1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.452 2007/01/15 15:59:22 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
16 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
17 fixed by 4.65/MH/01 (is this a record?) are fixed:
19 (i) An empty string was always treated as zero by the numeric comparison
20 operators. This behaviour has been restored.
22 (ii) It is documented that the numeric comparison operators always treat
23 their arguments as decimal numbers. This was broken in that numbers
24 starting with 0 were being interpreted as octal.
26 While fixing these problems I realized that there was another issue that
27 hadn't been noticed. Values of message_size_limit (both the global option
28 and the transport option) were treated as octal if they started with 0.
29 The documentation was vague. These values are now always treated as
30 decimal, and I will make that clear in the documentation.
36 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
37 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
40 MH/01 Don't check that the operands of numeric comparison operators are
41 integers when their expansion is in "skipping" mode (fixes bug
42 introduced by 4.64-PH/07).
44 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
45 child addresses, Exim now panics and dies. Previously, because the count
46 is held in a short int, deliveries were likely to be lost. As such a
47 large number of recipients for a single message is ridiculous
48 (performance will be very, very poor), I have chosen to impose a limit
49 rather than extend the field.
55 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
56 leftover -K file (the existence of which was triggered by #402).
57 While we were at it, introduced process PID as part of the -K
58 filename. This should rule out race conditions when creating
61 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
62 processing considerably. Previous code took too long for large mails,
63 triggering a timeout which in turn triggers #401.
65 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
66 in the DK code in transports.c. sendfile() is not really portable,
67 hence the _LINUX specificness.
69 TF/01 In the add_headers option to the mail command in an Exim filter,
70 there was a bug that Exim would claim a syntax error in any
71 header after the first one which had an odd number of characters
74 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
75 callout verification, Exim cached a "reject" for the entire domain. This
76 is correct for most verifications, but it is not correct for a recipient
77 verification with use_sender or use_postmaster set, because in that case
78 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
79 case of MAIL FROM:<> rejection from other early rejections (e.g.
80 rejection of HELO). When verifying a recipient using a non-null MAIL
81 address, the cache is ignored if it shows MAIL FROM:<> rejection.
82 Whatever the result of the callout, the value of the domain cache is
83 left unchanged (for any other kind of callout, getting as far as trying
84 RCPT means that the domain itself is ok).
86 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
89 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
90 manifest itself as EPIPE rather than ECONNECT. When tidying away a
91 session, the daemon ignores ECONNECT errors and logs others; it now
92 ignores EPIPE as well.
94 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
95 (quoted-printable decoding).
97 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
98 later the small subsequent patch to fix an introduced bug.
100 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
102 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
104 PH/08 An error is now given if message_size_limit is specified negative.
106 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
107 to be given (somewhat) arbitrary names.
109 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
112 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
113 miscellaneous code fixes
115 PH/10 Added the log_reject_target ACL modifier to specify where to log
118 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
119 hostname. This is wrong, because it relates to the incoming message (and
120 probably the interface on which it is arriving) and not to the outgoing
121 callout (which could be using a different interface). This has been
122 changed to use the value of the helo_data option from the smtp transport
123 instead - this is what is used when a message is actually being sent. If
124 there is no remote transport (possible with a router that sets up host
125 addresses), $smtp_active_hostname is used.
127 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
128 tweaks were necessary in order to get it to work (see also 21 below):
129 (a) The code assumed that strncpy() returns a negative number on buffer
130 overflow, which isn't the case. Replaced with Exim's string_format()
132 (b) There were several signed/unsigned issues. I just did the minimum
133 hacking in of casts. There is scope for a larger refactoring.
134 (c) The code used strcasecmp() which is not a standard C function.
135 Replaced with Exim's strcmpic() function.
136 (d) The code set only $1; it now sets $auth1 as well.
137 (e) A simple test gave the error "authentication client didn't specify
138 service in request". It would seem that Dovecot has changed its
139 interface. Fortunately there's a specification; I followed it and
140 changed what the client sends and it appears to be working now.
142 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
145 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
146 address A is aliased to B and C, where B exists and C does not. Without
147 -v the output is "A verified" because verification stops after a
148 successful redirection if more than one address is generated. However,
149 with -v the child addresses are also verified. Exim was outputting "A
150 failed to verify" and then showing the successful verification for C,
151 with its parentage. It now outputs "B failed to verify", showing B's
152 parentage before showing the successful verification of C.
154 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
155 look up a TXT record in a specific list after matching in a combined
158 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
159 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
160 they consult the DNS. I had assumed they would set it the way they
161 wanted; and indeed my experiments on Linux seem to show that in some
162 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
163 To be on the safe side, however, I have now made the interface to
164 host_find_byname() similar to host_find_bydns(), with an argument
165 containing the DNS resolver options. The host_find_byname() function now
166 sets these options at its start, just as host_find_bydns() does. The smtp
167 transport options dns_qualify_single and dns_search_parents are passed to
168 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
169 of host_find_byname() use the default settings of RES_DEFNAMES
170 (qualify_single) but not RES_DNSRCH (search_parents).
172 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
173 spool_read_header() do less string testing, by means of a preliminary
174 switch on the second character of optional "-foo" lines. (This is
175 overdue, caused by the large number of possibilities that now exist.
176 Originally there were few.) While I was there, I also converted the
177 str(n)cmp tests so they don't re-test the leading "-" and the first
178 character, in the hope this might squeeze out yet more improvement.
180 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
181 flag allowing group syntax was set by the header_syntax check but not
182 turned off, possible causing trouble later; (2) The flag was not being
183 set at all for the header_verify test, causing "group"-style headers to
184 be rejected. I have now set it in this case, and also caused header_
185 verify to ignore an empty address taken from a group. While doing this, I
186 came across some other cases where the code for allowing group syntax
187 while scanning a header line wasn't quite right (mostly, not resetting
188 the flag correctly in the right place). These bugs could have caused
189 trouble for malformed header lines. I hope it is now all correct.
191 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
192 with the "reply" argument non-NULL. The code, however (which originally
193 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
194 but it didn't always do it. This confused somebody who was copying the
195 code for some other use. I have removed all the tests.
197 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
198 feature that was used to support insecure browsers during the U.S. crypto
199 embargo. It requires special client support, and Exim is probably the
200 only MTA that supported it -- and would never use it because real RSA is
201 always available. This code has been removed, because it had the bad
202 effect of slowing Exim down by computing (never used) parameters for the
203 RSA_EXPORT functionality.
205 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
206 authenticator to fail if there's a tab character in the incoming data
207 (there should never be unless someone is messing about, as it's supposed
208 to be base64-encoded). Also added, on Timo's advice, the "secured" option
209 if the connection is using TLS or if the remote IP is the same as the
210 local IP, and the "valid-client-cert option" if a client certificate has
213 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
214 authenticators. This can be used for authorization after authentication
215 succeeds. (In the case of plaintext, it servers for both authentication
218 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
219 if any retry times were supplied.
221 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
222 connection, where there is no client IP address to check. In this
223 situation, the verify now always succeeds.
225 PH/25 Applied John Jetmore's -Mset patch.
227 PH/26 Added -bem to be like -Mset, but loading a message from a file.
229 PH/27 In a string expansion for a processed (not raw) header when multiple
230 headers of the same name were present, leading whitespace was being
231 removed from all of them, but trailing whitespace was being removed only
232 from the last one. Now trailing whitespace is removed from each header
233 before concatenation. Completely empty headers in a concatenation (as
236 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
237 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
239 PH/29 [Removed. This was a change that I later backed out, and forgot to
240 correct the ChangeLog entry (that I had efficiently created) before
241 committing the later change.]
243 PH/30 Exim was sometimes attempting to deliver messages that had suffered
244 address errors (4xx response to RCPT) over the same connection as other
245 messages routed to the same hosts. Such deliveries are always "forced",
246 so retry times are not inspected. This resulted in far too many retries
247 for the affected addresses. The effect occurred only when there were more
248 hosts than the hosts_max_try setting in the smtp transport when it had
249 the 4xx errors. Those hosts that it had tried were not added to the list
250 of hosts for which the message was waiting, so if all were tried, there
251 was no problem. Two fixes have been applied:
253 (i) If there are any address or message errors in an SMTP delivery, none
254 of the hosts (tried or untried) are now added to the list of hosts
255 for which the message is waiting, so the message should not be a
256 candidate for sending over the same connection that was used for a
257 successful delivery of some other message. This seems entirely
258 reasonable: after all the message is NOT "waiting for some host".
259 This is so "obvious" that I'm not sure why it wasn't done
260 previously. Hope I haven't missed anything, but it can't do any
261 harm, as the worst effect is to miss an optimization.
263 (ii) If, despite (i), such a delivery is accidentally attempted, the
264 routing retry time is respected, so at least it doesn't keep
265 hammering the server.
267 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
268 in ${readsocket because some servers need this prod.
270 PH/32 Added some extra debug output when updating a wait-xxx database.
272 PH/33 The hint "could be header name not terminated by colon", which has been
273 given for certain expansion errors for a long time, was not being given
274 for the ${if def:h_colon_omitted{... case.
276 PH/34 The spec says: "With one important exception, whenever a domain list is
277 being scanned, $domain contains the subject domain." There was at least
278 one case where this was not true.
280 PH/35 The error "getsockname() failed: connection reset by peer" was being
281 written to the panic log as well as the main log, but it isn't really
282 panic-worthy as it just means the connection died rather early on. I have
283 removed the panic log writing for the ECONNRESET error when getsockname()
286 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
287 runs only) independently of the message's sender address. This meant
288 that, if the 4xx error was in fact related to the sender, a different
289 message to the same recipient with a different sender could confuse
290 things. In particualar, this can happen when sending to a greylisting
291 server, but other circumstances could also provoke similar problems.
292 I have changed the default so that the retry time for these errors is now
293 based a combination of the sender and recipient addresses. This change
294 can be overridden by setting address_retry_include_sender=false in the
297 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
298 remote server are returned as part of bounce messages. This was not
299 happening for LMTP over a pipe (the lmtp transport), but now it is the
300 same for both kinds of LMTP.
302 PH/38 Despite being documented as not happening, Exim was rewriting addresses
303 in header lines that were in fact CNAMEs. This is no longer the case.
305 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
306 and queue runs started by the daemon processed all messages. This has
307 been fixed so that -R and -S can now usefully be given with -q<time>.
309 PH/40 Import PCRE release 6.7 (fixes some bugs).
311 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
313 PH/42 Give an error if -q is specified more than once.
315 PH/43 Renamed the variables $interface_address and $interface_port as
316 $received_ip_address and $received_port, to make it clear that these
317 values apply to message reception, and not to the outgoing interface when
318 a message is delivered. (The old names remain recognized, of course.)
320 PH/44 There was no timeout on the connect() call when using a Unix domain
321 socket in the ${readsocket expansion. There now is.
323 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
324 be meaningful with "accept".
326 SC/01 Eximstats V1.43
327 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
329 SC/02 Eximstats V1.44
330 Use a glob alias rather than an array ref in the generated
331 parser. This improves both readability and performance.
333 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
334 Collect SpamAssassin and rejection statistics.
335 Don't display local sender or destination tables unless
336 there is data to show.
337 Added average volumes into the top table text output.
339 SC/04 Eximstats V1.46
340 Collect data on the number of addresses (recipients)
341 as well as the number of messages.
343 SC/05 Eximstats V1.47
344 Added 'Message too big' to the list of mail rejection
345 reasons (thanks to Marco Gaiarin).
347 SC/06 Eximstats V1.48
348 Mainlog lines which have GMT offsets and are too short to
349 have a flag are now skipped.
351 SC/07 Eximstats V1.49 (Alain Williams)
352 Added the -emptyok flag.
354 SC/08 Eximstats V1.50
355 Fixes for obtaining the IP address from reject messages.
357 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
358 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
359 whitesspace changes from 4.64-PH/27
361 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
364 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
365 are found, allow negative numbers in numeric criteria)
367 JJ/06 exipick.20061117.2, added new $message_body_missing variable
369 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
370 to match changes made in 4.64-PH/43
372 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
374 PH/47 Put in an explicit test for a DNS lookup of an address record where the
375 "domain" is actually an IP address, and force a failure. This locks out
376 those revolvers/nameservers that support "A-for-A" lookups, in
377 contravention of the specifications.
379 PH/48 When a host name was looked up from an IP address, and the subsequent
380 forward lookup of the name timed out, the host name was left in
381 $sender_host_name, contrary to the specification.
383 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
384 restricted to single-key lookups, Exim was not diagnosing an error if
385 * or *@ was used with a query-style lookup.
387 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
389 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
390 long ago, but noone interested enough thought of it. Let's just say that
391 the "1.1" means that there are some new functions that weren't there at
392 some point in the past.
394 PH/51 Error processing for expansion failure of helo_data from an smtp
395 transport during callout processing was broken.
397 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
398 tested/used via the -bh/-bhc/-bs options.
400 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
401 bug, fixed in subsequent PCRE releases).
403 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
404 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
406 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
412 SC/01 Use a glob alias rather than an array ref in eximstats generated
413 parser. This improves both readability and performance.
415 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
416 Don't display local sender or destination tables in eximstats unless
417 there is data to show.
418 Added average volumes into the eximstats top table text output.
420 SC/03 Collect data on the number of addresses (recipients) as well
421 as the number of messages in eximstats.
423 TF/01 Correct an error in the documentation for the redirect router. Exim
424 does (usually) call initgroups() when daemonizing.
426 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
427 with consistent privilege compared to when running as a daemon.
429 TF/03 Note in the spec that $authenticated_id is not set for local
430 submissions from trusted users.
432 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
433 Thanks to Dean Brooks <dean@iglou.com> for the patch.
435 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
436 by adding some example configuration directives to the default
437 configuration file. A little bit of work is required to uncomment the
438 directives and define how usernames and passwords are checked, but
439 there is now a framework to start from.
441 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
442 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
443 without this. I don't know how relevant this is to other LDAP libraries.
445 PH/02 Add the verb name to the "unknown ACL verb" error.
447 PH/03 Magnus Holmgren's patch for filter_prepend_home.
449 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
451 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
452 directory not expanded when it should be if an expanded home directory
453 was set for the address (which is overridden by the transport).
455 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
458 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
459 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
460 because it is too late at that time, and has no effect.
462 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
463 security issue with \' (bugzilla #107). I could not use the
464 PQescapeStringConn() function, because it needs a PGconn value as one of
467 PH/08 When testing addresses using -bt, indicate those final addresses that
468 are duplicates that would not cause an additional delivery. At least one
469 person was confused, thinking that -bt output corresponded to deliveries.
470 (Suppressing duplicates isn't a good idea as you lose the information
471 about possibly different redirections that led to the duplicates.)
473 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
474 systems where poll() doesn't work, in particular OS X.
476 PH/10 Added more information to debugging output for retry time not reached.
478 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
479 operations in malware.c.
481 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
484 PH/13 If write_rejectlog was set false when logging was sent to syslog with
485 syslog_duplication set false, log lines that would normally be written
486 both the the main log and to the reject log were not written to syslog at
489 PH/14 In the default configuration, change the use of "message" in ACL warn
490 statements to "add_header".
492 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
493 not followed by a command (e.g. "seen endif").
495 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
496 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
499 PH/17 Added extra conditions to the default value of delay_warning_condition
503 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
504 { match{$h_precedence:}{(?i)bulk|list|junk} } \
505 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
508 The Auto-Submitted: and various List- headers are standardised, whereas I
509 don't think Precedence: ever was.
511 PH/18 Refactored debugging code in route_finduser() to show more information,
512 in particular, the error code if getpwnam() issues one.
514 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
515 This is apparently needed in addition to the PH/07 change above to avoid
516 any possible encoding problems.
518 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
519 but not after initializing Perl.
521 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
522 output them only if debugging. By default they are written stderr,
523 apparently, which is not desirable.
525 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
528 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
531 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
533 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
534 authenticated or an ident call has been made. Suppress the default
535 values for $authenticated_id and $authenticated_sender (but permit -oMai
536 and -oMas) when testing with -bh.
538 PH/24 Re-jigged the order of the tests in the default configuration so that the
539 tests for valid domains and recipients precede the DNS black list and CSA
540 tests, on the grounds that those ones are more expensive.
542 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
543 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
544 This bug exists in every version of Exim that I still have, right back to
547 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
548 However, an attempt to turn on case-sensitivity in a regex key by
549 including (?-i) didn't work because the subject string was already
550 lowercased, and the effects were non-intuitive. It turns out that a
551 one-line patch can be used to allow (?-i) to work as expected.
557 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
558 other effects) broke the use of negated acl sub-conditions.
560 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
563 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
564 "Deny" causes Exim to reject the incoming connection with a 554 error.
565 Unfortunately, if there is a major crisis, such as a disk failure,
566 tcp-wrappers gives "deny", whereas what one would like would be some
567 kind of temporary error. A kludge has been added to help with this.
568 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
569 554 error is used if errno is still zero or contains ENOENT (which occurs
570 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
573 PH/03 Add -lutil to the default FreeBSD LIBS setting.
575 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
576 errors. Otherwise a message that provokes a temporary error (when other
577 messages do not) can cause a whole host to time out.
579 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
580 addresses were routed directly to files or pipes from a redirect router.
581 File deliveries just didn't batch; pipe deliveries might have suffered
584 PH/06 A failure to get a lock for a hints database would erroneously always say
585 "Failed to get write lock", even when it was really a read lock.
587 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
588 of 0600. This has been changed to use the value of the lockfile_mode
589 option (which defaults to 0600).
591 PH/08 Applied small patch from the Sieve maintainer.
593 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
594 folder from quota calculations, a direct delivery into this folder messed
595 up the contents of the maildirsize file. This was because the regex was
596 used only to exclude .Trash (or whatever) when the size of the mailbox
597 was calculated. There was no check that a delivery was happening into an
598 excluded directory. This bug has been fixed by ignoring all quota
599 processing for deliveries into excluded directories.
601 PH/10 Added the maildirfolder_create_regex option to appendfile.
607 PH/01 The code for finding all the local interface addresses on a FreeBSD
608 system running IPv6 was broken. This may well have applied to all BSD
609 systems, as well as to others that have similar system calls. The broken
610 code found IPv4 interfaces correctly, but gave incorrect values for the
611 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
612 that it would not match correctly against @[] and not recognize the IPv6
615 PH/02 The ipliteral router was not recognizing addresses of the form user@
616 [ipv6:....] because it didn't know about the "ipv6:" prefix.
618 PH/03 Added disable_ipv6.
620 PH/04 Changed $reply_address to use the raw form of the headers instead of the
621 decoded form, because it is most often used to construct To: headers
622 lines in autoreplies, and the decoded form may well be syntactically
623 invalid. However, $reply_address has leading white space removed, and all
624 newlines turned into spaces so that the autoreply transport does not
627 PH/05 If group was specified without a user on a router, and no group or user
628 was specified on a transport, the group from the router was ignored.
630 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
631 for visible compile-time settings that can be used to change these
632 numbers, for those that want even more. Backwards compatibility with old
633 spool files has been maintained. However, going back to a previous Exim
634 release will lost any variables that are in spool files.
636 PH/07 Two small changes when running in the test harness: increase delay when
637 passing a TCP/IP connection to a new process, in case the original
638 process has to generate a bounce, and remove special handling of
639 127.0.0.2 (sic), which is no longer necessary.
641 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
642 be the same on different OS.
644 PH/09 Moved a debug statement in filter processing to avoid a race problem when
647 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
648 whether --show-vars was specified or not
650 JJ/02 exipick: Added support for new ACL variable spool format introduced
653 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
654 syntactically invalid From: or Reply-to: line, and a filter used this to
655 generate an autoreply, and therefore failed to obtain an address for the
656 autoreply, Exim could try to deliver to a non-existent relative file
657 name, causing unrelated and misleading errors. What now happens is that
658 it logs this as a hard delivery error, but does not attempt to create a
661 PH/11 The exinext utility has a -C option for testing purposes, but although
662 the given file was scanned by exinext itself; it wasn't being passed on
663 when Exim was called.
665 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
666 an end-of-file indication when reading a command response.
668 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
669 compiled. In many other places in Exim, IPv6 addresses are always
670 recognized, so I have changed this. It also means that IPv4 domain
671 literals of the form [IPV4:n.n.n.n] are now always recognized.
673 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
674 used if the router is not running as root, for example, when verifying at
675 ACL time, or when using -bh. The debugging output from this situation was
676 non-existent - all you got was a failure to exec. I have made two
679 (a) Failures to set uid/gid, the current directory, or a process leader
680 in a subprocess such as that created by queryprogram now generate
681 suitable debugging ouput when -d is set.
683 (b) The queryprogram router detects when it is not running as root,
684 outputs suitable debugging information if -d is set, and then runs
685 the subprocess without attempting to change uid/gid.
687 PH/15 Minor change to Makefile for building test_host (undocumented testing
690 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
691 additional section of a DNS packet that returns MX or SRV records.
692 Instead, it always explicitly searches for A/AAAA records. This avoids
693 major problems that occur when a DNS server includes only records of one
694 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
695 fixed another bug: if SRV records were looked up and the corresponding
696 address records were *not* found in the additional section, the port
697 values from the SRV records were lost.
699 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
700 using the correct key (the original address) when searching the retry
701 rules in order to find which one to use for generating the retry hint.
703 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
704 adding the default one. Similarly, if it contains a Reply-To: header, the
705 errors_reply_to option, if set, is not used.
707 PH/19 When calculating a retry time, Exim used to measure the "time since
708 failure" by looking at the "first failed" field in the retry record. Now
709 it does not use this if it is later than than the arrival time of the
710 message. Instead it uses the arrival time. This makes for better
711 behaviour in cases where some deliveries succeed, thus re-setting the
712 "first failed" field. An example is a quota failure for a huge message
713 when small messages continue to be delivered. Without this change, the
714 "time since failure" will always be short, possible causing more frequent
715 delivery attempts for the huge message than are intended.
716 [Note: This change was subsequently modified - see PH/04 for 4.62.]
718 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
719 $1, $2, $3) because the numerical variables can be reset during some
720 expansion items (e.g. "match"), thereby losing the authentication data.
722 PH/21 Make -bV show the size of off_t variables so that the test suite can
723 decide whether to run tests for quotas > 2G.
725 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
726 mailbox_size, and mailbox_filecount in the appendfile transport. If a
727 filecount value is greater than 2G or if a quota value is greater than 2G
728 on a system where the size of off_t is not greater than 4, a panic error
731 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
732 never match. The debug and -bh output now contains an explicit error
733 message indicating a malformed IPv4 address or mask.
735 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
736 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
739 PH/25 Do not write to syslog when running in the test harness. The only
740 occasion when this arises is a failure to open the main or panic logs
741 (for which there is an explicit test).
743 PH/26 Added the /no_tell option to "control=freeze".
745 PH/27 If a host name lookup failed very early in a connection, for example, if
746 the IP address matched host_lookup and the reverse lookup yielded a name
747 that did not have a forward lookup, an error message of the form "no IP
748 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
749 could be logged. Now it outputs the IP address instead of "NULL".
751 PH/28 An enabling patch from MH: add new function child_open_exim2() which
752 allows the sender and the authenticated sender to be set when
753 submitting a message from within Exim. Since child_open_exim() is
754 documented for local_scan(), the new function should be too.
756 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
757 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
758 results in an empty string is now treated as unset.
760 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
762 PH/31 Added sender_verify_fail logging option.
764 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
765 needed by RFC 822 but not by RFC 2822 was commented out. I have now
766 tidied the source and removed it altogether.
768 PH/33 When a queue run was abandoned because the load average was too high, a
769 log line was always written; now it is written only if the queue_run log
770 selector is set. In addition, the log line for abandonment now contains
771 information about the queue run such as the pid. This is always present
772 in "start" and "stop" lines but was omitted from the "abandon" line.
774 PH/34 Omit spaces between a header name and the colon in the error message that
775 is given when verify = headers_syntax fails (if there are lots of them,
776 the message gets confusing).
778 PH/35 Change the default for dns_check_names_pattern to allow slashes within
779 names, as there are now some PTR records that contain slashes. This check
780 is only to protect against broken name servers that fall over on strange
781 characters, so the fact that it applies to all lookups doesn't matter.
783 PH/36 Now that the new test suite is complete, we can remove some of the
784 special code in Exim that was needed for the old test suite. For example,
785 sorting DNS records because real resolvers return them in an arbitrary
786 order. The new test suite's fake resolver always returns records in the
789 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
790 bounces) except when queue_only is set, to avoid logging races between
791 the different processes.
793 PH/38 Panic-die if .include specifies a non-absolute path.
795 PH/39 A tweak to the "H" retry rule from its user.
797 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
798 a label. They prevented compilation on older perls.
800 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
801 a warning to be raised on newish perls.
803 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
804 on queue. Changes to match documented behaviour of showing count of
805 messages matching specified criteria.
807 PH/40 Changed the default ident timeout from 30s to 5s.
809 PH/41 Added support for the use of login_cap features, on those BSD systems
810 that have them, for controlling the resources used by pipe deliveries.
812 PH/42 The content-scanning code uses fopen() to create files in which to put
813 message data. Previously it was not paying any attention to the mode of
814 the files. Exim runs with umask(0) because the rest of the code creates
815 files with open(), and sets the required mode explicitly. Thus, these
816 files were ending up world-writeable. This was not a big issue, because,
817 being within the spool directory, they were not world-accessible. I have
818 created a function called modefopen, which takes an additional mode
819 argument. It sets umask(777), creates the file, chmods it to the required
820 mode, then resets the umask. All the relevant calls to fopen() in the
821 content scanning code have been changed to use this function.
823 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
824 to 24 hours. This avoids potential overflow problems when processing G
825 and H retry rules. I suspect nobody ever tinkers with this value.
827 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
829 PH/45 When the plaintext authenticator is running as a client, the server's
830 challenges are checked to ensure they are valid base64 strings. By
831 default, the authentication attempt is cancelled if an invalid string is
832 received. Setting client_ignore_invalid_base64 true ignores these errors.
833 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
834 they are received. Thus, the responses can be made to depend on the
835 challenges. If an invalid string is ignored, an empty string is placed in
838 PH/46 Messages that are created by the autoreply transport now contains a
839 References: header, in accordance with RFCs 2822 and 3834.
841 PH/47 Added authenticated_sender_force to the smtp transport.
843 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
845 PH/49 Installed latest patch from the Sieve maintainer.
847 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
848 was also set, the appendfile transport was unnecessarily scanning a
849 directory of message files (e.g. for maildir delivery) to find the count
850 of files (along with the size), even though it did not need this
851 information. It now does the scan only if it needs to find either the
852 size of the count of files.
854 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
856 PH/52 Two bugs concerned with error handling when the smtp transport is
859 (i) Exim was not creating retry information for temporary errors given
860 for individual recipients after the DATA command when the smtp transport
861 was used in LMTP mode. This meant that they could be retried too
862 frequently, and not timed out correctly.
864 (ii) Exim was setting the flag that allows error details to be returned
865 for LMTP errors on RCPT commands, but not for LMTP errors for individual
866 recipients that were returned after the DATA command.
868 PH/53 This is related to PH/52, but is more general: for any failing address,
869 when detailed error information was permitted to be returned to the
870 sender, but the error was temporary, then after the final timeout, only
871 "retry timeout exceeded" was returned. Now it returns the full error as
872 well as "retry timeout exceeded".
874 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
875 do this, and (what is worse) MTAs that accept it.
877 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
878 will now be deprecated.
880 PH/56 New os.c-cygwin from the Cygwin maintainer.
882 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
883 formats (previously only available in exim formats via -bpr, -bpru,
884 and -bpra. Now also available in native and exiqgrep formats)
886 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
887 with very large, slow to parse queues
889 JJ/08 exipick: added ! as generic prefix to negate any criteria format
891 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
893 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
894 responses to authentication challenges, though it was showing the
895 challenges; (ii) I've removed the CR characters from the debug output for
898 PH/58 Allow for the insertion of a newline as well as a space when a string
899 is turned into more than one encoded-word during RFC 2047 encoding. The
900 Sieve code now uses this.
902 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
903 data_4xx, lost_connection, tls_required.
905 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
906 message was being sent as an SMTP response.
908 PH/61 Add -l and -k options to exicyclog.
910 PH/62 When verifying, if an address was redirected to one new address, so that
911 verification continued, and the new address failed or deferred after
912 having set something in $address_data, the value of $address_data was not
913 passed back to the ACL. This was different to the case when no
914 redirection occurred. The value is now passed back in both cases.
916 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
917 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
918 use login_cap.h, so on its own it isn't the distinguishing feature. The
919 new name refers directly to the setclassresources() function.
921 PH/65 Added configuration files for NetBSD3.
923 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
925 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
926 is preferred over IPv4.
928 PH/68 The bounce_return_message and bounce_return_body options were not being
929 honoured for bounces generated during the reception of non-SMTP messages.
930 In particular, this applied to messages rejected by the ACL. This bug has
931 been fixed. However, if bounce_return_message is true and bounce_return_
932 body is false, the headers that are returned for a non-SMTP message
933 include only those that have been read before the error was detected.
934 (In the case of an ACL rejection, they have all been read.)
936 PH/69 The HTML version of the specification is now built in a directory called
937 spec_html instead of spec.html, because the latter looks like a path with
938 a MIME-type, and this confuses some software.
940 PH/70 Catch two compiler warnings in sieve.c.
942 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
943 function verify_get_ident() calls ip_connect() to connect a socket, but
944 if the "connect()" function timed out, ip_connect() used to close the
945 socket. However, verify_get_ident() also closes the socket later, and in
946 between Exim writes to the log, which may get opened at this point. When
947 the socket was closed in ip_connect(), the log could get the same file
948 descriptor number as the socket. This naturally causes chaos. The fix is
949 not to close the socket in ip_connect(); the socket should be closed by
950 the function that creates it. There was only one place in the code where
951 this was missing, in the iplookup router, which I don't think anybody now
952 uses, but I've fixed it anyway.
954 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
955 well as to direct DNS lookups. Otherwise the handling of names in host
956 lists is inconsistent and therefore confusing.
962 PH/01 Two changes to the default runtime configuration:
964 (1) Move the checks for relay_from_hosts and authenticated clients from
965 after to before the (commented out) DNS black list checks.
967 (2) Add control=submission to the relay_from_hosts and authenticated
968 clients checks, on the grounds that messages accepted by these
969 statements are most likely to be submissions.
971 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
973 (1) Generate an error if the third argument for the ${prvs expansion is
976 (2) Treat a missing third argument of ${prvscheck as if it were an empty
979 (3) Reset the variables that are obtained from the first argument of
980 ${prvscheck and used in the second argument before leaving the code,
981 because their memory is reclaimed, so using them afterwards may do
984 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
985 one (it's much easier than Tom thought :-).
987 (5) Because of (4), we can now allow for the use of $prvscheck_result
988 inside the third argument.
990 PH/03 For some reason, the default setting of PATH when running a command from
991 a pipe transport was just "/usr/bin". I have changed it to
994 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
995 anything to be listed in the output from -bV.
997 PH/05 When a filter generated an autoreply, the entire To: header line was
998 quoted in the delivery log line, like this:
1000 => >A.N.Other <ano@some.domain> <original@ddress> ...
1002 This has been changed so that it extracts the operative address. There
1003 may be more than one such address. If so, they are comma-separated, like
1006 => >ano@some.domain,ona@other.domain <original@ddress> ...
1008 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1009 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1010 not being looked up in the rDNS to get a host name, Exim was showing the
1011 IP address twice in Received: lines, even though the IP addresses were
1012 identical. For example:
1014 Received: from [1.2.3.4] (helo=[1.2.3.4])
1016 However, if the real host name was known, it was omitting the HELO data
1017 if it matched the actual IP address. This has been tidied up so that it
1018 doesn't show the same IP address twice.
1020 PH/07 When both +timestamp and +memory debugging was on, the value given by
1021 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1022 called by the debug printing, thereby overwriting the timestamp buffer.
1023 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1025 PH/08 When the original message was included in an autoreply transport, it
1026 always said "this is a copy of the message, including all the headers",
1027 even if body_only or headers_only was set. It now gives an appropriate
1030 PH/09 Applied a patch from the Sieve maintainer which:
1032 o fixes some comments
1033 o adds the (disabled) notify extension core
1034 o adds some debug output for the result of if/elsif tests
1035 o points to the current vacation draft in the documentation
1036 and documents the missing references header update
1040 o fixes a bug in processing the envelope test (when testing
1041 multiple envelope elements, the last element determinted the
1044 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1045 Electronic Mail") by including:
1047 Auto-submitted: auto-generated
1049 in the messages that it generates (bounce messages and others, such as
1050 warnings). In the case of bounce messages for non-SMTP mesages, there was
1051 also a typo: it was using "Auto_submitted" (underscore instead of
1052 hyphen). Since every message generated by Exim is necessarily in response
1053 to another message, thes have all been changed to:
1055 Auto-Submitted: auto-replied
1057 in accordance with these statements in the RFC:
1059 The auto-replied keyword:
1061 - SHOULD be used on messages sent in direct response to another
1062 message by an automatic process,
1064 - MUST NOT be used on manually-generated messages,
1066 - MAY be used on Delivery Status Notifications (DSNs) and Message
1067 Disposition Notifications (MDNs),
1069 - MUST NOT be used on messages generated by automatic or periodic
1070 processes, except for messages which are automatic responses to
1073 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1074 to the default Received: header definition.
1076 PH/12 Added log selector acl_warn_skipped (default on).
1078 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1079 variables because (a) they are in the wrong storage pool and (b) even if
1080 they were copied, it wouldn't work properly because of the caching.
1082 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1083 checking when decoding. Apparently there are clients that generate
1084 overlong encoded strings. Why am I not surprised?
1086 PH/15 If the first argument of "${if match_address" was not empty, but did not
1087 contain an "@" character, Exim crashed. Now it writes a panic log message
1088 and treats the condition as false.
1090 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1092 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1093 extension "envelope-auth". The code is finished and in agreement with
1094 other implementations, but there is no documentation so far and in fact,
1095 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1096 not changing the active code.
1098 Print executed "if" and "elsif" statements when debugging is used. This
1099 helps a great deal to understand what a filter does.
1101 Document more things not specified clearly in RFC3028. I had all this
1102 sorted out, when out of a sudden new issues came to my mind. Oops."
1104 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1107 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1108 canonical form (as documented). However, after a host name lookup from
1109 the IP address, check_host() was doing a simple string comparison with
1110 addresses acquired from the DNS when checking that the found name did
1111 have the original IP as one of its addresses. Since any found IPv6
1112 addresses are likely to be in abbreviated form, the comparison could
1113 fail. Luckily, there already exists a function for doing the comparison
1114 by converting both addresses to binary, so now that is used instead of
1115 the text comparison.
1117 PH/20 There was another similar case to PH/19, when a complete host name was
1118 given in a host list; looking up its IP address could give an abbreviated
1119 form, whereas the current host's name might or might not be abbreviated.
1120 The same fix has been applied.
1126 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1127 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1130 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1131 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1133 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1135 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1136 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1137 Also, for "Auto-Submitted", treat anything other than "no" as
1138 non-personal, in accordance with RFC 3834. (Previously it treated
1139 anything starting "auto-" as non-personal.)
1141 TF/01 The control=submission/name=... option had a problem with syntax
1142 errors if the name included a slash character. The /name= option
1143 now slurps the rest of the string, so it can include any characters
1144 but it must come last in the list of options (after /sender_retain
1147 PH/05 Some modifications to the interface to the fake nameserver for the new
1155 TK/01 Added the "success_on_redirect" address verification option. See
1156 NewStuff for rationale and an example.
1158 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1160 PH/02 Patch to exigrep to allow it to work on syslog lines.
1162 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1163 fread() to skip over the body file's header line, because in Cygwin the
1164 header line is locked and is inaccessible.
1166 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1167 co-exist for some time) to make it clear that it is the Exim ID that is
1168 referenced, not the Message-ID: header line.
1170 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1171 string_format() function, because snprintf() does not exist on all
1174 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1175 ${stat: expansion item.
1177 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1178 protocol synchronization error", to keep the pedants happy.
1180 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1181 well as for IRIX systems, when gcc is being used. See the host.c source
1184 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1186 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1189 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1190 transport and to the smtp transport in LMTP mode.
1192 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1194 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1195 run a filter in a subprocess. This could lead to confusion in subsequent
1196 lookups in the parent process. There should also be a search_tidyup() at
1197 the end of the subprocess.
1199 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1200 only if the host matched helo_try_verify_hosts, which caused the
1201 verification to occur when the EHLO/HELO command was issued. The ACL just
1202 tested the remembered result. Now, if a previous verification attempt has
1203 not happened, "verify = helo" does it there and then.
1205 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1207 TK/03 Fix log output including CR from clamd.
1209 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1210 exist provoked a memory error which could cause a segfault.
1212 PH/15 Installed PCRE 6.2
1214 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1216 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1217 of the problem. Specifically, suggested +O2 rather than +O1 for the
1220 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1222 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1223 record, the port was not correctly logged when the outgoing_port log
1224 selector was set (it logged the transort's default port).
1226 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1227 fallback_hosts, and "hosts" in the smtp transport.
1229 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1230 host errors such as "Connection refused".
1232 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1233 authentication with radiusclient 0.4.9:
1235 - Error returned from rc_read_config was caught wrongly
1236 - Username/password not passed on to radius server due to wrong length.
1238 The presumption is that some radiusclient API changes for 4.51/PH/17
1239 were not taken care of correctly. The code is still untested by me (my
1240 Linux distribution still has 0.3.2 of radiusclient), but it was
1241 contributed by a Radius user.
1243 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1244 expanding the "port" option of the smtp transport.
1246 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1247 while reading a MIME header. Thanks to Tom Hughes for a patch.
1249 PH/24 Include config.h inside local_scan.h so that configuration settings are
1252 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1253 that in an ACL for RCPT (for example), you can examine exactly what was
1256 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1257 commands, but it was not correctly comparing the address with the actual
1258 client host address. Thus, it would show the EHLO address in Received:
1259 header lines when this was not necessary.
1261 PH/27 Added the % operator to ${eval:}.
1263 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1264 it should be ignoring failures (because with -C, for example, it has lost
1265 privilege). It wasn't ignoring creation failures other than "already
1268 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1271 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1272 because an input line was too long, either on its own, or by virtue of
1273 too many continuations, the temporary file was not being removed, and the
1274 return code was incorrect.
1276 PH/31 Missing "BOOL" in function definition in filtertest.c.
1278 PH/32 Applied Sieve patches from the maintainer.
1280 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1282 PH/33 Added "verify = not_blind".
1284 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1285 Local/Makefile (with some defaults set). These are used in built scripts
1286 such as exicyclog, but they have never been used in the exim_install
1287 script (though there are many overriding facilities there). I have
1288 arranged that the exim_install script now takes note of these two
1291 PH/35 Installed configuration files for Dragonfly.
1293 PH/36 When a locally submitted message by a trusted user did not contain a
1294 From: header, and the sender address was obtained from -f or from an SMTP
1295 MAIL command, and the trusted user did not use -F to supply a sender
1296 name, $originator_name was incorrectly used when constructing a From:
1297 header. Furthermore, $originator_name was used for submission mode
1298 messages from external hosts without From: headers in a similar way,
1299 which is clearly wrong.
1301 PH/37 Added control=suppress_local_fixups.
1303 PH/38 When log_selector = +received_sender was set, and the addition of the
1304 sender made the log line's construction buffer exactly full, or one byte
1305 less than full, an overflow happened when the terminating "\n" was
1308 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1309 when the result of a list match is failure because a DNS lookup failed.
1311 PH/40 RM_COMMAND is now used in the building process.
1313 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1314 the "build-* directories that it finds.
1316 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1317 address in a domain literal was a prefix of an interface address.
1319 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1320 when verifying a sender address, unless rewrite_headers is false.
1322 PH/44 Wrote a long comment about why errors_to addresses are verified as
1323 recipients, not senders.
1325 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1326 the ratelimit ACL was added.
1328 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1330 PH/46 Added extra information about PostgreSQL errors to the error string.
1332 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1333 avoiding the need to install special zones in a real server. This is
1334 backwards compatible; if it can't find the fake resolver, it drops back.
1335 Thus, both old and new test suites can be run.
1337 TF/02 Added util/ratelimit.pl
1339 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1340 clock is set back in time.
1342 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1343 Candler <B.Candler@pobox.com>.
1345 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1346 OK for addresses that are the result of redirections.
1348 PH/48 A number of further additions for the benefit of the new test suite,
1349 including a fake gethostbyname() that interfaces to the fake DNS resolver
1352 TF/06 The fix for widen_domains has also been applied to qualify_single and
1353 search_parents which are the other dnslookup options that can cause
1356 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1359 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1361 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1362 service" if it encountered an MX record with an empty target hostname.
1363 The message is now "an MX or SRV record indicated no SMTP service".
1365 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1366 if the DNS of the sending site is misconfigured. This is quite a
1367 common situation. This change restores the behaviour of treating a
1368 helo verification defer as a failure.
1370 PH/51 If self=fail was set on a router, the bounce message did not include the
1371 actual error message.
1377 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1379 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1380 command itself ended in error, the underlying message about the transport
1381 filter timeout was being overwritten with the pipe command error. Now the
1382 underlying error message should be appended to the second error message.
1384 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1386 PH/02 Reduce the amount of output that "make" produces by default. Full output
1387 can still be requested.
1389 PH/03 The warning log line about a condition test deferring for a "warn" verb
1390 was being output only once per connection, rather than after each
1391 occurrence (because it was using the same function as for successful
1392 "warn" verbs). This seems wrong, so I have changed it.
1394 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1395 it should not have, which might have caused a crash in the right
1396 circumstances, but probably never did.
1398 PH/04 Installed a modified version of Tony Finch's patch to make submission
1399 mode fix the return path as well as the Sender: header line, and to
1400 add a /name= option so that you can make the user's friendly name appear
1403 TF/03 Added the control = fakedefer ACL modifier.
1405 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1406 Mark Lowes for thorough testing.
1408 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1410 TK/03 Merged latest SRS patch from Miles Wilton.
1412 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1413 with the definition in sysexits.h (which is #included earlier).
1414 Fortunately, Exim does not actually use EX_OK. The code used to try to
1415 preserve the sysexits.h value, by assumimg that macro definitions were
1416 scanned for macro replacements. I have been disabused of this notion,
1417 so now the code just undefines EX_OK before #including unistd.h.
1419 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1420 in the smtp transport. When a block could not be written in a single
1421 write() function, the timeout was being re-applied to each part-write.
1422 This seems wrong - if the receiver was accepting one byte at a time it
1423 would take for ever. The timeout is now adjusted when this happens. It
1424 doesn't have to be particularly precise.
1426 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1427 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1429 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1430 without a domain if the check to <postmaster@domain> fails.
1432 SC/01 Eximstats: added -xls and the ability to specify output files
1433 (patch written by Frank Heydlauf).
1435 SC/02 Eximstats: use FileHandles for outputing results.
1437 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1439 SC/04 Eximstats: fixed display of large numbers with -nvr option
1441 SC/05 Eximstats: fixed merging of reports with empty tables.
1443 SC/06 Eximstats: added the -include_original_destination flag
1445 SC/07 Eximstats: removed tabs and trailing whitespace.
1447 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1449 TK/06 MBOX spool code: Add real "From " MBOX separator line
1450 so the .eml file is really in mbox format (even though
1451 most programs do not really care). Patch from Alex Miller.
1453 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1454 The latter is generated from $received_to and is only set if the
1455 message has one envelope recipient. SA can use these headers,
1456 obviously out-of-the-box. Patch from Alex Miller.
1458 PH/08 The ${def test on a variable was returning false if the variable's
1459 value was "0", contrary to what the specification has always said!
1460 The result should be true unless the variable is empty.
1462 PH/09 The syntax error of a character other than { following "${if
1463 def:variable_name" (after optional whitespace) was not being diagnosed.
1464 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1465 accidental colon was present, for example, could give incorrect results.
1467 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1468 result is used (not including appendfile, where other changes are about
1471 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1472 This involved changing a lot of size variables from int to off_t. It
1473 should work with maildirs and everything.
1475 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1476 spamd dying while we are connected to it.
1478 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1481 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1482 function for BDB 4.3.
1484 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1486 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1487 the sources for PCRE have been re-arranged and more files are now
1490 PH/15 The code I had for printing potentially long long variables in PH/11
1491 above was not the best (it lost precision). The length of off_t variables
1492 is now inspected at build time, and an appropriate printing format (%ld
1493 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1494 to be "long long int" or "long int". This is needed for the internal
1495 formatting function string_vformat().
1497 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1498 the configuration file to be ":syslog", then the script "guesses" where
1499 the logs files are, rather than using the compiled in default. In our
1500 case the guess is not the same as the compiled default, so the script
1501 suddenly stopped working when I started to use syslog. The patch checks
1502 to see if log_file_path is "". If so, it attempts to read it from exim
1503 with no configuration file to get the compiled in version, before it
1504 falls back to the previous guessing code."
1506 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1507 implementing BATV in an Exim configuration. See NewStuff for the gory
1510 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1511 Makefile that are specific to HP-UX.
1513 PH/18 If the "use_postmaster" option was set for a recipient callout together
1514 with the "random" option, the postmaster address was used as the MAIL
1515 FROM address for the random test, but not for the subsequent recipient
1516 test. It is now used for both.
1518 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1519 patch removes a few documentation additions to RFC 3028, because the
1520 latest draft now contains them. It adds the new en;ascii-case comparator
1521 and a new error check for 8bit text in MIME parts. Comparator and
1522 require names are now matched exactly. I enabled the subaddress
1523 extension, but it is not well tested yet (read: it works for me)."
1525 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1526 rework some of the code of TK/09 above to avoid the hardwired use of
1527 "%lld" and "long long". Replaced the call to snprintf() with a call to
1530 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1531 records point to non-existent hosts", "retry timeout exceeded", and
1532 "retry time not reached for any host after a long failure period".
1534 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1535 experimental DomainKeys support:
1537 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1538 (2) On an error such as an illegally used "control", the wrong name for
1539 the control was given.
1541 These problems did NOT occur unless DomainKeys support was compiled.
1543 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1545 PH/24 Added ${if match_ip condition.
1547 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1548 databases so that it will be absolutely obvious if a crash occurs in the
1549 DB library. This is a regular occurrence (often caused by mis-matched
1552 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1553 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1554 picked up on a user's system that detects such things. There doesn't seem
1555 to be a gcc warning option for this - only an attribute that has to be
1556 put on the function's prototype. It seems that in Fedora Core 4 they have
1557 set this on a number of new functions. No doubt there will be more in due
1560 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1561 specify a transport. However, if an address that was verified by such a
1562 router was the subject of a callout, Exim crashed because it tried to
1563 read the rcpt_include_affixes from the non-existent transport. Now it
1564 just assumes that the setting of that option is false. This bug was
1565 introduced by 4.51/PH/31.
1567 PH/28 Changed -d+all to exclude +memory, because that information is very
1568 rarely of interest, but it makes the output a lot bigger. People tend to
1569 do -d+all out of habit.
1571 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1572 code in os-type was giving problems when libc.so lives in lib64, like on
1575 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1576 aren't the modern standard, and it seems that some systems' include files
1577 don't always have them. Exim was already checking for some of the newer
1578 ones like T_AAAA, and defining it itself. I've added checks for all the
1579 record types that Exim uses.
1581 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1582 not automatically generating a new one, as it is supposed to. This
1583 prevented TLS from working. If the file did exist, but contained invalid
1584 data, a new version was generated, as expected. It was only the case of a
1585 non-existent file that was broken.
1587 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1588 with a change in libdomainkeys > 0.64.
1590 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1591 from DNS. If the selector record carries the flag, it now has
1592 precedence over the domain-wide flag.
1594 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1596 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1597 the use of a port name that isn't defined in /etc/services) occurred, the
1598 message was deferred as in a normal delivery, and thus remained on the
1599 spool, instead of being failed because of the mua_wrapper setting. This
1600 is now fixed, and I tidied up some of the mua_wrapper messages at the
1603 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1604 the messages in a hash of arrays rather than using individual hashes.
1605 This is a bit cleaner and results in dramatic memory savings, albeit
1606 at a slight CPU cost.
1608 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1609 as requested by Marc Sherman.
1611 SC/10 Eximstats: added histograms for user specified patterns as requested
1614 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1616 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1617 fopen() in the content-scanning modules that did not already have it.
1623 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1624 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1626 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1628 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1630 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1631 to test Sieve filters that use "vacation".
1633 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1634 that changes the way the GnuTLS parameters are stored in the cache file.
1635 The new format can be generated externally. For backward compatibility,
1636 if the data in the cache doesn't make sense, Exim assumes it has read an
1637 old-format file, and it generates new data and writes a new file. This
1638 means that you can't go back to an older release without removing the
1641 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1642 work if there are any delivery delays because "one_time" forces the
1643 parent to be marked "delivered", so its unseen clone is never tried
1644 again. For this reason, Exim now forbids the simultaneous setting of
1647 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1648 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1649 entry if you want to know the details. The fix, however, neglected to
1650 consider the case when local delivery batching is involved. The test for
1651 "previously delivered" was not happening when checking to see if an
1652 address could be batched with a previous (undelivered) one; under
1653 certain circumstances this could lead to multiple deliveries to the same
1656 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1657 in its include files, and this causes problems building Exim.
1659 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1660 header_syntax) but Exim was just ignoring anything given after a slash.
1661 In particular, this caused confusion with an attempt to use "verify =
1662 reverse_host_lookup/defer_ok". An error is now given when options are
1663 supplied for verify items that do not have them. (Maybe reverse_host_
1664 lookup should have a defer_ok option, but that's a different point.)
1666 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1667 defined by RFC 821) to 2048, because there were problems with some AUTH
1668 commands, and RFC 1869 says the size should be increased for extended
1669 SMTP commands that take arguments.
1671 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1674 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1675 "unknown" error; now it says that the functionality isn't in the binary.
1677 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1678 an address' error message when a string expansion fails (syntax or
1679 whatever). Otherwise the password may appear in the log. Following change
1680 PH/42 below, there is no longer a chance of it appearing in a bounce
1683 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1685 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1686 of its addresses was ever tried. (Bugzilla bug #2.)
1688 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1689 the result incorrectly in the debug output. (It correctly added a newline
1690 to what was transported.)
1692 TF/01 Added $received_time.
1694 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1695 commented out examples of how to interface to a virus scanner and to
1696 SpamAssassin. Also added commented examples of av_scanner and
1697 spamd_address settings.
1699 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1700 and controls are allowed in which ACLs. There were a couple of minor
1701 errors. Some of the entries in the conditions table (which is a table of
1702 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1703 negation of where the condition IS allowed.
1705 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1707 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1708 header file does not have a version number, so I've had to invent a new
1709 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1710 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1711 radiusclient), but it was contributed by a Radius user.
1713 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1714 files or directories, for OpenSSL.
1716 PH/19 When an Exim process that is running as root has to create an Exim log
1717 file, it does so in a subprocess that runs as exim:exim so as to get the
1718 ownership right at creation (otherwise, other Exim processes might see
1719 the file with the wrong ownership). There was no test for failure of this
1720 fork() call, which would lead to the process getting stuck as it waited
1721 for a non-existent subprocess. Forks do occasionally fail when resources
1722 run out. I reviewed all the other calls to fork(); they all seem to check
1725 PH/20 When checking for unexpected SMTP input at connect time (before writing
1726 the banner), Exim was not dealing correctly with a non-positive return
1727 from the read() function. If the client had disconnected by this time,
1728 the result was a log entry for a synchronization error with an empty
1729 string after "input=" when read() returned zero. If read() returned -1
1730 (an event I could not check), uninitialized data bytes were printed.
1731 There were reports of junk text (parts of files, etc) appearing after
1734 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1736 PH/22 Added support for macro redefinition, and (re)definition in between
1737 driver and ACL definitions.
1739 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1740 forgetting to use the resulting value; it was using the unexpanded value.
1742 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1743 hadn't been configured. The fix is from Juergen Kreileder, who
1744 understands it better than I do:
1746 "Here's what I see happening with three configured cyrus_sasl
1747 authenticators configured (plain, login, cram-md5):
1749 On startup auth_cyrus_sasl_init() gets called for each of these.
1750 This means three calls to sasl_listmech() without a specified mech_list.
1751 => SASL tests which mechs of all available mechs actually work
1752 => three warnings about OTP not working
1753 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1755 With the patch, sasl_listmech() also gets called three times. But now
1756 SASL's mech_list option is set to the server_mech specified in the the
1757 authenticator. Or in other words, the answer from sasl_listmech()
1758 gets limited to just the mech you're testing for (which is different
1760 => the return list contains just 'plain' or 'login', 'cram-md5' or
1761 nothing depending on the value of ob->server_mech.
1763 I've just tested the patch: Authentication still works fine,
1764 unavailable mechs specified in the exim configuration are still
1765 caught, and the auth.log warnings about OTP are gone."
1767 PH/25 When debugging is enabled, the contents of the command line are added
1768 to the debugging output, even when log_selector=+arguments is not
1771 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1772 answer is "GNU", and only if the return is "GNU/something" is the answer
1775 PH/27 $acl_verify_message is now set immediately after the failure of a
1776 verification in an ACL, and so is available in subsequent modifiers. In
1777 particular, the message can be preserved by coding like this:
1779 warn !verify = sender
1780 set acl_m0 = $acl_verify_message
1782 Previously, $acl_verify_message was set only while expanding "message"
1783 and "log_message" when a very denied access.
1785 PH/28 Modified OS/os.c-Linux with
1787 -#ifndef OS_LOAD_AVERAGE
1788 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1790 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1791 nomenclature these days.)
1793 PH/29 Installed patch from the Sieve maintainer that adds the options
1794 sieve_useraddress and sieve_subaddress to the redirect router.
1796 PH/30 In these circumstances:
1797 . Two addresses routed to the same list of hosts;
1798 . First host does not offer TLS;
1799 . First host accepts first address;
1800 . First host gives temporary error to second address;
1801 . Second host offers TLS and a TLS session is established;
1802 . Second host accepts second address.
1803 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1804 and peerdn, if requested) that were in fact used only for the second
1807 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1808 attention to any local part prefix or suffix that was matched by the
1809 router that accepted the address. It now behaves in the same way as it
1810 does for delivery: the affixes are removed from the local part unless
1811 rcpt_include_affixes is set on the transport.
1813 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1814 timeout during the DATA phase of an incoming message.
1816 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1817 applied a patch sanctioned by the Sieve maintainer.
1819 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1820 the uid or gid is negative. A case of a negative gid caused this to be
1821 noticed. The fix allows for either to be negative.
1823 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1824 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1827 PH/36 The change PH/12 above was broken. Fixed it.
1829 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1830 the grounds that routing the same address twice would always produce the
1831 same answer. This might have been true once, but it is certainly no
1832 longer true now. Routing a child address may depend on the previous
1833 routing that produced that child. Some complicated redirection strategies
1834 went wrong when messages had multiple recipients, and made Exim's
1835 behaviour dependent on the order in which the addresses were given.
1837 I have moved the duplicate checking until after the routing is complete.
1838 Exim scans the addresses that are assigned to local and remote
1839 transports, and removes any duplicates. This means that more work will be
1840 done, as duplicates will always all be routed, but duplicates are
1841 presumably rare, so I don't expect this is of any significance.
1843 For deliveries to pipes, files, and autoreplies, the duplicate checking
1844 still happens during the routing process, since they are not going to be
1847 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1848 It corrects a timeout issue with spamd. This is Ian's comment: "The
1849 background is that sometimes spamd either never reads data from a
1850 connection it has accepted, or it never writes response data. The exiscan
1851 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1852 blindly assumes that writes won't block so it may never time out."
1854 PH/39 Allow G after quota size as well as K and M.
1856 PH/40 The value set for $authenticated_id in an authenticator may not contain
1857 binary zeroes or newlines because the value is written to log lines and
1858 to spool files. There was no check on this. Now the value is run through
1859 the string_printing() function so that such characters are converted to
1860 printable escape sequences.
1862 PH/41 $message_linecount is a new variable that contains the total number of
1863 lines in the message. Compare $body_linecount, which is the count for the
1866 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1867 bounce and delay warning messages, except in certain special cases, which
1870 (a) An SMTP error message from a remote host;
1871 (b) A message specified in a :fail: redirection;
1872 (c) A message specified in a "fail" command in a system filter;
1873 (d) A message specified in a FAIL return from the queryprogram router;
1874 (e) A message specified by the cannot_route_message router option.
1876 In these cases only, Exim does include the error details in bounce and
1877 warning messages. There are also a few cases where bland messages such
1878 as "unrouteable address" or "local delivery error" are given.
1880 PH/43 $value is now also set for the "else" part of a ${run expansion.
1882 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1883 being worked on, but at least Exim now implements the latest version to
1886 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1887 process to complete was treated as a delivery failure, a timeout while
1888 writing the message to the pipe was logged, but erroneously treated as a
1889 successful delivery. Such timeouts include transport filter timeouts. For
1890 consistency with the overall process timeout, these timeouts are now
1891 treated as errors, giving rise to delivery failures by default. However,
1892 there is now a new Boolean option for the pipe transport called
1893 timeout_defer, which, if set TRUE, converts the failures into defers for
1894 both kinds of timeout. A transport filter timeout is now identified in
1897 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1898 systems where "make" and "gmake" are different, calling "gmake" at top
1899 level broke things. I've arranged for the value of $(MAKE) to be passed
1900 from the Makefile to this script so that it can call the same version of
1904 A note about Exim versions 4.44 and 4.50
1905 ----------------------------------------
1907 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1908 changes of various kinds. As a consequence, a big documentation update was
1909 needed. This delayed the release for rather longer than seemed good, especially
1910 in the light of a couple of (minor) security issues. Therefore, the changes
1911 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1912 release. So 4.44 and 4.50 are in effect two different branches that both start
1915 I have left the 4.50 change log unchanged; it contains all the changes since
1916 4.43. The change log for 4.44 is below; many of its items are identical to
1917 those for 4.50. This seems to be the most sensible way to preserve the
1918 historical information.
1924 1. Minor wording change to the doc/README.SIEVE file.
1926 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1927 computation of the current number of files was incorrect.
1929 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1930 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1933 4. Give more explanation in the error message when the command for a transport
1934 filter fails to execute.
1936 5. There are several places where Exim runs a non-Exim command in a
1937 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1938 was being done only for the command run by the queryprogram router. It is
1939 now done for all such subprocesses. The other cases are: ${run, transport
1940 filters, and the commands run by the lmtp and pipe transports.
1942 6. Added CONFIGURE_GROUP build-time option.
1944 7. Some older OS have a limit of 256 on the maximum number of file
1945 descriptors. Exim was using setrlimit() to set 1000 as a large value
1946 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1947 systems. I've change it so that if it can't get 1000, it tries for 256.
1949 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1950 was an oversight, and furthermore, ever since the addition of extra
1951 controls (e.g. 4.43/32), the checks on when to allow different forms of
1952 "control" were broken. There should now be diagnostics for all cases when a
1953 control that does not make sense is encountered.
1955 9. Added the /retain_sender option to "control=submission".
1957 10. $recipients is now available in the predata ACL (oversight).
1959 11. Tidy the search cache before the fork to do a delivery from a message
1960 received from the command line. Otherwise the child will trigger a lookup
1961 failure and thereby defer the delivery if it tries to use (for example) a
1962 cached ldap connection that the parent has called unbind on.
1964 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1965 of $address_data from the recipient verification was clobbered by the
1966 sender verification.
1968 13. The value of address_data from a sender verification is now available in
1969 $sender_address_data in subsequent conditions in the ACL statement.
1971 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1973 15. Added a new option "connect=<time>" to callout options, to set a different
1976 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1977 was its contents. (It was OK if the option was not defined at all.)
1979 17. A "Completed" log line is now written for messages that are removed from
1980 the spool by the -Mrm option.
1982 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1983 information about exactly what failed.
1985 19. Added -dd to debug only the daemon process.
1987 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1988 handles timeouts, both on the server side and network timeouts. Renamed the
1989 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1991 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1992 It is now set to "smtps".
1994 22. $host_address is now set to the target address during the checking of
1995 ignore_target_hosts.
1997 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1998 being passed; this would have caused $sender_host_name to have been used if
1999 matching the list had actually called for a host name (not very likely,
2000 since this list is usually IP addresses). A host name is now passed as
2003 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2004 code that specifies a non-restarting handler (typically sigaction() in
2005 modern systems) in an attempt to fix a rare and obscure crash bug.
2007 25. Narrowed the window for a race in the daemon that could cause it to ignore
2008 SIGCHLD signals. This is not a major problem, because they are used only to
2009 wake it up if nothing else does.
2011 26. A malformed maildirsize file could cause Exim to calculate negative values
2012 for the mailbox size or file count. Odd effects could occur as a result.
2013 The maildirsize information is now recalculated if the size or filecount
2016 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2017 support for a long time. Removed HAVE_SYS_VFS_H.
2019 28. Installed the latest version of exipick from John Jetmore.
2021 29. In an address list, if the pattern was not a regular expression, an empty
2022 subject address (from a bounce message) matched only if the pattern was an
2023 empty string. Non-empty patterns were not even tested. This was the wrong
2024 because it is perfectly reasonable to use an empty address as part of a
2025 database query. An empty address is now tested by patterns that are
2026 lookups. However, all the other forms of pattern expect the subject to
2027 contain a local part and a domain, and therefore, for them, an empty
2028 address still always fails if the pattern is not itself empty.
2030 30. Exim went into a mad DNS loop when attempting to do a callout where the
2031 host was specified on an smtp transport, and looking it up yielded more
2032 than one IP address.
2034 31. Re-factored the code for checking spool and log partition space into a
2035 function that finds that data and another that does the check. The former
2036 is then used to implement four new variables: $spool_space, $log_space,
2037 $spool_inodes, and $log_inodes.
2039 32. The RFC2047 encoding function was originally intended for short strings
2040 such as real names; it was not keeping to the 75-character limit for
2041 encoded words that the RFC imposes. It now respects the limit, and
2042 generates multiple encoded words if necessary. To be on the safe side, I
2043 have increased the buffer size for the ${rfc2047: expansion operator from
2046 33. It is now permitted to omit both strings after an "if" condition; if the
2047 condition is true, the result is "true". As before, when the second string
2048 is omitted, a false condition yields an empty string. This makes it less
2049 cumbersome to write custom ACL and router conditions.
2051 34. Failure to deliver a bounce message always caused it to be frozen, even if
2052 there was an errors_to setting on the router. The errors_to setting is now
2055 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2056 canonical form (fully expanded) before being placed in
2057 $sender_host_address.
2059 36. The table in the code that translates DNS record types into text (T_A to
2060 "A" for instance) was missing entries for NS and CNAME. It is just possible
2061 that this could have caused confusion if both these types were looked up
2062 for the same domain, because the text type is used as part of Exim's
2063 per-process caching. But the chance of anyone hitting this buglet seems
2066 37. The dnsdb lookup has been extended in a number of ways.
2068 (1) There is a new type, "zns", which walks up the domain tree until it
2069 finds some nameserver records. It should be used with care.
2071 (2) There is a new type, "mxh", which is like "mx" except that it returns
2072 just the host names, not the priorities.
2074 (3) It is now possible to give a list of domains (or IP addresses) to be
2075 looked up. The behaviour when one of the lookups defers can be
2076 controlled by a keyword.
2078 (4) It is now possible to specify the separator character for use when
2079 multiple records are returned.
2081 38. The dnslists ACL condition has been extended: it is now possible to supply
2082 a list of IP addresses and/or domains to be looked up in a particular DNS
2085 39. Added log_selector=+queue_time_overall.
2087 40. When running the queue in the test harness, wait just a tad after forking a
2088 delivery process, to get repeatability of debugging output.
2090 41. Include certificate and key file names in error message when GnuTLS fails
2091 to set them up, because the GnuTLS error message doesn't include the name
2092 of the failing file when there is a problem reading it.
2094 42. Allow both -bf and -bF in the same test run.
2096 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2098 44. The "Exiscan patch" is now merged into the mainline Exim source.
2100 45. Sometimes the final signoff response after QUIT could fail to get
2101 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2102 < 0 before doing a fflush(). This bug looks as though it goes back to the
2103 introduction of TLS in release 3.20, but "sometimes" must have been rare
2104 because the tests only now provoked it.
2106 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2107 (this can affect the format of dates).
2109 47. exim_tidydb, when checking for the continued existence of a message for
2110 which it has found a message-specific retry record, was not finding
2111 messages that were in split spool directories. Consequently, it was
2112 deleting retry records that should have stayed in existence.
2114 48. Steve fixed some bugs in eximstats.
2116 49. The SPA authentication driver was not abandoning authentication and moving
2117 on to the next authenticator when an expansion was forced to fail,
2118 contradicting the general specification for all authenticators. Instead it
2119 was generating a temporary error. It now behaves as specified.
2121 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2122 (the order specifies the preference for clients). The order is now AES256,
2123 AES128, 3DES, ARCFOUR128.
2125 51. Small patch to Sieve code - explicitly set From: when generating an
2128 52. Exim crashed if a remote delivery caused a very long error message to be
2129 recorded - for instance if somebody sent an entire SpamAssassin report back
2130 as a large number of 550 error lines. This bug was coincidentally fixed by
2131 increasing the size of one of Exim's internal buffers (big_buffer) that
2132 happened as part of the Exiscan merge. However, to be on the safe side, I
2133 have made the code more robust (and fixed the comments that describe what
2136 53. Now that there can be additional text after "Completed" in log lines (if
2137 the queue_time_overall log selector is set), a one-byte patch to exigrep
2138 was needed to allow it to recognize "Completed" as not the last thing in
2141 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2142 patch that reportedly fixes this has been added. I am not expert enough to
2143 create a test for it. This is what the patch creator wrote:
2145 "I found a little strange behaviour of ldap code when working with
2146 Windows 2003 AD Domain, where users was placed in more than one
2147 Organization Units. When I tried to give exim partial DN, the exit code
2148 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2149 But simultaneously result of request was absolutely normal ldap result,
2150 so I produce this patch..."
2152 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2153 REFERENCE, so I have modified the code to exclude the patch when that macro
2156 55. Some experimental protocols are using DNS PTR records for new purposes. The
2157 keys for these records are domain names, not reversed IP addresses. The
2158 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2159 leaves it alone. Component reversal etc. now happens only for IP addresses.
2162 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2164 57. Double the size of the debug message buffer (to 2048) so that more of very
2165 long debug lines gets shown.
2167 58. The exicyclog utility now does better if the number of log files to keep
2168 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2170 59. Two changes related to the smtp_active_hostname option:
2172 (1) $smtp_active_hostname is now available as a variable.
2173 (2) The default for smtp_banner uses $smtp_active_hostname instead
2174 of $primary_hostname.
2176 60. The host_aton() function is supposed to be passed a string that is known
2177 to be a valid IP address. However, in the case of IPv6 addresses, it was
2178 not checking this. This is a hostage to fortune. Exim now panics and dies
2179 if the condition is not met. A case was found where this could be provoked
2180 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2181 components; fortuitously, this particular loophole had already been fixed
2182 by change 4.50/55 above.
2184 If there are any other similar loopholes, the new check in host_aton()
2185 itself should stop them being exploited. The report I received stated that
2186 data on the command line could provoke the exploit when Exim was running as
2187 exim, but did not say which command line option was involved. All I could
2188 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2189 running as the user.
2192 61. There was a buffer overflow vulnerability in the SPA authentication code
2193 (which came originally from the Samba project). I have added a test to the
2194 spa_base64_to_bits() function which I hope fixes it.
2197 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2198 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2200 63. The daemon start-up calls getloadavg() while still root for those OS that
2201 need the first call to be done as root, but it missed one case: when
2202 deliver_queue_load_max is set with deliver_drop_privilege. This is
2203 necessary for the benefit of the queue runner, because there is no re-exec
2204 when deliver_drop_privilege is set.
2206 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2207 This has been fixed.
2209 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2210 was in use, was not putting the data itself into the right store pool;
2211 consequently, it could be overwritten for a subsequent message in the same
2212 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2215 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2217 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2218 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2219 the function were treating the return as a boolean value, which happened to
2220 work because 0=false and not-0=true, but is not correct code.
2222 68. The host_aton() function was not handling scoped IPv6 addresses (those
2223 with, for example, "%eth0" on the end) correctly.
2225 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2226 negated items (that is, ~something) in unsigned ints. Some compilers
2227 apparently mutter when there is no cast.
2229 70. If an address verification called from an ACL failed, and did not produce a
2230 user-specific message (i.e. there was only a "system" message), nothing was
2231 put in $acl_verify_message. In this situation, it now puts the system
2234 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2235 session; change 4.31/43 added the unwanted input to the log line - except
2236 that it did not do this in the start of session case. It now does.
2238 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2239 This is wrong and can cause the other end to generate a synchronization
2240 error if it is another Exim or anything else that does the synchronization
2241 check. A QUIT command is no longer sent after a timeout.
2243 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2244 during host lookups.
2246 74. The defer_ok option of callout verification was not working if it was used
2247 when verifying addresses in header lines, that is, for this case:
2249 verify = header_sender/callout=defer_ok
2251 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2252 those file descriptors could be used for SMTP connections. If anything
2253 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2254 could be sent to the SMTP client, causing chaos. The daemon now opens
2255 stdin, stdout, and stderr to /dev/null when it puts itself into the
2258 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2259 log by default. The user can override this with suitable Perl magic.
2261 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2262 the log message when discard triggers, was not working for the DATA ACL or
2263 for the non-SMTP ACL.
2265 78. Error message wording change in sieve.c.
2267 79. If smtp_accept_max_per_host was set, the number of connections could be
2268 restricted to fewer than expected, because the daemon was trying to set up
2269 a new connection before checking whether the processes handling previous
2270 connections had finished. The check for completed processes is now done
2271 earlier. On busy systems, this bug wouldn't be noticed because something
2272 else would have woken the daemon, and it would have reaped the completed
2275 80. If a message was submitted locally by a user whose login name contained one
2276 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2277 It caused a spool format error. I have fixed the spool reading code. A
2278 related problem was that the "from" clause in the Received: line became
2279 illegal because of the space(s). It is now covered by ${quote_local_part.
2281 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2284 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2286 83. Patch from Sieve maintainer to fix unterminated string problem in
2287 "vacation" handling.
2289 84. Some minor changes to the Linux configuration files to help with other
2290 OS variants using glibc.
2292 85. One more patch for Sieve to update vacation handling to latest spec.
2295 ----------------------------------------------------
2296 See the note above about the 4.44 and 4.50 releases.
2297 ----------------------------------------------------
2303 1. Change 4.43/35 introduced a bug that caused file counts to be
2304 incorrectly computed when quota_filecount was set in an appendfile
2307 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2308 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2311 3. Give more explanation in the error message when the command for a transport
2312 filter fails to execute.
2314 4. There are several places where Exim runs a non-Exim command in a
2315 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2316 was being done only for the command run by the queryprogram router. It is
2317 now done for all such subprocesses. The other cases are: ${run, transport
2318 filters, and the commands run by the lmtp and pipe transports.
2320 5. Some older OS have a limit of 256 on the maximum number of file
2321 descriptors. Exim was using setrlimit() to set 1000 as a large value
2322 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2323 systems. I've change it so that if it can't get 1000, it tries for 256.
2325 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2326 was an oversight, and furthermore, ever since the addition of extra
2327 controls (e.g. 4.43/32), the checks on when to allow different forms of
2328 "control" were broken. There should now be diagnostics for all cases when a
2329 control that does not make sense is encountered.
2331 7. $recipients is now available in the predata ACL (oversight).
2333 8. Tidy the search cache before the fork to do a delivery from a message
2334 received from the command line. Otherwise the child will trigger a lookup
2335 failure and thereby defer the delivery if it tries to use (for example) a
2336 cached ldap connection that the parent has called unbind on.
2338 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2339 of $address_data from the recipient verification was clobbered by the
2340 sender verification.
2342 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2343 was its contents. (It was OK if the option was not defined at all.)
2345 11. A "Completed" log line is now written for messages that are removed from
2346 the spool by the -Mrm option.
2348 12. $host_address is now set to the target address during the checking of
2349 ignore_target_hosts.
2351 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2352 being passed; this would have caused $sender_host_name to have been used if
2353 matching the list had actually called for a host name (not very likely,
2354 since this list is usually IP addresses). A host name is now passed as
2357 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2358 code that specifies a non-restarting handler (typically sigaction() in
2359 modern systems) in an attempt to fix a rare and obscure crash bug.
2361 15. Narrowed the window for a race in the daemon that could cause it to ignore
2362 SIGCHLD signals. This is not a major problem, because they are used only to
2363 wake it up if nothing else does.
2365 16. A malformed maildirsize file could cause Exim to calculate negative values
2366 for the mailbox size or file count. Odd effects could occur as a result.
2367 The maildirsize information is now recalculated if the size or filecount
2370 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2371 support for a long time. Removed HAVE_SYS_VFS_H.
2373 18. Updated exipick to current release from John Jetmore.
2375 19. Allow an empty sender to be matched against a lookup in an address list.
2376 Previously the only cases considered were a regular expression, or an
2379 20. Exim went into a mad DNS lookup loop when doing a callout where the
2380 host was specified on the transport, if the DNS lookup yielded more than
2383 21. The RFC2047 encoding function was originally intended for short strings
2384 such as real names; it was not keeping to the 75-character limit for
2385 encoded words that the RFC imposes. It now respects the limit, and
2386 generates multiple encoded words if necessary. To be on the safe side, I
2387 have increased the buffer size for the ${rfc2047: expansion operator from
2390 22. Failure to deliver a bounce message always caused it to be frozen, even if
2391 there was an errors_to setting on the router. The errors_to setting is now
2394 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2395 canonical form (fully expanded) before being placed in
2396 $sender_host_address.
2398 24. Updated eximstats to version 1.33
2400 25. Include certificate and key file names in error message when GnuTLS fails
2401 to set them up, because the GnuTLS error message doesn't include the name
2402 of the failing file when there is a problem reading it.
2404 26. Expand error message when OpenSSL has problems setting up cert/key files.
2407 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2408 (this can affect the format of dates).
2410 28. exim_tidydb, when checking for the continued existence of a message for
2411 which it has found a message-specific retry record, was not finding
2412 messages that were in split spool directories. Consequently, it was
2413 deleting retry records that should have stayed in existence.
2415 29. eximstats updated to version 1.35
2416 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2417 1.35 - bugfix such that pie charts by volume are generated correctly
2419 30. The SPA authentication driver was not abandoning authentication and moving
2420 on to the next authenticator when an expansion was forced to fail,
2421 contradicting the general specification for all authenticators. Instead it
2422 was generating a temporary error. It now behaves as specified.
2424 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2425 (the order specifies the preference for clients). The order is now AES256,
2426 AES128, 3DES, ARCFOUR128.
2428 31. Small patch to Sieve code - explicitly set From: when generating an
2431 32. Exim crashed if a remote delivery caused a very long error message to be
2432 recorded - for instance if somebody sent an entire SpamAssassin report back
2433 as a large number of 550 error lines. This bug was coincidentally fixed by
2434 increasing the size of one of Exim's internal buffers (big_buffer) that
2435 happened as part of the Exiscan merge. However, to be on the safe side, I
2436 have made the code more robust (and fixed the comments that describe what
2439 33. Some experimental protocols are using DNS PTR records for new purposes. The
2440 keys for these records are domain names, not reversed IP addresses. The
2441 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2442 leaves it alone. Component reversal etc. now happens only for IP addresses.
2445 34. The host_aton() function is supposed to be passed a string that is known
2446 to be a valid IP address. However, in the case of IPv6 addresses, it was
2447 not checking this. This is a hostage to fortune. Exim now panics and dies
2448 if the condition is not met. A case was found where this could be provoked
2449 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2450 components; fortuitously, this particular loophole had already been fixed
2451 by change 4.50/55 or 4.44/33 above.
2453 If there are any other similar loopholes, the new check in host_aton()
2454 itself should stop them being exploited. The report I received stated that
2455 data on the command line could provoke the exploit when Exim was running as
2456 exim, but did not say which command line option was involved. All I could
2457 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2458 running as the user.
2461 35. There was a buffer overflow vulnerability in the SPA authentication code
2462 (which came originally from the Samba project). I have added a test to the
2463 spa_base64_to_bits() function which I hope fixes it.
2466 36. The daemon start-up calls getloadavg() while still root for those OS that
2467 need the first call to be done as root, but it missed one case: when
2468 deliver_queue_load_max is set with deliver_drop_privilege. This is
2469 necessary for the benefit of the queue runner, because there is no re-exec
2470 when deliver_drop_privilege is set.
2472 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2473 was in use, was not putting the data itself into the right store pool;
2474 consequently, it could be overwritten for a subsequent message in the same
2475 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2478 38. Sometimes the final signoff response after QUIT could fail to get
2479 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2480 < 0 before doing a fflush(). This bug looks as though it goes back to the
2481 introduction of TLS in release 3.20, but "sometimes" must have been rare
2482 because the tests only now provoked it.
2488 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2489 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2490 Now it returns an integer. A number of calls were still expecting a T/F
2491 return. Fortuitously, in all cases, the tests worked in OK situations,
2492 which is the norm. However, things would have gone wrong on any write
2493 failures on the smtp file descriptor. This function is used when sending
2494 messages over SMTP and also when doing verify callouts.
2496 2. When Exim is called to do synchronous delivery of a locally submitted
2497 message (the -odf or -odi options), it no longer closes stderr before doing
2500 3. Implemented the mua_wrapper option.
2502 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2504 5. Implemented the functions header_remove(), header_testname(),
2505 header_add_at_position(), and receive_remove_recipient(), and exported them
2508 6. If an ACL "warn" statement specified the addition of headers, Exim already
2509 inserted X-ACL-Warn: at the start if there was no header name. However, it
2510 was not making this test for the second and subsequent header lines if
2511 there were newlines in the string. This meant that an invalid header could
2512 be inserted if Exim was badly configured.
2514 7. Allow an ACL "warn" statement to add header lines at the start or after all
2515 the Received: headers, as well as at the end.
2517 8. Added the rcpt_4xx retry error code.
2519 9. Added postmaster_mailfrom=xxx to callout verification option.
2521 10. Added mailfrom=xxxx to the callout verification option, for verify=
2524 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2525 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2527 12. Inserted some casts to stop certain compilers warning when using pointer
2528 differences as field lengths or precisions in printf-type calls (mostly
2529 affecting debugging statements).
2531 13. Added optional readline() support for -be (dynamically loaded).
2533 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2534 same clock tick as a message's arrival, so that its received time was the
2535 same as the "first fail" time on the retry record, and that message
2536 remained on the queue past the ultimate address timeout, every queue runner
2537 would try a delivery (because it was past the ultimate address timeout) but
2538 after another failure, the ultimate address timeout, which should have then
2539 bounced the address, did not kick in. This was a "< instead of <=" error;
2540 in most cases the first failure would have been in the next clock tick
2541 after the received time, and all would be well.
2543 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2544 being recognized when the domain list was tested by the match_domain
2545 condition in an expansion string.
2547 16. Added the ${str2b64: operator.
2549 17. Exim was always calling setrlimit() to set a large limit for the number of
2550 processes, without checking whether the existing limit was already
2551 adequate. (It did check for the limit on file descriptors.) Furthermore,
2552 errors from getrlimit() and setrlimit() were being ignored. Now they are
2553 logged to the main and panic logs, but Exim does carry on, to try to do its
2554 job under whatever limits there are.
2556 18. Imported PCRE 5.0.
2558 19. Trivial typo in log message " temporarily refused connection" (the leading
2561 20. If the log selector return_path_on_delivery was set and an address was
2562 redirected to /dev/null, the delivery process crashed because it assumed
2563 that a return path would always be set for a "successful" delivery. In this
2564 case, the whole delivery is bypassed as an optimization, and therefore no
2567 21. Internal re-arrangement: the function for sending a challenge and reading
2568 a response while authentication was assuming a zero-terminated challenge
2569 string. It's now changed to take a pointer and a length, to allow for
2570 binary data in such strings.
2572 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2574 23. Exim was not respecting finduser_retries when seeking the login of the
2575 uid under which it was called; it was always trying 10 times. (The default
2576 setting of finduser_retries is zero.) Also, it was sleeping after the final
2577 failure, which is pointless.
2579 24. Implemented tls_on_connect_ports.
2581 25. Implemented acl_smtp_predata.
2583 26. If the domain in control=submission is set empty, Exim assumes that the
2584 authenticated id is a complete email address when it generates From: or
2585 Sender: header lines.
2587 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2588 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2589 chown and chgrp in /bin and hostname in /usr/bin.
2591 28. Exim was keeping the "process log" file open after each use, just as it
2592 does for the main log. This opens the possibility of it remaining open for
2593 long periods when the USR1 signal hits a daemon. Occasional processlog
2594 errors were reported, that could have been caused by this. Anyway, it seems
2595 much more sensible not to leave this file open at all, so that is what now
2598 29. The long-running daemon process does not normally write to the log once it
2599 has entered its main loop, and it closes the log before doing so. This is
2600 so that log files can straightforwardly be renamed and moved. However,
2601 there are a couple of unusual error situations where the daemon does write
2602 log entries, and I had neglected to close the log afterwards.
2604 30. The text of an SMTP error response that was received during a remote
2605 delivery was being truncated at 512 bytes. This is too short for some of
2606 the long messages that one sometimes sees. I've increased the limit to
2609 31. It is now possible to make retry rules that apply only when a message has a
2610 specific sender, in particular, an empty sender.
2612 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2613 it possible to be selective about when SMTP synchronization is enforced.
2615 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2617 32. Implemented hosts_connection_nolog.
2619 33. Added an ACL for QUIT.
2621 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2624 35. Added mailbox_size and mailbox_filecount to appendfile.
2626 36. Added control = no_multiline_responses to ACLs.
2628 37. There was a bug in the logic of the code that waits for the clock to tick
2629 in the case where the clock went backwards by a substantial amount such
2630 that the microsecond fraction of "now" was more than the microsecond
2631 fraction of "then" (but the whole seconds number was less).
2633 38. Added support for the libradius Radius client library this is found on
2634 FreeBSD (previously only the radiusclient library was supported).
2640 1. When certain lookups returned multiple values in the form name=value, the
2641 quoting of the values was not always being done properly. Specifically:
2642 (a) If the value started with a double quote, but contained no whitespace,
2644 (b) If the value contained whitespace other than a space character (i.e.
2645 tabs or newlines or carriage returns) it was not quoted.
2646 This fix has been applied to the mysql and pgsql lookups by writing a
2647 separate quoting function and calling it from the lookup code. The fix
2648 should probably also be applied to nisplus, ibase and oracle lookups, but
2649 since I cannot test any of those, I have not disturbed their existing code.
2651 2. A hit in the callout cache for a specific address caused a log line with no
2652 reason for rejecting RCPT. Now it says "Previous (cached) callout
2653 verification failure".
2655 3. There was an off-by-one bug in the queryprogram router. An over-long
2656 return line was truncated at 256 instead of 255 characters, thereby
2657 overflowing its buffer with the terminating zero. As well as fixing this, I
2658 have increased the buffer size to 1024 (and made a note to document this).
2660 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2661 when Exim is waiting for an SMTP response from a remote server, Exim
2662 restarts its select() call on the socket, thereby resetting its timeout.
2663 This is not a problem when such interrupts are rare. Somebody set up a cron
2664 job to run exiwhat every 2 minutes, which is less than the normal select()
2665 timeout (5 or 10 minutes). This meant that the select() timeout never
2666 kicked in because it was always reset. I have fixed this by comparing the
2667 time when an interrupt arrives with the time at the start of the first call
2668 to select(). If more time than the timeout has elapsed, the interrupt is
2669 treated as a timeout.
2671 5. Some internal re-factoring in preparation for the addition of Sieve
2672 extensions (by MH). In particular, the "personal" test is moved to a
2673 separate function, and given an option for scanning Cc: and Bcc: (which is
2674 not set for Exim filters).
2676 6. When Exim created an email address using the login of the caller as the
2677 local part (e.g. when creating a From: or Sender: header line), it was not
2678 quoting the local part when it contained special characters such as @.
2680 7. Installed new OpenBSD configuration files.
2682 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2683 try to make them clearer.
2685 9. Callout options, other than the timeout value, were being ignored when
2686 verifying sender addresses in header lines. For example, when using
2688 verify = header_sender/callout=no_cache
2690 the cache was (incorrectly) being used.
2692 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2693 only the Cygwin environment.
2695 11. When return_path_on_delivery was set as a log selector, if different remote
2696 addresses in the same message used different return paths and parallel
2697 remote delivery occurred, the wrong values would sometimes be logged.
2698 (Whenever a remote delivery process finished, the return path value from
2699 the most recently started remote delivery process was logged.)
2701 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2702 lines when AUTH and/or TLS are in use. This is the "received protocol"
2703 field. Exim used to use "asmtp" for authenticated SMTP, without any
2704 indication (in the protocol name) for TLS use. Now it follows the RFC and
2705 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2706 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2707 names appear in log lines as well as in Received: header lines.
2709 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2710 extensions, and comparison tests, and to fix some bugs.
2712 14. Changes to the "personal" filter test:
2714 (1) The test was buggy in that it was just doing the equivalent of
2715 "contains" tests on header lines. For example, if a user's address was
2716 anne@some.where, the "personal" test would incorrectly be true for
2718 To: susanne@some.where
2720 This test is now done by extracting each address from the header in turn,
2721 and checking the entire address. Other tests that are part of "personal"
2722 are now done using regular expressions (for example, to check local parts
2723 of addresses in From: header lines).
2725 (2) The list of non-personal local parts in From: addresses has been
2726 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2727 taken from the Sieve specification recommendations.
2729 (3) If the message contains any header line starting with "List-" it is
2730 treated as non-personal.
2732 (4) The test for "circular" in the Subject: header line has been removed
2733 because it now seems ill-conceived.
2735 15. Minor typos in src/EDITME comments corrected.
2737 16. Installed latest exipick from John Jetmore.
2739 17. If headers_add on a router specified a text string that was too long for
2740 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2741 of string_sprintf() is now avoided.
2743 18. $message_body_size was not set (it was always zero) when running the DATA
2744 ACL and the local_scan() function.
2746 19. For the "mail" command in an Exim filter, no default was being set for
2747 the once_repeat time, causing a random time value to be used if "once" was
2748 specified. (If the value happened to be <= 0, no repeat happened.) The
2749 default is now 0s, meaning "never repeat". The "vacation" command was OK
2750 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2751 (I found it when inspecting the code).
2753 20. There is now an overall timeout for performing a callout verification. It
2754 defaults to 4 times the callout timeout, which applies to individual SMTP
2755 commands during the callout. The overall timeout applies when there is more
2756 than one host that can be tried. The timeout is checked before trying the
2757 next host. This prevents very long delays if there are a large number of
2758 hosts and all are timing out (e.g. when the network connections are timing
2759 out). The value of the overall timeout can be changed by specifying an
2760 additional sub-option for "callout", called "maxwait". For example:
2762 verify = sender/callout=5s,maxwait=20s
2764 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2765 to the end before writing, but this should make it even safer).
2767 22. Exim was forgetting that it had advertised PIPELINING for the second and
2768 subsequent messages on an SMTP connection. It was also not resetting its
2769 memory on STARTTLS and an internal HELO.
2771 23. When Exim logs an SMTP synchronization error within a session, it now
2772 records whether PIPELINING has been advertised or not.
2774 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2775 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2776 rather than long int.
2778 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2780 26. Added the never_mail option to autoreply.
2786 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2787 crash if the getsockname() call failed; this can happen if a connection is
2788 closed very soon after it is established. The problem was simply in the
2789 order in which certain operations were done, causing Exim to try to write
2790 to the SMTP stream before it had set up the file descriptor. The bug has
2791 been fixed by making things happen in the correct order.
2797 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2798 before the connection was closed, thus losing the rejection response.
2800 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2801 some early Solaris releases, but causes trouble in current releases where
2802 socklen_t is defined.
2804 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2807 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2810 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2811 that releasing the top of it at the end releases what was used for sub-
2812 expansions (unless the block got too big). However, discard this block if
2813 the first thing is a variable or header, so that we can use its block when
2814 it is dynamic (useful for very large $message_headers, for example).
2816 6. Lookups now cache *every* query, not just the most recent. A new, separate
2817 store pool is used for this. It can be recovered when all lookup caches are
2818 flushed. Lookups now release memory at the end of their result strings.
2819 This has involved some general refactoring of the lookup sources.
2821 7. Some code has been added to the store_xxx() functions to reduce the amount
2822 of flapping under certain conditions.
2824 8. log_incoming_interface used to affect only the <= reception log lines. Now
2825 it causes the local interface and port to be added to several more SMTP log
2826 lines, for example "SMTP connection from", and rejection lines.
2828 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2830 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2832 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2833 could be overwritten at the end of the current message (or the start of a
2834 new message if it was set in a HELO ACL). The value is now preserved for
2835 the duration of the SMTP connection.
2837 12. If a transport had a headers_rewrite setting, and a matching header line
2838 contained an unqualified address, that address was qualified, even if it
2839 did not match any rewriting rules. The underlying bug was that the values
2840 of the flags that permit the existence of unqualified sender and recipient
2841 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2842 non-local messages, and by -bnq for local messages) were not being
2843 preserved with the message after it was received.
2845 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2846 "next input=" as part of the text comprising the host identity instead of
2847 the correct text. The code was using the same buffer for two different
2848 strings. However, depending on which order the printing function evaluated
2849 its arguments, the bug did not always show up. Under Linux, for example, my
2850 test suite worked just fine.
2852 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2853 doesn't work with some older versions of Perl. It has been changed to "my",
2854 which in any case is probably the better facility to use.
2856 15. A really picky compiler found some instances of statements for creating
2857 error messages that either had too many or two few arguments for the format
2860 16. The size of the buffer for calls to the DNS resolver has been increased
2861 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2862 for addresses that have a lot of PTR records. This alleviates a problem; it
2863 does not fully solve it.
2865 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2866 buffer now truncates the list and logs the incident, which is the same
2867 action as happens when Exim is looking up a host name and its aliases.
2868 Previously in this situation something unpredictable would happen;
2869 sometimes it was "internal error: store_reset failed".
2871 18. If a server dropped the connection unexpectedly when an Exim client was
2872 using GnuTLS and trying to read a response, the client delivery process
2873 crashed while trying to generate an error log message.
2875 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2876 string, for example:
2878 warn message = H1: something\nH2: something
2880 the text was added as a single header line from Exim's point of view
2881 though it ended up OK in the delivered message. However, searching for the
2882 second and subsequent header lines using $h_h2: did not work. This has been
2883 fixed. Similarly, if a system filter added multiple headers in this way,
2884 the routers could not see them.
2886 20. Expanded the error message when iplsearch is called with an invalid key to
2887 suggest using net-iplsearch in a host list.
2889 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2890 ACLs are no longer actually imposed (and a message to that effect is
2893 22. If a "gecos" field in a passwd entry contained escaped characters, in
2894 particular, if it contained a \" sequence, Exim got it wrong when building
2895 a From: or a Sender: header from that name. A second bug also caused
2896 incorrect handling when an unquoted " was present following a character
2897 that needed quoting.
2899 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2900 was not being matched caselessly.
2902 24. Arranged for all hyphens in the exim.8 source to be escaped with
2905 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2906 properly. Recipient callout cache records were still being keyed to include
2907 the sender, even when use_sender was set false. This led to far more
2908 callouts that were necessary. The sender is no longer included in the key
2909 when use_sender is false.
2911 26. Added "control = submission" modifier to ACLs.
2913 27. Added the ${base62d: operator to decode base 62 numbers.
2915 28. dnsdb lookups can now access SRV records.
2917 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2918 the configuration file.
2920 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2921 (-v) mode. This makes the output for a verbose queue run more intelligible.
2923 31. Added a use_postmaster feature to recipient callouts.
2925 32. Added the $body_zerocount variable, containing the number of binary zero
2926 bytes in the message body.
2928 33. The time of last modification of the "new" subdirectory is now used as the
2929 "mailbox time last read" when there is a quota error for a maildir
2932 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2934 35. Added +ignore_unknown as a special item in host lists.
2936 36. Code for decoding IPv6 addresses in host lists is now included, even if
2937 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2938 address was recognized as an IP address, but was then not correctly decoded
2939 into binary, causing unexpected and incorrect effects when compared with
2946 1. Very minor rewording of debugging text in manualroute to say "list of
2947 hosts" instead of "hostlist".
2949 2. If verify=header_syntax was set, and a header line with an unqualified
2950 address (no domain) and a large number of spaces between the end of the
2951 name and the colon was received, the reception process suffered a buffer
2952 overflow, and (when I tested it) crashed. This was caused by some obsolete
2953 code that should have been removed. The fix is to remove it!
2955 3. When running in the test harness, delay a bit after writing a bounce
2956 message to get a bit more predictability in the log output.
2958 4. Added a call to search_tidyup() just before forking a reception process. In
2959 theory, someone could use a lookup in the expansion of smtp_accept_max_
2960 per_host which, without the tidyup, could leave open a database connection.
2962 5. Added the variables $recipient_data and $sender_data which get set from a
2963 lookup success in an ACL "recipients" or "senders" condition, or a router
2964 "senders" option, similar to $domain_data and $local_part_data.
2966 6. Moved the writing of debug_print from before to after the "senders" test
2969 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2970 problems for message scanning, either using a data ACL, or using
2971 local_scan() because the Received: header was not generated till after they
2972 were called (in order to set the time as the time of reception completion).
2973 I have revised the way this works. The header is now generated after the
2974 body is received, but before the ACL or local_scan() are called. After they
2975 are run, the timestamp in the header is updated.
2981 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2982 before starting a queue runner without re-exec. This happened only when
2983 deliver_drop_privilege was set or when the Exim user was set to root. The
2984 effect of the bug was that timeouts during subsequent deliveries caused
2985 crashes instead of being properly handled. The handler is now left at its
2986 default (and expected) setting.
2988 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2989 message, again when deliver_drop_privilege is set or Exim is run as root.
2990 The bug described in (1) was not present in this case, but the tidying up
2991 of the other signals was missing. I have made the two cases consistent.
2993 3. The ignore_target_hosts setting on a manualroute router was being ignored
2994 for hosts that were looked up using the /MX notation.
2996 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2999 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3000 operated on the sender address. After changing the $sender_address to <>
3001 for the sender address verify, Exim was re-instated it as the original
3002 (before rewriting) address, but remembering that it had rewritten it, so it
3003 wasn't rewriting it again. This bug also had the effect of breaking the
3004 sender address verification caching when the sender address was rewritten.
3006 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3007 This has been changed so that if the ip literal address matches
3008 ignore_target_hosts, the router declines.
3010 7. Added expansion conditions match_domain, match_address, and match_local_
3011 part (NOT match_host).
3013 8. The placeholder for the Received: header didn't have a length field set.
3015 9. Added code to Exim itself and to exim_lock to test for a specific race
3016 condition that could lead to file corruption when using MBX delivery. The
3017 issue is with the lockfile that is created in /tmp. If this file is removed
3018 after a process has opened it but before that process has acquired a lock,
3019 there is the potential for a second process to recreate the file and also
3020 acquire a lock. This could lead to two Exim processes writing to the file
3021 at the same time. The added code performs the same test as UW imapd; it
3022 checks after acquiring the lock that its file descriptor still refers to
3023 the same named file.
3025 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3026 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3029 11. Added the smtp_active_hostname option. If used, this will typically be made
3030 to depend on the incoming interface address. Because $interface_address is
3031 not set up until the daemon has forked a reception process, error responses
3032 that can happen earlier (such as "too many connections") no longer contain
3035 12. If an expansion in a condition on a "warn" statement fails because a lookup
3036 defers, the "warn" statement is abandoned, and the next ACL statement is
3037 processed. Previously this caused the whole ACL to be aborted.
3039 13. Added the iplsearch lookup type.
3041 14. Added ident_timeout as a log selector.
3043 15. Added tls_certificate_verified as a log selector.
3045 16. Added a global option tls_require_ciphers (compare the smtp transport
3046 option of the same name). This controls incoming TLS connections.
3048 17. I finally figured out how to make tls_require_ciphers do a similar thing
3049 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3050 before starting the TLS session.
3052 18. Tabs are now shown as \t in -bP output.
3054 19. If the log selector return_path_on_delivery was set, Exim crashed when
3055 bouncing a message because it had too many Received: header lines.
3057 20. If two routers both had headers_remove settings, and the first one included
3058 a superfluous trailing colon, the final name in the first list and the
3059 first name in the second list were incorrectly joined into one item (with a
3060 colon in the middle).
3066 1. Added -C and -D options to the exinext utility, mainly to make it easier
3067 to include in the automated testing, but these could be helpful when
3068 multiple configurations are in use.
3070 2. The exinext utility was not formatting the output nicely when there was
3071 an alternate port involved in the retry record key, nor when there was a
3072 message id as well (for retries that were specific to a specific message
3073 and a specific host). It was also confused by IPv6 addresses, because of
3074 the additional colons they contain. I have fixed the IPv4 problem, and
3075 patched it up to do a reasonable job for IPv6.
3077 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3078 delivery, the log line now contains "pipelined" if PIPELINING was used.
3080 4. An SMTP transport process used to panic and die if the bind() call to set
3081 an explicit outgoing interface failed. This has been changed; it is now
3082 treated in the same way as a connect() failure.
3084 5. A reference to $sender_host_name in the part of a conditional expansion
3085 that was being skipped was still causing a DNS lookup. This no longer
3088 6. The def: expansion condition was not recognizing references to header lines
3089 that used bh_ and bheader_.
3091 7. Added the _cache feature to named lists.
3093 8. The code for checking quota_filecount in the appendfile transport was
3094 allowing one more file than it should have been.
3096 9. For compatibility with Sendmail, the command line option
3104 and sets the incoming protocol and host name (for trusted callers). The
3105 host name and its colon can be omitted when only the protocol is to be set.
3106 Note the Exim already has two private options, -pd and -ps, that refer to
3107 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3108 "s", but I don't think that's a major issue.
3110 10. A number of refactoring changes to the code, none of which should affect
3113 (a) The number of logging options was getting close to filling up the
3114 32-bit word that was used as a bit map. I have split them into two classes:
3115 those that are passed in the argument to log_write(), and those that are
3116 only ever tested independently outside of that function. These are now in
3117 separate 32-bit words, so there is plenty of room for expansion again.
3118 There is no change in the user interface or the logging behaviour.
3120 (b) When building, for example, log lines, the code previously used a
3121 macro that called string_cat() twice, in order to add two strings. This is
3122 not really sufficiently general. Furthermore, there was one instance where
3123 it was actually wrong because one of the argument was used twice, and in
3124 one call a function was used. (As it happened, calling the function twice
3125 did not affect the overall behaviour.) The macro has been replaced by a
3126 function that can join an arbitrary number of extra strings onto a growing
3129 (c) The code for expansion conditions now uses a table and a binary chop
3130 instead of a serial search (which was left over from when there were very
3131 few conditions). Also, it now recognizes conditions like "pam" even when
3132 the relevant support is not compiled in: a suitably worded error message is
3133 given if an attempt is made to use such a condition.
3135 11. Added ${time_interval:xxxxx}.
3137 12. A bug was causing one of the ddress fields not to be passed back correctly
3138 from remote delivery subprocesses. The field in question was not being
3139 subsequently used, so this caused to problems in practice.
3141 13. Added new log selectors queue_time and deliver_time.
3143 14. Might have fixed a bug in maildirsizefile handling that threw up
3144 "unexpected character" debug warnings, and recalculated the data
3145 unnecessarily. In any case, I expanded the warning message to give more
3148 15. Added the message "Restricted characters in address" to the statements in
3149 the default ACL that block characters like @ and % in local parts.
3151 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3152 Three changes have been made:
3154 (a) There was a serious bug; a negative response to MAIL caused the whole
3155 recipient domain to be cached as invalid, thereby blocking all messages
3156 to all local parts at the same domain, from all senders. This bug has
3157 been fixed. The domain is no longer cached after a negative response to
3158 MAIL if the sender used is not empty.
3160 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3163 (c) A new callout option, "use_sender" has been added for people who want
3164 the modified behaviour.
3170 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3173 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3174 indeed breaks things for older releases.
3176 3. Added additional logging to the case where there is a problem reading data
3177 from a filter that is running in a subprocess using a pipe, in order to
3178 try to track down a specific problem.
3180 4. Testing facility fudge: when running in the test harness and attempting
3181 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3182 getting "No route to host". Convert this to a timeout.
3184 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3187 6. Some OS don't have socklen_t but use size_t instead. This affects the
3188 fifth argument of getsockopt() amongst other things. This is now
3189 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3190 can be set for individual OS. I have set it for SunOS5, OSF1, and
3191 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3192 some earlier ones do not.
3194 7. Change 4.30/15 was not doing the test caselessly.
3196 8. The standard form for an IPv6 address literal was being rejected by address
3197 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3198 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3199 this, as well as the form without the "IPv6" on the front (but only when
3200 address literals are enabled, of course).
3202 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3204 10. Exim crashed if a message with an empty sender address specified by -f
3205 encountered a router with an errors_to setting. This could be provoked only
3206 by a command such as
3210 where an empty string was supplied; "<>" did not hit this bug.
3212 11. Installed PCRE release 4.5.
3214 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3215 remained set. It is now erased.
3217 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3218 times from message ids (which are base 36 rather than the normal 62).
3220 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3221 were being counted as actual protocol errors, and logged if the log
3222 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3223 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3224 and DATA following a set of rejected RCPTs do not count as protocol errors.
3225 In other words, Exim assumes they were pipelined, though this may not
3226 actually be the case. Of course, in all cases the client gets an
3227 appropriate error code.
3229 15. If a lookup fails in an ACL condition, a message about the failure may
3230 be available; it is used if testing the ACL cannot continue, because most
3231 such messages specify what the cause of the deferral is. However, some
3232 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3233 that caused an old message to be retained and used if a later statement
3234 caused a defer, replacing the real cause of the deferral.
3236 16. If an IP address had so many PTR records that the DNS lookup buffer
3237 was not large enough to hold them, Exim could crash while trying to process
3238 the truncated data. It now detects and logs this case.
3240 17. Further to 4.21/58, another change has been made: if (and only if) the
3241 first line of a message (the first header line) ends with CRLF, a bare LF
3242 in a subsequent header line has a space inserted after it, so as not to
3243 terminate the header.
3245 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3246 unnecessarily, used atoi() instead of strtol(), and didn't check the
3247 termination when getting file sizes from file names by regex.
3249 19. Completely re-implemented the support for maildirsize files, in the light
3250 of a number of problems with the previous contributed implementation
3251 (4.30/29). In particular:
3253 . If the quota is zero, the maildirsize file is maintained, but no quota is
3256 . If the maildir directory does not exist, it is created before any attempt
3257 to write a maildirsize file.
3259 . The quota value in the file is just a cache; if the quota is changed in
3260 the transport, the new value overrides.
3262 . A regular expression is available for excluding directories from the
3265 20. The autoreply transport checks the characters in options that define the
3266 message's headers; it allows continued headers, but it was checking with
3267 isspace() after an embedded newline instead of explicitly looking for a
3270 21. If all the "regular" hosts to which an address was routed had passed their
3271 expiry times, and had not reached their retry times, the address was
3272 bounced, even if fallback hosts were defined. Now Exim should go on to try
3275 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3276 equivalent code in the SMTP transport. Some hosts send humungous responses
3277 to HELO/EHLO, more than 1024 it seems.
3279 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3280 gives compiler warnings in some environments. I've now done it "properly",
3283 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3284 (because of problems with the built-in one) was declared to return uschar *
3285 instead of char *, causing compiler failure.
3287 25. Fixed a file descriptor leak when processing alias/forward files.
3289 26. Fixed a minor format string issue in dbfn.c.
3291 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3293 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3294 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3297 29. When a sender address is verified, it is cached, to save repeating the test
3298 when there is more than one recipient in a message. However, when the
3299 verification involves a callout, it is possible for different callout
3300 options to be set for different recipients. It is too complicated to keep
3301 track of this in the cache, so now Exim always runs a verification when a
3302 callout is required, relying on the callout cache for the optimization.
3303 The overhead is duplication of the address routing, but this should not be
3306 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3307 to be verified with callout=postmaster, and the main callout worked but the
3308 postmaster check failed, the verification correctly failed. However, if a
3309 subsequent RCPT command asked for sender verification *without* the
3310 postmaster check, incorrect caching caused this verification also to fail,
3313 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3314 it was not caching the DNS options (qualify_single, search_parents) that
3315 were used when the lookup failed. A subsequent lookup with different
3316 options therefore always gave the same answer, though there were cases
3317 where it should not have. (Example: a "domains = !$mx_any" option on a
3318 dnslookup router: the "domains" option is always processed without any
3319 widening, but the router might have qualify_single set.) Now Exim uses the
3320 cached value only when the same options are set.
3322 32. Added John Jetmore's "exipick" utility to the distribution.
3324 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3325 than a timeout (e.g. a certificate is required, and is not provided), an
3326 Exim server now closes the connection immediately. Previously it waited for
3327 the client to close - but if the client is SSL, it seems that they each
3328 wait for each other, leading to a delay before one of them times out.
3330 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3331 maintained 0.8.x compatibility because I don't think many are using it, and
3332 it is clearly obsolete.
3334 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3337 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3338 client certificate was expired. A simple patch fixes this, though I don't
3339 understand the full logic of why the verify callback is called multiple
3342 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3343 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3344 which causes problems with some clients (such as the Certicom SSL Plus
3345 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3346 disables the coutermeasure allowing Eudora to connect."
3348 38. Exim was not checking that a write() to a log file succeeded. This could
3349 lead to Bad Things if a log got too big, in particular if it hit a file
3350 size limit. Exim now panics and dies if it cannot write to a log file, just
3351 as it does if it cannot open a log file.
3353 39. Modified OS/Makefile-Linux so that it now contains
3355 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3357 The two -D definitions ensure that Exim is compiled with large file
3358 support, which makes it possible to handle log files that are bigger than
3361 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3362 instance) a domain was checked against a named list that involved a lookup,
3363 causing $domain_data to be set, then another domain was checked against the
3364 same list, then the first domain was re-checked, the value of $domain_data
3365 after the final check could be wrong. In particular, if the second check
3366 failed, it could be set empty. This bug probably also applied to
3369 41. The strip_trailing_dot option was not being applied to the address given
3370 with the -f command-line option.
3372 42. The code for reading a message's header from the spool was incrementing
3373 $received_count, but never initializing it. This meant that the value was
3374 incorrect (doubled) while delivering a message in the same process in which
3375 it was received. In the most common configuration of Exim, this never
3376 happens - a fresh exec is done - but it can happen when
3377 deliver_drop_privilege is set.
3379 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3380 it now includes up to 150 characters of the unexpected data in the log
3383 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3384 and building data strings. The size of both of these buffers was 10 000
3385 bytes - far larger than anybody would *ever* want, thought I. Needless to
3386 say, somebody hit the limit. I have increased the maximum line length to
3387 20 000 and the maximum data length of concatenated lines to 100 000. I have
3388 also fixed two bugs, because there was no checking on these buffers. Tsk,
3389 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3390 buffer is too small.
3392 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3393 lsearch lookups. Now it does.
3395 46. When parsing a route_list item in a manualroute router, a fixed-length
3396 buffer was used for the list of hosts. I made this 1024 bytes long,
3397 thinking that nobody would ever have a list of hosts that long. Wrong.
3398 Somebody had a whole pile of complicated expansion conditions, and the
3399 string was silently truncated, leading to an expansion error. It turns out
3400 that it is easier to change to an unlimited length (owing to other changes
3401 that have happened since this code was originally written) than to build
3402 structure for giving a limitation error. The length of the item that
3403 expands into the list of hosts is now unlimited.
3405 47. The lsearch lookup could not handle data where the length of text line was
3406 more than 4095 characters. Such lines were truncated, leading to shortened
3407 data being returned. It should now handle lines of any length.
3409 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3410 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3413 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3414 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3415 no longer happens in comment lines. A list of replacements is now placed
3416 at the head of all of the source files, except those whose only change is
3417 to replace PERL_COMMAND in the very first #! line.
3419 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3420 messages on the queue, with a bottom-up merge sort, using code contributed
3421 by Michael Haardt. This should make operations like -bp somewhat faster on
3422 large queues. It won't affect queue runners, except when queue_run_in_order
3425 51. Installed eximstats 1.31 in the distribution.
3427 52. Added support for SRV lookups to the dnslookup router.
3429 53. If an ACL referred to $message_body or $message_body_end, the value was not
3430 reset for any messages that followed in the same SMTP session.
3432 54. The store-handling optimization for building very long strings was not
3433 differentiating between the different store pools. I don't think this
3434 actually made any difference in practice, but I've tidied it.
3436 55. While running the routers to verify a sender address, $sender_address
3437 was still set to the sender address. This is wrong, because when routing to
3438 send a bounce to the sender, it would be empty. Therefore, I have changed
3439 it so that, while verifying a sender address, $sender_address is set to <>.
3440 (There is no change to what happens when verifying a recipient address.)
3442 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3443 target A or AAAA records (if not already returned) without resetting the
3444 qualify_single or search_parents options of the DNS resolver. These are
3445 inappropriate in this case because the targets of MX and SRV records must
3446 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3447 target that, when qualified, matched something in the local domain. These
3448 two options are now turned off when doing these lookups.
3450 57. It seems that at least some releases of Reiserfs (which does not have the
3451 concept of a fixed number of inodes) returns zero and not -1 for the
3452 number of available inodes. This interacted badly with check_spool_inodes,
3453 which assumed that -1 was the "no such thing" setting. What I have done is
3454 to check that the total number of inodes is greater than zero before doing
3455 the test of how many are available.
3457 58. When a "warn" ACL statement has a log_message modifier, the message is
3458 remembered, and not repeated. This is to avoid a lot of repetition when a
3459 message has many recipients that cause the same warning to be written.
3460 Howewer, Exim was preserving the list of already written lines for an
3461 entire SMTP session, which doesn't seem right. The memory is now reset if a
3462 new message is started.
3464 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3465 debugging output unless log_rewrite was also set.
3467 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3468 of (int)(handle) when we know that handle contains (void *)(-1).
3470 61. The Exim daemon panic-logs an error return when it closes the incoming
3471 connection. However "connection reset by peer" seems to be common, and
3472 isn't really an error worthy of noting specially, so that particular error
3475 62. When Exim is trying to find all the local interfaces, it used to panic and
3476 die if the ioctl to get the interface flags failed. However, it seems that
3477 on at least one OS (Solaris 9) it is possible to have an interface that is
3478 included in the list of interfaces, but for which you get a failure error
3479 for this call. This happens when the interface is not "plumbed" into a
3480 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3481 failure of the "get flags" call assumes that the interface is down.
3483 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3484 makes life easier for people who are doing arithmetic on fields extracted
3485 from dates, where you often get leading zeros that should not be
3486 interpreted as octal.
3488 64. Added qualify_domain to the redirect router, to override the global
3491 65. If a pathologically long header line contained very many addresses (the
3492 report of this problem mentioned 10 000) and each of them was rewritten,
3493 Exim could use up a very large amount of memory. (It kept on making new
3494 copies of the header line as it rewrote, and never released the old ones.)
3495 At the expense of a bit more processing, the header rewriting function has
3496 been changed so that it no longer eats memory in this way.
3498 66. The generation of the Received: header has been moved from the time that a
3499 message starts to be received, to the time that it finishes. The timestamp
3500 in the Received: header should now be very close to that of the <= log
3501 line. There are two side-effects of this change:
3503 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3504 logged header lines no longer include the local Received: line, because
3505 it has not yet been created. The same applies to a copy of the message
3506 that is returned to a non-SMTP sender when a message is rejected.
3508 (b) When a filter file is tested using -bf, no additional Received: header
3509 is added to the test message. After some thought, I decided that this
3512 This change does not affect the value of $received_for. It is still set
3513 after address rewriting, but before local_scan() is called.
3515 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3517 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3518 gave an unhelpful panic error message, and a defer error. I have managed to
3519 change this behaviour so that it now rejects any supplied certificate,
3520 which seems right, as the list of acceptable certificates is empty.
3522 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3523 gave an unhelpful defer error. I have not managed to make this reject any
3524 supplied certificates, but the error message it gives is "no certificate
3525 supplied", which is not helpful.
3527 70. exigrep's output now also includes lines that are not associated with any
3528 message, but which match the given pattern. Implemented by a patch from
3529 Martin Sluka, which also tidied up the Perl a bit.
3531 71. Recipient callout verification, like sender verification, was using <> in
3532 the MAIL FROM command. This isn't really the right thing, since the actual
3533 sender may affect whether the remote host accepts the recipient or not. I
3534 have changed it to use the actual sender in the callout; this means that
3535 the cache record is now keyed on a recipient/sender pair, not just the
3536 recipient address. There doesn't seem to be a real danger of callout loops,
3537 since a callout by the remote host to check the sender would use <>.
3538 [SEE ABOVE: changed after hitting problems.]
3540 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3541 temporary errors. However, in the case of such a code being given after
3542 the end of a data transmission (i.e. after ".") Exim was failing to write
3543 a retry record for the message. (Yes, there was some broken host that was
3544 actually sending 8xx at this point.)
3546 73. An unknown lookup type in a host list could cause Exim to panic-die when
3547 the list was checked. (An example that provoked this was putting <; in the
3548 middle of a list instead of at the start.) If this happened during a DATA
3549 ACL check, a -D file could be left lying around. This kind of configuration
3550 error no longer causes Exim to die; instead it causes a defer errror. The
3551 incident is still logged to the main and panic logs.
3553 74. Buglet left over from Exim 3 conversion. The message "too many messages
3554 in one connection" was written to the rejectlog but not the mainlog, except
3555 when address rewriting (yes!) was being logged.
3557 75. Added write_rejectlog option.
3559 76. When a system filter was run not as root (that is, when system_filter_user
3560 was set), the values of the $n variables were not being returned to the
3561 main process; thus, they were not subsequently available in the $sn
3564 77. Added +return_path_on_delivery log selector.
3566 78. A connection timeout was being treated differently from recipients deferred
3567 when testing hosts_max_try with a message that was older than the host's
3568 retry timeout. (The host should not be counted, thus allowing all hosts to
3569 be tried at least once before bouncing.) This may have been the cause of an
3570 occasionally reported bug whereby a message would remain on the queue
3571 longer than the retry timeout, but would be bounced if a delivery was
3572 forced. I say "may" because I never totally pinned down the problem;
3573 setting up timeout/retry tests is difficult. See also the next item.
3575 79. The ultimate address timeout was not being applied to errors that involved
3576 a combination of host plus message (for example, a timeout on a MAIL
3577 command). When an address resolved to a number of possible hosts, and they
3578 were not all tried for each delivery (e.g. because of hosts_max_try), a
3579 message could remain on the queue longer than the retry timeout.
3581 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3584 81. Fixed an obscure SMTP outgoing bug which required at least the following
3585 conditions: (a) there was another message waiting for the same server;
3586 (b) the server returned 5xx to all RCPT commands in the first message so
3587 that the message was not completed; (c) the server dropped the connection
3588 or gave a negative response to the RSET that Exim sends to abort the
3589 transaction. The observed case was a dropped connection after DATA that had
3590 been sent in pipelining mode. That is, the server had advertised PIPELINING
3591 but was not implementing it correctly. The effect of the bug was incorrect
3592 behaviour, such as trying another host, and this could lead to a crash.
3598 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3599 and daemon.c were passed as pointers to ints; they should have been
3600 pointers to socklen_t variables (which are typically unsigned ints).
3602 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3605 3. Fixed a really odd bug that affected only the testing scheme; patching a
3606 certain fixed string in the binary changed the value of another string that
3607 happened to be identical to the end of the original first string.
3609 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3610 name", it returns that address as the IP address. On some operating
3611 systems (e.g. Solaris), it also passes back the IP address string as the
3612 "host name". However, on others (e.g. Linux), it passes back an empty
3613 string. Exim wasn't checking for this, and was changing the host name to an
3614 empty string, assuming it had been canonicized.
3616 5. Although rare, it is permitted to have more than one PTR record for a given
3617 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3618 all the names associated with an address, because they do in Solaris.
3619 However, it seems that they do not in Linux for data that comes from the
3620 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3621 I found this out when I moved to a new Linux workstation and tried to run
3622 the Exim test suite.
3624 To get round this problem I have changed the code so that it now does its
3625 own call to the DNS to look up PTR records when searching for a host name.
3626 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3627 addresses that are only in /etc/hosts are still found.
3629 This behaviour is, however, controlled by an option called host_lookup_
3630 order, which defaults to "bydns:byaddr". If people want to use the other
3631 order, or indeed, just use one or the other means of lookup, they can
3632 specify it in this variable.
3634 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3635 some operating systems, this comes back from gethostbyaddr() as an empty
3636 string, and this is what Exim used to test for. However, it seems that in
3637 other systems, "." is yielded. Exim now tests for this case too.
3639 7. The values of check_spool_space and check_log_space are now held internally
3640 as a number of kilobytes instead of an absolute number of bytes. If a
3641 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3642 kilobyte. This means that much larger values can be stored.
3644 8. Exim monitor: an attempt to get the action menu when not actually pointing
3645 at a message produces an empty menu entitled "No message selected". This
3646 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3647 no entries in it ("Shell widget menu has zero width and/or height"). So I
3648 have added a single, blank menu entry in this case.
3650 9. Added ${quote_local_part.
3652 10. MIME decoding is now applied to the contents of Subject: header lines when
3655 11. Now that a reference to $sender_host_address automatically causes a reverse
3656 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3657 host lookup before query-style lookups in lists that might use this
3658 variable. This has therefore been abolished, and the "net-" prefix is no
3659 longer necessary for query-style lookups.
3661 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3662 have been a typo for LFLAGS, so it has been changed.
3664 13. The install script calls Exim with "-C /dev/null" in order to find the
3665 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3666 to be output. Howeve, since Exim outputs its version number before the
3667 error, it didn't break the script. It just looked ugly. I fixed this by
3668 always allowing "-C /dev/null" if the caller is root.
3670 14. Ignore overlarge ACL variable number when reading spool file - insurance
3671 against a later release with more variables having written the file.
3673 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3674 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3675 this, as well as the form without the "IPv6" on the front.
3677 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3678 OS/Makefile-Darwin file.
3680 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3681 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3683 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3684 variable. However, some OS use ints for inodes. I've added cast to long int
3685 to get rid of the compiler warning.
3687 19. I had forgotten to lock out "/../" in configuration file names when
3688 ALT_CONFIG_PREFIX was set.
3690 20. Routers used for verification do not need to specify transports. However,
3691 if such a router generated a host list, and callout was configured, Exim
3692 crashed, because it could not find a port number from the (non-existent)
3693 transport. It now assumes port 25 in this circumstance.
3695 21. Added the -t option to exigrep.
3697 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3698 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3699 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3700 them is set, LOOKUP_LSEARCH is forced.
3702 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3704 24. Added sender and host information to the "rejected by local_scan()" log
3705 line; previously there was no indication of these.
3707 25. Added .include_if_exists.
3709 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3710 Linux. It turns out that not all file systems support this. Apparently some
3711 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3712 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3713 not supported on the file descriptor, is now ignored when Exim is trying to
3714 sync a directory. This applies only to Linux.
3716 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3718 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3719 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3722 29. Added support for maildirsize files from supplied patch (modified a bit).
3724 30. The use of :fail: followed by an empty string could lead Exim to respond to
3725 sender verification failures with (e.g.):
3727 550 Verification failed for <xxx>
3728 550 Sender verify failed
3730 where the first response line was missing the '-' that indicates it is not
3731 the final line of the response.
3733 31. The loop for finding the name of the user that called Exim had a hardwired
3734 limit of 10; it now uses the value of finduser_retries, which is used for
3735 all other user lookups.
3737 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3740 33. Exim was neglecting to zero errno before one call of strtol() when
3741 expanding a string and expecting an integer value. On some systems this
3742 resulted in spurious "integer overflow" errors. Also, it was casting the
3743 result into an int without checking.
3745 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3746 did not work. The code looks as if it has *never* worked, though it appears
3747 to have been documented since at least releast 1.62. I have made it work.
3749 35. The "timeout_DNS" error in retry rules, also documented since at least
3750 1.62, also never worked. As it isn't clear exactly what this means, and
3751 clearly it isn't a major issue, I have abolished the feature by treating it
3752 as "timeout", and writing a warning to the main and panic logs.
3754 36. The display of retry rules for -brt wasn't always showing the error code
3757 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3758 timeout_connect_A, timeout_connect_MX.
3760 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3761 to the empty sender.
3763 39. The daemon was not analysing the content of -oX till after it had closed
3764 stderr and disconnected from the controlling terminal. This meant that any
3765 syntax errors were only noted on the panic log, and the return code from
3766 the command was 0. By re-arranging the code a little, I've made the
3767 decoding happen first, so such errors now appear on stderr, and the return
3768 code is 1. However, the actual setting up of the sockets still happens in
3769 the disconnected process, so errors there are still only recorded on the
3772 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3773 connections (as happens on some IP stacks) was logged at start up time as
3774 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3775 it from "IPv6 and IPv4", which means that two separate sockets are being
3778 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3779 says whether AF_INET or AF_INET6 was passed as an argument.
3781 42. Exiwhat output was messed up when time zones were included in log
3784 43. Exiwhat now gives more information about the daemon's listening ports,
3785 and whether -tls-on-connect was used.
3787 44. The "port" option of the smtp transport is now expanded.
3789 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3790 silently ignored. Now an error message is written to the main and panic
3793 46. There's a new ACL modifier called "logwrite" which writes to a log file
3794 as soon as it is encountered.
3796 47. Added $local_user_uid and $local_user_gid at routing time.
3798 48. Exim crashed when trying to verify a sender address that was being
3801 49. Exim was recognizing only a space character after ".include". It now also
3802 recognizes a tab character.
3804 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3805 extracting the relevant information from the specification. The man page no
3806 longer contains scrambled data for the -d option, and I've added a section
3807 at the front about calling Exim under different names.
3809 51. Added "extra_headers" argument to the "mail" command in filter files.
3811 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3814 53. Installed eximstats 1.29.
3816 54. Added transport_filter_timeout as a generic transport option.
3818 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3819 Cc: header lines. This was required by RFC 822, but it not required by RFC
3822 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3823 incoming messages that did not have them. Now it does so only if the
3824 message originates locally, that is, if there is no associated remote host
3825 address. When Resent- header lines are present, this applies to the Resent-
3826 lines rather than the non-Resent- lines.
3828 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3829 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3831 58. Messages for configuration errors now include the name of the main
3832 configuration file - useful now that there may be more than one file in a
3833 list (.included file names were always shown).
3835 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3836 for those rare installations that do not start the daemon as root or run it
3837 setuid root. I've cut out the call to initgroups() if the daemon is not
3840 60. The Exim user and group can now be bound into the binary as text strings
3841 that are looked up at the start of Exim's processing.
3843 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3845 62. Added $mailstore_basename variable.
3847 63. Installed patch to sieve.c from Michael Haardt.
3849 64. When Exim failed to open the panic log after failing to open the main log,
3850 the original message it was trying to log was written to stderr and debug
3851 output, but if they were not available (the usual case in production), it
3852 was lost. Now it is written to syslog before the two lines that record the
3853 failures to open the logs.
3855 65. Users' Exim filters run in subprocesses under the user's uid. It is
3856 possible for a "deliver" command or an alias in a "personal" command to
3857 provoke an address rewrite. If logging of address rewriting is configured,
3858 this fails because the process is not running as root or exim. There may be
3859 a better way of dealing with this, but for the moment (because 4.30 needs
3860 to be released), I have disabled address rewrite logging when running a
3861 filter in a non-root, non-exim process.
3867 1. The buildconfig auxiliary program wasn't quoting the value set for
3868 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3869 not defined. This bug was masked in 4.22 by the effect that was fixed in
3872 2. Some messages that were rejected after a message id was allocated were
3873 shown as "incomplete" by exigrep. It no longer does this for messages that
3874 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3876 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3877 have allow_domain_literals set, the ID did not get logged in the <= line.
3878 Domain literals are now always recognized in Message-ID: header lines.
3880 4. The first argument for a ${extract expansion item is the key name or field
3881 number. Leading and trailing spaces in this item were not being ignored,
3882 causing some misleading effects.
3884 5. When deliver_drop_privilege was set, single queue runner processes started
3885 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3886 same command in the process it spins off) were not dropping privilege.
3888 6. When the daemon running as "exim" started a queue runner, it always
3889 re-executed Exim in the spun-off process. This is a waste of effort when
3890 deliver_drop_privilege is set. The new process now just calls the
3891 queue-runner function directly.
3897 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3900 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3901 ignored. Though the use of -oP was forcing the writing of a pid file, it
3902 was always written to the default place.
3904 3. If the message "no IP address found for host xxxx" is generated during
3905 incoming verification, it is now followed by identification of the incoming
3906 connection (so you can more easily find what provoked it).
3908 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3910 5. Added some features to "harden" Exim a bit more against certain attacks:
3912 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3913 be put in Local/Makefile. This is like the never_users runtime option,
3914 but it cannot be overridden. The default setting is "root".
3916 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3917 prefix string with which any file named in a -C command line option
3920 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3921 is retained for -C and -D only if the caller of Exim is root. Without
3922 it, the exim user may also use -C and -D and retain privilege.
3924 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3925 command line option is disabled.
3927 6. Macro names set by the -D option must start with an upper case letter, just
3928 like macro names defined in the configuration file.
3930 7. Added "dereference=" facility to LDAP.
3932 8. Two instances of the typo "uknown" in the source files are fixed.
3934 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3935 the Configure-Makefile script screwed up while processing it.
3937 10. Incorporated PCRE 4.4.
3939 11. The SMTP synchronization check was not operating right at the start of an
3940 SMTP session. For example, it could not catch a HELO sent before the client
3941 waited for the greeting. There is now a check for outstanding input at the
3942 point when the greeting is written. Because of the duplex, asynchronous
3943 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3944 way, but not yet received, when the check is performed.
3946 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3947 on TCP/IP sockets, because this apparently causes some broken clients to
3950 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3951 unchanged) from the Cygwin maintainer.
3953 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3954 was supported instead of testing for mbx. Effectively a typo.
3956 15. The spa authenticator server code was not checking that the input it
3957 received was valid base64.
3959 16. The debug output line for the "set" modifier in ACLs was not showing the
3960 name of the variable that was being set.
3962 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3964 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3965 lookup on its own. Something else was needed to trigger the lookup. For
3966 example, a match in host_lookup or the need for a host name in a host list.
3967 Now, if $sender_host_name is referenced and the host name has not yet been
3968 looked up, a lookup is performed. If the lookup fails, the variable remains
3969 empty, and $host_lookup_failed is set to "1".
3971 19. Added "eqi" as a case-independent comparison operator.
3973 20. The saslauthd authentication condition could segfault if neither service
3974 nor realm was specified.
3976 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3977 error message that was logged was misleading, and incoming SMTP
3978 connections were dropped. The message is now more accurate, and temporary
3979 errors are given to SMTP connections.
3981 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3982 (except RSET) with a 421 error, until QUIT is received. However, it was
3983 failing to send a response to QUIT.
3985 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3986 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3987 ACL is now run after the helo_try_verify_hosts code.
3989 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3990 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3991 case-independent, so other case variants are also recognized). Apparently
3992 some systems use these upper case variants.
3994 25. If more than two messages were waiting for the same host, and a transport
3995 filter was specified for the transport, Exim sent two messages over the
3996 same TCP/IP connection, and then failed with "socket operation on non-
3997 socket" when it tried to send the third.
3999 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4001 27. The extern definition of crypt16() in expand.c was not being excluded when
4002 the OS had its own crypt16() function.
4004 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4005 as a preferred synonym for return_size_limit, both as an option and as an
4008 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4010 30. Changed the default configuration ACL to relax the local part checking rule
4011 for addresses that are not in any local domains. For these addresses,
4012 slashes and pipe symbols are allowed within local parts, but the sequence
4013 /../ is explicitly forbidden.
4015 31. SPA server authentication was not clearing the challenge buffer before
4018 32. log_message in a "warn" ACL statement was writing to the reject log as
4019 well as to the main log, which contradicts the documentation and doesn't
4020 seem right (because no rejection is happening). So I have stopped it.
4022 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4023 However, I am unable to do any testing of this.
4025 34. Fixed an infelicity in the appendfile transport. When checking directories
4026 for a mailbox, to see if any needed to be created, it was accidentally
4027 using path names with one or more superfluous leading slashes; tracing
4028 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4030 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4031 contents are added to the log line that is written for every discarded
4032 recipient. (Previously a log_message setting was ignored.)
4034 36. The ${quote: operator now quotes the string if it is empty.
4036 37. The install script runs exim in order to find its version number. If for
4037 some reason other than non-existence or emptiness, which it checks, it
4038 could not run './exim', it was installing it with an empty version number,
4039 i.e. as "exim-". This error state is now caught, and the installation is
4042 38. An argument was missing from the function that creates an error message
4043 when Exim fails to connect to the socket for saslauthd authentication.
4044 This could cause Exim to crash, or give a corrupted message.
4046 39. Added isip, isip4, and isip6 to ${if conditions.
4048 40. The ACL variables $acl_xx are now saved with the message, and can be
4049 accessed later in routers, transports, and filters.
4051 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4052 strings in the file are not string-expanded.
4054 42. If a MAIL command specified a SIZE value that was too large to fit into an
4055 int variable, the check against message_size_limit failed. Such values are
4056 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4057 day this will have to be increased, but I don't think I want to be around
4058 when emails are that large.
4065 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4066 iconv() is not standard in FreeBSD.
4068 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4069 IPv6 enabled. The observed symptom was a segmentation fault on return from
4070 the function os_common_find_running_interfaces() in src/os.c.
4072 3. In the check_special_case() function in daemon.c I had used "errno" as an
4073 argument name, which causes warnings on some systems. This was basically a
4074 typo, since it was named "eno" in the comments!
4076 4. The code that waits for the clock to tick (at a resolution of some fraction
4077 of a second) so as to ensure message-id uniqueness was always waiting for
4078 at least one whole tick, when it could have waited for less. [This is
4079 almost certainly not relevant at current processor speeds, where it is
4080 unlikely to ever wait at all. But we try to future-proof.]
4082 5. The function that sleeps for a time interval that includes fractions of a
4083 second contained a race. It did not block SIGALRM between setting the
4084 timer, and suspending (a couple of lines later). If the interval was short
4085 and the sigsuspend() was delayed until after it had expired, the suspension
4086 never ended. On busy systems this could lead to processes getting stuck for
4089 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4090 process, before it forks any delivery processes. The open lookup caching
4091 mechanism meant that the open file or database connection was passed into
4092 the delivery process. The problem was that delivery processes always tidy
4093 up cached lookup data. This could cause a problem for the next delivery
4094 process started by the queue runner, because the external queue runner
4095 process does not know about the closure. So the next delivery process
4096 still has data in the lookup cache. In the case of a file lookup, there was
4097 no problem because closing a file descriptor in a subprocess doesn't affect
4098 the parent. However, if the lookup was caching a connection to a database,
4099 the connection was closed, and the second delivery process was likely to
4100 see errors such as "PGSQL: query failed: server closed the connection
4101 unexpectedly". The problem has been fixed by closing all cached lookups
4102 in a queue runner before running a delivery process.
4104 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4105 seem to have the "const" qualifier which it has on other OS. I've
4108 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4109 *of the same type* (client or server) with the same public name that an
4110 error should be diagnosed.
4112 9. When Exim looked up a host name for an IP address, but failed to find the
4113 original IP address when looking up the host name (a safety check), it
4114 output the message "<ip address> does not match any IP for NULL", which was
4115 confusing, to say the least. The bug was that the host name should have
4116 appeared instead of "NULL".
4118 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4119 user that is built into the binary, and the -C or -D options is used, root
4120 privilege is dropped before the configuration file is read. In addition,
4121 logging is switched to stderr instead of the normal log files. If the
4122 configuration then re-defines the Exim user, the unprivileged environment
4123 is probably not what is expected, so Exim logs a panic warning message (but
4126 However, if deliver_drop_privilege is set, the unprivileged state may well
4127 be exactly what is intended, so the warning has been cut out in that case,
4128 and Exim is allowed to try to write to its normal log files.
4134 1. smtp_return_error_details was not giving details for temporary sender
4135 or receiver verification errors.
4137 2. Diagnose a configuration error if two authenticators have the same public
4140 3. Exim used not to create the message log file for a message until the first
4141 delivery attempt. This could be confusing when incoming messages were held
4142 for policy or load reasons. The message log file is now created at the time
4143 the message is received, and an initial "Received" line is written to it.
4145 4. The automatically generated man page for command line options had a minor
4146 bug that caused no ill effects; however, a more serious problem was that
4147 the procedure for building the man page automatically didn't always
4148 operate. Consequently, release 4.20 contains an out-of-date version. This
4149 shouldn't happen again.
4151 5. When building Exim with embedded Perl support, the script that builds the
4152 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4153 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4155 6. The freeze_tell option was not being used for messages that were frozen on
4156 arrival, either by an ACL or by local_scan().
4158 7. Added the smtp_incomplete_transaction log selector.
4160 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4161 was accepting AUTH without a new EHLO.
4163 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4164 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4167 10. Logging of TCP/IP connections (when configured) now happens in the main
4168 daemon process instead of the child process, so that the TCP/IP connection
4169 count is more accurate (but it can never be perfect).
4171 11. The use of "drop" in a nested ACL was not being handled correctly in the
4172 outer ACL. Now, if condition failure induced by the nested "drop" causes
4173 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4174 or "require"), the connection is dropped.
4176 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4177 that yield "discard" can now be used with an "accept" or a "discard" verb,
4178 but an error is generated for any others (because I can't see a useful way
4179 to define what should happen).
4181 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4182 are now processed in the same way as lines in the Exim configuration file.
4183 In particular, continuation lines are supported.
4185 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4187 15. Added -ti meaning -t -i.
4189 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4190 domains, and warn by logging if others are found.
4192 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4193 returned from GIFCONF when Exim is trying to find the list of interfaces on
4194 a host. The code in os.c has been modified to copy each ifreq to an aligned
4195 structure in all cases.
4197 Also, in some cases, the returned ifreq's were being copied to a 'struct
4198 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4199 means the last couple of bytes of an IPv6 address could be chopped if the
4200 ifreq contained only a normal sockaddr (14 bytes storage).
4202 18. Named domain lists were not supported in the hosts_treat_as_local option.
4203 An entry such as +xxxx was not recognized, and was treated as a literal
4206 19. Ensure that header lines added by a DATA ACL are included in the reject log
4207 if the ACL subsequently rejects the message.
4209 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4210 MD5 (which is deprecated).
4212 21. When testing a filter file using -bf, Exim was writing a message when it
4213 took the sender from a "From " line in the message, but it was not doing so
4214 when it took $return_path from a Return-Path: header line. It now does.
4216 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4217 with a valid header line field name (a series of printing characters
4218 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4220 23. Changed "disc" in the source to "disk" to conform to the documentation and
4221 the book and for uniformity.
4223 24. Ignore Sendmail's -Ooption=value command line item.
4225 25. When execve() failed while trying to run a command in a pipe transport,
4226 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4227 could be confused with a return value of 69 from the command itself. This
4228 has been changed to 127, the value the shell returns if it is asked to run
4229 a non-existent command. The wording for the related log line suggests a
4230 non-existent command as the problem.
4232 26. If received_header_text expands to an empty string, do not add a Received:
4233 header line to the message. (Well, it adds a token one on the spool, but
4234 marks it "old" so that it doesn't get used or transmitted.)
4236 27. Installed eximstats 1.28 (addition of -nt option).
4238 28. There was no check for failure on the call to getsockname() in the daemon
4239 code. This can fail if there is a shortage of resources on the system, with
4240 ENOMEM, for example. A temporary error is now given on failure.
4242 29. Contrary to the C standard, it seems that in some environments, the
4243 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4244 program. Exim now does this explicitly; it affects the formatting of
4245 timestamps using strftime().
4247 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4248 complaints. I've now initialized all the variables, to avoid this.
4250 32. Header lines added by a system filter were not being "seen" during
4251 transport-time rewrites.
4253 33. The info_callback() function passed to OpenSSL is set up with type void
4254 (*)(SSL *, int, int), as described somewhere. However, when calling the
4255 function (actually a macro) that sets it up, the type void(*)() is
4256 expected. I've put in a cast to prevent warnings from picky compilers.
4258 34. If a DNS black list lookup found a CNAME record, but there were no A
4259 records associated with the domain it pointed at, Exim crashed.
4261 35. If a DNS black list lookup returned more than one A record, Exim ignored
4262 all but the first. It now scans all returned addresses if a particular IP
4263 value is being sought. In this situation, the contents of the
4264 $dnslist_value variable are a list of all the addresses, separated by a
4267 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4268 to accept a host name and all its aliases if the forward lookup for any of
4269 them yielded the IP address of the incoming connection. Now it accepts only
4270 those names whose forward lookup yields the correct IP address. Any other
4271 names are discarded. This closes a loophole whereby a rogue DNS
4272 administrator could create reverse DNS records to break through a
4273 wildcarded host restriction in an ACL.
4275 37. If a user filter or a system filter that ran in a subprocess used any of
4276 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4277 the wrong values were passed to the pipe command ($thisaddress had the
4278 value of $0, $0 had the value of $1, etc). This bug was introduced by
4279 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4281 38. Improved the line breaking for long SMTP error messages from ACLs.
4282 Previously, if there was no break point between 40 and 75 characters, Exim
4283 left the rest of the message alone. Two changes have been made: (a) I've
4284 reduced the minimum length to 35 characters; (b) if it can't find a break
4285 point between 35 and 75 characters, it looks ahead and uses the first one
4286 that it finds. This may give the occasional overlong line, but at least the
4287 remaining text gets split now.
4289 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4290 file descriptors might be low, and that setting 1000 would always raise it.
4291 It turns out that in some environments, the limit is already over 1000 and
4292 that lowering it causes trouble. So now Exim takes care not to decrease it.
4294 40. When delivering a message, the value of $return_path is set to $sender_
4295 address at the start of routing (routers may change the value). By an
4296 oversight, this default was not being set up when an address was tested by
4297 -bt or -bv, which affected the outcome if any router or filter referred to
4300 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4301 log only when "message" or "log_message" are set. However, if one of the
4302 conditions was an address verification, or a call to a nested ACL, the
4303 messages generated by the underlying test were being passed through. This
4304 no longer happens. The underlying message is available in $acl_verify_
4305 message for both "message" and "log_message" expansions, so it can be
4306 passed through if needed.
4308 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4309 new expansion $bh_ to give the encoded byte string without charset
4310 translation. Translation happens only if iconv() is available; HAVE_ICONV
4311 indicates this at build time. HEADERS_CHARSET gives the charset to
4312 translate to; headers_charset can change it in the configuration, and
4313 "headers charset" can change it in an individual filter file.
4315 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4316 that creates RFC 2047 encoded "words" labels them as that charset instead
4317 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4318 expansion operator; (ii) when Exim creates a From: line for a local
4319 message; (iii) when a header line is rewritten to include a "phrase" part.
4321 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4322 buggy, causing it to skip the first lines of messages whose message ID
4323 ended in 'D'. This would not have bitten before Exim release 4.14, because
4324 message IDs were unlikely to end in 'D' before then. The effect was to have
4325 incorrect size information for certain domains.
4327 45. #include "config.h" was missing at the start of the crypt16.c module. This
4328 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4331 46. If there was a timeout during a "random" callout check, Exim treated it as
4332 a failure of the random address, and carried on sending RSET and the real
4333 address. If the delay was just some slowness somewhere, the response to the
4334 original RCPT would be taken as a response to RSET and so on, causing
4335 mayhem of various kinds.
4337 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4338 when I implemented it. It didn't allow for the fact that some option values
4339 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4340 the right test for positive values.
4342 48. Domain names in DNS records are case-independent. Exim always looks them up
4343 in lower case. Some resolvers return domain names in exactly the case they
4344 appear in the zone file, that is, they may contain uppercase letters. Not
4345 all resolvers do this - some return always lower case. Exim was treating a
4346 change of case by a resolver as a change of domain, similar to a widening
4347 of a domain abbreviation. This triggered its re-routing code and so it was
4348 trying to route what was effectively the same domain again. This normally
4349 caused routing to fail (because the router wouldn't handle the domain
4350 twice). Now Exim checks for this case specially, and just changes the
4351 casing of the domain that it ultimately uses when it transmits the message
4354 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4357 50. If a filter generated a file delivery with a non-absolute name (possible if
4358 no home directory exists for the router), the forbid_file option was not
4361 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4362 the existing equality matching.
4364 52. Exim was using ints instead of ino_t variables in some places where it was
4365 dealing with inode numbers.
4367 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4368 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4369 called TMPDIR, and if it finds it is different, it changes its value.
4371 54. The smtp_printf() function is now made available to local_scan() so
4372 additional output lines can be written before returning. There is also an
4373 smtp_fflush() function to enable the detection of a dropped connection.
4374 The variables smtp_input and smtp_batched_input are exported to
4377 55. Changed the default runtime configuration: the message "Unknown user"
4378 has been removed from the ACL, and instead placed on the localuser router,
4379 using the cannot_route_message feature. This means that any verification
4380 failures that generate their own messages won't get overridden. Similarly,
4381 the "Unrouteable address" message that was in the ACL for unverifiable
4382 relay addresses has also been removed.
4384 56. Added hosts_avoid_esmtp to the smtp transport.
4386 57. The exicyclog script was not checking for the esoteric option
4387 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4388 will work only if exicyclog is run under the appropriate euid.
4390 58. Following a discussion on the list, the rules by which Exim recognises line
4391 endings on incoming messages have been changed. The -dropcr and drop_cr
4392 options are now no-ops, retained only for backwards compatibility. The
4393 following line terminators are recognized: LF CRLF CR. However, special
4394 processing applies to CR:
4396 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4397 nor a local message in the state where . is a terminator.
4399 (ii) If a bare CR is encountered in a header line, an extra space is added
4400 after the line terminator so as not to end the header. The reasoning
4401 behind this is that bare CRs in header lines are most likely either
4402 to be mistakes, or people trying to play silly games.
4404 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4405 was being incorrectly given as 18 bytes larger than it should have been.
4406 This is a VOB (very old bug).
4408 60. This may never have affected anything current, but just in case it has:
4409 When the local host is found other than at the start of a list of hosts,
4410 the local host, those with the same MX, and any that follow, are discarded.
4411 When the list in question was part of a longer list of hosts, the following
4412 hosts (not currently being processed) were also being discarded. This no
4413 longer happens. I'm not sure if this situation could ever has previously
4416 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4419 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4420 header. This is something that is recommended in a new Internet Draft, and
4421 is something that is documented as being done by Sendmail. There are two
4422 possible values. For messages generated by the autoreply transport, Exim
4425 Auto-Submitted: auto-replied
4427 whereas for all other generated messages (e.g. bounces) it adds
4429 Auto-Submitted: auto-generated
4431 63. The "personal" condition in filters now includes a test for the
4432 Auto-Submitted: header. If it contains the string "auto-" the message it
4433 not considered personal.
4435 64. Added rcpt_include_affixes as a generic transport option.
4437 65. Added queue_only_override (default true).
4439 66. Added the syslog_duplication option.
4441 67. If what should have been the first header line of a message consisted of
4442 a space followed by a colon, Exim was mis-interpreting it as a header line.
4443 It isn't of course - it is syntactically invalid and should therefore be
4444 treated as the start of the message body. The misbehaviour could have
4445 caused a number of strange effects, including loss of data in subsequent
4446 header lines, and spool format errors.
4448 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4449 client host had authenticated. This control can now be exercised by an ACL
4450 for more flexibility.
4452 69. By default, callouts do not happen when testing with -bh. There is now a
4453 variant, -bhc, which does actually run the callout code, including
4454 consulting and updating the callout cache.
4456 70. Added support for saslauthd authentication, courtesy of Alexander
4459 71. If statvfs() failed on the spool or log directories while checking their
4460 size for availability, Exim confusingly gave the error "space shortage".
4461 Furthermore, in debugging mode it crashed with a floating point exception.
4462 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4463 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4464 serious problem, Exim now writes to the main and panic logs when this
4465 happens, with details of the failure. It then refuses to accept the
4466 incoming message, giving the message "spool directory problem" or "log
4467 directory problem" with a 421 code for SMTP messages.
4469 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4470 0, 1, and 2 exist, because some OS complain for execs without them (see
4471 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4472 descriptors. However, the code omitted to check that the open succeeded,
4473 causing mysterious errors if for some reason the permissions on /dev/null
4474 got screwed. Now Exim writes a message to the main and panic logs, and
4475 bombs out if it can't open /dev/null.
4477 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4478 interact so that it is all more flexible. It is supposed to remain
4479 backwards compatible. Also added extra_local_interfaces.
4481 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4482 to bomb out with an assertion failure - to the client this appears as a
4483 connection drop. This problem occurs in the part of the code that was taken
4484 from the Samba project. Fortunately, the assertion is in a very simple
4485 function, so I have fixed this by reproducing the function inline in the
4486 one place where it is called, and arranging for authentication to fail
4487 instead of killing the process with assert().
4489 75. The SPA client code was not working when the server requested OEM rather
4490 than Unicode encoding.
4492 76. Added code to make require_files with a specific uid setting more usable in
4493 the case where statting the file as root fails - usually a non-root-mounted
4494 NFS file system. When this happens and the failure is EACCES, Exim now
4495 forks a subprocess and does the per-uid checking as the relevant uid.
4497 77. Added process_log_path.
4499 78. If log_file_path was not explicitly set, a setting of check_log_space or
4500 check_log_inodes was ignored.
4502 79. If a space check for the spool or log partitions fails, the incident is now
4503 logged. Of course, in the latter case the data may get lost...
4505 80. Added the %p formatting code to string_format() so that it can be used to
4506 print addresses in debug_print(). Adjusted all the address printing in the
4507 debugging in store.c to use %p rather than %d.
4509 81. There was a concern that a line of code in smtp_in.c could overflow a
4510 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4511 initially expressed, the concern was not well-founded, because trailing
4512 spaces are removed early. However, if the trailing spaces were followed by
4513 a NULL, they did not get removed, so the overflow was possible. Two fixes
4516 (a) I re-wrote the offending code in a cleaner fashion.
4517 (b) If an incoming SMTP command contains a NULL character, it is rejected
4520 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4521 runs initgroups(), so that if the Exim user is in any additional groups,
4522 they will be used during message reception.
4528 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob