1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.459 2007/01/23 12:22:00 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.
29 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
30 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
32 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
33 FSYNC, which compiles an option called disable_fsync that allows for
34 bypassing fsync(). The documentation is heavily laced with warnings.
36 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
38 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
39 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
40 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
41 including adding "make clean"; (3) Added -fPIC when compiling the test
42 dynamically loaded module, to get rid of a warning.
44 PH/07 There was a bug in the dovecot authenticator such that the value of
45 $auth1 could be overwritten, and so not correctly preserved, after a
46 successful authentication. This usually meant that the value preserved by
47 the server_setid option was incorrect.
53 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
54 fixed by 4.65/MH/01 (is this a record?) are fixed:
56 (i) An empty string was always treated as zero by the numeric comparison
57 operators. This behaviour has been restored.
59 (ii) It is documented that the numeric comparison operators always treat
60 their arguments as decimal numbers. This was broken in that numbers
61 starting with 0 were being interpreted as octal.
63 While fixing these problems I realized that there was another issue that
64 hadn't been noticed. Values of message_size_limit (both the global option
65 and the transport option) were treated as octal if they started with 0.
66 The documentation was vague. These values are now always treated as
67 decimal, and I will make that clear in the documentation.
73 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
74 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
77 MH/01 Don't check that the operands of numeric comparison operators are
78 integers when their expansion is in "skipping" mode (fixes bug
79 introduced by 4.64-PH/07).
81 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
82 child addresses, Exim now panics and dies. Previously, because the count
83 is held in a short int, deliveries were likely to be lost. As such a
84 large number of recipients for a single message is ridiculous
85 (performance will be very, very poor), I have chosen to impose a limit
86 rather than extend the field.
92 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
93 leftover -K file (the existence of which was triggered by #402).
94 While we were at it, introduced process PID as part of the -K
95 filename. This should rule out race conditions when creating
98 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
99 processing considerably. Previous code took too long for large mails,
100 triggering a timeout which in turn triggers #401.
102 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
103 in the DK code in transports.c. sendfile() is not really portable,
104 hence the _LINUX specificness.
106 TF/01 In the add_headers option to the mail command in an Exim filter,
107 there was a bug that Exim would claim a syntax error in any
108 header after the first one which had an odd number of characters
111 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
112 callout verification, Exim cached a "reject" for the entire domain. This
113 is correct for most verifications, but it is not correct for a recipient
114 verification with use_sender or use_postmaster set, because in that case
115 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
116 case of MAIL FROM:<> rejection from other early rejections (e.g.
117 rejection of HELO). When verifying a recipient using a non-null MAIL
118 address, the cache is ignored if it shows MAIL FROM:<> rejection.
119 Whatever the result of the callout, the value of the domain cache is
120 left unchanged (for any other kind of callout, getting as far as trying
121 RCPT means that the domain itself is ok).
123 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
126 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
127 manifest itself as EPIPE rather than ECONNECT. When tidying away a
128 session, the daemon ignores ECONNECT errors and logs others; it now
129 ignores EPIPE as well.
131 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
132 (quoted-printable decoding).
134 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
135 later the small subsequent patch to fix an introduced bug.
137 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
139 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
141 PH/08 An error is now given if message_size_limit is specified negative.
143 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
144 to be given (somewhat) arbitrary names.
146 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
149 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
150 miscellaneous code fixes
152 PH/10 Added the log_reject_target ACL modifier to specify where to log
155 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
156 hostname. This is wrong, because it relates to the incoming message (and
157 probably the interface on which it is arriving) and not to the outgoing
158 callout (which could be using a different interface). This has been
159 changed to use the value of the helo_data option from the smtp transport
160 instead - this is what is used when a message is actually being sent. If
161 there is no remote transport (possible with a router that sets up host
162 addresses), $smtp_active_hostname is used.
164 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
165 tweaks were necessary in order to get it to work (see also 21 below):
166 (a) The code assumed that strncpy() returns a negative number on buffer
167 overflow, which isn't the case. Replaced with Exim's string_format()
169 (b) There were several signed/unsigned issues. I just did the minimum
170 hacking in of casts. There is scope for a larger refactoring.
171 (c) The code used strcasecmp() which is not a standard C function.
172 Replaced with Exim's strcmpic() function.
173 (d) The code set only $1; it now sets $auth1 as well.
174 (e) A simple test gave the error "authentication client didn't specify
175 service in request". It would seem that Dovecot has changed its
176 interface. Fortunately there's a specification; I followed it and
177 changed what the client sends and it appears to be working now.
179 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
182 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
183 address A is aliased to B and C, where B exists and C does not. Without
184 -v the output is "A verified" because verification stops after a
185 successful redirection if more than one address is generated. However,
186 with -v the child addresses are also verified. Exim was outputting "A
187 failed to verify" and then showing the successful verification for C,
188 with its parentage. It now outputs "B failed to verify", showing B's
189 parentage before showing the successful verification of C.
191 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
192 look up a TXT record in a specific list after matching in a combined
195 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
196 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
197 they consult the DNS. I had assumed they would set it the way they
198 wanted; and indeed my experiments on Linux seem to show that in some
199 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
200 To be on the safe side, however, I have now made the interface to
201 host_find_byname() similar to host_find_bydns(), with an argument
202 containing the DNS resolver options. The host_find_byname() function now
203 sets these options at its start, just as host_find_bydns() does. The smtp
204 transport options dns_qualify_single and dns_search_parents are passed to
205 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
206 of host_find_byname() use the default settings of RES_DEFNAMES
207 (qualify_single) but not RES_DNSRCH (search_parents).
209 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
210 spool_read_header() do less string testing, by means of a preliminary
211 switch on the second character of optional "-foo" lines. (This is
212 overdue, caused by the large number of possibilities that now exist.
213 Originally there were few.) While I was there, I also converted the
214 str(n)cmp tests so they don't re-test the leading "-" and the first
215 character, in the hope this might squeeze out yet more improvement.
217 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
218 flag allowing group syntax was set by the header_syntax check but not
219 turned off, possible causing trouble later; (2) The flag was not being
220 set at all for the header_verify test, causing "group"-style headers to
221 be rejected. I have now set it in this case, and also caused header_
222 verify to ignore an empty address taken from a group. While doing this, I
223 came across some other cases where the code for allowing group syntax
224 while scanning a header line wasn't quite right (mostly, not resetting
225 the flag correctly in the right place). These bugs could have caused
226 trouble for malformed header lines. I hope it is now all correct.
228 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
229 with the "reply" argument non-NULL. The code, however (which originally
230 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
231 but it didn't always do it. This confused somebody who was copying the
232 code for some other use. I have removed all the tests.
234 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
235 feature that was used to support insecure browsers during the U.S. crypto
236 embargo. It requires special client support, and Exim is probably the
237 only MTA that supported it -- and would never use it because real RSA is
238 always available. This code has been removed, because it had the bad
239 effect of slowing Exim down by computing (never used) parameters for the
240 RSA_EXPORT functionality.
242 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
243 authenticator to fail if there's a tab character in the incoming data
244 (there should never be unless someone is messing about, as it's supposed
245 to be base64-encoded). Also added, on Timo's advice, the "secured" option
246 if the connection is using TLS or if the remote IP is the same as the
247 local IP, and the "valid-client-cert option" if a client certificate has
250 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
251 authenticators. This can be used for authorization after authentication
252 succeeds. (In the case of plaintext, it servers for both authentication
255 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
256 if any retry times were supplied.
258 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
259 connection, where there is no client IP address to check. In this
260 situation, the verify now always succeeds.
262 PH/25 Applied John Jetmore's -Mset patch.
264 PH/26 Added -bem to be like -Mset, but loading a message from a file.
266 PH/27 In a string expansion for a processed (not raw) header when multiple
267 headers of the same name were present, leading whitespace was being
268 removed from all of them, but trailing whitespace was being removed only
269 from the last one. Now trailing whitespace is removed from each header
270 before concatenation. Completely empty headers in a concatenation (as
273 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
274 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
276 PH/29 [Removed. This was a change that I later backed out, and forgot to
277 correct the ChangeLog entry (that I had efficiently created) before
278 committing the later change.]
280 PH/30 Exim was sometimes attempting to deliver messages that had suffered
281 address errors (4xx response to RCPT) over the same connection as other
282 messages routed to the same hosts. Such deliveries are always "forced",
283 so retry times are not inspected. This resulted in far too many retries
284 for the affected addresses. The effect occurred only when there were more
285 hosts than the hosts_max_try setting in the smtp transport when it had
286 the 4xx errors. Those hosts that it had tried were not added to the list
287 of hosts for which the message was waiting, so if all were tried, there
288 was no problem. Two fixes have been applied:
290 (i) If there are any address or message errors in an SMTP delivery, none
291 of the hosts (tried or untried) are now added to the list of hosts
292 for which the message is waiting, so the message should not be a
293 candidate for sending over the same connection that was used for a
294 successful delivery of some other message. This seems entirely
295 reasonable: after all the message is NOT "waiting for some host".
296 This is so "obvious" that I'm not sure why it wasn't done
297 previously. Hope I haven't missed anything, but it can't do any
298 harm, as the worst effect is to miss an optimization.
300 (ii) If, despite (i), such a delivery is accidentally attempted, the
301 routing retry time is respected, so at least it doesn't keep
302 hammering the server.
304 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
305 in ${readsocket because some servers need this prod.
307 PH/32 Added some extra debug output when updating a wait-xxx database.
309 PH/33 The hint "could be header name not terminated by colon", which has been
310 given for certain expansion errors for a long time, was not being given
311 for the ${if def:h_colon_omitted{... case.
313 PH/34 The spec says: "With one important exception, whenever a domain list is
314 being scanned, $domain contains the subject domain." There was at least
315 one case where this was not true.
317 PH/35 The error "getsockname() failed: connection reset by peer" was being
318 written to the panic log as well as the main log, but it isn't really
319 panic-worthy as it just means the connection died rather early on. I have
320 removed the panic log writing for the ECONNRESET error when getsockname()
323 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
324 runs only) independently of the message's sender address. This meant
325 that, if the 4xx error was in fact related to the sender, a different
326 message to the same recipient with a different sender could confuse
327 things. In particualar, this can happen when sending to a greylisting
328 server, but other circumstances could also provoke similar problems.
329 I have changed the default so that the retry time for these errors is now
330 based a combination of the sender and recipient addresses. This change
331 can be overridden by setting address_retry_include_sender=false in the
334 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
335 remote server are returned as part of bounce messages. This was not
336 happening for LMTP over a pipe (the lmtp transport), but now it is the
337 same for both kinds of LMTP.
339 PH/38 Despite being documented as not happening, Exim was rewriting addresses
340 in header lines that were in fact CNAMEs. This is no longer the case.
342 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
343 and queue runs started by the daemon processed all messages. This has
344 been fixed so that -R and -S can now usefully be given with -q<time>.
346 PH/40 Import PCRE release 6.7 (fixes some bugs).
348 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
350 PH/42 Give an error if -q is specified more than once.
352 PH/43 Renamed the variables $interface_address and $interface_port as
353 $received_ip_address and $received_port, to make it clear that these
354 values apply to message reception, and not to the outgoing interface when
355 a message is delivered. (The old names remain recognized, of course.)
357 PH/44 There was no timeout on the connect() call when using a Unix domain
358 socket in the ${readsocket expansion. There now is.
360 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
361 be meaningful with "accept".
363 SC/01 Eximstats V1.43
364 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
366 SC/02 Eximstats V1.44
367 Use a glob alias rather than an array ref in the generated
368 parser. This improves both readability and performance.
370 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
371 Collect SpamAssassin and rejection statistics.
372 Don't display local sender or destination tables unless
373 there is data to show.
374 Added average volumes into the top table text output.
376 SC/04 Eximstats V1.46
377 Collect data on the number of addresses (recipients)
378 as well as the number of messages.
380 SC/05 Eximstats V1.47
381 Added 'Message too big' to the list of mail rejection
382 reasons (thanks to Marco Gaiarin).
384 SC/06 Eximstats V1.48
385 Mainlog lines which have GMT offsets and are too short to
386 have a flag are now skipped.
388 SC/07 Eximstats V1.49 (Alain Williams)
389 Added the -emptyok flag.
391 SC/08 Eximstats V1.50
392 Fixes for obtaining the IP address from reject messages.
394 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
395 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
396 whitesspace changes from 4.64-PH/27
398 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
401 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
402 are found, allow negative numbers in numeric criteria)
404 JJ/06 exipick.20061117.2, added new $message_body_missing variable
406 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
407 to match changes made in 4.64-PH/43
409 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
411 PH/47 Put in an explicit test for a DNS lookup of an address record where the
412 "domain" is actually an IP address, and force a failure. This locks out
413 those revolvers/nameservers that support "A-for-A" lookups, in
414 contravention of the specifications.
416 PH/48 When a host name was looked up from an IP address, and the subsequent
417 forward lookup of the name timed out, the host name was left in
418 $sender_host_name, contrary to the specification.
420 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
421 restricted to single-key lookups, Exim was not diagnosing an error if
422 * or *@ was used with a query-style lookup.
424 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
426 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
427 long ago, but noone interested enough thought of it. Let's just say that
428 the "1.1" means that there are some new functions that weren't there at
429 some point in the past.
431 PH/51 Error processing for expansion failure of helo_data from an smtp
432 transport during callout processing was broken.
434 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
435 tested/used via the -bh/-bhc/-bs options.
437 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
438 bug, fixed in subsequent PCRE releases).
440 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
441 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
443 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
449 SC/01 Use a glob alias rather than an array ref in eximstats generated
450 parser. This improves both readability and performance.
452 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
453 Don't display local sender or destination tables in eximstats unless
454 there is data to show.
455 Added average volumes into the eximstats top table text output.
457 SC/03 Collect data on the number of addresses (recipients) as well
458 as the number of messages in eximstats.
460 TF/01 Correct an error in the documentation for the redirect router. Exim
461 does (usually) call initgroups() when daemonizing.
463 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
464 with consistent privilege compared to when running as a daemon.
466 TF/03 Note in the spec that $authenticated_id is not set for local
467 submissions from trusted users.
469 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
470 Thanks to Dean Brooks <dean@iglou.com> for the patch.
472 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
473 by adding some example configuration directives to the default
474 configuration file. A little bit of work is required to uncomment the
475 directives and define how usernames and passwords are checked, but
476 there is now a framework to start from.
478 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
479 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
480 without this. I don't know how relevant this is to other LDAP libraries.
482 PH/02 Add the verb name to the "unknown ACL verb" error.
484 PH/03 Magnus Holmgren's patch for filter_prepend_home.
486 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
488 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
489 directory not expanded when it should be if an expanded home directory
490 was set for the address (which is overridden by the transport).
492 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
495 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
496 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
497 because it is too late at that time, and has no effect.
499 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
500 security issue with \' (bugzilla #107). I could not use the
501 PQescapeStringConn() function, because it needs a PGconn value as one of
504 PH/08 When testing addresses using -bt, indicate those final addresses that
505 are duplicates that would not cause an additional delivery. At least one
506 person was confused, thinking that -bt output corresponded to deliveries.
507 (Suppressing duplicates isn't a good idea as you lose the information
508 about possibly different redirections that led to the duplicates.)
510 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
511 systems where poll() doesn't work, in particular OS X.
513 PH/10 Added more information to debugging output for retry time not reached.
515 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
516 operations in malware.c.
518 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
521 PH/13 If write_rejectlog was set false when logging was sent to syslog with
522 syslog_duplication set false, log lines that would normally be written
523 both the the main log and to the reject log were not written to syslog at
526 PH/14 In the default configuration, change the use of "message" in ACL warn
527 statements to "add_header".
529 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
530 not followed by a command (e.g. "seen endif").
532 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
533 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
536 PH/17 Added extra conditions to the default value of delay_warning_condition
540 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
541 { match{$h_precedence:}{(?i)bulk|list|junk} } \
542 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
545 The Auto-Submitted: and various List- headers are standardised, whereas I
546 don't think Precedence: ever was.
548 PH/18 Refactored debugging code in route_finduser() to show more information,
549 in particular, the error code if getpwnam() issues one.
551 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
552 This is apparently needed in addition to the PH/07 change above to avoid
553 any possible encoding problems.
555 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
556 but not after initializing Perl.
558 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
559 output them only if debugging. By default they are written stderr,
560 apparently, which is not desirable.
562 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
565 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
568 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
570 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
571 authenticated or an ident call has been made. Suppress the default
572 values for $authenticated_id and $authenticated_sender (but permit -oMai
573 and -oMas) when testing with -bh.
575 PH/24 Re-jigged the order of the tests in the default configuration so that the
576 tests for valid domains and recipients precede the DNS black list and CSA
577 tests, on the grounds that those ones are more expensive.
579 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
580 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
581 This bug exists in every version of Exim that I still have, right back to
584 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
585 However, an attempt to turn on case-sensitivity in a regex key by
586 including (?-i) didn't work because the subject string was already
587 lowercased, and the effects were non-intuitive. It turns out that a
588 one-line patch can be used to allow (?-i) to work as expected.
594 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
595 other effects) broke the use of negated acl sub-conditions.
597 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
600 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
601 "Deny" causes Exim to reject the incoming connection with a 554 error.
602 Unfortunately, if there is a major crisis, such as a disk failure,
603 tcp-wrappers gives "deny", whereas what one would like would be some
604 kind of temporary error. A kludge has been added to help with this.
605 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
606 554 error is used if errno is still zero or contains ENOENT (which occurs
607 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
610 PH/03 Add -lutil to the default FreeBSD LIBS setting.
612 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
613 errors. Otherwise a message that provokes a temporary error (when other
614 messages do not) can cause a whole host to time out.
616 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
617 addresses were routed directly to files or pipes from a redirect router.
618 File deliveries just didn't batch; pipe deliveries might have suffered
621 PH/06 A failure to get a lock for a hints database would erroneously always say
622 "Failed to get write lock", even when it was really a read lock.
624 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
625 of 0600. This has been changed to use the value of the lockfile_mode
626 option (which defaults to 0600).
628 PH/08 Applied small patch from the Sieve maintainer.
630 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
631 folder from quota calculations, a direct delivery into this folder messed
632 up the contents of the maildirsize file. This was because the regex was
633 used only to exclude .Trash (or whatever) when the size of the mailbox
634 was calculated. There was no check that a delivery was happening into an
635 excluded directory. This bug has been fixed by ignoring all quota
636 processing for deliveries into excluded directories.
638 PH/10 Added the maildirfolder_create_regex option to appendfile.
644 PH/01 The code for finding all the local interface addresses on a FreeBSD
645 system running IPv6 was broken. This may well have applied to all BSD
646 systems, as well as to others that have similar system calls. The broken
647 code found IPv4 interfaces correctly, but gave incorrect values for the
648 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
649 that it would not match correctly against @[] and not recognize the IPv6
652 PH/02 The ipliteral router was not recognizing addresses of the form user@
653 [ipv6:....] because it didn't know about the "ipv6:" prefix.
655 PH/03 Added disable_ipv6.
657 PH/04 Changed $reply_address to use the raw form of the headers instead of the
658 decoded form, because it is most often used to construct To: headers
659 lines in autoreplies, and the decoded form may well be syntactically
660 invalid. However, $reply_address has leading white space removed, and all
661 newlines turned into spaces so that the autoreply transport does not
664 PH/05 If group was specified without a user on a router, and no group or user
665 was specified on a transport, the group from the router was ignored.
667 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
668 for visible compile-time settings that can be used to change these
669 numbers, for those that want even more. Backwards compatibility with old
670 spool files has been maintained. However, going back to a previous Exim
671 release will lost any variables that are in spool files.
673 PH/07 Two small changes when running in the test harness: increase delay when
674 passing a TCP/IP connection to a new process, in case the original
675 process has to generate a bounce, and remove special handling of
676 127.0.0.2 (sic), which is no longer necessary.
678 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
679 be the same on different OS.
681 PH/09 Moved a debug statement in filter processing to avoid a race problem when
684 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
685 whether --show-vars was specified or not
687 JJ/02 exipick: Added support for new ACL variable spool format introduced
690 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
691 syntactically invalid From: or Reply-to: line, and a filter used this to
692 generate an autoreply, and therefore failed to obtain an address for the
693 autoreply, Exim could try to deliver to a non-existent relative file
694 name, causing unrelated and misleading errors. What now happens is that
695 it logs this as a hard delivery error, but does not attempt to create a
698 PH/11 The exinext utility has a -C option for testing purposes, but although
699 the given file was scanned by exinext itself; it wasn't being passed on
700 when Exim was called.
702 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
703 an end-of-file indication when reading a command response.
705 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
706 compiled. In many other places in Exim, IPv6 addresses are always
707 recognized, so I have changed this. It also means that IPv4 domain
708 literals of the form [IPV4:n.n.n.n] are now always recognized.
710 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
711 used if the router is not running as root, for example, when verifying at
712 ACL time, or when using -bh. The debugging output from this situation was
713 non-existent - all you got was a failure to exec. I have made two
716 (a) Failures to set uid/gid, the current directory, or a process leader
717 in a subprocess such as that created by queryprogram now generate
718 suitable debugging ouput when -d is set.
720 (b) The queryprogram router detects when it is not running as root,
721 outputs suitable debugging information if -d is set, and then runs
722 the subprocess without attempting to change uid/gid.
724 PH/15 Minor change to Makefile for building test_host (undocumented testing
727 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
728 additional section of a DNS packet that returns MX or SRV records.
729 Instead, it always explicitly searches for A/AAAA records. This avoids
730 major problems that occur when a DNS server includes only records of one
731 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
732 fixed another bug: if SRV records were looked up and the corresponding
733 address records were *not* found in the additional section, the port
734 values from the SRV records were lost.
736 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
737 using the correct key (the original address) when searching the retry
738 rules in order to find which one to use for generating the retry hint.
740 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
741 adding the default one. Similarly, if it contains a Reply-To: header, the
742 errors_reply_to option, if set, is not used.
744 PH/19 When calculating a retry time, Exim used to measure the "time since
745 failure" by looking at the "first failed" field in the retry record. Now
746 it does not use this if it is later than than the arrival time of the
747 message. Instead it uses the arrival time. This makes for better
748 behaviour in cases where some deliveries succeed, thus re-setting the
749 "first failed" field. An example is a quota failure for a huge message
750 when small messages continue to be delivered. Without this change, the
751 "time since failure" will always be short, possible causing more frequent
752 delivery attempts for the huge message than are intended.
753 [Note: This change was subsequently modified - see PH/04 for 4.62.]
755 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
756 $1, $2, $3) because the numerical variables can be reset during some
757 expansion items (e.g. "match"), thereby losing the authentication data.
759 PH/21 Make -bV show the size of off_t variables so that the test suite can
760 decide whether to run tests for quotas > 2G.
762 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
763 mailbox_size, and mailbox_filecount in the appendfile transport. If a
764 filecount value is greater than 2G or if a quota value is greater than 2G
765 on a system where the size of off_t is not greater than 4, a panic error
768 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
769 never match. The debug and -bh output now contains an explicit error
770 message indicating a malformed IPv4 address or mask.
772 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
773 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
776 PH/25 Do not write to syslog when running in the test harness. The only
777 occasion when this arises is a failure to open the main or panic logs
778 (for which there is an explicit test).
780 PH/26 Added the /no_tell option to "control=freeze".
782 PH/27 If a host name lookup failed very early in a connection, for example, if
783 the IP address matched host_lookup and the reverse lookup yielded a name
784 that did not have a forward lookup, an error message of the form "no IP
785 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
786 could be logged. Now it outputs the IP address instead of "NULL".
788 PH/28 An enabling patch from MH: add new function child_open_exim2() which
789 allows the sender and the authenticated sender to be set when
790 submitting a message from within Exim. Since child_open_exim() is
791 documented for local_scan(), the new function should be too.
793 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
794 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
795 results in an empty string is now treated as unset.
797 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
799 PH/31 Added sender_verify_fail logging option.
801 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
802 needed by RFC 822 but not by RFC 2822 was commented out. I have now
803 tidied the source and removed it altogether.
805 PH/33 When a queue run was abandoned because the load average was too high, a
806 log line was always written; now it is written only if the queue_run log
807 selector is set. In addition, the log line for abandonment now contains
808 information about the queue run such as the pid. This is always present
809 in "start" and "stop" lines but was omitted from the "abandon" line.
811 PH/34 Omit spaces between a header name and the colon in the error message that
812 is given when verify = headers_syntax fails (if there are lots of them,
813 the message gets confusing).
815 PH/35 Change the default for dns_check_names_pattern to allow slashes within
816 names, as there are now some PTR records that contain slashes. This check
817 is only to protect against broken name servers that fall over on strange
818 characters, so the fact that it applies to all lookups doesn't matter.
820 PH/36 Now that the new test suite is complete, we can remove some of the
821 special code in Exim that was needed for the old test suite. For example,
822 sorting DNS records because real resolvers return them in an arbitrary
823 order. The new test suite's fake resolver always returns records in the
826 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
827 bounces) except when queue_only is set, to avoid logging races between
828 the different processes.
830 PH/38 Panic-die if .include specifies a non-absolute path.
832 PH/39 A tweak to the "H" retry rule from its user.
834 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
835 a label. They prevented compilation on older perls.
837 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
838 a warning to be raised on newish perls.
840 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
841 on queue. Changes to match documented behaviour of showing count of
842 messages matching specified criteria.
844 PH/40 Changed the default ident timeout from 30s to 5s.
846 PH/41 Added support for the use of login_cap features, on those BSD systems
847 that have them, for controlling the resources used by pipe deliveries.
849 PH/42 The content-scanning code uses fopen() to create files in which to put
850 message data. Previously it was not paying any attention to the mode of
851 the files. Exim runs with umask(0) because the rest of the code creates
852 files with open(), and sets the required mode explicitly. Thus, these
853 files were ending up world-writeable. This was not a big issue, because,
854 being within the spool directory, they were not world-accessible. I have
855 created a function called modefopen, which takes an additional mode
856 argument. It sets umask(777), creates the file, chmods it to the required
857 mode, then resets the umask. All the relevant calls to fopen() in the
858 content scanning code have been changed to use this function.
860 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
861 to 24 hours. This avoids potential overflow problems when processing G
862 and H retry rules. I suspect nobody ever tinkers with this value.
864 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
866 PH/45 When the plaintext authenticator is running as a client, the server's
867 challenges are checked to ensure they are valid base64 strings. By
868 default, the authentication attempt is cancelled if an invalid string is
869 received. Setting client_ignore_invalid_base64 true ignores these errors.
870 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
871 they are received. Thus, the responses can be made to depend on the
872 challenges. If an invalid string is ignored, an empty string is placed in
875 PH/46 Messages that are created by the autoreply transport now contains a
876 References: header, in accordance with RFCs 2822 and 3834.
878 PH/47 Added authenticated_sender_force to the smtp transport.
880 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
882 PH/49 Installed latest patch from the Sieve maintainer.
884 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
885 was also set, the appendfile transport was unnecessarily scanning a
886 directory of message files (e.g. for maildir delivery) to find the count
887 of files (along with the size), even though it did not need this
888 information. It now does the scan only if it needs to find either the
889 size of the count of files.
891 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
893 PH/52 Two bugs concerned with error handling when the smtp transport is
896 (i) Exim was not creating retry information for temporary errors given
897 for individual recipients after the DATA command when the smtp transport
898 was used in LMTP mode. This meant that they could be retried too
899 frequently, and not timed out correctly.
901 (ii) Exim was setting the flag that allows error details to be returned
902 for LMTP errors on RCPT commands, but not for LMTP errors for individual
903 recipients that were returned after the DATA command.
905 PH/53 This is related to PH/52, but is more general: for any failing address,
906 when detailed error information was permitted to be returned to the
907 sender, but the error was temporary, then after the final timeout, only
908 "retry timeout exceeded" was returned. Now it returns the full error as
909 well as "retry timeout exceeded".
911 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
912 do this, and (what is worse) MTAs that accept it.
914 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
915 will now be deprecated.
917 PH/56 New os.c-cygwin from the Cygwin maintainer.
919 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
920 formats (previously only available in exim formats via -bpr, -bpru,
921 and -bpra. Now also available in native and exiqgrep formats)
923 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
924 with very large, slow to parse queues
926 JJ/08 exipick: added ! as generic prefix to negate any criteria format
928 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
930 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
931 responses to authentication challenges, though it was showing the
932 challenges; (ii) I've removed the CR characters from the debug output for
935 PH/58 Allow for the insertion of a newline as well as a space when a string
936 is turned into more than one encoded-word during RFC 2047 encoding. The
937 Sieve code now uses this.
939 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
940 data_4xx, lost_connection, tls_required.
942 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
943 message was being sent as an SMTP response.
945 PH/61 Add -l and -k options to exicyclog.
947 PH/62 When verifying, if an address was redirected to one new address, so that
948 verification continued, and the new address failed or deferred after
949 having set something in $address_data, the value of $address_data was not
950 passed back to the ACL. This was different to the case when no
951 redirection occurred. The value is now passed back in both cases.
953 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
954 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
955 use login_cap.h, so on its own it isn't the distinguishing feature. The
956 new name refers directly to the setclassresources() function.
958 PH/65 Added configuration files for NetBSD3.
960 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
962 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
963 is preferred over IPv4.
965 PH/68 The bounce_return_message and bounce_return_body options were not being
966 honoured for bounces generated during the reception of non-SMTP messages.
967 In particular, this applied to messages rejected by the ACL. This bug has
968 been fixed. However, if bounce_return_message is true and bounce_return_
969 body is false, the headers that are returned for a non-SMTP message
970 include only those that have been read before the error was detected.
971 (In the case of an ACL rejection, they have all been read.)
973 PH/69 The HTML version of the specification is now built in a directory called
974 spec_html instead of spec.html, because the latter looks like a path with
975 a MIME-type, and this confuses some software.
977 PH/70 Catch two compiler warnings in sieve.c.
979 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
980 function verify_get_ident() calls ip_connect() to connect a socket, but
981 if the "connect()" function timed out, ip_connect() used to close the
982 socket. However, verify_get_ident() also closes the socket later, and in
983 between Exim writes to the log, which may get opened at this point. When
984 the socket was closed in ip_connect(), the log could get the same file
985 descriptor number as the socket. This naturally causes chaos. The fix is
986 not to close the socket in ip_connect(); the socket should be closed by
987 the function that creates it. There was only one place in the code where
988 this was missing, in the iplookup router, which I don't think anybody now
989 uses, but I've fixed it anyway.
991 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
992 well as to direct DNS lookups. Otherwise the handling of names in host
993 lists is inconsistent and therefore confusing.
999 PH/01 Two changes to the default runtime configuration:
1001 (1) Move the checks for relay_from_hosts and authenticated clients from
1002 after to before the (commented out) DNS black list checks.
1004 (2) Add control=submission to the relay_from_hosts and authenticated
1005 clients checks, on the grounds that messages accepted by these
1006 statements are most likely to be submissions.
1008 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1010 (1) Generate an error if the third argument for the ${prvs expansion is
1013 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1016 (3) Reset the variables that are obtained from the first argument of
1017 ${prvscheck and used in the second argument before leaving the code,
1018 because their memory is reclaimed, so using them afterwards may do
1021 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1022 one (it's much easier than Tom thought :-).
1024 (5) Because of (4), we can now allow for the use of $prvscheck_result
1025 inside the third argument.
1027 PH/03 For some reason, the default setting of PATH when running a command from
1028 a pipe transport was just "/usr/bin". I have changed it to
1031 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1032 anything to be listed in the output from -bV.
1034 PH/05 When a filter generated an autoreply, the entire To: header line was
1035 quoted in the delivery log line, like this:
1037 => >A.N.Other <ano@some.domain> <original@ddress> ...
1039 This has been changed so that it extracts the operative address. There
1040 may be more than one such address. If so, they are comma-separated, like
1043 => >ano@some.domain,ona@other.domain <original@ddress> ...
1045 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1046 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1047 not being looked up in the rDNS to get a host name, Exim was showing the
1048 IP address twice in Received: lines, even though the IP addresses were
1049 identical. For example:
1051 Received: from [1.2.3.4] (helo=[1.2.3.4])
1053 However, if the real host name was known, it was omitting the HELO data
1054 if it matched the actual IP address. This has been tidied up so that it
1055 doesn't show the same IP address twice.
1057 PH/07 When both +timestamp and +memory debugging was on, the value given by
1058 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1059 called by the debug printing, thereby overwriting the timestamp buffer.
1060 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1062 PH/08 When the original message was included in an autoreply transport, it
1063 always said "this is a copy of the message, including all the headers",
1064 even if body_only or headers_only was set. It now gives an appropriate
1067 PH/09 Applied a patch from the Sieve maintainer which:
1069 o fixes some comments
1070 o adds the (disabled) notify extension core
1071 o adds some debug output for the result of if/elsif tests
1072 o points to the current vacation draft in the documentation
1073 and documents the missing references header update
1077 o fixes a bug in processing the envelope test (when testing
1078 multiple envelope elements, the last element determinted the
1081 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1082 Electronic Mail") by including:
1084 Auto-submitted: auto-generated
1086 in the messages that it generates (bounce messages and others, such as
1087 warnings). In the case of bounce messages for non-SMTP mesages, there was
1088 also a typo: it was using "Auto_submitted" (underscore instead of
1089 hyphen). Since every message generated by Exim is necessarily in response
1090 to another message, thes have all been changed to:
1092 Auto-Submitted: auto-replied
1094 in accordance with these statements in the RFC:
1096 The auto-replied keyword:
1098 - SHOULD be used on messages sent in direct response to another
1099 message by an automatic process,
1101 - MUST NOT be used on manually-generated messages,
1103 - MAY be used on Delivery Status Notifications (DSNs) and Message
1104 Disposition Notifications (MDNs),
1106 - MUST NOT be used on messages generated by automatic or periodic
1107 processes, except for messages which are automatic responses to
1110 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1111 to the default Received: header definition.
1113 PH/12 Added log selector acl_warn_skipped (default on).
1115 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1116 variables because (a) they are in the wrong storage pool and (b) even if
1117 they were copied, it wouldn't work properly because of the caching.
1119 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1120 checking when decoding. Apparently there are clients that generate
1121 overlong encoded strings. Why am I not surprised?
1123 PH/15 If the first argument of "${if match_address" was not empty, but did not
1124 contain an "@" character, Exim crashed. Now it writes a panic log message
1125 and treats the condition as false.
1127 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1129 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1130 extension "envelope-auth". The code is finished and in agreement with
1131 other implementations, but there is no documentation so far and in fact,
1132 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1133 not changing the active code.
1135 Print executed "if" and "elsif" statements when debugging is used. This
1136 helps a great deal to understand what a filter does.
1138 Document more things not specified clearly in RFC3028. I had all this
1139 sorted out, when out of a sudden new issues came to my mind. Oops."
1141 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1144 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1145 canonical form (as documented). However, after a host name lookup from
1146 the IP address, check_host() was doing a simple string comparison with
1147 addresses acquired from the DNS when checking that the found name did
1148 have the original IP as one of its addresses. Since any found IPv6
1149 addresses are likely to be in abbreviated form, the comparison could
1150 fail. Luckily, there already exists a function for doing the comparison
1151 by converting both addresses to binary, so now that is used instead of
1152 the text comparison.
1154 PH/20 There was another similar case to PH/19, when a complete host name was
1155 given in a host list; looking up its IP address could give an abbreviated
1156 form, whereas the current host's name might or might not be abbreviated.
1157 The same fix has been applied.
1163 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1164 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1167 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1168 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1170 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1172 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1173 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1174 Also, for "Auto-Submitted", treat anything other than "no" as
1175 non-personal, in accordance with RFC 3834. (Previously it treated
1176 anything starting "auto-" as non-personal.)
1178 TF/01 The control=submission/name=... option had a problem with syntax
1179 errors if the name included a slash character. The /name= option
1180 now slurps the rest of the string, so it can include any characters
1181 but it must come last in the list of options (after /sender_retain
1184 PH/05 Some modifications to the interface to the fake nameserver for the new
1192 TK/01 Added the "success_on_redirect" address verification option. See
1193 NewStuff for rationale and an example.
1195 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1197 PH/02 Patch to exigrep to allow it to work on syslog lines.
1199 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1200 fread() to skip over the body file's header line, because in Cygwin the
1201 header line is locked and is inaccessible.
1203 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1204 co-exist for some time) to make it clear that it is the Exim ID that is
1205 referenced, not the Message-ID: header line.
1207 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1208 string_format() function, because snprintf() does not exist on all
1211 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1212 ${stat: expansion item.
1214 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1215 protocol synchronization error", to keep the pedants happy.
1217 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1218 well as for IRIX systems, when gcc is being used. See the host.c source
1221 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1223 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1226 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1227 transport and to the smtp transport in LMTP mode.
1229 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1231 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1232 run a filter in a subprocess. This could lead to confusion in subsequent
1233 lookups in the parent process. There should also be a search_tidyup() at
1234 the end of the subprocess.
1236 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1237 only if the host matched helo_try_verify_hosts, which caused the
1238 verification to occur when the EHLO/HELO command was issued. The ACL just
1239 tested the remembered result. Now, if a previous verification attempt has
1240 not happened, "verify = helo" does it there and then.
1242 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1244 TK/03 Fix log output including CR from clamd.
1246 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1247 exist provoked a memory error which could cause a segfault.
1249 PH/15 Installed PCRE 6.2
1251 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1253 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1254 of the problem. Specifically, suggested +O2 rather than +O1 for the
1257 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1259 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1260 record, the port was not correctly logged when the outgoing_port log
1261 selector was set (it logged the transort's default port).
1263 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1264 fallback_hosts, and "hosts" in the smtp transport.
1266 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1267 host errors such as "Connection refused".
1269 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1270 authentication with radiusclient 0.4.9:
1272 - Error returned from rc_read_config was caught wrongly
1273 - Username/password not passed on to radius server due to wrong length.
1275 The presumption is that some radiusclient API changes for 4.51/PH/17
1276 were not taken care of correctly. The code is still untested by me (my
1277 Linux distribution still has 0.3.2 of radiusclient), but it was
1278 contributed by a Radius user.
1280 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1281 expanding the "port" option of the smtp transport.
1283 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1284 while reading a MIME header. Thanks to Tom Hughes for a patch.
1286 PH/24 Include config.h inside local_scan.h so that configuration settings are
1289 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1290 that in an ACL for RCPT (for example), you can examine exactly what was
1293 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1294 commands, but it was not correctly comparing the address with the actual
1295 client host address. Thus, it would show the EHLO address in Received:
1296 header lines when this was not necessary.
1298 PH/27 Added the % operator to ${eval:}.
1300 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1301 it should be ignoring failures (because with -C, for example, it has lost
1302 privilege). It wasn't ignoring creation failures other than "already
1305 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1308 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1309 because an input line was too long, either on its own, or by virtue of
1310 too many continuations, the temporary file was not being removed, and the
1311 return code was incorrect.
1313 PH/31 Missing "BOOL" in function definition in filtertest.c.
1315 PH/32 Applied Sieve patches from the maintainer.
1317 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1319 PH/33 Added "verify = not_blind".
1321 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1322 Local/Makefile (with some defaults set). These are used in built scripts
1323 such as exicyclog, but they have never been used in the exim_install
1324 script (though there are many overriding facilities there). I have
1325 arranged that the exim_install script now takes note of these two
1328 PH/35 Installed configuration files for Dragonfly.
1330 PH/36 When a locally submitted message by a trusted user did not contain a
1331 From: header, and the sender address was obtained from -f or from an SMTP
1332 MAIL command, and the trusted user did not use -F to supply a sender
1333 name, $originator_name was incorrectly used when constructing a From:
1334 header. Furthermore, $originator_name was used for submission mode
1335 messages from external hosts without From: headers in a similar way,
1336 which is clearly wrong.
1338 PH/37 Added control=suppress_local_fixups.
1340 PH/38 When log_selector = +received_sender was set, and the addition of the
1341 sender made the log line's construction buffer exactly full, or one byte
1342 less than full, an overflow happened when the terminating "\n" was
1345 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1346 when the result of a list match is failure because a DNS lookup failed.
1348 PH/40 RM_COMMAND is now used in the building process.
1350 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1351 the "build-* directories that it finds.
1353 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1354 address in a domain literal was a prefix of an interface address.
1356 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1357 when verifying a sender address, unless rewrite_headers is false.
1359 PH/44 Wrote a long comment about why errors_to addresses are verified as
1360 recipients, not senders.
1362 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1363 the ratelimit ACL was added.
1365 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1367 PH/46 Added extra information about PostgreSQL errors to the error string.
1369 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1370 avoiding the need to install special zones in a real server. This is
1371 backwards compatible; if it can't find the fake resolver, it drops back.
1372 Thus, both old and new test suites can be run.
1374 TF/02 Added util/ratelimit.pl
1376 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1377 clock is set back in time.
1379 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1380 Candler <B.Candler@pobox.com>.
1382 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1383 OK for addresses that are the result of redirections.
1385 PH/48 A number of further additions for the benefit of the new test suite,
1386 including a fake gethostbyname() that interfaces to the fake DNS resolver
1389 TF/06 The fix for widen_domains has also been applied to qualify_single and
1390 search_parents which are the other dnslookup options that can cause
1393 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1396 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1398 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1399 service" if it encountered an MX record with an empty target hostname.
1400 The message is now "an MX or SRV record indicated no SMTP service".
1402 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1403 if the DNS of the sending site is misconfigured. This is quite a
1404 common situation. This change restores the behaviour of treating a
1405 helo verification defer as a failure.
1407 PH/51 If self=fail was set on a router, the bounce message did not include the
1408 actual error message.
1414 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1416 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1417 command itself ended in error, the underlying message about the transport
1418 filter timeout was being overwritten with the pipe command error. Now the
1419 underlying error message should be appended to the second error message.
1421 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1423 PH/02 Reduce the amount of output that "make" produces by default. Full output
1424 can still be requested.
1426 PH/03 The warning log line about a condition test deferring for a "warn" verb
1427 was being output only once per connection, rather than after each
1428 occurrence (because it was using the same function as for successful
1429 "warn" verbs). This seems wrong, so I have changed it.
1431 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1432 it should not have, which might have caused a crash in the right
1433 circumstances, but probably never did.
1435 PH/04 Installed a modified version of Tony Finch's patch to make submission
1436 mode fix the return path as well as the Sender: header line, and to
1437 add a /name= option so that you can make the user's friendly name appear
1440 TF/03 Added the control = fakedefer ACL modifier.
1442 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1443 Mark Lowes for thorough testing.
1445 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1447 TK/03 Merged latest SRS patch from Miles Wilton.
1449 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1450 with the definition in sysexits.h (which is #included earlier).
1451 Fortunately, Exim does not actually use EX_OK. The code used to try to
1452 preserve the sysexits.h value, by assumimg that macro definitions were
1453 scanned for macro replacements. I have been disabused of this notion,
1454 so now the code just undefines EX_OK before #including unistd.h.
1456 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1457 in the smtp transport. When a block could not be written in a single
1458 write() function, the timeout was being re-applied to each part-write.
1459 This seems wrong - if the receiver was accepting one byte at a time it
1460 would take for ever. The timeout is now adjusted when this happens. It
1461 doesn't have to be particularly precise.
1463 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1464 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1466 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1467 without a domain if the check to <postmaster@domain> fails.
1469 SC/01 Eximstats: added -xls and the ability to specify output files
1470 (patch written by Frank Heydlauf).
1472 SC/02 Eximstats: use FileHandles for outputing results.
1474 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1476 SC/04 Eximstats: fixed display of large numbers with -nvr option
1478 SC/05 Eximstats: fixed merging of reports with empty tables.
1480 SC/06 Eximstats: added the -include_original_destination flag
1482 SC/07 Eximstats: removed tabs and trailing whitespace.
1484 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1486 TK/06 MBOX spool code: Add real "From " MBOX separator line
1487 so the .eml file is really in mbox format (even though
1488 most programs do not really care). Patch from Alex Miller.
1490 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1491 The latter is generated from $received_to and is only set if the
1492 message has one envelope recipient. SA can use these headers,
1493 obviously out-of-the-box. Patch from Alex Miller.
1495 PH/08 The ${def test on a variable was returning false if the variable's
1496 value was "0", contrary to what the specification has always said!
1497 The result should be true unless the variable is empty.
1499 PH/09 The syntax error of a character other than { following "${if
1500 def:variable_name" (after optional whitespace) was not being diagnosed.
1501 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1502 accidental colon was present, for example, could give incorrect results.
1504 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1505 result is used (not including appendfile, where other changes are about
1508 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1509 This involved changing a lot of size variables from int to off_t. It
1510 should work with maildirs and everything.
1512 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1513 spamd dying while we are connected to it.
1515 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1518 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1519 function for BDB 4.3.
1521 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1523 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1524 the sources for PCRE have been re-arranged and more files are now
1527 PH/15 The code I had for printing potentially long long variables in PH/11
1528 above was not the best (it lost precision). The length of off_t variables
1529 is now inspected at build time, and an appropriate printing format (%ld
1530 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1531 to be "long long int" or "long int". This is needed for the internal
1532 formatting function string_vformat().
1534 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1535 the configuration file to be ":syslog", then the script "guesses" where
1536 the logs files are, rather than using the compiled in default. In our
1537 case the guess is not the same as the compiled default, so the script
1538 suddenly stopped working when I started to use syslog. The patch checks
1539 to see if log_file_path is "". If so, it attempts to read it from exim
1540 with no configuration file to get the compiled in version, before it
1541 falls back to the previous guessing code."
1543 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1544 implementing BATV in an Exim configuration. See NewStuff for the gory
1547 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1548 Makefile that are specific to HP-UX.
1550 PH/18 If the "use_postmaster" option was set for a recipient callout together
1551 with the "random" option, the postmaster address was used as the MAIL
1552 FROM address for the random test, but not for the subsequent recipient
1553 test. It is now used for both.
1555 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1556 patch removes a few documentation additions to RFC 3028, because the
1557 latest draft now contains them. It adds the new en;ascii-case comparator
1558 and a new error check for 8bit text in MIME parts. Comparator and
1559 require names are now matched exactly. I enabled the subaddress
1560 extension, but it is not well tested yet (read: it works for me)."
1562 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1563 rework some of the code of TK/09 above to avoid the hardwired use of
1564 "%lld" and "long long". Replaced the call to snprintf() with a call to
1567 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1568 records point to non-existent hosts", "retry timeout exceeded", and
1569 "retry time not reached for any host after a long failure period".
1571 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1572 experimental DomainKeys support:
1574 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1575 (2) On an error such as an illegally used "control", the wrong name for
1576 the control was given.
1578 These problems did NOT occur unless DomainKeys support was compiled.
1580 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1582 PH/24 Added ${if match_ip condition.
1584 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1585 databases so that it will be absolutely obvious if a crash occurs in the
1586 DB library. This is a regular occurrence (often caused by mis-matched
1589 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1590 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1591 picked up on a user's system that detects such things. There doesn't seem
1592 to be a gcc warning option for this - only an attribute that has to be
1593 put on the function's prototype. It seems that in Fedora Core 4 they have
1594 set this on a number of new functions. No doubt there will be more in due
1597 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1598 specify a transport. However, if an address that was verified by such a
1599 router was the subject of a callout, Exim crashed because it tried to
1600 read the rcpt_include_affixes from the non-existent transport. Now it
1601 just assumes that the setting of that option is false. This bug was
1602 introduced by 4.51/PH/31.
1604 PH/28 Changed -d+all to exclude +memory, because that information is very
1605 rarely of interest, but it makes the output a lot bigger. People tend to
1606 do -d+all out of habit.
1608 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1609 code in os-type was giving problems when libc.so lives in lib64, like on
1612 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1613 aren't the modern standard, and it seems that some systems' include files
1614 don't always have them. Exim was already checking for some of the newer
1615 ones like T_AAAA, and defining it itself. I've added checks for all the
1616 record types that Exim uses.
1618 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1619 not automatically generating a new one, as it is supposed to. This
1620 prevented TLS from working. If the file did exist, but contained invalid
1621 data, a new version was generated, as expected. It was only the case of a
1622 non-existent file that was broken.
1624 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1625 with a change in libdomainkeys > 0.64.
1627 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1628 from DNS. If the selector record carries the flag, it now has
1629 precedence over the domain-wide flag.
1631 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1633 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1634 the use of a port name that isn't defined in /etc/services) occurred, the
1635 message was deferred as in a normal delivery, and thus remained on the
1636 spool, instead of being failed because of the mua_wrapper setting. This
1637 is now fixed, and I tidied up some of the mua_wrapper messages at the
1640 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1641 the messages in a hash of arrays rather than using individual hashes.
1642 This is a bit cleaner and results in dramatic memory savings, albeit
1643 at a slight CPU cost.
1645 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1646 as requested by Marc Sherman.
1648 SC/10 Eximstats: added histograms for user specified patterns as requested
1651 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1653 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1654 fopen() in the content-scanning modules that did not already have it.
1660 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1661 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1663 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1665 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1667 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1668 to test Sieve filters that use "vacation".
1670 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1671 that changes the way the GnuTLS parameters are stored in the cache file.
1672 The new format can be generated externally. For backward compatibility,
1673 if the data in the cache doesn't make sense, Exim assumes it has read an
1674 old-format file, and it generates new data and writes a new file. This
1675 means that you can't go back to an older release without removing the
1678 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1679 work if there are any delivery delays because "one_time" forces the
1680 parent to be marked "delivered", so its unseen clone is never tried
1681 again. For this reason, Exim now forbids the simultaneous setting of
1684 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1685 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1686 entry if you want to know the details. The fix, however, neglected to
1687 consider the case when local delivery batching is involved. The test for
1688 "previously delivered" was not happening when checking to see if an
1689 address could be batched with a previous (undelivered) one; under
1690 certain circumstances this could lead to multiple deliveries to the same
1693 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1694 in its include files, and this causes problems building Exim.
1696 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1697 header_syntax) but Exim was just ignoring anything given after a slash.
1698 In particular, this caused confusion with an attempt to use "verify =
1699 reverse_host_lookup/defer_ok". An error is now given when options are
1700 supplied for verify items that do not have them. (Maybe reverse_host_
1701 lookup should have a defer_ok option, but that's a different point.)
1703 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1704 defined by RFC 821) to 2048, because there were problems with some AUTH
1705 commands, and RFC 1869 says the size should be increased for extended
1706 SMTP commands that take arguments.
1708 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1711 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1712 "unknown" error; now it says that the functionality isn't in the binary.
1714 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1715 an address' error message when a string expansion fails (syntax or
1716 whatever). Otherwise the password may appear in the log. Following change
1717 PH/42 below, there is no longer a chance of it appearing in a bounce
1720 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1722 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1723 of its addresses was ever tried. (Bugzilla bug #2.)
1725 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1726 the result incorrectly in the debug output. (It correctly added a newline
1727 to what was transported.)
1729 TF/01 Added $received_time.
1731 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1732 commented out examples of how to interface to a virus scanner and to
1733 SpamAssassin. Also added commented examples of av_scanner and
1734 spamd_address settings.
1736 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1737 and controls are allowed in which ACLs. There were a couple of minor
1738 errors. Some of the entries in the conditions table (which is a table of
1739 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1740 negation of where the condition IS allowed.
1742 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1744 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1745 header file does not have a version number, so I've had to invent a new
1746 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1747 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1748 radiusclient), but it was contributed by a Radius user.
1750 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1751 files or directories, for OpenSSL.
1753 PH/19 When an Exim process that is running as root has to create an Exim log
1754 file, it does so in a subprocess that runs as exim:exim so as to get the
1755 ownership right at creation (otherwise, other Exim processes might see
1756 the file with the wrong ownership). There was no test for failure of this
1757 fork() call, which would lead to the process getting stuck as it waited
1758 for a non-existent subprocess. Forks do occasionally fail when resources
1759 run out. I reviewed all the other calls to fork(); they all seem to check
1762 PH/20 When checking for unexpected SMTP input at connect time (before writing
1763 the banner), Exim was not dealing correctly with a non-positive return
1764 from the read() function. If the client had disconnected by this time,
1765 the result was a log entry for a synchronization error with an empty
1766 string after "input=" when read() returned zero. If read() returned -1
1767 (an event I could not check), uninitialized data bytes were printed.
1768 There were reports of junk text (parts of files, etc) appearing after
1771 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1773 PH/22 Added support for macro redefinition, and (re)definition in between
1774 driver and ACL definitions.
1776 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1777 forgetting to use the resulting value; it was using the unexpanded value.
1779 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1780 hadn't been configured. The fix is from Juergen Kreileder, who
1781 understands it better than I do:
1783 "Here's what I see happening with three configured cyrus_sasl
1784 authenticators configured (plain, login, cram-md5):
1786 On startup auth_cyrus_sasl_init() gets called for each of these.
1787 This means three calls to sasl_listmech() without a specified mech_list.
1788 => SASL tests which mechs of all available mechs actually work
1789 => three warnings about OTP not working
1790 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1792 With the patch, sasl_listmech() also gets called three times. But now
1793 SASL's mech_list option is set to the server_mech specified in the the
1794 authenticator. Or in other words, the answer from sasl_listmech()
1795 gets limited to just the mech you're testing for (which is different
1797 => the return list contains just 'plain' or 'login', 'cram-md5' or
1798 nothing depending on the value of ob->server_mech.
1800 I've just tested the patch: Authentication still works fine,
1801 unavailable mechs specified in the exim configuration are still
1802 caught, and the auth.log warnings about OTP are gone."
1804 PH/25 When debugging is enabled, the contents of the command line are added
1805 to the debugging output, even when log_selector=+arguments is not
1808 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1809 answer is "GNU", and only if the return is "GNU/something" is the answer
1812 PH/27 $acl_verify_message is now set immediately after the failure of a
1813 verification in an ACL, and so is available in subsequent modifiers. In
1814 particular, the message can be preserved by coding like this:
1816 warn !verify = sender
1817 set acl_m0 = $acl_verify_message
1819 Previously, $acl_verify_message was set only while expanding "message"
1820 and "log_message" when a very denied access.
1822 PH/28 Modified OS/os.c-Linux with
1824 -#ifndef OS_LOAD_AVERAGE
1825 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1827 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1828 nomenclature these days.)
1830 PH/29 Installed patch from the Sieve maintainer that adds the options
1831 sieve_useraddress and sieve_subaddress to the redirect router.
1833 PH/30 In these circumstances:
1834 . Two addresses routed to the same list of hosts;
1835 . First host does not offer TLS;
1836 . First host accepts first address;
1837 . First host gives temporary error to second address;
1838 . Second host offers TLS and a TLS session is established;
1839 . Second host accepts second address.
1840 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1841 and peerdn, if requested) that were in fact used only for the second
1844 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1845 attention to any local part prefix or suffix that was matched by the
1846 router that accepted the address. It now behaves in the same way as it
1847 does for delivery: the affixes are removed from the local part unless
1848 rcpt_include_affixes is set on the transport.
1850 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1851 timeout during the DATA phase of an incoming message.
1853 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1854 applied a patch sanctioned by the Sieve maintainer.
1856 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1857 the uid or gid is negative. A case of a negative gid caused this to be
1858 noticed. The fix allows for either to be negative.
1860 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1861 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1864 PH/36 The change PH/12 above was broken. Fixed it.
1866 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1867 the grounds that routing the same address twice would always produce the
1868 same answer. This might have been true once, but it is certainly no
1869 longer true now. Routing a child address may depend on the previous
1870 routing that produced that child. Some complicated redirection strategies
1871 went wrong when messages had multiple recipients, and made Exim's
1872 behaviour dependent on the order in which the addresses were given.
1874 I have moved the duplicate checking until after the routing is complete.
1875 Exim scans the addresses that are assigned to local and remote
1876 transports, and removes any duplicates. This means that more work will be
1877 done, as duplicates will always all be routed, but duplicates are
1878 presumably rare, so I don't expect this is of any significance.
1880 For deliveries to pipes, files, and autoreplies, the duplicate checking
1881 still happens during the routing process, since they are not going to be
1884 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1885 It corrects a timeout issue with spamd. This is Ian's comment: "The
1886 background is that sometimes spamd either never reads data from a
1887 connection it has accepted, or it never writes response data. The exiscan
1888 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1889 blindly assumes that writes won't block so it may never time out."
1891 PH/39 Allow G after quota size as well as K and M.
1893 PH/40 The value set for $authenticated_id in an authenticator may not contain
1894 binary zeroes or newlines because the value is written to log lines and
1895 to spool files. There was no check on this. Now the value is run through
1896 the string_printing() function so that such characters are converted to
1897 printable escape sequences.
1899 PH/41 $message_linecount is a new variable that contains the total number of
1900 lines in the message. Compare $body_linecount, which is the count for the
1903 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1904 bounce and delay warning messages, except in certain special cases, which
1907 (a) An SMTP error message from a remote host;
1908 (b) A message specified in a :fail: redirection;
1909 (c) A message specified in a "fail" command in a system filter;
1910 (d) A message specified in a FAIL return from the queryprogram router;
1911 (e) A message specified by the cannot_route_message router option.
1913 In these cases only, Exim does include the error details in bounce and
1914 warning messages. There are also a few cases where bland messages such
1915 as "unrouteable address" or "local delivery error" are given.
1917 PH/43 $value is now also set for the "else" part of a ${run expansion.
1919 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1920 being worked on, but at least Exim now implements the latest version to
1923 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1924 process to complete was treated as a delivery failure, a timeout while
1925 writing the message to the pipe was logged, but erroneously treated as a
1926 successful delivery. Such timeouts include transport filter timeouts. For
1927 consistency with the overall process timeout, these timeouts are now
1928 treated as errors, giving rise to delivery failures by default. However,
1929 there is now a new Boolean option for the pipe transport called
1930 timeout_defer, which, if set TRUE, converts the failures into defers for
1931 both kinds of timeout. A transport filter timeout is now identified in
1934 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1935 systems where "make" and "gmake" are different, calling "gmake" at top
1936 level broke things. I've arranged for the value of $(MAKE) to be passed
1937 from the Makefile to this script so that it can call the same version of
1941 A note about Exim versions 4.44 and 4.50
1942 ----------------------------------------
1944 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1945 changes of various kinds. As a consequence, a big documentation update was
1946 needed. This delayed the release for rather longer than seemed good, especially
1947 in the light of a couple of (minor) security issues. Therefore, the changes
1948 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1949 release. So 4.44 and 4.50 are in effect two different branches that both start
1952 I have left the 4.50 change log unchanged; it contains all the changes since
1953 4.43. The change log for 4.44 is below; many of its items are identical to
1954 those for 4.50. This seems to be the most sensible way to preserve the
1955 historical information.
1961 1. Minor wording change to the doc/README.SIEVE file.
1963 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1964 computation of the current number of files was incorrect.
1966 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1967 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1970 4. Give more explanation in the error message when the command for a transport
1971 filter fails to execute.
1973 5. There are several places where Exim runs a non-Exim command in a
1974 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1975 was being done only for the command run by the queryprogram router. It is
1976 now done for all such subprocesses. The other cases are: ${run, transport
1977 filters, and the commands run by the lmtp and pipe transports.
1979 6. Added CONFIGURE_GROUP build-time option.
1981 7. Some older OS have a limit of 256 on the maximum number of file
1982 descriptors. Exim was using setrlimit() to set 1000 as a large value
1983 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1984 systems. I've change it so that if it can't get 1000, it tries for 256.
1986 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1987 was an oversight, and furthermore, ever since the addition of extra
1988 controls (e.g. 4.43/32), the checks on when to allow different forms of
1989 "control" were broken. There should now be diagnostics for all cases when a
1990 control that does not make sense is encountered.
1992 9. Added the /retain_sender option to "control=submission".
1994 10. $recipients is now available in the predata ACL (oversight).
1996 11. Tidy the search cache before the fork to do a delivery from a message
1997 received from the command line. Otherwise the child will trigger a lookup
1998 failure and thereby defer the delivery if it tries to use (for example) a
1999 cached ldap connection that the parent has called unbind on.
2001 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2002 of $address_data from the recipient verification was clobbered by the
2003 sender verification.
2005 13. The value of address_data from a sender verification is now available in
2006 $sender_address_data in subsequent conditions in the ACL statement.
2008 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2010 15. Added a new option "connect=<time>" to callout options, to set a different
2013 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2014 was its contents. (It was OK if the option was not defined at all.)
2016 17. A "Completed" log line is now written for messages that are removed from
2017 the spool by the -Mrm option.
2019 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2020 information about exactly what failed.
2022 19. Added -dd to debug only the daemon process.
2024 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2025 handles timeouts, both on the server side and network timeouts. Renamed the
2026 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2028 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2029 It is now set to "smtps".
2031 22. $host_address is now set to the target address during the checking of
2032 ignore_target_hosts.
2034 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2035 being passed; this would have caused $sender_host_name to have been used if
2036 matching the list had actually called for a host name (not very likely,
2037 since this list is usually IP addresses). A host name is now passed as
2040 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2041 code that specifies a non-restarting handler (typically sigaction() in
2042 modern systems) in an attempt to fix a rare and obscure crash bug.
2044 25. Narrowed the window for a race in the daemon that could cause it to ignore
2045 SIGCHLD signals. This is not a major problem, because they are used only to
2046 wake it up if nothing else does.
2048 26. A malformed maildirsize file could cause Exim to calculate negative values
2049 for the mailbox size or file count. Odd effects could occur as a result.
2050 The maildirsize information is now recalculated if the size or filecount
2053 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2054 support for a long time. Removed HAVE_SYS_VFS_H.
2056 28. Installed the latest version of exipick from John Jetmore.
2058 29. In an address list, if the pattern was not a regular expression, an empty
2059 subject address (from a bounce message) matched only if the pattern was an
2060 empty string. Non-empty patterns were not even tested. This was the wrong
2061 because it is perfectly reasonable to use an empty address as part of a
2062 database query. An empty address is now tested by patterns that are
2063 lookups. However, all the other forms of pattern expect the subject to
2064 contain a local part and a domain, and therefore, for them, an empty
2065 address still always fails if the pattern is not itself empty.
2067 30. Exim went into a mad DNS loop when attempting to do a callout where the
2068 host was specified on an smtp transport, and looking it up yielded more
2069 than one IP address.
2071 31. Re-factored the code for checking spool and log partition space into a
2072 function that finds that data and another that does the check. The former
2073 is then used to implement four new variables: $spool_space, $log_space,
2074 $spool_inodes, and $log_inodes.
2076 32. The RFC2047 encoding function was originally intended for short strings
2077 such as real names; it was not keeping to the 75-character limit for
2078 encoded words that the RFC imposes. It now respects the limit, and
2079 generates multiple encoded words if necessary. To be on the safe side, I
2080 have increased the buffer size for the ${rfc2047: expansion operator from
2083 33. It is now permitted to omit both strings after an "if" condition; if the
2084 condition is true, the result is "true". As before, when the second string
2085 is omitted, a false condition yields an empty string. This makes it less
2086 cumbersome to write custom ACL and router conditions.
2088 34. Failure to deliver a bounce message always caused it to be frozen, even if
2089 there was an errors_to setting on the router. The errors_to setting is now
2092 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2093 canonical form (fully expanded) before being placed in
2094 $sender_host_address.
2096 36. The table in the code that translates DNS record types into text (T_A to
2097 "A" for instance) was missing entries for NS and CNAME. It is just possible
2098 that this could have caused confusion if both these types were looked up
2099 for the same domain, because the text type is used as part of Exim's
2100 per-process caching. But the chance of anyone hitting this buglet seems
2103 37. The dnsdb lookup has been extended in a number of ways.
2105 (1) There is a new type, "zns", which walks up the domain tree until it
2106 finds some nameserver records. It should be used with care.
2108 (2) There is a new type, "mxh", which is like "mx" except that it returns
2109 just the host names, not the priorities.
2111 (3) It is now possible to give a list of domains (or IP addresses) to be
2112 looked up. The behaviour when one of the lookups defers can be
2113 controlled by a keyword.
2115 (4) It is now possible to specify the separator character for use when
2116 multiple records are returned.
2118 38. The dnslists ACL condition has been extended: it is now possible to supply
2119 a list of IP addresses and/or domains to be looked up in a particular DNS
2122 39. Added log_selector=+queue_time_overall.
2124 40. When running the queue in the test harness, wait just a tad after forking a
2125 delivery process, to get repeatability of debugging output.
2127 41. Include certificate and key file names in error message when GnuTLS fails
2128 to set them up, because the GnuTLS error message doesn't include the name
2129 of the failing file when there is a problem reading it.
2131 42. Allow both -bf and -bF in the same test run.
2133 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2135 44. The "Exiscan patch" is now merged into the mainline Exim source.
2137 45. Sometimes the final signoff response after QUIT could fail to get
2138 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2139 < 0 before doing a fflush(). This bug looks as though it goes back to the
2140 introduction of TLS in release 3.20, but "sometimes" must have been rare
2141 because the tests only now provoked it.
2143 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2144 (this can affect the format of dates).
2146 47. exim_tidydb, when checking for the continued existence of a message for
2147 which it has found a message-specific retry record, was not finding
2148 messages that were in split spool directories. Consequently, it was
2149 deleting retry records that should have stayed in existence.
2151 48. Steve fixed some bugs in eximstats.
2153 49. The SPA authentication driver was not abandoning authentication and moving
2154 on to the next authenticator when an expansion was forced to fail,
2155 contradicting the general specification for all authenticators. Instead it
2156 was generating a temporary error. It now behaves as specified.
2158 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2159 (the order specifies the preference for clients). The order is now AES256,
2160 AES128, 3DES, ARCFOUR128.
2162 51. Small patch to Sieve code - explicitly set From: when generating an
2165 52. Exim crashed if a remote delivery caused a very long error message to be
2166 recorded - for instance if somebody sent an entire SpamAssassin report back
2167 as a large number of 550 error lines. This bug was coincidentally fixed by
2168 increasing the size of one of Exim's internal buffers (big_buffer) that
2169 happened as part of the Exiscan merge. However, to be on the safe side, I
2170 have made the code more robust (and fixed the comments that describe what
2173 53. Now that there can be additional text after "Completed" in log lines (if
2174 the queue_time_overall log selector is set), a one-byte patch to exigrep
2175 was needed to allow it to recognize "Completed" as not the last thing in
2178 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2179 patch that reportedly fixes this has been added. I am not expert enough to
2180 create a test for it. This is what the patch creator wrote:
2182 "I found a little strange behaviour of ldap code when working with
2183 Windows 2003 AD Domain, where users was placed in more than one
2184 Organization Units. When I tried to give exim partial DN, the exit code
2185 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2186 But simultaneously result of request was absolutely normal ldap result,
2187 so I produce this patch..."
2189 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2190 REFERENCE, so I have modified the code to exclude the patch when that macro
2193 55. Some experimental protocols are using DNS PTR records for new purposes. The
2194 keys for these records are domain names, not reversed IP addresses. The
2195 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2196 leaves it alone. Component reversal etc. now happens only for IP addresses.
2199 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2201 57. Double the size of the debug message buffer (to 2048) so that more of very
2202 long debug lines gets shown.
2204 58. The exicyclog utility now does better if the number of log files to keep
2205 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2207 59. Two changes related to the smtp_active_hostname option:
2209 (1) $smtp_active_hostname is now available as a variable.
2210 (2) The default for smtp_banner uses $smtp_active_hostname instead
2211 of $primary_hostname.
2213 60. The host_aton() function is supposed to be passed a string that is known
2214 to be a valid IP address. However, in the case of IPv6 addresses, it was
2215 not checking this. This is a hostage to fortune. Exim now panics and dies
2216 if the condition is not met. A case was found where this could be provoked
2217 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2218 components; fortuitously, this particular loophole had already been fixed
2219 by change 4.50/55 above.
2221 If there are any other similar loopholes, the new check in host_aton()
2222 itself should stop them being exploited. The report I received stated that
2223 data on the command line could provoke the exploit when Exim was running as
2224 exim, but did not say which command line option was involved. All I could
2225 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2226 running as the user.
2229 61. There was a buffer overflow vulnerability in the SPA authentication code
2230 (which came originally from the Samba project). I have added a test to the
2231 spa_base64_to_bits() function which I hope fixes it.
2234 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2235 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2237 63. The daemon start-up calls getloadavg() while still root for those OS that
2238 need the first call to be done as root, but it missed one case: when
2239 deliver_queue_load_max is set with deliver_drop_privilege. This is
2240 necessary for the benefit of the queue runner, because there is no re-exec
2241 when deliver_drop_privilege is set.
2243 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2244 This has been fixed.
2246 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2247 was in use, was not putting the data itself into the right store pool;
2248 consequently, it could be overwritten for a subsequent message in the same
2249 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2252 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2254 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2255 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2256 the function were treating the return as a boolean value, which happened to
2257 work because 0=false and not-0=true, but is not correct code.
2259 68. The host_aton() function was not handling scoped IPv6 addresses (those
2260 with, for example, "%eth0" on the end) correctly.
2262 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2263 negated items (that is, ~something) in unsigned ints. Some compilers
2264 apparently mutter when there is no cast.
2266 70. If an address verification called from an ACL failed, and did not produce a
2267 user-specific message (i.e. there was only a "system" message), nothing was
2268 put in $acl_verify_message. In this situation, it now puts the system
2271 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2272 session; change 4.31/43 added the unwanted input to the log line - except
2273 that it did not do this in the start of session case. It now does.
2275 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2276 This is wrong and can cause the other end to generate a synchronization
2277 error if it is another Exim or anything else that does the synchronization
2278 check. A QUIT command is no longer sent after a timeout.
2280 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2281 during host lookups.
2283 74. The defer_ok option of callout verification was not working if it was used
2284 when verifying addresses in header lines, that is, for this case:
2286 verify = header_sender/callout=defer_ok
2288 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2289 those file descriptors could be used for SMTP connections. If anything
2290 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2291 could be sent to the SMTP client, causing chaos. The daemon now opens
2292 stdin, stdout, and stderr to /dev/null when it puts itself into the
2295 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2296 log by default. The user can override this with suitable Perl magic.
2298 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2299 the log message when discard triggers, was not working for the DATA ACL or
2300 for the non-SMTP ACL.
2302 78. Error message wording change in sieve.c.
2304 79. If smtp_accept_max_per_host was set, the number of connections could be
2305 restricted to fewer than expected, because the daemon was trying to set up
2306 a new connection before checking whether the processes handling previous
2307 connections had finished. The check for completed processes is now done
2308 earlier. On busy systems, this bug wouldn't be noticed because something
2309 else would have woken the daemon, and it would have reaped the completed
2312 80. If a message was submitted locally by a user whose login name contained one
2313 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2314 It caused a spool format error. I have fixed the spool reading code. A
2315 related problem was that the "from" clause in the Received: line became
2316 illegal because of the space(s). It is now covered by ${quote_local_part.
2318 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2321 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2323 83. Patch from Sieve maintainer to fix unterminated string problem in
2324 "vacation" handling.
2326 84. Some minor changes to the Linux configuration files to help with other
2327 OS variants using glibc.
2329 85. One more patch for Sieve to update vacation handling to latest spec.
2332 ----------------------------------------------------
2333 See the note above about the 4.44 and 4.50 releases.
2334 ----------------------------------------------------
2340 1. Change 4.43/35 introduced a bug that caused file counts to be
2341 incorrectly computed when quota_filecount was set in an appendfile
2344 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2345 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2348 3. Give more explanation in the error message when the command for a transport
2349 filter fails to execute.
2351 4. There are several places where Exim runs a non-Exim command in a
2352 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2353 was being done only for the command run by the queryprogram router. It is
2354 now done for all such subprocesses. The other cases are: ${run, transport
2355 filters, and the commands run by the lmtp and pipe transports.
2357 5. Some older OS have a limit of 256 on the maximum number of file
2358 descriptors. Exim was using setrlimit() to set 1000 as a large value
2359 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2360 systems. I've change it so that if it can't get 1000, it tries for 256.
2362 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2363 was an oversight, and furthermore, ever since the addition of extra
2364 controls (e.g. 4.43/32), the checks on when to allow different forms of
2365 "control" were broken. There should now be diagnostics for all cases when a
2366 control that does not make sense is encountered.
2368 7. $recipients is now available in the predata ACL (oversight).
2370 8. Tidy the search cache before the fork to do a delivery from a message
2371 received from the command line. Otherwise the child will trigger a lookup
2372 failure and thereby defer the delivery if it tries to use (for example) a
2373 cached ldap connection that the parent has called unbind on.
2375 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2376 of $address_data from the recipient verification was clobbered by the
2377 sender verification.
2379 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2380 was its contents. (It was OK if the option was not defined at all.)
2382 11. A "Completed" log line is now written for messages that are removed from
2383 the spool by the -Mrm option.
2385 12. $host_address is now set to the target address during the checking of
2386 ignore_target_hosts.
2388 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2389 being passed; this would have caused $sender_host_name to have been used if
2390 matching the list had actually called for a host name (not very likely,
2391 since this list is usually IP addresses). A host name is now passed as
2394 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2395 code that specifies a non-restarting handler (typically sigaction() in
2396 modern systems) in an attempt to fix a rare and obscure crash bug.
2398 15. Narrowed the window for a race in the daemon that could cause it to ignore
2399 SIGCHLD signals. This is not a major problem, because they are used only to
2400 wake it up if nothing else does.
2402 16. A malformed maildirsize file could cause Exim to calculate negative values
2403 for the mailbox size or file count. Odd effects could occur as a result.
2404 The maildirsize information is now recalculated if the size or filecount
2407 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2408 support for a long time. Removed HAVE_SYS_VFS_H.
2410 18. Updated exipick to current release from John Jetmore.
2412 19. Allow an empty sender to be matched against a lookup in an address list.
2413 Previously the only cases considered were a regular expression, or an
2416 20. Exim went into a mad DNS lookup loop when doing a callout where the
2417 host was specified on the transport, if the DNS lookup yielded more than
2420 21. The RFC2047 encoding function was originally intended for short strings
2421 such as real names; it was not keeping to the 75-character limit for
2422 encoded words that the RFC imposes. It now respects the limit, and
2423 generates multiple encoded words if necessary. To be on the safe side, I
2424 have increased the buffer size for the ${rfc2047: expansion operator from
2427 22. Failure to deliver a bounce message always caused it to be frozen, even if
2428 there was an errors_to setting on the router. The errors_to setting is now
2431 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2432 canonical form (fully expanded) before being placed in
2433 $sender_host_address.
2435 24. Updated eximstats to version 1.33
2437 25. Include certificate and key file names in error message when GnuTLS fails
2438 to set them up, because the GnuTLS error message doesn't include the name
2439 of the failing file when there is a problem reading it.
2441 26. Expand error message when OpenSSL has problems setting up cert/key files.
2444 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2445 (this can affect the format of dates).
2447 28. exim_tidydb, when checking for the continued existence of a message for
2448 which it has found a message-specific retry record, was not finding
2449 messages that were in split spool directories. Consequently, it was
2450 deleting retry records that should have stayed in existence.
2452 29. eximstats updated to version 1.35
2453 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2454 1.35 - bugfix such that pie charts by volume are generated correctly
2456 30. The SPA authentication driver was not abandoning authentication and moving
2457 on to the next authenticator when an expansion was forced to fail,
2458 contradicting the general specification for all authenticators. Instead it
2459 was generating a temporary error. It now behaves as specified.
2461 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2462 (the order specifies the preference for clients). The order is now AES256,
2463 AES128, 3DES, ARCFOUR128.
2465 31. Small patch to Sieve code - explicitly set From: when generating an
2468 32. Exim crashed if a remote delivery caused a very long error message to be
2469 recorded - for instance if somebody sent an entire SpamAssassin report back
2470 as a large number of 550 error lines. This bug was coincidentally fixed by
2471 increasing the size of one of Exim's internal buffers (big_buffer) that
2472 happened as part of the Exiscan merge. However, to be on the safe side, I
2473 have made the code more robust (and fixed the comments that describe what
2476 33. Some experimental protocols are using DNS PTR records for new purposes. The
2477 keys for these records are domain names, not reversed IP addresses. The
2478 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2479 leaves it alone. Component reversal etc. now happens only for IP addresses.
2482 34. The host_aton() function is supposed to be passed a string that is known
2483 to be a valid IP address. However, in the case of IPv6 addresses, it was
2484 not checking this. This is a hostage to fortune. Exim now panics and dies
2485 if the condition is not met. A case was found where this could be provoked
2486 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2487 components; fortuitously, this particular loophole had already been fixed
2488 by change 4.50/55 or 4.44/33 above.
2490 If there are any other similar loopholes, the new check in host_aton()
2491 itself should stop them being exploited. The report I received stated that
2492 data on the command line could provoke the exploit when Exim was running as
2493 exim, but did not say which command line option was involved. All I could
2494 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2495 running as the user.
2498 35. There was a buffer overflow vulnerability in the SPA authentication code
2499 (which came originally from the Samba project). I have added a test to the
2500 spa_base64_to_bits() function which I hope fixes it.
2503 36. The daemon start-up calls getloadavg() while still root for those OS that
2504 need the first call to be done as root, but it missed one case: when
2505 deliver_queue_load_max is set with deliver_drop_privilege. This is
2506 necessary for the benefit of the queue runner, because there is no re-exec
2507 when deliver_drop_privilege is set.
2509 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2510 was in use, was not putting the data itself into the right store pool;
2511 consequently, it could be overwritten for a subsequent message in the same
2512 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2515 38. Sometimes the final signoff response after QUIT could fail to get
2516 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2517 < 0 before doing a fflush(). This bug looks as though it goes back to the
2518 introduction of TLS in release 3.20, but "sometimes" must have been rare
2519 because the tests only now provoked it.
2525 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2526 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2527 Now it returns an integer. A number of calls were still expecting a T/F
2528 return. Fortuitously, in all cases, the tests worked in OK situations,
2529 which is the norm. However, things would have gone wrong on any write
2530 failures on the smtp file descriptor. This function is used when sending
2531 messages over SMTP and also when doing verify callouts.
2533 2. When Exim is called to do synchronous delivery of a locally submitted
2534 message (the -odf or -odi options), it no longer closes stderr before doing
2537 3. Implemented the mua_wrapper option.
2539 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2541 5. Implemented the functions header_remove(), header_testname(),
2542 header_add_at_position(), and receive_remove_recipient(), and exported them
2545 6. If an ACL "warn" statement specified the addition of headers, Exim already
2546 inserted X-ACL-Warn: at the start if there was no header name. However, it
2547 was not making this test for the second and subsequent header lines if
2548 there were newlines in the string. This meant that an invalid header could
2549 be inserted if Exim was badly configured.
2551 7. Allow an ACL "warn" statement to add header lines at the start or after all
2552 the Received: headers, as well as at the end.
2554 8. Added the rcpt_4xx retry error code.
2556 9. Added postmaster_mailfrom=xxx to callout verification option.
2558 10. Added mailfrom=xxxx to the callout verification option, for verify=
2561 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2562 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2564 12. Inserted some casts to stop certain compilers warning when using pointer
2565 differences as field lengths or precisions in printf-type calls (mostly
2566 affecting debugging statements).
2568 13. Added optional readline() support for -be (dynamically loaded).
2570 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2571 same clock tick as a message's arrival, so that its received time was the
2572 same as the "first fail" time on the retry record, and that message
2573 remained on the queue past the ultimate address timeout, every queue runner
2574 would try a delivery (because it was past the ultimate address timeout) but
2575 after another failure, the ultimate address timeout, which should have then
2576 bounced the address, did not kick in. This was a "< instead of <=" error;
2577 in most cases the first failure would have been in the next clock tick
2578 after the received time, and all would be well.
2580 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2581 being recognized when the domain list was tested by the match_domain
2582 condition in an expansion string.
2584 16. Added the ${str2b64: operator.
2586 17. Exim was always calling setrlimit() to set a large limit for the number of
2587 processes, without checking whether the existing limit was already
2588 adequate. (It did check for the limit on file descriptors.) Furthermore,
2589 errors from getrlimit() and setrlimit() were being ignored. Now they are
2590 logged to the main and panic logs, but Exim does carry on, to try to do its
2591 job under whatever limits there are.
2593 18. Imported PCRE 5.0.
2595 19. Trivial typo in log message " temporarily refused connection" (the leading
2598 20. If the log selector return_path_on_delivery was set and an address was
2599 redirected to /dev/null, the delivery process crashed because it assumed
2600 that a return path would always be set for a "successful" delivery. In this
2601 case, the whole delivery is bypassed as an optimization, and therefore no
2604 21. Internal re-arrangement: the function for sending a challenge and reading
2605 a response while authentication was assuming a zero-terminated challenge
2606 string. It's now changed to take a pointer and a length, to allow for
2607 binary data in such strings.
2609 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2611 23. Exim was not respecting finduser_retries when seeking the login of the
2612 uid under which it was called; it was always trying 10 times. (The default
2613 setting of finduser_retries is zero.) Also, it was sleeping after the final
2614 failure, which is pointless.
2616 24. Implemented tls_on_connect_ports.
2618 25. Implemented acl_smtp_predata.
2620 26. If the domain in control=submission is set empty, Exim assumes that the
2621 authenticated id is a complete email address when it generates From: or
2622 Sender: header lines.
2624 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2625 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2626 chown and chgrp in /bin and hostname in /usr/bin.
2628 28. Exim was keeping the "process log" file open after each use, just as it
2629 does for the main log. This opens the possibility of it remaining open for
2630 long periods when the USR1 signal hits a daemon. Occasional processlog
2631 errors were reported, that could have been caused by this. Anyway, it seems
2632 much more sensible not to leave this file open at all, so that is what now
2635 29. The long-running daemon process does not normally write to the log once it
2636 has entered its main loop, and it closes the log before doing so. This is
2637 so that log files can straightforwardly be renamed and moved. However,
2638 there are a couple of unusual error situations where the daemon does write
2639 log entries, and I had neglected to close the log afterwards.
2641 30. The text of an SMTP error response that was received during a remote
2642 delivery was being truncated at 512 bytes. This is too short for some of
2643 the long messages that one sometimes sees. I've increased the limit to
2646 31. It is now possible to make retry rules that apply only when a message has a
2647 specific sender, in particular, an empty sender.
2649 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2650 it possible to be selective about when SMTP synchronization is enforced.
2652 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2654 32. Implemented hosts_connection_nolog.
2656 33. Added an ACL for QUIT.
2658 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2661 35. Added mailbox_size and mailbox_filecount to appendfile.
2663 36. Added control = no_multiline_responses to ACLs.
2665 37. There was a bug in the logic of the code that waits for the clock to tick
2666 in the case where the clock went backwards by a substantial amount such
2667 that the microsecond fraction of "now" was more than the microsecond
2668 fraction of "then" (but the whole seconds number was less).
2670 38. Added support for the libradius Radius client library this is found on
2671 FreeBSD (previously only the radiusclient library was supported).
2677 1. When certain lookups returned multiple values in the form name=value, the
2678 quoting of the values was not always being done properly. Specifically:
2679 (a) If the value started with a double quote, but contained no whitespace,
2681 (b) If the value contained whitespace other than a space character (i.e.
2682 tabs or newlines or carriage returns) it was not quoted.
2683 This fix has been applied to the mysql and pgsql lookups by writing a
2684 separate quoting function and calling it from the lookup code. The fix
2685 should probably also be applied to nisplus, ibase and oracle lookups, but
2686 since I cannot test any of those, I have not disturbed their existing code.
2688 2. A hit in the callout cache for a specific address caused a log line with no
2689 reason for rejecting RCPT. Now it says "Previous (cached) callout
2690 verification failure".
2692 3. There was an off-by-one bug in the queryprogram router. An over-long
2693 return line was truncated at 256 instead of 255 characters, thereby
2694 overflowing its buffer with the terminating zero. As well as fixing this, I
2695 have increased the buffer size to 1024 (and made a note to document this).
2697 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2698 when Exim is waiting for an SMTP response from a remote server, Exim
2699 restarts its select() call on the socket, thereby resetting its timeout.
2700 This is not a problem when such interrupts are rare. Somebody set up a cron
2701 job to run exiwhat every 2 minutes, which is less than the normal select()
2702 timeout (5 or 10 minutes). This meant that the select() timeout never
2703 kicked in because it was always reset. I have fixed this by comparing the
2704 time when an interrupt arrives with the time at the start of the first call
2705 to select(). If more time than the timeout has elapsed, the interrupt is
2706 treated as a timeout.
2708 5. Some internal re-factoring in preparation for the addition of Sieve
2709 extensions (by MH). In particular, the "personal" test is moved to a
2710 separate function, and given an option for scanning Cc: and Bcc: (which is
2711 not set for Exim filters).
2713 6. When Exim created an email address using the login of the caller as the
2714 local part (e.g. when creating a From: or Sender: header line), it was not
2715 quoting the local part when it contained special characters such as @.
2717 7. Installed new OpenBSD configuration files.
2719 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2720 try to make them clearer.
2722 9. Callout options, other than the timeout value, were being ignored when
2723 verifying sender addresses in header lines. For example, when using
2725 verify = header_sender/callout=no_cache
2727 the cache was (incorrectly) being used.
2729 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2730 only the Cygwin environment.
2732 11. When return_path_on_delivery was set as a log selector, if different remote
2733 addresses in the same message used different return paths and parallel
2734 remote delivery occurred, the wrong values would sometimes be logged.
2735 (Whenever a remote delivery process finished, the return path value from
2736 the most recently started remote delivery process was logged.)
2738 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2739 lines when AUTH and/or TLS are in use. This is the "received protocol"
2740 field. Exim used to use "asmtp" for authenticated SMTP, without any
2741 indication (in the protocol name) for TLS use. Now it follows the RFC and
2742 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2743 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2744 names appear in log lines as well as in Received: header lines.
2746 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2747 extensions, and comparison tests, and to fix some bugs.
2749 14. Changes to the "personal" filter test:
2751 (1) The test was buggy in that it was just doing the equivalent of
2752 "contains" tests on header lines. For example, if a user's address was
2753 anne@some.where, the "personal" test would incorrectly be true for
2755 To: susanne@some.where
2757 This test is now done by extracting each address from the header in turn,
2758 and checking the entire address. Other tests that are part of "personal"
2759 are now done using regular expressions (for example, to check local parts
2760 of addresses in From: header lines).
2762 (2) The list of non-personal local parts in From: addresses has been
2763 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2764 taken from the Sieve specification recommendations.
2766 (3) If the message contains any header line starting with "List-" it is
2767 treated as non-personal.
2769 (4) The test for "circular" in the Subject: header line has been removed
2770 because it now seems ill-conceived.
2772 15. Minor typos in src/EDITME comments corrected.
2774 16. Installed latest exipick from John Jetmore.
2776 17. If headers_add on a router specified a text string that was too long for
2777 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2778 of string_sprintf() is now avoided.
2780 18. $message_body_size was not set (it was always zero) when running the DATA
2781 ACL and the local_scan() function.
2783 19. For the "mail" command in an Exim filter, no default was being set for
2784 the once_repeat time, causing a random time value to be used if "once" was
2785 specified. (If the value happened to be <= 0, no repeat happened.) The
2786 default is now 0s, meaning "never repeat". The "vacation" command was OK
2787 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2788 (I found it when inspecting the code).
2790 20. There is now an overall timeout for performing a callout verification. It
2791 defaults to 4 times the callout timeout, which applies to individual SMTP
2792 commands during the callout. The overall timeout applies when there is more
2793 than one host that can be tried. The timeout is checked before trying the
2794 next host. This prevents very long delays if there are a large number of
2795 hosts and all are timing out (e.g. when the network connections are timing
2796 out). The value of the overall timeout can be changed by specifying an
2797 additional sub-option for "callout", called "maxwait". For example:
2799 verify = sender/callout=5s,maxwait=20s
2801 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2802 to the end before writing, but this should make it even safer).
2804 22. Exim was forgetting that it had advertised PIPELINING for the second and
2805 subsequent messages on an SMTP connection. It was also not resetting its
2806 memory on STARTTLS and an internal HELO.
2808 23. When Exim logs an SMTP synchronization error within a session, it now
2809 records whether PIPELINING has been advertised or not.
2811 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2812 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2813 rather than long int.
2815 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2817 26. Added the never_mail option to autoreply.
2823 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2824 crash if the getsockname() call failed; this can happen if a connection is
2825 closed very soon after it is established. The problem was simply in the
2826 order in which certain operations were done, causing Exim to try to write
2827 to the SMTP stream before it had set up the file descriptor. The bug has
2828 been fixed by making things happen in the correct order.
2834 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2835 before the connection was closed, thus losing the rejection response.
2837 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2838 some early Solaris releases, but causes trouble in current releases where
2839 socklen_t is defined.
2841 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2844 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2847 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2848 that releasing the top of it at the end releases what was used for sub-
2849 expansions (unless the block got too big). However, discard this block if
2850 the first thing is a variable or header, so that we can use its block when
2851 it is dynamic (useful for very large $message_headers, for example).
2853 6. Lookups now cache *every* query, not just the most recent. A new, separate
2854 store pool is used for this. It can be recovered when all lookup caches are
2855 flushed. Lookups now release memory at the end of their result strings.
2856 This has involved some general refactoring of the lookup sources.
2858 7. Some code has been added to the store_xxx() functions to reduce the amount
2859 of flapping under certain conditions.
2861 8. log_incoming_interface used to affect only the <= reception log lines. Now
2862 it causes the local interface and port to be added to several more SMTP log
2863 lines, for example "SMTP connection from", and rejection lines.
2865 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2867 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2869 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2870 could be overwritten at the end of the current message (or the start of a
2871 new message if it was set in a HELO ACL). The value is now preserved for
2872 the duration of the SMTP connection.
2874 12. If a transport had a headers_rewrite setting, and a matching header line
2875 contained an unqualified address, that address was qualified, even if it
2876 did not match any rewriting rules. The underlying bug was that the values
2877 of the flags that permit the existence of unqualified sender and recipient
2878 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2879 non-local messages, and by -bnq for local messages) were not being
2880 preserved with the message after it was received.
2882 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2883 "next input=" as part of the text comprising the host identity instead of
2884 the correct text. The code was using the same buffer for two different
2885 strings. However, depending on which order the printing function evaluated
2886 its arguments, the bug did not always show up. Under Linux, for example, my
2887 test suite worked just fine.
2889 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2890 doesn't work with some older versions of Perl. It has been changed to "my",
2891 which in any case is probably the better facility to use.
2893 15. A really picky compiler found some instances of statements for creating
2894 error messages that either had too many or two few arguments for the format
2897 16. The size of the buffer for calls to the DNS resolver has been increased
2898 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2899 for addresses that have a lot of PTR records. This alleviates a problem; it
2900 does not fully solve it.
2902 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2903 buffer now truncates the list and logs the incident, which is the same
2904 action as happens when Exim is looking up a host name and its aliases.
2905 Previously in this situation something unpredictable would happen;
2906 sometimes it was "internal error: store_reset failed".
2908 18. If a server dropped the connection unexpectedly when an Exim client was
2909 using GnuTLS and trying to read a response, the client delivery process
2910 crashed while trying to generate an error log message.
2912 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2913 string, for example:
2915 warn message = H1: something\nH2: something
2917 the text was added as a single header line from Exim's point of view
2918 though it ended up OK in the delivered message. However, searching for the
2919 second and subsequent header lines using $h_h2: did not work. This has been
2920 fixed. Similarly, if a system filter added multiple headers in this way,
2921 the routers could not see them.
2923 20. Expanded the error message when iplsearch is called with an invalid key to
2924 suggest using net-iplsearch in a host list.
2926 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2927 ACLs are no longer actually imposed (and a message to that effect is
2930 22. If a "gecos" field in a passwd entry contained escaped characters, in
2931 particular, if it contained a \" sequence, Exim got it wrong when building
2932 a From: or a Sender: header from that name. A second bug also caused
2933 incorrect handling when an unquoted " was present following a character
2934 that needed quoting.
2936 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2937 was not being matched caselessly.
2939 24. Arranged for all hyphens in the exim.8 source to be escaped with
2942 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2943 properly. Recipient callout cache records were still being keyed to include
2944 the sender, even when use_sender was set false. This led to far more
2945 callouts that were necessary. The sender is no longer included in the key
2946 when use_sender is false.
2948 26. Added "control = submission" modifier to ACLs.
2950 27. Added the ${base62d: operator to decode base 62 numbers.
2952 28. dnsdb lookups can now access SRV records.
2954 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2955 the configuration file.
2957 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2958 (-v) mode. This makes the output for a verbose queue run more intelligible.
2960 31. Added a use_postmaster feature to recipient callouts.
2962 32. Added the $body_zerocount variable, containing the number of binary zero
2963 bytes in the message body.
2965 33. The time of last modification of the "new" subdirectory is now used as the
2966 "mailbox time last read" when there is a quota error for a maildir
2969 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2971 35. Added +ignore_unknown as a special item in host lists.
2973 36. Code for decoding IPv6 addresses in host lists is now included, even if
2974 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2975 address was recognized as an IP address, but was then not correctly decoded
2976 into binary, causing unexpected and incorrect effects when compared with
2983 1. Very minor rewording of debugging text in manualroute to say "list of
2984 hosts" instead of "hostlist".
2986 2. If verify=header_syntax was set, and a header line with an unqualified
2987 address (no domain) and a large number of spaces between the end of the
2988 name and the colon was received, the reception process suffered a buffer
2989 overflow, and (when I tested it) crashed. This was caused by some obsolete
2990 code that should have been removed. The fix is to remove it!
2992 3. When running in the test harness, delay a bit after writing a bounce
2993 message to get a bit more predictability in the log output.
2995 4. Added a call to search_tidyup() just before forking a reception process. In
2996 theory, someone could use a lookup in the expansion of smtp_accept_max_
2997 per_host which, without the tidyup, could leave open a database connection.
2999 5. Added the variables $recipient_data and $sender_data which get set from a
3000 lookup success in an ACL "recipients" or "senders" condition, or a router
3001 "senders" option, similar to $domain_data and $local_part_data.
3003 6. Moved the writing of debug_print from before to after the "senders" test
3006 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3007 problems for message scanning, either using a data ACL, or using
3008 local_scan() because the Received: header was not generated till after they
3009 were called (in order to set the time as the time of reception completion).
3010 I have revised the way this works. The header is now generated after the
3011 body is received, but before the ACL or local_scan() are called. After they
3012 are run, the timestamp in the header is updated.
3018 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3019 before starting a queue runner without re-exec. This happened only when
3020 deliver_drop_privilege was set or when the Exim user was set to root. The
3021 effect of the bug was that timeouts during subsequent deliveries caused
3022 crashes instead of being properly handled. The handler is now left at its
3023 default (and expected) setting.
3025 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3026 message, again when deliver_drop_privilege is set or Exim is run as root.
3027 The bug described in (1) was not present in this case, but the tidying up
3028 of the other signals was missing. I have made the two cases consistent.
3030 3. The ignore_target_hosts setting on a manualroute router was being ignored
3031 for hosts that were looked up using the /MX notation.
3033 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3036 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3037 operated on the sender address. After changing the $sender_address to <>
3038 for the sender address verify, Exim was re-instated it as the original
3039 (before rewriting) address, but remembering that it had rewritten it, so it
3040 wasn't rewriting it again. This bug also had the effect of breaking the
3041 sender address verification caching when the sender address was rewritten.
3043 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3044 This has been changed so that if the ip literal address matches
3045 ignore_target_hosts, the router declines.
3047 7. Added expansion conditions match_domain, match_address, and match_local_
3048 part (NOT match_host).
3050 8. The placeholder for the Received: header didn't have a length field set.
3052 9. Added code to Exim itself and to exim_lock to test for a specific race
3053 condition that could lead to file corruption when using MBX delivery. The
3054 issue is with the lockfile that is created in /tmp. If this file is removed
3055 after a process has opened it but before that process has acquired a lock,
3056 there is the potential for a second process to recreate the file and also
3057 acquire a lock. This could lead to two Exim processes writing to the file
3058 at the same time. The added code performs the same test as UW imapd; it
3059 checks after acquiring the lock that its file descriptor still refers to
3060 the same named file.
3062 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3063 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3066 11. Added the smtp_active_hostname option. If used, this will typically be made
3067 to depend on the incoming interface address. Because $interface_address is
3068 not set up until the daemon has forked a reception process, error responses
3069 that can happen earlier (such as "too many connections") no longer contain
3072 12. If an expansion in a condition on a "warn" statement fails because a lookup
3073 defers, the "warn" statement is abandoned, and the next ACL statement is
3074 processed. Previously this caused the whole ACL to be aborted.
3076 13. Added the iplsearch lookup type.
3078 14. Added ident_timeout as a log selector.
3080 15. Added tls_certificate_verified as a log selector.
3082 16. Added a global option tls_require_ciphers (compare the smtp transport
3083 option of the same name). This controls incoming TLS connections.
3085 17. I finally figured out how to make tls_require_ciphers do a similar thing
3086 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3087 before starting the TLS session.
3089 18. Tabs are now shown as \t in -bP output.
3091 19. If the log selector return_path_on_delivery was set, Exim crashed when
3092 bouncing a message because it had too many Received: header lines.
3094 20. If two routers both had headers_remove settings, and the first one included
3095 a superfluous trailing colon, the final name in the first list and the
3096 first name in the second list were incorrectly joined into one item (with a
3097 colon in the middle).
3103 1. Added -C and -D options to the exinext utility, mainly to make it easier
3104 to include in the automated testing, but these could be helpful when
3105 multiple configurations are in use.
3107 2. The exinext utility was not formatting the output nicely when there was
3108 an alternate port involved in the retry record key, nor when there was a
3109 message id as well (for retries that were specific to a specific message
3110 and a specific host). It was also confused by IPv6 addresses, because of
3111 the additional colons they contain. I have fixed the IPv4 problem, and
3112 patched it up to do a reasonable job for IPv6.
3114 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3115 delivery, the log line now contains "pipelined" if PIPELINING was used.
3117 4. An SMTP transport process used to panic and die if the bind() call to set
3118 an explicit outgoing interface failed. This has been changed; it is now
3119 treated in the same way as a connect() failure.
3121 5. A reference to $sender_host_name in the part of a conditional expansion
3122 that was being skipped was still causing a DNS lookup. This no longer
3125 6. The def: expansion condition was not recognizing references to header lines
3126 that used bh_ and bheader_.
3128 7. Added the _cache feature to named lists.
3130 8. The code for checking quota_filecount in the appendfile transport was
3131 allowing one more file than it should have been.
3133 9. For compatibility with Sendmail, the command line option
3141 and sets the incoming protocol and host name (for trusted callers). The
3142 host name and its colon can be omitted when only the protocol is to be set.
3143 Note the Exim already has two private options, -pd and -ps, that refer to
3144 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3145 "s", but I don't think that's a major issue.
3147 10. A number of refactoring changes to the code, none of which should affect
3150 (a) The number of logging options was getting close to filling up the
3151 32-bit word that was used as a bit map. I have split them into two classes:
3152 those that are passed in the argument to log_write(), and those that are
3153 only ever tested independently outside of that function. These are now in
3154 separate 32-bit words, so there is plenty of room for expansion again.
3155 There is no change in the user interface or the logging behaviour.
3157 (b) When building, for example, log lines, the code previously used a
3158 macro that called string_cat() twice, in order to add two strings. This is
3159 not really sufficiently general. Furthermore, there was one instance where
3160 it was actually wrong because one of the argument was used twice, and in
3161 one call a function was used. (As it happened, calling the function twice
3162 did not affect the overall behaviour.) The macro has been replaced by a
3163 function that can join an arbitrary number of extra strings onto a growing
3166 (c) The code for expansion conditions now uses a table and a binary chop
3167 instead of a serial search (which was left over from when there were very
3168 few conditions). Also, it now recognizes conditions like "pam" even when
3169 the relevant support is not compiled in: a suitably worded error message is
3170 given if an attempt is made to use such a condition.
3172 11. Added ${time_interval:xxxxx}.
3174 12. A bug was causing one of the ddress fields not to be passed back correctly
3175 from remote delivery subprocesses. The field in question was not being
3176 subsequently used, so this caused to problems in practice.
3178 13. Added new log selectors queue_time and deliver_time.
3180 14. Might have fixed a bug in maildirsizefile handling that threw up
3181 "unexpected character" debug warnings, and recalculated the data
3182 unnecessarily. In any case, I expanded the warning message to give more
3185 15. Added the message "Restricted characters in address" to the statements in
3186 the default ACL that block characters like @ and % in local parts.
3188 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3189 Three changes have been made:
3191 (a) There was a serious bug; a negative response to MAIL caused the whole
3192 recipient domain to be cached as invalid, thereby blocking all messages
3193 to all local parts at the same domain, from all senders. This bug has
3194 been fixed. The domain is no longer cached after a negative response to
3195 MAIL if the sender used is not empty.
3197 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3200 (c) A new callout option, "use_sender" has been added for people who want
3201 the modified behaviour.
3207 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3210 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3211 indeed breaks things for older releases.
3213 3. Added additional logging to the case where there is a problem reading data
3214 from a filter that is running in a subprocess using a pipe, in order to
3215 try to track down a specific problem.
3217 4. Testing facility fudge: when running in the test harness and attempting
3218 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3219 getting "No route to host". Convert this to a timeout.
3221 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3224 6. Some OS don't have socklen_t but use size_t instead. This affects the
3225 fifth argument of getsockopt() amongst other things. This is now
3226 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3227 can be set for individual OS. I have set it for SunOS5, OSF1, and
3228 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3229 some earlier ones do not.
3231 7. Change 4.30/15 was not doing the test caselessly.
3233 8. The standard form for an IPv6 address literal was being rejected by address
3234 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3235 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3236 this, as well as the form without the "IPv6" on the front (but only when
3237 address literals are enabled, of course).
3239 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3241 10. Exim crashed if a message with an empty sender address specified by -f
3242 encountered a router with an errors_to setting. This could be provoked only
3243 by a command such as
3247 where an empty string was supplied; "<>" did not hit this bug.
3249 11. Installed PCRE release 4.5.
3251 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3252 remained set. It is now erased.
3254 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3255 times from message ids (which are base 36 rather than the normal 62).
3257 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3258 were being counted as actual protocol errors, and logged if the log
3259 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3260 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3261 and DATA following a set of rejected RCPTs do not count as protocol errors.
3262 In other words, Exim assumes they were pipelined, though this may not
3263 actually be the case. Of course, in all cases the client gets an
3264 appropriate error code.
3266 15. If a lookup fails in an ACL condition, a message about the failure may
3267 be available; it is used if testing the ACL cannot continue, because most
3268 such messages specify what the cause of the deferral is. However, some
3269 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3270 that caused an old message to be retained and used if a later statement
3271 caused a defer, replacing the real cause of the deferral.
3273 16. If an IP address had so many PTR records that the DNS lookup buffer
3274 was not large enough to hold them, Exim could crash while trying to process
3275 the truncated data. It now detects and logs this case.
3277 17. Further to 4.21/58, another change has been made: if (and only if) the
3278 first line of a message (the first header line) ends with CRLF, a bare LF
3279 in a subsequent header line has a space inserted after it, so as not to
3280 terminate the header.
3282 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3283 unnecessarily, used atoi() instead of strtol(), and didn't check the
3284 termination when getting file sizes from file names by regex.
3286 19. Completely re-implemented the support for maildirsize files, in the light
3287 of a number of problems with the previous contributed implementation
3288 (4.30/29). In particular:
3290 . If the quota is zero, the maildirsize file is maintained, but no quota is
3293 . If the maildir directory does not exist, it is created before any attempt
3294 to write a maildirsize file.
3296 . The quota value in the file is just a cache; if the quota is changed in
3297 the transport, the new value overrides.
3299 . A regular expression is available for excluding directories from the
3302 20. The autoreply transport checks the characters in options that define the
3303 message's headers; it allows continued headers, but it was checking with
3304 isspace() after an embedded newline instead of explicitly looking for a
3307 21. If all the "regular" hosts to which an address was routed had passed their
3308 expiry times, and had not reached their retry times, the address was
3309 bounced, even if fallback hosts were defined. Now Exim should go on to try
3312 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3313 equivalent code in the SMTP transport. Some hosts send humungous responses
3314 to HELO/EHLO, more than 1024 it seems.
3316 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3317 gives compiler warnings in some environments. I've now done it "properly",
3320 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3321 (because of problems with the built-in one) was declared to return uschar *
3322 instead of char *, causing compiler failure.
3324 25. Fixed a file descriptor leak when processing alias/forward files.
3326 26. Fixed a minor format string issue in dbfn.c.
3328 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3330 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3331 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3334 29. When a sender address is verified, it is cached, to save repeating the test
3335 when there is more than one recipient in a message. However, when the
3336 verification involves a callout, it is possible for different callout
3337 options to be set for different recipients. It is too complicated to keep
3338 track of this in the cache, so now Exim always runs a verification when a
3339 callout is required, relying on the callout cache for the optimization.
3340 The overhead is duplication of the address routing, but this should not be
3343 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3344 to be verified with callout=postmaster, and the main callout worked but the
3345 postmaster check failed, the verification correctly failed. However, if a
3346 subsequent RCPT command asked for sender verification *without* the
3347 postmaster check, incorrect caching caused this verification also to fail,
3350 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3351 it was not caching the DNS options (qualify_single, search_parents) that
3352 were used when the lookup failed. A subsequent lookup with different
3353 options therefore always gave the same answer, though there were cases
3354 where it should not have. (Example: a "domains = !$mx_any" option on a
3355 dnslookup router: the "domains" option is always processed without any
3356 widening, but the router might have qualify_single set.) Now Exim uses the
3357 cached value only when the same options are set.
3359 32. Added John Jetmore's "exipick" utility to the distribution.
3361 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3362 than a timeout (e.g. a certificate is required, and is not provided), an
3363 Exim server now closes the connection immediately. Previously it waited for
3364 the client to close - but if the client is SSL, it seems that they each
3365 wait for each other, leading to a delay before one of them times out.
3367 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3368 maintained 0.8.x compatibility because I don't think many are using it, and
3369 it is clearly obsolete.
3371 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3374 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3375 client certificate was expired. A simple patch fixes this, though I don't
3376 understand the full logic of why the verify callback is called multiple
3379 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3380 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3381 which causes problems with some clients (such as the Certicom SSL Plus
3382 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3383 disables the coutermeasure allowing Eudora to connect."
3385 38. Exim was not checking that a write() to a log file succeeded. This could
3386 lead to Bad Things if a log got too big, in particular if it hit a file
3387 size limit. Exim now panics and dies if it cannot write to a log file, just
3388 as it does if it cannot open a log file.
3390 39. Modified OS/Makefile-Linux so that it now contains
3392 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3394 The two -D definitions ensure that Exim is compiled with large file
3395 support, which makes it possible to handle log files that are bigger than
3398 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3399 instance) a domain was checked against a named list that involved a lookup,
3400 causing $domain_data to be set, then another domain was checked against the
3401 same list, then the first domain was re-checked, the value of $domain_data
3402 after the final check could be wrong. In particular, if the second check
3403 failed, it could be set empty. This bug probably also applied to
3406 41. The strip_trailing_dot option was not being applied to the address given
3407 with the -f command-line option.
3409 42. The code for reading a message's header from the spool was incrementing
3410 $received_count, but never initializing it. This meant that the value was
3411 incorrect (doubled) while delivering a message in the same process in which
3412 it was received. In the most common configuration of Exim, this never
3413 happens - a fresh exec is done - but it can happen when
3414 deliver_drop_privilege is set.
3416 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3417 it now includes up to 150 characters of the unexpected data in the log
3420 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3421 and building data strings. The size of both of these buffers was 10 000
3422 bytes - far larger than anybody would *ever* want, thought I. Needless to
3423 say, somebody hit the limit. I have increased the maximum line length to
3424 20 000 and the maximum data length of concatenated lines to 100 000. I have
3425 also fixed two bugs, because there was no checking on these buffers. Tsk,
3426 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3427 buffer is too small.
3429 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3430 lsearch lookups. Now it does.
3432 46. When parsing a route_list item in a manualroute router, a fixed-length
3433 buffer was used for the list of hosts. I made this 1024 bytes long,
3434 thinking that nobody would ever have a list of hosts that long. Wrong.
3435 Somebody had a whole pile of complicated expansion conditions, and the
3436 string was silently truncated, leading to an expansion error. It turns out
3437 that it is easier to change to an unlimited length (owing to other changes
3438 that have happened since this code was originally written) than to build
3439 structure for giving a limitation error. The length of the item that
3440 expands into the list of hosts is now unlimited.
3442 47. The lsearch lookup could not handle data where the length of text line was
3443 more than 4095 characters. Such lines were truncated, leading to shortened
3444 data being returned. It should now handle lines of any length.
3446 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3447 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3450 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3451 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3452 no longer happens in comment lines. A list of replacements is now placed
3453 at the head of all of the source files, except those whose only change is
3454 to replace PERL_COMMAND in the very first #! line.
3456 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3457 messages on the queue, with a bottom-up merge sort, using code contributed
3458 by Michael Haardt. This should make operations like -bp somewhat faster on
3459 large queues. It won't affect queue runners, except when queue_run_in_order
3462 51. Installed eximstats 1.31 in the distribution.
3464 52. Added support for SRV lookups to the dnslookup router.
3466 53. If an ACL referred to $message_body or $message_body_end, the value was not
3467 reset for any messages that followed in the same SMTP session.
3469 54. The store-handling optimization for building very long strings was not
3470 differentiating between the different store pools. I don't think this
3471 actually made any difference in practice, but I've tidied it.
3473 55. While running the routers to verify a sender address, $sender_address
3474 was still set to the sender address. This is wrong, because when routing to
3475 send a bounce to the sender, it would be empty. Therefore, I have changed
3476 it so that, while verifying a sender address, $sender_address is set to <>.
3477 (There is no change to what happens when verifying a recipient address.)
3479 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3480 target A or AAAA records (if not already returned) without resetting the
3481 qualify_single or search_parents options of the DNS resolver. These are
3482 inappropriate in this case because the targets of MX and SRV records must
3483 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3484 target that, when qualified, matched something in the local domain. These
3485 two options are now turned off when doing these lookups.
3487 57. It seems that at least some releases of Reiserfs (which does not have the
3488 concept of a fixed number of inodes) returns zero and not -1 for the
3489 number of available inodes. This interacted badly with check_spool_inodes,
3490 which assumed that -1 was the "no such thing" setting. What I have done is
3491 to check that the total number of inodes is greater than zero before doing
3492 the test of how many are available.
3494 58. When a "warn" ACL statement has a log_message modifier, the message is
3495 remembered, and not repeated. This is to avoid a lot of repetition when a
3496 message has many recipients that cause the same warning to be written.
3497 Howewer, Exim was preserving the list of already written lines for an
3498 entire SMTP session, which doesn't seem right. The memory is now reset if a
3499 new message is started.
3501 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3502 debugging output unless log_rewrite was also set.
3504 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3505 of (int)(handle) when we know that handle contains (void *)(-1).
3507 61. The Exim daemon panic-logs an error return when it closes the incoming
3508 connection. However "connection reset by peer" seems to be common, and
3509 isn't really an error worthy of noting specially, so that particular error
3512 62. When Exim is trying to find all the local interfaces, it used to panic and
3513 die if the ioctl to get the interface flags failed. However, it seems that
3514 on at least one OS (Solaris 9) it is possible to have an interface that is
3515 included in the list of interfaces, but for which you get a failure error
3516 for this call. This happens when the interface is not "plumbed" into a
3517 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3518 failure of the "get flags" call assumes that the interface is down.
3520 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3521 makes life easier for people who are doing arithmetic on fields extracted
3522 from dates, where you often get leading zeros that should not be
3523 interpreted as octal.
3525 64. Added qualify_domain to the redirect router, to override the global
3528 65. If a pathologically long header line contained very many addresses (the
3529 report of this problem mentioned 10 000) and each of them was rewritten,
3530 Exim could use up a very large amount of memory. (It kept on making new
3531 copies of the header line as it rewrote, and never released the old ones.)
3532 At the expense of a bit more processing, the header rewriting function has
3533 been changed so that it no longer eats memory in this way.
3535 66. The generation of the Received: header has been moved from the time that a
3536 message starts to be received, to the time that it finishes. The timestamp
3537 in the Received: header should now be very close to that of the <= log
3538 line. There are two side-effects of this change:
3540 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3541 logged header lines no longer include the local Received: line, because
3542 it has not yet been created. The same applies to a copy of the message
3543 that is returned to a non-SMTP sender when a message is rejected.
3545 (b) When a filter file is tested using -bf, no additional Received: header
3546 is added to the test message. After some thought, I decided that this
3549 This change does not affect the value of $received_for. It is still set
3550 after address rewriting, but before local_scan() is called.
3552 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3554 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3555 gave an unhelpful panic error message, and a defer error. I have managed to
3556 change this behaviour so that it now rejects any supplied certificate,
3557 which seems right, as the list of acceptable certificates is empty.
3559 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3560 gave an unhelpful defer error. I have not managed to make this reject any
3561 supplied certificates, but the error message it gives is "no certificate
3562 supplied", which is not helpful.
3564 70. exigrep's output now also includes lines that are not associated with any
3565 message, but which match the given pattern. Implemented by a patch from
3566 Martin Sluka, which also tidied up the Perl a bit.
3568 71. Recipient callout verification, like sender verification, was using <> in
3569 the MAIL FROM command. This isn't really the right thing, since the actual
3570 sender may affect whether the remote host accepts the recipient or not. I
3571 have changed it to use the actual sender in the callout; this means that
3572 the cache record is now keyed on a recipient/sender pair, not just the
3573 recipient address. There doesn't seem to be a real danger of callout loops,
3574 since a callout by the remote host to check the sender would use <>.
3575 [SEE ABOVE: changed after hitting problems.]
3577 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3578 temporary errors. However, in the case of such a code being given after
3579 the end of a data transmission (i.e. after ".") Exim was failing to write
3580 a retry record for the message. (Yes, there was some broken host that was
3581 actually sending 8xx at this point.)
3583 73. An unknown lookup type in a host list could cause Exim to panic-die when
3584 the list was checked. (An example that provoked this was putting <; in the
3585 middle of a list instead of at the start.) If this happened during a DATA
3586 ACL check, a -D file could be left lying around. This kind of configuration
3587 error no longer causes Exim to die; instead it causes a defer errror. The
3588 incident is still logged to the main and panic logs.
3590 74. Buglet left over from Exim 3 conversion. The message "too many messages
3591 in one connection" was written to the rejectlog but not the mainlog, except
3592 when address rewriting (yes!) was being logged.
3594 75. Added write_rejectlog option.
3596 76. When a system filter was run not as root (that is, when system_filter_user
3597 was set), the values of the $n variables were not being returned to the
3598 main process; thus, they were not subsequently available in the $sn
3601 77. Added +return_path_on_delivery log selector.
3603 78. A connection timeout was being treated differently from recipients deferred
3604 when testing hosts_max_try with a message that was older than the host's
3605 retry timeout. (The host should not be counted, thus allowing all hosts to
3606 be tried at least once before bouncing.) This may have been the cause of an
3607 occasionally reported bug whereby a message would remain on the queue
3608 longer than the retry timeout, but would be bounced if a delivery was
3609 forced. I say "may" because I never totally pinned down the problem;
3610 setting up timeout/retry tests is difficult. See also the next item.
3612 79. The ultimate address timeout was not being applied to errors that involved
3613 a combination of host plus message (for example, a timeout on a MAIL
3614 command). When an address resolved to a number of possible hosts, and they
3615 were not all tried for each delivery (e.g. because of hosts_max_try), a
3616 message could remain on the queue longer than the retry timeout.
3618 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3621 81. Fixed an obscure SMTP outgoing bug which required at least the following
3622 conditions: (a) there was another message waiting for the same server;
3623 (b) the server returned 5xx to all RCPT commands in the first message so
3624 that the message was not completed; (c) the server dropped the connection
3625 or gave a negative response to the RSET that Exim sends to abort the
3626 transaction. The observed case was a dropped connection after DATA that had
3627 been sent in pipelining mode. That is, the server had advertised PIPELINING
3628 but was not implementing it correctly. The effect of the bug was incorrect
3629 behaviour, such as trying another host, and this could lead to a crash.
3635 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3636 and daemon.c were passed as pointers to ints; they should have been
3637 pointers to socklen_t variables (which are typically unsigned ints).
3639 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3642 3. Fixed a really odd bug that affected only the testing scheme; patching a
3643 certain fixed string in the binary changed the value of another string that
3644 happened to be identical to the end of the original first string.
3646 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3647 name", it returns that address as the IP address. On some operating
3648 systems (e.g. Solaris), it also passes back the IP address string as the
3649 "host name". However, on others (e.g. Linux), it passes back an empty
3650 string. Exim wasn't checking for this, and was changing the host name to an
3651 empty string, assuming it had been canonicized.
3653 5. Although rare, it is permitted to have more than one PTR record for a given
3654 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3655 all the names associated with an address, because they do in Solaris.
3656 However, it seems that they do not in Linux for data that comes from the
3657 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3658 I found this out when I moved to a new Linux workstation and tried to run
3659 the Exim test suite.
3661 To get round this problem I have changed the code so that it now does its
3662 own call to the DNS to look up PTR records when searching for a host name.
3663 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3664 addresses that are only in /etc/hosts are still found.
3666 This behaviour is, however, controlled by an option called host_lookup_
3667 order, which defaults to "bydns:byaddr". If people want to use the other
3668 order, or indeed, just use one or the other means of lookup, they can
3669 specify it in this variable.
3671 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3672 some operating systems, this comes back from gethostbyaddr() as an empty
3673 string, and this is what Exim used to test for. However, it seems that in
3674 other systems, "." is yielded. Exim now tests for this case too.
3676 7. The values of check_spool_space and check_log_space are now held internally
3677 as a number of kilobytes instead of an absolute number of bytes. If a
3678 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3679 kilobyte. This means that much larger values can be stored.
3681 8. Exim monitor: an attempt to get the action menu when not actually pointing
3682 at a message produces an empty menu entitled "No message selected". This
3683 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3684 no entries in it ("Shell widget menu has zero width and/or height"). So I
3685 have added a single, blank menu entry in this case.
3687 9. Added ${quote_local_part.
3689 10. MIME decoding is now applied to the contents of Subject: header lines when
3692 11. Now that a reference to $sender_host_address automatically causes a reverse
3693 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3694 host lookup before query-style lookups in lists that might use this
3695 variable. This has therefore been abolished, and the "net-" prefix is no
3696 longer necessary for query-style lookups.
3698 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3699 have been a typo for LFLAGS, so it has been changed.
3701 13. The install script calls Exim with "-C /dev/null" in order to find the
3702 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3703 to be output. Howeve, since Exim outputs its version number before the
3704 error, it didn't break the script. It just looked ugly. I fixed this by
3705 always allowing "-C /dev/null" if the caller is root.
3707 14. Ignore overlarge ACL variable number when reading spool file - insurance
3708 against a later release with more variables having written the file.
3710 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3711 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3712 this, as well as the form without the "IPv6" on the front.
3714 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3715 OS/Makefile-Darwin file.
3717 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3718 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3720 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3721 variable. However, some OS use ints for inodes. I've added cast to long int
3722 to get rid of the compiler warning.
3724 19. I had forgotten to lock out "/../" in configuration file names when
3725 ALT_CONFIG_PREFIX was set.
3727 20. Routers used for verification do not need to specify transports. However,
3728 if such a router generated a host list, and callout was configured, Exim
3729 crashed, because it could not find a port number from the (non-existent)
3730 transport. It now assumes port 25 in this circumstance.
3732 21. Added the -t option to exigrep.
3734 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3735 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3736 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3737 them is set, LOOKUP_LSEARCH is forced.
3739 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3741 24. Added sender and host information to the "rejected by local_scan()" log
3742 line; previously there was no indication of these.
3744 25. Added .include_if_exists.
3746 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3747 Linux. It turns out that not all file systems support this. Apparently some
3748 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3749 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3750 not supported on the file descriptor, is now ignored when Exim is trying to
3751 sync a directory. This applies only to Linux.
3753 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3755 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3756 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3759 29. Added support for maildirsize files from supplied patch (modified a bit).
3761 30. The use of :fail: followed by an empty string could lead Exim to respond to
3762 sender verification failures with (e.g.):
3764 550 Verification failed for <xxx>
3765 550 Sender verify failed
3767 where the first response line was missing the '-' that indicates it is not
3768 the final line of the response.
3770 31. The loop for finding the name of the user that called Exim had a hardwired
3771 limit of 10; it now uses the value of finduser_retries, which is used for
3772 all other user lookups.
3774 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3777 33. Exim was neglecting to zero errno before one call of strtol() when
3778 expanding a string and expecting an integer value. On some systems this
3779 resulted in spurious "integer overflow" errors. Also, it was casting the
3780 result into an int without checking.
3782 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3783 did not work. The code looks as if it has *never* worked, though it appears
3784 to have been documented since at least releast 1.62. I have made it work.
3786 35. The "timeout_DNS" error in retry rules, also documented since at least
3787 1.62, also never worked. As it isn't clear exactly what this means, and
3788 clearly it isn't a major issue, I have abolished the feature by treating it
3789 as "timeout", and writing a warning to the main and panic logs.
3791 36. The display of retry rules for -brt wasn't always showing the error code
3794 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3795 timeout_connect_A, timeout_connect_MX.
3797 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3798 to the empty sender.
3800 39. The daemon was not analysing the content of -oX till after it had closed
3801 stderr and disconnected from the controlling terminal. This meant that any
3802 syntax errors were only noted on the panic log, and the return code from
3803 the command was 0. By re-arranging the code a little, I've made the
3804 decoding happen first, so such errors now appear on stderr, and the return
3805 code is 1. However, the actual setting up of the sockets still happens in
3806 the disconnected process, so errors there are still only recorded on the
3809 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3810 connections (as happens on some IP stacks) was logged at start up time as
3811 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3812 it from "IPv6 and IPv4", which means that two separate sockets are being
3815 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3816 says whether AF_INET or AF_INET6 was passed as an argument.
3818 42. Exiwhat output was messed up when time zones were included in log
3821 43. Exiwhat now gives more information about the daemon's listening ports,
3822 and whether -tls-on-connect was used.
3824 44. The "port" option of the smtp transport is now expanded.
3826 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3827 silently ignored. Now an error message is written to the main and panic
3830 46. There's a new ACL modifier called "logwrite" which writes to a log file
3831 as soon as it is encountered.
3833 47. Added $local_user_uid and $local_user_gid at routing time.
3835 48. Exim crashed when trying to verify a sender address that was being
3838 49. Exim was recognizing only a space character after ".include". It now also
3839 recognizes a tab character.
3841 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3842 extracting the relevant information from the specification. The man page no
3843 longer contains scrambled data for the -d option, and I've added a section
3844 at the front about calling Exim under different names.
3846 51. Added "extra_headers" argument to the "mail" command in filter files.
3848 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3851 53. Installed eximstats 1.29.
3853 54. Added transport_filter_timeout as a generic transport option.
3855 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3856 Cc: header lines. This was required by RFC 822, but it not required by RFC
3859 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3860 incoming messages that did not have them. Now it does so only if the
3861 message originates locally, that is, if there is no associated remote host
3862 address. When Resent- header lines are present, this applies to the Resent-
3863 lines rather than the non-Resent- lines.
3865 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3866 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3868 58. Messages for configuration errors now include the name of the main
3869 configuration file - useful now that there may be more than one file in a
3870 list (.included file names were always shown).
3872 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3873 for those rare installations that do not start the daemon as root or run it
3874 setuid root. I've cut out the call to initgroups() if the daemon is not
3877 60. The Exim user and group can now be bound into the binary as text strings
3878 that are looked up at the start of Exim's processing.
3880 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3882 62. Added $mailstore_basename variable.
3884 63. Installed patch to sieve.c from Michael Haardt.
3886 64. When Exim failed to open the panic log after failing to open the main log,
3887 the original message it was trying to log was written to stderr and debug
3888 output, but if they were not available (the usual case in production), it
3889 was lost. Now it is written to syslog before the two lines that record the
3890 failures to open the logs.
3892 65. Users' Exim filters run in subprocesses under the user's uid. It is
3893 possible for a "deliver" command or an alias in a "personal" command to
3894 provoke an address rewrite. If logging of address rewriting is configured,
3895 this fails because the process is not running as root or exim. There may be
3896 a better way of dealing with this, but for the moment (because 4.30 needs
3897 to be released), I have disabled address rewrite logging when running a
3898 filter in a non-root, non-exim process.
3904 1. The buildconfig auxiliary program wasn't quoting the value set for
3905 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3906 not defined. This bug was masked in 4.22 by the effect that was fixed in
3909 2. Some messages that were rejected after a message id was allocated were
3910 shown as "incomplete" by exigrep. It no longer does this for messages that
3911 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3913 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3914 have allow_domain_literals set, the ID did not get logged in the <= line.
3915 Domain literals are now always recognized in Message-ID: header lines.
3917 4. The first argument for a ${extract expansion item is the key name or field
3918 number. Leading and trailing spaces in this item were not being ignored,
3919 causing some misleading effects.
3921 5. When deliver_drop_privilege was set, single queue runner processes started
3922 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3923 same command in the process it spins off) were not dropping privilege.
3925 6. When the daemon running as "exim" started a queue runner, it always
3926 re-executed Exim in the spun-off process. This is a waste of effort when
3927 deliver_drop_privilege is set. The new process now just calls the
3928 queue-runner function directly.
3934 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3937 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3938 ignored. Though the use of -oP was forcing the writing of a pid file, it
3939 was always written to the default place.
3941 3. If the message "no IP address found for host xxxx" is generated during
3942 incoming verification, it is now followed by identification of the incoming
3943 connection (so you can more easily find what provoked it).
3945 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3947 5. Added some features to "harden" Exim a bit more against certain attacks:
3949 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3950 be put in Local/Makefile. This is like the never_users runtime option,
3951 but it cannot be overridden. The default setting is "root".
3953 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3954 prefix string with which any file named in a -C command line option
3957 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3958 is retained for -C and -D only if the caller of Exim is root. Without
3959 it, the exim user may also use -C and -D and retain privilege.
3961 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3962 command line option is disabled.
3964 6. Macro names set by the -D option must start with an upper case letter, just
3965 like macro names defined in the configuration file.
3967 7. Added "dereference=" facility to LDAP.
3969 8. Two instances of the typo "uknown" in the source files are fixed.
3971 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3972 the Configure-Makefile script screwed up while processing it.
3974 10. Incorporated PCRE 4.4.
3976 11. The SMTP synchronization check was not operating right at the start of an
3977 SMTP session. For example, it could not catch a HELO sent before the client
3978 waited for the greeting. There is now a check for outstanding input at the
3979 point when the greeting is written. Because of the duplex, asynchronous
3980 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3981 way, but not yet received, when the check is performed.
3983 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3984 on TCP/IP sockets, because this apparently causes some broken clients to
3987 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3988 unchanged) from the Cygwin maintainer.
3990 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3991 was supported instead of testing for mbx. Effectively a typo.
3993 15. The spa authenticator server code was not checking that the input it
3994 received was valid base64.
3996 16. The debug output line for the "set" modifier in ACLs was not showing the
3997 name of the variable that was being set.
3999 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4001 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4002 lookup on its own. Something else was needed to trigger the lookup. For
4003 example, a match in host_lookup or the need for a host name in a host list.
4004 Now, if $sender_host_name is referenced and the host name has not yet been
4005 looked up, a lookup is performed. If the lookup fails, the variable remains
4006 empty, and $host_lookup_failed is set to "1".
4008 19. Added "eqi" as a case-independent comparison operator.
4010 20. The saslauthd authentication condition could segfault if neither service
4011 nor realm was specified.
4013 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4014 error message that was logged was misleading, and incoming SMTP
4015 connections were dropped. The message is now more accurate, and temporary
4016 errors are given to SMTP connections.
4018 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4019 (except RSET) with a 421 error, until QUIT is received. However, it was
4020 failing to send a response to QUIT.
4022 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4023 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4024 ACL is now run after the helo_try_verify_hosts code.
4026 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4027 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4028 case-independent, so other case variants are also recognized). Apparently
4029 some systems use these upper case variants.
4031 25. If more than two messages were waiting for the same host, and a transport
4032 filter was specified for the transport, Exim sent two messages over the
4033 same TCP/IP connection, and then failed with "socket operation on non-
4034 socket" when it tried to send the third.
4036 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4038 27. The extern definition of crypt16() in expand.c was not being excluded when
4039 the OS had its own crypt16() function.
4041 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4042 as a preferred synonym for return_size_limit, both as an option and as an
4045 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4047 30. Changed the default configuration ACL to relax the local part checking rule
4048 for addresses that are not in any local domains. For these addresses,
4049 slashes and pipe symbols are allowed within local parts, but the sequence
4050 /../ is explicitly forbidden.
4052 31. SPA server authentication was not clearing the challenge buffer before
4055 32. log_message in a "warn" ACL statement was writing to the reject log as
4056 well as to the main log, which contradicts the documentation and doesn't
4057 seem right (because no rejection is happening). So I have stopped it.
4059 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4060 However, I am unable to do any testing of this.
4062 34. Fixed an infelicity in the appendfile transport. When checking directories
4063 for a mailbox, to see if any needed to be created, it was accidentally
4064 using path names with one or more superfluous leading slashes; tracing
4065 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4067 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4068 contents are added to the log line that is written for every discarded
4069 recipient. (Previously a log_message setting was ignored.)
4071 36. The ${quote: operator now quotes the string if it is empty.
4073 37. The install script runs exim in order to find its version number. If for
4074 some reason other than non-existence or emptiness, which it checks, it
4075 could not run './exim', it was installing it with an empty version number,
4076 i.e. as "exim-". This error state is now caught, and the installation is
4079 38. An argument was missing from the function that creates an error message
4080 when Exim fails to connect to the socket for saslauthd authentication.
4081 This could cause Exim to crash, or give a corrupted message.
4083 39. Added isip, isip4, and isip6 to ${if conditions.
4085 40. The ACL variables $acl_xx are now saved with the message, and can be
4086 accessed later in routers, transports, and filters.
4088 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4089 strings in the file are not string-expanded.
4091 42. If a MAIL command specified a SIZE value that was too large to fit into an
4092 int variable, the check against message_size_limit failed. Such values are
4093 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4094 day this will have to be increased, but I don't think I want to be around
4095 when emails are that large.
4102 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4103 iconv() is not standard in FreeBSD.
4105 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4106 IPv6 enabled. The observed symptom was a segmentation fault on return from
4107 the function os_common_find_running_interfaces() in src/os.c.
4109 3. In the check_special_case() function in daemon.c I had used "errno" as an
4110 argument name, which causes warnings on some systems. This was basically a
4111 typo, since it was named "eno" in the comments!
4113 4. The code that waits for the clock to tick (at a resolution of some fraction
4114 of a second) so as to ensure message-id uniqueness was always waiting for
4115 at least one whole tick, when it could have waited for less. [This is
4116 almost certainly not relevant at current processor speeds, where it is
4117 unlikely to ever wait at all. But we try to future-proof.]
4119 5. The function that sleeps for a time interval that includes fractions of a
4120 second contained a race. It did not block SIGALRM between setting the
4121 timer, and suspending (a couple of lines later). If the interval was short
4122 and the sigsuspend() was delayed until after it had expired, the suspension
4123 never ended. On busy systems this could lead to processes getting stuck for
4126 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4127 process, before it forks any delivery processes. The open lookup caching
4128 mechanism meant that the open file or database connection was passed into
4129 the delivery process. The problem was that delivery processes always tidy
4130 up cached lookup data. This could cause a problem for the next delivery
4131 process started by the queue runner, because the external queue runner
4132 process does not know about the closure. So the next delivery process
4133 still has data in the lookup cache. In the case of a file lookup, there was
4134 no problem because closing a file descriptor in a subprocess doesn't affect
4135 the parent. However, if the lookup was caching a connection to a database,
4136 the connection was closed, and the second delivery process was likely to
4137 see errors such as "PGSQL: query failed: server closed the connection
4138 unexpectedly". The problem has been fixed by closing all cached lookups
4139 in a queue runner before running a delivery process.
4141 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4142 seem to have the "const" qualifier which it has on other OS. I've
4145 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4146 *of the same type* (client or server) with the same public name that an
4147 error should be diagnosed.
4149 9. When Exim looked up a host name for an IP address, but failed to find the
4150 original IP address when looking up the host name (a safety check), it
4151 output the message "<ip address> does not match any IP for NULL", which was
4152 confusing, to say the least. The bug was that the host name should have
4153 appeared instead of "NULL".
4155 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4156 user that is built into the binary, and the -C or -D options is used, root
4157 privilege is dropped before the configuration file is read. In addition,
4158 logging is switched to stderr instead of the normal log files. If the
4159 configuration then re-defines the Exim user, the unprivileged environment
4160 is probably not what is expected, so Exim logs a panic warning message (but
4163 However, if deliver_drop_privilege is set, the unprivileged state may well
4164 be exactly what is intended, so the warning has been cut out in that case,
4165 and Exim is allowed to try to write to its normal log files.
4171 1. smtp_return_error_details was not giving details for temporary sender
4172 or receiver verification errors.
4174 2. Diagnose a configuration error if two authenticators have the same public
4177 3. Exim used not to create the message log file for a message until the first
4178 delivery attempt. This could be confusing when incoming messages were held
4179 for policy or load reasons. The message log file is now created at the time
4180 the message is received, and an initial "Received" line is written to it.
4182 4. The automatically generated man page for command line options had a minor
4183 bug that caused no ill effects; however, a more serious problem was that
4184 the procedure for building the man page automatically didn't always
4185 operate. Consequently, release 4.20 contains an out-of-date version. This
4186 shouldn't happen again.
4188 5. When building Exim with embedded Perl support, the script that builds the
4189 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4190 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4192 6. The freeze_tell option was not being used for messages that were frozen on
4193 arrival, either by an ACL or by local_scan().
4195 7. Added the smtp_incomplete_transaction log selector.
4197 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4198 was accepting AUTH without a new EHLO.
4200 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4201 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4204 10. Logging of TCP/IP connections (when configured) now happens in the main
4205 daemon process instead of the child process, so that the TCP/IP connection
4206 count is more accurate (but it can never be perfect).
4208 11. The use of "drop" in a nested ACL was not being handled correctly in the
4209 outer ACL. Now, if condition failure induced by the nested "drop" causes
4210 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4211 or "require"), the connection is dropped.
4213 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4214 that yield "discard" can now be used with an "accept" or a "discard" verb,
4215 but an error is generated for any others (because I can't see a useful way
4216 to define what should happen).
4218 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4219 are now processed in the same way as lines in the Exim configuration file.
4220 In particular, continuation lines are supported.
4222 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4224 15. Added -ti meaning -t -i.
4226 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4227 domains, and warn by logging if others are found.
4229 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4230 returned from GIFCONF when Exim is trying to find the list of interfaces on
4231 a host. The code in os.c has been modified to copy each ifreq to an aligned
4232 structure in all cases.
4234 Also, in some cases, the returned ifreq's were being copied to a 'struct
4235 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4236 means the last couple of bytes of an IPv6 address could be chopped if the
4237 ifreq contained only a normal sockaddr (14 bytes storage).
4239 18. Named domain lists were not supported in the hosts_treat_as_local option.
4240 An entry such as +xxxx was not recognized, and was treated as a literal
4243 19. Ensure that header lines added by a DATA ACL are included in the reject log
4244 if the ACL subsequently rejects the message.
4246 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4247 MD5 (which is deprecated).
4249 21. When testing a filter file using -bf, Exim was writing a message when it
4250 took the sender from a "From " line in the message, but it was not doing so
4251 when it took $return_path from a Return-Path: header line. It now does.
4253 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4254 with a valid header line field name (a series of printing characters
4255 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4257 23. Changed "disc" in the source to "disk" to conform to the documentation and
4258 the book and for uniformity.
4260 24. Ignore Sendmail's -Ooption=value command line item.
4262 25. When execve() failed while trying to run a command in a pipe transport,
4263 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4264 could be confused with a return value of 69 from the command itself. This
4265 has been changed to 127, the value the shell returns if it is asked to run
4266 a non-existent command. The wording for the related log line suggests a
4267 non-existent command as the problem.
4269 26. If received_header_text expands to an empty string, do not add a Received:
4270 header line to the message. (Well, it adds a token one on the spool, but
4271 marks it "old" so that it doesn't get used or transmitted.)
4273 27. Installed eximstats 1.28 (addition of -nt option).
4275 28. There was no check for failure on the call to getsockname() in the daemon
4276 code. This can fail if there is a shortage of resources on the system, with
4277 ENOMEM, for example. A temporary error is now given on failure.
4279 29. Contrary to the C standard, it seems that in some environments, the
4280 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4281 program. Exim now does this explicitly; it affects the formatting of
4282 timestamps using strftime().
4284 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4285 complaints. I've now initialized all the variables, to avoid this.
4287 32. Header lines added by a system filter were not being "seen" during
4288 transport-time rewrites.
4290 33. The info_callback() function passed to OpenSSL is set up with type void
4291 (*)(SSL *, int, int), as described somewhere. However, when calling the
4292 function (actually a macro) that sets it up, the type void(*)() is
4293 expected. I've put in a cast to prevent warnings from picky compilers.
4295 34. If a DNS black list lookup found a CNAME record, but there were no A
4296 records associated with the domain it pointed at, Exim crashed.
4298 35. If a DNS black list lookup returned more than one A record, Exim ignored
4299 all but the first. It now scans all returned addresses if a particular IP
4300 value is being sought. In this situation, the contents of the
4301 $dnslist_value variable are a list of all the addresses, separated by a
4304 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4305 to accept a host name and all its aliases if the forward lookup for any of
4306 them yielded the IP address of the incoming connection. Now it accepts only
4307 those names whose forward lookup yields the correct IP address. Any other
4308 names are discarded. This closes a loophole whereby a rogue DNS
4309 administrator could create reverse DNS records to break through a
4310 wildcarded host restriction in an ACL.
4312 37. If a user filter or a system filter that ran in a subprocess used any of
4313 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4314 the wrong values were passed to the pipe command ($thisaddress had the
4315 value of $0, $0 had the value of $1, etc). This bug was introduced by
4316 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4318 38. Improved the line breaking for long SMTP error messages from ACLs.
4319 Previously, if there was no break point between 40 and 75 characters, Exim
4320 left the rest of the message alone. Two changes have been made: (a) I've
4321 reduced the minimum length to 35 characters; (b) if it can't find a break
4322 point between 35 and 75 characters, it looks ahead and uses the first one
4323 that it finds. This may give the occasional overlong line, but at least the
4324 remaining text gets split now.
4326 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4327 file descriptors might be low, and that setting 1000 would always raise it.
4328 It turns out that in some environments, the limit is already over 1000 and
4329 that lowering it causes trouble. So now Exim takes care not to decrease it.
4331 40. When delivering a message, the value of $return_path is set to $sender_
4332 address at the start of routing (routers may change the value). By an
4333 oversight, this default was not being set up when an address was tested by
4334 -bt or -bv, which affected the outcome if any router or filter referred to
4337 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4338 log only when "message" or "log_message" are set. However, if one of the
4339 conditions was an address verification, or a call to a nested ACL, the
4340 messages generated by the underlying test were being passed through. This
4341 no longer happens. The underlying message is available in $acl_verify_
4342 message for both "message" and "log_message" expansions, so it can be
4343 passed through if needed.
4345 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4346 new expansion $bh_ to give the encoded byte string without charset
4347 translation. Translation happens only if iconv() is available; HAVE_ICONV
4348 indicates this at build time. HEADERS_CHARSET gives the charset to
4349 translate to; headers_charset can change it in the configuration, and
4350 "headers charset" can change it in an individual filter file.
4352 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4353 that creates RFC 2047 encoded "words" labels them as that charset instead
4354 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4355 expansion operator; (ii) when Exim creates a From: line for a local
4356 message; (iii) when a header line is rewritten to include a "phrase" part.
4358 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4359 buggy, causing it to skip the first lines of messages whose message ID
4360 ended in 'D'. This would not have bitten before Exim release 4.14, because
4361 message IDs were unlikely to end in 'D' before then. The effect was to have
4362 incorrect size information for certain domains.
4364 45. #include "config.h" was missing at the start of the crypt16.c module. This
4365 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4368 46. If there was a timeout during a "random" callout check, Exim treated it as
4369 a failure of the random address, and carried on sending RSET and the real
4370 address. If the delay was just some slowness somewhere, the response to the
4371 original RCPT would be taken as a response to RSET and so on, causing
4372 mayhem of various kinds.
4374 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4375 when I implemented it. It didn't allow for the fact that some option values
4376 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4377 the right test for positive values.
4379 48. Domain names in DNS records are case-independent. Exim always looks them up
4380 in lower case. Some resolvers return domain names in exactly the case they
4381 appear in the zone file, that is, they may contain uppercase letters. Not
4382 all resolvers do this - some return always lower case. Exim was treating a
4383 change of case by a resolver as a change of domain, similar to a widening
4384 of a domain abbreviation. This triggered its re-routing code and so it was
4385 trying to route what was effectively the same domain again. This normally
4386 caused routing to fail (because the router wouldn't handle the domain
4387 twice). Now Exim checks for this case specially, and just changes the
4388 casing of the domain that it ultimately uses when it transmits the message
4391 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4394 50. If a filter generated a file delivery with a non-absolute name (possible if
4395 no home directory exists for the router), the forbid_file option was not
4398 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4399 the existing equality matching.
4401 52. Exim was using ints instead of ino_t variables in some places where it was
4402 dealing with inode numbers.
4404 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4405 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4406 called TMPDIR, and if it finds it is different, it changes its value.
4408 54. The smtp_printf() function is now made available to local_scan() so
4409 additional output lines can be written before returning. There is also an
4410 smtp_fflush() function to enable the detection of a dropped connection.
4411 The variables smtp_input and smtp_batched_input are exported to
4414 55. Changed the default runtime configuration: the message "Unknown user"
4415 has been removed from the ACL, and instead placed on the localuser router,
4416 using the cannot_route_message feature. This means that any verification
4417 failures that generate their own messages won't get overridden. Similarly,
4418 the "Unrouteable address" message that was in the ACL for unverifiable
4419 relay addresses has also been removed.
4421 56. Added hosts_avoid_esmtp to the smtp transport.
4423 57. The exicyclog script was not checking for the esoteric option
4424 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4425 will work only if exicyclog is run under the appropriate euid.
4427 58. Following a discussion on the list, the rules by which Exim recognises line
4428 endings on incoming messages have been changed. The -dropcr and drop_cr
4429 options are now no-ops, retained only for backwards compatibility. The
4430 following line terminators are recognized: LF CRLF CR. However, special
4431 processing applies to CR:
4433 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4434 nor a local message in the state where . is a terminator.
4436 (ii) If a bare CR is encountered in a header line, an extra space is added
4437 after the line terminator so as not to end the header. The reasoning
4438 behind this is that bare CRs in header lines are most likely either
4439 to be mistakes, or people trying to play silly games.
4441 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4442 was being incorrectly given as 18 bytes larger than it should have been.
4443 This is a VOB (very old bug).
4445 60. This may never have affected anything current, but just in case it has:
4446 When the local host is found other than at the start of a list of hosts,
4447 the local host, those with the same MX, and any that follow, are discarded.
4448 When the list in question was part of a longer list of hosts, the following
4449 hosts (not currently being processed) were also being discarded. This no
4450 longer happens. I'm not sure if this situation could ever has previously
4453 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4456 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4457 header. This is something that is recommended in a new Internet Draft, and
4458 is something that is documented as being done by Sendmail. There are two
4459 possible values. For messages generated by the autoreply transport, Exim
4462 Auto-Submitted: auto-replied
4464 whereas for all other generated messages (e.g. bounces) it adds
4466 Auto-Submitted: auto-generated
4468 63. The "personal" condition in filters now includes a test for the
4469 Auto-Submitted: header. If it contains the string "auto-" the message it
4470 not considered personal.
4472 64. Added rcpt_include_affixes as a generic transport option.
4474 65. Added queue_only_override (default true).
4476 66. Added the syslog_duplication option.
4478 67. If what should have been the first header line of a message consisted of
4479 a space followed by a colon, Exim was mis-interpreting it as a header line.
4480 It isn't of course - it is syntactically invalid and should therefore be
4481 treated as the start of the message body. The misbehaviour could have
4482 caused a number of strange effects, including loss of data in subsequent
4483 header lines, and spool format errors.
4485 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4486 client host had authenticated. This control can now be exercised by an ACL
4487 for more flexibility.
4489 69. By default, callouts do not happen when testing with -bh. There is now a
4490 variant, -bhc, which does actually run the callout code, including
4491 consulting and updating the callout cache.
4493 70. Added support for saslauthd authentication, courtesy of Alexander
4496 71. If statvfs() failed on the spool or log directories while checking their
4497 size for availability, Exim confusingly gave the error "space shortage".
4498 Furthermore, in debugging mode it crashed with a floating point exception.
4499 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4500 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4501 serious problem, Exim now writes to the main and panic logs when this
4502 happens, with details of the failure. It then refuses to accept the
4503 incoming message, giving the message "spool directory problem" or "log
4504 directory problem" with a 421 code for SMTP messages.
4506 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4507 0, 1, and 2 exist, because some OS complain for execs without them (see
4508 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4509 descriptors. However, the code omitted to check that the open succeeded,
4510 causing mysterious errors if for some reason the permissions on /dev/null
4511 got screwed. Now Exim writes a message to the main and panic logs, and
4512 bombs out if it can't open /dev/null.
4514 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4515 interact so that it is all more flexible. It is supposed to remain
4516 backwards compatible. Also added extra_local_interfaces.
4518 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4519 to bomb out with an assertion failure - to the client this appears as a
4520 connection drop. This problem occurs in the part of the code that was taken
4521 from the Samba project. Fortunately, the assertion is in a very simple
4522 function, so I have fixed this by reproducing the function inline in the
4523 one place where it is called, and arranging for authentication to fail
4524 instead of killing the process with assert().
4526 75. The SPA client code was not working when the server requested OEM rather
4527 than Unicode encoding.
4529 76. Added code to make require_files with a specific uid setting more usable in
4530 the case where statting the file as root fails - usually a non-root-mounted
4531 NFS file system. When this happens and the failure is EACCES, Exim now
4532 forks a subprocess and does the per-uid checking as the relevant uid.
4534 77. Added process_log_path.
4536 78. If log_file_path was not explicitly set, a setting of check_log_space or
4537 check_log_inodes was ignored.
4539 79. If a space check for the spool or log partitions fails, the incident is now
4540 logged. Of course, in the latter case the data may get lost...
4542 80. Added the %p formatting code to string_format() so that it can be used to
4543 print addresses in debug_print(). Adjusted all the address printing in the
4544 debugging in store.c to use %p rather than %d.
4546 81. There was a concern that a line of code in smtp_in.c could overflow a
4547 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4548 initially expressed, the concern was not well-founded, because trailing
4549 spaces are removed early. However, if the trailing spaces were followed by
4550 a NULL, they did not get removed, so the overflow was possible. Two fixes
4553 (a) I re-wrote the offending code in a cleaner fashion.
4554 (b) If an incoming SMTP command contains a NULL character, it is rejected
4557 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4558 runs initgroups(), so that if the Exim user is in any additional groups,
4559 they will be used during message reception.
4565 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob