1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.454 2007/01/17 11:17:58 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
10 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
13 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
16 PH/02 In an ACL statement such as
18 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
20 if a client was not listed at all, or was listed with a value other than
21 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
22 the condition was not true (as it should be), so access was not denied.
23 The bug was that the ! inversion was incorrectly passed on to the second
24 item. This has been fixed.
26 PH/03 Added additional dnslists conditions == and =& which are different from
27 = and & when the dns lookup returns more than one IP address.
33 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
34 fixed by 4.65/MH/01 (is this a record?) are fixed:
36 (i) An empty string was always treated as zero by the numeric comparison
37 operators. This behaviour has been restored.
39 (ii) It is documented that the numeric comparison operators always treat
40 their arguments as decimal numbers. This was broken in that numbers
41 starting with 0 were being interpreted as octal.
43 While fixing these problems I realized that there was another issue that
44 hadn't been noticed. Values of message_size_limit (both the global option
45 and the transport option) were treated as octal if they started with 0.
46 The documentation was vague. These values are now always treated as
47 decimal, and I will make that clear in the documentation.
53 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
54 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
57 MH/01 Don't check that the operands of numeric comparison operators are
58 integers when their expansion is in "skipping" mode (fixes bug
59 introduced by 4.64-PH/07).
61 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
62 child addresses, Exim now panics and dies. Previously, because the count
63 is held in a short int, deliveries were likely to be lost. As such a
64 large number of recipients for a single message is ridiculous
65 (performance will be very, very poor), I have chosen to impose a limit
66 rather than extend the field.
72 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
73 leftover -K file (the existence of which was triggered by #402).
74 While we were at it, introduced process PID as part of the -K
75 filename. This should rule out race conditions when creating
78 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
79 processing considerably. Previous code took too long for large mails,
80 triggering a timeout which in turn triggers #401.
82 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
83 in the DK code in transports.c. sendfile() is not really portable,
84 hence the _LINUX specificness.
86 TF/01 In the add_headers option to the mail command in an Exim filter,
87 there was a bug that Exim would claim a syntax error in any
88 header after the first one which had an odd number of characters
91 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
92 callout verification, Exim cached a "reject" for the entire domain. This
93 is correct for most verifications, but it is not correct for a recipient
94 verification with use_sender or use_postmaster set, because in that case
95 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
96 case of MAIL FROM:<> rejection from other early rejections (e.g.
97 rejection of HELO). When verifying a recipient using a non-null MAIL
98 address, the cache is ignored if it shows MAIL FROM:<> rejection.
99 Whatever the result of the callout, the value of the domain cache is
100 left unchanged (for any other kind of callout, getting as far as trying
101 RCPT means that the domain itself is ok).
103 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
106 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
107 manifest itself as EPIPE rather than ECONNECT. When tidying away a
108 session, the daemon ignores ECONNECT errors and logs others; it now
109 ignores EPIPE as well.
111 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
112 (quoted-printable decoding).
114 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
115 later the small subsequent patch to fix an introduced bug.
117 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
119 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
121 PH/08 An error is now given if message_size_limit is specified negative.
123 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
124 to be given (somewhat) arbitrary names.
126 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
129 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
130 miscellaneous code fixes
132 PH/10 Added the log_reject_target ACL modifier to specify where to log
135 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
136 hostname. This is wrong, because it relates to the incoming message (and
137 probably the interface on which it is arriving) and not to the outgoing
138 callout (which could be using a different interface). This has been
139 changed to use the value of the helo_data option from the smtp transport
140 instead - this is what is used when a message is actually being sent. If
141 there is no remote transport (possible with a router that sets up host
142 addresses), $smtp_active_hostname is used.
144 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
145 tweaks were necessary in order to get it to work (see also 21 below):
146 (a) The code assumed that strncpy() returns a negative number on buffer
147 overflow, which isn't the case. Replaced with Exim's string_format()
149 (b) There were several signed/unsigned issues. I just did the minimum
150 hacking in of casts. There is scope for a larger refactoring.
151 (c) The code used strcasecmp() which is not a standard C function.
152 Replaced with Exim's strcmpic() function.
153 (d) The code set only $1; it now sets $auth1 as well.
154 (e) A simple test gave the error "authentication client didn't specify
155 service in request". It would seem that Dovecot has changed its
156 interface. Fortunately there's a specification; I followed it and
157 changed what the client sends and it appears to be working now.
159 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
162 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
163 address A is aliased to B and C, where B exists and C does not. Without
164 -v the output is "A verified" because verification stops after a
165 successful redirection if more than one address is generated. However,
166 with -v the child addresses are also verified. Exim was outputting "A
167 failed to verify" and then showing the successful verification for C,
168 with its parentage. It now outputs "B failed to verify", showing B's
169 parentage before showing the successful verification of C.
171 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
172 look up a TXT record in a specific list after matching in a combined
175 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
176 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
177 they consult the DNS. I had assumed they would set it the way they
178 wanted; and indeed my experiments on Linux seem to show that in some
179 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
180 To be on the safe side, however, I have now made the interface to
181 host_find_byname() similar to host_find_bydns(), with an argument
182 containing the DNS resolver options. The host_find_byname() function now
183 sets these options at its start, just as host_find_bydns() does. The smtp
184 transport options dns_qualify_single and dns_search_parents are passed to
185 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
186 of host_find_byname() use the default settings of RES_DEFNAMES
187 (qualify_single) but not RES_DNSRCH (search_parents).
189 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
190 spool_read_header() do less string testing, by means of a preliminary
191 switch on the second character of optional "-foo" lines. (This is
192 overdue, caused by the large number of possibilities that now exist.
193 Originally there were few.) While I was there, I also converted the
194 str(n)cmp tests so they don't re-test the leading "-" and the first
195 character, in the hope this might squeeze out yet more improvement.
197 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
198 flag allowing group syntax was set by the header_syntax check but not
199 turned off, possible causing trouble later; (2) The flag was not being
200 set at all for the header_verify test, causing "group"-style headers to
201 be rejected. I have now set it in this case, and also caused header_
202 verify to ignore an empty address taken from a group. While doing this, I
203 came across some other cases where the code for allowing group syntax
204 while scanning a header line wasn't quite right (mostly, not resetting
205 the flag correctly in the right place). These bugs could have caused
206 trouble for malformed header lines. I hope it is now all correct.
208 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
209 with the "reply" argument non-NULL. The code, however (which originally
210 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
211 but it didn't always do it. This confused somebody who was copying the
212 code for some other use. I have removed all the tests.
214 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
215 feature that was used to support insecure browsers during the U.S. crypto
216 embargo. It requires special client support, and Exim is probably the
217 only MTA that supported it -- and would never use it because real RSA is
218 always available. This code has been removed, because it had the bad
219 effect of slowing Exim down by computing (never used) parameters for the
220 RSA_EXPORT functionality.
222 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
223 authenticator to fail if there's a tab character in the incoming data
224 (there should never be unless someone is messing about, as it's supposed
225 to be base64-encoded). Also added, on Timo's advice, the "secured" option
226 if the connection is using TLS or if the remote IP is the same as the
227 local IP, and the "valid-client-cert option" if a client certificate has
230 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
231 authenticators. This can be used for authorization after authentication
232 succeeds. (In the case of plaintext, it servers for both authentication
235 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
236 if any retry times were supplied.
238 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
239 connection, where there is no client IP address to check. In this
240 situation, the verify now always succeeds.
242 PH/25 Applied John Jetmore's -Mset patch.
244 PH/26 Added -bem to be like -Mset, but loading a message from a file.
246 PH/27 In a string expansion for a processed (not raw) header when multiple
247 headers of the same name were present, leading whitespace was being
248 removed from all of them, but trailing whitespace was being removed only
249 from the last one. Now trailing whitespace is removed from each header
250 before concatenation. Completely empty headers in a concatenation (as
253 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
254 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
256 PH/29 [Removed. This was a change that I later backed out, and forgot to
257 correct the ChangeLog entry (that I had efficiently created) before
258 committing the later change.]
260 PH/30 Exim was sometimes attempting to deliver messages that had suffered
261 address errors (4xx response to RCPT) over the same connection as other
262 messages routed to the same hosts. Such deliveries are always "forced",
263 so retry times are not inspected. This resulted in far too many retries
264 for the affected addresses. The effect occurred only when there were more
265 hosts than the hosts_max_try setting in the smtp transport when it had
266 the 4xx errors. Those hosts that it had tried were not added to the list
267 of hosts for which the message was waiting, so if all were tried, there
268 was no problem. Two fixes have been applied:
270 (i) If there are any address or message errors in an SMTP delivery, none
271 of the hosts (tried or untried) are now added to the list of hosts
272 for which the message is waiting, so the message should not be a
273 candidate for sending over the same connection that was used for a
274 successful delivery of some other message. This seems entirely
275 reasonable: after all the message is NOT "waiting for some host".
276 This is so "obvious" that I'm not sure why it wasn't done
277 previously. Hope I haven't missed anything, but it can't do any
278 harm, as the worst effect is to miss an optimization.
280 (ii) If, despite (i), such a delivery is accidentally attempted, the
281 routing retry time is respected, so at least it doesn't keep
282 hammering the server.
284 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
285 in ${readsocket because some servers need this prod.
287 PH/32 Added some extra debug output when updating a wait-xxx database.
289 PH/33 The hint "could be header name not terminated by colon", which has been
290 given for certain expansion errors for a long time, was not being given
291 for the ${if def:h_colon_omitted{... case.
293 PH/34 The spec says: "With one important exception, whenever a domain list is
294 being scanned, $domain contains the subject domain." There was at least
295 one case where this was not true.
297 PH/35 The error "getsockname() failed: connection reset by peer" was being
298 written to the panic log as well as the main log, but it isn't really
299 panic-worthy as it just means the connection died rather early on. I have
300 removed the panic log writing for the ECONNRESET error when getsockname()
303 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
304 runs only) independently of the message's sender address. This meant
305 that, if the 4xx error was in fact related to the sender, a different
306 message to the same recipient with a different sender could confuse
307 things. In particualar, this can happen when sending to a greylisting
308 server, but other circumstances could also provoke similar problems.
309 I have changed the default so that the retry time for these errors is now
310 based a combination of the sender and recipient addresses. This change
311 can be overridden by setting address_retry_include_sender=false in the
314 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
315 remote server are returned as part of bounce messages. This was not
316 happening for LMTP over a pipe (the lmtp transport), but now it is the
317 same for both kinds of LMTP.
319 PH/38 Despite being documented as not happening, Exim was rewriting addresses
320 in header lines that were in fact CNAMEs. This is no longer the case.
322 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
323 and queue runs started by the daemon processed all messages. This has
324 been fixed so that -R and -S can now usefully be given with -q<time>.
326 PH/40 Import PCRE release 6.7 (fixes some bugs).
328 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
330 PH/42 Give an error if -q is specified more than once.
332 PH/43 Renamed the variables $interface_address and $interface_port as
333 $received_ip_address and $received_port, to make it clear that these
334 values apply to message reception, and not to the outgoing interface when
335 a message is delivered. (The old names remain recognized, of course.)
337 PH/44 There was no timeout on the connect() call when using a Unix domain
338 socket in the ${readsocket expansion. There now is.
340 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
341 be meaningful with "accept".
343 SC/01 Eximstats V1.43
344 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
346 SC/02 Eximstats V1.44
347 Use a glob alias rather than an array ref in the generated
348 parser. This improves both readability and performance.
350 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
351 Collect SpamAssassin and rejection statistics.
352 Don't display local sender or destination tables unless
353 there is data to show.
354 Added average volumes into the top table text output.
356 SC/04 Eximstats V1.46
357 Collect data on the number of addresses (recipients)
358 as well as the number of messages.
360 SC/05 Eximstats V1.47
361 Added 'Message too big' to the list of mail rejection
362 reasons (thanks to Marco Gaiarin).
364 SC/06 Eximstats V1.48
365 Mainlog lines which have GMT offsets and are too short to
366 have a flag are now skipped.
368 SC/07 Eximstats V1.49 (Alain Williams)
369 Added the -emptyok flag.
371 SC/08 Eximstats V1.50
372 Fixes for obtaining the IP address from reject messages.
374 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
375 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
376 whitesspace changes from 4.64-PH/27
378 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
381 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
382 are found, allow negative numbers in numeric criteria)
384 JJ/06 exipick.20061117.2, added new $message_body_missing variable
386 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
387 to match changes made in 4.64-PH/43
389 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
391 PH/47 Put in an explicit test for a DNS lookup of an address record where the
392 "domain" is actually an IP address, and force a failure. This locks out
393 those revolvers/nameservers that support "A-for-A" lookups, in
394 contravention of the specifications.
396 PH/48 When a host name was looked up from an IP address, and the subsequent
397 forward lookup of the name timed out, the host name was left in
398 $sender_host_name, contrary to the specification.
400 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
401 restricted to single-key lookups, Exim was not diagnosing an error if
402 * or *@ was used with a query-style lookup.
404 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
406 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
407 long ago, but noone interested enough thought of it. Let's just say that
408 the "1.1" means that there are some new functions that weren't there at
409 some point in the past.
411 PH/51 Error processing for expansion failure of helo_data from an smtp
412 transport during callout processing was broken.
414 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
415 tested/used via the -bh/-bhc/-bs options.
417 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
418 bug, fixed in subsequent PCRE releases).
420 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
421 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
423 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
429 SC/01 Use a glob alias rather than an array ref in eximstats generated
430 parser. This improves both readability and performance.
432 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
433 Don't display local sender or destination tables in eximstats unless
434 there is data to show.
435 Added average volumes into the eximstats top table text output.
437 SC/03 Collect data on the number of addresses (recipients) as well
438 as the number of messages in eximstats.
440 TF/01 Correct an error in the documentation for the redirect router. Exim
441 does (usually) call initgroups() when daemonizing.
443 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
444 with consistent privilege compared to when running as a daemon.
446 TF/03 Note in the spec that $authenticated_id is not set for local
447 submissions from trusted users.
449 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
450 Thanks to Dean Brooks <dean@iglou.com> for the patch.
452 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
453 by adding some example configuration directives to the default
454 configuration file. A little bit of work is required to uncomment the
455 directives and define how usernames and passwords are checked, but
456 there is now a framework to start from.
458 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
459 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
460 without this. I don't know how relevant this is to other LDAP libraries.
462 PH/02 Add the verb name to the "unknown ACL verb" error.
464 PH/03 Magnus Holmgren's patch for filter_prepend_home.
466 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
468 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
469 directory not expanded when it should be if an expanded home directory
470 was set for the address (which is overridden by the transport).
472 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
475 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
476 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
477 because it is too late at that time, and has no effect.
479 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
480 security issue with \' (bugzilla #107). I could not use the
481 PQescapeStringConn() function, because it needs a PGconn value as one of
484 PH/08 When testing addresses using -bt, indicate those final addresses that
485 are duplicates that would not cause an additional delivery. At least one
486 person was confused, thinking that -bt output corresponded to deliveries.
487 (Suppressing duplicates isn't a good idea as you lose the information
488 about possibly different redirections that led to the duplicates.)
490 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
491 systems where poll() doesn't work, in particular OS X.
493 PH/10 Added more information to debugging output for retry time not reached.
495 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
496 operations in malware.c.
498 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
501 PH/13 If write_rejectlog was set false when logging was sent to syslog with
502 syslog_duplication set false, log lines that would normally be written
503 both the the main log and to the reject log were not written to syslog at
506 PH/14 In the default configuration, change the use of "message" in ACL warn
507 statements to "add_header".
509 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
510 not followed by a command (e.g. "seen endif").
512 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
513 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
516 PH/17 Added extra conditions to the default value of delay_warning_condition
520 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
521 { match{$h_precedence:}{(?i)bulk|list|junk} } \
522 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
525 The Auto-Submitted: and various List- headers are standardised, whereas I
526 don't think Precedence: ever was.
528 PH/18 Refactored debugging code in route_finduser() to show more information,
529 in particular, the error code if getpwnam() issues one.
531 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
532 This is apparently needed in addition to the PH/07 change above to avoid
533 any possible encoding problems.
535 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
536 but not after initializing Perl.
538 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
539 output them only if debugging. By default they are written stderr,
540 apparently, which is not desirable.
542 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
545 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
548 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
550 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
551 authenticated or an ident call has been made. Suppress the default
552 values for $authenticated_id and $authenticated_sender (but permit -oMai
553 and -oMas) when testing with -bh.
555 PH/24 Re-jigged the order of the tests in the default configuration so that the
556 tests for valid domains and recipients precede the DNS black list and CSA
557 tests, on the grounds that those ones are more expensive.
559 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
560 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
561 This bug exists in every version of Exim that I still have, right back to
564 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
565 However, an attempt to turn on case-sensitivity in a regex key by
566 including (?-i) didn't work because the subject string was already
567 lowercased, and the effects were non-intuitive. It turns out that a
568 one-line patch can be used to allow (?-i) to work as expected.
574 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
575 other effects) broke the use of negated acl sub-conditions.
577 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
580 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
581 "Deny" causes Exim to reject the incoming connection with a 554 error.
582 Unfortunately, if there is a major crisis, such as a disk failure,
583 tcp-wrappers gives "deny", whereas what one would like would be some
584 kind of temporary error. A kludge has been added to help with this.
585 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
586 554 error is used if errno is still zero or contains ENOENT (which occurs
587 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
590 PH/03 Add -lutil to the default FreeBSD LIBS setting.
592 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
593 errors. Otherwise a message that provokes a temporary error (when other
594 messages do not) can cause a whole host to time out.
596 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
597 addresses were routed directly to files or pipes from a redirect router.
598 File deliveries just didn't batch; pipe deliveries might have suffered
601 PH/06 A failure to get a lock for a hints database would erroneously always say
602 "Failed to get write lock", even when it was really a read lock.
604 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
605 of 0600. This has been changed to use the value of the lockfile_mode
606 option (which defaults to 0600).
608 PH/08 Applied small patch from the Sieve maintainer.
610 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
611 folder from quota calculations, a direct delivery into this folder messed
612 up the contents of the maildirsize file. This was because the regex was
613 used only to exclude .Trash (or whatever) when the size of the mailbox
614 was calculated. There was no check that a delivery was happening into an
615 excluded directory. This bug has been fixed by ignoring all quota
616 processing for deliveries into excluded directories.
618 PH/10 Added the maildirfolder_create_regex option to appendfile.
624 PH/01 The code for finding all the local interface addresses on a FreeBSD
625 system running IPv6 was broken. This may well have applied to all BSD
626 systems, as well as to others that have similar system calls. The broken
627 code found IPv4 interfaces correctly, but gave incorrect values for the
628 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
629 that it would not match correctly against @[] and not recognize the IPv6
632 PH/02 The ipliteral router was not recognizing addresses of the form user@
633 [ipv6:....] because it didn't know about the "ipv6:" prefix.
635 PH/03 Added disable_ipv6.
637 PH/04 Changed $reply_address to use the raw form of the headers instead of the
638 decoded form, because it is most often used to construct To: headers
639 lines in autoreplies, and the decoded form may well be syntactically
640 invalid. However, $reply_address has leading white space removed, and all
641 newlines turned into spaces so that the autoreply transport does not
644 PH/05 If group was specified without a user on a router, and no group or user
645 was specified on a transport, the group from the router was ignored.
647 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
648 for visible compile-time settings that can be used to change these
649 numbers, for those that want even more. Backwards compatibility with old
650 spool files has been maintained. However, going back to a previous Exim
651 release will lost any variables that are in spool files.
653 PH/07 Two small changes when running in the test harness: increase delay when
654 passing a TCP/IP connection to a new process, in case the original
655 process has to generate a bounce, and remove special handling of
656 127.0.0.2 (sic), which is no longer necessary.
658 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
659 be the same on different OS.
661 PH/09 Moved a debug statement in filter processing to avoid a race problem when
664 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
665 whether --show-vars was specified or not
667 JJ/02 exipick: Added support for new ACL variable spool format introduced
670 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
671 syntactically invalid From: or Reply-to: line, and a filter used this to
672 generate an autoreply, and therefore failed to obtain an address for the
673 autoreply, Exim could try to deliver to a non-existent relative file
674 name, causing unrelated and misleading errors. What now happens is that
675 it logs this as a hard delivery error, but does not attempt to create a
678 PH/11 The exinext utility has a -C option for testing purposes, but although
679 the given file was scanned by exinext itself; it wasn't being passed on
680 when Exim was called.
682 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
683 an end-of-file indication when reading a command response.
685 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
686 compiled. In many other places in Exim, IPv6 addresses are always
687 recognized, so I have changed this. It also means that IPv4 domain
688 literals of the form [IPV4:n.n.n.n] are now always recognized.
690 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
691 used if the router is not running as root, for example, when verifying at
692 ACL time, or when using -bh. The debugging output from this situation was
693 non-existent - all you got was a failure to exec. I have made two
696 (a) Failures to set uid/gid, the current directory, or a process leader
697 in a subprocess such as that created by queryprogram now generate
698 suitable debugging ouput when -d is set.
700 (b) The queryprogram router detects when it is not running as root,
701 outputs suitable debugging information if -d is set, and then runs
702 the subprocess without attempting to change uid/gid.
704 PH/15 Minor change to Makefile for building test_host (undocumented testing
707 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
708 additional section of a DNS packet that returns MX or SRV records.
709 Instead, it always explicitly searches for A/AAAA records. This avoids
710 major problems that occur when a DNS server includes only records of one
711 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
712 fixed another bug: if SRV records were looked up and the corresponding
713 address records were *not* found in the additional section, the port
714 values from the SRV records were lost.
716 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
717 using the correct key (the original address) when searching the retry
718 rules in order to find which one to use for generating the retry hint.
720 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
721 adding the default one. Similarly, if it contains a Reply-To: header, the
722 errors_reply_to option, if set, is not used.
724 PH/19 When calculating a retry time, Exim used to measure the "time since
725 failure" by looking at the "first failed" field in the retry record. Now
726 it does not use this if it is later than than the arrival time of the
727 message. Instead it uses the arrival time. This makes for better
728 behaviour in cases where some deliveries succeed, thus re-setting the
729 "first failed" field. An example is a quota failure for a huge message
730 when small messages continue to be delivered. Without this change, the
731 "time since failure" will always be short, possible causing more frequent
732 delivery attempts for the huge message than are intended.
733 [Note: This change was subsequently modified - see PH/04 for 4.62.]
735 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
736 $1, $2, $3) because the numerical variables can be reset during some
737 expansion items (e.g. "match"), thereby losing the authentication data.
739 PH/21 Make -bV show the size of off_t variables so that the test suite can
740 decide whether to run tests for quotas > 2G.
742 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
743 mailbox_size, and mailbox_filecount in the appendfile transport. If a
744 filecount value is greater than 2G or if a quota value is greater than 2G
745 on a system where the size of off_t is not greater than 4, a panic error
748 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
749 never match. The debug and -bh output now contains an explicit error
750 message indicating a malformed IPv4 address or mask.
752 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
753 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
756 PH/25 Do not write to syslog when running in the test harness. The only
757 occasion when this arises is a failure to open the main or panic logs
758 (for which there is an explicit test).
760 PH/26 Added the /no_tell option to "control=freeze".
762 PH/27 If a host name lookup failed very early in a connection, for example, if
763 the IP address matched host_lookup and the reverse lookup yielded a name
764 that did not have a forward lookup, an error message of the form "no IP
765 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
766 could be logged. Now it outputs the IP address instead of "NULL".
768 PH/28 An enabling patch from MH: add new function child_open_exim2() which
769 allows the sender and the authenticated sender to be set when
770 submitting a message from within Exim. Since child_open_exim() is
771 documented for local_scan(), the new function should be too.
773 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
774 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
775 results in an empty string is now treated as unset.
777 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
779 PH/31 Added sender_verify_fail logging option.
781 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
782 needed by RFC 822 but not by RFC 2822 was commented out. I have now
783 tidied the source and removed it altogether.
785 PH/33 When a queue run was abandoned because the load average was too high, a
786 log line was always written; now it is written only if the queue_run log
787 selector is set. In addition, the log line for abandonment now contains
788 information about the queue run such as the pid. This is always present
789 in "start" and "stop" lines but was omitted from the "abandon" line.
791 PH/34 Omit spaces between a header name and the colon in the error message that
792 is given when verify = headers_syntax fails (if there are lots of them,
793 the message gets confusing).
795 PH/35 Change the default for dns_check_names_pattern to allow slashes within
796 names, as there are now some PTR records that contain slashes. This check
797 is only to protect against broken name servers that fall over on strange
798 characters, so the fact that it applies to all lookups doesn't matter.
800 PH/36 Now that the new test suite is complete, we can remove some of the
801 special code in Exim that was needed for the old test suite. For example,
802 sorting DNS records because real resolvers return them in an arbitrary
803 order. The new test suite's fake resolver always returns records in the
806 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
807 bounces) except when queue_only is set, to avoid logging races between
808 the different processes.
810 PH/38 Panic-die if .include specifies a non-absolute path.
812 PH/39 A tweak to the "H" retry rule from its user.
814 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
815 a label. They prevented compilation on older perls.
817 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
818 a warning to be raised on newish perls.
820 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
821 on queue. Changes to match documented behaviour of showing count of
822 messages matching specified criteria.
824 PH/40 Changed the default ident timeout from 30s to 5s.
826 PH/41 Added support for the use of login_cap features, on those BSD systems
827 that have them, for controlling the resources used by pipe deliveries.
829 PH/42 The content-scanning code uses fopen() to create files in which to put
830 message data. Previously it was not paying any attention to the mode of
831 the files. Exim runs with umask(0) because the rest of the code creates
832 files with open(), and sets the required mode explicitly. Thus, these
833 files were ending up world-writeable. This was not a big issue, because,
834 being within the spool directory, they were not world-accessible. I have
835 created a function called modefopen, which takes an additional mode
836 argument. It sets umask(777), creates the file, chmods it to the required
837 mode, then resets the umask. All the relevant calls to fopen() in the
838 content scanning code have been changed to use this function.
840 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
841 to 24 hours. This avoids potential overflow problems when processing G
842 and H retry rules. I suspect nobody ever tinkers with this value.
844 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
846 PH/45 When the plaintext authenticator is running as a client, the server's
847 challenges are checked to ensure they are valid base64 strings. By
848 default, the authentication attempt is cancelled if an invalid string is
849 received. Setting client_ignore_invalid_base64 true ignores these errors.
850 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
851 they are received. Thus, the responses can be made to depend on the
852 challenges. If an invalid string is ignored, an empty string is placed in
855 PH/46 Messages that are created by the autoreply transport now contains a
856 References: header, in accordance with RFCs 2822 and 3834.
858 PH/47 Added authenticated_sender_force to the smtp transport.
860 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
862 PH/49 Installed latest patch from the Sieve maintainer.
864 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
865 was also set, the appendfile transport was unnecessarily scanning a
866 directory of message files (e.g. for maildir delivery) to find the count
867 of files (along with the size), even though it did not need this
868 information. It now does the scan only if it needs to find either the
869 size of the count of files.
871 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
873 PH/52 Two bugs concerned with error handling when the smtp transport is
876 (i) Exim was not creating retry information for temporary errors given
877 for individual recipients after the DATA command when the smtp transport
878 was used in LMTP mode. This meant that they could be retried too
879 frequently, and not timed out correctly.
881 (ii) Exim was setting the flag that allows error details to be returned
882 for LMTP errors on RCPT commands, but not for LMTP errors for individual
883 recipients that were returned after the DATA command.
885 PH/53 This is related to PH/52, but is more general: for any failing address,
886 when detailed error information was permitted to be returned to the
887 sender, but the error was temporary, then after the final timeout, only
888 "retry timeout exceeded" was returned. Now it returns the full error as
889 well as "retry timeout exceeded".
891 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
892 do this, and (what is worse) MTAs that accept it.
894 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
895 will now be deprecated.
897 PH/56 New os.c-cygwin from the Cygwin maintainer.
899 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
900 formats (previously only available in exim formats via -bpr, -bpru,
901 and -bpra. Now also available in native and exiqgrep formats)
903 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
904 with very large, slow to parse queues
906 JJ/08 exipick: added ! as generic prefix to negate any criteria format
908 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
910 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
911 responses to authentication challenges, though it was showing the
912 challenges; (ii) I've removed the CR characters from the debug output for
915 PH/58 Allow for the insertion of a newline as well as a space when a string
916 is turned into more than one encoded-word during RFC 2047 encoding. The
917 Sieve code now uses this.
919 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
920 data_4xx, lost_connection, tls_required.
922 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
923 message was being sent as an SMTP response.
925 PH/61 Add -l and -k options to exicyclog.
927 PH/62 When verifying, if an address was redirected to one new address, so that
928 verification continued, and the new address failed or deferred after
929 having set something in $address_data, the value of $address_data was not
930 passed back to the ACL. This was different to the case when no
931 redirection occurred. The value is now passed back in both cases.
933 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
934 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
935 use login_cap.h, so on its own it isn't the distinguishing feature. The
936 new name refers directly to the setclassresources() function.
938 PH/65 Added configuration files for NetBSD3.
940 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
942 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
943 is preferred over IPv4.
945 PH/68 The bounce_return_message and bounce_return_body options were not being
946 honoured for bounces generated during the reception of non-SMTP messages.
947 In particular, this applied to messages rejected by the ACL. This bug has
948 been fixed. However, if bounce_return_message is true and bounce_return_
949 body is false, the headers that are returned for a non-SMTP message
950 include only those that have been read before the error was detected.
951 (In the case of an ACL rejection, they have all been read.)
953 PH/69 The HTML version of the specification is now built in a directory called
954 spec_html instead of spec.html, because the latter looks like a path with
955 a MIME-type, and this confuses some software.
957 PH/70 Catch two compiler warnings in sieve.c.
959 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
960 function verify_get_ident() calls ip_connect() to connect a socket, but
961 if the "connect()" function timed out, ip_connect() used to close the
962 socket. However, verify_get_ident() also closes the socket later, and in
963 between Exim writes to the log, which may get opened at this point. When
964 the socket was closed in ip_connect(), the log could get the same file
965 descriptor number as the socket. This naturally causes chaos. The fix is
966 not to close the socket in ip_connect(); the socket should be closed by
967 the function that creates it. There was only one place in the code where
968 this was missing, in the iplookup router, which I don't think anybody now
969 uses, but I've fixed it anyway.
971 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
972 well as to direct DNS lookups. Otherwise the handling of names in host
973 lists is inconsistent and therefore confusing.
979 PH/01 Two changes to the default runtime configuration:
981 (1) Move the checks for relay_from_hosts and authenticated clients from
982 after to before the (commented out) DNS black list checks.
984 (2) Add control=submission to the relay_from_hosts and authenticated
985 clients checks, on the grounds that messages accepted by these
986 statements are most likely to be submissions.
988 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
990 (1) Generate an error if the third argument for the ${prvs expansion is
993 (2) Treat a missing third argument of ${prvscheck as if it were an empty
996 (3) Reset the variables that are obtained from the first argument of
997 ${prvscheck and used in the second argument before leaving the code,
998 because their memory is reclaimed, so using them afterwards may do
1001 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1002 one (it's much easier than Tom thought :-).
1004 (5) Because of (4), we can now allow for the use of $prvscheck_result
1005 inside the third argument.
1007 PH/03 For some reason, the default setting of PATH when running a command from
1008 a pipe transport was just "/usr/bin". I have changed it to
1011 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1012 anything to be listed in the output from -bV.
1014 PH/05 When a filter generated an autoreply, the entire To: header line was
1015 quoted in the delivery log line, like this:
1017 => >A.N.Other <ano@some.domain> <original@ddress> ...
1019 This has been changed so that it extracts the operative address. There
1020 may be more than one such address. If so, they are comma-separated, like
1023 => >ano@some.domain,ona@other.domain <original@ddress> ...
1025 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1026 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1027 not being looked up in the rDNS to get a host name, Exim was showing the
1028 IP address twice in Received: lines, even though the IP addresses were
1029 identical. For example:
1031 Received: from [1.2.3.4] (helo=[1.2.3.4])
1033 However, if the real host name was known, it was omitting the HELO data
1034 if it matched the actual IP address. This has been tidied up so that it
1035 doesn't show the same IP address twice.
1037 PH/07 When both +timestamp and +memory debugging was on, the value given by
1038 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1039 called by the debug printing, thereby overwriting the timestamp buffer.
1040 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1042 PH/08 When the original message was included in an autoreply transport, it
1043 always said "this is a copy of the message, including all the headers",
1044 even if body_only or headers_only was set. It now gives an appropriate
1047 PH/09 Applied a patch from the Sieve maintainer which:
1049 o fixes some comments
1050 o adds the (disabled) notify extension core
1051 o adds some debug output for the result of if/elsif tests
1052 o points to the current vacation draft in the documentation
1053 and documents the missing references header update
1057 o fixes a bug in processing the envelope test (when testing
1058 multiple envelope elements, the last element determinted the
1061 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1062 Electronic Mail") by including:
1064 Auto-submitted: auto-generated
1066 in the messages that it generates (bounce messages and others, such as
1067 warnings). In the case of bounce messages for non-SMTP mesages, there was
1068 also a typo: it was using "Auto_submitted" (underscore instead of
1069 hyphen). Since every message generated by Exim is necessarily in response
1070 to another message, thes have all been changed to:
1072 Auto-Submitted: auto-replied
1074 in accordance with these statements in the RFC:
1076 The auto-replied keyword:
1078 - SHOULD be used on messages sent in direct response to another
1079 message by an automatic process,
1081 - MUST NOT be used on manually-generated messages,
1083 - MAY be used on Delivery Status Notifications (DSNs) and Message
1084 Disposition Notifications (MDNs),
1086 - MUST NOT be used on messages generated by automatic or periodic
1087 processes, except for messages which are automatic responses to
1090 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1091 to the default Received: header definition.
1093 PH/12 Added log selector acl_warn_skipped (default on).
1095 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1096 variables because (a) they are in the wrong storage pool and (b) even if
1097 they were copied, it wouldn't work properly because of the caching.
1099 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1100 checking when decoding. Apparently there are clients that generate
1101 overlong encoded strings. Why am I not surprised?
1103 PH/15 If the first argument of "${if match_address" was not empty, but did not
1104 contain an "@" character, Exim crashed. Now it writes a panic log message
1105 and treats the condition as false.
1107 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1109 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1110 extension "envelope-auth". The code is finished and in agreement with
1111 other implementations, but there is no documentation so far and in fact,
1112 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1113 not changing the active code.
1115 Print executed "if" and "elsif" statements when debugging is used. This
1116 helps a great deal to understand what a filter does.
1118 Document more things not specified clearly in RFC3028. I had all this
1119 sorted out, when out of a sudden new issues came to my mind. Oops."
1121 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1124 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1125 canonical form (as documented). However, after a host name lookup from
1126 the IP address, check_host() was doing a simple string comparison with
1127 addresses acquired from the DNS when checking that the found name did
1128 have the original IP as one of its addresses. Since any found IPv6
1129 addresses are likely to be in abbreviated form, the comparison could
1130 fail. Luckily, there already exists a function for doing the comparison
1131 by converting both addresses to binary, so now that is used instead of
1132 the text comparison.
1134 PH/20 There was another similar case to PH/19, when a complete host name was
1135 given in a host list; looking up its IP address could give an abbreviated
1136 form, whereas the current host's name might or might not be abbreviated.
1137 The same fix has been applied.
1143 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1144 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1147 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1148 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1150 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1152 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1153 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1154 Also, for "Auto-Submitted", treat anything other than "no" as
1155 non-personal, in accordance with RFC 3834. (Previously it treated
1156 anything starting "auto-" as non-personal.)
1158 TF/01 The control=submission/name=... option had a problem with syntax
1159 errors if the name included a slash character. The /name= option
1160 now slurps the rest of the string, so it can include any characters
1161 but it must come last in the list of options (after /sender_retain
1164 PH/05 Some modifications to the interface to the fake nameserver for the new
1172 TK/01 Added the "success_on_redirect" address verification option. See
1173 NewStuff for rationale and an example.
1175 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1177 PH/02 Patch to exigrep to allow it to work on syslog lines.
1179 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1180 fread() to skip over the body file's header line, because in Cygwin the
1181 header line is locked and is inaccessible.
1183 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1184 co-exist for some time) to make it clear that it is the Exim ID that is
1185 referenced, not the Message-ID: header line.
1187 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1188 string_format() function, because snprintf() does not exist on all
1191 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1192 ${stat: expansion item.
1194 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1195 protocol synchronization error", to keep the pedants happy.
1197 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1198 well as for IRIX systems, when gcc is being used. See the host.c source
1201 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1203 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1206 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1207 transport and to the smtp transport in LMTP mode.
1209 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1211 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1212 run a filter in a subprocess. This could lead to confusion in subsequent
1213 lookups in the parent process. There should also be a search_tidyup() at
1214 the end of the subprocess.
1216 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1217 only if the host matched helo_try_verify_hosts, which caused the
1218 verification to occur when the EHLO/HELO command was issued. The ACL just
1219 tested the remembered result. Now, if a previous verification attempt has
1220 not happened, "verify = helo" does it there and then.
1222 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1224 TK/03 Fix log output including CR from clamd.
1226 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1227 exist provoked a memory error which could cause a segfault.
1229 PH/15 Installed PCRE 6.2
1231 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1233 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1234 of the problem. Specifically, suggested +O2 rather than +O1 for the
1237 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1239 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1240 record, the port was not correctly logged when the outgoing_port log
1241 selector was set (it logged the transort's default port).
1243 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1244 fallback_hosts, and "hosts" in the smtp transport.
1246 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1247 host errors such as "Connection refused".
1249 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1250 authentication with radiusclient 0.4.9:
1252 - Error returned from rc_read_config was caught wrongly
1253 - Username/password not passed on to radius server due to wrong length.
1255 The presumption is that some radiusclient API changes for 4.51/PH/17
1256 were not taken care of correctly. The code is still untested by me (my
1257 Linux distribution still has 0.3.2 of radiusclient), but it was
1258 contributed by a Radius user.
1260 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1261 expanding the "port" option of the smtp transport.
1263 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1264 while reading a MIME header. Thanks to Tom Hughes for a patch.
1266 PH/24 Include config.h inside local_scan.h so that configuration settings are
1269 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1270 that in an ACL for RCPT (for example), you can examine exactly what was
1273 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1274 commands, but it was not correctly comparing the address with the actual
1275 client host address. Thus, it would show the EHLO address in Received:
1276 header lines when this was not necessary.
1278 PH/27 Added the % operator to ${eval:}.
1280 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1281 it should be ignoring failures (because with -C, for example, it has lost
1282 privilege). It wasn't ignoring creation failures other than "already
1285 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1288 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1289 because an input line was too long, either on its own, or by virtue of
1290 too many continuations, the temporary file was not being removed, and the
1291 return code was incorrect.
1293 PH/31 Missing "BOOL" in function definition in filtertest.c.
1295 PH/32 Applied Sieve patches from the maintainer.
1297 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1299 PH/33 Added "verify = not_blind".
1301 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1302 Local/Makefile (with some defaults set). These are used in built scripts
1303 such as exicyclog, but they have never been used in the exim_install
1304 script (though there are many overriding facilities there). I have
1305 arranged that the exim_install script now takes note of these two
1308 PH/35 Installed configuration files for Dragonfly.
1310 PH/36 When a locally submitted message by a trusted user did not contain a
1311 From: header, and the sender address was obtained from -f or from an SMTP
1312 MAIL command, and the trusted user did not use -F to supply a sender
1313 name, $originator_name was incorrectly used when constructing a From:
1314 header. Furthermore, $originator_name was used for submission mode
1315 messages from external hosts without From: headers in a similar way,
1316 which is clearly wrong.
1318 PH/37 Added control=suppress_local_fixups.
1320 PH/38 When log_selector = +received_sender was set, and the addition of the
1321 sender made the log line's construction buffer exactly full, or one byte
1322 less than full, an overflow happened when the terminating "\n" was
1325 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1326 when the result of a list match is failure because a DNS lookup failed.
1328 PH/40 RM_COMMAND is now used in the building process.
1330 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1331 the "build-* directories that it finds.
1333 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1334 address in a domain literal was a prefix of an interface address.
1336 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1337 when verifying a sender address, unless rewrite_headers is false.
1339 PH/44 Wrote a long comment about why errors_to addresses are verified as
1340 recipients, not senders.
1342 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1343 the ratelimit ACL was added.
1345 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1347 PH/46 Added extra information about PostgreSQL errors to the error string.
1349 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1350 avoiding the need to install special zones in a real server. This is
1351 backwards compatible; if it can't find the fake resolver, it drops back.
1352 Thus, both old and new test suites can be run.
1354 TF/02 Added util/ratelimit.pl
1356 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1357 clock is set back in time.
1359 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1360 Candler <B.Candler@pobox.com>.
1362 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1363 OK for addresses that are the result of redirections.
1365 PH/48 A number of further additions for the benefit of the new test suite,
1366 including a fake gethostbyname() that interfaces to the fake DNS resolver
1369 TF/06 The fix for widen_domains has also been applied to qualify_single and
1370 search_parents which are the other dnslookup options that can cause
1373 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1376 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1378 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1379 service" if it encountered an MX record with an empty target hostname.
1380 The message is now "an MX or SRV record indicated no SMTP service".
1382 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1383 if the DNS of the sending site is misconfigured. This is quite a
1384 common situation. This change restores the behaviour of treating a
1385 helo verification defer as a failure.
1387 PH/51 If self=fail was set on a router, the bounce message did not include the
1388 actual error message.
1394 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1396 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1397 command itself ended in error, the underlying message about the transport
1398 filter timeout was being overwritten with the pipe command error. Now the
1399 underlying error message should be appended to the second error message.
1401 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1403 PH/02 Reduce the amount of output that "make" produces by default. Full output
1404 can still be requested.
1406 PH/03 The warning log line about a condition test deferring for a "warn" verb
1407 was being output only once per connection, rather than after each
1408 occurrence (because it was using the same function as for successful
1409 "warn" verbs). This seems wrong, so I have changed it.
1411 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1412 it should not have, which might have caused a crash in the right
1413 circumstances, but probably never did.
1415 PH/04 Installed a modified version of Tony Finch's patch to make submission
1416 mode fix the return path as well as the Sender: header line, and to
1417 add a /name= option so that you can make the user's friendly name appear
1420 TF/03 Added the control = fakedefer ACL modifier.
1422 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1423 Mark Lowes for thorough testing.
1425 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1427 TK/03 Merged latest SRS patch from Miles Wilton.
1429 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1430 with the definition in sysexits.h (which is #included earlier).
1431 Fortunately, Exim does not actually use EX_OK. The code used to try to
1432 preserve the sysexits.h value, by assumimg that macro definitions were
1433 scanned for macro replacements. I have been disabused of this notion,
1434 so now the code just undefines EX_OK before #including unistd.h.
1436 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1437 in the smtp transport. When a block could not be written in a single
1438 write() function, the timeout was being re-applied to each part-write.
1439 This seems wrong - if the receiver was accepting one byte at a time it
1440 would take for ever. The timeout is now adjusted when this happens. It
1441 doesn't have to be particularly precise.
1443 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1444 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1446 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1447 without a domain if the check to <postmaster@domain> fails.
1449 SC/01 Eximstats: added -xls and the ability to specify output files
1450 (patch written by Frank Heydlauf).
1452 SC/02 Eximstats: use FileHandles for outputing results.
1454 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1456 SC/04 Eximstats: fixed display of large numbers with -nvr option
1458 SC/05 Eximstats: fixed merging of reports with empty tables.
1460 SC/06 Eximstats: added the -include_original_destination flag
1462 SC/07 Eximstats: removed tabs and trailing whitespace.
1464 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1466 TK/06 MBOX spool code: Add real "From " MBOX separator line
1467 so the .eml file is really in mbox format (even though
1468 most programs do not really care). Patch from Alex Miller.
1470 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1471 The latter is generated from $received_to and is only set if the
1472 message has one envelope recipient. SA can use these headers,
1473 obviously out-of-the-box. Patch from Alex Miller.
1475 PH/08 The ${def test on a variable was returning false if the variable's
1476 value was "0", contrary to what the specification has always said!
1477 The result should be true unless the variable is empty.
1479 PH/09 The syntax error of a character other than { following "${if
1480 def:variable_name" (after optional whitespace) was not being diagnosed.
1481 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1482 accidental colon was present, for example, could give incorrect results.
1484 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1485 result is used (not including appendfile, where other changes are about
1488 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1489 This involved changing a lot of size variables from int to off_t. It
1490 should work with maildirs and everything.
1492 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1493 spamd dying while we are connected to it.
1495 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1498 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1499 function for BDB 4.3.
1501 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1503 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1504 the sources for PCRE have been re-arranged and more files are now
1507 PH/15 The code I had for printing potentially long long variables in PH/11
1508 above was not the best (it lost precision). The length of off_t variables
1509 is now inspected at build time, and an appropriate printing format (%ld
1510 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1511 to be "long long int" or "long int". This is needed for the internal
1512 formatting function string_vformat().
1514 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1515 the configuration file to be ":syslog", then the script "guesses" where
1516 the logs files are, rather than using the compiled in default. In our
1517 case the guess is not the same as the compiled default, so the script
1518 suddenly stopped working when I started to use syslog. The patch checks
1519 to see if log_file_path is "". If so, it attempts to read it from exim
1520 with no configuration file to get the compiled in version, before it
1521 falls back to the previous guessing code."
1523 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1524 implementing BATV in an Exim configuration. See NewStuff for the gory
1527 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1528 Makefile that are specific to HP-UX.
1530 PH/18 If the "use_postmaster" option was set for a recipient callout together
1531 with the "random" option, the postmaster address was used as the MAIL
1532 FROM address for the random test, but not for the subsequent recipient
1533 test. It is now used for both.
1535 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1536 patch removes a few documentation additions to RFC 3028, because the
1537 latest draft now contains them. It adds the new en;ascii-case comparator
1538 and a new error check for 8bit text in MIME parts. Comparator and
1539 require names are now matched exactly. I enabled the subaddress
1540 extension, but it is not well tested yet (read: it works for me)."
1542 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1543 rework some of the code of TK/09 above to avoid the hardwired use of
1544 "%lld" and "long long". Replaced the call to snprintf() with a call to
1547 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1548 records point to non-existent hosts", "retry timeout exceeded", and
1549 "retry time not reached for any host after a long failure period".
1551 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1552 experimental DomainKeys support:
1554 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1555 (2) On an error such as an illegally used "control", the wrong name for
1556 the control was given.
1558 These problems did NOT occur unless DomainKeys support was compiled.
1560 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1562 PH/24 Added ${if match_ip condition.
1564 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1565 databases so that it will be absolutely obvious if a crash occurs in the
1566 DB library. This is a regular occurrence (often caused by mis-matched
1569 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1570 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1571 picked up on a user's system that detects such things. There doesn't seem
1572 to be a gcc warning option for this - only an attribute that has to be
1573 put on the function's prototype. It seems that in Fedora Core 4 they have
1574 set this on a number of new functions. No doubt there will be more in due
1577 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1578 specify a transport. However, if an address that was verified by such a
1579 router was the subject of a callout, Exim crashed because it tried to
1580 read the rcpt_include_affixes from the non-existent transport. Now it
1581 just assumes that the setting of that option is false. This bug was
1582 introduced by 4.51/PH/31.
1584 PH/28 Changed -d+all to exclude +memory, because that information is very
1585 rarely of interest, but it makes the output a lot bigger. People tend to
1586 do -d+all out of habit.
1588 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1589 code in os-type was giving problems when libc.so lives in lib64, like on
1592 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1593 aren't the modern standard, and it seems that some systems' include files
1594 don't always have them. Exim was already checking for some of the newer
1595 ones like T_AAAA, and defining it itself. I've added checks for all the
1596 record types that Exim uses.
1598 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1599 not automatically generating a new one, as it is supposed to. This
1600 prevented TLS from working. If the file did exist, but contained invalid
1601 data, a new version was generated, as expected. It was only the case of a
1602 non-existent file that was broken.
1604 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1605 with a change in libdomainkeys > 0.64.
1607 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1608 from DNS. If the selector record carries the flag, it now has
1609 precedence over the domain-wide flag.
1611 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1613 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1614 the use of a port name that isn't defined in /etc/services) occurred, the
1615 message was deferred as in a normal delivery, and thus remained on the
1616 spool, instead of being failed because of the mua_wrapper setting. This
1617 is now fixed, and I tidied up some of the mua_wrapper messages at the
1620 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1621 the messages in a hash of arrays rather than using individual hashes.
1622 This is a bit cleaner and results in dramatic memory savings, albeit
1623 at a slight CPU cost.
1625 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1626 as requested by Marc Sherman.
1628 SC/10 Eximstats: added histograms for user specified patterns as requested
1631 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1633 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1634 fopen() in the content-scanning modules that did not already have it.
1640 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1641 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1643 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1645 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1647 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1648 to test Sieve filters that use "vacation".
1650 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1651 that changes the way the GnuTLS parameters are stored in the cache file.
1652 The new format can be generated externally. For backward compatibility,
1653 if the data in the cache doesn't make sense, Exim assumes it has read an
1654 old-format file, and it generates new data and writes a new file. This
1655 means that you can't go back to an older release without removing the
1658 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1659 work if there are any delivery delays because "one_time" forces the
1660 parent to be marked "delivered", so its unseen clone is never tried
1661 again. For this reason, Exim now forbids the simultaneous setting of
1664 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1665 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1666 entry if you want to know the details. The fix, however, neglected to
1667 consider the case when local delivery batching is involved. The test for
1668 "previously delivered" was not happening when checking to see if an
1669 address could be batched with a previous (undelivered) one; under
1670 certain circumstances this could lead to multiple deliveries to the same
1673 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1674 in its include files, and this causes problems building Exim.
1676 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1677 header_syntax) but Exim was just ignoring anything given after a slash.
1678 In particular, this caused confusion with an attempt to use "verify =
1679 reverse_host_lookup/defer_ok". An error is now given when options are
1680 supplied for verify items that do not have them. (Maybe reverse_host_
1681 lookup should have a defer_ok option, but that's a different point.)
1683 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1684 defined by RFC 821) to 2048, because there were problems with some AUTH
1685 commands, and RFC 1869 says the size should be increased for extended
1686 SMTP commands that take arguments.
1688 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1691 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1692 "unknown" error; now it says that the functionality isn't in the binary.
1694 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1695 an address' error message when a string expansion fails (syntax or
1696 whatever). Otherwise the password may appear in the log. Following change
1697 PH/42 below, there is no longer a chance of it appearing in a bounce
1700 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1702 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1703 of its addresses was ever tried. (Bugzilla bug #2.)
1705 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1706 the result incorrectly in the debug output. (It correctly added a newline
1707 to what was transported.)
1709 TF/01 Added $received_time.
1711 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1712 commented out examples of how to interface to a virus scanner and to
1713 SpamAssassin. Also added commented examples of av_scanner and
1714 spamd_address settings.
1716 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1717 and controls are allowed in which ACLs. There were a couple of minor
1718 errors. Some of the entries in the conditions table (which is a table of
1719 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1720 negation of where the condition IS allowed.
1722 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1724 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1725 header file does not have a version number, so I've had to invent a new
1726 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1727 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1728 radiusclient), but it was contributed by a Radius user.
1730 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1731 files or directories, for OpenSSL.
1733 PH/19 When an Exim process that is running as root has to create an Exim log
1734 file, it does so in a subprocess that runs as exim:exim so as to get the
1735 ownership right at creation (otherwise, other Exim processes might see
1736 the file with the wrong ownership). There was no test for failure of this
1737 fork() call, which would lead to the process getting stuck as it waited
1738 for a non-existent subprocess. Forks do occasionally fail when resources
1739 run out. I reviewed all the other calls to fork(); they all seem to check
1742 PH/20 When checking for unexpected SMTP input at connect time (before writing
1743 the banner), Exim was not dealing correctly with a non-positive return
1744 from the read() function. If the client had disconnected by this time,
1745 the result was a log entry for a synchronization error with an empty
1746 string after "input=" when read() returned zero. If read() returned -1
1747 (an event I could not check), uninitialized data bytes were printed.
1748 There were reports of junk text (parts of files, etc) appearing after
1751 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1753 PH/22 Added support for macro redefinition, and (re)definition in between
1754 driver and ACL definitions.
1756 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1757 forgetting to use the resulting value; it was using the unexpanded value.
1759 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1760 hadn't been configured. The fix is from Juergen Kreileder, who
1761 understands it better than I do:
1763 "Here's what I see happening with three configured cyrus_sasl
1764 authenticators configured (plain, login, cram-md5):
1766 On startup auth_cyrus_sasl_init() gets called for each of these.
1767 This means three calls to sasl_listmech() without a specified mech_list.
1768 => SASL tests which mechs of all available mechs actually work
1769 => three warnings about OTP not working
1770 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1772 With the patch, sasl_listmech() also gets called three times. But now
1773 SASL's mech_list option is set to the server_mech specified in the the
1774 authenticator. Or in other words, the answer from sasl_listmech()
1775 gets limited to just the mech you're testing for (which is different
1777 => the return list contains just 'plain' or 'login', 'cram-md5' or
1778 nothing depending on the value of ob->server_mech.
1780 I've just tested the patch: Authentication still works fine,
1781 unavailable mechs specified in the exim configuration are still
1782 caught, and the auth.log warnings about OTP are gone."
1784 PH/25 When debugging is enabled, the contents of the command line are added
1785 to the debugging output, even when log_selector=+arguments is not
1788 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1789 answer is "GNU", and only if the return is "GNU/something" is the answer
1792 PH/27 $acl_verify_message is now set immediately after the failure of a
1793 verification in an ACL, and so is available in subsequent modifiers. In
1794 particular, the message can be preserved by coding like this:
1796 warn !verify = sender
1797 set acl_m0 = $acl_verify_message
1799 Previously, $acl_verify_message was set only while expanding "message"
1800 and "log_message" when a very denied access.
1802 PH/28 Modified OS/os.c-Linux with
1804 -#ifndef OS_LOAD_AVERAGE
1805 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1807 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1808 nomenclature these days.)
1810 PH/29 Installed patch from the Sieve maintainer that adds the options
1811 sieve_useraddress and sieve_subaddress to the redirect router.
1813 PH/30 In these circumstances:
1814 . Two addresses routed to the same list of hosts;
1815 . First host does not offer TLS;
1816 . First host accepts first address;
1817 . First host gives temporary error to second address;
1818 . Second host offers TLS and a TLS session is established;
1819 . Second host accepts second address.
1820 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1821 and peerdn, if requested) that were in fact used only for the second
1824 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1825 attention to any local part prefix or suffix that was matched by the
1826 router that accepted the address. It now behaves in the same way as it
1827 does for delivery: the affixes are removed from the local part unless
1828 rcpt_include_affixes is set on the transport.
1830 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1831 timeout during the DATA phase of an incoming message.
1833 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1834 applied a patch sanctioned by the Sieve maintainer.
1836 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1837 the uid or gid is negative. A case of a negative gid caused this to be
1838 noticed. The fix allows for either to be negative.
1840 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1841 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1844 PH/36 The change PH/12 above was broken. Fixed it.
1846 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1847 the grounds that routing the same address twice would always produce the
1848 same answer. This might have been true once, but it is certainly no
1849 longer true now. Routing a child address may depend on the previous
1850 routing that produced that child. Some complicated redirection strategies
1851 went wrong when messages had multiple recipients, and made Exim's
1852 behaviour dependent on the order in which the addresses were given.
1854 I have moved the duplicate checking until after the routing is complete.
1855 Exim scans the addresses that are assigned to local and remote
1856 transports, and removes any duplicates. This means that more work will be
1857 done, as duplicates will always all be routed, but duplicates are
1858 presumably rare, so I don't expect this is of any significance.
1860 For deliveries to pipes, files, and autoreplies, the duplicate checking
1861 still happens during the routing process, since they are not going to be
1864 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1865 It corrects a timeout issue with spamd. This is Ian's comment: "The
1866 background is that sometimes spamd either never reads data from a
1867 connection it has accepted, or it never writes response data. The exiscan
1868 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1869 blindly assumes that writes won't block so it may never time out."
1871 PH/39 Allow G after quota size as well as K and M.
1873 PH/40 The value set for $authenticated_id in an authenticator may not contain
1874 binary zeroes or newlines because the value is written to log lines and
1875 to spool files. There was no check on this. Now the value is run through
1876 the string_printing() function so that such characters are converted to
1877 printable escape sequences.
1879 PH/41 $message_linecount is a new variable that contains the total number of
1880 lines in the message. Compare $body_linecount, which is the count for the
1883 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1884 bounce and delay warning messages, except in certain special cases, which
1887 (a) An SMTP error message from a remote host;
1888 (b) A message specified in a :fail: redirection;
1889 (c) A message specified in a "fail" command in a system filter;
1890 (d) A message specified in a FAIL return from the queryprogram router;
1891 (e) A message specified by the cannot_route_message router option.
1893 In these cases only, Exim does include the error details in bounce and
1894 warning messages. There are also a few cases where bland messages such
1895 as "unrouteable address" or "local delivery error" are given.
1897 PH/43 $value is now also set for the "else" part of a ${run expansion.
1899 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1900 being worked on, but at least Exim now implements the latest version to
1903 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1904 process to complete was treated as a delivery failure, a timeout while
1905 writing the message to the pipe was logged, but erroneously treated as a
1906 successful delivery. Such timeouts include transport filter timeouts. For
1907 consistency with the overall process timeout, these timeouts are now
1908 treated as errors, giving rise to delivery failures by default. However,
1909 there is now a new Boolean option for the pipe transport called
1910 timeout_defer, which, if set TRUE, converts the failures into defers for
1911 both kinds of timeout. A transport filter timeout is now identified in
1914 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1915 systems where "make" and "gmake" are different, calling "gmake" at top
1916 level broke things. I've arranged for the value of $(MAKE) to be passed
1917 from the Makefile to this script so that it can call the same version of
1921 A note about Exim versions 4.44 and 4.50
1922 ----------------------------------------
1924 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1925 changes of various kinds. As a consequence, a big documentation update was
1926 needed. This delayed the release for rather longer than seemed good, especially
1927 in the light of a couple of (minor) security issues. Therefore, the changes
1928 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1929 release. So 4.44 and 4.50 are in effect two different branches that both start
1932 I have left the 4.50 change log unchanged; it contains all the changes since
1933 4.43. The change log for 4.44 is below; many of its items are identical to
1934 those for 4.50. This seems to be the most sensible way to preserve the
1935 historical information.
1941 1. Minor wording change to the doc/README.SIEVE file.
1943 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1944 computation of the current number of files was incorrect.
1946 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1947 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1950 4. Give more explanation in the error message when the command for a transport
1951 filter fails to execute.
1953 5. There are several places where Exim runs a non-Exim command in a
1954 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1955 was being done only for the command run by the queryprogram router. It is
1956 now done for all such subprocesses. The other cases are: ${run, transport
1957 filters, and the commands run by the lmtp and pipe transports.
1959 6. Added CONFIGURE_GROUP build-time option.
1961 7. Some older OS have a limit of 256 on the maximum number of file
1962 descriptors. Exim was using setrlimit() to set 1000 as a large value
1963 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1964 systems. I've change it so that if it can't get 1000, it tries for 256.
1966 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1967 was an oversight, and furthermore, ever since the addition of extra
1968 controls (e.g. 4.43/32), the checks on when to allow different forms of
1969 "control" were broken. There should now be diagnostics for all cases when a
1970 control that does not make sense is encountered.
1972 9. Added the /retain_sender option to "control=submission".
1974 10. $recipients is now available in the predata ACL (oversight).
1976 11. Tidy the search cache before the fork to do a delivery from a message
1977 received from the command line. Otherwise the child will trigger a lookup
1978 failure and thereby defer the delivery if it tries to use (for example) a
1979 cached ldap connection that the parent has called unbind on.
1981 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1982 of $address_data from the recipient verification was clobbered by the
1983 sender verification.
1985 13. The value of address_data from a sender verification is now available in
1986 $sender_address_data in subsequent conditions in the ACL statement.
1988 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1990 15. Added a new option "connect=<time>" to callout options, to set a different
1993 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1994 was its contents. (It was OK if the option was not defined at all.)
1996 17. A "Completed" log line is now written for messages that are removed from
1997 the spool by the -Mrm option.
1999 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2000 information about exactly what failed.
2002 19. Added -dd to debug only the daemon process.
2004 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2005 handles timeouts, both on the server side and network timeouts. Renamed the
2006 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2008 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2009 It is now set to "smtps".
2011 22. $host_address is now set to the target address during the checking of
2012 ignore_target_hosts.
2014 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2015 being passed; this would have caused $sender_host_name to have been used if
2016 matching the list had actually called for a host name (not very likely,
2017 since this list is usually IP addresses). A host name is now passed as
2020 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2021 code that specifies a non-restarting handler (typically sigaction() in
2022 modern systems) in an attempt to fix a rare and obscure crash bug.
2024 25. Narrowed the window for a race in the daemon that could cause it to ignore
2025 SIGCHLD signals. This is not a major problem, because they are used only to
2026 wake it up if nothing else does.
2028 26. A malformed maildirsize file could cause Exim to calculate negative values
2029 for the mailbox size or file count. Odd effects could occur as a result.
2030 The maildirsize information is now recalculated if the size or filecount
2033 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2034 support for a long time. Removed HAVE_SYS_VFS_H.
2036 28. Installed the latest version of exipick from John Jetmore.
2038 29. In an address list, if the pattern was not a regular expression, an empty
2039 subject address (from a bounce message) matched only if the pattern was an
2040 empty string. Non-empty patterns were not even tested. This was the wrong
2041 because it is perfectly reasonable to use an empty address as part of a
2042 database query. An empty address is now tested by patterns that are
2043 lookups. However, all the other forms of pattern expect the subject to
2044 contain a local part and a domain, and therefore, for them, an empty
2045 address still always fails if the pattern is not itself empty.
2047 30. Exim went into a mad DNS loop when attempting to do a callout where the
2048 host was specified on an smtp transport, and looking it up yielded more
2049 than one IP address.
2051 31. Re-factored the code for checking spool and log partition space into a
2052 function that finds that data and another that does the check. The former
2053 is then used to implement four new variables: $spool_space, $log_space,
2054 $spool_inodes, and $log_inodes.
2056 32. The RFC2047 encoding function was originally intended for short strings
2057 such as real names; it was not keeping to the 75-character limit for
2058 encoded words that the RFC imposes. It now respects the limit, and
2059 generates multiple encoded words if necessary. To be on the safe side, I
2060 have increased the buffer size for the ${rfc2047: expansion operator from
2063 33. It is now permitted to omit both strings after an "if" condition; if the
2064 condition is true, the result is "true". As before, when the second string
2065 is omitted, a false condition yields an empty string. This makes it less
2066 cumbersome to write custom ACL and router conditions.
2068 34. Failure to deliver a bounce message always caused it to be frozen, even if
2069 there was an errors_to setting on the router. The errors_to setting is now
2072 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2073 canonical form (fully expanded) before being placed in
2074 $sender_host_address.
2076 36. The table in the code that translates DNS record types into text (T_A to
2077 "A" for instance) was missing entries for NS and CNAME. It is just possible
2078 that this could have caused confusion if both these types were looked up
2079 for the same domain, because the text type is used as part of Exim's
2080 per-process caching. But the chance of anyone hitting this buglet seems
2083 37. The dnsdb lookup has been extended in a number of ways.
2085 (1) There is a new type, "zns", which walks up the domain tree until it
2086 finds some nameserver records. It should be used with care.
2088 (2) There is a new type, "mxh", which is like "mx" except that it returns
2089 just the host names, not the priorities.
2091 (3) It is now possible to give a list of domains (or IP addresses) to be
2092 looked up. The behaviour when one of the lookups defers can be
2093 controlled by a keyword.
2095 (4) It is now possible to specify the separator character for use when
2096 multiple records are returned.
2098 38. The dnslists ACL condition has been extended: it is now possible to supply
2099 a list of IP addresses and/or domains to be looked up in a particular DNS
2102 39. Added log_selector=+queue_time_overall.
2104 40. When running the queue in the test harness, wait just a tad after forking a
2105 delivery process, to get repeatability of debugging output.
2107 41. Include certificate and key file names in error message when GnuTLS fails
2108 to set them up, because the GnuTLS error message doesn't include the name
2109 of the failing file when there is a problem reading it.
2111 42. Allow both -bf and -bF in the same test run.
2113 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2115 44. The "Exiscan patch" is now merged into the mainline Exim source.
2117 45. Sometimes the final signoff response after QUIT could fail to get
2118 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2119 < 0 before doing a fflush(). This bug looks as though it goes back to the
2120 introduction of TLS in release 3.20, but "sometimes" must have been rare
2121 because the tests only now provoked it.
2123 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2124 (this can affect the format of dates).
2126 47. exim_tidydb, when checking for the continued existence of a message for
2127 which it has found a message-specific retry record, was not finding
2128 messages that were in split spool directories. Consequently, it was
2129 deleting retry records that should have stayed in existence.
2131 48. Steve fixed some bugs in eximstats.
2133 49. The SPA authentication driver was not abandoning authentication and moving
2134 on to the next authenticator when an expansion was forced to fail,
2135 contradicting the general specification for all authenticators. Instead it
2136 was generating a temporary error. It now behaves as specified.
2138 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2139 (the order specifies the preference for clients). The order is now AES256,
2140 AES128, 3DES, ARCFOUR128.
2142 51. Small patch to Sieve code - explicitly set From: when generating an
2145 52. Exim crashed if a remote delivery caused a very long error message to be
2146 recorded - for instance if somebody sent an entire SpamAssassin report back
2147 as a large number of 550 error lines. This bug was coincidentally fixed by
2148 increasing the size of one of Exim's internal buffers (big_buffer) that
2149 happened as part of the Exiscan merge. However, to be on the safe side, I
2150 have made the code more robust (and fixed the comments that describe what
2153 53. Now that there can be additional text after "Completed" in log lines (if
2154 the queue_time_overall log selector is set), a one-byte patch to exigrep
2155 was needed to allow it to recognize "Completed" as not the last thing in
2158 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2159 patch that reportedly fixes this has been added. I am not expert enough to
2160 create a test for it. This is what the patch creator wrote:
2162 "I found a little strange behaviour of ldap code when working with
2163 Windows 2003 AD Domain, where users was placed in more than one
2164 Organization Units. When I tried to give exim partial DN, the exit code
2165 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2166 But simultaneously result of request was absolutely normal ldap result,
2167 so I produce this patch..."
2169 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2170 REFERENCE, so I have modified the code to exclude the patch when that macro
2173 55. Some experimental protocols are using DNS PTR records for new purposes. The
2174 keys for these records are domain names, not reversed IP addresses. The
2175 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2176 leaves it alone. Component reversal etc. now happens only for IP addresses.
2179 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2181 57. Double the size of the debug message buffer (to 2048) so that more of very
2182 long debug lines gets shown.
2184 58. The exicyclog utility now does better if the number of log files to keep
2185 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2187 59. Two changes related to the smtp_active_hostname option:
2189 (1) $smtp_active_hostname is now available as a variable.
2190 (2) The default for smtp_banner uses $smtp_active_hostname instead
2191 of $primary_hostname.
2193 60. The host_aton() function is supposed to be passed a string that is known
2194 to be a valid IP address. However, in the case of IPv6 addresses, it was
2195 not checking this. This is a hostage to fortune. Exim now panics and dies
2196 if the condition is not met. A case was found where this could be provoked
2197 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2198 components; fortuitously, this particular loophole had already been fixed
2199 by change 4.50/55 above.
2201 If there are any other similar loopholes, the new check in host_aton()
2202 itself should stop them being exploited. The report I received stated that
2203 data on the command line could provoke the exploit when Exim was running as
2204 exim, but did not say which command line option was involved. All I could
2205 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2206 running as the user.
2209 61. There was a buffer overflow vulnerability in the SPA authentication code
2210 (which came originally from the Samba project). I have added a test to the
2211 spa_base64_to_bits() function which I hope fixes it.
2214 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2215 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2217 63. The daemon start-up calls getloadavg() while still root for those OS that
2218 need the first call to be done as root, but it missed one case: when
2219 deliver_queue_load_max is set with deliver_drop_privilege. This is
2220 necessary for the benefit of the queue runner, because there is no re-exec
2221 when deliver_drop_privilege is set.
2223 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2224 This has been fixed.
2226 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2227 was in use, was not putting the data itself into the right store pool;
2228 consequently, it could be overwritten for a subsequent message in the same
2229 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2232 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2234 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2235 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2236 the function were treating the return as a boolean value, which happened to
2237 work because 0=false and not-0=true, but is not correct code.
2239 68. The host_aton() function was not handling scoped IPv6 addresses (those
2240 with, for example, "%eth0" on the end) correctly.
2242 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2243 negated items (that is, ~something) in unsigned ints. Some compilers
2244 apparently mutter when there is no cast.
2246 70. If an address verification called from an ACL failed, and did not produce a
2247 user-specific message (i.e. there was only a "system" message), nothing was
2248 put in $acl_verify_message. In this situation, it now puts the system
2251 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2252 session; change 4.31/43 added the unwanted input to the log line - except
2253 that it did not do this in the start of session case. It now does.
2255 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2256 This is wrong and can cause the other end to generate a synchronization
2257 error if it is another Exim or anything else that does the synchronization
2258 check. A QUIT command is no longer sent after a timeout.
2260 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2261 during host lookups.
2263 74. The defer_ok option of callout verification was not working if it was used
2264 when verifying addresses in header lines, that is, for this case:
2266 verify = header_sender/callout=defer_ok
2268 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2269 those file descriptors could be used for SMTP connections. If anything
2270 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2271 could be sent to the SMTP client, causing chaos. The daemon now opens
2272 stdin, stdout, and stderr to /dev/null when it puts itself into the
2275 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2276 log by default. The user can override this with suitable Perl magic.
2278 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2279 the log message when discard triggers, was not working for the DATA ACL or
2280 for the non-SMTP ACL.
2282 78. Error message wording change in sieve.c.
2284 79. If smtp_accept_max_per_host was set, the number of connections could be
2285 restricted to fewer than expected, because the daemon was trying to set up
2286 a new connection before checking whether the processes handling previous
2287 connections had finished. The check for completed processes is now done
2288 earlier. On busy systems, this bug wouldn't be noticed because something
2289 else would have woken the daemon, and it would have reaped the completed
2292 80. If a message was submitted locally by a user whose login name contained one
2293 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2294 It caused a spool format error. I have fixed the spool reading code. A
2295 related problem was that the "from" clause in the Received: line became
2296 illegal because of the space(s). It is now covered by ${quote_local_part.
2298 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2301 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2303 83. Patch from Sieve maintainer to fix unterminated string problem in
2304 "vacation" handling.
2306 84. Some minor changes to the Linux configuration files to help with other
2307 OS variants using glibc.
2309 85. One more patch for Sieve to update vacation handling to latest spec.
2312 ----------------------------------------------------
2313 See the note above about the 4.44 and 4.50 releases.
2314 ----------------------------------------------------
2320 1. Change 4.43/35 introduced a bug that caused file counts to be
2321 incorrectly computed when quota_filecount was set in an appendfile
2324 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2325 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2328 3. Give more explanation in the error message when the command for a transport
2329 filter fails to execute.
2331 4. There are several places where Exim runs a non-Exim command in a
2332 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2333 was being done only for the command run by the queryprogram router. It is
2334 now done for all such subprocesses. The other cases are: ${run, transport
2335 filters, and the commands run by the lmtp and pipe transports.
2337 5. Some older OS have a limit of 256 on the maximum number of file
2338 descriptors. Exim was using setrlimit() to set 1000 as a large value
2339 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2340 systems. I've change it so that if it can't get 1000, it tries for 256.
2342 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2343 was an oversight, and furthermore, ever since the addition of extra
2344 controls (e.g. 4.43/32), the checks on when to allow different forms of
2345 "control" were broken. There should now be diagnostics for all cases when a
2346 control that does not make sense is encountered.
2348 7. $recipients is now available in the predata ACL (oversight).
2350 8. Tidy the search cache before the fork to do a delivery from a message
2351 received from the command line. Otherwise the child will trigger a lookup
2352 failure and thereby defer the delivery if it tries to use (for example) a
2353 cached ldap connection that the parent has called unbind on.
2355 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2356 of $address_data from the recipient verification was clobbered by the
2357 sender verification.
2359 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2360 was its contents. (It was OK if the option was not defined at all.)
2362 11. A "Completed" log line is now written for messages that are removed from
2363 the spool by the -Mrm option.
2365 12. $host_address is now set to the target address during the checking of
2366 ignore_target_hosts.
2368 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2369 being passed; this would have caused $sender_host_name to have been used if
2370 matching the list had actually called for a host name (not very likely,
2371 since this list is usually IP addresses). A host name is now passed as
2374 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2375 code that specifies a non-restarting handler (typically sigaction() in
2376 modern systems) in an attempt to fix a rare and obscure crash bug.
2378 15. Narrowed the window for a race in the daemon that could cause it to ignore
2379 SIGCHLD signals. This is not a major problem, because they are used only to
2380 wake it up if nothing else does.
2382 16. A malformed maildirsize file could cause Exim to calculate negative values
2383 for the mailbox size or file count. Odd effects could occur as a result.
2384 The maildirsize information is now recalculated if the size or filecount
2387 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2388 support for a long time. Removed HAVE_SYS_VFS_H.
2390 18. Updated exipick to current release from John Jetmore.
2392 19. Allow an empty sender to be matched against a lookup in an address list.
2393 Previously the only cases considered were a regular expression, or an
2396 20. Exim went into a mad DNS lookup loop when doing a callout where the
2397 host was specified on the transport, if the DNS lookup yielded more than
2400 21. The RFC2047 encoding function was originally intended for short strings
2401 such as real names; it was not keeping to the 75-character limit for
2402 encoded words that the RFC imposes. It now respects the limit, and
2403 generates multiple encoded words if necessary. To be on the safe side, I
2404 have increased the buffer size for the ${rfc2047: expansion operator from
2407 22. Failure to deliver a bounce message always caused it to be frozen, even if
2408 there was an errors_to setting on the router. The errors_to setting is now
2411 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2412 canonical form (fully expanded) before being placed in
2413 $sender_host_address.
2415 24. Updated eximstats to version 1.33
2417 25. Include certificate and key file names in error message when GnuTLS fails
2418 to set them up, because the GnuTLS error message doesn't include the name
2419 of the failing file when there is a problem reading it.
2421 26. Expand error message when OpenSSL has problems setting up cert/key files.
2424 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2425 (this can affect the format of dates).
2427 28. exim_tidydb, when checking for the continued existence of a message for
2428 which it has found a message-specific retry record, was not finding
2429 messages that were in split spool directories. Consequently, it was
2430 deleting retry records that should have stayed in existence.
2432 29. eximstats updated to version 1.35
2433 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2434 1.35 - bugfix such that pie charts by volume are generated correctly
2436 30. The SPA authentication driver was not abandoning authentication and moving
2437 on to the next authenticator when an expansion was forced to fail,
2438 contradicting the general specification for all authenticators. Instead it
2439 was generating a temporary error. It now behaves as specified.
2441 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2442 (the order specifies the preference for clients). The order is now AES256,
2443 AES128, 3DES, ARCFOUR128.
2445 31. Small patch to Sieve code - explicitly set From: when generating an
2448 32. Exim crashed if a remote delivery caused a very long error message to be
2449 recorded - for instance if somebody sent an entire SpamAssassin report back
2450 as a large number of 550 error lines. This bug was coincidentally fixed by
2451 increasing the size of one of Exim's internal buffers (big_buffer) that
2452 happened as part of the Exiscan merge. However, to be on the safe side, I
2453 have made the code more robust (and fixed the comments that describe what
2456 33. Some experimental protocols are using DNS PTR records for new purposes. The
2457 keys for these records are domain names, not reversed IP addresses. The
2458 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2459 leaves it alone. Component reversal etc. now happens only for IP addresses.
2462 34. The host_aton() function is supposed to be passed a string that is known
2463 to be a valid IP address. However, in the case of IPv6 addresses, it was
2464 not checking this. This is a hostage to fortune. Exim now panics and dies
2465 if the condition is not met. A case was found where this could be provoked
2466 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2467 components; fortuitously, this particular loophole had already been fixed
2468 by change 4.50/55 or 4.44/33 above.
2470 If there are any other similar loopholes, the new check in host_aton()
2471 itself should stop them being exploited. The report I received stated that
2472 data on the command line could provoke the exploit when Exim was running as
2473 exim, but did not say which command line option was involved. All I could
2474 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2475 running as the user.
2478 35. There was a buffer overflow vulnerability in the SPA authentication code
2479 (which came originally from the Samba project). I have added a test to the
2480 spa_base64_to_bits() function which I hope fixes it.
2483 36. The daemon start-up calls getloadavg() while still root for those OS that
2484 need the first call to be done as root, but it missed one case: when
2485 deliver_queue_load_max is set with deliver_drop_privilege. This is
2486 necessary for the benefit of the queue runner, because there is no re-exec
2487 when deliver_drop_privilege is set.
2489 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2490 was in use, was not putting the data itself into the right store pool;
2491 consequently, it could be overwritten for a subsequent message in the same
2492 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2495 38. Sometimes the final signoff response after QUIT could fail to get
2496 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2497 < 0 before doing a fflush(). This bug looks as though it goes back to the
2498 introduction of TLS in release 3.20, but "sometimes" must have been rare
2499 because the tests only now provoked it.
2505 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2506 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2507 Now it returns an integer. A number of calls were still expecting a T/F
2508 return. Fortuitously, in all cases, the tests worked in OK situations,
2509 which is the norm. However, things would have gone wrong on any write
2510 failures on the smtp file descriptor. This function is used when sending
2511 messages over SMTP and also when doing verify callouts.
2513 2. When Exim is called to do synchronous delivery of a locally submitted
2514 message (the -odf or -odi options), it no longer closes stderr before doing
2517 3. Implemented the mua_wrapper option.
2519 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2521 5. Implemented the functions header_remove(), header_testname(),
2522 header_add_at_position(), and receive_remove_recipient(), and exported them
2525 6. If an ACL "warn" statement specified the addition of headers, Exim already
2526 inserted X-ACL-Warn: at the start if there was no header name. However, it
2527 was not making this test for the second and subsequent header lines if
2528 there were newlines in the string. This meant that an invalid header could
2529 be inserted if Exim was badly configured.
2531 7. Allow an ACL "warn" statement to add header lines at the start or after all
2532 the Received: headers, as well as at the end.
2534 8. Added the rcpt_4xx retry error code.
2536 9. Added postmaster_mailfrom=xxx to callout verification option.
2538 10. Added mailfrom=xxxx to the callout verification option, for verify=
2541 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2542 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2544 12. Inserted some casts to stop certain compilers warning when using pointer
2545 differences as field lengths or precisions in printf-type calls (mostly
2546 affecting debugging statements).
2548 13. Added optional readline() support for -be (dynamically loaded).
2550 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2551 same clock tick as a message's arrival, so that its received time was the
2552 same as the "first fail" time on the retry record, and that message
2553 remained on the queue past the ultimate address timeout, every queue runner
2554 would try a delivery (because it was past the ultimate address timeout) but
2555 after another failure, the ultimate address timeout, which should have then
2556 bounced the address, did not kick in. This was a "< instead of <=" error;
2557 in most cases the first failure would have been in the next clock tick
2558 after the received time, and all would be well.
2560 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2561 being recognized when the domain list was tested by the match_domain
2562 condition in an expansion string.
2564 16. Added the ${str2b64: operator.
2566 17. Exim was always calling setrlimit() to set a large limit for the number of
2567 processes, without checking whether the existing limit was already
2568 adequate. (It did check for the limit on file descriptors.) Furthermore,
2569 errors from getrlimit() and setrlimit() were being ignored. Now they are
2570 logged to the main and panic logs, but Exim does carry on, to try to do its
2571 job under whatever limits there are.
2573 18. Imported PCRE 5.0.
2575 19. Trivial typo in log message " temporarily refused connection" (the leading
2578 20. If the log selector return_path_on_delivery was set and an address was
2579 redirected to /dev/null, the delivery process crashed because it assumed
2580 that a return path would always be set for a "successful" delivery. In this
2581 case, the whole delivery is bypassed as an optimization, and therefore no
2584 21. Internal re-arrangement: the function for sending a challenge and reading
2585 a response while authentication was assuming a zero-terminated challenge
2586 string. It's now changed to take a pointer and a length, to allow for
2587 binary data in such strings.
2589 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2591 23. Exim was not respecting finduser_retries when seeking the login of the
2592 uid under which it was called; it was always trying 10 times. (The default
2593 setting of finduser_retries is zero.) Also, it was sleeping after the final
2594 failure, which is pointless.
2596 24. Implemented tls_on_connect_ports.
2598 25. Implemented acl_smtp_predata.
2600 26. If the domain in control=submission is set empty, Exim assumes that the
2601 authenticated id is a complete email address when it generates From: or
2602 Sender: header lines.
2604 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2605 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2606 chown and chgrp in /bin and hostname in /usr/bin.
2608 28. Exim was keeping the "process log" file open after each use, just as it
2609 does for the main log. This opens the possibility of it remaining open for
2610 long periods when the USR1 signal hits a daemon. Occasional processlog
2611 errors were reported, that could have been caused by this. Anyway, it seems
2612 much more sensible not to leave this file open at all, so that is what now
2615 29. The long-running daemon process does not normally write to the log once it
2616 has entered its main loop, and it closes the log before doing so. This is
2617 so that log files can straightforwardly be renamed and moved. However,
2618 there are a couple of unusual error situations where the daemon does write
2619 log entries, and I had neglected to close the log afterwards.
2621 30. The text of an SMTP error response that was received during a remote
2622 delivery was being truncated at 512 bytes. This is too short for some of
2623 the long messages that one sometimes sees. I've increased the limit to
2626 31. It is now possible to make retry rules that apply only when a message has a
2627 specific sender, in particular, an empty sender.
2629 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2630 it possible to be selective about when SMTP synchronization is enforced.
2632 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2634 32. Implemented hosts_connection_nolog.
2636 33. Added an ACL for QUIT.
2638 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2641 35. Added mailbox_size and mailbox_filecount to appendfile.
2643 36. Added control = no_multiline_responses to ACLs.
2645 37. There was a bug in the logic of the code that waits for the clock to tick
2646 in the case where the clock went backwards by a substantial amount such
2647 that the microsecond fraction of "now" was more than the microsecond
2648 fraction of "then" (but the whole seconds number was less).
2650 38. Added support for the libradius Radius client library this is found on
2651 FreeBSD (previously only the radiusclient library was supported).
2657 1. When certain lookups returned multiple values in the form name=value, the
2658 quoting of the values was not always being done properly. Specifically:
2659 (a) If the value started with a double quote, but contained no whitespace,
2661 (b) If the value contained whitespace other than a space character (i.e.
2662 tabs or newlines or carriage returns) it was not quoted.
2663 This fix has been applied to the mysql and pgsql lookups by writing a
2664 separate quoting function and calling it from the lookup code. The fix
2665 should probably also be applied to nisplus, ibase and oracle lookups, but
2666 since I cannot test any of those, I have not disturbed their existing code.
2668 2. A hit in the callout cache for a specific address caused a log line with no
2669 reason for rejecting RCPT. Now it says "Previous (cached) callout
2670 verification failure".
2672 3. There was an off-by-one bug in the queryprogram router. An over-long
2673 return line was truncated at 256 instead of 255 characters, thereby
2674 overflowing its buffer with the terminating zero. As well as fixing this, I
2675 have increased the buffer size to 1024 (and made a note to document this).
2677 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2678 when Exim is waiting for an SMTP response from a remote server, Exim
2679 restarts its select() call on the socket, thereby resetting its timeout.
2680 This is not a problem when such interrupts are rare. Somebody set up a cron
2681 job to run exiwhat every 2 minutes, which is less than the normal select()
2682 timeout (5 or 10 minutes). This meant that the select() timeout never
2683 kicked in because it was always reset. I have fixed this by comparing the
2684 time when an interrupt arrives with the time at the start of the first call
2685 to select(). If more time than the timeout has elapsed, the interrupt is
2686 treated as a timeout.
2688 5. Some internal re-factoring in preparation for the addition of Sieve
2689 extensions (by MH). In particular, the "personal" test is moved to a
2690 separate function, and given an option for scanning Cc: and Bcc: (which is
2691 not set for Exim filters).
2693 6. When Exim created an email address using the login of the caller as the
2694 local part (e.g. when creating a From: or Sender: header line), it was not
2695 quoting the local part when it contained special characters such as @.
2697 7. Installed new OpenBSD configuration files.
2699 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2700 try to make them clearer.
2702 9. Callout options, other than the timeout value, were being ignored when
2703 verifying sender addresses in header lines. For example, when using
2705 verify = header_sender/callout=no_cache
2707 the cache was (incorrectly) being used.
2709 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2710 only the Cygwin environment.
2712 11. When return_path_on_delivery was set as a log selector, if different remote
2713 addresses in the same message used different return paths and parallel
2714 remote delivery occurred, the wrong values would sometimes be logged.
2715 (Whenever a remote delivery process finished, the return path value from
2716 the most recently started remote delivery process was logged.)
2718 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2719 lines when AUTH and/or TLS are in use. This is the "received protocol"
2720 field. Exim used to use "asmtp" for authenticated SMTP, without any
2721 indication (in the protocol name) for TLS use. Now it follows the RFC and
2722 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2723 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2724 names appear in log lines as well as in Received: header lines.
2726 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2727 extensions, and comparison tests, and to fix some bugs.
2729 14. Changes to the "personal" filter test:
2731 (1) The test was buggy in that it was just doing the equivalent of
2732 "contains" tests on header lines. For example, if a user's address was
2733 anne@some.where, the "personal" test would incorrectly be true for
2735 To: susanne@some.where
2737 This test is now done by extracting each address from the header in turn,
2738 and checking the entire address. Other tests that are part of "personal"
2739 are now done using regular expressions (for example, to check local parts
2740 of addresses in From: header lines).
2742 (2) The list of non-personal local parts in From: addresses has been
2743 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2744 taken from the Sieve specification recommendations.
2746 (3) If the message contains any header line starting with "List-" it is
2747 treated as non-personal.
2749 (4) The test for "circular" in the Subject: header line has been removed
2750 because it now seems ill-conceived.
2752 15. Minor typos in src/EDITME comments corrected.
2754 16. Installed latest exipick from John Jetmore.
2756 17. If headers_add on a router specified a text string that was too long for
2757 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2758 of string_sprintf() is now avoided.
2760 18. $message_body_size was not set (it was always zero) when running the DATA
2761 ACL and the local_scan() function.
2763 19. For the "mail" command in an Exim filter, no default was being set for
2764 the once_repeat time, causing a random time value to be used if "once" was
2765 specified. (If the value happened to be <= 0, no repeat happened.) The
2766 default is now 0s, meaning "never repeat". The "vacation" command was OK
2767 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2768 (I found it when inspecting the code).
2770 20. There is now an overall timeout for performing a callout verification. It
2771 defaults to 4 times the callout timeout, which applies to individual SMTP
2772 commands during the callout. The overall timeout applies when there is more
2773 than one host that can be tried. The timeout is checked before trying the
2774 next host. This prevents very long delays if there are a large number of
2775 hosts and all are timing out (e.g. when the network connections are timing
2776 out). The value of the overall timeout can be changed by specifying an
2777 additional sub-option for "callout", called "maxwait". For example:
2779 verify = sender/callout=5s,maxwait=20s
2781 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2782 to the end before writing, but this should make it even safer).
2784 22. Exim was forgetting that it had advertised PIPELINING for the second and
2785 subsequent messages on an SMTP connection. It was also not resetting its
2786 memory on STARTTLS and an internal HELO.
2788 23. When Exim logs an SMTP synchronization error within a session, it now
2789 records whether PIPELINING has been advertised or not.
2791 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2792 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2793 rather than long int.
2795 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2797 26. Added the never_mail option to autoreply.
2803 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2804 crash if the getsockname() call failed; this can happen if a connection is
2805 closed very soon after it is established. The problem was simply in the
2806 order in which certain operations were done, causing Exim to try to write
2807 to the SMTP stream before it had set up the file descriptor. The bug has
2808 been fixed by making things happen in the correct order.
2814 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2815 before the connection was closed, thus losing the rejection response.
2817 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2818 some early Solaris releases, but causes trouble in current releases where
2819 socklen_t is defined.
2821 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2824 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2827 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2828 that releasing the top of it at the end releases what was used for sub-
2829 expansions (unless the block got too big). However, discard this block if
2830 the first thing is a variable or header, so that we can use its block when
2831 it is dynamic (useful for very large $message_headers, for example).
2833 6. Lookups now cache *every* query, not just the most recent. A new, separate
2834 store pool is used for this. It can be recovered when all lookup caches are
2835 flushed. Lookups now release memory at the end of their result strings.
2836 This has involved some general refactoring of the lookup sources.
2838 7. Some code has been added to the store_xxx() functions to reduce the amount
2839 of flapping under certain conditions.
2841 8. log_incoming_interface used to affect only the <= reception log lines. Now
2842 it causes the local interface and port to be added to several more SMTP log
2843 lines, for example "SMTP connection from", and rejection lines.
2845 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2847 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2849 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2850 could be overwritten at the end of the current message (or the start of a
2851 new message if it was set in a HELO ACL). The value is now preserved for
2852 the duration of the SMTP connection.
2854 12. If a transport had a headers_rewrite setting, and a matching header line
2855 contained an unqualified address, that address was qualified, even if it
2856 did not match any rewriting rules. The underlying bug was that the values
2857 of the flags that permit the existence of unqualified sender and recipient
2858 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2859 non-local messages, and by -bnq for local messages) were not being
2860 preserved with the message after it was received.
2862 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2863 "next input=" as part of the text comprising the host identity instead of
2864 the correct text. The code was using the same buffer for two different
2865 strings. However, depending on which order the printing function evaluated
2866 its arguments, the bug did not always show up. Under Linux, for example, my
2867 test suite worked just fine.
2869 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2870 doesn't work with some older versions of Perl. It has been changed to "my",
2871 which in any case is probably the better facility to use.
2873 15. A really picky compiler found some instances of statements for creating
2874 error messages that either had too many or two few arguments for the format
2877 16. The size of the buffer for calls to the DNS resolver has been increased
2878 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2879 for addresses that have a lot of PTR records. This alleviates a problem; it
2880 does not fully solve it.
2882 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2883 buffer now truncates the list and logs the incident, which is the same
2884 action as happens when Exim is looking up a host name and its aliases.
2885 Previously in this situation something unpredictable would happen;
2886 sometimes it was "internal error: store_reset failed".
2888 18. If a server dropped the connection unexpectedly when an Exim client was
2889 using GnuTLS and trying to read a response, the client delivery process
2890 crashed while trying to generate an error log message.
2892 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2893 string, for example:
2895 warn message = H1: something\nH2: something
2897 the text was added as a single header line from Exim's point of view
2898 though it ended up OK in the delivered message. However, searching for the
2899 second and subsequent header lines using $h_h2: did not work. This has been
2900 fixed. Similarly, if a system filter added multiple headers in this way,
2901 the routers could not see them.
2903 20. Expanded the error message when iplsearch is called with an invalid key to
2904 suggest using net-iplsearch in a host list.
2906 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2907 ACLs are no longer actually imposed (and a message to that effect is
2910 22. If a "gecos" field in a passwd entry contained escaped characters, in
2911 particular, if it contained a \" sequence, Exim got it wrong when building
2912 a From: or a Sender: header from that name. A second bug also caused
2913 incorrect handling when an unquoted " was present following a character
2914 that needed quoting.
2916 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2917 was not being matched caselessly.
2919 24. Arranged for all hyphens in the exim.8 source to be escaped with
2922 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2923 properly. Recipient callout cache records were still being keyed to include
2924 the sender, even when use_sender was set false. This led to far more
2925 callouts that were necessary. The sender is no longer included in the key
2926 when use_sender is false.
2928 26. Added "control = submission" modifier to ACLs.
2930 27. Added the ${base62d: operator to decode base 62 numbers.
2932 28. dnsdb lookups can now access SRV records.
2934 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2935 the configuration file.
2937 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2938 (-v) mode. This makes the output for a verbose queue run more intelligible.
2940 31. Added a use_postmaster feature to recipient callouts.
2942 32. Added the $body_zerocount variable, containing the number of binary zero
2943 bytes in the message body.
2945 33. The time of last modification of the "new" subdirectory is now used as the
2946 "mailbox time last read" when there is a quota error for a maildir
2949 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2951 35. Added +ignore_unknown as a special item in host lists.
2953 36. Code for decoding IPv6 addresses in host lists is now included, even if
2954 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2955 address was recognized as an IP address, but was then not correctly decoded
2956 into binary, causing unexpected and incorrect effects when compared with
2963 1. Very minor rewording of debugging text in manualroute to say "list of
2964 hosts" instead of "hostlist".
2966 2. If verify=header_syntax was set, and a header line with an unqualified
2967 address (no domain) and a large number of spaces between the end of the
2968 name and the colon was received, the reception process suffered a buffer
2969 overflow, and (when I tested it) crashed. This was caused by some obsolete
2970 code that should have been removed. The fix is to remove it!
2972 3. When running in the test harness, delay a bit after writing a bounce
2973 message to get a bit more predictability in the log output.
2975 4. Added a call to search_tidyup() just before forking a reception process. In
2976 theory, someone could use a lookup in the expansion of smtp_accept_max_
2977 per_host which, without the tidyup, could leave open a database connection.
2979 5. Added the variables $recipient_data and $sender_data which get set from a
2980 lookup success in an ACL "recipients" or "senders" condition, or a router
2981 "senders" option, similar to $domain_data and $local_part_data.
2983 6. Moved the writing of debug_print from before to after the "senders" test
2986 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2987 problems for message scanning, either using a data ACL, or using
2988 local_scan() because the Received: header was not generated till after they
2989 were called (in order to set the time as the time of reception completion).
2990 I have revised the way this works. The header is now generated after the
2991 body is received, but before the ACL or local_scan() are called. After they
2992 are run, the timestamp in the header is updated.
2998 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2999 before starting a queue runner without re-exec. This happened only when
3000 deliver_drop_privilege was set or when the Exim user was set to root. The
3001 effect of the bug was that timeouts during subsequent deliveries caused
3002 crashes instead of being properly handled. The handler is now left at its
3003 default (and expected) setting.
3005 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3006 message, again when deliver_drop_privilege is set or Exim is run as root.
3007 The bug described in (1) was not present in this case, but the tidying up
3008 of the other signals was missing. I have made the two cases consistent.
3010 3. The ignore_target_hosts setting on a manualroute router was being ignored
3011 for hosts that were looked up using the /MX notation.
3013 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3016 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3017 operated on the sender address. After changing the $sender_address to <>
3018 for the sender address verify, Exim was re-instated it as the original
3019 (before rewriting) address, but remembering that it had rewritten it, so it
3020 wasn't rewriting it again. This bug also had the effect of breaking the
3021 sender address verification caching when the sender address was rewritten.
3023 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3024 This has been changed so that if the ip literal address matches
3025 ignore_target_hosts, the router declines.
3027 7. Added expansion conditions match_domain, match_address, and match_local_
3028 part (NOT match_host).
3030 8. The placeholder for the Received: header didn't have a length field set.
3032 9. Added code to Exim itself and to exim_lock to test for a specific race
3033 condition that could lead to file corruption when using MBX delivery. The
3034 issue is with the lockfile that is created in /tmp. If this file is removed
3035 after a process has opened it but before that process has acquired a lock,
3036 there is the potential for a second process to recreate the file and also
3037 acquire a lock. This could lead to two Exim processes writing to the file
3038 at the same time. The added code performs the same test as UW imapd; it
3039 checks after acquiring the lock that its file descriptor still refers to
3040 the same named file.
3042 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3043 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3046 11. Added the smtp_active_hostname option. If used, this will typically be made
3047 to depend on the incoming interface address. Because $interface_address is
3048 not set up until the daemon has forked a reception process, error responses
3049 that can happen earlier (such as "too many connections") no longer contain
3052 12. If an expansion in a condition on a "warn" statement fails because a lookup
3053 defers, the "warn" statement is abandoned, and the next ACL statement is
3054 processed. Previously this caused the whole ACL to be aborted.
3056 13. Added the iplsearch lookup type.
3058 14. Added ident_timeout as a log selector.
3060 15. Added tls_certificate_verified as a log selector.
3062 16. Added a global option tls_require_ciphers (compare the smtp transport
3063 option of the same name). This controls incoming TLS connections.
3065 17. I finally figured out how to make tls_require_ciphers do a similar thing
3066 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3067 before starting the TLS session.
3069 18. Tabs are now shown as \t in -bP output.
3071 19. If the log selector return_path_on_delivery was set, Exim crashed when
3072 bouncing a message because it had too many Received: header lines.
3074 20. If two routers both had headers_remove settings, and the first one included
3075 a superfluous trailing colon, the final name in the first list and the
3076 first name in the second list were incorrectly joined into one item (with a
3077 colon in the middle).
3083 1. Added -C and -D options to the exinext utility, mainly to make it easier
3084 to include in the automated testing, but these could be helpful when
3085 multiple configurations are in use.
3087 2. The exinext utility was not formatting the output nicely when there was
3088 an alternate port involved in the retry record key, nor when there was a
3089 message id as well (for retries that were specific to a specific message
3090 and a specific host). It was also confused by IPv6 addresses, because of
3091 the additional colons they contain. I have fixed the IPv4 problem, and
3092 patched it up to do a reasonable job for IPv6.
3094 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3095 delivery, the log line now contains "pipelined" if PIPELINING was used.
3097 4. An SMTP transport process used to panic and die if the bind() call to set
3098 an explicit outgoing interface failed. This has been changed; it is now
3099 treated in the same way as a connect() failure.
3101 5. A reference to $sender_host_name in the part of a conditional expansion
3102 that was being skipped was still causing a DNS lookup. This no longer
3105 6. The def: expansion condition was not recognizing references to header lines
3106 that used bh_ and bheader_.
3108 7. Added the _cache feature to named lists.
3110 8. The code for checking quota_filecount in the appendfile transport was
3111 allowing one more file than it should have been.
3113 9. For compatibility with Sendmail, the command line option
3121 and sets the incoming protocol and host name (for trusted callers). The
3122 host name and its colon can be omitted when only the protocol is to be set.
3123 Note the Exim already has two private options, -pd and -ps, that refer to
3124 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3125 "s", but I don't think that's a major issue.
3127 10. A number of refactoring changes to the code, none of which should affect
3130 (a) The number of logging options was getting close to filling up the
3131 32-bit word that was used as a bit map. I have split them into two classes:
3132 those that are passed in the argument to log_write(), and those that are
3133 only ever tested independently outside of that function. These are now in
3134 separate 32-bit words, so there is plenty of room for expansion again.
3135 There is no change in the user interface or the logging behaviour.
3137 (b) When building, for example, log lines, the code previously used a
3138 macro that called string_cat() twice, in order to add two strings. This is
3139 not really sufficiently general. Furthermore, there was one instance where
3140 it was actually wrong because one of the argument was used twice, and in
3141 one call a function was used. (As it happened, calling the function twice
3142 did not affect the overall behaviour.) The macro has been replaced by a
3143 function that can join an arbitrary number of extra strings onto a growing
3146 (c) The code for expansion conditions now uses a table and a binary chop
3147 instead of a serial search (which was left over from when there were very
3148 few conditions). Also, it now recognizes conditions like "pam" even when
3149 the relevant support is not compiled in: a suitably worded error message is
3150 given if an attempt is made to use such a condition.
3152 11. Added ${time_interval:xxxxx}.
3154 12. A bug was causing one of the ddress fields not to be passed back correctly
3155 from remote delivery subprocesses. The field in question was not being
3156 subsequently used, so this caused to problems in practice.
3158 13. Added new log selectors queue_time and deliver_time.
3160 14. Might have fixed a bug in maildirsizefile handling that threw up
3161 "unexpected character" debug warnings, and recalculated the data
3162 unnecessarily. In any case, I expanded the warning message to give more
3165 15. Added the message "Restricted characters in address" to the statements in
3166 the default ACL that block characters like @ and % in local parts.
3168 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3169 Three changes have been made:
3171 (a) There was a serious bug; a negative response to MAIL caused the whole
3172 recipient domain to be cached as invalid, thereby blocking all messages
3173 to all local parts at the same domain, from all senders. This bug has
3174 been fixed. The domain is no longer cached after a negative response to
3175 MAIL if the sender used is not empty.
3177 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3180 (c) A new callout option, "use_sender" has been added for people who want
3181 the modified behaviour.
3187 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3190 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3191 indeed breaks things for older releases.
3193 3. Added additional logging to the case where there is a problem reading data
3194 from a filter that is running in a subprocess using a pipe, in order to
3195 try to track down a specific problem.
3197 4. Testing facility fudge: when running in the test harness and attempting
3198 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3199 getting "No route to host". Convert this to a timeout.
3201 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3204 6. Some OS don't have socklen_t but use size_t instead. This affects the
3205 fifth argument of getsockopt() amongst other things. This is now
3206 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3207 can be set for individual OS. I have set it for SunOS5, OSF1, and
3208 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3209 some earlier ones do not.
3211 7. Change 4.30/15 was not doing the test caselessly.
3213 8. The standard form for an IPv6 address literal was being rejected by address
3214 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3215 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3216 this, as well as the form without the "IPv6" on the front (but only when
3217 address literals are enabled, of course).
3219 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3221 10. Exim crashed if a message with an empty sender address specified by -f
3222 encountered a router with an errors_to setting. This could be provoked only
3223 by a command such as
3227 where an empty string was supplied; "<>" did not hit this bug.
3229 11. Installed PCRE release 4.5.
3231 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3232 remained set. It is now erased.
3234 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3235 times from message ids (which are base 36 rather than the normal 62).
3237 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3238 were being counted as actual protocol errors, and logged if the log
3239 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3240 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3241 and DATA following a set of rejected RCPTs do not count as protocol errors.
3242 In other words, Exim assumes they were pipelined, though this may not
3243 actually be the case. Of course, in all cases the client gets an
3244 appropriate error code.
3246 15. If a lookup fails in an ACL condition, a message about the failure may
3247 be available; it is used if testing the ACL cannot continue, because most
3248 such messages specify what the cause of the deferral is. However, some
3249 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3250 that caused an old message to be retained and used if a later statement
3251 caused a defer, replacing the real cause of the deferral.
3253 16. If an IP address had so many PTR records that the DNS lookup buffer
3254 was not large enough to hold them, Exim could crash while trying to process
3255 the truncated data. It now detects and logs this case.
3257 17. Further to 4.21/58, another change has been made: if (and only if) the
3258 first line of a message (the first header line) ends with CRLF, a bare LF
3259 in a subsequent header line has a space inserted after it, so as not to
3260 terminate the header.
3262 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3263 unnecessarily, used atoi() instead of strtol(), and didn't check the
3264 termination when getting file sizes from file names by regex.
3266 19. Completely re-implemented the support for maildirsize files, in the light
3267 of a number of problems with the previous contributed implementation
3268 (4.30/29). In particular:
3270 . If the quota is zero, the maildirsize file is maintained, but no quota is
3273 . If the maildir directory does not exist, it is created before any attempt
3274 to write a maildirsize file.
3276 . The quota value in the file is just a cache; if the quota is changed in
3277 the transport, the new value overrides.
3279 . A regular expression is available for excluding directories from the
3282 20. The autoreply transport checks the characters in options that define the
3283 message's headers; it allows continued headers, but it was checking with
3284 isspace() after an embedded newline instead of explicitly looking for a
3287 21. If all the "regular" hosts to which an address was routed had passed their
3288 expiry times, and had not reached their retry times, the address was
3289 bounced, even if fallback hosts were defined. Now Exim should go on to try
3292 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3293 equivalent code in the SMTP transport. Some hosts send humungous responses
3294 to HELO/EHLO, more than 1024 it seems.
3296 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3297 gives compiler warnings in some environments. I've now done it "properly",
3300 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3301 (because of problems with the built-in one) was declared to return uschar *
3302 instead of char *, causing compiler failure.
3304 25. Fixed a file descriptor leak when processing alias/forward files.
3306 26. Fixed a minor format string issue in dbfn.c.
3308 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3310 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3311 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3314 29. When a sender address is verified, it is cached, to save repeating the test
3315 when there is more than one recipient in a message. However, when the
3316 verification involves a callout, it is possible for different callout
3317 options to be set for different recipients. It is too complicated to keep
3318 track of this in the cache, so now Exim always runs a verification when a
3319 callout is required, relying on the callout cache for the optimization.
3320 The overhead is duplication of the address routing, but this should not be
3323 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3324 to be verified with callout=postmaster, and the main callout worked but the
3325 postmaster check failed, the verification correctly failed. However, if a
3326 subsequent RCPT command asked for sender verification *without* the
3327 postmaster check, incorrect caching caused this verification also to fail,
3330 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3331 it was not caching the DNS options (qualify_single, search_parents) that
3332 were used when the lookup failed. A subsequent lookup with different
3333 options therefore always gave the same answer, though there were cases
3334 where it should not have. (Example: a "domains = !$mx_any" option on a
3335 dnslookup router: the "domains" option is always processed without any
3336 widening, but the router might have qualify_single set.) Now Exim uses the
3337 cached value only when the same options are set.
3339 32. Added John Jetmore's "exipick" utility to the distribution.
3341 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3342 than a timeout (e.g. a certificate is required, and is not provided), an
3343 Exim server now closes the connection immediately. Previously it waited for
3344 the client to close - but if the client is SSL, it seems that they each
3345 wait for each other, leading to a delay before one of them times out.
3347 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3348 maintained 0.8.x compatibility because I don't think many are using it, and
3349 it is clearly obsolete.
3351 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3354 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3355 client certificate was expired. A simple patch fixes this, though I don't
3356 understand the full logic of why the verify callback is called multiple
3359 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3360 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3361 which causes problems with some clients (such as the Certicom SSL Plus
3362 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3363 disables the coutermeasure allowing Eudora to connect."
3365 38. Exim was not checking that a write() to a log file succeeded. This could
3366 lead to Bad Things if a log got too big, in particular if it hit a file
3367 size limit. Exim now panics and dies if it cannot write to a log file, just
3368 as it does if it cannot open a log file.
3370 39. Modified OS/Makefile-Linux so that it now contains
3372 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3374 The two -D definitions ensure that Exim is compiled with large file
3375 support, which makes it possible to handle log files that are bigger than
3378 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3379 instance) a domain was checked against a named list that involved a lookup,
3380 causing $domain_data to be set, then another domain was checked against the
3381 same list, then the first domain was re-checked, the value of $domain_data
3382 after the final check could be wrong. In particular, if the second check
3383 failed, it could be set empty. This bug probably also applied to
3386 41. The strip_trailing_dot option was not being applied to the address given
3387 with the -f command-line option.
3389 42. The code for reading a message's header from the spool was incrementing
3390 $received_count, but never initializing it. This meant that the value was
3391 incorrect (doubled) while delivering a message in the same process in which
3392 it was received. In the most common configuration of Exim, this never
3393 happens - a fresh exec is done - but it can happen when
3394 deliver_drop_privilege is set.
3396 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3397 it now includes up to 150 characters of the unexpected data in the log
3400 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3401 and building data strings. The size of both of these buffers was 10 000
3402 bytes - far larger than anybody would *ever* want, thought I. Needless to
3403 say, somebody hit the limit. I have increased the maximum line length to
3404 20 000 and the maximum data length of concatenated lines to 100 000. I have
3405 also fixed two bugs, because there was no checking on these buffers. Tsk,
3406 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3407 buffer is too small.
3409 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3410 lsearch lookups. Now it does.
3412 46. When parsing a route_list item in a manualroute router, a fixed-length
3413 buffer was used for the list of hosts. I made this 1024 bytes long,
3414 thinking that nobody would ever have a list of hosts that long. Wrong.
3415 Somebody had a whole pile of complicated expansion conditions, and the
3416 string was silently truncated, leading to an expansion error. It turns out
3417 that it is easier to change to an unlimited length (owing to other changes
3418 that have happened since this code was originally written) than to build
3419 structure for giving a limitation error. The length of the item that
3420 expands into the list of hosts is now unlimited.
3422 47. The lsearch lookup could not handle data where the length of text line was
3423 more than 4095 characters. Such lines were truncated, leading to shortened
3424 data being returned. It should now handle lines of any length.
3426 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3427 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3430 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3431 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3432 no longer happens in comment lines. A list of replacements is now placed
3433 at the head of all of the source files, except those whose only change is
3434 to replace PERL_COMMAND in the very first #! line.
3436 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3437 messages on the queue, with a bottom-up merge sort, using code contributed
3438 by Michael Haardt. This should make operations like -bp somewhat faster on
3439 large queues. It won't affect queue runners, except when queue_run_in_order
3442 51. Installed eximstats 1.31 in the distribution.
3444 52. Added support for SRV lookups to the dnslookup router.
3446 53. If an ACL referred to $message_body or $message_body_end, the value was not
3447 reset for any messages that followed in the same SMTP session.
3449 54. The store-handling optimization for building very long strings was not
3450 differentiating between the different store pools. I don't think this
3451 actually made any difference in practice, but I've tidied it.
3453 55. While running the routers to verify a sender address, $sender_address
3454 was still set to the sender address. This is wrong, because when routing to
3455 send a bounce to the sender, it would be empty. Therefore, I have changed
3456 it so that, while verifying a sender address, $sender_address is set to <>.
3457 (There is no change to what happens when verifying a recipient address.)
3459 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3460 target A or AAAA records (if not already returned) without resetting the
3461 qualify_single or search_parents options of the DNS resolver. These are
3462 inappropriate in this case because the targets of MX and SRV records must
3463 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3464 target that, when qualified, matched something in the local domain. These
3465 two options are now turned off when doing these lookups.
3467 57. It seems that at least some releases of Reiserfs (which does not have the
3468 concept of a fixed number of inodes) returns zero and not -1 for the
3469 number of available inodes. This interacted badly with check_spool_inodes,
3470 which assumed that -1 was the "no such thing" setting. What I have done is
3471 to check that the total number of inodes is greater than zero before doing
3472 the test of how many are available.
3474 58. When a "warn" ACL statement has a log_message modifier, the message is
3475 remembered, and not repeated. This is to avoid a lot of repetition when a
3476 message has many recipients that cause the same warning to be written.
3477 Howewer, Exim was preserving the list of already written lines for an
3478 entire SMTP session, which doesn't seem right. The memory is now reset if a
3479 new message is started.
3481 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3482 debugging output unless log_rewrite was also set.
3484 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3485 of (int)(handle) when we know that handle contains (void *)(-1).
3487 61. The Exim daemon panic-logs an error return when it closes the incoming
3488 connection. However "connection reset by peer" seems to be common, and
3489 isn't really an error worthy of noting specially, so that particular error
3492 62. When Exim is trying to find all the local interfaces, it used to panic and
3493 die if the ioctl to get the interface flags failed. However, it seems that
3494 on at least one OS (Solaris 9) it is possible to have an interface that is
3495 included in the list of interfaces, but for which you get a failure error
3496 for this call. This happens when the interface is not "plumbed" into a
3497 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3498 failure of the "get flags" call assumes that the interface is down.
3500 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3501 makes life easier for people who are doing arithmetic on fields extracted
3502 from dates, where you often get leading zeros that should not be
3503 interpreted as octal.
3505 64. Added qualify_domain to the redirect router, to override the global
3508 65. If a pathologically long header line contained very many addresses (the
3509 report of this problem mentioned 10 000) and each of them was rewritten,
3510 Exim could use up a very large amount of memory. (It kept on making new
3511 copies of the header line as it rewrote, and never released the old ones.)
3512 At the expense of a bit more processing, the header rewriting function has
3513 been changed so that it no longer eats memory in this way.
3515 66. The generation of the Received: header has been moved from the time that a
3516 message starts to be received, to the time that it finishes. The timestamp
3517 in the Received: header should now be very close to that of the <= log
3518 line. There are two side-effects of this change:
3520 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3521 logged header lines no longer include the local Received: line, because
3522 it has not yet been created. The same applies to a copy of the message
3523 that is returned to a non-SMTP sender when a message is rejected.
3525 (b) When a filter file is tested using -bf, no additional Received: header
3526 is added to the test message. After some thought, I decided that this
3529 This change does not affect the value of $received_for. It is still set
3530 after address rewriting, but before local_scan() is called.
3532 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3534 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3535 gave an unhelpful panic error message, and a defer error. I have managed to
3536 change this behaviour so that it now rejects any supplied certificate,
3537 which seems right, as the list of acceptable certificates is empty.
3539 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3540 gave an unhelpful defer error. I have not managed to make this reject any
3541 supplied certificates, but the error message it gives is "no certificate
3542 supplied", which is not helpful.
3544 70. exigrep's output now also includes lines that are not associated with any
3545 message, but which match the given pattern. Implemented by a patch from
3546 Martin Sluka, which also tidied up the Perl a bit.
3548 71. Recipient callout verification, like sender verification, was using <> in
3549 the MAIL FROM command. This isn't really the right thing, since the actual
3550 sender may affect whether the remote host accepts the recipient or not. I
3551 have changed it to use the actual sender in the callout; this means that
3552 the cache record is now keyed on a recipient/sender pair, not just the
3553 recipient address. There doesn't seem to be a real danger of callout loops,
3554 since a callout by the remote host to check the sender would use <>.
3555 [SEE ABOVE: changed after hitting problems.]
3557 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3558 temporary errors. However, in the case of such a code being given after
3559 the end of a data transmission (i.e. after ".") Exim was failing to write
3560 a retry record for the message. (Yes, there was some broken host that was
3561 actually sending 8xx at this point.)
3563 73. An unknown lookup type in a host list could cause Exim to panic-die when
3564 the list was checked. (An example that provoked this was putting <; in the
3565 middle of a list instead of at the start.) If this happened during a DATA
3566 ACL check, a -D file could be left lying around. This kind of configuration
3567 error no longer causes Exim to die; instead it causes a defer errror. The
3568 incident is still logged to the main and panic logs.
3570 74. Buglet left over from Exim 3 conversion. The message "too many messages
3571 in one connection" was written to the rejectlog but not the mainlog, except
3572 when address rewriting (yes!) was being logged.
3574 75. Added write_rejectlog option.
3576 76. When a system filter was run not as root (that is, when system_filter_user
3577 was set), the values of the $n variables were not being returned to the
3578 main process; thus, they were not subsequently available in the $sn
3581 77. Added +return_path_on_delivery log selector.
3583 78. A connection timeout was being treated differently from recipients deferred
3584 when testing hosts_max_try with a message that was older than the host's
3585 retry timeout. (The host should not be counted, thus allowing all hosts to
3586 be tried at least once before bouncing.) This may have been the cause of an
3587 occasionally reported bug whereby a message would remain on the queue
3588 longer than the retry timeout, but would be bounced if a delivery was
3589 forced. I say "may" because I never totally pinned down the problem;
3590 setting up timeout/retry tests is difficult. See also the next item.
3592 79. The ultimate address timeout was not being applied to errors that involved
3593 a combination of host plus message (for example, a timeout on a MAIL
3594 command). When an address resolved to a number of possible hosts, and they
3595 were not all tried for each delivery (e.g. because of hosts_max_try), a
3596 message could remain on the queue longer than the retry timeout.
3598 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3601 81. Fixed an obscure SMTP outgoing bug which required at least the following
3602 conditions: (a) there was another message waiting for the same server;
3603 (b) the server returned 5xx to all RCPT commands in the first message so
3604 that the message was not completed; (c) the server dropped the connection
3605 or gave a negative response to the RSET that Exim sends to abort the
3606 transaction. The observed case was a dropped connection after DATA that had
3607 been sent in pipelining mode. That is, the server had advertised PIPELINING
3608 but was not implementing it correctly. The effect of the bug was incorrect
3609 behaviour, such as trying another host, and this could lead to a crash.
3615 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3616 and daemon.c were passed as pointers to ints; they should have been
3617 pointers to socklen_t variables (which are typically unsigned ints).
3619 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3622 3. Fixed a really odd bug that affected only the testing scheme; patching a
3623 certain fixed string in the binary changed the value of another string that
3624 happened to be identical to the end of the original first string.
3626 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3627 name", it returns that address as the IP address. On some operating
3628 systems (e.g. Solaris), it also passes back the IP address string as the
3629 "host name". However, on others (e.g. Linux), it passes back an empty
3630 string. Exim wasn't checking for this, and was changing the host name to an
3631 empty string, assuming it had been canonicized.
3633 5. Although rare, it is permitted to have more than one PTR record for a given
3634 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3635 all the names associated with an address, because they do in Solaris.
3636 However, it seems that they do not in Linux for data that comes from the
3637 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3638 I found this out when I moved to a new Linux workstation and tried to run
3639 the Exim test suite.
3641 To get round this problem I have changed the code so that it now does its
3642 own call to the DNS to look up PTR records when searching for a host name.
3643 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3644 addresses that are only in /etc/hosts are still found.
3646 This behaviour is, however, controlled by an option called host_lookup_
3647 order, which defaults to "bydns:byaddr". If people want to use the other
3648 order, or indeed, just use one or the other means of lookup, they can
3649 specify it in this variable.
3651 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3652 some operating systems, this comes back from gethostbyaddr() as an empty
3653 string, and this is what Exim used to test for. However, it seems that in
3654 other systems, "." is yielded. Exim now tests for this case too.
3656 7. The values of check_spool_space and check_log_space are now held internally
3657 as a number of kilobytes instead of an absolute number of bytes. If a
3658 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3659 kilobyte. This means that much larger values can be stored.
3661 8. Exim monitor: an attempt to get the action menu when not actually pointing
3662 at a message produces an empty menu entitled "No message selected". This
3663 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3664 no entries in it ("Shell widget menu has zero width and/or height"). So I
3665 have added a single, blank menu entry in this case.
3667 9. Added ${quote_local_part.
3669 10. MIME decoding is now applied to the contents of Subject: header lines when
3672 11. Now that a reference to $sender_host_address automatically causes a reverse
3673 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3674 host lookup before query-style lookups in lists that might use this
3675 variable. This has therefore been abolished, and the "net-" prefix is no
3676 longer necessary for query-style lookups.
3678 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3679 have been a typo for LFLAGS, so it has been changed.
3681 13. The install script calls Exim with "-C /dev/null" in order to find the
3682 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3683 to be output. Howeve, since Exim outputs its version number before the
3684 error, it didn't break the script. It just looked ugly. I fixed this by
3685 always allowing "-C /dev/null" if the caller is root.
3687 14. Ignore overlarge ACL variable number when reading spool file - insurance
3688 against a later release with more variables having written the file.
3690 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3691 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3692 this, as well as the form without the "IPv6" on the front.
3694 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3695 OS/Makefile-Darwin file.
3697 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3698 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3700 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3701 variable. However, some OS use ints for inodes. I've added cast to long int
3702 to get rid of the compiler warning.
3704 19. I had forgotten to lock out "/../" in configuration file names when
3705 ALT_CONFIG_PREFIX was set.
3707 20. Routers used for verification do not need to specify transports. However,
3708 if such a router generated a host list, and callout was configured, Exim
3709 crashed, because it could not find a port number from the (non-existent)
3710 transport. It now assumes port 25 in this circumstance.
3712 21. Added the -t option to exigrep.
3714 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3715 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3716 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3717 them is set, LOOKUP_LSEARCH is forced.
3719 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3721 24. Added sender and host information to the "rejected by local_scan()" log
3722 line; previously there was no indication of these.
3724 25. Added .include_if_exists.
3726 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3727 Linux. It turns out that not all file systems support this. Apparently some
3728 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3729 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3730 not supported on the file descriptor, is now ignored when Exim is trying to
3731 sync a directory. This applies only to Linux.
3733 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3735 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3736 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3739 29. Added support for maildirsize files from supplied patch (modified a bit).
3741 30. The use of :fail: followed by an empty string could lead Exim to respond to
3742 sender verification failures with (e.g.):
3744 550 Verification failed for <xxx>
3745 550 Sender verify failed
3747 where the first response line was missing the '-' that indicates it is not
3748 the final line of the response.
3750 31. The loop for finding the name of the user that called Exim had a hardwired
3751 limit of 10; it now uses the value of finduser_retries, which is used for
3752 all other user lookups.
3754 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3757 33. Exim was neglecting to zero errno before one call of strtol() when
3758 expanding a string and expecting an integer value. On some systems this
3759 resulted in spurious "integer overflow" errors. Also, it was casting the
3760 result into an int without checking.
3762 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3763 did not work. The code looks as if it has *never* worked, though it appears
3764 to have been documented since at least releast 1.62. I have made it work.
3766 35. The "timeout_DNS" error in retry rules, also documented since at least
3767 1.62, also never worked. As it isn't clear exactly what this means, and
3768 clearly it isn't a major issue, I have abolished the feature by treating it
3769 as "timeout", and writing a warning to the main and panic logs.
3771 36. The display of retry rules for -brt wasn't always showing the error code
3774 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3775 timeout_connect_A, timeout_connect_MX.
3777 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3778 to the empty sender.
3780 39. The daemon was not analysing the content of -oX till after it had closed
3781 stderr and disconnected from the controlling terminal. This meant that any
3782 syntax errors were only noted on the panic log, and the return code from
3783 the command was 0. By re-arranging the code a little, I've made the
3784 decoding happen first, so such errors now appear on stderr, and the return
3785 code is 1. However, the actual setting up of the sockets still happens in
3786 the disconnected process, so errors there are still only recorded on the
3789 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3790 connections (as happens on some IP stacks) was logged at start up time as
3791 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3792 it from "IPv6 and IPv4", which means that two separate sockets are being
3795 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3796 says whether AF_INET or AF_INET6 was passed as an argument.
3798 42. Exiwhat output was messed up when time zones were included in log
3801 43. Exiwhat now gives more information about the daemon's listening ports,
3802 and whether -tls-on-connect was used.
3804 44. The "port" option of the smtp transport is now expanded.
3806 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3807 silently ignored. Now an error message is written to the main and panic
3810 46. There's a new ACL modifier called "logwrite" which writes to a log file
3811 as soon as it is encountered.
3813 47. Added $local_user_uid and $local_user_gid at routing time.
3815 48. Exim crashed when trying to verify a sender address that was being
3818 49. Exim was recognizing only a space character after ".include". It now also
3819 recognizes a tab character.
3821 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3822 extracting the relevant information from the specification. The man page no
3823 longer contains scrambled data for the -d option, and I've added a section
3824 at the front about calling Exim under different names.
3826 51. Added "extra_headers" argument to the "mail" command in filter files.
3828 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3831 53. Installed eximstats 1.29.
3833 54. Added transport_filter_timeout as a generic transport option.
3835 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3836 Cc: header lines. This was required by RFC 822, but it not required by RFC
3839 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3840 incoming messages that did not have them. Now it does so only if the
3841 message originates locally, that is, if there is no associated remote host
3842 address. When Resent- header lines are present, this applies to the Resent-
3843 lines rather than the non-Resent- lines.
3845 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3846 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3848 58. Messages for configuration errors now include the name of the main
3849 configuration file - useful now that there may be more than one file in a
3850 list (.included file names were always shown).
3852 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3853 for those rare installations that do not start the daemon as root or run it
3854 setuid root. I've cut out the call to initgroups() if the daemon is not
3857 60. The Exim user and group can now be bound into the binary as text strings
3858 that are looked up at the start of Exim's processing.
3860 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3862 62. Added $mailstore_basename variable.
3864 63. Installed patch to sieve.c from Michael Haardt.
3866 64. When Exim failed to open the panic log after failing to open the main log,
3867 the original message it was trying to log was written to stderr and debug
3868 output, but if they were not available (the usual case in production), it
3869 was lost. Now it is written to syslog before the two lines that record the
3870 failures to open the logs.
3872 65. Users' Exim filters run in subprocesses under the user's uid. It is
3873 possible for a "deliver" command or an alias in a "personal" command to
3874 provoke an address rewrite. If logging of address rewriting is configured,
3875 this fails because the process is not running as root or exim. There may be
3876 a better way of dealing with this, but for the moment (because 4.30 needs
3877 to be released), I have disabled address rewrite logging when running a
3878 filter in a non-root, non-exim process.
3884 1. The buildconfig auxiliary program wasn't quoting the value set for
3885 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3886 not defined. This bug was masked in 4.22 by the effect that was fixed in
3889 2. Some messages that were rejected after a message id was allocated were
3890 shown as "incomplete" by exigrep. It no longer does this for messages that
3891 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3893 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3894 have allow_domain_literals set, the ID did not get logged in the <= line.
3895 Domain literals are now always recognized in Message-ID: header lines.
3897 4. The first argument for a ${extract expansion item is the key name or field
3898 number. Leading and trailing spaces in this item were not being ignored,
3899 causing some misleading effects.
3901 5. When deliver_drop_privilege was set, single queue runner processes started
3902 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3903 same command in the process it spins off) were not dropping privilege.
3905 6. When the daemon running as "exim" started a queue runner, it always
3906 re-executed Exim in the spun-off process. This is a waste of effort when
3907 deliver_drop_privilege is set. The new process now just calls the
3908 queue-runner function directly.
3914 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3917 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3918 ignored. Though the use of -oP was forcing the writing of a pid file, it
3919 was always written to the default place.
3921 3. If the message "no IP address found for host xxxx" is generated during
3922 incoming verification, it is now followed by identification of the incoming
3923 connection (so you can more easily find what provoked it).
3925 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3927 5. Added some features to "harden" Exim a bit more against certain attacks:
3929 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3930 be put in Local/Makefile. This is like the never_users runtime option,
3931 but it cannot be overridden. The default setting is "root".
3933 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3934 prefix string with which any file named in a -C command line option
3937 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3938 is retained for -C and -D only if the caller of Exim is root. Without
3939 it, the exim user may also use -C and -D and retain privilege.
3941 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3942 command line option is disabled.
3944 6. Macro names set by the -D option must start with an upper case letter, just
3945 like macro names defined in the configuration file.
3947 7. Added "dereference=" facility to LDAP.
3949 8. Two instances of the typo "uknown" in the source files are fixed.
3951 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3952 the Configure-Makefile script screwed up while processing it.
3954 10. Incorporated PCRE 4.4.
3956 11. The SMTP synchronization check was not operating right at the start of an
3957 SMTP session. For example, it could not catch a HELO sent before the client
3958 waited for the greeting. There is now a check for outstanding input at the
3959 point when the greeting is written. Because of the duplex, asynchronous
3960 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3961 way, but not yet received, when the check is performed.
3963 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3964 on TCP/IP sockets, because this apparently causes some broken clients to
3967 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3968 unchanged) from the Cygwin maintainer.
3970 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3971 was supported instead of testing for mbx. Effectively a typo.
3973 15. The spa authenticator server code was not checking that the input it
3974 received was valid base64.
3976 16. The debug output line for the "set" modifier in ACLs was not showing the
3977 name of the variable that was being set.
3979 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3981 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3982 lookup on its own. Something else was needed to trigger the lookup. For
3983 example, a match in host_lookup or the need for a host name in a host list.
3984 Now, if $sender_host_name is referenced and the host name has not yet been
3985 looked up, a lookup is performed. If the lookup fails, the variable remains
3986 empty, and $host_lookup_failed is set to "1".
3988 19. Added "eqi" as a case-independent comparison operator.
3990 20. The saslauthd authentication condition could segfault if neither service
3991 nor realm was specified.
3993 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3994 error message that was logged was misleading, and incoming SMTP
3995 connections were dropped. The message is now more accurate, and temporary
3996 errors are given to SMTP connections.
3998 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3999 (except RSET) with a 421 error, until QUIT is received. However, it was
4000 failing to send a response to QUIT.
4002 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4003 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4004 ACL is now run after the helo_try_verify_hosts code.
4006 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4007 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4008 case-independent, so other case variants are also recognized). Apparently
4009 some systems use these upper case variants.
4011 25. If more than two messages were waiting for the same host, and a transport
4012 filter was specified for the transport, Exim sent two messages over the
4013 same TCP/IP connection, and then failed with "socket operation on non-
4014 socket" when it tried to send the third.
4016 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4018 27. The extern definition of crypt16() in expand.c was not being excluded when
4019 the OS had its own crypt16() function.
4021 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4022 as a preferred synonym for return_size_limit, both as an option and as an
4025 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4027 30. Changed the default configuration ACL to relax the local part checking rule
4028 for addresses that are not in any local domains. For these addresses,
4029 slashes and pipe symbols are allowed within local parts, but the sequence
4030 /../ is explicitly forbidden.
4032 31. SPA server authentication was not clearing the challenge buffer before
4035 32. log_message in a "warn" ACL statement was writing to the reject log as
4036 well as to the main log, which contradicts the documentation and doesn't
4037 seem right (because no rejection is happening). So I have stopped it.
4039 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4040 However, I am unable to do any testing of this.
4042 34. Fixed an infelicity in the appendfile transport. When checking directories
4043 for a mailbox, to see if any needed to be created, it was accidentally
4044 using path names with one or more superfluous leading slashes; tracing
4045 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4047 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4048 contents are added to the log line that is written for every discarded
4049 recipient. (Previously a log_message setting was ignored.)
4051 36. The ${quote: operator now quotes the string if it is empty.
4053 37. The install script runs exim in order to find its version number. If for
4054 some reason other than non-existence or emptiness, which it checks, it
4055 could not run './exim', it was installing it with an empty version number,
4056 i.e. as "exim-". This error state is now caught, and the installation is
4059 38. An argument was missing from the function that creates an error message
4060 when Exim fails to connect to the socket for saslauthd authentication.
4061 This could cause Exim to crash, or give a corrupted message.
4063 39. Added isip, isip4, and isip6 to ${if conditions.
4065 40. The ACL variables $acl_xx are now saved with the message, and can be
4066 accessed later in routers, transports, and filters.
4068 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4069 strings in the file are not string-expanded.
4071 42. If a MAIL command specified a SIZE value that was too large to fit into an
4072 int variable, the check against message_size_limit failed. Such values are
4073 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4074 day this will have to be increased, but I don't think I want to be around
4075 when emails are that large.
4082 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4083 iconv() is not standard in FreeBSD.
4085 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4086 IPv6 enabled. The observed symptom was a segmentation fault on return from
4087 the function os_common_find_running_interfaces() in src/os.c.
4089 3. In the check_special_case() function in daemon.c I had used "errno" as an
4090 argument name, which causes warnings on some systems. This was basically a
4091 typo, since it was named "eno" in the comments!
4093 4. The code that waits for the clock to tick (at a resolution of some fraction
4094 of a second) so as to ensure message-id uniqueness was always waiting for
4095 at least one whole tick, when it could have waited for less. [This is
4096 almost certainly not relevant at current processor speeds, where it is
4097 unlikely to ever wait at all. But we try to future-proof.]
4099 5. The function that sleeps for a time interval that includes fractions of a
4100 second contained a race. It did not block SIGALRM between setting the
4101 timer, and suspending (a couple of lines later). If the interval was short
4102 and the sigsuspend() was delayed until after it had expired, the suspension
4103 never ended. On busy systems this could lead to processes getting stuck for
4106 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4107 process, before it forks any delivery processes. The open lookup caching
4108 mechanism meant that the open file or database connection was passed into
4109 the delivery process. The problem was that delivery processes always tidy
4110 up cached lookup data. This could cause a problem for the next delivery
4111 process started by the queue runner, because the external queue runner
4112 process does not know about the closure. So the next delivery process
4113 still has data in the lookup cache. In the case of a file lookup, there was
4114 no problem because closing a file descriptor in a subprocess doesn't affect
4115 the parent. However, if the lookup was caching a connection to a database,
4116 the connection was closed, and the second delivery process was likely to
4117 see errors such as "PGSQL: query failed: server closed the connection
4118 unexpectedly". The problem has been fixed by closing all cached lookups
4119 in a queue runner before running a delivery process.
4121 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4122 seem to have the "const" qualifier which it has on other OS. I've
4125 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4126 *of the same type* (client or server) with the same public name that an
4127 error should be diagnosed.
4129 9. When Exim looked up a host name for an IP address, but failed to find the
4130 original IP address when looking up the host name (a safety check), it
4131 output the message "<ip address> does not match any IP for NULL", which was
4132 confusing, to say the least. The bug was that the host name should have
4133 appeared instead of "NULL".
4135 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4136 user that is built into the binary, and the -C or -D options is used, root
4137 privilege is dropped before the configuration file is read. In addition,
4138 logging is switched to stderr instead of the normal log files. If the
4139 configuration then re-defines the Exim user, the unprivileged environment
4140 is probably not what is expected, so Exim logs a panic warning message (but
4143 However, if deliver_drop_privilege is set, the unprivileged state may well
4144 be exactly what is intended, so the warning has been cut out in that case,
4145 and Exim is allowed to try to write to its normal log files.
4151 1. smtp_return_error_details was not giving details for temporary sender
4152 or receiver verification errors.
4154 2. Diagnose a configuration error if two authenticators have the same public
4157 3. Exim used not to create the message log file for a message until the first
4158 delivery attempt. This could be confusing when incoming messages were held
4159 for policy or load reasons. The message log file is now created at the time
4160 the message is received, and an initial "Received" line is written to it.
4162 4. The automatically generated man page for command line options had a minor
4163 bug that caused no ill effects; however, a more serious problem was that
4164 the procedure for building the man page automatically didn't always
4165 operate. Consequently, release 4.20 contains an out-of-date version. This
4166 shouldn't happen again.
4168 5. When building Exim with embedded Perl support, the script that builds the
4169 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4170 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4172 6. The freeze_tell option was not being used for messages that were frozen on
4173 arrival, either by an ACL or by local_scan().
4175 7. Added the smtp_incomplete_transaction log selector.
4177 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4178 was accepting AUTH without a new EHLO.
4180 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4181 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4184 10. Logging of TCP/IP connections (when configured) now happens in the main
4185 daemon process instead of the child process, so that the TCP/IP connection
4186 count is more accurate (but it can never be perfect).
4188 11. The use of "drop" in a nested ACL was not being handled correctly in the
4189 outer ACL. Now, if condition failure induced by the nested "drop" causes
4190 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4191 or "require"), the connection is dropped.
4193 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4194 that yield "discard" can now be used with an "accept" or a "discard" verb,
4195 but an error is generated for any others (because I can't see a useful way
4196 to define what should happen).
4198 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4199 are now processed in the same way as lines in the Exim configuration file.
4200 In particular, continuation lines are supported.
4202 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4204 15. Added -ti meaning -t -i.
4206 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4207 domains, and warn by logging if others are found.
4209 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4210 returned from GIFCONF when Exim is trying to find the list of interfaces on
4211 a host. The code in os.c has been modified to copy each ifreq to an aligned
4212 structure in all cases.
4214 Also, in some cases, the returned ifreq's were being copied to a 'struct
4215 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4216 means the last couple of bytes of an IPv6 address could be chopped if the
4217 ifreq contained only a normal sockaddr (14 bytes storage).
4219 18. Named domain lists were not supported in the hosts_treat_as_local option.
4220 An entry such as +xxxx was not recognized, and was treated as a literal
4223 19. Ensure that header lines added by a DATA ACL are included in the reject log
4224 if the ACL subsequently rejects the message.
4226 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4227 MD5 (which is deprecated).
4229 21. When testing a filter file using -bf, Exim was writing a message when it
4230 took the sender from a "From " line in the message, but it was not doing so
4231 when it took $return_path from a Return-Path: header line. It now does.
4233 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4234 with a valid header line field name (a series of printing characters
4235 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4237 23. Changed "disc" in the source to "disk" to conform to the documentation and
4238 the book and for uniformity.
4240 24. Ignore Sendmail's -Ooption=value command line item.
4242 25. When execve() failed while trying to run a command in a pipe transport,
4243 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4244 could be confused with a return value of 69 from the command itself. This
4245 has been changed to 127, the value the shell returns if it is asked to run
4246 a non-existent command. The wording for the related log line suggests a
4247 non-existent command as the problem.
4249 26. If received_header_text expands to an empty string, do not add a Received:
4250 header line to the message. (Well, it adds a token one on the spool, but
4251 marks it "old" so that it doesn't get used or transmitted.)
4253 27. Installed eximstats 1.28 (addition of -nt option).
4255 28. There was no check for failure on the call to getsockname() in the daemon
4256 code. This can fail if there is a shortage of resources on the system, with
4257 ENOMEM, for example. A temporary error is now given on failure.
4259 29. Contrary to the C standard, it seems that in some environments, the
4260 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4261 program. Exim now does this explicitly; it affects the formatting of
4262 timestamps using strftime().
4264 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4265 complaints. I've now initialized all the variables, to avoid this.
4267 32. Header lines added by a system filter were not being "seen" during
4268 transport-time rewrites.
4270 33. The info_callback() function passed to OpenSSL is set up with type void
4271 (*)(SSL *, int, int), as described somewhere. However, when calling the
4272 function (actually a macro) that sets it up, the type void(*)() is
4273 expected. I've put in a cast to prevent warnings from picky compilers.
4275 34. If a DNS black list lookup found a CNAME record, but there were no A
4276 records associated with the domain it pointed at, Exim crashed.
4278 35. If a DNS black list lookup returned more than one A record, Exim ignored
4279 all but the first. It now scans all returned addresses if a particular IP
4280 value is being sought. In this situation, the contents of the
4281 $dnslist_value variable are a list of all the addresses, separated by a
4284 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4285 to accept a host name and all its aliases if the forward lookup for any of
4286 them yielded the IP address of the incoming connection. Now it accepts only
4287 those names whose forward lookup yields the correct IP address. Any other
4288 names are discarded. This closes a loophole whereby a rogue DNS
4289 administrator could create reverse DNS records to break through a
4290 wildcarded host restriction in an ACL.
4292 37. If a user filter or a system filter that ran in a subprocess used any of
4293 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4294 the wrong values were passed to the pipe command ($thisaddress had the
4295 value of $0, $0 had the value of $1, etc). This bug was introduced by
4296 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4298 38. Improved the line breaking for long SMTP error messages from ACLs.
4299 Previously, if there was no break point between 40 and 75 characters, Exim
4300 left the rest of the message alone. Two changes have been made: (a) I've
4301 reduced the minimum length to 35 characters; (b) if it can't find a break
4302 point between 35 and 75 characters, it looks ahead and uses the first one
4303 that it finds. This may give the occasional overlong line, but at least the
4304 remaining text gets split now.
4306 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4307 file descriptors might be low, and that setting 1000 would always raise it.
4308 It turns out that in some environments, the limit is already over 1000 and
4309 that lowering it causes trouble. So now Exim takes care not to decrease it.
4311 40. When delivering a message, the value of $return_path is set to $sender_
4312 address at the start of routing (routers may change the value). By an
4313 oversight, this default was not being set up when an address was tested by
4314 -bt or -bv, which affected the outcome if any router or filter referred to
4317 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4318 log only when "message" or "log_message" are set. However, if one of the
4319 conditions was an address verification, or a call to a nested ACL, the
4320 messages generated by the underlying test were being passed through. This
4321 no longer happens. The underlying message is available in $acl_verify_
4322 message for both "message" and "log_message" expansions, so it can be
4323 passed through if needed.
4325 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4326 new expansion $bh_ to give the encoded byte string without charset
4327 translation. Translation happens only if iconv() is available; HAVE_ICONV
4328 indicates this at build time. HEADERS_CHARSET gives the charset to
4329 translate to; headers_charset can change it in the configuration, and
4330 "headers charset" can change it in an individual filter file.
4332 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4333 that creates RFC 2047 encoded "words" labels them as that charset instead
4334 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4335 expansion operator; (ii) when Exim creates a From: line for a local
4336 message; (iii) when a header line is rewritten to include a "phrase" part.
4338 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4339 buggy, causing it to skip the first lines of messages whose message ID
4340 ended in 'D'. This would not have bitten before Exim release 4.14, because
4341 message IDs were unlikely to end in 'D' before then. The effect was to have
4342 incorrect size information for certain domains.
4344 45. #include "config.h" was missing at the start of the crypt16.c module. This
4345 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4348 46. If there was a timeout during a "random" callout check, Exim treated it as
4349 a failure of the random address, and carried on sending RSET and the real
4350 address. If the delay was just some slowness somewhere, the response to the
4351 original RCPT would be taken as a response to RSET and so on, causing
4352 mayhem of various kinds.
4354 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4355 when I implemented it. It didn't allow for the fact that some option values
4356 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4357 the right test for positive values.
4359 48. Domain names in DNS records are case-independent. Exim always looks them up
4360 in lower case. Some resolvers return domain names in exactly the case they
4361 appear in the zone file, that is, they may contain uppercase letters. Not
4362 all resolvers do this - some return always lower case. Exim was treating a
4363 change of case by a resolver as a change of domain, similar to a widening
4364 of a domain abbreviation. This triggered its re-routing code and so it was
4365 trying to route what was effectively the same domain again. This normally
4366 caused routing to fail (because the router wouldn't handle the domain
4367 twice). Now Exim checks for this case specially, and just changes the
4368 casing of the domain that it ultimately uses when it transmits the message
4371 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4374 50. If a filter generated a file delivery with a non-absolute name (possible if
4375 no home directory exists for the router), the forbid_file option was not
4378 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4379 the existing equality matching.
4381 52. Exim was using ints instead of ino_t variables in some places where it was
4382 dealing with inode numbers.
4384 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4385 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4386 called TMPDIR, and if it finds it is different, it changes its value.
4388 54. The smtp_printf() function is now made available to local_scan() so
4389 additional output lines can be written before returning. There is also an
4390 smtp_fflush() function to enable the detection of a dropped connection.
4391 The variables smtp_input and smtp_batched_input are exported to
4394 55. Changed the default runtime configuration: the message "Unknown user"
4395 has been removed from the ACL, and instead placed on the localuser router,
4396 using the cannot_route_message feature. This means that any verification
4397 failures that generate their own messages won't get overridden. Similarly,
4398 the "Unrouteable address" message that was in the ACL for unverifiable
4399 relay addresses has also been removed.
4401 56. Added hosts_avoid_esmtp to the smtp transport.
4403 57. The exicyclog script was not checking for the esoteric option
4404 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4405 will work only if exicyclog is run under the appropriate euid.
4407 58. Following a discussion on the list, the rules by which Exim recognises line
4408 endings on incoming messages have been changed. The -dropcr and drop_cr
4409 options are now no-ops, retained only for backwards compatibility. The
4410 following line terminators are recognized: LF CRLF CR. However, special
4411 processing applies to CR:
4413 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4414 nor a local message in the state where . is a terminator.
4416 (ii) If a bare CR is encountered in a header line, an extra space is added
4417 after the line terminator so as not to end the header. The reasoning
4418 behind this is that bare CRs in header lines are most likely either
4419 to be mistakes, or people trying to play silly games.
4421 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4422 was being incorrectly given as 18 bytes larger than it should have been.
4423 This is a VOB (very old bug).
4425 60. This may never have affected anything current, but just in case it has:
4426 When the local host is found other than at the start of a list of hosts,
4427 the local host, those with the same MX, and any that follow, are discarded.
4428 When the list in question was part of a longer list of hosts, the following
4429 hosts (not currently being processed) were also being discarded. This no
4430 longer happens. I'm not sure if this situation could ever has previously
4433 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4436 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4437 header. This is something that is recommended in a new Internet Draft, and
4438 is something that is documented as being done by Sendmail. There are two
4439 possible values. For messages generated by the autoreply transport, Exim
4442 Auto-Submitted: auto-replied
4444 whereas for all other generated messages (e.g. bounces) it adds
4446 Auto-Submitted: auto-generated
4448 63. The "personal" condition in filters now includes a test for the
4449 Auto-Submitted: header. If it contains the string "auto-" the message it
4450 not considered personal.
4452 64. Added rcpt_include_affixes as a generic transport option.
4454 65. Added queue_only_override (default true).
4456 66. Added the syslog_duplication option.
4458 67. If what should have been the first header line of a message consisted of
4459 a space followed by a colon, Exim was mis-interpreting it as a header line.
4460 It isn't of course - it is syntactically invalid and should therefore be
4461 treated as the start of the message body. The misbehaviour could have
4462 caused a number of strange effects, including loss of data in subsequent
4463 header lines, and spool format errors.
4465 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4466 client host had authenticated. This control can now be exercised by an ACL
4467 for more flexibility.
4469 69. By default, callouts do not happen when testing with -bh. There is now a
4470 variant, -bhc, which does actually run the callout code, including
4471 consulting and updating the callout cache.
4473 70. Added support for saslauthd authentication, courtesy of Alexander
4476 71. If statvfs() failed on the spool or log directories while checking their
4477 size for availability, Exim confusingly gave the error "space shortage".
4478 Furthermore, in debugging mode it crashed with a floating point exception.
4479 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4480 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4481 serious problem, Exim now writes to the main and panic logs when this
4482 happens, with details of the failure. It then refuses to accept the
4483 incoming message, giving the message "spool directory problem" or "log
4484 directory problem" with a 421 code for SMTP messages.
4486 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4487 0, 1, and 2 exist, because some OS complain for execs without them (see
4488 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4489 descriptors. However, the code omitted to check that the open succeeded,
4490 causing mysterious errors if for some reason the permissions on /dev/null
4491 got screwed. Now Exim writes a message to the main and panic logs, and
4492 bombs out if it can't open /dev/null.
4494 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4495 interact so that it is all more flexible. It is supposed to remain
4496 backwards compatible. Also added extra_local_interfaces.
4498 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4499 to bomb out with an assertion failure - to the client this appears as a
4500 connection drop. This problem occurs in the part of the code that was taken
4501 from the Samba project. Fortunately, the assertion is in a very simple
4502 function, so I have fixed this by reproducing the function inline in the
4503 one place where it is called, and arranging for authentication to fail
4504 instead of killing the process with assert().
4506 75. The SPA client code was not working when the server requested OEM rather
4507 than Unicode encoding.
4509 76. Added code to make require_files with a specific uid setting more usable in
4510 the case where statting the file as root fails - usually a non-root-mounted
4511 NFS file system. When this happens and the failure is EACCES, Exim now
4512 forks a subprocess and does the per-uid checking as the relevant uid.
4514 77. Added process_log_path.
4516 78. If log_file_path was not explicitly set, a setting of check_log_space or
4517 check_log_inodes was ignored.
4519 79. If a space check for the spool or log partitions fails, the incident is now
4520 logged. Of course, in the latter case the data may get lost...
4522 80. Added the %p formatting code to string_format() so that it can be used to
4523 print addresses in debug_print(). Adjusted all the address printing in the
4524 debugging in store.c to use %p rather than %d.
4526 81. There was a concern that a line of code in smtp_in.c could overflow a
4527 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4528 initially expressed, the concern was not well-founded, because trailing
4529 spaces are removed early. However, if the trailing spaces were followed by
4530 a NULL, they did not get removed, so the overflow was possible. Two fixes
4533 (a) I re-wrote the offending code in a cleaner fashion.
4534 (b) If an incoming SMTP command contains a NULL character, it is rejected
4537 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4538 runs initgroups(), so that if the Exim user is in any additional groups,
4539 they will be used during message reception.
4545 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob