo, since it was named "eno" in the comments!
3933 4. The code that waits for the clock to tick (at a resolution of some fraction
3934 of a second) so as to ensure message-id uniqueness was always waiting for
3935 at least one whole tick, when it could have waited for less. [This is
3936 almost certainly not relevant at current processor speeds, where it is
3937 unlikely to ever wait at all. But we try to future-proof.]
3939 5. The function that sleeps for a time interval that includes fractions of a
3940 second contained a race. It did not block SIGALRM between setting the
3941 timer, and suspending (a couple of lines later). If the interval was short
3942 and the sigsuspend() was delayed until after it had expired, the suspension
3943 never ended. On busy systems this could lead to processes getting stuck for
3946 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3947 process, before it forks any delivery processes. The open lookup caching
3948 mechanism meant that the open file or database connection was passed into
3949 the delivery process. The problem was that delivery processes always tidy
3950 up cached lookup data. This could cause a problem for the next delivery
3951 process started by the queue runner, because the external queue runner
3952 process does not know about the closure. So the next delivery process
3953 still has data in the lookup cache. In the case of a file lookup, there was
3954 no problem because closing a file descriptor in a subprocess doesn't affect
3955 the parent. However, if the lookup was caching a connection to a database,
3956 the connection was closed, and the second delivery process was likely to
3957 see errors such as "PGSQL: query failed: server closed the connection
3958 unexpectedly". The problem has been fixed by closing all cached lookups
3959 in a queue runner before running a delivery process.
3961 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3962 seem to have the "const" qualifier which it has on other OS. I've
3965 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3966 *of the same type* (client or server) with the same public name that an
3967 error should be diagnosed.
3969 9. When Exim looked up a host name for an IP address, but failed to find the
3970 original IP address when looking up the host name (a safety check), it
3971 output the message "<ip address> does not match any IP for NULL", which was
3972 confusing, to say the least. The bug was that the host name should have
3973 appeared instead of "NULL".
3975 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3976 user that is built into the binary, and the -C or -D options is used, root
3977 privilege is dropped before the configuration file is read. In addition,
3978 logging is switched to stderr instead of the normal log files. If the
3979 configuration then re-defines the Exim user, the unprivileged environment
3980 is probably not what is expected, so Exim logs a panic warning message (but
3983 However, if deliver_drop_privilege is set, the unprivileged state may well
3984 be exactly what is intended, so the warning has been cut out in that case,
3985 and Exim is allowed to try to write to its normal log files.
3991 1. smtp_return_error_details was not giving details for temporary sender
3992 or receiver verification errors.
3994 2. Diagnose a configuration error if two authenticators have the same public
3997 3. Exim used not to create the message log file for a message until the first
3998 delivery attempt. This could be confusing when incoming messages were held
3999 for policy or load reasons. The message log file is now created at the time
4000 the message is received, and an initial "Received" line is written to it.
4002 4. The automatically generated man page for command line options had a minor
4003 bug that caused no ill effects; however, a more serious problem was that
4004 the procedure for building the man page automatically didn't always
4005 operate. Consequently, release 4.20 contains an out-of-date version. This
4006 shouldn't happen again.
4008 5. When building Exim with embedded Perl support, the script that builds the
4009 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4010 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4012 6. The freeze_tell option was not being used for messages that were frozen on
4013 arrival, either by an ACL or by local_scan().
4015 7. Added the smtp_incomplete_transaction log selector.
4017 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4018 was accepting AUTH without a new EHLO.
4020 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4021 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4024 10. Logging of TCP/IP connections (when configured) now happens in the main
4025 daemon process instead of the child process, so that the TCP/IP connection
4026 count is more accurate (but it can never be perfect).
4028 11. The use of "drop" in a nested ACL was not being handled correctly in the
4029 outer ACL. Now, if condition failure induced by the nested "drop" causes
4030 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4031 or "require"), the connection is dropped.
4033 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4034 that yield "discard" can now be used with an "accept" or a "discard" verb,
4035 but an error is generated for any others (because I can't see a useful way
4036 to define what should happen).
4038 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4039 are now processed in the same way as lines in the Exim configuration file.
4040 In particular, continuation lines are supported.
4042 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4044 15. Added -ti meaning -t -i.
4046 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4047 domains, and warn by logging if others are found.
4049 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4050 returned from GIFCONF when Exim is trying to find the list of interfaces on
4051 a host. The code in os.c has been modified to copy each ifreq to an aligned
4052 structure in all cases.
4054 Also, in some cases, the returned ifreq's were being copied to a 'struct
4055 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4056 means the last couple of bytes of an IPv6 address could be chopped if the
4057 ifreq contained only a normal sockaddr (14 bytes storage).
4059 18. Named domain lists were not supported in the hosts_treat_as_local option.
4060 An entry such as +xxxx was not recognized, and was treated as a literal
4063 19. Ensure that header lines added by a DATA ACL are included in the reject log
4064 if the ACL subsequently rejects the message.
4066 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4067 MD5 (which is deprecated).
4069 21. When testing a filter file using -bf, Exim was writing a message when it
4070 took the sender from a "From " line in the message, but it was not doing so
4071 when it took $return_path from a Return-Path: header line. It now does.
4073 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4074 with a valid header line field name (a series of printing characters
4075 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4077 23. Changed "disc" in the source to "disk" to conform to the documentation and
4078 the book and for uniformity.
4080 24. Ignore Sendmail's -Ooption=value command line item.
4082 25. When execve() failed while trying to run a command in a pipe transport,
4083 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4084 could be confused with a return value of 69 from the command itself. This
4085 has been changed to 127, the value the shell returns if it is asked to run
4086 a non-existent command. The wording for the related log line suggests a
4087 non-existent command as the problem.
4089 26. If received_header_text expands to an empty string, do not add a Received:
4090 header line to the message. (Well, it adds a token one on the spool, but
4091 marks it "old" so that it doesn't get used or transmitted.)
4093 27. Installed eximstats 1.28 (addition of -nt option).
4095 28. There was no check for failure on the call to getsockname() in the daemon
4096 code. This can fail if there is a shortage of resources on the system, with
4097 ENOMEM, for example. A temporary error is now given on failure.
4099 29. Contrary to the C standard, it seems that in some environments, the
4100 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4101 program. Exim now does this explicitly; it affects the formatting of
4102 timestamps using strftime().
4104 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4105 complaints. I've now initialized all the variables, to avoid this.
4107 32. Header lines added by a system filter were not being "seen" during
4108 transport-time rewrites.
4110 33. The info_callback() function passed to OpenSSL is set up with type void
4111 (*)(SSL *, int, int), as described somewhere. However, when calling the
4112 function (actually a macro) that sets it up, the type void(*)() is
4113 expected. I've put in a cast to prevent warnings from picky compilers.
4115 34. If a DNS black list lookup found a CNAME record, but there were no A
4116 records associated with the domain it pointed at, Exim crashed.
4118 35. If a DNS black list lookup returned more than one A record, Exim ignored
4119 all but the first. It now scans all returned addresses if a particular IP
4120 value is being sought. In this situation, the contents of the
4121 $dnslist_value variable are a list of all the addresses, separated by a
4124 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4125 to accept a host name and all its aliases if the forward lookup for any of
4126 them yielded the IP address of the incoming connection. Now it accepts only
4127 those names whose forward lookup yields the correct IP address. Any other
4128 names are discarded. This closes a loophole whereby a rogue DNS
4129 administrator could create reverse DNS records to break through a
4130 wildcarded host restriction in an ACL.
4132 37. If a user filter or a system filter that ran in a subprocess used any of
4133 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4134 the wrong values were passed to the pipe command ($thisaddress had the
4135 value of $0, $0 had the value of $1, etc). This bug was introduced by
4136 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4138 38. Improved the line breaking for long SMTP error messages from ACLs.
4139 Previously, if there was no break point between 40 and 75 characters, Exim
4140 left the rest of the message alone. Two changes have been made: (a) I've
4141 reduced the minimum length to 35 characters; (b) if it can't find a break
4142 point between 35 and 75 characters, it looks ahead and uses the first one
4143 that it finds. This may give the occasional overlong line, but at least the
4144 remaining text gets split now.
4146 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4147 file descriptors might be low, and that setting 1000 would always raise it.
4148 It turns out that in some environments, the limit is already over 1000 and
4149 that lowering it causes trouble. So now Exim takes care not to decrease it.
4151 40. When delivering a message, the value of $return_path is set to $sender_
4152 address at the start of routing (routers may change the value). By an
4153 oversight, this default was not being set up when an address was tested by
4154 -bt or -bv, which affected the outcome if any router or filter referred to
4157 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4158 log only when "message" or "log_message" are set. However, if one of the
4159 conditions was an address verification, or a call to a nested ACL, the
4160 messages generated by the underlying test were being passed through. This
4161 no longer happens. The underlying message is available in $acl_verify_
4162 message for both "message" and "log_message" expansions, so it can be
4163 passed through if needed.
4165 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4166 new expansion $bh_ to give the encoded byte string without charset
4167 translation. Translation happens only if iconv() is available; HAVE_ICONV
4168 indicates this at build time. HEADERS_CHARSET gives the charset to
4169 translate to; headers_charset can change it in the configuration, and
4170 "headers charset" can change it in an individual filter file.
4172 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4173 that creates RFC 2047 encoded "words" labels them as that charset instead
4174 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4175 expansion operator; (ii) when Exim creates a From: line for a local
4176 message; (iii) when a header line is rewritten to include a "phrase" part.
4178 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4179 buggy, causing it to skip the first lines of messages whose message ID
4180 ended in 'D'. This would not have bitten before Exim release 4.14, because
4181 message IDs were unlikely to end in 'D' before then. The effect was to have
4182 incorrect size information for certain domains.
4184 45. #include "config.h" was missing at the start of the crypt16.c module. This
4185 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4188 46. If there was a timeout during a "random" callout check, Exim treated it as
4189 a failure of the random address, and carried on sending RSET and the real
4190 address. If the delay was just some slowness somewhere, the response to the
4191 original RCPT would be taken as a response to RSET and so on, causing
4192 mayhem of various kinds.
4194 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4195 when I implemented it. It didn't allow for the fact that some option values
4196 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4197 the right test for positive values.
4199 48. Domain names in DNS records are case-independent. Exim always looks them up
4200 in lower case. Some resolvers return domain names in exactly the case they
4201 appear in the zone file, that is, they may contain uppercase letters. Not
4202 all resolvers do this - some return always lower case. Exim was treating a
4203 change of case by a resolver as a change of domain, similar to a widening
4204 of a domain abbreviation. This triggered its re-routing code and so it was
4205 trying to route what was effectively the same domain again. This normally
4206 caused routing to fail (because the router wouldn't handle the domain
4207 twice). Now Exim checks for this case specially, and just changes the
4208 casing of the domain that it ultimately uses when it transmits the message
4211 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4214 50. If a filter generated a file delivery with a non-absolute name (possible if
4215 no home directory exists for the router), the forbid_file option was not
4218 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4219 the existing equality matching.
4221 52. Exim was using ints instead of ino_t variables in some places where it was
4222 dealing with inode numbers.
4224 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4225 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4226 called TMPDIR, and if it finds it is different, it changes its value.
4228 54. The smtp_printf() function is now made available to local_scan() so
4229 additional output lines can be written before returning. There is also an
4230 smtp_fflush() function to enable the detection of a dropped connection.
4231 The variables smtp_input and smtp_batched_input are exported to
4234 55. Changed the default runtime configuration: the message "Unknown user"
4235 has been removed from the ACL, and instead placed on the localuser router,
4236 using the cannot_route_message feature. This means that any verification
4237 failures that generate their own messages won't get overridden. Similarly,
4238 the "Unrouteable address" message that was in the ACL for unverifiable
4239 relay addresses has also been removed.
4241 56. Added hosts_avoid_esmtp to the smtp transport.
4243 57. The exicyclog script was not checking for the esoteric option
4244 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4245 will work only if exicyclog is run under the appropriate euid.
4247 58. Following a discussion on the list, the rules by which Exim recognises line
4248 endings on incoming messages have been changed. The -dropcr and drop_cr
4249 options are now no-ops, retained only for backwards compatibility. The
4250 following line terminators are recognized: LF CRLF CR. However, special
4251 processing applies to CR:
4253 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4254 nor a local message in the state where . is a terminator.
4256 (ii) If a bare CR is encountered in a header line, an extra space is added
4257 after the line terminator so as not to end the header. The reasoning
4258 behind this is that bare CRs in header lines are most likely either
4259 to be mistakes, or people trying to play silly games.
4261 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4262 was being incorrectly given as 18 bytes larger than it should have been.
4263 This is a VOB (very old bug).
4265 60. This may never have affected anything current, but just in case it has:
4266 When the local host is found other than at the start of a list of hosts,
4267 the local host, those with the same MX, and any that follow, are discarded.
4268 When the list in question was part of a longer list of hosts, the following
4269 hosts (not currently being processed) were also being discarded. This no
4270 longer happens. I'm not sure if this situation could ever has previously
4273 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4276 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4277 header. This is something that is recommended in a new Internet Draft, and
4278 is something that is documented as being done by Sendmail. There are two
4279 possible values. For messages generated by the autoreply transport, Exim
4282 Auto-Submitted: auto-replied
4284 whereas for all other generated messages (e.g. bounces) it adds
4286 Auto-Submitted: auto-generated
4288 63. The "personal" condition in filters now includes a test for the
4289 Auto-Submitted: header. If it contains the string "auto-" the message it
4290 not considered personal.
4292 64. Added rcpt_include_affixes as a generic transport option.
4294 65. Added queue_only_override (default true).
4296 66. Added the syslog_duplication option.
4298 67. If what should have been the first header line of a message consisted of
4299 a space followed by a colon, Exim was mis-interpreting it as a header line.
4300 It isn't of course - it is syntactically invalid and should therefore be
4301 treated as the start of the message body. The misbehaviour could have
4302 caused a number of strange effects, including loss of data in subsequent
4303 header lines, and spool format errors.
4305 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4306 client host had authenticated. This control can now be exercised by an ACL
4307 for more flexibility.
4309 69. By default, callouts do not happen when testing with -bh. There is now a
4310 variant, -bhc, which does actually run the callout code, including
4311 consulting and updating the callout cache.
4313 70. Added support for saslauthd authentication, courtesy of Alexander
4316 71. If statvfs() failed on the spool or log directories while checking their
4317 size for availability, Exim confusingly gave the error "space shortage".
4318 Furthermore, in debugging mode it crashed with a floating point exception.
4319 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4320 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4321 serious problem, Exim now writes to the main and panic logs when this
4322 happens, with details of the failure. It then refuses to accept the
4323 incoming message, giving the message "spool directory problem" or "log
4324 directory problem" with a 421 code for SMTP messages.
4326 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4327 0, 1, and 2 exist, because some OS complain for execs without them (see
4328 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4329 descriptors. However, the code omitted to check that the open succeeded,
4330 causing mysterious errors if for some reason the permissions on /dev/null
4331 got screwed. Now Exim writes a message to the main and panic logs, and
4332 bombs out if it can't open /dev/null.
4334 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4335 interact so that it is all more flexible. It is supposed to remain
4336 backwards compatible. Also added extra_local_interfaces.
4338 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4339 to bomb out with an assertion failure - to the client this appears as a
4340 connection drop. This problem occurs in the part of the code that was taken
4341 from the Samba project. Fortunately, the assertion is in a very simple
4342 function, so I have fixed this by reproducing the function inline in the
4343 one place where it is called, and arranging for authentication to fail
4344 instead of killing the process with assert().
4346 75. The SPA client code was not working when the server requested OEM rather
4347 than Unicode encoding.
4349 76. Added code to make require_files with a specific uid setting more usable in
4350 the case where statting the file as root fails - usually a non-root-mounted
4351 NFS file system. When this happens and the failure is EACCES, Exim now
4352 forks a subprocess and does the per-uid checking as the relevant uid.
4354 77. Added process_log_path.
4356 78. If log_file_path was not explicitly set, a setting of check_log_space or
4357 check_log_inodes was ignored.
4359 79. If a space check for the spool or log partitions fails, the incident is now
4360 logged. Of course, in the latter case the data may get lost...
4362 80. Added the %p formatting code to string_format() so that it can be used to
4363 print addresses in debug_print(). Adjusted all the address printing in the
4364 debugging in store.c to use %p rather than %d.
4366 81. There was a concern that a line of code in smtp_in.c could overflow a
4367 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4368 initially expressed, the concern was not well-founded, because trailing
4369 spaces are removed early. However, if the trailing spaces were followed by
4370 a NULL, they did not get removed, so the overflow was possible. Two fixes
4373 (a) I re-wrote the offending code in a cleaner fashion.
4374 (b) If an incoming SMTP command contains a NULL character, it is rejected
4377 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4378 runs initgroups(), so that if the Exim user is in any additional groups,
4379 they will be used during message reception.
4385 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob