1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.427 2006/11/07 14:13:18 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.
220 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
221 in ${readsocket because some servers need this prod.
223 PH/32 Added some extra debug output when updating a wait-xxx database.
225 PH/33 The hint "could be header name not terminated by colon", which has been
226 given for certain expansion errors for a long time, was not being given
227 for the ${if def:h_colon_omitted{... case.
229 PH/34 The spec says: "With one important exception, whenever a domain list is
230 being scanned, $domain contains the subject domain." There was at least
231 one case where this was not true.
233 PH/35 The error "getsockname() failed: connection reset by peer" was being
234 written to the panic log as well as the main log, but it isn't really
235 panic-worthy as it just means the connection died rather early on. I have
236 removed the panic log writing for the ECONNRESET error when getsockname()
239 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
240 runs only) independently of the message's sender address. This meant
241 that, if the 4xx error was in fact related to the sender, a different
242 message to the same recipient with a different sender could confuse
243 things. In particualar, this can happen when sending to a greylisting
244 server, but other circumstances could also provoke similar problems.
245 I have changed the default so that the retry time for these errors is now
246 based a combination of the sender and recipient addresses. This change
247 can be overridden by setting address_retry_include_sender=false in the
250 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
251 remote server are returned as part of bounce messages. This was not
252 happening for LMTP over a pipe (the lmtp transport), but now it is the
253 same for both kinds of LMTP.
255 PH/38 Despite being documented as not happening, Exim was rewriting addresses
256 in header lines that were in fact CNAMEs. This is no longer the case.
262 SC/01 Use a glob alias rather than an array ref in eximstats generated
263 parser. This improves both readability and performance.
265 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
266 Don't display local sender or destination tables in eximstats unless
267 there is data to show.
268 Added average volumes into the eximstats top table text output.
270 SC/03 Collect data on the number of addresses (recipients) as well
271 as the number of messages in eximstats.
273 TF/01 Correct an error in the documentation for the redirect router. Exim
274 does (usually) call initgroups() when daemonizing.
276 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
277 with consistent privilege compared to when running as a daemon.
279 TF/03 Note in the spec that $authenticated_id is not set for local
280 submissions from trusted users.
282 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
283 Thanks to Dean Brooks <dean@iglou.com> for the patch.
285 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
286 by adding some example configuration directives to the default
287 configuration file. A little bit of work is required to uncomment the
288 directives and define how usernames and passwords are checked, but
289 there is now a framework to start from.
291 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
292 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
293 without this. I don't know how relevant this is to other LDAP libraries.
295 PH/02 Add the verb name to the "unknown ACL verb" error.
297 PH/03 Magnus Holmgren's patch for filter_prepend_home.
299 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
301 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
302 directory not expanded when it should be if an expanded home directory
303 was set for the address (which is overridden by the transport).
305 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
308 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
309 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
310 because it is too late at that time, and has no effect.
312 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
313 security issue with \' (bugzilla #107). I could not use the
314 PQescapeStringConn() function, because it needs a PGconn value as one of
317 PH/08 When testing addresses using -bt, indicate those final addresses that
318 are duplicates that would not cause an additional delivery. At least one
319 person was confused, thinking that -bt output corresponded to deliveries.
320 (Suppressing duplicates isn't a good idea as you lose the information
321 about possibly different redirections that led to the duplicates.)
323 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
324 systems where poll() doesn't work, in particular OS X.
326 PH/10 Added more information to debugging output for retry time not reached.
328 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
329 operations in malware.c.
331 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
334 PH/13 If write_rejectlog was set false when logging was sent to syslog with
335 syslog_duplication set false, log lines that would normally be written
336 both the the main log and to the reject log were not written to syslog at
339 PH/14 In the default configuration, change the use of "message" in ACL warn
340 statements to "add_header".
342 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
343 not followed by a command (e.g. "seen endif").
345 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
346 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
349 PH/17 Added extra conditions to the default value of delay_warning_condition
353 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
354 { match{$h_precedence:}{(?i)bulk|list|junk} } \
355 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
358 The Auto-Submitted: and various List- headers are standardised, whereas I
359 don't think Precedence: ever was.
361 PH/18 Refactored debugging code in route_finduser() to show more information,
362 in particular, the error code if getpwnam() issues one.
364 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
365 This is apparently needed in addition to the PH/07 change above to avoid
366 any possible encoding problems.
368 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
369 but not after initializing Perl.
371 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
372 output them only if debugging. By default they are written stderr,
373 apparently, which is not desirable.
375 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
378 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
381 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
383 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
384 authenticated or an ident call has been made. Suppress the default
385 values for $authenticated_id and $authenticated_sender (but permit -oMai
386 and -oMas) when testing with -bh.
388 PH/24 Re-jigged the order of the tests in the default configuration so that the
389 tests for valid domains and recipients precede the DNS black list and CSA
390 tests, on the grounds that those ones are more expensive.
392 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
393 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
394 This bug exists in every version of Exim that I still have, right back to
397 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
398 However, an attempt to turn on case-sensitivity in a regex key by
399 including (?-i) didn't work because the subject string was already
400 lowercased, and the effects were non-intuitive. It turns out that a
401 one-line patch can be used to allow (?-i) to work as expected.
407 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
408 other effects) broke the use of negated acl sub-conditions.
410 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
413 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
414 "Deny" causes Exim to reject the incoming connection with a 554 error.
415 Unfortunately, if there is a major crisis, such as a disk failure,
416 tcp-wrappers gives "deny", whereas what one would like would be some
417 kind of temporary error. A kludge has been added to help with this.
418 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
419 554 error is used if errno is still zero or contains ENOENT (which occurs
420 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
423 PH/03 Add -lutil to the default FreeBSD LIBS setting.
425 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
426 errors. Otherwise a message that provokes a temporary error (when other
427 messages do not) can cause a whole host to time out.
429 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
430 addresses were routed directly to files or pipes from a redirect router.
431 File deliveries just didn't batch; pipe deliveries might have suffered
434 PH/06 A failure to get a lock for a hints database would erroneously always say
435 "Failed to get write lock", even when it was really a read lock.
437 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
438 of 0600. This has been changed to use the value of the lockfile_mode
439 option (which defaults to 0600).
441 PH/08 Applied small patch from the Sieve maintainer.
443 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
444 folder from quota calculations, a direct delivery into this folder messed
445 up the contents of the maildirsize file. This was because the regex was
446 used only to exclude .Trash (or whatever) when the size of the mailbox
447 was calculated. There was no check that a delivery was happening into an
448 excluded directory. This bug has been fixed by ignoring all quota
449 processing for deliveries into excluded directories.
451 PH/10 Added the maildirfolder_create_regex option to appendfile.
457 PH/01 The code for finding all the local interface addresses on a FreeBSD
458 system running IPv6 was broken. This may well have applied to all BSD
459 systems, as well as to others that have similar system calls. The broken
460 code found IPv4 interfaces correctly, but gave incorrect values for the
461 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
462 that it would not match correctly against @[] and not recognize the IPv6
465 PH/02 The ipliteral router was not recognizing addresses of the form user@
466 [ipv6:....] because it didn't know about the "ipv6:" prefix.
468 PH/03 Added disable_ipv6.
470 PH/04 Changed $reply_address to use the raw form of the headers instead of the
471 decoded form, because it is most often used to construct To: headers
472 lines in autoreplies, and the decoded form may well be syntactically
473 invalid. However, $reply_address has leading white space removed, and all
474 newlines turned into spaces so that the autoreply transport does not
477 PH/05 If group was specified without a user on a router, and no group or user
478 was specified on a transport, the group from the router was ignored.
480 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
481 for visible compile-time settings that can be used to change these
482 numbers, for those that want even more. Backwards compatibility with old
483 spool files has been maintained. However, going back to a previous Exim
484 release will lost any variables that are in spool files.
486 PH/07 Two small changes when running in the test harness: increase delay when
487 passing a TCP/IP connection to a new process, in case the original
488 process has to generate a bounce, and remove special handling of
489 127.0.0.2 (sic), which is no longer necessary.
491 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
492 be the same on different OS.
494 PH/09 Moved a debug statement in filter processing to avoid a race problem when
497 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
498 whether --show-vars was specified or not
500 JJ/02 exipick: Added support for new ACL variable spool format introduced
503 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
504 syntactically invalid From: or Reply-to: line, and a filter used this to
505 generate an autoreply, and therefore failed to obtain an address for the
506 autoreply, Exim could try to deliver to a non-existent relative file
507 name, causing unrelated and misleading errors. What now happens is that
508 it logs this as a hard delivery error, but does not attempt to create a
511 PH/11 The exinext utility has a -C option for testing purposes, but although
512 the given file was scanned by exinext itself; it wasn't being passed on
513 when Exim was called.
515 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
516 an end-of-file indication when reading a command response.
518 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
519 compiled. In many other places in Exim, IPv6 addresses are always
520 recognized, so I have changed this. It also means that IPv4 domain
521 literals of the form [IPV4:n.n.n.n] are now always recognized.
523 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
524 used if the router is not running as root, for example, when verifying at
525 ACL time, or when using -bh. The debugging output from this situation was
526 non-existent - all you got was a failure to exec. I have made two
529 (a) Failures to set uid/gid, the current directory, or a process leader
530 in a subprocess such as that created by queryprogram now generate
531 suitable debugging ouput when -d is set.
533 (b) The queryprogram router detects when it is not running as root,
534 outputs suitable debugging information if -d is set, and then runs
535 the subprocess without attempting to change uid/gid.
537 PH/15 Minor change to Makefile for building test_host (undocumented testing
540 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
541 additional section of a DNS packet that returns MX or SRV records.
542 Instead, it always explicitly searches for A/AAAA records. This avoids
543 major problems that occur when a DNS server includes only records of one
544 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
545 fixed another bug: if SRV records were looked up and the corresponding
546 address records were *not* found in the additional section, the port
547 values from the SRV records were lost.
549 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
550 using the correct key (the original address) when searching the retry
551 rules in order to find which one to use for generating the retry hint.
553 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
554 adding the default one. Similarly, if it contains a Reply-To: header, the
555 errors_reply_to option, if set, is not used.
557 PH/19 When calculating a retry time, Exim used to measure the "time since
558 failure" by looking at the "first failed" field in the retry record. Now
559 it does not use this if it is later than than the arrival time of the
560 message. Instead it uses the arrival time. This makes for better
561 behaviour in cases where some deliveries succeed, thus re-setting the
562 "first failed" field. An example is a quota failure for a huge message
563 when small messages continue to be delivered. Without this change, the
564 "time since failure" will always be short, possible causing more frequent
565 delivery attempts for the huge message than are intended.
566 [Note: This change was subsequently modified - see PH/04 for 4.62.]
568 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
569 $1, $2, $3) because the numerical variables can be reset during some
570 expansion items (e.g. "match"), thereby losing the authentication data.
572 PH/21 Make -bV show the size of off_t variables so that the test suite can
573 decide whether to run tests for quotas > 2G.
575 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
576 mailbox_size, and mailbox_filecount in the appendfile transport. If a
577 filecount value is greater than 2G or if a quota value is greater than 2G
578 on a system where the size of off_t is not greater than 4, a panic error
581 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
582 never match. The debug and -bh output now contains an explicit error
583 message indicating a malformed IPv4 address or mask.
585 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
586 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
589 PH/25 Do not write to syslog when running in the test harness. The only
590 occasion when this arises is a failure to open the main or panic logs
591 (for which there is an explicit test).
593 PH/26 Added the /no_tell option to "control=freeze".
595 PH/27 If a host name lookup failed very early in a connection, for example, if
596 the IP address matched host_lookup and the reverse lookup yielded a name
597 that did not have a forward lookup, an error message of the form "no IP
598 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
599 could be logged. Now it outputs the IP address instead of "NULL".
601 PH/28 An enabling patch from MH: add new function child_open_exim2() which
602 allows the sender and the authenticated sender to be set when
603 submitting a message from within Exim. Since child_open_exim() is
604 documented for local_scan(), the new function should be too.
606 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
607 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
608 results in an empty string is now treated as unset.
610 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
612 PH/31 Added sender_verify_fail logging option.
614 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
615 needed by RFC 822 but not by RFC 2822 was commented out. I have now
616 tidied the source and removed it altogether.
618 PH/33 When a queue run was abandoned because the load average was too high, a
619 log line was always written; now it is written only if the queue_run log
620 selector is set. In addition, the log line for abandonment now contains
621 information about the queue run such as the pid. This is always present
622 in "start" and "stop" lines but was omitted from the "abandon" line.
624 PH/34 Omit spaces between a header name and the colon in the error message that
625 is given when verify = headers_syntax fails (if there are lots of them,
626 the message gets confusing).
628 PH/35 Change the default for dns_check_names_pattern to allow slashes within
629 names, as there are now some PTR records that contain slashes. This check
630 is only to protect against broken name servers that fall over on strange
631 characters, so the fact that it applies to all lookups doesn't matter.
633 PH/36 Now that the new test suite is complete, we can remove some of the
634 special code in Exim that was needed for the old test suite. For example,
635 sorting DNS records because real resolvers return them in an arbitrary
636 order. The new test suite's fake resolver always returns records in the
639 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
640 bounces) except when queue_only is set, to avoid logging races between
641 the different processes.
643 PH/38 Panic-die if .include specifies a non-absolute path.
645 PH/39 A tweak to the "H" retry rule from its user.
647 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
648 a label. They prevented compilation on older perls.
650 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
651 a warning to be raised on newish perls.
653 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
654 on queue. Changes to match documented behaviour of showing count of
655 messages matching specified criteria.
657 PH/40 Changed the default ident timeout from 30s to 5s.
659 PH/41 Added support for the use of login_cap features, on those BSD systems
660 that have them, for controlling the resources used by pipe deliveries.
662 PH/42 The content-scanning code uses fopen() to create files in which to put
663 message data. Previously it was not paying any attention to the mode of
664 the files. Exim runs with umask(0) because the rest of the code creates
665 files with open(), and sets the required mode explicitly. Thus, these
666 files were ending up world-writeable. This was not a big issue, because,
667 being within the spool directory, they were not world-accessible. I have
668 created a function called modefopen, which takes an additional mode
669 argument. It sets umask(777), creates the file, chmods it to the required
670 mode, then resets the umask. All the relevant calls to fopen() in the
671 content scanning code have been changed to use this function.
673 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
674 to 24 hours. This avoids potential overflow problems when processing G
675 and H retry rules. I suspect nobody ever tinkers with this value.
677 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
679 PH/45 When the plaintext authenticator is running as a client, the server's
680 challenges are checked to ensure they are valid base64 strings. By
681 default, the authentication attempt is cancelled if an invalid string is
682 received. Setting client_ignore_invalid_base64 true ignores these errors.
683 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
684 they are received. Thus, the responses can be made to depend on the
685 challenges. If an invalid string is ignored, an empty string is placed in
688 PH/46 Messages that are created by the autoreply transport now contains a
689 References: header, in accordance with RFCs 2822 and 3834.
691 PH/47 Added authenticated_sender_force to the smtp transport.
693 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
695 PH/49 Installed latest patch from the Sieve maintainer.
697 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
698 was also set, the appendfile transport was unnecessarily scanning a
699 directory of message files (e.g. for maildir delivery) to find the count
700 of files (along with the size), even though it did not need this
701 information. It now does the scan only if it needs to find either the
702 size of the count of files.
704 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
706 PH/52 Two bugs concerned with error handling when the smtp transport is
709 (i) Exim was not creating retry information for temporary errors given
710 for individual recipients after the DATA command when the smtp transport
711 was used in LMTP mode. This meant that they could be retried too
712 frequently, and not timed out correctly.
714 (ii) Exim was setting the flag that allows error details to be returned
715 for LMTP errors on RCPT commands, but not for LMTP errors for individual
716 recipients that were returned after the DATA command.
718 PH/53 This is related to PH/52, but is more general: for any failing address,
719 when detailed error information was permitted to be returned to the
720 sender, but the error was temporary, then after the final timeout, only
721 "retry timeout exceeded" was returned. Now it returns the full error as
722 well as "retry timeout exceeded".
724 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
725 do this, and (what is worse) MTAs that accept it.
727 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
728 will now be deprecated.
730 PH/56 New os.c-cygwin from the Cygwin maintainer.
732 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
733 formats (previously only available in exim formats via -bpr, -bpru,
734 and -bpra. Now also available in native and exiqgrep formats)
736 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
737 with very large, slow to parse queues
739 JJ/08 exipick: added ! as generic prefix to negate any criteria format
741 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
743 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
744 responses to authentication challenges, though it was showing the
745 challenges; (ii) I've removed the CR characters from the debug output for
748 PH/58 Allow for the insertion of a newline as well as a space when a string
749 is turned into more than one encoded-word during RFC 2047 encoding. The
750 Sieve code now uses this.
752 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
753 data_4xx, lost_connection, tls_required.
755 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
756 message was being sent as an SMTP response.
758 PH/61 Add -l and -k options to exicyclog.
760 PH/62 When verifying, if an address was redirected to one new address, so that
761 verification continued, and the new address failed or deferred after
762 having set something in $address_data, the value of $address_data was not
763 passed back to the ACL. This was different to the case when no
764 redirection occurred. The value is now passed back in both cases.
766 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
767 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
768 use login_cap.h, so on its own it isn't the distinguishing feature. The
769 new name refers directly to the setclassresources() function.
771 PH/65 Added configuration files for NetBSD3.
773 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
775 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
776 is preferred over IPv4.
778 PH/68 The bounce_return_message and bounce_return_body options were not being
779 honoured for bounces generated during the reception of non-SMTP messages.
780 In particular, this applied to messages rejected by the ACL. This bug has
781 been fixed. However, if bounce_return_message is true and bounce_return_
782 body is false, the headers that are returned for a non-SMTP message
783 include only those that have been read before the error was detected.
784 (In the case of an ACL rejection, they have all been read.)
786 PH/69 The HTML version of the specification is now built in a directory called
787 spec_html instead of spec.html, because the latter looks like a path with
788 a MIME-type, and this confuses some software.
790 PH/70 Catch two compiler warnings in sieve.c.
792 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
793 function verify_get_ident() calls ip_connect() to connect a socket, but
794 if the "connect()" function timed out, ip_connect() used to close the
795 socket. However, verify_get_ident() also closes the socket later, and in
796 between Exim writes to the log, which may get opened at this point. When
797 the socket was closed in ip_connect(), the log could get the same file
798 descriptor number as the socket. This naturally causes chaos. The fix is
799 not to close the socket in ip_connect(); the socket should be closed by
800 the function that creates it. There was only one place in the code where
801 this was missing, in the iplookup router, which I don't think anybody now
802 uses, but I've fixed it anyway.
804 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
805 well as to direct DNS lookups. Otherwise the handling of names in host
806 lists is inconsistent and therefore confusing.
812 PH/01 Two changes to the default runtime configuration:
814 (1) Move the checks for relay_from_hosts and authenticated clients from
815 after to before the (commented out) DNS black list checks.
817 (2) Add control=submission to the relay_from_hosts and authenticated
818 clients checks, on the grounds that messages accepted by these
819 statements are most likely to be submissions.
821 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
823 (1) Generate an error if the third argument for the ${prvs expansion is
826 (2) Treat a missing third argument of ${prvscheck as if it were an empty
829 (3) Reset the variables that are obtained from the first argument of
830 ${prvscheck and used in the second argument before leaving the code,
831 because their memory is reclaimed, so using them afterwards may do
834 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
835 one (it's much easier than Tom thought :-).
837 (5) Because of (4), we can now allow for the use of $prvscheck_result
838 inside the third argument.
840 PH/03 For some reason, the default setting of PATH when running a command from
841 a pipe transport was just "/usr/bin". I have changed it to
844 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
845 anything to be listed in the output from -bV.
847 PH/05 When a filter generated an autoreply, the entire To: header line was
848 quoted in the delivery log line, like this:
850 => >A.N.Other <ano@some.domain> <original@ddress> ...
852 This has been changed so that it extracts the operative address. There
853 may be more than one such address. If so, they are comma-separated, like
856 => >ano@some.domain,ona@other.domain <original@ddress> ...
858 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
859 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
860 not being looked up in the rDNS to get a host name, Exim was showing the
861 IP address twice in Received: lines, even though the IP addresses were
862 identical. For example:
864 Received: from [1.2.3.4] (helo=[1.2.3.4])
866 However, if the real host name was known, it was omitting the HELO data
867 if it matched the actual IP address. This has been tidied up so that it
868 doesn't show the same IP address twice.
870 PH/07 When both +timestamp and +memory debugging was on, the value given by
871 $tod_xxx expansions could be wrong, because the tod_stamp() function was
872 called by the debug printing, thereby overwriting the timestamp buffer.
873 Debugging no longer uses the tod_stamp() function when +timestamp is set.
875 PH/08 When the original message was included in an autoreply transport, it
876 always said "this is a copy of the message, including all the headers",
877 even if body_only or headers_only was set. It now gives an appropriate
880 PH/09 Applied a patch from the Sieve maintainer which:
882 o fixes some comments
883 o adds the (disabled) notify extension core
884 o adds some debug output for the result of if/elsif tests
885 o points to the current vacation draft in the documentation
886 and documents the missing references header update
890 o fixes a bug in processing the envelope test (when testing
891 multiple envelope elements, the last element determinted the
894 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
895 Electronic Mail") by including:
897 Auto-submitted: auto-generated
899 in the messages that it generates (bounce messages and others, such as
900 warnings). In the case of bounce messages for non-SMTP mesages, there was
901 also a typo: it was using "Auto_submitted" (underscore instead of
902 hyphen). Since every message generated by Exim is necessarily in response
903 to another message, thes have all been changed to:
905 Auto-Submitted: auto-replied
907 in accordance with these statements in the RFC:
909 The auto-replied keyword:
911 - SHOULD be used on messages sent in direct response to another
912 message by an automatic process,
914 - MUST NOT be used on manually-generated messages,
916 - MAY be used on Delivery Status Notifications (DSNs) and Message
917 Disposition Notifications (MDNs),
919 - MUST NOT be used on messages generated by automatic or periodic
920 processes, except for messages which are automatic responses to
923 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
924 to the default Received: header definition.
926 PH/12 Added log selector acl_warn_skipped (default on).
928 PH/13 After a successful wildlsearch lookup, discard the values of numeric
929 variables because (a) they are in the wrong storage pool and (b) even if
930 they were copied, it wouldn't work properly because of the caching.
932 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
933 checking when decoding. Apparently there are clients that generate
934 overlong encoded strings. Why am I not surprised?
936 PH/15 If the first argument of "${if match_address" was not empty, but did not
937 contain an "@" character, Exim crashed. Now it writes a panic log message
938 and treats the condition as false.
940 PH/16 In autoreply, treat an empty string for "once" the same as unset.
942 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
943 extension "envelope-auth". The code is finished and in agreement with
944 other implementations, but there is no documentation so far and in fact,
945 nobody wrote the draft yet. This extension is currently #undef'ed, thus
946 not changing the active code.
948 Print executed "if" and "elsif" statements when debugging is used. This
949 helps a great deal to understand what a filter does.
951 Document more things not specified clearly in RFC3028. I had all this
952 sorted out, when out of a sudden new issues came to my mind. Oops."
954 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
957 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
958 canonical form (as documented). However, after a host name lookup from
959 the IP address, check_host() was doing a simple string comparison with
960 addresses acquired from the DNS when checking that the found name did
961 have the original IP as one of its addresses. Since any found IPv6
962 addresses are likely to be in abbreviated form, the comparison could
963 fail. Luckily, there already exists a function for doing the comparison
964 by converting both addresses to binary, so now that is used instead of
967 PH/20 There was another similar case to PH/19, when a complete host name was
968 given in a host list; looking up its IP address could give an abbreviated
969 form, whereas the current host's name might or might not be abbreviated.
970 The same fix has been applied.
976 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
977 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
980 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
981 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
983 PH/03 Typo: missing ".o" in src/pcre/Makefile.
985 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
986 header line, restrict the check to what is listed in RFCs 2369 and 2929.
987 Also, for "Auto-Submitted", treat anything other than "no" as
988 non-personal, in accordance with RFC 3834. (Previously it treated
989 anything starting "auto-" as non-personal.)
991 TF/01 The control=submission/name=... option had a problem with syntax
992 errors if the name included a slash character. The /name= option
993 now slurps the rest of the string, so it can include any characters
994 but it must come last in the list of options (after /sender_retain
997 PH/05 Some modifications to the interface to the fake nameserver for the new
1005 TK/01 Added the "success_on_redirect" address verification option. See
1006 NewStuff for rationale and an example.
1008 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1010 PH/02 Patch to exigrep to allow it to work on syslog lines.
1012 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1013 fread() to skip over the body file's header line, because in Cygwin the
1014 header line is locked and is inaccessible.
1016 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1017 co-exist for some time) to make it clear that it is the Exim ID that is
1018 referenced, not the Message-ID: header line.
1020 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1021 string_format() function, because snprintf() does not exist on all
1024 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1025 ${stat: expansion item.
1027 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1028 protocol synchronization error", to keep the pedants happy.
1030 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1031 well as for IRIX systems, when gcc is being used. See the host.c source
1034 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1036 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1039 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1040 transport and to the smtp transport in LMTP mode.
1042 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1044 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1045 run a filter in a subprocess. This could lead to confusion in subsequent
1046 lookups in the parent process. There should also be a search_tidyup() at
1047 the end of the subprocess.
1049 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1050 only if the host matched helo_try_verify_hosts, which caused the
1051 verification to occur when the EHLO/HELO command was issued. The ACL just
1052 tested the remembered result. Now, if a previous verification attempt has
1053 not happened, "verify = helo" does it there and then.
1055 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1057 TK/03 Fix log output including CR from clamd.
1059 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1060 exist provoked a memory error which could cause a segfault.
1062 PH/15 Installed PCRE 6.2
1064 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1066 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1067 of the problem. Specifically, suggested +O2 rather than +O1 for the
1070 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1072 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1073 record, the port was not correctly logged when the outgoing_port log
1074 selector was set (it logged the transort's default port).
1076 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1077 fallback_hosts, and "hosts" in the smtp transport.
1079 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1080 host errors such as "Connection refused".
1082 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1083 authentication with radiusclient 0.4.9:
1085 - Error returned from rc_read_config was caught wrongly
1086 - Username/password not passed on to radius server due to wrong length.
1088 The presumption is that some radiusclient API changes for 4.51/PH/17
1089 were not taken care of correctly. The code is still untested by me (my
1090 Linux distribution still has 0.3.2 of radiusclient), but it was
1091 contributed by a Radius user.
1093 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1094 expanding the "port" option of the smtp transport.
1096 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1097 while reading a MIME header. Thanks to Tom Hughes for a patch.
1099 PH/24 Include config.h inside local_scan.h so that configuration settings are
1102 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1103 that in an ACL for RCPT (for example), you can examine exactly what was
1106 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1107 commands, but it was not correctly comparing the address with the actual
1108 client host address. Thus, it would show the EHLO address in Received:
1109 header lines when this was not necessary.
1111 PH/27 Added the % operator to ${eval:}.
1113 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1114 it should be ignoring failures (because with -C, for example, it has lost
1115 privilege). It wasn't ignoring creation failures other than "already
1118 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1121 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1122 because an input line was too long, either on its own, or by virtue of
1123 too many continuations, the temporary file was not being removed, and the
1124 return code was incorrect.
1126 PH/31 Missing "BOOL" in function definition in filtertest.c.
1128 PH/32 Applied Sieve patches from the maintainer.
1130 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1132 PH/33 Added "verify = not_blind".
1134 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1135 Local/Makefile (with some defaults set). These are used in built scripts
1136 such as exicyclog, but they have never been used in the exim_install
1137 script (though there are many overriding facilities there). I have
1138 arranged that the exim_install script now takes note of these two
1141 PH/35 Installed configuration files for Dragonfly.
1143 PH/36 When a locally submitted message by a trusted user did not contain a
1144 From: header, and the sender address was obtained from -f or from an SMTP
1145 MAIL command, and the trusted user did not use -F to supply a sender
1146 name, $originator_name was incorrectly used when constructing a From:
1147 header. Furthermore, $originator_name was used for submission mode
1148 messages from external hosts without From: headers in a similar way,
1149 which is clearly wrong.
1151 PH/37 Added control=suppress_local_fixups.
1153 PH/38 When log_selector = +received_sender was set, and the addition of the
1154 sender made the log line's construction buffer exactly full, or one byte
1155 less than full, an overflow happened when the terminating "\n" was
1158 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1159 when the result of a list match is failure because a DNS lookup failed.
1161 PH/40 RM_COMMAND is now used in the building process.
1163 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1164 the "build-* directories that it finds.
1166 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1167 address in a domain literal was a prefix of an interface address.
1169 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1170 when verifying a sender address, unless rewrite_headers is false.
1172 PH/44 Wrote a long comment about why errors_to addresses are verified as
1173 recipients, not senders.
1175 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1176 the ratelimit ACL was added.
1178 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1180 PH/46 Added extra information about PostgreSQL errors to the error string.
1182 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1183 avoiding the need to install special zones in a real server. This is
1184 backwards compatible; if it can't find the fake resolver, it drops back.
1185 Thus, both old and new test suites can be run.
1187 TF/02 Added util/ratelimit.pl
1189 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1190 clock is set back in time.
1192 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1193 Candler <B.Candler@pobox.com>.
1195 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1196 OK for addresses that are the result of redirections.
1198 PH/48 A number of further additions for the benefit of the new test suite,
1199 including a fake gethostbyname() that interfaces to the fake DNS resolver
1202 TF/06 The fix for widen_domains has also been applied to qualify_single and
1203 search_parents which are the other dnslookup options that can cause
1206 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1209 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1211 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1212 service" if it encountered an MX record with an empty target hostname.
1213 The message is now "an MX or SRV record indicated no SMTP service".
1215 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1216 if the DNS of the sending site is misconfigured. This is quite a
1217 common situation. This change restores the behaviour of treating a
1218 helo verification defer as a failure.
1220 PH/51 If self=fail was set on a router, the bounce message did not include the
1221 actual error message.
1227 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1229 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1230 command itself ended in error, the underlying message about the transport
1231 filter timeout was being overwritten with the pipe command error. Now the
1232 underlying error message should be appended to the second error message.
1234 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1236 PH/02 Reduce the amount of output that "make" produces by default. Full output
1237 can still be requested.
1239 PH/03 The warning log line about a condition test deferring for a "warn" verb
1240 was being output only once per connection, rather than after each
1241 occurrence (because it was using the same function as for successful
1242 "warn" verbs). This seems wrong, so I have changed it.
1244 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1245 it should not have, which might have caused a crash in the right
1246 circumstances, but probably never did.
1248 PH/04 Installed a modified version of Tony Finch's patch to make submission
1249 mode fix the return path as well as the Sender: header line, and to
1250 add a /name= option so that you can make the user's friendly name appear
1253 TF/03 Added the control = fakedefer ACL modifier.
1255 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1256 Mark Lowes for thorough testing.
1258 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1260 TK/03 Merged latest SRS patch from Miles Wilton.
1262 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1263 with the definition in sysexits.h (which is #included earlier).
1264 Fortunately, Exim does not actually use EX_OK. The code used to try to
1265 preserve the sysexits.h value, by assumimg that macro definitions were
1266 scanned for macro replacements. I have been disabused of this notion,
1267 so now the code just undefines EX_OK before #including unistd.h.
1269 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1270 in the smtp transport. When a block could not be written in a single
1271 write() function, the timeout was being re-applied to each part-write.
1272 This seems wrong - if the receiver was accepting one byte at a time it
1273 would take for ever. The timeout is now adjusted when this happens. It
1274 doesn't have to be particularly precise.
1276 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1277 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1279 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1280 without a domain if the check to <postmaster@domain> fails.
1282 SC/01 Eximstats: added -xls and the ability to specify output files
1283 (patch written by Frank Heydlauf).
1285 SC/02 Eximstats: use FileHandles for outputing results.
1287 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1289 SC/04 Eximstats: fixed display of large numbers with -nvr option
1291 SC/05 Eximstats: fixed merging of reports with empty tables.
1293 SC/06 Eximstats: added the -include_original_destination flag
1295 SC/07 Eximstats: removed tabs and trailing whitespace.
1297 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1299 TK/06 MBOX spool code: Add real "From " MBOX separator line
1300 so the .eml file is really in mbox format (even though
1301 most programs do not really care). Patch from Alex Miller.
1303 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1304 The latter is generated from $received_to and is only set if the
1305 message has one envelope recipient. SA can use these headers,
1306 obviously out-of-the-box. Patch from Alex Miller.
1308 PH/08 The ${def test on a variable was returning false if the variable's
1309 value was "0", contrary to what the specification has always said!
1310 The result should be true unless the variable is empty.
1312 PH/09 The syntax error of a character other than { following "${if
1313 def:variable_name" (after optional whitespace) was not being diagnosed.
1314 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1315 accidental colon was present, for example, could give incorrect results.
1317 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1318 result is used (not including appendfile, where other changes are about
1321 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1322 This involved changing a lot of size variables from int to off_t. It
1323 should work with maildirs and everything.
1325 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1326 spamd dying while we are connected to it.
1328 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1331 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1332 function for BDB 4.3.
1334 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1336 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1337 the sources for PCRE have been re-arranged and more files are now
1340 PH/15 The code I had for printing potentially long long variables in PH/11
1341 above was not the best (it lost precision). The length of off_t variables
1342 is now inspected at build time, and an appropriate printing format (%ld
1343 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1344 to be "long long int" or "long int". This is needed for the internal
1345 formatting function string_vformat().
1347 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1348 the configuration file to be ":syslog", then the script "guesses" where
1349 the logs files are, rather than using the compiled in default. In our
1350 case the guess is not the same as the compiled default, so the script
1351 suddenly stopped working when I started to use syslog. The patch checks
1352 to see if log_file_path is "". If so, it attempts to read it from exim
1353 with no configuration file to get the compiled in version, before it
1354 falls back to the previous guessing code."
1356 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1357 implementing BATV in an Exim configuration. See NewStuff for the gory
1360 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1361 Makefile that are specific to HP-UX.
1363 PH/18 If the "use_postmaster" option was set for a recipient callout together
1364 with the "random" option, the postmaster address was used as the MAIL
1365 FROM address for the random test, but not for the subsequent recipient
1366 test. It is now used for both.
1368 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1369 patch removes a few documentation additions to RFC 3028, because the
1370 latest draft now contains them. It adds the new en;ascii-case comparator
1371 and a new error check for 8bit text in MIME parts. Comparator and
1372 require names are now matched exactly. I enabled the subaddress
1373 extension, but it is not well tested yet (read: it works for me)."
1375 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1376 rework some of the code of TK/09 above to avoid the hardwired use of
1377 "%lld" and "long long". Replaced the call to snprintf() with a call to
1380 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1381 records point to non-existent hosts", "retry timeout exceeded", and
1382 "retry time not reached for any host after a long failure period".
1384 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1385 experimental DomainKeys support:
1387 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1388 (2) On an error such as an illegally used "control", the wrong name for
1389 the control was given.
1391 These problems did NOT occur unless DomainKeys support was compiled.
1393 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1395 PH/24 Added ${if match_ip condition.
1397 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1398 databases so that it will be absolutely obvious if a crash occurs in the
1399 DB library. This is a regular occurrence (often caused by mis-matched
1402 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1403 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1404 picked up on a user's system that detects such things. There doesn't seem
1405 to be a gcc warning option for this - only an attribute that has to be
1406 put on the function's prototype. It seems that in Fedora Core 4 they have
1407 set this on a number of new functions. No doubt there will be more in due
1410 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1411 specify a transport. However, if an address that was verified by such a
1412 router was the subject of a callout, Exim crashed because it tried to
1413 read the rcpt_include_affixes from the non-existent transport. Now it
1414 just assumes that the setting of that option is false. This bug was
1415 introduced by 4.51/PH/31.
1417 PH/28 Changed -d+all to exclude +memory, because that information is very
1418 rarely of interest, but it makes the output a lot bigger. People tend to
1419 do -d+all out of habit.
1421 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1422 code in os-type was giving problems when libc.so lives in lib64, like on
1425 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1426 aren't the modern standard, and it seems that some systems' include files
1427 don't always have them. Exim was already checking for some of the newer
1428 ones like T_AAAA, and defining it itself. I've added checks for all the
1429 record types that Exim uses.
1431 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1432 not automatically generating a new one, as it is supposed to. This
1433 prevented TLS from working. If the file did exist, but contained invalid
1434 data, a new version was generated, as expected. It was only the case of a
1435 non-existent file that was broken.
1437 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1438 with a change in libdomainkeys > 0.64.
1440 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1441 from DNS. If the selector record carries the flag, it now has
1442 precedence over the domain-wide flag.
1444 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1446 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1447 the use of a port name that isn't defined in /etc/services) occurred, the
1448 message was deferred as in a normal delivery, and thus remained on the
1449 spool, instead of being failed because of the mua_wrapper setting. This
1450 is now fixed, and I tidied up some of the mua_wrapper messages at the
1453 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1454 the messages in a hash of arrays rather than using individual hashes.
1455 This is a bit cleaner and results in dramatic memory savings, albeit
1456 at a slight CPU cost.
1458 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1459 as requested by Marc Sherman.
1461 SC/10 Eximstats: added histograms for user specified patterns as requested
1464 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1466 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1467 fopen() in the content-scanning modules that did not already have it.
1473 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1474 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1476 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1478 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1480 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1481 to test Sieve filters that use "vacation".
1483 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1484 that changes the way the GnuTLS parameters are stored in the cache file.
1485 The new format can be generated externally. For backward compatibility,
1486 if the data in the cache doesn't make sense, Exim assumes it has read an
1487 old-format file, and it generates new data and writes a new file. This
1488 means that you can't go back to an older release without removing the
1491 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1492 work if there are any delivery delays because "one_time" forces the
1493 parent to be marked "delivered", so its unseen clone is never tried
1494 again. For this reason, Exim now forbids the simultaneous setting of
1497 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1498 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1499 entry if you want to know the details. The fix, however, neglected to
1500 consider the case when local delivery batching is involved. The test for
1501 "previously delivered" was not happening when checking to see if an
1502 address could be batched with a previous (undelivered) one; under
1503 certain circumstances this could lead to multiple deliveries to the same
1506 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1507 in its include files, and this causes problems building Exim.
1509 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1510 header_syntax) but Exim was just ignoring anything given after a slash.
1511 In particular, this caused confusion with an attempt to use "verify =
1512 reverse_host_lookup/defer_ok". An error is now given when options are
1513 supplied for verify items that do not have them. (Maybe reverse_host_
1514 lookup should have a defer_ok option, but that's a different point.)
1516 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1517 defined by RFC 821) to 2048, because there were problems with some AUTH
1518 commands, and RFC 1869 says the size should be increased for extended
1519 SMTP commands that take arguments.
1521 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1524 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1525 "unknown" error; now it says that the functionality isn't in the binary.
1527 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1528 an address' error message when a string expansion fails (syntax or
1529 whatever). Otherwise the password may appear in the log. Following change
1530 PH/42 below, there is no longer a chance of it appearing in a bounce
1533 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1535 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1536 of its addresses was ever tried. (Bugzilla bug #2.)
1538 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1539 the result incorrectly in the debug output. (It correctly added a newline
1540 to what was transported.)
1542 TF/01 Added $received_time.
1544 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1545 commented out examples of how to interface to a virus scanner and to
1546 SpamAssassin. Also added commented examples of av_scanner and
1547 spamd_address settings.
1549 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1550 and controls are allowed in which ACLs. There were a couple of minor
1551 errors. Some of the entries in the conditions table (which is a table of
1552 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1553 negation of where the condition IS allowed.
1555 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1557 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1558 header file does not have a version number, so I've had to invent a new
1559 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1560 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1561 radiusclient), but it was contributed by a Radius user.
1563 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1564 files or directories, for OpenSSL.
1566 PH/19 When an Exim process that is running as root has to create an Exim log
1567 file, it does so in a subprocess that runs as exim:exim so as to get the
1568 ownership right at creation (otherwise, other Exim processes might see
1569 the file with the wrong ownership). There was no test for failure of this
1570 fork() call, which would lead to the process getting stuck as it waited
1571 for a non-existent subprocess. Forks do occasionally fail when resources
1572 run out. I reviewed all the other calls to fork(); they all seem to check
1575 PH/20 When checking for unexpected SMTP input at connect time (before writing
1576 the banner), Exim was not dealing correctly with a non-positive return
1577 from the read() function. If the client had disconnected by this time,
1578 the result was a log entry for a synchronization error with an empty
1579 string after "input=" when read() returned zero. If read() returned -1
1580 (an event I could not check), uninitialized data bytes were printed.
1581 There were reports of junk text (parts of files, etc) appearing after
1584 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1586 PH/22 Added support for macro redefinition, and (re)definition in between
1587 driver and ACL definitions.
1589 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1590 forgetting to use the resulting value; it was using the unexpanded value.
1592 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1593 hadn't been configured. The fix is from Juergen Kreileder, who
1594 understands it better than I do:
1596 "Here's what I see happening with three configured cyrus_sasl
1597 authenticators configured (plain, login, cram-md5):
1599 On startup auth_cyrus_sasl_init() gets called for each of these.
1600 This means three calls to sasl_listmech() without a specified mech_list.
1601 => SASL tests which mechs of all available mechs actually work
1602 => three warnings about OTP not working
1603 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1605 With the patch, sasl_listmech() also gets called three times. But now
1606 SASL's mech_list option is set to the server_mech specified in the the
1607 authenticator. Or in other words, the answer from sasl_listmech()
1608 gets limited to just the mech you're testing for (which is different
1610 => the return list contains just 'plain' or 'login', 'cram-md5' or
1611 nothing depending on the value of ob->server_mech.
1613 I've just tested the patch: Authentication still works fine,
1614 unavailable mechs specified in the exim configuration are still
1615 caught, and the auth.log warnings about OTP are gone."
1617 PH/25 When debugging is enabled, the contents of the command line are added
1618 to the debugging output, even when log_selector=+arguments is not
1621 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1622 answer is "GNU", and only if the return is "GNU/something" is the answer
1625 PH/27 $acl_verify_message is now set immediately after the failure of a
1626 verification in an ACL, and so is available in subsequent modifiers. In
1627 particular, the message can be preserved by coding like this:
1629 warn !verify = sender
1630 set acl_m0 = $acl_verify_message
1632 Previously, $acl_verify_message was set only while expanding "message"
1633 and "log_message" when a very denied access.
1635 PH/28 Modified OS/os.c-Linux with
1637 -#ifndef OS_LOAD_AVERAGE
1638 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1640 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1641 nomenclature these days.)
1643 PH/29 Installed patch from the Sieve maintainer that adds the options
1644 sieve_useraddress and sieve_subaddress to the redirect router.
1646 PH/30 In these circumstances:
1647 . Two addresses routed to the same list of hosts;
1648 . First host does not offer TLS;
1649 . First host accepts first address;
1650 . First host gives temporary error to second address;
1651 . Second host offers TLS and a TLS session is established;
1652 . Second host accepts second address.
1653 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1654 and peerdn, if requested) that were in fact used only for the second
1657 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1658 attention to any local part prefix or suffix that was matched by the
1659 router that accepted the address. It now behaves in the same way as it
1660 does for delivery: the affixes are removed from the local part unless
1661 rcpt_include_affixes is set on the transport.
1663 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1664 timeout during the DATA phase of an incoming message.
1666 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1667 applied a patch sanctioned by the Sieve maintainer.
1669 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1670 the uid or gid is negative. A case of a negative gid caused this to be
1671 noticed. The fix allows for either to be negative.
1673 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1674 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1677 PH/36 The change PH/12 above was broken. Fixed it.
1679 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1680 the grounds that routing the same address twice would always produce the
1681 same answer. This might have been true once, but it is certainly no
1682 longer true now. Routing a child address may depend on the previous
1683 routing that produced that child. Some complicated redirection strategies
1684 went wrong when messages had multiple recipients, and made Exim's
1685 behaviour dependent on the order in which the addresses were given.
1687 I have moved the duplicate checking until after the routing is complete.
1688 Exim scans the addresses that are assigned to local and remote
1689 transports, and removes any duplicates. This means that more work will be
1690 done, as duplicates will always all be routed, but duplicates are
1691 presumably rare, so I don't expect this is of any significance.
1693 For deliveries to pipes, files, and autoreplies, the duplicate checking
1694 still happens during the routing process, since they are not going to be
1697 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1698 It corrects a timeout issue with spamd. This is Ian's comment: "The
1699 background is that sometimes spamd either never reads data from a
1700 connection it has accepted, or it never writes response data. The exiscan
1701 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1702 blindly assumes that writes won't block so it may never time out."
1704 PH/39 Allow G after quota size as well as K and M.
1706 PH/40 The value set for $authenticated_id in an authenticator may not contain
1707 binary zeroes or newlines because the value is written to log lines and
1708 to spool files. There was no check on this. Now the value is run through
1709 the string_printing() function so that such characters are converted to
1710 printable escape sequences.
1712 PH/41 $message_linecount is a new variable that contains the total number of
1713 lines in the message. Compare $body_linecount, which is the count for the
1716 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1717 bounce and delay warning messages, except in certain special cases, which
1720 (a) An SMTP error message from a remote host;
1721 (b) A message specified in a :fail: redirection;
1722 (c) A message specified in a "fail" command in a system filter;
1723 (d) A message specified in a FAIL return from the queryprogram router;
1724 (e) A message specified by the cannot_route_message router option.
1726 In these cases only, Exim does include the error details in bounce and
1727 warning messages. There are also a few cases where bland messages such
1728 as "unrouteable address" or "local delivery error" are given.
1730 PH/43 $value is now also set for the "else" part of a ${run expansion.
1732 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1733 being worked on, but at least Exim now implements the latest version to
1736 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1737 process to complete was treated as a delivery failure, a timeout while
1738 writing the message to the pipe was logged, but erroneously treated as a
1739 successful delivery. Such timeouts include transport filter timeouts. For
1740 consistency with the overall process timeout, these timeouts are now
1741 treated as errors, giving rise to delivery failures by default. However,
1742 there is now a new Boolean option for the pipe transport called
1743 timeout_defer, which, if set TRUE, converts the failures into defers for
1744 both kinds of timeout. A transport filter timeout is now identified in
1747 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1748 systems where "make" and "gmake" are different, calling "gmake" at top
1749 level broke things. I've arranged for the value of $(MAKE) to be passed
1750 from the Makefile to this script so that it can call the same version of
1754 A note about Exim versions 4.44 and 4.50
1755 ----------------------------------------
1757 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1758 changes of various kinds. As a consequence, a big documentation update was
1759 needed. This delayed the release for rather longer than seemed good, especially
1760 in the light of a couple of (minor) security issues. Therefore, the changes
1761 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1762 release. So 4.44 and 4.50 are in effect two different branches that both start
1765 I have left the 4.50 change log unchanged; it contains all the changes since
1766 4.43. The change log for 4.44 is below; many of its items are identical to
1767 those for 4.50. This seems to be the most sensible way to preserve the
1768 historical information.
1774 1. Minor wording change to the doc/README.SIEVE file.
1776 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1777 computation of the current number of files was incorrect.
1779 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1780 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1783 4. Give more explanation in the error message when the command for a transport
1784 filter fails to execute.
1786 5. There are several places where Exim runs a non-Exim command in a
1787 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1788 was being done only for the command run by the queryprogram router. It is
1789 now done for all such subprocesses. The other cases are: ${run, transport
1790 filters, and the commands run by the lmtp and pipe transports.
1792 6. Added CONFIGURE_GROUP build-time option.
1794 7. Some older OS have a limit of 256 on the maximum number of file
1795 descriptors. Exim was using setrlimit() to set 1000 as a large value
1796 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1797 systems. I've change it so that if it can't get 1000, it tries for 256.
1799 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1800 was an oversight, and furthermore, ever since the addition of extra
1801 controls (e.g. 4.43/32), the checks on when to allow different forms of
1802 "control" were broken. There should now be diagnostics for all cases when a
1803 control that does not make sense is encountered.
1805 9. Added the /retain_sender option to "control=submission".
1807 10. $recipients is now available in the predata ACL (oversight).
1809 11. Tidy the search cache before the fork to do a delivery from a message
1810 received from the command line. Otherwise the child will trigger a lookup
1811 failure and thereby defer the delivery if it tries to use (for example) a
1812 cached ldap connection that the parent has called unbind on.
1814 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1815 of $address_data from the recipient verification was clobbered by the
1816 sender verification.
1818 13. The value of address_data from a sender verification is now available in
1819 $sender_address_data in subsequent conditions in the ACL statement.
1821 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1823 15. Added a new option "connect=<time>" to callout options, to set a different
1826 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1827 was its contents. (It was OK if the option was not defined at all.)
1829 17. A "Completed" log line is now written for messages that are removed from
1830 the spool by the -Mrm option.
1832 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1833 information about exactly what failed.
1835 19. Added -dd to debug only the daemon process.
1837 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1838 handles timeouts, both on the server side and network timeouts. Renamed the
1839 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1841 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1842 It is now set to "smtps".
1844 22. $host_address is now set to the target address during the checking of
1845 ignore_target_hosts.
1847 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1848 being passed; this would have caused $sender_host_name to have been used if
1849 matching the list had actually called for a host name (not very likely,
1850 since this list is usually IP addresses). A host name is now passed as
1853 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1854 code that specifies a non-restarting handler (typically sigaction() in
1855 modern systems) in an attempt to fix a rare and obscure crash bug.
1857 25. Narrowed the window for a race in the daemon that could cause it to ignore
1858 SIGCHLD signals. This is not a major problem, because they are used only to
1859 wake it up if nothing else does.
1861 26. A malformed maildirsize file could cause Exim to calculate negative values
1862 for the mailbox size or file count. Odd effects could occur as a result.
1863 The maildirsize information is now recalculated if the size or filecount
1866 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1867 support for a long time. Removed HAVE_SYS_VFS_H.
1869 28. Installed the latest version of exipick from John Jetmore.
1871 29. In an address list, if the pattern was not a regular expression, an empty
1872 subject address (from a bounce message) matched only if the pattern was an
1873 empty string. Non-empty patterns were not even tested. This was the wrong
1874 because it is perfectly reasonable to use an empty address as part of a
1875 database query. An empty address is now tested by patterns that are
1876 lookups. However, all the other forms of pattern expect the subject to
1877 contain a local part and a domain, and therefore, for them, an empty
1878 address still always fails if the pattern is not itself empty.
1880 30. Exim went into a mad DNS loop when attempting to do a callout where the
1881 host was specified on an smtp transport, and looking it up yielded more
1882 than one IP address.
1884 31. Re-factored the code for checking spool and log partition space into a
1885 function that finds that data and another that does the check. The former
1886 is then used to implement four new variables: $spool_space, $log_space,
1887 $spool_inodes, and $log_inodes.
1889 32. The RFC2047 encoding function was originally intended for short strings
1890 such as real names; it was not keeping to the 75-character limit for
1891 encoded words that the RFC imposes. It now respects the limit, and
1892 generates multiple encoded words if necessary. To be on the safe side, I
1893 have increased the buffer size for the ${rfc2047: expansion operator from
1896 33. It is now permitted to omit both strings after an "if" condition; if the
1897 condition is true, the result is "true". As before, when the second string
1898 is omitted, a false condition yields an empty string. This makes it less
1899 cumbersome to write custom ACL and router conditions.
1901 34. Failure to deliver a bounce message always caused it to be frozen, even if
1902 there was an errors_to setting on the router. The errors_to setting is now
1905 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1906 canonical form (fully expanded) before being placed in
1907 $sender_host_address.
1909 36. The table in the code that translates DNS record types into text (T_A to
1910 "A" for instance) was missing entries for NS and CNAME. It is just possible
1911 that this could have caused confusion if both these types were looked up
1912 for the same domain, because the text type is used as part of Exim's
1913 per-process caching. But the chance of anyone hitting this buglet seems
1916 37. The dnsdb lookup has been extended in a number of ways.
1918 (1) There is a new type, "zns", which walks up the domain tree until it
1919 finds some nameserver records. It should be used with care.
1921 (2) There is a new type, "mxh", which is like "mx" except that it returns
1922 just the host names, not the priorities.
1924 (3) It is now possible to give a list of domains (or IP addresses) to be
1925 looked up. The behaviour when one of the lookups defers can be
1926 controlled by a keyword.
1928 (4) It is now possible to specify the separator character for use when
1929 multiple records are returned.
1931 38. The dnslists ACL condition has been extended: it is now possible to supply
1932 a list of IP addresses and/or domains to be looked up in a particular DNS
1935 39. Added log_selector=+queue_time_overall.
1937 40. When running the queue in the test harness, wait just a tad after forking a
1938 delivery process, to get repeatability of debugging output.
1940 41. Include certificate and key file names in error message when GnuTLS fails
1941 to set them up, because the GnuTLS error message doesn't include the name
1942 of the failing file when there is a problem reading it.
1944 42. Allow both -bf and -bF in the same test run.
1946 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1948 44. The "Exiscan patch" is now merged into the mainline Exim source.
1950 45. Sometimes the final signoff response after QUIT could fail to get
1951 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1952 < 0 before doing a fflush(). This bug looks as though it goes back to the
1953 introduction of TLS in release 3.20, but "sometimes" must have been rare
1954 because the tests only now provoked it.
1956 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1957 (this can affect the format of dates).
1959 47. exim_tidydb, when checking for the continued existence of a message for
1960 which it has found a message-specific retry record, was not finding
1961 messages that were in split spool directories. Consequently, it was
1962 deleting retry records that should have stayed in existence.
1964 48. Steve fixed some bugs in eximstats.
1966 49. The SPA authentication driver was not abandoning authentication and moving
1967 on to the next authenticator when an expansion was forced to fail,
1968 contradicting the general specification for all authenticators. Instead it
1969 was generating a temporary error. It now behaves as specified.
1971 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1972 (the order specifies the preference for clients). The order is now AES256,
1973 AES128, 3DES, ARCFOUR128.
1975 51. Small patch to Sieve code - explicitly set From: when generating an
1978 52. Exim crashed if a remote delivery caused a very long error message to be
1979 recorded - for instance if somebody sent an entire SpamAssassin report back
1980 as a large number of 550 error lines. This bug was coincidentally fixed by
1981 increasing the size of one of Exim's internal buffers (big_buffer) that
1982 happened as part of the Exiscan merge. However, to be on the safe side, I
1983 have made the code more robust (and fixed the comments that describe what
1986 53. Now that there can be additional text after "Completed" in log lines (if
1987 the queue_time_overall log selector is set), a one-byte patch to exigrep
1988 was needed to allow it to recognize "Completed" as not the last thing in
1991 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1992 patch that reportedly fixes this has been added. I am not expert enough to
1993 create a test for it. This is what the patch creator wrote:
1995 "I found a little strange behaviour of ldap code when working with
1996 Windows 2003 AD Domain, where users was placed in more than one
1997 Organization Units. When I tried to give exim partial DN, the exit code
1998 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1999 But simultaneously result of request was absolutely normal ldap result,
2000 so I produce this patch..."
2002 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2003 REFERENCE, so I have modified the code to exclude the patch when that macro
2006 55. Some experimental protocols are using DNS PTR records for new purposes. The
2007 keys for these records are domain names, not reversed IP addresses. The
2008 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2009 leaves it alone. Component reversal etc. now happens only for IP addresses.
2012 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2014 57. Double the size of the debug message buffer (to 2048) so that more of very
2015 long debug lines gets shown.
2017 58. The exicyclog utility now does better if the number of log files to keep
2018 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2020 59. Two changes related to the smtp_active_hostname option:
2022 (1) $smtp_active_hostname is now available as a variable.
2023 (2) The default for smtp_banner uses $smtp_active_hostname instead
2024 of $primary_hostname.
2026 60. The host_aton() function is supposed to be passed a string that is known
2027 to be a valid IP address. However, in the case of IPv6 addresses, it was
2028 not checking this. This is a hostage to fortune. Exim now panics and dies
2029 if the condition is not met. A case was found where this could be provoked
2030 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2031 components; fortuitously, this particular loophole had already been fixed
2032 by change 4.50/55 above.
2034 If there are any other similar loopholes, the new check in host_aton()
2035 itself should stop them being exploited. The report I received stated that
2036 data on the command line could provoke the exploit when Exim was running as
2037 exim, but did not say which command line option was involved. All I could
2038 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2039 running as the user.
2042 61. There was a buffer overflow vulnerability in the SPA authentication code
2043 (which came originally from the Samba project). I have added a test to the
2044 spa_base64_to_bits() function which I hope fixes it.
2047 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2048 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2050 63. The daemon start-up calls getloadavg() while still root for those OS that
2051 need the first call to be done as root, but it missed one case: when
2052 deliver_queue_load_max is set with deliver_drop_privilege. This is
2053 necessary for the benefit of the queue runner, because there is no re-exec
2054 when deliver_drop_privilege is set.
2056 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2057 This has been fixed.
2059 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2060 was in use, was not putting the data itself into the right store pool;
2061 consequently, it could be overwritten for a subsequent message in the same
2062 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2065 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2067 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2068 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2069 the function were treating the return as a boolean value, which happened to
2070 work because 0=false and not-0=true, but is not correct code.
2072 68. The host_aton() function was not handling scoped IPv6 addresses (those
2073 with, for example, "%eth0" on the end) correctly.
2075 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2076 negated items (that is, ~something) in unsigned ints. Some compilers
2077 apparently mutter when there is no cast.
2079 70. If an address verification called from an ACL failed, and did not produce a
2080 user-specific message (i.e. there was only a "system" message), nothing was
2081 put in $acl_verify_message. In this situation, it now puts the system
2084 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2085 session; change 4.31/43 added the unwanted input to the log line - except
2086 that it did not do this in the start of session case. It now does.
2088 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2089 This is wrong and can cause the other end to generate a synchronization
2090 error if it is another Exim or anything else that does the synchronization
2091 check. A QUIT command is no longer sent after a timeout.
2093 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2094 during host lookups.
2096 74. The defer_ok option of callout verification was not working if it was used
2097 when verifying addresses in header lines, that is, for this case:
2099 verify = header_sender/callout=defer_ok
2101 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2102 those file descriptors could be used for SMTP connections. If anything
2103 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2104 could be sent to the SMTP client, causing chaos. The daemon now opens
2105 stdin, stdout, and stderr to /dev/null when it puts itself into the
2108 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2109 log by default. The user can override this with suitable Perl magic.
2111 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2112 the log message when discard triggers, was not working for the DATA ACL or
2113 for the non-SMTP ACL.
2115 78. Error message wording change in sieve.c.
2117 79. If smtp_accept_max_per_host was set, the number of connections could be
2118 restricted to fewer than expected, because the daemon was trying to set up
2119 a new connection before checking whether the processes handling previous
2120 connections had finished. The check for completed processes is now done
2121 earlier. On busy systems, this bug wouldn't be noticed because something
2122 else would have woken the daemon, and it would have reaped the completed
2125 80. If a message was submitted locally by a user whose login name contained one
2126 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2127 It caused a spool format error. I have fixed the spool reading code. A
2128 related problem was that the "from" clause in the Received: line became
2129 illegal because of the space(s). It is now covered by ${quote_local_part.
2131 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2134 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2136 83. Patch from Sieve maintainer to fix unterminated string problem in
2137 "vacation" handling.
2139 84. Some minor changes to the Linux configuration files to help with other
2140 OS variants using glibc.
2142 85. One more patch for Sieve to update vacation handling to latest spec.
2145 ----------------------------------------------------
2146 See the note above about the 4.44 and 4.50 releases.
2147 ----------------------------------------------------
2153 1. Change 4.43/35 introduced a bug that caused file counts to be
2154 incorrectly computed when quota_filecount was set in an appendfile
2157 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2158 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2161 3. Give more explanation in the error message when the command for a transport
2162 filter fails to execute.
2164 4. There are several places where Exim runs a non-Exim command in a
2165 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2166 was being done only for the command run by the queryprogram router. It is
2167 now done for all such subprocesses. The other cases are: ${run, transport
2168 filters, and the commands run by the lmtp and pipe transports.
2170 5. Some older OS have a limit of 256 on the maximum number of file
2171 descriptors. Exim was using setrlimit() to set 1000 as a large value
2172 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2173 systems. I've change it so that if it can't get 1000, it tries for 256.
2175 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2176 was an oversight, and furthermore, ever since the addition of extra
2177 controls (e.g. 4.43/32), the checks on when to allow different forms of
2178 "control" were broken. There should now be diagnostics for all cases when a
2179 control that does not make sense is encountered.
2181 7. $recipients is now available in the predata ACL (oversight).
2183 8. Tidy the search cache before the fork to do a delivery from a message
2184 received from the command line. Otherwise the child will trigger a lookup
2185 failure and thereby defer the delivery if it tries to use (for example) a
2186 cached ldap connection that the parent has called unbind on.
2188 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2189 of $address_data from the recipient verification was clobbered by the
2190 sender verification.
2192 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2193 was its contents. (It was OK if the option was not defined at all.)
2195 11. A "Completed" log line is now written for messages that are removed from
2196 the spool by the -Mrm option.
2198 12. $host_address is now set to the target address during the checking of
2199 ignore_target_hosts.
2201 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2202 being passed; this would have caused $sender_host_name to have been used if
2203 matching the list had actually called for a host name (not very likely,
2204 since this list is usually IP addresses). A host name is now passed as
2207 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2208 code that specifies a non-restarting handler (typically sigaction() in
2209 modern systems) in an attempt to fix a rare and obscure crash bug.
2211 15. Narrowed the window for a race in the daemon that could cause it to ignore
2212 SIGCHLD signals. This is not a major problem, because they are used only to
2213 wake it up if nothing else does.
2215 16. A malformed maildirsize file could cause Exim to calculate negative values
2216 for the mailbox size or file count. Odd effects could occur as a result.
2217 The maildirsize information is now recalculated if the size or filecount
2220 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2221 support for a long time. Removed HAVE_SYS_VFS_H.
2223 18. Updated exipick to current release from John Jetmore.
2225 19. Allow an empty sender to be matched against a lookup in an address list.
2226 Previously the only cases considered were a regular expression, or an
2229 20. Exim went into a mad DNS lookup loop when doing a callout where the
2230 host was specified on the transport, if the DNS lookup yielded more than
2233 21. The RFC2047 encoding function was originally intended for short strings
2234 such as real names; it was not keeping to the 75-character limit for
2235 encoded words that the RFC imposes. It now respects the limit, and
2236 generates multiple encoded words if necessary. To be on the safe side, I
2237 have increased the buffer size for the ${rfc2047: expansion operator from
2240 22. Failure to deliver a bounce message always caused it to be frozen, even if
2241 there was an errors_to setting on the router. The errors_to setting is now
2244 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2245 canonical form (fully expanded) before being placed in
2246 $sender_host_address.
2248 24. Updated eximstats to version 1.33
2250 25. Include certificate and key file names in error message when GnuTLS fails
2251 to set them up, because the GnuTLS error message doesn't include the name
2252 of the failing file when there is a problem reading it.
2254 26. Expand error message when OpenSSL has problems setting up cert/key files.
2257 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2258 (this can affect the format of dates).
2260 28. exim_tidydb, when checking for the continued existence of a message for
2261 which it has found a message-specific retry record, was not finding
2262 messages that were in split spool directories. Consequently, it was
2263 deleting retry records that should have stayed in existence.
2265 29. eximstats updated to version 1.35
2266 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2267 1.35 - bugfix such that pie charts by volume are generated correctly
2269 30. The SPA authentication driver was not abandoning authentication and moving
2270 on to the next authenticator when an expansion was forced to fail,
2271 contradicting the general specification for all authenticators. Instead it
2272 was generating a temporary error. It now behaves as specified.
2274 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2275 (the order specifies the preference for clients). The order is now AES256,
2276 AES128, 3DES, ARCFOUR128.
2278 31. Small patch to Sieve code - explicitly set From: when generating an
2281 32. Exim crashed if a remote delivery caused a very long error message to be
2282 recorded - for instance if somebody sent an entire SpamAssassin report back
2283 as a large number of 550 error lines. This bug was coincidentally fixed by
2284 increasing the size of one of Exim's internal buffers (big_buffer) that
2285 happened as part of the Exiscan merge. However, to be on the safe side, I
2286 have made the code more robust (and fixed the comments that describe what
2289 33. Some experimental protocols are using DNS PTR records for new purposes. The
2290 keys for these records are domain names, not reversed IP addresses. The
2291 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2292 leaves it alone. Component reversal etc. now happens only for IP addresses.
2295 34. The host_aton() function is supposed to be passed a string that is known
2296 to be a valid IP address. However, in the case of IPv6 addresses, it was
2297 not checking this. This is a hostage to fortune. Exim now panics and dies
2298 if the condition is not met. A case was found where this could be provoked
2299 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2300 components; fortuitously, this particular loophole had already been fixed
2301 by change 4.50/55 or 4.44/33 above.
2303 If there are any other similar loopholes, the new check in host_aton()
2304 itself should stop them being exploited. The report I received stated that
2305 data on the command line could provoke the exploit when Exim was running as
2306 exim, but did not say which command line option was involved. All I could
2307 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2308 running as the user.
2311 35. There was a buffer overflow vulnerability in the SPA authentication code
2312 (which came originally from the Samba project). I have added a test to the
2313 spa_base64_to_bits() function which I hope fixes it.
2316 36. The daemon start-up calls getloadavg() while still root for those OS that
2317 need the first call to be done as root, but it missed one case: when
2318 deliver_queue_load_max is set with deliver_drop_privilege. This is
2319 necessary for the benefit of the queue runner, because there is no re-exec
2320 when deliver_drop_privilege is set.
2322 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2323 was in use, was not putting the data itself into the right store pool;
2324 consequently, it could be overwritten for a subsequent message in the same
2325 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2328 38. Sometimes the final signoff response after QUIT could fail to get
2329 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2330 < 0 before doing a fflush(). This bug looks as though it goes back to the
2331 introduction of TLS in release 3.20, but "sometimes" must have been rare
2332 because the tests only now provoked it.
2338 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2339 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2340 Now it returns an integer. A number of calls were still expecting a T/F
2341 return. Fortuitously, in all cases, the tests worked in OK situations,
2342 which is the norm. However, things would have gone wrong on any write
2343 failures on the smtp file descriptor. This function is used when sending
2344 messages over SMTP and also when doing verify callouts.
2346 2. When Exim is called to do synchronous delivery of a locally submitted
2347 message (the -odf or -odi options), it no longer closes stderr before doing
2350 3. Implemented the mua_wrapper option.
2352 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2354 5. Implemented the functions header_remove(), header_testname(),
2355 header_add_at_position(), and receive_remove_recipient(), and exported them
2358 6. If an ACL "warn" statement specified the addition of headers, Exim already
2359 inserted X-ACL-Warn: at the start if there was no header name. However, it
2360 was not making this test for the second and subsequent header lines if
2361 there were newlines in the string. This meant that an invalid header could
2362 be inserted if Exim was badly configured.
2364 7. Allow an ACL "warn" statement to add header lines at the start or after all
2365 the Received: headers, as well as at the end.
2367 8. Added the rcpt_4xx retry error code.
2369 9. Added postmaster_mailfrom=xxx to callout verification option.
2371 10. Added mailfrom=xxxx to the callout verification option, for verify=
2374 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2375 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2377 12. Inserted some casts to stop certain compilers warning when using pointer
2378 differences as field lengths or precisions in printf-type calls (mostly
2379 affecting debugging statements).
2381 13. Added optional readline() support for -be (dynamically loaded).
2383 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2384 same clock tick as a message's arrival, so that its received time was the
2385 same as the "first fail" time on the retry record, and that message
2386 remained on the queue past the ultimate address timeout, every queue runner
2387 would try a delivery (because it was past the ultimate address timeout) but
2388 after another failure, the ultimate address timeout, which should have then
2389 bounced the address, did not kick in. This was a "< instead of <=" error;
2390 in most cases the first failure would have been in the next clock tick
2391 after the received time, and all would be well.
2393 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2394 being recognized when the domain list was tested by the match_domain
2395 condition in an expansion string.
2397 16. Added the ${str2b64: operator.
2399 17. Exim was always calling setrlimit() to set a large limit for the number of
2400 processes, without checking whether the existing limit was already
2401 adequate. (It did check for the limit on file descriptors.) Furthermore,
2402 errors from getrlimit() and setrlimit() were being ignored. Now they are
2403 logged to the main and panic logs, but Exim does carry on, to try to do its
2404 job under whatever limits there are.
2406 18. Imported PCRE 5.0.
2408 19. Trivial typo in log message " temporarily refused connection" (the leading
2411 20. If the log selector return_path_on_delivery was set and an address was
2412 redirected to /dev/null, the delivery process crashed because it assumed
2413 that a return path would always be set for a "successful" delivery. In this
2414 case, the whole delivery is bypassed as an optimization, and therefore no
2417 21. Internal re-arrangement: the function for sending a challenge and reading
2418 a response while authentication was assuming a zero-terminated challenge
2419 string. It's now changed to take a pointer and a length, to allow for
2420 binary data in such strings.
2422 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2424 23. Exim was not respecting finduser_retries when seeking the login of the
2425 uid under which it was called; it was always trying 10 times. (The default
2426 setting of finduser_retries is zero.) Also, it was sleeping after the final
2427 failure, which is pointless.
2429 24. Implemented tls_on_connect_ports.
2431 25. Implemented acl_smtp_predata.
2433 26. If the domain in control=submission is set empty, Exim assumes that the
2434 authenticated id is a complete email address when it generates From: or
2435 Sender: header lines.
2437 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2438 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2439 chown and chgrp in /bin and hostname in /usr/bin.
2441 28. Exim was keeping the "process log" file open after each use, just as it
2442 does for the main log. This opens the possibility of it remaining open for
2443 long periods when the USR1 signal hits a daemon. Occasional processlog
2444 errors were reported, that could have been caused by this. Anyway, it seems
2445 much more sensible not to leave this file open at all, so that is what now
2448 29. The long-running daemon process does not normally write to the log once it
2449 has entered its main loop, and it closes the log before doing so. This is
2450 so that log files can straightforwardly be renamed and moved. However,
2451 there are a couple of unusual error situations where the daemon does write
2452 log entries, and I had neglected to close the log afterwards.
2454 30. The text of an SMTP error response that was received during a remote
2455 delivery was being truncated at 512 bytes. This is too short for some of
2456 the long messages that one sometimes sees. I've increased the limit to
2459 31. It is now possible to make retry rules that apply only when a message has a
2460 specific sender, in particular, an empty sender.
2462 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2463 it possible to be selective about when SMTP synchronization is enforced.
2465 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2467 32. Implemented hosts_connection_nolog.
2469 33. Added an ACL for QUIT.
2471 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2474 35. Added mailbox_size and mailbox_filecount to appendfile.
2476 36. Added control = no_multiline_responses to ACLs.
2478 37. There was a bug in the logic of the code that waits for the clock to tick
2479 in the case where the clock went backwards by a substantial amount such
2480 that the microsecond fraction of "now" was more than the microsecond
2481 fraction of "then" (but the whole seconds number was less).
2483 38. Added support for the libradius Radius client library this is found on
2484 FreeBSD (previously only the radiusclient library was supported).
2490 1. When certain lookups returned multiple values in the form name=value, the
2491 quoting of the values was not always being done properly. Specifically:
2492 (a) If the value started with a double quote, but contained no whitespace,
2494 (b) If the value contained whitespace other than a space character (i.e.
2495 tabs or newlines or carriage returns) it was not quoted.
2496 This fix has been applied to the mysql and pgsql lookups by writing a
2497 separate quoting function and calling it from the lookup code. The fix
2498 should probably also be applied to nisplus, ibase and oracle lookups, but
2499 since I cannot test any of those, I have not disturbed their existing code.
2501 2. A hit in the callout cache for a specific address caused a log line with no
2502 reason for rejecting RCPT. Now it says "Previous (cached) callout
2503 verification failure".
2505 3. There was an off-by-one bug in the queryprogram router. An over-long
2506 return line was truncated at 256 instead of 255 characters, thereby
2507 overflowing its buffer with the terminating zero. As well as fixing this, I
2508 have increased the buffer size to 1024 (and made a note to document this).
2510 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2511 when Exim is waiting for an SMTP response from a remote server, Exim
2512 restarts its select() call on the socket, thereby resetting its timeout.
2513 This is not a problem when such interrupts are rare. Somebody set up a cron
2514 job to run exiwhat every 2 minutes, which is less than the normal select()
2515 timeout (5 or 10 minutes). This meant that the select() timeout never
2516 kicked in because it was always reset. I have fixed this by comparing the
2517 time when an interrupt arrives with the time at the start of the first call
2518 to select(). If more time than the timeout has elapsed, the interrupt is
2519 treated as a timeout.
2521 5. Some internal re-factoring in preparation for the addition of Sieve
2522 extensions (by MH). In particular, the "personal" test is moved to a
2523 separate function, and given an option for scanning Cc: and Bcc: (which is
2524 not set for Exim filters).
2526 6. When Exim created an email address using the login of the caller as the
2527 local part (e.g. when creating a From: or Sender: header line), it was not
2528 quoting the local part when it contained special characters such as @.
2530 7. Installed new OpenBSD configuration files.
2532 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2533 try to make them clearer.
2535 9. Callout options, other than the timeout value, were being ignored when
2536 verifying sender addresses in header lines. For example, when using
2538 verify = header_sender/callout=no_cache
2540 the cache was (incorrectly) being used.
2542 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2543 only the Cygwin environment.
2545 11. When return_path_on_delivery was set as a log selector, if different remote
2546 addresses in the same message used different return paths and parallel
2547 remote delivery occurred, the wrong values would sometimes be logged.
2548 (Whenever a remote delivery process finished, the return path value from
2549 the most recently started remote delivery process was logged.)
2551 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2552 lines when AUTH and/or TLS are in use. This is the "received protocol"
2553 field. Exim used to use "asmtp" for authenticated SMTP, without any
2554 indication (in the protocol name) for TLS use. Now it follows the RFC and
2555 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2556 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2557 names appear in log lines as well as in Received: header lines.
2559 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2560 extensions, and comparison tests, and to fix some bugs.
2562 14. Changes to the "personal" filter test:
2564 (1) The test was buggy in that it was just doing the equivalent of
2565 "contains" tests on header lines. For example, if a user's address was
2566 anne@some.where, the "personal" test would incorrectly be true for
2568 To: susanne@some.where
2570 This test is now done by extracting each address from the header in turn,
2571 and checking the entire address. Other tests that are part of "personal"
2572 are now done using regular expressions (for example, to check local parts
2573 of addresses in From: header lines).
2575 (2) The list of non-personal local parts in From: addresses has been
2576 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2577 taken from the Sieve specification recommendations.
2579 (3) If the message contains any header line starting with "List-" it is
2580 treated as non-personal.
2582 (4) The test for "circular" in the Subject: header line has been removed
2583 because it now seems ill-conceived.
2585 15. Minor typos in src/EDITME comments corrected.
2587 16. Installed latest exipick from John Jetmore.
2589 17. If headers_add on a router specified a text string that was too long for
2590 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2591 of string_sprintf() is now avoided.
2593 18. $message_body_size was not set (it was always zero) when running the DATA
2594 ACL and the local_scan() function.
2596 19. For the "mail" command in an Exim filter, no default was being set for
2597 the once_repeat time, causing a random time value to be used if "once" was
2598 specified. (If the value happened to be <= 0, no repeat happened.) The
2599 default is now 0s, meaning "never repeat". The "vacation" command was OK
2600 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2601 (I found it when inspecting the code).
2603 20. There is now an overall timeout for performing a callout verification. It
2604 defaults to 4 times the callout timeout, which applies to individual SMTP
2605 commands during the callout. The overall timeout applies when there is more
2606 than one host that can be tried. The timeout is checked before trying the
2607 next host. This prevents very long delays if there are a large number of
2608 hosts and all are timing out (e.g. when the network connections are timing
2609 out). The value of the overall timeout can be changed by specifying an
2610 additional sub-option for "callout", called "maxwait". For example:
2612 verify = sender/callout=5s,maxwait=20s
2614 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2615 to the end before writing, but this should make it even safer).
2617 22. Exim was forgetting that it had advertised PIPELINING for the second and
2618 subsequent messages on an SMTP connection. It was also not resetting its
2619 memory on STARTTLS and an internal HELO.
2621 23. When Exim logs an SMTP synchronization error within a session, it now
2622 records whether PIPELINING has been advertised or not.
2624 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2625 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2626 rather than long int.
2628 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2630 26. Added the never_mail option to autoreply.
2636 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2637 crash if the getsockname() call failed; this can happen if a connection is
2638 closed very soon after it is established. The problem was simply in the
2639 order in which certain operations were done, causing Exim to try to write
2640 to the SMTP stream before it had set up the file descriptor. The bug has
2641 been fixed by making things happen in the correct order.
2647 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2648 before the connection was closed, thus losing the rejection response.
2650 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2651 some early Solaris releases, but causes trouble in current releases where
2652 socklen_t is defined.
2654 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2657 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2660 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2661 that releasing the top of it at the end releases what was used for sub-
2662 expansions (unless the block got too big). However, discard this block if
2663 the first thing is a variable or header, so that we can use its block when
2664 it is dynamic (useful for very large $message_headers, for example).
2666 6. Lookups now cache *every* query, not just the most recent. A new, separate
2667 store pool is used for this. It can be recovered when all lookup caches are
2668 flushed. Lookups now release memory at the end of their result strings.
2669 This has involved some general refactoring of the lookup sources.
2671 7. Some code has been added to the store_xxx() functions to reduce the amount
2672 of flapping under certain conditions.
2674 8. log_incoming_interface used to affect only the <= reception log lines. Now
2675 it causes the local interface and port to be added to several more SMTP log
2676 lines, for example "SMTP connection from", and rejection lines.
2678 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2680 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2682 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2683 could be overwritten at the end of the current message (or the start of a
2684 new message if it was set in a HELO ACL). The value is now preserved for
2685 the duration of the SMTP connection.
2687 12. If a transport had a headers_rewrite setting, and a matching header line
2688 contained an unqualified address, that address was qualified, even if it
2689 did not match any rewriting rules. The underlying bug was that the values
2690 of the flags that permit the existence of unqualified sender and recipient
2691 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2692 non-local messages, and by -bnq for local messages) were not being
2693 preserved with the message after it was received.
2695 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2696 "next input=" as part of the text comprising the host identity instead of
2697 the correct text. The code was using the same buffer for two different
2698 strings. However, depending on which order the printing function evaluated
2699 its arguments, the bug did not always show up. Under Linux, for example, my
2700 test suite worked just fine.
2702 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2703 doesn't work with some older versions of Perl. It has been changed to "my",
2704 which in any case is probably the better facility to use.
2706 15. A really picky compiler found some instances of statements for creating
2707 error messages that either had too many or two few arguments for the format
2710 16. The size of the buffer for calls to the DNS resolver has been increased
2711 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2712 for addresses that have a lot of PTR records. This alleviates a problem; it
2713 does not fully solve it.
2715 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2716 buffer now truncates the list and logs the incident, which is the same
2717 action as happens when Exim is looking up a host name and its aliases.
2718 Previously in this situation something unpredictable would happen;
2719 sometimes it was "internal error: store_reset failed".
2721 18. If a server dropped the connection unexpectedly when an Exim client was
2722 using GnuTLS and trying to read a response, the client delivery process
2723 crashed while trying to generate an error log message.
2725 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2726 string, for example:
2728 warn message = H1: something\nH2: something
2730 the text was added as a single header line from Exim's point of view
2731 though it ended up OK in the delivered message. However, searching for the
2732 second and subsequent header lines using $h_h2: did not work. This has been
2733 fixed. Similarly, if a system filter added multiple headers in this way,
2734 the routers could not see them.
2736 20. Expanded the error message when iplsearch is called with an invalid key to
2737 suggest using net-iplsearch in a host list.
2739 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2740 ACLs are no longer actually imposed (and a message to that effect is
2743 22. If a "gecos" field in a passwd entry contained escaped characters, in
2744 particular, if it contained a \" sequence, Exim got it wrong when building
2745 a From: or a Sender: header from that name. A second bug also caused
2746 incorrect handling when an unquoted " was present following a character
2747 that needed quoting.
2749 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2750 was not being matched caselessly.
2752 24. Arranged for all hyphens in the exim.8 source to be escaped with
2755 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2756 properly. Recipient callout cache records were still being keyed to include
2757 the sender, even when use_sender was set false. This led to far more
2758 callouts that were necessary. The sender is no longer included in the key
2759 when use_sender is false.
2761 26. Added "control = submission" modifier to ACLs.
2763 27. Added the ${base62d: operator to decode base 62 numbers.
2765 28. dnsdb lookups can now access SRV records.
2767 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2768 the configuration file.
2770 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2771 (-v) mode. This makes the output for a verbose queue run more intelligible.
2773 31. Added a use_postmaster feature to recipient callouts.
2775 32. Added the $body_zerocount variable, containing the number of binary zero
2776 bytes in the message body.
2778 33. The time of last modification of the "new" subdirectory is now used as the
2779 "mailbox time last read" when there is a quota error for a maildir
2782 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2784 35. Added +ignore_unknown as a special item in host lists.
2786 36. Code for decoding IPv6 addresses in host lists is now included, even if
2787 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2788 address was recognized as an IP address, but was then not correctly decoded
2789 into binary, causing unexpected and incorrect effects when compared with
2796 1. Very minor rewording of debugging text in manualroute to say "list of
2797 hosts" instead of "hostlist".
2799 2. If verify=header_syntax was set, and a header line with an unqualified
2800 address (no domain) and a large number of spaces between the end of the
2801 name and the colon was received, the reception process suffered a buffer
2802 overflow, and (when I tested it) crashed. This was caused by some obsolete
2803 code that should have been removed. The fix is to remove it!
2805 3. When running in the test harness, delay a bit after writing a bounce
2806 message to get a bit more predictability in the log output.
2808 4. Added a call to search_tidyup() just before forking a reception process. In
2809 theory, someone could use a lookup in the expansion of smtp_accept_max_
2810 per_host which, without the tidyup, could leave open a database connection.
2812 5. Added the variables $recipient_data and $sender_data which get set from a
2813 lookup success in an ACL "recipients" or "senders" condition, or a router
2814 "senders" option, similar to $domain_data and $local_part_data.
2816 6. Moved the writing of debug_print from before to after the "senders" test
2819 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2820 problems for message scanning, either using a data ACL, or using
2821 local_scan() because the Received: header was not generated till after they
2822 were called (in order to set the time as the time of reception completion).
2823 I have revised the way this works. The header is now generated after the
2824 body is received, but before the ACL or local_scan() are called. After they
2825 are run, the timestamp in the header is updated.
2831 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2832 before starting a queue runner without re-exec. This happened only when
2833 deliver_drop_privilege was set or when the Exim user was set to root. The
2834 effect of the bug was that timeouts during subsequent deliveries caused
2835 crashes instead of being properly handled. The handler is now left at its
2836 default (and expected) setting.
2838 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2839 message, again when deliver_drop_privilege is set or Exim is run as root.
2840 The bug described in (1) was not present in this case, but the tidying up
2841 of the other signals was missing. I have made the two cases consistent.
2843 3. The ignore_target_hosts setting on a manualroute router was being ignored
2844 for hosts that were looked up using the /MX notation.
2846 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2849 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2850 operated on the sender address. After changing the $sender_address to <>
2851 for the sender address verify, Exim was re-instated it as the original
2852 (before rewriting) address, but remembering that it had rewritten it, so it
2853 wasn't rewriting it again. This bug also had the effect of breaking the
2854 sender address verification caching when the sender address was rewritten.
2856 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2857 This has been changed so that if the ip literal address matches
2858 ignore_target_hosts, the router declines.
2860 7. Added expansion conditions match_domain, match_address, and match_local_
2861 part (NOT match_host).
2863 8. The placeholder for the Received: header didn't have a length field set.
2865 9. Added code to Exim itself and to exim_lock to test for a specific race
2866 condition that could lead to file corruption when using MBX delivery. The
2867 issue is with the lockfile that is created in /tmp. If this file is removed
2868 after a process has opened it but before that process has acquired a lock,
2869 there is the potential for a second process to recreate the file and also
2870 acquire a lock. This could lead to two Exim processes writing to the file
2871 at the same time. The added code performs the same test as UW imapd; it
2872 checks after acquiring the lock that its file descriptor still refers to
2873 the same named file.
2875 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2876 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2879 11. Added the smtp_active_hostname option. If used, this will typically be made
2880 to depend on the incoming interface address. Because $interface_address is
2881 not set up until the daemon has forked a reception process, error responses
2882 that can happen earlier (such as "too many connections") no longer contain
2885 12. If an expansion in a condition on a "warn" statement fails because a lookup
2886 defers, the "warn" statement is abandoned, and the next ACL statement is
2887 processed. Previously this caused the whole ACL to be aborted.
2889 13. Added the iplsearch lookup type.
2891 14. Added ident_timeout as a log selector.
2893 15. Added tls_certificate_verified as a log selector.
2895 16. Added a global option tls_require_ciphers (compare the smtp transport
2896 option of the same name). This controls incoming TLS connections.
2898 17. I finally figured out how to make tls_require_ciphers do a similar thing
2899 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2900 before starting the TLS session.
2902 18. Tabs are now shown as \t in -bP output.
2904 19. If the log selector return_path_on_delivery was set, Exim crashed when
2905 bouncing a message because it had too many Received: header lines.
2907 20. If two routers both had headers_remove settings, and the first one included
2908 a superfluous trailing colon, the final name in the first list and the
2909 first name in the second list were incorrectly joined into one item (with a
2910 colon in the middle).
2916 1. Added -C and -D options to the exinext utility, mainly to make it easier
2917 to include in the automated testing, but these could be helpful when
2918 multiple configurations are in use.
2920 2. The exinext utility was not formatting the output nicely when there was
2921 an alternate port involved in the retry record key, nor when there was a
2922 message id as well (for retries that were specific to a specific message
2923 and a specific host). It was also confused by IPv6 addresses, because of
2924 the additional colons they contain. I have fixed the IPv4 problem, and
2925 patched it up to do a reasonable job for IPv6.
2927 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2928 delivery, the log line now contains "pipelined" if PIPELINING was used.
2930 4. An SMTP transport process used to panic and die if the bind() call to set
2931 an explicit outgoing interface failed. This has been changed; it is now
2932 treated in the same way as a connect() failure.
2934 5. A reference to $sender_host_name in the part of a conditional expansion
2935 that was being skipped was still causing a DNS lookup. This no longer
2938 6. The def: expansion condition was not recognizing references to header lines
2939 that used bh_ and bheader_.
2941 7. Added the _cache feature to named lists.
2943 8. The code for checking quota_filecount in the appendfile transport was
2944 allowing one more file than it should have been.
2946 9. For compatibility with Sendmail, the command line option
2954 and sets the incoming protocol and host name (for trusted callers). The
2955 host name and its colon can be omitted when only the protocol is to be set.
2956 Note the Exim already has two private options, -pd and -ps, that refer to
2957 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2958 "s", but I don't think that's a major issue.
2960 10. A number of refactoring changes to the code, none of which should affect
2963 (a) The number of logging options was getting close to filling up the
2964 32-bit word that was used as a bit map. I have split them into two classes:
2965 those that are passed in the argument to log_write(), and those that are
2966 only ever tested independently outside of that function. These are now in
2967 separate 32-bit words, so there is plenty of room for expansion again.
2968 There is no change in the user interface or the logging behaviour.
2970 (b) When building, for example, log lines, the code previously used a
2971 macro that called string_cat() twice, in order to add two strings. This is
2972 not really sufficiently general. Furthermore, there was one instance where
2973 it was actually wrong because one of the argument was used twice, and in
2974 one call a function was used. (As it happened, calling the function twice
2975 did not affect the overall behaviour.) The macro has been replaced by a
2976 function that can join an arbitrary number of extra strings onto a growing
2979 (c) The code for expansion conditions now uses a table and a binary chop
2980 instead of a serial search (which was left over from when there were very
2981 few conditions). Also, it now recognizes conditions like "pam" even when
2982 the relevant support is not compiled in: a suitably worded error message is
2983 given if an attempt is made to use such a condition.
2985 11. Added ${time_interval:xxxxx}.
2987 12. A bug was causing one of the ddress fields not to be passed back correctly
2988 from remote delivery subprocesses. The field in question was not being
2989 subsequently used, so this caused to problems in practice.
2991 13. Added new log selectors queue_time and deliver_time.
2993 14. Might have fixed a bug in maildirsizefile handling that threw up
2994 "unexpected character" debug warnings, and recalculated the data
2995 unnecessarily. In any case, I expanded the warning message to give more
2998 15. Added the message "Restricted characters in address" to the statements in
2999 the default ACL that block characters like @ and % in local parts.
3001 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3002 Three changes have been made:
3004 (a) There was a serious bug; a negative response to MAIL caused the whole
3005 recipient domain to be cached as invalid, thereby blocking all messages
3006 to all local parts at the same domain, from all senders. This bug has
3007 been fixed. The domain is no longer cached after a negative response to
3008 MAIL if the sender used is not empty.
3010 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3013 (c) A new callout option, "use_sender" has been added for people who want
3014 the modified behaviour.
3020 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3023 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3024 indeed breaks things for older releases.
3026 3. Added additional logging to the case where there is a problem reading data
3027 from a filter that is running in a subprocess using a pipe, in order to
3028 try to track down a specific problem.
3030 4. Testing facility fudge: when running in the test harness and attempting
3031 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3032 getting "No route to host". Convert this to a timeout.
3034 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3037 6. Some OS don't have socklen_t but use size_t instead. This affects the
3038 fifth argument of getsockopt() amongst other things. This is now
3039 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3040 can be set for individual OS. I have set it for SunOS5, OSF1, and
3041 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3042 some earlier ones do not.
3044 7. Change 4.30/15 was not doing the test caselessly.
3046 8. The standard form for an IPv6 address literal was being rejected by address
3047 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3048 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3049 this, as well as the form without the "IPv6" on the front (but only when
3050 address literals are enabled, of course).
3052 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3054 10. Exim crashed if a message with an empty sender address specified by -f
3055 encountered a router with an errors_to setting. This could be provoked only
3056 by a command such as
3060 where an empty string was supplied; "<>" did not hit this bug.
3062 11. Installed PCRE release 4.5.
3064 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3065 remained set. It is now erased.
3067 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3068 times from message ids (which are base 36 rather than the normal 62).
3070 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3071 were being counted as actual protocol errors, and logged if the log
3072 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3073 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3074 and DATA following a set of rejected RCPTs do not count as protocol errors.
3075 In other words, Exim assumes they were pipelined, though this may not
3076 actually be the case. Of course, in all cases the client gets an
3077 appropriate error code.
3079 15. If a lookup fails in an ACL condition, a message about the failure may
3080 be available; it is used if testing the ACL cannot continue, because most
3081 such messages specify what the cause of the deferral is. However, some
3082 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3083 that caused an old message to be retained and used if a later statement
3084 caused a defer, replacing the real cause of the deferral.
3086 16. If an IP address had so many PTR records that the DNS lookup buffer
3087 was not large enough to hold them, Exim could crash while trying to process
3088 the truncated data. It now detects and logs this case.
3090 17. Further to 4.21/58, another change has been made: if (and only if) the
3091 first line of a message (the first header line) ends with CRLF, a bare LF
3092 in a subsequent header line has a space inserted after it, so as not to
3093 terminate the header.
3095 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3096 unnecessarily, used atoi() instead of strtol(), and didn't check the
3097 termination when getting file sizes from file names by regex.
3099 19. Completely re-implemented the support for maildirsize files, in the light
3100 of a number of problems with the previous contributed implementation
3101 (4.30/29). In particular:
3103 . If the quota is zero, the maildirsize file is maintained, but no quota is
3106 . If the maildir directory does not exist, it is created before any attempt
3107 to write a maildirsize file.
3109 . The quota value in the file is just a cache; if the quota is changed in
3110 the transport, the new value overrides.
3112 . A regular expression is available for excluding directories from the
3115 20. The autoreply transport checks the characters in options that define the
3116 message's headers; it allows continued headers, but it was checking with
3117 isspace() after an embedded newline instead of explicitly looking for a
3120 21. If all the "regular" hosts to which an address was routed had passed their
3121 expiry times, and had not reached their retry times, the address was
3122 bounced, even if fallback hosts were defined. Now Exim should go on to try
3125 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3126 equivalent code in the SMTP transport. Some hosts send humungous responses
3127 to HELO/EHLO, more than 1024 it seems.
3129 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3130 gives compiler warnings in some environments. I've now done it "properly",
3133 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3134 (because of problems with the built-in one) was declared to return uschar *
3135 instead of char *, causing compiler failure.
3137 25. Fixed a file descriptor leak when processing alias/forward files.
3139 26. Fixed a minor format string issue in dbfn.c.
3141 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3143 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3144 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3147 29. When a sender address is verified, it is cached, to save repeating the test
3148 when there is more than one recipient in a message. However, when the
3149 verification involves a callout, it is possible for different callout
3150 options to be set for different recipients. It is too complicated to keep
3151 track of this in the cache, so now Exim always runs a verification when a
3152 callout is required, relying on the callout cache for the optimization.
3153 The overhead is duplication of the address routing, but this should not be
3156 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3157 to be verified with callout=postmaster, and the main callout worked but the
3158 postmaster check failed, the verification correctly failed. However, if a
3159 subsequent RCPT command asked for sender verification *without* the
3160 postmaster check, incorrect caching caused this verification also to fail,
3163 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3164 it was not caching the DNS options (qualify_single, search_parents) that
3165 were used when the lookup failed. A subsequent lookup with different
3166 options therefore always gave the same answer, though there were cases
3167 where it should not have. (Example: a "domains = !$mx_any" option on a
3168 dnslookup router: the "domains" option is always processed without any
3169 widening, but the router might have qualify_single set.) Now Exim uses the
3170 cached value only when the same options are set.
3172 32. Added John Jetmore's "exipick" utility to the distribution.
3174 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3175 than a timeout (e.g. a certificate is required, and is not provided), an
3176 Exim server now closes the connection immediately. Previously it waited for
3177 the client to close - but if the client is SSL, it seems that they each
3178 wait for each other, leading to a delay before one of them times out.
3180 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3181 maintained 0.8.x compatibility because I don't think many are using it, and
3182 it is clearly obsolete.
3184 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3187 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3188 client certificate was expired. A simple patch fixes this, though I don't
3189 understand the full logic of why the verify callback is called multiple
3192 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3193 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3194 which causes problems with some clients (such as the Certicom SSL Plus
3195 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3196 disables the coutermeasure allowing Eudora to connect."
3198 38. Exim was not checking that a write() to a log file succeeded. This could
3199 lead to Bad Things if a log got too big, in particular if it hit a file
3200 size limit. Exim now panics and dies if it cannot write to a log file, just
3201 as it does if it cannot open a log file.
3203 39. Modified OS/Makefile-Linux so that it now contains
3205 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3207 The two -D definitions ensure that Exim is compiled with large file
3208 support, which makes it possible to handle log files that are bigger than
3211 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3212 instance) a domain was checked against a named list that involved a lookup,
3213 causing $domain_data to be set, then another domain was checked against the
3214 same list, then the first domain was re-checked, the value of $domain_data
3215 after the final check could be wrong. In particular, if the second check
3216 failed, it could be set empty. This bug probably also applied to
3219 41. The strip_trailing_dot option was not being applied to the address given
3220 with the -f command-line option.
3222 42. The code for reading a message's header from the spool was incrementing
3223 $received_count, but never initializing it. This meant that the value was
3224 incorrect (doubled) while delivering a message in the same process in which
3225 it was received. In the most common configuration of Exim, this never
3226 happens - a fresh exec is done - but it can happen when
3227 deliver_drop_privilege is set.
3229 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3230 it now includes up to 150 characters of the unexpected data in the log
3233 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3234 and building data strings. The size of both of these buffers was 10 000
3235 bytes - far larger than anybody would *ever* want, thought I. Needless to
3236 say, somebody hit the limit. I have increased the maximum line length to
3237 20 000 and the maximum data length of concatenated lines to 100 000. I have
3238 also fixed two bugs, because there was no checking on these buffers. Tsk,
3239 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3240 buffer is too small.
3242 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3243 lsearch lookups. Now it does.
3245 46. When parsing a route_list item in a manualroute router, a fixed-length
3246 buffer was used for the list of hosts. I made this 1024 bytes long,
3247 thinking that nobody would ever have a list of hosts that long. Wrong.
3248 Somebody had a whole pile of complicated expansion conditions, and the
3249 string was silently truncated, leading to an expansion error. It turns out
3250 that it is easier to change to an unlimited length (owing to other changes
3251 that have happened since this code was originally written) than to build
3252 structure for giving a limitation error. The length of the item that
3253 expands into the list of hosts is now unlimited.
3255 47. The lsearch lookup could not handle data where the length of text line was
3256 more than 4095 characters. Such lines were truncated, leading to shortened
3257 data being returned. It should now handle lines of any length.
3259 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3260 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3263 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3264 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3265 no longer happens in comment lines. A list of replacements is now placed
3266 at the head of all of the source files, except those whose only change is
3267 to replace PERL_COMMAND in the very first #! line.
3269 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3270 messages on the queue, with a bottom-up merge sort, using code contributed
3271 by Michael Haardt. This should make operations like -bp somewhat faster on
3272 large queues. It won't affect queue runners, except when queue_run_in_order
3275 51. Installed eximstats 1.31 in the distribution.
3277 52. Added support for SRV lookups to the dnslookup router.
3279 53. If an ACL referred to $message_body or $message_body_end, the value was not
3280 reset for any messages that followed in the same SMTP session.
3282 54. The store-handling optimization for building very long strings was not
3283 differentiating between the different store pools. I don't think this
3284 actually made any difference in practice, but I've tidied it.
3286 55. While running the routers to verify a sender address, $sender_address
3287 was still set to the sender address. This is wrong, because when routing to
3288 send a bounce to the sender, it would be empty. Therefore, I have changed
3289 it so that, while verifying a sender address, $sender_address is set to <>.
3290 (There is no change to what happens when verifying a recipient address.)
3292 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3293 target A or AAAA records (if not already returned) without resetting the
3294 qualify_single or search_parents options of the DNS resolver. These are
3295 inappropriate in this case because the targets of MX and SRV records must
3296 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3297 target that, when qualified, matched something in the local domain. These
3298 two options are now turned off when doing these lookups.
3300 57. It seems that at least some releases of Reiserfs (which does not have the
3301 concept of a fixed number of inodes) returns zero and not -1 for the
3302 number of available inodes. This interacted badly with check_spool_inodes,
3303 which assumed that -1 was the "no such thing" setting. What I have done is
3304 to check that the total number of inodes is greater than zero before doing
3305 the test of how many are available.
3307 58. When a "warn" ACL statement has a log_message modifier, the message is
3308 remembered, and not repeated. This is to avoid a lot of repetition when a
3309 message has many recipients that cause the same warning to be written.
3310 Howewer, Exim was preserving the list of already written lines for an
3311 entire SMTP session, which doesn't seem right. The memory is now reset if a
3312 new message is started.
3314 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3315 debugging output unless log_rewrite was also set.
3317 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3318 of (int)(handle) when we know that handle contains (void *)(-1).
3320 61. The Exim daemon panic-logs an error return when it closes the incoming
3321 connection. However "connection reset by peer" seems to be common, and
3322 isn't really an error worthy of noting specially, so that particular error
3325 62. When Exim is trying to find all the local interfaces, it used to panic and
3326 die if the ioctl to get the interface flags failed. However, it seems that
3327 on at least one OS (Solaris 9) it is possible to have an interface that is
3328 included in the list of interfaces, but for which you get a failure error
3329 for this call. This happens when the interface is not "plumbed" into a
3330 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3331 failure of the "get flags" call assumes that the interface is down.
3333 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3334 makes life easier for people who are doing arithmetic on fields extracted
3335 from dates, where you often get leading zeros that should not be
3336 interpreted as octal.
3338 64. Added qualify_domain to the redirect router, to override the global
3341 65. If a pathologically long header line contained very many addresses (the
3342 report of this problem mentioned 10 000) and each of them was rewritten,
3343 Exim could use up a very large amount of memory. (It kept on making new
3344 copies of the header line as it rewrote, and never released the old ones.)
3345 At the expense of a bit more processing, the header rewriting function has
3346 been changed so that it no longer eats memory in this way.
3348 66. The generation of the Received: header has been moved from the time that a
3349 message starts to be received, to the time that it finishes. The timestamp
3350 in the Received: header should now be very close to that of the <= log
3351 line. There are two side-effects of this change:
3353 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3354 logged header lines no longer include the local Received: line, because
3355 it has not yet been created. The same applies to a copy of the message
3356 that is returned to a non-SMTP sender when a message is rejected.
3358 (b) When a filter file is tested using -bf, no additional Received: header
3359 is added to the test message. After some thought, I decided that this
3362 This change does not affect the value of $received_for. It is still set
3363 after address rewriting, but before local_scan() is called.
3365 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3367 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3368 gave an unhelpful panic error message, and a defer error. I have managed to
3369 change this behaviour so that it now rejects any supplied certificate,
3370 which seems right, as the list of acceptable certificates is empty.
3372 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3373 gave an unhelpful defer error. I have not managed to make this reject any
3374 supplied certificates, but the error message it gives is "no certificate
3375 supplied", which is not helpful.
3377 70. exigrep's output now also includes lines that are not associated with any
3378 message, but which match the given pattern. Implemented by a patch from
3379 Martin Sluka, which also tidied up the Perl a bit.
3381 71. Recipient callout verification, like sender verification, was using <> in
3382 the MAIL FROM command. This isn't really the right thing, since the actual
3383 sender may affect whether the remote host accepts the recipient or not. I
3384 have changed it to use the actual sender in the callout; this means that
3385 the cache record is now keyed on a recipient/sender pair, not just the
3386 recipient address. There doesn't seem to be a real danger of callout loops,
3387 since a callout by the remote host to check the sender would use <>.
3388 [SEE ABOVE: changed after hitting problems.]
3390 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3391 temporary errors. However, in the case of such a code being given after
3392 the end of a data transmission (i.e. after ".") Exim was failing to write
3393 a retry record for the message. (Yes, there was some broken host that was
3394 actually sending 8xx at this point.)
3396 73. An unknown lookup type in a host list could cause Exim to panic-die when
3397 the list was checked. (An example that provoked this was putting <; in the
3398 middle of a list instead of at the start.) If this happened during a DATA
3399 ACL check, a -D file could be left lying around. This kind of configuration
3400 error no longer causes Exim to die; instead it causes a defer errror. The
3401 incident is still logged to the main and panic logs.
3403 74. Buglet left over from Exim 3 conversion. The message "too many messages
3404 in one connection" was written to the rejectlog but not the mainlog, except
3405 when address rewriting (yes!) was being logged.
3407 75. Added write_rejectlog option.
3409 76. When a system filter was run not as root (that is, when system_filter_user
3410 was set), the values of the $n variables were not being returned to the
3411 main process; thus, they were not subsequently available in the $sn
3414 77. Added +return_path_on_delivery log selector.
3416 78. A connection timeout was being treated differently from recipients deferred
3417 when testing hosts_max_try with a message that was older than the host's
3418 retry timeout. (The host should not be counted, thus allowing all hosts to
3419 be tried at least once before bouncing.) This may have been the cause of an
3420 occasionally reported bug whereby a message would remain on the queue
3421 longer than the retry timeout, but would be bounced if a delivery was
3422 forced. I say "may" because I never totally pinned down the problem;
3423 setting up timeout/retry tests is difficult. See also the next item.
3425 79. The ultimate address timeout was not being applied to errors that involved
3426 a combination of host plus message (for example, a timeout on a MAIL
3427 command). When an address resolved to a number of possible hosts, and they
3428 were not all tried for each delivery (e.g. because of hosts_max_try), a
3429 message could remain on the queue longer than the retry timeout.
3431 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3434 81. Fixed an obscure SMTP outgoing bug which required at least the following
3435 conditions: (a) there was another message waiting for the same server;
3436 (b) the server returned 5xx to all RCPT commands in the first message so
3437 that the message was not completed; (c) the server dropped the connection
3438 or gave a negative response to the RSET that Exim sends to abort the
3439 transaction. The observed case was a dropped connection after DATA that had
3440 been sent in pipelining mode. That is, the server had advertised PIPELINING
3441 but was not implementing it correctly. The effect of the bug was incorrect
3442 behaviour, such as trying another host, and this could lead to a crash.
3448 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3449 and daemon.c were passed as pointers to ints; they should have been
3450 pointers to socklen_t variables (which are typically unsigned ints).
3452 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3455 3. Fixed a really odd bug that affected only the testing scheme; patching a
3456 certain fixed string in the binary changed the value of another string that
3457 happened to be identical to the end of the original first string.
3459 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3460 name", it returns that address as the IP address. On some operating
3461 systems (e.g. Solaris), it also passes back the IP address string as the
3462 "host name". However, on others (e.g. Linux), it passes back an empty
3463 string. Exim wasn't checking for this, and was changing the host name to an
3464 empty string, assuming it had been canonicized.
3466 5. Although rare, it is permitted to have more than one PTR record for a given
3467 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3468 all the names associated with an address, because they do in Solaris.
3469 However, it seems that they do not in Linux for data that comes from the
3470 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3471 I found this out when I moved to a new Linux workstation and tried to run
3472 the Exim test suite.
3474 To get round this problem I have changed the code so that it now does its
3475 own call to the DNS to look up PTR records when searching for a host name.
3476 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3477 addresses that are only in /etc/hosts are still found.
3479 This behaviour is, however, controlled by an option called host_lookup_
3480 order, which defaults to "bydns:byaddr". If people want to use the other
3481 order, or indeed, just use one or the other means of lookup, they can
3482 specify it in this variable.
3484 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3485 some operating systems, this comes back from gethostbyaddr() as an empty
3486 string, and this is what Exim used to test for. However, it seems that in
3487 other systems, "." is yielded. Exim now tests for this case too.
3489 7. The values of check_spool_space and check_log_space are now held internally
3490 as a number of kilobytes instead of an absolute number of bytes. If a
3491 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3492 kilobyte. This means that much larger values can be stored.
3494 8. Exim monitor: an attempt to get the action menu when not actually pointing
3495 at a message produces an empty menu entitled "No message selected". This
3496 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3497 no entries in it ("Shell widget menu has zero width and/or height"). So I
3498 have added a single, blank menu entry in this case.
3500 9. Added ${quote_local_part.
3502 10. MIME decoding is now applied to the contents of Subject: header lines when
3505 11. Now that a reference to $sender_host_address automatically causes a reverse
3506 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3507 host lookup before query-style lookups in lists that might use this
3508 variable. This has therefore been abolished, and the "net-" prefix is no
3509 longer necessary for query-style lookups.
3511 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3512 have been a typo for LFLAGS, so it has been changed.
3514 13. The install script calls Exim with "-C /dev/null" in order to find the
3515 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3516 to be output. Howeve, since Exim outputs its version number before the
3517 error, it didn't break the script. It just looked ugly. I fixed this by
3518 always allowing "-C /dev/null" if the caller is root.
3520 14. Ignore overlarge ACL variable number when reading spool file - insurance
3521 against a later release with more variables having written the file.
3523 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3524 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3525 this, as well as the form without the "IPv6" on the front.
3527 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3528 OS/Makefile-Darwin file.
3530 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3531 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3533 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3534 variable. However, some OS use ints for inodes. I've added cast to long int
3535 to get rid of the compiler warning.
3537 19. I had forgotten to lock out "/../" in configuration file names when
3538 ALT_CONFIG_PREFIX was set.
3540 20. Routers used for verification do not need to specify transports. However,
3541 if such a router generated a host list, and callout was configured, Exim
3542 crashed, because it could not find a port number from the (non-existent)
3543 transport. It now assumes port 25 in this circumstance.
3545 21. Added the -t option to exigrep.
3547 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3548 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3549 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3550 them is set, LOOKUP_LSEARCH is forced.
3552 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3554 24. Added sender and host information to the "rejected by local_scan()" log
3555 line; previously there was no indication of these.
3557 25. Added .include_if_exists.
3559 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3560 Linux. It turns out that not all file systems support this. Apparently some
3561 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3562 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3563 not supported on the file descriptor, is now ignored when Exim is trying to
3564 sync a directory. This applies only to Linux.
3566 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3568 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3569 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3572 29. Added support for maildirsize files from supplied patch (modified a bit).
3574 30. The use of :fail: followed by an empty string could lead Exim to respond to
3575 sender verification failures with (e.g.):
3577 550 Verification failed for <xxx>
3578 550 Sender verify failed
3580 where the first response line was missing the '-' that indicates it is not
3581 the final line of the response.
3583 31. The loop for finding the name of the user that called Exim had a hardwired
3584 limit of 10; it now uses the value of finduser_retries, which is used for
3585 all other user lookups.
3587 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3590 33. Exim was neglecting to zero errno before one call of strtol() when
3591 expanding a string and expecting an integer value. On some systems this
3592 resulted in spurious "integer overflow" errors. Also, it was casting the
3593 result into an int without checking.
3595 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3596 did not work. The code looks as if it has *never* worked, though it appears
3597 to have been documented since at least releast 1.62. I have made it work.
3599 35. The "timeout_DNS" error in retry rules, also documented since at least
3600 1.62, also never worked. As it isn't clear exactly what this means, and
3601 clearly it isn't a major issue, I have abolished the feature by treating it
3602 as "timeout", and writing a warning to the main and panic logs.
3604 36. The display of retry rules for -brt wasn't always showing the error code
3607 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3608 timeout_connect_A, timeout_connect_MX.
3610 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3611 to the empty sender.
3613 39. The daemon was not analysing the content of -oX till after it had closed
3614 stderr and disconnected from the controlling terminal. This meant that any
3615 syntax errors were only noted on the panic log, and the return code from
3616 the command was 0. By re-arranging the code a little, I've made the
3617 decoding happen first, so such errors now appear on stderr, and the return
3618 code is 1. However, the actual setting up of the sockets still happens in
3619 the disconnected process, so errors there are still only recorded on the
3622 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3623 connections (as happens on some IP stacks) was logged at start up time as
3624 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3625 it from "IPv6 and IPv4", which means that two separate sockets are being
3628 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3629 says whether AF_INET or AF_INET6 was passed as an argument.
3631 42. Exiwhat output was messed up when time zones were included in log
3634 43. Exiwhat now gives more information about the daemon's listening ports,
3635 and whether -tls-on-connect was used.
3637 44. The "port" option of the smtp transport is now expanded.
3639 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3640 silently ignored. Now an error message is written to the main and panic
3643 46. There's a new ACL modifier called "logwrite" which writes to a log file
3644 as soon as it is encountered.
3646 47. Added $local_user_uid and $local_user_gid at routing time.
3648 48. Exim crashed when trying to verify a sender address that was being
3651 49. Exim was recognizing only a space character after ".include". It now also
3652 recognizes a tab character.
3654 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3655 extracting the relevant information from the specification. The man page no
3656 longer contains scrambled data for the -d option, and I've added a section
3657 at the front about calling Exim under different names.
3659 51. Added "extra_headers" argument to the "mail" command in filter files.
3661 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3664 53. Installed eximstats 1.29.
3666 54. Added transport_filter_timeout as a generic transport option.
3668 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3669 Cc: header lines. This was required by RFC 822, but it not required by RFC
3672 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3673 incoming messages that did not have them. Now it does so only if the
3674 message originates locally, that is, if there is no associated remote host
3675 address. When Resent- header lines are present, this applies to the Resent-
3676 lines rather than the non-Resent- lines.
3678 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3679 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3681 58. Messages for configuration errors now include the name of the main
3682 configuration file - useful now that there may be more than one file in a
3683 list (.included file names were always shown).
3685 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3686 for those rare installations that do not start the daemon as root or run it
3687 setuid root. I've cut out the call to initgroups() if the daemon is not
3690 60. The Exim user and group can now be bound into the binary as text strings
3691 that are looked up at the start of Exim's processing.
3693 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3695 62. Added $mailstore_basename variable.
3697 63. Installed patch to sieve.c from Michael Haardt.
3699 64. When Exim failed to open the panic log after failing to open the main log,
3700 the original message it was trying to log was written to stderr and debug
3701 output, but if they were not available (the usual case in production), it
3702 was lost. Now it is written to syslog before the two lines that record the
3703 failures to open the logs.
3705 65. Users' Exim filters run in subprocesses under the user's uid. It is
3706 possible for a "deliver" command or an alias in a "personal" command to
3707 provoke an address rewrite. If logging of address rewriting is configured,
3708 this fails because the process is not running as root or exim. There may be
3709 a better way of dealing with this, but for the moment (because 4.30 needs
3710 to be released), I have disabled address rewrite logging when running a
3711 filter in a non-root, non-exim process.
3717 1. The buildconfig auxiliary program wasn't quoting the value set for
3718 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3719 not defined. This bug was masked in 4.22 by the effect that was fixed in
3722 2. Some messages that were rejected after a message id was allocated were
3723 shown as "incomplete" by exigrep. It no longer does this for messages that
3724 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3726 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3727 have allow_domain_literals set, the ID did not get logged in the <= line.
3728 Domain literals are now always recognized in Message-ID: header lines.
3730 4. The first argument for a ${extract expansion item is the key name or field
3731 number. Leading and trailing spaces in this item were not being ignored,
3732 causing some misleading effects.
3734 5. When deliver_drop_privilege was set, single queue runner processes started
3735 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3736 same command in the process it spins off) were not dropping privilege.
3738 6. When the daemon running as "exim" started a queue runner, it always
3739 re-executed Exim in the spun-off process. This is a waste of effort when
3740 deliver_drop_privilege is set. The new process now just calls the
3741 queue-runner function directly.
3747 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3750 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3751 ignored. Though the use of -oP was forcing the writing of a pid file, it
3752 was always written to the default place.
3754 3. If the message "no IP address found for host xxxx" is generated during
3755 incoming verification, it is now followed by identification of the incoming
3756 connection (so you can more easily find what provoked it).
3758 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3760 5. Added some features to "harden" Exim a bit more against certain attacks:
3762 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3763 be put in Local/Makefile. This is like the never_users runtime option,
3764 but it cannot be overridden. The default setting is "root".
3766 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3767 prefix string with which any file named in a -C command line option
3770 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3771 is retained for -C and -D only if the caller of Exim is root. Without
3772 it, the exim user may also use -C and -D and retain privilege.
3774 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3775 command line option is disabled.
3777 6. Macro names set by the -D option must start with an upper case letter, just
3778 like macro names defined in the configuration file.
3780 7. Added "dereference=" facility to LDAP.
3782 8. Two instances of the typo "uknown" in the source files are fixed.
3784 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3785 the Configure-Makefile script screwed up while processing it.
3787 10. Incorporated PCRE 4.4.
3789 11. The SMTP synchronization check was not operating right at the start of an
3790 SMTP session. For example, it could not catch a HELO sent before the client
3791 waited for the greeting. There is now a check for outstanding input at the
3792 point when the greeting is written. Because of the duplex, asynchronous
3793 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3794 way, but not yet received, when the check is performed.
3796 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3797 on TCP/IP sockets, because this apparently causes some broken clients to
3800 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3801 unchanged) from the Cygwin maintainer.
3803 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3804 was supported instead of testing for mbx. Effectively a typo.
3806 15. The spa authenticator server code was not checking that the input it
3807 received was valid base64.
3809 16. The debug output line for the "set" modifier in ACLs was not showing the
3810 name of the variable that was being set.
3812 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3814 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3815 lookup on its own. Something else was needed to trigger the lookup. For
3816 example, a match in host_lookup or the need for a host name in a host list.
3817 Now, if $sender_host_name is referenced and the host name has not yet been
3818 looked up, a lookup is performed. If the lookup fails, the variable remains
3819 empty, and $host_lookup_failed is set to "1".
3821 19. Added "eqi" as a case-independent comparison operator.
3823 20. The saslauthd authentication condition could segfault if neither service
3824 nor realm was specified.
3826 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3827 error message that was logged was misleading, and incoming SMTP
3828 connections were dropped. The message is now more accurate, and temporary
3829 errors are given to SMTP connections.
3831 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3832 (except RSET) with a 421 error, until QUIT is received. However, it was
3833 failing to send a response to QUIT.
3835 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3836 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3837 ACL is now run after the helo_try_verify_hosts code.
3839 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3840 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3841 case-independent, so other case variants are also recognized). Apparently
3842 some systems use these upper case variants.
3844 25. If more than two messages were waiting for the same host, and a transport
3845 filter was specified for the transport, Exim sent two messages over the
3846 same TCP/IP connection, and then failed with "socket operation on non-
3847 socket" when it tried to send the third.
3849 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3851 27. The extern definition of crypt16() in expand.c was not being excluded when
3852 the OS had its own crypt16() function.
3854 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3855 as a preferred synonym for return_size_limit, both as an option and as an
3858 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3860 30. Changed the default configuration ACL to relax the local part checking rule
3861 for addresses that are not in any local domains. For these addresses,
3862 slashes and pipe symbols are allowed within local parts, but the sequence
3863 /../ is explicitly forbidden.
3865 31. SPA server authentication was not clearing the challenge buffer before
3868 32. log_message in a "warn" ACL statement was writing to the reject log as
3869 well as to the main log, which contradicts the documentation and doesn't
3870 seem right (because no rejection is happening). So I have stopped it.
3872 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3873 However, I am unable to do any testing of this.
3875 34. Fixed an infelicity in the appendfile transport. When checking directories
3876 for a mailbox, to see if any needed to be created, it was accidentally
3877 using path names with one or more superfluous leading slashes; tracing
3878 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3880 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3881 contents are added to the log line that is written for every discarded
3882 recipient. (Previously a log_message setting was ignored.)
3884 36. The ${quote: operator now quotes the string if it is empty.
3886 37. The install script runs exim in order to find its version number. If for
3887 some reason other than non-existence or emptiness, which it checks, it
3888 could not run './exim', it was installing it with an empty version number,
3889 i.e. as "exim-". This error state is now caught, and the installation is
3892 38. An argument was missing from the function that creates an error message
3893 when Exim fails to connect to the socket for saslauthd authentication.
3894 This could cause Exim to crash, or give a corrupted message.
3896 39. Added isip, isip4, and isip6 to ${if conditions.
3898 40. The ACL variables $acl_xx are now saved with the message, and can be
3899 accessed later in routers, transports, and filters.
3901 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3902 strings in the file are not string-expanded.
3904 42. If a MAIL command specified a SIZE value that was too large to fit into an
3905 int variable, the check against message_size_limit failed. Such values are
3906 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3907 day this will have to be increased, but I don't think I want to be around
3908 when emails are that large.
3915 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3916 iconv() is not standard in FreeBSD.
3918 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3919 IPv6 enabled. The observed symptom was a segmentation fault on return from
3920 the function os_common_find_running_interfaces() in src/os.c.
3922 3. In the check_special_case() function in daemon.c I had used "errno" as an
3923 argument name, which causes warnings on some systems. This was basically a
3924 typo, since it was named "eno" in the comments!
3926 4. The code that waits for the clock to tick (at a resolution of some fraction
3927 of a second) so as to ensure message-id uniqueness was always waiting for
3928 at least one whole tick, when it could have waited for less. [This is
3929 almost certainly not relevant at current processor speeds, where it is
3930 unlikely to ever wait at all. But we try to future-proof.]
3932 5. The function that sleeps for a time interval that includes fractions of a
3933 second contained a race. It did not block SIGALRM between setting the
3934 timer, and suspending (a couple of lines later). If the interval was short
3935 and the sigsuspend() was delayed until after it had expired, the suspension
3936 never ended. On busy systems this could lead to processes getting stuck for
3939 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3940 process, before it forks any delivery processes. The open lookup caching
3941 mechanism meant that the open file or database connection was passed into
3942 the delivery process. The problem was that delivery processes always tidy
3943 up cached lookup data. This could cause a problem for the next delivery
3944 process started by the queue runner, because the external queue runner
3945 process does not know about the closure. So the next delivery process
3946 still has data in the lookup cache. In the case of a file lookup, there was
3947 no problem because closing a file descriptor in a subprocess doesn't affect
3948 the parent. However, if the lookup was caching a connection to a database,
3949 the connection was closed, and the second delivery process was likely to
3950 see errors such as "PGSQL: query failed: server closed the connection
3951 unexpectedly". The problem has been fixed by closing all cached lookups
3952 in a queue runner before running a delivery process.
3954 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3955 seem to have the "const" qualifier which it has on other OS. I've
3958 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3959 *of the same type* (client or server) with the same public name that an
3960 error should be diagnosed.
3962 9. When Exim looked up a host name for an IP address, but failed to find the
3963 original IP address when looking up the host name (a safety check), it
3964 output the message "<ip address> does not match any IP for NULL", which was
3965 confusing, to say the least. The bug was that the host name should have
3966 appeared instead of "NULL".
3968 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3969 user that is built into the binary, and the -C or -D options is used, root
3970 privilege is dropped before the configuration file is read. In addition,
3971 logging is switched to stderr instead of the normal log files. If the
3972 configuration then re-defines the Exim user, the unprivileged environment
3973 is probably not what is expected, so Exim logs a panic warning message (but
3976 However, if deliver_drop_privilege is set, the unprivileged state may well
3977 be exactly what is intended, so the warning has been cut out in that case,
3978 and Exim is allowed to try to write to its normal log files.
3984 1. smtp_return_error_details was not giving details for temporary sender
3985 or receiver verification errors.
3987 2. Diagnose a configuration error if two authenticators have the same public
3990 3. Exim used not to create the message log file for a message until the first
3991 delivery attempt. This could be confusing when incoming messages were held
3992 for policy or load reasons. The message log file is now created at the time
3993 the message is received, and an initial "Received" line is written to it.
3995 4. The automatically generated man page for command line options had a minor
3996 bug that caused no ill effects; however, a more serious problem was that
3997 the procedure for building the man page automatically didn't always
3998 operate. Consequently, release 4.20 contains an out-of-date version. This
3999 shouldn't happen again.
4001 5. When building Exim with embedded Perl support, the script that builds the
4002 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4003 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4005 6. The freeze_tell option was not being used for messages that were frozen on
4006 arrival, either by an ACL or by local_scan().
4008 7. Added the smtp_incomplete_transaction log selector.
4010 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4011 was accepting AUTH without a new EHLO.
4013 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4014 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4017 10. Logging of TCP/IP connections (when configured) now happens in the main
4018 daemon process instead of the child process, so that the TCP/IP connection
4019 count is more accurate (but it can never be perfect).
4021 11. The use of "drop" in a nested ACL was not being handled correctly in the
4022 outer ACL. Now, if condition failure induced by the nested "drop" causes
4023 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4024 or "require"), the connection is dropped.
4026 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4027 that yield "discard" can now be used with an "accept" or a "discard" verb,
4028 but an error is generated for any others (because I can't see a useful way
4029 to define what should happen).
4031 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4032 are now processed in the same way as lines in the Exim configuration file.
4033 In particular, continuation lines are supported.
4035 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4037 15. Added -ti meaning -t -i.
4039 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4040 domains, and warn by logging if others are found.
4042 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4043 returned from GIFCONF when Exim is trying to find the list of interfaces on
4044 a host. The code in os.c has been modified to copy each ifreq to an aligned
4045 structure in all cases.
4047 Also, in some cases, the returned ifreq's were being copied to a 'struct
4048 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4049 means the last couple of bytes of an IPv6 address could be chopped if the
4050 ifreq contained only a normal sockaddr (14 bytes storage).
4052 18. Named domain lists were not supported in the hosts_treat_as_local option.
4053 An entry such as +xxxx was not recognized, and was treated as a literal
4056 19. Ensure that header lines added by a DATA ACL are included in the reject log
4057 if the ACL subsequently rejects the message.
4059 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4060 MD5 (which is deprecated).
4062 21. When testing a filter file using -bf, Exim was writing a message when it
4063 took the sender from a "From " line in the message, but it was not doing so
4064 when it took $return_path from a Return-Path: header line. It now does.
4066 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4067 with a valid header line field name (a series of printing characters
4068 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4070 23. Changed "disc" in the source to "disk" to conform to the documentation and
4071 the book and for uniformity.
4073 24. Ignore Sendmail's -Ooption=value command line item.
4075 25. When execve() failed while trying to run a command in a pipe transport,
4076 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4077 could be confused with a return value of 69 from the command itself. This
4078 has been changed to 127, the value the shell returns if it is asked to run
4079 a non-existent command. The wording for the related log line suggests a
4080 non-existent command as the problem.
4082 26. If received_header_text expands to an empty string, do not add a Received:
4083 header line to the message. (Well, it adds a token one on the spool, but
4084 marks it "old" so that it doesn't get used or transmitted.)
4086 27. Installed eximstats 1.28 (addition of -nt option).
4088 28. There was no check for failure on the call to getsockname() in the daemon
4089 code. This can fail if there is a shortage of resources on the system, with
4090 ENOMEM, for example. A temporary error is now given on failure.
4092 29. Contrary to the C standard, it seems that in some environments, the
4093 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4094 program. Exim now does this explicitly; it affects the formatting of
4095 timestamps using strftime().
4097 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4098 complaints. I've now initialized all the variables, to avoid this.
4100 32. Header lines added by a system filter were not being "seen" during
4101 transport-time rewrites.
4103 33. The info_callback() function passed to OpenSSL is set up with type void
4104 (*)(SSL *, int, int), as described somewhere. However, when calling the
4105 function (actually a macro) that sets it up, the type void(*)() is
4106 expected. I've put in a cast to prevent warnings from picky compilers.
4108 34. If a DNS black list lookup found a CNAME record, but there were no A
4109 records associated with the domain it pointed at, Exim crashed.
4111 35. If a DNS black list lookup returned more than one A record, Exim ignored
4112 all but the first. It now scans all returned addresses if a particular IP
4113 value is being sought. In this situation, the contents of the
4114 $dnslist_value variable are a list of all the addresses, separated by a
4117 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4118 to accept a host name and all its aliases if the forward lookup for any of
4119 them yielded the IP address of the incoming connection. Now it accepts only
4120 those names whose forward lookup yields the correct IP address. Any other
4121 names are discarded. This closes a loophole whereby a rogue DNS
4122 administrator could create reverse DNS records to break through a
4123 wildcarded host restriction in an ACL.
4125 37. If a user filter or a system filter that ran in a subprocess used any of
4126 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4127 the wrong values were passed to the pipe command ($thisaddress had the
4128 value of $0, $0 had the value of $1, etc). This bug was introduced by
4129 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4131 38. Improved the line breaking for long SMTP error messages from ACLs.
4132 Previously, if there was no break point between 40 and 75 characters, Exim
4133 left the rest of the message alone. Two changes have been made: (a) I've
4134 reduced the minimum length to 35 characters; (b) if it can't find a break
4135 point between 35 and 75 characters, it looks ahead and uses the first one
4136 that it finds. This may give the occasional overlong line, but at least the
4137 remaining text gets split now.
4139 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4140 file descriptors might be low, and that setting 1000 would always raise it.
4141 It turns out that in some environments, the limit is already over 1000 and
4142 that lowering it causes trouble. So now Exim takes care not to decrease it.
4144 40. When delivering a message, the value of $return_path is set to $sender_
4145 address at the start of routing (routers may change the value). By an
4146 oversight, this default was not being set up when an address was tested by
4147 -bt or -bv, which affected the outcome if any router or filter referred to
4150 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4151 log only when "message" or "log_message" are set. However, if one of the
4152 conditions was an address verification, or a call to a nested ACL, the
4153 messages generated by the underlying test were being passed through. This
4154 no longer happens. The underlying message is available in $acl_verify_
4155 message for both "message" and "log_message" expansions, so it can be
4156 passed through if needed.
4158 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4159 new expansion $bh_ to give the encoded byte string without charset
4160 translation. Translation happens only if iconv() is available; HAVE_ICONV
4161 indicates this at build time. HEADERS_CHARSET gives the charset to
4162 translate to; headers_charset can change it in the configuration, and
4163 "headers charset" can change it in an individual filter file.
4165 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4166 that creates RFC 2047 encoded "words" labels them as that charset instead
4167 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4168 expansion operator; (ii) when Exim creates a From: line for a local
4169 message; (iii) when a header line is rewritten to include a "phrase" part.
4171 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4172 buggy, causing it to skip the first lines of messages whose message ID
4173 ended in 'D'. This would not have bitten before Exim release 4.14, because
4174 message IDs were unlikely to end in 'D' before then. The effect was to have
4175 incorrect size information for certain domains.
4177 45. #include "config.h" was missing at the start of the crypt16.c module. This
4178 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4181 46. If there was a timeout during a "random" callout check, Exim treated it as
4182 a failure of the random address, and carried on sending RSET and the real
4183 address. If the delay was just some slowness somewhere, the response to the
4184 original RCPT would be taken as a response to RSET and so on, causing
4185 mayhem of various kinds.
4187 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4188 when I implemented it. It didn't allow for the fact that some option values
4189 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4190 the right test for positive values.
4192 48. Domain names in DNS records are case-independent. Exim always looks them up
4193 in lower case. Some resolvers return domain names in exactly the case they
4194 appear in the zone file, that is, they may contain uppercase letters. Not
4195 all resolvers do this - some return always lower case. Exim was treating a
4196 change of case by a resolver as a change of domain, similar to a widening
4197 of a domain abbreviation. This triggered its re-routing code and so it was
4198 trying to route what was effectively the same domain again. This normally
4199 caused routing to fail (because the router wouldn't handle the domain
4200 twice). Now Exim checks for this case specially, and just changes the
4201 casing of the domain that it ultimately uses when it transmits the message
4204 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4207 50. If a filter generated a file delivery with a non-absolute name (possible if
4208 no home directory exists for the router), the forbid_file option was not
4211 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4212 the existing equality matching.
4214 52. Exim was using ints instead of ino_t variables in some places where it was
4215 dealing with inode numbers.
4217 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4218 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4219 called TMPDIR, and if it finds it is different, it changes its value.
4221 54. The smtp_printf() function is now made available to local_scan() so
4222 additional output lines can be written before returning. There is also an
4223 smtp_fflush() function to enable the detection of a dropped connection.
4224 The variables smtp_input and smtp_batched_input are exported to
4227 55. Changed the default runtime configuration: the message "Unknown user"
4228 has been removed from the ACL, and instead placed on the localuser router,
4229 using the cannot_route_message feature. This means that any verification
4230 failures that generate their own messages won't get overridden. Similarly,
4231 the "Unrouteable address" message that was in the ACL for unverifiable
4232 relay addresses has also been removed.
4234 56. Added hosts_avoid_esmtp to the smtp transport.
4236 57. The exicyclog script was not checking for the esoteric option
4237 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4238 will work only if exicyclog is run under the appropriate euid.
4240 58. Following a discussion on the list, the rules by which Exim recognises line
4241 endings on incoming messages have been changed. The -dropcr and drop_cr
4242 options are now no-ops, retained only for backwards compatibility. The
4243 following line terminators are recognized: LF CRLF CR. However, special
4244 processing applies to CR:
4246 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4247 nor a local message in the state where . is a terminator.
4249 (ii) If a bare CR is encountered in a header line, an extra space is added
4250 after the line terminator so as not to end the header. The reasoning
4251 behind this is that bare CRs in header lines are most likely either
4252 to be mistakes, or people trying to play silly games.
4254 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4255 was being incorrectly given as 18 bytes larger than it should have been.
4256 This is a VOB (very old bug).
4258 60. This may never have affected anything current, but just in case it has:
4259 When the local host is found other than at the start of a list of hosts,
4260 the local host, those with the same MX, and any that follow, are discarded.
4261 When the list in question was part of a longer list of hosts, the following
4262 hosts (not currently being processed) were also being discarded. This no
4263 longer happens. I'm not sure if this situation could ever has previously
4266 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4269 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4270 header. This is something that is recommended in a new Internet Draft, and
4271 is something that is documented as being done by Sendmail. There are two
4272 possible values. For messages generated by the autoreply transport, Exim
4275 Auto-Submitted: auto-replied
4277 whereas for all other generated messages (e.g. bounces) it adds
4279 Auto-Submitted: auto-generated
4281 63. The "personal" condition in filters now includes a test for the
4282 Auto-Submitted: header. If it contains the string "auto-" the message it
4283 not considered personal.
4285 64. Added rcpt_include_affixes as a generic transport option.
4287 65. Added queue_only_override (default true).
4289 66. Added the syslog_duplication option.
4291 67. If what should have been the first header line of a message consisted of
4292 a space followed by a colon, Exim was mis-interpreting it as a header line.
4293 It isn't of course - it is syntactically invalid and should therefore be
4294 treated as the start of the message body. The misbehaviour could have
4295 caused a number of strange effects, including loss of data in subsequent
4296 header lines, and spool format errors.
4298 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4299 client host had authenticated. This control can now be exercised by an ACL
4300 for more flexibility.
4302 69. By default, callouts do not happen when testing with -bh. There is now a
4303 variant, -bhc, which does actually run the callout code, including
4304 consulting and updating the callout cache.
4306 70. Added support for saslauthd authentication, courtesy of Alexander
4309 71. If statvfs() failed on the spool or log directories while checking their
4310 size for availability, Exim confusingly gave the error "space shortage".
4311 Furthermore, in debugging mode it crashed with a floating point exception.
4312 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4313 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4314 serious problem, Exim now writes to the main and panic logs when this
4315 happens, with details of the failure. It then refuses to accept the
4316 incoming message, giving the message "spool directory problem" or "log
4317 directory problem" with a 421 code for SMTP messages.
4319 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4320 0, 1, and 2 exist, because some OS complain for execs without them (see
4321 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4322 descriptors. However, the code omitted to check that the open succeeded,
4323 causing mysterious errors if for some reason the permissions on /dev/null
4324 got screwed. Now Exim writes a message to the main and panic logs, and
4325 bombs out if it can't open /dev/null.
4327 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4328 interact so that it is all more flexible. It is supposed to remain
4329 backwards compatible. Also added extra_local_interfaces.
4331 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4332 to bomb out with an assertion failure - to the client this appears as a
4333 connection drop. This problem occurs in the part of the code that was taken
4334 from the Samba project. Fortunately, the assertion is in a very simple
4335 function, so I have fixed this by reproducing the function inline in the
4336 one place where it is called, and arranging for authentication to fail
4337 instead of killing the process with assert().
4339 75. The SPA client code was not working when the server requested OEM rather
4340 than Unicode encoding.
4342 76. Added code to make require_files with a specific uid setting more usable in
4343 the case where statting the file as root fails - usually a non-root-mounted
4344 NFS file system. When this happens and the failure is EACCES, Exim now
4345 forks a subprocess and does the per-uid checking as the relevant uid.
4347 77. Added process_log_path.
4349 78. If log_file_path was not explicitly set, a setting of check_log_space or
4350 check_log_inodes was ignored.
4352 79. If a space check for the spool or log partitions fails, the incident is now
4353 logged. Of course, in the latter case the data may get lost...
4355 80. Added the %p formatting code to string_format() so that it can be used to
4356 print addresses in debug_print(). Adjusted all the address printing in the
4357 debugging in store.c to use %p rather than %d.
4359 81. There was a concern that a line of code in smtp_in.c could overflow a
4360 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4361 initially expressed, the concern was not well-founded, because trailing
4362 spaces are removed early. However, if the trailing spaces were followed by
4363 a NULL, they did not get removed, so the overflow was possible. Two fixes
4366 (a) I re-wrote the offending code in a cleaner fashion.
4367 (b) If an incoming SMTP command contains a NULL character, it is rejected
4370 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4371 runs initgroups(), so that if the Exim user is in any additional groups,
4372 they will be used during message reception.
4378 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob