1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.515 2007/06/19 14:41:31 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Another patch from the Sieve maintainer.
11 PH/02 When an IPv6 address is converted to a string for single-key lookup
12 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
13 dots are used instead of colons so that keys in lsearch files need not
14 contain colons. This was done some time before quoting was made available
15 in lsearch files. However, iplsearch files do require colons in IPv6 keys
16 (notated using the quote facility) so as to distinguish them from IPv4
17 keys. This meant that lookups for IP addresses in host lists did not work
18 for iplsearch lookups.
20 This has been fixed by arranging for IPv6 addresses to be expressed with
21 colons if the lookup type is iplsearch. This is not incompatible, because
22 previously such lookups could never work.
24 The situation is now rather anomolous, since one *can* have colons in
25 ordinary lsearch keys. However, making the change in all cases is
26 incompatible and would probably break a number of configurations.
28 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
31 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
32 conversion specification without a maximum field width, thereby enabling
33 a rogue spamd server to cause a buffer overflow. While nobody in their
34 right mind would setup Exim to query an untrusted spamd server, an
35 attacker that gains access to a server running spamd could potentially
36 exploit this vulnerability to run arbitrary code as the Exim user.
38 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
39 $primary_hostname instead of what libspf2 thinks the hosts name is.
41 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
42 a directory entry by the name of the lookup key. Previously, if a
43 symlink pointed to a non-existing file or a file in a directory that
44 Exim lacked permissions to read, a lookup for a key matching that
45 symlink would fail. Now it is enough that a matching directory entry
46 exists, symlink or not. (Bugzilla 503.)
48 PH/03 The body_linecount and body_zerocount variables are now exported in the
51 PH/04 Added the $dnslist_matched variable.
53 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
54 This means they are set thereafter only if the connection becomes
57 PH/06 Added the client_condition to authenticators so that some can be skipped
58 by clients under certain conditions.
60 PH/07 The error message for a badly-placed control=no_multiline_responses left
61 "_responses" off the end of the name.
63 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
69 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
70 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
73 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
76 PH/02 In an ACL statement such as
78 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
80 if a client was not listed at all, or was listed with a value other than
81 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
82 the condition was not true (as it should be), so access was not denied.
83 The bug was that the ! inversion was incorrectly passed on to the second
84 item. This has been fixed.
86 PH/03 Added additional dnslists conditions == and =& which are different from
87 = and & when the dns lookup returns more than one IP address.
89 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
90 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
92 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
93 FSYNC, which compiles an option called disable_fsync that allows for
94 bypassing fsync(). The documentation is heavily laced with warnings.
96 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
98 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
99 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
100 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
101 including adding "make clean"; (3) Added -fPIC when compiling the test
102 dynamically loaded module, to get rid of a warning.
104 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
105 message fails, move_frozen_messages = true and ignore_bounce_errors_after
106 = 0s. The bug is otherwise harmless.
108 PH/07 There was a bug in the dovecot authenticator such that the value of
109 $auth1 could be overwritten, and so not correctly preserved, after a
110 successful authentication. This usually meant that the value preserved by
111 the server_setid option was incorrect.
113 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
115 PH/09 Installed PCRE release 7.0.
117 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
118 run for batched SMTP input. It is now run at the start of every message
119 in the batch. While fixing this I discovered that the process information
120 (output by running exiwhat) was not always getting set for -bs and -bS
121 input. This is fixed, and it now also says "batched" for BSMTP.
123 PH/11 Added control=no_pipelining.
125 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
126 patch, slightly modified), and move the expansion of helo_data till after
127 the connection is made in the smtp transport (so it can use these
130 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
132 PH/14 Added log_selector = +pid.
134 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
136 PH/16 Add ${if forany and ${if forall.
138 PH/17 Added dsn_from option to vary the From: line in DSNs.
140 PH/18 Flush SMTP output before performing a callout, unless control =
141 no_callout_flush is set.
143 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
144 was true (the default) a successful delivery failed to delete the retry
145 item, thus causing premature timeout of the address. The bug is now
148 PH/20 Added hosts_avoid_pipelining to the smtp transport.
150 PH/21 Long custom messages for fakedefer and fakereject are now split up
151 into multiline reponses in the same way that messages for "deny" and
152 other ACL rejections are.
154 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
155 with slight modification.
157 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
158 draft, changing the syntax and factoring some duplicate code".
160 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
161 for deliveries of the second and subsequent messages over the same SMTP
164 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
165 ${reduce, with only minor "tidies".
167 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
169 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
170 expansion side effects.
172 PH/27 When a message times out after an over-quota error from an Exim-imposed
173 quota, the bounce message says "mailbox is full". This message was not
174 being given when it was a system quota that was exceeded. It now should
177 MH/03 Made $recipients available in local_scan(). local_scan() already has
178 better access to the recipient list through recipients_list[], but
179 $recipients can be useful in postmaster-provided expansion strings.
181 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
182 in the case of a MAIL command with additional options following the
183 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
184 were accidentally chopped off.
186 PH/29 SMTP synchronization checks are implemented when a command is read -
187 there is a check that no more input is waiting when there shouldn't be
188 any. However, for some commands, a delay in an ACL can mean that it is
189 some time before the response is written. In this time, more input might
190 arrive, invalidly. So now there are extra checks after an ACL has run for
191 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
192 pipelining has not been advertised.
194 PH/30 MH's patch to allow iscntrl() characters to be list separators.
196 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
197 returned in the SMTP response when smtp_return_error_details was false.
200 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
201 instead of the C I/O that was originally supplied, because problems were
204 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
205 Exim which did not show up earlier: it was assuming that a call to
206 SSL_CTX_set_info_callback() might give an error value. In fact, there is
207 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
208 was a macro that became an assignment, so it seemed to work. This has
209 changed to a proper function call with a void return, hence the compile
210 error. Exim's code has been fixed.
212 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
215 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
217 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
219 PH/37 If a message is not accepted after it has had an id assigned (e.g.
220 because it turns out to be too big or there is a timeout) there is no
221 "Completed" line in the log. When some messages of this type were
222 selected by exigrep, they were listed as "not completed". Others were
223 picked up by some special patterns. I have improved the selection
224 criteria to be more general.
226 PH/38 The host_find_failed option in the manualroute router can now be set
227 to "ignore", to completely ignore a host whose IP address cannot be
228 found. If all hosts are ignored, the behaviour is controlled by the new
229 host_all_ignored option.
231 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
232 homing or because of multiple MX records with /mx) generated more than
233 one IP address, and the following item turned out to be the local host,
234 all the secondary addresses of the first item were incorrectly removed
235 from the list, along with the local host and any following hosts (which
236 is what is supposed to happen).
238 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
239 whoever called Exim into the -H file. In the case of the daemon it was
240 behaving confusingly. When first started, it used values for whoever
241 started the daemon, but after a SIGHUP it used the Exim user (because it
242 calls itself on a restart). I have changed the code so that it now always
245 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
246 message are rejected with the same error (e.g. no authentication or bad
247 sender address), and a DATA command is nevertheless sent (as can happen
248 with PIPELINING or a stupid MUA), the error message that was given to the
249 RCPT commands is included in the rejection of the DATA command. This is
250 intended to be helpful for MUAs that show only the final error to their
253 PH/42 Another patch from the Sieve maintainer.
255 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
256 Eximstats - Fixed some broken HTML links and added missing column headers
258 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
259 columns for Rejects, Temp Rejects, Ham, and Spam rows.
261 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
263 PH/43 Yet another patch from the Sieve maintainer.
265 PH/44 I found a way to check for a TCP/IP connection going away before sending
266 the response to the final '.' that terminates a message, but only in the
267 case where the client has not sent further data following the '.'
268 (unfortunately, this is allowed). However, in many cases there won't be
269 any further data because there won't be any more messages to send. A call
270 to select() can be used: if it shows that the input is "ready", there is
271 either input waiting, or the socket has been closed. An attempt to read
272 the next input character can distinguish the two cases. Previously, Exim
273 would have sent an OK response which the client would never have see.
274 This could lead to message repetition. This fix should cure that, at
275 least in a lot of common cases.
277 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
278 advertised in response to EHLO.
284 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
285 fixed by 4.65/MH/01 (is this a record?) are fixed:
287 (i) An empty string was always treated as zero by the numeric comparison
288 operators. This behaviour has been restored.
290 (ii) It is documented that the numeric comparison operators always treat
291 their arguments as decimal numbers. This was broken in that numbers
292 starting with 0 were being interpreted as octal.
294 While fixing these problems I realized that there was another issue that
295 hadn't been noticed. Values of message_size_limit (both the global option
296 and the transport option) were treated as octal if they started with 0.
297 The documentation was vague. These values are now always treated as
298 decimal, and I will make that clear in the documentation.
304 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
305 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
308 MH/01 Don't check that the operands of numeric comparison operators are
309 integers when their expansion is in "skipping" mode (fixes bug
310 introduced by 4.64-PH/07).
312 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
313 child addresses, Exim now panics and dies. Previously, because the count
314 is held in a short int, deliveries were likely to be lost. As such a
315 large number of recipients for a single message is ridiculous
316 (performance will be very, very poor), I have chosen to impose a limit
317 rather than extend the field.
323 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
324 leftover -K file (the existence of which was triggered by #402).
325 While we were at it, introduced process PID as part of the -K
326 filename. This should rule out race conditions when creating
329 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
330 processing considerably. Previous code took too long for large mails,
331 triggering a timeout which in turn triggers #401.
333 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
334 in the DK code in transports.c. sendfile() is not really portable,
335 hence the _LINUX specificness.
337 TF/01 In the add_headers option to the mail command in an Exim filter,
338 there was a bug that Exim would claim a syntax error in any
339 header after the first one which had an odd number of characters
342 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
343 callout verification, Exim cached a "reject" for the entire domain. This
344 is correct for most verifications, but it is not correct for a recipient
345 verification with use_sender or use_postmaster set, because in that case
346 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
347 case of MAIL FROM:<> rejection from other early rejections (e.g.
348 rejection of HELO). When verifying a recipient using a non-null MAIL
349 address, the cache is ignored if it shows MAIL FROM:<> rejection.
350 Whatever the result of the callout, the value of the domain cache is
351 left unchanged (for any other kind of callout, getting as far as trying
352 RCPT means that the domain itself is ok).
354 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
357 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
358 manifest itself as EPIPE rather than ECONNECT. When tidying away a
359 session, the daemon ignores ECONNECT errors and logs others; it now
360 ignores EPIPE as well.
362 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
363 (quoted-printable decoding).
365 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
366 later the small subsequent patch to fix an introduced bug.
368 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
370 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
372 PH/08 An error is now given if message_size_limit is specified negative.
374 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
375 to be given (somewhat) arbitrary names.
377 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
380 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
381 miscellaneous code fixes
383 PH/10 Added the log_reject_target ACL modifier to specify where to log
386 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
387 hostname. This is wrong, because it relates to the incoming message (and
388 probably the interface on which it is arriving) and not to the outgoing
389 callout (which could be using a different interface). This has been
390 changed to use the value of the helo_data option from the smtp transport
391 instead - this is what is used when a message is actually being sent. If
392 there is no remote transport (possible with a router that sets up host
393 addresses), $smtp_active_hostname is used.
395 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
396 tweaks were necessary in order to get it to work (see also 21 below):
397 (a) The code assumed that strncpy() returns a negative number on buffer
398 overflow, which isn't the case. Replaced with Exim's string_format()
400 (b) There were several signed/unsigned issues. I just did the minimum
401 hacking in of casts. There is scope for a larger refactoring.
402 (c) The code used strcasecmp() which is not a standard C function.
403 Replaced with Exim's strcmpic() function.
404 (d) The code set only $1; it now sets $auth1 as well.
405 (e) A simple test gave the error "authentication client didn't specify
406 service in request". It would seem that Dovecot has changed its
407 interface. Fortunately there's a specification; I followed it and
408 changed what the client sends and it appears to be working now.
410 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
413 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
414 address A is aliased to B and C, where B exists and C does not. Without
415 -v the output is "A verified" because verification stops after a
416 successful redirection if more than one address is generated. However,
417 with -v the child addresses are also verified. Exim was outputting "A
418 failed to verify" and then showing the successful verification for C,
419 with its parentage. It now outputs "B failed to verify", showing B's
420 parentage before showing the successful verification of C.
422 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
423 look up a TXT record in a specific list after matching in a combined
426 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
427 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
428 they consult the DNS. I had assumed they would set it the way they
429 wanted; and indeed my experiments on Linux seem to show that in some
430 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
431 To be on the safe side, however, I have now made the interface to
432 host_find_byname() similar to host_find_bydns(), with an argument
433 containing the DNS resolver options. The host_find_byname() function now
434 sets these options at its start, just as host_find_bydns() does. The smtp
435 transport options dns_qualify_single and dns_search_parents are passed to
436 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
437 of host_find_byname() use the default settings of RES_DEFNAMES
438 (qualify_single) but not RES_DNSRCH (search_parents).
440 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
441 spool_read_header() do less string testing, by means of a preliminary
442 switch on the second character of optional "-foo" lines. (This is
443 overdue, caused by the large number of possibilities that now exist.
444 Originally there were few.) While I was there, I also converted the
445 str(n)cmp tests so they don't re-test the leading "-" and the first
446 character, in the hope this might squeeze out yet more improvement.
448 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
449 flag allowing group syntax was set by the header_syntax check but not
450 turned off, possible causing trouble later; (2) The flag was not being
451 set at all for the header_verify test, causing "group"-style headers to
452 be rejected. I have now set it in this case, and also caused header_
453 verify to ignore an empty address taken from a group. While doing this, I
454 came across some other cases where the code for allowing group syntax
455 while scanning a header line wasn't quite right (mostly, not resetting
456 the flag correctly in the right place). These bugs could have caused
457 trouble for malformed header lines. I hope it is now all correct.
459 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
460 with the "reply" argument non-NULL. The code, however (which originally
461 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
462 but it didn't always do it. This confused somebody who was copying the
463 code for some other use. I have removed all the tests.
465 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
466 feature that was used to support insecure browsers during the U.S. crypto
467 embargo. It requires special client support, and Exim is probably the
468 only MTA that supported it -- and would never use it because real RSA is
469 always available. This code has been removed, because it had the bad
470 effect of slowing Exim down by computing (never used) parameters for the
471 RSA_EXPORT functionality.
473 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
474 authenticator to fail if there's a tab character in the incoming data
475 (there should never be unless someone is messing about, as it's supposed
476 to be base64-encoded). Also added, on Timo's advice, the "secured" option
477 if the connection is using TLS or if the remote IP is the same as the
478 local IP, and the "valid-client-cert option" if a client certificate has
481 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
482 authenticators. This can be used for authorization after authentication
483 succeeds. (In the case of plaintext, it servers for both authentication
486 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
487 if any retry times were supplied.
489 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
490 connection, where there is no client IP address to check. In this
491 situation, the verify now always succeeds.
493 PH/25 Applied John Jetmore's -Mset patch.
495 PH/26 Added -bem to be like -Mset, but loading a message from a file.
497 PH/27 In a string expansion for a processed (not raw) header when multiple
498 headers of the same name were present, leading whitespace was being
499 removed from all of them, but trailing whitespace was being removed only
500 from the last one. Now trailing whitespace is removed from each header
501 before concatenation. Completely empty headers in a concatenation (as
504 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
505 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
507 PH/29 [Removed. This was a change that I later backed out, and forgot to
508 correct the ChangeLog entry (that I had efficiently created) before
509 committing the later change.]
511 PH/30 Exim was sometimes attempting to deliver messages that had suffered
512 address errors (4xx response to RCPT) over the same connection as other
513 messages routed to the same hosts. Such deliveries are always "forced",
514 so retry times are not inspected. This resulted in far too many retries
515 for the affected addresses. The effect occurred only when there were more
516 hosts than the hosts_max_try setting in the smtp transport when it had
517 the 4xx errors. Those hosts that it had tried were not added to the list
518 of hosts for which the message was waiting, so if all were tried, there
519 was no problem. Two fixes have been applied:
521 (i) If there are any address or message errors in an SMTP delivery, none
522 of the hosts (tried or untried) are now added to the list of hosts
523 for which the message is waiting, so the message should not be a
524 candidate for sending over the same connection that was used for a
525 successful delivery of some other message. This seems entirely
526 reasonable: after all the message is NOT "waiting for some host".
527 This is so "obvious" that I'm not sure why it wasn't done
528 previously. Hope I haven't missed anything, but it can't do any
529 harm, as the worst effect is to miss an optimization.
531 (ii) If, despite (i), such a delivery is accidentally attempted, the
532 routing retry time is respected, so at least it doesn't keep
533 hammering the server.
535 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
536 in ${readsocket because some servers need this prod.
538 PH/32 Added some extra debug output when updating a wait-xxx database.
540 PH/33 The hint "could be header name not terminated by colon", which has been
541 given for certain expansion errors for a long time, was not being given
542 for the ${if def:h_colon_omitted{... case.
544 PH/34 The spec says: "With one important exception, whenever a domain list is
545 being scanned, $domain contains the subject domain." There was at least
546 one case where this was not true.
548 PH/35 The error "getsockname() failed: connection reset by peer" was being
549 written to the panic log as well as the main log, but it isn't really
550 panic-worthy as it just means the connection died rather early on. I have
551 removed the panic log writing for the ECONNRESET error when getsockname()
554 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
555 runs only) independently of the message's sender address. This meant
556 that, if the 4xx error was in fact related to the sender, a different
557 message to the same recipient with a different sender could confuse
558 things. In particualar, this can happen when sending to a greylisting
559 server, but other circumstances could also provoke similar problems.
560 I have changed the default so that the retry time for these errors is now
561 based a combination of the sender and recipient addresses. This change
562 can be overridden by setting address_retry_include_sender=false in the
565 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
566 remote server are returned as part of bounce messages. This was not
567 happening for LMTP over a pipe (the lmtp transport), but now it is the
568 same for both kinds of LMTP.
570 PH/38 Despite being documented as not happening, Exim was rewriting addresses
571 in header lines that were in fact CNAMEs. This is no longer the case.
573 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
574 and queue runs started by the daemon processed all messages. This has
575 been fixed so that -R and -S can now usefully be given with -q<time>.
577 PH/40 Import PCRE release 6.7 (fixes some bugs).
579 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
581 PH/42 Give an error if -q is specified more than once.
583 PH/43 Renamed the variables $interface_address and $interface_port as
584 $received_ip_address and $received_port, to make it clear that these
585 values apply to message reception, and not to the outgoing interface when
586 a message is delivered. (The old names remain recognized, of course.)
588 PH/44 There was no timeout on the connect() call when using a Unix domain
589 socket in the ${readsocket expansion. There now is.
591 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
592 be meaningful with "accept".
594 SC/01 Eximstats V1.43
595 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
597 SC/02 Eximstats V1.44
598 Use a glob alias rather than an array ref in the generated
599 parser. This improves both readability and performance.
601 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
602 Collect SpamAssassin and rejection statistics.
603 Don't display local sender or destination tables unless
604 there is data to show.
605 Added average volumes into the top table text output.
607 SC/04 Eximstats V1.46
608 Collect data on the number of addresses (recipients)
609 as well as the number of messages.
611 SC/05 Eximstats V1.47
612 Added 'Message too big' to the list of mail rejection
613 reasons (thanks to Marco Gaiarin).
615 SC/06 Eximstats V1.48
616 Mainlog lines which have GMT offsets and are too short to
617 have a flag are now skipped.
619 SC/07 Eximstats V1.49 (Alain Williams)
620 Added the -emptyok flag.
622 SC/08 Eximstats V1.50
623 Fixes for obtaining the IP address from reject messages.
625 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
626 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
627 whitesspace changes from 4.64-PH/27
629 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
632 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
633 are found, allow negative numbers in numeric criteria)
635 JJ/06 exipick.20061117.2, added new $message_body_missing variable
637 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
638 to match changes made in 4.64-PH/43
640 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
642 PH/47 Put in an explicit test for a DNS lookup of an address record where the
643 "domain" is actually an IP address, and force a failure. This locks out
644 those revolvers/nameservers that support "A-for-A" lookups, in
645 contravention of the specifications.
647 PH/48 When a host name was looked up from an IP address, and the subsequent
648 forward lookup of the name timed out, the host name was left in
649 $sender_host_name, contrary to the specification.
651 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
652 restricted to single-key lookups, Exim was not diagnosing an error if
653 * or *@ was used with a query-style lookup.
655 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
657 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
658 long ago, but noone interested enough thought of it. Let's just say that
659 the "1.1" means that there are some new functions that weren't there at
660 some point in the past.
662 PH/51 Error processing for expansion failure of helo_data from an smtp
663 transport during callout processing was broken.
665 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
666 tested/used via the -bh/-bhc/-bs options.
668 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
669 bug, fixed in subsequent PCRE releases).
671 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
672 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
674 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
680 SC/01 Use a glob alias rather than an array ref in eximstats generated
681 parser. This improves both readability and performance.
683 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
684 Don't display local sender or destination tables in eximstats unless
685 there is data to show.
686 Added average volumes into the eximstats top table text output.
688 SC/03 Collect data on the number of addresses (recipients) as well
689 as the number of messages in eximstats.
691 TF/01 Correct an error in the documentation for the redirect router. Exim
692 does (usually) call initgroups() when daemonizing.
694 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
695 with consistent privilege compared to when running as a daemon.
697 TF/03 Note in the spec that $authenticated_id is not set for local
698 submissions from trusted users.
700 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
701 Thanks to Dean Brooks <dean@iglou.com> for the patch.
703 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
704 by adding some example configuration directives to the default
705 configuration file. A little bit of work is required to uncomment the
706 directives and define how usernames and passwords are checked, but
707 there is now a framework to start from.
709 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
710 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
711 without this. I don't know how relevant this is to other LDAP libraries.
713 PH/02 Add the verb name to the "unknown ACL verb" error.
715 PH/03 Magnus Holmgren's patch for filter_prepend_home.
717 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
719 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
720 directory not expanded when it should be if an expanded home directory
721 was set for the address (which is overridden by the transport).
723 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
726 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
727 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
728 because it is too late at that time, and has no effect.
730 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
731 security issue with \' (bugzilla #107). I could not use the
732 PQescapeStringConn() function, because it needs a PGconn value as one of
735 PH/08 When testing addresses using -bt, indicate those final addresses that
736 are duplicates that would not cause an additional delivery. At least one
737 person was confused, thinking that -bt output corresponded to deliveries.
738 (Suppressing duplicates isn't a good idea as you lose the information
739 about possibly different redirections that led to the duplicates.)
741 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
742 systems where poll() doesn't work, in particular OS X.
744 PH/10 Added more information to debugging output for retry time not reached.
746 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
747 operations in malware.c.
749 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
752 PH/13 If write_rejectlog was set false when logging was sent to syslog with
753 syslog_duplication set false, log lines that would normally be written
754 both the the main log and to the reject log were not written to syslog at
757 PH/14 In the default configuration, change the use of "message" in ACL warn
758 statements to "add_header".
760 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
761 not followed by a command (e.g. "seen endif").
763 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
764 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
767 PH/17 Added extra conditions to the default value of delay_warning_condition
771 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
772 { match{$h_precedence:}{(?i)bulk|list|junk} } \
773 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
776 The Auto-Submitted: and various List- headers are standardised, whereas I
777 don't think Precedence: ever was.
779 PH/18 Refactored debugging code in route_finduser() to show more information,
780 in particular, the error code if getpwnam() issues one.
782 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
783 This is apparently needed in addition to the PH/07 change above to avoid
784 any possible encoding problems.
786 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
787 but not after initializing Perl.
789 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
790 output them only if debugging. By default they are written stderr,
791 apparently, which is not desirable.
793 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
796 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
799 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
801 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
802 authenticated or an ident call has been made. Suppress the default
803 values for $authenticated_id and $authenticated_sender (but permit -oMai
804 and -oMas) when testing with -bh.
806 PH/24 Re-jigged the order of the tests in the default configuration so that the
807 tests for valid domains and recipients precede the DNS black list and CSA
808 tests, on the grounds that those ones are more expensive.
810 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
811 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
812 This bug exists in every version of Exim that I still have, right back to
815 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
816 However, an attempt to turn on case-sensitivity in a regex key by
817 including (?-i) didn't work because the subject string was already
818 lowercased, and the effects were non-intuitive. It turns out that a
819 one-line patch can be used to allow (?-i) to work as expected.
825 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
826 other effects) broke the use of negated acl sub-conditions.
828 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
831 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
832 "Deny" causes Exim to reject the incoming connection with a 554 error.
833 Unfortunately, if there is a major crisis, such as a disk failure,
834 tcp-wrappers gives "deny", whereas what one would like would be some
835 kind of temporary error. A kludge has been added to help with this.
836 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
837 554 error is used if errno is still zero or contains ENOENT (which occurs
838 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
841 PH/03 Add -lutil to the default FreeBSD LIBS setting.
843 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
844 errors. Otherwise a message that provokes a temporary error (when other
845 messages do not) can cause a whole host to time out.
847 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
848 addresses were routed directly to files or pipes from a redirect router.
849 File deliveries just didn't batch; pipe deliveries might have suffered
852 PH/06 A failure to get a lock for a hints database would erroneously always say
853 "Failed to get write lock", even when it was really a read lock.
855 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
856 of 0600. This has been changed to use the value of the lockfile_mode
857 option (which defaults to 0600).
859 PH/08 Applied small patch from the Sieve maintainer.
861 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
862 folder from quota calculations, a direct delivery into this folder messed
863 up the contents of the maildirsize file. This was because the regex was
864 used only to exclude .Trash (or whatever) when the size of the mailbox
865 was calculated. There was no check that a delivery was happening into an
866 excluded directory. This bug has been fixed by ignoring all quota
867 processing for deliveries into excluded directories.
869 PH/10 Added the maildirfolder_create_regex option to appendfile.
875 PH/01 The code for finding all the local interface addresses on a FreeBSD
876 system running IPv6 was broken. This may well have applied to all BSD
877 systems, as well as to others that have similar system calls. The broken
878 code found IPv4 interfaces correctly, but gave incorrect values for the
879 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
880 that it would not match correctly against @[] and not recognize the IPv6
883 PH/02 The ipliteral router was not recognizing addresses of the form user@
884 [ipv6:....] because it didn't know about the "ipv6:" prefix.
886 PH/03 Added disable_ipv6.
888 PH/04 Changed $reply_address to use the raw form of the headers instead of the
889 decoded form, because it is most often used to construct To: headers
890 lines in autoreplies, and the decoded form may well be syntactically
891 invalid. However, $reply_address has leading white space removed, and all
892 newlines turned into spaces so that the autoreply transport does not
895 PH/05 If group was specified without a user on a router, and no group or user
896 was specified on a transport, the group from the router was ignored.
898 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
899 for visible compile-time settings that can be used to change these
900 numbers, for those that want even more. Backwards compatibility with old
901 spool files has been maintained. However, going back to a previous Exim
902 release will lost any variables that are in spool files.
904 PH/07 Two small changes when running in the test harness: increase delay when
905 passing a TCP/IP connection to a new process, in case the original
906 process has to generate a bounce, and remove special handling of
907 127.0.0.2 (sic), which is no longer necessary.
909 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
910 be the same on different OS.
912 PH/09 Moved a debug statement in filter processing to avoid a race problem when
915 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
916 whether --show-vars was specified or not
918 JJ/02 exipick: Added support for new ACL variable spool format introduced
921 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
922 syntactically invalid From: or Reply-to: line, and a filter used this to
923 generate an autoreply, and therefore failed to obtain an address for the
924 autoreply, Exim could try to deliver to a non-existent relative file
925 name, causing unrelated and misleading errors. What now happens is that
926 it logs this as a hard delivery error, but does not attempt to create a
929 PH/11 The exinext utility has a -C option for testing purposes, but although
930 the given file was scanned by exinext itself; it wasn't being passed on
931 when Exim was called.
933 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
934 an end-of-file indication when reading a command response.
936 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
937 compiled. In many other places in Exim, IPv6 addresses are always
938 recognized, so I have changed this. It also means that IPv4 domain
939 literals of the form [IPV4:n.n.n.n] are now always recognized.
941 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
942 used if the router is not running as root, for example, when verifying at
943 ACL time, or when using -bh. The debugging output from this situation was
944 non-existent - all you got was a failure to exec. I have made two
947 (a) Failures to set uid/gid, the current directory, or a process leader
948 in a subprocess such as that created by queryprogram now generate
949 suitable debugging ouput when -d is set.
951 (b) The queryprogram router detects when it is not running as root,
952 outputs suitable debugging information if -d is set, and then runs
953 the subprocess without attempting to change uid/gid.
955 PH/15 Minor change to Makefile for building test_host (undocumented testing
958 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
959 additional section of a DNS packet that returns MX or SRV records.
960 Instead, it always explicitly searches for A/AAAA records. This avoids
961 major problems that occur when a DNS server includes only records of one
962 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
963 fixed another bug: if SRV records were looked up and the corresponding
964 address records were *not* found in the additional section, the port
965 values from the SRV records were lost.
967 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
968 using the correct key (the original address) when searching the retry
969 rules in order to find which one to use for generating the retry hint.
971 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
972 adding the default one. Similarly, if it contains a Reply-To: header, the
973 errors_reply_to option, if set, is not used.
975 PH/19 When calculating a retry time, Exim used to measure the "time since
976 failure" by looking at the "first failed" field in the retry record. Now
977 it does not use this if it is later than than the arrival time of the
978 message. Instead it uses the arrival time. This makes for better
979 behaviour in cases where some deliveries succeed, thus re-setting the
980 "first failed" field. An example is a quota failure for a huge message
981 when small messages continue to be delivered. Without this change, the
982 "time since failure" will always be short, possible causing more frequent
983 delivery attempts for the huge message than are intended.
984 [Note: This change was subsequently modified - see PH/04 for 4.62.]
986 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
987 $1, $2, $3) because the numerical variables can be reset during some
988 expansion items (e.g. "match"), thereby losing the authentication data.
990 PH/21 Make -bV show the size of off_t variables so that the test suite can
991 decide whether to run tests for quotas > 2G.
993 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
994 mailbox_size, and mailbox_filecount in the appendfile transport. If a
995 filecount value is greater than 2G or if a quota value is greater than 2G
996 on a system where the size of off_t is not greater than 4, a panic error
999 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1000 never match. The debug and -bh output now contains an explicit error
1001 message indicating a malformed IPv4 address or mask.
1003 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1004 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1005 PH/23 above applies.
1007 PH/25 Do not write to syslog when running in the test harness. The only
1008 occasion when this arises is a failure to open the main or panic logs
1009 (for which there is an explicit test).
1011 PH/26 Added the /no_tell option to "control=freeze".
1013 PH/27 If a host name lookup failed very early in a connection, for example, if
1014 the IP address matched host_lookup and the reverse lookup yielded a name
1015 that did not have a forward lookup, an error message of the form "no IP
1016 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1017 could be logged. Now it outputs the IP address instead of "NULL".
1019 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1020 allows the sender and the authenticated sender to be set when
1021 submitting a message from within Exim. Since child_open_exim() is
1022 documented for local_scan(), the new function should be too.
1024 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1025 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1026 results in an empty string is now treated as unset.
1028 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1030 PH/31 Added sender_verify_fail logging option.
1032 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1033 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1034 tidied the source and removed it altogether.
1036 PH/33 When a queue run was abandoned because the load average was too high, a
1037 log line was always written; now it is written only if the queue_run log
1038 selector is set. In addition, the log line for abandonment now contains
1039 information about the queue run such as the pid. This is always present
1040 in "start" and "stop" lines but was omitted from the "abandon" line.
1042 PH/34 Omit spaces between a header name and the colon in the error message that
1043 is given when verify = headers_syntax fails (if there are lots of them,
1044 the message gets confusing).
1046 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1047 names, as there are now some PTR records that contain slashes. This check
1048 is only to protect against broken name servers that fall over on strange
1049 characters, so the fact that it applies to all lookups doesn't matter.
1051 PH/36 Now that the new test suite is complete, we can remove some of the
1052 special code in Exim that was needed for the old test suite. For example,
1053 sorting DNS records because real resolvers return them in an arbitrary
1054 order. The new test suite's fake resolver always returns records in the
1057 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1058 bounces) except when queue_only is set, to avoid logging races between
1059 the different processes.
1061 PH/38 Panic-die if .include specifies a non-absolute path.
1063 PH/39 A tweak to the "H" retry rule from its user.
1065 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1066 a label. They prevented compilation on older perls.
1068 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1069 a warning to be raised on newish perls.
1071 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1072 on queue. Changes to match documented behaviour of showing count of
1073 messages matching specified criteria.
1075 PH/40 Changed the default ident timeout from 30s to 5s.
1077 PH/41 Added support for the use of login_cap features, on those BSD systems
1078 that have them, for controlling the resources used by pipe deliveries.
1080 PH/42 The content-scanning code uses fopen() to create files in which to put
1081 message data. Previously it was not paying any attention to the mode of
1082 the files. Exim runs with umask(0) because the rest of the code creates
1083 files with open(), and sets the required mode explicitly. Thus, these
1084 files were ending up world-writeable. This was not a big issue, because,
1085 being within the spool directory, they were not world-accessible. I have
1086 created a function called modefopen, which takes an additional mode
1087 argument. It sets umask(777), creates the file, chmods it to the required
1088 mode, then resets the umask. All the relevant calls to fopen() in the
1089 content scanning code have been changed to use this function.
1091 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1092 to 24 hours. This avoids potential overflow problems when processing G
1093 and H retry rules. I suspect nobody ever tinkers with this value.
1095 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1097 PH/45 When the plaintext authenticator is running as a client, the server's
1098 challenges are checked to ensure they are valid base64 strings. By
1099 default, the authentication attempt is cancelled if an invalid string is
1100 received. Setting client_ignore_invalid_base64 true ignores these errors.
1101 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1102 they are received. Thus, the responses can be made to depend on the
1103 challenges. If an invalid string is ignored, an empty string is placed in
1106 PH/46 Messages that are created by the autoreply transport now contains a
1107 References: header, in accordance with RFCs 2822 and 3834.
1109 PH/47 Added authenticated_sender_force to the smtp transport.
1111 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1113 PH/49 Installed latest patch from the Sieve maintainer.
1115 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1116 was also set, the appendfile transport was unnecessarily scanning a
1117 directory of message files (e.g. for maildir delivery) to find the count
1118 of files (along with the size), even though it did not need this
1119 information. It now does the scan only if it needs to find either the
1120 size of the count of files.
1122 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1124 PH/52 Two bugs concerned with error handling when the smtp transport is
1127 (i) Exim was not creating retry information for temporary errors given
1128 for individual recipients after the DATA command when the smtp transport
1129 was used in LMTP mode. This meant that they could be retried too
1130 frequently, and not timed out correctly.
1132 (ii) Exim was setting the flag that allows error details to be returned
1133 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1134 recipients that were returned after the DATA command.
1136 PH/53 This is related to PH/52, but is more general: for any failing address,
1137 when detailed error information was permitted to be returned to the
1138 sender, but the error was temporary, then after the final timeout, only
1139 "retry timeout exceeded" was returned. Now it returns the full error as
1140 well as "retry timeout exceeded".
1142 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1143 do this, and (what is worse) MTAs that accept it.
1145 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1146 will now be deprecated.
1148 PH/56 New os.c-cygwin from the Cygwin maintainer.
1150 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1151 formats (previously only available in exim formats via -bpr, -bpru,
1152 and -bpra. Now also available in native and exiqgrep formats)
1154 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1155 with very large, slow to parse queues
1157 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1159 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1161 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1162 responses to authentication challenges, though it was showing the
1163 challenges; (ii) I've removed the CR characters from the debug output for
1166 PH/58 Allow for the insertion of a newline as well as a space when a string
1167 is turned into more than one encoded-word during RFC 2047 encoding. The
1168 Sieve code now uses this.
1170 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1171 data_4xx, lost_connection, tls_required.
1173 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1174 message was being sent as an SMTP response.
1176 PH/61 Add -l and -k options to exicyclog.
1178 PH/62 When verifying, if an address was redirected to one new address, so that
1179 verification continued, and the new address failed or deferred after
1180 having set something in $address_data, the value of $address_data was not
1181 passed back to the ACL. This was different to the case when no
1182 redirection occurred. The value is now passed back in both cases.
1184 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1185 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1186 use login_cap.h, so on its own it isn't the distinguishing feature. The
1187 new name refers directly to the setclassresources() function.
1189 PH/65 Added configuration files for NetBSD3.
1191 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1193 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1194 is preferred over IPv4.
1196 PH/68 The bounce_return_message and bounce_return_body options were not being
1197 honoured for bounces generated during the reception of non-SMTP messages.
1198 In particular, this applied to messages rejected by the ACL. This bug has
1199 been fixed. However, if bounce_return_message is true and bounce_return_
1200 body is false, the headers that are returned for a non-SMTP message
1201 include only those that have been read before the error was detected.
1202 (In the case of an ACL rejection, they have all been read.)
1204 PH/69 The HTML version of the specification is now built in a directory called
1205 spec_html instead of spec.html, because the latter looks like a path with
1206 a MIME-type, and this confuses some software.
1208 PH/70 Catch two compiler warnings in sieve.c.
1210 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1211 function verify_get_ident() calls ip_connect() to connect a socket, but
1212 if the "connect()" function timed out, ip_connect() used to close the
1213 socket. However, verify_get_ident() also closes the socket later, and in
1214 between Exim writes to the log, which may get opened at this point. When
1215 the socket was closed in ip_connect(), the log could get the same file
1216 descriptor number as the socket. This naturally causes chaos. The fix is
1217 not to close the socket in ip_connect(); the socket should be closed by
1218 the function that creates it. There was only one place in the code where
1219 this was missing, in the iplookup router, which I don't think anybody now
1220 uses, but I've fixed it anyway.
1222 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1223 well as to direct DNS lookups. Otherwise the handling of names in host
1224 lists is inconsistent and therefore confusing.
1230 PH/01 Two changes to the default runtime configuration:
1232 (1) Move the checks for relay_from_hosts and authenticated clients from
1233 after to before the (commented out) DNS black list checks.
1235 (2) Add control=submission to the relay_from_hosts and authenticated
1236 clients checks, on the grounds that messages accepted by these
1237 statements are most likely to be submissions.
1239 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1241 (1) Generate an error if the third argument for the ${prvs expansion is
1244 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1247 (3) Reset the variables that are obtained from the first argument of
1248 ${prvscheck and used in the second argument before leaving the code,
1249 because their memory is reclaimed, so using them afterwards may do
1252 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1253 one (it's much easier than Tom thought :-).
1255 (5) Because of (4), we can now allow for the use of $prvscheck_result
1256 inside the third argument.
1258 PH/03 For some reason, the default setting of PATH when running a command from
1259 a pipe transport was just "/usr/bin". I have changed it to
1262 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1263 anything to be listed in the output from -bV.
1265 PH/05 When a filter generated an autoreply, the entire To: header line was
1266 quoted in the delivery log line, like this:
1268 => >A.N.Other <ano@some.domain> <original@ddress> ...
1270 This has been changed so that it extracts the operative address. There
1271 may be more than one such address. If so, they are comma-separated, like
1274 => >ano@some.domain,ona@other.domain <original@ddress> ...
1276 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1277 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1278 not being looked up in the rDNS to get a host name, Exim was showing the
1279 IP address twice in Received: lines, even though the IP addresses were
1280 identical. For example:
1282 Received: from [1.2.3.4] (helo=[1.2.3.4])
1284 However, if the real host name was known, it was omitting the HELO data
1285 if it matched the actual IP address. This has been tidied up so that it
1286 doesn't show the same IP address twice.
1288 PH/07 When both +timestamp and +memory debugging was on, the value given by
1289 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1290 called by the debug printing, thereby overwriting the timestamp buffer.
1291 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1293 PH/08 When the original message was included in an autoreply transport, it
1294 always said "this is a copy of the message, including all the headers",
1295 even if body_only or headers_only was set. It now gives an appropriate
1298 PH/09 Applied a patch from the Sieve maintainer which:
1300 o fixes some comments
1301 o adds the (disabled) notify extension core
1302 o adds some debug output for the result of if/elsif tests
1303 o points to the current vacation draft in the documentation
1304 and documents the missing references header update
1308 o fixes a bug in processing the envelope test (when testing
1309 multiple envelope elements, the last element determinted the
1312 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1313 Electronic Mail") by including:
1315 Auto-submitted: auto-generated
1317 in the messages that it generates (bounce messages and others, such as
1318 warnings). In the case of bounce messages for non-SMTP mesages, there was
1319 also a typo: it was using "Auto_submitted" (underscore instead of
1320 hyphen). Since every message generated by Exim is necessarily in response
1321 to another message, thes have all been changed to:
1323 Auto-Submitted: auto-replied
1325 in accordance with these statements in the RFC:
1327 The auto-replied keyword:
1329 - SHOULD be used on messages sent in direct response to another
1330 message by an automatic process,
1332 - MUST NOT be used on manually-generated messages,
1334 - MAY be used on Delivery Status Notifications (DSNs) and Message
1335 Disposition Notifications (MDNs),
1337 - MUST NOT be used on messages generated by automatic or periodic
1338 processes, except for messages which are automatic responses to
1341 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1342 to the default Received: header definition.
1344 PH/12 Added log selector acl_warn_skipped (default on).
1346 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1347 variables because (a) they are in the wrong storage pool and (b) even if
1348 they were copied, it wouldn't work properly because of the caching.
1350 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1351 checking when decoding. Apparently there are clients that generate
1352 overlong encoded strings. Why am I not surprised?
1354 PH/15 If the first argument of "${if match_address" was not empty, but did not
1355 contain an "@" character, Exim crashed. Now it writes a panic log message
1356 and treats the condition as false.
1358 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1360 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1361 extension "envelope-auth". The code is finished and in agreement with
1362 other implementations, but there is no documentation so far and in fact,
1363 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1364 not changing the active code.
1366 Print executed "if" and "elsif" statements when debugging is used. This
1367 helps a great deal to understand what a filter does.
1369 Document more things not specified clearly in RFC3028. I had all this
1370 sorted out, when out of a sudden new issues came to my mind. Oops."
1372 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1375 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1376 canonical form (as documented). However, after a host name lookup from
1377 the IP address, check_host() was doing a simple string comparison with
1378 addresses acquired from the DNS when checking that the found name did
1379 have the original IP as one of its addresses. Since any found IPv6
1380 addresses are likely to be in abbreviated form, the comparison could
1381 fail. Luckily, there already exists a function for doing the comparison
1382 by converting both addresses to binary, so now that is used instead of
1383 the text comparison.
1385 PH/20 There was another similar case to PH/19, when a complete host name was
1386 given in a host list; looking up its IP address could give an abbreviated
1387 form, whereas the current host's name might or might not be abbreviated.
1388 The same fix has been applied.
1394 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1395 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1398 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1399 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1401 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1403 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1404 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1405 Also, for "Auto-Submitted", treat anything other than "no" as
1406 non-personal, in accordance with RFC 3834. (Previously it treated
1407 anything starting "auto-" as non-personal.)
1409 TF/01 The control=submission/name=... option had a problem with syntax
1410 errors if the name included a slash character. The /name= option
1411 now slurps the rest of the string, so it can include any characters
1412 but it must come last in the list of options (after /sender_retain
1415 PH/05 Some modifications to the interface to the fake nameserver for the new
1423 TK/01 Added the "success_on_redirect" address verification option. See
1424 NewStuff for rationale and an example.
1426 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1428 PH/02 Patch to exigrep to allow it to work on syslog lines.
1430 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1431 fread() to skip over the body file's header line, because in Cygwin the
1432 header line is locked and is inaccessible.
1434 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1435 co-exist for some time) to make it clear that it is the Exim ID that is
1436 referenced, not the Message-ID: header line.
1438 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1439 string_format() function, because snprintf() does not exist on all
1442 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1443 ${stat: expansion item.
1445 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1446 protocol synchronization error", to keep the pedants happy.
1448 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1449 well as for IRIX systems, when gcc is being used. See the host.c source
1452 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1454 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1457 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1458 transport and to the smtp transport in LMTP mode.
1460 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1462 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1463 run a filter in a subprocess. This could lead to confusion in subsequent
1464 lookups in the parent process. There should also be a search_tidyup() at
1465 the end of the subprocess.
1467 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1468 only if the host matched helo_try_verify_hosts, which caused the
1469 verification to occur when the EHLO/HELO command was issued. The ACL just
1470 tested the remembered result. Now, if a previous verification attempt has
1471 not happened, "verify = helo" does it there and then.
1473 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1475 TK/03 Fix log output including CR from clamd.
1477 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1478 exist provoked a memory error which could cause a segfault.
1480 PH/15 Installed PCRE 6.2
1482 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1484 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1485 of the problem. Specifically, suggested +O2 rather than +O1 for the
1488 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1490 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1491 record, the port was not correctly logged when the outgoing_port log
1492 selector was set (it logged the transort's default port).
1494 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1495 fallback_hosts, and "hosts" in the smtp transport.
1497 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1498 host errors such as "Connection refused".
1500 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1501 authentication with radiusclient 0.4.9:
1503 - Error returned from rc_read_config was caught wrongly
1504 - Username/password not passed on to radius server due to wrong length.
1506 The presumption is that some radiusclient API changes for 4.51/PH/17
1507 were not taken care of correctly. The code is still untested by me (my
1508 Linux distribution still has 0.3.2 of radiusclient), but it was
1509 contributed by a Radius user.
1511 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1512 expanding the "port" option of the smtp transport.
1514 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1515 while reading a MIME header. Thanks to Tom Hughes for a patch.
1517 PH/24 Include config.h inside local_scan.h so that configuration settings are
1520 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1521 that in an ACL for RCPT (for example), you can examine exactly what was
1524 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1525 commands, but it was not correctly comparing the address with the actual
1526 client host address. Thus, it would show the EHLO address in Received:
1527 header lines when this was not necessary.
1529 PH/27 Added the % operator to ${eval:}.
1531 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1532 it should be ignoring failures (because with -C, for example, it has lost
1533 privilege). It wasn't ignoring creation failures other than "already
1536 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1539 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1540 because an input line was too long, either on its own, or by virtue of
1541 too many continuations, the temporary file was not being removed, and the
1542 return code was incorrect.
1544 PH/31 Missing "BOOL" in function definition in filtertest.c.
1546 PH/32 Applied Sieve patches from the maintainer.
1548 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1550 PH/33 Added "verify = not_blind".
1552 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1553 Local/Makefile (with some defaults set). These are used in built scripts
1554 such as exicyclog, but they have never been used in the exim_install
1555 script (though there are many overriding facilities there). I have
1556 arranged that the exim_install script now takes note of these two
1559 PH/35 Installed configuration files for Dragonfly.
1561 PH/36 When a locally submitted message by a trusted user did not contain a
1562 From: header, and the sender address was obtained from -f or from an SMTP
1563 MAIL command, and the trusted user did not use -F to supply a sender
1564 name, $originator_name was incorrectly used when constructing a From:
1565 header. Furthermore, $originator_name was used for submission mode
1566 messages from external hosts without From: headers in a similar way,
1567 which is clearly wrong.
1569 PH/37 Added control=suppress_local_fixups.
1571 PH/38 When log_selector = +received_sender was set, and the addition of the
1572 sender made the log line's construction buffer exactly full, or one byte
1573 less than full, an overflow happened when the terminating "\n" was
1576 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1577 when the result of a list match is failure because a DNS lookup failed.
1579 PH/40 RM_COMMAND is now used in the building process.
1581 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1582 the "build-* directories that it finds.
1584 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1585 address in a domain literal was a prefix of an interface address.
1587 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1588 when verifying a sender address, unless rewrite_headers is false.
1590 PH/44 Wrote a long comment about why errors_to addresses are verified as
1591 recipients, not senders.
1593 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1594 the ratelimit ACL was added.
1596 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1598 PH/46 Added extra information about PostgreSQL errors to the error string.
1600 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1601 avoiding the need to install special zones in a real server. This is
1602 backwards compatible; if it can't find the fake resolver, it drops back.
1603 Thus, both old and new test suites can be run.
1605 TF/02 Added util/ratelimit.pl
1607 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1608 clock is set back in time.
1610 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1611 Candler <B.Candler@pobox.com>.
1613 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1614 OK for addresses that are the result of redirections.
1616 PH/48 A number of further additions for the benefit of the new test suite,
1617 including a fake gethostbyname() that interfaces to the fake DNS resolver
1620 TF/06 The fix for widen_domains has also been applied to qualify_single and
1621 search_parents which are the other dnslookup options that can cause
1624 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1627 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1629 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1630 service" if it encountered an MX record with an empty target hostname.
1631 The message is now "an MX or SRV record indicated no SMTP service".
1633 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1634 if the DNS of the sending site is misconfigured. This is quite a
1635 common situation. This change restores the behaviour of treating a
1636 helo verification defer as a failure.
1638 PH/51 If self=fail was set on a router, the bounce message did not include the
1639 actual error message.
1645 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1647 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1648 command itself ended in error, the underlying message about the transport
1649 filter timeout was being overwritten with the pipe command error. Now the
1650 underlying error message should be appended to the second error message.
1652 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1654 PH/02 Reduce the amount of output that "make" produces by default. Full output
1655 can still be requested.
1657 PH/03 The warning log line about a condition test deferring for a "warn" verb
1658 was being output only once per connection, rather than after each
1659 occurrence (because it was using the same function as for successful
1660 "warn" verbs). This seems wrong, so I have changed it.
1662 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1663 it should not have, which might have caused a crash in the right
1664 circumstances, but probably never did.
1666 PH/04 Installed a modified version of Tony Finch's patch to make submission
1667 mode fix the return path as well as the Sender: header line, and to
1668 add a /name= option so that you can make the user's friendly name appear
1671 TF/03 Added the control = fakedefer ACL modifier.
1673 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1674 Mark Lowes for thorough testing.
1676 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1678 TK/03 Merged latest SRS patch from Miles Wilton.
1680 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1681 with the definition in sysexits.h (which is #included earlier).
1682 Fortunately, Exim does not actually use EX_OK. The code used to try to
1683 preserve the sysexits.h value, by assumimg that macro definitions were
1684 scanned for macro replacements. I have been disabused of this notion,
1685 so now the code just undefines EX_OK before #including unistd.h.
1687 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1688 in the smtp transport. When a block could not be written in a single
1689 write() function, the timeout was being re-applied to each part-write.
1690 This seems wrong - if the receiver was accepting one byte at a time it
1691 would take for ever. The timeout is now adjusted when this happens. It
1692 doesn't have to be particularly precise.
1694 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1695 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1697 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1698 without a domain if the check to <postmaster@domain> fails.
1700 SC/01 Eximstats: added -xls and the ability to specify output files
1701 (patch written by Frank Heydlauf).
1703 SC/02 Eximstats: use FileHandles for outputing results.
1705 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1707 SC/04 Eximstats: fixed display of large numbers with -nvr option
1709 SC/05 Eximstats: fixed merging of reports with empty tables.
1711 SC/06 Eximstats: added the -include_original_destination flag
1713 SC/07 Eximstats: removed tabs and trailing whitespace.
1715 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1717 TK/06 MBOX spool code: Add real "From " MBOX separator line
1718 so the .eml file is really in mbox format (even though
1719 most programs do not really care). Patch from Alex Miller.
1721 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1722 The latter is generated from $received_to and is only set if the
1723 message has one envelope recipient. SA can use these headers,
1724 obviously out-of-the-box. Patch from Alex Miller.
1726 PH/08 The ${def test on a variable was returning false if the variable's
1727 value was "0", contrary to what the specification has always said!
1728 The result should be true unless the variable is empty.
1730 PH/09 The syntax error of a character other than { following "${if
1731 def:variable_name" (after optional whitespace) was not being diagnosed.
1732 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1733 accidental colon was present, for example, could give incorrect results.
1735 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1736 result is used (not including appendfile, where other changes are about
1739 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1740 This involved changing a lot of size variables from int to off_t. It
1741 should work with maildirs and everything.
1743 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1744 spamd dying while we are connected to it.
1746 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1749 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1750 function for BDB 4.3.
1752 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1754 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1755 the sources for PCRE have been re-arranged and more files are now
1758 PH/15 The code I had for printing potentially long long variables in PH/11
1759 above was not the best (it lost precision). The length of off_t variables
1760 is now inspected at build time, and an appropriate printing format (%ld
1761 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1762 to be "long long int" or "long int". This is needed for the internal
1763 formatting function string_vformat().
1765 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1766 the configuration file to be ":syslog", then the script "guesses" where
1767 the logs files are, rather than using the compiled in default. In our
1768 case the guess is not the same as the compiled default, so the script
1769 suddenly stopped working when I started to use syslog. The patch checks
1770 to see if log_file_path is "". If so, it attempts to read it from exim
1771 with no configuration file to get the compiled in version, before it
1772 falls back to the previous guessing code."
1774 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1775 implementing BATV in an Exim configuration. See NewStuff for the gory
1778 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1779 Makefile that are specific to HP-UX.
1781 PH/18 If the "use_postmaster" option was set for a recipient callout together
1782 with the "random" option, the postmaster address was used as the MAIL
1783 FROM address for the random test, but not for the subsequent recipient
1784 test. It is now used for both.
1786 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1787 patch removes a few documentation additions to RFC 3028, because the
1788 latest draft now contains them. It adds the new en;ascii-case comparator
1789 and a new error check for 8bit text in MIME parts. Comparator and
1790 require names are now matched exactly. I enabled the subaddress
1791 extension, but it is not well tested yet (read: it works for me)."
1793 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1794 rework some of the code of TK/09 above to avoid the hardwired use of
1795 "%lld" and "long long". Replaced the call to snprintf() with a call to
1798 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1799 records point to non-existent hosts", "retry timeout exceeded", and
1800 "retry time not reached for any host after a long failure period".
1802 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1803 experimental DomainKeys support:
1805 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1806 (2) On an error such as an illegally used "control", the wrong name for
1807 the control was given.
1809 These problems did NOT occur unless DomainKeys support was compiled.
1811 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1813 PH/24 Added ${if match_ip condition.
1815 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1816 databases so that it will be absolutely obvious if a crash occurs in the
1817 DB library. This is a regular occurrence (often caused by mis-matched
1820 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1821 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1822 picked up on a user's system that detects such things. There doesn't seem
1823 to be a gcc warning option for this - only an attribute that has to be
1824 put on the function's prototype. It seems that in Fedora Core 4 they have
1825 set this on a number of new functions. No doubt there will be more in due
1828 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1829 specify a transport. However, if an address that was verified by such a
1830 router was the subject of a callout, Exim crashed because it tried to
1831 read the rcpt_include_affixes from the non-existent transport. Now it
1832 just assumes that the setting of that option is false. This bug was
1833 introduced by 4.51/PH/31.
1835 PH/28 Changed -d+all to exclude +memory, because that information is very
1836 rarely of interest, but it makes the output a lot bigger. People tend to
1837 do -d+all out of habit.
1839 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1840 code in os-type was giving problems when libc.so lives in lib64, like on
1843 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1844 aren't the modern standard, and it seems that some systems' include files
1845 don't always have them. Exim was already checking for some of the newer
1846 ones like T_AAAA, and defining it itself. I've added checks for all the
1847 record types that Exim uses.
1849 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1850 not automatically generating a new one, as it is supposed to. This
1851 prevented TLS from working. If the file did exist, but contained invalid
1852 data, a new version was generated, as expected. It was only the case of a
1853 non-existent file that was broken.
1855 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1856 with a change in libdomainkeys > 0.64.
1858 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1859 from DNS. If the selector record carries the flag, it now has
1860 precedence over the domain-wide flag.
1862 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1864 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1865 the use of a port name that isn't defined in /etc/services) occurred, the
1866 message was deferred as in a normal delivery, and thus remained on the
1867 spool, instead of being failed because of the mua_wrapper setting. This
1868 is now fixed, and I tidied up some of the mua_wrapper messages at the
1871 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1872 the messages in a hash of arrays rather than using individual hashes.
1873 This is a bit cleaner and results in dramatic memory savings, albeit
1874 at a slight CPU cost.
1876 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1877 as requested by Marc Sherman.
1879 SC/10 Eximstats: added histograms for user specified patterns as requested
1882 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1884 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1885 fopen() in the content-scanning modules that did not already have it.
1891 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1892 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1894 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1896 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1898 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1899 to test Sieve filters that use "vacation".
1901 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1902 that changes the way the GnuTLS parameters are stored in the cache file.
1903 The new format can be generated externally. For backward compatibility,
1904 if the data in the cache doesn't make sense, Exim assumes it has read an
1905 old-format file, and it generates new data and writes a new file. This
1906 means that you can't go back to an older release without removing the
1909 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1910 work if there are any delivery delays because "one_time" forces the
1911 parent to be marked "delivered", so its unseen clone is never tried
1912 again. For this reason, Exim now forbids the simultaneous setting of
1915 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1916 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1917 entry if you want to know the details. The fix, however, neglected to
1918 consider the case when local delivery batching is involved. The test for
1919 "previously delivered" was not happening when checking to see if an
1920 address could be batched with a previous (undelivered) one; under
1921 certain circumstances this could lead to multiple deliveries to the same
1924 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1925 in its include files, and this causes problems building Exim.
1927 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1928 header_syntax) but Exim was just ignoring anything given after a slash.
1929 In particular, this caused confusion with an attempt to use "verify =
1930 reverse_host_lookup/defer_ok". An error is now given when options are
1931 supplied for verify items that do not have them. (Maybe reverse_host_
1932 lookup should have a defer_ok option, but that's a different point.)
1934 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1935 defined by RFC 821) to 2048, because there were problems with some AUTH
1936 commands, and RFC 1869 says the size should be increased for extended
1937 SMTP commands that take arguments.
1939 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1942 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1943 "unknown" error; now it says that the functionality isn't in the binary.
1945 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1946 an address' error message when a string expansion fails (syntax or
1947 whatever). Otherwise the password may appear in the log. Following change
1948 PH/42 below, there is no longer a chance of it appearing in a bounce
1951 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1953 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1954 of its addresses was ever tried. (Bugzilla bug #2.)
1956 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1957 the result incorrectly in the debug output. (It correctly added a newline
1958 to what was transported.)
1960 TF/01 Added $received_time.
1962 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1963 commented out examples of how to interface to a virus scanner and to
1964 SpamAssassin. Also added commented examples of av_scanner and
1965 spamd_address settings.
1967 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1968 and controls are allowed in which ACLs. There were a couple of minor
1969 errors. Some of the entries in the conditions table (which is a table of
1970 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1971 negation of where the condition IS allowed.
1973 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1975 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1976 header file does not have a version number, so I've had to invent a new
1977 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1978 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1979 radiusclient), but it was contributed by a Radius user.
1981 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1982 files or directories, for OpenSSL.
1984 PH/19 When an Exim process that is running as root has to create an Exim log
1985 file, it does so in a subprocess that runs as exim:exim so as to get the
1986 ownership right at creation (otherwise, other Exim processes might see
1987 the file with the wrong ownership). There was no test for failure of this
1988 fork() call, which would lead to the process getting stuck as it waited
1989 for a non-existent subprocess. Forks do occasionally fail when resources
1990 run out. I reviewed all the other calls to fork(); they all seem to check
1993 PH/20 When checking for unexpected SMTP input at connect time (before writing
1994 the banner), Exim was not dealing correctly with a non-positive return
1995 from the read() function. If the client had disconnected by this time,
1996 the result was a log entry for a synchronization error with an empty
1997 string after "input=" when read() returned zero. If read() returned -1
1998 (an event I could not check), uninitialized data bytes were printed.
1999 There were reports of junk text (parts of files, etc) appearing after
2002 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2004 PH/22 Added support for macro redefinition, and (re)definition in between
2005 driver and ACL definitions.
2007 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2008 forgetting to use the resulting value; it was using the unexpanded value.
2010 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2011 hadn't been configured. The fix is from Juergen Kreileder, who
2012 understands it better than I do:
2014 "Here's what I see happening with three configured cyrus_sasl
2015 authenticators configured (plain, login, cram-md5):
2017 On startup auth_cyrus_sasl_init() gets called for each of these.
2018 This means three calls to sasl_listmech() without a specified mech_list.
2019 => SASL tests which mechs of all available mechs actually work
2020 => three warnings about OTP not working
2021 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2023 With the patch, sasl_listmech() also gets called three times. But now
2024 SASL's mech_list option is set to the server_mech specified in the the
2025 authenticator. Or in other words, the answer from sasl_listmech()
2026 gets limited to just the mech you're testing for (which is different
2028 => the return list contains just 'plain' or 'login', 'cram-md5' or
2029 nothing depending on the value of ob->server_mech.
2031 I've just tested the patch: Authentication still works fine,
2032 unavailable mechs specified in the exim configuration are still
2033 caught, and the auth.log warnings about OTP are gone."
2035 PH/25 When debugging is enabled, the contents of the command line are added
2036 to the debugging output, even when log_selector=+arguments is not
2039 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2040 answer is "GNU", and only if the return is "GNU/something" is the answer
2043 PH/27 $acl_verify_message is now set immediately after the failure of a
2044 verification in an ACL, and so is available in subsequent modifiers. In
2045 particular, the message can be preserved by coding like this:
2047 warn !verify = sender
2048 set acl_m0 = $acl_verify_message
2050 Previously, $acl_verify_message was set only while expanding "message"
2051 and "log_message" when a very denied access.
2053 PH/28 Modified OS/os.c-Linux with
2055 -#ifndef OS_LOAD_AVERAGE
2056 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2058 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2059 nomenclature these days.)
2061 PH/29 Installed patch from the Sieve maintainer that adds the options
2062 sieve_useraddress and sieve_subaddress to the redirect router.
2064 PH/30 In these circumstances:
2065 . Two addresses routed to the same list of hosts;
2066 . First host does not offer TLS;
2067 . First host accepts first address;
2068 . First host gives temporary error to second address;
2069 . Second host offers TLS and a TLS session is established;
2070 . Second host accepts second address.
2071 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2072 and peerdn, if requested) that were in fact used only for the second
2075 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2076 attention to any local part prefix or suffix that was matched by the
2077 router that accepted the address. It now behaves in the same way as it
2078 does for delivery: the affixes are removed from the local part unless
2079 rcpt_include_affixes is set on the transport.
2081 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2082 timeout during the DATA phase of an incoming message.
2084 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2085 applied a patch sanctioned by the Sieve maintainer.
2087 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2088 the uid or gid is negative. A case of a negative gid caused this to be
2089 noticed. The fix allows for either to be negative.
2091 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2092 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2095 PH/36 The change PH/12 above was broken. Fixed it.
2097 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2098 the grounds that routing the same address twice would always produce the
2099 same answer. This might have been true once, but it is certainly no
2100 longer true now. Routing a child address may depend on the previous
2101 routing that produced that child. Some complicated redirection strategies
2102 went wrong when messages had multiple recipients, and made Exim's
2103 behaviour dependent on the order in which the addresses were given.
2105 I have moved the duplicate checking until after the routing is complete.
2106 Exim scans the addresses that are assigned to local and remote
2107 transports, and removes any duplicates. This means that more work will be
2108 done, as duplicates will always all be routed, but duplicates are
2109 presumably rare, so I don't expect this is of any significance.
2111 For deliveries to pipes, files, and autoreplies, the duplicate checking
2112 still happens during the routing process, since they are not going to be
2115 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2116 It corrects a timeout issue with spamd. This is Ian's comment: "The
2117 background is that sometimes spamd either never reads data from a
2118 connection it has accepted, or it never writes response data. The exiscan
2119 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2120 blindly assumes that writes won't block so it may never time out."
2122 PH/39 Allow G after quota size as well as K and M.
2124 PH/40 The value set for $authenticated_id in an authenticator may not contain
2125 binary zeroes or newlines because the value is written to log lines and
2126 to spool files. There was no check on this. Now the value is run through
2127 the string_printing() function so that such characters are converted to
2128 printable escape sequences.
2130 PH/41 $message_linecount is a new variable that contains the total number of
2131 lines in the message. Compare $body_linecount, which is the count for the
2134 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2135 bounce and delay warning messages, except in certain special cases, which
2138 (a) An SMTP error message from a remote host;
2139 (b) A message specified in a :fail: redirection;
2140 (c) A message specified in a "fail" command in a system filter;
2141 (d) A message specified in a FAIL return from the queryprogram router;
2142 (e) A message specified by the cannot_route_message router option.
2144 In these cases only, Exim does include the error details in bounce and
2145 warning messages. There are also a few cases where bland messages such
2146 as "unrouteable address" or "local delivery error" are given.
2148 PH/43 $value is now also set for the "else" part of a ${run expansion.
2150 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2151 being worked on, but at least Exim now implements the latest version to
2154 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2155 process to complete was treated as a delivery failure, a timeout while
2156 writing the message to the pipe was logged, but erroneously treated as a
2157 successful delivery. Such timeouts include transport filter timeouts. For
2158 consistency with the overall process timeout, these timeouts are now
2159 treated as errors, giving rise to delivery failures by default. However,
2160 there is now a new Boolean option for the pipe transport called
2161 timeout_defer, which, if set TRUE, converts the failures into defers for
2162 both kinds of timeout. A transport filter timeout is now identified in
2165 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2166 systems where "make" and "gmake" are different, calling "gmake" at top
2167 level broke things. I've arranged for the value of $(MAKE) to be passed
2168 from the Makefile to this script so that it can call the same version of
2172 A note about Exim versions 4.44 and 4.50
2173 ----------------------------------------
2175 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2176 changes of various kinds. As a consequence, a big documentation update was
2177 needed. This delayed the release for rather longer than seemed good, especially
2178 in the light of a couple of (minor) security issues. Therefore, the changes
2179 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2180 release. So 4.44 and 4.50 are in effect two different branches that both start
2183 I have left the 4.50 change log unchanged; it contains all the changes since
2184 4.43. The change log for 4.44 is below; many of its items are identical to
2185 those for 4.50. This seems to be the most sensible way to preserve the
2186 historical information.
2192 1. Minor wording change to the doc/README.SIEVE file.
2194 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2195 computation of the current number of files was incorrect.
2197 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2198 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2201 4. Give more explanation in the error message when the command for a transport
2202 filter fails to execute.
2204 5. There are several places where Exim runs a non-Exim command in a
2205 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2206 was being done only for the command run by the queryprogram router. It is
2207 now done for all such subprocesses. The other cases are: ${run, transport
2208 filters, and the commands run by the lmtp and pipe transports.
2210 6. Added CONFIGURE_GROUP build-time option.
2212 7. Some older OS have a limit of 256 on the maximum number of file
2213 descriptors. Exim was using setrlimit() to set 1000 as a large value
2214 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2215 systems. I've change it so that if it can't get 1000, it tries for 256.
2217 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2218 was an oversight, and furthermore, ever since the addition of extra
2219 controls (e.g. 4.43/32), the checks on when to allow different forms of
2220 "control" were broken. There should now be diagnostics for all cases when a
2221 control that does not make sense is encountered.
2223 9. Added the /retain_sender option to "control=submission".
2225 10. $recipients is now available in the predata ACL (oversight).
2227 11. Tidy the search cache before the fork to do a delivery from a message
2228 received from the command line. Otherwise the child will trigger a lookup
2229 failure and thereby defer the delivery if it tries to use (for example) a
2230 cached ldap connection that the parent has called unbind on.
2232 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2233 of $address_data from the recipient verification was clobbered by the
2234 sender verification.
2236 13. The value of address_data from a sender verification is now available in
2237 $sender_address_data in subsequent conditions in the ACL statement.
2239 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2241 15. Added a new option "connect=<time>" to callout options, to set a different
2244 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2245 was its contents. (It was OK if the option was not defined at all.)
2247 17. A "Completed" log line is now written for messages that are removed from
2248 the spool by the -Mrm option.
2250 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2251 information about exactly what failed.
2253 19. Added -dd to debug only the daemon process.
2255 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2256 handles timeouts, both on the server side and network timeouts. Renamed the
2257 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2259 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2260 It is now set to "smtps".
2262 22. $host_address is now set to the target address during the checking of
2263 ignore_target_hosts.
2265 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2266 being passed; this would have caused $sender_host_name to have been used if
2267 matching the list had actually called for a host name (not very likely,
2268 since this list is usually IP addresses). A host name is now passed as
2271 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2272 code that specifies a non-restarting handler (typically sigaction() in
2273 modern systems) in an attempt to fix a rare and obscure crash bug.
2275 25. Narrowed the window for a race in the daemon that could cause it to ignore
2276 SIGCHLD signals. This is not a major problem, because they are used only to
2277 wake it up if nothing else does.
2279 26. A malformed maildirsize file could cause Exim to calculate negative values
2280 for the mailbox size or file count. Odd effects could occur as a result.
2281 The maildirsize information is now recalculated if the size or filecount
2284 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2285 support for a long time. Removed HAVE_SYS_VFS_H.
2287 28. Installed the latest version of exipick from John Jetmore.
2289 29. In an address list, if the pattern was not a regular expression, an empty
2290 subject address (from a bounce message) matched only if the pattern was an
2291 empty string. Non-empty patterns were not even tested. This was the wrong
2292 because it is perfectly reasonable to use an empty address as part of a
2293 database query. An empty address is now tested by patterns that are
2294 lookups. However, all the other forms of pattern expect the subject to
2295 contain a local part and a domain, and therefore, for them, an empty
2296 address still always fails if the pattern is not itself empty.
2298 30. Exim went into a mad DNS loop when attempting to do a callout where the
2299 host was specified on an smtp transport, and looking it up yielded more
2300 than one IP address.
2302 31. Re-factored the code for checking spool and log partition space into a
2303 function that finds that data and another that does the check. The former
2304 is then used to implement four new variables: $spool_space, $log_space,
2305 $spool_inodes, and $log_inodes.
2307 32. The RFC2047 encoding function was originally intended for short strings
2308 such as real names; it was not keeping to the 75-character limit for
2309 encoded words that the RFC imposes. It now respects the limit, and
2310 generates multiple encoded words if necessary. To be on the safe side, I
2311 have increased the buffer size for the ${rfc2047: expansion operator from
2314 33. It is now permitted to omit both strings after an "if" condition; if the
2315 condition is true, the result is "true". As before, when the second string
2316 is omitted, a false condition yields an empty string. This makes it less
2317 cumbersome to write custom ACL and router conditions.
2319 34. Failure to deliver a bounce message always caused it to be frozen, even if
2320 there was an errors_to setting on the router. The errors_to setting is now
2323 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2324 canonical form (fully expanded) before being placed in
2325 $sender_host_address.
2327 36. The table in the code that translates DNS record types into text (T_A to
2328 "A" for instance) was missing entries for NS and CNAME. It is just possible
2329 that this could have caused confusion if both these types were looked up
2330 for the same domain, because the text type is used as part of Exim's
2331 per-process caching. But the chance of anyone hitting this buglet seems
2334 37. The dnsdb lookup has been extended in a number of ways.
2336 (1) There is a new type, "zns", which walks up the domain tree until it
2337 finds some nameserver records. It should be used with care.
2339 (2) There is a new type, "mxh", which is like "mx" except that it returns
2340 just the host names, not the priorities.
2342 (3) It is now possible to give a list of domains (or IP addresses) to be
2343 looked up. The behaviour when one of the lookups defers can be
2344 controlled by a keyword.
2346 (4) It is now possible to specify the separator character for use when
2347 multiple records are returned.
2349 38. The dnslists ACL condition has been extended: it is now possible to supply
2350 a list of IP addresses and/or domains to be looked up in a particular DNS
2353 39. Added log_selector=+queue_time_overall.
2355 40. When running the queue in the test harness, wait just a tad after forking a
2356 delivery process, to get repeatability of debugging output.
2358 41. Include certificate and key file names in error message when GnuTLS fails
2359 to set them up, because the GnuTLS error message doesn't include the name
2360 of the failing file when there is a problem reading it.
2362 42. Allow both -bf and -bF in the same test run.
2364 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2366 44. The "Exiscan patch" is now merged into the mainline Exim source.
2368 45. Sometimes the final signoff response after QUIT could fail to get
2369 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2370 < 0 before doing a fflush(). This bug looks as though it goes back to the
2371 introduction of TLS in release 3.20, but "sometimes" must have been rare
2372 because the tests only now provoked it.
2374 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2375 (this can affect the format of dates).
2377 47. exim_tidydb, when checking for the continued existence of a message for
2378 which it has found a message-specific retry record, was not finding
2379 messages that were in split spool directories. Consequently, it was
2380 deleting retry records that should have stayed in existence.
2382 48. Steve fixed some bugs in eximstats.
2384 49. The SPA authentication driver was not abandoning authentication and moving
2385 on to the next authenticator when an expansion was forced to fail,
2386 contradicting the general specification for all authenticators. Instead it
2387 was generating a temporary error. It now behaves as specified.
2389 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2390 (the order specifies the preference for clients). The order is now AES256,
2391 AES128, 3DES, ARCFOUR128.
2393 51. Small patch to Sieve code - explicitly set From: when generating an
2396 52. Exim crashed if a remote delivery caused a very long error message to be
2397 recorded - for instance if somebody sent an entire SpamAssassin report back
2398 as a large number of 550 error lines. This bug was coincidentally fixed by
2399 increasing the size of one of Exim's internal buffers (big_buffer) that
2400 happened as part of the Exiscan merge. However, to be on the safe side, I
2401 have made the code more robust (and fixed the comments that describe what
2404 53. Now that there can be additional text after "Completed" in log lines (if
2405 the queue_time_overall log selector is set), a one-byte patch to exigrep
2406 was needed to allow it to recognize "Completed" as not the last thing in
2409 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2410 patch that reportedly fixes this has been added. I am not expert enough to
2411 create a test for it. This is what the patch creator wrote:
2413 "I found a little strange behaviour of ldap code when working with
2414 Windows 2003 AD Domain, where users was placed in more than one
2415 Organization Units. When I tried to give exim partial DN, the exit code
2416 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2417 But simultaneously result of request was absolutely normal ldap result,
2418 so I produce this patch..."
2420 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2421 REFERENCE, so I have modified the code to exclude the patch when that macro
2424 55. Some experimental protocols are using DNS PTR records for new purposes. The
2425 keys for these records are domain names, not reversed IP addresses. The
2426 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2427 leaves it alone. Component reversal etc. now happens only for IP addresses.
2430 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2432 57. Double the size of the debug message buffer (to 2048) so that more of very
2433 long debug lines gets shown.
2435 58. The exicyclog utility now does better if the number of log files to keep
2436 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2438 59. Two changes related to the smtp_active_hostname option:
2440 (1) $smtp_active_hostname is now available as a variable.
2441 (2) The default for smtp_banner uses $smtp_active_hostname instead
2442 of $primary_hostname.
2444 60. The host_aton() function is supposed to be passed a string that is known
2445 to be a valid IP address. However, in the case of IPv6 addresses, it was
2446 not checking this. This is a hostage to fortune. Exim now panics and dies
2447 if the condition is not met. A case was found where this could be provoked
2448 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2449 components; fortuitously, this particular loophole had already been fixed
2450 by change 4.50/55 above.
2452 If there are any other similar loopholes, the new check in host_aton()
2453 itself should stop them being exploited. The report I received stated that
2454 data on the command line could provoke the exploit when Exim was running as
2455 exim, but did not say which command line option was involved. All I could
2456 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2457 running as the user.
2460 61. There was a buffer overflow vulnerability in the SPA authentication code
2461 (which came originally from the Samba project). I have added a test to the
2462 spa_base64_to_bits() function which I hope fixes it.
2465 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2466 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2468 63. The daemon start-up calls getloadavg() while still root for those OS that
2469 need the first call to be done as root, but it missed one case: when
2470 deliver_queue_load_max is set with deliver_drop_privilege. This is
2471 necessary for the benefit of the queue runner, because there is no re-exec
2472 when deliver_drop_privilege is set.
2474 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2475 This has been fixed.
2477 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2478 was in use, was not putting the data itself into the right store pool;
2479 consequently, it could be overwritten for a subsequent message in the same
2480 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2483 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2485 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2486 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2487 the function were treating the return as a boolean value, which happened to
2488 work because 0=false and not-0=true, but is not correct code.
2490 68. The host_aton() function was not handling scoped IPv6 addresses (those
2491 with, for example, "%eth0" on the end) correctly.
2493 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2494 negated items (that is, ~something) in unsigned ints. Some compilers
2495 apparently mutter when there is no cast.
2497 70. If an address verification called from an ACL failed, and did not produce a
2498 user-specific message (i.e. there was only a "system" message), nothing was
2499 put in $acl_verify_message. In this situation, it now puts the system
2502 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2503 session; change 4.31/43 added the unwanted input to the log line - except
2504 that it did not do this in the start of session case. It now does.
2506 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2507 This is wrong and can cause the other end to generate a synchronization
2508 error if it is another Exim or anything else that does the synchronization
2509 check. A QUIT command is no longer sent after a timeout.
2511 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2512 during host lookups.
2514 74. The defer_ok option of callout verification was not working if it was used
2515 when verifying addresses in header lines, that is, for this case:
2517 verify = header_sender/callout=defer_ok
2519 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2520 those file descriptors could be used for SMTP connections. If anything
2521 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2522 could be sent to the SMTP client, causing chaos. The daemon now opens
2523 stdin, stdout, and stderr to /dev/null when it puts itself into the
2526 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2527 log by default. The user can override this with suitable Perl magic.
2529 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2530 the log message when discard triggers, was not working for the DATA ACL or
2531 for the non-SMTP ACL.
2533 78. Error message wording change in sieve.c.
2535 79. If smtp_accept_max_per_host was set, the number of connections could be
2536 restricted to fewer than expected, because the daemon was trying to set up
2537 a new connection before checking whether the processes handling previous
2538 connections had finished. The check for completed processes is now done
2539 earlier. On busy systems, this bug wouldn't be noticed because something
2540 else would have woken the daemon, and it would have reaped the completed
2543 80. If a message was submitted locally by a user whose login name contained one
2544 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2545 It caused a spool format error. I have fixed the spool reading code. A
2546 related problem was that the "from" clause in the Received: line became
2547 illegal because of the space(s). It is now covered by ${quote_local_part.
2549 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2552 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2554 83. Patch from Sieve maintainer to fix unterminated string problem in
2555 "vacation" handling.
2557 84. Some minor changes to the Linux configuration files to help with other
2558 OS variants using glibc.
2560 85. One more patch for Sieve to update vacation handling to latest spec.
2563 ----------------------------------------------------
2564 See the note above about the 4.44 and 4.50 releases.
2565 ----------------------------------------------------
2571 1. Change 4.43/35 introduced a bug that caused file counts to be
2572 incorrectly computed when quota_filecount was set in an appendfile
2575 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2576 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2579 3. Give more explanation in the error message when the command for a transport
2580 filter fails to execute.
2582 4. There are several places where Exim runs a non-Exim command in a
2583 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2584 was being done only for the command run by the queryprogram router. It is
2585 now done for all such subprocesses. The other cases are: ${run, transport
2586 filters, and the commands run by the lmtp and pipe transports.
2588 5. Some older OS have a limit of 256 on the maximum number of file
2589 descriptors. Exim was using setrlimit() to set 1000 as a large value
2590 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2591 systems. I've change it so that if it can't get 1000, it tries for 256.
2593 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2594 was an oversight, and furthermore, ever since the addition of extra
2595 controls (e.g. 4.43/32), the checks on when to allow different forms of
2596 "control" were broken. There should now be diagnostics for all cases when a
2597 control that does not make sense is encountered.
2599 7. $recipients is now available in the predata ACL (oversight).
2601 8. Tidy the search cache before the fork to do a delivery from a message
2602 received from the command line. Otherwise the child will trigger a lookup
2603 failure and thereby defer the delivery if it tries to use (for example) a
2604 cached ldap connection that the parent has called unbind on.
2606 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2607 of $address_data from the recipient verification was clobbered by the
2608 sender verification.
2610 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2611 was its contents. (It was OK if the option was not defined at all.)
2613 11. A "Completed" log line is now written for messages that are removed from
2614 the spool by the -Mrm option.
2616 12. $host_address is now set to the target address during the checking of
2617 ignore_target_hosts.
2619 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2620 being passed; this would have caused $sender_host_name to have been used if
2621 matching the list had actually called for a host name (not very likely,
2622 since this list is usually IP addresses). A host name is now passed as
2625 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2626 code that specifies a non-restarting handler (typically sigaction() in
2627 modern systems) in an attempt to fix a rare and obscure crash bug.
2629 15. Narrowed the window for a race in the daemon that could cause it to ignore
2630 SIGCHLD signals. This is not a major problem, because they are used only to
2631 wake it up if nothing else does.
2633 16. A malformed maildirsize file could cause Exim to calculate negative values
2634 for the mailbox size or file count. Odd effects could occur as a result.
2635 The maildirsize information is now recalculated if the size or filecount
2638 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2639 support for a long time. Removed HAVE_SYS_VFS_H.
2641 18. Updated exipick to current release from John Jetmore.
2643 19. Allow an empty sender to be matched against a lookup in an address list.
2644 Previously the only cases considered were a regular expression, or an
2647 20. Exim went into a mad DNS lookup loop when doing a callout where the
2648 host was specified on the transport, if the DNS lookup yielded more than
2651 21. The RFC2047 encoding function was originally intended for short strings
2652 such as real names; it was not keeping to the 75-character limit for
2653 encoded words that the RFC imposes. It now respects the limit, and
2654 generates multiple encoded words if necessary. To be on the safe side, I
2655 have increased the buffer size for the ${rfc2047: expansion operator from
2658 22. Failure to deliver a bounce message always caused it to be frozen, even if
2659 there was an errors_to setting on the router. The errors_to setting is now
2662 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2663 canonical form (fully expanded) before being placed in
2664 $sender_host_address.
2666 24. Updated eximstats to version 1.33
2668 25. Include certificate and key file names in error message when GnuTLS fails
2669 to set them up, because the GnuTLS error message doesn't include the name
2670 of the failing file when there is a problem reading it.
2672 26. Expand error message when OpenSSL has problems setting up cert/key files.
2675 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2676 (this can affect the format of dates).
2678 28. exim_tidydb, when checking for the continued existence of a message for
2679 which it has found a message-specific retry record, was not finding
2680 messages that were in split spool directories. Consequently, it was
2681 deleting retry records that should have stayed in existence.
2683 29. eximstats updated to version 1.35
2684 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2685 1.35 - bugfix such that pie charts by volume are generated correctly
2687 30. The SPA authentication driver was not abandoning authentication and moving
2688 on to the next authenticator when an expansion was forced to fail,
2689 contradicting the general specification for all authenticators. Instead it
2690 was generating a temporary error. It now behaves as specified.
2692 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2693 (the order specifies the preference for clients). The order is now AES256,
2694 AES128, 3DES, ARCFOUR128.
2696 31. Small patch to Sieve code - explicitly set From: when generating an
2699 32. Exim crashed if a remote delivery caused a very long error message to be
2700 recorded - for instance if somebody sent an entire SpamAssassin report back
2701 as a large number of 550 error lines. This bug was coincidentally fixed by
2702 increasing the size of one of Exim's internal buffers (big_buffer) that
2703 happened as part of the Exiscan merge. However, to be on the safe side, I
2704 have made the code more robust (and fixed the comments that describe what
2707 33. Some experimental protocols are using DNS PTR records for new purposes. The
2708 keys for these records are domain names, not reversed IP addresses. The
2709 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2710 leaves it alone. Component reversal etc. now happens only for IP addresses.
2713 34. The host_aton() function is supposed to be passed a string that is known
2714 to be a valid IP address. However, in the case of IPv6 addresses, it was
2715 not checking this. This is a hostage to fortune. Exim now panics and dies
2716 if the condition is not met. A case was found where this could be provoked
2717 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2718 components; fortuitously, this particular loophole had already been fixed
2719 by change 4.50/55 or 4.44/33 above.
2721 If there are any other similar loopholes, the new check in host_aton()
2722 itself should stop them being exploited. The report I received stated that
2723 data on the command line could provoke the exploit when Exim was running as
2724 exim, but did not say which command line option was involved. All I could
2725 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2726 running as the user.
2729 35. There was a buffer overflow vulnerability in the SPA authentication code
2730 (which came originally from the Samba project). I have added a test to the
2731 spa_base64_to_bits() function which I hope fixes it.
2734 36. The daemon start-up calls getloadavg() while still root for those OS that
2735 need the first call to be done as root, but it missed one case: when
2736 deliver_queue_load_max is set with deliver_drop_privilege. This is
2737 necessary for the benefit of the queue runner, because there is no re-exec
2738 when deliver_drop_privilege is set.
2740 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2741 was in use, was not putting the data itself into the right store pool;
2742 consequently, it could be overwritten for a subsequent message in the same
2743 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2746 38. Sometimes the final signoff response after QUIT could fail to get
2747 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2748 < 0 before doing a fflush(). This bug looks as though it goes back to the
2749 introduction of TLS in release 3.20, but "sometimes" must have been rare
2750 because the tests only now provoked it.
2756 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2757 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2758 Now it returns an integer. A number of calls were still expecting a T/F
2759 return. Fortuitously, in all cases, the tests worked in OK situations,
2760 which is the norm. However, things would have gone wrong on any write
2761 failures on the smtp file descriptor. This function is used when sending
2762 messages over SMTP and also when doing verify callouts.
2764 2. When Exim is called to do synchronous delivery of a locally submitted
2765 message (the -odf or -odi options), it no longer closes stderr before doing
2768 3. Implemented the mua_wrapper option.
2770 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2772 5. Implemented the functions header_remove(), header_testname(),
2773 header_add_at_position(), and receive_remove_recipient(), and exported them
2776 6. If an ACL "warn" statement specified the addition of headers, Exim already
2777 inserted X-ACL-Warn: at the start if there was no header name. However, it
2778 was not making this test for the second and subsequent header lines if
2779 there were newlines in the string. This meant that an invalid header could
2780 be inserted if Exim was badly configured.
2782 7. Allow an ACL "warn" statement to add header lines at the start or after all
2783 the Received: headers, as well as at the end.
2785 8. Added the rcpt_4xx retry error code.
2787 9. Added postmaster_mailfrom=xxx to callout verification option.
2789 10. Added mailfrom=xxxx to the callout verification option, for verify=
2792 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2793 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2795 12. Inserted some casts to stop certain compilers warning when using pointer
2796 differences as field lengths or precisions in printf-type calls (mostly
2797 affecting debugging statements).
2799 13. Added optional readline() support for -be (dynamically loaded).
2801 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2802 same clock tick as a message's arrival, so that its received time was the
2803 same as the "first fail" time on the retry record, and that message
2804 remained on the queue past the ultimate address timeout, every queue runner
2805 would try a delivery (because it was past the ultimate address timeout) but
2806 after another failure, the ultimate address timeout, which should have then
2807 bounced the address, did not kick in. This was a "< instead of <=" error;
2808 in most cases the first failure would have been in the next clock tick
2809 after the received time, and all would be well.
2811 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2812 being recognized when the domain list was tested by the match_domain
2813 condition in an expansion string.
2815 16. Added the ${str2b64: operator.
2817 17. Exim was always calling setrlimit() to set a large limit for the number of
2818 processes, without checking whether the existing limit was already
2819 adequate. (It did check for the limit on file descriptors.) Furthermore,
2820 errors from getrlimit() and setrlimit() were being ignored. Now they are
2821 logged to the main and panic logs, but Exim does carry on, to try to do its
2822 job under whatever limits there are.
2824 18. Imported PCRE 5.0.
2826 19. Trivial typo in log message " temporarily refused connection" (the leading
2829 20. If the log selector return_path_on_delivery was set and an address was
2830 redirected to /dev/null, the delivery process crashed because it assumed
2831 that a return path would always be set for a "successful" delivery. In this
2832 case, the whole delivery is bypassed as an optimization, and therefore no
2835 21. Internal re-arrangement: the function for sending a challenge and reading
2836 a response while authentication was assuming a zero-terminated challenge
2837 string. It's now changed to take a pointer and a length, to allow for
2838 binary data in such strings.
2840 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2842 23. Exim was not respecting finduser_retries when seeking the login of the
2843 uid under which it was called; it was always trying 10 times. (The default
2844 setting of finduser_retries is zero.) Also, it was sleeping after the final
2845 failure, which is pointless.
2847 24. Implemented tls_on_connect_ports.
2849 25. Implemented acl_smtp_predata.
2851 26. If the domain in control=submission is set empty, Exim assumes that the
2852 authenticated id is a complete email address when it generates From: or
2853 Sender: header lines.
2855 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2856 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2857 chown and chgrp in /bin and hostname in /usr/bin.
2859 28. Exim was keeping the "process log" file open after each use, just as it
2860 does for the main log. This opens the possibility of it remaining open for
2861 long periods when the USR1 signal hits a daemon. Occasional processlog
2862 errors were reported, that could have been caused by this. Anyway, it seems
2863 much more sensible not to leave this file open at all, so that is what now
2866 29. The long-running daemon process does not normally write to the log once it
2867 has entered its main loop, and it closes the log before doing so. This is
2868 so that log files can straightforwardly be renamed and moved. However,
2869 there are a couple of unusual error situations where the daemon does write
2870 log entries, and I had neglected to close the log afterwards.
2872 30. The text of an SMTP error response that was received during a remote
2873 delivery was being truncated at 512 bytes. This is too short for some of
2874 the long messages that one sometimes sees. I've increased the limit to
2877 31. It is now possible to make retry rules that apply only when a message has a
2878 specific sender, in particular, an empty sender.
2880 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2881 it possible to be selective about when SMTP synchronization is enforced.
2883 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2885 32. Implemented hosts_connection_nolog.
2887 33. Added an ACL for QUIT.
2889 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2892 35. Added mailbox_size and mailbox_filecount to appendfile.
2894 36. Added control = no_multiline_responses to ACLs.
2896 37. There was a bug in the logic of the code that waits for the clock to tick
2897 in the case where the clock went backwards by a substantial amount such
2898 that the microsecond fraction of "now" was more than the microsecond
2899 fraction of "then" (but the whole seconds number was less).
2901 38. Added support for the libradius Radius client library this is found on
2902 FreeBSD (previously only the radiusclient library was supported).
2908 1. When certain lookups returned multiple values in the form name=value, the
2909 quoting of the values was not always being done properly. Specifically:
2910 (a) If the value started with a double quote, but contained no whitespace,
2912 (b) If the value contained whitespace other than a space character (i.e.
2913 tabs or newlines or carriage returns) it was not quoted.
2914 This fix has been applied to the mysql and pgsql lookups by writing a
2915 separate quoting function and calling it from the lookup code. The fix
2916 should probably also be applied to nisplus, ibase and oracle lookups, but
2917 since I cannot test any of those, I have not disturbed their existing code.
2919 2. A hit in the callout cache for a specific address caused a log line with no
2920 reason for rejecting RCPT. Now it says "Previous (cached) callout
2921 verification failure".
2923 3. There was an off-by-one bug in the queryprogram router. An over-long
2924 return line was truncated at 256 instead of 255 characters, thereby
2925 overflowing its buffer with the terminating zero. As well as fixing this, I
2926 have increased the buffer size to 1024 (and made a note to document this).
2928 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2929 when Exim is waiting for an SMTP response from a remote server, Exim
2930 restarts its select() call on the socket, thereby resetting its timeout.
2931 This is not a problem when such interrupts are rare. Somebody set up a cron
2932 job to run exiwhat every 2 minutes, which is less than the normal select()
2933 timeout (5 or 10 minutes). This meant that the select() timeout never
2934 kicked in because it was always reset. I have fixed this by comparing the
2935 time when an interrupt arrives with the time at the start of the first call
2936 to select(). If more time than the timeout has elapsed, the interrupt is
2937 treated as a timeout.
2939 5. Some internal re-factoring in preparation for the addition of Sieve
2940 extensions (by MH). In particular, the "personal" test is moved to a
2941 separate function, and given an option for scanning Cc: and Bcc: (which is
2942 not set for Exim filters).
2944 6. When Exim created an email address using the login of the caller as the
2945 local part (e.g. when creating a From: or Sender: header line), it was not
2946 quoting the local part when it contained special characters such as @.
2948 7. Installed new OpenBSD configuration files.
2950 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2951 try to make them clearer.
2953 9. Callout options, other than the timeout value, were being ignored when
2954 verifying sender addresses in header lines. For example, when using
2956 verify = header_sender/callout=no_cache
2958 the cache was (incorrectly) being used.
2960 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2961 only the Cygwin environment.
2963 11. When return_path_on_delivery was set as a log selector, if different remote
2964 addresses in the same message used different return paths and parallel
2965 remote delivery occurred, the wrong values would sometimes be logged.
2966 (Whenever a remote delivery process finished, the return path value from
2967 the most recently started remote delivery process was logged.)
2969 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2970 lines when AUTH and/or TLS are in use. This is the "received protocol"
2971 field. Exim used to use "asmtp" for authenticated SMTP, without any
2972 indication (in the protocol name) for TLS use. Now it follows the RFC and
2973 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2974 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2975 names appear in log lines as well as in Received: header lines.
2977 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2978 extensions, and comparison tests, and to fix some bugs.
2980 14. Changes to the "personal" filter test:
2982 (1) The test was buggy in that it was just doing the equivalent of
2983 "contains" tests on header lines. For example, if a user's address was
2984 anne@some.where, the "personal" test would incorrectly be true for
2986 To: susanne@some.where
2988 This test is now done by extracting each address from the header in turn,
2989 and checking the entire address. Other tests that are part of "personal"
2990 are now done using regular expressions (for example, to check local parts
2991 of addresses in From: header lines).
2993 (2) The list of non-personal local parts in From: addresses has been
2994 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2995 taken from the Sieve specification recommendations.
2997 (3) If the message contains any header line starting with "List-" it is
2998 treated as non-personal.
3000 (4) The test for "circular" in the Subject: header line has been removed
3001 because it now seems ill-conceived.
3003 15. Minor typos in src/EDITME comments corrected.
3005 16. Installed latest exipick from John Jetmore.
3007 17. If headers_add on a router specified a text string that was too long for
3008 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3009 of string_sprintf() is now avoided.
3011 18. $message_body_size was not set (it was always zero) when running the DATA
3012 ACL and the local_scan() function.
3014 19. For the "mail" command in an Exim filter, no default was being set for
3015 the once_repeat time, causing a random time value to be used if "once" was
3016 specified. (If the value happened to be <= 0, no repeat happened.) The
3017 default is now 0s, meaning "never repeat". The "vacation" command was OK
3018 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3019 (I found it when inspecting the code).
3021 20. There is now an overall timeout for performing a callout verification. It
3022 defaults to 4 times the callout timeout, which applies to individual SMTP
3023 commands during the callout. The overall timeout applies when there is more
3024 than one host that can be tried. The timeout is checked before trying the
3025 next host. This prevents very long delays if there are a large number of
3026 hosts and all are timing out (e.g. when the network connections are timing
3027 out). The value of the overall timeout can be changed by specifying an
3028 additional sub-option for "callout", called "maxwait". For example:
3030 verify = sender/callout=5s,maxwait=20s
3032 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3033 to the end before writing, but this should make it even safer).
3035 22. Exim was forgetting that it had advertised PIPELINING for the second and
3036 subsequent messages on an SMTP connection. It was also not resetting its
3037 memory on STARTTLS and an internal HELO.
3039 23. When Exim logs an SMTP synchronization error within a session, it now
3040 records whether PIPELINING has been advertised or not.
3042 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3043 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3044 rather than long int.
3046 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3048 26. Added the never_mail option to autoreply.
3054 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3055 crash if the getsockname() call failed; this can happen if a connection is
3056 closed very soon after it is established. The problem was simply in the
3057 order in which certain operations were done, causing Exim to try to write
3058 to the SMTP stream before it had set up the file descriptor. The bug has
3059 been fixed by making things happen in the correct order.
3065 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3066 before the connection was closed, thus losing the rejection response.
3068 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3069 some early Solaris releases, but causes trouble in current releases where
3070 socklen_t is defined.
3072 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3075 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3078 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3079 that releasing the top of it at the end releases what was used for sub-
3080 expansions (unless the block got too big). However, discard this block if
3081 the first thing is a variable or header, so that we can use its block when
3082 it is dynamic (useful for very large $message_headers, for example).
3084 6. Lookups now cache *every* query, not just the most recent. A new, separate
3085 store pool is used for this. It can be recovered when all lookup caches are
3086 flushed. Lookups now release memory at the end of their result strings.
3087 This has involved some general refactoring of the lookup sources.
3089 7. Some code has been added to the store_xxx() functions to reduce the amount
3090 of flapping under certain conditions.
3092 8. log_incoming_interface used to affect only the <= reception log lines. Now
3093 it causes the local interface and port to be added to several more SMTP log
3094 lines, for example "SMTP connection from", and rejection lines.
3096 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3098 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3100 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3101 could be overwritten at the end of the current message (or the start of a
3102 new message if it was set in a HELO ACL). The value is now preserved for
3103 the duration of the SMTP connection.
3105 12. If a transport had a headers_rewrite setting, and a matching header line
3106 contained an unqualified address, that address was qualified, even if it
3107 did not match any rewriting rules. The underlying bug was that the values
3108 of the flags that permit the existence of unqualified sender and recipient
3109 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3110 non-local messages, and by -bnq for local messages) were not being
3111 preserved with the message after it was received.
3113 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3114 "next input=" as part of the text comprising the host identity instead of
3115 the correct text. The code was using the same buffer for two different
3116 strings. However, depending on which order the printing function evaluated
3117 its arguments, the bug did not always show up. Under Linux, for example, my
3118 test suite worked just fine.
3120 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3121 doesn't work with some older versions of Perl. It has been changed to "my",
3122 which in any case is probably the better facility to use.
3124 15. A really picky compiler found some instances of statements for creating
3125 error messages that either had too many or two few arguments for the format
3128 16. The size of the buffer for calls to the DNS resolver has been increased
3129 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3130 for addresses that have a lot of PTR records. This alleviates a problem; it
3131 does not fully solve it.
3133 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3134 buffer now truncates the list and logs the incident, which is the same
3135 action as happens when Exim is looking up a host name and its aliases.
3136 Previously in this situation something unpredictable would happen;
3137 sometimes it was "internal error: store_reset failed".
3139 18. If a server dropped the connection unexpectedly when an Exim client was
3140 using GnuTLS and trying to read a response, the client delivery process
3141 crashed while trying to generate an error log message.
3143 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3144 string, for example:
3146 warn message = H1: something\nH2: something
3148 the text was added as a single header line from Exim's point of view
3149 though it ended up OK in the delivered message. However, searching for the
3150 second and subsequent header lines using $h_h2: did not work. This has been
3151 fixed. Similarly, if a system filter added multiple headers in this way,
3152 the routers could not see them.
3154 20. Expanded the error message when iplsearch is called with an invalid key to
3155 suggest using net-iplsearch in a host list.
3157 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3158 ACLs are no longer actually imposed (and a message to that effect is
3161 22. If a "gecos" field in a passwd entry contained escaped characters, in
3162 particular, if it contained a \" sequence, Exim got it wrong when building
3163 a From: or a Sender: header from that name. A second bug also caused
3164 incorrect handling when an unquoted " was present following a character
3165 that needed quoting.
3167 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3168 was not being matched caselessly.
3170 24. Arranged for all hyphens in the exim.8 source to be escaped with
3173 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3174 properly. Recipient callout cache records were still being keyed to include
3175 the sender, even when use_sender was set false. This led to far more
3176 callouts that were necessary. The sender is no longer included in the key
3177 when use_sender is false.
3179 26. Added "control = submission" modifier to ACLs.
3181 27. Added the ${base62d: operator to decode base 62 numbers.
3183 28. dnsdb lookups can now access SRV records.
3185 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3186 the configuration file.
3188 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3189 (-v) mode. This makes the output for a verbose queue run more intelligible.
3191 31. Added a use_postmaster feature to recipient callouts.
3193 32. Added the $body_zerocount variable, containing the number of binary zero
3194 bytes in the message body.
3196 33. The time of last modification of the "new" subdirectory is now used as the
3197 "mailbox time last read" when there is a quota error for a maildir
3200 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3202 35. Added +ignore_unknown as a special item in host lists.
3204 36. Code for decoding IPv6 addresses in host lists is now included, even if
3205 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3206 address was recognized as an IP address, but was then not correctly decoded
3207 into binary, causing unexpected and incorrect effects when compared with
3214 1. Very minor rewording of debugging text in manualroute to say "list of
3215 hosts" instead of "hostlist".
3217 2. If verify=header_syntax was set, and a header line with an unqualified
3218 address (no domain) and a large number of spaces between the end of the
3219 name and the colon was received, the reception process suffered a buffer
3220 overflow, and (when I tested it) crashed. This was caused by some obsolete
3221 code that should have been removed. The fix is to remove it!
3223 3. When running in the test harness, delay a bit after writing a bounce
3224 message to get a bit more predictability in the log output.
3226 4. Added a call to search_tidyup() just before forking a reception process. In
3227 theory, someone could use a lookup in the expansion of smtp_accept_max_
3228 per_host which, without the tidyup, could leave open a database connection.
3230 5. Added the variables $recipient_data and $sender_data which get set from a
3231 lookup success in an ACL "recipients" or "senders" condition, or a router
3232 "senders" option, similar to $domain_data and $local_part_data.
3234 6. Moved the writing of debug_print from before to after the "senders" test
3237 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3238 problems for message scanning, either using a data ACL, or using
3239 local_scan() because the Received: header was not generated till after they
3240 were called (in order to set the time as the time of reception completion).
3241 I have revised the way this works. The header is now generated after the
3242 body is received, but before the ACL or local_scan() are called. After they
3243 are run, the timestamp in the header is updated.
3249 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3250 before starting a queue runner without re-exec. This happened only when
3251 deliver_drop_privilege was set or when the Exim user was set to root. The
3252 effect of the bug was that timeouts during subsequent deliveries caused
3253 crashes instead of being properly handled. The handler is now left at its
3254 default (and expected) setting.
3256 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3257 message, again when deliver_drop_privilege is set or Exim is run as root.
3258 The bug described in (1) was not present in this case, but the tidying up
3259 of the other signals was missing. I have made the two cases consistent.
3261 3. The ignore_target_hosts setting on a manualroute router was being ignored
3262 for hosts that were looked up using the /MX notation.
3264 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3267 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3268 operated on the sender address. After changing the $sender_address to <>
3269 for the sender address verify, Exim was re-instated it as the original
3270 (before rewriting) address, but remembering that it had rewritten it, so it
3271 wasn't rewriting it again. This bug also had the effect of breaking the
3272 sender address verification caching when the sender address was rewritten.
3274 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3275 This has been changed so that if the ip literal address matches
3276 ignore_target_hosts, the router declines.
3278 7. Added expansion conditions match_domain, match_address, and match_local_
3279 part (NOT match_host).
3281 8. The placeholder for the Received: header didn't have a length field set.
3283 9. Added code to Exim itself and to exim_lock to test for a specific race
3284 condition that could lead to file corruption when using MBX delivery. The
3285 issue is with the lockfile that is created in /tmp. If this file is removed
3286 after a process has opened it but before that process has acquired a lock,
3287 there is the potential for a second process to recreate the file and also
3288 acquire a lock. This could lead to two Exim processes writing to the file
3289 at the same time. The added code performs the same test as UW imapd; it
3290 checks after acquiring the lock that its file descriptor still refers to
3291 the same named file.
3293 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3294 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3297 11. Added the smtp_active_hostname option. If used, this will typically be made
3298 to depend on the incoming interface address. Because $interface_address is
3299 not set up until the daemon has forked a reception process, error responses
3300 that can happen earlier (such as "too many connections") no longer contain
3303 12. If an expansion in a condition on a "warn" statement fails because a lookup
3304 defers, the "warn" statement is abandoned, and the next ACL statement is
3305 processed. Previously this caused the whole ACL to be aborted.
3307 13. Added the iplsearch lookup type.
3309 14. Added ident_timeout as a log selector.
3311 15. Added tls_certificate_verified as a log selector.
3313 16. Added a global option tls_require_ciphers (compare the smtp transport
3314 option of the same name). This controls incoming TLS connections.
3316 17. I finally figured out how to make tls_require_ciphers do a similar thing
3317 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3318 before starting the TLS session.
3320 18. Tabs are now shown as \t in -bP output.
3322 19. If the log selector return_path_on_delivery was set, Exim crashed when
3323 bouncing a message because it had too many Received: header lines.
3325 20. If two routers both had headers_remove settings, and the first one included
3326 a superfluous trailing colon, the final name in the first list and the
3327 first name in the second list were incorrectly joined into one item (with a
3328 colon in the middle).
3334 1. Added -C and -D options to the exinext utility, mainly to make it easier
3335 to include in the automated testing, but these could be helpful when
3336 multiple configurations are in use.
3338 2. The exinext utility was not formatting the output nicely when there was
3339 an alternate port involved in the retry record key, nor when there was a
3340 message id as well (for retries that were specific to a specific message
3341 and a specific host). It was also confused by IPv6 addresses, because of
3342 the additional colons they contain. I have fixed the IPv4 problem, and
3343 patched it up to do a reasonable job for IPv6.
3345 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3346 delivery, the log line now contains "pipelined" if PIPELINING was used.
3348 4. An SMTP transport process used to panic and die if the bind() call to set
3349 an explicit outgoing interface failed. This has been changed; it is now
3350 treated in the same way as a connect() failure.
3352 5. A reference to $sender_host_name in the part of a conditional expansion
3353 that was being skipped was still causing a DNS lookup. This no longer
3356 6. The def: expansion condition was not recognizing references to header lines
3357 that used bh_ and bheader_.
3359 7. Added the _cache feature to named lists.
3361 8. The code for checking quota_filecount in the appendfile transport was
3362 allowing one more file than it should have been.
3364 9. For compatibility with Sendmail, the command line option
3372 and sets the incoming protocol and host name (for trusted callers). The
3373 host name and its colon can be omitted when only the protocol is to be set.
3374 Note the Exim already has two private options, -pd and -ps, that refer to
3375 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3376 "s", but I don't think that's a major issue.
3378 10. A number of refactoring changes to the code, none of which should affect
3381 (a) The number of logging options was getting close to filling up the
3382 32-bit word that was used as a bit map. I have split them into two classes:
3383 those that are passed in the argument to log_write(), and those that are
3384 only ever tested independently outside of that function. These are now in
3385 separate 32-bit words, so there is plenty of room for expansion again.
3386 There is no change in the user interface or the logging behaviour.
3388 (b) When building, for example, log lines, the code previously used a
3389 macro that called string_cat() twice, in order to add two strings. This is
3390 not really sufficiently general. Furthermore, there was one instance where
3391 it was actually wrong because one of the argument was used twice, and in
3392 one call a function was used. (As it happened, calling the function twice
3393 did not affect the overall behaviour.) The macro has been replaced by a
3394 function that can join an arbitrary number of extra strings onto a growing
3397 (c) The code for expansion conditions now uses a table and a binary chop
3398 instead of a serial search (which was left over from when there were very
3399 few conditions). Also, it now recognizes conditions like "pam" even when
3400 the relevant support is not compiled in: a suitably worded error message is
3401 given if an attempt is made to use such a condition.
3403 11. Added ${time_interval:xxxxx}.
3405 12. A bug was causing one of the ddress fields not to be passed back correctly
3406 from remote delivery subprocesses. The field in question was not being
3407 subsequently used, so this caused to problems in practice.
3409 13. Added new log selectors queue_time and deliver_time.
3411 14. Might have fixed a bug in maildirsizefile handling that threw up
3412 "unexpected character" debug warnings, and recalculated the data
3413 unnecessarily. In any case, I expanded the warning message to give more
3416 15. Added the message "Restricted characters in address" to the statements in
3417 the default ACL that block characters like @ and % in local parts.
3419 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3420 Three changes have been made:
3422 (a) There was a serious bug; a negative response to MAIL caused the whole
3423 recipient domain to be cached as invalid, thereby blocking all messages
3424 to all local parts at the same domain, from all senders. This bug has
3425 been fixed. The domain is no longer cached after a negative response to
3426 MAIL if the sender used is not empty.
3428 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3431 (c) A new callout option, "use_sender" has been added for people who want
3432 the modified behaviour.
3438 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3441 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3442 indeed breaks things for older releases.
3444 3. Added additional logging to the case where there is a problem reading data
3445 from a filter that is running in a subprocess using a pipe, in order to
3446 try to track down a specific problem.
3448 4. Testing facility fudge: when running in the test harness and attempting
3449 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3450 getting "No route to host". Convert this to a timeout.
3452 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3455 6. Some OS don't have socklen_t but use size_t instead. This affects the
3456 fifth argument of getsockopt() amongst other things. This is now
3457 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3458 can be set for individual OS. I have set it for SunOS5, OSF1, and
3459 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3460 some earlier ones do not.
3462 7. Change 4.30/15 was not doing the test caselessly.
3464 8. The standard form for an IPv6 address literal was being rejected by address
3465 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3466 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3467 this, as well as the form without the "IPv6" on the front (but only when
3468 address literals are enabled, of course).
3470 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3472 10. Exim crashed if a message with an empty sender address specified by -f
3473 encountered a router with an errors_to setting. This could be provoked only
3474 by a command such as
3478 where an empty string was supplied; "<>" did not hit this bug.
3480 11. Installed PCRE release 4.5.
3482 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3483 remained set. It is now erased.
3485 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3486 times from message ids (which are base 36 rather than the normal 62).
3488 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3489 were being counted as actual protocol errors, and logged if the log
3490 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3491 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3492 and DATA following a set of rejected RCPTs do not count as protocol errors.
3493 In other words, Exim assumes they were pipelined, though this may not
3494 actually be the case. Of course, in all cases the client gets an
3495 appropriate error code.
3497 15. If a lookup fails in an ACL condition, a message about the failure may
3498 be available; it is used if testing the ACL cannot continue, because most
3499 such messages specify what the cause of the deferral is. However, some
3500 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3501 that caused an old message to be retained and used if a later statement
3502 caused a defer, replacing the real cause of the deferral.
3504 16. If an IP address had so many PTR records that the DNS lookup buffer
3505 was not large enough to hold them, Exim could crash while trying to process
3506 the truncated data. It now detects and logs this case.
3508 17. Further to 4.21/58, another change has been made: if (and only if) the
3509 first line of a message (the first header line) ends with CRLF, a bare LF
3510 in a subsequent header line has a space inserted after it, so as not to
3511 terminate the header.
3513 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3514 unnecessarily, used atoi() instead of strtol(), and didn't check the
3515 termination when getting file sizes from file names by regex.
3517 19. Completely re-implemented the support for maildirsize files, in the light
3518 of a number of problems with the previous contributed implementation
3519 (4.30/29). In particular:
3521 . If the quota is zero, the maildirsize file is maintained, but no quota is
3524 . If the maildir directory does not exist, it is created before any attempt
3525 to write a maildirsize file.
3527 . The quota value in the file is just a cache; if the quota is changed in
3528 the transport, the new value overrides.
3530 . A regular expression is available for excluding directories from the
3533 20. The autoreply transport checks the characters in options that define the
3534 message's headers; it allows continued headers, but it was checking with
3535 isspace() after an embedded newline instead of explicitly looking for a
3538 21. If all the "regular" hosts to which an address was routed had passed their
3539 expiry times, and had not reached their retry times, the address was
3540 bounced, even if fallback hosts were defined. Now Exim should go on to try
3543 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3544 equivalent code in the SMTP transport. Some hosts send humungous responses
3545 to HELO/EHLO, more than 1024 it seems.
3547 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3548 gives compiler warnings in some environments. I've now done it "properly",
3551 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3552 (because of problems with the built-in one) was declared to return uschar *
3553 instead of char *, causing compiler failure.
3555 25. Fixed a file descriptor leak when processing alias/forward files.
3557 26. Fixed a minor format string issue in dbfn.c.
3559 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3561 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3562 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3565 29. When a sender address is verified, it is cached, to save repeating the test
3566 when there is more than one recipient in a message. However, when the
3567 verification involves a callout, it is possible for different callout
3568 options to be set for different recipients. It is too complicated to keep
3569 track of this in the cache, so now Exim always runs a verification when a
3570 callout is required, relying on the callout cache for the optimization.
3571 The overhead is duplication of the address routing, but this should not be
3574 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3575 to be verified with callout=postmaster, and the main callout worked but the
3576 postmaster check failed, the verification correctly failed. However, if a
3577 subsequent RCPT command asked for sender verification *without* the
3578 postmaster check, incorrect caching caused this verification also to fail,
3581 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3582 it was not caching the DNS options (qualify_single, search_parents) that
3583 were used when the lookup failed. A subsequent lookup with different
3584 options therefore always gave the same answer, though there were cases
3585 where it should not have. (Example: a "domains = !$mx_any" option on a
3586 dnslookup router: the "domains" option is always processed without any
3587 widening, but the router might have qualify_single set.) Now Exim uses the
3588 cached value only when the same options are set.
3590 32. Added John Jetmore's "exipick" utility to the distribution.
3592 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3593 than a timeout (e.g. a certificate is required, and is not provided), an
3594 Exim server now closes the connection immediately. Previously it waited for
3595 the client to close - but if the client is SSL, it seems that they each
3596 wait for each other, leading to a delay before one of them times out.
3598 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3599 maintained 0.8.x compatibility because I don't think many are using it, and
3600 it is clearly obsolete.
3602 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3605 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3606 client certificate was expired. A simple patch fixes this, though I don't
3607 understand the full logic of why the verify callback is called multiple
3610 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3611 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3612 which causes problems with some clients (such as the Certicom SSL Plus
3613 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3614 disables the coutermeasure allowing Eudora to connect."
3616 38. Exim was not checking that a write() to a log file succeeded. This could
3617 lead to Bad Things if a log got too big, in particular if it hit a file
3618 size limit. Exim now panics and dies if it cannot write to a log file, just
3619 as it does if it cannot open a log file.
3621 39. Modified OS/Makefile-Linux so that it now contains
3623 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3625 The two -D definitions ensure that Exim is compiled with large file
3626 support, which makes it possible to handle log files that are bigger than
3629 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3630 instance) a domain was checked against a named list that involved a lookup,
3631 causing $domain_data to be set, then another domain was checked against the
3632 same list, then the first domain was re-checked, the value of $domain_data
3633 after the final check could be wrong. In particular, if the second check
3634 failed, it could be set empty. This bug probably also applied to
3637 41. The strip_trailing_dot option was not being applied to the address given
3638 with the -f command-line option.
3640 42. The code for reading a message's header from the spool was incrementing
3641 $received_count, but never initializing it. This meant that the value was
3642 incorrect (doubled) while delivering a message in the same process in which
3643 it was received. In the most common configuration of Exim, this never
3644 happens - a fresh exec is done - but it can happen when
3645 deliver_drop_privilege is set.
3647 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3648 it now includes up to 150 characters of the unexpected data in the log
3651 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3652 and building data strings. The size of both of these buffers was 10 000
3653 bytes - far larger than anybody would *ever* want, thought I. Needless to
3654 say, somebody hit the limit. I have increased the maximum line length to
3655 20 000 and the maximum data length of concatenated lines to 100 000. I have
3656 also fixed two bugs, because there was no checking on these buffers. Tsk,
3657 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3658 buffer is too small.
3660 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3661 lsearch lookups. Now it does.
3663 46. When parsing a route_list item in a manualroute router, a fixed-length
3664 buffer was used for the list of hosts. I made this 1024 bytes long,
3665 thinking that nobody would ever have a list of hosts that long. Wrong.
3666 Somebody had a whole pile of complicated expansion conditions, and the
3667 string was silently truncated, leading to an expansion error. It turns out
3668 that it is easier to change to an unlimited length (owing to other changes
3669 that have happened since this code was originally written) than to build
3670 structure for giving a limitation error. The length of the item that
3671 expands into the list of hosts is now unlimited.
3673 47. The lsearch lookup could not handle data where the length of text line was
3674 more than 4095 characters. Such lines were truncated, leading to shortened
3675 data being returned. It should now handle lines of any length.
3677 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3678 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3681 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3682 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3683 no longer happens in comment lines. A list of replacements is now placed
3684 at the head of all of the source files, except those whose only change is
3685 to replace PERL_COMMAND in the very first #! line.
3687 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3688 messages on the queue, with a bottom-up merge sort, using code contributed
3689 by Michael Haardt. This should make operations like -bp somewhat faster on
3690 large queues. It won't affect queue runners, except when queue_run_in_order
3693 51. Installed eximstats 1.31 in the distribution.
3695 52. Added support for SRV lookups to the dnslookup router.
3697 53. If an ACL referred to $message_body or $message_body_end, the value was not
3698 reset for any messages that followed in the same SMTP session.
3700 54. The store-handling optimization for building very long strings was not
3701 differentiating between the different store pools. I don't think this
3702 actually made any difference in practice, but I've tidied it.
3704 55. While running the routers to verify a sender address, $sender_address
3705 was still set to the sender address. This is wrong, because when routing to
3706 send a bounce to the sender, it would be empty. Therefore, I have changed
3707 it so that, while verifying a sender address, $sender_address is set to <>.
3708 (There is no change to what happens when verifying a recipient address.)
3710 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3711 target A or AAAA records (if not already returned) without resetting the
3712 qualify_single or search_parents options of the DNS resolver. These are
3713 inappropriate in this case because the targets of MX and SRV records must
3714 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3715 target that, when qualified, matched something in the local domain. These
3716 two options are now turned off when doing these lookups.
3718 57. It seems that at least some releases of Reiserfs (which does not have the
3719 concept of a fixed number of inodes) returns zero and not -1 for the
3720 number of available inodes. This interacted badly with check_spool_inodes,
3721 which assumed that -1 was the "no such thing" setting. What I have done is
3722 to check that the total number of inodes is greater than zero before doing
3723 the test of how many are available.
3725 58. When a "warn" ACL statement has a log_message modifier, the message is
3726 remembered, and not repeated. This is to avoid a lot of repetition when a
3727 message has many recipients that cause the same warning to be written.
3728 Howewer, Exim was preserving the list of already written lines for an
3729 entire SMTP session, which doesn't seem right. The memory is now reset if a
3730 new message is started.
3732 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3733 debugging output unless log_rewrite was also set.
3735 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3736 of (int)(handle) when we know that handle contains (void *)(-1).
3738 61. The Exim daemon panic-logs an error return when it closes the incoming
3739 connection. However "connection reset by peer" seems to be common, and
3740 isn't really an error worthy of noting specially, so that particular error
3743 62. When Exim is trying to find all the local interfaces, it used to panic and
3744 die if the ioctl to get the interface flags failed. However, it seems that
3745 on at least one OS (Solaris 9) it is possible to have an interface that is
3746 included in the list of interfaces, but for which you get a failure error
3747 for this call. This happens when the interface is not "plumbed" into a
3748 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3749 failure of the "get flags" call assumes that the interface is down.
3751 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3752 makes life easier for people who are doing arithmetic on fields extracted
3753 from dates, where you often get leading zeros that should not be
3754 interpreted as octal.
3756 64. Added qualify_domain to the redirect router, to override the global
3759 65. If a pathologically long header line contained very many addresses (the
3760 report of this problem mentioned 10 000) and each of them was rewritten,
3761 Exim could use up a very large amount of memory. (It kept on making new
3762 copies of the header line as it rewrote, and never released the old ones.)
3763 At the expense of a bit more processing, the header rewriting function has
3764 been changed so that it no longer eats memory in this way.
3766 66. The generation of the Received: header has been moved from the time that a
3767 message starts to be received, to the time that it finishes. The timestamp
3768 in the Received: header should now be very close to that of the <= log
3769 line. There are two side-effects of this change:
3771 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3772 logged header lines no longer include the local Received: line, because
3773 it has not yet been created. The same applies to a copy of the message
3774 that is returned to a non-SMTP sender when a message is rejected.
3776 (b) When a filter file is tested using -bf, no additional Received: header
3777 is added to the test message. After some thought, I decided that this
3780 This change does not affect the value of $received_for. It is still set
3781 after address rewriting, but before local_scan() is called.
3783 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3785 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3786 gave an unhelpful panic error message, and a defer error. I have managed to
3787 change this behaviour so that it now rejects any supplied certificate,
3788 which seems right, as the list of acceptable certificates is empty.
3790 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3791 gave an unhelpful defer error. I have not managed to make this reject any
3792 supplied certificates, but the error message it gives is "no certificate
3793 supplied", which is not helpful.
3795 70. exigrep's output now also includes lines that are not associated with any
3796 message, but which match the given pattern. Implemented by a patch from
3797 Martin Sluka, which also tidied up the Perl a bit.
3799 71. Recipient callout verification, like sender verification, was using <> in
3800 the MAIL FROM command. This isn't really the right thing, since the actual
3801 sender may affect whether the remote host accepts the recipient or not. I
3802 have changed it to use the actual sender in the callout; this means that
3803 the cache record is now keyed on a recipient/sender pair, not just the
3804 recipient address. There doesn't seem to be a real danger of callout loops,
3805 since a callout by the remote host to check the sender would use <>.
3806 [SEE ABOVE: changed after hitting problems.]
3808 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3809 temporary errors. However, in the case of such a code being given after
3810 the end of a data transmission (i.e. after ".") Exim was failing to write
3811 a retry record for the message. (Yes, there was some broken host that was
3812 actually sending 8xx at this point.)
3814 73. An unknown lookup type in a host list could cause Exim to panic-die when
3815 the list was checked. (An example that provoked this was putting <; in the
3816 middle of a list instead of at the start.) If this happened during a DATA
3817 ACL check, a -D file could be left lying around. This kind of configuration
3818 error no longer causes Exim to die; instead it causes a defer errror. The
3819 incident is still logged to the main and panic logs.
3821 74. Buglet left over from Exim 3 conversion. The message "too many messages
3822 in one connection" was written to the rejectlog but not the mainlog, except
3823 when address rewriting (yes!) was being logged.
3825 75. Added write_rejectlog option.
3827 76. When a system filter was run not as root (that is, when system_filter_user
3828 was set), the values of the $n variables were not being returned to the
3829 main process; thus, they were not subsequently available in the $sn
3832 77. Added +return_path_on_delivery log selector.
3834 78. A connection timeout was being treated differently from recipients deferred
3835 when testing hosts_max_try with a message that was older than the host's
3836 retry timeout. (The host should not be counted, thus allowing all hosts to
3837 be tried at least once before bouncing.) This may have been the cause of an
3838 occasionally reported bug whereby a message would remain on the queue
3839 longer than the retry timeout, but would be bounced if a delivery was
3840 forced. I say "may" because I never totally pinned down the problem;
3841 setting up timeout/retry tests is difficult. See also the next item.
3843 79. The ultimate address timeout was not being applied to errors that involved
3844 a combination of host plus message (for example, a timeout on a MAIL
3845 command). When an address resolved to a number of possible hosts, and they
3846 were not all tried for each delivery (e.g. because of hosts_max_try), a
3847 message could remain on the queue longer than the retry timeout.
3849 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3852 81. Fixed an obscure SMTP outgoing bug which required at least the following
3853 conditions: (a) there was another message waiting for the same server;
3854 (b) the server returned 5xx to all RCPT commands in the first message so
3855 that the message was not completed; (c) the server dropped the connection
3856 or gave a negative response to the RSET that Exim sends to abort the
3857 transaction. The observed case was a dropped connection after DATA that had
3858 been sent in pipelining mode. That is, the server had advertised PIPELINING
3859 but was not implementing it correctly. The effect of the bug was incorrect
3860 behaviour, such as trying another host, and this could lead to a crash.
3866 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3867 and daemon.c were passed as pointers to ints; they should have been
3868 pointers to socklen_t variables (which are typically unsigned ints).
3870 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3873 3. Fixed a really odd bug that affected only the testing scheme; patching a
3874 certain fixed string in the binary changed the value of another string that
3875 happened to be identical to the end of the original first string.
3877 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3878 name", it returns that address as the IP address. On some operating
3879 systems (e.g. Solaris), it also passes back the IP address string as the
3880 "host name". However, on others (e.g. Linux), it passes back an empty
3881 string. Exim wasn't checking for this, and was changing the host name to an
3882 empty string, assuming it had been canonicized.
3884 5. Although rare, it is permitted to have more than one PTR record for a given
3885 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3886 all the names associated with an address, because they do in Solaris.
3887 However, it seems that they do not in Linux for data that comes from the
3888 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3889 I found this out when I moved to a new Linux workstation and tried to run
3890 the Exim test suite.
3892 To get round this problem I have changed the code so that it now does its
3893 own call to the DNS to look up PTR records when searching for a host name.
3894 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3895 addresses that are only in /etc/hosts are still found.
3897 This behaviour is, however, controlled by an option called host_lookup_
3898 order, which defaults to "bydns:byaddr". If people want to use the other
3899 order, or indeed, just use one or the other means of lookup, they can
3900 specify it in this variable.
3902 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3903 some operating systems, this comes back from gethostbyaddr() as an empty
3904 string, and this is what Exim used to test for. However, it seems that in
3905 other systems, "." is yielded. Exim now tests for this case too.
3907 7. The values of check_spool_space and check_log_space are now held internally
3908 as a number of kilobytes instead of an absolute number of bytes. If a
3909 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3910 kilobyte. This means that much larger values can be stored.
3912 8. Exim monitor: an attempt to get the action menu when not actually pointing
3913 at a message produces an empty menu entitled "No message selected". This
3914 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3915 no entries in it ("Shell widget menu has zero width and/or height"). So I
3916 have added a single, blank menu entry in this case.
3918 9. Added ${quote_local_part.
3920 10. MIME decoding is now applied to the contents of Subject: header lines when
3923 11. Now that a reference to $sender_host_address automatically causes a reverse
3924 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3925 host lookup before query-style lookups in lists that might use this
3926 variable. This has therefore been abolished, and the "net-" prefix is no
3927 longer necessary for query-style lookups.
3929 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3930 have been a typo for LFLAGS, so it has been changed.
3932 13. The install script calls Exim with "-C /dev/null" in order to find the
3933 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3934 to be output. Howeve, since Exim outputs its version number before the
3935 error, it didn't break the script. It just looked ugly. I fixed this by
3936 always allowing "-C /dev/null" if the caller is root.
3938 14. Ignore overlarge ACL variable number when reading spool file - insurance
3939 against a later release with more variables having written the file.
3941 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3942 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3943 this, as well as the form without the "IPv6" on the front.
3945 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3946 OS/Makefile-Darwin file.
3948 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3949 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3951 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3952 variable. However, some OS use ints for inodes. I've added cast to long int
3953 to get rid of the compiler warning.
3955 19. I had forgotten to lock out "/../" in configuration file names when
3956 ALT_CONFIG_PREFIX was set.
3958 20. Routers used for verification do not need to specify transports. However,
3959 if such a router generated a host list, and callout was configured, Exim
3960 crashed, because it could not find a port number from the (non-existent)
3961 transport. It now assumes port 25 in this circumstance.
3963 21. Added the -t option to exigrep.
3965 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3966 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3967 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3968 them is set, LOOKUP_LSEARCH is forced.
3970 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3972 24. Added sender and host information to the "rejected by local_scan()" log
3973 line; previously there was no indication of these.
3975 25. Added .include_if_exists.
3977 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3978 Linux. It turns out that not all file systems support this. Apparently some
3979 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3980 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3981 not supported on the file descriptor, is now ignored when Exim is trying to
3982 sync a directory. This applies only to Linux.
3984 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3986 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3987 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3990 29. Added support for maildirsize files from supplied patch (modified a bit).
3992 30. The use of :fail: followed by an empty string could lead Exim to respond to
3993 sender verification failures with (e.g.):
3995 550 Verification failed for <xxx>
3996 550 Sender verify failed
3998 where the first response line was missing the '-' that indicates it is not
3999 the final line of the response.
4001 31. The loop for finding the name of the user that called Exim had a hardwired
4002 limit of 10; it now uses the value of finduser_retries, which is used for
4003 all other user lookups.
4005 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4008 33. Exim was neglecting to zero errno before one call of strtol() when
4009 expanding a string and expecting an integer value. On some systems this
4010 resulted in spurious "integer overflow" errors. Also, it was casting the
4011 result into an int without checking.
4013 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4014 did not work. The code looks as if it has *never* worked, though it appears
4015 to have been documented since at least releast 1.62. I have made it work.
4017 35. The "timeout_DNS" error in retry rules, also documented since at least
4018 1.62, also never worked. As it isn't clear exactly what this means, and
4019 clearly it isn't a major issue, I have abolished the feature by treating it
4020 as "timeout", and writing a warning to the main and panic logs.
4022 36. The display of retry rules for -brt wasn't always showing the error code
4025 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4026 timeout_connect_A, timeout_connect_MX.
4028 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4029 to the empty sender.
4031 39. The daemon was not analysing the content of -oX till after it had closed
4032 stderr and disconnected from the controlling terminal. This meant that any
4033 syntax errors were only noted on the panic log, and the return code from
4034 the command was 0. By re-arranging the code a little, I've made the
4035 decoding happen first, so such errors now appear on stderr, and the return
4036 code is 1. However, the actual setting up of the sockets still happens in
4037 the disconnected process, so errors there are still only recorded on the
4040 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4041 connections (as happens on some IP stacks) was logged at start up time as
4042 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4043 it from "IPv6 and IPv4", which means that two separate sockets are being
4046 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4047 says whether AF_INET or AF_INET6 was passed as an argument.
4049 42. Exiwhat output was messed up when time zones were included in log
4052 43. Exiwhat now gives more information about the daemon's listening ports,
4053 and whether -tls-on-connect was used.
4055 44. The "port" option of the smtp transport is now expanded.
4057 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4058 silently ignored. Now an error message is written to the main and panic
4061 46. There's a new ACL modifier called "logwrite" which writes to a log file
4062 as soon as it is encountered.
4064 47. Added $local_user_uid and $local_user_gid at routing time.
4066 48. Exim crashed when trying to verify a sender address that was being
4069 49. Exim was recognizing only a space character after ".include". It now also
4070 recognizes a tab character.
4072 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4073 extracting the relevant information from the specification. The man page no
4074 longer contains scrambled data for the -d option, and I've added a section
4075 at the front about calling Exim under different names.
4077 51. Added "extra_headers" argument to the "mail" command in filter files.
4079 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4082 53. Installed eximstats 1.29.
4084 54. Added transport_filter_timeout as a generic transport option.
4086 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4087 Cc: header lines. This was required by RFC 822, but it not required by RFC
4090 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4091 incoming messages that did not have them. Now it does so only if the
4092 message originates locally, that is, if there is no associated remote host
4093 address. When Resent- header lines are present, this applies to the Resent-
4094 lines rather than the non-Resent- lines.
4096 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4097 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4099 58. Messages for configuration errors now include the name of the main
4100 configuration file - useful now that there may be more than one file in a
4101 list (.included file names were always shown).
4103 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4104 for those rare installations that do not start the daemon as root or run it
4105 setuid root. I've cut out the call to initgroups() if the daemon is not
4108 60. The Exim user and group can now be bound into the binary as text strings
4109 that are looked up at the start of Exim's processing.
4111 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4113 62. Added $mailstore_basename variable.
4115 63. Installed patch to sieve.c from Michael Haardt.
4117 64. When Exim failed to open the panic log after failing to open the main log,
4118 the original message it was trying to log was written to stderr and debug
4119 output, but if they were not available (the usual case in production), it
4120 was lost. Now it is written to syslog before the two lines that record the
4121 failures to open the logs.
4123 65. Users' Exim filters run in subprocesses under the user's uid. It is
4124 possible for a "deliver" command or an alias in a "personal" command to
4125 provoke an address rewrite. If logging of address rewriting is configured,
4126 this fails because the process is not running as root or exim. There may be
4127 a better way of dealing with this, but for the moment (because 4.30 needs
4128 to be released), I have disabled address rewrite logging when running a
4129 filter in a non-root, non-exim process.
4135 1. The buildconfig auxiliary program wasn't quoting the value set for
4136 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4137 not defined. This bug was masked in 4.22 by the effect that was fixed in
4140 2. Some messages that were rejected after a message id was allocated were
4141 shown as "incomplete" by exigrep. It no longer does this for messages that
4142 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4144 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4145 have allow_domain_literals set, the ID did not get logged in the <= line.
4146 Domain literals are now always recognized in Message-ID: header lines.
4148 4. The first argument for a ${extract expansion item is the key name or field
4149 number. Leading and trailing spaces in this item were not being ignored,
4150 causing some misleading effects.
4152 5. When deliver_drop_privilege was set, single queue runner processes started
4153 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4154 same command in the process it spins off) were not dropping privilege.
4156 6. When the daemon running as "exim" started a queue runner, it always
4157 re-executed Exim in the spun-off process. This is a waste of effort when
4158 deliver_drop_privilege is set. The new process now just calls the
4159 queue-runner function directly.
4165 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4168 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4169 ignored. Though the use of -oP was forcing the writing of a pid file, it
4170 was always written to the default place.
4172 3. If the message "no IP address found for host xxxx" is generated during
4173 incoming verification, it is now followed by identification of the incoming
4174 connection (so you can more easily find what provoked it).
4176 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4178 5. Added some features to "harden" Exim a bit more against certain attacks:
4180 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4181 be put in Local/Makefile. This is like the never_users runtime option,
4182 but it cannot be overridden. The default setting is "root".
4184 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4185 prefix string with which any file named in a -C command line option
4188 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4189 is retained for -C and -D only if the caller of Exim is root. Without
4190 it, the exim user may also use -C and -D and retain privilege.
4192 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4193 command line option is disabled.
4195 6. Macro names set by the -D option must start with an upper case letter, just
4196 like macro names defined in the configuration file.
4198 7. Added "dereference=" facility to LDAP.
4200 8. Two instances of the typo "uknown" in the source files are fixed.
4202 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4203 the Configure-Makefile script screwed up while processing it.
4205 10. Incorporated PCRE 4.4.
4207 11. The SMTP synchronization check was not operating right at the start of an
4208 SMTP session. For example, it could not catch a HELO sent before the client
4209 waited for the greeting. There is now a check for outstanding input at the
4210 point when the greeting is written. Because of the duplex, asynchronous
4211 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4212 way, but not yet received, when the check is performed.
4214 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4215 on TCP/IP sockets, because this apparently causes some broken clients to
4218 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4219 unchanged) from the Cygwin maintainer.
4221 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4222 was supported instead of testing for mbx. Effectively a typo.
4224 15. The spa authenticator server code was not checking that the input it
4225 received was valid base64.
4227 16. The debug output line for the "set" modifier in ACLs was not showing the
4228 name of the variable that was being set.
4230 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4232 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4233 lookup on its own. Something else was needed to trigger the lookup. For
4234 example, a match in host_lookup or the need for a host name in a host list.
4235 Now, if $sender_host_name is referenced and the host name has not yet been
4236 looked up, a lookup is performed. If the lookup fails, the variable remains
4237 empty, and $host_lookup_failed is set to "1".
4239 19. Added "eqi" as a case-independent comparison operator.
4241 20. The saslauthd authentication condition could segfault if neither service
4242 nor realm was specified.
4244 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4245 error message that was logged was misleading, and incoming SMTP
4246 connections were dropped. The message is now more accurate, and temporary
4247 errors are given to SMTP connections.
4249 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4250 (except RSET) with a 421 error, until QUIT is received. However, it was
4251 failing to send a response to QUIT.
4253 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4254 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4255 ACL is now run after the helo_try_verify_hosts code.
4257 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4258 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4259 case-independent, so other case variants are also recognized). Apparently
4260 some systems use these upper case variants.
4262 25. If more than two messages were waiting for the same host, and a transport
4263 filter was specified for the transport, Exim sent two messages over the
4264 same TCP/IP connection, and then failed with "socket operation on non-
4265 socket" when it tried to send the third.
4267 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4269 27. The extern definition of crypt16() in expand.c was not being excluded when
4270 the OS had its own crypt16() function.
4272 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4273 as a preferred synonym for return_size_limit, both as an option and as an
4276 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4278 30. Changed the default configuration ACL to relax the local part checking rule
4279 for addresses that are not in any local domains. For these addresses,
4280 slashes and pipe symbols are allowed within local parts, but the sequence
4281 /../ is explicitly forbidden.
4283 31. SPA server authentication was not clearing the challenge buffer before
4286 32. log_message in a "warn" ACL statement was writing to the reject log as
4287 well as to the main log, which contradicts the documentation and doesn't
4288 seem right (because no rejection is happening). So I have stopped it.
4290 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4291 However, I am unable to do any testing of this.
4293 34. Fixed an infelicity in the appendfile transport. When checking directories
4294 for a mailbox, to see if any needed to be created, it was accidentally
4295 using path names with one or more superfluous leading slashes; tracing
4296 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4298 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4299 contents are added to the log line that is written for every discarded
4300 recipient. (Previously a log_message setting was ignored.)
4302 36. The ${quote: operator now quotes the string if it is empty.
4304 37. The install script runs exim in order to find its version number. If for
4305 some reason other than non-existence or emptiness, which it checks, it
4306 could not run './exim', it was installing it with an empty version number,
4307 i.e. as "exim-". This error state is now caught, and the installation is
4310 38. An argument was missing from the function that creates an error message
4311 when Exim fails to connect to the socket for saslauthd authentication.
4312 This could cause Exim to crash, or give a corrupted message.
4314 39. Added isip, isip4, and isip6 to ${if conditions.
4316 40. The ACL variables $acl_xx are now saved with the message, and can be
4317 accessed later in routers, transports, and filters.
4319 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4320 strings in the file are not string-expanded.
4322 42. If a MAIL command specified a SIZE value that was too large to fit into an
4323 int variable, the check against message_size_limit failed. Such values are
4324 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4325 day this will have to be increased, but I don't think I want to be around
4326 when emails are that large.
4333 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4334 iconv() is not standard in FreeBSD.
4336 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4337 IPv6 enabled. The observed symptom was a segmentation fault on return from
4338 the function os_common_find_running_interfaces() in src/os.c.
4340 3. In the check_special_case() function in daemon.c I had used "errno" as an
4341 argument name, which causes warnings on some systems. This was basically a
4342 typo, since it was named "eno" in the comments!
4344 4. The code that waits for the clock to tick (at a resolution of some fraction
4345 of a second) so as to ensure message-id uniqueness was always waiting for
4346 at least one whole tick, when it could have waited for less. [This is
4347 almost certainly not relevant at current processor speeds, where it is
4348 unlikely to ever wait at all. But we try to future-proof.]
4350 5. The function that sleeps for a time interval that includes fractions of a
4351 second contained a race. It did not block SIGALRM between setting the
4352 timer, and suspending (a couple of lines later). If the interval was short
4353 and the sigsuspend() was delayed until after it had expired, the suspension
4354 never ended. On busy systems this could lead to processes getting stuck for
4357 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4358 process, before it forks any delivery processes. The open lookup caching
4359 mechanism meant that the open file or database connection was passed into
4360 the delivery process. The problem was that delivery processes always tidy
4361 up cached lookup data. This could cause a problem for the next delivery
4362 process started by the queue runner, because the external queue runner
4363 process does not know about the closure. So the next delivery process
4364 still has data in the lookup cache. In the case of a file lookup, there was
4365 no problem because closing a file descriptor in a subprocess doesn't affect
4366 the parent. However, if the lookup was caching a connection to a database,
4367 the connection was closed, and the second delivery process was likely to
4368 see errors such as "PGSQL: query failed: server closed the connection
4369 unexpectedly". The problem has been fixed by closing all cached lookups
4370 in a queue runner before running a delivery process.
4372 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4373 seem to have the "const" qualifier which it has on other OS. I've
4376 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4377 *of the same type* (client or server) with the same public name that an
4378 error should be diagnosed.
4380 9. When Exim looked up a host name for an IP address, but failed to find the
4381 original IP address when looking up the host name (a safety check), it
4382 output the message "<ip address> does not match any IP for NULL", which was
4383 confusing, to say the least. The bug was that the host name should have
4384 appeared instead of "NULL".
4386 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4387 user that is built into the binary, and the -C or -D options is used, root
4388 privilege is dropped before the configuration file is read. In addition,
4389 logging is switched to stderr instead of the normal log files. If the
4390 configuration then re-defines the Exim user, the unprivileged environment
4391 is probably not what is expected, so Exim logs a panic warning message (but
4394 However, if deliver_drop_privilege is set, the unprivileged state may well
4395 be exactly what is intended, so the warning has been cut out in that case,
4396 and Exim is allowed to try to write to its normal log files.
4402 1. smtp_return_error_details was not giving details for temporary sender
4403 or receiver verification errors.
4405 2. Diagnose a configuration error if two authenticators have the same public
4408 3. Exim used not to create the message log file for a message until the first
4409 delivery attempt. This could be confusing when incoming messages were held
4410 for policy or load reasons. The message log file is now created at the time
4411 the message is received, and an initial "Received" line is written to it.
4413 4. The automatically generated man page for command line options had a minor
4414 bug that caused no ill effects; however, a more serious problem was that
4415 the procedure for building the man page automatically didn't always
4416 operate. Consequently, release 4.20 contains an out-of-date version. This
4417 shouldn't happen again.
4419 5. When building Exim with embedded Perl support, the script that builds the
4420 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4421 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4423 6. The freeze_tell option was not being used for messages that were frozen on
4424 arrival, either by an ACL or by local_scan().
4426 7. Added the smtp_incomplete_transaction log selector.
4428 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4429 was accepting AUTH without a new EHLO.
4431 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4432 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4435 10. Logging of TCP/IP connections (when configured) now happens in the main
4436 daemon process instead of the child process, so that the TCP/IP connection
4437 count is more accurate (but it can never be perfect).
4439 11. The use of "drop" in a nested ACL was not being handled correctly in the
4440 outer ACL. Now, if condition failure induced by the nested "drop" causes
4441 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4442 or "require"), the connection is dropped.
4444 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4445 that yield "discard" can now be used with an "accept" or a "discard" verb,
4446 but an error is generated for any others (because I can't see a useful way
4447 to define what should happen).
4449 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4450 are now processed in the same way as lines in the Exim configuration file.
4451 In particular, continuation lines are supported.
4453 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4455 15. Added -ti meaning -t -i.
4457 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4458 domains, and warn by logging if others are found.
4460 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4461 returned from GIFCONF when Exim is trying to find the list of interfaces on
4462 a host. The code in os.c has been modified to copy each ifreq to an aligned
4463 structure in all cases.
4465 Also, in some cases, the returned ifreq's were being copied to a 'struct
4466 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4467 means the last couple of bytes of an IPv6 address could be chopped if the
4468 ifreq contained only a normal sockaddr (14 bytes storage).
4470 18. Named domain lists were not supported in the hosts_treat_as_local option.
4471 An entry such as +xxxx was not recognized, and was treated as a literal
4474 19. Ensure that header lines added by a DATA ACL are included in the reject log
4475 if the ACL subsequently rejects the message.
4477 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4478 MD5 (which is deprecated).
4480 21. When testing a filter file using -bf, Exim was writing a message when it
4481 took the sender from a "From " line in the message, but it was not doing so
4482 when it took $return_path from a Return-Path: header line. It now does.
4484 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4485 with a valid header line field name (a series of printing characters
4486 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4488 23. Changed "disc" in the source to "disk" to conform to the documentation and
4489 the book and for uniformity.
4491 24. Ignore Sendmail's -Ooption=value command line item.
4493 25. When execve() failed while trying to run a command in a pipe transport,
4494 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4495 could be confused with a return value of 69 from the command itself. This
4496 has been changed to 127, the value the shell returns if it is asked to run
4497 a non-existent command. The wording for the related log line suggests a
4498 non-existent command as the problem.
4500 26. If received_header_text expands to an empty string, do not add a Received:
4501 header line to the message. (Well, it adds a token one on the spool, but
4502 marks it "old" so that it doesn't get used or transmitted.)
4504 27. Installed eximstats 1.28 (addition of -nt option).
4506 28. There was no check for failure on the call to getsockname() in the daemon
4507 code. This can fail if there is a shortage of resources on the system, with
4508 ENOMEM, for example. A temporary error is now given on failure.
4510 29. Contrary to the C standard, it seems that in some environments, the
4511 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4512 program. Exim now does this explicitly; it affects the formatting of
4513 timestamps using strftime().
4515 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4516 complaints. I've now initialized all the variables, to avoid this.
4518 32. Header lines added by a system filter were not being "seen" during
4519 transport-time rewrites.
4521 33. The info_callback() function passed to OpenSSL is set up with type void
4522 (*)(SSL *, int, int), as described somewhere. However, when calling the
4523 function (actually a macro) that sets it up, the type void(*)() is
4524 expected. I've put in a cast to prevent warnings from picky compilers.
4526 34. If a DNS black list lookup found a CNAME record, but there were no A
4527 records associated with the domain it pointed at, Exim crashed.
4529 35. If a DNS black list lookup returned more than one A record, Exim ignored
4530 all but the first. It now scans all returned addresses if a particular IP
4531 value is being sought. In this situation, the contents of the
4532 $dnslist_value variable are a list of all the addresses, separated by a
4535 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4536 to accept a host name and all its aliases if the forward lookup for any of
4537 them yielded the IP address of the incoming connection. Now it accepts only
4538 those names whose forward lookup yields the correct IP address. Any other
4539 names are discarded. This closes a loophole whereby a rogue DNS
4540 administrator could create reverse DNS records to break through a
4541 wildcarded host restriction in an ACL.
4543 37. If a user filter or a system filter that ran in a subprocess used any of
4544 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4545 the wrong values were passed to the pipe command ($thisaddress had the
4546 value of $0, $0 had the value of $1, etc). This bug was introduced by
4547 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4549 38. Improved the line breaking for long SMTP error messages from ACLs.
4550 Previously, if there was no break point between 40 and 75 characters, Exim
4551 left the rest of the message alone. Two changes have been made: (a) I've
4552 reduced the minimum length to 35 characters; (b) if it can't find a break
4553 point between 35 and 75 characters, it looks ahead and uses the first one
4554 that it finds. This may give the occasional overlong line, but at least the
4555 remaining text gets split now.
4557 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4558 file descriptors might be low, and that setting 1000 would always raise it.
4559 It turns out that in some environments, the limit is already over 1000 and
4560 that lowering it causes trouble. So now Exim takes care not to decrease it.
4562 40. When delivering a message, the value of $return_path is set to $sender_
4563 address at the start of routing (routers may change the value). By an
4564 oversight, this default was not being set up when an address was tested by
4565 -bt or -bv, which affected the outcome if any router or filter referred to
4568 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4569 log only when "message" or "log_message" are set. However, if one of the
4570 conditions was an address verification, or a call to a nested ACL, the
4571 messages generated by the underlying test were being passed through. This
4572 no longer happens. The underlying message is available in $acl_verify_
4573 message for both "message" and "log_message" expansions, so it can be
4574 passed through if needed.
4576 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4577 new expansion $bh_ to give the encoded byte string without charset
4578 translation. Translation happens only if iconv() is available; HAVE_ICONV
4579 indicates this at build time. HEADERS_CHARSET gives the charset to
4580 translate to; headers_charset can change it in the configuration, and
4581 "headers charset" can change it in an individual filter file.
4583 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4584 that creates RFC 2047 encoded "words" labels them as that charset instead
4585 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4586 expansion operator; (ii) when Exim creates a From: line for a local
4587 message; (iii) when a header line is rewritten to include a "phrase" part.
4589 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4590 buggy, causing it to skip the first lines of messages whose message ID
4591 ended in 'D'. This would not have bitten before Exim release 4.14, because
4592 message IDs were unlikely to end in 'D' before then. The effect was to have
4593 incorrect size information for certain domains.
4595 45. #include "config.h" was missing at the start of the crypt16.c module. This
4596 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4599 46. If there was a timeout during a "random" callout check, Exim treated it as
4600 a failure of the random address, and carried on sending RSET and the real
4601 address. If the delay was just some slowness somewhere, the response to the
4602 original RCPT would be taken as a response to RSET and so on, causing
4603 mayhem of various kinds.
4605 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4606 when I implemented it. It didn't allow for the fact that some option values
4607 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4608 the right test for positive values.
4610 48. Domain names in DNS records are case-independent. Exim always looks them up
4611 in lower case. Some resolvers return domain names in exactly the case they
4612 appear in the zone file, that is, they may contain uppercase letters. Not
4613 all resolvers do this - some return always lower case. Exim was treating a
4614 change of case by a resolver as a change of domain, similar to a widening
4615 of a domain abbreviation. This triggered its re-routing code and so it was
4616 trying to route what was effectively the same domain again. This normally
4617 caused routing to fail (because the router wouldn't handle the domain
4618 twice). Now Exim checks for this case specially, and just changes the
4619 casing of the domain that it ultimately uses when it transmits the message
4622 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4625 50. If a filter generated a file delivery with a non-absolute name (possible if
4626 no home directory exists for the router), the forbid_file option was not
4629 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4630 the existing equality matching.
4632 52. Exim was using ints instead of ino_t variables in some places where it was
4633 dealing with inode numbers.
4635 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4636 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4637 called TMPDIR, and if it finds it is different, it changes its value.
4639 54. The smtp_printf() function is now made available to local_scan() so
4640 additional output lines can be written before returning. There is also an
4641 smtp_fflush() function to enable the detection of a dropped connection.
4642 The variables smtp_input and smtp_batched_input are exported to
4645 55. Changed the default runtime configuration: the message "Unknown user"
4646 has been removed from the ACL, and instead placed on the localuser router,
4647 using the cannot_route_message feature. This means that any verification
4648 failures that generate their own messages won't get overridden. Similarly,
4649 the "Unrouteable address" message that was in the ACL for unverifiable
4650 relay addresses has also been removed.
4652 56. Added hosts_avoid_esmtp to the smtp transport.
4654 57. The exicyclog script was not checking for the esoteric option
4655 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4656 will work only if exicyclog is run under the appropriate euid.
4658 58. Following a discussion on the list, the rules by which Exim recognises line
4659 endings on incoming messages have been changed. The -dropcr and drop_cr
4660 options are now no-ops, retained only for backwards compatibility. The
4661 following line terminators are recognized: LF CRLF CR. However, special
4662 processing applies to CR:
4664 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4665 nor a local message in the state where . is a terminator.
4667 (ii) If a bare CR is encountered in a header line, an extra space is added
4668 after the line terminator so as not to end the header. The reasoning
4669 behind this is that bare CRs in header lines are most likely either
4670 to be mistakes, or people trying to play silly games.
4672 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4673 was being incorrectly given as 18 bytes larger than it should have been.
4674 This is a VOB (very old bug).
4676 60. This may never have affected anything current, but just in case it has:
4677 When the local host is found other than at the start of a list of hosts,
4678 the local host, those with the same MX, and any that follow, are discarded.
4679 When the list in question was part of a longer list of hosts, the following
4680 hosts (not currently being processed) were also being discarded. This no
4681 longer happens. I'm not sure if this situation could ever has previously
4684 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4687 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4688 header. This is something that is recommended in a new Internet Draft, and
4689 is something that is documented as being done by Sendmail. There are two
4690 possible values. For messages generated by the autoreply transport, Exim
4693 Auto-Submitted: auto-replied
4695 whereas for all other generated messages (e.g. bounces) it adds
4697 Auto-Submitted: auto-generated
4699 63. The "personal" condition in filters now includes a test for the
4700 Auto-Submitted: header. If it contains the string "auto-" the message it
4701 not considered personal.
4703 64. Added rcpt_include_affixes as a generic transport option.
4705 65. Added queue_only_override (default true).
4707 66. Added the syslog_duplication option.
4709 67. If what should have been the first header line of a message consisted of
4710 a space followed by a colon, Exim was mis-interpreting it as a header line.
4711 It isn't of course - it is syntactically invalid and should therefore be
4712 treated as the start of the message body. The misbehaviour could have
4713 caused a number of strange effects, including loss of data in subsequent
4714 header lines, and spool format errors.
4716 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4717 client host had authenticated. This control can now be exercised by an ACL
4718 for more flexibility.
4720 69. By default, callouts do not happen when testing with -bh. There is now a
4721 variant, -bhc, which does actually run the callout code, including
4722 consulting and updating the callout cache.
4724 70. Added support for saslauthd authentication, courtesy of Alexander
4727 71. If statvfs() failed on the spool or log directories while checking their
4728 size for availability, Exim confusingly gave the error "space shortage".
4729 Furthermore, in debugging mode it crashed with a floating point exception.
4730 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4731 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4732 serious problem, Exim now writes to the main and panic logs when this
4733 happens, with details of the failure. It then refuses to accept the
4734 incoming message, giving the message "spool directory problem" or "log
4735 directory problem" with a 421 code for SMTP messages.
4737 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4738 0, 1, and 2 exist, because some OS complain for execs without them (see
4739 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4740 descriptors. However, the code omitted to check that the open succeeded,
4741 causing mysterious errors if for some reason the permissions on /dev/null
4742 got screwed. Now Exim writes a message to the main and panic logs, and
4743 bombs out if it can't open /dev/null.
4745 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4746 interact so that it is all more flexible. It is supposed to remain
4747 backwards compatible. Also added extra_local_interfaces.
4749 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4750 to bomb out with an assertion failure - to the client this appears as a
4751 connection drop. This problem occurs in the part of the code that was taken
4752 from the Samba project. Fortunately, the assertion is in a very simple
4753 function, so I have fixed this by reproducing the function inline in the
4754 one place where it is called, and arranging for authentication to fail
4755 instead of killing the process with assert().
4757 75. The SPA client code was not working when the server requested OEM rather
4758 than Unicode encoding.
4760 76. Added code to make require_files with a specific uid setting more usable in
4761 the case where statting the file as root fails - usually a non-root-mounted
4762 NFS file system. When this happens and the failure is EACCES, Exim now
4763 forks a subprocess and does the per-uid checking as the relevant uid.
4765 77. Added process_log_path.
4767 78. If log_file_path was not explicitly set, a setting of check_log_space or
4768 check_log_inodes was ignored.
4770 79. If a space check for the spool or log partitions fails, the incident is now
4771 logged. Of course, in the latter case the data may get lost...
4773 80. Added the %p formatting code to string_format() so that it can be used to
4774 print addresses in debug_print(). Adjusted all the address printing in the
4775 debugging in store.c to use %p rather than %d.
4777 81. There was a concern that a line of code in smtp_in.c could overflow a
4778 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4779 initially expressed, the concern was not well-founded, because trailing
4780 spaces are removed early. However, if the trailing spaces were followed by
4781 a NULL, they did not get removed, so the overflow was possible. Two fixes
4784 (a) I re-wrote the offending code in a cleaner fashion.
4785 (b) If an incoming SMTP command contains a NULL character, it is rejected
4788 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4789 runs initgroups(), so that if the Exim user is in any additional groups,
4790 they will be used during message reception.
4796 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob