1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.419 2006/10/31 09:50:09 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
8 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
9 leftover -K file (the existence of which was triggered by #402).
10 While we were at it, introduced process PID as part of the -K
11 filename. This should rule out race conditions when creating
14 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
15 processing considerably. Previous code took too long for large mails,
16 triggering a timeout which in turn triggers #401.
18 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
19 in the DK code in transports.c. sendfile() is not really portable,
20 hence the _LINUX specificness.
22 TF/01 In the add_headers option to the mail command in an Exim filter,
23 there was a bug that Exim would claim a syntax error in any
24 header after the first one which had an odd number of characters
27 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
28 callout verification, Exim cached a "reject" for the entire domain. This
29 is correct for most verifications, but it is not correct for a recipient
30 verification with use_sender or use_postmaster set, because in that case
31 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
32 case of MAIL FROM:<> rejection from other early rejections (e.g.
33 rejection of HELO). When verifying a recipient using a non-null MAIL
34 address, the cache is ignored if it shows MAIL FROM:<> rejection.
35 Whatever the result of the callout, the value of the domain cache is
36 left unchanged (for any other kind of callout, getting as far as trying
37 RCPT means that the domain itself is ok).
39 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
42 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
43 manifest itself as EPIPE rather than ECONNECT. When tidying away a
44 session, the daemon ignores ECONNECT errors and logs others; it now
45 ignores EPIPE as well.
47 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
48 (quoted-printable decoding).
50 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
51 later the small subsequent patch to fix an introduced bug.
53 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
55 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
57 PH/08 An error is now given if message_size_limit is specified negative.
59 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
60 to be given (somewhat) arbitrary names.
62 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
65 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
66 miscellaneous code fixes
68 PH/10 Added the log_reject_target ACL modifier to specify where to log
71 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
72 hostname. This is wrong, because it relates to the incoming message (and
73 probably the interface on which it is arriving) and not to the outgoing
74 callout (which could be using a different interface). This has been
75 changed to use the value of the helo_data option from the smtp transport
76 instead - this is what is used when a message is actually being sent. If
77 there is no remote transport (possible with a router that sets up host
78 addresses), $smtp_active_hostname is used.
80 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
81 tweaks were necessary in order to get it to work (see also 21 below):
82 (a) The code assumed that strncpy() returns a negative number on buffer
83 overflow, which isn't the case. Replaced with Exim's string_format()
85 (b) There were several signed/unsigned issues. I just did the minimum
86 hacking in of casts. There is scope for a larger refactoring.
87 (c) The code used strcasecmp() which is not a standard C function.
88 Replaced with Exim's strcmpic() function.
89 (d) The code set only $1; it now sets $auth1 as well.
90 (e) A simple test gave the error "authentication client didn't specify
91 service in request". It would seem that Dovecot has changed its
92 interface. Fortunately there's a specification; I followed it and
93 changed what the client sends and it appears to be working now.
95 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
98 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
99 address A is aliased to B and C, where B exists and C does not. Without
100 -v the output is "A verified" because verification stops after a
101 successful redirection if more than one address is generated. However,
102 with -v the child addresses are also verified. Exim was outputting "A
103 failed to verify" and then showing the successful verification for C,
104 with its parentage. It now outputs "B failed to verify", showing B's
105 parentage before showing the successful verification of C.
107 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
108 look up a TXT record in a specific list after matching in a combined
111 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
112 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
113 they consult the DNS. I had assumed they would set it the way they
114 wanted; and indeed my experiments on Linux seem to show that in some
115 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
116 To be on the safe side, however, I have now made the interface to
117 host_find_byname() similar to host_find_bydns(), with an argument
118 containing the DNS resolver options. The host_find_byname() function now
119 sets these options at its start, just as host_find_bydns() does. The smtp
120 transport options dns_qualify_single and dns_search_parents are passed to
121 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
122 of host_find_byname() use the default settings of RES_DEFNAMES
123 (qualify_single) but not RES_DNSRCH (search_parents).
125 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
126 spool_read_header() do less string testing, by means of a preliminary
127 switch on the second character of optional "-foo" lines. (This is
128 overdue, caused by the large number of possibilities that now exist.
129 Originally there were few.) While I was there, I also converted the
130 str(n)cmp tests so they don't re-test the leading "-" and the first
131 character, in the hope this might squeeze out yet more improvement.
133 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
134 flag allowing group syntax was set by the header_syntax check but not
135 turned off, possible causing trouble later; (2) The flag was not being
136 set at all for the header_verify test, causing "group"-style headers to
137 be rejected. I have now set it in this case, and also caused header_
138 verify to ignore an empty address taken from a group. While doing this, I
139 came across some other cases where the code for allowing group syntax
140 while scanning a header line wasn't quite right (mostly, not resetting
141 the flag correctly in the right place). These bugs could have caused
142 trouble for malformed header lines. I hope it is now all correct.
144 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
145 with the "reply" argument non-NULL. The code, however (which originally
146 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
147 but it didn't always do it. This confused somebody who was copying the
148 code for some other use. I have removed all the tests.
150 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
151 feature that was used to support insecure browsers during the U.S. crypto
152 embargo. It requires special client support, and Exim is probably the
153 only MTA that supported it -- and would never use it because real RSA is
154 always available. This code has been removed, because it had the bad
155 effect of slowing Exim down by computing (never used) parameters for the
156 RSA_EXPORT functionality.
158 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
159 authenticator to fail if there's a tab character in the incoming data
160 (there should never be unless someone is messing about, as it's supposed
161 to be base64-encoded). Also added, on Timo's advice, the "secured" option
162 if the connection is using TLS or if the remote IP is the same as the
163 local IP, and the "valid-client-cert option" if a client certificate has
166 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
167 authenticators. This can be used for authorization after authentication
168 succeeds. (In the case of plaintext, it servers for both authentication
171 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
172 if any retry times were supplied.
174 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
175 connection, where there is no client IP address to check. In this
176 situation, the verify now always succeeds.
178 PH/25 Applied John Jetmore's -Mset patch.
180 PH/26 Added -bem to be like -Mset, but loading a message from a file.
182 PH/27 In a string expansion for a processed (not raw) header when multiple
183 headers of the same name were present, leading whitespace was being
184 removed from all of them, but trailing whitespace was being removed only
185 from the last one. Now trailing whitespace is removed from each header
186 before concatenation. Completely empty headers in a concatenation (as
189 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
190 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
192 PH/29 [Removed. This was a change that I later backed out, and forgot to
193 correct the ChangeLog entry (that I had efficiently created) before
194 committing the later change.]
196 PH/30 Exim was sometimes attempting to deliver messages that had suffered
197 address errors (4xx response to RCPT) over the same connection as other
198 messages routed to the same hosts. Such deliveries are always "forced",
199 so retry times are not inspected. This resulted in far too many retries
200 for the affected addresses. The effect occurred only when there were more
201 hosts than the hosts_max_try setting in the smtp transport when it had
202 the 4xx errors. Those hosts that it had tried were not added to the list
203 of hosts for which the message was waiting, so if all were tried, there
204 was no problem. Two fixes have been applied:
206 (i) If there are any address or message errors in an SMTP delivery, none
207 of the hosts (tried or untried) are now added to the list of hosts
208 for which the message is waiting, so the message should not be a
209 candidate for sending over the same connection that was used for a
210 successful delivery of some other message. This seems entirely
211 reasonable: after all the message is NOT "waiting for some host".
212 This is so "obvious" that I'm not sure why it wasn't done
213 previously. Hope I haven't missed anything, but it can't do any
214 harm, as the worst effect is to miss an optimization.
216 (ii) If, despite (i), such a delivery is accidentally attempted, the
217 routing retry time is respected, so at least it doesn't keep
218 hammering the server.
224 SC/01 Use a glob alias rather than an array ref in eximstats generated
225 parser. This improves both readability and performance.
227 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
228 Don't display local sender or destination tables in eximstats unless
229 there is data to show.
230 Added average volumes into the eximstats top table text output.
232 SC/03 Collect data on the number of addresses (recipients) as well
233 as the number of messages in eximstats.
235 TF/01 Correct an error in the documentation for the redirect router. Exim
236 does (usually) call initgroups() when daemonizing.
238 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
239 with consistent privilege compared to when running as a daemon.
241 TF/03 Note in the spec that $authenticated_id is not set for local
242 submissions from trusted users.
244 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
245 Thanks to Dean Brooks <dean@iglou.com> for the patch.
247 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
248 by adding some example configuration directives to the default
249 configuration file. A little bit of work is required to uncomment the
250 directives and define how usernames and passwords are checked, but
251 there is now a framework to start from.
253 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
254 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
255 without this. I don't know how relevant this is to other LDAP libraries.
257 PH/02 Add the verb name to the "unknown ACL verb" error.
259 PH/03 Magnus Holmgren's patch for filter_prepend_home.
261 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
263 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
264 directory not expanded when it should be if an expanded home directory
265 was set for the address (which is overridden by the transport).
267 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
270 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
271 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
272 because it is too late at that time, and has no effect.
274 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
275 security issue with \' (bugzilla #107). I could not use the
276 PQescapeStringConn() function, because it needs a PGconn value as one of
279 PH/08 When testing addresses using -bt, indicate those final addresses that
280 are duplicates that would not cause an additional delivery. At least one
281 person was confused, thinking that -bt output corresponded to deliveries.
282 (Suppressing duplicates isn't a good idea as you lose the information
283 about possibly different redirections that led to the duplicates.)
285 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
286 systems where poll() doesn't work, in particular OS X.
288 PH/10 Added more information to debugging output for retry time not reached.
290 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
291 operations in malware.c.
293 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
296 PH/13 If write_rejectlog was set false when logging was sent to syslog with
297 syslog_duplication set false, log lines that would normally be written
298 both the the main log and to the reject log were not written to syslog at
301 PH/14 In the default configuration, change the use of "message" in ACL warn
302 statements to "add_header".
304 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
305 not followed by a command (e.g. "seen endif").
307 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
308 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
311 PH/17 Added extra conditions to the default value of delay_warning_condition
315 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
316 { match{$h_precedence:}{(?i)bulk|list|junk} } \
317 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
320 The Auto-Submitted: and various List- headers are standardised, whereas I
321 don't think Precedence: ever was.
323 PH/18 Refactored debugging code in route_finduser() to show more information,
324 in particular, the error code if getpwnam() issues one.
326 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
327 This is apparently needed in addition to the PH/07 change above to avoid
328 any possible encoding problems.
330 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
331 but not after initializing Perl.
333 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
334 output them only if debugging. By default they are written stderr,
335 apparently, which is not desirable.
337 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
340 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
343 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
345 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
346 authenticated or an ident call has been made. Suppress the default
347 values for $authenticated_id and $authenticated_sender (but permit -oMai
348 and -oMas) when testing with -bh.
350 PH/24 Re-jigged the order of the tests in the default configuration so that the
351 tests for valid domains and recipients precede the DNS black list and CSA
352 tests, on the grounds that those ones are more expensive.
354 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
355 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
356 This bug exists in every version of Exim that I still have, right back to
359 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
360 However, an attempt to turn on case-sensitivity in a regex key by
361 including (?-i) didn't work because the subject string was already
362 lowercased, and the effects were non-intuitive. It turns out that a
363 one-line patch can be used to allow (?-i) to work as expected.
369 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
370 other effects) broke the use of negated acl sub-conditions.
372 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
375 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
376 "Deny" causes Exim to reject the incoming connection with a 554 error.
377 Unfortunately, if there is a major crisis, such as a disk failure,
378 tcp-wrappers gives "deny", whereas what one would like would be some
379 kind of temporary error. A kludge has been added to help with this.
380 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
381 554 error is used if errno is still zero or contains ENOENT (which occurs
382 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
385 PH/03 Add -lutil to the default FreeBSD LIBS setting.
387 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
388 errors. Otherwise a message that provokes a temporary error (when other
389 messages do not) can cause a whole host to time out.
391 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
392 addresses were routed directly to files or pipes from a redirect router.
393 File deliveries just didn't batch; pipe deliveries might have suffered
396 PH/06 A failure to get a lock for a hints database would erroneously always say
397 "Failed to get write lock", even when it was really a read lock.
399 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
400 of 0600. This has been changed to use the value of the lockfile_mode
401 option (which defaults to 0600).
403 PH/08 Applied small patch from the Sieve maintainer.
405 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
406 folder from quota calculations, a direct delivery into this folder messed
407 up the contents of the maildirsize file. This was because the regex was
408 used only to exclude .Trash (or whatever) when the size of the mailbox
409 was calculated. There was no check that a delivery was happening into an
410 excluded directory. This bug has been fixed by ignoring all quota
411 processing for deliveries into excluded directories.
413 PH/10 Added the maildirfolder_create_regex option to appendfile.
419 PH/01 The code for finding all the local interface addresses on a FreeBSD
420 system running IPv6 was broken. This may well have applied to all BSD
421 systems, as well as to others that have similar system calls. The broken
422 code found IPv4 interfaces correctly, but gave incorrect values for the
423 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
424 that it would not match correctly against @[] and not recognize the IPv6
427 PH/02 The ipliteral router was not recognizing addresses of the form user@
428 [ipv6:....] because it didn't know about the "ipv6:" prefix.
430 PH/03 Added disable_ipv6.
432 PH/04 Changed $reply_address to use the raw form of the headers instead of the
433 decoded form, because it is most often used to construct To: headers
434 lines in autoreplies, and the decoded form may well be syntactically
435 invalid. However, $reply_address has leading white space removed, and all
436 newlines turned into spaces so that the autoreply transport does not
439 PH/05 If group was specified without a user on a router, and no group or user
440 was specified on a transport, the group from the router was ignored.
442 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
443 for visible compile-time settings that can be used to change these
444 numbers, for those that want even more. Backwards compatibility with old
445 spool files has been maintained. However, going back to a previous Exim
446 release will lost any variables that are in spool files.
448 PH/07 Two small changes when running in the test harness: increase delay when
449 passing a TCP/IP connection to a new process, in case the original
450 process has to generate a bounce, and remove special handling of
451 127.0.0.2 (sic), which is no longer necessary.
453 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
454 be the same on different OS.
456 PH/09 Moved a debug statement in filter processing to avoid a race problem when
459 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
460 whether --show-vars was specified or not
462 JJ/02 exipick: Added support for new ACL variable spool format introduced
465 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
466 syntactically invalid From: or Reply-to: line, and a filter used this to
467 generate an autoreply, and therefore failed to obtain an address for the
468 autoreply, Exim could try to deliver to a non-existent relative file
469 name, causing unrelated and misleading errors. What now happens is that
470 it logs this as a hard delivery error, but does not attempt to create a
473 PH/11 The exinext utility has a -C option for testing purposes, but although
474 the given file was scanned by exinext itself; it wasn't being passed on
475 when Exim was called.
477 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
478 an end-of-file indication when reading a command response.
480 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
481 compiled. In many other places in Exim, IPv6 addresses are always
482 recognized, so I have changed this. It also means that IPv4 domain
483 literals of the form [IPV4:n.n.n.n] are now always recognized.
485 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
486 used if the router is not running as root, for example, when verifying at
487 ACL time, or when using -bh. The debugging output from this situation was
488 non-existent - all you got was a failure to exec. I have made two
491 (a) Failures to set uid/gid, the current directory, or a process leader
492 in a subprocess such as that created by queryprogram now generate
493 suitable debugging ouput when -d is set.
495 (b) The queryprogram router detects when it is not running as root,
496 outputs suitable debugging information if -d is set, and then runs
497 the subprocess without attempting to change uid/gid.
499 PH/15 Minor change to Makefile for building test_host (undocumented testing
502 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
503 additional section of a DNS packet that returns MX or SRV records.
504 Instead, it always explicitly searches for A/AAAA records. This avoids
505 major problems that occur when a DNS server includes only records of one
506 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
507 fixed another bug: if SRV records were looked up and the corresponding
508 address records were *not* found in the additional section, the port
509 values from the SRV records were lost.
511 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
512 using the correct key (the original address) when searching the retry
513 rules in order to find which one to use for generating the retry hint.
515 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
516 adding the default one. Similarly, if it contains a Reply-To: header, the
517 errors_reply_to option, if set, is not used.
519 PH/19 When calculating a retry time, Exim used to measure the "time since
520 failure" by looking at the "first failed" field in the retry record. Now
521 it does not use this if it is later than than the arrival time of the
522 message. Instead it uses the arrival time. This makes for better
523 behaviour in cases where some deliveries succeed, thus re-setting the
524 "first failed" field. An example is a quota failure for a huge message
525 when small messages continue to be delivered. Without this change, the
526 "time since failure" will always be short, possible causing more frequent
527 delivery attempts for the huge message than are intended.
528 [Note: This change was subsequently modified - see PH/04 for 4.62.]
530 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
531 $1, $2, $3) because the numerical variables can be reset during some
532 expansion items (e.g. "match"), thereby losing the authentication data.
534 PH/21 Make -bV show the size of off_t variables so that the test suite can
535 decide whether to run tests for quotas > 2G.
537 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
538 mailbox_size, and mailbox_filecount in the appendfile transport. If a
539 filecount value is greater than 2G or if a quota value is greater than 2G
540 on a system where the size of off_t is not greater than 4, a panic error
543 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
544 never match. The debug and -bh output now contains an explicit error
545 message indicating a malformed IPv4 address or mask.
547 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
548 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
551 PH/25 Do not write to syslog when running in the test harness. The only
552 occasion when this arises is a failure to open the main or panic logs
553 (for which there is an explicit test).
555 PH/26 Added the /no_tell option to "control=freeze".
557 PH/27 If a host name lookup failed very early in a connection, for example, if
558 the IP address matched host_lookup and the reverse lookup yielded a name
559 that did not have a forward lookup, an error message of the form "no IP
560 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
561 could be logged. Now it outputs the IP address instead of "NULL".
563 PH/28 An enabling patch from MH: add new function child_open_exim2() which
564 allows the sender and the authenticated sender to be set when
565 submitting a message from within Exim. Since child_open_exim() is
566 documented for local_scan(), the new function should be too.
568 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
569 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
570 results in an empty string is now treated as unset.
572 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
574 PH/31 Added sender_verify_fail logging option.
576 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
577 needed by RFC 822 but not by RFC 2822 was commented out. I have now
578 tidied the source and removed it altogether.
580 PH/33 When a queue run was abandoned because the load average was too high, a
581 log line was always written; now it is written only if the queue_run log
582 selector is set. In addition, the log line for abandonment now contains
583 information about the queue run such as the pid. This is always present
584 in "start" and "stop" lines but was omitted from the "abandon" line.
586 PH/34 Omit spaces between a header name and the colon in the error message that
587 is given when verify = headers_syntax fails (if there are lots of them,
588 the message gets confusing).
590 PH/35 Change the default for dns_check_names_pattern to allow slashes within
591 names, as there are now some PTR records that contain slashes. This check
592 is only to protect against broken name servers that fall over on strange
593 characters, so the fact that it applies to all lookups doesn't matter.
595 PH/36 Now that the new test suite is complete, we can remove some of the
596 special code in Exim that was needed for the old test suite. For example,
597 sorting DNS records because real resolvers return them in an arbitrary
598 order. The new test suite's fake resolver always returns records in the
601 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
602 bounces) except when queue_only is set, to avoid logging races between
603 the different processes.
605 PH/38 Panic-die if .include specifies a non-absolute path.
607 PH/39 A tweak to the "H" retry rule from its user.
609 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
610 a label. They prevented compilation on older perls.
612 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
613 a warning to be raised on newish perls.
615 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
616 on queue. Changes to match documented behaviour of showing count of
617 messages matching specified criteria.
619 PH/40 Changed the default ident timeout from 30s to 5s.
621 PH/41 Added support for the use of login_cap features, on those BSD systems
622 that have them, for controlling the resources used by pipe deliveries.
624 PH/42 The content-scanning code uses fopen() to create files in which to put
625 message data. Previously it was not paying any attention to the mode of
626 the files. Exim runs with umask(0) because the rest of the code creates
627 files with open(), and sets the required mode explicitly. Thus, these
628 files were ending up world-writeable. This was not a big issue, because,
629 being within the spool directory, they were not world-accessible. I have
630 created a function called modefopen, which takes an additional mode
631 argument. It sets umask(777), creates the file, chmods it to the required
632 mode, then resets the umask. All the relevant calls to fopen() in the
633 content scanning code have been changed to use this function.
635 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
636 to 24 hours. This avoids potential overflow problems when processing G
637 and H retry rules. I suspect nobody ever tinkers with this value.
639 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
641 PH/45 When the plaintext authenticator is running as a client, the server's
642 challenges are checked to ensure they are valid base64 strings. By
643 default, the authentication attempt is cancelled if an invalid string is
644 received. Setting client_ignore_invalid_base64 true ignores these errors.
645 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
646 they are received. Thus, the responses can be made to depend on the
647 challenges. If an invalid string is ignored, an empty string is placed in
650 PH/46 Messages that are created by the autoreply transport now contains a
651 References: header, in accordance with RFCs 2822 and 3834.
653 PH/47 Added authenticated_sender_force to the smtp transport.
655 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
657 PH/49 Installed latest patch from the Sieve maintainer.
659 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
660 was also set, the appendfile transport was unnecessarily scanning a
661 directory of message files (e.g. for maildir delivery) to find the count
662 of files (along with the size), even though it did not need this
663 information. It now does the scan only if it needs to find either the
664 size of the count of files.
666 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
668 PH/52 Two bugs concerned with error handling when the smtp transport is
671 (i) Exim was not creating retry information for temporary errors given
672 for individual recipients after the DATA command when the smtp transport
673 was used in LMTP mode. This meant that they could be retried too
674 frequently, and not timed out correctly.
676 (ii) Exim was setting the flag that allows error details to be returned
677 for LMTP errors on RCPT commands, but not for LMTP errors for individual
678 recipients that were returned after the DATA command.
680 PH/53 This is related to PH/52, but is more general: for any failing address,
681 when detailed error information was permitted to be returned to the
682 sender, but the error was temporary, then after the final timeout, only
683 "retry timeout exceeded" was returned. Now it returns the full error as
684 well as "retry timeout exceeded".
686 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
687 do this, and (what is worse) MTAs that accept it.
689 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
690 will now be deprecated.
692 PH/56 New os.c-cygwin from the Cygwin maintainer.
694 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
695 formats (previously only available in exim formats via -bpr, -bpru,
696 and -bpra. Now also available in native and exiqgrep formats)
698 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
699 with very large, slow to parse queues
701 JJ/08 exipick: added ! as generic prefix to negate any criteria format
703 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
705 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
706 responses to authentication challenges, though it was showing the
707 challenges; (ii) I've removed the CR characters from the debug output for
710 PH/58 Allow for the insertion of a newline as well as a space when a string
711 is turned into more than one encoded-word during RFC 2047 encoding. The
712 Sieve code now uses this.
714 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
715 data_4xx, lost_connection, tls_required.
717 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
718 message was being sent as an SMTP response.
720 PH/61 Add -l and -k options to exicyclog.
722 PH/62 When verifying, if an address was redirected to one new address, so that
723 verification continued, and the new address failed or deferred after
724 having set something in $address_data, the value of $address_data was not
725 passed back to the ACL. This was different to the case when no
726 redirection occurred. The value is now passed back in both cases.
728 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
729 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
730 use login_cap.h, so on its own it isn't the distinguishing feature. The
731 new name refers directly to the setclassresources() function.
733 PH/65 Added configuration files for NetBSD3.
735 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
737 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
738 is preferred over IPv4.
740 PH/68 The bounce_return_message and bounce_return_body options were not being
741 honoured for bounces generated during the reception of non-SMTP messages.
742 In particular, this applied to messages rejected by the ACL. This bug has
743 been fixed. However, if bounce_return_message is true and bounce_return_
744 body is false, the headers that are returned for a non-SMTP message
745 include only those that have been read before the error was detected.
746 (In the case of an ACL rejection, they have all been read.)
748 PH/69 The HTML version of the specification is now built in a directory called
749 spec_html instead of spec.html, because the latter looks like a path with
750 a MIME-type, and this confuses some software.
752 PH/70 Catch two compiler warnings in sieve.c.
754 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
755 function verify_get_ident() calls ip_connect() to connect a socket, but
756 if the "connect()" function timed out, ip_connect() used to close the
757 socket. However, verify_get_ident() also closes the socket later, and in
758 between Exim writes to the log, which may get opened at this point. When
759 the socket was closed in ip_connect(), the log could get the same file
760 descriptor number as the socket. This naturally causes chaos. The fix is
761 not to close the socket in ip_connect(); the socket should be closed by
762 the function that creates it. There was only one place in the code where
763 this was missing, in the iplookup router, which I don't think anybody now
764 uses, but I've fixed it anyway.
766 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
767 well as to direct DNS lookups. Otherwise the handling of names in host
768 lists is inconsistent and therefore confusing.
774 PH/01 Two changes to the default runtime configuration:
776 (1) Move the checks for relay_from_hosts and authenticated clients from
777 after to before the (commented out) DNS black list checks.
779 (2) Add control=submission to the relay_from_hosts and authenticated
780 clients checks, on the grounds that messages accepted by these
781 statements are most likely to be submissions.
783 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
785 (1) Generate an error if the third argument for the ${prvs expansion is
788 (2) Treat a missing third argument of ${prvscheck as if it were an empty
791 (3) Reset the variables that are obtained from the first argument of
792 ${prvscheck and used in the second argument before leaving the code,
793 because their memory is reclaimed, so using them afterwards may do
796 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
797 one (it's much easier than Tom thought :-).
799 (5) Because of (4), we can now allow for the use of $prvscheck_result
800 inside the third argument.
802 PH/03 For some reason, the default setting of PATH when running a command from
803 a pipe transport was just "/usr/bin". I have changed it to
806 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
807 anything to be listed in the output from -bV.
809 PH/05 When a filter generated an autoreply, the entire To: header line was
810 quoted in the delivery log line, like this:
812 => >A.N.Other <ano@some.domain> <original@ddress> ...
814 This has been changed so that it extracts the operative address. There
815 may be more than one such address. If so, they are comma-separated, like
818 => >ano@some.domain,ona@other.domain <original@ddress> ...
820 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
821 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
822 not being looked up in the rDNS to get a host name, Exim was showing the
823 IP address twice in Received: lines, even though the IP addresses were
824 identical. For example:
826 Received: from [1.2.3.4] (helo=[1.2.3.4])
828 However, if the real host name was known, it was omitting the HELO data
829 if it matched the actual IP address. This has been tidied up so that it
830 doesn't show the same IP address twice.
832 PH/07 When both +timestamp and +memory debugging was on, the value given by
833 $tod_xxx expansions could be wrong, because the tod_stamp() function was
834 called by the debug printing, thereby overwriting the timestamp buffer.
835 Debugging no longer uses the tod_stamp() function when +timestamp is set.
837 PH/08 When the original message was included in an autoreply transport, it
838 always said "this is a copy of the message, including all the headers",
839 even if body_only or headers_only was set. It now gives an appropriate
842 PH/09 Applied a patch from the Sieve maintainer which:
844 o fixes some comments
845 o adds the (disabled) notify extension core
846 o adds some debug output for the result of if/elsif tests
847 o points to the current vacation draft in the documentation
848 and documents the missing references header update
852 o fixes a bug in processing the envelope test (when testing
853 multiple envelope elements, the last element determinted the
856 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
857 Electronic Mail") by including:
859 Auto-submitted: auto-generated
861 in the messages that it generates (bounce messages and others, such as
862 warnings). In the case of bounce messages for non-SMTP mesages, there was
863 also a typo: it was using "Auto_submitted" (underscore instead of
864 hyphen). Since every message generated by Exim is necessarily in response
865 to another message, thes have all been changed to:
867 Auto-Submitted: auto-replied
869 in accordance with these statements in the RFC:
871 The auto-replied keyword:
873 - SHOULD be used on messages sent in direct response to another
874 message by an automatic process,
876 - MUST NOT be used on manually-generated messages,
878 - MAY be used on Delivery Status Notifications (DSNs) and Message
879 Disposition Notifications (MDNs),
881 - MUST NOT be used on messages generated by automatic or periodic
882 processes, except for messages which are automatic responses to
885 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
886 to the default Received: header definition.
888 PH/12 Added log selector acl_warn_skipped (default on).
890 PH/13 After a successful wildlsearch lookup, discard the values of numeric
891 variables because (a) they are in the wrong storage pool and (b) even if
892 they were copied, it wouldn't work properly because of the caching.
894 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
895 checking when decoding. Apparently there are clients that generate
896 overlong encoded strings. Why am I not surprised?
898 PH/15 If the first argument of "${if match_address" was not empty, but did not
899 contain an "@" character, Exim crashed. Now it writes a panic log message
900 and treats the condition as false.
902 PH/16 In autoreply, treat an empty string for "once" the same as unset.
904 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
905 extension "envelope-auth". The code is finished and in agreement with
906 other implementations, but there is no documentation so far and in fact,
907 nobody wrote the draft yet. This extension is currently #undef'ed, thus
908 not changing the active code.
910 Print executed "if" and "elsif" statements when debugging is used. This
911 helps a great deal to understand what a filter does.
913 Document more things not specified clearly in RFC3028. I had all this
914 sorted out, when out of a sudden new issues came to my mind. Oops."
916 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
919 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
920 canonical form (as documented). However, after a host name lookup from
921 the IP address, check_host() was doing a simple string comparison with
922 addresses acquired from the DNS when checking that the found name did
923 have the original IP as one of its addresses. Since any found IPv6
924 addresses are likely to be in abbreviated form, the comparison could
925 fail. Luckily, there already exists a function for doing the comparison
926 by converting both addresses to binary, so now that is used instead of
929 PH/20 There was another similar case to PH/19, when a complete host name was
930 given in a host list; looking up its IP address could give an abbreviated
931 form, whereas the current host's name might or might not be abbreviated.
932 The same fix has been applied.
938 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
939 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
942 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
943 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
945 PH/03 Typo: missing ".o" in src/pcre/Makefile.
947 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
948 header line, restrict the check to what is listed in RFCs 2369 and 2929.
949 Also, for "Auto-Submitted", treat anything other than "no" as
950 non-personal, in accordance with RFC 3834. (Previously it treated
951 anything starting "auto-" as non-personal.)
953 TF/01 The control=submission/name=... option had a problem with syntax
954 errors if the name included a slash character. The /name= option
955 now slurps the rest of the string, so it can include any characters
956 but it must come last in the list of options (after /sender_retain
959 PH/05 Some modifications to the interface to the fake nameserver for the new
967 TK/01 Added the "success_on_redirect" address verification option. See
968 NewStuff for rationale and an example.
970 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
972 PH/02 Patch to exigrep to allow it to work on syslog lines.
974 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
975 fread() to skip over the body file's header line, because in Cygwin the
976 header line is locked and is inaccessible.
978 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
979 co-exist for some time) to make it clear that it is the Exim ID that is
980 referenced, not the Message-ID: header line.
982 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
983 string_format() function, because snprintf() does not exist on all
986 PH/06 The use of forbid_filter_existstest now also locks out the use of the
987 ${stat: expansion item.
989 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
990 protocol synchronization error", to keep the pedants happy.
992 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
993 well as for IRIX systems, when gcc is being used. See the host.c source
996 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
998 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1001 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1002 transport and to the smtp transport in LMTP mode.
1004 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1006 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1007 run a filter in a subprocess. This could lead to confusion in subsequent
1008 lookups in the parent process. There should also be a search_tidyup() at
1009 the end of the subprocess.
1011 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1012 only if the host matched helo_try_verify_hosts, which caused the
1013 verification to occur when the EHLO/HELO command was issued. The ACL just
1014 tested the remembered result. Now, if a previous verification attempt has
1015 not happened, "verify = helo" does it there and then.
1017 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1019 TK/03 Fix log output including CR from clamd.
1021 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1022 exist provoked a memory error which could cause a segfault.
1024 PH/15 Installed PCRE 6.2
1026 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1028 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1029 of the problem. Specifically, suggested +O2 rather than +O1 for the
1032 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1034 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1035 record, the port was not correctly logged when the outgoing_port log
1036 selector was set (it logged the transort's default port).
1038 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1039 fallback_hosts, and "hosts" in the smtp transport.
1041 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1042 host errors such as "Connection refused".
1044 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1045 authentication with radiusclient 0.4.9:
1047 - Error returned from rc_read_config was caught wrongly
1048 - Username/password not passed on to radius server due to wrong length.
1050 The presumption is that some radiusclient API changes for 4.51/PH/17
1051 were not taken care of correctly. The code is still untested by me (my
1052 Linux distribution still has 0.3.2 of radiusclient), but it was
1053 contributed by a Radius user.
1055 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1056 expanding the "port" option of the smtp transport.
1058 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1059 while reading a MIME header. Thanks to Tom Hughes for a patch.
1061 PH/24 Include config.h inside local_scan.h so that configuration settings are
1064 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1065 that in an ACL for RCPT (for example), you can examine exactly what was
1068 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1069 commands, but it was not correctly comparing the address with the actual
1070 client host address. Thus, it would show the EHLO address in Received:
1071 header lines when this was not necessary.
1073 PH/27 Added the % operator to ${eval:}.
1075 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1076 it should be ignoring failures (because with -C, for example, it has lost
1077 privilege). It wasn't ignoring creation failures other than "already
1080 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1083 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1084 because an input line was too long, either on its own, or by virtue of
1085 too many continuations, the temporary file was not being removed, and the
1086 return code was incorrect.
1088 PH/31 Missing "BOOL" in function definition in filtertest.c.
1090 PH/32 Applied Sieve patches from the maintainer.
1092 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1094 PH/33 Added "verify = not_blind".
1096 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1097 Local/Makefile (with some defaults set). These are used in built scripts
1098 such as exicyclog, but they have never been used in the exim_install
1099 script (though there are many overriding facilities there). I have
1100 arranged that the exim_install script now takes note of these two
1103 PH/35 Installed configuration files for Dragonfly.
1105 PH/36 When a locally submitted message by a trusted user did not contain a
1106 From: header, and the sender address was obtained from -f or from an SMTP
1107 MAIL command, and the trusted user did not use -F to supply a sender
1108 name, $originator_name was incorrectly used when constructing a From:
1109 header. Furthermore, $originator_name was used for submission mode
1110 messages from external hosts without From: headers in a similar way,
1111 which is clearly wrong.
1113 PH/37 Added control=suppress_local_fixups.
1115 PH/38 When log_selector = +received_sender was set, and the addition of the
1116 sender made the log line's construction buffer exactly full, or one byte
1117 less than full, an overflow happened when the terminating "\n" was
1120 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1121 when the result of a list match is failure because a DNS lookup failed.
1123 PH/40 RM_COMMAND is now used in the building process.
1125 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1126 the "build-* directories that it finds.
1128 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1129 address in a domain literal was a prefix of an interface address.
1131 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1132 when verifying a sender address, unless rewrite_headers is false.
1134 PH/44 Wrote a long comment about why errors_to addresses are verified as
1135 recipients, not senders.
1137 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1138 the ratelimit ACL was added.
1140 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1142 PH/46 Added extra information about PostgreSQL errors to the error string.
1144 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1145 avoiding the need to install special zones in a real server. This is
1146 backwards compatible; if it can't find the fake resolver, it drops back.
1147 Thus, both old and new test suites can be run.
1149 TF/02 Added util/ratelimit.pl
1151 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1152 clock is set back in time.
1154 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1155 Candler <B.Candler@pobox.com>.
1157 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1158 OK for addresses that are the result of redirections.
1160 PH/48 A number of further additions for the benefit of the new test suite,
1161 including a fake gethostbyname() that interfaces to the fake DNS resolver
1164 TF/06 The fix for widen_domains has also been applied to qualify_single and
1165 search_parents which are the other dnslookup options that can cause
1168 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1171 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1173 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1174 service" if it encountered an MX record with an empty target hostname.
1175 The message is now "an MX or SRV record indicated no SMTP service".
1177 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1178 if the DNS of the sending site is misconfigured. This is quite a
1179 common situation. This change restores the behaviour of treating a
1180 helo verification defer as a failure.
1182 PH/51 If self=fail was set on a router, the bounce message did not include the
1183 actual error message.
1189 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1191 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1192 command itself ended in error, the underlying message about the transport
1193 filter timeout was being overwritten with the pipe command error. Now the
1194 underlying error message should be appended to the second error message.
1196 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1198 PH/02 Reduce the amount of output that "make" produces by default. Full output
1199 can still be requested.
1201 PH/03 The warning log line about a condition test deferring for a "warn" verb
1202 was being output only once per connection, rather than after each
1203 occurrence (because it was using the same function as for successful
1204 "warn" verbs). This seems wrong, so I have changed it.
1206 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1207 it should not have, which might have caused a crash in the right
1208 circumstances, but probably never did.
1210 PH/04 Installed a modified version of Tony Finch's patch to make submission
1211 mode fix the return path as well as the Sender: header line, and to
1212 add a /name= option so that you can make the user's friendly name appear
1215 TF/03 Added the control = fakedefer ACL modifier.
1217 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1218 Mark Lowes for thorough testing.
1220 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1222 TK/03 Merged latest SRS patch from Miles Wilton.
1224 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1225 with the definition in sysexits.h (which is #included earlier).
1226 Fortunately, Exim does not actually use EX_OK. The code used to try to
1227 preserve the sysexits.h value, by assumimg that macro definitions were
1228 scanned for macro replacements. I have been disabused of this notion,
1229 so now the code just undefines EX_OK before #including unistd.h.
1231 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1232 in the smtp transport. When a block could not be written in a single
1233 write() function, the timeout was being re-applied to each part-write.
1234 This seems wrong - if the receiver was accepting one byte at a time it
1235 would take for ever. The timeout is now adjusted when this happens. It
1236 doesn't have to be particularly precise.
1238 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1239 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1241 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1242 without a domain if the check to <postmaster@domain> fails.
1244 SC/01 Eximstats: added -xls and the ability to specify output files
1245 (patch written by Frank Heydlauf).
1247 SC/02 Eximstats: use FileHandles for outputing results.
1249 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1251 SC/04 Eximstats: fixed display of large numbers with -nvr option
1253 SC/05 Eximstats: fixed merging of reports with empty tables.
1255 SC/06 Eximstats: added the -include_original_destination flag
1257 SC/07 Eximstats: removed tabs and trailing whitespace.
1259 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1261 TK/06 MBOX spool code: Add real "From " MBOX separator line
1262 so the .eml file is really in mbox format (even though
1263 most programs do not really care). Patch from Alex Miller.
1265 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1266 The latter is generated from $received_to and is only set if the
1267 message has one envelope recipient. SA can use these headers,
1268 obviously out-of-the-box. Patch from Alex Miller.
1270 PH/08 The ${def test on a variable was returning false if the variable's
1271 value was "0", contrary to what the specification has always said!
1272 The result should be true unless the variable is empty.
1274 PH/09 The syntax error of a character other than { following "${if
1275 def:variable_name" (after optional whitespace) was not being diagnosed.
1276 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1277 accidental colon was present, for example, could give incorrect results.
1279 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1280 result is used (not including appendfile, where other changes are about
1283 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1284 This involved changing a lot of size variables from int to off_t. It
1285 should work with maildirs and everything.
1287 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1288 spamd dying while we are connected to it.
1290 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1293 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1294 function for BDB 4.3.
1296 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1298 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1299 the sources for PCRE have been re-arranged and more files are now
1302 PH/15 The code I had for printing potentially long long variables in PH/11
1303 above was not the best (it lost precision). The length of off_t variables
1304 is now inspected at build time, and an appropriate printing format (%ld
1305 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1306 to be "long long int" or "long int". This is needed for the internal
1307 formatting function string_vformat().
1309 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1310 the configuration file to be ":syslog", then the script "guesses" where
1311 the logs files are, rather than using the compiled in default. In our
1312 case the guess is not the same as the compiled default, so the script
1313 suddenly stopped working when I started to use syslog. The patch checks
1314 to see if log_file_path is "". If so, it attempts to read it from exim
1315 with no configuration file to get the compiled in version, before it
1316 falls back to the previous guessing code."
1318 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1319 implementing BATV in an Exim configuration. See NewStuff for the gory
1322 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1323 Makefile that are specific to HP-UX.
1325 PH/18 If the "use_postmaster" option was set for a recipient callout together
1326 with the "random" option, the postmaster address was used as the MAIL
1327 FROM address for the random test, but not for the subsequent recipient
1328 test. It is now used for both.
1330 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1331 patch removes a few documentation additions to RFC 3028, because the
1332 latest draft now contains them. It adds the new en;ascii-case comparator
1333 and a new error check for 8bit text in MIME parts. Comparator and
1334 require names are now matched exactly. I enabled the subaddress
1335 extension, but it is not well tested yet (read: it works for me)."
1337 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1338 rework some of the code of TK/09 above to avoid the hardwired use of
1339 "%lld" and "long long". Replaced the call to snprintf() with a call to
1342 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1343 records point to non-existent hosts", "retry timeout exceeded", and
1344 "retry time not reached for any host after a long failure period".
1346 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1347 experimental DomainKeys support:
1349 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1350 (2) On an error such as an illegally used "control", the wrong name for
1351 the control was given.
1353 These problems did NOT occur unless DomainKeys support was compiled.
1355 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1357 PH/24 Added ${if match_ip condition.
1359 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1360 databases so that it will be absolutely obvious if a crash occurs in the
1361 DB library. This is a regular occurrence (often caused by mis-matched
1364 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1365 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1366 picked up on a user's system that detects such things. There doesn't seem
1367 to be a gcc warning option for this - only an attribute that has to be
1368 put on the function's prototype. It seems that in Fedora Core 4 they have
1369 set this on a number of new functions. No doubt there will be more in due
1372 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1373 specify a transport. However, if an address that was verified by such a
1374 router was the subject of a callout, Exim crashed because it tried to
1375 read the rcpt_include_affixes from the non-existent transport. Now it
1376 just assumes that the setting of that option is false. This bug was
1377 introduced by 4.51/PH/31.
1379 PH/28 Changed -d+all to exclude +memory, because that information is very
1380 rarely of interest, but it makes the output a lot bigger. People tend to
1381 do -d+all out of habit.
1383 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1384 code in os-type was giving problems when libc.so lives in lib64, like on
1387 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1388 aren't the modern standard, and it seems that some systems' include files
1389 don't always have them. Exim was already checking for some of the newer
1390 ones like T_AAAA, and defining it itself. I've added checks for all the
1391 record types that Exim uses.
1393 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1394 not automatically generating a new one, as it is supposed to. This
1395 prevented TLS from working. If the file did exist, but contained invalid
1396 data, a new version was generated, as expected. It was only the case of a
1397 non-existent file that was broken.
1399 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1400 with a change in libdomainkeys > 0.64.
1402 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1403 from DNS. If the selector record carries the flag, it now has
1404 precedence over the domain-wide flag.
1406 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1408 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1409 the use of a port name that isn't defined in /etc/services) occurred, the
1410 message was deferred as in a normal delivery, and thus remained on the
1411 spool, instead of being failed because of the mua_wrapper setting. This
1412 is now fixed, and I tidied up some of the mua_wrapper messages at the
1415 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1416 the messages in a hash of arrays rather than using individual hashes.
1417 This is a bit cleaner and results in dramatic memory savings, albeit
1418 at a slight CPU cost.
1420 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1421 as requested by Marc Sherman.
1423 SC/10 Eximstats: added histograms for user specified patterns as requested
1426 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1428 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1429 fopen() in the content-scanning modules that did not already have it.
1435 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1436 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1438 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1440 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1442 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1443 to test Sieve filters that use "vacation".
1445 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1446 that changes the way the GnuTLS parameters are stored in the cache file.
1447 The new format can be generated externally. For backward compatibility,
1448 if the data in the cache doesn't make sense, Exim assumes it has read an
1449 old-format file, and it generates new data and writes a new file. This
1450 means that you can't go back to an older release without removing the
1453 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1454 work if there are any delivery delays because "one_time" forces the
1455 parent to be marked "delivered", so its unseen clone is never tried
1456 again. For this reason, Exim now forbids the simultaneous setting of
1459 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1460 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1461 entry if you want to know the details. The fix, however, neglected to
1462 consider the case when local delivery batching is involved. The test for
1463 "previously delivered" was not happening when checking to see if an
1464 address could be batched with a previous (undelivered) one; under
1465 certain circumstances this could lead to multiple deliveries to the same
1468 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1469 in its include files, and this causes problems building Exim.
1471 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1472 header_syntax) but Exim was just ignoring anything given after a slash.
1473 In particular, this caused confusion with an attempt to use "verify =
1474 reverse_host_lookup/defer_ok". An error is now given when options are
1475 supplied for verify items that do not have them. (Maybe reverse_host_
1476 lookup should have a defer_ok option, but that's a different point.)
1478 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1479 defined by RFC 821) to 2048, because there were problems with some AUTH
1480 commands, and RFC 1869 says the size should be increased for extended
1481 SMTP commands that take arguments.
1483 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1486 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1487 "unknown" error; now it says that the functionality isn't in the binary.
1489 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1490 an address' error message when a string expansion fails (syntax or
1491 whatever). Otherwise the password may appear in the log. Following change
1492 PH/42 below, there is no longer a chance of it appearing in a bounce
1495 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1497 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1498 of its addresses was ever tried. (Bugzilla bug #2.)
1500 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1501 the result incorrectly in the debug output. (It correctly added a newline
1502 to what was transported.)
1504 TF/01 Added $received_time.
1506 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1507 commented out examples of how to interface to a virus scanner and to
1508 SpamAssassin. Also added commented examples of av_scanner and
1509 spamd_address settings.
1511 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1512 and controls are allowed in which ACLs. There were a couple of minor
1513 errors. Some of the entries in the conditions table (which is a table of
1514 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1515 negation of where the condition IS allowed.
1517 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1519 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1520 header file does not have a version number, so I've had to invent a new
1521 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1522 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1523 radiusclient), but it was contributed by a Radius user.
1525 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1526 files or directories, for OpenSSL.
1528 PH/19 When an Exim process that is running as root has to create an Exim log
1529 file, it does so in a subprocess that runs as exim:exim so as to get the
1530 ownership right at creation (otherwise, other Exim processes might see
1531 the file with the wrong ownership). There was no test for failure of this
1532 fork() call, which would lead to the process getting stuck as it waited
1533 for a non-existent subprocess. Forks do occasionally fail when resources
1534 run out. I reviewed all the other calls to fork(); they all seem to check
1537 PH/20 When checking for unexpected SMTP input at connect time (before writing
1538 the banner), Exim was not dealing correctly with a non-positive return
1539 from the read() function. If the client had disconnected by this time,
1540 the result was a log entry for a synchronization error with an empty
1541 string after "input=" when read() returned zero. If read() returned -1
1542 (an event I could not check), uninitialized data bytes were printed.
1543 There were reports of junk text (parts of files, etc) appearing after
1546 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1548 PH/22 Added support for macro redefinition, and (re)definition in between
1549 driver and ACL definitions.
1551 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1552 forgetting to use the resulting value; it was using the unexpanded value.
1554 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1555 hadn't been configured. The fix is from Juergen Kreileder, who
1556 understands it better than I do:
1558 "Here's what I see happening with three configured cyrus_sasl
1559 authenticators configured (plain, login, cram-md5):
1561 On startup auth_cyrus_sasl_init() gets called for each of these.
1562 This means three calls to sasl_listmech() without a specified mech_list.
1563 => SASL tests which mechs of all available mechs actually work
1564 => three warnings about OTP not working
1565 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1567 With the patch, sasl_listmech() also gets called three times. But now
1568 SASL's mech_list option is set to the server_mech specified in the the
1569 authenticator. Or in other words, the answer from sasl_listmech()
1570 gets limited to just the mech you're testing for (which is different
1572 => the return list contains just 'plain' or 'login', 'cram-md5' or
1573 nothing depending on the value of ob->server_mech.
1575 I've just tested the patch: Authentication still works fine,
1576 unavailable mechs specified in the exim configuration are still
1577 caught, and the auth.log warnings about OTP are gone."
1579 PH/25 When debugging is enabled, the contents of the command line are added
1580 to the debugging output, even when log_selector=+arguments is not
1583 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1584 answer is "GNU", and only if the return is "GNU/something" is the answer
1587 PH/27 $acl_verify_message is now set immediately after the failure of a
1588 verification in an ACL, and so is available in subsequent modifiers. In
1589 particular, the message can be preserved by coding like this:
1591 warn !verify = sender
1592 set acl_m0 = $acl_verify_message
1594 Previously, $acl_verify_message was set only while expanding "message"
1595 and "log_message" when a very denied access.
1597 PH/28 Modified OS/os.c-Linux with
1599 -#ifndef OS_LOAD_AVERAGE
1600 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1602 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1603 nomenclature these days.)
1605 PH/29 Installed patch from the Sieve maintainer that adds the options
1606 sieve_useraddress and sieve_subaddress to the redirect router.
1608 PH/30 In these circumstances:
1609 . Two addresses routed to the same list of hosts;
1610 . First host does not offer TLS;
1611 . First host accepts first address;
1612 . First host gives temporary error to second address;
1613 . Second host offers TLS and a TLS session is established;
1614 . Second host accepts second address.
1615 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1616 and peerdn, if requested) that were in fact used only for the second
1619 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1620 attention to any local part prefix or suffix that was matched by the
1621 router that accepted the address. It now behaves in the same way as it
1622 does for delivery: the affixes are removed from the local part unless
1623 rcpt_include_affixes is set on the transport.
1625 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1626 timeout during the DATA phase of an incoming message.
1628 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1629 applied a patch sanctioned by the Sieve maintainer.
1631 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1632 the uid or gid is negative. A case of a negative gid caused this to be
1633 noticed. The fix allows for either to be negative.
1635 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1636 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1639 PH/36 The change PH/12 above was broken. Fixed it.
1641 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1642 the grounds that routing the same address twice would always produce the
1643 same answer. This might have been true once, but it is certainly no
1644 longer true now. Routing a child address may depend on the previous
1645 routing that produced that child. Some complicated redirection strategies
1646 went wrong when messages had multiple recipients, and made Exim's
1647 behaviour dependent on the order in which the addresses were given.
1649 I have moved the duplicate checking until after the routing is complete.
1650 Exim scans the addresses that are assigned to local and remote
1651 transports, and removes any duplicates. This means that more work will be
1652 done, as duplicates will always all be routed, but duplicates are
1653 presumably rare, so I don't expect this is of any significance.
1655 For deliveries to pipes, files, and autoreplies, the duplicate checking
1656 still happens during the routing process, since they are not going to be
1659 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1660 It corrects a timeout issue with spamd. This is Ian's comment: "The
1661 background is that sometimes spamd either never reads data from a
1662 connection it has accepted, or it never writes response data. The exiscan
1663 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1664 blindly assumes that writes won't block so it may never time out."
1666 PH/39 Allow G after quota size as well as K and M.
1668 PH/40 The value set for $authenticated_id in an authenticator may not contain
1669 binary zeroes or newlines because the value is written to log lines and
1670 to spool files. There was no check on this. Now the value is run through
1671 the string_printing() function so that such characters are converted to
1672 printable escape sequences.
1674 PH/41 $message_linecount is a new variable that contains the total number of
1675 lines in the message. Compare $body_linecount, which is the count for the
1678 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1679 bounce and delay warning messages, except in certain special cases, which
1682 (a) An SMTP error message from a remote host;
1683 (b) A message specified in a :fail: redirection;
1684 (c) A message specified in a "fail" command in a system filter;
1685 (d) A message specified in a FAIL return from the queryprogram router;
1686 (e) A message specified by the cannot_route_message router option.
1688 In these cases only, Exim does include the error details in bounce and
1689 warning messages. There are also a few cases where bland messages such
1690 as "unrouteable address" or "local delivery error" are given.
1692 PH/43 $value is now also set for the "else" part of a ${run expansion.
1694 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1695 being worked on, but at least Exim now implements the latest version to
1698 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1699 process to complete was treated as a delivery failure, a timeout while
1700 writing the message to the pipe was logged, but erroneously treated as a
1701 successful delivery. Such timeouts include transport filter timeouts. For
1702 consistency with the overall process timeout, these timeouts are now
1703 treated as errors, giving rise to delivery failures by default. However,
1704 there is now a new Boolean option for the pipe transport called
1705 timeout_defer, which, if set TRUE, converts the failures into defers for
1706 both kinds of timeout. A transport filter timeout is now identified in
1709 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1710 systems where "make" and "gmake" are different, calling "gmake" at top
1711 level broke things. I've arranged for the value of $(MAKE) to be passed
1712 from the Makefile to this script so that it can call the same version of
1716 A note about Exim versions 4.44 and 4.50
1717 ----------------------------------------
1719 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1720 changes of various kinds. As a consequence, a big documentation update was
1721 needed. This delayed the release for rather longer than seemed good, especially
1722 in the light of a couple of (minor) security issues. Therefore, the changes
1723 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1724 release. So 4.44 and 4.50 are in effect two different branches that both start
1727 I have left the 4.50 change log unchanged; it contains all the changes since
1728 4.43. The change log for 4.44 is below; many of its items are identical to
1729 those for 4.50. This seems to be the most sensible way to preserve the
1730 historical information.
1736 1. Minor wording change to the doc/README.SIEVE file.
1738 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1739 computation of the current number of files was incorrect.
1741 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1742 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1745 4. Give more explanation in the error message when the command for a transport
1746 filter fails to execute.
1748 5. There are several places where Exim runs a non-Exim command in a
1749 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1750 was being done only for the command run by the queryprogram router. It is
1751 now done for all such subprocesses. The other cases are: ${run, transport
1752 filters, and the commands run by the lmtp and pipe transports.
1754 6. Added CONFIGURE_GROUP build-time option.
1756 7. Some older OS have a limit of 256 on the maximum number of file
1757 descriptors. Exim was using setrlimit() to set 1000 as a large value
1758 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1759 systems. I've change it so that if it can't get 1000, it tries for 256.
1761 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1762 was an oversight, and furthermore, ever since the addition of extra
1763 controls (e.g. 4.43/32), the checks on when to allow different forms of
1764 "control" were broken. There should now be diagnostics for all cases when a
1765 control that does not make sense is encountered.
1767 9. Added the /retain_sender option to "control=submission".
1769 10. $recipients is now available in the predata ACL (oversight).
1771 11. Tidy the search cache before the fork to do a delivery from a message
1772 received from the command line. Otherwise the child will trigger a lookup
1773 failure and thereby defer the delivery if it tries to use (for example) a
1774 cached ldap connection that the parent has called unbind on.
1776 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1777 of $address_data from the recipient verification was clobbered by the
1778 sender verification.
1780 13. The value of address_data from a sender verification is now available in
1781 $sender_address_data in subsequent conditions in the ACL statement.
1783 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1785 15. Added a new option "connect=<time>" to callout options, to set a different
1788 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1789 was its contents. (It was OK if the option was not defined at all.)
1791 17. A "Completed" log line is now written for messages that are removed from
1792 the spool by the -Mrm option.
1794 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1795 information about exactly what failed.
1797 19. Added -dd to debug only the daemon process.
1799 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1800 handles timeouts, both on the server side and network timeouts. Renamed the
1801 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1803 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1804 It is now set to "smtps".
1806 22. $host_address is now set to the target address during the checking of
1807 ignore_target_hosts.
1809 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1810 being passed; this would have caused $sender_host_name to have been used if
1811 matching the list had actually called for a host name (not very likely,
1812 since this list is usually IP addresses). A host name is now passed as
1815 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1816 code that specifies a non-restarting handler (typically sigaction() in
1817 modern systems) in an attempt to fix a rare and obscure crash bug.
1819 25. Narrowed the window for a race in the daemon that could cause it to ignore
1820 SIGCHLD signals. This is not a major problem, because they are used only to
1821 wake it up if nothing else does.
1823 26. A malformed maildirsize file could cause Exim to calculate negative values
1824 for the mailbox size or file count. Odd effects could occur as a result.
1825 The maildirsize information is now recalculated if the size or filecount
1828 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1829 support for a long time. Removed HAVE_SYS_VFS_H.
1831 28. Installed the latest version of exipick from John Jetmore.
1833 29. In an address list, if the pattern was not a regular expression, an empty
1834 subject address (from a bounce message) matched only if the pattern was an
1835 empty string. Non-empty patterns were not even tested. This was the wrong
1836 because it is perfectly reasonable to use an empty address as part of a
1837 database query. An empty address is now tested by patterns that are
1838 lookups. However, all the other forms of pattern expect the subject to
1839 contain a local part and a domain, and therefore, for them, an empty
1840 address still always fails if the pattern is not itself empty.
1842 30. Exim went into a mad DNS loop when attempting to do a callout where the
1843 host was specified on an smtp transport, and looking it up yielded more
1844 than one IP address.
1846 31. Re-factored the code for checking spool and log partition space into a
1847 function that finds that data and another that does the check. The former
1848 is then used to implement four new variables: $spool_space, $log_space,
1849 $spool_inodes, and $log_inodes.
1851 32. The RFC2047 encoding function was originally intended for short strings
1852 such as real names; it was not keeping to the 75-character limit for
1853 encoded words that the RFC imposes. It now respects the limit, and
1854 generates multiple encoded words if necessary. To be on the safe side, I
1855 have increased the buffer size for the ${rfc2047: expansion operator from
1858 33. It is now permitted to omit both strings after an "if" condition; if the
1859 condition is true, the result is "true". As before, when the second string
1860 is omitted, a false condition yields an empty string. This makes it less
1861 cumbersome to write custom ACL and router conditions.
1863 34. Failure to deliver a bounce message always caused it to be frozen, even if
1864 there was an errors_to setting on the router. The errors_to setting is now
1867 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1868 canonical form (fully expanded) before being placed in
1869 $sender_host_address.
1871 36. The table in the code that translates DNS record types into text (T_A to
1872 "A" for instance) was missing entries for NS and CNAME. It is just possible
1873 that this could have caused confusion if both these types were looked up
1874 for the same domain, because the text type is used as part of Exim's
1875 per-process caching. But the chance of anyone hitting this buglet seems
1878 37. The dnsdb lookup has been extended in a number of ways.
1880 (1) There is a new type, "zns", which walks up the domain tree until it
1881 finds some nameserver records. It should be used with care.
1883 (2) There is a new type, "mxh", which is like "mx" except that it returns
1884 just the host names, not the priorities.
1886 (3) It is now possible to give a list of domains (or IP addresses) to be
1887 looked up. The behaviour when one of the lookups defers can be
1888 controlled by a keyword.
1890 (4) It is now possible to specify the separator character for use when
1891 multiple records are returned.
1893 38. The dnslists ACL condition has been extended: it is now possible to supply
1894 a list of IP addresses and/or domains to be looked up in a particular DNS
1897 39. Added log_selector=+queue_time_overall.
1899 40. When running the queue in the test harness, wait just a tad after forking a
1900 delivery process, to get repeatability of debugging output.
1902 41. Include certificate and key file names in error message when GnuTLS fails
1903 to set them up, because the GnuTLS error message doesn't include the name
1904 of the failing file when there is a problem reading it.
1906 42. Allow both -bf and -bF in the same test run.
1908 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1910 44. The "Exiscan patch" is now merged into the mainline Exim source.
1912 45. Sometimes the final signoff response after QUIT could fail to get
1913 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1914 < 0 before doing a fflush(). This bug looks as though it goes back to the
1915 introduction of TLS in release 3.20, but "sometimes" must have been rare
1916 because the tests only now provoked it.
1918 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1919 (this can affect the format of dates).
1921 47. exim_tidydb, when checking for the continued existence of a message for
1922 which it has found a message-specific retry record, was not finding
1923 messages that were in split spool directories. Consequently, it was
1924 deleting retry records that should have stayed in existence.
1926 48. Steve fixed some bugs in eximstats.
1928 49. The SPA authentication driver was not abandoning authentication and moving
1929 on to the next authenticator when an expansion was forced to fail,
1930 contradicting the general specification for all authenticators. Instead it
1931 was generating a temporary error. It now behaves as specified.
1933 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1934 (the order specifies the preference for clients). The order is now AES256,
1935 AES128, 3DES, ARCFOUR128.
1937 51. Small patch to Sieve code - explicitly set From: when generating an
1940 52. Exim crashed if a remote delivery caused a very long error message to be
1941 recorded - for instance if somebody sent an entire SpamAssassin report back
1942 as a large number of 550 error lines. This bug was coincidentally fixed by
1943 increasing the size of one of Exim's internal buffers (big_buffer) that
1944 happened as part of the Exiscan merge. However, to be on the safe side, I
1945 have made the code more robust (and fixed the comments that describe what
1948 53. Now that there can be additional text after "Completed" in log lines (if
1949 the queue_time_overall log selector is set), a one-byte patch to exigrep
1950 was needed to allow it to recognize "Completed" as not the last thing in
1953 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1954 patch that reportedly fixes this has been added. I am not expert enough to
1955 create a test for it. This is what the patch creator wrote:
1957 "I found a little strange behaviour of ldap code when working with
1958 Windows 2003 AD Domain, where users was placed in more than one
1959 Organization Units. When I tried to give exim partial DN, the exit code
1960 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1961 But simultaneously result of request was absolutely normal ldap result,
1962 so I produce this patch..."
1964 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1965 REFERENCE, so I have modified the code to exclude the patch when that macro
1968 55. Some experimental protocols are using DNS PTR records for new purposes. The
1969 keys for these records are domain names, not reversed IP addresses. The
1970 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1971 leaves it alone. Component reversal etc. now happens only for IP addresses.
1974 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1976 57. Double the size of the debug message buffer (to 2048) so that more of very
1977 long debug lines gets shown.
1979 58. The exicyclog utility now does better if the number of log files to keep
1980 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1982 59. Two changes related to the smtp_active_hostname option:
1984 (1) $smtp_active_hostname is now available as a variable.
1985 (2) The default for smtp_banner uses $smtp_active_hostname instead
1986 of $primary_hostname.
1988 60. The host_aton() function is supposed to be passed a string that is known
1989 to be a valid IP address. However, in the case of IPv6 addresses, it was
1990 not checking this. This is a hostage to fortune. Exim now panics and dies
1991 if the condition is not met. A case was found where this could be provoked
1992 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1993 components; fortuitously, this particular loophole had already been fixed
1994 by change 4.50/55 above.
1996 If there are any other similar loopholes, the new check in host_aton()
1997 itself should stop them being exploited. The report I received stated that
1998 data on the command line could provoke the exploit when Exim was running as
1999 exim, but did not say which command line option was involved. All I could
2000 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2001 running as the user.
2004 61. There was a buffer overflow vulnerability in the SPA authentication code
2005 (which came originally from the Samba project). I have added a test to the
2006 spa_base64_to_bits() function which I hope fixes it.
2009 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2010 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2012 63. The daemon start-up calls getloadavg() while still root for those OS that
2013 need the first call to be done as root, but it missed one case: when
2014 deliver_queue_load_max is set with deliver_drop_privilege. This is
2015 necessary for the benefit of the queue runner, because there is no re-exec
2016 when deliver_drop_privilege is set.
2018 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2019 This has been fixed.
2021 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2022 was in use, was not putting the data itself into the right store pool;
2023 consequently, it could be overwritten for a subsequent message in the same
2024 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2027 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2029 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2030 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2031 the function were treating the return as a boolean value, which happened to
2032 work because 0=false and not-0=true, but is not correct code.
2034 68. The host_aton() function was not handling scoped IPv6 addresses (those
2035 with, for example, "%eth0" on the end) correctly.
2037 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2038 negated items (that is, ~something) in unsigned ints. Some compilers
2039 apparently mutter when there is no cast.
2041 70. If an address verification called from an ACL failed, and did not produce a
2042 user-specific message (i.e. there was only a "system" message), nothing was
2043 put in $acl_verify_message. In this situation, it now puts the system
2046 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2047 session; change 4.31/43 added the unwanted input to the log line - except
2048 that it did not do this in the start of session case. It now does.
2050 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2051 This is wrong and can cause the other end to generate a synchronization
2052 error if it is another Exim or anything else that does the synchronization
2053 check. A QUIT command is no longer sent after a timeout.
2055 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2056 during host lookups.
2058 74. The defer_ok option of callout verification was not working if it was used
2059 when verifying addresses in header lines, that is, for this case:
2061 verify = header_sender/callout=defer_ok
2063 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2064 those file descriptors could be used for SMTP connections. If anything
2065 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2066 could be sent to the SMTP client, causing chaos. The daemon now opens
2067 stdin, stdout, and stderr to /dev/null when it puts itself into the
2070 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2071 log by default. The user can override this with suitable Perl magic.
2073 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2074 the log message when discard triggers, was not working for the DATA ACL or
2075 for the non-SMTP ACL.
2077 78. Error message wording change in sieve.c.
2079 79. If smtp_accept_max_per_host was set, the number of connections could be
2080 restricted to fewer than expected, because the daemon was trying to set up
2081 a new connection before checking whether the processes handling previous
2082 connections had finished. The check for completed processes is now done
2083 earlier. On busy systems, this bug wouldn't be noticed because something
2084 else would have woken the daemon, and it would have reaped the completed
2087 80. If a message was submitted locally by a user whose login name contained one
2088 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2089 It caused a spool format error. I have fixed the spool reading code. A
2090 related problem was that the "from" clause in the Received: line became
2091 illegal because of the space(s). It is now covered by ${quote_local_part.
2093 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2096 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2098 83. Patch from Sieve maintainer to fix unterminated string problem in
2099 "vacation" handling.
2101 84. Some minor changes to the Linux configuration files to help with other
2102 OS variants using glibc.
2104 85. One more patch for Sieve to update vacation handling to latest spec.
2107 ----------------------------------------------------
2108 See the note above about the 4.44 and 4.50 releases.
2109 ----------------------------------------------------
2115 1. Change 4.43/35 introduced a bug that caused file counts to be
2116 incorrectly computed when quota_filecount was set in an appendfile
2119 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2120 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2123 3. Give more explanation in the error message when the command for a transport
2124 filter fails to execute.
2126 4. There are several places where Exim runs a non-Exim command in a
2127 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2128 was being done only for the command run by the queryprogram router. It is
2129 now done for all such subprocesses. The other cases are: ${run, transport
2130 filters, and the commands run by the lmtp and pipe transports.
2132 5. Some older OS have a limit of 256 on the maximum number of file
2133 descriptors. Exim was using setrlimit() to set 1000 as a large value
2134 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2135 systems. I've change it so that if it can't get 1000, it tries for 256.
2137 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2138 was an oversight, and furthermore, ever since the addition of extra
2139 controls (e.g. 4.43/32), the checks on when to allow different forms of
2140 "control" were broken. There should now be diagnostics for all cases when a
2141 control that does not make sense is encountered.
2143 7. $recipients is now available in the predata ACL (oversight).
2145 8. Tidy the search cache before the fork to do a delivery from a message
2146 received from the command line. Otherwise the child will trigger a lookup
2147 failure and thereby defer the delivery if it tries to use (for example) a
2148 cached ldap connection that the parent has called unbind on.
2150 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2151 of $address_data from the recipient verification was clobbered by the
2152 sender verification.
2154 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2155 was its contents. (It was OK if the option was not defined at all.)
2157 11. A "Completed" log line is now written for messages that are removed from
2158 the spool by the -Mrm option.
2160 12. $host_address is now set to the target address during the checking of
2161 ignore_target_hosts.
2163 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2164 being passed; this would have caused $sender_host_name to have been used if
2165 matching the list had actually called for a host name (not very likely,
2166 since this list is usually IP addresses). A host name is now passed as
2169 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2170 code that specifies a non-restarting handler (typically sigaction() in
2171 modern systems) in an attempt to fix a rare and obscure crash bug.
2173 15. Narrowed the window for a race in the daemon that could cause it to ignore
2174 SIGCHLD signals. This is not a major problem, because they are used only to
2175 wake it up if nothing else does.
2177 16. A malformed maildirsize file could cause Exim to calculate negative values
2178 for the mailbox size or file count. Odd effects could occur as a result.
2179 The maildirsize information is now recalculated if the size or filecount
2182 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2183 support for a long time. Removed HAVE_SYS_VFS_H.
2185 18. Updated exipick to current release from John Jetmore.
2187 19. Allow an empty sender to be matched against a lookup in an address list.
2188 Previously the only cases considered were a regular expression, or an
2191 20. Exim went into a mad DNS lookup loop when doing a callout where the
2192 host was specified on the transport, if the DNS lookup yielded more than
2195 21. The RFC2047 encoding function was originally intended for short strings
2196 such as real names; it was not keeping to the 75-character limit for
2197 encoded words that the RFC imposes. It now respects the limit, and
2198 generates multiple encoded words if necessary. To be on the safe side, I
2199 have increased the buffer size for the ${rfc2047: expansion operator from
2202 22. Failure to deliver a bounce message always caused it to be frozen, even if
2203 there was an errors_to setting on the router. The errors_to setting is now
2206 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2207 canonical form (fully expanded) before being placed in
2208 $sender_host_address.
2210 24. Updated eximstats to version 1.33
2212 25. Include certificate and key file names in error message when GnuTLS fails
2213 to set them up, because the GnuTLS error message doesn't include the name
2214 of the failing file when there is a problem reading it.
2216 26. Expand error message when OpenSSL has problems setting up cert/key files.
2219 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2220 (this can affect the format of dates).
2222 28. exim_tidydb, when checking for the continued existence of a message for
2223 which it has found a message-specific retry record, was not finding
2224 messages that were in split spool directories. Consequently, it was
2225 deleting retry records that should have stayed in existence.
2227 29. eximstats updated to version 1.35
2228 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2229 1.35 - bugfix such that pie charts by volume are generated correctly
2231 30. The SPA authentication driver was not abandoning authentication and moving
2232 on to the next authenticator when an expansion was forced to fail,
2233 contradicting the general specification for all authenticators. Instead it
2234 was generating a temporary error. It now behaves as specified.
2236 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2237 (the order specifies the preference for clients). The order is now AES256,
2238 AES128, 3DES, ARCFOUR128.
2240 31. Small patch to Sieve code - explicitly set From: when generating an
2243 32. Exim crashed if a remote delivery caused a very long error message to be
2244 recorded - for instance if somebody sent an entire SpamAssassin report back
2245 as a large number of 550 error lines. This bug was coincidentally fixed by
2246 increasing the size of one of Exim's internal buffers (big_buffer) that
2247 happened as part of the Exiscan merge. However, to be on the safe side, I
2248 have made the code more robust (and fixed the comments that describe what
2251 33. Some experimental protocols are using DNS PTR records for new purposes. The
2252 keys for these records are domain names, not reversed IP addresses. The
2253 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2254 leaves it alone. Component reversal etc. now happens only for IP addresses.
2257 34. The host_aton() function is supposed to be passed a string that is known
2258 to be a valid IP address. However, in the case of IPv6 addresses, it was
2259 not checking this. This is a hostage to fortune. Exim now panics and dies
2260 if the condition is not met. A case was found where this could be provoked
2261 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2262 components; fortuitously, this particular loophole had already been fixed
2263 by change 4.50/55 or 4.44/33 above.
2265 If there are any other similar loopholes, the new check in host_aton()
2266 itself should stop them being exploited. The report I received stated that
2267 data on the command line could provoke the exploit when Exim was running as
2268 exim, but did not say which command line option was involved. All I could
2269 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2270 running as the user.
2273 35. There was a buffer overflow vulnerability in the SPA authentication code
2274 (which came originally from the Samba project). I have added a test to the
2275 spa_base64_to_bits() function which I hope fixes it.
2278 36. The daemon start-up calls getloadavg() while still root for those OS that
2279 need the first call to be done as root, but it missed one case: when
2280 deliver_queue_load_max is set with deliver_drop_privilege. This is
2281 necessary for the benefit of the queue runner, because there is no re-exec
2282 when deliver_drop_privilege is set.
2284 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2285 was in use, was not putting the data itself into the right store pool;
2286 consequently, it could be overwritten for a subsequent message in the same
2287 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2290 38. Sometimes the final signoff response after QUIT could fail to get
2291 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2292 < 0 before doing a fflush(). This bug looks as though it goes back to the
2293 introduction of TLS in release 3.20, but "sometimes" must have been rare
2294 because the tests only now provoked it.
2300 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2301 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2302 Now it returns an integer. A number of calls were still expecting a T/F
2303 return. Fortuitously, in all cases, the tests worked in OK situations,
2304 which is the norm. However, things would have gone wrong on any write
2305 failures on the smtp file descriptor. This function is used when sending
2306 messages over SMTP and also when doing verify callouts.
2308 2. When Exim is called to do synchronous delivery of a locally submitted
2309 message (the -odf or -odi options), it no longer closes stderr before doing
2312 3. Implemented the mua_wrapper option.
2314 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2316 5. Implemented the functions header_remove(), header_testname(),
2317 header_add_at_position(), and receive_remove_recipient(), and exported them
2320 6. If an ACL "warn" statement specified the addition of headers, Exim already
2321 inserted X-ACL-Warn: at the start if there was no header name. However, it
2322 was not making this test for the second and subsequent header lines if
2323 there were newlines in the string. This meant that an invalid header could
2324 be inserted if Exim was badly configured.
2326 7. Allow an ACL "warn" statement to add header lines at the start or after all
2327 the Received: headers, as well as at the end.
2329 8. Added the rcpt_4xx retry error code.
2331 9. Added postmaster_mailfrom=xxx to callout verification option.
2333 10. Added mailfrom=xxxx to the callout verification option, for verify=
2336 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2337 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2339 12. Inserted some casts to stop certain compilers warning when using pointer
2340 differences as field lengths or precisions in printf-type calls (mostly
2341 affecting debugging statements).
2343 13. Added optional readline() support for -be (dynamically loaded).
2345 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2346 same clock tick as a message's arrival, so that its received time was the
2347 same as the "first fail" time on the retry record, and that message
2348 remained on the queue past the ultimate address timeout, every queue runner
2349 would try a delivery (because it was past the ultimate address timeout) but
2350 after another failure, the ultimate address timeout, which should have then
2351 bounced the address, did not kick in. This was a "< instead of <=" error;
2352 in most cases the first failure would have been in the next clock tick
2353 after the received time, and all would be well.
2355 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2356 being recognized when the domain list was tested by the match_domain
2357 condition in an expansion string.
2359 16. Added the ${str2b64: operator.
2361 17. Exim was always calling setrlimit() to set a large limit for the number of
2362 processes, without checking whether the existing limit was already
2363 adequate. (It did check for the limit on file descriptors.) Furthermore,
2364 errors from getrlimit() and setrlimit() were being ignored. Now they are
2365 logged to the main and panic logs, but Exim does carry on, to try to do its
2366 job under whatever limits there are.
2368 18. Imported PCRE 5.0.
2370 19. Trivial typo in log message " temporarily refused connection" (the leading
2373 20. If the log selector return_path_on_delivery was set and an address was
2374 redirected to /dev/null, the delivery process crashed because it assumed
2375 that a return path would always be set for a "successful" delivery. In this
2376 case, the whole delivery is bypassed as an optimization, and therefore no
2379 21. Internal re-arrangement: the function for sending a challenge and reading
2380 a response while authentication was assuming a zero-terminated challenge
2381 string. It's now changed to take a pointer and a length, to allow for
2382 binary data in such strings.
2384 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2386 23. Exim was not respecting finduser_retries when seeking the login of the
2387 uid under which it was called; it was always trying 10 times. (The default
2388 setting of finduser_retries is zero.) Also, it was sleeping after the final
2389 failure, which is pointless.
2391 24. Implemented tls_on_connect_ports.
2393 25. Implemented acl_smtp_predata.
2395 26. If the domain in control=submission is set empty, Exim assumes that the
2396 authenticated id is a complete email address when it generates From: or
2397 Sender: header lines.
2399 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2400 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2401 chown and chgrp in /bin and hostname in /usr/bin.
2403 28. Exim was keeping the "process log" file open after each use, just as it
2404 does for the main log. This opens the possibility of it remaining open for
2405 long periods when the USR1 signal hits a daemon. Occasional processlog
2406 errors were reported, that could have been caused by this. Anyway, it seems
2407 much more sensible not to leave this file open at all, so that is what now
2410 29. The long-running daemon process does not normally write to the log once it
2411 has entered its main loop, and it closes the log before doing so. This is
2412 so that log files can straightforwardly be renamed and moved. However,
2413 there are a couple of unusual error situations where the daemon does write
2414 log entries, and I had neglected to close the log afterwards.
2416 30. The text of an SMTP error response that was received during a remote
2417 delivery was being truncated at 512 bytes. This is too short for some of
2418 the long messages that one sometimes sees. I've increased the limit to
2421 31. It is now possible to make retry rules that apply only when a message has a
2422 specific sender, in particular, an empty sender.
2424 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2425 it possible to be selective about when SMTP synchronization is enforced.
2427 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2429 32. Implemented hosts_connection_nolog.
2431 33. Added an ACL for QUIT.
2433 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2436 35. Added mailbox_size and mailbox_filecount to appendfile.
2438 36. Added control = no_multiline_responses to ACLs.
2440 37. There was a bug in the logic of the code that waits for the clock to tick
2441 in the case where the clock went backwards by a substantial amount such
2442 that the microsecond fraction of "now" was more than the microsecond
2443 fraction of "then" (but the whole seconds number was less).
2445 38. Added support for the libradius Radius client library this is found on
2446 FreeBSD (previously only the radiusclient library was supported).
2452 1. When certain lookups returned multiple values in the form name=value, the
2453 quoting of the values was not always being done properly. Specifically:
2454 (a) If the value started with a double quote, but contained no whitespace,
2456 (b) If the value contained whitespace other than a space character (i.e.
2457 tabs or newlines or carriage returns) it was not quoted.
2458 This fix has been applied to the mysql and pgsql lookups by writing a
2459 separate quoting function and calling it from the lookup code. The fix
2460 should probably also be applied to nisplus, ibase and oracle lookups, but
2461 since I cannot test any of those, I have not disturbed their existing code.
2463 2. A hit in the callout cache for a specific address caused a log line with no
2464 reason for rejecting RCPT. Now it says "Previous (cached) callout
2465 verification failure".
2467 3. There was an off-by-one bug in the queryprogram router. An over-long
2468 return line was truncated at 256 instead of 255 characters, thereby
2469 overflowing its buffer with the terminating zero. As well as fixing this, I
2470 have increased the buffer size to 1024 (and made a note to document this).
2472 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2473 when Exim is waiting for an SMTP response from a remote server, Exim
2474 restarts its select() call on the socket, thereby resetting its timeout.
2475 This is not a problem when such interrupts are rare. Somebody set up a cron
2476 job to run exiwhat every 2 minutes, which is less than the normal select()
2477 timeout (5 or 10 minutes). This meant that the select() timeout never
2478 kicked in because it was always reset. I have fixed this by comparing the
2479 time when an interrupt arrives with the time at the start of the first call
2480 to select(). If more time than the timeout has elapsed, the interrupt is
2481 treated as a timeout.
2483 5. Some internal re-factoring in preparation for the addition of Sieve
2484 extensions (by MH). In particular, the "personal" test is moved to a
2485 separate function, and given an option for scanning Cc: and Bcc: (which is
2486 not set for Exim filters).
2488 6. When Exim created an email address using the login of the caller as the
2489 local part (e.g. when creating a From: or Sender: header line), it was not
2490 quoting the local part when it contained special characters such as @.
2492 7. Installed new OpenBSD configuration files.
2494 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2495 try to make them clearer.
2497 9. Callout options, other than the timeout value, were being ignored when
2498 verifying sender addresses in header lines. For example, when using
2500 verify = header_sender/callout=no_cache
2502 the cache was (incorrectly) being used.
2504 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2505 only the Cygwin environment.
2507 11. When return_path_on_delivery was set as a log selector, if different remote
2508 addresses in the same message used different return paths and parallel
2509 remote delivery occurred, the wrong values would sometimes be logged.
2510 (Whenever a remote delivery process finished, the return path value from
2511 the most recently started remote delivery process was logged.)
2513 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2514 lines when AUTH and/or TLS are in use. This is the "received protocol"
2515 field. Exim used to use "asmtp" for authenticated SMTP, without any
2516 indication (in the protocol name) for TLS use. Now it follows the RFC and
2517 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2518 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2519 names appear in log lines as well as in Received: header lines.
2521 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2522 extensions, and comparison tests, and to fix some bugs.
2524 14. Changes to the "personal" filter test:
2526 (1) The test was buggy in that it was just doing the equivalent of
2527 "contains" tests on header lines. For example, if a user's address was
2528 anne@some.where, the "personal" test would incorrectly be true for
2530 To: susanne@some.where
2532 This test is now done by extracting each address from the header in turn,
2533 and checking the entire address. Other tests that are part of "personal"
2534 are now done using regular expressions (for example, to check local parts
2535 of addresses in From: header lines).
2537 (2) The list of non-personal local parts in From: addresses has been
2538 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2539 taken from the Sieve specification recommendations.
2541 (3) If the message contains any header line starting with "List-" it is
2542 treated as non-personal.
2544 (4) The test for "circular" in the Subject: header line has been removed
2545 because it now seems ill-conceived.
2547 15. Minor typos in src/EDITME comments corrected.
2549 16. Installed latest exipick from John Jetmore.
2551 17. If headers_add on a router specified a text string that was too long for
2552 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2553 of string_sprintf() is now avoided.
2555 18. $message_body_size was not set (it was always zero) when running the DATA
2556 ACL and the local_scan() function.
2558 19. For the "mail" command in an Exim filter, no default was being set for
2559 the once_repeat time, causing a random time value to be used if "once" was
2560 specified. (If the value happened to be <= 0, no repeat happened.) The
2561 default is now 0s, meaning "never repeat". The "vacation" command was OK
2562 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2563 (I found it when inspecting the code).
2565 20. There is now an overall timeout for performing a callout verification. It
2566 defaults to 4 times the callout timeout, which applies to individual SMTP
2567 commands during the callout. The overall timeout applies when there is more
2568 than one host that can be tried. The timeout is checked before trying the
2569 next host. This prevents very long delays if there are a large number of
2570 hosts and all are timing out (e.g. when the network connections are timing
2571 out). The value of the overall timeout can be changed by specifying an
2572 additional sub-option for "callout", called "maxwait". For example:
2574 verify = sender/callout=5s,maxwait=20s
2576 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2577 to the end before writing, but this should make it even safer).
2579 22. Exim was forgetting that it had advertised PIPELINING for the second and
2580 subsequent messages on an SMTP connection. It was also not resetting its
2581 memory on STARTTLS and an internal HELO.
2583 23. When Exim logs an SMTP synchronization error within a session, it now
2584 records whether PIPELINING has been advertised or not.
2586 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2587 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2588 rather than long int.
2590 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2592 26. Added the never_mail option to autoreply.
2598 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2599 crash if the getsockname() call failed; this can happen if a connection is
2600 closed very soon after it is established. The problem was simply in the
2601 order in which certain operations were done, causing Exim to try to write
2602 to the SMTP stream before it had set up the file descriptor. The bug has
2603 been fixed by making things happen in the correct order.
2609 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2610 before the connection was closed, thus losing the rejection response.
2612 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2613 some early Solaris releases, but causes trouble in current releases where
2614 socklen_t is defined.
2616 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2619 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2622 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2623 that releasing the top of it at the end releases what was used for sub-
2624 expansions (unless the block got too big). However, discard this block if
2625 the first thing is a variable or header, so that we can use its block when
2626 it is dynamic (useful for very large $message_headers, for example).
2628 6. Lookups now cache *every* query, not just the most recent. A new, separate
2629 store pool is used for this. It can be recovered when all lookup caches are
2630 flushed. Lookups now release memory at the end of their result strings.
2631 This has involved some general refactoring of the lookup sources.
2633 7. Some code has been added to the store_xxx() functions to reduce the amount
2634 of flapping under certain conditions.
2636 8. log_incoming_interface used to affect only the <= reception log lines. Now
2637 it causes the local interface and port to be added to several more SMTP log
2638 lines, for example "SMTP connection from", and rejection lines.
2640 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2642 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2644 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2645 could be overwritten at the end of the current message (or the start of a
2646 new message if it was set in a HELO ACL). The value is now preserved for
2647 the duration of the SMTP connection.
2649 12. If a transport had a headers_rewrite setting, and a matching header line
2650 contained an unqualified address, that address was qualified, even if it
2651 did not match any rewriting rules. The underlying bug was that the values
2652 of the flags that permit the existence of unqualified sender and recipient
2653 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2654 non-local messages, and by -bnq for local messages) were not being
2655 preserved with the message after it was received.
2657 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2658 "next input=" as part of the text comprising the host identity instead of
2659 the correct text. The code was using the same buffer for two different
2660 strings. However, depending on which order the printing function evaluated
2661 its arguments, the bug did not always show up. Under Linux, for example, my
2662 test suite worked just fine.
2664 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2665 doesn't work with some older versions of Perl. It has been changed to "my",
2666 which in any case is probably the better facility to use.
2668 15. A really picky compiler found some instances of statements for creating
2669 error messages that either had too many or two few arguments for the format
2672 16. The size of the buffer for calls to the DNS resolver has been increased
2673 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2674 for addresses that have a lot of PTR records. This alleviates a problem; it
2675 does not fully solve it.
2677 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2678 buffer now truncates the list and logs the incident, which is the same
2679 action as happens when Exim is looking up a host name and its aliases.
2680 Previously in this situation something unpredictable would happen;
2681 sometimes it was "internal error: store_reset failed".
2683 18. If a server dropped the connection unexpectedly when an Exim client was
2684 using GnuTLS and trying to read a response, the client delivery process
2685 crashed while trying to generate an error log message.
2687 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2688 string, for example:
2690 warn message = H1: something\nH2: something
2692 the text was added as a single header line from Exim's point of view
2693 though it ended up OK in the delivered message. However, searching for the
2694 second and subsequent header lines using $h_h2: did not work. This has been
2695 fixed. Similarly, if a system filter added multiple headers in this way,
2696 the routers could not see them.
2698 20. Expanded the error message when iplsearch is called with an invalid key to
2699 suggest using net-iplsearch in a host list.
2701 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2702 ACLs are no longer actually imposed (and a message to that effect is
2705 22. If a "gecos" field in a passwd entry contained escaped characters, in
2706 particular, if it contained a \" sequence, Exim got it wrong when building
2707 a From: or a Sender: header from that name. A second bug also caused
2708 incorrect handling when an unquoted " was present following a character
2709 that needed quoting.
2711 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2712 was not being matched caselessly.
2714 24. Arranged for all hyphens in the exim.8 source to be escaped with
2717 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2718 properly. Recipient callout cache records were still being keyed to include
2719 the sender, even when use_sender was set false. This led to far more
2720 callouts that were necessary. The sender is no longer included in the key
2721 when use_sender is false.
2723 26. Added "control = submission" modifier to ACLs.
2725 27. Added the ${base62d: operator to decode base 62 numbers.
2727 28. dnsdb lookups can now access SRV records.
2729 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2730 the configuration file.
2732 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2733 (-v) mode. This makes the output for a verbose queue run more intelligible.
2735 31. Added a use_postmaster feature to recipient callouts.
2737 32. Added the $body_zerocount variable, containing the number of binary zero
2738 bytes in the message body.
2740 33. The time of last modification of the "new" subdirectory is now used as the
2741 "mailbox time last read" when there is a quota error for a maildir
2744 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2746 35. Added +ignore_unknown as a special item in host lists.
2748 36. Code for decoding IPv6 addresses in host lists is now included, even if
2749 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2750 address was recognized as an IP address, but was then not correctly decoded
2751 into binary, causing unexpected and incorrect effects when compared with
2758 1. Very minor rewording of debugging text in manualroute to say "list of
2759 hosts" instead of "hostlist".
2761 2. If verify=header_syntax was set, and a header line with an unqualified
2762 address (no domain) and a large number of spaces between the end of the
2763 name and the colon was received, the reception process suffered a buffer
2764 overflow, and (when I tested it) crashed. This was caused by some obsolete
2765 code that should have been removed. The fix is to remove it!
2767 3. When running in the test harness, delay a bit after writing a bounce
2768 message to get a bit more predictability in the log output.
2770 4. Added a call to search_tidyup() just before forking a reception process. In
2771 theory, someone could use a lookup in the expansion of smtp_accept_max_
2772 per_host which, without the tidyup, could leave open a database connection.
2774 5. Added the variables $recipient_data and $sender_data which get set from a
2775 lookup success in an ACL "recipients" or "senders" condition, or a router
2776 "senders" option, similar to $domain_data and $local_part_data.
2778 6. Moved the writing of debug_print from before to after the "senders" test
2781 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2782 problems for message scanning, either using a data ACL, or using
2783 local_scan() because the Received: header was not generated till after they
2784 were called (in order to set the time as the time of reception completion).
2785 I have revised the way this works. The header is now generated after the
2786 body is received, but before the ACL or local_scan() are called. After they
2787 are run, the timestamp in the header is updated.
2793 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2794 before starting a queue runner without re-exec. This happened only when
2795 deliver_drop_privilege was set or when the Exim user was set to root. The
2796 effect of the bug was that timeouts during subsequent deliveries caused
2797 crashes instead of being properly handled. The handler is now left at its
2798 default (and expected) setting.
2800 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2801 message, again when deliver_drop_privilege is set or Exim is run as root.
2802 The bug described in (1) was not present in this case, but the tidying up
2803 of the other signals was missing. I have made the two cases consistent.
2805 3. The ignore_target_hosts setting on a manualroute router was being ignored
2806 for hosts that were looked up using the /MX notation.
2808 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2811 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2812 operated on the sender address. After changing the $sender_address to <>
2813 for the sender address verify, Exim was re-instated it as the original
2814 (before rewriting) address, but remembering that it had rewritten it, so it
2815 wasn't rewriting it again. This bug also had the effect of breaking the
2816 sender address verification caching when the sender address was rewritten.
2818 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2819 This has been changed so that if the ip literal address matches
2820 ignore_target_hosts, the router declines.
2822 7. Added expansion conditions match_domain, match_address, and match_local_
2823 part (NOT match_host).
2825 8. The placeholder for the Received: header didn't have a length field set.
2827 9. Added code to Exim itself and to exim_lock to test for a specific race
2828 condition that could lead to file corruption when using MBX delivery. The
2829 issue is with the lockfile that is created in /tmp. If this file is removed
2830 after a process has opened it but before that process has acquired a lock,
2831 there is the potential for a second process to recreate the file and also
2832 acquire a lock. This could lead to two Exim processes writing to the file
2833 at the same time. The added code performs the same test as UW imapd; it
2834 checks after acquiring the lock that its file descriptor still refers to
2835 the same named file.
2837 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2838 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2841 11. Added the smtp_active_hostname option. If used, this will typically be made
2842 to depend on the incoming interface address. Because $interface_address is
2843 not set up until the daemon has forked a reception process, error responses
2844 that can happen earlier (such as "too many connections") no longer contain
2847 12. If an expansion in a condition on a "warn" statement fails because a lookup
2848 defers, the "warn" statement is abandoned, and the next ACL statement is
2849 processed. Previously this caused the whole ACL to be aborted.
2851 13. Added the iplsearch lookup type.
2853 14. Added ident_timeout as a log selector.
2855 15. Added tls_certificate_verified as a log selector.
2857 16. Added a global option tls_require_ciphers (compare the smtp transport
2858 option of the same name). This controls incoming TLS connections.
2860 17. I finally figured out how to make tls_require_ciphers do a similar thing
2861 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2862 before starting the TLS session.
2864 18. Tabs are now shown as \t in -bP output.
2866 19. If the log selector return_path_on_delivery was set, Exim crashed when
2867 bouncing a message because it had too many Received: header lines.
2869 20. If two routers both had headers_remove settings, and the first one included
2870 a superfluous trailing colon, the final name in the first list and the
2871 first name in the second list were incorrectly joined into one item (with a
2872 colon in the middle).
2878 1. Added -C and -D options to the exinext utility, mainly to make it easier
2879 to include in the automated testing, but these could be helpful when
2880 multiple configurations are in use.
2882 2. The exinext utility was not formatting the output nicely when there was
2883 an alternate port involved in the retry record key, nor when there was a
2884 message id as well (for retries that were specific to a specific message
2885 and a specific host). It was also confused by IPv6 addresses, because of
2886 the additional colons they contain. I have fixed the IPv4 problem, and
2887 patched it up to do a reasonable job for IPv6.
2889 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2890 delivery, the log line now contains "pipelined" if PIPELINING was used.
2892 4. An SMTP transport process used to panic and die if the bind() call to set
2893 an explicit outgoing interface failed. This has been changed; it is now
2894 treated in the same way as a connect() failure.
2896 5. A reference to $sender_host_name in the part of a conditional expansion
2897 that was being skipped was still causing a DNS lookup. This no longer
2900 6. The def: expansion condition was not recognizing references to header lines
2901 that used bh_ and bheader_.
2903 7. Added the _cache feature to named lists.
2905 8. The code for checking quota_filecount in the appendfile transport was
2906 allowing one more file than it should have been.
2908 9. For compatibility with Sendmail, the command line option
2916 and sets the incoming protocol and host name (for trusted callers). The
2917 host name and its colon can be omitted when only the protocol is to be set.
2918 Note the Exim already has two private options, -pd and -ps, that refer to
2919 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2920 "s", but I don't think that's a major issue.
2922 10. A number of refactoring changes to the code, none of which should affect
2925 (a) The number of logging options was getting close to filling up the
2926 32-bit word that was used as a bit map. I have split them into two classes:
2927 those that are passed in the argument to log_write(), and those that are
2928 only ever tested independently outside of that function. These are now in
2929 separate 32-bit words, so there is plenty of room for expansion again.
2930 There is no change in the user interface or the logging behaviour.
2932 (b) When building, for example, log lines, the code previously used a
2933 macro that called string_cat() twice, in order to add two strings. This is
2934 not really sufficiently general. Furthermore, there was one instance where
2935 it was actually wrong because one of the argument was used twice, and in
2936 one call a function was used. (As it happened, calling the function twice
2937 did not affect the overall behaviour.) The macro has been replaced by a
2938 function that can join an arbitrary number of extra strings onto a growing
2941 (c) The code for expansion conditions now uses a table and a binary chop
2942 instead of a serial search (which was left over from when there were very
2943 few conditions). Also, it now recognizes conditions like "pam" even when
2944 the relevant support is not compiled in: a suitably worded error message is
2945 given if an attempt is made to use such a condition.
2947 11. Added ${time_interval:xxxxx}.
2949 12. A bug was causing one of the ddress fields not to be passed back correctly
2950 from remote delivery subprocesses. The field in question was not being
2951 subsequently used, so this caused to problems in practice.
2953 13. Added new log selectors queue_time and deliver_time.
2955 14. Might have fixed a bug in maildirsizefile handling that threw up
2956 "unexpected character" debug warnings, and recalculated the data
2957 unnecessarily. In any case, I expanded the warning message to give more
2960 15. Added the message "Restricted characters in address" to the statements in
2961 the default ACL that block characters like @ and % in local parts.
2963 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2964 Three changes have been made:
2966 (a) There was a serious bug; a negative response to MAIL caused the whole
2967 recipient domain to be cached as invalid, thereby blocking all messages
2968 to all local parts at the same domain, from all senders. This bug has
2969 been fixed. The domain is no longer cached after a negative response to
2970 MAIL if the sender used is not empty.
2972 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2975 (c) A new callout option, "use_sender" has been added for people who want
2976 the modified behaviour.
2982 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2985 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2986 indeed breaks things for older releases.
2988 3. Added additional logging to the case where there is a problem reading data
2989 from a filter that is running in a subprocess using a pipe, in order to
2990 try to track down a specific problem.
2992 4. Testing facility fudge: when running in the test harness and attempting
2993 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2994 getting "No route to host". Convert this to a timeout.
2996 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2999 6. Some OS don't have socklen_t but use size_t instead. This affects the
3000 fifth argument of getsockopt() amongst other things. This is now
3001 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3002 can be set for individual OS. I have set it for SunOS5, OSF1, and
3003 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3004 some earlier ones do not.
3006 7. Change 4.30/15 was not doing the test caselessly.
3008 8. The standard form for an IPv6 address literal was being rejected by address
3009 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3010 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3011 this, as well as the form without the "IPv6" on the front (but only when
3012 address literals are enabled, of course).
3014 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3016 10. Exim crashed if a message with an empty sender address specified by -f
3017 encountered a router with an errors_to setting. This could be provoked only
3018 by a command such as
3022 where an empty string was supplied; "<>" did not hit this bug.
3024 11. Installed PCRE release 4.5.
3026 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3027 remained set. It is now erased.
3029 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3030 times from message ids (which are base 36 rather than the normal 62).
3032 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3033 were being counted as actual protocol errors, and logged if the log
3034 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3035 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3036 and DATA following a set of rejected RCPTs do not count as protocol errors.
3037 In other words, Exim assumes they were pipelined, though this may not
3038 actually be the case. Of course, in all cases the client gets an
3039 appropriate error code.
3041 15. If a lookup fails in an ACL condition, a message about the failure may
3042 be available; it is used if testing the ACL cannot continue, because most
3043 such messages specify what the cause of the deferral is. However, some
3044 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3045 that caused an old message to be retained and used if a later statement
3046 caused a defer, replacing the real cause of the deferral.
3048 16. If an IP address had so many PTR records that the DNS lookup buffer
3049 was not large enough to hold them, Exim could crash while trying to process
3050 the truncated data. It now detects and logs this case.
3052 17. Further to 4.21/58, another change has been made: if (and only if) the
3053 first line of a message (the first header line) ends with CRLF, a bare LF
3054 in a subsequent header line has a space inserted after it, so as not to
3055 terminate the header.
3057 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3058 unnecessarily, used atoi() instead of strtol(), and didn't check the
3059 termination when getting file sizes from file names by regex.
3061 19. Completely re-implemented the support for maildirsize files, in the light
3062 of a number of problems with the previous contributed implementation
3063 (4.30/29). In particular:
3065 . If the quota is zero, the maildirsize file is maintained, but no quota is
3068 . If the maildir directory does not exist, it is created before any attempt
3069 to write a maildirsize file.
3071 . The quota value in the file is just a cache; if the quota is changed in
3072 the transport, the new value overrides.
3074 . A regular expression is available for excluding directories from the
3077 20. The autoreply transport checks the characters in options that define the
3078 message's headers; it allows continued headers, but it was checking with
3079 isspace() after an embedded newline instead of explicitly looking for a
3082 21. If all the "regular" hosts to which an address was routed had passed their
3083 expiry times, and had not reached their retry times, the address was
3084 bounced, even if fallback hosts were defined. Now Exim should go on to try
3087 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3088 equivalent code in the SMTP transport. Some hosts send humungous responses
3089 to HELO/EHLO, more than 1024 it seems.
3091 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3092 gives compiler warnings in some environments. I've now done it "properly",
3095 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3096 (because of problems with the built-in one) was declared to return uschar *
3097 instead of char *, causing compiler failure.
3099 25. Fixed a file descriptor leak when processing alias/forward files.
3101 26. Fixed a minor format string issue in dbfn.c.
3103 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3105 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3106 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3109 29. When a sender address is verified, it is cached, to save repeating the test
3110 when there is more than one recipient in a message. However, when the
3111 verification involves a callout, it is possible for different callout
3112 options to be set for different recipients. It is too complicated to keep
3113 track of this in the cache, so now Exim always runs a verification when a
3114 callout is required, relying on the callout cache for the optimization.
3115 The overhead is duplication of the address routing, but this should not be
3118 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3119 to be verified with callout=postmaster, and the main callout worked but the
3120 postmaster check failed, the verification correctly failed. However, if a
3121 subsequent RCPT command asked for sender verification *without* the
3122 postmaster check, incorrect caching caused this verification also to fail,
3125 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3126 it was not caching the DNS options (qualify_single, search_parents) that
3127 were used when the lookup failed. A subsequent lookup with different
3128 options therefore always gave the same answer, though there were cases
3129 where it should not have. (Example: a "domains = !$mx_any" option on a
3130 dnslookup router: the "domains" option is always processed without any
3131 widening, but the router might have qualify_single set.) Now Exim uses the
3132 cached value only when the same options are set.
3134 32. Added John Jetmore's "exipick" utility to the distribution.
3136 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3137 than a timeout (e.g. a certificate is required, and is not provided), an
3138 Exim server now closes the connection immediately. Previously it waited for
3139 the client to close - but if the client is SSL, it seems that they each
3140 wait for each other, leading to a delay before one of them times out.
3142 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3143 maintained 0.8.x compatibility because I don't think many are using it, and
3144 it is clearly obsolete.
3146 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3149 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3150 client certificate was expired. A simple patch fixes this, though I don't
3151 understand the full logic of why the verify callback is called multiple
3154 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3155 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3156 which causes problems with some clients (such as the Certicom SSL Plus
3157 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3158 disables the coutermeasure allowing Eudora to connect."
3160 38. Exim was not checking that a write() to a log file succeeded. This could
3161 lead to Bad Things if a log got too big, in particular if it hit a file
3162 size limit. Exim now panics and dies if it cannot write to a log file, just
3163 as it does if it cannot open a log file.
3165 39. Modified OS/Makefile-Linux so that it now contains
3167 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3169 The two -D definitions ensure that Exim is compiled with large file
3170 support, which makes it possible to handle log files that are bigger than
3173 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3174 instance) a domain was checked against a named list that involved a lookup,
3175 causing $domain_data to be set, then another domain was checked against the
3176 same list, then the first domain was re-checked, the value of $domain_data
3177 after the final check could be wrong. In particular, if the second check
3178 failed, it could be set empty. This bug probably also applied to
3181 41. The strip_trailing_dot option was not being applied to the address given
3182 with the -f command-line option.
3184 42. The code for reading a message's header from the spool was incrementing
3185 $received_count, but never initializing it. This meant that the value was
3186 incorrect (doubled) while delivering a message in the same process in which
3187 it was received. In the most common configuration of Exim, this never
3188 happens - a fresh exec is done - but it can happen when
3189 deliver_drop_privilege is set.
3191 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3192 it now includes up to 150 characters of the unexpected data in the log
3195 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3196 and building data strings. The size of both of these buffers was 10 000
3197 bytes - far larger than anybody would *ever* want, thought I. Needless to
3198 say, somebody hit the limit. I have increased the maximum line length to
3199 20 000 and the maximum data length of concatenated lines to 100 000. I have
3200 also fixed two bugs, because there was no checking on these buffers. Tsk,
3201 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3202 buffer is too small.
3204 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3205 lsearch lookups. Now it does.
3207 46. When parsing a route_list item in a manualroute router, a fixed-length
3208 buffer was used for the list of hosts. I made this 1024 bytes long,
3209 thinking that nobody would ever have a list of hosts that long. Wrong.
3210 Somebody had a whole pile of complicated expansion conditions, and the
3211 string was silently truncated, leading to an expansion error. It turns out
3212 that it is easier to change to an unlimited length (owing to other changes
3213 that have happened since this code was originally written) than to build
3214 structure for giving a limitation error. The length of the item that
3215 expands into the list of hosts is now unlimited.
3217 47. The lsearch lookup could not handle data where the length of text line was
3218 more than 4095 characters. Such lines were truncated, leading to shortened
3219 data being returned. It should now handle lines of any length.
3221 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3222 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3225 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3226 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3227 no longer happens in comment lines. A list of replacements is now placed
3228 at the head of all of the source files, except those whose only change is
3229 to replace PERL_COMMAND in the very first #! line.
3231 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3232 messages on the queue, with a bottom-up merge sort, using code contributed
3233 by Michael Haardt. This should make operations like -bp somewhat faster on
3234 large queues. It won't affect queue runners, except when queue_run_in_order
3237 51. Installed eximstats 1.31 in the distribution.
3239 52. Added support for SRV lookups to the dnslookup router.
3241 53. If an ACL referred to $message_body or $message_body_end, the value was not
3242 reset for any messages that followed in the same SMTP session.
3244 54. The store-handling optimization for building very long strings was not
3245 differentiating between the different store pools. I don't think this
3246 actually made any difference in practice, but I've tidied it.
3248 55. While running the routers to verify a sender address, $sender_address
3249 was still set to the sender address. This is wrong, because when routing to
3250 send a bounce to the sender, it would be empty. Therefore, I have changed
3251 it so that, while verifying a sender address, $sender_address is set to <>.
3252 (There is no change to what happens when verifying a recipient address.)
3254 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3255 target A or AAAA records (if not already returned) without resetting the
3256 qualify_single or search_parents options of the DNS resolver. These are
3257 inappropriate in this case because the targets of MX and SRV records must
3258 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3259 target that, when qualified, matched something in the local domain. These
3260 two options are now turned off when doing these lookups.
3262 57. It seems that at least some releases of Reiserfs (which does not have the
3263 concept of a fixed number of inodes) returns zero and not -1 for the
3264 number of available inodes. This interacted badly with check_spool_inodes,
3265 which assumed that -1 was the "no such thing" setting. What I have done is
3266 to check that the total number of inodes is greater than zero before doing
3267 the test of how many are available.
3269 58. When a "warn" ACL statement has a log_message modifier, the message is
3270 remembered, and not repeated. This is to avoid a lot of repetition when a
3271 message has many recipients that cause the same warning to be written.
3272 Howewer, Exim was preserving the list of already written lines for an
3273 entire SMTP session, which doesn't seem right. The memory is now reset if a
3274 new message is started.
3276 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3277 debugging output unless log_rewrite was also set.
3279 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3280 of (int)(handle) when we know that handle contains (void *)(-1).
3282 61. The Exim daemon panic-logs an error return when it closes the incoming
3283 connection. However "connection reset by peer" seems to be common, and
3284 isn't really an error worthy of noting specially, so that particular error
3287 62. When Exim is trying to find all the local interfaces, it used to panic and
3288 die if the ioctl to get the interface flags failed. However, it seems that
3289 on at least one OS (Solaris 9) it is possible to have an interface that is
3290 included in the list of interfaces, but for which you get a failure error
3291 for this call. This happens when the interface is not "plumbed" into a
3292 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3293 failure of the "get flags" call assumes that the interface is down.
3295 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3296 makes life easier for people who are doing arithmetic on fields extracted
3297 from dates, where you often get leading zeros that should not be
3298 interpreted as octal.
3300 64. Added qualify_domain to the redirect router, to override the global
3303 65. If a pathologically long header line contained very many addresses (the
3304 report of this problem mentioned 10 000) and each of them was rewritten,
3305 Exim could use up a very large amount of memory. (It kept on making new
3306 copies of the header line as it rewrote, and never released the old ones.)
3307 At the expense of a bit more processing, the header rewriting function has
3308 been changed so that it no longer eats memory in this way.
3310 66. The generation of the Received: header has been moved from the time that a
3311 message starts to be received, to the time that it finishes. The timestamp
3312 in the Received: header should now be very close to that of the <= log
3313 line. There are two side-effects of this change:
3315 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3316 logged header lines no longer include the local Received: line, because
3317 it has not yet been created. The same applies to a copy of the message
3318 that is returned to a non-SMTP sender when a message is rejected.
3320 (b) When a filter file is tested using -bf, no additional Received: header
3321 is added to the test message. After some thought, I decided that this
3324 This change does not affect the value of $received_for. It is still set
3325 after address rewriting, but before local_scan() is called.
3327 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3329 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3330 gave an unhelpful panic error message, and a defer error. I have managed to
3331 change this behaviour so that it now rejects any supplied certificate,
3332 which seems right, as the list of acceptable certificates is empty.
3334 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3335 gave an unhelpful defer error. I have not managed to make this reject any
3336 supplied certificates, but the error message it gives is "no certificate
3337 supplied", which is not helpful.
3339 70. exigrep's output now also includes lines that are not associated with any
3340 message, but which match the given pattern. Implemented by a patch from
3341 Martin Sluka, which also tidied up the Perl a bit.
3343 71. Recipient callout verification, like sender verification, was using <> in
3344 the MAIL FROM command. This isn't really the right thing, since the actual
3345 sender may affect whether the remote host accepts the recipient or not. I
3346 have changed it to use the actual sender in the callout; this means that
3347 the cache record is now keyed on a recipient/sender pair, not just the
3348 recipient address. There doesn't seem to be a real danger of callout loops,
3349 since a callout by the remote host to check the sender would use <>.
3350 [SEE ABOVE: changed after hitting problems.]
3352 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3353 temporary errors. However, in the case of such a code being given after
3354 the end of a data transmission (i.e. after ".") Exim was failing to write
3355 a retry record for the message. (Yes, there was some broken host that was
3356 actually sending 8xx at this point.)
3358 73. An unknown lookup type in a host list could cause Exim to panic-die when
3359 the list was checked. (An example that provoked this was putting <; in the
3360 middle of a list instead of at the start.) If this happened during a DATA
3361 ACL check, a -D file could be left lying around. This kind of configuration
3362 error no longer causes Exim to die; instead it causes a defer errror. The
3363 incident is still logged to the main and panic logs.
3365 74. Buglet left over from Exim 3 conversion. The message "too many messages
3366 in one connection" was written to the rejectlog but not the mainlog, except
3367 when address rewriting (yes!) was being logged.
3369 75. Added write_rejectlog option.
3371 76. When a system filter was run not as root (that is, when system_filter_user
3372 was set), the values of the $n variables were not being returned to the
3373 main process; thus, they were not subsequently available in the $sn
3376 77. Added +return_path_on_delivery log selector.
3378 78. A connection timeout was being treated differently from recipients deferred
3379 when testing hosts_max_try with a message that was older than the host's
3380 retry timeout. (The host should not be counted, thus allowing all hosts to
3381 be tried at least once before bouncing.) This may have been the cause of an
3382 occasionally reported bug whereby a message would remain on the queue
3383 longer than the retry timeout, but would be bounced if a delivery was
3384 forced. I say "may" because I never totally pinned down the problem;
3385 setting up timeout/retry tests is difficult. See also the next item.
3387 79. The ultimate address timeout was not being applied to errors that involved
3388 a combination of host plus message (for example, a timeout on a MAIL
3389 command). When an address resolved to a number of possible hosts, and they
3390 were not all tried for each delivery (e.g. because of hosts_max_try), a
3391 message could remain on the queue longer than the retry timeout.
3393 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3396 81. Fixed an obscure SMTP outgoing bug which required at least the following
3397 conditions: (a) there was another message waiting for the same server;
3398 (b) the server returned 5xx to all RCPT commands in the first message so
3399 that the message was not completed; (c) the server dropped the connection
3400 or gave a negative response to the RSET that Exim sends to abort the
3401 transaction. The observed case was a dropped connection after DATA that had
3402 been sent in pipelining mode. That is, the server had advertised PIPELINING
3403 but was not implementing it correctly. The effect of the bug was incorrect
3404 behaviour, such as trying another host, and this could lead to a crash.
3410 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3411 and daemon.c were passed as pointers to ints; they should have been
3412 pointers to socklen_t variables (which are typically unsigned ints).
3414 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3417 3. Fixed a really odd bug that affected only the testing scheme; patching a
3418 certain fixed string in the binary changed the value of another string that
3419 happened to be identical to the end of the original first string.
3421 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3422 name", it returns that address as the IP address. On some operating
3423 systems (e.g. Solaris), it also passes back the IP address string as the
3424 "host name". However, on others (e.g. Linux), it passes back an empty
3425 string. Exim wasn't checking for this, and was changing the host name to an
3426 empty string, assuming it had been canonicized.
3428 5. Although rare, it is permitted to have more than one PTR record for a given
3429 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3430 all the names associated with an address, because they do in Solaris.
3431 However, it seems that they do not in Linux for data that comes from the
3432 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3433 I found this out when I moved to a new Linux workstation and tried to run
3434 the Exim test suite.
3436 To get round this problem I have changed the code so that it now does its
3437 own call to the DNS to look up PTR records when searching for a host name.
3438 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3439 addresses that are only in /etc/hosts are still found.
3441 This behaviour is, however, controlled by an option called host_lookup_
3442 order, which defaults to "bydns:byaddr". If people want to use the other
3443 order, or indeed, just use one or the other means of lookup, they can
3444 specify it in this variable.
3446 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3447 some operating systems, this comes back from gethostbyaddr() as an empty
3448 string, and this is what Exim used to test for. However, it seems that in
3449 other systems, "." is yielded. Exim now tests for this case too.
3451 7. The values of check_spool_space and check_log_space are now held internally
3452 as a number of kilobytes instead of an absolute number of bytes. If a
3453 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3454 kilobyte. This means that much larger values can be stored.
3456 8. Exim monitor: an attempt to get the action menu when not actually pointing
3457 at a message produces an empty menu entitled "No message selected". This
3458 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3459 no entries in it ("Shell widget menu has zero width and/or height"). So I
3460 have added a single, blank menu entry in this case.
3462 9. Added ${quote_local_part.
3464 10. MIME decoding is now applied to the contents of Subject: header lines when
3467 11. Now that a reference to $sender_host_address automatically causes a reverse
3468 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3469 host lookup before query-style lookups in lists that might use this
3470 variable. This has therefore been abolished, and the "net-" prefix is no
3471 longer necessary for query-style lookups.
3473 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3474 have been a typo for LFLAGS, so it has been changed.
3476 13. The install script calls Exim with "-C /dev/null" in order to find the
3477 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3478 to be output. Howeve, since Exim outputs its version number before the
3479 error, it didn't break the script. It just looked ugly. I fixed this by
3480 always allowing "-C /dev/null" if the caller is root.
3482 14. Ignore overlarge ACL variable number when reading spool file - insurance
3483 against a later release with more variables having written the file.
3485 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3486 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3487 this, as well as the form without the "IPv6" on the front.
3489 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3490 OS/Makefile-Darwin file.
3492 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3493 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3495 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3496 variable. However, some OS use ints for inodes. I've added cast to long int
3497 to get rid of the compiler warning.
3499 19. I had forgotten to lock out "/../" in configuration file names when
3500 ALT_CONFIG_PREFIX was set.
3502 20. Routers used for verification do not need to specify transports. However,
3503 if such a router generated a host list, and callout was configured, Exim
3504 crashed, because it could not find a port number from the (non-existent)
3505 transport. It now assumes port 25 in this circumstance.
3507 21. Added the -t option to exigrep.
3509 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3510 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3511 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3512 them is set, LOOKUP_LSEARCH is forced.
3514 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3516 24. Added sender and host information to the "rejected by local_scan()" log
3517 line; previously there was no indication of these.
3519 25. Added .include_if_exists.
3521 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3522 Linux. It turns out that not all file systems support this. Apparently some
3523 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3524 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3525 not supported on the file descriptor, is now ignored when Exim is trying to
3526 sync a directory. This applies only to Linux.
3528 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3530 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3531 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3534 29. Added support for maildirsize files from supplied patch (modified a bit).
3536 30. The use of :fail: followed by an empty string could lead Exim to respond to
3537 sender verification failures with (e.g.):
3539 550 Verification failed for <xxx>
3540 550 Sender verify failed
3542 where the first response line was missing the '-' that indicates it is not
3543 the final line of the response.
3545 31. The loop for finding the name of the user that called Exim had a hardwired
3546 limit of 10; it now uses the value of finduser_retries, which is used for
3547 all other user lookups.
3549 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3552 33. Exim was neglecting to zero errno before one call of strtol() when
3553 expanding a string and expecting an integer value. On some systems this
3554 resulted in spurious "integer overflow" errors. Also, it was casting the
3555 result into an int without checking.
3557 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3558 did not work. The code looks as if it has *never* worked, though it appears
3559 to have been documented since at least releast 1.62. I have made it work.
3561 35. The "timeout_DNS" error in retry rules, also documented since at least
3562 1.62, also never worked. As it isn't clear exactly what this means, and
3563 clearly it isn't a major issue, I have abolished the feature by treating it
3564 as "timeout", and writing a warning to the main and panic logs.
3566 36. The display of retry rules for -brt wasn't always showing the error code
3569 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3570 timeout_connect_A, timeout_connect_MX.
3572 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3573 to the empty sender.
3575 39. The daemon was not analysing the content of -oX till after it had closed
3576 stderr and disconnected from the controlling terminal. This meant that any
3577 syntax errors were only noted on the panic log, and the return code from
3578 the command was 0. By re-arranging the code a little, I've made the
3579 decoding happen first, so such errors now appear on stderr, and the return
3580 code is 1. However, the actual setting up of the sockets still happens in
3581 the disconnected process, so errors there are still only recorded on the
3584 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3585 connections (as happens on some IP stacks) was logged at start up time as
3586 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3587 it from "IPv6 and IPv4", which means that two separate sockets are being
3590 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3591 says whether AF_INET or AF_INET6 was passed as an argument.
3593 42. Exiwhat output was messed up when time zones were included in log
3596 43. Exiwhat now gives more information about the daemon's listening ports,
3597 and whether -tls-on-connect was used.
3599 44. The "port" option of the smtp transport is now expanded.
3601 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3602 silently ignored. Now an error message is written to the main and panic
3605 46. There's a new ACL modifier called "logwrite" which writes to a log file
3606 as soon as it is encountered.
3608 47. Added $local_user_uid and $local_user_gid at routing time.
3610 48. Exim crashed when trying to verify a sender address that was being
3613 49. Exim was recognizing only a space character after ".include". It now also
3614 recognizes a tab character.
3616 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3617 extracting the relevant information from the specification. The man page no
3618 longer contains scrambled data for the -d option, and I've added a section
3619 at the front about calling Exim under different names.
3621 51. Added "extra_headers" argument to the "mail" command in filter files.
3623 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3626 53. Installed eximstats 1.29.
3628 54. Added transport_filter_timeout as a generic transport option.
3630 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3631 Cc: header lines. This was required by RFC 822, but it not required by RFC
3634 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3635 incoming messages that did not have them. Now it does so only if the
3636 message originates locally, that is, if there is no associated remote host
3637 address. When Resent- header lines are present, this applies to the Resent-
3638 lines rather than the non-Resent- lines.
3640 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3641 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3643 58. Messages for configuration errors now include the name of the main
3644 configuration file - useful now that there may be more than one file in a
3645 list (.included file names were always shown).
3647 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3648 for those rare installations that do not start the daemon as root or run it
3649 setuid root. I've cut out the call to initgroups() if the daemon is not
3652 60. The Exim user and group can now be bound into the binary as text strings
3653 that are looked up at the start of Exim's processing.
3655 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3657 62. Added $mailstore_basename variable.
3659 63. Installed patch to sieve.c from Michael Haardt.
3661 64. When Exim failed to open the panic log after failing to open the main log,
3662 the original message it was trying to log was written to stderr and debug
3663 output, but if they were not available (the usual case in production), it
3664 was lost. Now it is written to syslog before the two lines that record the
3665 failures to open the logs.
3667 65. Users' Exim filters run in subprocesses under the user's uid. It is
3668 possible for a "deliver" command or an alias in a "personal" command to
3669 provoke an address rewrite. If logging of address rewriting is configured,
3670 this fails because the process is not running as root or exim. There may be
3671 a better way of dealing with this, but for the moment (because 4.30 needs
3672 to be released), I have disabled address rewrite logging when running a
3673 filter in a non-root, non-exim process.
3679 1. The buildconfig auxiliary program wasn't quoting the value set for
3680 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3681 not defined. This bug was masked in 4.22 by the effect that was fixed in
3684 2. Some messages that were rejected after a message id was allocated were
3685 shown as "incomplete" by exigrep. It no longer does this for messages that
3686 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3688 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3689 have allow_domain_literals set, the ID did not get logged in the <= line.
3690 Domain literals are now always recognized in Message-ID: header lines.
3692 4. The first argument for a ${extract expansion item is the key name or field
3693 number. Leading and trailing spaces in this item were not being ignored,
3694 causing some misleading effects.
3696 5. When deliver_drop_privilege was set, single queue runner processes started
3697 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3698 same command in the process it spins off) were not dropping privilege.
3700 6. When the daemon running as "exim" started a queue runner, it always
3701 re-executed Exim in the spun-off process. This is a waste of effort when
3702 deliver_drop_privilege is set. The new process now just calls the
3703 queue-runner function directly.
3709 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3712 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3713 ignored. Though the use of -oP was forcing the writing of a pid file, it
3714 was always written to the default place.
3716 3. If the message "no IP address found for host xxxx" is generated during
3717 incoming verification, it is now followed by identification of the incoming
3718 connection (so you can more easily find what provoked it).
3720 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3722 5. Added some features to "harden" Exim a bit more against certain attacks:
3724 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3725 be put in Local/Makefile. This is like the never_users runtime option,
3726 but it cannot be overridden. The default setting is "root".
3728 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3729 prefix string with which any file named in a -C command line option
3732 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3733 is retained for -C and -D only if the caller of Exim is root. Without
3734 it, the exim user may also use -C and -D and retain privilege.
3736 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3737 command line option is disabled.
3739 6. Macro names set by the -D option must start with an upper case letter, just
3740 like macro names defined in the configuration file.
3742 7. Added "dereference=" facility to LDAP.
3744 8. Two instances of the typo "uknown" in the source files are fixed.
3746 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3747 the Configure-Makefile script screwed up while processing it.
3749 10. Incorporated PCRE 4.4.
3751 11. The SMTP synchronization check was not operating right at the start of an
3752 SMTP session. For example, it could not catch a HELO sent before the client
3753 waited for the greeting. There is now a check for outstanding input at the
3754 point when the greeting is written. Because of the duplex, asynchronous
3755 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3756 way, but not yet received, when the check is performed.
3758 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3759 on TCP/IP sockets, because this apparently causes some broken clients to
3762 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3763 unchanged) from the Cygwin maintainer.
3765 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3766 was supported instead of testing for mbx. Effectively a typo.
3768 15. The spa authenticator server code was not checking that the input it
3769 received was valid base64.
3771 16. The debug output line for the "set" modifier in ACLs was not showing the
3772 name of the variable that was being set.
3774 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3776 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3777 lookup on its own. Something else was needed to trigger the lookup. For
3778 example, a match in host_lookup or the need for a host name in a host list.
3779 Now, if $sender_host_name is referenced and the host name has not yet been
3780 looked up, a lookup is performed. If the lookup fails, the variable remains
3781 empty, and $host_lookup_failed is set to "1".
3783 19. Added "eqi" as a case-independent comparison operator.
3785 20. The saslauthd authentication condition could segfault if neither service
3786 nor realm was specified.
3788 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3789 error message that was logged was misleading, and incoming SMTP
3790 connections were dropped. The message is now more accurate, and temporary
3791 errors are given to SMTP connections.
3793 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3794 (except RSET) with a 421 error, until QUIT is received. However, it was
3795 failing to send a response to QUIT.
3797 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3798 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3799 ACL is now run after the helo_try_verify_hosts code.
3801 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3802 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3803 case-independent, so other case variants are also recognized). Apparently
3804 some systems use these upper case variants.
3806 25. If more than two messages were waiting for the same host, and a transport
3807 filter was specified for the transport, Exim sent two messages over the
3808 same TCP/IP connection, and then failed with "socket operation on non-
3809 socket" when it tried to send the third.
3811 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3813 27. The extern definition of crypt16() in expand.c was not being excluded when
3814 the OS had its own crypt16() function.
3816 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3817 as a preferred synonym for return_size_limit, both as an option and as an
3820 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3822 30. Changed the default configuration ACL to relax the local part checking rule
3823 for addresses that are not in any local domains. For these addresses,
3824 slashes and pipe symbols are allowed within local parts, but the sequence
3825 /../ is explicitly forbidden.
3827 31. SPA server authentication was not clearing the challenge buffer before
3830 32. log_message in a "warn" ACL statement was writing to the reject log as
3831 well as to the main log, which contradicts the documentation and doesn't
3832 seem right (because no rejection is happening). So I have stopped it.
3834 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3835 However, I am unable to do any testing of this.
3837 34. Fixed an infelicity in the appendfile transport. When checking directories
3838 for a mailbox, to see if any needed to be created, it was accidentally
3839 using path names with one or more superfluous leading slashes; tracing
3840 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3842 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3843 contents are added to the log line that is written for every discarded
3844 recipient. (Previously a log_message setting was ignored.)
3846 36. The ${quote: operator now quotes the string if it is empty.
3848 37. The install script runs exim in order to find its version number. If for
3849 some reason other than non-existence or emptiness, which it checks, it
3850 could not run './exim', it was installing it with an empty version number,
3851 i.e. as "exim-". This error state is now caught, and the installation is
3854 38. An argument was missing from the function that creates an error message
3855 when Exim fails to connect to the socket for saslauthd authentication.
3856 This could cause Exim to crash, or give a corrupted message.
3858 39. Added isip, isip4, and isip6 to ${if conditions.
3860 40. The ACL variables $acl_xx are now saved with the message, and can be
3861 accessed later in routers, transports, and filters.
3863 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3864 strings in the file are not string-expanded.
3866 42. If a MAIL command specified a SIZE value that was too large to fit into an
3867 int variable, the check against message_size_limit failed. Such values are
3868 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3869 day this will have to be increased, but I don't think I want to be around
3870 when emails are that large.
3877 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3878 iconv() is not standard in FreeBSD.
3880 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3881 IPv6 enabled. The observed symptom was a segmentation fault on return from
3882 the function os_common_find_running_interfaces() in src/os.c.
3884 3. In the check_special_case() function in daemon.c I had used "errno" as an
3885 argument name, which causes warnings on some systems. This was basically a
3886 typo, since it was named "eno" in the comments!
3888 4. The code that waits for the clock to tick (at a resolution of some fraction
3889 of a second) so as to ensure message-id uniqueness was always waiting for
3890 at least one whole tick, when it could have waited for less. [This is
3891 almost certainly not relevant at current processor speeds, where it is
3892 unlikely to ever wait at all. But we try to future-proof.]
3894 5. The function that sleeps for a time interval that includes fractions of a
3895 second contained a race. It did not block SIGALRM between setting the
3896 timer, and suspending (a couple of lines later). If the interval was short
3897 and the sigsuspend() was delayed until after it had expired, the suspension
3898 never ended. On busy systems this could lead to processes getting stuck for
3901 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3902 process, before it forks any delivery processes. The open lookup caching
3903 mechanism meant that the open file or database connection was passed into
3904 the delivery process. The problem was that delivery processes always tidy
3905 up cached lookup data. This could cause a problem for the next delivery
3906 process started by the queue runner, because the external queue runner
3907 process does not know about the closure. So the next delivery process
3908 still has data in the lookup cache. In the case of a file lookup, there was
3909 no problem because closing a file descriptor in a subprocess doesn't affect
3910 the parent. However, if the lookup was caching a connection to a database,
3911 the connection was closed, and the second delivery process was likely to
3912 see errors such as "PGSQL: query failed: server closed the connection
3913 unexpectedly". The problem has been fixed by closing all cached lookups
3914 in a queue runner before running a delivery process.
3916 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3917 seem to have the "const" qualifier which it has on other OS. I've
3920 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3921 *of the same type* (client or server) with the same public name that an
3922 error should be diagnosed.
3924 9. When Exim looked up a host name for an IP address, but failed to find the
3925 original IP address when looking up the host name (a safety check), it
3926 output the message "<ip address> does not match any IP for NULL", which was
3927 confusing, to say the least. The bug was that the host name should have
3928 appeared instead of "NULL".
3930 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3931 user that is built into the binary, and the -C or -D options is used, root
3932 privilege is dropped before the configuration file is read. In addition,
3933 logging is switched to stderr instead of the normal log files. If the
3934 configuration then re-defines the Exim user, the unprivileged environment
3935 is probably not what is expected, so Exim logs a panic warning message (but
3938 However, if deliver_drop_privilege is set, the unprivileged state may well
3939 be exactly what is intended, so the warning has been cut out in that case,
3940 and Exim is allowed to try to write to its normal log files.
3946 1. smtp_return_error_details was not giving details for temporary sender
3947 or receiver verification errors.
3949 2. Diagnose a configuration error if two authenticators have the same public
3952 3. Exim used not to create the message log file for a message until the first
3953 delivery attempt. This could be confusing when incoming messages were held
3954 for policy or load reasons. The message log file is now created at the time
3955 the message is received, and an initial "Received" line is written to it.
3957 4. The automatically generated man page for command line options had a minor
3958 bug that caused no ill effects; however, a more serious problem was that
3959 the procedure for building the man page automatically didn't always
3960 operate. Consequently, release 4.20 contains an out-of-date version. This
3961 shouldn't happen again.
3963 5. When building Exim with embedded Perl support, the script that builds the
3964 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3965 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3967 6. The freeze_tell option was not being used for messages that were frozen on
3968 arrival, either by an ACL or by local_scan().
3970 7. Added the smtp_incomplete_transaction log selector.
3972 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3973 was accepting AUTH without a new EHLO.
3975 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3976 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3979 10. Logging of TCP/IP connections (when configured) now happens in the main
3980 daemon process instead of the child process, so that the TCP/IP connection
3981 count is more accurate (but it can never be perfect).
3983 11. The use of "drop" in a nested ACL was not being handled correctly in the
3984 outer ACL. Now, if condition failure induced by the nested "drop" causes
3985 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3986 or "require"), the connection is dropped.
3988 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3989 that yield "discard" can now be used with an "accept" or a "discard" verb,
3990 but an error is generated for any others (because I can't see a useful way
3991 to define what should happen).
3993 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3994 are now processed in the same way as lines in the Exim configuration file.
3995 In particular, continuation lines are supported.
3997 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3999 15. Added -ti meaning -t -i.
4001 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4002 domains, and warn by logging if others are found.
4004 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4005 returned from GIFCONF when Exim is trying to find the list of interfaces on
4006 a host. The code in os.c has been modified to copy each ifreq to an aligned
4007 structure in all cases.
4009 Also, in some cases, the returned ifreq's were being copied to a 'struct
4010 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4011 means the last couple of bytes of an IPv6 address could be chopped if the
4012 ifreq contained only a normal sockaddr (14 bytes storage).
4014 18. Named domain lists were not supported in the hosts_treat_as_local option.
4015 An entry such as +xxxx was not recognized, and was treated as a literal
4018 19. Ensure that header lines added by a DATA ACL are included in the reject log
4019 if the ACL subsequently rejects the message.
4021 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4022 MD5 (which is deprecated).
4024 21. When testing a filter file using -bf, Exim was writing a message when it
4025 took the sender from a "From " line in the message, but it was not doing so
4026 when it took $return_path from a Return-Path: header line. It now does.
4028 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4029 with a valid header line field name (a series of printing characters
4030 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4032 23. Changed "disc" in the source to "disk" to conform to the documentation and
4033 the book and for uniformity.
4035 24. Ignore Sendmail's -Ooption=value command line item.
4037 25. When execve() failed while trying to run a command in a pipe transport,
4038 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4039 could be confused with a return value of 69 from the command itself. This
4040 has been changed to 127, the value the shell returns if it is asked to run
4041 a non-existent command. The wording for the related log line suggests a
4042 non-existent command as the problem.
4044 26. If received_header_text expands to an empty string, do not add a Received:
4045 header line to the message. (Well, it adds a token one on the spool, but
4046 marks it "old" so that it doesn't get used or transmitted.)
4048 27. Installed eximstats 1.28 (addition of -nt option).
4050 28. There was no check for failure on the call to getsockname() in the daemon
4051 code. This can fail if there is a shortage of resources on the system, with
4052 ENOMEM, for example. A temporary error is now given on failure.
4054 29. Contrary to the C standard, it seems that in some environments, the
4055 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4056 program. Exim now does this explicitly; it affects the formatting of
4057 timestamps using strftime().
4059 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4060 complaints. I've now initialized all the variables, to avoid this.
4062 32. Header lines added by a system filter were not being "seen" during
4063 transport-time rewrites.
4065 33. The info_callback() function passed to OpenSSL is set up with type void
4066 (*)(SSL *, int, int), as described somewhere. However, when calling the
4067 function (actually a macro) that sets it up, the type void(*)() is
4068 expected. I've put in a cast to prevent warnings from picky compilers.
4070 34. If a DNS black list lookup found a CNAME record, but there were no A
4071 records associated with the domain it pointed at, Exim crashed.
4073 35. If a DNS black list lookup returned more than one A record, Exim ignored
4074 all but the first. It now scans all returned addresses if a particular IP
4075 value is being sought. In this situation, the contents of the
4076 $dnslist_value variable are a list of all the addresses, separated by a
4079 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4080 to accept a host name and all its aliases if the forward lookup for any of
4081 them yielded the IP address of the incoming connection. Now it accepts only
4082 those names whose forward lookup yields the correct IP address. Any other
4083 names are discarded. This closes a loophole whereby a rogue DNS
4084 administrator could create reverse DNS records to break through a
4085 wildcarded host restriction in an ACL.
4087 37. If a user filter or a system filter that ran in a subprocess used any of
4088 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4089 the wrong values were passed to the pipe command ($thisaddress had the
4090 value of $0, $0 had the value of $1, etc). This bug was introduced by
4091 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4093 38. Improved the line breaking for long SMTP error messages from ACLs.
4094 Previously, if there was no break point between 40 and 75 characters, Exim
4095 left the rest of the message alone. Two changes have been made: (a) I've
4096 reduced the minimum length to 35 characters; (b) if it can't find a break
4097 point between 35 and 75 characters, it looks ahead and uses the first one
4098 that it finds. This may give the occasional overlong line, but at least the
4099 remaining text gets split now.
4101 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4102 file descriptors might be low, and that setting 1000 would always raise it.
4103 It turns out that in some environments, the limit is already over 1000 and
4104 that lowering it causes trouble. So now Exim takes care not to decrease it.
4106 40. When delivering a message, the value of $return_path is set to $sender_
4107 address at the start of routing (routers may change the value). By an
4108 oversight, this default was not being set up when an address was tested by
4109 -bt or -bv, which affected the outcome if any router or filter referred to
4112 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4113 log only when "message" or "log_message" are set. However, if one of the
4114 conditions was an address verification, or a call to a nested ACL, the
4115 messages generated by the underlying test were being passed through. This
4116 no longer happens. The underlying message is available in $acl_verify_
4117 message for both "message" and "log_message" expansions, so it can be
4118 passed through if needed.
4120 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4121 new expansion $bh_ to give the encoded byte string without charset
4122 translation. Translation happens only if iconv() is available; HAVE_ICONV
4123 indicates this at build time. HEADERS_CHARSET gives the charset to
4124 translate to; headers_charset can change it in the configuration, and
4125 "headers charset" can change it in an individual filter file.
4127 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4128 that creates RFC 2047 encoded "words" labels them as that charset instead
4129 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4130 expansion operator; (ii) when Exim creates a From: line for a local
4131 message; (iii) when a header line is rewritten to include a "phrase" part.
4133 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4134 buggy, causing it to skip the first lines of messages whose message ID
4135 ended in 'D'. This would not have bitten before Exim release 4.14, because
4136 message IDs were unlikely to end in 'D' before then. The effect was to have
4137 incorrect size information for certain domains.
4139 45. #include "config.h" was missing at the start of the crypt16.c module. This
4140 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4143 46. If there was a timeout during a "random" callout check, Exim treated it as
4144 a failure of the random address, and carried on sending RSET and the real
4145 address. If the delay was just some slowness somewhere, the response to the
4146 original RCPT would be taken as a response to RSET and so on, causing
4147 mayhem of various kinds.
4149 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4150 when I implemented it. It didn't allow for the fact that some option values
4151 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4152 the right test for positive values.
4154 48. Domain names in DNS records are case-independent. Exim always looks them up
4155 in lower case. Some resolvers return domain names in exactly the case they
4156 appear in the zone file, that is, they may contain uppercase letters. Not
4157 all resolvers do this - some return always lower case. Exim was treating a
4158 change of case by a resolver as a change of domain, similar to a widening
4159 of a domain abbreviation. This triggered its re-routing code and so it was
4160 trying to route what was effectively the same domain again. This normally
4161 caused routing to fail (because the router wouldn't handle the domain
4162 twice). Now Exim checks for this case specially, and just changes the
4163 casing of the domain that it ultimately uses when it transmits the message
4166 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4169 50. If a filter generated a file delivery with a non-absolute name (possible if
4170 no home directory exists for the router), the forbid_file option was not
4173 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4174 the existing equality matching.
4176 52. Exim was using ints instead of ino_t variables in some places where it was
4177 dealing with inode numbers.
4179 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4180 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4181 called TMPDIR, and if it finds it is different, it changes its value.
4183 54. The smtp_printf() function is now made available to local_scan() so
4184 additional output lines can be written before returning. There is also an
4185 smtp_fflush() function to enable the detection of a dropped connection.
4186 The variables smtp_input and smtp_batched_input are exported to
4189 55. Changed the default runtime configuration: the message "Unknown user"
4190 has been removed from the ACL, and instead placed on the localuser router,
4191 using the cannot_route_message feature. This means that any verification
4192 failures that generate their own messages won't get overridden. Similarly,
4193 the "Unrouteable address" message that was in the ACL for unverifiable
4194 relay addresses has also been removed.
4196 56. Added hosts_avoid_esmtp to the smtp transport.
4198 57. The exicyclog script was not checking for the esoteric option
4199 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4200 will work only if exicyclog is run under the appropriate euid.
4202 58. Following a discussion on the list, the rules by which Exim recognises line
4203 endings on incoming messages have been changed. The -dropcr and drop_cr
4204 options are now no-ops, retained only for backwards compatibility. The
4205 following line terminators are recognized: LF CRLF CR. However, special
4206 processing applies to CR:
4208 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4209 nor a local message in the state where . is a terminator.
4211 (ii) If a bare CR is encountered in a header line, an extra space is added
4212 after the line terminator so as not to end the header. The reasoning
4213 behind this is that bare CRs in header lines are most likely either
4214 to be mistakes, or people trying to play silly games.
4216 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4217 was being incorrectly given as 18 bytes larger than it should have been.
4218 This is a VOB (very old bug).
4220 60. This may never have affected anything current, but just in case it has:
4221 When the local host is found other than at the start of a list of hosts,
4222 the local host, those with the same MX, and any that follow, are discarded.
4223 When the list in question was part of a longer list of hosts, the following
4224 hosts (not currently being processed) were also being discarded. This no
4225 longer happens. I'm not sure if this situation could ever has previously
4228 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4231 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4232 header. This is something that is recommended in a new Internet Draft, and
4233 is something that is documented as being done by Sendmail. There are two
4234 possible values. For messages generated by the autoreply transport, Exim
4237 Auto-Submitted: auto-replied
4239 whereas for all other generated messages (e.g. bounces) it adds
4241 Auto-Submitted: auto-generated
4243 63. The "personal" condition in filters now includes a test for the
4244 Auto-Submitted: header. If it contains the string "auto-" the message it
4245 not considered personal.
4247 64. Added rcpt_include_affixes as a generic transport option.
4249 65. Added queue_only_override (default true).
4251 66. Added the syslog_duplication option.
4253 67. If what should have been the first header line of a message consisted of
4254 a space followed by a colon, Exim was mis-interpreting it as a header line.
4255 It isn't of course - it is syntactically invalid and should therefore be
4256 treated as the start of the message body. The misbehaviour could have
4257 caused a number of strange effects, including loss of data in subsequent
4258 header lines, and spool format errors.
4260 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4261 client host had authenticated. This control can now be exercised by an ACL
4262 for more flexibility.
4264 69. By default, callouts do not happen when testing with -bh. There is now a
4265 variant, -bhc, which does actually run the callout code, including
4266 consulting and updating the callout cache.
4268 70. Added support for saslauthd authentication, courtesy of Alexander
4271 71. If statvfs() failed on the spool or log directories while checking their
4272 size for availability, Exim confusingly gave the error "space shortage".
4273 Furthermore, in debugging mode it crashed with a floating point exception.
4274 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4275 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4276 serious problem, Exim now writes to the main and panic logs when this
4277 happens, with details of the failure. It then refuses to accept the
4278 incoming message, giving the message "spool directory problem" or "log
4279 directory problem" with a 421 code for SMTP messages.
4281 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4282 0, 1, and 2 exist, because some OS complain for execs without them (see
4283 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4284 descriptors. However, the code omitted to check that the open succeeded,
4285 causing mysterious errors if for some reason the permissions on /dev/null
4286 got screwed. Now Exim writes a message to the main and panic logs, and
4287 bombs out if it can't open /dev/null.
4289 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4290 interact so that it is all more flexible. It is supposed to remain
4291 backwards compatible. Also added extra_local_interfaces.
4293 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4294 to bomb out with an assertion failure - to the client this appears as a
4295 connection drop. This problem occurs in the part of the code that was taken
4296 from the Samba project. Fortunately, the assertion is in a very simple
4297 function, so I have fixed this by reproducing the function inline in the
4298 one place where it is called, and arranging for authentication to fail
4299 instead of killing the process with assert().
4301 75. The SPA client code was not working when the server requested OEM rather
4302 than Unicode encoding.
4304 76. Added code to make require_files with a specific uid setting more usable in
4305 the case where statting the file as root fails - usually a non-root-mounted
4306 NFS file system. When this happens and the failure is EACCES, Exim now
4307 forks a subprocess and does the per-uid checking as the relevant uid.
4309 77. Added process_log_path.
4311 78. If log_file_path was not explicitly set, a setting of check_log_space or
4312 check_log_inodes was ignored.
4314 79. If a space check for the spool or log partitions fails, the incident is now
4315 logged. Of course, in the latter case the data may get lost...
4317 80. Added the %p formatting code to string_format() so that it can be used to
4318 print addresses in debug_print(). Adjusted all the address printing in the
4319 debugging in store.c to use %p rather than %d.
4321 81. There was a concern that a line of code in smtp_in.c could overflow a
4322 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4323 initially expressed, the concern was not well-founded, because trailing
4324 spaces are removed early. However, if the trailing spaces were followed by
4325 a NULL, they did not get removed, so the overflow was possible. Two fixes
4328 (a) I re-wrote the offending code in a cleaner fashion.
4329 (b) If an incoming SMTP command contains a NULL character, it is rejected
4332 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4333 runs initgroups(), so that if the Exim user is in any additional groups,
4334 they will be used during message reception.
4340 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob