1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.472 2007/02/06 14:19:00 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
10 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
13 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
16 PH/02 In an ACL statement such as
18 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
20 if a client was not listed at all, or was listed with a value other than
21 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
22 the condition was not true (as it should be), so access was not denied.
23 The bug was that the ! inversion was incorrectly passed on to the second
24 item. This has been fixed.
26 PH/03 Added additional dnslists conditions == and =& which are different from
27 = and & when the dns lookup returns more than one IP address.
29 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
30 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
32 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
33 FSYNC, which compiles an option called disable_fsync that allows for
34 bypassing fsync(). The documentation is heavily laced with warnings.
36 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
38 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
39 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
40 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
41 including adding "make clean"; (3) Added -fPIC when compiling the test
42 dynamically loaded module, to get rid of a warning.
44 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
45 message fails, move_frozen_messages = true and ignore_bounce_errors_after
46 = 0s. The bug is otherwise harmless.
48 PH/07 There was a bug in the dovecot authenticator such that the value of
49 $auth1 could be overwritten, and so not correctly preserved, after a
50 successful authentication. This usually meant that the value preserved by
51 the server_setid option was incorrect.
53 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
55 PH/09 Installed PCRE release 7.0.
57 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
58 run for batched SMTP input. It is now run at the start of every message
59 in the batch. While fixing this I discovered that the process information
60 (output by running exiwhat) was not always getting set for -bs and -bS
61 input. This is fixed, and it now also says "batched" for BSMTP.
63 PH/11 Added control=no_pipelining.
65 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
66 patch, slightly modified), and move the expansion of helo_data till after
67 the connection is made in the smtp transport (so it can use these
70 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
72 PH/14 Added log_selector = +pid.
74 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
76 PH/16 Add ${if forany and ${if forall.
78 PH/17 Added dsn_from option to vary the From: line in DSNs.
80 PH/18 Flush SMTP output before performing a callout, unless control =
81 no_callout_flush is set.
83 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
84 was true (the default) a successful delivery failed to delete the retry
85 item, thus causing premature timeout of the address. The bug is now
92 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
93 fixed by 4.65/MH/01 (is this a record?) are fixed:
95 (i) An empty string was always treated as zero by the numeric comparison
96 operators. This behaviour has been restored.
98 (ii) It is documented that the numeric comparison operators always treat
99 their arguments as decimal numbers. This was broken in that numbers
100 starting with 0 were being interpreted as octal.
102 While fixing these problems I realized that there was another issue that
103 hadn't been noticed. Values of message_size_limit (both the global option
104 and the transport option) were treated as octal if they started with 0.
105 The documentation was vague. These values are now always treated as
106 decimal, and I will make that clear in the documentation.
112 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
113 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
116 MH/01 Don't check that the operands of numeric comparison operators are
117 integers when their expansion is in "skipping" mode (fixes bug
118 introduced by 4.64-PH/07).
120 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
121 child addresses, Exim now panics and dies. Previously, because the count
122 is held in a short int, deliveries were likely to be lost. As such a
123 large number of recipients for a single message is ridiculous
124 (performance will be very, very poor), I have chosen to impose a limit
125 rather than extend the field.
131 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
132 leftover -K file (the existence of which was triggered by #402).
133 While we were at it, introduced process PID as part of the -K
134 filename. This should rule out race conditions when creating
137 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
138 processing considerably. Previous code took too long for large mails,
139 triggering a timeout which in turn triggers #401.
141 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
142 in the DK code in transports.c. sendfile() is not really portable,
143 hence the _LINUX specificness.
145 TF/01 In the add_headers option to the mail command in an Exim filter,
146 there was a bug that Exim would claim a syntax error in any
147 header after the first one which had an odd number of characters
150 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
151 callout verification, Exim cached a "reject" for the entire domain. This
152 is correct for most verifications, but it is not correct for a recipient
153 verification with use_sender or use_postmaster set, because in that case
154 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
155 case of MAIL FROM:<> rejection from other early rejections (e.g.
156 rejection of HELO). When verifying a recipient using a non-null MAIL
157 address, the cache is ignored if it shows MAIL FROM:<> rejection.
158 Whatever the result of the callout, the value of the domain cache is
159 left unchanged (for any other kind of callout, getting as far as trying
160 RCPT means that the domain itself is ok).
162 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
165 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
166 manifest itself as EPIPE rather than ECONNECT. When tidying away a
167 session, the daemon ignores ECONNECT errors and logs others; it now
168 ignores EPIPE as well.
170 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
171 (quoted-printable decoding).
173 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
174 later the small subsequent patch to fix an introduced bug.
176 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
178 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
180 PH/08 An error is now given if message_size_limit is specified negative.
182 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
183 to be given (somewhat) arbitrary names.
185 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
188 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
189 miscellaneous code fixes
191 PH/10 Added the log_reject_target ACL modifier to specify where to log
194 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
195 hostname. This is wrong, because it relates to the incoming message (and
196 probably the interface on which it is arriving) and not to the outgoing
197 callout (which could be using a different interface). This has been
198 changed to use the value of the helo_data option from the smtp transport
199 instead - this is what is used when a message is actually being sent. If
200 there is no remote transport (possible with a router that sets up host
201 addresses), $smtp_active_hostname is used.
203 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
204 tweaks were necessary in order to get it to work (see also 21 below):
205 (a) The code assumed that strncpy() returns a negative number on buffer
206 overflow, which isn't the case. Replaced with Exim's string_format()
208 (b) There were several signed/unsigned issues. I just did the minimum
209 hacking in of casts. There is scope for a larger refactoring.
210 (c) The code used strcasecmp() which is not a standard C function.
211 Replaced with Exim's strcmpic() function.
212 (d) The code set only $1; it now sets $auth1 as well.
213 (e) A simple test gave the error "authentication client didn't specify
214 service in request". It would seem that Dovecot has changed its
215 interface. Fortunately there's a specification; I followed it and
216 changed what the client sends and it appears to be working now.
218 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
221 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
222 address A is aliased to B and C, where B exists and C does not. Without
223 -v the output is "A verified" because verification stops after a
224 successful redirection if more than one address is generated. However,
225 with -v the child addresses are also verified. Exim was outputting "A
226 failed to verify" and then showing the successful verification for C,
227 with its parentage. It now outputs "B failed to verify", showing B's
228 parentage before showing the successful verification of C.
230 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
231 look up a TXT record in a specific list after matching in a combined
234 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
235 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
236 they consult the DNS. I had assumed they would set it the way they
237 wanted; and indeed my experiments on Linux seem to show that in some
238 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
239 To be on the safe side, however, I have now made the interface to
240 host_find_byname() similar to host_find_bydns(), with an argument
241 containing the DNS resolver options. The host_find_byname() function now
242 sets these options at its start, just as host_find_bydns() does. The smtp
243 transport options dns_qualify_single and dns_search_parents are passed to
244 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
245 of host_find_byname() use the default settings of RES_DEFNAMES
246 (qualify_single) but not RES_DNSRCH (search_parents).
248 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
249 spool_read_header() do less string testing, by means of a preliminary
250 switch on the second character of optional "-foo" lines. (This is
251 overdue, caused by the large number of possibilities that now exist.
252 Originally there were few.) While I was there, I also converted the
253 str(n)cmp tests so they don't re-test the leading "-" and the first
254 character, in the hope this might squeeze out yet more improvement.
256 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
257 flag allowing group syntax was set by the header_syntax check but not
258 turned off, possible causing trouble later; (2) The flag was not being
259 set at all for the header_verify test, causing "group"-style headers to
260 be rejected. I have now set it in this case, and also caused header_
261 verify to ignore an empty address taken from a group. While doing this, I
262 came across some other cases where the code for allowing group syntax
263 while scanning a header line wasn't quite right (mostly, not resetting
264 the flag correctly in the right place). These bugs could have caused
265 trouble for malformed header lines. I hope it is now all correct.
267 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
268 with the "reply" argument non-NULL. The code, however (which originally
269 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
270 but it didn't always do it. This confused somebody who was copying the
271 code for some other use. I have removed all the tests.
273 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
274 feature that was used to support insecure browsers during the U.S. crypto
275 embargo. It requires special client support, and Exim is probably the
276 only MTA that supported it -- and would never use it because real RSA is
277 always available. This code has been removed, because it had the bad
278 effect of slowing Exim down by computing (never used) parameters for the
279 RSA_EXPORT functionality.
281 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
282 authenticator to fail if there's a tab character in the incoming data
283 (there should never be unless someone is messing about, as it's supposed
284 to be base64-encoded). Also added, on Timo's advice, the "secured" option
285 if the connection is using TLS or if the remote IP is the same as the
286 local IP, and the "valid-client-cert option" if a client certificate has
289 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
290 authenticators. This can be used for authorization after authentication
291 succeeds. (In the case of plaintext, it servers for both authentication
294 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
295 if any retry times were supplied.
297 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
298 connection, where there is no client IP address to check. In this
299 situation, the verify now always succeeds.
301 PH/25 Applied John Jetmore's -Mset patch.
303 PH/26 Added -bem to be like -Mset, but loading a message from a file.
305 PH/27 In a string expansion for a processed (not raw) header when multiple
306 headers of the same name were present, leading whitespace was being
307 removed from all of them, but trailing whitespace was being removed only
308 from the last one. Now trailing whitespace is removed from each header
309 before concatenation. Completely empty headers in a concatenation (as
312 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
313 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
315 PH/29 [Removed. This was a change that I later backed out, and forgot to
316 correct the ChangeLog entry (that I had efficiently created) before
317 committing the later change.]
319 PH/30 Exim was sometimes attempting to deliver messages that had suffered
320 address errors (4xx response to RCPT) over the same connection as other
321 messages routed to the same hosts. Such deliveries are always "forced",
322 so retry times are not inspected. This resulted in far too many retries
323 for the affected addresses. The effect occurred only when there were more
324 hosts than the hosts_max_try setting in the smtp transport when it had
325 the 4xx errors. Those hosts that it had tried were not added to the list
326 of hosts for which the message was waiting, so if all were tried, there
327 was no problem. Two fixes have been applied:
329 (i) If there are any address or message errors in an SMTP delivery, none
330 of the hosts (tried or untried) are now added to the list of hosts
331 for which the message is waiting, so the message should not be a
332 candidate for sending over the same connection that was used for a
333 successful delivery of some other message. This seems entirely
334 reasonable: after all the message is NOT "waiting for some host".
335 This is so "obvious" that I'm not sure why it wasn't done
336 previously. Hope I haven't missed anything, but it can't do any
337 harm, as the worst effect is to miss an optimization.
339 (ii) If, despite (i), such a delivery is accidentally attempted, the
340 routing retry time is respected, so at least it doesn't keep
341 hammering the server.
343 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
344 in ${readsocket because some servers need this prod.
346 PH/32 Added some extra debug output when updating a wait-xxx database.
348 PH/33 The hint "could be header name not terminated by colon", which has been
349 given for certain expansion errors for a long time, was not being given
350 for the ${if def:h_colon_omitted{... case.
352 PH/34 The spec says: "With one important exception, whenever a domain list is
353 being scanned, $domain contains the subject domain." There was at least
354 one case where this was not true.
356 PH/35 The error "getsockname() failed: connection reset by peer" was being
357 written to the panic log as well as the main log, but it isn't really
358 panic-worthy as it just means the connection died rather early on. I have
359 removed the panic log writing for the ECONNRESET error when getsockname()
362 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
363 runs only) independently of the message's sender address. This meant
364 that, if the 4xx error was in fact related to the sender, a different
365 message to the same recipient with a different sender could confuse
366 things. In particualar, this can happen when sending to a greylisting
367 server, but other circumstances could also provoke similar problems.
368 I have changed the default so that the retry time for these errors is now
369 based a combination of the sender and recipient addresses. This change
370 can be overridden by setting address_retry_include_sender=false in the
373 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
374 remote server are returned as part of bounce messages. This was not
375 happening for LMTP over a pipe (the lmtp transport), but now it is the
376 same for both kinds of LMTP.
378 PH/38 Despite being documented as not happening, Exim was rewriting addresses
379 in header lines that were in fact CNAMEs. This is no longer the case.
381 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
382 and queue runs started by the daemon processed all messages. This has
383 been fixed so that -R and -S can now usefully be given with -q<time>.
385 PH/40 Import PCRE release 6.7 (fixes some bugs).
387 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
389 PH/42 Give an error if -q is specified more than once.
391 PH/43 Renamed the variables $interface_address and $interface_port as
392 $received_ip_address and $received_port, to make it clear that these
393 values apply to message reception, and not to the outgoing interface when
394 a message is delivered. (The old names remain recognized, of course.)
396 PH/44 There was no timeout on the connect() call when using a Unix domain
397 socket in the ${readsocket expansion. There now is.
399 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
400 be meaningful with "accept".
402 SC/01 Eximstats V1.43
403 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
405 SC/02 Eximstats V1.44
406 Use a glob alias rather than an array ref in the generated
407 parser. This improves both readability and performance.
409 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
410 Collect SpamAssassin and rejection statistics.
411 Don't display local sender or destination tables unless
412 there is data to show.
413 Added average volumes into the top table text output.
415 SC/04 Eximstats V1.46
416 Collect data on the number of addresses (recipients)
417 as well as the number of messages.
419 SC/05 Eximstats V1.47
420 Added 'Message too big' to the list of mail rejection
421 reasons (thanks to Marco Gaiarin).
423 SC/06 Eximstats V1.48
424 Mainlog lines which have GMT offsets and are too short to
425 have a flag are now skipped.
427 SC/07 Eximstats V1.49 (Alain Williams)
428 Added the -emptyok flag.
430 SC/08 Eximstats V1.50
431 Fixes for obtaining the IP address from reject messages.
433 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
434 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
435 whitesspace changes from 4.64-PH/27
437 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
440 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
441 are found, allow negative numbers in numeric criteria)
443 JJ/06 exipick.20061117.2, added new $message_body_missing variable
445 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
446 to match changes made in 4.64-PH/43
448 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
450 PH/47 Put in an explicit test for a DNS lookup of an address record where the
451 "domain" is actually an IP address, and force a failure. This locks out
452 those revolvers/nameservers that support "A-for-A" lookups, in
453 contravention of the specifications.
455 PH/48 When a host name was looked up from an IP address, and the subsequent
456 forward lookup of the name timed out, the host name was left in
457 $sender_host_name, contrary to the specification.
459 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
460 restricted to single-key lookups, Exim was not diagnosing an error if
461 * or *@ was used with a query-style lookup.
463 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
465 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
466 long ago, but noone interested enough thought of it. Let's just say that
467 the "1.1" means that there are some new functions that weren't there at
468 some point in the past.
470 PH/51 Error processing for expansion failure of helo_data from an smtp
471 transport during callout processing was broken.
473 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
474 tested/used via the -bh/-bhc/-bs options.
476 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
477 bug, fixed in subsequent PCRE releases).
479 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
480 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
482 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
488 SC/01 Use a glob alias rather than an array ref in eximstats generated
489 parser. This improves both readability and performance.
491 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
492 Don't display local sender or destination tables in eximstats unless
493 there is data to show.
494 Added average volumes into the eximstats top table text output.
496 SC/03 Collect data on the number of addresses (recipients) as well
497 as the number of messages in eximstats.
499 TF/01 Correct an error in the documentation for the redirect router. Exim
500 does (usually) call initgroups() when daemonizing.
502 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
503 with consistent privilege compared to when running as a daemon.
505 TF/03 Note in the spec that $authenticated_id is not set for local
506 submissions from trusted users.
508 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
509 Thanks to Dean Brooks <dean@iglou.com> for the patch.
511 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
512 by adding some example configuration directives to the default
513 configuration file. A little bit of work is required to uncomment the
514 directives and define how usernames and passwords are checked, but
515 there is now a framework to start from.
517 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
518 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
519 without this. I don't know how relevant this is to other LDAP libraries.
521 PH/02 Add the verb name to the "unknown ACL verb" error.
523 PH/03 Magnus Holmgren's patch for filter_prepend_home.
525 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
527 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
528 directory not expanded when it should be if an expanded home directory
529 was set for the address (which is overridden by the transport).
531 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
534 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
535 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
536 because it is too late at that time, and has no effect.
538 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
539 security issue with \' (bugzilla #107). I could not use the
540 PQescapeStringConn() function, because it needs a PGconn value as one of
543 PH/08 When testing addresses using -bt, indicate those final addresses that
544 are duplicates that would not cause an additional delivery. At least one
545 person was confused, thinking that -bt output corresponded to deliveries.
546 (Suppressing duplicates isn't a good idea as you lose the information
547 about possibly different redirections that led to the duplicates.)
549 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
550 systems where poll() doesn't work, in particular OS X.
552 PH/10 Added more information to debugging output for retry time not reached.
554 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
555 operations in malware.c.
557 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
560 PH/13 If write_rejectlog was set false when logging was sent to syslog with
561 syslog_duplication set false, log lines that would normally be written
562 both the the main log and to the reject log were not written to syslog at
565 PH/14 In the default configuration, change the use of "message" in ACL warn
566 statements to "add_header".
568 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
569 not followed by a command (e.g. "seen endif").
571 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
572 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
575 PH/17 Added extra conditions to the default value of delay_warning_condition
579 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
580 { match{$h_precedence:}{(?i)bulk|list|junk} } \
581 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
584 The Auto-Submitted: and various List- headers are standardised, whereas I
585 don't think Precedence: ever was.
587 PH/18 Refactored debugging code in route_finduser() to show more information,
588 in particular, the error code if getpwnam() issues one.
590 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
591 This is apparently needed in addition to the PH/07 change above to avoid
592 any possible encoding problems.
594 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
595 but not after initializing Perl.
597 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
598 output them only if debugging. By default they are written stderr,
599 apparently, which is not desirable.
601 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
604 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
607 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
609 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
610 authenticated or an ident call has been made. Suppress the default
611 values for $authenticated_id and $authenticated_sender (but permit -oMai
612 and -oMas) when testing with -bh.
614 PH/24 Re-jigged the order of the tests in the default configuration so that the
615 tests for valid domains and recipients precede the DNS black list and CSA
616 tests, on the grounds that those ones are more expensive.
618 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
619 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
620 This bug exists in every version of Exim that I still have, right back to
623 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
624 However, an attempt to turn on case-sensitivity in a regex key by
625 including (?-i) didn't work because the subject string was already
626 lowercased, and the effects were non-intuitive. It turns out that a
627 one-line patch can be used to allow (?-i) to work as expected.
633 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
634 other effects) broke the use of negated acl sub-conditions.
636 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
639 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
640 "Deny" causes Exim to reject the incoming connection with a 554 error.
641 Unfortunately, if there is a major crisis, such as a disk failure,
642 tcp-wrappers gives "deny", whereas what one would like would be some
643 kind of temporary error. A kludge has been added to help with this.
644 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
645 554 error is used if errno is still zero or contains ENOENT (which occurs
646 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
649 PH/03 Add -lutil to the default FreeBSD LIBS setting.
651 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
652 errors. Otherwise a message that provokes a temporary error (when other
653 messages do not) can cause a whole host to time out.
655 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
656 addresses were routed directly to files or pipes from a redirect router.
657 File deliveries just didn't batch; pipe deliveries might have suffered
660 PH/06 A failure to get a lock for a hints database would erroneously always say
661 "Failed to get write lock", even when it was really a read lock.
663 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
664 of 0600. This has been changed to use the value of the lockfile_mode
665 option (which defaults to 0600).
667 PH/08 Applied small patch from the Sieve maintainer.
669 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
670 folder from quota calculations, a direct delivery into this folder messed
671 up the contents of the maildirsize file. This was because the regex was
672 used only to exclude .Trash (or whatever) when the size of the mailbox
673 was calculated. There was no check that a delivery was happening into an
674 excluded directory. This bug has been fixed by ignoring all quota
675 processing for deliveries into excluded directories.
677 PH/10 Added the maildirfolder_create_regex option to appendfile.
683 PH/01 The code for finding all the local interface addresses on a FreeBSD
684 system running IPv6 was broken. This may well have applied to all BSD
685 systems, as well as to others that have similar system calls. The broken
686 code found IPv4 interfaces correctly, but gave incorrect values for the
687 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
688 that it would not match correctly against @[] and not recognize the IPv6
691 PH/02 The ipliteral router was not recognizing addresses of the form user@
692 [ipv6:....] because it didn't know about the "ipv6:" prefix.
694 PH/03 Added disable_ipv6.
696 PH/04 Changed $reply_address to use the raw form of the headers instead of the
697 decoded form, because it is most often used to construct To: headers
698 lines in autoreplies, and the decoded form may well be syntactically
699 invalid. However, $reply_address has leading white space removed, and all
700 newlines turned into spaces so that the autoreply transport does not
703 PH/05 If group was specified without a user on a router, and no group or user
704 was specified on a transport, the group from the router was ignored.
706 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
707 for visible compile-time settings that can be used to change these
708 numbers, for those that want even more. Backwards compatibility with old
709 spool files has been maintained. However, going back to a previous Exim
710 release will lost any variables that are in spool files.
712 PH/07 Two small changes when running in the test harness: increase delay when
713 passing a TCP/IP connection to a new process, in case the original
714 process has to generate a bounce, and remove special handling of
715 127.0.0.2 (sic), which is no longer necessary.
717 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
718 be the same on different OS.
720 PH/09 Moved a debug statement in filter processing to avoid a race problem when
723 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
724 whether --show-vars was specified or not
726 JJ/02 exipick: Added support for new ACL variable spool format introduced
729 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
730 syntactically invalid From: or Reply-to: line, and a filter used this to
731 generate an autoreply, and therefore failed to obtain an address for the
732 autoreply, Exim could try to deliver to a non-existent relative file
733 name, causing unrelated and misleading errors. What now happens is that
734 it logs this as a hard delivery error, but does not attempt to create a
737 PH/11 The exinext utility has a -C option for testing purposes, but although
738 the given file was scanned by exinext itself; it wasn't being passed on
739 when Exim was called.
741 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
742 an end-of-file indication when reading a command response.
744 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
745 compiled. In many other places in Exim, IPv6 addresses are always
746 recognized, so I have changed this. It also means that IPv4 domain
747 literals of the form [IPV4:n.n.n.n] are now always recognized.
749 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
750 used if the router is not running as root, for example, when verifying at
751 ACL time, or when using -bh. The debugging output from this situation was
752 non-existent - all you got was a failure to exec. I have made two
755 (a) Failures to set uid/gid, the current directory, or a process leader
756 in a subprocess such as that created by queryprogram now generate
757 suitable debugging ouput when -d is set.
759 (b) The queryprogram router detects when it is not running as root,
760 outputs suitable debugging information if -d is set, and then runs
761 the subprocess without attempting to change uid/gid.
763 PH/15 Minor change to Makefile for building test_host (undocumented testing
766 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
767 additional section of a DNS packet that returns MX or SRV records.
768 Instead, it always explicitly searches for A/AAAA records. This avoids
769 major problems that occur when a DNS server includes only records of one
770 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
771 fixed another bug: if SRV records were looked up and the corresponding
772 address records were *not* found in the additional section, the port
773 values from the SRV records were lost.
775 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
776 using the correct key (the original address) when searching the retry
777 rules in order to find which one to use for generating the retry hint.
779 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
780 adding the default one. Similarly, if it contains a Reply-To: header, the
781 errors_reply_to option, if set, is not used.
783 PH/19 When calculating a retry time, Exim used to measure the "time since
784 failure" by looking at the "first failed" field in the retry record. Now
785 it does not use this if it is later than than the arrival time of the
786 message. Instead it uses the arrival time. This makes for better
787 behaviour in cases where some deliveries succeed, thus re-setting the
788 "first failed" field. An example is a quota failure for a huge message
789 when small messages continue to be delivered. Without this change, the
790 "time since failure" will always be short, possible causing more frequent
791 delivery attempts for the huge message than are intended.
792 [Note: This change was subsequently modified - see PH/04 for 4.62.]
794 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
795 $1, $2, $3) because the numerical variables can be reset during some
796 expansion items (e.g. "match"), thereby losing the authentication data.
798 PH/21 Make -bV show the size of off_t variables so that the test suite can
799 decide whether to run tests for quotas > 2G.
801 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
802 mailbox_size, and mailbox_filecount in the appendfile transport. If a
803 filecount value is greater than 2G or if a quota value is greater than 2G
804 on a system where the size of off_t is not greater than 4, a panic error
807 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
808 never match. The debug and -bh output now contains an explicit error
809 message indicating a malformed IPv4 address or mask.
811 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
812 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
815 PH/25 Do not write to syslog when running in the test harness. The only
816 occasion when this arises is a failure to open the main or panic logs
817 (for which there is an explicit test).
819 PH/26 Added the /no_tell option to "control=freeze".
821 PH/27 If a host name lookup failed very early in a connection, for example, if
822 the IP address matched host_lookup and the reverse lookup yielded a name
823 that did not have a forward lookup, an error message of the form "no IP
824 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
825 could be logged. Now it outputs the IP address instead of "NULL".
827 PH/28 An enabling patch from MH: add new function child_open_exim2() which
828 allows the sender and the authenticated sender to be set when
829 submitting a message from within Exim. Since child_open_exim() is
830 documented for local_scan(), the new function should be too.
832 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
833 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
834 results in an empty string is now treated as unset.
836 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
838 PH/31 Added sender_verify_fail logging option.
840 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
841 needed by RFC 822 but not by RFC 2822 was commented out. I have now
842 tidied the source and removed it altogether.
844 PH/33 When a queue run was abandoned because the load average was too high, a
845 log line was always written; now it is written only if the queue_run log
846 selector is set. In addition, the log line for abandonment now contains
847 information about the queue run such as the pid. This is always present
848 in "start" and "stop" lines but was omitted from the "abandon" line.
850 PH/34 Omit spaces between a header name and the colon in the error message that
851 is given when verify = headers_syntax fails (if there are lots of them,
852 the message gets confusing).
854 PH/35 Change the default for dns_check_names_pattern to allow slashes within
855 names, as there are now some PTR records that contain slashes. This check
856 is only to protect against broken name servers that fall over on strange
857 characters, so the fact that it applies to all lookups doesn't matter.
859 PH/36 Now that the new test suite is complete, we can remove some of the
860 special code in Exim that was needed for the old test suite. For example,
861 sorting DNS records because real resolvers return them in an arbitrary
862 order. The new test suite's fake resolver always returns records in the
865 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
866 bounces) except when queue_only is set, to avoid logging races between
867 the different processes.
869 PH/38 Panic-die if .include specifies a non-absolute path.
871 PH/39 A tweak to the "H" retry rule from its user.
873 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
874 a label. They prevented compilation on older perls.
876 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
877 a warning to be raised on newish perls.
879 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
880 on queue. Changes to match documented behaviour of showing count of
881 messages matching specified criteria.
883 PH/40 Changed the default ident timeout from 30s to 5s.
885 PH/41 Added support for the use of login_cap features, on those BSD systems
886 that have them, for controlling the resources used by pipe deliveries.
888 PH/42 The content-scanning code uses fopen() to create files in which to put
889 message data. Previously it was not paying any attention to the mode of
890 the files. Exim runs with umask(0) because the rest of the code creates
891 files with open(), and sets the required mode explicitly. Thus, these
892 files were ending up world-writeable. This was not a big issue, because,
893 being within the spool directory, they were not world-accessible. I have
894 created a function called modefopen, which takes an additional mode
895 argument. It sets umask(777), creates the file, chmods it to the required
896 mode, then resets the umask. All the relevant calls to fopen() in the
897 content scanning code have been changed to use this function.
899 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
900 to 24 hours. This avoids potential overflow problems when processing G
901 and H retry rules. I suspect nobody ever tinkers with this value.
903 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
905 PH/45 When the plaintext authenticator is running as a client, the server's
906 challenges are checked to ensure they are valid base64 strings. By
907 default, the authentication attempt is cancelled if an invalid string is
908 received. Setting client_ignore_invalid_base64 true ignores these errors.
909 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
910 they are received. Thus, the responses can be made to depend on the
911 challenges. If an invalid string is ignored, an empty string is placed in
914 PH/46 Messages that are created by the autoreply transport now contains a
915 References: header, in accordance with RFCs 2822 and 3834.
917 PH/47 Added authenticated_sender_force to the smtp transport.
919 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
921 PH/49 Installed latest patch from the Sieve maintainer.
923 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
924 was also set, the appendfile transport was unnecessarily scanning a
925 directory of message files (e.g. for maildir delivery) to find the count
926 of files (along with the size), even though it did not need this
927 information. It now does the scan only if it needs to find either the
928 size of the count of files.
930 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
932 PH/52 Two bugs concerned with error handling when the smtp transport is
935 (i) Exim was not creating retry information for temporary errors given
936 for individual recipients after the DATA command when the smtp transport
937 was used in LMTP mode. This meant that they could be retried too
938 frequently, and not timed out correctly.
940 (ii) Exim was setting the flag that allows error details to be returned
941 for LMTP errors on RCPT commands, but not for LMTP errors for individual
942 recipients that were returned after the DATA command.
944 PH/53 This is related to PH/52, but is more general: for any failing address,
945 when detailed error information was permitted to be returned to the
946 sender, but the error was temporary, then after the final timeout, only
947 "retry timeout exceeded" was returned. Now it returns the full error as
948 well as "retry timeout exceeded".
950 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
951 do this, and (what is worse) MTAs that accept it.
953 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
954 will now be deprecated.
956 PH/56 New os.c-cygwin from the Cygwin maintainer.
958 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
959 formats (previously only available in exim formats via -bpr, -bpru,
960 and -bpra. Now also available in native and exiqgrep formats)
962 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
963 with very large, slow to parse queues
965 JJ/08 exipick: added ! as generic prefix to negate any criteria format
967 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
969 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
970 responses to authentication challenges, though it was showing the
971 challenges; (ii) I've removed the CR characters from the debug output for
974 PH/58 Allow for the insertion of a newline as well as a space when a string
975 is turned into more than one encoded-word during RFC 2047 encoding. The
976 Sieve code now uses this.
978 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
979 data_4xx, lost_connection, tls_required.
981 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
982 message was being sent as an SMTP response.
984 PH/61 Add -l and -k options to exicyclog.
986 PH/62 When verifying, if an address was redirected to one new address, so that
987 verification continued, and the new address failed or deferred after
988 having set something in $address_data, the value of $address_data was not
989 passed back to the ACL. This was different to the case when no
990 redirection occurred. The value is now passed back in both cases.
992 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
993 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
994 use login_cap.h, so on its own it isn't the distinguishing feature. The
995 new name refers directly to the setclassresources() function.
997 PH/65 Added configuration files for NetBSD3.
999 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1001 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1002 is preferred over IPv4.
1004 PH/68 The bounce_return_message and bounce_return_body options were not being
1005 honoured for bounces generated during the reception of non-SMTP messages.
1006 In particular, this applied to messages rejected by the ACL. This bug has
1007 been fixed. However, if bounce_return_message is true and bounce_return_
1008 body is false, the headers that are returned for a non-SMTP message
1009 include only those that have been read before the error was detected.
1010 (In the case of an ACL rejection, they have all been read.)
1012 PH/69 The HTML version of the specification is now built in a directory called
1013 spec_html instead of spec.html, because the latter looks like a path with
1014 a MIME-type, and this confuses some software.
1016 PH/70 Catch two compiler warnings in sieve.c.
1018 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1019 function verify_get_ident() calls ip_connect() to connect a socket, but
1020 if the "connect()" function timed out, ip_connect() used to close the
1021 socket. However, verify_get_ident() also closes the socket later, and in
1022 between Exim writes to the log, which may get opened at this point. When
1023 the socket was closed in ip_connect(), the log could get the same file
1024 descriptor number as the socket. This naturally causes chaos. The fix is
1025 not to close the socket in ip_connect(); the socket should be closed by
1026 the function that creates it. There was only one place in the code where
1027 this was missing, in the iplookup router, which I don't think anybody now
1028 uses, but I've fixed it anyway.
1030 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1031 well as to direct DNS lookups. Otherwise the handling of names in host
1032 lists is inconsistent and therefore confusing.
1038 PH/01 Two changes to the default runtime configuration:
1040 (1) Move the checks for relay_from_hosts and authenticated clients from
1041 after to before the (commented out) DNS black list checks.
1043 (2) Add control=submission to the relay_from_hosts and authenticated
1044 clients checks, on the grounds that messages accepted by these
1045 statements are most likely to be submissions.
1047 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1049 (1) Generate an error if the third argument for the ${prvs expansion is
1052 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1055 (3) Reset the variables that are obtained from the first argument of
1056 ${prvscheck and used in the second argument before leaving the code,
1057 because their memory is reclaimed, so using them afterwards may do
1060 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1061 one (it's much easier than Tom thought :-).
1063 (5) Because of (4), we can now allow for the use of $prvscheck_result
1064 inside the third argument.
1066 PH/03 For some reason, the default setting of PATH when running a command from
1067 a pipe transport was just "/usr/bin". I have changed it to
1070 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1071 anything to be listed in the output from -bV.
1073 PH/05 When a filter generated an autoreply, the entire To: header line was
1074 quoted in the delivery log line, like this:
1076 => >A.N.Other <ano@some.domain> <original@ddress> ...
1078 This has been changed so that it extracts the operative address. There
1079 may be more than one such address. If so, they are comma-separated, like
1082 => >ano@some.domain,ona@other.domain <original@ddress> ...
1084 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1085 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1086 not being looked up in the rDNS to get a host name, Exim was showing the
1087 IP address twice in Received: lines, even though the IP addresses were
1088 identical. For example:
1090 Received: from [1.2.3.4] (helo=[1.2.3.4])
1092 However, if the real host name was known, it was omitting the HELO data
1093 if it matched the actual IP address. This has been tidied up so that it
1094 doesn't show the same IP address twice.
1096 PH/07 When both +timestamp and +memory debugging was on, the value given by
1097 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1098 called by the debug printing, thereby overwriting the timestamp buffer.
1099 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1101 PH/08 When the original message was included in an autoreply transport, it
1102 always said "this is a copy of the message, including all the headers",
1103 even if body_only or headers_only was set. It now gives an appropriate
1106 PH/09 Applied a patch from the Sieve maintainer which:
1108 o fixes some comments
1109 o adds the (disabled) notify extension core
1110 o adds some debug output for the result of if/elsif tests
1111 o points to the current vacation draft in the documentation
1112 and documents the missing references header update
1116 o fixes a bug in processing the envelope test (when testing
1117 multiple envelope elements, the last element determinted the
1120 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1121 Electronic Mail") by including:
1123 Auto-submitted: auto-generated
1125 in the messages that it generates (bounce messages and others, such as
1126 warnings). In the case of bounce messages for non-SMTP mesages, there was
1127 also a typo: it was using "Auto_submitted" (underscore instead of
1128 hyphen). Since every message generated by Exim is necessarily in response
1129 to another message, thes have all been changed to:
1131 Auto-Submitted: auto-replied
1133 in accordance with these statements in the RFC:
1135 The auto-replied keyword:
1137 - SHOULD be used on messages sent in direct response to another
1138 message by an automatic process,
1140 - MUST NOT be used on manually-generated messages,
1142 - MAY be used on Delivery Status Notifications (DSNs) and Message
1143 Disposition Notifications (MDNs),
1145 - MUST NOT be used on messages generated by automatic or periodic
1146 processes, except for messages which are automatic responses to
1149 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1150 to the default Received: header definition.
1152 PH/12 Added log selector acl_warn_skipped (default on).
1154 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1155 variables because (a) they are in the wrong storage pool and (b) even if
1156 they were copied, it wouldn't work properly because of the caching.
1158 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1159 checking when decoding. Apparently there are clients that generate
1160 overlong encoded strings. Why am I not surprised?
1162 PH/15 If the first argument of "${if match_address" was not empty, but did not
1163 contain an "@" character, Exim crashed. Now it writes a panic log message
1164 and treats the condition as false.
1166 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1168 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1169 extension "envelope-auth". The code is finished and in agreement with
1170 other implementations, but there is no documentation so far and in fact,
1171 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1172 not changing the active code.
1174 Print executed "if" and "elsif" statements when debugging is used. This
1175 helps a great deal to understand what a filter does.
1177 Document more things not specified clearly in RFC3028. I had all this
1178 sorted out, when out of a sudden new issues came to my mind. Oops."
1180 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1183 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1184 canonical form (as documented). However, after a host name lookup from
1185 the IP address, check_host() was doing a simple string comparison with
1186 addresses acquired from the DNS when checking that the found name did
1187 have the original IP as one of its addresses. Since any found IPv6
1188 addresses are likely to be in abbreviated form, the comparison could
1189 fail. Luckily, there already exists a function for doing the comparison
1190 by converting both addresses to binary, so now that is used instead of
1191 the text comparison.
1193 PH/20 There was another similar case to PH/19, when a complete host name was
1194 given in a host list; looking up its IP address could give an abbreviated
1195 form, whereas the current host's name might or might not be abbreviated.
1196 The same fix has been applied.
1202 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1203 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1206 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1207 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1209 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1211 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1212 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1213 Also, for "Auto-Submitted", treat anything other than "no" as
1214 non-personal, in accordance with RFC 3834. (Previously it treated
1215 anything starting "auto-" as non-personal.)
1217 TF/01 The control=submission/name=... option had a problem with syntax
1218 errors if the name included a slash character. The /name= option
1219 now slurps the rest of the string, so it can include any characters
1220 but it must come last in the list of options (after /sender_retain
1223 PH/05 Some modifications to the interface to the fake nameserver for the new
1231 TK/01 Added the "success_on_redirect" address verification option. See
1232 NewStuff for rationale and an example.
1234 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1236 PH/02 Patch to exigrep to allow it to work on syslog lines.
1238 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1239 fread() to skip over the body file's header line, because in Cygwin the
1240 header line is locked and is inaccessible.
1242 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1243 co-exist for some time) to make it clear that it is the Exim ID that is
1244 referenced, not the Message-ID: header line.
1246 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1247 string_format() function, because snprintf() does not exist on all
1250 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1251 ${stat: expansion item.
1253 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1254 protocol synchronization error", to keep the pedants happy.
1256 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1257 well as for IRIX systems, when gcc is being used. See the host.c source
1260 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1262 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1265 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1266 transport and to the smtp transport in LMTP mode.
1268 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1270 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1271 run a filter in a subprocess. This could lead to confusion in subsequent
1272 lookups in the parent process. There should also be a search_tidyup() at
1273 the end of the subprocess.
1275 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1276 only if the host matched helo_try_verify_hosts, which caused the
1277 verification to occur when the EHLO/HELO command was issued. The ACL just
1278 tested the remembered result. Now, if a previous verification attempt has
1279 not happened, "verify = helo" does it there and then.
1281 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1283 TK/03 Fix log output including CR from clamd.
1285 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1286 exist provoked a memory error which could cause a segfault.
1288 PH/15 Installed PCRE 6.2
1290 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1292 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1293 of the problem. Specifically, suggested +O2 rather than +O1 for the
1296 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1298 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1299 record, the port was not correctly logged when the outgoing_port log
1300 selector was set (it logged the transort's default port).
1302 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1303 fallback_hosts, and "hosts" in the smtp transport.
1305 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1306 host errors such as "Connection refused".
1308 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1309 authentication with radiusclient 0.4.9:
1311 - Error returned from rc_read_config was caught wrongly
1312 - Username/password not passed on to radius server due to wrong length.
1314 The presumption is that some radiusclient API changes for 4.51/PH/17
1315 were not taken care of correctly. The code is still untested by me (my
1316 Linux distribution still has 0.3.2 of radiusclient), but it was
1317 contributed by a Radius user.
1319 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1320 expanding the "port" option of the smtp transport.
1322 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1323 while reading a MIME header. Thanks to Tom Hughes for a patch.
1325 PH/24 Include config.h inside local_scan.h so that configuration settings are
1328 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1329 that in an ACL for RCPT (for example), you can examine exactly what was
1332 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1333 commands, but it was not correctly comparing the address with the actual
1334 client host address. Thus, it would show the EHLO address in Received:
1335 header lines when this was not necessary.
1337 PH/27 Added the % operator to ${eval:}.
1339 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1340 it should be ignoring failures (because with -C, for example, it has lost
1341 privilege). It wasn't ignoring creation failures other than "already
1344 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1347 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1348 because an input line was too long, either on its own, or by virtue of
1349 too many continuations, the temporary file was not being removed, and the
1350 return code was incorrect.
1352 PH/31 Missing "BOOL" in function definition in filtertest.c.
1354 PH/32 Applied Sieve patches from the maintainer.
1356 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1358 PH/33 Added "verify = not_blind".
1360 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1361 Local/Makefile (with some defaults set). These are used in built scripts
1362 such as exicyclog, but they have never been used in the exim_install
1363 script (though there are many overriding facilities there). I have
1364 arranged that the exim_install script now takes note of these two
1367 PH/35 Installed configuration files for Dragonfly.
1369 PH/36 When a locally submitted message by a trusted user did not contain a
1370 From: header, and the sender address was obtained from -f or from an SMTP
1371 MAIL command, and the trusted user did not use -F to supply a sender
1372 name, $originator_name was incorrectly used when constructing a From:
1373 header. Furthermore, $originator_name was used for submission mode
1374 messages from external hosts without From: headers in a similar way,
1375 which is clearly wrong.
1377 PH/37 Added control=suppress_local_fixups.
1379 PH/38 When log_selector = +received_sender was set, and the addition of the
1380 sender made the log line's construction buffer exactly full, or one byte
1381 less than full, an overflow happened when the terminating "\n" was
1384 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1385 when the result of a list match is failure because a DNS lookup failed.
1387 PH/40 RM_COMMAND is now used in the building process.
1389 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1390 the "build-* directories that it finds.
1392 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1393 address in a domain literal was a prefix of an interface address.
1395 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1396 when verifying a sender address, unless rewrite_headers is false.
1398 PH/44 Wrote a long comment about why errors_to addresses are verified as
1399 recipients, not senders.
1401 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1402 the ratelimit ACL was added.
1404 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1406 PH/46 Added extra information about PostgreSQL errors to the error string.
1408 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1409 avoiding the need to install special zones in a real server. This is
1410 backwards compatible; if it can't find the fake resolver, it drops back.
1411 Thus, both old and new test suites can be run.
1413 TF/02 Added util/ratelimit.pl
1415 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1416 clock is set back in time.
1418 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1419 Candler <B.Candler@pobox.com>.
1421 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1422 OK for addresses that are the result of redirections.
1424 PH/48 A number of further additions for the benefit of the new test suite,
1425 including a fake gethostbyname() that interfaces to the fake DNS resolver
1428 TF/06 The fix for widen_domains has also been applied to qualify_single and
1429 search_parents which are the other dnslookup options that can cause
1432 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1435 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1437 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1438 service" if it encountered an MX record with an empty target hostname.
1439 The message is now "an MX or SRV record indicated no SMTP service".
1441 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1442 if the DNS of the sending site is misconfigured. This is quite a
1443 common situation. This change restores the behaviour of treating a
1444 helo verification defer as a failure.
1446 PH/51 If self=fail was set on a router, the bounce message did not include the
1447 actual error message.
1453 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1455 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1456 command itself ended in error, the underlying message about the transport
1457 filter timeout was being overwritten with the pipe command error. Now the
1458 underlying error message should be appended to the second error message.
1460 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1462 PH/02 Reduce the amount of output that "make" produces by default. Full output
1463 can still be requested.
1465 PH/03 The warning log line about a condition test deferring for a "warn" verb
1466 was being output only once per connection, rather than after each
1467 occurrence (because it was using the same function as for successful
1468 "warn" verbs). This seems wrong, so I have changed it.
1470 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1471 it should not have, which might have caused a crash in the right
1472 circumstances, but probably never did.
1474 PH/04 Installed a modified version of Tony Finch's patch to make submission
1475 mode fix the return path as well as the Sender: header line, and to
1476 add a /name= option so that you can make the user's friendly name appear
1479 TF/03 Added the control = fakedefer ACL modifier.
1481 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1482 Mark Lowes for thorough testing.
1484 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1486 TK/03 Merged latest SRS patch from Miles Wilton.
1488 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1489 with the definition in sysexits.h (which is #included earlier).
1490 Fortunately, Exim does not actually use EX_OK. The code used to try to
1491 preserve the sysexits.h value, by assumimg that macro definitions were
1492 scanned for macro replacements. I have been disabused of this notion,
1493 so now the code just undefines EX_OK before #including unistd.h.
1495 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1496 in the smtp transport. When a block could not be written in a single
1497 write() function, the timeout was being re-applied to each part-write.
1498 This seems wrong - if the receiver was accepting one byte at a time it
1499 would take for ever. The timeout is now adjusted when this happens. It
1500 doesn't have to be particularly precise.
1502 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1503 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1505 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1506 without a domain if the check to <postmaster@domain> fails.
1508 SC/01 Eximstats: added -xls and the ability to specify output files
1509 (patch written by Frank Heydlauf).
1511 SC/02 Eximstats: use FileHandles for outputing results.
1513 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1515 SC/04 Eximstats: fixed display of large numbers with -nvr option
1517 SC/05 Eximstats: fixed merging of reports with empty tables.
1519 SC/06 Eximstats: added the -include_original_destination flag
1521 SC/07 Eximstats: removed tabs and trailing whitespace.
1523 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1525 TK/06 MBOX spool code: Add real "From " MBOX separator line
1526 so the .eml file is really in mbox format (even though
1527 most programs do not really care). Patch from Alex Miller.
1529 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1530 The latter is generated from $received_to and is only set if the
1531 message has one envelope recipient. SA can use these headers,
1532 obviously out-of-the-box. Patch from Alex Miller.
1534 PH/08 The ${def test on a variable was returning false if the variable's
1535 value was "0", contrary to what the specification has always said!
1536 The result should be true unless the variable is empty.
1538 PH/09 The syntax error of a character other than { following "${if
1539 def:variable_name" (after optional whitespace) was not being diagnosed.
1540 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1541 accidental colon was present, for example, could give incorrect results.
1543 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1544 result is used (not including appendfile, where other changes are about
1547 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1548 This involved changing a lot of size variables from int to off_t. It
1549 should work with maildirs and everything.
1551 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1552 spamd dying while we are connected to it.
1554 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1557 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1558 function for BDB 4.3.
1560 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1562 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1563 the sources for PCRE have been re-arranged and more files are now
1566 PH/15 The code I had for printing potentially long long variables in PH/11
1567 above was not the best (it lost precision). The length of off_t variables
1568 is now inspected at build time, and an appropriate printing format (%ld
1569 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1570 to be "long long int" or "long int". This is needed for the internal
1571 formatting function string_vformat().
1573 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1574 the configuration file to be ":syslog", then the script "guesses" where
1575 the logs files are, rather than using the compiled in default. In our
1576 case the guess is not the same as the compiled default, so the script
1577 suddenly stopped working when I started to use syslog. The patch checks
1578 to see if log_file_path is "". If so, it attempts to read it from exim
1579 with no configuration file to get the compiled in version, before it
1580 falls back to the previous guessing code."
1582 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1583 implementing BATV in an Exim configuration. See NewStuff for the gory
1586 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1587 Makefile that are specific to HP-UX.
1589 PH/18 If the "use_postmaster" option was set for a recipient callout together
1590 with the "random" option, the postmaster address was used as the MAIL
1591 FROM address for the random test, but not for the subsequent recipient
1592 test. It is now used for both.
1594 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1595 patch removes a few documentation additions to RFC 3028, because the
1596 latest draft now contains them. It adds the new en;ascii-case comparator
1597 and a new error check for 8bit text in MIME parts. Comparator and
1598 require names are now matched exactly. I enabled the subaddress
1599 extension, but it is not well tested yet (read: it works for me)."
1601 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1602 rework some of the code of TK/09 above to avoid the hardwired use of
1603 "%lld" and "long long". Replaced the call to snprintf() with a call to
1606 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1607 records point to non-existent hosts", "retry timeout exceeded", and
1608 "retry time not reached for any host after a long failure period".
1610 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1611 experimental DomainKeys support:
1613 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1614 (2) On an error such as an illegally used "control", the wrong name for
1615 the control was given.
1617 These problems did NOT occur unless DomainKeys support was compiled.
1619 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1621 PH/24 Added ${if match_ip condition.
1623 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1624 databases so that it will be absolutely obvious if a crash occurs in the
1625 DB library. This is a regular occurrence (often caused by mis-matched
1628 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1629 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1630 picked up on a user's system that detects such things. There doesn't seem
1631 to be a gcc warning option for this - only an attribute that has to be
1632 put on the function's prototype. It seems that in Fedora Core 4 they have
1633 set this on a number of new functions. No doubt there will be more in due
1636 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1637 specify a transport. However, if an address that was verified by such a
1638 router was the subject of a callout, Exim crashed because it tried to
1639 read the rcpt_include_affixes from the non-existent transport. Now it
1640 just assumes that the setting of that option is false. This bug was
1641 introduced by 4.51/PH/31.
1643 PH/28 Changed -d+all to exclude +memory, because that information is very
1644 rarely of interest, but it makes the output a lot bigger. People tend to
1645 do -d+all out of habit.
1647 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1648 code in os-type was giving problems when libc.so lives in lib64, like on
1651 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1652 aren't the modern standard, and it seems that some systems' include files
1653 don't always have them. Exim was already checking for some of the newer
1654 ones like T_AAAA, and defining it itself. I've added checks for all the
1655 record types that Exim uses.
1657 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1658 not automatically generating a new one, as it is supposed to. This
1659 prevented TLS from working. If the file did exist, but contained invalid
1660 data, a new version was generated, as expected. It was only the case of a
1661 non-existent file that was broken.
1663 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1664 with a change in libdomainkeys > 0.64.
1666 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1667 from DNS. If the selector record carries the flag, it now has
1668 precedence over the domain-wide flag.
1670 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1672 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1673 the use of a port name that isn't defined in /etc/services) occurred, the
1674 message was deferred as in a normal delivery, and thus remained on the
1675 spool, instead of being failed because of the mua_wrapper setting. This
1676 is now fixed, and I tidied up some of the mua_wrapper messages at the
1679 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1680 the messages in a hash of arrays rather than using individual hashes.
1681 This is a bit cleaner and results in dramatic memory savings, albeit
1682 at a slight CPU cost.
1684 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1685 as requested by Marc Sherman.
1687 SC/10 Eximstats: added histograms for user specified patterns as requested
1690 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1692 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1693 fopen() in the content-scanning modules that did not already have it.
1699 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1700 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1702 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1704 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1706 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1707 to test Sieve filters that use "vacation".
1709 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1710 that changes the way the GnuTLS parameters are stored in the cache file.
1711 The new format can be generated externally. For backward compatibility,
1712 if the data in the cache doesn't make sense, Exim assumes it has read an
1713 old-format file, and it generates new data and writes a new file. This
1714 means that you can't go back to an older release without removing the
1717 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1718 work if there are any delivery delays because "one_time" forces the
1719 parent to be marked "delivered", so its unseen clone is never tried
1720 again. For this reason, Exim now forbids the simultaneous setting of
1723 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1724 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1725 entry if you want to know the details. The fix, however, neglected to
1726 consider the case when local delivery batching is involved. The test for
1727 "previously delivered" was not happening when checking to see if an
1728 address could be batched with a previous (undelivered) one; under
1729 certain circumstances this could lead to multiple deliveries to the same
1732 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1733 in its include files, and this causes problems building Exim.
1735 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1736 header_syntax) but Exim was just ignoring anything given after a slash.
1737 In particular, this caused confusion with an attempt to use "verify =
1738 reverse_host_lookup/defer_ok". An error is now given when options are
1739 supplied for verify items that do not have them. (Maybe reverse_host_
1740 lookup should have a defer_ok option, but that's a different point.)
1742 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1743 defined by RFC 821) to 2048, because there were problems with some AUTH
1744 commands, and RFC 1869 says the size should be increased for extended
1745 SMTP commands that take arguments.
1747 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1750 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1751 "unknown" error; now it says that the functionality isn't in the binary.
1753 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1754 an address' error message when a string expansion fails (syntax or
1755 whatever). Otherwise the password may appear in the log. Following change
1756 PH/42 below, there is no longer a chance of it appearing in a bounce
1759 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1761 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1762 of its addresses was ever tried. (Bugzilla bug #2.)
1764 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1765 the result incorrectly in the debug output. (It correctly added a newline
1766 to what was transported.)
1768 TF/01 Added $received_time.
1770 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1771 commented out examples of how to interface to a virus scanner and to
1772 SpamAssassin. Also added commented examples of av_scanner and
1773 spamd_address settings.
1775 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1776 and controls are allowed in which ACLs. There were a couple of minor
1777 errors. Some of the entries in the conditions table (which is a table of
1778 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1779 negation of where the condition IS allowed.
1781 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1783 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1784 header file does not have a version number, so I've had to invent a new
1785 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1786 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1787 radiusclient), but it was contributed by a Radius user.
1789 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1790 files or directories, for OpenSSL.
1792 PH/19 When an Exim process that is running as root has to create an Exim log
1793 file, it does so in a subprocess that runs as exim:exim so as to get the
1794 ownership right at creation (otherwise, other Exim processes might see
1795 the file with the wrong ownership). There was no test for failure of this
1796 fork() call, which would lead to the process getting stuck as it waited
1797 for a non-existent subprocess. Forks do occasionally fail when resources
1798 run out. I reviewed all the other calls to fork(); they all seem to check
1801 PH/20 When checking for unexpected SMTP input at connect time (before writing
1802 the banner), Exim was not dealing correctly with a non-positive return
1803 from the read() function. If the client had disconnected by this time,
1804 the result was a log entry for a synchronization error with an empty
1805 string after "input=" when read() returned zero. If read() returned -1
1806 (an event I could not check), uninitialized data bytes were printed.
1807 There were reports of junk text (parts of files, etc) appearing after
1810 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1812 PH/22 Added support for macro redefinition, and (re)definition in between
1813 driver and ACL definitions.
1815 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1816 forgetting to use the resulting value; it was using the unexpanded value.
1818 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1819 hadn't been configured. The fix is from Juergen Kreileder, who
1820 understands it better than I do:
1822 "Here's what I see happening with three configured cyrus_sasl
1823 authenticators configured (plain, login, cram-md5):
1825 On startup auth_cyrus_sasl_init() gets called for each of these.
1826 This means three calls to sasl_listmech() without a specified mech_list.
1827 => SASL tests which mechs of all available mechs actually work
1828 => three warnings about OTP not working
1829 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1831 With the patch, sasl_listmech() also gets called three times. But now
1832 SASL's mech_list option is set to the server_mech specified in the the
1833 authenticator. Or in other words, the answer from sasl_listmech()
1834 gets limited to just the mech you're testing for (which is different
1836 => the return list contains just 'plain' or 'login', 'cram-md5' or
1837 nothing depending on the value of ob->server_mech.
1839 I've just tested the patch: Authentication still works fine,
1840 unavailable mechs specified in the exim configuration are still
1841 caught, and the auth.log warnings about OTP are gone."
1843 PH/25 When debugging is enabled, the contents of the command line are added
1844 to the debugging output, even when log_selector=+arguments is not
1847 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1848 answer is "GNU", and only if the return is "GNU/something" is the answer
1851 PH/27 $acl_verify_message is now set immediately after the failure of a
1852 verification in an ACL, and so is available in subsequent modifiers. In
1853 particular, the message can be preserved by coding like this:
1855 warn !verify = sender
1856 set acl_m0 = $acl_verify_message
1858 Previously, $acl_verify_message was set only while expanding "message"
1859 and "log_message" when a very denied access.
1861 PH/28 Modified OS/os.c-Linux with
1863 -#ifndef OS_LOAD_AVERAGE
1864 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1866 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1867 nomenclature these days.)
1869 PH/29 Installed patch from the Sieve maintainer that adds the options
1870 sieve_useraddress and sieve_subaddress to the redirect router.
1872 PH/30 In these circumstances:
1873 . Two addresses routed to the same list of hosts;
1874 . First host does not offer TLS;
1875 . First host accepts first address;
1876 . First host gives temporary error to second address;
1877 . Second host offers TLS and a TLS session is established;
1878 . Second host accepts second address.
1879 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1880 and peerdn, if requested) that were in fact used only for the second
1883 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1884 attention to any local part prefix or suffix that was matched by the
1885 router that accepted the address. It now behaves in the same way as it
1886 does for delivery: the affixes are removed from the local part unless
1887 rcpt_include_affixes is set on the transport.
1889 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1890 timeout during the DATA phase of an incoming message.
1892 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1893 applied a patch sanctioned by the Sieve maintainer.
1895 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1896 the uid or gid is negative. A case of a negative gid caused this to be
1897 noticed. The fix allows for either to be negative.
1899 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1900 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1903 PH/36 The change PH/12 above was broken. Fixed it.
1905 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1906 the grounds that routing the same address twice would always produce the
1907 same answer. This might have been true once, but it is certainly no
1908 longer true now. Routing a child address may depend on the previous
1909 routing that produced that child. Some complicated redirection strategies
1910 went wrong when messages had multiple recipients, and made Exim's
1911 behaviour dependent on the order in which the addresses were given.
1913 I have moved the duplicate checking until after the routing is complete.
1914 Exim scans the addresses that are assigned to local and remote
1915 transports, and removes any duplicates. This means that more work will be
1916 done, as duplicates will always all be routed, but duplicates are
1917 presumably rare, so I don't expect this is of any significance.
1919 For deliveries to pipes, files, and autoreplies, the duplicate checking
1920 still happens during the routing process, since they are not going to be
1923 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1924 It corrects a timeout issue with spamd. This is Ian's comment: "The
1925 background is that sometimes spamd either never reads data from a
1926 connection it has accepted, or it never writes response data. The exiscan
1927 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1928 blindly assumes that writes won't block so it may never time out."
1930 PH/39 Allow G after quota size as well as K and M.
1932 PH/40 The value set for $authenticated_id in an authenticator may not contain
1933 binary zeroes or newlines because the value is written to log lines and
1934 to spool files. There was no check on this. Now the value is run through
1935 the string_printing() function so that such characters are converted to
1936 printable escape sequences.
1938 PH/41 $message_linecount is a new variable that contains the total number of
1939 lines in the message. Compare $body_linecount, which is the count for the
1942 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1943 bounce and delay warning messages, except in certain special cases, which
1946 (a) An SMTP error message from a remote host;
1947 (b) A message specified in a :fail: redirection;
1948 (c) A message specified in a "fail" command in a system filter;
1949 (d) A message specified in a FAIL return from the queryprogram router;
1950 (e) A message specified by the cannot_route_message router option.
1952 In these cases only, Exim does include the error details in bounce and
1953 warning messages. There are also a few cases where bland messages such
1954 as "unrouteable address" or "local delivery error" are given.
1956 PH/43 $value is now also set for the "else" part of a ${run expansion.
1958 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1959 being worked on, but at least Exim now implements the latest version to
1962 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1963 process to complete was treated as a delivery failure, a timeout while
1964 writing the message to the pipe was logged, but erroneously treated as a
1965 successful delivery. Such timeouts include transport filter timeouts. For
1966 consistency with the overall process timeout, these timeouts are now
1967 treated as errors, giving rise to delivery failures by default. However,
1968 there is now a new Boolean option for the pipe transport called
1969 timeout_defer, which, if set TRUE, converts the failures into defers for
1970 both kinds of timeout. A transport filter timeout is now identified in
1973 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1974 systems where "make" and "gmake" are different, calling "gmake" at top
1975 level broke things. I've arranged for the value of $(MAKE) to be passed
1976 from the Makefile to this script so that it can call the same version of
1980 A note about Exim versions 4.44 and 4.50
1981 ----------------------------------------
1983 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1984 changes of various kinds. As a consequence, a big documentation update was
1985 needed. This delayed the release for rather longer than seemed good, especially
1986 in the light of a couple of (minor) security issues. Therefore, the changes
1987 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1988 release. So 4.44 and 4.50 are in effect two different branches that both start
1991 I have left the 4.50 change log unchanged; it contains all the changes since
1992 4.43. The change log for 4.44 is below; many of its items are identical to
1993 those for 4.50. This seems to be the most sensible way to preserve the
1994 historical information.
2000 1. Minor wording change to the doc/README.SIEVE file.
2002 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2003 computation of the current number of files was incorrect.
2005 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2006 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2009 4. Give more explanation in the error message when the command for a transport
2010 filter fails to execute.
2012 5. There are several places where Exim runs a non-Exim command in a
2013 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2014 was being done only for the command run by the queryprogram router. It is
2015 now done for all such subprocesses. The other cases are: ${run, transport
2016 filters, and the commands run by the lmtp and pipe transports.
2018 6. Added CONFIGURE_GROUP build-time option.
2020 7. Some older OS have a limit of 256 on the maximum number of file
2021 descriptors. Exim was using setrlimit() to set 1000 as a large value
2022 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2023 systems. I've change it so that if it can't get 1000, it tries for 256.
2025 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2026 was an oversight, and furthermore, ever since the addition of extra
2027 controls (e.g. 4.43/32), the checks on when to allow different forms of
2028 "control" were broken. There should now be diagnostics for all cases when a
2029 control that does not make sense is encountered.
2031 9. Added the /retain_sender option to "control=submission".
2033 10. $recipients is now available in the predata ACL (oversight).
2035 11. Tidy the search cache before the fork to do a delivery from a message
2036 received from the command line. Otherwise the child will trigger a lookup
2037 failure and thereby defer the delivery if it tries to use (for example) a
2038 cached ldap connection that the parent has called unbind on.
2040 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2041 of $address_data from the recipient verification was clobbered by the
2042 sender verification.
2044 13. The value of address_data from a sender verification is now available in
2045 $sender_address_data in subsequent conditions in the ACL statement.
2047 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2049 15. Added a new option "connect=<time>" to callout options, to set a different
2052 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2053 was its contents. (It was OK if the option was not defined at all.)
2055 17. A "Completed" log line is now written for messages that are removed from
2056 the spool by the -Mrm option.
2058 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2059 information about exactly what failed.
2061 19. Added -dd to debug only the daemon process.
2063 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2064 handles timeouts, both on the server side and network timeouts. Renamed the
2065 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2067 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2068 It is now set to "smtps".
2070 22. $host_address is now set to the target address during the checking of
2071 ignore_target_hosts.
2073 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2074 being passed; this would have caused $sender_host_name to have been used if
2075 matching the list had actually called for a host name (not very likely,
2076 since this list is usually IP addresses). A host name is now passed as
2079 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2080 code that specifies a non-restarting handler (typically sigaction() in
2081 modern systems) in an attempt to fix a rare and obscure crash bug.
2083 25. Narrowed the window for a race in the daemon that could cause it to ignore
2084 SIGCHLD signals. This is not a major problem, because they are used only to
2085 wake it up if nothing else does.
2087 26. A malformed maildirsize file could cause Exim to calculate negative values
2088 for the mailbox size or file count. Odd effects could occur as a result.
2089 The maildirsize information is now recalculated if the size or filecount
2092 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2093 support for a long time. Removed HAVE_SYS_VFS_H.
2095 28. Installed the latest version of exipick from John Jetmore.
2097 29. In an address list, if the pattern was not a regular expression, an empty
2098 subject address (from a bounce message) matched only if the pattern was an
2099 empty string. Non-empty patterns were not even tested. This was the wrong
2100 because it is perfectly reasonable to use an empty address as part of a
2101 database query. An empty address is now tested by patterns that are
2102 lookups. However, all the other forms of pattern expect the subject to
2103 contain a local part and a domain, and therefore, for them, an empty
2104 address still always fails if the pattern is not itself empty.
2106 30. Exim went into a mad DNS loop when attempting to do a callout where the
2107 host was specified on an smtp transport, and looking it up yielded more
2108 than one IP address.
2110 31. Re-factored the code for checking spool and log partition space into a
2111 function that finds that data and another that does the check. The former
2112 is then used to implement four new variables: $spool_space, $log_space,
2113 $spool_inodes, and $log_inodes.
2115 32. The RFC2047 encoding function was originally intended for short strings
2116 such as real names; it was not keeping to the 75-character limit for
2117 encoded words that the RFC imposes. It now respects the limit, and
2118 generates multiple encoded words if necessary. To be on the safe side, I
2119 have increased the buffer size for the ${rfc2047: expansion operator from
2122 33. It is now permitted to omit both strings after an "if" condition; if the
2123 condition is true, the result is "true". As before, when the second string
2124 is omitted, a false condition yields an empty string. This makes it less
2125 cumbersome to write custom ACL and router conditions.
2127 34. Failure to deliver a bounce message always caused it to be frozen, even if
2128 there was an errors_to setting on the router. The errors_to setting is now
2131 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2132 canonical form (fully expanded) before being placed in
2133 $sender_host_address.
2135 36. The table in the code that translates DNS record types into text (T_A to
2136 "A" for instance) was missing entries for NS and CNAME. It is just possible
2137 that this could have caused confusion if both these types were looked up
2138 for the same domain, because the text type is used as part of Exim's
2139 per-process caching. But the chance of anyone hitting this buglet seems
2142 37. The dnsdb lookup has been extended in a number of ways.
2144 (1) There is a new type, "zns", which walks up the domain tree until it
2145 finds some nameserver records. It should be used with care.
2147 (2) There is a new type, "mxh", which is like "mx" except that it returns
2148 just the host names, not the priorities.
2150 (3) It is now possible to give a list of domains (or IP addresses) to be
2151 looked up. The behaviour when one of the lookups defers can be
2152 controlled by a keyword.
2154 (4) It is now possible to specify the separator character for use when
2155 multiple records are returned.
2157 38. The dnslists ACL condition has been extended: it is now possible to supply
2158 a list of IP addresses and/or domains to be looked up in a particular DNS
2161 39. Added log_selector=+queue_time_overall.
2163 40. When running the queue in the test harness, wait just a tad after forking a
2164 delivery process, to get repeatability of debugging output.
2166 41. Include certificate and key file names in error message when GnuTLS fails
2167 to set them up, because the GnuTLS error message doesn't include the name
2168 of the failing file when there is a problem reading it.
2170 42. Allow both -bf and -bF in the same test run.
2172 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2174 44. The "Exiscan patch" is now merged into the mainline Exim source.
2176 45. Sometimes the final signoff response after QUIT could fail to get
2177 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2178 < 0 before doing a fflush(). This bug looks as though it goes back to the
2179 introduction of TLS in release 3.20, but "sometimes" must have been rare
2180 because the tests only now provoked it.
2182 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2183 (this can affect the format of dates).
2185 47. exim_tidydb, when checking for the continued existence of a message for
2186 which it has found a message-specific retry record, was not finding
2187 messages that were in split spool directories. Consequently, it was
2188 deleting retry records that should have stayed in existence.
2190 48. Steve fixed some bugs in eximstats.
2192 49. The SPA authentication driver was not abandoning authentication and moving
2193 on to the next authenticator when an expansion was forced to fail,
2194 contradicting the general specification for all authenticators. Instead it
2195 was generating a temporary error. It now behaves as specified.
2197 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2198 (the order specifies the preference for clients). The order is now AES256,
2199 AES128, 3DES, ARCFOUR128.
2201 51. Small patch to Sieve code - explicitly set From: when generating an
2204 52. Exim crashed if a remote delivery caused a very long error message to be
2205 recorded - for instance if somebody sent an entire SpamAssassin report back
2206 as a large number of 550 error lines. This bug was coincidentally fixed by
2207 increasing the size of one of Exim's internal buffers (big_buffer) that
2208 happened as part of the Exiscan merge. However, to be on the safe side, I
2209 have made the code more robust (and fixed the comments that describe what
2212 53. Now that there can be additional text after "Completed" in log lines (if
2213 the queue_time_overall log selector is set), a one-byte patch to exigrep
2214 was needed to allow it to recognize "Completed" as not the last thing in
2217 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2218 patch that reportedly fixes this has been added. I am not expert enough to
2219 create a test for it. This is what the patch creator wrote:
2221 "I found a little strange behaviour of ldap code when working with
2222 Windows 2003 AD Domain, where users was placed in more than one
2223 Organization Units. When I tried to give exim partial DN, the exit code
2224 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2225 But simultaneously result of request was absolutely normal ldap result,
2226 so I produce this patch..."
2228 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2229 REFERENCE, so I have modified the code to exclude the patch when that macro
2232 55. Some experimental protocols are using DNS PTR records for new purposes. The
2233 keys for these records are domain names, not reversed IP addresses. The
2234 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2235 leaves it alone. Component reversal etc. now happens only for IP addresses.
2238 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2240 57. Double the size of the debug message buffer (to 2048) so that more of very
2241 long debug lines gets shown.
2243 58. The exicyclog utility now does better if the number of log files to keep
2244 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2246 59. Two changes related to the smtp_active_hostname option:
2248 (1) $smtp_active_hostname is now available as a variable.
2249 (2) The default for smtp_banner uses $smtp_active_hostname instead
2250 of $primary_hostname.
2252 60. The host_aton() function is supposed to be passed a string that is known
2253 to be a valid IP address. However, in the case of IPv6 addresses, it was
2254 not checking this. This is a hostage to fortune. Exim now panics and dies
2255 if the condition is not met. A case was found where this could be provoked
2256 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2257 components; fortuitously, this particular loophole had already been fixed
2258 by change 4.50/55 above.
2260 If there are any other similar loopholes, the new check in host_aton()
2261 itself should stop them being exploited. The report I received stated that
2262 data on the command line could provoke the exploit when Exim was running as
2263 exim, but did not say which command line option was involved. All I could
2264 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2265 running as the user.
2268 61. There was a buffer overflow vulnerability in the SPA authentication code
2269 (which came originally from the Samba project). I have added a test to the
2270 spa_base64_to_bits() function which I hope fixes it.
2273 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2274 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2276 63. The daemon start-up calls getloadavg() while still root for those OS that
2277 need the first call to be done as root, but it missed one case: when
2278 deliver_queue_load_max is set with deliver_drop_privilege. This is
2279 necessary for the benefit of the queue runner, because there is no re-exec
2280 when deliver_drop_privilege is set.
2282 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2283 This has been fixed.
2285 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2286 was in use, was not putting the data itself into the right store pool;
2287 consequently, it could be overwritten for a subsequent message in the same
2288 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2291 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2293 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2294 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2295 the function were treating the return as a boolean value, which happened to
2296 work because 0=false and not-0=true, but is not correct code.
2298 68. The host_aton() function was not handling scoped IPv6 addresses (those
2299 with, for example, "%eth0" on the end) correctly.
2301 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2302 negated items (that is, ~something) in unsigned ints. Some compilers
2303 apparently mutter when there is no cast.
2305 70. If an address verification called from an ACL failed, and did not produce a
2306 user-specific message (i.e. there was only a "system" message), nothing was
2307 put in $acl_verify_message. In this situation, it now puts the system
2310 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2311 session; change 4.31/43 added the unwanted input to the log line - except
2312 that it did not do this in the start of session case. It now does.
2314 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2315 This is wrong and can cause the other end to generate a synchronization
2316 error if it is another Exim or anything else that does the synchronization
2317 check. A QUIT command is no longer sent after a timeout.
2319 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2320 during host lookups.
2322 74. The defer_ok option of callout verification was not working if it was used
2323 when verifying addresses in header lines, that is, for this case:
2325 verify = header_sender/callout=defer_ok
2327 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2328 those file descriptors could be used for SMTP connections. If anything
2329 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2330 could be sent to the SMTP client, causing chaos. The daemon now opens
2331 stdin, stdout, and stderr to /dev/null when it puts itself into the
2334 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2335 log by default. The user can override this with suitable Perl magic.
2337 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2338 the log message when discard triggers, was not working for the DATA ACL or
2339 for the non-SMTP ACL.
2341 78. Error message wording change in sieve.c.
2343 79. If smtp_accept_max_per_host was set, the number of connections could be
2344 restricted to fewer than expected, because the daemon was trying to set up
2345 a new connection before checking whether the processes handling previous
2346 connections had finished. The check for completed processes is now done
2347 earlier. On busy systems, this bug wouldn't be noticed because something
2348 else would have woken the daemon, and it would have reaped the completed
2351 80. If a message was submitted locally by a user whose login name contained one
2352 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2353 It caused a spool format error. I have fixed the spool reading code. A
2354 related problem was that the "from" clause in the Received: line became
2355 illegal because of the space(s). It is now covered by ${quote_local_part.
2357 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2360 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2362 83. Patch from Sieve maintainer to fix unterminated string problem in
2363 "vacation" handling.
2365 84. Some minor changes to the Linux configuration files to help with other
2366 OS variants using glibc.
2368 85. One more patch for Sieve to update vacation handling to latest spec.
2371 ----------------------------------------------------
2372 See the note above about the 4.44 and 4.50 releases.
2373 ----------------------------------------------------
2379 1. Change 4.43/35 introduced a bug that caused file counts to be
2380 incorrectly computed when quota_filecount was set in an appendfile
2383 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2384 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2387 3. Give more explanation in the error message when the command for a transport
2388 filter fails to execute.
2390 4. There are several places where Exim runs a non-Exim command in a
2391 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2392 was being done only for the command run by the queryprogram router. It is
2393 now done for all such subprocesses. The other cases are: ${run, transport
2394 filters, and the commands run by the lmtp and pipe transports.
2396 5. Some older OS have a limit of 256 on the maximum number of file
2397 descriptors. Exim was using setrlimit() to set 1000 as a large value
2398 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2399 systems. I've change it so that if it can't get 1000, it tries for 256.
2401 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2402 was an oversight, and furthermore, ever since the addition of extra
2403 controls (e.g. 4.43/32), the checks on when to allow different forms of
2404 "control" were broken. There should now be diagnostics for all cases when a
2405 control that does not make sense is encountered.
2407 7. $recipients is now available in the predata ACL (oversight).
2409 8. Tidy the search cache before the fork to do a delivery from a message
2410 received from the command line. Otherwise the child will trigger a lookup
2411 failure and thereby defer the delivery if it tries to use (for example) a
2412 cached ldap connection that the parent has called unbind on.
2414 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2415 of $address_data from the recipient verification was clobbered by the
2416 sender verification.
2418 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2419 was its contents. (It was OK if the option was not defined at all.)
2421 11. A "Completed" log line is now written for messages that are removed from
2422 the spool by the -Mrm option.
2424 12. $host_address is now set to the target address during the checking of
2425 ignore_target_hosts.
2427 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2428 being passed; this would have caused $sender_host_name to have been used if
2429 matching the list had actually called for a host name (not very likely,
2430 since this list is usually IP addresses). A host name is now passed as
2433 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2434 code that specifies a non-restarting handler (typically sigaction() in
2435 modern systems) in an attempt to fix a rare and obscure crash bug.
2437 15. Narrowed the window for a race in the daemon that could cause it to ignore
2438 SIGCHLD signals. This is not a major problem, because they are used only to
2439 wake it up if nothing else does.
2441 16. A malformed maildirsize file could cause Exim to calculate negative values
2442 for the mailbox size or file count. Odd effects could occur as a result.
2443 The maildirsize information is now recalculated if the size or filecount
2446 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2447 support for a long time. Removed HAVE_SYS_VFS_H.
2449 18. Updated exipick to current release from John Jetmore.
2451 19. Allow an empty sender to be matched against a lookup in an address list.
2452 Previously the only cases considered were a regular expression, or an
2455 20. Exim went into a mad DNS lookup loop when doing a callout where the
2456 host was specified on the transport, if the DNS lookup yielded more than
2459 21. The RFC2047 encoding function was originally intended for short strings
2460 such as real names; it was not keeping to the 75-character limit for
2461 encoded words that the RFC imposes. It now respects the limit, and
2462 generates multiple encoded words if necessary. To be on the safe side, I
2463 have increased the buffer size for the ${rfc2047: expansion operator from
2466 22. Failure to deliver a bounce message always caused it to be frozen, even if
2467 there was an errors_to setting on the router. The errors_to setting is now
2470 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2471 canonical form (fully expanded) before being placed in
2472 $sender_host_address.
2474 24. Updated eximstats to version 1.33
2476 25. Include certificate and key file names in error message when GnuTLS fails
2477 to set them up, because the GnuTLS error message doesn't include the name
2478 of the failing file when there is a problem reading it.
2480 26. Expand error message when OpenSSL has problems setting up cert/key files.
2483 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2484 (this can affect the format of dates).
2486 28. exim_tidydb, when checking for the continued existence of a message for
2487 which it has found a message-specific retry record, was not finding
2488 messages that were in split spool directories. Consequently, it was
2489 deleting retry records that should have stayed in existence.
2491 29. eximstats updated to version 1.35
2492 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2493 1.35 - bugfix such that pie charts by volume are generated correctly
2495 30. The SPA authentication driver was not abandoning authentication and moving
2496 on to the next authenticator when an expansion was forced to fail,
2497 contradicting the general specification for all authenticators. Instead it
2498 was generating a temporary error. It now behaves as specified.
2500 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2501 (the order specifies the preference for clients). The order is now AES256,
2502 AES128, 3DES, ARCFOUR128.
2504 31. Small patch to Sieve code - explicitly set From: when generating an
2507 32. Exim crashed if a remote delivery caused a very long error message to be
2508 recorded - for instance if somebody sent an entire SpamAssassin report back
2509 as a large number of 550 error lines. This bug was coincidentally fixed by
2510 increasing the size of one of Exim's internal buffers (big_buffer) that
2511 happened as part of the Exiscan merge. However, to be on the safe side, I
2512 have made the code more robust (and fixed the comments that describe what
2515 33. Some experimental protocols are using DNS PTR records for new purposes. The
2516 keys for these records are domain names, not reversed IP addresses. The
2517 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2518 leaves it alone. Component reversal etc. now happens only for IP addresses.
2521 34. The host_aton() function is supposed to be passed a string that is known
2522 to be a valid IP address. However, in the case of IPv6 addresses, it was
2523 not checking this. This is a hostage to fortune. Exim now panics and dies
2524 if the condition is not met. A case was found where this could be provoked
2525 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2526 components; fortuitously, this particular loophole had already been fixed
2527 by change 4.50/55 or 4.44/33 above.
2529 If there are any other similar loopholes, the new check in host_aton()
2530 itself should stop them being exploited. The report I received stated that
2531 data on the command line could provoke the exploit when Exim was running as
2532 exim, but did not say which command line option was involved. All I could
2533 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2534 running as the user.
2537 35. There was a buffer overflow vulnerability in the SPA authentication code
2538 (which came originally from the Samba project). I have added a test to the
2539 spa_base64_to_bits() function which I hope fixes it.
2542 36. The daemon start-up calls getloadavg() while still root for those OS that
2543 need the first call to be done as root, but it missed one case: when
2544 deliver_queue_load_max is set with deliver_drop_privilege. This is
2545 necessary for the benefit of the queue runner, because there is no re-exec
2546 when deliver_drop_privilege is set.
2548 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2549 was in use, was not putting the data itself into the right store pool;
2550 consequently, it could be overwritten for a subsequent message in the same
2551 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2554 38. Sometimes the final signoff response after QUIT could fail to get
2555 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2556 < 0 before doing a fflush(). This bug looks as though it goes back to the
2557 introduction of TLS in release 3.20, but "sometimes" must have been rare
2558 because the tests only now provoked it.
2564 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2565 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2566 Now it returns an integer. A number of calls were still expecting a T/F
2567 return. Fortuitously, in all cases, the tests worked in OK situations,
2568 which is the norm. However, things would have gone wrong on any write
2569 failures on the smtp file descriptor. This function is used when sending
2570 messages over SMTP and also when doing verify callouts.
2572 2. When Exim is called to do synchronous delivery of a locally submitted
2573 message (the -odf or -odi options), it no longer closes stderr before doing
2576 3. Implemented the mua_wrapper option.
2578 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2580 5. Implemented the functions header_remove(), header_testname(),
2581 header_add_at_position(), and receive_remove_recipient(), and exported them
2584 6. If an ACL "warn" statement specified the addition of headers, Exim already
2585 inserted X-ACL-Warn: at the start if there was no header name. However, it
2586 was not making this test for the second and subsequent header lines if
2587 there were newlines in the string. This meant that an invalid header could
2588 be inserted if Exim was badly configured.
2590 7. Allow an ACL "warn" statement to add header lines at the start or after all
2591 the Received: headers, as well as at the end.
2593 8. Added the rcpt_4xx retry error code.
2595 9. Added postmaster_mailfrom=xxx to callout verification option.
2597 10. Added mailfrom=xxxx to the callout verification option, for verify=
2600 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2601 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2603 12. Inserted some casts to stop certain compilers warning when using pointer
2604 differences as field lengths or precisions in printf-type calls (mostly
2605 affecting debugging statements).
2607 13. Added optional readline() support for -be (dynamically loaded).
2609 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2610 same clock tick as a message's arrival, so that its received time was the
2611 same as the "first fail" time on the retry record, and that message
2612 remained on the queue past the ultimate address timeout, every queue runner
2613 would try a delivery (because it was past the ultimate address timeout) but
2614 after another failure, the ultimate address timeout, which should have then
2615 bounced the address, did not kick in. This was a "< instead of <=" error;
2616 in most cases the first failure would have been in the next clock tick
2617 after the received time, and all would be well.
2619 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2620 being recognized when the domain list was tested by the match_domain
2621 condition in an expansion string.
2623 16. Added the ${str2b64: operator.
2625 17. Exim was always calling setrlimit() to set a large limit for the number of
2626 processes, without checking whether the existing limit was already
2627 adequate. (It did check for the limit on file descriptors.) Furthermore,
2628 errors from getrlimit() and setrlimit() were being ignored. Now they are
2629 logged to the main and panic logs, but Exim does carry on, to try to do its
2630 job under whatever limits there are.
2632 18. Imported PCRE 5.0.
2634 19. Trivial typo in log message " temporarily refused connection" (the leading
2637 20. If the log selector return_path_on_delivery was set and an address was
2638 redirected to /dev/null, the delivery process crashed because it assumed
2639 that a return path would always be set for a "successful" delivery. In this
2640 case, the whole delivery is bypassed as an optimization, and therefore no
2643 21. Internal re-arrangement: the function for sending a challenge and reading
2644 a response while authentication was assuming a zero-terminated challenge
2645 string. It's now changed to take a pointer and a length, to allow for
2646 binary data in such strings.
2648 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2650 23. Exim was not respecting finduser_retries when seeking the login of the
2651 uid under which it was called; it was always trying 10 times. (The default
2652 setting of finduser_retries is zero.) Also, it was sleeping after the final
2653 failure, which is pointless.
2655 24. Implemented tls_on_connect_ports.
2657 25. Implemented acl_smtp_predata.
2659 26. If the domain in control=submission is set empty, Exim assumes that the
2660 authenticated id is a complete email address when it generates From: or
2661 Sender: header lines.
2663 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2664 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2665 chown and chgrp in /bin and hostname in /usr/bin.
2667 28. Exim was keeping the "process log" file open after each use, just as it
2668 does for the main log. This opens the possibility of it remaining open for
2669 long periods when the USR1 signal hits a daemon. Occasional processlog
2670 errors were reported, that could have been caused by this. Anyway, it seems
2671 much more sensible not to leave this file open at all, so that is what now
2674 29. The long-running daemon process does not normally write to the log once it
2675 has entered its main loop, and it closes the log before doing so. This is
2676 so that log files can straightforwardly be renamed and moved. However,
2677 there are a couple of unusual error situations where the daemon does write
2678 log entries, and I had neglected to close the log afterwards.
2680 30. The text of an SMTP error response that was received during a remote
2681 delivery was being truncated at 512 bytes. This is too short for some of
2682 the long messages that one sometimes sees. I've increased the limit to
2685 31. It is now possible to make retry rules that apply only when a message has a
2686 specific sender, in particular, an empty sender.
2688 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2689 it possible to be selective about when SMTP synchronization is enforced.
2691 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2693 32. Implemented hosts_connection_nolog.
2695 33. Added an ACL for QUIT.
2697 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2700 35. Added mailbox_size and mailbox_filecount to appendfile.
2702 36. Added control = no_multiline_responses to ACLs.
2704 37. There was a bug in the logic of the code that waits for the clock to tick
2705 in the case where the clock went backwards by a substantial amount such
2706 that the microsecond fraction of "now" was more than the microsecond
2707 fraction of "then" (but the whole seconds number was less).
2709 38. Added support for the libradius Radius client library this is found on
2710 FreeBSD (previously only the radiusclient library was supported).
2716 1. When certain lookups returned multiple values in the form name=value, the
2717 quoting of the values was not always being done properly. Specifically:
2718 (a) If the value started with a double quote, but contained no whitespace,
2720 (b) If the value contained whitespace other than a space character (i.e.
2721 tabs or newlines or carriage returns) it was not quoted.
2722 This fix has been applied to the mysql and pgsql lookups by writing a
2723 separate quoting function and calling it from the lookup code. The fix
2724 should probably also be applied to nisplus, ibase and oracle lookups, but
2725 since I cannot test any of those, I have not disturbed their existing code.
2727 2. A hit in the callout cache for a specific address caused a log line with no
2728 reason for rejecting RCPT. Now it says "Previous (cached) callout
2729 verification failure".
2731 3. There was an off-by-one bug in the queryprogram router. An over-long
2732 return line was truncated at 256 instead of 255 characters, thereby
2733 overflowing its buffer with the terminating zero. As well as fixing this, I
2734 have increased the buffer size to 1024 (and made a note to document this).
2736 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2737 when Exim is waiting for an SMTP response from a remote server, Exim
2738 restarts its select() call on the socket, thereby resetting its timeout.
2739 This is not a problem when such interrupts are rare. Somebody set up a cron
2740 job to run exiwhat every 2 minutes, which is less than the normal select()
2741 timeout (5 or 10 minutes). This meant that the select() timeout never
2742 kicked in because it was always reset. I have fixed this by comparing the
2743 time when an interrupt arrives with the time at the start of the first call
2744 to select(). If more time than the timeout has elapsed, the interrupt is
2745 treated as a timeout.
2747 5. Some internal re-factoring in preparation for the addition of Sieve
2748 extensions (by MH). In particular, the "personal" test is moved to a
2749 separate function, and given an option for scanning Cc: and Bcc: (which is
2750 not set for Exim filters).
2752 6. When Exim created an email address using the login of the caller as the
2753 local part (e.g. when creating a From: or Sender: header line), it was not
2754 quoting the local part when it contained special characters such as @.
2756 7. Installed new OpenBSD configuration files.
2758 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2759 try to make them clearer.
2761 9. Callout options, other than the timeout value, were being ignored when
2762 verifying sender addresses in header lines. For example, when using
2764 verify = header_sender/callout=no_cache
2766 the cache was (incorrectly) being used.
2768 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2769 only the Cygwin environment.
2771 11. When return_path_on_delivery was set as a log selector, if different remote
2772 addresses in the same message used different return paths and parallel
2773 remote delivery occurred, the wrong values would sometimes be logged.
2774 (Whenever a remote delivery process finished, the return path value from
2775 the most recently started remote delivery process was logged.)
2777 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2778 lines when AUTH and/or TLS are in use. This is the "received protocol"
2779 field. Exim used to use "asmtp" for authenticated SMTP, without any
2780 indication (in the protocol name) for TLS use. Now it follows the RFC and
2781 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2782 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2783 names appear in log lines as well as in Received: header lines.
2785 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2786 extensions, and comparison tests, and to fix some bugs.
2788 14. Changes to the "personal" filter test:
2790 (1) The test was buggy in that it was just doing the equivalent of
2791 "contains" tests on header lines. For example, if a user's address was
2792 anne@some.where, the "personal" test would incorrectly be true for
2794 To: susanne@some.where
2796 This test is now done by extracting each address from the header in turn,
2797 and checking the entire address. Other tests that are part of "personal"
2798 are now done using regular expressions (for example, to check local parts
2799 of addresses in From: header lines).
2801 (2) The list of non-personal local parts in From: addresses has been
2802 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2803 taken from the Sieve specification recommendations.
2805 (3) If the message contains any header line starting with "List-" it is
2806 treated as non-personal.
2808 (4) The test for "circular" in the Subject: header line has been removed
2809 because it now seems ill-conceived.
2811 15. Minor typos in src/EDITME comments corrected.
2813 16. Installed latest exipick from John Jetmore.
2815 17. If headers_add on a router specified a text string that was too long for
2816 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2817 of string_sprintf() is now avoided.
2819 18. $message_body_size was not set (it was always zero) when running the DATA
2820 ACL and the local_scan() function.
2822 19. For the "mail" command in an Exim filter, no default was being set for
2823 the once_repeat time, causing a random time value to be used if "once" was
2824 specified. (If the value happened to be <= 0, no repeat happened.) The
2825 default is now 0s, meaning "never repeat". The "vacation" command was OK
2826 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2827 (I found it when inspecting the code).
2829 20. There is now an overall timeout for performing a callout verification. It
2830 defaults to 4 times the callout timeout, which applies to individual SMTP
2831 commands during the callout. The overall timeout applies when there is more
2832 than one host that can be tried. The timeout is checked before trying the
2833 next host. This prevents very long delays if there are a large number of
2834 hosts and all are timing out (e.g. when the network connections are timing
2835 out). The value of the overall timeout can be changed by specifying an
2836 additional sub-option for "callout", called "maxwait". For example:
2838 verify = sender/callout=5s,maxwait=20s
2840 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2841 to the end before writing, but this should make it even safer).
2843 22. Exim was forgetting that it had advertised PIPELINING for the second and
2844 subsequent messages on an SMTP connection. It was also not resetting its
2845 memory on STARTTLS and an internal HELO.
2847 23. When Exim logs an SMTP synchronization error within a session, it now
2848 records whether PIPELINING has been advertised or not.
2850 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2851 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2852 rather than long int.
2854 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2856 26. Added the never_mail option to autoreply.
2862 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2863 crash if the getsockname() call failed; this can happen if a connection is
2864 closed very soon after it is established. The problem was simply in the
2865 order in which certain operations were done, causing Exim to try to write
2866 to the SMTP stream before it had set up the file descriptor. The bug has
2867 been fixed by making things happen in the correct order.
2873 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2874 before the connection was closed, thus losing the rejection response.
2876 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2877 some early Solaris releases, but causes trouble in current releases where
2878 socklen_t is defined.
2880 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2883 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2886 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2887 that releasing the top of it at the end releases what was used for sub-
2888 expansions (unless the block got too big). However, discard this block if
2889 the first thing is a variable or header, so that we can use its block when
2890 it is dynamic (useful for very large $message_headers, for example).
2892 6. Lookups now cache *every* query, not just the most recent. A new, separate
2893 store pool is used for this. It can be recovered when all lookup caches are
2894 flushed. Lookups now release memory at the end of their result strings.
2895 This has involved some general refactoring of the lookup sources.
2897 7. Some code has been added to the store_xxx() functions to reduce the amount
2898 of flapping under certain conditions.
2900 8. log_incoming_interface used to affect only the <= reception log lines. Now
2901 it causes the local interface and port to be added to several more SMTP log
2902 lines, for example "SMTP connection from", and rejection lines.
2904 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2906 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2908 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2909 could be overwritten at the end of the current message (or the start of a
2910 new message if it was set in a HELO ACL). The value is now preserved for
2911 the duration of the SMTP connection.
2913 12. If a transport had a headers_rewrite setting, and a matching header line
2914 contained an unqualified address, that address was qualified, even if it
2915 did not match any rewriting rules. The underlying bug was that the values
2916 of the flags that permit the existence of unqualified sender and recipient
2917 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2918 non-local messages, and by -bnq for local messages) were not being
2919 preserved with the message after it was received.
2921 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2922 "next input=" as part of the text comprising the host identity instead of
2923 the correct text. The code was using the same buffer for two different
2924 strings. However, depending on which order the printing function evaluated
2925 its arguments, the bug did not always show up. Under Linux, for example, my
2926 test suite worked just fine.
2928 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2929 doesn't work with some older versions of Perl. It has been changed to "my",
2930 which in any case is probably the better facility to use.
2932 15. A really picky compiler found some instances of statements for creating
2933 error messages that either had too many or two few arguments for the format
2936 16. The size of the buffer for calls to the DNS resolver has been increased
2937 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2938 for addresses that have a lot of PTR records. This alleviates a problem; it
2939 does not fully solve it.
2941 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2942 buffer now truncates the list and logs the incident, which is the same
2943 action as happens when Exim is looking up a host name and its aliases.
2944 Previously in this situation something unpredictable would happen;
2945 sometimes it was "internal error: store_reset failed".
2947 18. If a server dropped the connection unexpectedly when an Exim client was
2948 using GnuTLS and trying to read a response, the client delivery process
2949 crashed while trying to generate an error log message.
2951 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2952 string, for example:
2954 warn message = H1: something\nH2: something
2956 the text was added as a single header line from Exim's point of view
2957 though it ended up OK in the delivered message. However, searching for the
2958 second and subsequent header lines using $h_h2: did not work. This has been
2959 fixed. Similarly, if a system filter added multiple headers in this way,
2960 the routers could not see them.
2962 20. Expanded the error message when iplsearch is called with an invalid key to
2963 suggest using net-iplsearch in a host list.
2965 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2966 ACLs are no longer actually imposed (and a message to that effect is
2969 22. If a "gecos" field in a passwd entry contained escaped characters, in
2970 particular, if it contained a \" sequence, Exim got it wrong when building
2971 a From: or a Sender: header from that name. A second bug also caused
2972 incorrect handling when an unquoted " was present following a character
2973 that needed quoting.
2975 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2976 was not being matched caselessly.
2978 24. Arranged for all hyphens in the exim.8 source to be escaped with
2981 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2982 properly. Recipient callout cache records were still being keyed to include
2983 the sender, even when use_sender was set false. This led to far more
2984 callouts that were necessary. The sender is no longer included in the key
2985 when use_sender is false.
2987 26. Added "control = submission" modifier to ACLs.
2989 27. Added the ${base62d: operator to decode base 62 numbers.
2991 28. dnsdb lookups can now access SRV records.
2993 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2994 the configuration file.
2996 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2997 (-v) mode. This makes the output for a verbose queue run more intelligible.
2999 31. Added a use_postmaster feature to recipient callouts.
3001 32. Added the $body_zerocount variable, containing the number of binary zero
3002 bytes in the message body.
3004 33. The time of last modification of the "new" subdirectory is now used as the
3005 "mailbox time last read" when there is a quota error for a maildir
3008 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3010 35. Added +ignore_unknown as a special item in host lists.
3012 36. Code for decoding IPv6 addresses in host lists is now included, even if
3013 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3014 address was recognized as an IP address, but was then not correctly decoded
3015 into binary, causing unexpected and incorrect effects when compared with
3022 1. Very minor rewording of debugging text in manualroute to say "list of
3023 hosts" instead of "hostlist".
3025 2. If verify=header_syntax was set, and a header line with an unqualified
3026 address (no domain) and a large number of spaces between the end of the
3027 name and the colon was received, the reception process suffered a buffer
3028 overflow, and (when I tested it) crashed. This was caused by some obsolete
3029 code that should have been removed. The fix is to remove it!
3031 3. When running in the test harness, delay a bit after writing a bounce
3032 message to get a bit more predictability in the log output.
3034 4. Added a call to search_tidyup() just before forking a reception process. In
3035 theory, someone could use a lookup in the expansion of smtp_accept_max_
3036 per_host which, without the tidyup, could leave open a database connection.
3038 5. Added the variables $recipient_data and $sender_data which get set from a
3039 lookup success in an ACL "recipients" or "senders" condition, or a router
3040 "senders" option, similar to $domain_data and $local_part_data.
3042 6. Moved the writing of debug_print from before to after the "senders" test
3045 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3046 problems for message scanning, either using a data ACL, or using
3047 local_scan() because the Received: header was not generated till after they
3048 were called (in order to set the time as the time of reception completion).
3049 I have revised the way this works. The header is now generated after the
3050 body is received, but before the ACL or local_scan() are called. After they
3051 are run, the timestamp in the header is updated.
3057 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3058 before starting a queue runner without re-exec. This happened only when
3059 deliver_drop_privilege was set or when the Exim user was set to root. The
3060 effect of the bug was that timeouts during subsequent deliveries caused
3061 crashes instead of being properly handled. The handler is now left at its
3062 default (and expected) setting.
3064 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3065 message, again when deliver_drop_privilege is set or Exim is run as root.
3066 The bug described in (1) was not present in this case, but the tidying up
3067 of the other signals was missing. I have made the two cases consistent.
3069 3. The ignore_target_hosts setting on a manualroute router was being ignored
3070 for hosts that were looked up using the /MX notation.
3072 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3075 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3076 operated on the sender address. After changing the $sender_address to <>
3077 for the sender address verify, Exim was re-instated it as the original
3078 (before rewriting) address, but remembering that it had rewritten it, so it
3079 wasn't rewriting it again. This bug also had the effect of breaking the
3080 sender address verification caching when the sender address was rewritten.
3082 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3083 This has been changed so that if the ip literal address matches
3084 ignore_target_hosts, the router declines.
3086 7. Added expansion conditions match_domain, match_address, and match_local_
3087 part (NOT match_host).
3089 8. The placeholder for the Received: header didn't have a length field set.
3091 9. Added code to Exim itself and to exim_lock to test for a specific race
3092 condition that could lead to file corruption when using MBX delivery. The
3093 issue is with the lockfile that is created in /tmp. If this file is removed
3094 after a process has opened it but before that process has acquired a lock,
3095 there is the potential for a second process to recreate the file and also
3096 acquire a lock. This could lead to two Exim processes writing to the file
3097 at the same time. The added code performs the same test as UW imapd; it
3098 checks after acquiring the lock that its file descriptor still refers to
3099 the same named file.
3101 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3102 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3105 11. Added the smtp_active_hostname option. If used, this will typically be made
3106 to depend on the incoming interface address. Because $interface_address is
3107 not set up until the daemon has forked a reception process, error responses
3108 that can happen earlier (such as "too many connections") no longer contain
3111 12. If an expansion in a condition on a "warn" statement fails because a lookup
3112 defers, the "warn" statement is abandoned, and the next ACL statement is
3113 processed. Previously this caused the whole ACL to be aborted.
3115 13. Added the iplsearch lookup type.
3117 14. Added ident_timeout as a log selector.
3119 15. Added tls_certificate_verified as a log selector.
3121 16. Added a global option tls_require_ciphers (compare the smtp transport
3122 option of the same name). This controls incoming TLS connections.
3124 17. I finally figured out how to make tls_require_ciphers do a similar thing
3125 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3126 before starting the TLS session.
3128 18. Tabs are now shown as \t in -bP output.
3130 19. If the log selector return_path_on_delivery was set, Exim crashed when
3131 bouncing a message because it had too many Received: header lines.
3133 20. If two routers both had headers_remove settings, and the first one included
3134 a superfluous trailing colon, the final name in the first list and the
3135 first name in the second list were incorrectly joined into one item (with a
3136 colon in the middle).
3142 1. Added -C and -D options to the exinext utility, mainly to make it easier
3143 to include in the automated testing, but these could be helpful when
3144 multiple configurations are in use.
3146 2. The exinext utility was not formatting the output nicely when there was
3147 an alternate port involved in the retry record key, nor when there was a
3148 message id as well (for retries that were specific to a specific message
3149 and a specific host). It was also confused by IPv6 addresses, because of
3150 the additional colons they contain. I have fixed the IPv4 problem, and
3151 patched it up to do a reasonable job for IPv6.
3153 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3154 delivery, the log line now contains "pipelined" if PIPELINING was used.
3156 4. An SMTP transport process used to panic and die if the bind() call to set
3157 an explicit outgoing interface failed. This has been changed; it is now
3158 treated in the same way as a connect() failure.
3160 5. A reference to $sender_host_name in the part of a conditional expansion
3161 that was being skipped was still causing a DNS lookup. This no longer
3164 6. The def: expansion condition was not recognizing references to header lines
3165 that used bh_ and bheader_.
3167 7. Added the _cache feature to named lists.
3169 8. The code for checking quota_filecount in the appendfile transport was
3170 allowing one more file than it should have been.
3172 9. For compatibility with Sendmail, the command line option
3180 and sets the incoming protocol and host name (for trusted callers). The
3181 host name and its colon can be omitted when only the protocol is to be set.
3182 Note the Exim already has two private options, -pd and -ps, that refer to
3183 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3184 "s", but I don't think that's a major issue.
3186 10. A number of refactoring changes to the code, none of which should affect
3189 (a) The number of logging options was getting close to filling up the
3190 32-bit word that was used as a bit map. I have split them into two classes:
3191 those that are passed in the argument to log_write(), and those that are
3192 only ever tested independently outside of that function. These are now in
3193 separate 32-bit words, so there is plenty of room for expansion again.
3194 There is no change in the user interface or the logging behaviour.
3196 (b) When building, for example, log lines, the code previously used a
3197 macro that called string_cat() twice, in order to add two strings. This is
3198 not really sufficiently general. Furthermore, there was one instance where
3199 it was actually wrong because one of the argument was used twice, and in
3200 one call a function was used. (As it happened, calling the function twice
3201 did not affect the overall behaviour.) The macro has been replaced by a
3202 function that can join an arbitrary number of extra strings onto a growing
3205 (c) The code for expansion conditions now uses a table and a binary chop
3206 instead of a serial search (which was left over from when there were very
3207 few conditions). Also, it now recognizes conditions like "pam" even when
3208 the relevant support is not compiled in: a suitably worded error message is
3209 given if an attempt is made to use such a condition.
3211 11. Added ${time_interval:xxxxx}.
3213 12. A bug was causing one of the ddress fields not to be passed back correctly
3214 from remote delivery subprocesses. The field in question was not being
3215 subsequently used, so this caused to problems in practice.
3217 13. Added new log selectors queue_time and deliver_time.
3219 14. Might have fixed a bug in maildirsizefile handling that threw up
3220 "unexpected character" debug warnings, and recalculated the data
3221 unnecessarily. In any case, I expanded the warning message to give more
3224 15. Added the message "Restricted characters in address" to the statements in
3225 the default ACL that block characters like @ and % in local parts.
3227 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3228 Three changes have been made:
3230 (a) There was a serious bug; a negative response to MAIL caused the whole
3231 recipient domain to be cached as invalid, thereby blocking all messages
3232 to all local parts at the same domain, from all senders. This bug has
3233 been fixed. The domain is no longer cached after a negative response to
3234 MAIL if the sender used is not empty.
3236 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3239 (c) A new callout option, "use_sender" has been added for people who want
3240 the modified behaviour.
3246 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3249 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3250 indeed breaks things for older releases.
3252 3. Added additional logging to the case where there is a problem reading data
3253 from a filter that is running in a subprocess using a pipe, in order to
3254 try to track down a specific problem.
3256 4. Testing facility fudge: when running in the test harness and attempting
3257 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3258 getting "No route to host". Convert this to a timeout.
3260 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3263 6. Some OS don't have socklen_t but use size_t instead. This affects the
3264 fifth argument of getsockopt() amongst other things. This is now
3265 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3266 can be set for individual OS. I have set it for SunOS5, OSF1, and
3267 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3268 some earlier ones do not.
3270 7. Change 4.30/15 was not doing the test caselessly.
3272 8. The standard form for an IPv6 address literal was being rejected by address
3273 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3274 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3275 this, as well as the form without the "IPv6" on the front (but only when
3276 address literals are enabled, of course).
3278 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3280 10. Exim crashed if a message with an empty sender address specified by -f
3281 encountered a router with an errors_to setting. This could be provoked only
3282 by a command such as
3286 where an empty string was supplied; "<>" did not hit this bug.
3288 11. Installed PCRE release 4.5.
3290 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3291 remained set. It is now erased.
3293 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3294 times from message ids (which are base 36 rather than the normal 62).
3296 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3297 were being counted as actual protocol errors, and logged if the log
3298 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3299 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3300 and DATA following a set of rejected RCPTs do not count as protocol errors.
3301 In other words, Exim assumes they were pipelined, though this may not
3302 actually be the case. Of course, in all cases the client gets an
3303 appropriate error code.
3305 15. If a lookup fails in an ACL condition, a message about the failure may
3306 be available; it is used if testing the ACL cannot continue, because most
3307 such messages specify what the cause of the deferral is. However, some
3308 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3309 that caused an old message to be retained and used if a later statement
3310 caused a defer, replacing the real cause of the deferral.
3312 16. If an IP address had so many PTR records that the DNS lookup buffer
3313 was not large enough to hold them, Exim could crash while trying to process
3314 the truncated data. It now detects and logs this case.
3316 17. Further to 4.21/58, another change has been made: if (and only if) the
3317 first line of a message (the first header line) ends with CRLF, a bare LF
3318 in a subsequent header line has a space inserted after it, so as not to
3319 terminate the header.
3321 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3322 unnecessarily, used atoi() instead of strtol(), and didn't check the
3323 termination when getting file sizes from file names by regex.
3325 19. Completely re-implemented the support for maildirsize files, in the light
3326 of a number of problems with the previous contributed implementation
3327 (4.30/29). In particular:
3329 . If the quota is zero, the maildirsize file is maintained, but no quota is
3332 . If the maildir directory does not exist, it is created before any attempt
3333 to write a maildirsize file.
3335 . The quota value in the file is just a cache; if the quota is changed in
3336 the transport, the new value overrides.
3338 . A regular expression is available for excluding directories from the
3341 20. The autoreply transport checks the characters in options that define the
3342 message's headers; it allows continued headers, but it was checking with
3343 isspace() after an embedded newline instead of explicitly looking for a
3346 21. If all the "regular" hosts to which an address was routed had passed their
3347 expiry times, and had not reached their retry times, the address was
3348 bounced, even if fallback hosts were defined. Now Exim should go on to try
3351 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3352 equivalent code in the SMTP transport. Some hosts send humungous responses
3353 to HELO/EHLO, more than 1024 it seems.
3355 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3356 gives compiler warnings in some environments. I've now done it "properly",
3359 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3360 (because of problems with the built-in one) was declared to return uschar *
3361 instead of char *, causing compiler failure.
3363 25. Fixed a file descriptor leak when processing alias/forward files.
3365 26. Fixed a minor format string issue in dbfn.c.
3367 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3369 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3370 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3373 29. When a sender address is verified, it is cached, to save repeating the test
3374 when there is more than one recipient in a message. However, when the
3375 verification involves a callout, it is possible for different callout
3376 options to be set for different recipients. It is too complicated to keep
3377 track of this in the cache, so now Exim always runs a verification when a
3378 callout is required, relying on the callout cache for the optimization.
3379 The overhead is duplication of the address routing, but this should not be
3382 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3383 to be verified with callout=postmaster, and the main callout worked but the
3384 postmaster check failed, the verification correctly failed. However, if a
3385 subsequent RCPT command asked for sender verification *without* the
3386 postmaster check, incorrect caching caused this verification also to fail,
3389 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3390 it was not caching the DNS options (qualify_single, search_parents) that
3391 were used when the lookup failed. A subsequent lookup with different
3392 options therefore always gave the same answer, though there were cases
3393 where it should not have. (Example: a "domains = !$mx_any" option on a
3394 dnslookup router: the "domains" option is always processed without any
3395 widening, but the router might have qualify_single set.) Now Exim uses the
3396 cached value only when the same options are set.
3398 32. Added John Jetmore's "exipick" utility to the distribution.
3400 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3401 than a timeout (e.g. a certificate is required, and is not provided), an
3402 Exim server now closes the connection immediately. Previously it waited for
3403 the client to close - but if the client is SSL, it seems that they each
3404 wait for each other, leading to a delay before one of them times out.
3406 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3407 maintained 0.8.x compatibility because I don't think many are using it, and
3408 it is clearly obsolete.
3410 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3413 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3414 client certificate was expired. A simple patch fixes this, though I don't
3415 understand the full logic of why the verify callback is called multiple
3418 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3419 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3420 which causes problems with some clients (such as the Certicom SSL Plus
3421 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3422 disables the coutermeasure allowing Eudora to connect."
3424 38. Exim was not checking that a write() to a log file succeeded. This could
3425 lead to Bad Things if a log got too big, in particular if it hit a file
3426 size limit. Exim now panics and dies if it cannot write to a log file, just
3427 as it does if it cannot open a log file.
3429 39. Modified OS/Makefile-Linux so that it now contains
3431 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3433 The two -D definitions ensure that Exim is compiled with large file
3434 support, which makes it possible to handle log files that are bigger than
3437 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3438 instance) a domain was checked against a named list that involved a lookup,
3439 causing $domain_data to be set, then another domain was checked against the
3440 same list, then the first domain was re-checked, the value of $domain_data
3441 after the final check could be wrong. In particular, if the second check
3442 failed, it could be set empty. This bug probably also applied to
3445 41. The strip_trailing_dot option was not being applied to the address given
3446 with the -f command-line option.
3448 42. The code for reading a message's header from the spool was incrementing
3449 $received_count, but never initializing it. This meant that the value was
3450 incorrect (doubled) while delivering a message in the same process in which
3451 it was received. In the most common configuration of Exim, this never
3452 happens - a fresh exec is done - but it can happen when
3453 deliver_drop_privilege is set.
3455 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3456 it now includes up to 150 characters of the unexpected data in the log
3459 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3460 and building data strings. The size of both of these buffers was 10 000
3461 bytes - far larger than anybody would *ever* want, thought I. Needless to
3462 say, somebody hit the limit. I have increased the maximum line length to
3463 20 000 and the maximum data length of concatenated lines to 100 000. I have
3464 also fixed two bugs, because there was no checking on these buffers. Tsk,
3465 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3466 buffer is too small.
3468 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3469 lsearch lookups. Now it does.
3471 46. When parsing a route_list item in a manualroute router, a fixed-length
3472 buffer was used for the list of hosts. I made this 1024 bytes long,
3473 thinking that nobody would ever have a list of hosts that long. Wrong.
3474 Somebody had a whole pile of complicated expansion conditions, and the
3475 string was silently truncated, leading to an expansion error. It turns out
3476 that it is easier to change to an unlimited length (owing to other changes
3477 that have happened since this code was originally written) than to build
3478 structure for giving a limitation error. The length of the item that
3479 expands into the list of hosts is now unlimited.
3481 47. The lsearch lookup could not handle data where the length of text line was
3482 more than 4095 characters. Such lines were truncated, leading to shortened
3483 data being returned. It should now handle lines of any length.
3485 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3486 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3489 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3490 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3491 no longer happens in comment lines. A list of replacements is now placed
3492 at the head of all of the source files, except those whose only change is
3493 to replace PERL_COMMAND in the very first #! line.
3495 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3496 messages on the queue, with a bottom-up merge sort, using code contributed
3497 by Michael Haardt. This should make operations like -bp somewhat faster on
3498 large queues. It won't affect queue runners, except when queue_run_in_order
3501 51. Installed eximstats 1.31 in the distribution.
3503 52. Added support for SRV lookups to the dnslookup router.
3505 53. If an ACL referred to $message_body or $message_body_end, the value was not
3506 reset for any messages that followed in the same SMTP session.
3508 54. The store-handling optimization for building very long strings was not
3509 differentiating between the different store pools. I don't think this
3510 actually made any difference in practice, but I've tidied it.
3512 55. While running the routers to verify a sender address, $sender_address
3513 was still set to the sender address. This is wrong, because when routing to
3514 send a bounce to the sender, it would be empty. Therefore, I have changed
3515 it so that, while verifying a sender address, $sender_address is set to <>.
3516 (There is no change to what happens when verifying a recipient address.)
3518 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3519 target A or AAAA records (if not already returned) without resetting the
3520 qualify_single or search_parents options of the DNS resolver. These are
3521 inappropriate in this case because the targets of MX and SRV records must
3522 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3523 target that, when qualified, matched something in the local domain. These
3524 two options are now turned off when doing these lookups.
3526 57. It seems that at least some releases of Reiserfs (which does not have the
3527 concept of a fixed number of inodes) returns zero and not -1 for the
3528 number of available inodes. This interacted badly with check_spool_inodes,
3529 which assumed that -1 was the "no such thing" setting. What I have done is
3530 to check that the total number of inodes is greater than zero before doing
3531 the test of how many are available.
3533 58. When a "warn" ACL statement has a log_message modifier, the message is
3534 remembered, and not repeated. This is to avoid a lot of repetition when a
3535 message has many recipients that cause the same warning to be written.
3536 Howewer, Exim was preserving the list of already written lines for an
3537 entire SMTP session, which doesn't seem right. The memory is now reset if a
3538 new message is started.
3540 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3541 debugging output unless log_rewrite was also set.
3543 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3544 of (int)(handle) when we know that handle contains (void *)(-1).
3546 61. The Exim daemon panic-logs an error return when it closes the incoming
3547 connection. However "connection reset by peer" seems to be common, and
3548 isn't really an error worthy of noting specially, so that particular error
3551 62. When Exim is trying to find all the local interfaces, it used to panic and
3552 die if the ioctl to get the interface flags failed. However, it seems that
3553 on at least one OS (Solaris 9) it is possible to have an interface that is
3554 included in the list of interfaces, but for which you get a failure error
3555 for this call. This happens when the interface is not "plumbed" into a
3556 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3557 failure of the "get flags" call assumes that the interface is down.
3559 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3560 makes life easier for people who are doing arithmetic on fields extracted
3561 from dates, where you often get leading zeros that should not be
3562 interpreted as octal.
3564 64. Added qualify_domain to the redirect router, to override the global
3567 65. If a pathologically long header line contained very many addresses (the
3568 report of this problem mentioned 10 000) and each of them was rewritten,
3569 Exim could use up a very large amount of memory. (It kept on making new
3570 copies of the header line as it rewrote, and never released the old ones.)
3571 At the expense of a bit more processing, the header rewriting function has
3572 been changed so that it no longer eats memory in this way.
3574 66. The generation of the Received: header has been moved from the time that a
3575 message starts to be received, to the time that it finishes. The timestamp
3576 in the Received: header should now be very close to that of the <= log
3577 line. There are two side-effects of this change:
3579 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3580 logged header lines no longer include the local Received: line, because
3581 it has not yet been created. The same applies to a copy of the message
3582 that is returned to a non-SMTP sender when a message is rejected.
3584 (b) When a filter file is tested using -bf, no additional Received: header
3585 is added to the test message. After some thought, I decided that this
3588 This change does not affect the value of $received_for. It is still set
3589 after address rewriting, but before local_scan() is called.
3591 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3593 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3594 gave an unhelpful panic error message, and a defer error. I have managed to
3595 change this behaviour so that it now rejects any supplied certificate,
3596 which seems right, as the list of acceptable certificates is empty.
3598 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3599 gave an unhelpful defer error. I have not managed to make this reject any
3600 supplied certificates, but the error message it gives is "no certificate
3601 supplied", which is not helpful.
3603 70. exigrep's output now also includes lines that are not associated with any
3604 message, but which match the given pattern. Implemented by a patch from
3605 Martin Sluka, which also tidied up the Perl a bit.
3607 71. Recipient callout verification, like sender verification, was using <> in
3608 the MAIL FROM command. This isn't really the right thing, since the actual
3609 sender may affect whether the remote host accepts the recipient or not. I
3610 have changed it to use the actual sender in the callout; this means that
3611 the cache record is now keyed on a recipient/sender pair, not just the
3612 recipient address. There doesn't seem to be a real danger of callout loops,
3613 since a callout by the remote host to check the sender would use <>.
3614 [SEE ABOVE: changed after hitting problems.]
3616 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3617 temporary errors. However, in the case of such a code being given after
3618 the end of a data transmission (i.e. after ".") Exim was failing to write
3619 a retry record for the message. (Yes, there was some broken host that was
3620 actually sending 8xx at this point.)
3622 73. An unknown lookup type in a host list could cause Exim to panic-die when
3623 the list was checked. (An example that provoked this was putting <; in the
3624 middle of a list instead of at the start.) If this happened during a DATA
3625 ACL check, a -D file could be left lying around. This kind of configuration
3626 error no longer causes Exim to die; instead it causes a defer errror. The
3627 incident is still logged to the main and panic logs.
3629 74. Buglet left over from Exim 3 conversion. The message "too many messages
3630 in one connection" was written to the rejectlog but not the mainlog, except
3631 when address rewriting (yes!) was being logged.
3633 75. Added write_rejectlog option.
3635 76. When a system filter was run not as root (that is, when system_filter_user
3636 was set), the values of the $n variables were not being returned to the
3637 main process; thus, they were not subsequently available in the $sn
3640 77. Added +return_path_on_delivery log selector.
3642 78. A connection timeout was being treated differently from recipients deferred
3643 when testing hosts_max_try with a message that was older than the host's
3644 retry timeout. (The host should not be counted, thus allowing all hosts to
3645 be tried at least once before bouncing.) This may have been the cause of an
3646 occasionally reported bug whereby a message would remain on the queue
3647 longer than the retry timeout, but would be bounced if a delivery was
3648 forced. I say "may" because I never totally pinned down the problem;
3649 setting up timeout/retry tests is difficult. See also the next item.
3651 79. The ultimate address timeout was not being applied to errors that involved
3652 a combination of host plus message (for example, a timeout on a MAIL
3653 command). When an address resolved to a number of possible hosts, and they
3654 were not all tried for each delivery (e.g. because of hosts_max_try), a
3655 message could remain on the queue longer than the retry timeout.
3657 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3660 81. Fixed an obscure SMTP outgoing bug which required at least the following
3661 conditions: (a) there was another message waiting for the same server;
3662 (b) the server returned 5xx to all RCPT commands in the first message so
3663 that the message was not completed; (c) the server dropped the connection
3664 or gave a negative response to the RSET that Exim sends to abort the
3665 transaction. The observed case was a dropped connection after DATA that had
3666 been sent in pipelining mode. That is, the server had advertised PIPELINING
3667 but was not implementing it correctly. The effect of the bug was incorrect
3668 behaviour, such as trying another host, and this could lead to a crash.
3674 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3675 and daemon.c were passed as pointers to ints; they should have been
3676 pointers to socklen_t variables (which are typically unsigned ints).
3678 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3681 3. Fixed a really odd bug that affected only the testing scheme; patching a
3682 certain fixed string in the binary changed the value of another string that
3683 happened to be identical to the end of the original first string.
3685 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3686 name", it returns that address as the IP address. On some operating
3687 systems (e.g. Solaris), it also passes back the IP address string as the
3688 "host name". However, on others (e.g. Linux), it passes back an empty
3689 string. Exim wasn't checking for this, and was changing the host name to an
3690 empty string, assuming it had been canonicized.
3692 5. Although rare, it is permitted to have more than one PTR record for a given
3693 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3694 all the names associated with an address, because they do in Solaris.
3695 However, it seems that they do not in Linux for data that comes from the
3696 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3697 I found this out when I moved to a new Linux workstation and tried to run
3698 the Exim test suite.
3700 To get round this problem I have changed the code so that it now does its
3701 own call to the DNS to look up PTR records when searching for a host name.
3702 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3703 addresses that are only in /etc/hosts are still found.
3705 This behaviour is, however, controlled by an option called host_lookup_
3706 order, which defaults to "bydns:byaddr". If people want to use the other
3707 order, or indeed, just use one or the other means of lookup, they can
3708 specify it in this variable.
3710 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3711 some operating systems, this comes back from gethostbyaddr() as an empty
3712 string, and this is what Exim used to test for. However, it seems that in
3713 other systems, "." is yielded. Exim now tests for this case too.
3715 7. The values of check_spool_space and check_log_space are now held internally
3716 as a number of kilobytes instead of an absolute number of bytes. If a
3717 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3718 kilobyte. This means that much larger values can be stored.
3720 8. Exim monitor: an attempt to get the action menu when not actually pointing
3721 at a message produces an empty menu entitled "No message selected". This
3722 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3723 no entries in it ("Shell widget menu has zero width and/or height"). So I
3724 have added a single, blank menu entry in this case.
3726 9. Added ${quote_local_part.
3728 10. MIME decoding is now applied to the contents of Subject: header lines when
3731 11. Now that a reference to $sender_host_address automatically causes a reverse
3732 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3733 host lookup before query-style lookups in lists that might use this
3734 variable. This has therefore been abolished, and the "net-" prefix is no
3735 longer necessary for query-style lookups.
3737 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3738 have been a typo for LFLAGS, so it has been changed.
3740 13. The install script calls Exim with "-C /dev/null" in order to find the
3741 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3742 to be output. Howeve, since Exim outputs its version number before the
3743 error, it didn't break the script. It just looked ugly. I fixed this by
3744 always allowing "-C /dev/null" if the caller is root.
3746 14. Ignore overlarge ACL variable number when reading spool file - insurance
3747 against a later release with more variables having written the file.
3749 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3750 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3751 this, as well as the form without the "IPv6" on the front.
3753 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3754 OS/Makefile-Darwin file.
3756 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3757 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3759 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3760 variable. However, some OS use ints for inodes. I've added cast to long int
3761 to get rid of the compiler warning.
3763 19. I had forgotten to lock out "/../" in configuration file names when
3764 ALT_CONFIG_PREFIX was set.
3766 20. Routers used for verification do not need to specify transports. However,
3767 if such a router generated a host list, and callout was configured, Exim
3768 crashed, because it could not find a port number from the (non-existent)
3769 transport. It now assumes port 25 in this circumstance.
3771 21. Added the -t option to exigrep.
3773 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3774 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3775 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3776 them is set, LOOKUP_LSEARCH is forced.
3778 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3780 24. Added sender and host information to the "rejected by local_scan()" log
3781 line; previously there was no indication of these.
3783 25. Added .include_if_exists.
3785 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3786 Linux. It turns out that not all file systems support this. Apparently some
3787 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3788 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3789 not supported on the file descriptor, is now ignored when Exim is trying to
3790 sync a directory. This applies only to Linux.
3792 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3794 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3795 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3798 29. Added support for maildirsize files from supplied patch (modified a bit).
3800 30. The use of :fail: followed by an empty string could lead Exim to respond to
3801 sender verification failures with (e.g.):
3803 550 Verification failed for <xxx>
3804 550 Sender verify failed
3806 where the first response line was missing the '-' that indicates it is not
3807 the final line of the response.
3809 31. The loop for finding the name of the user that called Exim had a hardwired
3810 limit of 10; it now uses the value of finduser_retries, which is used for
3811 all other user lookups.
3813 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3816 33. Exim was neglecting to zero errno before one call of strtol() when
3817 expanding a string and expecting an integer value. On some systems this
3818 resulted in spurious "integer overflow" errors. Also, it was casting the
3819 result into an int without checking.
3821 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3822 did not work. The code looks as if it has *never* worked, though it appears
3823 to have been documented since at least releast 1.62. I have made it work.
3825 35. The "timeout_DNS" error in retry rules, also documented since at least
3826 1.62, also never worked. As it isn't clear exactly what this means, and
3827 clearly it isn't a major issue, I have abolished the feature by treating it
3828 as "timeout", and writing a warning to the main and panic logs.
3830 36. The display of retry rules for -brt wasn't always showing the error code
3833 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3834 timeout_connect_A, timeout_connect_MX.
3836 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3837 to the empty sender.
3839 39. The daemon was not analysing the content of -oX till after it had closed
3840 stderr and disconnected from the controlling terminal. This meant that any
3841 syntax errors were only noted on the panic log, and the return code from
3842 the command was 0. By re-arranging the code a little, I've made the
3843 decoding happen first, so such errors now appear on stderr, and the return
3844 code is 1. However, the actual setting up of the sockets still happens in
3845 the disconnected process, so errors there are still only recorded on the
3848 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3849 connections (as happens on some IP stacks) was logged at start up time as
3850 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3851 it from "IPv6 and IPv4", which means that two separate sockets are being
3854 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3855 says whether AF_INET or AF_INET6 was passed as an argument.
3857 42. Exiwhat output was messed up when time zones were included in log
3860 43. Exiwhat now gives more information about the daemon's listening ports,
3861 and whether -tls-on-connect was used.
3863 44. The "port" option of the smtp transport is now expanded.
3865 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3866 silently ignored. Now an error message is written to the main and panic
3869 46. There's a new ACL modifier called "logwrite" which writes to a log file
3870 as soon as it is encountered.
3872 47. Added $local_user_uid and $local_user_gid at routing time.
3874 48. Exim crashed when trying to verify a sender address that was being
3877 49. Exim was recognizing only a space character after ".include". It now also
3878 recognizes a tab character.
3880 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3881 extracting the relevant information from the specification. The man page no
3882 longer contains scrambled data for the -d option, and I've added a section
3883 at the front about calling Exim under different names.
3885 51. Added "extra_headers" argument to the "mail" command in filter files.
3887 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3890 53. Installed eximstats 1.29.
3892 54. Added transport_filter_timeout as a generic transport option.
3894 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3895 Cc: header lines. This was required by RFC 822, but it not required by RFC
3898 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3899 incoming messages that did not have them. Now it does so only if the
3900 message originates locally, that is, if there is no associated remote host
3901 address. When Resent- header lines are present, this applies to the Resent-
3902 lines rather than the non-Resent- lines.
3904 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3905 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3907 58. Messages for configuration errors now include the name of the main
3908 configuration file - useful now that there may be more than one file in a
3909 list (.included file names were always shown).
3911 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3912 for those rare installations that do not start the daemon as root or run it
3913 setuid root. I've cut out the call to initgroups() if the daemon is not
3916 60. The Exim user and group can now be bound into the binary as text strings
3917 that are looked up at the start of Exim's processing.
3919 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3921 62. Added $mailstore_basename variable.
3923 63. Installed patch to sieve.c from Michael Haardt.
3925 64. When Exim failed to open the panic log after failing to open the main log,
3926 the original message it was trying to log was written to stderr and debug
3927 output, but if they were not available (the usual case in production), it
3928 was lost. Now it is written to syslog before the two lines that record the
3929 failures to open the logs.
3931 65. Users' Exim filters run in subprocesses under the user's uid. It is
3932 possible for a "deliver" command or an alias in a "personal" command to
3933 provoke an address rewrite. If logging of address rewriting is configured,
3934 this fails because the process is not running as root or exim. There may be
3935 a better way of dealing with this, but for the moment (because 4.30 needs
3936 to be released), I have disabled address rewrite logging when running a
3937 filter in a non-root, non-exim process.
3943 1. The buildconfig auxiliary program wasn't quoting the value set for
3944 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3945 not defined. This bug was masked in 4.22 by the effect that was fixed in
3948 2. Some messages that were rejected after a message id was allocated were
3949 shown as "incomplete" by exigrep. It no longer does this for messages that
3950 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3952 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3953 have allow_domain_literals set, the ID did not get logged in the <= line.
3954 Domain literals are now always recognized in Message-ID: header lines.
3956 4. The first argument for a ${extract expansion item is the key name or field
3957 number. Leading and trailing spaces in this item were not being ignored,
3958 causing some misleading effects.
3960 5. When deliver_drop_privilege was set, single queue runner processes started
3961 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3962 same command in the process it spins off) were not dropping privilege.
3964 6. When the daemon running as "exim" started a queue runner, it always
3965 re-executed Exim in the spun-off process. This is a waste of effort when
3966 deliver_drop_privilege is set. The new process now just calls the
3967 queue-runner function directly.
3973 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3976 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3977 ignored. Though the use of -oP was forcing the writing of a pid file, it
3978 was always written to the default place.
3980 3. If the message "no IP address found for host xxxx" is generated during
3981 incoming verification, it is now followed by identification of the incoming
3982 connection (so you can more easily find what provoked it).
3984 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3986 5. Added some features to "harden" Exim a bit more against certain attacks:
3988 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3989 be put in Local/Makefile. This is like the never_users runtime option,
3990 but it cannot be overridden. The default setting is "root".
3992 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3993 prefix string with which any file named in a -C command line option
3996 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3997 is retained for -C and -D only if the caller of Exim is root. Without
3998 it, the exim user may also use -C and -D and retain privilege.
4000 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4001 command line option is disabled.
4003 6. Macro names set by the -D option must start with an upper case letter, just
4004 like macro names defined in the configuration file.
4006 7. Added "dereference=" facility to LDAP.
4008 8. Two instances of the typo "uknown" in the source files are fixed.
4010 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4011 the Configure-Makefile script screwed up while processing it.
4013 10. Incorporated PCRE 4.4.
4015 11. The SMTP synchronization check was not operating right at the start of an
4016 SMTP session. For example, it could not catch a HELO sent before the client
4017 waited for the greeting. There is now a check for outstanding input at the
4018 point when the greeting is written. Because of the duplex, asynchronous
4019 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4020 way, but not yet received, when the check is performed.
4022 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4023 on TCP/IP sockets, because this apparently causes some broken clients to
4026 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4027 unchanged) from the Cygwin maintainer.
4029 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4030 was supported instead of testing for mbx. Effectively a typo.
4032 15. The spa authenticator server code was not checking that the input it
4033 received was valid base64.
4035 16. The debug output line for the "set" modifier in ACLs was not showing the
4036 name of the variable that was being set.
4038 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4040 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4041 lookup on its own. Something else was needed to trigger the lookup. For
4042 example, a match in host_lookup or the need for a host name in a host list.
4043 Now, if $sender_host_name is referenced and the host name has not yet been
4044 looked up, a lookup is performed. If the lookup fails, the variable remains
4045 empty, and $host_lookup_failed is set to "1".
4047 19. Added "eqi" as a case-independent comparison operator.
4049 20. The saslauthd authentication condition could segfault if neither service
4050 nor realm was specified.
4052 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4053 error message that was logged was misleading, and incoming SMTP
4054 connections were dropped. The message is now more accurate, and temporary
4055 errors are given to SMTP connections.
4057 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4058 (except RSET) with a 421 error, until QUIT is received. However, it was
4059 failing to send a response to QUIT.
4061 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4062 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4063 ACL is now run after the helo_try_verify_hosts code.
4065 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4066 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4067 case-independent, so other case variants are also recognized). Apparently
4068 some systems use these upper case variants.
4070 25. If more than two messages were waiting for the same host, and a transport
4071 filter was specified for the transport, Exim sent two messages over the
4072 same TCP/IP connection, and then failed with "socket operation on non-
4073 socket" when it tried to send the third.
4075 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4077 27. The extern definition of crypt16() in expand.c was not being excluded when
4078 the OS had its own crypt16() function.
4080 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4081 as a preferred synonym for return_size_limit, both as an option and as an
4084 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4086 30. Changed the default configuration ACL to relax the local part checking rule
4087 for addresses that are not in any local domains. For these addresses,
4088 slashes and pipe symbols are allowed within local parts, but the sequence
4089 /../ is explicitly forbidden.
4091 31. SPA server authentication was not clearing the challenge buffer before
4094 32. log_message in a "warn" ACL statement was writing to the reject log as
4095 well as to the main log, which contradicts the documentation and doesn't
4096 seem right (because no rejection is happening). So I have stopped it.
4098 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4099 However, I am unable to do any testing of this.
4101 34. Fixed an infelicity in the appendfile transport. When checking directories
4102 for a mailbox, to see if any needed to be created, it was accidentally
4103 using path names with one or more superfluous leading slashes; tracing
4104 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4106 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4107 contents are added to the log line that is written for every discarded
4108 recipient. (Previously a log_message setting was ignored.)
4110 36. The ${quote: operator now quotes the string if it is empty.
4112 37. The install script runs exim in order to find its version number. If for
4113 some reason other than non-existence or emptiness, which it checks, it
4114 could not run './exim', it was installing it with an empty version number,
4115 i.e. as "exim-". This error state is now caught, and the installation is
4118 38. An argument was missing from the function that creates an error message
4119 when Exim fails to connect to the socket for saslauthd authentication.
4120 This could cause Exim to crash, or give a corrupted message.
4122 39. Added isip, isip4, and isip6 to ${if conditions.
4124 40. The ACL variables $acl_xx are now saved with the message, and can be
4125 accessed later in routers, transports, and filters.
4127 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4128 strings in the file are not string-expanded.
4130 42. If a MAIL command specified a SIZE value that was too large to fit into an
4131 int variable, the check against message_size_limit failed. Such values are
4132 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4133 day this will have to be increased, but I don't think I want to be around
4134 when emails are that large.
4141 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4142 iconv() is not standard in FreeBSD.
4144 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4145 IPv6 enabled. The observed symptom was a segmentation fault on return from
4146 the function os_common_find_running_interfaces() in src/os.c.
4148 3. In the check_special_case() function in daemon.c I had used "errno" as an
4149 argument name, which causes warnings on some systems. This was basically a
4150 typo, since it was named "eno" in the comments!
4152 4. The code that waits for the clock to tick (at a resolution of some fraction
4153 of a second) so as to ensure message-id uniqueness was always waiting for
4154 at least one whole tick, when it could have waited for less. [This is
4155 almost certainly not relevant at current processor speeds, where it is
4156 unlikely to ever wait at all. But we try to future-proof.]
4158 5. The function that sleeps for a time interval that includes fractions of a
4159 second contained a race. It did not block SIGALRM between setting the
4160 timer, and suspending (a couple of lines later). If the interval was short
4161 and the sigsuspend() was delayed until after it had expired, the suspension
4162 never ended. On busy systems this could lead to processes getting stuck for
4165 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4166 process, before it forks any delivery processes. The open lookup caching
4167 mechanism meant that the open file or database connection was passed into
4168 the delivery process. The problem was that delivery processes always tidy
4169 up cached lookup data. This could cause a problem for the next delivery
4170 process started by the queue runner, because the external queue runner
4171 process does not know about the closure. So the next delivery process
4172 still has data in the lookup cache. In the case of a file lookup, there was
4173 no problem because closing a file descriptor in a subprocess doesn't affect
4174 the parent. However, if the lookup was caching a connection to a database,
4175 the connection was closed, and the second delivery process was likely to
4176 see errors such as "PGSQL: query failed: server closed the connection
4177 unexpectedly". The problem has been fixed by closing all cached lookups
4178 in a queue runner before running a delivery process.
4180 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4181 seem to have the "const" qualifier which it has on other OS. I've
4184 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4185 *of the same type* (client or server) with the same public name that an
4186 error should be diagnosed.
4188 9. When Exim looked up a host name for an IP address, but failed to find the
4189 original IP address when looking up the host name (a safety check), it
4190 output the message "<ip address> does not match any IP for NULL", which was
4191 confusing, to say the least. The bug was that the host name should have
4192 appeared instead of "NULL".
4194 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4195 user that is built into the binary, and the -C or -D options is used, root
4196 privilege is dropped before the configuration file is read. In addition,
4197 logging is switched to stderr instead of the normal log files. If the
4198 configuration then re-defines the Exim user, the unprivileged environment
4199 is probably not what is expected, so Exim logs a panic warning message (but
4202 However, if deliver_drop_privilege is set, the unprivileged state may well
4203 be exactly what is intended, so the warning has been cut out in that case,
4204 and Exim is allowed to try to write to its normal log files.
4210 1. smtp_return_error_details was not giving details for temporary sender
4211 or receiver verification errors.
4213 2. Diagnose a configuration error if two authenticators have the same public
4216 3. Exim used not to create the message log file for a message until the first
4217 delivery attempt. This could be confusing when incoming messages were held
4218 for policy or load reasons. The message log file is now created at the time
4219 the message is received, and an initial "Received" line is written to it.
4221 4. The automatically generated man page for command line options had a minor
4222 bug that caused no ill effects; however, a more serious problem was that
4223 the procedure for building the man page automatically didn't always
4224 operate. Consequently, release 4.20 contains an out-of-date version. This
4225 shouldn't happen again.
4227 5. When building Exim with embedded Perl support, the script that builds the
4228 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4229 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4231 6. The freeze_tell option was not being used for messages that were frozen on
4232 arrival, either by an ACL or by local_scan().
4234 7. Added the smtp_incomplete_transaction log selector.
4236 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4237 was accepting AUTH without a new EHLO.
4239 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4240 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4243 10. Logging of TCP/IP connections (when configured) now happens in the main
4244 daemon process instead of the child process, so that the TCP/IP connection
4245 count is more accurate (but it can never be perfect).
4247 11. The use of "drop" in a nested ACL was not being handled correctly in the
4248 outer ACL. Now, if condition failure induced by the nested "drop" causes
4249 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4250 or "require"), the connection is dropped.
4252 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4253 that yield "discard" can now be used with an "accept" or a "discard" verb,
4254 but an error is generated for any others (because I can't see a useful way
4255 to define what should happen).
4257 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4258 are now processed in the same way as lines in the Exim configuration file.
4259 In particular, continuation lines are supported.
4261 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4263 15. Added -ti meaning -t -i.
4265 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4266 domains, and warn by logging if others are found.
4268 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4269 returned from GIFCONF when Exim is trying to find the list of interfaces on
4270 a host. The code in os.c has been modified to copy each ifreq to an aligned
4271 structure in all cases.
4273 Also, in some cases, the returned ifreq's were being copied to a 'struct
4274 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4275 means the last couple of bytes of an IPv6 address could be chopped if the
4276 ifreq contained only a normal sockaddr (14 bytes storage).
4278 18. Named domain lists were not supported in the hosts_treat_as_local option.
4279 An entry such as +xxxx was not recognized, and was treated as a literal
4282 19. Ensure that header lines added by a DATA ACL are included in the reject log
4283 if the ACL subsequently rejects the message.
4285 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4286 MD5 (which is deprecated).
4288 21. When testing a filter file using -bf, Exim was writing a message when it
4289 took the sender from a "From " line in the message, but it was not doing so
4290 when it took $return_path from a Return-Path: header line. It now does.
4292 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4293 with a valid header line field name (a series of printing characters
4294 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4296 23. Changed "disc" in the source to "disk" to conform to the documentation and
4297 the book and for uniformity.
4299 24. Ignore Sendmail's -Ooption=value command line item.
4301 25. When execve() failed while trying to run a command in a pipe transport,
4302 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4303 could be confused with a return value of 69 from the command itself. This
4304 has been changed to 127, the value the shell returns if it is asked to run
4305 a non-existent command. The wording for the related log line suggests a
4306 non-existent command as the problem.
4308 26. If received_header_text expands to an empty string, do not add a Received:
4309 header line to the message. (Well, it adds a token one on the spool, but
4310 marks it "old" so that it doesn't get used or transmitted.)
4312 27. Installed eximstats 1.28 (addition of -nt option).
4314 28. There was no check for failure on the call to getsockname() in the daemon
4315 code. This can fail if there is a shortage of resources on the system, with
4316 ENOMEM, for example. A temporary error is now given on failure.
4318 29. Contrary to the C standard, it seems that in some environments, the
4319 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4320 program. Exim now does this explicitly; it affects the formatting of
4321 timestamps using strftime().
4323 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4324 complaints. I've now initialized all the variables, to avoid this.
4326 32. Header lines added by a system filter were not being "seen" during
4327 transport-time rewrites.
4329 33. The info_callback() function passed to OpenSSL is set up with type void
4330 (*)(SSL *, int, int), as described somewhere. However, when calling the
4331 function (actually a macro) that sets it up, the type void(*)() is
4332 expected. I've put in a cast to prevent warnings from picky compilers.
4334 34. If a DNS black list lookup found a CNAME record, but there were no A
4335 records associated with the domain it pointed at, Exim crashed.
4337 35. If a DNS black list lookup returned more than one A record, Exim ignored
4338 all but the first. It now scans all returned addresses if a particular IP
4339 value is being sought. In this situation, the contents of the
4340 $dnslist_value variable are a list of all the addresses, separated by a
4343 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4344 to accept a host name and all its aliases if the forward lookup for any of
4345 them yielded the IP address of the incoming connection. Now it accepts only
4346 those names whose forward lookup yields the correct IP address. Any other
4347 names are discarded. This closes a loophole whereby a rogue DNS
4348 administrator could create reverse DNS records to break through a
4349 wildcarded host restriction in an ACL.
4351 37. If a user filter or a system filter that ran in a subprocess used any of
4352 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4353 the wrong values were passed to the pipe command ($thisaddress had the
4354 value of $0, $0 had the value of $1, etc). This bug was introduced by
4355 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4357 38. Improved the line breaking for long SMTP error messages from ACLs.
4358 Previously, if there was no break point between 40 and 75 characters, Exim
4359 left the rest of the message alone. Two changes have been made: (a) I've
4360 reduced the minimum length to 35 characters; (b) if it can't find a break
4361 point between 35 and 75 characters, it looks ahead and uses the first one
4362 that it finds. This may give the occasional overlong line, but at least the
4363 remaining text gets split now.
4365 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4366 file descriptors might be low, and that setting 1000 would always raise it.
4367 It turns out that in some environments, the limit is already over 1000 and
4368 that lowering it causes trouble. So now Exim takes care not to decrease it.
4370 40. When delivering a message, the value of $return_path is set to $sender_
4371 address at the start of routing (routers may change the value). By an
4372 oversight, this default was not being set up when an address was tested by
4373 -bt or -bv, which affected the outcome if any router or filter referred to
4376 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4377 log only when "message" or "log_message" are set. However, if one of the
4378 conditions was an address verification, or a call to a nested ACL, the
4379 messages generated by the underlying test were being passed through. This
4380 no longer happens. The underlying message is available in $acl_verify_
4381 message for both "message" and "log_message" expansions, so it can be
4382 passed through if needed.
4384 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4385 new expansion $bh_ to give the encoded byte string without charset
4386 translation. Translation happens only if iconv() is available; HAVE_ICONV
4387 indicates this at build time. HEADERS_CHARSET gives the charset to
4388 translate to; headers_charset can change it in the configuration, and
4389 "headers charset" can change it in an individual filter file.
4391 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4392 that creates RFC 2047 encoded "words" labels them as that charset instead
4393 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4394 expansion operator; (ii) when Exim creates a From: line for a local
4395 message; (iii) when a header line is rewritten to include a "phrase" part.
4397 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4398 buggy, causing it to skip the first lines of messages whose message ID
4399 ended in 'D'. This would not have bitten before Exim release 4.14, because
4400 message IDs were unlikely to end in 'D' before then. The effect was to have
4401 incorrect size information for certain domains.
4403 45. #include "config.h" was missing at the start of the crypt16.c module. This
4404 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4407 46. If there was a timeout during a "random" callout check, Exim treated it as
4408 a failure of the random address, and carried on sending RSET and the real
4409 address. If the delay was just some slowness somewhere, the response to the
4410 original RCPT would be taken as a response to RSET and so on, causing
4411 mayhem of various kinds.
4413 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4414 when I implemented it. It didn't allow for the fact that some option values
4415 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4416 the right test for positive values.
4418 48. Domain names in DNS records are case-independent. Exim always looks them up
4419 in lower case. Some resolvers return domain names in exactly the case they
4420 appear in the zone file, that is, they may contain uppercase letters. Not
4421 all resolvers do this - some return always lower case. Exim was treating a
4422 change of case by a resolver as a change of domain, similar to a widening
4423 of a domain abbreviation. This triggered its re-routing code and so it was
4424 trying to route what was effectively the same domain again. This normally
4425 caused routing to fail (because the router wouldn't handle the domain
4426 twice). Now Exim checks for this case specially, and just changes the
4427 casing of the domain that it ultimately uses when it transmits the message
4430 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4433 50. If a filter generated a file delivery with a non-absolute name (possible if
4434 no home directory exists for the router), the forbid_file option was not
4437 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4438 the existing equality matching.
4440 52. Exim was using ints instead of ino_t variables in some places where it was
4441 dealing with inode numbers.
4443 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4444 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4445 called TMPDIR, and if it finds it is different, it changes its value.
4447 54. The smtp_printf() function is now made available to local_scan() so
4448 additional output lines can be written before returning. There is also an
4449 smtp_fflush() function to enable the detection of a dropped connection.
4450 The variables smtp_input and smtp_batched_input are exported to
4453 55. Changed the default runtime configuration: the message "Unknown user"
4454 has been removed from the ACL, and instead placed on the localuser router,
4455 using the cannot_route_message feature. This means that any verification
4456 failures that generate their own messages won't get overridden. Similarly,
4457 the "Unrouteable address" message that was in the ACL for unverifiable
4458 relay addresses has also been removed.
4460 56. Added hosts_avoid_esmtp to the smtp transport.
4462 57. The exicyclog script was not checking for the esoteric option
4463 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4464 will work only if exicyclog is run under the appropriate euid.
4466 58. Following a discussion on the list, the rules by which Exim recognises line
4467 endings on incoming messages have been changed. The -dropcr and drop_cr
4468 options are now no-ops, retained only for backwards compatibility. The
4469 following line terminators are recognized: LF CRLF CR. However, special
4470 processing applies to CR:
4472 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4473 nor a local message in the state where . is a terminator.
4475 (ii) If a bare CR is encountered in a header line, an extra space is added
4476 after the line terminator so as not to end the header. The reasoning
4477 behind this is that bare CRs in header lines are most likely either
4478 to be mistakes, or people trying to play silly games.
4480 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4481 was being incorrectly given as 18 bytes larger than it should have been.
4482 This is a VOB (very old bug).
4484 60. This may never have affected anything current, but just in case it has:
4485 When the local host is found other than at the start of a list of hosts,
4486 the local host, those with the same MX, and any that follow, are discarded.
4487 When the list in question was part of a longer list of hosts, the following
4488 hosts (not currently being processed) were also being discarded. This no
4489 longer happens. I'm not sure if this situation could ever has previously
4492 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4495 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4496 header. This is something that is recommended in a new Internet Draft, and
4497 is something that is documented as being done by Sendmail. There are two
4498 possible values. For messages generated by the autoreply transport, Exim
4501 Auto-Submitted: auto-replied
4503 whereas for all other generated messages (e.g. bounces) it adds
4505 Auto-Submitted: auto-generated
4507 63. The "personal" condition in filters now includes a test for the
4508 Auto-Submitted: header. If it contains the string "auto-" the message it
4509 not considered personal.
4511 64. Added rcpt_include_affixes as a generic transport option.
4513 65. Added queue_only_override (default true).
4515 66. Added the syslog_duplication option.
4517 67. If what should have been the first header line of a message consisted of
4518 a space followed by a colon, Exim was mis-interpreting it as a header line.
4519 It isn't of course - it is syntactically invalid and should therefore be
4520 treated as the start of the message body. The misbehaviour could have
4521 caused a number of strange effects, including loss of data in subsequent
4522 header lines, and spool format errors.
4524 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4525 client host had authenticated. This control can now be exercised by an ACL
4526 for more flexibility.
4528 69. By default, callouts do not happen when testing with -bh. There is now a
4529 variant, -bhc, which does actually run the callout code, including
4530 consulting and updating the callout cache.
4532 70. Added support for saslauthd authentication, courtesy of Alexander
4535 71. If statvfs() failed on the spool or log directories while checking their
4536 size for availability, Exim confusingly gave the error "space shortage".
4537 Furthermore, in debugging mode it crashed with a floating point exception.
4538 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4539 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4540 serious problem, Exim now writes to the main and panic logs when this
4541 happens, with details of the failure. It then refuses to accept the
4542 incoming message, giving the message "spool directory problem" or "log
4543 directory problem" with a 421 code for SMTP messages.
4545 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4546 0, 1, and 2 exist, because some OS complain for execs without them (see
4547 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4548 descriptors. However, the code omitted to check that the open succeeded,
4549 causing mysterious errors if for some reason the permissions on /dev/null
4550 got screwed. Now Exim writes a message to the main and panic logs, and
4551 bombs out if it can't open /dev/null.
4553 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4554 interact so that it is all more flexible. It is supposed to remain
4555 backwards compatible. Also added extra_local_interfaces.
4557 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4558 to bomb out with an assertion failure - to the client this appears as a
4559 connection drop. This problem occurs in the part of the code that was taken
4560 from the Samba project. Fortunately, the assertion is in a very simple
4561 function, so I have fixed this by reproducing the function inline in the
4562 one place where it is called, and arranging for authentication to fail
4563 instead of killing the process with assert().
4565 75. The SPA client code was not working when the server requested OEM rather
4566 than Unicode encoding.
4568 76. Added code to make require_files with a specific uid setting more usable in
4569 the case where statting the file as root fails - usually a non-root-mounted
4570 NFS file system. When this happens and the failure is EACCES, Exim now
4571 forks a subprocess and does the per-uid checking as the relevant uid.
4573 77. Added process_log_path.
4575 78. If log_file_path was not explicitly set, a setting of check_log_space or
4576 check_log_inodes was ignored.
4578 79. If a space check for the spool or log partitions fails, the incident is now
4579 logged. Of course, in the latter case the data may get lost...
4581 80. Added the %p formatting code to string_format() so that it can be used to
4582 print addresses in debug_print(). Adjusted all the address printing in the
4583 debugging in store.c to use %p rather than %d.
4585 81. There was a concern that a line of code in smtp_in.c could overflow a
4586 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4587 initially expressed, the concern was not well-founded, because trailing
4588 spaces are removed early. However, if the trailing spaces were followed by
4589 a NULL, they did not get removed, so the overflow was possible. Two fixes
4592 (a) I re-wrote the offending code in a cleaner fashion.
4593 (b) If an incoming SMTP command contains a NULL character, it is rejected
4596 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4597 runs initgroups(), so that if the Exim user is in any additional groups,
4598 they will be used during message reception.
4604 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob